System and method for testing electric conductivity of metal wire

A metal wire and testing system technology, applied in the field of electric power, can solve the problems of the straightness of the tested wire, which cannot be measured, and the wire cannot be guaranteed to be completely straight, and achieves the effect of reducing experimental errors.

Active Publication Date: 2014-01-15
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, people mostly use the bridge method to measure the electrical conductivity of metal wires and then convert it into electrical conductivity after calculation. This method needs to consider the influence of temperature on electrical resistance during the actual measurement process, so the measured resistance value needs to be corrected; In addition, the resistance measured by the bridge method can only be tested for a one-meter-long standard metal wire, and there are also requirements for the straightness of the tested wire
However, various wires cannot be guaranteed to be completely straight under actual service and test conditions, and some wires under test cannot be measured because they are less than one meter long.

Method used

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  • System and method for testing electric conductivity of metal wire
  • System and method for testing electric conductivity of metal wire
  • System and method for testing electric conductivity of metal wire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Such as figure 2 as shown, figure 2 It is the assembly diagram of the tested metal round bar wire and the fixture in the present invention.

[0058] Among the present invention, the special clamp 3 is formed by connecting the upper clamp and the lower clamp through fastening bolts. The assembly diagram of the tested metal round bar wire and the special fixture is as follows: figure 2 As shown, the upper fixture 10 and the lower fixture 11 clamp the metal round rod type metal wire 4 to be tested on the special fixture 3 through the fastening bolt A12, and the fastening bolt B13 fixes the whole set of special fixture 3 on the two-dimensional optical platform below 2, the connecting bolt 14 connects the multi-channel digital multimeter A7 to the special fixture 3 to form a test circuit.

[0059] When the metal wire 4 to be tested is a metal round rod wire, the conductivity of an LHA1 aluminum alloy wire with an unknown length and a circular cross section is measured....

Embodiment 2

[0063] Such as image 3 as shown, image 3 It is an assembly drawing of the tested metal plate and the fixture of the present invention.

[0064] Same as image 3 as shown, image 3 It is an assembly drawing of a plate-shaped metal wire with a rectangular cross-section and a special fixture. The upper fixture 10 and the lower fixture 11 clamp the plate-shaped metal conductor 4 to be tested on the special fixture 3 through the fastening bolt A12, and the fastening bolt B13 Fix the full set of special fixture 3 on the two-dimensional optical platform 2 below, and connect the multi-channel digital multimeter A7 to the special fixture 3 with connecting bolts 14 to form a test circuit.

[0065] When the metal wire 4 to be tested is a 6201 aluminum alloy of unknown length and a metal plate wire with a rectangular cross section, the specific process of measuring its conductivity is as follows:

[0066] Pass the tested metal wire 4 through such as image 3 As shown in the assembl...

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Abstract

The invention relates to the technical field of electric power, in particular to a system and method for testing the electric conductivity of a metal wire. The system comprises a direct-current power supply, a wire clamping system and a test system. The output end of the direct-current power supply is in series connection with the metal wire to be tested through a fixture. The metal wire to be tested is connected to an optical platform through a fixture. A first camera and a second camera are respectively and electrically connected with a computer. A multiple-pass digital multimeter V is connected with the metal wire to be tested and is further electrically connected with the computer. A multiple-pass digital multimeter A is connected with the metal wire to be tested through the direct-current power supply. Due to the adoption of the system and method for testing the electric conductivity of the metal wire, the electric conductivity of a metal wire of any length and section shape can be tested without considering the effect of the temperature on the resistance of the wire to be tested, and experiments are easy and quick to operate. The system and method greatly improve working efficiency, obviously improve testing accuracy and are suitable for all kinds of novel energy-saving metal wires.

Description

technical field [0001] The present invention relates to the field of electric power technology, in particular to a test system and method for the conductivity of metal wires, in particular, it adopts multi-channel digital multimeter measurement, camera recording and computer acquisition and analysis, and obtains the conductivity of the metal wire under test through calculation. Rate. The invention provides a whole set of testing equipment and a specific method for implementing the testing. Background technique [0002] Metal wires have an important application in the power industry, especially in recent years, various new energy-saving wires such as steel-core high-conductivity duralumin stranded wire, aluminum alloy-cored aluminum stranded wire and medium-strength all-aluminum alloy stranded wire have been favored by people. It is widely concerned that while these wires realize their power transmission function during actual use, people are more concerned about their elect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R27/08
Inventor 李春和吴细毛宋竹满王建东王飞张广平张哲峰
Owner STATE GRID CORP OF CHINA
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