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Absolute encoder circuit with controller local area network bus

A local area network bus and controller technology, which is used in telephone communication, electrical components, data exchange through path configuration, etc., to achieve the effect of good openness and flexible communication methods

Inactive Publication Date: 2008-10-22
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main problem with this circuit is that the data transmission between the encoder circuit and the control system can be done in two ways: parallel and serial.

Method used

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  • Absolute encoder circuit with controller local area network bus
  • Absolute encoder circuit with controller local area network bus
  • Absolute encoder circuit with controller local area network bus

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Experimental program
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Embodiment Construction

[0016] The invention according to figure 2 The circuit configuration shown is implemented. Wherein the light source 5 adopts an infrared light-emitting diode; the code disc 6 adopts a code disc and slit matching structure, and the number of digits is determined according to needs; the amplification and data processing circuit 7 adopts the LM2902 amplifier produced by the National Semiconductor Corporation of the United States and the MAX114A / D converter of the American Maxim Company Single-chip microcomputer 8 adopts American Intel N80C196KC single-chip microcomputer; controller LAN bus 9 adopts Dutch Philips SJA1000; output photoelectric isolator 10 and input photoelectric isolator 11 adopt American-made 6N137 device; input / output driver 12 adopts Dutch Philips TJA1050 device.

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01D5/26G01D5/36H04L12/28H04M11/00
Inventor 续志军杨艳琴刘晓晶刘长岭
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI