示蹤線和普通電線有區別是示蹤電線一般顏色比較醒目，而普通電線則是一種鉛鋁色。可以說，相關管道上的示蹤線作用很大可測試下，下面就來簡單認識一下吧。

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.

管道示蹤線是專為查找與定位地下非金屬管線而設計的產品。它有效地了非金屬管線不能用金屬管線尋管儀探查的問題，可廣泛適用于燃氣、供水管線管線及排水管線等地下非金屬管網的查找與定位。

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.

示蹤線探測，管道敷設完成后，應使用管道探測器對已敷設之可探示蹤線進行可探性測試，以確保金屬絲已連接妥當，應記錄測試結果。

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.

將示蹤線的金屬線與管道定位儀的發射機輸入端連接，而發射機接地端應且盡可能遠離發射機，使用接地樁或者電線桿的接地，以減少接地電阻。用接收器去探測接受發射信號。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.

示蹤線的測試原理：

Test principle of tracer line:

銅包鋼是由鋼芯線和緊密包覆其外的銅層構成金屬芯，外側為PE防腐層，銅起到傳導弱電信號的作用，鋼絲則起到支撐作用。銅芯電線一般由內層的銅芯線、中間層的絕緣包皮和外層的保護外皮組成。

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.

銅包鋁由鋁芯線和緊密包覆其外的銅層構成金屬芯，外層為PE防腐層。由于鋼質燃氣管道外層的防腐層為具有絕緣、防腐性能的塑料層或涂層，與銅包鋼、銅芯電線、銅包鋁等外層也為具有絕緣、防腐性能的塑料層結構相似。

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，我們將兩者等效，通過采用PCM管道電流衰減率法，對示蹤線防腐層平均絕緣質量進行檢測。檢測原理是向管道示蹤線施加某一頻率的電流信號，電流由示蹤線向遠方傳遞時會逐漸衰減。其衰減大小與示蹤線的塑料層的絕緣電阻率有關，示蹤線塑料層的平均絕緣電阻率越高，電流衰減就越慢，反之則衰減越快。

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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