Device and method for three-dimensional observation of piping based on piv technology

Abstract

The invention provides a three-dimensional observation piping device and method based on PIV technology, which is characterized in that it includes a transparent filling model box, a water injection tank and a PIV particle image velocity measurement system, and the PIV particle image velocity measurement system includes tracer particles and two observation screen lighting systems 1. Two CCD cameras and a computer acquisition system, and an observation screen lighting system is assembled on the adjacent two sides of the transparent filling model box. In the middle of the top plate of the transparent filling model box is an openable and closable piping outlet. A water pipe leads from the bottom of the water injection tank to connect with the water inlet hole at the bottom of the transparent filling model box. Tracer particles are used to fill the transparent filled model box. Using PIV particle image velocity measurement technology, using its vector diagram technology and observation screen lighting system, it can effectively solve the problem that the PIV laser cannot locate the laser irradiation surface at the piping outlet, and can effectively reflect the vector field of the fluorescent sand piping. The determination method is simple and the determination accuracy is high.

Description

technical field [0001] The invention belongs to the technical field of water conservancy engineering, and relates to a method for detecting and analyzing the quality of dams, in particular to a device and method for three-dimensionally observing piping based on PIV technology. Background technique [0002] my country has been plagued by floods and other disasters for a long time, and the plain areas in the middle and lower reaches of the Yellow River and the Yangtze River have the most frequent and severe floods. After the disaster statistics, among the various disasters of its dams, piping is the most harmful. The economic construction along the Yellow River and the Yangtze River needs to build a safe construction environment that avoids flood hazards. It needs to deal with the seepage field generated by the water-soil interaction in the nonlinear dynamic process generated by piping. The fine-grained soil particles in the seepage process system The complex changes of geomet...

AI Technical Summary

Problems solved by technology

[0005] How to design a three-dimensional observation piping device and method based on PIV technology, aiming at the traditional PIV particle image velocity measurement technology, using its vector diagram technology, using a new light source form to replace its laser light source, effectively solving the problem that the PIV laser cannot locate the laser irradiation surface The piping outlet, and can effectively reflect the vector field of the piping of its fluorescent sand

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