Journal articles: 'Pressure transducer'

1

Banaszak, David, and Michael Camden. "Static and Dynamic Calibration of Pressure Transducers at Elevated Temperatures." Journal of the IEST 38, no. 4 (July 31, 1995): 23–30. http://dx.doi.org/10.17764/jiet.2.38.4.u61473348th04987.

Full text

Abstract:

The Air Force conducts tests requiring measurement of high dynamic pressures in high-temperature environments. Such tests require measurement of dynamic pressures created by jet engines, turbulent air-flow along hot areas of aircraft structures, and acoustic levels in Air Force test chambers such as acoustic chambers, wind tunnels, and engine test stands. Several commercial industries also have requirements for high-temperature dynamic measurements. To address these Air Force needs for dynamic pressure measurements at high temperatures, the Structures Division of the Flight Dynamics Directorate of the Wright Laboratory evaluated dynamic pressure transducers for use in extreme acoustic and thermal environments. Transducer manufacturers were surveyed and three off-the-shelf pressure transducers capable of measuring dynamic pressures at extreme environments were identified. The first model measures up to 194 dB(A) and operates up to 260°C (500°F). This model has an extended operating temperature up to 1649°C (3000 °F) when used with a water-cooled jacket. The second model is an air-cooled transducer advertised to operate up to 593°C (1100°F). The third model is a water-cooled transducer advertised to operate up to 2802°C (5075 °F). Two of the models have low sensitivity and thus require more output amplification. These two models are also larger and require larger mounting holes. The transducers were evaluated at various static pressures, acoustic levels, and temperatures. This paper describes the procedures used to calibrate these transducers up to a 172-dB sound pressure level (SPL) and a temperature of 732°C (1350°F). The results for these transducers are summarized for different static pressures, operating SPLs, and temperatures.

APA, Harvard, Vancouver, ISO, and other styles

2

Feeney, Andrew, Lei Kang, William E. Somerset, and Steve Dixon. "The Influence of Air Pressure on the Dynamics of Flexural Ultrasonic Transducers." Sensors 19, no. 21 (October 30, 2019): 4710. http://dx.doi.org/10.3390/s19214710.

Full text

Abstract:

The flexural ultrasonic transducer comprises a piezoelectric ceramic disc bonded to a membrane. The vibrations of the piezoelectric ceramic disc induce flexural modes in the membrane, producing ultrasound waves. The transducer is principally utilized for proximity or flow measurement, designed for operation at atmospheric pressure conditions. However, there is rapidly growing industrial demand for the flexural ultrasonic transducer in applications including water metering or in petrochemical plants where the pressure levels of the gas or liquid environment can approach 100 bar. In this study, characterization methods including electrical impedance analysis and pitch-catch ultrasound measurement are employed to demonstrate the dynamic performance of flexural ultrasonic transducers in air at elevated pressures approaching 100 bar. Measurement principles are discussed, in addition to modifications to the transducer design for ensuring resilience at increasing air pressure levels. The results highlight the importance of controlling the parameters of the measurement environment and show that although the conventional design of flexural ultrasonic transducer can exhibit functionality towards 100 bar, its dynamic performance is unsuitable for accurate ultrasound measurement. It is anticipated that this research will initiate new developments in ultrasound measurement systems for fluid environments at elevated pressures.

APA, Harvard, Vancouver, ISO, and other styles

3

Liu, Z., and C. W. Higgins. "Does temperature affect the accuracy of vented pressure transducer in fine-scale water level measurement?" Geoscientific Instrumentation, Methods and Data Systems Discussions 4, no. 2 (September 29, 2014): 533–61. http://dx.doi.org/10.5194/gid-4-533-2014.

Full text

Abstract:

Abstract. Submersible pressure transducers have been utilized for collecting water level data since early 1960s. Together with a digital datalogger, it is a convenient way to record water level fluctuations for long-term monitoring. Despite the widely use of pressure transducers for water level monitoring, little has been reported for their accuracy and performance under field conditions. The effect of temperature fluctuations on the output of vented pressure transducers were discussed in this study. The pressure transducer was tested under both laboratory and field conditions. The results of this study indicate that temperature fluctuation has a strong effect on the transducer output. Rapid changes in temperature introduce noise and fluctuations in the water level readings under a constant hydraulic head while the absolute temperature is also related to sensor errors. The former is attributed to venting and the latter is attributed to temperature compensation effect in the strain gauges. Individual pressure transducers responded differently to the thermal fluctuations in the same testing environment. In the field of surface hydrology, especially when monitoring fine-scale water level fluctuations, ignoring or failing to compensate for the temperature effect can introduce considerable error into pressure transducer readings. It is recommended that a performance test for the pressure transducer is conducted before field deployment.

APA, Harvard, Vancouver, ISO, and other styles

4

Liu, Z., and C. W. Higgins. "Does temperature affect the accuracy of vented pressure transducer in fine-scale water level measurement?" Geoscientific Instrumentation, Methods and Data Systems 4, no. 1 (March 3, 2015): 65–73. http://dx.doi.org/10.5194/gi-4-65-2015.

Full text

Abstract:

Abstract. Submersible pressure transducers have been utilized for collecting water level data since the early 1960s. Together with a digital data logger, it is a convenient way to record water level fluctuations for long-term monitoring. Despite the wide use of pressure transducers for water level monitoring, little has been reported regarding their accuracy and performance under field conditions. The effects of temperature fluctuations on the output of vented pressure transducers were considered in this study. The pressure transducers were tested under both laboratory and field conditions. The results of this study indicate that temperature fluctuation has a strong effect on the transducer output. Rapid changes in temperature introduce noise and fluctuations in the water level readings under a constant hydraulic head while the absolute temperature is also related to sensor errors. The former is attributed to venting and the latter is attributed to temperature compensation effects in the strain gauges. Individual pressure transducers responded differently to the thermal fluctuations in the same testing environment. In the field of surface hydrology, especially when monitoring fine-scale water level fluctuations, ignoring or failing to compensate for the temperature effect can introduce considerable error into pressure transducer readings. It is recommended that a performance test for the pressure transducer is conducted before field deployment.

APA, Harvard, Vancouver, ISO, and other styles

5

Ott, P., A. Bo¨lcs, and T. H. Fransson. "Experimental and Numerical Study of the Time-Dependent Pressure Response of a Shock Wave Oscillating in a Nozzle." Journal of Turbomachinery 117, no. 1 (January 1, 1995): 106–14. http://dx.doi.org/10.1115/1.2835625.

Full text

Abstract:

Investigations of flutter in transonic turbine cascades have shown that the movement of unsteady normal shocks has an important effect on the excitation of blades. In order to predict this phenomenon correctly, detailed studies concerning the response of unsteady blade pressures versus different parameters of an oscillating shock wave should be performed, if possible isolated from other flow effects in cascades. In the present investigation the correlation between an oscillating normal shock wave and the response of wall-mounted time-dependent pressure transducers was studied experimentally in a nozzle with fluctuating back pressure. Excitation frequencies between 0 Hz and 180 Hz were investigated. For the measurements, various measuring techniques were employed. The determination of the unsteady shock position was made by a line scan camera using the Schlieren flow visualization technique. This allowed the simultaneous use of unsteady pressure transducers to evaluate the behavior of the pressure under the moving shock. A numerical code, based on the fully unsteady Euler equations in conservative form, was developed to simulate the behavior of the shock and the pressures. The main results of this work were: (1) The boundary layer over an unsteady pressure transducer has a quasi-steady behavior with respect to the phase lag. The pressure amplitude depends on the frequency of the back pressure. (2) For the geometry investigated the shock amplitude decreased with increasing excitation frequency. (3) The pressure transducer sensed the arriving shock before the shock had reached the position of the pressure transducer. (4) The computed unsteady phenomena agree well with the results of the measurements.

APA, Harvard, Vancouver, ISO, and other styles

6

Zhao, Guozhu, Kaibo Shi, and Shouming Zhong. "Research on Array Structures of Acoustic Directional Transducer." Mathematical Problems in Engineering 2021 (January 2, 2021): 1–5. http://dx.doi.org/10.1155/2021/6670277.

Full text

Abstract:

This paper focuses on the directivity design of array structures of acoustic directional transducers. Based on Huygens principles, the directivity formula of transducer arrays under random distribution in xyz space is derived when the circular piston transducers are used as the array element, which is used to analyze the directivity and acoustic pressure of conical transducer arrangements. In addition, a practical approach to analyze the directivity and acoustic pressure of transducer arrays under random arrangements is proposed. Findings. The conical transducer arrays show side lobes at higher frequency. Below the frequency of 2 kHz, array directivity shows rapid changes. Above the frequency of 2 kHz, array directivity varies slowly with frequency. Besides, the beam width is Θ − 3 dB ≤ 29.85 ° .

APA, Harvard, Vancouver, ISO, and other styles

7

Wang, Zi Ping, and Ying Luo. "Focusing Actuating Performance of OPFC Phased Array Transducer Based on DPSM." Key Engineering Materials 609-610 (April 2014): 1299–304. http://dx.doi.org/10.4028/www.scientific.net/kem.609-610.1299.

Full text

Abstract:

As a new functional composite material, Orthotropic Piezoelectric Fiber Composite (OPFC) may be developed conveniently actuators and sensors. By constructing multi-element linear array, the phased array transducers can generate special directional strong actuator power and high sensitivity. The advantage of the transducers is that no mechanical movement is needed to scan an object. Focusing beam is obtained simply only by adjusting a parabolic time delay. The DPSM (distributed point source method) is used to model the ultrasonic field by OPFC linear array transducer. Using this approach, beam directivity and pressure distributions are studied to predict the behavior of focusing as compared to current formulation of traditional transducer. The interaction effect of two OPFC phased array transducers is also modeled in the same medium. Which shows the pressure beam produced by the OPFC array transducer is narrower or more collimated than that produced by the conventional transducer at different angles.

APA, Harvard, Vancouver, ISO, and other styles

8

Iizumi, Hideaki, Hiroaki Kajikawa, and Tokihiko Kobata. "Calibration values uninfluenced by the kind of pressure medium and the setting posture for quartz Bourdon-type pressure transducers." ACTA IMEKO 8, no. 3 (September 30, 2019): 25. http://dx.doi.org/10.21014/acta_imeko.v8i3.666.

Full text

Abstract:

The effects of the kind of gas medium and the setting posture on the calibration values of a quartz Bourdon-type pressure transducer mounted vertically are evaluated in this study. The transducer, at the upward and downward settings, was calibrated both with nitrogen and with helium. The difference between the calibration values of the transducer with nitrogen at the upward and downward settings was about 7.0 kPa at 100 MPa. At the same setting posture, the maximum difference in the calibration values between nitrogen and helium was 3.4 kPa. For precise pressure measurement, it is recommended that the transducers are used with the same pressure medium and the same setting posture with which they were calibrated. The methods of reducing the effects of both the kind of gas medium and the setting posture are discussed. The average of two calibration values at the upward setting and at the downward setting was not affected by the kind of gas medium. When the sensing elements of two pressure transducers arranged in point symmetry with each other, the average values of two transducers were independent of both the kind of gas medium and the setting posture.

APA, Harvard, Vancouver, ISO, and other styles

9

Lin, Hank, and Chih‐Ming Ho. "Optical pressure transducer." Review of Scientific Instruments 64, no. 7 (July 1993): 1999–2002. http://dx.doi.org/10.1063/1.1143989.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Robertson, Bob K. "High pressure transducer." Journal of the Acoustical Society of America 89, no. 1 (January 1991): 494. http://dx.doi.org/10.1121/1.400399.

Full text

APA, Harvard, Vancouver, ISO, and other styles

11

Katkov, A. N., V. N. Novikov, and B. V. Chuvykin. "Digital pressure transducer." Measurement Techniques 54, no. 4 (July 2011): 428–33. http://dx.doi.org/10.1007/s11018-011-9743-7.

Full text

APA, Harvard, Vancouver, ISO, and other styles

12

Kazaryan, A. A., and G. P. Groshev. "Universal pressure transducer." Measurement Techniques 51, no. 3 (March 2008): 269–75. http://dx.doi.org/10.1007/s11018-008-9035-z.

Full text

APA, Harvard, Vancouver, ISO, and other styles

13

Könemann, Jens. "Evaluation of supplementary comparison EURAMAT.M.P-S14 in the range 50 MPa to 1 GPa of hydraulic gauge pressure." ACTA IMEKO 7, no. 1 (April 1, 2018): 76. http://dx.doi.org/10.21014/acta_imeko.v7i1.495.

Full text

Abstract:

In this work, we present a mathematical procedure to evaluate a hydraulic gauge pressure comparison in the range to 1 GPa piloted by PTB and using a transfer standard consisting of two series of modern high-pressure transducers, i.e. eight pressure transducers in total. This set of parallel arranged transducers should ensure reliability of the transfer standard at high pressures and provide rich data for testing the performance of modern high-pressure transducers. The analysis of the comparison results was based on the evaluation of the individual measurement deviations of these transducers with respect to the laboratory standards, whereas the corresponding comparison reference values and their uncertainty were determined separately at each pressure point and pressure transducer. All these results were summarized to derive the degree of equivalence for each laboratory at each pressure which was found for all laboratories to be consistent at almost all pressures.

APA, Harvard, Vancouver, ISO, and other styles

14

Conger, Rand N., and B. R. Ramaprian. "Correcting for Response Lag in Unsteady Pressure Measurements in Water." Journal of Fluids Engineering 115, no. 4 (December 1, 1993): 676–79. http://dx.doi.org/10.1115/1.2910198.

Full text

Abstract:

There is not much information available on the use of diaphragm-type pressure transducers for the measurement of unsteady pressures in liquids. A procedure for measuring the dynamic response of a pressure transducer in such applications and correcting for its inadequate response is discussed in this report. An example of the successful use of this method to determine unsteady surface pressures on a pitching airfoil in a water channel is presented.

APA, Harvard, Vancouver, ISO, and other styles

15

Rollins, Kyle M., J. Dusty Lane, Emily Dibb, Scott A. Ashford, and A. Gray Mullins. "Pore Pressure Measurement in Blast-Induced Liquefaction Experiments." Transportation Research Record: Journal of the Transportation Research Board 1936, no. 1 (January 2005): 210–20. http://dx.doi.org/10.1177/0361198105193600124.

Full text

Abstract:

Blast-induced liquefaction experiments have been conducted at a number of test sites to evaluate lateral foundation resistance and soil improvement techniques. Tests can be constructed at full scale without waiting for an earthquake. In this extreme environment, pore pressure transducers must survive transient blast pressures of 41.4 MPa (6,000 psi) yet have enough resolution to measure residual pore pressures of ±0.69 kPa (0.1 psi). Three transducer types were evaluated under these demanding conditions, and the piezoresistive transducer was found to be the most robust. These sensors were repeatedly subjected to extreme blast pressures and vibration, but they still provided accurate time histories of residual pore pressure. Although these piezometers are more expensive than other types, installation techniques allowed them to be recovered and reused in subsequent tests and thus reduced overall costs. These pore pressure sensors make it possible to define the extent of the liquefied zone during blast liquefaction experiments and to understand the soil behavior during cyclic loading of deep foundations.

APA, Harvard, Vancouver, ISO, and other styles

16

Knott, Andy J., and Ian A. Robinson. "Dynamic characterisation of pressure transducers using shock tube methods." Transactions of the Institute of Measurement and Control 42, no. 4 (October 21, 2019): 743–48. http://dx.doi.org/10.1177/0142331219880700.

Full text

Abstract:

This paper describes the characterisation of the dynamic response of a range of pressure transducer systems. The transducers were subjected to virtually instantaneous pressure step inputs in the National Physical Laboratory’s shock tube facilities. The magnitudes of these pressure steps were derived from ideal gas theory, with prior commissioning tests having been performed to demonstrate the theory’s validity in this application. The results demonstrate a significant variation in response obtained from various combinations of transducer, instrumentation settings, and mounting arrangement.

APA, Harvard, Vancouver, ISO, and other styles

17

PEI, DA LIE, and YONGRAE ROH. "OPTIMAL DESIGN OF A 1-3 PIEZOCOMPOSITE TONPILZ TRANSDUCER BY MEANS OF THE FINITE ELEMENT METHOD." Modern Physics Letters B 22, no. 11 (May 10, 2008): 1087–92. http://dx.doi.org/10.1142/s0217984908015887.

Full text

Abstract:

Underwater Tonpilz transducer is designed with 1-3 piezocomposite materials to overcome the problems with conventional piezoceramic transducers. With the FEM, the variation of the resonance frequency, bandwidth and sound pressure of the transducer are analyzed in relation to the structural variables of the transducer. Through statistical multiple regression analysis of the results, functional forms of the transducer performance are derived in terms of design variables. By applying the constrained optimization technique, SQP-PD, to the derived functions, the optimal structure of the transducer is determined that can provide the highest sound pressure level at a given resonant frequency over a pre-determined frequency range. The validity of the optimized results is confirmed through comparison of the optimal performance with that of the FEA.

APA, Harvard, Vancouver, ISO, and other styles

18

Mosland, Eivind N., Jan Kocbach, and Per Lunde. "Errors using the spatially averaged free-field pressure approximation for description of the receiving properties of piezoelectric transducers." Journal of the Acoustical Society of America 152, no. 4 (October 2022): A227. http://dx.doi.org/10.1121/10.0016092.

Full text

Abstract:

In modelling of ultrasonic measurement systems and calculation of diffraction corrections for such systems, it is often assumed that the spatially averaged free-field pressure over the front surface of a piezoelectric transducer, ⟨ p⟩, can be used to calculate its voltage output. It is of interest to investigate whether errors due to this ⟨ p⟩-approximation are acceptable for piezoelectric transducers applied in high-precision ultrasonic measurements in fluids. 3D-axisymmetric finite element (FE) modelling is used to investigate such errors in a transmit-receive measurement setup employing two identical transducers. The approximate output voltage is found by Vout = ⟨ p⟩ MV and compared to the output voltage from FE modelling of the transmitter-medium-receiver system, Vout,ref , using the appropriate boundary conditions at the two transducers. MV is the open-circuit free-field receiving voltage sensitivity of the receiver for normally incident plane wavefronts, calculated assuming spherical reciprocity. Two examples of piezoelectric transducer pairs are studied, operated in the frequency range of their lower radial modes. It is shown that the ⟨ p⟩-approximation may introduce notable deviations between V out and Vout,ref , of up to approximately 40° for the phase angle and 2 dB for the magnitude. The deviations depend on the fluid medium, separation distance, frequency, and the transducer’s construction and vibrational characteristics.

APA, Harvard, Vancouver, ISO, and other styles

19

M R, Subash Chandrabose, Shan Victor Pereira, Jayakumar B, and Ebenezer D. D. "Metal Ceramic Segmented Ring Transducer under Deep Submergence Conditions." Defence Science Journal 67, no. 6 (November 6, 2017): 612. http://dx.doi.org/10.14429/dsj.67.11201.

Full text

Abstract:

Segmented ring transducers are widely used for low frequency, broadband, deep submergence applications. These transducers can be made out of piezoceramic wedges or slabs and metallic wedges. Higher diameter, low frequency transducers are generally made out of piezoceramic slabs and metal wedges due to ease of manufacture and low cost. In this paper, metal ceramic segmented ring transducers are modelled using ATILA, a finite element software for the design of underwater transducers. Transducer variants were modelled with different wedge and piezoceramic materials. Transducers modelled were manufactured, assembled and tested. Various stages of manufacture like piezoceramic stacking, transducer assembly, pre-stressing with fibre winding, and encapsulation are explained. Acoustic performances of the transducers manufactured were measured in an open tank and inside a pressurised vessel from 10 bar to 70 bar. Performance parameters like resonance frequency, transmitting voltage response and directivity were measured. Results indicate that the transducer has usable bandwidth of about two octaves and stable response. One of the transducers was also tested in a high pressure test facility at 600 bar to check its pressure withstanding capability.

APA, Harvard, Vancouver, ISO, and other styles

20

Morgalla, Matthias Hubert, Làszlo Krasznai, Klaus Dietz, Holger Mettenleiter, Martin Deininger, and Ernst Heinrich Grote. "Methods of experimental and clinical assessment of the relative measurement accuracy of an intracranial pressure transducer." Journal of Neurosurgery 95, no. 3 (September 2001): 529–32. http://dx.doi.org/10.3171/jns.2001.95.3.0529.

Full text

Abstract:

✓ The assessment of the actual measurement accuracy of an intracranial pressure (ICP) transducer is imperative but still very difficult in practice. The authors tested the Codman MicroSensor ICP transducer experimentally. Additionally, a bedside test for assessment of measurement accuracy was used before and after clinical monitoring. For laboratory testing, seven new transducers were examined for measurement accuracy at increasing pressures ranging from 0 to 75 mm Hg. Drift was evaluated for 10 days at six different pressure levels ranging from 0 to 50 mm Hg. Temperature drift was assessed over a temperature range from 20 to 45°C. The percentage absolute difference was used in the assessment of measurement accuracy. For clinical testing, measurement accuracy was assessed intraoperatively just before the insertion of the transducer and in an open water bath after its explantation, at 10 cm H2O both times. The maximum percentage absolute difference was 9% at a pressure of 10 mm Hg, and declined toward 2.3% at a pressure of 75 mm Hg. The maximum drift over 10 days was −4 mm Hg. Within the range of 30 to 40°C, temperature drift was negligible. Over a period of 2 years, between June 1997 and June 1999, 40 ICP transducers were implanted in 35 patients by one surgeon. Of these devices, a malfunction was detected in two of them by testing them in a water bath before insertion. Experimental and clinical results indicate that this miniature strain-gauge transducer measures accurately; however, control readings for the probe by means of measurement in an open water bath just before insertion are strongly recommended.

APA, Harvard, Vancouver, ISO, and other styles

21

Chu, J. Y., D. Skrzypiec, P. Pollintine, and M. A. Adams. "Can compressive stress be measured experimentally within the annulus fibrosus of degenerated intervertebral discs?" Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine 222, no. 2 (February 1, 2008): 161–70. http://dx.doi.org/10.1243/09544119jeim240.

Full text

Abstract:

The aims were to assess the ability of a pressure transducer to measure compressive stress within the annulus fibrosus of degenerated intervertebral discs. Measurements could help to explain the mechanisms of disc failure and low back pain. The methods used were as follows. Thirteen full-depth cores of annulus, 7 mm in diameter, were removed from the middle and outer annuli of two severely degenerated human discs and constrained within a metal cylinder. Then static compressive forces were applied by a planeended metal indenter of diameter 6.8 mm, while a strain-gauged pressure transducer, side mounted in a needle of diameter 0.9 mm and calibrated in saline, was pulled through the issue. The transducer output was converted into stress, and the average measured stress was compared with the nominal applied stress. Measurements were repeated at up to 21 load levels, with the transducer oriented vertically and horizontally. The results showed that the measured and applied stress were linearly related (average r2=0.98) with a mean gradient (calibration factor) of 0.98 (vertical stress) and 0.92 (horizontal stress). Gradients ranged between 1.28 and 0.73. Damaged transducers grossly under-recorded ‘stress’ even though their output remained proportional to applied load. It was concluded that pressure transducers can measure compressive stress inside a degenerated human annulus. The tissue is sufficiently deformable to allow efficient coupling of stress between the matrix and transducer membrane. Damage to the transducer can give misleading results.

APA, Harvard, Vancouver, ISO, and other styles

22

Alverson, G., D. Garelick, and E. Gobby. "An inexpensive pressure transducer." American Journal of Physics 53, no. 11 (November 1985): 1108. http://dx.doi.org/10.1119/1.14048.

Full text

APA, Harvard, Vancouver, ISO, and other styles

23

Hill, Kenneth D. "Pressure Transducer Hysteresis Modeling." IEEE Transactions on Instrumentation and Measurement IM-34, no. 3 (September 1985): 471–73. http://dx.doi.org/10.1109/tim.1985.4315375.

Full text

APA, Harvard, Vancouver, ISO, and other styles

24

Lewis, C. P., T. G. Hesketh, M. Kraft, and M. Florescu. "A digital pressure transducer." Transactions of the Institute of Measurement and Control 20, no. 2 (April 1998): 98–102. http://dx.doi.org/10.1177/014233129802000207.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

Mohd Asry, Anis Maisarah, Farahiyah Mustafa, Sy Yi Sim, Maizul Ishak, and Aznizam Mohamad. "Study on footstep power generation using piezoelectric tile." Indonesian Journal of Electrical Engineering and Computer Science 15, no. 2 (August 1, 2019): 593. http://dx.doi.org/10.11591/ijeecs.v15.i2.pp593-599.

Full text

Abstract:

Electrical energy is important and had been demand increasingly. A lot of energy resources have been wasted and exhausted. An alternative way to generate electricity by using a population of human had been discovered When walking, the vibration that generates between the surface and the footstep is wasted. By utilizing this wasted energy, the electrical energy can be generated and fulfill the demand. The transducer that use to detect the vibration is a piezoelectric transducer. This transducer converts the mechanical energy into electrical energy. When the pressure from the footstep is applied to the piezoelectric transducer, it will convert the pressure or the force into the electrical energy. The piezoelectric transducer is connected in series-parallel coonection. Then, it is placed on the tile that been made from wood as a model for footstep tile to give pressure to the piezoelectric transducers. This tile can be placed in the crowded area, walking pavement or exercise instruments. The electric energy that generates from this piezoelectric tile can be power up low power appliances.

APA, Harvard, Vancouver, ISO, and other styles

26

Wang, Wenjie, Weihao Shi, Peter Thomas, and Mingsui Yang. "Design and Analysis of Two Piezoelectric Cymbal Transducers with Metal Ring and Add Mass." Sensors 19, no. 1 (January 2, 2019): 137. http://dx.doi.org/10.3390/s19010137.

Full text

Abstract:

Based on traditional sandwich structure, two piezoelectric transducers were designed to meet the strict underwater application backgrounds such as high pressure, corrosion resistance, and high strength. Both transducers integrated most of previous researches while one transducer has a multilayer cavity structure which is different from the other structure and previous transducer structures. After a detailed simulation analysis of every structural parameter, key parameters were pointed out to have an obvious influence on its performance. Then, two models were constructed and compared with chosen sets of geometry parameters and manufacturing process, which can also provide a reference for low-frequency transducer design. The simulation results and experimental results of our transducers show a good consistency which indicates the cavity structure can reduce the resonance frequency.

APA, Harvard, Vancouver, ISO, and other styles

27

Azooz, R. H., and M. A. Arshad. "Laboratory calibration of pressure transducer-tensiometer system for hydraulic studies." Canadian Journal of Soil Science 74, no. 3 (August 1, 1994): 315–19. http://dx.doi.org/10.4141/cjss94-044.

Full text

Abstract:

Pressure transducer-tensiometer (PTT) systems can be used to continuously monitor soil pore water pressure and the hydraulic gradient distribution in a field, and under laboratory conditions over relatively short time intervals. A reliable laboratory calibration of a PTT system can determine the effects of temperature fluctuations on output readings in the field. Laboratory calibrations of 20 PTTs were conducted under constant pressures of 0, − 25, − 50 and − 75 kPa and constant temperatures of 5, 15, 25 and 48 °C. Twenty Bourdon gauge tensiometers (BGTs) and pressure transducers (PTs) were also calibrated to check changes in the sensitivity and effectiveness of the PTT system, when the Bourdon gauge of the tensiometer is replaced by a PT. Readings of all the three systems revealed that pressure values gradually declined with an increase in temperature. With a temperature change from 5 to 48 °C, the pressure values at constant pressures of 0, − 25, − 50 and − 75 kPa decreased by 0, 3.7, 4.1 and 4.5 kPa for the BGT; 2.05, 2.16, 2.23 and 2.44 kPa for PT and 2.53, 2.87, 2.88 and 3.17 kPa for PTT. As the influence of temperature on the calibration curve of the PTT and PT systems was different, it is recommended that the complete PTT system should be calibrated in the laboratory to adjust the output readings to the anticipated temperature in the field. Key words: Tensiometer, tensiometer-pressure transducer, soil pore water pressure, hydraulic gradient

APA, Harvard, Vancouver, ISO, and other styles

28

Khandelwal, Gaurav Kumar. "Footstep Power Generation System." International Journal for Research in Applied Science and Engineering Technology 10, no. 6 (June 30, 2022): 1960–63. http://dx.doi.org/10.22214/ijraset.2022.44204.

Full text

Abstract:

Abstract: We require energy for our day-to-day activities. There are numerous traditional energy-producing methods, but they are rapidly decreasing, thus a non-conventional energy system is critical to our nation at this time. The purpose of this study is to demonstrate how individuals may generate electricity by walking on the floor. Piezoelectricity is recommended as an alternative energy source in this research. The goal is to discover a pollution-free energy source as well as to use and maximize the energy that is now being squandered. A piezoelectric transducer is the type of transducer used to detect vibrations. The mechanical energy is converted into electrical energy by this transducer. When the pressure from a footstep is delivered to a piezoelectric transducer, the pressure or force is converted into electrical energy. A series-parallel connection is used to connect the piezoelectric transducer. It is then put on a wooden tile as a model for a footstep tile to apply pressure to the piezoelectric transducers. This tile may be used in a congested location, on a walking path, or workout equipment. Low-power appliances can be powered by the electric energy generated by this piezoelectric tile.

APA, Harvard, Vancouver, ISO, and other styles

29

Kamble, Varsha Anil. "Effect of Geometrical Parameters On Sensitivity And Volume Of Dual Octal Ring." Journal of University of Shanghai for Science and Technology 23, no. 11 (November 2, 2021): 776–90. http://dx.doi.org/10.51201/jusst/21/11926.

Full text

Abstract:

Force transducer is one of the load cell which is used to measure force or weight, pressure etc. various types of transducers are manufacturing for various applications. But most of strain gauge type of transducer is used. In current research, optimization of octagonal type of force transducer design is carried out by maximizing sensitivity and minimizing the volume. Force transducer is analyze with the help of finite element method and find the critical parameters, its effect also as sensitivity and volume. Response surface methodology is used for experimental set up. For performance of all parameters analysis of variance is carried out and multi-objective optimization is also performed.

APA, Harvard, Vancouver, ISO, and other styles

30

Kim, Howuk, and Xiaoning Jiang. "Numerical Study of a Miniaturized, 1–3 Piezoelectric Composite Focused Ultrasound Transducer." Applied Sciences 13, no. 1 (January 2, 2023): 615. http://dx.doi.org/10.3390/app13010615.

Full text

Abstract:

This study aimed to develop an optimal methodology for the design of a miniaturized, 1–3 piezoelectric composite focused ultrasound transducer. Miniaturized focused ultrasound (FUS) devices, generally guided through catheters, have received considerable attention in the biomedical and ultrasound fields as they can overcome the technical restrictions of typical FUS transducers. However, miniaturized transducers cannot readily generate a high acoustic intensity because of their small aperture sizes and the vibration mode coupling. As such, 1–3 composite transducers, having a high electromechanical coupling and efficient vibration directivity, break through the current technical restrictions. However, the systematic methodology for designing miniaturized FUS transducers has not been thoroughly discussed so far. Therefore, in this study, we designed 1–3 piezoelectric composite transducers using analytical and numerical methods. Specifically, extensive parametric studies were performed through finite element analysis under the coupled field with piezoelectricity, structural vibration, and acoustic pressure. The simulation results confirmed that the optimal design of the 1–3 composite type transducer produces much higher (>160%) acoustic pressure output at the focal point than the single-phase device. Furthermore, the array type of the interstitial transducer was predicted to produce an unprecedented acoustic intensity of approximately 188 W/cm2 under a short duty cycle (1%). This study will provide valuable technical methodology for the development of interstitial, 1–3 composite FUS transducers and the selection of optimal design parameters.

APA, Harvard, Vancouver, ISO, and other styles

31

Li, Tao, Jan Ma, S. Dinesh Kumar, and Adrian F. Low. "Development of Piezoelectric Ultrasonic Thrombolysis Device for Blood Clot Emulsification." ISRN Materials Science 2012 (May 15, 2012): 1–6. http://dx.doi.org/10.5402/2012/106484.

Full text

Abstract:

Ultrasonic thrombolysis is an effective method to treat blood clot thrombus in a blood vessel. This paper reports an OD 5 mm and an OD 10 mm piezoelectric thrombolysis transducers that vibrate longitudinally and generate a pressure field at the distal vibration tip. Studies of vibration mode, pressure field pattern, and cavitation effect were carried out. The transducers were also tested for blood clot emulsification. The results indicate both transducers are effective. The OD 10 mm transducer with a long transmission wire has shown to provide a strong cavitation effect and work effectively at low frequency, high amplitude, and high power conditions. The OD 5 mm transducer was found to operate effectively under higher frequency, low amplitude, and lower power conditions. The cavitation effect is moderate, which facilitates precision and controls over obtaining a more uniform emulsification result.

APA, Harvard, Vancouver, ISO, and other styles

32

Maralani, Ayden, Levent Beker, and Albert P. Pisano. "Toward Integrated Pressure Sensors for Temperatures up to 600°C." Journal of Microelectronics and Electronic Packaging 13, no. 4 (October 1, 2016): 163–68. http://dx.doi.org/10.4071/imaps.522.

Full text

Abstract:

The main objective of this study is to develop pressure-sensing systems by integrating pressure transducers with the interface circuitry in one package that can withstand harsh environments, particularly high temperatures up to 600°C. To achieve that, both pressure transducer and interface circuitry are individually required to operate and survive up to 600°C with acceptable degrees of reliability. This article reports performance evaluation of fabricated 4H-SiC Junction Field Effect Transistors along with differential pairs for use in the interface circuitry. The test results are very promising and show stable performances from 25°C up to 600°C. Moreover, design, fabrication, and early test (from 25°C up to 100°C) of an SiC-based circular diaphragm-type pressure transducer are also reported.

APA, Harvard, Vancouver, ISO, and other styles

33

Ling, Zhang Wei, Wei Yong Cai, Chao Li, and Wei Can Guo. "An Ultrasonic Rayleigh Wave Transducer and its Application to Nondestructive Pressure Measurement." Applied Mechanics and Materials 742 (March 2015): 11–16. http://dx.doi.org/10.4028/www.scientific.net/amm.742.11.

Full text

Abstract:

An ultrasonic Rayleigh wave transducer was designed for nondestructive pressure measurement in vessels. Using polyimide resin as the wedge material, the Rayleigh wave transducer had two piezoelectric elements which were placed in the same wedge with a certain distance. Variations in pressure and temperature of vessels can affect the velocity of ultrasonic waves, which will affect variations in time delay in receiving of the same Rayleigh wave with the two piezoelectric elements of the designed transducer. Based on the acoustoelasticity principle and considered the effect of temperature, a practical correlation model between the time delay and both the pressure and temperature of vessels was developed. Using an air vessel as a specimen, Rayleigh wave transducers were arranged in the axial direction of the vessel. The results of temperature experiments show that effect of changes in temperature on time delay agree with the theoretical results. With the calculation temperature compensation in pressure experiment, the relationship between the variations in the time delay caused by changes of pressure and the pressure is established. The pressure measurement results show that the measurement model is effective and the maximum absolute error is 0.09 MPa, which could be acceptable in engineering application.

APA, Harvard, Vancouver, ISO, and other styles

34

Takada, Hajime, Daisuke Fujimaki, and Takao Tsuboi. "Measurement of Strong Shock Pressure." Shock and Vibration 4, no. 5-6 (1997): 403–9. http://dx.doi.org/10.1155/1997/684909.

Full text

Abstract:

This paper deals with measurement of a strong shock pressure like an imploding detonation of over 1 GPa which cannot be measured directly with currently available commercial pressure transducers. After the transfer functions of three kinds of materials were measured using a shock tube, Teflon was selected as a shock absorber. As an example of pressure beyond the limit of the pressure transducer, we tried to measure pressure at the center of an imploding detonation. From this measurement, we could estimate the pressure peak of about 1.7 GPa.

APA, Harvard, Vancouver, ISO, and other styles

35

Wang, Ziping, and Ying Luo. "Focusing Modeling of OPFC Linear Array Transducer by Using Distributed Point Source Method." Abstract and Applied Analysis 2014 (2014): 1–11. http://dx.doi.org/10.1155/2014/840748.

Full text

Abstract:

The improvement of ultrasonic phased array detection technology is a major concern of engineering community. Orthotropic piezoelectric fiber composite (OPFC) can be constructed to multielement linear array which may be applied conveniently to actuators and sensors. The phased array transducers can generate special directional strong actuator power and high sensitivity for its orthotropic performance. Focusing beam of the linear phased array transducer is obtained simply only by adjusting a parabolic time delay. In this work, the distributed point source method (DPSM) is used to model the ultrasonic field. DPSM is a newly developed mesh-free numerical technique that has been developed for solving a variety of engineering problems. This work gives the basic theory of this method and solves the problems from the application of new OPFC phased array transducer. Compared with traditional transducer, the interaction effect of two OPFC linear phased array transducers is also modeled in the same medium, which shows that the pressure beam produced by the new transducer is narrower or more collimated than that produced by the conventional transducer at different angles. DPSM can be used to analyze and optimally design the OPFC linear phased array transducer.

APA, Harvard, Vancouver, ISO, and other styles

36

Held-Munzenmaier, D., G. N. Olinger, and L. E. Boerboom. "A sheath for repetitive insertion of high-fidelity micromanometer-tipped catheters." American Journal of Physiology-Heart and Circulatory Physiology 257, no. 4 (October 1, 1989): H1312—H1314. http://dx.doi.org/10.1152/ajpheart.1989.257.4.h1312.

Full text

Abstract:

Implantation of micromanometer-tipped catheters into dogs and other animals for invasive high-fidelity blood pressure measurement is expensive and impractical. We have devised an implantable sheath that allows insertion of the transducer each time the animal is to be studied. This eliminates animal-inflicted damage and the need for multiple transducers if several animals are to be instrumented concurrently. The sheath is coextruded from hard and soft forms of polyurethane to form a soft, flexible, thrombus-resistant tubing with a hard thin inner lining having a low coefficient of friction. This allows chronic implantation of the sheath into the heart and major vessels with minimal trauma, yet enables a transducer to be advanced through a sheath only slightly larger than the transducer itself without the frictional resistance common to other soft tubing. The sheath can be tapered for ease of implantation into vessels or curved to the appropriate angle for implantation into the heart. Our polyurethane sheath is a versatile, convenient, and inexpensive alternative to chronic instrumentation with transducers for high-fidelity pressure measurement.

APA, Harvard, Vancouver, ISO, and other styles

37

Tsypin, B. V., S. A. Zdobnov, and K. E. Utkin. "CORRECTION OF CHARACTERISTICS OF SENSITIVE ELEMENTS PRESSURESENSORS." Izvestiya of Samara Scientific Center of the Russian Academy of Sciences 24, no. 4 (2022): 148–54. http://dx.doi.org/10.37313/1990-5378-2022-24-4-148-154.

Full text

Abstract:

Methods for correcting the nonlinearity and temperature dependence of the conversion function of primary measuring transducers are given. On the example of pressure sensors, the advantages and disadvantages of correcting in the elements of the primary transducer, adjusting only in individual links, and correcting introduced into subsequent elements of the measuring circuit are considered. Options for introducing automatic correction are shown. A classification of methods for correcting the nonlinearity of the transformation function and methods for correcting the temperature error is given. Keywords: primary measuring transducer, pressure sensor, conversion function, measuring circuit, non-linearity error, temperature error, correction.

APA, Harvard, Vancouver, ISO, and other styles

38

Maralani, Ayden, Levent Beker, and Albert P. Pisano. "Towards Integrated Sensors for Environments with Temperatures up to 600 °C." Additional Conferences (Device Packaging, HiTEC, HiTEN, and CICMT) 2016, HiTEC (January 1, 2016): 000051–55. http://dx.doi.org/10.4071/2016-hitec-51.

Full text

Abstract:

Abstract The main objective is to develop sensing systems by integrating transducers such as pressure sensing elements with the interface circuitry in one package that can withstand harsh environments, particularly high temperatures up to 600 °C. To achieve that, both pressure transducer and interface circuitry are individually required to operate and survive up to 600 °C with acceptable degrees of reliability. This paper reports performance evaluation of fabricated 4H-SiC JFETs along with differential pairs for use in the interface circuitry. The test results are very promising and show stable performances from 25 °C up to 600 °C. Moreover, design, fabrication, and early test of a SiC based circular diaphragm type pressure transducer is also reported.

APA, Harvard, Vancouver, ISO, and other styles

39

AFANASYEV, S. A., M. S. AFANASYEV, V. S. FESHCHENKO, S. A. LVOV, and A. O. ZHUKOV. "DESIGN DIAMOND SEMICONDUCTOR PRESSURE TRANSDUCER." Periódico Tchê Química 15, no. 30 (August 20, 2018): 687–95. http://dx.doi.org/10.52571/ptq.v15.n30.2018.691_periodico30_pgs_687_695.pdf.

Full text

Abstract:

Pressure sensors play an important role in measuring variables in the control and automation systems of various processes. The purpose of this article is to study the design of a diamond semiconductor pressure sensor. In order to achieve this goal, the analysis was based on the Fourier law, but the authors made changes in the model of equations. The study was carried out using diamonds, as they are one of the promising materials for the manufacture of sensors and have high strength, thermal and radiation resistance. It was established that the output current in a semiconductor converter of the same load on the membrane does not depend on the supply voltage, which corresponds to the technical requirements developed in the converter. When determining the insulation resistance between the sensor plates, it was determined that the insulation resistance is less than 200 MW that meets the technical requirements.

APA, Harvard, Vancouver, ISO, and other styles

40

Campbell, C. S., and K. Rahman. "An improved particle pressure transducer." Measurement Science and Technology 3, no. 8 (August 1, 1992): 709–12. http://dx.doi.org/10.1088/0957-0233/3/8/004.

Full text

APA, Harvard, Vancouver, ISO, and other styles

41

Xia, J. S., L. Yin, E. D. Adams, and N. S. Sullivan. "A compact capacitive pressure transducer." Journal of Physics: Conference Series 150, no. 1 (February 1, 2009): 012054. http://dx.doi.org/10.1088/1742-6596/150/1/012054.

Full text

APA, Harvard, Vancouver, ISO, and other styles

42

Sponheimer, Christopher M., and Corinne S. Lengsfeld. "Novel protein based pressure transducer." Sensors and Actuators B: Chemical 168 (June 2012): 90–96. http://dx.doi.org/10.1016/j.snb.2012.02.033.

Full text

APA, Harvard, Vancouver, ISO, and other styles

43

Haughton, J., K. Drake, D. Bylski, L. S. Matthews, and S. A. Goldstein. "A new dynamic pressure transducer." Journal of Biomechanics 19, no. 6 (January 1986): 475. http://dx.doi.org/10.1016/0021-9290(86)90058-8.

Full text

APA, Harvard, Vancouver, ISO, and other styles

44

Carlton, Kevin. "Making an electronic pressure transducer." Physics Education 38, no. 4 (June 30, 2003): 283–85. http://dx.doi.org/10.1088/0031-9120/38/4/403.

Full text

APA, Harvard, Vancouver, ISO, and other styles

45

Bahk, Kyung Soo. "Pressure-balanced underwater acoustic transducer." Journal of the Acoustical Society of America 114, no. 4 (2003): 1710. http://dx.doi.org/10.1121/1.1627494.

Full text

APA, Harvard, Vancouver, ISO, and other styles

46

Avdoshin, E. S. "Light diode sound pressure transducer." Measurement Techniques 31, no. 7 (July 1988): 708–11. http://dx.doi.org/10.1007/bf00866673.

Full text

APA, Harvard, Vancouver, ISO, and other styles

47

Melki, Samir, Amit Todani, and George Cherfan. "An Implantable Intraocular Pressure Transducer." JAMA Ophthalmology 132, no. 10 (October 1, 2014): 1221. http://dx.doi.org/10.1001/jamaophthalmol.2014.1739.

Full text

APA, Harvard, Vancouver, ISO, and other styles

48

Barlow, Philip, A. David Mendelow, Audrey E. Lawrence, Marion Barlow, and John O. Rowan. "Clinical evaluation of two methods of subdural pressure monitoring." Journal of Neurosurgery 63, no. 4 (October 1985): 578–82. http://dx.doi.org/10.3171/jns.1985.63.4.0578.

Full text

Abstract:

✓ Recordings from two different types of subdural pressure monitor with simultaneous intraventricular pressure (IVP) tracings are compared in 20 head-injured patients. In the first 10 patients a fluid-filled catheter was placed subdurally and connected to an external transducer, and in the second 10 the Gaeltec model ICT/b solid state miniature transducer was used. The latter system has the advantage that both zero and calibration checks can be carried out after insertion. Only 44% of the fluid-filled catheter readings corresponded with IVP in series of 10-mm Hg ranges, while 53% of readings were lower; this tendency was more marked at higher pressures. With the Gaeltec transducer, 72% of subdural pressure readings corresponded with IVP, while only 9% were lower and 19% were higher than IVP. The differences may have been due to technical causes or to true pressure differentials. The subdural catheter appears too unreliable for routine clinical use, but the Gaeltec transducer may be a satisfactory alternative to ventricular pressure monitoring.

APA, Harvard, Vancouver, ISO, and other styles

49

Searl, Jeffrey P. "Comparison of Transducers and Intraoral Placement Options for Measuring Lingua-Palatal Contact Pressure During Speech." Journal of Speech, Language, and Hearing Research 46, no. 6 (December 2003): 1444–56. http://dx.doi.org/10.1044/1092-4388(2003/112).

Full text

Abstract:

Two studies were completed that focused on instrumentation and procedural issues associated with measurement of lingua-palatal contact pressure (LPCP) during speech. In the first experiment, physical features and response characteristics of 2 miniature pressure transducers (Entran EPI-BO and Precision Measurement 60S) were evaluated to identify a transducer suitable for measuring LPCP during speech. The 2 transducers were comparable in terms of physical dimensions and most response characteristics. However, the Entran device was less affected by air temperature fluctuations, making it the more attractive option for speech LPCP measurement. In a second experiment, 3 methods of placing the Entran device in the mouth were compared. The 3 adhesion methods evaluated were (a) taping a transducer to the hard palate, (b) surface mounting on a mold of the palate, and (c) flush mounting on a mold of the palate. Directly taping the transducer to the alveolar ridge was the least acceptable option, as it resulted in changes in other aspects of speech production (consonant duration and centroid frequency of the burst/frication) suggesting that articulation was unduly altered. Direct taping was also rated as least acceptable by the speakers. Surface and flush mounting resulted in fewer changes in speech aerodynamic and acoustic parameters of /t/ and/s/ compared to the tape condition. Listener ratings also indicated less articulatory disturbance in the surface and flush mounting conditions compared to the tape condition. Surface mounting was technically easier than flush mounting and it allows for rapid repositioning of the transducer if needed.

APA, Harvard, Vancouver, ISO, and other styles

50

Li, Depeng, Yu Lan, Tianfang Zhou, and Wei Lu. "Numerical and experimental investigation of a negative-curvature variable-shell flextensional transducer." Journal of the Acoustical Society of America 153, no. 1 (January 2023): 505–16. http://dx.doi.org/10.1121/10.0016884.

Full text

Abstract:

Type IV flextensional transducers do not have broadband characteristics due to the deep valley between their first- and second-order response curves arising from the sound pressure cancellation produced by the vibration in different areas of the shell. In this paper, the cause of the deep valley is examined by analyzing the equivalent radiated sound field of the transducer. Simplifying the three-dimensional vibration equation to a two-dimensional equation shows that the vibration state of the shell is related to the positive and negative curvature. Therefore, a variable-shell flextensional transducer with a negative curvature is proposed, which changes the second-order vibration of the transducer by introducing a negative curvature structure. The transducer avoids acoustic pressure cancellation, achieves broadband characteristics, and has continuous high efficiency in the frequency band. After optimization, a prototype of the transducer is fabricated and a pool test is completed. The test results show that the transducer realizes the coupling of the first three vibration mode, forming a broad band with an in-band fluctuation of less than 8 dB at 1200–5600 Hz, and the efficiencies of the first to third resonance peaks are 30.2[Formula: see text], 16.6[Formula: see text], and 9.4[Formula: see text], respectively.

APA, Harvard, Vancouver, ISO, and other styles

Journal articles on the topic 'Pressure transducer'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles