Several detection methods of pipeline detector

2022/07/01

Author: Noyafa–CCTV Tester

Several detection methods of pipeline detector Pipeline detector is a new type of instrument used to detect the depth and damage of underground pipes, cables, etc., and it will not damage the surface during detection, which is very environmentally friendly. Today, the editor will show you several detection methods of a pipeline detector. The pipeline detector is a new type of instrument used to detect the depth and damage of underground pipes, cables, etc., and it will not be damaged during detection. The surface is very environmentally friendly. Today, the editor will take you to understand several commonly used detection methods of pipeline detectors.

1. Signal clamp method. During operation, apply the transmitter signal to the clamp, and then put the clamp on the measured metal pipeline or cable. The clamp is equivalent to the primary coil, and the circuit formed by the pipeline and the ground is equivalent to the secondary coil.

When the alternating current output by the transmitter flows in the primary winding and the annular magnetic field passes through the pipeline loop, an induced secondary current is generated in the pipeline. 2. Dynamic source emission method. The moving source emission method is to place the receiver above the proven target pipeline or above the dew point of the pipeline, move the transmitter at an appropriate distance (perpendicular to the pipeline, and observe the signal changes of the receiver. When the signal is the strongest, the transmitter The position of is the position of the target pipeline on the ground projection point.

3. Offset induction method. Offset induction is to inductively excite the target pipeline in the section with sparse pipeline to reduce the influence of the side pipeline, so as to highlight the effective signal of the pipeline under test in the section with high pipeline density, to achieve high signal-to-noise ratio, For the purpose of high-resolution detection, they have certain requirements on the launch position. The above editors have introduced several detection methods in the induction detection method, as well as a variety of detection methods such as direct wiring method, current intensity and direction measurement method, and different judgments should be made according to different environments.

If necessary, please contact Shenzhen Noyafa Electronic Technology Co., Ltd.! .

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