Water tank three-dimensional topographic measurement device based on camera image processing technology

Abstract

The invention discloses a water tank three-dimensional topographic measurement device based on a camera image processing technology and a measurement method based on the device. The device at least comprises two sets of photographing devices and two laser emission devices, and a uniform-speed movement device of the laser emission devices. The method comprises the following steps of: photographing a water tank sediment bed surface picture by the photographing device through a wireless remote control manner; then copying the photographed picture or a recorded video into a computer; and calculating by utilizing image processing software and a calculation procedure to obtain a three-dimensional bed surface topography. The water tank three-dimensional topographic measurement device is economical and practical, and the obtained three-dimensional topography has high reliability and precision; furthermore, the measurement of a bed surface two-dimensional topography in a video mode is changed along time; the topography is measured in a non-contact manner and the movement of water flow and sediment is not interfered; and the water tank three-dimensional topographic measurement device can also be used for measuring a river bed topography with middle sediment concentration and low sediment concentration, and an experiment does not need to be paused.

Description

technical field [0001] The invention relates to the technical field of water tank three-dimensional terrain measurement for environmental sediment experiments in hydraulic engineering, environmental engineering and marine engineering laboratories. Background technique [0002] In the experimental research of mass transport, river bed evolution, coastal sediment transport, debris flow movement, etc., it is necessary to accurately measure the underwater three-dimensional topographical changes in the experimental tank. At present, there are many methods for measuring the three-dimensional terrain changes in the tank, such as single-point probe method, photoelectric reflection, impedance topography, tracking topography, ultrasonic topography, laser scanner, etc. [0003] The single-point stylus measures the bed surface elevation through the reading of the stylus scale. The method is simple and easy to operate, but it is inefficient, labor-intensive, not real-time, and it is diff...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a simple, reliable and fast three-dimensional terrain measurement device using camera and laser technology to solve the problems of low efficiency, high cost, low precision and low reliability of automatic measurement of three-dimensional topography of experimental water tanks.

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