Electric energy meter life evaluation method based on accelerated degradation test

Abstract

The invention relates to an electric energy meter life evaluation method based on accelerated degradation test. The method comprises the following steps: 1, acquiring electric energy meter accelerateddegradation test data, and estimating the distributed parameter values of a degradation path model of the electric energy meter degradation characteristic quantity under different stress levels; 2, selecting an accelerated degradation model according to the type of acceleration stress, and calculating the false life values of the electric energy meter under different stress levels according to the failure thresholds of the degradation characteristic quantity in the test; 3, calculating acceleration factors corresponding to different stress levels according to the accelerated degradation model, and converting false life values of acceleration factors under different stress levels to the normal work stress level; 4, selecting the life distribution type of an electric energy meter, and estimating the unknown parameter values in a life distribution function; and 5, estimating by utilizing the life distribution function to obtain the life of the electric energy meter under a normal work stress level. Compared with the prior art, the method has the advantages that the life condition of the electric energy meter can be accurately estimated, and more conforms to engineering practice.

Description

technical field [0001] The invention relates to the technical field of measurement equipment operation verification and detection, in particular to a method for evaluating the life of an electric energy meter based on an accelerated degradation test. Background technique [0002] Through the reliability analysis and life evaluation of the smart energy meter, the manufacturer of the energy meter can discover the weak link of the product design or the quality defect of the components in advance, and make targeted improvements, thereby improving the quality of the smart energy meter as a whole. Ensure the long-term reliable and stable operation of the smart energy meter on site. [0003] Using traditional reliability evaluation methods to evaluate the reliability of smart energy meters requires a lot of time and labor costs. Therefore, the accelerated life test method is widely used to evaluate the reliability of smart energy meters. The accelerated life test only records the ...

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Problems solved by technology

If no sample fails in the test, or the number of failed samples is very small, then the test time can only be extended, otherwise the obtained failure time data cannot be used to evaluate the reliability of the product, or the obtained evaluation results are different from the actual situation. there is a big gap

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