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Position measurement device based on two-dimensional pseudo-random code

A pseudo-random coding and measuring device technology, which is applied in the field of position measuring devices based on two-dimensional pseudo-random coding, can solve the problems of unchangeable error code, unusable incremental track, etc.

Active Publication Date: 2011-11-09
TSINGHUA UNIV
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Problems solved by technology

But this method cannot be used for the situation where the incremental rail cannot be installed
At the same time, the use of incremental rails cannot change the error caused by the pseudo-random code corresponding to the measuring head reading multiple position codes, because it is basically caused by the randomness of the pseudo-random code position and the coupling of the measuring head position

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  • Position measurement device based on two-dimensional pseudo-random code
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  • Position measurement device based on two-dimensional pseudo-random code

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Embodiment Construction

[0103] The present invention adopts the measurement coding scale structure based on the two-dimensional pseudo-random coding method, and introduces the position representation and coding method of the measurement dimension coding and the error-tolerant dimension coding. Compared with the traditional position measurement method, it has greater application flexibility and fault tolerance, and has It has the characteristics of good scalability, simple structure and strong anti-interference ability.

[0104] The invention provides a position measuring device based on two-dimensional pseudo-random coding, comprising:

[0105] The measurement coding scale B is composed of several non-magnetic coding elements Ba and two kinds of magnetic coding elements with different diameters and the same material, Bb and Bc, which are interleaved and coaxially connected, and the directly smaller magnetic coding element is called measurement The magnetically permeable encoding element Bb has the sa...

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Abstract

The invention relates to a position measurement device based on a two-dimensional pseudo-random code, which belongs to the technical field of position measurement. The position measurement device is characterized by comprising a measurement coding ruler, a measurement head element, a stimulus signal generating unit, a signal conditioning unit and a position information processing unit, wherein anobject to be measured is connected to the measurement coding ruler; the measurement coding ruler comprises non-magnetic coding elements, measurement magnetic coding elements, and fault-tolerant magnetic coding elements, wherein the non-magnetic coding elements and measurement magnetic coding elements are arranged correspondingly according to a measurement dimensional coding sequence mode and the fault-tolerant magnetic coding elements are inserted among different coding elements; the arrangement sequence of the fault-tolerant magnetic coding elements is in same correspondence to a fault-tolerant dimensional coding sequence; the coding elements are arranged according to the sequence and then are mutually coaxially connected; and the position information processing unit analyzes type information of the corresponding coding elements inside the measurement head element, wherein the type information is transmitted by the signal conditioning unit and is obtained by the sampling of the measurement head element, and the position information of the measured object is obtained after the type information is processed. The invention has the advantages of good extension property, high reliability and simple structure.

Description

technical field [0001] The invention belongs to the technical field of measurement and control, and relates to a position measuring device and an encoding method used for structural arrangement thereof, in particular to a position measuring device based on two-dimensional pseudo-random encoding. Background technique [0002] Measuring the position of an object and its linear travel distance is a technology that has been required in various scientific and technological fields for a long time. Due to the different measurement environment conditions and measurement requirements in each measurement situation, various methods have been developed for measuring the position of an object and the distance it moves linearly. [0003] Known methods for measuring the moving position and linear moving distance of an object mainly include two categories: analog and digital. [0004] Analog position measurement methods include contact and non-contact. There are different implementation m...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B7/02G01D5/12
Inventor 李胜强姜胜耀薄涵亮王文然张亚军
Owner TSINGHUA UNIV
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