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Temperature sensor self-testing device and method

A technology of temperature sensor and self-inspection device, which is applied in the direction of thermometer, measuring device, thermometer test/calibration, etc., which can solve the problems of inability to guarantee train safety, high-efficiency operation, and failure of temperature sensor self-inspection

Active Publication Date: 2019-01-11
ZHUZHOU CSR TIMES ELECTRIC CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of this, the object of the present invention is to provide a temperature sensor self-inspection device and method to solve the technical problem that the existing train system cannot perform rapid and effective self-inspection on the temperature sensor, and thus cannot guarantee the safe and efficient operation of the train

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  • Temperature sensor self-testing device and method
  • Temperature sensor self-testing device and method

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Embodiment 1

[0079] Through the analysis and research of a large amount of data, it is found that the temperature change of various relevant parts on the train is usually a relatively slow process. That is to say, it is less likely that the temperature will fluctuate greatly in a short period of time, and it is almost impossible for the temperature to drop sharply in a very short period of time. Therefore, based on this consideration, if it is found that the temperature change value fluctuates sharply in a short period of time, and there is a significant difference in the distribution of the change value in a similar period of time, it means that the corresponding temperature sensor (system) is likely to appear exception. Therefore, the specific embodiment of the present invention measures the fluctuation level by the standard deviation of the temperature difference value per unit time, and combines the K-S distribution test method to realize the test and comparison of the temperature diff...

Embodiment 2

[0107] In this embodiment, since the data used is mainly the time-series temperature data measured by the sensor, when performing real-time abnormal self-inspection, there are relative differences due to the different environments, lines and states of different trains, so it cannot be directly passed The temperature value is judged, so it is necessary to classify and reconstruct the temperature sequence data, establish a difference sequence and calculate the volatility in sections before performing anomaly detection. as attached figure 2 And attached image 3 As shown, an embodiment of a temperature sensor self-test method specifically includes the following steps:

[0108] S10) Carry out differential processing to the temperature data sequence T measured by the sensor under normal operation of the train to obtain the segmented standard deviation sequence Θ of the temperature difference sequence δT, and obtain the abnormal detection threshold K by statistically analyzing the...

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Abstract

The invention provides a temperature sensor self-testing device and method. The method comprises the following steps: performing differential processing on a temperature data sequence of a train undernormal conditions to obtain a segmented standard deviation sequence, and performing statistical analysis on the standard deviation sequence to obtain an abnormality detection threshold; performing differential processing on a real-time input temperature data sequence to obtain segmented standard deviation sequence; judging whether the segmented standard deviation sequence is abnormal based on thethreshold and the standard deviation sequence; if a certain segment of segmented standard deviation sequence is greater than or equal to the threshold, judging that the segment of temperature deviation sequence is abnormal, and entering the next step, otherwise, indicating that the sensor is normal; judging the distribution consistency between the abnormal certain segment of temperature deviationsequence, a normal reference sequence and the previous adjacent time period of temperature deviation sequence; if the consistency is present, judging that the sensor is normal, otherwise, judging that the sensor is abnormal. By adoption of the temperature sensor self-testing device and method provided by the invention, the technical problems that fast and effect self-testing cannot be performedon the temperature sensor in the prior art, and the safe and efficient running of the train cannot be guaranteed are solved.

Description

technical field [0001] The invention relates to the technical field of fault diagnosis, in particular to a self-checking device and method applied to train temperature sensors. Background technique [0002] The temperature sensor is one of the important components of various systems such as train transmission, control, and running department. It is responsible for the monitoring and sensing functions of the key temperature-related components of the whole train. It is the core device to ensure the safety and normal operation of the equipment. One of the key indicators to monitor. Usually, in most cases, those skilled in the art focus on the operation of the object monitored by the sensor, and seldom consider the internal relationship between the monitor and the temperature sensor (system) itself. In fact, as a device, the temperature sensor must have the possibility of failure. When the temperature value measured by the sensor is abnormal, it is often not completely sure wh...

Claims

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Application Information

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IPC IPC(8): G01K15/00
CPCG01K15/007
Inventor 刘邦繁张慧源李晨孙木兰褚金鹏刘昕武刘雨聪熊敏君
Owner ZHUZHOU CSR TIMES ELECTRIC CO LTD
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