Bar code type levelling staff detection system and detection method

Abstract

The invention relates to a novel bar code type levelling staff detection system and detection method. The system consists of a three-coordinate measurement machine, a plane reflecting mirror and an electronic level, wherein the three-coordinate measurement machine is of a fixed crane span and movement workbench structure; the plane reflecting mirror is fixed on a coordinate measurement machine crane span and forms an angle of 45 degrees with the horizontal guideline of the electronic level; and the brand of the electronic level and the brand of a tested bar code levelling staff are the same. The system is regulated through a center adjustment method, a precise measurement system is formed, the bar code type levelling staff moves, a vertical upright image is formed through the plane reflecting mirror and is read and decoded by the electronic level to obtain a bar code type levelling staff indicating value; the bar code type levelling staff indicating value and a standard displacement value form a two-dimensional data column; and least square fitting is subjected to segmented superposition, and a straight slope serves as the per-meter true-long compensation factor of the tested bar code type levelling staff. The novel bar code type levelling staff detection system has the advantages of convenient implementation way, small land occupation, high measurement accuracy and scientificdata evaluation.

Description

technical field [0001] The invention relates to detection technology in the surveying and mapping industry, in particular to a barcode-type leveling rod detection system and detection method. Background technique [0002] Barcode level ruler, also known as barcode Invar ruler, is a leveling measuring instrument that engraves a one-dimensional barcode on the ruler tape, and conveys length information through the change of the width of the barcode and the vertical arrangement of the barcode. It is used in conjunction with an electronic level. The electronic level decodes a section of the barcode of the barcode leveling staff in a certain way to obtain the position and height information of the staff. , Second-class leveling has been widely used. Therefore, in order to ensure the accuracy of the leveling measurement, the bar code leveling staff and the supporting electronic leveling instrument must be calibrated regularly. [0003] At present, the equipment for detecting barc...

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Problems solved by technology

[0004] The technical problems to be solved by the present invention are: 1. The existing device is based on machine vision to independently detect the width of the bar code ruler bar, does not involve the coded information of the bar code, and is adjacent to a section of the bar code level scale that the electronic level needs to read in actual use The principle of barcode and decoding to determine the position is different; 2. The existing detection device needs to build a set of long guide rails. The horizontal attitude detection guide rail occupies a large area, while the vertical attitude detection guide rail occupies a large space and the construction cost is high

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