A local scour monitoring system and method for wading engineering based on ultrasonic induction

Abstract

The invention discloses a water-related project local scour monitoring system and method based on ultrasonic sensing. According to the system and method, a stepping motor fixed on the inner wall of a protective sleeve rotates to drive a built-in cylinder connected with the protective sleeve through a concentric bearing to rotate, and multiple ultrasonic probes are fixed in round holes in the lateral wall of the built-in cylinder; based on the connection, a computer remotely controls the stepping motor to rotate to enable the ultrasonic probes to scan the three-dimensional terrain, the rotating angle of the stepping motor and the distance between the surface of each ultrasonic probe and a sand bed surface are transformed into local scour terrain three-dimensional position coordinate point data by establishing a three-dimensional coordinate system, the data are remotely transmitted to the computer, and then automatic real-time monitoring of water-related project local scour is achieved. According to the method, various errors in movable ultrasonic monitoring can be avoided, damage of foreign matters contained in high-speed water flow to the ultrasonic probes in fixed ultrasonic monitoring can be avoided, automatic remote real-time monitoring is achieved, monitoring time is shortened, and monitoring accuracy is improved.

Description

technical field [0001] The invention relates to the technical field of monitoring systems and methods for local scour of wading engineering, in particular to a system and method for monitoring local scour of wading engineering based on ultrasonic induction. Background technique [0002] People pay more and more attention to the health monitoring and safety evaluation of major structural engineering in the field of monitoring, and the disaster prevention and mitigation of water-related engineering has become a research field that emerges as the times require. Due to the special service environment, wading projects are extremely vulnerable to local erosion, and the water damage of wading projects caused by local scouring is sudden, which often causes heavy losses to people's lives and property. Many wading projects in my country lack effective management and maintenance after construction. After long-term local erosion, the health of wading projects is no longer optimistic. Th...

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Problems solved by technology

However, the sounding accuracy of this method is not only affected by the measurement error of tide level and sound velocity profile, but also affected by various factors such as the bottom detection method, instrument installation error, ship attitude measurement error, and time delay error.

Moreover, during the flood period, the water flow near the bridge pier is turbulent, and the mobile ultrasonic monitoring method often has the danger of capsizing, so it cannot effectively monitor the local scour near the wading project

For the fixed ultrasonic monitoring method, because it is required to be able to work during the flood, and the stones, floating objects and other sundries mixed with the high-speed movement of the water in the flood have considerable impact and destructive force, often damage the core part. Ultrasound probes with fragile piezoelectric crystals cause damage, making it difficult to effectively deal with extremely harsh flood environments

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