A multi-turn absolute encoder and its working method

Abstract

The present invention discloses a multi-turn absolute value encoder, comprising: a detection module, a power supply working module and a power-off working module; the detection module is used for performing power-on detection and power-off detection; when the power-on is detected, the power supply working module works; when the power-off is detected, the power-off working module works; the power working module includes a single-turn absolute value encoder and a single-chip microcomputer, the single-chip microcomputer collects rotor position information of a motor via the single-turn absolute encoder; the power-off working module includes a common encoder and a low-power single-chip microcomputer, and the low-power microcomputer collects the rotor position information of the motor through the common encoder. The multi-turn absolute value encoder with low-cost high-performance design combines advanced algorithms, to achieve low cost, high precision, small size and unlimited measurement range is unlimited, and achieves continuous long-term use without external power supply. The invention also discloses a working method of a multi-turn absolute value encoder.

Description

technical field [0001] The present invention relates to encoder technology, in particular to a multi-turn absolute encoder and its working method. Background technique [0002] An encoder is a device that converts angular displacement or linear displacement into an electrical signal. The former is called a code disc, and the latter is called a yardstick. A rotary encoder is a device that measures the position of the motor shaft or the rotational speed of the motor shaft. There are two main types of rotary encoders, absolute encoders and incremental encoders. [0003] The absolute encoder can record the absolute position of the motor rotor. When the system is powered off, it can still record the position information of the motor shaft. When the system is powered on, it can directly read the current position information of the motor shaft. The incremental encoder records the position change of the motor rotor, converts the displacement into a periodic electrical signal, and t...

AI Technical Summary

Problems solved by technology

[0004] At present, most of the multi-turn absolute encoders are optical multi-turn absolute encoders, which contain mechanical gear sets, which are expensive and bulky, which is not conducive to integration and miniaturization. Since the mechanical gear sets are used to record the number of turns, so Metering range is limited

The optical multi-turn absolute value encoder has high environmental requirements due to the use of grating code discs and optical detection methods. In dusty and harsh environments, particles will penetrate into the optical path and easily cause failure. It is composed of photoelectric code discs and mechanical gears. Optical multi-turn absolute encoder has a limited range of detection turns

[0005] After the traditional electronic multi-turn encoder is powered off, due to high power consumption, it cannot count for a long time while the encoder is rotating.

The photoelectric multi-turn absolute value encoder uses a grating code disc. The photoelectric code disc and the mechanical gear set are very fragile, so they are very sensitive to impact and vibration, and it is easy to cause the code disc and the mechanical gear set to break during use, affecting the service life.

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