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A method for detecting abnormal points in heat meter durability cold and heat shock test

A technology of durability test and thermal shock, applied in the field of instrument anomaly detection, it can solve the problems of long durability test process, economic loss, and large flow cycle change span.

Active Publication Date: 2017-12-05
陕西省计量科学研究院
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Problems solved by technology

The existing durability test devices are also some simple test devices, which cannot fully meet the requirements of the durability test method for heat meters based on the European standard EN 1434-4:2007 "Heat Meter Chapter 4: Type Approval Test" and national standards
[0003] Furthermore, the durability test process takes a long time, the flow cycle changes in a large span, and an abnormal fault may lead to the failure of the entire durability test, resulting in huge economic losses and potential safety hazards for personnel. However, research in this area has rarely been explored at home and abroad.

Method used

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  • A method for detecting abnormal points in heat meter durability cold and heat shock test
  • A method for detecting abnormal points in heat meter durability cold and heat shock test
  • A method for detecting abnormal points in heat meter durability cold and heat shock test

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test approach 3

[0125] Among them: f(μ, σ, max, min, Med, Desc, Asc) is the abnormal point detection function, 1 means normal, 0 means abnormal, E 3 For test method 3, that is, the set of all characteristic parameters under 4000 thermal shock tests, X 3 is the current feature parameter set under test method 3;

[0126] E3=(O GYmax ∩O GYmin )∩(O SWmax ∩O SWmin )∩(O CLSmax ∩O CLSmin ∩O LELS1 ∩O LELS2 )

[0127] ∩(O LJ )∩((O GLGWG ∩O GLGWD ∩O GLGWC )∪(O GLDWG ∩O GLDWD ∩O GLDWC ))

[0128]If the detection data result is abnormal, all the eigenvalues ​​of the abnormal points are obtained, and all the eigenvalues ​​of the abnormal points are added to the abnormal data set. The abnormal data set records the process state parameters using different feature extraction methods under different working conditions. The collection of detected outliers, according to whether the outliers appear continuously in the continuous sampling period, the outliers can be divided into two cases: the ou...

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Abstract

The present invention relates to a calorimeter durability cold and hot impact test abnormity point detection method. A sampling period ts is taken as an interval to collect the calorimeter durability test process state parameters, a test process state parameter data set is established, the state parameter features are extracted, the state feature parameter model of 4000-times cold and hot impact tests is established, and the abnormality determination is performed through combination of the feature parameter model of each temperature state according to the extracted feature value of each state parameter to complete the abnormality point detection. The calorimeter durability cold and hot impact test abnormity point detection method can perform real-time online detection of the calorimeter durability cold and hot impact test process monitoring fault abnormality points to effectively improve the whole-process monitoring capacity of the test process and improve the fine detection level of the fault abnormality points, and the detection process is automatically controlled, the human cost is saved, the operation is convenient, the reliability is high, the service life is long, the safety is good, and the detection result reliability is high.

Description

technical field [0001] The invention belongs to the technical field of instrument abnormality detection, and in particular relates to a method for detecting abnormal points in a heat meter durability cold and heat shock test. Background technique [0002] In our country, it has been more than ten years since the actual use of heat meters for household measurement has been piloted, and the number of installed and used heat meters has become very large. Judging from the daily testing statistics, the problems in the quality of heat meter products are mainly manifested in the long-term reliability. Research on the durability of heat meters is limited to theoretical aspects and learning understanding. The specific test is mainly limited to the 300h test, and the accumulated data is not very sufficient. The existing durability test devices are also some simple test devices, which cannot fully meet the requirements of the durability test method for heat meters based on the Europe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01K19/00
CPCG01K19/00
Inventor 周秉直李锋李博李宁张俊亮韩婉婷宗世敏马军
Owner 陕西省计量科学研究院
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