示踪线和普通电线有区别是示踪电线一般颜色比较醒目，而普通电线则是一种铅铝色。可以说，相关管道上的示踪线作用很大可测试下，下面就来简单认识一下吧。

The difference between the tracer wire and the ordinary wire is that the tracer wire is generally eye-catching, while the ordinary wire is a kind of lead aluminum color. It can be said that the tracer line on the relevant pipeline plays a great role. It can be tested. Let's have a brief understanding.

管道示踪线是专为查找与定位地下非金属管线而设计的产品。它有效地了非金属管线不能用金属管线寻管仪探查的问题，可广泛适用于燃气、供水管线管线及排水管线等地下非金属管网的查找与定位。

Pipeline tracing line is a product specially designed for finding and locating underground non-metallic pipelines. It effectively solves the problem that non-metallic pipelines can not be detected by metal pipeline finder, and can be widely used to find and locate underground non-metallic pipe networks such as gas, water supply pipeline and drainage pipeline.

示踪线探测，管道敷设完成后，应使用管道探测器对已敷设之可探示踪线进行可探性测试，以确保金属丝已连接妥当，应记录测试结果。

Tracing line detection: after the pipeline is laid, the pipeline detector shall be used to test the detectability of the laid traceable line to ensure that the metal wire has been properly connected, and the test results shall be recorded.

将示踪线的金属线与管道定位仪的发射机输入端连接，而发射机接地端应且尽可能远离发射机，使用接地桩或者电线杆的接地，以减少接地电阻。用接收器去探测接受发射信号。可以找到管道位移量和埋深。

Connect the metal wire of the tracer line to the transmitter input end of the pipe locator, and the transmitter ground end should be as far away from the transmitter as possible. Use the grounding pile or the grounding of the electric pole to reduce the grounding resistance. Use the receiver to detect and receive the transmitted signal. The displacement and buried depth of the pipeline can be found.

示踪线的测试原理：

Test principle of tracer line:

铜包钢是由钢芯线和紧密包覆其外的铜层构成金属芯，外侧为PE防腐层，铜起到传导弱电信号的作用，钢丝则起到支撑作用。铜芯电线一般由内层的铜芯线、中间层的绝缘包皮和外层的保护外皮组成。

Copper clad steel is a metal core composed of steel core wire and copper layer tightly wrapped around it. The outer side is PE anti-corrosion layer. Copper plays a role in transmitting weak current signals, while steel wire plays a supporting role. The copper core wire is generally composed of the inner copper core wire, the insulating sheath of the middle layer and the protective sheath of the outer layer.

铜包铝由铝芯线和紧密包覆其外的铜层构成金属芯，外层为PE防腐层。由于钢质燃气管道外层的防腐层为具有绝缘、防腐性能的塑料层或涂层，与铜包钢、铜芯电线、铜包铝等外层也为具有绝缘、防腐性能的塑料层结构相似。

Copper clad aluminum consists of an aluminum core wire and a copper layer tightly wrapped around it to form a metal core, and the outer layer is a PE anticorrosive layer. As the anti-corrosion coating on the outer layer of steel gas pipeline is a plastic layer or coating with insulation and anti-corrosion performance, its structure is similar to that of copper-clad steel, copper core wire, copper-clad aluminum and other outer layers with insulation and anti-corrosion performance.

因此，我们将两者等效，通过采用PCM管道电流衰减率法，对示踪线防腐层平均绝缘质量进行检测。检测原理是向管道示踪线施加某一频率的电流信号，电流由示踪线向远方传递时会逐渐衰减。其衰减大小与示踪线的塑料层的绝缘电阻率有关，示踪线塑料层的平均绝缘电阻率越高，电流衰减就越慢，反之则衰减越快。

Therefore, we equivalent the two methods and detect the average insulation quality of the anti-corrosion coating of the tracer line by using the PCM pipeline current decay rate method. The detection principle is to apply a certain frequency current signal to the pipeline tracing line, and the current will gradually decay when it is transmitted from the tracing line to the distance. The attenuation is related to the insulation resistivity of the plastic layer of the tracer line. The higher the average insulation resistivity of the plastic layer of the tracer line is, the slower the current attenuation is, and vice versa.

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