Working principle of photoelectric encoder

Guide: The main working principle of photoelectric encoder is photoelectric conversion, but it can be divided into incremental type, absolute type and hybrid incremental type according to the different principles. So how does photoelectric conversion work? What are the differences in the working principles of these three types of photoelectric encoders? Next, let's take a look together~

1. The working principle of photoelectric encoder--Introduction

The photoelectric encoder, also known as the handwheel pulse generator, or handwheel for short, is a sensor that converts the mechanical geometric displacement of the output shaft into pulses or digital quantities through photoelectric conversion. It is mainly used in various numerical control equipment. The most used sensor.

Encoder|Transmitter|Soft starter|Power supply|VFD|Light curtain|Servo products|Human-machine interface|Solenoid valve|Cylinder|Actuator|Flow meter|Transformer|Thyristor|Sensor|Deceleration drive gearbox reducer|Linear guide|Circuit breaker|Refrigeration compressorAll industrial products of okplazas are purchased from the original factory or formal channels of agents to ensure the original authenticity, which perfectly solves the problem of industrial product sample procurement and small-batch procurement for the majority of engineers and purchasing personnel.

Second, the working principle of photoelectric encoder--classification

The photoelectric encoder has two classification standards: national standard and non-national standard. According to different raw materials, it can be divided into natural rubber type, plastic type, bakelite type and cast iron unloading. According to different styles, it can be divided into round flange type, inner corrugated type, flat surface, dial type, etc., according to different working principles. Divided into optical type, magnetic type, induction type and capacitive type, according to the scale method and signal output form can be divided into incremental type, absolute type and mixed type.

Encoder|Transmitter|Soft starter|Power supply|VFD|Light curtain|Servo products|Human-machine interface|Solenoid valve|Cylinder|Actuator|Flow meter|Transformer|Thyristor|Sensor|Deceleration drive gearbox reducer|Linear guide|Circuit breaker|Refrigeration compressorAll industrial products of okplazas are purchased from the original factory or formal channels of agents to ensure the original authenticity, which perfectly solves the problem of industrial product sample procurement and small-batch procurement for the majority of engineers and purchasing personnel.

Three, the working principle of photoelectric encoder

The photoelectric encoder is mainly composed of a grating disc and a photoelectric detection device. In the servo system, the grating disc and the motor are coaxial to cause the rotation of the motor to drive the rotation of the grating disc, and then output several pulse signals through the photoelectric detection device, according to each signal The number of pulses per second can calculate the current motor speed.

　　The code wheel of the photoelectric encoder outputs two optical codes with a phase difference of 90 degrees, and the rotation direction of the motor can be judged according to the state of the dual-channel output optical code.

Encoder|Transmitter|Soft starter|Power supply|VFD|Light curtain|Servo products|Human-machine interface|Solenoid valve|Cylinder|Actuator|Flow meter|Transformer|Thyristor|Sensor|Deceleration drive gearbox reducer|Linear guide|Circuit breaker|Refrigeration compressorAll industrial products of okplazas are purchased from the original factory or formal channels of agents to ensure the original authenticity, which perfectly solves the problem of industrial product sample procurement and small-batch procurement for the majority of engineers and purchasing personnel.

Fourth, the working principle of photoelectric encoder--incremental encoder

Incremental encoder is a kind of photoelectric encoder, its main working principle is also photoelectric conversion, but its output is three groups of square wave pulses A, B, Z, and the phase difference of A and B pulses is 90 degrees to judge The rotation direction of the motor, Z pulse is one pulse per revolution to facilitate the positioning of the reference point.

Encoder|Transmitter|Soft starter|Power supply|VFD|Light curtain|Servo products|Human-machine interface|Solenoid valve|Cylinder|Actuator|Flow meter|Transformer|Thyristor|Sensor|Deceleration drive gearbox reducer|Linear guide|Circuit breaker|Refrigeration compressorAll industrial products of okplazas are purchased from the original factory or formal channels of agents to ensure the original authenticity, which perfectly solves the problem of industrial product sample procurement and small-batch procurement for the majority of engineers and purchasing personnel.

Five, the working principle of photoelectric encoder--absolute encoder

The main working principle of the absolute encoder is photoelectric conversion, but its output is digital. There are several concentric code channels on the code disc of the absolute encoder, and each code channel is crossed by a light-transmitting and opaque sector. The number of code channels is the number of binary digits of the code disk where it is located. The two sides of the code disk are respectively the light source and the photosensitive element. The difference of the position of the code disc will lead to different light receiving conditions of the photosensitive element and different output binary numbers. Binary numbers to determine the position of the code wheel.

Encoder|Transmitter|Soft starter|Power supply|VFD|Light curtain|Servo products|Human-machine interface|Solenoid valve|Cylinder|Actuator|Flow meter|Transformer|Thyristor|Sensor|Deceleration drive gearbox reducer|Linear guide|Circuit breaker|Refrigeration compressorAll industrial products of okplazas are purchased from the original factory or formal channels of agents to ensure the original authenticity, which perfectly solves the problem of industrial product sample procurement and small-batch procurement for the majority of engineers and purchasing personnel.

Six, the working principle of photoelectric encoder--hybrid absolute encoder

　　 The main working principle of the hybrid absolute encoder is also photoelectric conversion, which is different from incremental and absolute encoders in terms of output. There are two sets of information output by the hybrid absolute encoder. One set of output information is three sets of square wave pulses, A, B, and Z, which is completely different from the output of an incremental encoder. The other set of output information has an absolute information function. Mainly used for the detection of magnetic pole position.

Encoder|Transmitter|Soft starter|Power supply|VFD|Light curtain|Servo products|Human-machine interface|Solenoid valve|Cylinder|Actuator|Flow meter|Transformer|Thyristor|Sensor|Deceleration drive gearbox reducer|Linear guide|Circuit breaker|Refrigeration compressorAll industrial products of okplazas are purchased from the original factory or formal channels of agents to ensure the original authenticity, which perfectly solves the problem of industrial product sample procurement and small-batch procurement for the majority of engineers and purchasing personnel.