Frequency measurement research with weight averaging of pulse output signal of voltage-to-frequency converter

Dorozhovets, M.; Pawłowski, E.; Świsulski, Dariusz

doi:10.1016/j.measurement.2023.112912

Cited by 6 publications

(3 citation statements)

References 12 publications

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“…Shows a graph of the results of temperature measurements between the designed tool thermometer and the reference thermometer at a transmitter frequency of 107.9 MHz. The graph shows that the level of accuracy of measurement results between the design tool and the reference tool is very good, this is shown in the equation y = 0.9982x -0.1839, where the coefficient of termination (R 2 ) shows the number 0.9999 which means the accuracy between the design tool and the reference tool reaches 99% (Dorozhovets et al, 2023;Kirianaki et al, 2000).…”

Section: Nomentioning

confidence: 97%

Design of remote temperature monitoring system tool using VHF waves based on VFC LM331

Wibawa

Putra

2023

irjeis

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A remote temperature monitoring system has been designed and manufactured using VHF waves based on VFC LM331. This remote temperature monitoring system uses the IC LM35 temperature sensor. The technique used for sending data uses radio waves on VHF lines with an OOK (On-Off Keying) modulation system. So that the analogue voltage signal from the sensor can be modulated and transmitted by the transmitter, the voltage must be converted to frequency using a VFC LM331. From the results of measuring the accuracy of the design tool, it was found that the design tool worked well at a temperature of 0 oC up to 99% compared to a reference device. The range of the system that has been designed is much influenced by the frequency of the transmitter used, the more users on that frequency, the shorter the range. The farthest distance that can be reached is around 120 meters at a frequency of 80 MHz while at a frequency of 89 – 106.3 MHz it can only reach around 48 meters.

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Section: Nomentioning

confidence: 97%

Design of remote temperature monitoring system tool using VHF waves based on VFC LM331

Wibawa

Putra

2023

irjeis

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“…The frequency itself can also provide information about the examined phenomenon, such as, for instance, the stability of power grid operation, the variability of the voltage generated by photovoltaic inverters, power plant frequency control capabilities [9], etc. The frequency of the signal can be directly processed into numerical values [6,10], but in the case of time-varying values, this issue is still the subject of many publications [1,[11][12][13][14][15][16] and research on new solutions [17][18][19][20][21][22][23][24]. The intensity of the research is favored by: high availability of converters of physical quantities into frequency (X/f) [25], low sensitivity of the information transmission channel using the frequency signal to electromagnetic interference and amplitude attenuation [26,27], high accuracy of constant frequency measurement, and widely available programmable systems containing counters enabling high accuracy frequency measurement [28,29].…”

Section: Introductionmentioning

confidence: 99%

“…The quotient of the number of summed pulses and the measurement time is an approximation of the measured frequency. In the case of period measurement, the pulses from the reference generator are summed up during the full period of the processed signal [17].…”

Section: Introductionmentioning

confidence: 99%

Implementation of an Adaptive Method for Changing the Frequency Division of the Counter Clock Signal in a Frequency-to-Code Converter

Świsulski

Warda

2023

Energies

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Processing physical quantities into an indirect signal is a standard method of transferring information about the measured quantity to the master system, which analyzes the data obtained from the acquisition system. The intermediate signal is very often the voltage, but another transmission medium can be the frequency of the output signal of the “physical quantity-to-frequency” converter. The article presents the implementation of the adaptive method of selecting the clock signal frequency of the counter working in the converter. The issue of selecting the clock signal frequency for the required processing range of the transducer is discussed in detail. The application of the method using the STM32L476RG microcontroller is presented. The principle of checking the processing range of the developed transducer model is discussed. The algorithms of transducer operation in basic and adaptive modes of measuring the period of the variable frequency signal are proposed. The results of operation, in both modes, of the transducer model of frequency processing are presented, along with the metrological analysis of the results. The influence of selected approximations used to reconstruct the measured quantity on the final presentation of the measurement result is discussed.

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A high-precision frequency measurement method combining π-type delay chain and different frequency phase coincidence detection

Du,

2023

Analog Integr Circ Sig Process

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Frequency measurement research with weight averaging of pulse output signal of voltage-to-frequency converter

Cited by 6 publications

References 12 publications

Design of remote temperature monitoring system tool using VHF waves based on VFC LM331

Design of remote temperature monitoring system tool using VHF waves based on VFC LM331

Implementation of an Adaptive Method for Changing the Frequency Division of the Counter Clock Signal in a Frequency-to-Code Converter

A high-precision frequency measurement method combining π-type delay chain and different frequency phase coincidence detection

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