Design of damage detection system for mine-used wire rope
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摘要: 矿用钢丝绳在运行过程中会发生表面断丝翘起现象，可能导致运行中的钢丝绳把探伤仪孔壁划伤或带走的情况，甚至会对钢丝绳造成二次伤害，影响检测结果。针对该问题，基于超声波测距及强磁检测原理，设计了一种矿用钢丝绳损伤检测系统。该系统采用超声测距装置检测钢丝绳表面断丝翘起幅度，若检测值超过限定距离则发出报警，若检测值未超过限定距离，则由强磁检测装置进一步探测钢丝绳损伤情况。测试结果表明，针对设置的20,30,35 mm钢丝绳表面断丝翘起幅度，该系统的检测误差基本上不超过±2 mm，从而验证了该系统可有效、准确地检测钢丝绳表面断丝情况及断丝翘起幅度，避免了表面断丝翘起幅度过大对强磁检测装置等造成损伤。Abstract: The broken wire on surface of mine-used wire rope would tilt during operation, which may lead to the situation that the wire rope in operation scratches or takes away the inner wall of aperture in flaw detector, and even causes secondary damage to the wire rope, so as to affect detection results. For the above problems, a damage detection system for mine-used wire rope was designed based on ultrasonic ranging principle and strong magnetic detection principle. The system uses ultrasonic ranging device to detect tilting height of broken wire on the surface of wire rope. If the detection value exceeds the limit distance, an alarm would be issued, or else damage of the wire rope would be further detected by strong magnetic detection device. The test results show that in view of the set 20,30,35 mm tilting height of the broken wire, the detection errors of the system are basically not more than ±2 mm, which verify that the system can effectively and accurately detect broken wire on surface of the wire rope as well as its tilting height, so as to avoid the broken wire to damage the strong magnetic detection device caused by too high tilting.
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