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A method for calibrating the center of rotation of an underwater nuclear fuel assembly detection device

A technology of nuclear fuel assembly and detection device, applied in the field of visual measurement, can solve problems such as inapplicability, and achieve the effect of convenient detection

Active Publication Date: 2021-07-09
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The underwater nuclear fuel assembly detection device completes the scanning by driving the camera and the laser to rotate, so the traditional calibration is not applicable

Method used

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  • A method for calibrating the center of rotation of an underwater nuclear fuel assembly detection device
  • A method for calibrating the center of rotation of an underwater nuclear fuel assembly detection device
  • A method for calibrating the center of rotation of an underwater nuclear fuel assembly detection device

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Embodiment Construction

[0036] Below in conjunction with specific embodiment, further illustrate the present invention. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the teachings of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

[0037] Step 1. Vertically project the line laser in the underwater nuclear fuel assembly detection device to the position near the edge of the stereo calibration plate, and perform image acquisition with the camera in the underwater nuclear fuel assembly detection device, wherein:

[0038] The three-dimensional calibration board adopts two three-dimensional checkerboard calibration boards, the checkerboard planes of the two thr...

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Abstract

The invention relates to a method for calibrating the rotation center of an underwater nuclear fuel assembly detection device, which is characterized in that it comprises the following steps: vertically project the line laser in the underwater nuclear fuel assembly detection device to a position close to the edge of a three-dimensional calibration plate, and use water to The camera in the lower nuclear fuel assembly detection device collects images; calculates the laser plane equation according to the collected images; calculates the intersection lines in pairs according to the laser plane equations, and obtains three intersection lines; calculates the axis equation of the rotation center according to the three intersection lines. The center of rotation calibrated by the present invention is the basis of the coordinate conversion of the follow-up device, and the rotation method is used to facilitate the detection in some special environments (not suitable for moving the measured object).

Description

technical field [0001] The invention relates to a method for calibrating the rotation center of an underwater nuclear fuel assembly detection device, belonging to the field of visual measurement. Background technique [0002] As a high-tech, machine vision is a modern measurement technology based on modern optics, integrating optoelectronics, computer image processing, graphics, signal processing and other science and technology. According to the measurement light source, it can be divided into active vision and passive vision. Measurement. Active vision measurement has the characteristics of online non-contact measurement, obvious feature recognition, and high measurement accuracy, and is suitable for object detection in special and harsh environments. [0003] The origin of the laser plane equation calibrated by the traditional laser plane calibration method is a point in space as the reference point. In actual measurement, it is necessary to keep the position of the came...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C11/12
CPCG01C11/12
Inventor 胡俊刘志伟曹万里
Owner DONGHUA UNIV