Water surface light guide device and flow measurement system suitable for indoor water tank test

Abstract

The invention discloses a water surface light guide device and a flow measurement system suitable for an indoor water tank test, and relates to the field of laser flow measurement, the water surface light guide device comprises a bottom table, the outer surface of the upper end of the bottom table is provided with a test water tank, the outer surface of the upper end of the test water tank is provided with a large frame bottom plate, and the outer surfaces of the two sides of the large frame bottom plate are provided with measurement frames. According to the water surface light guide device suitable for the indoor water tank test and the flow measuring system, the measuring frame is simple in structure and convenient to assemble and disassemble, and can be flexibly used for the indoor water tank test; the high-speed camera and the laser have a three-direction adjusting function, the PIV measurement accuracy and arrangement efficiency are improved, and the measurement frame can slide in an orbit and can be accurately and conveniently moved to a measurement position; the water surface light guide device guides laser below the water surface, the influence of laser refraction caused by water surface fluctuation can be avoided, the size of the measuring frame can be adjusted according to test water tanks with different widths, and the using effect is better than that of a traditional mode.

Description

technical field [0001] The invention relates to the field of laser current measurement, in particular to a water surface light guide device and a current measurement system suitable for indoor water tank tests. Background technique [0002] For the measurement of the flow velocity in the indoor test tank, the commonly used equipment currently includes: propeller-type flowmeter, acoustic Doppler flowmeter and particle imaging velocimeter, but the above-mentioned measuring equipment has some disadvantages, the propeller-type flowmeter and ADV need to be inserted Into the water flow, it 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 to illuminate the particles in the water body, and takes pictures to calculate the flow field. , will not disturb the water flow, and can realize flow velocity measurement in a wide range of areas....

AI Technical Summary

Problems solved by technology

[0002] For the measurement of the flow velocity in the indoor test tank, the commonly used equipment currently includes: propeller-type flowmeter, acoustic Doppler flowmeter and particle imaging velocimeter, but the above-mentioned measuring equipment has some disadvantages, the propeller-type flowmeter and ADV need to be inserted Into the water flow, it 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 to illuminate the particles in the water body, and takes pictures to calculate the flow field. , will not disturb the water flow, and can realize flow velocity measurement in a wide range of areas. It is the main popular measurement technology at present, but the PIV measurement system is complicated, there are many measurement equipment, and the installation accuracy of the measurement equipment is high. When measuring, the installation position of the equipment must be determined and The workload of installation and commissioning is relatively large, and this contradiction is extremely prominent when performing mobile measurements on multiple sections

[0003] When using the PIV measurement system to measure the flow rate of the tank, the laser is usually used to illuminate the water body from the bottom of the glass tank. This laser layout method can avoid the influence caused by the fluctuation of the water surface. However, for the opaque tank test with pebbles and other materials on the bottom of the tank , when the laser enters from the bottom of the glass tank, it will be completely blocked by materials such as pebbles on the bottom of the tank, and it is difficult to enter the water flow area. In view of the problems encountered in the test of the opaque bed surface tank, we propose a suitable indoor tank test. Water surface light guide device and flow measurement system

Images