High-precision magnetic field detection and decoding circuit based on CAN bus

Abstract

The invention discloses a high-precision magnetic field detection and decoding circuit based on a CAN bus. Bipolar magnetic steel is designed and arranged in a rudder shaft, the magnetic steel rightlyfaces a magnetic coding chip, and the coding chip measures a rotating magnetic field; a special SSC interface is used for sending a measuring result to a main control chip MCU; and the MCU completesreceiving and decoding of the magnetic field to obtain a corresponding rotating angle of the rudder shaft. After the MCU completes calculation, digital signals are sent to a servo control circuit in real time through a CAN bus control module, and closed-loop control over a servo system is achieved. According to the high-precision magnetic field detection and decoding circuit based on the CAN bus,non-contact measurement of a system is achieved by adopting a non-contact measuring method based on magnetic field detection and decoding, and the working reliability of a product is improved. The difficulty of circuit design is greatly lowered based on a CAN bus communication mode, circuits can be implemented more easily in the distributing and wiring process, the space size of a circuit board can be effectively saved, and meanwhile the circuit design cost can be effectively saved.

Description

technical field [0001] The invention relates to a high-precision magnetic field detection and decoding circuit based on CAN bus, which is a rotating magnetic field detection and decoding circuit for non-contact measurement of angular displacement. technical background [0002] With the development of servo mechanisms in the direction of high precision, high reliability, digitalization, and integration, the requirements for sensors are getting higher and higher. They must have the characteristics of strong environmental adaptability, accurate measurement, and high linearity, so that the actuators can monitor the flight of missiles in real time. track control. At present, the obvious advantage of the digital sensor based on magnetic encoding is that it directly outputs angle information by means of magnetic sensitivity technology. Its non-contact performance increases the wear resistance of the sensor, improves the reliability of the product, and has high angular accuracy with...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a kind of indirect measurement of rotating magnetic field based on CAN bus communication, and complete high-precision magnetic field decoding, thereby realizing the circuit of non-contact measurement and control of angular displacement, solving the problem of complex peripheral circuit of analog potentiometer, many error links, Long-term wear of brushes brings problems such as system oscillation and high application costs

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