An electromagnetic induction torque angle sensor

Abstract

The invention relates to a sensor, and especially relates to an electromagnetic induction type torque angle sensor. The electromagnetic induction type torque angle sensor comprises a PCB, an input rotor and an output rotor. The input end of an input shaft signal acquisition unit on the PCB is connected with a first rotating angle, the output end of the input shaft signal acquisition unit outputs a first angle signal. The input end of an output shaft signal acquisition unit is connected with a second rotating angle, and the output end of the output shaft signal acquisition unit outputs a second angle signal. The input end of the signal processing unit receives the first and second angle signals. The first angle signal and a Hall angle signal collected by a Hall sensor obtain a steering wheel angle signal through a vernier algorithm. The signal processing unit outputs a torque signal. At least one anti-interference layer is arranged on a layer in the middle of a layer where the input shaft signal acquisition unit is located and a layer where the output shaft signal acquisition unit is located. In this way, internal interference of the sensor is greatly reduced. The electromagnetic induction type torque angle sensor can measure the steering wheel angle signal and the torque signal, and is compact in structure and high in measuring precision.

Description

technical field [0001] The invention relates to a sensor, in particular to an electromagnetic induction torque angle sensor. Background technique [0002] The electric power steering system of a motor vehicle is mainly composed of a torque angle sensor, a vehicle speed sensor, an electronic main controller, a reducer, an electric motor, and a mechanical steering gear. The torque angle sensor is the core part of the electric power steering system, and the torque signal is used by the ECU to control the motor. Provide the basis for appropriate auxiliary torque. The steering wheel torque signal reflects the absolute position of the current steering wheel. It can be used for functions such as automatic steering wheel return, intelligent parking, and automatic navigation. The accuracy of the measured angle difference is important for the entire electric power steering system. Impact. [0003] In the traditional EPS system, the torque sensor and the rotation angle sensor are inst...

AI Technical Summary

Problems solved by technology

[0003] In the traditional EPS system, the torque sensor and the rotation angle sensor are installed separately, mainly including contact sensor, Hall sensor and inductive sensor. Most of the contact EPS sensors only have torque measurement function, and the life of the sensor is short; The structure of the Hall-type EPS sensor is complex, and the cost is high, and it is more sensitive to the interference of the external magnetic field; the inductive EPS sensor does not integrate the steering wheel angle measurement signal, so it is urgent to provide a function that can simultaneously measure the steering wheel angle signal and measure Torque angle sensor with torque signal function

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