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Bar gauge by grading coding

A technology of hierarchical coding and bar code, applied in the field of measuring instruments, can solve the problems of many combinations of code elements, high bar code density, and difficulty in bar code recognition, and achieve the effect of low bar code density, enlarged measurement range, and low bar code recognition difficulty.

Inactive Publication Date: 2013-09-18
谢佑坤 +3
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The barcode scales of the existing barcode scales are compiled by the coding method of the first-level barcode counter, which has the defects of many code element combination states (hundreds and thousands) and high barcode density in the codeword, making barcode recognition difficult

Method used

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Embodiment Construction

[0021] The embodiments of the present invention will be further described below in conjunction with the accompanying drawings, but this embodiment is not intended to limit the present invention, and any structure similar to the present invention or equivalent replacement should be included in the protection scope of the present invention.

[0022] Such as figure 1 As shown, a kind of graded coding bar code scale provided by the embodiment of the present invention, the bar code scale is marked with bar code type scale, it is characterized in that:

[0023] The barcode-type scale has a total length of 7680 mm, and is equally divided into 8 code segments arranged in sequence from the beginning to the end, and each code segment is equally divided into 16 code words arranged in sequence from the start to the end, and each code word is equally divided into 3 code elements arranged in sequence from the beginning to the end, the center distance between every two adjacent code elements...

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Abstract

A bar gauge by grading coding relates to the technical field of measuring instrument. According to the invention, the technical problem of high difficulty of present bar gauge identification is solved. Scale of the bar gauge provided by the invention is equally divided into a plurality of code segments. Each code segment is divided into a plurality of code words. Each code word is equally divided into D code element, A code element and B code element. The distances between centers of adjacent code elements are consistent. The D code element has a plurality of code bars, which are centrosymmetrically distributed to form a code segment counter. There is only one code bar at the center of the A code element and the B code element. The A code element and the B code element form a code word counter. The center line of the D code element is the start point of code words as well as the stop point of the front code word. There are a plurality of code bars in the D code element. Code segment counter values in the same code segment are consistent and convenient to identify. The bar gauge provided by the invention is characterized by few combinations of code elements and low bar code density. Wide-range levelling can be realized by using few combinations of code elements. Good conditions are created for long-distance measurement of barcode positioning, and measurement reliability is raised.

Description

technical field [0001] The invention relates to the technology of measuring instruments, in particular to a technology of graded coding barcode scales. Background technique [0002] Optical imaging barcode positioning technology is an optoelectronic automatic measurement method based on barcode recognition technology and machine vision measurement, and is widely used in digital levels. [0003] The digital level is an instrument that uses optical imaging barcode positioning technology to measure the height difference between two points on the ground. It is mainly composed of a telescope, a photoelectric sensor, and a barcode ruler. When the digital level is measuring, on the one hand, the scale barcode is imaged on the telescope differentiation plate for visual observation, and on the other hand, it is imaged on the photoelectric sensor through the telescope's spectroscopic mirror for electronic reading. [0004] The coding method of the barcode scale of the digital level i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C5/00
Inventor 谢佑坤谢佑兴谢思敏谢云峰
Owner 谢佑坤
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