测控技术2024，Vol.43Issue(7)：1-8,8.DOI:10.19708/j.ckjs.2023.05.224
交流电磁场钢轨表面裂纹高速检测信号处理模块开发
Development of Signal Processing Module for High-Speed Detection of Alternating Current Field Rail Surface Cracks
摘要
Abstract
Alternating current field measurement(ACFM)technology has a good application prospect in rail crack detection due to small influence from speed and lifting effect.However,the signal picking speed can cause the crack signal frequency to shift,resulting in quantization error,missed detection and false detection.In order to improve the reliability of ACFM technology in rail crack detection,signal processing module for high-speed detection of alternating current field rail surface crack is developed based on field pragrammable gate ar-ray(FPGA).The influence of detection speed on frequency shift of crack signal is studied by theoretical deriva-tion method,and the relationship between detection speed and effective frequency range of crack signal is built.A digital orthogonal lock-phase amplifier with cut-off frequency automatic tracking detection speed is de-veloped using FPGA.At the same time,a complete rail surface crack detection device and experimental system are developed.Finally,the detection ability and stability of the module are verified by experiments.关键词
钢轨表面裂纹/高速检测/交流电磁场检测/速度效应/自动跟踪Key words
rail surface cracks/high-speed detection/ACFM/speed effect/automatic tracking分类
机械制造引用本文复制引用
陈炫昂,葛玖浩,胡宝旺..交流电磁场钢轨表面裂纹高速检测信号处理模块开发[J].测控技术,2024,43(7):1-8,8.基金项目
国家自然科学基金青年基金资助项目(61903191) （61903191）
中央高校基本科研业务费(NS2022038) （NS2022038）
南京航空航天大学研究生创新计划(xcxjh20220343) （xcxjh20220343）
