Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Accelerated life test method of electronic electric energy meter based on "life-stress" model

An accelerated life test, electronic technology, applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve problems such as improper setting of acceleration conditions, complicated situations, and loss of acceleration basis for accelerated life tests

Pending Publication Date: 2016-11-02
BEIHANG UNIV
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the former, the accelerated life test is undoubtedly very effective, because under accelerated conditions, the higher stress can expose the weak links of the product as soon as possible, thereby discovering the defects in the design and production links; while for the second use In other words, the situation is more complicated
Because it is difficult to establish the corresponding relationship between the accelerated conditions and the failure characteristics of the product under the use conditions, it is likely that the faults exposed under the accelerated conditions will not occur at all under the use conditions, or the improper setting of the accelerated conditions will lead to the introduction of new failure mechanisms , so that the accelerated life test loses the basis for acceleration
Moreover, no accelerated life model can accurately describe the life-stress relationship of a product, and each accelerated model is only applicable to a specific type of product. Therefore, selecting an appropriate accelerated model is the key to the success of the accelerated life test

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Accelerated life test method of electronic electric energy meter based on "life-stress" model
  • Accelerated life test method of electronic electric energy meter based on "life-stress" model
  • Accelerated life test method of electronic electric energy meter based on "life-stress" model

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0187] An accelerated life test is required for the existing type I electric meter. The test sample size is 30, and the number of test groups is 5 groups. The test results are shown in the following table after Weibull fitting:

[0188] Table 3 Accelerated life test results of a certain type of electric meter (Weibull fitting)

[0189] T(℃) RH(%) Beta Eta correlation coefficient acceptance threshold test result 85 95 1.05 2066 0.931 0.851 accept 85 85 1.07 2927 0.963 0.819 accept 85 75 1.05 4128 0.973 0.819 accept 75 95 1.02 4979 0.925 0.819 accept 65 95 1.03 13474 0.959 0.819 accept

[0190] The first column in Table 3 is the temperature stress value (unit: ℃), and the second column is the relative humidity stress value (unit: %). The third column and the fourth column are the shape parameter β and scale parameter η of the Weibull distribution respectively, and these two values ​​are obtained by p...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

An accelerated life test method for electronic energy meters based on the "life-stress" model, which has eight steps. Step 1: Define sample life characteristics; Step 2: Define failure criteria; Step 3: Accelerated life test of maximum stress combination; Step 4: Accelerated life test of other combinations, that is, conduct four different groups except the maximum stress combination Stress combination test; step five: failure data processing, that is, to fit the overall Weibull distribution model of the life of each group of test samples with the help of Weibull distribution fitting analysis method, and obtain the corresponding life characteristic parameters; step six: estimate acceleration Model parameters; Step 7: Determine temperature and humidity stress under service conditions; Step 8: Extrapolate sample failure distribution under service conditions. The invention can significantly shorten the time of the accelerated life test of the electronic electric energy meter and improve the accuracy of the test result. It has good practical value and broad application prospects in the field of accelerated life test technology.

Description

(1) Technical field: [0001] The invention relates to an accelerated life test method based on a "life-stress" model, in particular to an accelerated life test method for an electronic electric energy meter based on a "life-stress" model. It is an accelerated model based on Weibull life distribution model and Peck temperature and humidity model, and belongs to the technical field of accelerated life test. (two) background technology: [0002] With the implementation of the "one household, one meter" system for residents' electricity consumption and the development of the real estate industry, the demand for electric energy meters has grown surprisingly. In order to improve the power supply reliability of the power system, the power industry represented by the State Grid Corporation of China has put forward the development requirements of "intelligent and reliable electric energy meters", and has begun to promote and popularize the "intelligent and reliable" energy meters in B...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/00G01N17/00
Inventor 胡薇薇祁邦彦孙宇锋赵广燕丁潇雪郑鹏洲
Owner BEIHANG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com