Synchronous real-time measurement device with sand-containing concentration and muddy water flow velocity vertically distributed

Abstract

The invention relates to a real-time measurement device with sand-containing concentration and muddy water flow velocity vertically distributed in a river model test, and belongs to the field of water resources and hydropower engineering river model tests. The device is formed by a sand-containing concentration real-time measurement system and a muddy water flow velocity real-time measurement system in a coupling integration mode. The sand-containing concentration real-time measurement system comprises a laser device, a lens group, a light guiding fiber, and a high-resolution microspur camera. The muddy water flow velocity real-time measurement system comprises an integrated flow measuring pipe, a siphon pipe, a water filling pipe and a high-resolution micro-distortion camera. The two systems are integrated in a coupling mode, namely the two systems are mounted on the same testing support, and a computer and a synchronizer are used for controlling the two systems to carry out synchronous real-time measurement. The device has the advantages of being high in automation degree, high in precision, strong in adaptability to complex testing conditions and the like, the blank of synchronous real-time measurement equipment with sand-containing concentration and muddy water flow velocity vertically distributed is filled, and the device has important production application and popularization value.

Description

technical field [0001] The invention belongs to the field of river engineering model tests, in particular to a synchronous real-time measuring device for vertical distribution of sediment concentration and muddy water velocity. Background technique [0002] During the planning and construction of important water conservancy and hydropower projects, river engineering model tests are required. The muddy water flow rate and sediment concentration during the test are important parameters that need to be measured. The velocity of muddy water and the concentration of sediment are closely related to each other. On the vertical line along the water depth, the velocity of velocity of muddy water and the concentration of sediment are different at each point. The current measurement methods are all to measure the sediment concentration or the muddy water velocity separately, and there is no mature equipment that can directly and synchronously measure the vertical distribution of the se...

AI Technical Summary

Problems solved by technology

Existing methods for real-time measurement of sand concentration are all single-point measurement methods, such as ultrasonic Doppler method and infrared sand measurement method are single-point measurement methods, both of which cannot obtain the vertical distribution of sand concentration at the same time; the differential pressure sensor method Only the average sediment concentration in the entire water body above the measuring point can be obtained

For the measurement of flow velocity in muddy water, most of the existing methods (such as propeller current meter, laser current meter, particle image velocimeter, etc.) are difficult to apply in muddy water with high sand concentration. It is suitable for the measurement of flow velocity in muddy water, but there is a 4-5cm blind area from the probe to the measurement area, which is equivalent to the full water depth under most test conditions, and it is difficult to apply it to the flow of river engineering model tests

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