Automatic test system for performance of multi-position switch and test method for same

Abstract

The invention discloses an automatic test system for the performance of a multi-position switch, which is characterized by comprising a switch clamp unit, a switch rotation motor unit, a test circuit unit, a PLC (programmable logic controller) unit, a power control unit and a man-machine interaction unit, wherein a test end of the test circuit unit is connected with the switch to be tested, an output end of the test circuit unit is connected with the PLC unit, and a control end of the PLC unit is connected with an input end of the test circuit unit. A test method includes: testing on-resistance and open resistance of contacts at positions by the aid of the test circuit unit; converting corresponding constant current into voltage; comparing the voltage with reference voltage provided by the PLC unit; and outputting decision outcome to the PLC unit. The test circuit unit is used for testing the on-resistance and the open resistance of each contact of the multi-position switch and converting the resistance into the voltage to be tested, so that the electrical performance of the multi-position switch is automatically tested.

Description

technical field [0001] The invention relates to a switch testing system and method, in particular to a multi-speed switch performance automatic testing system and testing method. Background technique [0002] In the current industrial control, smart home and Internet of Things control systems, several multi-way switches are often used intensively to control multi-way systems, so multi-level switches that realize such functions are used more and more frequently. In the modern production process, in order to ensure product quality, switches must undergo various performance tests, that is, to test the mechanical properties, electrical properties, and product life (number of times that can be used normally) of the switch. Now not only manufacturers have specific requirements for the testing and quality assurance of switch products, but also switch users will also conduct quality inspections of purchased switch components according to their own needs. [0003] Now there are some...

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Problems solved by technology

[0004] Inadequacies of the above tests: Most of the test systems focus on mechanical performance testing, designed for testing toggle switches, push button switches, pull switches, or simple switch continuity tests, for more accurate switch electrical Performance testing (that is: judging whether the contact resistance or open circuit resistance of the control switch is within a certain qualified range) has not yet been used a good method, and the life test of the switch is in a manual or semi-manual testing state. For continuous multi-gear rotation or Automated testing of toggle switches does not involve

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