基于漏磁检测技术的管内爬机

介绍了漏磁检测技术的基本原理、总体设计方案和系统构成，提出了漏磁信号智能化处理的流程，探讨了管道缺陷与管道特征的甄别方法。由于缺陷漏磁信号受到管道诸多因素的影响，必须找到这些影响因素的规律并加以补偿，经过补偿后的信号为管道漏磁检测结果的准确性、一致性以及客观性奠定了坚实的基础。该设备以气缸为动力源，靠气缸伸缩产生蠕动前进，通过励磁、漏磁信号采集、消磁等环节来达到管内行走检测的目的。由于采用钢刷支撑结构，因而又具有扫线功能，可将管道内的砂石杂物推出。它具有检测距离远，定位准确可靠，设备结构简单易维护等特点，在无损检测领域具有重要的意义和广阔的应用前景。

In-pipe Creeper Based on the Technology of Magnetic Flux Leakage

This paper introduced the basic theory of magnetic flux leakage inspection, the overall program design and system structure. It also proposed the flow of intelligent progress of flux leakage signal. Identification of the pipeline defects and pipeline characteristic is discussed. As the magnetic leakage defect is impact by many factors, rules of these impact factors must be found. Signal after compensation lays a solid foundation for the accuracy, consistency, and objectivity of the pipeline flux leakage inspection signal. The source power of this equipment is a cylinder ; the equipment is churned by the cylinder＇ s compression, through the excitation, magnetic flux leakage signal acquisition, such as degaussing tube segments to achieve the purpose of a walk-in-the-pipe test. A scavenger function is realized because of the steel brush braced structure, and it can clean the sandstone and sundries in the pipeline. This equipment has such characteristic as long distance inspection, positional accuracy and reliability, easy structure, and easy maintenance. This equipment is important for its broad application prospect in the field of nondestructive examination.