Abstract:

In order to stabilize the work piece touch device of online automatic measurement in the vision measuring system and meet the camera's trigger function,this paper analyzes shot reflected light path and optical photoelectric detection performance of the trigger system based on the principle of synchronous photoelectric trigger mechanism.It designs the related signal processing circuit.According to the noise characteristics,it also analyzes the influence of the circuit background environment on the detection circuit.Through analysis,calculation,and experiment,this paper realizes the automatic testing function to meet the requirements of triggering for the measurement system.

Key words: vision measuring system;the work piece;synchronous trigger;photoelectric detection;signal detection