Train axle temperature sensor fault detection method and apparatus

Abstract

The invention discloses a train axle temperature sensor fault detection method and an apparatus. The method comprises the following steps that in a normal operating condition of an axle temperature sensor, training data of the axle temperature sensor is acquired; pretreatment is performed on the training data so that time of the training data is synchronous and the training data is low-noise and smooth and steady; according to the training data, a principal component analysis method is used to establish a principal component model and generate a square prediction error control limit; real-time monitoring is performed and measurement data of the axle temperature sensor is acquired; pretreatment is performed on the measurement data; according to the measurement data, the principal component analysis method is used to generate square prediction error statistics; whether the square prediction error statistics is less than or equal to the square prediction error control limit is determined; if the square prediction error statistics is less than or equal to the square prediction error control limit, the axle temperature sensor works normally; if the square prediction error statistics is greater than the square prediction error control limit, the axle temperature sensor has a fault and fault alarm is performed. By using the method and the apparatus of the invention, a data state of the sensor is detected in real time; a hidden trouble is found out timely and the fault sensor is detected so that axle temperature data collected in a normal state is guaranteed to be reliable.

Description

technical field [0001] The invention relates to the technical field of train detection equipment, in particular to a fault detection method and device for a train axle temperature sensor. Background technique [0002] In 1804, the first steam locomotive with a speed of 5 to 6 kilometers per hour appeared in the world. 200 years later, the speed of trains is moving towards higher and higher standards. Today, a higher speed train with a speed of 605 kilometers per hour has been broken through by CSR Qingdao Sifang Test. The increasing speed of trains has also caused widespread concern about train safety. The safety of the train is closely related to the quality of the axle temperature sensor on the train, and the failure of the axle temperature sensor is one of the more prominent reasons for all the delays. The existing railway axle temperature detection system mainly uses a high-precision temperature axle temperature sensor positioned and installed on the bearing seat to rea...

AI Technical Summary

Problems solved by technology

With the long-term operation of the train, the axle temperature sensor will have fixed deviation, drift, gradual change or permanent failure faults, and there is a lack of detection methods for the performance of the axle temperature sensor itself in specific applications

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