管道腐蚀超声波在线检测技术  

On-line ultrasonic detecting technology for pipe-line corrosion

作　　者：杨理践[1] 王健[1] 高松巍[1] 

机构地区：[1]沈阳工业大学信息科学与工程学院,辽宁沈阳110870

出　　处：《中国测试》2014年第1期88-92,共5页China Measurement & Test

基　　金：国家自然科学基金项目(60927004;61141004);十二五国家科技部支撑计划项目(2011BAK06B01-03)

摘　　要：提出一种用于管道在线腐蚀检测的方法,基于超声波脉冲反射法检测原理,依据超声波在介质中的传播特性,研究系统的超声波发射电路和程控放大电路。实验结果表明:发射电路产生的高压负脉冲信号能够有效激励超声探头;程控放大电路可以解决回波信号因深度增加能量衰减的问题,获得的信号达到技术要求。系统能够完成管道在线腐蚀检测的需要,具有良好的应用价值。This paper puts forward an online method for detecting pipeline corrosion. On the basis of the detection principle of ultrasonic pulse reflection method and the ultrasonic propagation characteristics of the medium, the paper investigated the ultrasonic transmitting circuit, programmable amplifying circuit and data acquisition circuit of the system. The experimental results show that the ultrasonic probe can be effectively excited by the pulse waveform signal generated by the transmitting circuit, and programmable amplification circuit solved the problem of echo signal energy attenuation due to the depth increased. The obtained signal met technical requirements. The system fulfills the needs of the pipe-line corrosion monitoring, and has a good application value.

关 键 词：腐蚀检测 超声测厚 高压负脉冲 可变增益放大 增益控制 

分 类 号：TG115.285[金属学及工艺—物理冶金] TG111[金属学及工艺—金属学]