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Length calibration device for photogrammetric reference ruler and using method thereof

A photogrammetry and calibration device technology, which is applied in the field of geometric quantity measurement, can solve problems such as difficult installation and adjustment, achieve the effect of simple installation and adjustment, eliminate Abbe error, and ensure accuracy

Active Publication Date: 2018-11-23
FOSHAN TIANMU IND MEASUREMENT TECH CO LTD
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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 makes installation and adjustment difficult

Method used

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  • Length calibration device for photogrammetric reference ruler and using method thereof
  • Length calibration device for photogrammetric reference ruler and using method thereof
  • Length calibration device for photogrammetric reference ruler and using method thereof

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specific Embodiment approach

[0027] Specific implementation: see attached figure 1 , 2 , 3, figure 1 , 2 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 way, so it only shows a schematic diagram of the structure and design related to the present invention.

[0028] The calibration device for a photogrammetric reference ruler described in this embodiment includes a laser interferometer 1, a laser interferometer adjustment pan 2, a beam splitter and an interferometric mirror group 3, a mirror group mounting frame 4, a granite long guide rail 5, an air float Support slider 6, first y-z two-degree-of-freedom fine-tuning platform 7, mirror 8, mirror support table 9, second y-z two-degree-of-freedom fine-tuning platform 10, third y-z two-degree-of-freedom fine-tuning platform 11, zoom camera 12, The first reference ruler support base 13 , the second reference ruler support base 14 , and the zoom camera mounting...

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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 measurement, in particular to a photogrammetric reference ruler length calibration device and a use method. Background technique [0002] In industrial photogrammetry, the role of the datum ruler is to provide a length reference. The accuracy of the length of the reference ruler directly affects the accuracy of the measurement results. In order to ensure the quality of the data obtained in engineering applications, the length of the reference ruler must be accurate. In order to ensure that environmental changes have little effect on the length of the reference ruler, the reference ruler is generally made of carbon fiber material or indium steel material. The datum ruler has marking points painted or fixed on the body of the ruler. The ruler length can be defined as the distance between two marking points. Since a reference ruler can be fixed with multiple marking points, it can have multiple d...

Claims

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Application Information

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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
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