Noyafa Cable Tester
Surface water pipe refers to water supply, drainage (rain, sewage), gas, electricity, communication, thermal, industrial pipeline. It is an important part of urban infrastructure, which is the basic basis for urban planning, construction and management. Underground pipeline detector is a commonly used surface water pipe refers to water supply, drainage (rain, sewage), gas, electricity, communication, thermal, industrial pipeline.
It is an important part of urban infrastructure, which is the basic basis for urban planning, construction and management. Underground line detectors are commonly used line detection equipment, often applied to various pipeline detection projects. At present, the most convenient, effective, commonly used in the detection of underground pipelines is an electromagnetic method based on electromagnetic induction.
The receiver measures the change in the secondary field generated under the action of the transmitting airport on the ground to determine the spatial position of the underground line. It is generally believed that the secondary field excited by a straight line can be seen as an electromagnetic field generated by unlimited long straight lines. The receiving device is based on such electromagnetic field changes to determine the depth.
The experimental results show that the measurement results are very accurate without other pipeline field interference. For accurate, fast and efficient pipeline detection, different detection methods should be selected according to the characteristics of the ground pipeline. The detection method of the pipe detector can be divided into the following categories: First, induction detection method.
The incentive line condition in the transmitter in different placed states. The ground pipe detector is the principle of electromagnetic induction, detecting the precise direction and depth of the underground metal pipe and cable, and finds the fault point outside the pipeline, the underground pipe detector has the intelligent, graphical operation indication and audio modulation indication function of all Chinese characters. It is the most convenient underground pipe detector today. The transmitter has an ohm table that automatically measures the loop resistance and automatically outputs impedance matching to ensure optimal output signals.
This instrument can use a coupling according to the actual application, and in the case of constant electricity, it is used to find a passage of the charged cable for testing. With the 50Hz detection function of the receiver, track the 50Hz power frequency signal emitted by the cable, which is really used, with the best performance cost. Its basic working principle is: the transmitter generates electromagnetic waves, and transmits the transmitted signal to the metal line detected underground by different transmit connections. When the upper metal line is induced, the induction current, induction current edge is generated on its surface. The metal pipeline is spread to the distance. During the current propagation process, the electromagnetic wave is radiated from the ground metal line, and therefore, when the local line detector is detected on the ground, the underground metal line is received directly above the ground, and the electromagnetic wave signal is received. The position and direction of the underground metal line can be judged by the strength of the signal.
Depending on the principle of detection, the underground line detector is divided into two categories. One is to use electromagnetic induction principles to detect metal lines, electric / optical cables and some non-metal pipelines, wherein the non-metal pipeline has a metal marking line; the other is to utilize electromagnetic waves Exploring the underground pipeline of various materials, you can also detect underground, commonly known as radar, also called pipe radar. Underground line detectors are generally consisting of two major components of the transmitting end and the receiving end. Transmitter: A signal current is applied on the measured line, which generally uses a direct connection method, induction method, and clamp three incentives.
Acceptor: There is an induction coil in the receptacle, a pipeline magnetic field signal, and a coil generating an induction current, and the direction of the pipeline is calculated. About Underground Pipeline Detectors, I will introduce you to you, pay attention to Xiaobian, more exciting, continue in the next period! .
