A kind of abnormal value detection method of heat meter durability test process

Abstract

The invention relates to a method for detecting an abnormal value during a durability test process of a calorimeter. Durability test process state parameters for a calorimeter are collected at an interval of a sampling period tS and a test process state parameter data set is established; state parameter feature extraction is carried out; flow states of a system are determined; according to the flow states, feature parameter models of all flow states are established; and on the basis of the extracted feature values of all state parameters, abnormity determination is carried out by combining the established feature parameter models of all flow states, thereby realizing detection of the abnormal value of the durability test process of the calorimeter. According to the method provided by the invention, real-time one-line detection of abnormal values of the test process can be realized; the monitoring capability of the test process is improved effectively; the refined detection level for the abnormal fault point increases; the detection process is controlled automatically; the manpower cost is saved; the operation becomes convenient; the reliability is high; the service life is long; and the security and detection result reliability are high.

Description

technical field [0001] The invention belongs to the technical field of instrument testing, and in particular relates to a method for detecting abnormal values ​​in a heat meter durability test process. 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 based on the European standard EN 1434-4:2007 "Heat Meter Chapter Four: Type Approval Tes...

AI Technical Summary

Problems solved by technology

The existing durability test devices are also some simple test devices, which cannot fully meet the requirements based on the European standard EN 1434-4:2007 "Heat Meter Chapter 4: Type Approval Test" and the national test method for heat meter durability

[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.

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