On-line automatic compensation resistance tester

Abstract

The invention discloses an on-line automatic compensation resistance tester, comprising a processor, a step-down rectifier filter circuit connected with the processor, an AD conversion circuit connected with the processor, a signal amplifying circuit connected with the signal input end of the AD conversion circuit, four groups of signal detection circuits connected with the input end of the signal amplifying circuit, an Ethernet interface circuit connected with the processor, an RS485 communication circuit connected with the processor, an RS232 communication circuit connected with the processor, a display screen circuit connected with the processor, an indicating lamp circuit connected with the processor, a temperature and humidity detection circuit connected with the processor and a data storage circuit connected with the processor. The on-line automatic compensation resistance tester is simple in structure, can effectively improve the detection precision and the detection efficiency, ensures instantaneity and validity of data, greatly improves the applicability and the detection efficiency, and is strong in applicability and good in practicability.

Description

technical field [0001] The invention belongs to the technical field of resistance detection equipment, and in particular relates to an online automatic compensation resistance tester. Background technique [0002] Measuring DC resistance is an indispensable and important item in the inspection of motors, transformers and other products. According to its resistance value, it can be judged whether there are defects such as short circuit, open circuit, bad coil, bad welding or bad wiring in the conductive circuit. At present, in actual measurement, most of them use the DC bridge method. If the resistance value of the tested resistance is less than 1 ohm, the double-arm bridge is used for measurement, and for the resistance greater than 1 ohm, the single-arm bridge is used for measurement. When used in production lines or laboratories, there are the following disadvantages: before measurement, it is necessary to estimate the resistance of the coil under test, and manually sele...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an online automatic compensation resistance tester, which aims to solve the technical deficiency in the traditional technology that the magnification cannot be automatically switched, which will affect the detection accuracy and detection efficiency.

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