Method for encoding absolute position

A coding method and technology of absolute position, applied in the direction of measuring device, converting sensor output, instrument, etc., can solve the problems of limited application scope, large number of markings, and high manufacturing cost, and achieve the effect of simple structure, reduced cost and easy manufacturing.

Inactive Publication Date: 2005-03-23
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

This multi-code channel encoding method uses a large number of marks, and the manufacturing cost is high. When the starting point of the encoder coordinates is inconsistent with the starting point of the actual application coordinates, it is inconvenient to read, so the scope of application is limited.

Method used

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  • Method for encoding absolute position
  • Method for encoding absolute position
  • Method for encoding absolute position

Examples

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Embodiment Construction

[0014] A pair matching of 11 marked code tracks and 4 reading devices is used as one of the embodiments for further illustration. The selected reading device arrangement method is that four reading devices are closely adjacent to each other, and the first reading device from the left is called the first reading position. There are 11 different marks 0 and 1 on the code track extending along the path, and the arrangement is 00001010011. When the first reading bit is aligned with the first mark from the left of the code track, use a double underline to indicate the first reading bit, and use a single underline to indicate other Reading position, the distribution is The mark value read by the 4 reading devices is binary address 0000; when the first read bit is aligned with the second mark from the left of the code track, the distribution is as follows The mark value read by each reading device is binary address 0001; when the first read bit is aligned with the third mark from ...

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Abstract

The invention is an absolute position coding method, it only uses a code channel arranged with two-value sign, when uses a reading device to read the two-value sign on the code channel and forms the binary number, when the reading device moves along the code channel, the binary number read on each position has uniqueness, uses the binary number as address, searches the coordinate value of each position in the searching table and outputs, thus the absolute localization can be realized along the sealed curve according to the length or angle. The coordinate starting point of the code and the coordinate value of each position can be changed through changing the number in the searching table.

Description

technical field [0001] The invention relates to a single code track absolute position encoding method, which is used for determining the absolute position of a moving object on its track. Background technique [0002] Currently known absolute positioning encoders along a circle, a straight line or a curve all adopt a multi-code track encoding method, that is, the length of each code track is the full length of the track to be positioned, and each code track is equipped with a reading device. Each code channel is divided into 2, 4, 8, ..., 2 respectively in order n-1 ,2 n Each position is equipped with a binary mark, such as light transmission or opacity, two different colors, two different materials, protrusions or depressions, south magnetic pole or north magnetic pole, etc., generally use 0 or 1 description. At each position to be positioned, the reading device reads a mark attribute 0 or 1 on each code track, and the n-bit binary number read on n code tracks is the req...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B21/02G01D5/347
Inventor 朱衡君邱成
Owner BEIJING JIAOTONG UNIV
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