Optocoupler detector

Abstract

The invention provides an optocoupler detector, which comprises an input voltage regulation loop, an output loop and an optocoupler, wherein the input voltage regulation loop is connected to the inputend of the optocoupler, and the output loop is connected to the output end of the optocoupler; the input voltage regulation loop comprises a first power supply, an adjustable potentiometer and a current-limiting resistor; a positive electrode of the first power supply is connected to a positive electrode of the input end of the optocoupler through the adjustable potentiometer; a negative electrode of the first power supply is connected to a negative electrode of the input end of the optocoupler through the current-limiting resistor; the magnitude of the current in the input voltage regulationloop is adjusted through the adjustable potentiometer, so that the luminous intensity of a light-emitting diode in the optocoupler is changed, and thus the voltage of the output end of the optocoupler is adjusted, and whether the optocoupler is qualified or not is judged according to the voltage of the output end of the optocoupler. The problems existing in detection through a universal meter inthe prior art are solved, the detection accuracy rate of an optocoupler element by using the optocoupler detector reaches 100%, and meanwhile, the detection efficiency is greatly improved, and the labor and the detection time cost are saved.

Description

technical field [0001] The invention relates to the technical field of rail transit, in particular to an optocoupler detection device, in particular to an optocoupler element detection device for a metro vehicle braking resistor control box. Background technique [0002] Optocoupler is also called opto-isolator or opto-coupler, referred to as opto-coupler. It is a device that uses light as a medium to transmit electrical signals. Usually, the emitter (infrared light-emitting diode LED) and the light receiver (photosensitive semiconductor tube, photoresistor) are packaged in the same package. When the input terminal is powered on, the light emitter emits light, and the light receiver generates photocurrent after receiving the light, which flows out from the output terminal, thus realizing the "electricity-optical-electricity" conversion. [0003] At present, a multimeter is generally used to detect whether the optocoupler is good or bad, but this method has complex operation...

AI Technical Summary

Problems solved by technology

[0003] At present, multimeters are generally used to detect the quality of optocouplers, but this method has complex operations, low detection efficiency, and easy false detection

[0004] In the actual production process, when the optocoupler components detected by ordinary methods are installed in the braking resistor control boxes of subway vehicles, the failure rate of the braking resistor control boxes is 30%-50% due to the optocoupler components, making the manufacturing A large number of repairs are required for the debugging of the dynamic resistance control board

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