Metal wire meter resistance continuous precision testing device and method

Abstract

The invention relates to a metal wire meter resistance continuous precision test device and method. The device comprises an unspooling device and a spooling device, wherein a resistance acquisition device is arranged between the unspooling device and the spooling device; a plurality of test insection stripes are uniformly distributed on the circumference of the circumferential outer wall of a first lower roller conductive skeleton of a lower roller of a first upper-lower roller device of the resistance acquisition device for sequentially contacting a to-be-tested wire during a rotation process; the circumferential outer wall of the first lower roller conductive skeleton is fixed with a first lower roller elastic sleeve; a first insulation layer is arranged between the first lower roller conductive skeleton and a rotation shaft; the lower roller of a second upper-lower roller device comprises a second lower roller conductive skeleton for contacting a to-be-tested wire, and a second insulation layer is arranged between the second lower roller conductive skeleton and the rotation shaft; and both the first lower roller conductive skeleton and the second lower roller conductive skeletonare connected with a resistance measurement device through conductive test heads. Continuous test on a whole coil of wire meter resistance can be realized, uniformity of the whole wire meter resistance is ensured, and the precision is high.

Description

Technical field [0001] The invention relates to the field of metal wire meter resistance testing, in particular to a continuous precision test device and test method for metal wire meter resistance. Background technique [0002] For commonly used resistance wires such as nickel-chromium wire, iron-chromium-aluminum wire, tungsten-aluminum wire, etc., in order to ensure stable heating power and product interchangeability, it is necessary to test its resistance. For extremely thin resistance wires, in order to accurately measure their diameter, there are methods to calculate the wire diameter by weight, or to calculate the diameter by testing the resistance value. For high-precision resistance wires used in aviation, aerospace and other fields, the resistance accuracy is required to be 1% or less. Conventional methods cannot accurately test the resistance uniformity due to excessive errors. [0003] For testing the resistance of the resistance wire, there are related reports in Chin...

AI Technical Summary

Problems solved by technology

For high-precision resistance wires used in aviation, aerospace and other fields, the resistance accuracy is required to be 1% or even lower. Conventional methods cannot accurately test the resistance uniformity due to excessive errors.

[0003] There are related reports in China for testing the resistance of resistance wire meters. For example, Zhou Dan et al. have prepared a fixture for electric heating wire meter resistance test device, but the fixture can only provide a single clamping test, and the wire will be damaged after the test. Indentation on the surface, etc., low test efficiency; Chai Zhiqing used the "voltage-current method" to prepare the continuous meter resistance test device. This method is controlled by a single-chip microcomputer, and the process is complicated. Due to digital-to-analog conversion and limited precision of components, the accuracy can only reach ±2 %, unable to meet the requirements of high-precision continuous meter resistance test

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