Adjustable trigger voltage pulse width control circuit

Abstract

The invention discloses an adjustable trigger voltage pulse width control circuit which comprises: a single-chip microcomputer which is used for controlling a light source and transmitting a pulse width modulation signal and receiving a trigger signal; a digital-to-analog conversion circuit which is used for receiving the pulse width modulation signal sent by the single-chip microcomputer and converting the pulse width modulation signal into an analog signal; an amplifying circuit which is used for amplifying the analog signal output by the digital-to-analog conversion circuit and outputting the amplified analog signal as a reference voltage; a first amplifier which receives the reference voltage and a comparison voltage, and outputs a signal voltage to the single-chip microcomputer aftercomparison; and an anti-reverse-connection protection circuit which is used for being connected to the amplifier and providing the comparison voltage. According to the invention, the pulse width modulation signal output by the single-chip microcomputer is amplified into the reference voltage after digital-to-analog conversion, and if the trigger voltage is relatively low and the required speed isrelatively high, the reference voltage can be lowered and the input pulse width can be set to be small; and the reference voltage is adjusted and input pulse width is set separately according to actual needs so as to achieve stronger anti-interference capability.

Description

technical field [0001] The invention relates to the field of optical technology, in particular to an adjustable trigger voltage pulse width control circuit. Background technique [0002] Currently on the market for machine vision light source controllers, the trigger control can only use a fixed range of trigger voltage. When there is interference or other problems on site, it cannot be easily changed when the low voltage or high voltage trigger needs to be replaced, and the controllers currently on the market cannot By identifying the pulse width, and setting the trigger pulse width condition to trigger and control the light source. Contents of the invention [0003] In view of the fact that the above-mentioned existing trigger control can only use a fixed range of trigger voltage, when there is interference or other problems on site, it cannot be easily changed when the low-voltage or high-voltage trigger needs to be replaced, and the controllers currently on the market ...

AI Technical Summary

Problems solved by technology

[0003] In view of the fact that the above-mentioned existing trigger control can only use a fixed range of trigger voltage, when there is interference or other problems on site, it cannot be easily changed when the low-voltage or high-voltage trigger needs to be replaced, and the controllers currently on the market cannot pass the identification of the pulse width. And set the trigger pulse width condition to trigger the technical problem of controlling the light source

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