Wireless ultrasonic probe assembly for flaw detection of crawler-type steel rail and flaw detection method of wireless ultrasonic probe assembly

Abstract

The invention discloses a wireless ultrasonic probe assembly for flaw detection of a crawler-type steel rail and a flaw detection method of the wireless ultrasonic probe assembly. Each crawler plate in the wireless ultrasonic probe assembly comprises a plate base of the crawler plate, and an ultrasonic probe array, a battery, a pressure sensor, an ultrasonic wave transceiving circuit, a converter and a UWB (Ultra Wide-Band) communication module which are embedded in the plate base; the battery is connected with the ultrasonic wave transceiving circuit, the converter and the UWB communication module; the ultrasonic wave transceiving circuit, the UWB communication module and the pressure sensor are respectively connected with the converter; and the ultrasonic wave transceiving circuit is also connected with the ultrasonic probe array. According the flaw detection method, when ultrasonic waves meet nucleus flaw, horizontal cracks, longitudinal cracks and other damages inside the steel rail in the propagation direction, the damaged parts can generate reflection and scattering effects on the ultrasonic waves. According to the wireless ultrasonic probe assembly and the flaw detection method thereof, the relative rest between ultrasonic probes and the steel rail is realized by adopting a crawler rolling manner instead of the traditional wheel rolling manner, and thus the data sampling time is greatly prolonged; meanwhile, the detection flexibility can be improved and the detection cost is reduced.

Description

technical field [0001] The invention relates to ultrasonic non-destructive detection technology and wireless communication technology, in particular to an ultrasonic probe assembly for crawler rail flaw detection and a flaw detection method thereof. Background technique [0002] my country's railway transportation is busy, and the train running interval is only ten minutes. At the same time, the operating line is nearly 80,000 kilometers, the line condition is poor, and the number of overdue rails is large, resulting in a high incidence of rail damage. In order to ensure the safety of railway transportation, it is necessary to regularly inspect the lines and replace damaged rails. At present, the main equipment for detecting internal defects of rails is a small rail ultrasonic flaw detector, and the rail flaw detection is carried out manually. In order to prevent the occurrence and deterioration of damage, each line needs to be inspected more than ten times a year on averag...

AI Technical Summary

Problems solved by technology

[0009] Aiming at some deficiencies existing in the field of ultrasonic flaw detection of rails, such as difficult to increase flaw detection speed, high missed detection rate, high cost and complicated operation, the present invention aims to propose a wireless ultrasonic probe assembly for crawler rail flaw detection and its flaw detection method , UWB (Ultra Wide-Band, UWB) wireless communication method is used to directly transmit the continuous multi-frequency modulated ultrasonic signal sent by the background processing subsystem to the ultrasonic probe in the base of the track disc, and by measuring the continuous multi-frequency modulated ultrasonic signal Reflected wave signal to achieve non-destructive testing of rails

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