As5048a magnetic encoder control method and system based on state machine

Abstract

The invention discloses a control method and system of an AS5048A magnetic encoder based on a state machine, relates to the field of encoders, and solves the problems of testing and application of the AS5048A magnetic encoder. The control logic of the magnetic encoder includes an SPI protocol analysis module, an SPI control module, a state conversion module and an error monitoring module. The present invention realizes the SPI interface and data analysis with AS5048A through the FPGA control logic on the signal processing board, sends out the angle information analyzed by the AS5048A control module through the UART module through the serial port, and the level conversion circuit converts the TTL level into RS232 Flat, the angle measurement information of the magnetic encoder can be received through the serial port debugging assistant of the host computer. The obtained angle information is a digital quantity, which can be seamlessly connected with the controller without A / D acquisition, and can be widely used in non-contact measurement of various angles.

Description

technical field [0001] The invention relates to the technical field of encoders, in particular to a state machine-based AS5048A magnetic encoder control method, which is applied to non-contact measurement of various angles, and the obtained angle information can be applied to pan-tilt control, steering gear control, etc. Closed loop control of servo system. Background technique [0002] The encoder is a key component of the servo control system, mainly used to measure the angle and speed of the servo motor. The angle measurement of the servo control system mostly uses potentiometers, photoelectric encoders, and resolvers. Although the measurement accuracy is high, there are defects such as high cost, poor anti-interference performance, and large volume. Magnetic encoder is a kind of magnetoresistive effect encoder, which can realize non-contact angle measurement, no wear, good anti-interference effect, not easily affected by harsh conditions such as oil, dust, condensation,...

AI Technical Summary

Problems solved by technology

The angle measurement of the servo control system mostly uses potentiometers, photoelectric encoders, and resolvers. Although the measurement accuracy is high, there are defects such as high cost, poor anti-interference performance, and large volume.

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