Multi-turn absolute value encoder and position detecting method

Abstract

The invention relates to the technical field of industrial control, in particular to a multi-turn absolute value encoder and a position detecting method based on the multi-turn absolute value encoder.The multi-turn absolute value encoder comprises a single chip microcomputer, a permanent magnet and at least one magnetic angle sensor, wherein the permanent magnet is installed on an object to be detected and rotates along with the object to be detected; the at least one magnetic angle sensor is arranged on the periphery of the permanent magnet, so as to detect a single-turn absolute angle valueof the object to be detected; a zero position of the single-turn absolute angle value is calibrated and stored in the single chip microcomputer; and an output end of the at least one magnetic angle sensor is connected with the single chip microcomputer separately. Compared with an existing multi-turn absolute value encoder, the multi-turn absolute value encoder disclosed by the invention has simpler structure, can effectively reduce the cost and design difficulty, is high in reliability and stability, and realizes the multi-turn position detection at a low cost.

Description

technical field [0001] The invention relates to the technical field of industrial control, in particular to a multi-turn absolute encoder and a position detection method based on the multi-turn absolute encoder. Background technique [0002] The encoder is an important part of the robot. It can be divided into incremental and absolute value according to the encoding form, and can be divided into single-turn and multi-turn according to the way of recording the circle. Among them, the technical difficulty of the multi-turn absolute encoder is the most difficult. [0003] At present, a typical multi-turn absolute value encoder is composed of a single-turn absolute value grating or a magnetic grating plus a multi-turn counting mechanism of a gear, and the gear mechanism is complex in structure, difficult to design and process, and high in cost. There is also an encoder that realizes the multi-turn function through a complex circuit. The structure of the circuit is relatively co...

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Problems solved by technology

[0003] At present, a typical multi-turn absolute value encoder is composed of a single-turn absolute value grating or a magnetic grid plus a multi-turn counting mechanism of a gear, and the gear mechanism has a complex structure, which is difficult to design and process, and the cost is high

There is also an encoder that realizes the multi-turn function through a complex circuit. The structure of the circuit is relatively complicated, and it is very difficult to achieve high stability and reliability.

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