摘要
储罐是石油、化工等领域的重要储存容器,底板腐蚀是储罐最为常见的安全隐患之一。储罐底板腐蚀类型多样,目前广泛应用的储罐底板漏磁检测系统难以识别出均匀壁厚减薄缺陷且难以进行精确厚度测量。为此,根据电磁超声具有测厚精度高、不需要耦合剂、非接触等优点,研制了一套储罐底板电磁超声测厚系统。该系统主要包括储罐底板扫查器、信号激励接收控制器、运动控制器和计算机分析处理系统。通过探头线圈和硬件电路优化设计,使得该系统具有无A/D采样、低频激励时回波信号分辨率高的特点。实验室内厚度7~20 mm的16MnR阶梯钢板上测试结果表明,该系统能够实现储罐底板扫查式高精度、高灵敏度测厚。
Storage tanks are important storage vessels in petroleum,chemical and other fields.Corrosion of the bottom plate of the storage tank is one of the most common safety hazards.There are various types of corrosion for the bottom plates of the storage tanks.The currently widely used scanning magnetic flux leakage detection system is difficult to identify defects in uniform wall thickness reduction and difficult to accurately measure the thickness.Therefore,with the advantages of electromagnetic acoustic transducers,such as high accuracy,no need of coupling agent,and non-contact,a set of electromagnetic acoustic thickness measurement system for the bottom plates of the storage tanks was designed and developed.The system mainly includes a tank floor scanner,a signal excitation receiving controller,a motion controller and a computer analysis and signal processing system.Through the optimization design of the probe coil and electronic circuit,the system has the characteristics of no A/D sampling and high resolution of echo signal under low-frequency excitation.Tests were carried out on 7~20 mm 16MnR stepped steel plate in the laboratory,and the results show that the system can realize the high-precision and high-sensitivity thickness measurement when scanning the bottom plate of the storage tank.
作者
张翱龙
吕驰
王俊杰
饶臻浩
李涛
武新军
ZHANG Aolong;LYU Chi;WANG Junjie;RAO Zhenhao;LI Tao;WU Xinjun(School of Mechanical Science and Engineering,Huazhong University of Science and Technology,Wuhan 430074,China;Equipment Research Institute,China Petroleum and Chemical Corporation Tianjin Branch,Tianjin 300271,China)
出处
《压力容器》
北大核心
2022年第4期75-82,共8页
Pressure Vessel Technology
基金
国家重点研发计划项目“储罐腐蚀电-磁-声复合在油检测模块开发”(2019YFB1310703)。
关键词
储罐底板
电磁超声
测厚
无A/D采样
tank floor
electromagnetic ultrasound
thickness measurement
no A/D sampling
