Measurement and control system for large-area cross-section flow field measurement based on body light source

Abstract

The invention discloses a measurement and control system for large-area cross-sectional flow field measurement based on a body-type light source, including a test module, a central control module, and a terminal control module; Due to the overlapping of multiple light sources, the entire measurement is adversely affected; the present invention uses the depth of field of the camera, and the specific specific focus image realized by the multi-camera post-processing synthesis to realize the measurement of the flow field of a specific section. Compared with the traditional particle image velocimetry system, in While realizing large-area measurement, the accuracy of measurement is guaranteed; the system is connected with the control system through a synchronizer, which can realize high-speed large-area cross-sectional flow field measurement. The exposure signal setting can realize large-area particle image acquisition, and even use low-speed industrial cameras to measure high-speed fluid motion.

Description

technical field [0001] The invention relates to the technical field of flow field measurement, in particular to a measurement and control system for large-area section flow field measurement based on a body light source. Background technique [0002] For the measurement of fluid, ocean, and water conservancy project cross-section flow fields, the commonly used measurement technology is particle image velocimetry technology, but limited by physical limitations such as image resolution, laser light source power, and spread angle, it is impossible to conduct large-area flow fields. Measurement. In actual marine engineering, hydraulic engineering research and engineering fluid measurement, many large waves, tidal currents, wind wave currents, and slope-changing flumes require high-precision flow field measurement of cross-sectional water bodies with a length of more than 1m. For the above-mentioned large-area cross-sectional flow field measurement, the conventional solution is ...

AI Technical Summary

Problems solved by technology

[0004] 1. Due to the problem of the fan-shaped angle of the light source, there will be overlapping parts at the splicing part of the light source, and the light intensity of the overlapping part is twice that of other parts, and the calculation of the flow field at the joint will be greatly affected;

[0005] 2. The splicing of multiple sets of light sources is also very difficult, which consumes precious experimental time and is easy to introduce errors;

[0006] 3. In addition, the cost of multiple sets of particle image velocimetry systems is very high, and multiple sets of hardware synchronization and post-processing are very time-consuming;

[0007] 4. For high-speed and large-area flow field measurement, the large-scale pulse laser used is large in size, cumbersome to adjust, and expensive;

[0008] 5. In large-scale sea areas relative to large-area smooth measurements, the measurement position of the test device used is very easy to change due to ocean currents, which will lead to inaccurate measurement orientation and even serious measurement distortion

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