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A photogrammetric standard ruler length calibration device and using method

A photogrammetry and calibration device technology, applied in the field of geometric quantity measurement, can solve problems such as difficult installation and adjustment

Active Publication Date: 2020-05-19
FOSHAN TIANMU IND MEASUREMENT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (2) The line connecting the centers of the two marked points to be tested is required to be parallel to the guide rail and the laser beam of the laser interferometer, which is difficult to install and adjust

Method used

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  • A photogrammetric standard ruler length calibration device and using method
  • A photogrammetric standard ruler length calibration device and using method
  • A photogrammetric standard ruler length calibration device and using method

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specific Embodiment approach

[0025] Specific implementation method: see attached figure 1 , figure 1 It is an assembly drawing of the device of the present invention, and only illustrates the basic structure of the present invention in a schematic manner, so it only shows a schematic diagram of the composition and design related to the present invention.

[0026] A photogrammetric standard ruler length calibration device described in this embodiment includes a laser interferometer 1, a laser interferometer adjustment platform 2, a beam splitter and an interference mirror group 3, a beam splitter and an interference mirror group support table 4, and a granite guide rail 5 , air bearing slider 6, the first y-z two-degree-of-freedom fine-tuning platform 7, mirror 8, mirror support table 9, the second y-z two-degree-of-freedom fine-tuning platform 10, the third y-z two-degree-of-freedom fine-tuning platform 11, zoom Camera 12, first scale support base 13, second scale support base 14, variable magnification ...

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Abstract

The invention discloses a length calibration device for a photogrammetric reference ruler and a using method thereof. The length calibration device effectively eliminates Abbe errors in the y direction of a conventional device, is easier to assemble and adjust, and is suitable for calibration of reference rulers with multiple modes. The length calibration device includes an air float slide block located on a granite long guide rail with a rectangular groove, a laser interferometer located at one end of the rectangular groove of the granite long guide rail, a beam splitter and an interference lens group, a reflector located on the air float slide block, and a zoom camera. On the basis of the length of a to-be-calibrated reference ruler, a reference ruler support is adjusted in position before measurement and is fixed to support the to-be-calibrated reference ruler, and the reference ruler is calibrated by moving the air float slide block to a corresponding mark point. The length calibration device for a photogrammetric reference ruler is applicable to high-precision calibration of the lengths of various reference rulers using circular mark points, thereby effectively ensuring the industrial photogrammetric accuracy.

Description

technical field [0001] The invention relates to the technical field of geometric quantity measurement, in particular to a photogrammetry standard ruler length calibration device and a use method. Background technique [0002] In industrial photogrammetry, the role of the ruler is to provide a length reference. The accuracy of the length of the scale directly affects the accuracy of the measurement results. In order to ensure the quality of data obtained in engineering applications, the length of the scale must be accurate. In order to ensure that environmental changes have little effect on the length of the scale, the scale is generally made of carbon fiber or indium steel. The reference ruler is painted or fixed with marking points on the main body of the ruler. The ruler length can be defined as the distance between two marker points. Since a reference ruler can be fixed with multiple marker points, it can have multiple different ruler lengths. [0003] The calibration ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/02
CPCG01B11/02
Inventor 李维诗夏嫣然于连栋夏豪杰张瑞
Owner FOSHAN TIANMU IND MEASUREMENT TECH CO LTD