Adjustable trigger voltage pulse width control method

Abstract

The invention discloses an adjustable trigger voltage pulse width control method. The method comprises the following steps: 1, sending an initial pulse width modulation signal through a single chip microcomputer; 2, enabling the initial pulse width modulation signal to enter a digital-to-analog conversion circuit, and converting a digital signal into an analog signal to be output; 3, externally connecting the analog signal obtained in step 2 with an amplification voltage through an amplification circuit; and connecting the first amplifier with an anti-reverse connection protection circuit; and 4, enabling the first amplifier to compare the reference voltage signal with the comparison voltage signal and then output a trigger signal needing to be sent to a single-chip microcomputer. 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 is relatively high, the reference voltage can be lowered and the input pulse width can be set to be small; nd 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 method. 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 c...

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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