Multifunctional measuring frame suitable for indoor water tank test and flow measuring method

Abstract

The invention discloses a multifunctional measuring frame suitable for an indoor water tank test and a flow measuring method. The frame for fixing the PIV measurement system is provided, the high-speed camera and the laser can be fixed on the frame, three-direction adjustment of the high-speed camera and the laser can be achieved, and flow velocity measurement of any section and any position of an indoor test water tank can be achieved by using the measurement frame to carry the PIV measurement system. According to test water tanks with different widths and heights, the height of the platform on the measuring frame and the position of the laser corner bottom plate on the auxiliary frame can be adjusted, so that each device of the PIV measuring system can be fixed at a position meeting the precision requirement, and the measuring frame is simple in structure, convenient to assemble and disassemble and capable of being flexibly used for an indoor water tank test; the high-speed camera and the laser have a three-direction adjusting function, so that the PIV measurement accuracy and the arrangement efficiency are improved; the laser corner device extension frame provides a wide-range adjustment space for the laser corner 45-degree mirror.

Description

technical field [0001] The invention relates to the field of a multifunctional measuring frame and a flow measuring method for an indoor water tank test, in particular to a multifunctional measuring frame and a flow measuring method suitable for an indoor water tank test. Background technique [0002] For the measurement of the flow velocity in the indoor test tank, the currently commonly used equipment is: propeller flowmeter, acoustic Doppler Velocimetry (AcousticDopplerVelocimetry, ADV) and particle imaging velocimetry (ParticleImagingVelocimetry, PIV), but the above-mentioned measurement equipment has some shortcomings , the propeller-type current meter and ADV need to be inserted into the water flow, which will disturb the test water flow and affect the accuracy of flow measurement, and it is difficult to measure the flow velocity in the area near the side wall and the bottom of the tank. PIV uses laser light to illuminate the water body Medium particles, take pictures ...

AI Technical Summary

Problems solved by technology

[0002] For the measurement of the flow velocity in the indoor test tank, the currently commonly used equipment is: propeller flowmeter, acoustic Doppler Velocimetry (AcousticDopplerVelocimetry, ADV) and particle imaging velocimetry (ParticleImagingVelocimetry, PIV), but the above-mentioned measurement equipment has some shortcomings , the propeller-type current meter and ADV need to be inserted into the water flow, which will disturb the test water flow and affect the accuracy of flow measurement, and it is difficult to measure the flow velocity in the area near the side wall and the bottom of the tank. PIV uses laser light to illuminate the water body Medium particles, take pictures to calculate the flow field, therefore, it will not disturb the water flow, and can realize the flow velocity measurement in a large area. It is the main popular measurement technology at present, but the PIV measurement system is complex, there are many measurement equipment, and the installation accuracy of the measurement equipment is high. , during the measurement, the workload of determining the installation position of the equipment and installation and debugging is relatively large. This contradiction is extremely prominent when the mobile measurement is performed on multiple sections. It is very difficult to install, fix and debug the equipment. There is an urgent need for a PIV measuring stand with flexible structure, adaptable to different sizes of tanks and quick adjustment of measuring equipment. For this reason, we have designed a multi-functional rack suitable for indoor tank tests. Measuring frame and flow measuring method

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