A method and device for online measurement of ice shape based on multi-camera combined imaging
A technology combining imaging and measurement methods, which is applied in the direction of measuring devices, optical devices, instruments, etc., can solve the problems of low reflectivity of clear ice, low measurement accuracy, area diffusion of laser bands in image acquisition, etc., and achieve high imaging resolution, The result is clear and accurate, and the effect of high measurement accuracy
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0054] An online measurement method of ice shape based on multi-camera combined imaging, such as figure 1 shown, including the following steps:
[0055] S10. Arrange N cameras facing the object to be measured, and set narrow-band filters with different center wavelengths in front of each camera; where N≥2;
[0056] S20. The line laser generator starts scanning from the initial position i of the object to be measured, the line laser generator projects a light plane to the object to be measured, and intersects the surface of the object to be measured to generate a light bar G i ; Among them, i can be any position on the surface of the object to be measured;
[0057] S30. N cameras to shoot light bar G synchronously i , forming a target for the light bar G i N images of reflected light in different wavelength bands;
[0058] S40. Process and fuse the N images to obtain the effective three-dimensional contour of the light strip Gi, which is the ice-shaped curve L i ;
[0059...
Embodiment 2
[0070] This embodiment also relates to an ice shape online measurement method based on multi-camera combined imaging. Different from Embodiment 1, this embodiment marks a plurality of marking points on the surface of the object to be measured, and the marking points are used for accurate registration. For multiple pictures taken by multiple cameras, the registered pictures are first fused, and then the fused light bar is extracted as the center line, and the three-dimensional coordinates of the center line are obtained by solving, so as to obtain the three-dimensional contour map of the ice-shaped section.
[0071] Before step S10, a plurality of marking points 18 are set on the non-icing area 16 on the surface of the object to be tested, such as image 3 shown. In order to have these marker points in all the images captured during the icing process, it is necessary to set the marker points in the non-icing area, and there should be multiple, at least three marker points in or...
Embodiment 3
[0088] This embodiment provides a measurement device for the ice shape online measurement method based on multi-camera combined imaging as in Embodiment 1 and Embodiment 2, such as Figure 5 shown, including an image acquisition system and a data processing system;
[0089] The image acquisition system includes N cameras 14, N narrowband filters 15, a rotating stage 13 and a line laser generator 12; wherein, N≥2; the central wavelengths of the N narrowband filters are different, and N The narrow-band filters are arranged at the front ends of the N cameras; the line laser generators 12 are arranged on the turntable 13; when in use, the N cameras and the line laser generators face the object surface 11 to be measured setting; the data processing system receives images captured by N cameras, and performs data processing according to steps S30-S40 to obtain a complete ice-shaped curve on the object to be measured.
[0090] In this embodiment, N cameras 14 are arranged side by sid...
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More