High-precision multi-turn magnetoelectric absolute value angle sensor and implementation method

Abstract

The invention discloses a high-precision multi-turn magnetoelectric absolute value angle sensor and an implementation method. The high-precision multi-turn magnetoelectric absolute value angle sensorcomprises a main gear assembly, an auxiliary gear assembly and a PCB combination. The main gear assembly and the auxiliary gear assembly comprise a main gear shaft and an auxiliary gear shaft which are provided with a main gear and an auxiliary gear, and the tops are provided with a main magnet and an auxiliary magnet; the main gear assembly and the auxiliary gear assembly are rotatably connectedthrough engagement of the main gear and the auxiliary gear; the PCB combination comprises a PCB, and a main Hall element array and an auxiliary Hall element array are arranged on the PCB; and the maingear assembly and the auxiliary gear assembly are rotatably arranged on the lower portion of the PCB combination. The implementation method of the absolute value angle comprises the steps that outputsignals of the main Hall element array and the auxiliary Hall element array are sampled, the rotating angles of the main gear assembly and the auxiliary gear assembly are calculated, then angle fusion calculation is performed on the rotating angles, and finally the absolute value angle is obtained. A meshing gear ratio of the main gear to the auxiliary gear is close to 1.

Description

technical field [0001] The invention relates to the technical field of angle sensors, in particular to a high-precision multi-turn magnetoelectric absolute value angle sensor and a realization method. Background technique [0002] As an angle sensor, the magnetoelectric angular displacement sensor adopts a non-contact rotating structure, has no mechanical friction, has a long life, and is smaller than the photoelectric encoder, and has a fast response speed, which fully meets the high-speed rotation requirements of industrial control and aerospace servo systems. It has the technical characteristics of low cost and high reliability. [0003] According to the signal output format, the magnetoelectric angular displacement sensor is divided into two types: absolute magnetoelectric angular displacement sensor and incremental magnetoelectric angular displacement sensor; according to the range, it can be divided into single-turn magnetoelectric angular displacement sensor and multi...

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Problems solved by technology

[0004] Patent No. CN 202885840 U provides a multi-turn magnetoelectric absolute value angle sensor, which uses a variable speed gearbox and a magnetic induction circuit board to realize multi-turn angle measurement. The variable speed gearbox includes an input shaft and a plurality of output shafts. The transformation ratio of an output shaft among the shafts to the input shaft is equal to 1, and the transformation ratios of the other output shafts and the input shaft among the output shafts are not equal to each other and are all greater than 1. A magnet is arranged at the end of the output shafts. There are multiple sensing chips corresponding to the magnets on the magnetic induction circuit board; this solution requires the sensor to use a gear box, resulting in large volume, heavy weight, and high cost, thus limiting the application range of the multi-turn magnetoelectric absolute value angle sensor , so that it can only be used in areas that require low volume and weight and are not sensitive to cost; at the same time, in order to ensure the ratio accuracy of the gear box, the requirements for machining and assembly accuracy are extremely high, so the absolute value of the multi-turn magnetoelectric type The actual production of angle sensors is extremely difficult and cannot be widely applied

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