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Triangle method range error compensation device based on angular measurement

A technology of ranging error and compensation device is applied in the field of trigonometry ranging error compensation device to achieve the effect of improving accuracy

Inactive Publication Date: 2005-06-29
TIANJIN UNIV
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Problems solved by technology

However, when the measurement uncertainty is high, the error factor introduced by the change of the measured object's rotation angle must be compensated.

Method used

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  • Triangle method range error compensation device based on angular measurement

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Embodiment Construction

[0009] The triangulation ranging method is divided into two types: vertical incidence and oblique incidence, and the present invention is aimed at the vertical incidence triangular ranging method. Divide the incident light into two beams, one part is perpendicular to the surface of the object to be measured, and the deflection angle of the reflected light is detected by the critical angle angle measuring device; one beam of light is measured using the vertical incident light triangulation method. Then, subtract the measurement error caused by the change of the inclination angle of the surface of the measured object from the distance measurement result, so that the purpose of measuring both the distance and the angle change can be realized.

[0010] The specific process of ranging error compensation is as follows:

[0011] 1) The active illumination light source is adopted, and after the visible light emitted by the laser 4 controlled by the power stabilization circuit is colli...

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Abstract

This invention discloses a triangulation distance measurement compensation device based on angle measurement, which belongs to error compensation technique of triangulation distance measurement. The device comprises calibration light source, convex of the vertical incidence distance measurement device, reflection lens of the object surface to be measured or object surface and the reflection lens behind the convex and photoelectricity receiver. It is characterized by comprising optics angel measurement device. The said angel measurement device comprises a quarter wavelet, deflection light splitting lens, light splitting lens, two threshold angle prisms and two photoelectricity diodes.

Description

technical field [0001] The invention relates to a triangulation ranging error compensation device based on angle measurement, which belongs to the error compensation technology of triangulation ranging. Background technique [0002] At present, the commonly used micro-displacement measurement methods mainly include laser interferometry, laser triangulation, optical probe method, etc., and triangulation measurement has the advantages of non-contact, simple structure, large measurement distance, anti-interference, small measurement point, and measurement accuracy. High, can be used for real-time online fast measurement and other characteristics, has been widely used in the field of geometric measurement. In this method, the error introduced by the change of the rotation angle of the measured object is usually negligible under the precision requirement. However, when the measurement uncertainty is required to be high, the error factor introduced ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/26G01C3/00G01C3/02
Inventor 刘庆纲李志刚李德春徐美健李一平张超艳
Owner TIANJIN UNIV
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