Principle of absolute encoder

Because each position is absolutely unique, absolute rotary encoders do need power-off memory, are used more more widely in angle length measurement positioning control of various industrial systems.

working principle

The code disc of the absolute encoder is engraved with multiple circles of engraved lines, each circle of engraved lines is engraved in the manner of 2, 4, 8, 16... arranged in sequence the inner circle to the outer circle to form a complete binary position map . In this way, each position of the encoder can obtain a unique set of corresponding binary codes within a 360-degree circle by reading the map composed of these scribe lines. This is the basic working principle of absolute encoders.

Rotate a single-turn absolute encoder measure each engraved line of the code wheel during the rotation to obtain a unique code. When the rotation exceeds 360 degrees, the code returns to the origin, which does comply with the principle of absolute code uniqueness. The encoder can only be used for measurement within a 360-degree rotation range is called a single-turn absolute encoder.

If you want to measure more than 360 degrees of rotation, you must use a multi-turn absolute encoder.

The multi-turn absolute encoder is based on the single-turn absolute encoder, adding a module that uses mechanical gear transmission to complete the number of revolutions, realizes the corresponding relationship of the encoder position value.

The position value output by the absolute encoder is determined by the mechanical position of the encoder, is affected by external factors such as power failure interference. The absolute encoder determines the uniqueness of each position by the mechanical position. It does need other reference points, nor does it need to keep counting. When it needs to know its location, when to read its location. In this way, the anti-interference performance of the encoder the reliability of the data are greatly improved.

DEUPREE (Qingdao) Industrial Technology Co., Ltd. is an integrated enterprise focusing on the research development of automated industrial technology equipment manufacturing. The company’s products mainly include rotational motion sensors, linear displacement sensors, object recognition sensors, laser rangefinders, process Control measurement instruments, signal detection systems, signal transmission systems, immature drive systems, UPS safety power supply systems, automation equipment energy-saving cleaning auxiliary equipment systems are limited to this. We can also customize flexibly customize according to customer needs. Meet the different needs of different customers.