Electrical measurement instrument model calibrating method and system
A calibration method and electrical measurement technology, applied in the direction of instruments, measuring devices, measuring electrical variables, etc., can solve the problems of high cost, low efficiency, and many measurement parameters, and achieve the effect of low cost, simple structure, and high efficiency
Active Publication Date: 2014-09-24
ANHUI RESOURCE SAVING & ENVIRONMENTAL TECH CO LTD
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Problems solved by technology
There are many types of modern electrical measuring instruments and many measurement parameters. A multi-functional direct calibration system composed of dozens or even more standard sources or high-precision instruments must meet the calibration needs. The structure is complex and the cost is high.
For multi-parameter measuring instruments, the direct calibration method is cumbersome and inefficient
The structure of the multifunctional direct calibration system of electrotechnical measuring instruments and the problems of direct calibration methods have become the main technical bottleneck restricting the development of modern electrotechnical measurement science.
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[0026] A method for calibrating a model of an electrical measuring instrument, the method comprising the steps in the following order: the first step is to simultaneously measure the standard sinusoidal signal output by the programmable three-phase sinusoidal voltage source PPS2 with a high-precision digital voltmeter HADVM and the instrument to be calibrated, and use a direct The calibration result of the instrument to be calibrated for sinusoidal voltage measurement is obtained by the comparison method; the second step is to connect the non-sinusoidal voltage signal output by the programmable three-phase non-sinusoidal voltage source PPS1 to the variable standard network impedance VSNI, and the non-sinusoidal voltage is calibrated by the instrument to be calibrated , non-sinusoidal current signals are measured to obtain relevant parameters; the third step is to input the calibration results obtained in step 1, the standard impedance parameters of variable standard network impe...
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The invention relates to an electrical measurement instrument model calibrating method. The method comprises the following sequence steps of: obtaining a calibrating result that a calibrated instrument measures a sinusoidal voltage by adopting a direct comparison method; measuring a non-sinusoidal voltage and a non-sinusoidal current signal by the calibrated instrument to obtain related parameters; and inputting the calibrating result obtained in the step 1, a standard impedance parameter of a variable standard network impedance VSNI and the related parameters obtained in the step 2 into an electrical multifunctional model calibrating data processor DPEMFMC to obtain a model calculating result and comparing the model calculating result with the related parameters obtained in the step 2 to obtain a final calibrating result. The invention also discloses an electrical measurement instrument model calibrating system. Compared with dozens, even more of standard sources or high precision instruments, the electrical measurement instrument model calibrating system has lower cost and simple structure. Meanwhile, compared with a conventional multifunctional direct calibrating method, the measurement method disclosed by the invention has the advantages , simple and easy operation, high efficiency and the like.
Description
technical field [0001] The invention relates to the field of measuring instruments and meters, in particular to a method and system for calibrating an electrical measuring instrument model. Background technique [0002] The existing electrical measuring instrument calibration usually adopts direct calibration technology, that is, the output signal of the standard source is measured by the instrument to be calibrated, and the instrument to be calibrated is calibrated by comparing the measured value of the instrument to be calibrated with the output value of the standard source; or the instrument to be calibrated and the standard instrument Simultaneously measure the same signal output by the excitation source, and calibrate the instrument to be calibrated by comparing the measured value of the instrument to be calibrated with the measured value of the standard instrument. The instrument whose measurement error is less than 1 / 3 of the instrument to be calibrated is called a sta...
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IPC IPC(8): G01R35/00
Inventor 李令冬徐席东叶昌健张永林王超王恺王玲
Owner ANHUI RESOURCE SAVING & ENVIRONMENTAL TECH CO LTD