NOYAFA Electronic specializing in testing instruments and cable testers for 16 years
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NOYAFA Electronic specializing in testing instruments and cable testers for 16 years
Author: Noyafa–POE checker
With the acceleration of urbanization in my country, in order to ensure the effective operation of the city, it is necessary to effectively manage the urban underground pipelines, which requires the support of the corresponding underground pipeline detection technology. The pipeline detector is the most effective way to detect various underground pipelines. With the acceleration of urbanization in my country, in order to ensure the effective operation of the city, it is necessary to effectively manage the underground pipelines in the city, which requires the corresponding underground pipeline detection technology. support. Pipeline detectors are the most effective detectors for detecting various underground pipes, such as gas, electricity, telecommunications, tap water, drainage and cable television.
Below I will introduce it to you in detail. The direct current detection method is used to carry out geophysical exploration. Specifically, in the process of detection, two power supply electrodes are mainly used for corresponding direct current power supply, and a power supply cycle is formed underground, through the circulating power supply To ensure the measurement of the underground current density, and then can effectively determine the specific location of the buried metal pipeline. Under normal circumstances, the detection using this method is mainly based on the corresponding metal pipelines. This method is based on the difference in current density. The density resistivity method was used for the corresponding determination.
For example, in the measurement process of underground pipelines in a certain city, the direct current detection method was used for geophysical detection, which effectively found the location of the metal pipelines in the concrete material; the alternating current detection method was used for geophysical detection, specifically In other words, in the process of detection, the main use of alternating current is in the process of magnetic field transformation, resulting in the corresponding electrical conductivity and the corresponding magnetic transformation, in the process of using the pipeline detector, through the alternating current The formed magnetic field is used to detect the corresponding underground pipeline, thereby effectively ensuring the accuracy of the underground pipeline detection. By using the alternating current detection method to carry out geophysical detection, the differences between the underground media can be effectively found, and through the analysis of these differences, the specific problems and sources that cause these differences can be found out. Specifically, these methods have the characteristics of uniform measurement and long working time, and are one of the effective methods for underground pipeline detection.
Underground pipeline detector step voltage method test: The step voltage method is the most effective method in our practical application. The detection principle is: a high-voltage current is provided by the transmitter, and the current enters the ground through the cable fault point and generates around the fault point. a step voltage, through“A”The two electrodes of the frame measure the change in potential along the cable path. When approaching the fault point, the potential difference will increase rapidly and reach a maximum value before and after the fault point is approached. In the event of multi-point faults, multiple points can be detected along the cable path“Polarity change point”, and then find the multi-point geoelectric mutation“zero”Potential point.
The above is some related introductions about the use of pipeline detectors by Xiaobian, I hope it can be helpful to all friends.
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