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Single-code-channel absolute-position encoding method, decoding method and measuring device

A technology of absolute position and coding method, which is applied in the fields of coding and decoding methods and measuring devices, and can solve the problems of error-prone, complex absolute position coding method, etc.

Inactive Publication Date: 2011-06-15
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Application Information

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Problems solved by technology

[0005] In order to solve the shortcomings of the prior art absolute position encoding method which is complicated and error-prone, it is necessary to provide an absolute position encoding method which is easy to manufacture and easy to encode.

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  • Single-code-channel absolute-position encoding method, decoding method and measuring device
  • Single-code-channel absolute-position encoding method, decoding method and measuring device
  • Single-code-channel absolute-position encoding method, decoding method and measuring device

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Embodiment Construction

[0016] Please refer to figure 1 , which is a structural schematic diagram of the grating scale used in the absolute position encoding method of the present invention. The grating scale 1 is provided with a plurality of black and white barcodes arranged in parallel and alternately, wherein the black barcodes represent opaque barcodes, and the white barcodes represent light-transmitting barcodes. The black and white barcodes are arranged in parallel to form a barcode sequence, or called a coding pattern. The black and white barcode sequence on the grating scale 1 is divided into multiple partitions, and each partition includes a partition number M and a position code N. Any one of the partition numbers M includes at least two equal-width black barcodes or two equal-width white barcodes. Any position code N includes at least two coded bits, respectively denoted as N1, N2...Nm, wherein any coded bit Nx (1≤x≤m, m is the number of coded bits) includes a black barcode and a monosp...

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Abstract

The invention relates to a single-code-channel absolute-position encoding method comprising the step of setting an encoding pattern. The encoding pattern comprises a plurality of sections, each section comprises a section number and a position code, each section number comprises at least two identical first encoding bar codes or at least two second encoding bar codes, the encoding bar codes of section numbers of any two adjacent sections are different, any position code comprises at least two encoding bits, and each encoding bit comprises a first encoding bar code and a second encoding bar code. The single-code-channel absolute-position encoding method has the advantage of simple encoding. The invention also provides a decoding method corresponding to the single-code-channel absolute-position encoding method and a single-code-channel absolute-position measuring device adopting the single-code-channel absolute-position encoding method and decoding method.

Description

【Technical field】 [0001] The invention relates to an encoding and decoding method and a measuring device, in particular to a single code track absolute position encoding method, a decoding method and a single code track absolute position measuring device using the encoding method and the decoding method. 【Background technique】 [0002] Most modern displacement measurement systems use grating displacement sensors. Since the scale is designed with a repeating grating structure, the measurement of the displacement value is read out using an incremental method. The number of increments of the location to determine the location value. In order to set the absolute position, there must be a reference mark on the scale. The absolute position of the scale is determined by the reference mark. The reference mark must be locked within a measurement step. Obtain the absolute position or find the last selected position by scanning the reference mark. benchmark. Therefore, after the devi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D5/347
Inventor 吴宏圣郭帮辉曾琪峰乔栋孙强
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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