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The principle of photoelectric encoder

Optical encoders, is a means of conversion to convert the output shaft on the machine geometry displacement pulsed or digital sensor. This is by far the most widely used sensors, photoelectric encoder is detected by the grating disc and optical devices. Grating disc is in the circle of a certain diameter parts opened a number of rectangular holes on the Board. Because of the optical encoder and motor shaft, motor spins, grating and speed of rotation of the motor, light emitting diodes and other electronic components of the test device to measure a number of pulses through calculations per second the number of photoelectric encoder output pulse will reflect the current motor speed. In addition, to determine the rotation direction, encoder can also provide a phase difference of 90. Two pulse signal.