Journal articles: 'PXIe instrument'

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Li, Hai Ming, Li Mei Zhang, and Feng Sa. "Design the Integrated Multipurpose Instrument Calibrating Equipment Based on the PXI and LabVIEW." Advanced Materials Research 1037 (October 2014): 134–38. http://dx.doi.org/10.4028/www.scientific.net/amr.1037.134.

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According to the function, the technical indexes and the cost control etc, we select the embedded control computer and virtual instrument module based on the PXI, and developed the integrated multipurpose instrument calibrating equipment, it realized the field measurement and calibration of the electrical instrument away from the laboratory. The system is designed based on PXI and LabVIEW, it uses virtual instrument technology, automatic control technology and database technology, by combining these functional modules of NI, we realized the calibration of electrical instruments such as digital multimeter, signal generator, oscilloscope and cymometer etc. The system is used integrated design, and it is very flexible, it can be popularized and applied as working standard to troops, factories or schools etc.

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Chen, Guo Shun, Gang Niu, and Sa Sa Ma. "Design and Application of a Measuring and Diagnosing System Based on Networked Virtual Instrument." Applied Mechanics and Materials 128-129 (October 2011): 561–66. http://dx.doi.org/10.4028/www.scientific.net/amm.128-129.561.

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With the rapid development of virtual instrument technology and network technology, the networked virtual instruments appear great potential in remote measuring and diagnosing field. This paper first presents a measuring and diagnosing system for complicated electric equipments based on PXI/VXI networked virtual instruments, then analyze the architecture of the network and the hardware, software configurations. Currently, the system has been successfully implemented in a large, complicated electric equipment for measuring and diagnosing, and achieved good results.

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Tang, Ji Xiang, and Zhi Gang Zhu. "The Test System of PXI-Based Aeronautic Equipment." Applied Mechanics and Materials 519-520 (February 2014): 1133–38. http://dx.doi.org/10.4028/www.scientific.net/amm.519-520.1133.

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By analyzing the interface characteristics and test requirements of certain aeronautic equipment, using PXI instrument as test platform, integrated using SPIB instrument, virtual instrument, simulation technologies, independent developed video output collection equipment, SRU testing equipment modules and other hardware device, developed integrated automatic test equipment which based on PXI and GPIB bus instrument technology, provide airborne work environment for weapons, instrument, electrical, communication, navigation, identification, reactance systems airborne LRU, automatic complete the control, incentive, performance and function test of LRU.

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Huang, Hui, and Shu Mei Chen. "Design of Measurement and Control System for Medium and High Pressure Hydraulic Pump Test Platform Based on PXI Bus Structure." Advanced Materials Research 516-517 (May 2012): 876–82. http://dx.doi.org/10.4028/www.scientific.net/amr.516-517.876.

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Based of PXI (PCI Extensions for Instrumentation) bus structure, a measurement and control system for medium and high pressure hydraulic pump test platform is designed in this paper. This system is comprehensive testing equipment which has adopted the traditional technologies include hydraulic, computer, virtual instrument and detecting. Its measurement and control system has introduced new techniques with combining PXI bus structure and relay, which can realize manual/automatic synchronical operation and one key operation. Use graphic language Lab VIEW 9.0 as its developing platform, the system realizes synchronically display of the mechanical instrument and the virtual instrument which has increased the test accuracy and speed.

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Nurhidayanti, Nisa, Nur Ilman Ilyas, and Dhonny Suwazan. "Efektivitas Kombinasi Kitosan dan Ampas Kopi sebagai Adsorben Alami dalam Menurunkan Konsentrasi Arsen Pada Limbah Cair PT PXI." Jurnal Tekno Insentif 15, no. 2 (October 31, 2021): 76–87. http://dx.doi.org/10.36787/jti.v15i2.584.

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Abstrak PXI adalah salah satu perusahaan di Kabupaten Bekasi yang bergerak di bidang jasa layanan laboratorium. Dalam menjalankan kegiatannya, PXI menghasilkan logam arsen ke lingkungan. Keberadaan arsen di dalam air limbah PXI harus segera diselesaikan agar tidak mencemari lingkungan dan membahayakan kehidupan manusia. Metode yang digunakan dalam penelitian ini adalah metode eksperimen dan deskriptif kuantitatif berdasarkan data hasil laboratorium menggunakan instrumen FT-IR, SEM EDX dan AAS. Tahapan penelitian terdiri dari sintesis, karakterisasi dan penggunaan adsorben alami untuk menurunkan logam arsen pada air limbah. Hasil penelitian menunjukkan bahwa penggunaan adsorben alami kitosan dan karbon aktif ampas kopi 1,4 gram dapat menghasilkan efisiensi penurunan logam arsen tertinggi sebesar 86,18% dengan konsentrasi akhir sebesar 0,79 mg/L. Namun hasil tersebut belum memenuhi baku mutu logam arsen yang ditetapkan Peraturan Menteri Lingkungan Hidup Nomor 12 Tahun 2020. Sehingga perlu dilakukan penelitian lebih lanjut untuk meningkatkan efisiensi penurunan logam arsen. Abstract PXI is one of the companies in Bekasi Regency which is engaged in laboratory services. In carrying out its activities, PXI produces arsenic metal into the environment. The presence of arsenic in PXI wastewater must be resolved immediately so as not to pollute the environment and endanger human life. The method used in this study is an experimental and quantitative descriptive method based on laboratory data using FT-IR, SEM EDX and AAS instruments. The research stages consisted of synthesis, characterization and the use of natural adsorbents to reduce arsenic metal in wastewater. The results showed that the use of chitosan natural adsorbent and 1.4 gram coffee grounds activated carbon could produce the highest arsenic metal reduction efficiency of 86.18% with a final concentration of 0.79 mg/L. However, these results do not meet the quality standard for arsenic metal as stipulated by the Regulation of the Minister of the Environment Number 12 of 2020. So it is necessary to do further research to increase the efficiency of reducing metal arsenic.

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Zhang, Wan Fa, Lei Chen, and Ti Qiang Shan. "Design of a Static Test System of Photoelectric Parameters for a Smart Ammunition." Applied Mechanics and Materials 347-350 (August 2013): 210–13. http://dx.doi.org/10.4028/www.scientific.net/amm.347-350.210.

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A static test system of photoelectric parameters for a smart ammunition is introduced, which provides a new solution for the detection of smart ammunitions. The system uses the technology of virtual instruments, PXI buses and intelligent connectors, constructs its hardware platform by the method of PXI modules, develops the test software in the circumstance of LabWindows/CVI and accomplishes the test of related parameters by the control of relevant modules. Experiments show that, the system designs reasonably, compared with traditional testing instruments, it is more accurate, reliable, and has favorable extending. It can also finish many other kinds of smart ammunitions by add or reduce relevant hardware modules and software modules.

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Wang, Bao Peng, Yong Bin Leng, Wei Min Zhou, Lu Yang Yu, and Ying Bing Yan. "Cavity Beam Position Monitor Test System Based on Virtual Instrument." Applied Mechanics and Materials 333-335 (July 2013): 2354–57. http://dx.doi.org/10.4028/www.scientific.net/amm.333-335.2354.

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Based on the virtual instrument technology, a dedicated test system has been developed for cavity beam position monitor (CBPM). The system consists of commercial nanopositioning stage and its controller, the analog output DAQ card based on PXI and network analyzer. In the LABVIEW environment, software which implemented function of instrument control and data acquisition based on virtual instrument soft architecture (VISA) has been developed. Experimental results illustrated that the test system achieved positioning precision of sub micron which meets requirement of test of CBPM. Also it could serve CBPM signal processing system.

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Musioł, Krzysztof. "Experimental Study of Digitizers Used in High-Precision Impedance Measurements." Energies 15, no. 11 (May 31, 2022): 4051. http://dx.doi.org/10.3390/en15114051.

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In the currently used primary impedance measuring systems, there is a need to compare standards with ratios different from 1:1, e.g., in order to transfer the value to multiples or submultiples of the basic quantity. Unfortunately, the commercial PXI sampling systems used to measure the voltage ratio in the impedance bridge, although they provide adequate resolution, show a considerable non-linearity of the measurement. This leads to significant error of the impedance ratio measurement. Experimental studies of commercial PXI digitizers used in primary impedance metrology are presented in the paper. The scope of the work includes presentation of the sampling measurement system hardware used in electronic synchronous impedance bridges and studies of the parameters that affect the applicability of PXI digitizers in high-precision measuring instruments. Nonlinearity errors of digitizers on boards NI PXI-4461 and NI PXI-4462 were measured and appropriate conclusions regarding possible corrections of the errors were drawn.

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Ma, Yun Long, Li Jun Tian, Ying Lin Qin, and Tao Jiang. "Grid-Connected Photovoltaic Monitoring System Based on Virtual Instrument." Applied Mechanics and Materials 521 (February 2014): 233–40. http://dx.doi.org/10.4028/www.scientific.net/amm.521.233.

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Combined with the theories of distributed monitoring, the technologies of virtual instrumentation and database management,a grid-connected photovoltaic monitoring system is developed based on virtual instrumentation technology. The hardware architecture and software programming are expounded, by hardware and software ways, various parameters of the grid-connected photovoltaic system are collected and analyzed real-timely with CompactRIO system and PXI measuring system, it realizes the functions of monitoring the performance of the PV at the real-time, detecting the power quality of the common coupling point (PCC) and historic data management. Compared with traditional monitoring system, not only it meets the requirements of grid research for sampling speed, precision and recording capacity, but also the friendly interactive interface and the flexible expansibility are more comfortable for operators.

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Li, Qi, Yan Fei Liu, Da Cheng Luo, and Jing Jing Yang. "A New Method for High Speed CAN Protocol Conversion Circuit." Applied Mechanics and Materials 596 (July 2014): 873–76. http://dx.doi.org/10.4028/www.scientific.net/amm.596.873.

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Due to high correspondence speed, great real-time performance and good expansibility, CAN bus has been used widely in aerospace, large-scale equipments and other fields these years .This paper introduces a kind of CAN Bus Test Instrument based on PXI bus and FPGA, which is used to test and monitor the CAN bus equipment. The result of test shows that this kind of test instrument has great advantages in reliability, stability and extensibility.

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Du, Wei Ming, and Cai Bin Liu. "Research on Automatic Test System of Radar Board Based on Virtual Instrument Technology." Applied Mechanics and Materials 121-126 (October 2011): 2002–5. http://dx.doi.org/10.4028/www.scientific.net/amm.121-126.2002.

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Following the test work is difficult and complex in the modern radar maintenance support, the automatic testing of radar board is necessary for the radar maintenance man. A automatic test system of radar board based on virtual instrument technology is discussed. The system used PXI bus technology and Labview program language. The design of automatic testing system is given, its hardware solution and software solution is designed. And finally the reliability and expansibility of system design is discussed at last.

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Zhang, Bo. "Design of Ground Monitoring System Guidance System Based on Virtual Instrument." Applied Mechanics and Materials 644-650 (September 2014): 1180–84. http://dx.doi.org/10.4028/www.scientific.net/amm.644-650.1180.

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For backward status of a missile guidance device monitoring methods, developed a set of ground monitoring system based on virtual instrument technology. The system meets the standard test of a certain type of missile guidance device, the data acquisition card and controller of PXI bus as the hardware platform, using LabVIEW as the software development platform, The acquisition of analog signal, video signal and serial communication set in one, it can detect the performance and parameters of the guidance device, and monitoring the flight trajectory of the missile qualitatively. The application results show that the monitoring system is stable and reliable, improve the efficiency and accuracy of monitoring, and has a certain popularization value.

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13

Pechousek, J., and M. Mashlan. "Mössbauer spectrometer as a virtual instrument in the PXI/Compact PCI modular system." Czechoslovak Journal of Physics 55, no. 7 (July 2005): 853–63. http://dx.doi.org/10.1007/s10582-005-0087-x.

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Dadić, Martin, Petar Mostarac, Roman Malarić, and Jure Konjevod. "Digital Compensation of a Resistive Voltage Divider for Power Measurement." Electronics 10, no. 6 (March 16, 2021): 696. http://dx.doi.org/10.3390/electronics10060696.

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The paper presents a method for digital compensation of the ratio and phase angle errors of a resistive voltage divider. The system consists of a separate electrical circuit of a resistive divider, and a digital compensation system based on National Instruments (NI) PCI eXtension for Instrumentation (PXI) PXI-5922 digital acquisition cards (DAQ). A novel approach to the real-time compensation is presented, using digital signal processing. The algorithm is based on Wiener filtering and finite-impulse-response (FIR) filters. The proposed digital compensation, using FIR digital filtration and NI PXI DAQs, gives maximum magnitude error below 400 ppm and the phase angle error below 4500 μrad, in the frequency band 50 Hz–100 kHz. The algorithm allows the fine-tuning of the compensation to adjust to the possible change in the original transfer function due to the aging of the components.

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Chen, Xiao Yan, Tao Yang, and Yong Zheng Yang. "A PXI-Based Biomedical Electrical Impedance Tomography System." Applied Mechanics and Materials 670-671 (October 2014): 1205–9. http://dx.doi.org/10.4028/www.scientific.net/amm.670-671.1205.

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This paper presents a PXI-based biomedical electrical impedance tomography (BEIT) system and interprets how to build up a practical BEIT system quickly. The hardware platform of the system is composed of signal source module, switch module, signal conditioner module and PXI-6251 data acquisition card supplied by National Instruments (NI), which simplify the system structure as well as improving the stability and accuracy of the system. Different from the traditional BEIT systems, the electrodes selection, the switch pattern, the programmable gain amplifier (PGA) gain selection are realized by code programming in LabVIEW instead of electrical components design. The composition of the proposed system and the specialized software package developed in LabVIEW are introduced in detail in the paper, and experiments are undertaken to verify the feasibility of the system. The imaging results verify that the PXI-based BEIT system has prominent performance in flexibility, reliability and scalability.

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Зотин, Виталий, Vitaliy Zotin, Александр Власов, Aleksandr Vlasov, Леонид Потапов, and Leonid Potapov. "Automation of testing analog chips." Bulletin of Bryansk state technical university 2015, no. 3 (September 30, 2015): 19–23. http://dx.doi.org/10.12737/22947.

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Possible options for automated testing of analog chips with universal testers «Formula 2K» and PXI hardware company «National Instruments», as well as through a dedicated tester TR9574 Hungarian company «EMG». Described by authors developed automated testers: ATIKOU (test chip comparators and operational amplifiers) and ATIAUDIO (test chip audio amplifiers).

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Gao, Ya Yun, Xiao Hui Duan, Yue Chao Guo, and Jing Jing Liu. "A High Performance Baseband Testing Instrument for Access Network System: A PXI-Based Approach." Applied Mechanics and Materials 614 (September 2014): 461–67. http://dx.doi.org/10.4028/www.scientific.net/amm.614.461.

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High performance network over coax (HINOC) is a recently proposed technology which plays a central role in the integration of telecommunications networks, cable TV networks and the Internet. But there still is a lack of comprehensive testing equipment designed for it yet, especially in baseband signal testing area. In this paper, we designed a high performance baseband signal transmitter and analyzer for HINOC system test. The system is implemented as hardware and software co-design architecture. Both of the baseband signal transmitter and analyzer have passed a series of rigorous tests, which demonstrates that the whole system meets the HINOC test specification and can provide great assistance for follow-up HINOC research.

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Okabe, Satoshi, Michihiro Nagao, Takeshi Karino, Satoshi Watanabe, Tomohiro Adachi, Hirohiko Shimizu, and Mitsuhiro Shibayama. "Upgrade of the 32 m small-angle neutron scattering instrument SANS-U." Journal of Applied Crystallography 38, no. 6 (November 12, 2005): 1035–37. http://dx.doi.org/10.1107/s0021889805029201.

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The small-angle neutron scattering instrument, SANS-U, owned by the Institute for Solid State Physics, The University of Tokyo, has been upgraded. The SANS-U is a 32 m SANS instrument installed in 1991 at the guide hall of the JRR-3M research reactor of the Japan Atomic Energy Research Institute, and has been serving for inter-university cooperative research use since 1993. The major upgrades include (i) replacement of the two-dimensional area detector by a multi-wire type position-sensitive proportional counter, (ii) renewal of the operating system from a VAX and sequencers to an integrated PXI system controlled byLabVIEW-RTsoftware, (iii) a focusing collimation system, and (iv) a variety of accessory equipment. These upgrades provide a wide dynamic range of neutron counting, user-friendly operation and real-time circular averaging of two-dimensional data.

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Cimino, C. "Rack-and-stack instruments: often a better choice than VXI or PXI systems." Computing and Control Engineering 16, no. 1 (February 1, 2005): 16–19. http://dx.doi.org/10.1049/cce:20050102.

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Lai, Biao, and Hui Qin Jia. "Development of Fault Diagnosis System for Telemetry Equipment Based on the Virtual Instrument Technology." Applied Mechanics and Materials 128-129 (October 2011): 571–74. http://dx.doi.org/10.4028/www.scientific.net/amm.128-129.571.

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A fault diagnosis system based on the Client/Server mode is developed, which realizes the purpose of diagnosing the Telemetry Equipment placing on the station address through local or IP network. And the fault method uses the fault tree to describe the logic relation between fault nodes. And the fault tree is realized by virtual instrument. The signal acquisition module uses PXI architecture, the interactive user interface is develops under LabVIEW graphical software and the data storage uses SQL server database platform. The developed fault diagnosis system can realize the functions of information management on instrument and fault node, fault detection or location, and device remote control. Now this system is used in test area, which improves the telemetry equipment maintenance rate.

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Cai, Gui Fang. "Design of a Virtual Automatic Test System of the Missile Autopilot." Applied Mechanics and Materials 543-547 (March 2014): 1377–80. http://dx.doi.org/10.4028/www.scientific.net/amm.543-547.1377.

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To improve the test speed and efficiency, a virtual automatic test system of missile autopilot is designed. The inbuilt computer is used as the core of the system; the modularization instrument bus standard which composed of the PXI card, the programmable instrument and other advanced test techniques is adopted. The automation test device hardware facility is used in the virtual automatic test system; the pilot mechanism fault analysis software is developed, so the faults of the missile autopilot can be located faster and more accurate. The virtual automatic test system can be used to test the current parameters, special capability and the function of the electronic parts among the missile weapon system.

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Zhang, Qin Ling, Yang Liu, and Peng Liang Sun. "Fault Diagnosis Expert System for Electric Power System of the Large-Scale UAVs Based on Virtual Instrument." Advanced Materials Research 663 (February 2013): 572–79. http://dx.doi.org/10.4028/www.scientific.net/amr.663.572.

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In this paper, a test system hardware platform based on PXI bus system is proposed to test the airborne power system and typical power distribution structure of large-scale Unmanned aerial vehicles (UAV). By researching system structure, analyzing failure mode and designing fault tree, fault diagnosis expert system is designed to test the airborne power system in large-scale UAVs, where a forward reasoning expert knowledge base based on extension rule is built to solve the non-exact inference in complex system via introducing certainty factor. The experiments illustrate that the proposed system can effectively improve the intelligent level of test system and has good application prospects.

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Zhao, Yi, and Hui Bing Guo. "Multi-Channel Voltage Pulse Testing Based on Lab Windows/CVI." Applied Mechanics and Materials 182-183 (June 2012): 850–53. http://dx.doi.org/10.4028/www.scientific.net/amm.182-183.850.

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The paper introduces the principle of multi-channel voltage pulse testing scheme based on Lab Windows/CVI. 32 channels of a control system are synchronized acquired through a PXI module NI 6259 and displayed on the virtual instrument interface developed with CVI. The paper illustrates the process of synchronized-selecting more detail in figures and presents a means of how to transform a datum matrix come from NI 6259 to another one which can be calculated and programmed conveniently.

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Sun, Yong Sheng, Xiao Qiang Yang, Li Pei, and Sun Yan. "Fault Diagnosis of Mechanized Bridge’s Electrical System Based on I²C-bus and Virtual Instrument Technology." Applied Mechanics and Materials 597 (July 2014): 444–49. http://dx.doi.org/10.4028/www.scientific.net/amm.597.444.

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The electrical system fault testing and diagnosis system based on I2C-bus and embedded equipment is proposed. This system is accomplished with the integration of PXI-based computer, field fault testing platform, dedicated interface adapter unit and accessories with software program of virtual instrument and database management and fault guidance system. It can obtain various state parameters of the heavy mechanized bridge by interface adapter unit and corresponding sensors. The dedicated interface adapter unit, that is the core of the hardware platform is composed of chassis, embedded microcomputer controller, I2C-bus data acquisition modules, VPC connection package and military aviation sockets. Because of its flexibility and modular design, it can support different data conversion, for example, analog, digital, and serial, while functioning as an intelligent conversion bridge between field fault testing platform or PXI computer and electrical system of heavy mechanized bridge electrical system. The fault diagnosis software is of hierarchical modular structure with integration of system management control, fault detection and circuit hardware driver modules together with fault repair and diagnosis database. Therefore it provides functions of human-machine interaction, equipment fault detection, fault diagnosis and analysis, as well as repair and maintenance guidance The fault testing and diagnosis system in this work is also featured with handy structure, lightweight, low consumption, large storage capacity, excellent expandability and intelligent inference capability. The system can be used in the online fault testing and diagnosis of similar engineering equipments. So it has important engineering and military application value to the rapid fault testing and fault diagnosis of engineering equipments.

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Zhang, Pengyun, and Henan Guo. "Ultra-high Speed and Dual-Channel Data Acquisition Card with 1GSPS Based on PXI Bus." Modern Electronic Technology 2, no. 1 (January 16, 2018): 22. http://dx.doi.org/10.26549/met.v2i1.753.

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This paper discusses the chief techniques and design principles of an ultra-high speed and dual-channel data acquisition card based on PXI bus, using FPGA (Field Programmable Gate Array) as logic controller cell. The instrument consists of pre-process circuit, A/D converter, SDRAM (Synchronous Dynamic random access memory), and control circuit integrated in FPGA. It can achieve allowing up to 1000MHz real-time sampling rate. The test result indicates that the system works normally and the system design is successful.

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Ren, Yan Xi, Xiao Qiang Yang, Qing Xia Li, and Jun Da Chen. "Fault Diagnosis System of Engineering Equipment's Electrical System Using Dedicated Interface Adapter Unit." Key Engineering Materials 567 (July 2013): 155–60. http://dx.doi.org/10.4028/www.scientific.net/kem.567.155.

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The development of fault detection and diagnosis system is accomplished with the application of PXI interface technology, modular instrument and signal processing technology. The total technical scheme of host computer, portable test platform, signal adapter unit, test interface and cable together with peripheral components is introduced in the presented system. Consequently, the hardware includes master computer (fault test and diagnosis platform), PXI-bus data acquisition system, signal interface adapter, power supply system, interface unit, connection cable and peripheral dedicated test equipments. And the software is developed by C and LabWindows/CVI based on Win32 operating system. In addition, the modular and object-oriented programming are adopted in the software development. The software consists of three parts: the master program running on test and diagnosis platform, the client software module on signal adapter unit as well as the remote interface software module. It can implement fault detection of electrical system on replaceable circuit board and block of the hydraulic system or electrical system. So it can help equipment repairmen and operator perform quick repairs and maintenance to the electrical system for engineering equipment.

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Xu, Zhen Hui, Li Xu, Shi Hai Zhou, and Zhen Jun Yang. "Research on Technical Conditions Testing Line of Certain Tank Gun Weapon System." Applied Mechanics and Materials 602-605 (August 2014): 1630–33. http://dx.doi.org/10.4028/www.scientific.net/amm.602-605.1630.

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In certain tank gun technical conditions integrated testing line, we firstly realize on line test of tank gun under non disassembly situation by using data acquisition card ----4472B produced in American NI Company. It realizes multiple data concurrent acquisition and processing and ensures the integral correlation of each testing data. The system adopts PXI main control platform and actualizes the technical conditions integrated test system of breechblock and recoil system based on Virtual Instrument technology. Through practical use, the result proves that the system has prominent character of integrated testing, online testing, visual data and convenient operation.

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He, Chi, Zheng Guo Dai, Guang Ling Dong, Chao Feng Huang, Hong Qiang Wei, and Ji Hua Zhang. "Design of Test and Adjustment System for Coordinator of Infrared Seeker." Applied Mechanics and Materials 336-338 (July 2013): 1003–7. http://dx.doi.org/10.4028/www.scientific.net/amm.336-338.1003.

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Test and adjustment system of coordinator (T&ASC) is, virtual instrument technology based, developed. PXI measurement control platform, turntable system, target simulator and air source equipment are integrated in hardware design. Multithreading, IMAQ Vision module and DLL techniques are used in software programming. Technical difficulties as synchronous receiving of RS422 data with high speed, direct display of LVDS video image and integrated control of turntable are solved. The system achieves the integrated design of test, control and adjustment function, which can carry out overall performance tests for coordinator automatically, and execute system parameters calibrating and adjusting intelligently.

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Chen, Shu Mei, and Wei Zhang. "The Design of the Measuring and Controlling System of the High Power Pump Performance Test-Bed Based on Virtual Instrument Technique." Advanced Materials Research 139-141 (October 2010): 1967–72. http://dx.doi.org/10.4028/www.scientific.net/amr.139-141.1967.

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To satisfy the performance test of the high power hydraulic pump, a test-bed is developed in this paper. The parameters, the sign of the control and the data of the state are concluded. The test-bed employs the virtual instrument technique and PXI bus structure as well as M series data acquisition apparatus, it can measure the important performance parameters, such as pressure, flow, torque, speed and temperature; then we deal with and analysis these data. During the testing procedure it can realize automatic control, such as regulating the flow, pressure and so on. During the measuring and controlling, we can also monitor the state of the test-bed and give an alarm, such as over temperature or pressure.

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Dadić, Martin, Bruno Sandrić, Petar Mostarac, and Roman Malarić. "A Resistive Voltage Divider for Power Measurements." Journal of Energy - Energija 69, no. 1 (February 18, 2020): 3–6. http://dx.doi.org/10.37798/202069132.

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The paper presents a resistive voltage divider (RVD), developed for power measurements at much higher frequencies than the traditional 50 Hz. The design of the RVD and the methods of its evaluation are described. The RVD is intended to be used in a digital sampling wattmeter application based on National Instruments PXI-4461 Dynamic Signal Analyzer. The design of the divider includes individual copper guards for each resistor, driven by the auxiliary chain of resistors. To reduce the leakage currents, the PTFE terminals are applied between pins of the resistors and the printed circuit board.

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Nurhidayanti, Nisa, Nur Ilman Ilyas, and Dhonny Suwazan. "Effectiveness of Lead and Cadmium Reduction with Adsorption Method using a Combination of Chitosan and Coffee Grounds (Case Study of Industrial Wastewater PT.X Indonesia)." Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan 19, no. 1 (February 28, 2022): 11–23. http://dx.doi.org/10.14710/presipitasi.v19i1.11-23.

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PT. X Indonesia (PXI) is a company engaged in laboratory services in Bekasi Regency. Based on a preliminary study, the concentration of cadmium and lead in wastewater shows that it exceeds the quality standard of PerMenLHK No. P12 of 2020. The presence of cadmium and lead in PXI's wastewater must be resolved immediately to avoid dangerous human activities and polluting the environment. The research was initiated by taking wastewater samples and synthesizing the adsorbent from the combination of chitosan and activated carbon from coffee grounds. The method used in this study is an experimental approach with quantitative descriptive methods based on laboratory data using FT-IR, SEM EDX and AAS instruments. The results showed that chitosan biosorbent and 1.4-gram coffee grounds activated carbon resulted in the highest cadmium metal reduction efficiency of 94.35% and led to a metal reduction efficiency of 90.86%. The results concluded that the adsorbent of chitosan-activated carbon coffee grounds is very effective in reducing cadmium and lead metals in the wastewater of PXI. This research needs to follow up by increasing the mass of activated carbon of coffee grounds to meet quality standards.

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Zhao, Yan Qiu, and Yong Chen. "Engine HIL Signal Imitation Design Based on LabVIEW." Applied Mechanics and Materials 543-547 (March 2014): 1201–5. http://dx.doi.org/10.4028/www.scientific.net/amm.543-547.1201.

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In the development and test of engine ECU, HIL is used widely .ECU needs a lot of drive signals in order to ensure HIL can work normally. Mixing programme based virtual instrument technology and Matlab / Simulink model realized engine signal simulation to provide drive signals for ECU. Meanwhile, NI PXI boards which output analog signal were used as hardware devices in the paper and LabVIEW software were adopted to drive boards and process analog signal, achieving accurate simulating signal on engine excitation signal. The results for test show that the system is able to simulate exciting signal for the engine ECU accurately, provides a low-cost, low pollution, high efficiency way to test and develop engine and its ECU and increase security and reliability of test system.

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Zhang, Qing Yong, Lan Chun Zhang, and Jing Bo Zhao. "Testy Study on Vehicle Test Rig with Electric Control and Hydrostatic Drive Using a Revised Fuzzy Algorithm." Applied Mechanics and Materials 39 (November 2010): 517–22. http://dx.doi.org/10.4028/www.scientific.net/amm.39.517.

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This paper investigates test study of vehicle test rig with electric control and hydrostatic drive (ECHD). The test rig is built up based on the hydrostatic transmission and measurement & control components are the virtual instruments, PXI and labview. At the starting point, this study considers the speed control of the hydrostatic transmission using a revised fuzzy logic law to find the optimal solution for displacement varying of hydraulic variable Pump/Motor assuming a static speed as target speed. And based on the revised fuzzy logic, the typical driving cycle is employed to verify its process control effectiveness. The test results provided by the revised fuzzy logic test demonstrates the effectiveness in speed control of the ECHD vehicle.

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Qiu, Chang Quan, and Hong Lei Qin. "Research of the Wireless Distributed Test System Based on WLAN." Advanced Materials Research 433-440 (January 2012): 6224–29. http://dx.doi.org/10.4028/www.scientific.net/amr.433-440.6224.

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It’s absolutely necessary to create distributed test system for distributed UUT. However, distributed test systems constructed by the existing test bus products such as GPIB, VXI, PXI and LXI are all wired communication network based, which cannot satisfy certain test requirements. In this paper, on the basis of research about wireless communication network expansibility of modern test instrument, the thesis puts forward wireless distributed test system based on WLAN, introduces topology architecture, MAC layer protocol and physical layer technology, and presents some solutions on the key issues such as real-time, clock synchronization and trigger synchronization, etc. As for clock synchronization, the paper describes synchronization mechanisms based TSF, TINY/MINI-SYNC algorithm and IEEE 1588 precise time protocol, and for trigger synchronization it presents methods based on command, event and time, etc.

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Yang, Xiao Qiang, Ya Ming Gao, Ying Liu, and Jun Han. "Study on Universal Testing Platform of Engineering Machinery." Applied Mechanics and Materials 33 (October 2010): 544–48. http://dx.doi.org/10.4028/www.scientific.net/amm.33.544.

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Due to the multiple types and complexity of fault diagnosis, the general-purpose testing platform of engineering machinery’s hydraulic system is developed for the maintenance of military equipment. The general function and structure of the testing platform is presented. The hardware system consists of modular circuit, integrates control computer of embedded controller with PXI-interfaced modular instrument, program-controlled device, connector and adapter hardware. And the software program comprises data management module, fault diagnosis module coupled to the data acquisition module, signal processing module, experiment condition control module, database access module, system configuration and self-test as well as help module. Further, the hardware characteristics are showed and the principle of hydraulic testing platform is presented. The universal testing platform offers enormous benefits for fault diagnosis and condition monitoring of military equipment and machinery.

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Meng, Shi Yang, and M. H. Aliabadi. "Automation Using Matrix Switch for Piezoelectric Actuator/Sensor Based Structural Health Monitoring." Key Engineering Materials 627 (September 2014): 213–16. http://dx.doi.org/10.4028/www.scientific.net/kem.627.213.

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The implementation of the switch is the stepstone of a fully automated structural health monitoring (SHM) System. This paper attempted to tackle the hardware connectivity issues when dense transducer arrays present in the system with the switch that features the matrix topology. The program that controls the instruments and automates the data acquisition for SHM system was developed in LabVIEW, in which a scanning approach that sensorises the interrogation area and a hybrid programming technique are employed. Through interfacing with a top-level GUI of the program, it is easy to be controlled and employed. The solution showed a significant reduction in testing time comparing that with manual switch operation and a weight-saving solution as a minimum number of shielded cable needed. In addition, because only one channel each from the signal generator and digitiser is required, it is less demanding on the specification of the instruments. The prototype of the current system can be scaled up for testing on a larger structure due to its modular nature in both PXI express system and software design.

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Suresh Babu, S. K., D. Jackuline Moni, D. Gracia, and Amsalu Gosu Adigo. "Investigation on V2O5 Thin Films for Field Effect Transistor Applications." Advances in Materials Science and Engineering 2021 (September 6, 2021): 1–7. http://dx.doi.org/10.1155/2021/2414589.

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V2O5 thin films are analyzed for the substitution of SiO2 to reduce the leakage current in devices when SiO2 becomes ultrathin in submicron technology. Vanadium pentoxide (V2O5) has a high-k dielectric constant of 25 and can be replaced as a gate oxide in the field-effect transistor. V2O5 is deposited using pulsed laser deposition (PLD) in the oxygen (O2) environment at room temperature and characterized. The films surface morphology has been examined by scanning electron microscopy. The capacitance, dielectric constant, and dielectric loss are analyzed for fabricated metal oxide semiconductor (MOS) structure using Solartron SI-1260 impedance analyzer. The transfer characteristic of the fabricated device is analyzed using National Instruments NI-PXI 4110. The ION/IOFF ratio of 106 and threshold voltage (VTH) of 0.6 V is obtained.

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Dello Sterpaio, Luca Dello, Antonino Marino, Pietro Nannipieri, Gianmarco Dinelli, Daniele Davalle, and Luca Fanucci. "A Complete EGSE Solution for the SpaceWire and SpaceFibre Protocol Based on the PXI Industry Standard." Sensors 19, no. 22 (November 16, 2019): 5013. http://dx.doi.org/10.3390/s19225013.

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This article presents a complete test equipment for the promising on-board serial high-speed SpaceFibre protocol, published by the European Committee for Space Standardization. SpaceFibre and SpaceWire are standard communication protocols for the latest technology sensor devices intended for on-board satellites and spacecrafts in general, especially for sensors based on image acquisition, such as scanning radiometers or star-tracking devices. The new design aims to provide the enabling tools to the scientific community and the space industry in order to promote the adoption of open standards in space on-board communications for current- and future-generation spacecraft missions. It is the first instrument expressly designed for LabVIEW users, and it offers tools and advanced features for the test and development of new SpaceFibre devices. In addition, it supports the previous SpaceWire standard and cross-communications. Thanks to novel cutting-edge design methods, the system complex architecture can be implemented on natively supported LabVIEW programmable devices. The presented system is highly customizable in terms of interface support and is provided with a companion LabVIEW application and LabVIEW Application Programming Interface (API) for user custom automated test-chains. It offers real-time capabilities and supports data rates up to 6.25 Gbps.The proposed solutions is then fairly compared with other currently available SpaceFibre test equipment. Its comprehensiveness and modularity make it suitable for either on-board device developments or spacecraft system integrations.

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Chen, Yen Bin, Yung Lung Lee, Shou Jen Hsu, Chin Chun Chang, and Yi Wei Chen. "TIG Auto Welding Process Using Adaptive Wavelet Neural Network Controller." Applied Mechanics and Materials 764-765 (May 2015): 634–39. http://dx.doi.org/10.4028/www.scientific.net/amm.764-765.634.

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The study proposed adaptive wavelet neural network controller can achieve good and precise welding control performance and use synchrotron radiation research center developed multi-gun group automatic welding system to verify the validity of the research method. Multi-gun group welding system is applied in Taiwan Photon Source (TPS). Storage ring aluminum alloy vacuum chamber of Taiwan Photon Source .In the past aluminum alloy vacuum chamber welding, it all depends on the empirical welding rule of operator to give appropriate welding current, argon flow, wire feed speed and welding speed for control. Therefore, the paper uses automatic welding skill, which takes National Instruments PXI-8180 system as basic structure, and adaptive wavelet neural network controlled four optimized parameters, I.E. welding current, wire feed speed, flow rate of argon gas and welding speed, The vacuum chamber pressure value is also up to 6.2X10-10Torr/mA. It is successfully applied to the TPS system. Therefore, it can prove the effectiveness and practicality of the method proposed in this study.

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Zhang, Hai Dan, Hu Bao, Den Gan Chen, and Jing Yu. "Research on Embedded Computer Techniques Used in Agricultural Equipments ATS." Applied Mechanics and Materials 190-191 (July 2012): 356–59. http://dx.doi.org/10.4028/www.scientific.net/amm.190-191.356.

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VXI or PXI modules based on embedded computers are playing a significant role in test systems for both agricultural and commercial applications. In an Agricultural equipments remote diagnosis and Maintenance ATS (automatic test system), we applied ARM based VXI modules to developing an equipment called Portable Maintenance Aid Equipments (PMAE) as well as an Ethernet-based measurement system which solved a sticking point of this large-scale ATS. The main testing system is designed as a large-scale integrated test system that will perform automatic test for faulty LRUs (Local Replaceable Unit), and faults will be isolated to SRUs (Shop Replaceable Unit). PMAEs could cooperate with the main testing system in realizing remote measurement and control through virtual instrument (VI) technology, thus the localization veracity of faulty LRUs and cables could be greatly improved. ARM based embedded system was used to realize 0－slot controller as well as some dedicated test modules. It could offer maximum performance and the most compact size because they are installed directly into the VXI mainframe. Test results indicated good performance of this scheme, thereby greatly augmenting diagnostic capacity and efficiency of the Agricultural equipments remote diagnosis and Maintenance ATS.

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Yu, Yong Tao, Ming Chen, Feng Tian, and Ying Ji Shan. "The Design and Realization of Airborne Electrical Equipments’ Online Test System in the Environments of Mechanics." Applied Mechanics and Materials 687-691 (November 2014): 1038–43. http://dx.doi.org/10.4028/www.scientific.net/amm.687-691.1038.

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Current OTS (Online Test System, OTS) of airborne electrical equipments in the environments of mechanics is only able to test statically but dynamically. To solve the problem, a new kind of dynamic test system based on PXI bus is designed. In the design, modular instrument resources that used in the third generation of ATE (Auto Test System, ATE) commonly is adopted to prove the system’s reusability, extensibility and standard ability, digital signal acquisition is replaced with analog signal acquisition to realize dynamic test, support from the method of process monitoring is drew to get the capability to detect the reversible failure in UUT (Unit Under Test, UTT), VC++ language is used as the software development tool to control the system and record test data. In the special mechanics environment such as centrifuge, drawing lessons from the experience of the new concept dynamic test, the system architecture of remote control acquisition is used to prove the stability and efficiency of the test system greatly. The experimental result shows that the system runs well and has more advantages such as high efficiency of auto-test and reliability of failure diagnosis results, meeting new demand of the airborne electrical equipments’ online test in the environments of mechanics.

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Ali, Saddaqat, Jahangir Badar, Faheem Akhter, Syed Sabir Hussain Bukhari, and Jong-Suk Ro. "Real-Time Controller Design Test Bench for High-Voltage Direct Current Modular Multilevel Converters." Applied Sciences 10, no. 17 (August 29, 2020): 6004. http://dx.doi.org/10.3390/app10176004.

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Modular multilevel converters (MMCs), with their inherent features and advantages over other conventional converters, have gained popularity and remain an ongoing topic of research. Many scholars have solved issues related to the operation, control, protection, and reliability of MMCs using simulation software and small hardware prototypes. We propose a novel approach for an MMC controller design with real-time systems. By utilizing a key benefit of LabVIEW Multisim co-simulation, an MMC control algorithm that can be deployed on a field-programmable gate array (FPGA) was developed in LabVIEW. The complete circuit was designed in Multisim, and a co-simulation was performed to drive an MMC model. The benefit of this topology is that control algorithms can be designed in a LabVIEW FPGA and tested with the Multisim co-simulation circuit to obtain simulation results. Once the controller works and provides satisfactory results, the same algorithm can be deployed in any NI (National Instruments) FPGA-based controller, like a compact remote input/output (RIO), to control real-time MMCs designed in an NI PCI eXtensions for Instrumentation (PXI) system. This method saves time and provides flexibility for effectively designing control algorithms and implementing them in an FPGA for real-time model implementation.

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Izadnegahdar, Alain, Stephanie L. Booth, David J. Spry, and Philip G. Neudeck. "Alternative Setup for Long-Duration Low-Duty-Cycle 600°C Ambient Testing of SiC Integrated Circuits." Additional Conferences (Device Packaging, HiTEC, HiTEN, and CICMT) 2021, HiTEC (April 1, 2021): 000076–82. http://dx.doi.org/10.4071/2380-4491.2021.hitec.000076.

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Abstract A scalable, compact oven testbed system for simultaneously evaluating a multitude of high temperature integrated circuits (ICs) for prolonged operating times of up to 600 °C has been prototyped. The new testbed system enables long-duration high temperature testing in sufficient statistical quantities consistent with standard aerospace electronics engineering standards. This setup is comprised of multiple compact ovens housing chips or packages mounted to ceramic circuit boards. Each oven is a compact 15.2 cm length by 15.2 cm width by 12.7 cm depth with a maximum 400 Watts of heating power. The custom-made silicon oxide ceramic heating block inside each oven is based on a 3D printed design adapted for the easy insertion of the IC device under test (DUT). This innovative design provides the quick insertion of ICs with or without a ceramic package into a 600 °C environment by utilizing a movable 11.43 cm long ceramic substrate with electrical traces extending from the oven hot zone to external standard plastic-based board connectors. Another key oven design feature is the minimization of the DUT exposure to electromagnetic interference (EMI) by utilizing a filtered DC power source to reduce heating element noise. Additionally, the ovens can be configured in a parallel arrangement allowing global data monitoring over a single industrial RS422 serial port. This feature is important for scaling up to test multiple ICs semi-simultaneously. A USB serial port is provided to independently control the operating parameters of each oven such as the oven target temperature and oven ramp rate. The oven temperature can reach up to 600 °C with a confirmed +/− 4 °C maximum deviation across the test zone region. The ramp rate can be programmed from 1 °C/minute up to 10 °C/minute. Furthermore, a programmable switchboard is used to interface with the DUT. This switchboard comprises a National Instruments Peripheral Component Interconnect eXtension for Instrumentation (NI PXI) system and a breakout board to send and receive power, analog or digital test signals. By using this unique oven testbed system, a variety of ICs can now be tested in parallel using the same test components configured for a diverse set of requirements.

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Yang, Li, Hong-Rui Cao, Jin-Long Zhao, Zi-Han Zhang, Qiang Li, Guo-Bin Wu, Yong-Qiang Zhang, Guo-Qiang Zhong, Li-Qun Hu, and Zi-Jun Zhang. "Development of a wide-range and fast-response digitizing pulse signal acquisition and processing system for neutron flux monitoring on EAST." Nuclear Science and Techniques 33, no. 3 (March 2022). http://dx.doi.org/10.1007/s41365-022-01016-y.

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AbstractThe neutron count rate fluctuation reaches six orders of magnitude between the ohmic plasma scenario and high power of auxiliary heating on an experimental advanced superconducting tokamak (EAST). The measurement result of neutron flux monitoring (NFM) is a significant feedback parameter related to the acquisition of radiation protection-related information and rapid fluctuations in neutron emission induced by plasma magnetohydrodynamic activity. Therefore, a wide range and high time resolution are required for the NFM system on EAST. To satisfy these requirements, a digital pulse signal acquisition and processing system with a wide dynamic range and fast response time was developed. The present study was conducted using a field-programmable gate array (FPGA) and peripheral component interconnect extension for instrument express (PXIe) platform. The digital dual measurement modes, which are composed of the pulse-counting mode and AC coupled square integral’s Campbelling mode, were designed to expand the measurement range of the signal acquisition and processing system. The time resolution of the signal acquisition and processing system was improved from 10 to 1 ms owing to utilizing high-speed analog-to-digital converters (ADCs), a high-speed PXIe communication with a direct memory access (DMA) mode, and online data preprocessing technology of FPGA. The signal acquisition and processing system was tested experimentally in the EAST radiation field. The test results showed that the time resolution of NFM was improved to 1 ms, and the dynamic range of the neutron counts rate was expanded to more than $$10^{6}$$ 10 6 counts per second. The Campbelling mode was calibrated using a multipoint average linear fitting method; subsequently, the fitting coefficient reached 0.9911. Therefore, the newly developed pulse signal acquisition and processing system ensures that the NFM system meets the requirements of high-parameter experiments conducted on EAST more effectively.

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"Automated Test System for Test and Evaluation of C-Band Transmitter Packages for Geosat Spacecrafts." International Journal of Recent Technology and Engineering 8, no. 2 (July 30, 2019): 4591–96. http://dx.doi.org/10.35940/ijrte.b3350.078219.

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The aim of this paper is to develop an Automated Test System (ATS) for the Test and Evaluation of C-Band Transmitter packages for GEOSAT Space crafts using Virtual Instrumentation. Efficiency, coverage, quality and accuracy for the test and evaluation of Device Under Test (DUT) can be increased by Automated Testing. Minimizing the errors anticipated with manual intervention. Automated Test System using Virtual instrumentation (VI) combines rapid development software and modular, flexible hardware to create user-defined test systems. Here Modular PXI (Peripheral component interface Extensions for Instrumentation) instruments from National Instruments are used with NI-LabVIEW software for realizing the ATS. For characterizing the C-Band Transmitter, Spectrum analyzer & Digital Multimeter (DMM) is configured in PXI form-factor and the Power supply is controlled through GPIB (General Purpose Interface Bus) bus. The complete software is developed using NI LabVIEW which takes care of configuring the test condition and analyzing the DUT performance. The user friendly GUI well takes care of user interaction to the ATS.

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"Geotest expands PXI digital product line with two new high-performance digital instruments." Microelectronics International 28, no. 1 (January 25, 2011). http://dx.doi.org/10.1108/mi.2011.21828aad.004.

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G, Dhivyasri, Flavia Princess Nesamani I, Manikandan M, Vijay Kumar Varatharan V, Seenuva samurthi, and Chandran V. "Impact of Methyl Cellulose Surfactant in Uniform Dispersion of Carbon Nanotube Suspension." Innovations in Information and Communication Technology Series, December 30, 2020, 308–10. http://dx.doi.org/10.46532/978-81-950008-1-4_066.

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In this paper, experimental synthesis of uniform dispersion of carbon nanotube using four different surfactants have been presented. Carboxy Methyl Cellulose sample is a better surfactant to disperse CNT in an aqueous solution rather than in organic solutions. The uniformly dispersed sample is coated on silicon substrate and the surface morphology is studied using AFM and SEM and I-V characteristics are studied for the effective sample using PXI 4110 slot of National Instruments.

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G, Dhivyasri, Flavia Princess Nesamani I, Manikandan M, Vijay Kumar Varatharan V, Seenuva samurthi, and Chandran V. "Impact of Methyl Cellulose Surfactant in Uniform Dispersion of Carbon Nanotube Suspension." Innovations in Information and Communication Technology Series, December 30, 2020, 308–10. http://dx.doi.org/10.46532/978-81-950008-1-4_066.

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In this paper, experimental synthesis of uniform dispersion of carbon nanotube using four different surfactants have been presented. Carboxy Methyl Cellulose sample is a better surfactant to disperse CNT in an aqueous solution rather than in organic solutions. The uniformly dispersed sample is coated on silicon substrate and the surface morphology is studied using AFM and SEM and I-V characteristics are studied for the effective sample using PXI 4110 slot of National Instruments.

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Garin, Evgeniy N., Vasiliy N. Ratushnyak, Andrey B. Gladyshev, and Dmitriy I. Smirnov. "Software and Hardware Simulation of Radar System Signals of the Vertical Sounding." Journal of Siberian Federal University. Engineering & Technologies, May 2020, 370–78. http://dx.doi.org/10.17516/1999-494x-0229.

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The article deals with the main requirements for the structure of radar signals, the features of their formation, and the software and hardware radar signal complex of the vertical atmospheric sounding. The hardware radar implementation based on the PXI modules made by National Instruments and Keysight is given. The software LabVIEW model performing formation and generation of radar pulses with different types of phase and amplitude phase modulation and their spectral analysis are presented

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Joseph, Jayaraj, and V. Jayashankar. "A Virtual Instrument for Automated Measurement of Arterial Compliance." Journal of Medical Devices 4, no. 4 (December 1, 2010). http://dx.doi.org/10.1115/1.4002493.

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Measurement of arterial distensibility is very important in cardiovascular diagnosis for early detection of coronary heart disease and possible prediction of future cardiac events. Conventionally, B-mode ultrasound imaging systems have been used along with expensive vessel wall tracking systems for estimation of arterial distension and calculation of various estimates of compliance. We present a simple instrument for noninvasive in vivo evaluation of arterial compliance using a single element ultrasound transducer. The measurement methodology is initially validated using a proof of concept pilot experiment using a commercial ultrasound pulser-receiver. A prototype system is then developed around a PXI chassis using LABVIEW software. The virtual instrument employs a dynamic threshold algorithm to identify the artery walls and then utilizes a correlation based tracking technique to estimate arterial distension. The end-diastolic echo signals are averaged to reduce error in the automated diameter measurement process. The instrument allows automated measurement of the various measures of arterial compliance with minimal operator intervention. The performance of the virtual instrument was first analyzed using simulated data sets to establish the maximum measurement accuracy achievable under different input signal to noise ratio (SNR) levels. The system could measure distension with accuracy better than 10 μm for positive SNR. The measurement error in diameter was less than 1%. The system was then thoroughly evaluated by the experiments conducted on phantom models of the carotid artery and the accuracy and resolution were found to meet the requirements of the application. Measurements performed on human volunteers indicate that the instrument can measure arterial distension with a precision better than 5%. The end-diastolic arterial diameter can be measured with a precision better than 2% and an accuracy of 1%. The measurement system could lead to the development of small, portable, and inexpensive equipment for estimation of arterial compliance suitable in mass screening of “at risk” patients. The automated compliance measurement algorithm implemented in the instrument requires minimal operator input. The instrument could pave the way for dedicated systems for arterial compliance evaluation targeted at the general medical practitioner who has little or no expertise in vascular ultrasonography.

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Journal articles on the topic 'PXIe instrument'

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