Method for measuring relay contact settling time and device thereof

Abstract

The invention provides a method for measuring relay contact settling time and a device thereof, which can simultaneously measure six groups of changeover contacts and has a measurement resolution of 1mu s. The device comprises a relay under test, a load unit, a signal conditioning unit, a data acquisition unit, a bus, a main control unit, an FPGA logical time sequence unit, a human-computer interaction unit and a coil drive unit; wherein the relay under test is connected with the load unit; the load unit is connected with the signal conditioning unit which is connected with the data acquisition unit; the data acquisition unit is connected with the bus which is connected with the main control unit and the FPGA logical time sequence unit; the main control unit is respectively connected with the human-computer interaction unit, the FPGA logical time sequence unit and the coil drive unit; and the coil drive unit is connected with the relay under test. The invention has the advantages of high accuracy of measurement, automatic measurement process, simple measurement procedures, easy operation, small size and light weight of measuring devices, and the like.

Description

(1) Technical field [0001] The invention relates to electromagnetic technology, in particular to a method for measuring the stable time of a relay contact and a device thereof. (2) Background technology [0002] The relay contact stabilization time can effectively reflect the contact reliability of the relay contact, and is an important measurement parameter in the screening test before the product leaves the factory. GJB requires that the contact stabilization time must be measured for aerospace relays above level 5 before leaving the factory. Aerospace relay contact stabilization time is defined as the maximum time allowed for the contacts to reach and maintain a static contact resistance state after the relay action and release time. At present, there are standard regulations for the measurement method and measurement conditions of the contact stabilization time of aerospace relays. Taking GJB 65B-99 as an example, the standard stipulates that the measurement of the stab...

AI Technical Summary

Problems solved by technology

[0003] At present, there are few special studies on the measurement of relay contact stabilization time. Relay manufacturers usually measure the contact voltage drop waveform manually with an oscilloscope to measure the stabilization time.

On the one hand, in order to improve the signal-to-noise ratio of the measured waveform, this method artificially increases the load voltage, which does not conform to the measurement conditions stipulated in the GJB standard.

On the other hand, the manual measurement method is greatly affected by subjective factors, the measurement results have large errors, the measurement process is complicated, and the efficiency is not high.

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