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A contact resistance online monitoring device and method

A contact resistance and monitoring device technology, which is applied in the direction of measuring devices, measuring resistance/reactance/impedance, measuring electrical variables, etc., can solve the problems of increased monitoring cost, troublesome operation, and online monitoring of contact resistance measurement, so as to reduce monitoring cost, improve the accuracy of hidden dangers, and reduce the effect of effective data volume

Active Publication Date: 2021-06-04
合肥能安科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Conventional contact resistance measurement not only cannot be monitored online, but also is cumbersome to operate, and requires the use of ultra-high-precision instruments, which increases the cost of monitoring

Method used

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  • A contact resistance online monitoring device and method

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Experimental program
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Effect test

Embodiment 1

[0044] A contact resistance online monitoring device, please refer to figure 1 As shown, the contact resistance online monitoring device includes a first current sensor 1 , a first temperature sensor 2 , a second temperature sensor 3 and a processor 4 .

[0045] Wherein, the first current sensor 1 is used to monitor the current current on the cable of the electrical circuit loop, and the first temperature sensor 2 and the second temperature sensor 3 are respectively used to monitor the temperature at the position of the upper contact resistance of the electrical circuit loop and the temperature different from The temperature at another location than the location of the contact resistance. The processor 4 is used to process the current current monitored by the first current sensor 1 and the temperature of different positions on the electrical circuit loop monitored by the first temperature sensor 2 and the second temperature sensor 3, and then judge whether the contact resistan...

Embodiment 2

[0071] Another embodiment of the present invention provides an online contact resistance monitoring method, which is implemented based on the contact resistance online monitoring device provided in Embodiment 1, wherein: the contact resistance online monitoring method includes the following steps :

[0072] Step S1: Obtain the current current of the cable in the electrical circuit loop where the contact resistance is located.

[0073] Specifically, the relationship between the contact resistance and the cable is: there is a connection between the cable and the terminal on the electrical circuit loop, and the connection between the cable and the terminal forms the contact resistance. The first current sensor 1 is arranged on the electrical circuit loop, preferably the first current sensor 1 is arranged on the electrical circuit loop near the connection between the cable and the terminal, and the current of the cable is monitored in real time by the first current sensor 1, That...

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Abstract

The invention belongs to the field of contact resistance monitoring, in particular to an online contact resistance monitoring device and method. The contact resistance online monitoring device includes a processor and a first current sensor, a first temperature sensor and a second A temperature sensor; wherein, the first temperature sensor is disposed at the contact resistance, and the second temperature sensor is disposed at another position different from the position of the contact resistance. The invention judges whether the contact resistance is normal or not by detecting the temperature difference of the electric wires in the electric circuit loop through the first current on the electric circuit loop within the safe working range. Simple, convenient and low-cost online detection of contact resistance is realized.

Description

technical field [0001] The invention relates to the field of contact resistance monitoring, in particular to an online contact resistance monitoring device and method. Background technique [0002] Contact resistance, as the resistance presented between conductors, generally requires the contact resistance to be below 10-20 mohm. Some switches are required to be below 100-500uohm. Excessive contact resistance will cause the following hazards: 1. The contact point of the equipment will be heated; 2. If the time is too long, the service life of the equipment will be shortened; 3. In severe cases, it will cause electrical fires and cause economic losses. [0003] Conventional contact resistance monitoring is obtained by using instruments to calculate according to Ohm's law in the state of power failure. Moreover, since the contact resistance is very small, using an instrument to calculate the contact resistance according to Ohm's law requires the use of a high-precision instr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R27/02
CPCG01R27/02
Inventor 单立辉吴杰
Owner 合肥能安科技有限公司