Train bearing defect detection method and device

Abstract

The invention provides a train bearing defect detection method and a device. The train bearing defect detection method is applied to train bearing defect detection device. The train bearing defect detection device comprises two acoustic sensor arrays and at least two wheel sensors. The method comprises the steps of collecting and storing sound signals received by each microphone sensor arranged in the two acoustic sensor arrays and the induction signals of the at least two wheel sensors when a train goes by the train bearing defect detection device; according to the induction signals, calculating to obtain the location of a train bearing at each of different moments within a signal acquisition area; according to the locations of the train bearing at different moments within the signal acquisition area, conducting the time-delay superposition treatment on the sound signals received by each microphone sensor in the two acoustic sensor arrays respectively to obtain two sets of sound signals. According to the technical scheme of the invention, the signal-to-noise ratio of detected sound signals is improved. Meanwhile, the detection effect is more ideal.

Description

[0001] This application claims the priority of the Chinese patent application submitted to the China Patent Office on April 7, 2016, with the application number 201610211527.8, and the title of the invention is "A Array Acoustic Detection Method for Online Monitoring of Train Bearing Defects", the entire content of which Incorporated in this application by reference. technical field [0002] The invention relates to the technical field of on-line monitoring of train bearings, in particular to a method and device for detecting defects of train bearings. Background technique [0003] As railway transportation becomes more and more frequent and the mileage of trains continues to increase, the safety inspection of trains has become more and more important. Train bearings are one of the parts with the worst working conditions in train components. In the case of continuous high-speed and long-distance train operation, the train bearings bear large dynamic loads. Once a bearing fai...

AI Technical Summary

Problems solved by technology

The traditional vibration detection technology is contact diagnosis. It is necessary to install a vibration detection device on the train to detect the vibration of the train bearing. The equipment installation of this detection method is complicated and the failure rate is high.

[0005] In response to the shortcomings of vibration detection technology, researchers at home and abroad have proposed a single-channel sound diagnosis technology to determine whether there are defects in train bearings through the detection of bearing sound, which overcomes the shortcomings of traditional vibration detection technology, such as complicated installation and high failure rate

However, the existing single-channel sound diagnostic technology is easily disturbed by noise, and the signal-to-noise ratio is low, so it is difficult to obtain ideal detection results.

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