电缆路径仪的探测技术和性能分析

Analysis of Detection Technology and Performance for Cable Tracer

为解决电缆线路急待标识的问题,介绍了电磁法测寻电缆路径的原理及技术方法。电磁法通过发射机施加某种频率交变的电流或磁场至被测电缆,使之产生电磁场,用接收机在地面上测量其强度及分布便可确定被测电缆的位置和埋深。对于不同的现场要求,分析了应用电磁法原理的电缆路径仪的几种定位方法(从发射机角度分为直连法、夹钳耦合法、磁感应法;从接收机角度分为极大值法、极小值法)及两种测深方法(直读法、45°测深法)的优缺点,并从技术性能方面提出了电缆路径仪的几点选型原则,可供使用单位参考。

To solve the problem that power cables urgently need to be marked, the electromagnetic principle and technological method for cable line location are introduced. The transmitter exerts alternating current or the alternating magnetic field with some kinds of frequency to the test cable, it causes the cable to produce the electromagnetic field, then the receiver measures this electromagnetic field intensity and its distribution on the ground, so it can determine the cable＇s position and the burying depth. To meet different field requirements for locating cables, the advantages and disadvantages of different location methods of the cable tracer which applying electromagnetic principle are analyzed （direct （conductive） connection, inductive coupling with the clamp, induction method （indirect method） in terms of the transmitter; the maximum value method, the minimum value method in terms of the receiver） and depth measurement methods （45°depth measurement, Direct depth measurement）. From technical performance aspect, the principle of cable tracer selection for users is proposed as reference.