As a new type of intelligent stethoscope, the underground pipeline detector is used in census underground pipelines, consisting of transmitters, receivers, and accessories, mainly used for localization, depth measurement and long distance tracking, and pipe insulation fault points. Measure and search the Underground Pipeline detector as a new type of intelligent stethoscope for census, consisting of the underground pipe, consisting of transmitters, receivers, and accessories, mainly used for the positioning of underground pipes, depth measurement and long distance tracking, and pipeline insulation Measurement and search of the fault point. The equipment uses multi-coil electromagnetic technology, which greatly increases its ability to identify its precision and target pipeline, and can accurately track and locate target pipes even in a complex area in which the pipe is intensive. However, due to the complexity and diversity of the underground duct, a better method is to combine various technical methods.
The common site conditions in the operation of the underground line detector are as follows: 1. Start tracking from the joint or handover box. Before the cable is applied, the common joint on the cable is required to track the target pipe. If all cables are to be tracked from the handover box, the transmitter can work through the induction method, placed on one side of the handover box, and linear with the cable to track.
2, long distance tracking cable. In order to enable the transmitter signal to transmit enough distance, it is necessary to remove the ground connection of the cable. When the connector or linker is grounded due to safety or lightning protection, the disc can be used instead of the connector or the ground to protect the cable, and the uninterrupted positioning is possible.
3. It is a joint spike pulse. Most cable connections or connectors produce spike pulses, work experience and understanding of the local condition in the receiver response, which helps the operator to determine whether the spike pulse indicates a joint box. 4, is a metal guardrail.
The cable is usually directly buried under the road outside the road metal fence, and the signal is combined with a continuous metal guardrail. The metal guardrail is close to the antenna under the lower part of the receiver, it is difficult to track. Receive the receiver, make the lower internal antenna and metal guardrail, can overcome this difficulty.
5, street lighting. In general, the street light metal column is connected to a metal column with a metal string of the lighting cable, and the transmitter signal is connected to the street light metal column. If the cement lamp column - unless the lighting cable is connected to the maintenance rack, it is necessary to connect the transmitter signal to the metal shield of the lighting cable.
Understand the correlation and depth of the lighting cable (and other street facilities on the same lighting system), help track lighting cables, a connection point may apply signals to large-area cables. It is also possible to apply signals to other power cables using a street laminate, but the signal may be weak, because the signal may have been transmitted long distances before returning the substation, and can also flow out again from the system. At this time, the transmitter can improve the output power mode to improve the output power.
This method can be positioned to apply a signal or an inconvenient cable. For cables from wooden poles, cement poles, or illumination columns, the transmitter can be placed in induction mode, and signals to be applied to the ground with the ground at right angles on the wire rod. The above is the problem that the underground pipeline detector may meet when using it. Do you know? If there is any other need to understand, remember to pay attention to Xiaobian!
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