Application principle and industry definition of photoelectric encoder

The photoelectric encoder is a rotary position sensor, which is widely used in the measurement of angular displacement or angular rate in modern servo systems. Its rotating shaft is usually connected with the measured rotating shaft and rotates with the measured shaft. It can convert the angular displacement of the measured shaft into a binary code or a series of pulses.

　　 Photoelectric encoders are divided into two types: absolute and incremental. Incremental photoelectric encoder has the advantages of simple structure, small size, low price, high precision, fast response speed, stable performance, etc., and it is more widely used. In the high-resolution and large-range angular rate/displacement measurement system, the incremental photoelectric encoder is more advantageous. Absolute encoders can directly give digital information corresponding to each angle of rotation, which is convenient for computer processing, but when the feed number is greater than one revolution, special processing must be done, and more than two encoders must be connected by a reduction gear , To form a multi-level detection device, making its structure complex and high cost.