Ultrasonic focused river sediment concentration online measuring instrument

Abstract

The invention discloses an ultrasonic focused river sediment concentration online measuring instrument. The measuring instrument comprises a rectangular detection water tank, a lifting device and a water host machine, wherein the detection water tank comprises two focused ultrasonic transducers, a protection casing and two openable and closable valves; the focused ultrasonic transducers are symmetrically mounted on a front side and a rear side of the detection water tank in a horizontal direction; the protection casing is fixed on two surfaces and an upper side, which are equipped with ultrasonic probes, by screws; both sides of the openable and closable valves are clamped in vertical grooves in side edges of a left side and a right side of the detection water tank; when the openable and closable valves are opened, a flow pipeline is formed to perform dynamic measurement; when the openable and closable valves are closed, static measurement can be performed. The ultrasonic focused river sediment concentration online measuring instrument provided by the invention has resolution and sensitivity higher than those of an ordinary planar ultrasonic measuring instrument, and is fixed under water during operation to reduce disturbance of flowing water body; the openable and closable valves are designed, so that the measuring instrument can perform the dynamic measurement and the static measurement on riverine suspended sediments simultaneously.

Description

technical field [0001] The invention relates to attenuation measurement of river suspension liquid by a focused ultrasonic transducer and a dynamic / static sediment concentration ultrasonic measuring device, in particular to an ultrasonic focused online river sediment concentration measuring instrument. Background technique [0002] Accurate measurement of river suspended matter concentration is of great significance to the online accurate detection and monitoring of river sediment parameters, construction of water conservancy and hydropower projects, hydrological observation and forecasting, hydrological measurement and other fields. , the change of the Haikou triangle belt and the healthy development of marine ecology also have an important impact. [0003] Traditional river sediment concentration measurement methods include manual sampling and indirect measurement. Manual sampling methods include drying method and weighing method. Although they have the advantages of high...

AI Technical Summary

Problems solved by technology

Some developed countries have produced ultrasonic measuring instruments such as the OPUS series that can measure in high concentrations, but they are bulky and very expensive

Although there have been many studies on the measurement of river sediment parameters based on the principle of ultrasonic attenuation, due to the complexity and instability of river water flow patterns and the diversity of sediment composition and distribution, it is difficult to accurately measure river sediment. The systematic and complete online measuring instrument of sand content still needs to be developed and perfected

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