High-precision electrical signal frequency measurement method and device

A frequency measurement and electrical signal technology, applied in the field of high-precision electrical signal frequency measurement methods and devices, can solve problems such as large amount of calculation, difficult to understand, large data error, etc., and achieves complex calculation and low difficulty in development and maintenance. Effect

Active Publication Date: 2019-06-11
SHENZHEN CLOU ELECTRONICS
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Problems solved by technology

The method of counting method and week measuring method is simple and easy to realize, but the error of the measured data is large, which is not suitable for occasions requiring high precision. The algorithms of minimum absolute value approximation and Newton's algorithm are complex, difficult to understand, and require a large amount of calculation

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  • High-precision electrical signal frequency measurement method and device
  • High-precision electrical signal frequency measurement method and device
  • High-precision electrical signal frequency measurement method and device

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Embodiment Construction

[0023] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only some structures related to the present invention are shown in the drawings but not all structures.

[0024] Please refer to figure 1 , an embodiment of the present invention provides a high-precision electrical signal frequency measurement method, including:

[0025] S1, acquiring an electrical signal to be measured;

[0026] S2, the number of sampling points of the integer part of the electrical signal is obtained by means of zero crossing;

[0027] S3, performing linear interpolation at the zero-crossing point to obtain the interpolated complete electrical signal, and using a linear interpolation formula to o...

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Abstract

The invention discloses a high-precision electric signal frequency measurement method. The high-precision electric signal frequency measurement method comprises the following steps: S1, acquiring an electric signal to be measured; S2, obtaining a sampling point number of an integer part of the electric signal in a zero crossing point manner; S3, carrying out linear interpolation on a zero crossing point part to obtain a complete electric signal after interpolation, and obtaining a decimal point part of the sampling point number after the interpolation by adopting a linear interpolation formula; and S4, overlapping the sampling point number of the decimal point part and a sampling point of the integer part so as to obtain a total sampling point number, and dividing a sampling frequency by the total sampling point number to obtain a needed frequency value of the electric signal. The invention further provides a high-precision electric signal frequency measurement device.

Description

【Technical field】 [0001] The invention relates to the field of power metering, in particular to a high-precision electric signal frequency measurement method and a device thereof. 【Background technique】 [0002] The power metering and verification device is the metering equipment of the current smart grid. The metering error is an important parameter for the performance evaluation of the metering device, and the frequency is the key parameter of its measurement. Therefore, improving the accuracy of the frequency measurement plays a vital role in the control of the error. role. With the advancement of science and technology, the requirements for the accuracy of equipment are getting higher and higher. Frequency measurement is one of the most basic measurements in electronic measurement technology. Improving the accuracy of frequency measurement is the premise of improving the accuracy of amplitude and phase calculations. [0003] At present, the frequency measurement methods...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R23/02
CPCG01R23/02
Inventor 钱亮
Owner SHENZHEN CLOU ELECTRONICS
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