Under-ice river flow rate measurement system and method based on ultrasonic waves

Abstract

The invention discloses an under-ice river flow rate measurement system and method based on ultrasonic waves. The system comprises an FPGA main controller, a power supply circuit, an ultrasonic wave emission device, two ultrasonic wave receiving devices, a data collection module and an upper computer, the ultrasonic wave emission device is placed on the ice surface and used for emitting ultrasonicwaves towards the positions under the ice, and the two ultrasonic wave receiving devices are separately placed on the ice surface, located in front of and behind the ultrasonic wave emission device in the water flow direction under the condition that the distances between the ultrasonic wave receiving devices and the ultrasonic wave emission device are the same, and used for receiving ultrasonicwave surface waves generated by the ice surface, ultrasonic wave primary reflected waves penetrating through an ice layer and ultrasonic wave secondary reflected waves penetrating through a water flowlayer; the data collection module is used for collecting an ultrasonic wave reflected signal and uploading the signal to the FPGA main controller, the FPGA main controller is used for transmitting areceived real-time signal to the upper computer, and the upper computer is used for calculating the flow speed of an under-ice river according to the time difference generated through the propagationspeed change of the ultrasonic waves during down-flow and reverse-flow propagation in the under-ice river.

Description

technical field [0001] The patent of the present invention relates to the technical field of water flow velocity measurement, and in particular provides an ultrasonic-based subglacial river flow velocity measurement system and measurement method. Background technique [0002] The hydrological department has to monitor the hydrological information of rivers, rivers and lakes in real time all year round. In the hydrological information, the flow velocity of the water is an important hydrological information. The accurate measurement of the flow velocity is very important for the accuracy of the hydrological information. The current meter is used To measure the flow rate of the instrument, at present, the flow meter on the market Doppler flow meter, hanging paddle flow meter and so on. Current meters are widely used in water conservancy and hydrological stations, research institutes and water affairs bureaus and other professional water conservancy and hydrology research units ...

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Problems solved by technology

[0005] In view of this, the purpose of the patent of the present invention is to provide an ultrasonic-based subglacial river flow velocity measurement system and measurement method to solve the problem that the existing subglacial river flow velocity measurement cannot be completed on the ice surface

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