A PHM system for subway train fault detection

By combining static and dynamic PHM fault diagnosis modules and using photoelectric sensors to detect the lubricating oil status of the gearbox, multiple problems in the fault detection of subway train gearboxes have been solved, enabling accurate fault diagnosis and unified management.

CN116658596BActive Publication Date: 2026-05-05QINGDAO YUNKAI TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202310683148.9
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-06-09
Publication Date
2026-05-05
Estimated Expiration
2043-06-09

AI Technical Summary

Technical Problem

Existing technologies cannot fully detect lubricating oil emulsification faults, gearbox oil leakage faults, and gear tooth breakage faults in subway train gearboxes, and lack unified management and remote transmission capabilities for fault information.

Method used

Combining static and dynamic PHM fault diagnosis modules, the system uses photoelectric detection units and composite sensors to collect vibration, impact signals, and lubricating oil status of the gearbox in real time. Photoelectric sensors are used to detect the color and level of the lubricating oil, enabling accurate fault diagnosis and early warning.

Benefits of technology

It improves the accuracy and stability of subway train fault detection, enables timely early warning of lubricating oil emulsification, gear tooth breakage and oil leakage, and enhances the unified management and remote transmission capabilities of fault information.

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Abstract

This application discloses a PHM (Prognostics and Health Management) system for subway train fault detection, relating to the field of subway train fault detection technology. It includes an onboard host and gearbox, a dynamic PHM fault diagnosis module, and a static PHM fault diagnosis module. The gearbox contains a gear set. The technical advantages of this application are: by combining the static and dynamic PHM fault diagnosis modules, when the subway train is noisy, the dynamic PHM fault diagnosis module performs gearbox fault detection on the lubricating oil; when the subway train is stationary, the static PHM fault diagnosis module performs a secondary judgment on the previously occurred fault warnings; a liquid level photoelectric sensor provides an upper limit warning for the oil level during oil filling, and through modification, it can also detect major gearbox oil leakage faults; when the train is stationary, a color sensor detects whether the lubricating oil has emulsified; and when the train is moving, a color sensor can also preliminarily detect whether a gear tooth breakage fault has occurred.
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