Electrified cable detection method, device and system
A detection method, electric cable technology, applied in the direction of the fault location, etc., can solve problems such as failure, cable extrusion, errors, etc., and achieve the effect of saving labor costs
Inactive Publication Date: 2013-06-05
中国移动通信集团宁夏有限公司
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Problems solved by technology
This method consumes a lot of time and manpower for the layout, especially in the wiring trough of a large communication room, the cable extrusion is very serious, and the manual layout will not be possible, and sometimes errors may even occur due to the crossing of cables
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[0025] The present invention will be described in detail below in conjunction with the accompanying drawings.
[0026] method embodiment
[0027] figure 1 It is a flow chart of an embodiment of the live cable detection method of the present invention. Such as figure 1 As shown, this embodiment includes:
[0028] Step 102, detecting the existing harmonic component at the upper end of the energized cable, in this embodiment, detecting the third harmonic component V1 at the upper end of the energized cable;
[0029] Step 104, generating an excitation signal according to the collected harmonic signal of the current in the energized cable;
[0030] Step 106, converting the excitation signal into an induced voltage V2;
[0031] Step 108, load the induced voltage V2 on the upper end of the energized cable;
[0032] Step 110, detecting the harmonic component of the energized cable at the lower end of the energized cable, in this embodiment, detecting the third harmonic compone...
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The invention discloses an electrified cable detection method, an electrified cable detection device and an electrified cable detection system. The electrified cable detection method comprises the following steps of: A, detecting the existing harmonic voltage of the electrified cable at the upper end of the electrified cable; B, generating excitation signals according to the acquired harmonic signals of the current in the electrified cable; C, converting the excitation signals into an induction voltage and loading the induction voltage at the upper en of the electrified cable; and D, distinguishing the electrified cable and other electrified cables according to the existing harmonic voltage of the electrified cable, the induction voltage and the harmonic voltage detected at the lower end of the electrified cable. The induction voltage is loaded on the electrified cable to change the harmonic component on the electrified cable and distinguish the upper and lower terminals of the electrified cable, so manual model arrangement is not needed, and manpower cost is saved; a power supply does not need to be cut off for measurement, so normal service operation of equipment is not affected; and the upper and lower terminals of the electrified cable can be accurately distinguished from a large amount of cables.
Description
technical field [0001] The present invention relates to a communication power supply technology, in particular to a method, device and system for detecting an energized cable. Background technique [0002] In daily production maintenance and project cutover, it is often encountered that the upper and lower terminals of a certain live cable cannot be confirmed due to a series of reasons such as the loss of the cable identification. In the prior art, methods for confirming upper and lower terminals of energized cables mainly include: power-off measurement method, cable current measurement method and manual touch-and-find method. [0003] The power-off measurement method is to disconnect the upper end switch of the cable, and measure with an ammeter at the lower end of the cable to see if there is voltage. The power-off measurement method will affect the development of some services, especially for some important network elements that are not allowed to be powered off. This me...
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IPC IPC(8): G01R31/08
Inventor 王汉武彭晓川王琦邵泉许晓玲刘红梅李春梅王继文刘炜
Owner 中国移动通信集团宁夏有限公司