Method and system for automatically calibrating electrical instrument

An instrument, automatic calibration technology, applied in the direction of instruments, measuring electrical variables, measuring devices, etc., can solve the problems of low calibration accuracy of instruments and complicated calibration process, and achieve high calibration accuracy, improve production efficiency, and shorten production cycles. Effect

Inactive Publication Date: 2009-12-02
SHENZHEN CLOU ELECTRONICS
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Problems solved by technology

[0003] In order to solve the technical problems of low instrument calibration accuracy and complicated calibration process in the prior art, the present invention provides a method and system for automatically calibrating electric power instruments and meters

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  • Method and system for automatically calibrating electrical instrument
  • Method and system for automatically calibrating electrical instrument
  • Method and system for automatically calibrating electrical instrument

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Embodiment Construction

[0023] The present invention is described in detail below in conjunction with accompanying drawing and embodiment:

[0024] see figure 1 , the method for automatically calibrating electric power instruments and meters includes steps: the first step, initializing the calibration state, setting the calibration flag Flag of the calibration meter to false; setting the calibration guarantee accuracy β, and then setting the number of consecutive valid data N, when N consecutive times are When the error value e between the calibration meter and the reference value of the standard electric energy meter is less than the calibration guarantee accuracy β, write the correction value η into the calibration meter, where η=(m 1 +m 2 +...+m n ) / N; set the valid number of times of the read standard table k=0; the second step, if the valid number of times kBZ ; The third step is the self-test of the instrument to be calibrated to obtain the measured value V of the instrument to be calibrated,...

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Abstract

The invention provides a method and a system for automatically calibrating an electrical instrument. The system comprises a PC, an automatic calibration device controlled by the PC and an instrument hanging table for fixing the instrument to be calibrated. The PC sets a calibration proposal, controls the calibration device to calibrate calibrated instruments synchronously, and controls the calibration device to automatically retest the amplitude, phase, power, frequency and electrical error of the calibrated instrument, automatically store test data and generate test report after the calibration is finished. The method and the system solve the problem of the prior art of low instrument calibration precision and complex calibration process, realize automatic calibration and retest of the high-precision electrical instrument, ensure calibration precision and improve production efficiency.

Description

【Technical field】 [0001] The invention belongs to the field of electric instruments and meters, and in particular relates to a method and system for automatically calibrating electric instruments and meters. 【Background technique】 [0002] At present, high-precision power instruments and meters, such as single-phase and three-phase multi-functional standard electric energy meters, and single-phase and three-phase on-site calibrators, are widely used in power systems. Due to the high measurement accuracy and large range of such instruments, the calibration process is complicated. The traditional manual calibration method relies on the adjuster to visually observe the standard value and send it to the table to be adjusted. After comparing the error, the corrected value is obtained and the calibration is repeated. The manual calibration method is inefficient in calibration, the calibration accuracy is not high, and the calibration period is long. . 【Content of invention】 [...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R35/00G01R35/04
Inventor 李鹏飞
Owner SHENZHEN CLOU ELECTRONICS
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