"When the projection type photoelectric speed sensor measures the speed of an object, the measuring disc will rotate with the measured object, and the light will continue to pass through the gaps along with the rotation of the measuring disc, and project through the gap to the photosensitive element. The projection type photoelectric speed sensor After the photosensitive element receives light and perceives the change in brightness, it outputs a current pulse signal. The pulse signal of the projection photoelectric speed sensor can be counted and calculated over a period of time to obtain the speed status of the measured object."
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