Absolute encoder circuit with controller local area network bus

Abstract

The invention relates to an absolute encoder circuit with a controller area network bus, belonging to an encoder data processing circuit in the photoelectric detecting technology field. The technical problem to be solved is to provide an encoder circuit with the controller area network bus. The technical scheme comprises a light source, an encoding disc, an amplification and digital processing circuit, a single chip machine, a controller area network bus, a photoelectric isolator and an input / output driver. The light emitted by the light source is absorbed by the single chip machine through the modulation of the encoding disc and the amplification and digital processing, the output / input of the single chip machine is connected with the output / input of the controller area network bus, the output of the controller area network bus is connected with the input of the photoelectric isolator, and the output of the photoelectric isolator is connected with the input / output driver; the input of the controller area network bus is connected with the output of the photoelectric isolator, and the input of the photoelectric isolator is connected with the output of the input / output driver. The circuit can realize the intelligent control of data communications with the multi-host mode.

Description

1. Technical field [0001] The invention belongs to an absolute encoder data processing circuit related to the technical field of photoelectric detection. 2. Background technology [0002] Absolute photoelectric shaft encoder is a digital angle measuring device, which measures the angular position and angular velocity of the measured rotating shaft in real time, converts the shaft angle information into binary code, and connects with the control system to realize real-time measurement. The circuit of the encoder is composed of a data acquisition part and a data processing part. The single-chip microcomputer is the core of the encoder circuit system. After collecting the coarse code and fine code signals of the encoder, it undergoes data processing such as fine code subdivision, code channel correction, and electrical zero adjustment, and finally outputs binary codes. [0003] The prior art closest to the present invention is the absolute photoelectric shaft angle encoder cir...

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