Unlock instant, AI-driven research and patent intelligence for your innovation.

A high-precision reflective element detection method with a large measurement span

A technology of reflective element and detection method, which is applied to measurement devices, instruments, and optical devices, etc., can solve the problem of difficulty in determining mirror points, and achieve the effect of high-precision three-dimensional shape and surface shape detection.

Active Publication Date: 2022-05-10
SICHUAN UNIV
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the deficiencies in the background technology, the present invention proposes a method based on pinhole coordinates to accurately determine the direction of the reflected light, and iteratively find the coordinates of the mirror point according to the direction of the reflected light. Methods

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A high-precision reflective element detection method with a large measurement span
  • A high-precision reflective element detection method with a large measurement span
  • A high-precision reflective element detection method with a large measurement span

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] The present invention will be described in detail below by examples in conjunction with the accompanying drawings. It is necessary to point out that the following examples are only used for further description of the present invention, and cannot be interpreted as limiting the protection scope of the present invention, and those skilled in the art make some non-essential improvements to the present invention according to the above-mentioned content of the present invention And adjustments still belong to the protection scope of the present invention. In order to make the purpose, technical solution and advantages of the present invention clearer, the embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0015] Please refer to the attached figure 1 , the invention provides a high-precision reflective element detection method with a large measurement span. Its basic components include a display 1 , a refere...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention proposes a large-span and high-precision reflective element detection method for simultaneously measuring height and surface shape, and its basic components include a display, a reference surface, a pinhole camera and a measured element. First, based on the pinhole coordinates, the direction of the reflected light is determined by the high-precision camera light direction calibration method based on the inverse ray tracing angle of view; then, based on the high-precision reflected light direction, iteratively finds the mirror point coordinates, and the output height and surface shape are output when the iteration converges . This method has the advantages of large measurement span, high precision and easy implementation.

Description

technical field [0001] The invention relates to the technical field of Phase Measuring Deflectometry (PMD, Phase Measuring Deflectometry) for detecting reflective elements, in particular to the large-span, high-precision Phase Measuring Deflectometry for simultaneous detection of height and surface shape. Background technique [0002] Phase measurement deflection is a non-contact high-precision reflective element detection method, which has the advantages of relatively low cost, easy implementation, insensitivity to environmental factors such as temperature and vibration, and high dynamic range. In PMD detection, sinusoidal fringes are projected by an LCD display and collected by a pinhole camera after being reflected by the measured surface. The slope calculation of phase measurement deflectometry is essentially a problem of finding the corresponding relationship between the coordinates of the light point of the display, the pinhole and the mirror point. The light point of...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/06G01B11/24G01B11/00
CPCG01B11/0608G01B11/0625G01B11/24G01B11/002
Inventor 李大海王瑞阳张新伟洪铁鑫
Owner SICHUAN UNIV