变造机动车车架超声波检测方法的研究与应用OA
Research and Application of Ultrasonic Detection Method for Tampered VIN Areas on Vehicle Frames
在涉机动车案件中,犯罪分子常通过修改车架的VIN码(车辆识别码)来使涉案车辆重新获得合法身份.然而,当前缺乏快速且精确鉴定VIN码区域是否被篡改的技术手段.本文研究了利用超声波方法识别VIN码篡改行为,通过采用合适的探头和耦合剂,结合小波变换降噪技术,探索了准确可靠的判定阈值,提出了一种无损检测方法,能够快速、准确检测出车架VIN码区域是否通过隐藏焊缝的方式进行了"替换"篡改,同时还能准确判别出焊缝缺陷的大小以及位置.这种便携式的无损检测技术,为快速查缉嫌疑盗抢车辆提供了有力支持,有效提升了打击犯罪分子的效率.
In motor vehicle-related cases,criminals often modify the VIN(Vehicle Identification Number)of the vehicle frame to make the involved vehicles regain legal status.However,currently,there is a lack of technical means that can quickly and accurately identify whether the VIN code area has been tampered.This paper studies the use of ultrasonic methods to detect VIN code tampering.By employing appropriate probes and coupling agents,combined with wavelet transform noise reduction technology,reliable determination thresholds were explored and a non-destructive testing method was proposed.This method can quickly and accurately detect whether the VIN area of the vehicle frame has been tampered with by"replacement"through hidden welds,and can also precisely identify the size and location of weld defects.This portable non-destructive testing technology provides strong support for quickly investigating suspected stolen vehicles and effectively improves the efficiency of combating criminals.
闫寒梅;韩志毅;王怡;赵辛;文涓
山西警察学院,太原 030401太原市公安局,太原 030027山西警察学院,太原 030401太原市公安局,太原 030027山西省公安厅科技处,太原 030031
社会科学
变造机动车VIN码超声波检测隐藏焊缝探测小波变换
the altered motor vehicle VIN codeultrasonic testinghidden weld detectionwavelet transform
《刑事技术》 2026 (2)
175-180,6
公安部应用创新计划(2017YYCXSXST018)
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