Artykuły w czasopismach: „Electric field meter”

1

Bordonskii, G. S., i S. D. Krylov. "A Quasistatic Electric Field Meter". Instruments and Experimental Techniques 46, nr 6 (listopad 2003): 832–33. http://dx.doi.org/10.1023/b:inet.0000008941.52605.b5.

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Adzhiev, A. H., E. A. Korovin, S. V. Chernyshev, G. G. Shchukin i D. D. Kuliev. "An atmospheric electric field meter". Instruments and Experimental Techniques 60, nr 5 (wrzesień 2017): 733–36. http://dx.doi.org/10.1134/s0020441217050013.

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Tokatly, V. I. "Electric field meter with dipole antenna in an alternating nonuniform electric field". Measurement Techniques 35, nr 11 (listopad 1992): 1335–43. http://dx.doi.org/10.1007/bf01821927.

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Ivaška, Vladislovas, i Vytautas Jonkus. "Electric field modelling for wood moisture meter". Lithuanian Journal of Physics 44, nr 4 (2004): 259–62. http://dx.doi.org/10.3952/lithjphys.44403.

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Buzinov, V. S., N. N. Iskhakova i V. A. Tishchenko. "Reference wide-band electric-field intensity meter". Measurement Techniques 33, nr 10 (październik 1990): 1035–37. http://dx.doi.org/10.1007/bf00990526.

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Tokatly, V. I. "Electric field meter with a dipole antenna in a nonuniform alternating electric field". Measurement Techniques 35, nr 12 (grudzień 1992): 1424–29. http://dx.doi.org/10.1007/bf00976889.

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Tokatly, V. I. "Electric field meter with a dipole antenna in an elliptically polarized electric field". Measurement Techniques 37, nr 2 (luty 1994): 193–98. http://dx.doi.org/10.1007/bf00979213.

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Strasser, Ryan, Sylvester Badua, Ajay Sharda, Devin Mangus i Lucas Haag. "Performance of Planter Electric-drive Seed Meter during Simulated Planting Scenarios". Applied Engineering in Agriculture 35, nr 6 (2019): 925–35. http://dx.doi.org/10.13031/aea.13763.

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Highlights. Seed meter rpm error decreased with increasing planter speed during steady states.Point-row operations could result in up to 10-13 seeds being over- or under-planted.Seed meter rpm error varied from -7.2% to 7.9% during curve planting transient states. Abstract. Electric drive seed metering systems have become a common method for singulating row crop seed. These singulation systems have substantially fewer moving parts and can potentially respond more quickly than other drive mechanisms. However, the accuracy and response time of these systems has yet to be examined to quantify potential benefits of adoption. The objectives of this study were (1) to quantify accuracy and response time of electric meter drives to varying ground speeds and speed transitions during in-lab simulation planting operations on straight-line and curves, and (2) to compare actual seed meter motor speed to target meter speed during simulation field scenarios. To quantify metering system performance, test scenarios were developed to simulate planting on headlands, within field boundaries including traversing in-field obstacles, and planting on curves with different radii. Ground speeds during simulation scenarios were 7.2, 12.9, and 16.1 kph when operating on straight rows and 6.0, 8, 11, and 14.5 kph when planting along curvilinear paths. Test scenarios also included planter acceleration and deceleration at 0.4 and 0.6 m/s2 when traversing in-field obstacles and tighter radii curves. Tests were conducted with two different seeding rates, 44,460 and 88,920 seeds/ha. Eight high frequency encoders were mounted on the electric meters of selected row units to record real-time meter rpm and quantify seed meter accuracy and response time. A custom DAQ system was developed to read simulation test scenario data files in ASCII text file format and send prescribed ground speed commands to the Horsch Maestro 24.30 planter’s ECU at 10 Hz using a program written in LabVIEW. Results indicated that seed metering accuracy increased as ground speed increased resulting in a significantly lower seed meter rpm error at 16.1 kph under steady-state conditions. During transient states, seed meters needed 3 to 4 s to respond during deceleration and acceleration resulting to seed meter rpm error ranging from -3.7% to 3.6% at 44,460 seeds/ha seeding rate and from -3.8% to 3.2% at 88,920 seeds/ha seeding rate. During point-row operations, the response time of the meters was 0.4 s which could result in up to 10 seeds being under-planted and up to 13 seeds being over-planted per row unit. During curvilinear planting, seed meter rpm error for steady states ranged from -0.5% to 0.8% across varying turn radii resulting to seeding rate error ranging from -223 to 370 seeds/ha while during transient states seed meter rpm error varied from -7.2% to 7.9% resulting to seeding rate error ranging from -5,886 to 7,187 seeds/ha. Keywords: Seed meter rpm, Seeding rate error, Simulation, Variable rate planting, Planter meter.

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Johnston, A. R., i H. Kirkham. "A miniaturized space-potential DC electric field meter". IEEE Transactions on Power Delivery 4, nr 2 (kwiecień 1989): 1253–61. http://dx.doi.org/10.1109/61.25611.

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Johnston, Alan R., Harold Kirkham i Bjorn T. Eng. "dc electric field meter with fiber‐optic readout". Review of Scientific Instruments 57, nr 11 (listopad 1986): 2746–53. http://dx.doi.org/10.1063/1.1139037.

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Harrison, R. Giles, i Graeme J. Marlton. "Fair weather electric field meter for atmospheric science platforms". Journal of Electrostatics 107 (wrzesień 2020): 103489. http://dx.doi.org/10.1016/j.elstat.2020.103489.

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Herawan, Mohamad Ramdan Febriana, i Deny Hamdani. "Pemodelan dan Simulasi Medan Listrik pada Jaringan Distribusi 20 kV Double Feeder Konstruksi 3B". Jurnal Rekayasa Hijau 4, nr 3 (15.11.2020): 109–32. http://dx.doi.org/10.26760/jrh.v4i3.109-132.

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ABSTRAKPeralatan listrik yang bertegangan dapat menyebabkan medan listrik di sekitar peralatan listrik, mengetahui besaran nilai medan listrik menjadi hal yang penting, untuk mengetahui paparan medan listrik pada lingkungan sekitar. Metode numerik memainkan peran penting dalam perhitungan medan listrik untuk studi medan listrik yang terkait dengan aplikasi tegangan tinggi. Charge Simulation Method merupakan salah satu metode numerik yang dapat digunakan sebagai pendekatan untuk menghitung distribusi medan listrik dan medan magnet pada penghantar yang bertegangan. Paper ini membahas pemodelan medan listrik di sekitar jaringan distribusi double feeder kontruksi 3B dengan menggunakan Matlab untuk mengetahui jarak ambang batas aman pengaruh medan listrik bagi manusia. Simulasi dilakukan pada setiap fasa konduktor dengan jarak ukuran setiap fasa diatur sesuai kontruksi yang diterapkan pada PLN. Hasil penelitian menunjukan bahwa simulasi menggunakan MATLAB pada distribusi 20 kV double feeder kontruksi 3B, hasil medan listrik maksimal pada ketinggian 1 meter atau pada ketinggian rata-rata manusia, memiliki besaran 1,54 kV/meter. Besaran medan ini lebih kecil dari batas minimal standar WHO dan SNI, sehingga masih masuk batas aman.Kata kunci: medan listrik, charge simulation method, jaringan distribusi, distribusi kontruksi double feeder 3BABSTRACTElectrical equipment can cause an electric field around the equipment, knowing the value of the electric field becomes important, to determine the exposure of the electric field to the surrounding environment. Numerical methods play an important role in the computation of electric fields for the study of electric fields related to high voltage applications. Charge Simulation Method is one of the numerical methods that can be used as an approach to computate the distribution of electric and magnetic fields in a live conductor. This paper discusses the modeling of the electric field around the distribution double feeder 3B construction network using Matlab to determine the safe threshold distance of the influence of the electric field for humans. Simulation experiments are carried out on each phase of the conductor with the distance of each phase adjusted according to the applied construction to PLN. The results showed that the simulation using MATLAB on the distribution of 20 kV double feeder construction of 3B, value of the maximum electric field at an altitude of 1 meter or at an average height of humans, has a magnitude of 1.54 kV / meter. The magnitude of this field is smaller than the minimum WHO and SNI standards, so it is still safe for humans.Keywords: electric field, charge simulation method, distribution network, 3B double feeder construction distribution

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Aydin, A., P. B. Stiffell, R. J. Prance i H. Prance. "A high sensitivity calibrated electric field meter based on the electric potential sensor". Measurement Science and Technology 21, nr 12 (4.11.2010): 125901. http://dx.doi.org/10.1088/0957-0233/21/12/125901.

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Novák, Ján, Veronika Ardonová i Zuzana Hlaváčová. "Electrical properties of mung beans (Vigna Radiata L.)". Journal on Processing and Energy in Agriculture 25, nr 3 (2021): 101–5. http://dx.doi.org/10.5937/jpea25-34115.

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This paper contains the results of measuring the electrical properties of mung beans (Vigna radiata L.) set. The conductivity and relative permittivity are the main parameters of dielectric material electrical properties. The electrical properties of mung beans samples had not been sufficiently measured, and the aim of this work was to perform the measurements of these properties. Measurements were performed under variable moisture content and the frequency of electric field from 0.1 kHz till 200 kHz for conductivity and in the range from 1 MHz to 16 MHz for relative permittivity, using RLC meter and Q meter, respectively. It was concluded that relative permittivity and conductivity increased with the increase of moisture content; resistivity, impedance, loss tangent, and relative permittivity decreased as the frequency of the electric field increased.

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Randa, J., i M. Kanda. "Multiple-source, multiple-frequency error of an electric field meter". IEEE Transactions on Antennas and Propagation 33, nr 1 (styczeń 1985): 2–9. http://dx.doi.org/10.1109/tap.1985.1143461.

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Yu, Hai Bo, Jia Liu, Chun Yu Wang, Li Li i Rui Ming Tong. "Preliminary Study on the Effect of Operating Conditions on the Measurement Accuracy of Electronic Type Electric Energy Meter". Advanced Materials Research 834-836 (październik 2013): 1246–50. http://dx.doi.org/10.4028/www.scientific.net/amr.834-836.1246.

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The verification of electronic type electric energy meter is under strict reference conditions, but some special operating conditions at locale will exceed the standard scopes. In order to improve the calculation accuracy and operating reliability of electric energy meter under operating conditions, it is necessary to study the operating conditions. According to the working principle and the standard verification regulation of electronic type electric energy meter, this paper summarizes these operating conditions: low power factor, harmonic waves, dynamic impulsive load, voltage fluctuation and outside magnetic field of power frequency, then analyzes the causes of operating conditions and their influence on electronic type electric energy meter, eventually lays foundation for thorough and systematic study of electric energy meter in the operating conditions, and establishes measurement center database of operating conditions.

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Ponnle, Akinlolu A. "Measurement and Assessment of Exposure to 50 Hz Magnetic Fields from Common Home Electrical Appliances". European Journal of Engineering and Technology Research 7, nr 3 (30.06.2022): 119–27. http://dx.doi.org/10.24018/ejeng.2022.7.3.2832.

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In this twenty first century, man is exposed to a very high amount of magnetic fields in his environment. This is mainly due to the ubiquitous use of electricity and other technological devices, which are the major sources of magnetic field pollution. The effect of magnetic field exposure on health problems and safety risk of people is continually being investigated. A number of international organizations have formulated guidelines on limits to the value of the generated magnetic field. This work provides information on the amount of 50 Hz magnetic field created by some common home electrical appliances, and compare results obtained with permissible exposure limit by The International Commission on Non-Ionising Radiation Protection (ICNIRP) for the public. The home electrical appliances investigated include electric cooker, hair dryer, toaster, kettle, fan, microwave oven, electric iron, voltage stabilizer, etc. Measurements were carried out with the aid of a magnetic field strength meter, at a distance of 3 cm to 75 cm from the appliances. Results showed that the magnetic field varies with distance from the appliances (by quarter of a meter, most become negligible), the power consumption of the appliance, the age of the appliance, and the product (manufacturer) of the appliance. Also, appliances with electromagnets, coils and electric motors produce more magnetic fields than appliances with heating elements. At a distance of 3 cm from the appliances, the highest value of magnetic field obtained was 85.5 µT and the lowest value of the magnetic field obtained was 4.28 µT. The overall results obtained indicate that the magnetic field strengths are lower than the maximum permissible exposure limit (100 µT) recommended by ICNIRP for members of the public, and therefore, will not lead to any significant exposure risk. In conclusion, in-expensive measures of reducing magnetic field exposure are recommended.

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Xu, Wei, Cancan Zhang, Xinyuan Ji i Hongyan Xing. "Inversion of a Thunderstorm Cloud Charging Model Based on a 3D Atmospheric Electric Field". Applied Sciences 8, nr 12 (16.12.2018): 2642. http://dx.doi.org/10.3390/app8122642.

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The measurement of the atmospheric electric field is of great significance for the study of thunderstorm cloud charge models. Traditional electric field meters can only measure the vertical component of the atmospheric electric field, and thus it is difficult to invert the structure of the thunderstorm cloud. A three-dimensional atmospheric electric field meter was developed to simultaneously measure the horizontal and vertical components of the atmospheric electric field in this paper. The effective measurement linearly relates the measured electric field to the induced voltage, and the nonlinear equations of the three-dimensional atmospheric electric field and the thunderstorm cloud-charging model parameters were derived. The particle swarm optimization algorithm (PSO) and the three-dimensional atmospheric electric field were used to invert the thunderstorm clouds. Experimental observations of the three-dimensional electric field in a cloud during a thunderstorm were analyzed. Combined with the typical charged structure model, parameters such as the charge and relative distance of the thunderstorm cloud were determined. The results showed that the value of the inversion fitness function reached 0.7288, and the charge structure was even. The measurement of the three-dimensional atmospheric electric field provides a new means of observation for the study of atmospheric electricity.

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Wen, Xiaolong, Pengfei Yang, Zhouwei Zhang, Zhaozhi Chu, Chunrong Peng, Yutao Liu, Shuang Wu, Bo Zhang i Fengjie Zheng. "Resolution-Enhancing Structure for the Electric Field Microsensor Chip". Micromachines 12, nr 8 (7.08.2021): 936. http://dx.doi.org/10.3390/mi12080936.

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Electrostatic voltage is a vital parameter in industrial production lines, for reducing electrostatic discharge harms and improving yields. Due to such drawbacks as package shielding and low resolution, previously reported electric field microsensors are still not applicable for industrial static monitoring uses. In this paper, we introduce a newly designed microsensor package structure, which enhances the field strength inside the package cavity remarkably. This magnification effect was studied and optimized by both theoretical calculation and ANSYS simulation. By means of the digital synthesizer and digital coherent demodulation method, the compact signal processing circuit for the packaged microsensor was also developed. The meter prototype was calibrated above a charged metal plate, and the electric field resolution was 5 V/m, while the measuring error was less than 3 V, from −1 kV to 1 kV in a 2 cm distance. The meter was also installed into a production line and showed good consistency with, and better resolution than, a traditional vibratory capacitance sensor.

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Novák, Ján. "Electric Properties Measurement of Lentil". Acta Technologica Agriculturae 21, nr 1 (1.03.2018): 18–23. http://dx.doi.org/10.2478/ata-2018-0004.

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AbstractThis paper contains the results of the electric properties measurement of lentil set. Electric measurements with use of these materials are of fundamental importance in relation to the analysis of quantity of absorbed water and dielectric heating characteristics. The aim of this paper was to perform the measurements of conductivity, dielectric constant and loss tangent on samples of lentil, the electrical properties of which had not been sufficiently measured. Measurements were performed under various moisture contents, and the frequency of electric field ranged from 1 MHz to 16 MHz, using a Q meter with coaxial probe. It was concluded that conductivity, relative permittivity and loss tangent increased with an increase in moisture content, and dielectric constant and loss tangent decreased as the frequency of electric field increased.

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Wu, Yu-Hsuan, Martin A. Gundersen i P. Thomas Vernier. "Nanosecond Megavolt-Per-Meter Pulsed Electric Field Effects on Biological Membranes". Biophysical Journal 100, nr 3 (luty 2011): 502a. http://dx.doi.org/10.1016/j.bpj.2010.12.2938.

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Buber, V. B., Yu A. Pivovarov i A. A. Sokolov. "Digital meter of electric field pulse amplitudes with automatic sensitivity calibration". Measurement Techniques 30, nr 2 (luty 1987): 180–82. http://dx.doi.org/10.1007/bf00865874.

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Zaalishvili, Vladislav, Olga Burdzieva, Tamaz Zaks i Aleksandr Kanukov. "Investigation of ecogeophysical factors of the environment of Vladikavkaz". E3S Web of Conferences 164 (2020): 07026. http://dx.doi.org/10.1051/e3sconf/202016407026.

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A study of ecogeophysical factors of the environment in Vladikavkaz was carried out at 126 points: indicators of noise pollution, electric fields and the level of gamma radiation were measured. The noise level was determined with the help of noise and vibration meter Ekogeofizika-110A of the domestic company Oktava. It has been defined that the population of Vladikavkaz is subjected to a significant noise period of time, which exceeds the permissible level, which can negatively affect the health of citizens. Measurements of gamma radiation level were made using a gamma radiation dosimeter DBGA-OCHA. According to the obtained data, the population of Vladikavkaz is exposed to the gamma radiation in the range of 0.05–0.18 µSv/h and with an average value of 0.11 µSv/h, which is below the maximum permissible level. In order to study the electric fields, the measurements were carried out by the electric field meter IEP-05. The electric field strength reached up to 1400 V/m at individual measurement points, at an acceptable level of 800 V/m; this indicator exceeds the maximum permissible values.

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Yulkifli, Yulkifli, Fitri Afriani, Yohandri Yohandri i Ramli Ramli. "THE DESIGN OF DISPLAY DIGITAL DATA INTERFACE CLAMP-METER COMPLEMENTED BY SENSOR GMR (GIANT MAGNETORESISTANCE)". Spektra: Jurnal Fisika dan Aplikasinya 5, nr 1 (30.04.2020): 53–60. http://dx.doi.org/10.21009/spektra.051.06.

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This article discusses the design of a robust data interface system that displays an electric current using the GMR sensor. Robust measurement of electrical current to detect magnetic fields contained in the current-carrying wire. The magnetic field on the cable should be the input signal to the GMR sensor to be processed by the interface program. This interface used the Arduino IDE program and displayed in the LCD screen. This research is an experimental research laboratory. The results of the data interface can be displayed in the form of comparative measurements with the power of the conventional electric current. Comparison measurements can be viewed in graphical form. The results of the study have an average measurement accuracy of 91.2%, with an average of 0.96. Besides, this study also obtained a standard deviation of 0.21 and an average error of 0:08.

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Tantisattayakul, T., K. Masugata, I. Kitamura i K. Kontani. "Development of the Hybrid Electric Field Meter for Simultaneous Measuring of Vertical and Horizontal Electric Fields of the Thundercloud". IEEE Transactions on Electromagnetic Compatibility 48, nr 2 (maj 2006): 435–38. http://dx.doi.org/10.1109/temc.2005.861379.

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Purnama, Kiki, i Tri Rahajoeningroem. "Design of Prepaid kWh-Meter Prototype Monitoring Based on Short Message Service (SMS)". Telekontran : Jurnal Ilmiah Telekomunikasi, Kendali dan Elektronika Terapan 6, nr 2 (25.10.2018): 1–11. http://dx.doi.org/10.34010/telekontran.v6i2.3795.

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Abstract - At the moment, people who use electricity as their daily necessities still use the methods that have been in the past, namely by purchasing an electric voucher that has been available several digits of code entered into the prepaid kWh meter via the keypad. This method is considered to be less effective and less efficient in a period that has experienced a lot of progress, especially in the field of technology. Especially when the electric pulse has reached the minimum limit of the prepaid kWh meter, it only gives a warning to the sound of the buzzer alarm, it can only be heard by the customer if he is inside the house. so that the customer cannot find out if the customer is out of the house. Automatically the kWh meter customer is not prepared to deal with it if the user is not at home. So from that the research that will be made is a prototype prepaid kWh meter based on Short Message Service (SMS). In addition to being able to control the remaining electricity pulses remotely, this tool will also be able to charge electric pulses without having to enter the voucher code into the kWh meter directly but with this tool the customer can fill in by sending a short message or SMS set by the customer. The system contained in this Short Message Service (SMS) prepaid kWh meter prototype is controlled by 16 ATM AVR Microcontrollers. When the prepaid kWh meter value shows a value of 5 kWh, the system automatically provides information on the remaining kWh meter electricity through short message or SMS and marked with the buzzer sound and LED indicator. That will be made is considered to be more effective and flexible. From the results of the research data that have been collected, it can be seen that the performance of SMS-based prepaid kWh meters with the overall test results is successful and the percentage of success almost reaches 100%. Keyword:’ Prepaid kWh Meter, Short Message Service (SMS), Buzzer, Microcontroller ATMega16.’

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Sachdev, R. N., G. Swarup, K. K. Rajan i Leena Joseph. "Evaluation of Aperture Efficiency of a Radiqfrequency Electric Field Strength Meter Antenna". Health Physics 72, nr 2 (luty 1997): 318–20. http://dx.doi.org/10.1097/00004032-199702000-00018.

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Li, Lin, i Hongliang Zheng. "Numerical simulation of ultrasonic heat meter by multiphysics coupling finite-element simulation software". Thermal Science 24, nr 5 Part B (2020): 3309–217. http://dx.doi.org/10.2298/tsci191106122l.

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Objective: To increase heat calculation accuracy, the numerical simulation of the ultrasonic heat meter is explored by multiphysics coupling. Methods: The COMSOL, a multiphysics coupling finite-element simulation software, is used to build the coupling model of the sound field, structure field, and electric field. The propagation of ultrasonic waves in heat meters is simulated, and its sound field distribution in pure water is analyzed. According to the operating conditions of ultrasonic heat meters, the influence of impurities with different concentrations on ultrasonic propagation is analyzed. The end-face sound pressure levels of the incident transducer and the receiving transducer are compared to obtain the attenuation laws of ultrasonic waves in the liquid-solid two-phase flow. Results: The main lobe and multiple side lobes exist during the propagation of ultrasonic waves. The energy of the main lobe is higher than that of the side lobes. Bubbles resonate under the action of the sound field. Also, bubbles of different diameters correspond to different resonance frequencies, which have larger sound pressure than that of the incident sound field. Most of the sound waves are reflected at the liquid-solid interface, while some of them continue to propagate through the media, affecting the sound pressure distribution on the end-face of the receiving transducer, thereby affecting the measurement accuracy of the ultrasonic heat meter. Conclusion: The reliability and detection efficiency of the heat meter is improved, which is significant and theoretically valuable.

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WOLLENHAUPT, N. C., J. L. RICHARDSON, J. E. FOSS i E. C. DOLL. "A RAPID METHOD FOR ESTIMATING WEIGHTED SOIL SALINITY FROM APPARENT SOIL ELECTRICAL CONDUCTIVITY MEASURED WITH AN ABOVEGROUND ELECTROMAGNETIC INDUCTION METER". Canadian Journal of Soil Science 66, nr 2 (1.05.1986): 315–21. http://dx.doi.org/10.4141/cjss86-032.

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This study presents a method for calibrating electromagnetic induction instrument readings with saturated paste electrical conductivity (ECe) for field mapping purposes. Each meter reading represents an integration of the apparent soil electrical conductivity (ECa) over the meter’s response depth. To correlate the meter readings with measured ECe within soil depth increments, several pedons representing a range of soil salinity for the survey area were sampled in 30-cm increments to a depth corresponding to the meter response. A weighting procedure based on the meter response-depth function was developed to condense the multiple ECe by depth measurements into a single weighted area specific value. These values were correlated with the apparent soil electric conductivity from the electromagnetic induction instrument by simple linear regression. This technique is designed for soil association of similar parent materials. The resulting regression equation yields a quick reliable equation that avoids complex mathematics and converts the instrument readings into weighted forms of commonly used saturated paste electrical conductivity values. Key words: Soil survey, electrical resistance

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Akinsanmi, Olaitan, B. G. Bajoga i D. D. Dajab. "Comparative Analysis of Electric Field Measurement in Zaria". Advanced Materials Research 62-64 (luty 2009): 141–46. http://dx.doi.org/10.4028/www.scientific.net/amr.62-64.141.

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This paper presents the comparative analysis of the measurement of static electric field within and outside the test location in Zaria, Nigeria, based on the measurement carried out using a data acquisition system, interfaced with a digital electrostatic field strength meter (model 257D). The acquired electric field data are captured by a computer using the Microsoft Office Excel Program. The focus of the analysis is determining the effect of environmental factors such as temperature, pressure and relative humidity on the static electric field during the harmattan (March) and non-harmattan period (April – May). The plots of the average electric field against the variation of the environmental factors were used as the qualitative analytical tools and conclusion was drawn to the fact that the relative variation in the measurement of the electric field within and outside the test location is averagely 0.06KV/cm and dependent on the environmental factors.

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Jiang, Chao, Chen Guang Zhang i Xu Zhang. "Standardized Design of Warehouse Management for Electric Energy Measuring Center". Advanced Materials Research 749 (sierpień 2013): 634–40. http://dx.doi.org/10.4028/www.scientific.net/amr.749.634.

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Warehouse management is an important content in the electric energy measuring center standardization construction and a very important part in the full life cycle management of electrical energy measuring instruments. By introducing intelligent warehousing technology, a kind of standardized work flows was proposed based on the production characteristics of the instruments. It combines with the advantages which are high degree of automation and highly integrated. The work flow specificities the new share energy meter storage process, energy meter of storage processes for Verification, as well as distribution warehousing processes. The overall architecture of Energy Metering Centre production scheduling platform was proposed which divided into field equipment layer, monitoring and management layer, production scheduling layer. The design of the layers were introduced.

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Wang, Yunxia, Wenyi Zhang, Bing Qi i Qianqian Xia. "Comparison of Field Performance of Different Driving Systems and Forward Speed Measuring Methods for a Wet Direct Seeder of Rice". Agronomy 12, nr 7 (11.07.2022): 1655. http://dx.doi.org/10.3390/agronomy12071655.

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Research on precision seeders operated in the dry field shows that an electric driving system used for a seed meter can significantly improve the planting uniformity. The measuring method for forward speed greatly affects the control accuracy of the electric driving system. However, the performance of an electric drive system for precision seeders operating in wet fields, such as paddy, is still unclear. The operating conditions of dry and wet fields are quite different, and it is necessary to study the effects of an electric driving system and corresponding speed measuring methods on a wet-field operating seeder. In this paper, field experiments were carried out by using a wet direct planter of rice under three driving methods for seed meter, including classic mechanical driving system (MDS), electric driving system with speed acquiring from an encoder (EDSE), and electric driving system with speed acquiring from the global positioning system (EDSG), at forward speeds of 4.62, 5.81, and 7.23 km·h−1. The seeding uniformity (seeding rates, coefficient of variations) and the slippage (slippage rate, broken strips) were investigated. Results showed that the EDSG exhibited more qualified operation performance compared with the MDS and the EDSE. For both the MDS and EDSE, the seeding rates significantly decreased and deviated from the desired value as the forward speed increased. The negative slippages of MDS and EDSE were 3.47–31.72% and 2.13–7.7%, respectively, and they significantly increased when the forward speeds increased from 4.62 to 7.23 km·h−1. Analysis of the seeding uniformity and slippage presented that the EDSG exhibited a more qualified operation and is recommended for the wet direct seeder of rice.

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Cheng, Ying Ying, Hua Xiao Yang i Ji Xiao. "Research on a New Type of Electric Energy Meter Charged Detection Terminal Box". Applied Mechanics and Materials 278-280 (styczeń 2013): 220–24. http://dx.doi.org/10.4028/www.scientific.net/amm.278-280.220.

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Aiming at the field live detection of the electric energy meter, the research on the new structure and the charged detection method of the terminal boxes were carried out. The results can be directly applied to the charged detection of the electric energy metering device, which can improve work efficiency and security. It has great significance to ensure that the electric energy metering device of the power system can operate safely, stably and economically.

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Cui, Shengsheng, Yang Gao, Yan Yang, Bin Ma, Jianfeng Sun, Xi Li i Shubei Hua. "Design and Research of Constant Magnetic Field Verification Device for Electric Energy Meter". IOP Conference Series: Earth and Environmental Science 769, nr 4 (1.05.2021): 042108. http://dx.doi.org/10.1088/1755-1315/769/4/042108.

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Masugata, K., I. Kitamura, M. Sekiya, T. Murai, N. Ikeda, N. Itamoto i T. Sakai. "Development of an Electric Field Meter Using the Charging Phenomena of Water Drops". IEEJ Transactions on Power and Energy 120, nr 6 (2000): 879–84. http://dx.doi.org/10.1541/ieejpes1990.120.6_879.

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Chen, Hsing-Yi, i Tsung-Han Lin. "Simulations and Measurements of Electric Fields Emitted from a LTE Base Station in an Urban Area". International Journal of Antennas and Propagation 2014 (2014): 1–10. http://dx.doi.org/10.1155/2014/147341.

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Radiation patterns emitted from a long-term evolution (LTE) base station antenna were first simulated by the finite-difference time domain (FDTD) method. The validity of simulation results of radiation patterns was further checked by measurement data. After validating the accuracy of the FDTD method, electric fields at 123 test sites around a LTE base station in an urban area of Taipei City were simulated. Simulated electric fields were also validated by comparison with measured data obtained by a high frequency selective radiation meter with an isotropic E-field probe. Simulated and measured electric fields are in the range of 0.104–1.182 and 0.098–1.179 V/m at 1795 MHz, respectively. From obtained electric field strengths, it is ensured that the urban area is a good signal environment. The maximum power density emitted from the LTE base station is about1.853×10-4mW/cm2and is thus far below the safety standard value of 1.197 mW/cm2for human exposure to RF radiation at 1795 MHz.

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37

Pshchelko, N. S., i O. S. Tsareva. "Calculation of Voltages Ensuring Trouble-Free Operation of an Electrostatic Meter of the Direction of Small Angle Tilts". Journal of the Russian Universities. Radioelectronics 25, nr 1 (22.02.2022): 64–74. http://dx.doi.org/10.32603/1993-8985-2022-25-1-64-74.

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Introduction. Periodic geodetic observations are used to control the position of building structures and soil massifs. Since tilt is considered to be one of the most dangerous types of building deformations, this paper considers existing methods for its determination. When a horizontal displacement (tilt) is detected, it is of particular importance to assess not so much its angle but its direction. This allows preventive measures to be timely enforced. Therefore, determination of the direction of horizontal displacements at small tilt angles presents a relevant research problem. In order to increase the sensitivity of the considered measuring device, it is proposed to use the action of electric field.Aim. Calculation of electrical voltages that ensure reliable operation of the device under consideration, depending on its geometric dimensions and characteristics of the materials used.Materials and methods. The device was made of conductive, semiconductive and dielectric materials. Calculations were based on an analysis of forces acting on a vertically suspended load in the presence of electric field. The conditions of equilibrium and instability of the position of the load arising due to strong positive feedback in electric field were considered.Results. Calculations were performed to support a reasonable choice of geometric and electrophysical characteristics of the developed device. A formula was obtained for the values of electrical voltages that could ensure troublefree operation of the device. The calculated values of operating voltages were found to be acceptable for practical application. The main structural elements of the device and one of the possible methods for registering information signals were proposed.Conclusion. Due to the instable position of the load in a sufficiently strong electric field, the developed device allows the direction of displacements to be measured even when their values tend to zero. This makes the developed device promising for practical application. However, it should be noted that, under such small displacements, the accuracy of the device depends on the manufacturing conditions and random factors.

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Mutule, A., I. Zikmanis i A. M. Dumitrescu. "Electric Consumption Assessment using Smart Meter Data and KPI Methodology". Latvian Journal of Physics and Technical Sciences 57, nr 3 (1.06.2020): 3–19. http://dx.doi.org/10.2478/lpts-2020-0011.

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AbstractIn the modern world, many cities make use of state-of-the-art technologies for a diversity of applications. A field with very specific needs is the electric power system that deals with both large entities that govern themselves (grid operators) and the citizens. For both and all actors in between, there is an increased need for information. Steps to provide these data are always taken and several initiatives are ongoing across the world to equip residential users with last generation smart meters. However, a full deployment is still not possible. Considering this aspect, the authors propose KPIs for the specific situation when some information is available from the meters and other sources, but some is not. The study case is based on a residential area occupied mainly by university students and after an extensive measurement campaign the results have been studied and analysis methods proposed.

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Zhang, Yong, i Z. Xu. "Propagation and Deflection of Electric-Field-Induced Microcracks in 0.69Pb(Mg_1/3Nb_2/3)O₃-0.31PbTiO₃ Ferroelectric Single Crystals". Key Engineering Materials 336-338 (kwiecień 2007): 363–66. http://dx.doi.org/10.4028/www.scientific.net/kem.336-338.363.

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Propagation and deflection of microcracks driven by electric loading in <001>-oriented 0.69Pb(Mg1/3Nb2/3)O3-0.31PbTiO3 ferroelectric single crystals were investigated using an in-situ transmission electron microcopy (TEM) technique. The static observation of the domain pattern revealed the coexistence of sub-micrometer and nano-meter domains. Electric field induced deviation from the main microcrack path and subsequent propagation along the direction almost perpendicular to the electric field were observed directly. A qualitative analyses is given based on the maximum energy release rate criterion.

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Hesse, A., A. Jolivet i A. Tabbagh. "New prospects in shallow depth electrical surveying for archaeological and pedological applications". GEOPHYSICS 51, nr 3 (marzec 1986): 585–94. http://dx.doi.org/10.1190/1.1442113.

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Three different improvements in the galvanic method of shallow‐depth electrical prospecting need to be made. (1) A better definition of the electrode array(s) is needed in order to reduce the “apparent anisotropy” effect and increase the depth of investigation; the square array is one solution. (2) A resistivity meter that can make measurements very rapidly needs to be built. The rapid decrease of the induced electric field for small electrode distances makes such measurements possible. We propose a resistivity meter with an 8 ms measurement time. (3) The electrode‐ground contact problem needs to be solved by using a resistivity meter that can endure high contact resistances. As an alternative solution, we also propose a new type of electrode: a liquid jet one. These improvements could make the resistivity method very attractive and competitive, and open large future developments for the method.

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Appel, Matthew F., J. Ryan McKeachie, Wytze E. van der Veer i Thorsten Benter. "Simple induction probe electric field meter for the detection of electrical fields generated by ion-optical electrodes". Review of Scientific Instruments 75, nr 8 (sierpień 2004): 2603–7. http://dx.doi.org/10.1063/1.1765751.

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Liu, Ming, Zhi Hua Sun, Zhi Shen Wang, Xiao Yun Zhang i Feng Lu. "Insulation Treatment of 2A12 Aluminum Alloy Surface by Plasma Electrochemical Oxidation". Materials Science Forum 687 (czerwiec 2011): 297–302. http://dx.doi.org/10.4028/www.scientific.net/msf.687.297.

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The 2A12 aluminum alloy surface is treated by plasma electrochemical oxidation (PEO) in alkaline solution. X-ray Diffraction (XRD) is used to analyze the phases of PEO coatings. Scanning Electron Micrograph (SEM) is used to investigate the compactness of PEO coatings. High resistance meter and voltage resistance meter are used to measured Electric resistance and breakdown field strength of PEO coatings respectively. The results show that the PEO coating is composed of α-Al2O3, γ-Al2O3 , etc, and they are all well-insulated substance which is profitable to insulation of 2A12 aluminum alloy. When the thickness of PEO is more than 60μm, porosity in the PEO coating is estimated not more than 15%. Electric resistivity of PEO coatings can reach as high as 1013 Ω·cm, and breakdown field strength of the PEO coatings can reach 72 V / μm.

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TOKOROYAMA, Takayuki, Yusei YAMADA, Noritsugu UMEHARA i Motoyuki MURASHIMA. "The Micro-meter-sized Asperities manufactured by AC Electric Field for Vinyl Chloride Solvent". Proceedings of the Conference on Information, Intelligence and Precision Equipment : IIP 2020 (2020): 2C07. http://dx.doi.org/10.1299/jsmeiip.2020.2c07.

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Yin, Wei, Shengfei Tang, Weijie Zhu, Jin Chen, Jianguo Xie, Guodong Sun i Qin Xu. "Design and Research of Plug-in Strip for Field Verification of Electric Energy Meter". IOP Conference Series: Earth and Environmental Science 651 (10.02.2021): 022095. http://dx.doi.org/10.1088/1755-1315/651/2/022095.

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Tokatly, V. I. "Design of an electrodynamic model of a variable electric field meter with dipole antenna". Measurement Techniques 35, nr 6 (czerwiec 1992): 715–22. http://dx.doi.org/10.1007/bf00977066.

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Zhang, Z., Y. Tsuchiya, O. Akiyama i H. Konno. "An Ultra Low-Power MR*1) Sensor for a Smart Water Meter or a Smart Gas Meter". Key Engineering Materials 543 (marzec 2013): 418–21. http://dx.doi.org/10.4028/www.scientific.net/kem.543.418.

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A new ultra low power MR sensor comprising MR elements integrated with Bi-CMOS IC chip, which is optimal for the use in smart water meters and gas meters playing important role in global smart gridization, has been developed. MR elements are configured as a Wheatstone bridge circuit. MR element patterns are placed in the perpendicular configurations as resistive components of the circuit. Those detect the magnetic field applied to X and Y axis respectively, and then outputs either high or low-level electric signal. Optimization of the MR element pattern aspect ratio (ratio of the element length to the element width) and configuration of the two-row parallel MR patterns in a longitudinal direction enable the equivalent current flow in the direction. This provides mutual magnetostatic coupling and cancellation of each demagnetizing field, and led to achieve minimizing the hysteresis of the resistance change rate affected by up and down of the applied magnetic field. Furthermore, this led to the improvement of mutual symmetry for both S to N and N to S direction of the magnetic field. This resulted in enhanced magnetic sensitivity and successfully obtained magnetic sensitivity higher than 0.8kA/m. For the power supply of the MR sensor, external intermittent control was adopted. Furthermore, active (on) time of the MR element was considerably shortened by utilizing the internal circuit of the IC. As a result, the sampling time was shortened to 1μs and the drive current of MR sensor was reduced to 0.3 μA. *1)MR: Magneto-resistance

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Tsybin, Yu N. "MONITORING THE AFR OF THE INFORMATION SIGNAL FILTER OF A FLUX-GATE MAGNETOMETER ON THE EXAMPLE OF A SINGLE LINK BUTTERWORTH FILTER". Kontrol'. Diagnostika, nr 257 (2019): 40–49. http://dx.doi.org/10.14489/td.2019.11.pp.040-049.

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The content of this paper relates to the field of monitoring the parameters of a magnetic field (MF) meter with a MF a fluxgate sensor. The article directly discusses the control method for the amplitude frequency response (AFR) of the second harmonic filter of an EMF fluxgate meter. The purpose of the work is to minimize the workplace (WP) equipment for magnetometer monitoring. We suggest an AFR monitoring method based on three readings. As an input signal source, while monitoring an AFR filter, we suggest the use of a WP fluxgate meter. The fluxgate meter is installed in a magnetic screen. The method consists in generating the filter input signal using the magnetometer. The essence of the suggested method is to analyze the AFR symmetry. As the base filter, we use a second-order Butterworth filter with a narrowband symmetric AFR. The effect of the electrical element filter ratings is systematized in the form of a correspondence table: an electric element – an AFR parameter. We present the AFR sufficiency control analysis in terms of its symmetry. The AFR monitoring, in terms of its symmetry, has been supplemented with the Kр(f0) monitoring using the personal computer. We demonstrate the peculiarities of using a fluxgate meter as an input signal source. We derived the ratio of the magnetometer electronic part parameters that affect the accuracy (discreteness) of the filter’s input signal generation. We present an algorithm with a description of the magnetometer operation in the AFR monitoring mode.

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Ravichandran, M., i A. K. Kamra. "Spherical field meter to measure the electric field vector—measurements in fair weather and inside a dust devil". Review of Scientific Instruments 70, nr 4 (kwiecień 1999): 2140–49. http://dx.doi.org/10.1063/1.1149727.

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Khayyam Anjum, Shahid Hafeez, Junaid Naseer, Hafiz Masood Ahmad, Talha Faridi, Muhammad Ayyoub Tanvir i Mehwish Kanwal. "SOIL PHYSICO CHEMICAL PROPERTIES, WHEAT GRAIN YIELD AND ECONOMICS OF POPULUS DELTOIDES BASED AGRO FORESTRY SYSTEM". Agricultural Sciences Journal 5, nr 1 (30.04.2023): 37–44. http://dx.doi.org/10.56520/asj.v5i1.251.

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The research was carried out to determine the effect of Populus deltoides trees on the soil physical and chemical properties and grain yield of wheat crop under the agro ecological conditions of Faisalabad (Punjab), Pakistan. Two fields were selected; one with wheat monoculture and the other had boundary trees of Populus deltoides. The average age of the s Populus trees was 5 years. Number of trees was 40 per acre. The average height and diameter at breast height of trees was 12 meters and 42.43 cm respectively. The wheat crop was sown in October, 2020 in both fields and harvested in April, 2021. A quadrate of one meter square was used to collect the data. The quadrate was put at various distances (2-24 meter) from tree stems and the plants growing there were harvested. The grain yield (gm-2) per quadrate was determined with the help of an electric weighing balance. The soil samples were selected from both fields and various chemical and physical properties of soil were determined. The soil pH was 7.32 and 7.95 in wheat monoculture and Populus+wheat field respectively. Total nitrogen was 0.05 and 0.08%in both fields respectively as mentioned above. Organic matter was 0.64 and 0.81 in wheat monoculture and Populus based field respectively. The effect of Populus trees on grain yield of wheat was negative form 2m to 10 meter distance from trees. While from 12m to 24 m distance, wheat grain yield was more or less equal in both fields i.e. with and without trees. Net income was Rs. 67437.69 and Rs. 104781.03 per acre without and with trees, respectively. On the basis of this research, it is concluded that wheat + Poplar is more suitable option for farmers. So farmers should adopt this system to generate more money while keeping the inputs same.

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Wawolumaya, Corrie, i Djoko Darwanto. "A Study among Community Living Underneath SUTET about The General Health Condition and The Electromagnetic Fields Exposures". Kesmas: National Public Health Journal 4, nr 2 (1.10.2009): 57. http://dx.doi.org/10.21109/kesmas.v4i2.188.

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SUTET or the Extra High Voltage Transmission Line of 500 kV has passed through larger residential areas in the community. The aim of study is to provide the description of general health condition of community residing under SUTET in the urban poor of Jakarta and surrounding. The design of study was cross sectional, carried out among 1200 respondents which were taken stratified proportional purposively, based on zones of the electromagnetic field exposures. Data were collected through observation, interview and physical examination. The electric field and the magnetic field exposures were separately measured outside and inside the houses. The highest electromagnetic field exposures were measured at one meter height above the ground , for the electric field 3,1 kV/m. and the magnetic field 550 mA/m or 687,5.10-3µT, were identified in zone 1 0-20 ms. The magnetic field was decreasing gradually through zone2 300mA/m and nearing zero in zone 3. Both the highest electric field and the magnetic field exposures were below the threshold values stated by SNI 2003, 5 kV/m dan 0,1 mT or 80.104 mA/m (note: 1 A/m = 1,25 µT). The highest electric field exposure was identified at one meter height from the ground 2,5 kV/m at 02.00–03.00 hours a.m and the highest magnetic field 2400 mA/m at 12.00-16.00 hours p.m. The biggest portion of houses was poor ( 30 %) were beinghoused for morethan 30 years. The major diseases were found similar in all zones i.e., dental diseases, myopia and hypertension.Keywords: SUTET, zones, physical examination, 10 major diseases.AbstrakJaringan SUTET Perusahaan Listrik Negara banyak melalui daerah pemukiman. Tujuan penelitian mendapatkan gambaran kesehatan penduduk yang bermukim di bawah SUTET dan di daerah urban miskin Jakarta dan sekitarnya. Penelitian disain kroseksional ini dilakukan pada sample 1200 kepala keluarga yang ditarik secara stratifikasi proportional purposif berdasarkan zona kuat medan elektromagnet. Data dikumpulkan dengan metoda observasi, wawancara dan pemeriksaan kesehatan. Kuat medan listrik dan medan magnet diukur terpisah di luar rumah, dan di dalam rumah. Ditemukan kuat medan listrik tertinggipada ketinggian 1 meter di atas tanah 3,1 kV/m. Kuat medan magnet 550 mA/m atau 687,5.10-3µT diidentifikasi dalam zona 1 0-20 m yang menurun be-rangsur pada zona 2 300mA/m dan mendekati 0 pada zona 3. Medan listrik dan medan magnet berada di bawah nilai ambang SNI 2003, 5 kV/m dan 0,1 mT atau 80.104 mA/m (note: 1 A/m = 1,25 µT). Medan listrik tertinggi ditemukan pada ketinggian 1 meter dari tanah 2,5 kV/m pada jam 02.00–03.00 pagi danmedan magnet ttinggi 2400 mA/m pada jam 12.00-16.00 .Jenis rumah terbanyak adalah rumah kumuh ( 30 %) telah dimukimi lebih 30 tahun. Penyakit uta-ma di semua zona adalah gangguan gigi geligi, myopia dan hipertensi yang tidak berbeda antara zona.Kata kunci : SUTET, zona, kondisi kesehatan, 10 penyakit utama.

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