埋地塑料管道在管道內無金屬、無液體的情況下，具有不導電不導磁基本絕緣的特性，金屬探測等方法難以識別，那么怎么就能識別呢？探測埋地塑料地埋示蹤線起了大作用！

When there is no metal or liquid in the pipeline, the buried plastic pipeline has the characteristics of non-conductive and non-magnetic basic insulation, which is difficult to identify by metal detection and other methods, so how can it be identified? Detecting the tracer line of buried plastic pipeline plays a big role!

在實際應用中，管材需要更換、修補或者管道改建施工時如無法通過金屬探測定位（例：無金屬示蹤系統的埋地PE燃氣管、埋地PE給、排水管等），還可以采用以下方法定位埋地塑料管道，應該查找出對應工程的施工圖紙，大致確定埋地管道位置、走向、深度。然后采用聲波定位法確定管道位置。對于遺失施工圖紙或者施工圖紙標準不清晰的，可以直接通過聲波定位法確定管道位置。

In practical application, if pipes need to be replaced, repaired or reconstructed, if it is impossible to locate through metal detection (e.g. buried PE gas pipes without metal tracking system, buried PE water supply and drainage pipes, etc.), the following methods can also be used to locate buried plastic pipelines. The construction drawings of corresponding projects should be found to roughly determine the location, direction and depth of buried pipelines. Then the acoustic positioning method is used to determine the position of the pipeline. If the construction drawings are missing or the standards of the construction drawings are not clear, the pipeline position can be directly determined by acoustic positioning method.

該方法使用聲波定位設備，基于聲學探測原理，分發射和接收兩部分組成。音頻驅動器通過轉換接頭連接到管道系統檢測井內裸露的管件、管材上，向其施加特定組合頻率的聲波信號，聲波信號帶動管道共振并向遠端傳播，傳播過程一部分聲波能量可以到達地地面，我們再通過手持接收裝置沿路面接收對應的聲波信號，通過耳機內反饋的聲波信號強度及數字顯示的聲波大小組合判斷，從而快速定位出埋地塑料管道位置；效率高及準確率較好。

This method uses acoustic positioning equipment, which is based on the principle of acoustic detection and consists of two parts: transmitting and receiving. The audio driver is connected to the exposed pipe fittings and pipes in the detection well of the pipeline system through the adapter, and the acoustic signal with a specific combined frequency is applied to it. The acoustic signal drives the pipeline to resonate and propagate to the far end. Part of the acoustic energy can reach the ground during the propagation process, and then we receive the corresponding acoustic signal along the road through the handheld receiving device, Through the combination judgment of the acoustic signal strength fed back from the earphone and the acoustic wave size displayed digitally, the position of the buried plastic pipeline can be quickly located; High efficiency and good accuracy.

廠家認為對于管道內無金屬、無液體的埋地塑料管道，簡捷便利的示蹤方法仍然是敷設時安裝金屬示蹤線系統。聲波定位法增大人工與設備開銷，不利于維修與更換，所以金屬示蹤系統的埋地PE燃氣管、埋地PE給、排水管還是比較常用的方法了。

The manufacturer believes that for buried plastic pipelines without metal and liquid in the pipeline, the simple and convenient tracing method is still to install the metal tracing line system when laying. Acoustic positioning method increases the cost of labor and equipment, which is not conducive to maintenance and replacement, so the buried PE gas pipe, buried PE water supply and drainage pipe of metal tracking system are still commonly used.

此外要注意，檢測信號能加載到示蹤線上，中間故障太多，泄漏嚴重，中間沒有檢測井。安裝了地埋示蹤線，始端末端剪斷懸空，與大地不接觸，中間閥井內示蹤線未作固定處理。示蹤線線徑太小，不能滿足檢測信號傳輸要求，容易被施工挖斷或自然應力破壞。

In addition, it should be noted that the detection signal can be loaded onto the tracer line, there are too many intermediate faults, serious leakage, and there is no detection well in the middle. The buried tracer line is installed, and the beginning and end are cut and suspended in the air, which is not in contact with the earth. The tracer line in the middle valve well is not fixed. The diameter of the tracer line is too small to meet the requirements of detection signal transmission, and it is easy to be cut off by construction or damaged by natural stress.

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