Journal articles: 'Frequency meter'

1

Brimicombe, Michael. "Frequency meter." Electronics Education 2000, no. 1 (December 1, 2000): 23–29. http://dx.doi.org/10.1049/ee.2000.0017.

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Elangovan, S. "Digital Frequency Meter." Electric Power Systems Research 21, no. 1 (April 1991): 17–21. http://dx.doi.org/10.1016/0378-7796(91)90033-j.

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Hinchberger, James L. "Billing Frequency and Meter Reading Frequency." Opflow 11, no. 1 (January 1985): 3. http://dx.doi.org/10.1002/j.1551-8701.1985.tb00373.x.

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IBRAHIM, KHALID M., MAHA A. S. JAAFAR, and MAJID A. H. ABDUL-KARIM. "Fast digital frequency meter." International Journal of Electronics 59, no. 2 (August 1985): 193–97. http://dx.doi.org/10.1080/00207218508920692.

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Kosyuk, V. I., and I. A. Pashanin. "Ultralow-frequency phase meter." Measurement Techniques 29, no. 8 (August 1986): 767–70. http://dx.doi.org/10.1007/bf00863967.

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Alampieva, E. M., R. T. Vasil'ev, and A. M. Filin. "Fast-response frequency meter." Measurement Techniques 32, no. 4 (April 1989): 382–85. http://dx.doi.org/10.1007/bf00866642.

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Cheesewright, Robert, Ali Belhadj, and Colin Clark. "Effect of Mechanical Vibrations on Coriolis Mass Flow Meters." Journal of Dynamic Systems, Measurement, and Control 125, no. 1 (March 1, 2003): 103–13. http://dx.doi.org/10.1115/1.1539098.

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An analytical study of the response of a simple Coriolis meter subjected to external mechanical vibrations and corresponding finite element studies of three commercially available meters are presented. These show that vibrations produce additional components in the meter sensor signals but that these components are only at the frequency of the vibrations. The results show that errors reported in vibration experiments, using any frequency except the meter drive frequency, are due to failure of the determination of the phase difference between the sensor signals. The results also show that external vibrations at the meter drive frequency produce a meter error regardless of the phase detection algorithm.

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Yanenko, Oleksii, and A. E. Arustamian. "DIGITAL PHASE FREQUENCY METER DISTANCE." Bulletin of Kyiv Polytechnic Institute. Series Instrument Making, no. 55(1) (June 29, 2018): 49–53. http://dx.doi.org/10.20535/1970.55(1).2018.135892.

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9

Tereshkov, V. V., and V. M. Avanesov. "Low-frequency digital phase meter." Measurement Techniques 35, no. 4 (April 1992): 477–80. http://dx.doi.org/10.1007/bf00978964.

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Krival’, I. I., A. I. Skripnyuk, A. V. Rudkovskiy, V. A. Protsenko, and O. A. Prisyazhnyuk. "Aspects of modernization of UA Ч3-101 frequency meter." Технология и конструирование в электронной аппаратуре, no. 1-2 (2020): 3–7. http://dx.doi.org/10.15222/tkea2020.1-2.03.

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JSC «Meridian» n. a. S. P. Korolyov at one point developed and mass-produced a wide-range microwave frequency meter of the 8-mm wavelength range UA Ч3-101. Over time, however, the device has become obsolete for a number of reasons, and the question arose of the need to replace it. Since the cost of foreign models of frequency meters with similar parameters available on the market is quite high, the enterprise’s capabilities in solving this issue were considered. The analysis showed that the development of a new similar frequency meter will also be quite expensive, but the modernization of the existing one might be much cheaper, since the enterprise has all the infrastructure for serial production of the upgraded frequency meter. This article describes technical solutions for the replacement of labor-consuming microwave components of the UA Ч3-101 frequency meter, such as microstrip and waveguide input microwave converters, as well as optimization of the frequency measuring process of the input signal, which allowed us to upgrade the device according to the requirements. The use of the developed broadband small-sized frequency converter in the modernized UA Ч3-101A frequency meter made it possible to simplify the circuit and the frequency measurement process as much as possible, to use only one input microwave converter, to significantly reduce the weight and size of the device, to abandon the labor-consuming and expensive waveguide components of the device, and to double the sensitivity upgraded frequency meter. The proposed technical solution allowed simplifying the production process of the frequency meter, making the device more convenient to use. In addition, due to the optimization of circuit and design solutions in the upgraded frequency meter, it was possible to combine the counter and the gate driver on the same board, combine the reference frequency block with a 100 MHz tunable generator, abandon the switch, which allowed reducing power consumption and increasing the reliability of the device.

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Ren, Li Mian, Li Xia Wang, and Ming Zhe Wei. "Design of High-Precision Frequency Meter." Applied Mechanics and Materials 329 (June 2013): 364–67. http://dx.doi.org/10.4028/www.scientific.net/amm.329.364.

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Frequency meter measured frequency of analog periodic signal in its frequency domain and used the software control program to replace the complex outside counting circuit. ARM7 development board, LPC2103 chip, and AD9833 chip made up of a complete system. This paper gave the designing schemes of hardware and software system and analyzed experiment results, which prove that this design reaches expectant target with less hardware and simpler structure.

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12

Nemat, A. "A digital frequency independent phase meter." IEEE Transactions on Instrumentation and Measurement 39, no. 4 (1990): 665–67. http://dx.doi.org/10.1109/19.57253.

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Snodgrass, Frank E., and Robert R. Putz. "A WAVE HEIGHT AND FREQUENCY METER." Coastal Engineering Proceedings 1, no. 6 (January 29, 2011): 13. http://dx.doi.org/10.9753/icce.v6.13.

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During World War II a group of Naval officers conducted visual measurements of ocean waves simultaneously with instrumental recordings. A comparison of the visual and instrumental values indicated ".... the natural tendency for the observer .... to record not the average wave height but a wave height based on some kind of average of the highest waves. The general experience is that an observer will give a value for the wave height which represents the average of the highest 20 to 40 per cent of the waves" (SIO, 1944). The average height of the highest one-third of the waves, H1/3, was therefore suggested as the characteristic (or significant) wave height. "Characteristic wave period" was given a corresponding definition as the average period of the highest one-third waves.

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Toiviainen, Petri, and Emily Carlson. "Embodied Meter Revisited." Music Perception 39, no. 3 (February 1, 2022): 249–67. http://dx.doi.org/10.1525/mp.2022.39.3.249.

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Previous research has shown that humans tend to embody musical meter at multiple beat levels during spontaneous dance. This work that been based on identifying typical periodic movement patterns, or eigenmovements, and has relied on time-domain analyses. The current study: 1) presents a novel method of using time-frequency analysis in conjunction with group-level tensor decomposition; 2) compares its results to time-domain analysis, and 3) investigates how the amplitude of eigenmovements depends on musical content and genre. Data comprised three-dimensional motion capture of 72 participants’ spontaneous dance movements to 16 stimuli including eight different genres. Each trial was subjected to a discrete wavelet transform, concatenated into a trial-space-frequency tensor and decomposed using tensor decomposition. Twelve movement primitives, or eigenmovements, were identified, eleven of which were frequency locked with one of four metrical levels. The results suggest that time-frequency decomposition can more efficiently group movement directions together. Furthermore, the employed group-level decomposition allows for a straightforward analysis of interstimulus and interparticipant differences in music-induced movement. Amplitude of eigenmovements was found to depend on the amount of fluctuation in the music in particularly at one- and two-beat levels.

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Kondoh, Sotaro, Kazuo Okanoya, and Ryosuke O. Tachibana. "Switching perception of musical meters by listening to different acoustic cues of biphasic sound stimulus." PLOS ONE 16, no. 8 (August 30, 2021): e0256712. http://dx.doi.org/10.1371/journal.pone.0256712.

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Meter is one of the core features of music perception. It is the cognitive grouping of regular sound sequences, typically for every 2, 3, or 4 beats. Previous studies have suggested that one can not only passively perceive the meter from acoustic cues such as loudness, pitch, and duration of sound elements, but also actively perceive it by paying attention to isochronous sound events without any acoustic cues. Studying the interaction of top-down and bottom-up processing in meter perception leads to understanding the cognitive system’s ability to perceive the entire structure of music. The present study aimed to demonstrate that meter perception requires the top-down process (which maintains and switches attention between cues) as well as the bottom-up process for discriminating acoustic cues. We created a “biphasic” sound stimulus, which consists of successive tone sequences designed to provide cues for both the triple and quadruple meters in different sound attributes, frequency, and duration. Participants were asked to focus on either frequency or duration of the stimulus, and to answer how they perceived meters on a five-point scale (ranged from “strongly triple” to “strongly quadruple”). As a result, we found that participants perceived different meters by switching their attention to specific cues. This result adds evidence to the idea that meter perception involves the interaction between top-down and bottom-up processes.

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Zhang, Wei. "Based on SoC Technology Frequency Measurement Meter." Applied Mechanics and Materials 556-562 (May 2014): 2974–77. http://dx.doi.org/10.4028/www.scientific.net/amm.556-562.2974.

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SoC is the ASICS (ApplieationSpeenIetgratdeCierulst) design methodology of the new technology, refers to the embedded system as the core technology used in PI-based, set of software and hardware in one, and the pursuit of products inclusive of the largest integrated system chip. The article in-depth exploration into the complexity of using VHDL language and system programmable logic device (CPLD) to develop "system-on-chip (SoC)" - such as adaptive frequency measurement accuracy of the basic methods to overcome the system of the previous frequency measurement accuracy is not high , measuring the accuracy of the process of change, approaching the speed of slow-type shift shortcomings.

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17

Wang, Daming. "A digital frequency meter for MM waves." International Journal of Infrared and Millimeter Waves 16, no. 12 (December 1995): 2097–101. http://dx.doi.org/10.1007/bf02073412.

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Ю. М. Маринич, Ю. М. Гуменюк, and Ф. О. Іваха. "CONTINUOUS FREQUENCY METER FOR A REACTION WHEEL." MECHANICS OF GYROSCOPIC SYSTEMS, no. 26 (December 23, 2013): 39–43. http://dx.doi.org/10.20535/0203-377126201330671.

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The usage of reaction wheels as executive parts for control systems of angular orientation and stabilization of spacecraft remains the most widespread method of angular control for a satellite. To create highly effective control system rigid demands are pulled out for reaction wheels such as mass-size characteristic, proportionality of reaction momentum to control signal and minimization power losses during energy transformation.The biggest errors in recreation of control law of reaction wheels take place during rotor angular velocity sign change, as in this moment compensation systems do not decrease but increase the influence of back EMF and friction momentum until the moment the information about angular velocity is renovated. When the angular velocity crosses the null pulsation of reaction momentum takes place. This problem is more important for reaction wheels of micro- and nano- level, as their small size limits the number of poles of the magnetic system and thus the number of information renovation points is small.The article is dedicated to the method of formation of quasi-stationary signal of rotor rpm of compact reaction-wheel, built on the basis of 2-and 4-pole three-phase brushless DC motors. The proposed approach allows the use of rotor position sensor signals to form a signal of rotor rpm of reaction-wheel and eliminate the error of reproduction of control law for reaction-wheel when the sign of the angular velocity of rotation of the rotor changes.

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Xu, Chun Yan, Wu Ai, and Jing Tao Wu. "A Design of Different-Frequency Grounding Resistance Meter." Applied Mechanics and Materials 668-669 (October 2014): 762–66. http://dx.doi.org/10.4028/www.scientific.net/amm.668-669.762.

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This paper introduces a design of different-frequency grounding resistance meter using MCU 80C196KB as the core. This instrument generates a current with a different frequency at about 120Hz to be injected into the ground grid. By adopting current-voltage method, the design enables an accurate measurement of the grounding resistance of large-scale ground grid, such as, power systems, architectural buildings, military facilities, and airports. The instrument controls the output of different-frequency electrical source by using MCU and DDS techniques. Moreover, the utilization of RMS-DC devices simplifies its data acquisition and data processing. In addition, the application of hardware and software filtering technology reduces the measurement error which may be caused by frequency interference, measuring disturbing between lead wires.

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Wang, Peng, Chang Jia Yan, Tong Niu, Xue Fang, Zhi Peng Jin, and Bo Shi Guan. "Frequency Meter with Equal Precision Based FPGA + MCU." Applied Mechanics and Materials 614 (September 2014): 308–11. http://dx.doi.org/10.4028/www.scientific.net/amm.614.308.

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Aiming at such disadvantages of traditional frequency measurement technology as low precision and small measurement range, the combination of FPGA and MCU is applied in this paper to realize equal precision frequency measurement. The system makes full use of advantages FPGA, which has high speed and multi-I/O port, and MCU which has good man-machine interface and flexible control function. By controlling the time of enable signal allowed frequency measurement equal to integer cycles of measured signal, the frequency measurement accuracy can keep constant in the whole measurement range. The frequency measurement range of meter is 0.1 Hz~ 50 MHz, and the accuracy of frequency measurement is 10-6 Hz. In addition to measuring frequency, the system also can detect the period, pulse width and duty ratio. The simulation and experimental results show that the frequency meter has such advantages as compact structure, small volume, high reliability and precision and wide frequency measurement range.

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Basano, L., and P. Ottonello. "New Heat Rate Meter Based on Frequency Grading." IEEE Transactions on Biomedical Engineering BME-32, no. 1 (January 1985): 89–91. http://dx.doi.org/10.1109/tbme.1985.325638.

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Ahmad, Wasim. "A Simple Pulse-Duration or Frequency-Deviation Meter." IETE Technical Review 4, no. 6 (June 1987): 249–50. http://dx.doi.org/10.1080/02564602.1987.11438127.

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Couturier, Luc, Ingo Nosske, Fachao Hu, Canzhu Tan, Chang Qiao, Y. H. Jiang, Peng Chen, and Matthias Weidemüller. "Laser frequency stabilization using a commercial wavelength meter." Review of Scientific Instruments 89, no. 4 (April 2018): 043103. http://dx.doi.org/10.1063/1.5025537.

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Bishop, Richard. "Using the BBC micro as a frequency meter." Physics Education 24, no. 1 (January 1, 1989): 41–43. http://dx.doi.org/10.1088/0031-9120/24/1/313.

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Li, Junlang, and Teng Zhang. "Study of acceleration measurement in gravitational wave detection." Classical and Quantum Gravity 39, no. 5 (February 10, 2022): 055007. http://dx.doi.org/10.1088/1361-6382/ac4b98.

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Abstract Position-meter and speed-meter interferometers have been analysed for detecting gravitational waves. Speed-meter is proposed to reduce the radiation pressure noise, which is dominant at low frequency. We introduce the concept of acceleration measurement in comparison with position and speed measurement. In this paper, we describe a general acceleration measurement and derive its standard quantum limit. We provide an example of an acceleration-meter interferometer configuration. We show that shot noise dominates at low frequency following a frequency dependence of 1/Ω2, while radiation pressure noise is constant. The acceleration-meter has even a stronger radiation pressure noise suppression than speed-meter.

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Banta, L. E., and Y. Xia. "A ROM-based high-accuracy line frequency and line frequency deviation meter." IEEE Transactions on Instrumentation and Measurement 39, no. 3 (June 1990): 535–39. http://dx.doi.org/10.1109/19.106288.

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Saleh, Khaldoun, Jacques Millo, Alexandre Didier, Yann Kersalé, and Clément Lacroûte. "Frequency stability of a wavelength meter and applications to laser frequency stabilization." Applied Optics 54, no. 32 (November 4, 2015): 9446. http://dx.doi.org/10.1364/ao.54.009446.

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OSADCHUK, Alexsandr, Jaroslav OSADCHUK, and Valentin SKOSCHUK. "MULTICHANNEL FREQUENCY METER ON A PROGRAMMABLE LOGICAL INTEGRATED CIRCUIT FOR A RADIOMEASURING SYSTEM WITH FREQUENCY SENSORS." Herald of Khmelnytskyi National University 303, no. 6 (December 2021): 186–94. http://dx.doi.org/10.31891/2307-5732-2021-303-6-186-194.

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The paper presents the development of a multi-channel frequency measurement system on FPGA by Altera Cyclone IV, the main task of which is to measure the informative parameter of sensors of physical quantities with frequency output. Based on the analysis of existing multi-channel frequency measurement systems on the FPGA, it is established that it is advisable to use multi-channel frequency meters for simultaneous measurement of several frequencies. Unlike several frequency meters operating simultaneously, multi-channel frequency meters perform measurements in a single time base, which is provided by a common exemplary generator and timer. A multi-channel universal FPGA-based measuring device has been developed, which has 12 measuring channels for frequency output sensors and supports simultaneous operation of 127 digital sensors via I2C interface. Therefore, theoretically, data transmission from the developed device can be carried out wirelessly. The developed device can be connected to a personal computer via a UART-USB converter. As a chip for the implementation of the frequency meter is used FPGA company Altera EP4CE10F17C8 – a chip in the BGA case, which has 179 pins. The parameters, namely the value of the signal propagation delay, determine the maximum measured frequency, in our case about 3 ns (delay of the signal from the input to the internal register), which corresponds theoretically to 333 MHz. Specialized software has been developed to test the efficiency of a multi-channel measuring system for measuring informative parameters obtained from radio measuring transducers, based on the reactive properties of semiconductor structures with negative resistance. For convenience of perception, there is a visualization of the received information from the measuring device.

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Zheng, Wei Qiang. "Design and Implementation of Digital Frequency Meter Based on SCM." Applied Mechanics and Materials 687-691 (November 2014): 3466–69. http://dx.doi.org/10.4028/www.scientific.net/amm.687-691.3466.

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The digital frequency meter was a device to detect and display the frequency. In many design complexity, features a variety of electronic devices, the digital frequency meter was one of the essential equipment. It was widely used in various fields. The core of the frequency meter is AT89C51 microcontroller. It used SCM counting and timing functions to achieve the measurement pulse within a certain gate time, and it uses LED digital display tube displays the measured frequency. The device has a high frequency accuracy measurement, real time, and it has a simple, easy to carry, strong expansion capability, a wide range.

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Rudianto, Agus, Ricky Susiono, and Ika Novitaria Marani. "HUBUNGAN FREKUENSI LANGKAH DAN PANJANG TUNGKAI DENGAN HASIL LARI 60 METER MAHASISWA FAKULTAS ILMU OLAHRAGA UNIVERSITAS NEGERI JAKARTA 2018." Jurnal Ilmiah Sport Coaching and Education 4, no. 1 (January 10, 2020): 14–22. http://dx.doi.org/10.21009/jsce.04103.

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ABSTRAK Tujuan penelitian ini adalah untuk mengetahui Hubungan antara Frekuensi Langkah dengan Hasil Lari 60 Meter, Hubungan Antara Panjang Tungkai dengan Hasil Lari 60 Meter, dan secara bersama-sama Hubungan antara Frekuensi Langkah dan Panjang Tungkai dengan Hasil Lari 60 Meter Mahasiswa Fakultas Ilmu Olahraga 2018.Penelitian ini dilaksanakan di Stadion Atletik Velodrome Jakarta Timur. Metode yang digunakan ialah deskriptif kuantitatif dengan menggunakan studi korelasi. Sampel yang digunakan berjumlah 30 orang, dengan teknik pengambilan sampel yaitu purposive sampling dari populasi yang ada dari Mahasiswa Fakultas Ilmu Olahraga 2018. Hubungan panjang tungkai terhadap hasil lari 60 meter dinyatakan dalam persamaan regresi Y= 43,29 + 0,13 X₁, dengan koefisien korelasi = 0,134. Dalam proses uji keberartian koefisien korelasi tersebut didapati thitung= 0,715 < ttabel= 1,701 dengan demikian koefisien korelasi bernilai 0,134 tidak signifikan. Hubungan daya ledak otot tungkai terhadap hasil lari 60 meter dinyatakan dalam persamaan regresi Y= 18,34 + 0,63 X2, dengan koefisien korelasi = 0,633. Dalam proses uji keberartian koefisien korelasi tersebut didapati thitung= 4,328 > ttabel= 1,701 dengan demikian koefisien korelasi bernilai 0,633 signifikan. Hubungan frekuensi langkah dan panjang tungkai secara bersama sama dengan hasil lari 60 meter dinyatakan dalam persamaan regresi Y = 7,5 + 0,20 X₁ + 0,65 X₂ dengan koefisien korelasi = 0,915. Dalam proses uji keberartian koefisien korelasi tersebut didapati Fhitung= 70,29 > Ftabel= 3,35 yang menunjukkan bahwa hipotesis nihil (Ho) ditolak dan hipotesis alternatif (H1) diterima. Maka didapat kesimpulan bahwa terdapat hubungan yang signifikan antara frekuensi langkah dan panjang tungkai secara bersama-sama dengan hasil lari 60 meter mahasiswa fakultas ilmu olahraga 2018. Kata Kunci: Frekuensi Langkah, Panjang Tungkai, Lari 60 Meter ABSTRACT The purpose of this study was to determine the relationship between step frequency and 60 meter running results, the relationship between leg length and 60 meter running results, and the relationship between step frequency and leg length with 60 meter run results for the 2018 Faculty of Sport Sciences Students. This research was conducted at East Jakarta Velodrome Athletic Stadium. The method used is descriptive quantitative by using correlation studies. The sample used amounted to 30 people, with a sampling technique that is purposive sampling from the existing population of 2018 Faculty of Sport Sciences Students. The relationship of leg length to the 60 meter running result is expressed in the regression equation Y = 43.29 + 0.13 X₁, with the correlation coefficient y ry〗 _1 = 0.134. In the process of testing the significance of the correlation coefficient found t = 0.715 <t table = 1.701 thus the correlation coefficient is 0.134 is not significant. The relationship of leg muscle explosive power to the 60 meter running results is expressed in the regression equation Y = 18.34 + 0.63 X2, with a correlation coefficient y ry〗 _2 = 0.633. In the process of testing the significance of the correlation coefficient found tcount = 4.328> ttable = 1.701 thus the correlation coefficient is 0.633 significant. The relationship between stride frequency and leg length together with the 60 meter run result is expressed in the regression equation Y = 7.5 + 0.20 X₁ + 0.65 X₂ with a correlation coefficient y ry〗 _ (1-2) = 0.915. In the process of testing the significance of the correlation coefficient found Fcount = 70.29> Ftable = 3.35 which indicates that the null hypothesis (Ho) is rejected and the alternative hypothesis (H1) is accepted. Then it can be concluded that there is a significant relationship between the frequency of steps and leg length together with the 60 meter running results of the 2018 faculty of sports students. Keywords: Step Frequency, Leg Length, Running 60 Meters

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Qing, Bai Yuan, Gang Li, Bo Zeng, and Zhao Sheng Teng. "Single-Phase Prepayment Meter Based on RFID+STS." Applied Mechanics and Materials 333-335 (July 2013): 2384–90. http://dx.doi.org/10.4028/www.scientific.net/amm.333-335.2384.

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The emergence of the radio frequency type prepayment meter will guide the inhabitant energy meter management toward automation from IC card management and the artificial metering work. In this paper, it introduces the principle of the single-phase prepayment meter based on radio frequency identification (RFID), develops a method of energy sale management that integrates radio frequency identification and IEC62055-41 standard transfer specification (STS), and designs its hardware and software. This design makes full use of the advantages that radio frequency card is passivity and non-contact, and STS is a sound and versatile specification. The production practices shows that the radio frequency card reads and writes stably, has strong ability of anti-interference, delivers data credibly, and the management is real-time and convenience.

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González Riaño, Oscar Julian, Brayan Andres Vega Valencia, and César Alexander Chacón Cardona. "Permittivity experimental determination as a frequency function." Tecnura 24, no. 64 (April 1, 2020): 34–47. http://dx.doi.org/10.14483/22487638.16533.

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Objective: To determine the behavior of dielectric permittivity of class II ceramic capacitor in function of frequency up to 10MHz. Context: in telecommunications and high frequency circuits is necessary to take into account the diminishing of permittivity on dielectrics of ceramic capacitors with the frequency growth, two quantitative methods are proposed to determine this behavior. Method: First, the impedance meter bridge FLUKE PM5306 was used in the frequency range from 10^2 Hz to 10^5 Hz; and second, a novel low-cost electronic circuit for the frequency range between 10^4 Hz to 10^7. Results: The results from the circuit were validated using the impedance meter bridge RLC FLUKE PM 6306. The measure of the complex capacitance from three capacitors and their loss tangent were obtained. Conclusions: The capacitance decreasing with the increment of the frequency was observed in the impedance meter bridge and the implemented circuit, finding a convergence between both methods in the common frequency region.

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Hou, Tao, and Yan Hong Guo. "Research of Calibration Instrument of Multi-Site Single-Phase Energy Meter." Applied Mechanics and Materials 273 (January 2013): 424–27. http://dx.doi.org/10.4028/www.scientific.net/amm.273.424.

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This design is a full-featured, high precision power meter on-site calibration device and integrated electrical parameter measuring device. The internal use of SCM control, you can not open the instrument case, through the keys with precision adjustment, thus increasing the reliability and stability. This study projects able to keep the case of electricity meters for a variety of electrical power meter, indicating a variety of instrumentation and electrical power transmitters to provide on-site instruments detection, but also to voltage, current, power, power factor, phase, frequency and other electrical parameters measurement.

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Kononov, S. P., and A. A. Nehur. "Frequency Determination Method of the Sweep-Generator of the Panoramic Frequency Characteristics Meter." Visnyk NTUU KPI Seriia - Radiotekhnika Radioaparatobuduvannia, no. 70 (September 30, 2017): 23–29. http://dx.doi.org/10.20535/radap.2017.70.23-29.

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Nemat, A. "A high resolution digital frequency meter for low frequencies." IEEE Transactions on Instrumentation and Measurement 39, no. 4 (1990): 667. http://dx.doi.org/10.1109/19.57254.

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ABDUL-NIBY, M. M., and R. S. FYATH. "Wideband frequency-invariant phase meter with lead-lag indication." International Journal of Electronics 62, no. 1 (January 1987): 141–44. http://dx.doi.org/10.1080/00207218708920960.

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KADHIM, KADHIM N., and MAJID A. H. ABDUL-KARIM. "Digital power factor meter based on digital frequency divider." International Journal of Electronics 65, no. 1 (July 1988): 111–16. http://dx.doi.org/10.1080/00207218808945209.

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Fang, Yi-yuan. "Design of Equal Precision Frequency Meter Based on FPGA." Engineering 04, no. 10 (2012): 696–700. http://dx.doi.org/10.4236/eng.2012.410089.

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László, Tolnai, and Marczy László. "A simple and accurate contactless frequency and amplitude meter." Review of Scientific Instruments 68, no. 2 (February 1997): 1303–6. http://dx.doi.org/10.1063/1.1147888.

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Porshnev, S. V. "Effects of signal duration on analytical frequency meter accuracy." Measurement Techniques 43, no. 3 (March 2000): 276–80. http://dx.doi.org/10.1007/bf02503526.

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Puchkov, E. V., A. A. Rezchikov, and N. V. Bychkov. "Independent verification of attenuation meter linearity at intermediate frequency." Measurement Techniques 28, no. 1 (January 1985): 87–89. http://dx.doi.org/10.1007/bf00861111.

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Sun, Haixin, Yujie Fan, and Qiang Xiang. "Design of SOPC digital frequency meter based on MicroBlaze." Journal of Physics: Conference Series 1732 (January 2021): 012164. http://dx.doi.org/10.1088/1742-6596/1732/1/012164.

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Lee, Jihoon, Seungwook Yoon, and Euiseok Hwang. "Frequency Selective Auto-Encoder for Smart Meter Data Compression." Sensors 21, no. 4 (February 22, 2021): 1521. http://dx.doi.org/10.3390/s21041521.

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With the development of the internet of things (IoT), the power grid has become intelligent using massive IoT sensors, such as smart meters. Generally, installed smart meters can collect large amounts of data to improve grid visibility and situational awareness. However, the limited storage and communication capacities can restrain their infrastructure in the IoT environment. To alleviate these problems, efficient and various compression techniques are required. Deep learning-based compression techniques such as auto-encoders (AEs) have recently been deployed for this purpose. However, the compression performance of the existing models can be limited when the spectral properties of high-frequency sampled power data are widely varying over time. This paper proposes an AE compression model, based on a frequency selection method, which improves the reconstruction quality while maintaining the compression ratio (CR). For efficient data compression, the proposed method selectively applies customized compression models, depending on the spectral properties of the corresponding time windows. The framework of the proposed method involves two primary steps: (i) division of the power data into a series of time windows with specified spectral properties (high-frequency, medium-frequency, and low-frequency dominance) and (ii) separate training and selective application of the AE models, which prepares them for the power data compression that best suits the characteristics of each frequency. In simulations on the Dutch residential energy dataset, the frequency-selective AE model shows significantly higher reconstruction performance than the existing model with the same CR. In addition, the proposed model reduces the computational complexity involved in the analysis of the learning process.

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Kalandarov, Palvan I. "High-frequency moisture meter for grain and grain products." Izmeritel`naya Tekhnika, no. 4 (2022): 65–71. http://dx.doi.org/10.32446/0368-1025it.2022-4-65-71.

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Souza, Wander de, Orlando Rus Barbosa, Jair de Araújo Marques, Eliane Gasparino, Ulysses Cecato, and Leandro Martins Barbero. "Behavior of beef cattle in silvipastoral systems with eucalyptus." Revista Brasileira de Zootecnia 39, no. 3 (March 2010): 677–84. http://dx.doi.org/10.1590/s1516-35982010000300029.

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It was aimed to verify the effect of the presence of trees and their heights in silvipastoral system on the intake behavior of Nellore heifers in the summer. Ten heifers for the following systems were used: system without shade, silvipastoral system with 8-meter and 18-meter trees. The data were collected in three days during 12 hours, subdivided in morning (7:15 a.m. to 1. p.m.) and afternoon (1:15 p.m. to 7 p.m.). It was evaluated the times and frequency of grazing, rumination, idle and the percentage of time that the animals remained in the shade; black globe-humidity index, whose average and minimum values (86 and 82) were equal for 8-meter tree system and 18-meter tree system; however they were lower when compared to the without shade system (89 and 86). There was an interaction between the systems and the periods for all the analyzed variables, except for the rumination frequency. For system without shade, the grazing time did not differ between morning (202 min) and afternoon (187 min); however the grazing frequency was lower for the afternoon (3.17). For 8-meter trees systems and 18 meter trees system, the grazing time in the afternoon, respectively, with 195.50 and 219.00 min was higher than in the morning, respectively, with 128.00 and 158.50 minutes. The rumination time was higher in the morning for all systems. The grazing frequency for 8-meter trees was 3.58, for the without shade system it was 3.05 and for 18-meter tree system it was 2.22. A higher idle time and the idle frequency was found in system without shade (97.50 min and 3.80 respectively) in the afternoon. For 8-meter tree system (98.50 min and 4.47 respectively) and 18-meter tree system (127.00 min and 4.27 respectively), they were higher in the morning. The animals remained under shade for an average of 43.49% (with trees with 8 m) and 49.81% (with trees with 18 m) of the time. It was concluded that the presence of trees modify the time and the frequency in grazing and idle; however, it does not influence the time and frequency in rumination.

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Gupta, S. P., R. Sekar, and Y. B. Acharya. "In situ measurements of sub-meter plasma waves over low-latitude ionosphere during Leonid-99 meteor storm." Annales Geophysicae 22, no. 6 (June 14, 2004): 2033–36. http://dx.doi.org/10.5194/angeo-22-2033-2004.

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Abstract. In situ probe measurements of plasma parameters were carried out on 18 and 20 November 1999 from Sriharikota, India, a low-latitude rocket launching station to investigate the effect of a Leonid meteor storm. Results obtained on plasma waves using a high frequency Langmuir probe are discussed. The characteristics of the sub-meter scale size plasma waves observed for the first time during Leonid meteor storm are presented. Based on the results obtained from both the rocket flights and comparison with the results obtained from previous rocket flights from the same location, it appears these sub-meter waves are associated with intense meteoric activity. A possible mechanism based on the dependence of the meteoric activity and its limitations are discussed.

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Nozaradan, Sylvie. "Exploring how musical rhythm entrains brain activity with electroencephalogram frequency-tagging." Philosophical Transactions of the Royal Society B: Biological Sciences 369, no. 1658 (December 19, 2014): 20130393. http://dx.doi.org/10.1098/rstb.2013.0393.

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The ability to perceive a regular beat in music and synchronize to this beat is a widespread human skill. Fundamental to musical behaviour, beat and meter refer to the perception of periodicities while listening to musical rhythms and often involve spontaneous entrainment to move on these periodicities. Here, we present a novel experimental approach inspired by the frequency-tagging approach to understand the perception and production of rhythmic inputs. This approach is illustrated here by recording the human electroencephalogram responses at beat and meter frequencies elicited in various contexts: mental imagery of meter, spontaneous induction of a beat from rhythmic patterns, multisensory integration and sensorimotor synchronization. Collectively, our observations support the view that entrainment and resonance phenomena subtend the processing of musical rhythms in the human brain. More generally, they highlight the potential of this approach to help us understand the link between the phenomenology of musical beat and meter and the bias towards periodicities arising under certain circumstances in the nervous system. Entrainment to music provides a highly valuable framework to explore general entrainment mechanisms as embodied in the human brain.

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Zhao, Hui. "Hierarchy Design of Digital System Based on EDA Technology." Applied Mechanics and Materials 538 (April 2014): 297–300. http://dx.doi.org/10.4028/www.scientific.net/amm.538.297.

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The hierarchy design method of digital system based on EDA is proposed through the design of digital frequency meter system in this paper. Firstly, it divides the frequency meter into different function module and Writes VHDL code to describe each module circuit. Then, it creates the schematic diagram of top circuit. Design input, compiled, logic synthesize and function simulation are accomplished use MAX+PLUS II. In the end, digital frequency meter is implemented in CPLD. The results show that the design method can greatly simplify the complexity of hardware circuit structure. Its characteristic is high reliability and strong flexibility.

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Feng, Ji Qin, Min Wu, Jin Lu, and Zi Ran Chen. "Design of Wireless Network Intelligent Gas Meter." Advanced Materials Research 472-475 (February 2012): 1135–40. http://dx.doi.org/10.4028/www.scientific.net/amr.472-475.1135.

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According to gas meter, including the traditional mechanical meter, IC card meter ,has the drawbacks of meter reading inconvenience and no control table function, The design of a intelligent network gas meter has the wireless transceiver function, adopted the single-chip radio frequency transceiver chip CC2500, not only simplify the meter reading process, and promote the automatic management of gas company. The wireless network intelligent gas meter system has stable performance, low power consumption, reliable communications, good anti-jamming performance.

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Wahjono, Endro, Mochammad Machmud Rifadil, Ony Asrarul Qudsi, and Muhammad Nur Sururi. "Meter Daya 1 Fasa Dengan Proteksi Over Voltage Dan Under Voltage berbasis Internet of Things (IoT)." INOVTEK - Seri Elektro 2, no. 2 (August 28, 2020): 121. http://dx.doi.org/10.35314/ise.v2i2.1384.

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This research discusses about design and implementation of the power meters which are equipped with over or under voltage relays at 1 phase load based on internet of things (IoT). The power meters use power sensors that can detect active power values (P), apparent power (S), voltage (V), current (I), power factor (PF), frequency, energy, and total harmonic distortion (THD). Data on the power meter will be sent and stored in the database. Data on the power meters can also be monitored remotely via smartphones and personal computers using internet media. The power meters are equipped with indicators for over voltage, normal and under voltage conditions. This power meter is also equipped with a relay to disconnect the power at the load when there is interference with over voltage or under voltage on the system. From the results of tests that have been carried out, the relay will cut the load when there is interference with over voltage or under voltage on the system. Based on the results of testing that has been done, the design of the power meter made in this research had an average error of 0.0562% for resistive load and has the largest data readout error is 9.255% for non-linear load.

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Journal articles on the topic 'Frequency meter'

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