Monitoring device and method for bridge flood scouring

Abstract

The invention discloses a monitoring device and method for bridge flood scouring, and relates to the technical field of bridge engineering, the monitoring device comprises an inflation main body, the inflation main body is connected with an air pump, the surface of the inflation main body is provided with a valve and a pressure sensor, and the pressure sensor is arranged on the surface of the inflation main body and is used for detecting the pressure change of water flow to the device; the water level sensor is arranged on the surface of the inflation body and used for measuring the flood water level, and the displacement sensor is arranged on the surface of the inflation body and used for monitoring scouring displacement of soil around the pier; according to the bridge flood scouring monitoring device and method, the problem that traditional equipment cannot achieve continuous monitoring can be solved, the risk of equipment failure under the extreme water and sand condition is avoided, the device is provided with the wireless data transmission module, data collected by the sensor can be transmitted to a remote monitoring system in real time, and it is ensured that the monitoring efficiency is improved in the complex water flow environment. And data transmission is not interfered.

Description

Technical Field

[0001] The invention relates to the technical field of bridge engineering, and in particular to a device and method for monitoring bridge flood scour. Background Art

[0002] Existing bridge foundation scour monitoring methods include monitoring methods based on force, light, electricity, magnetism, heat, etc. and monitoring methods based on structural dynamic response. The above methods have their own advantages and disadvantages. Among them, the method based on mechanical principles has high reliability and has survival rate under extreme water and sand conditions such as mountain torrents and mudslides, but it cannot achieve continuous monitoring of the river channel scour and siltation process. The monitoring method based on electricity, magnetism, and heat technology can solve the problem of continuous monitoring of scour and siltation, but the survival rate is extremely low under extreme water and sand conditions.

[0003] At present, many fixed monitoring devices (such as sensors, detectors, etc.) need to be installed in difficult-to-reach locations such as bridge piers or underwater facilities. These devices usually need to be installed through underwater operations, which is cumbersome and unsafe. In addition, in harsh environments such as floods, these devices are often damaged by strong water flow and impact, which reduces the stability and reliability of the equipment. Most existing monitoring devices are fixed in position after installation, and it is difficult to adjust according to the changes in flood water levels or water flow scouring. Especially when floods occur, the water level changes rapidly, and the monitoring range of traditional equipment may not effectively cover all key areas, resulting in blind areas for data collection, thereby affecting the comprehensiveness and accuracy of monitoring. Under extreme weather conditions such as floods, the water flow is turbulent and fluctuates violently, and the data transmission and accuracy of traditional monitoring methods are often affected. The equipment may fail due to the impact of high water levels or large water flows, and the data cannot be transmitted in a timely or accurate manner. In addition, the disturbance of water flow may also cause the signal loss or error increase of the monitoring equipment, resulting in difficulties in data collection and a decrease in data quality. Summary of the invention

[0004] The purpose of the present invention is to provide a device and method for monitoring bridge flood scour to solve the problems existing in the prior art.

[0005] To achieve the above object, the present invention provides the following technical solution: a device for monitoring bridge flood scour, comprising:

[0006] An inflatable body, the inflatable body is connected to an air pump and a valve is arranged on the surface of the inflatable body;

[0007] A pressure sensor, which is arranged on the surface of the inflatable body and is used to detect the pressure change of the water flow on the device;

[0008] A water level sensor, which is arranged on the surface of the inflatable body and is used to measure the flood water level;

[0009] The displacement sensor is arranged on the surface of the inflatable body to monitor the scouring displacement of the soil around the pier.

[0010] Preferably, a waterproof sealed cabin is installed on the inflatable body.

[0011] Preferably, fixing devices are provided on the top and bottom of the inflatable body.

[0012] Preferably, the fixing means comprises a rope or a steel belt fixed to the inflatable body.

[0013] Preferably, the air pump is an electric air pump, which can automatically adjust the air pressure in the inflatable body according to the detected water flow pressure.

[0014] Preferably, the water level sensor is an ultrasonic water level sensor, which can measure the flood water level with high precision.

[0015] Preferably, the displacement sensor is a laser displacement sensor or an inductive displacement sensor, which is used to monitor the scour displacement of soil around the bridge pier with high precision.

[0016] Preferably, the waterproof sealed cabin adopts a double-layer structure, with the inner layer being a corrosion-resistant material and the outer layer being a waterproof sealing layer.

[0017] A method for monitoring bridge flood scour, using the above-mentioned device for monitoring bridge flood scour, the method comprising:

[0018] S1. Inflate the main body through an air pump to make it float and stably fix it near the bridge pier;

[0019] S2, using a pressure sensor to detect in real time the pressure change of the water flow on the inflatable body;

[0020] S3, measuring the flood water level using a water level sensor;

[0021] S4. Use displacement sensors to monitor the scour displacement of soil around the bridge piers;

[0022] S5. Based on the sensor data obtained in steps S2, S3 and S4, the impact of flood scouring on the bridge piers is evaluated in real time, and a monitoring report is generated.

[0023] It can be seen from the above technical solution that the present invention has the following beneficial effects:

[0024] The device and method for monitoring bridge flood scour can float when a flood occurs and be stably fixed near the bridge piers by inflating with an air pump. Compared with the traditional fixed installation method, this design enables the monitoring device to flexibly adjust its position according to the changes in water level and water flow, expands the monitoring range, ensures the full coverage monitoring effect, and avoids the situation where the traditional monitoring device cannot adapt to changes due to the fixed position. The pressure sensor, displacement sensor and water level sensor equipped in the device can monitor the pressure changes of the water flow, the flood water level and the scour displacement of the soil around the bridge piers in real time, ensuring comprehensive monitoring of the bridge foundation. In addition, the high-precision design of sensors (such as ultrasonic water level sensors, laser displacement sensors, etc.) significantly improves the accuracy and reliability of monitoring data, reduces signal loss and data errors caused by water flow interference, and the waterproof sealed cabin set on the surface of the inflatable body adopts a double-layer structure. The inner layer is corrosion-resistant material and the outer layer is a waterproof sealing layer, which can effectively protect the sensors and electronic components inside the device from water erosion and corrosion, and extend the service life of the device, especially in extreme water and sand conditions. It has strong impact resistance. The top and bottom of the device are provided with fixing devices, including ropes or steel belts and other fixing methods, which can adjust the device according to changes in different water flow environments, ensure the stability of the monitoring equipment, and avoid drift or damage of the equipment under extreme water flow erosion. It can continue to monitor under extreme weather conditions such as floods, and the equipment itself has a high survival rate. Compared with traditional mechanical monitoring methods and electrical, magnetic and thermal monitoring methods, the monitoring device of the present invention can solve the problem that traditional equipment cannot achieve continuous monitoring, and avoid the risk of equipment failure under extreme water and sand conditions. The device is equipped with a wireless data transmission module, which can transmit the data collected by the sensor to the remote monitoring system in real time, ensuring that data transmission is not interfered with in complex water flow environments, and the real-time and accuracy of the monitoring data are effectively guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 It is a schematic diagram of the arrangement of the present invention;

[0027] Figure 3 The figure is a flow chart of the method of the present invention.

[0028] In the figure: 1. Inflatable body; 2. Valve; 3. Pressure sensor; 4. Water level sensor; 5. Displacement sensor; 6. Waterproof sealed cabin; 7. Fixing device. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] like Figure 1 and Figure 2 As shown, a device for monitoring bridge flood scour, the device comprises: an inflatable body 1, which is connected to an air pump and has a valve 2 on the surface; a pressure sensor 3, which is arranged on the surface of the inflatable body 1, for detecting the pressure change of the water flow on the device; a water level sensor 4, which is arranged on the surface of the inflatable body 1, for measuring the flood water level; and a displacement sensor 5, which is arranged on the surface of the inflatable body 1, for monitoring the scour displacement of the soil around the bridge pier. The device floats on the water surface through the inflatable body 1, and adjusts the floating height according to the changes in the flood water level and the water flow pressure to maintain stability. The pressure sensor 3 detects the pressure change of the water flow on the inflatable body and monitors the water flow intensity in real time; the water level sensor 4 measures the flood water level and obtains high-precision data through the ultrasonic principle; the displacement sensor 5 monitors the scour displacement of the soil around the bridge pier to ensure that the slight changes of the soil can be accurately captured. The present invention can realize real-time and accurate monitoring of bridge flood scour, and can timely evaluate the scour of the flood on the bridge pier and the surrounding soil under the support of multiple data of water flow pressure, water level change and soil displacement. The device has high reliability and accuracy, and can effectively improve the safety monitoring capability of the bridge.

[0031] The device can be applied to different types of bridge monitoring, not only for rivers with large water flow intensity, but also for areas with relatively mild floods. In some cases, the displacement sensor 5 can be replaced with other types of sensors, such as optical fiber sensors or soil resistance sensors, to adapt to different monitoring needs and environments.

[0032] The present invention installs a waterproof sealed cabin 6 on the inflatable body 1. The waterproof sealed cabin adopts a double-layer structure, the inner layer is a corrosion-resistant material, and the outer layer is a waterproof sealing layer to ensure that the internal components of the device are not corroded by water. The waterproof sealed cabin 6 effectively protects the electronic equipment inside the inflatable body through the double-layer structure. The outer waterproof sealing layer prevents water from entering the sealed cabin, while the inner layer of corrosion-resistant materials such as stainless steel or aluminum alloy provides additional protection, so that the equipment is not damaged in a long-term underwater working environment. The double-layer design greatly improves the durability and reliability of the device. After adopting the waterproof sealed cabin, the present invention can work stably for a long time in a complex underwater environment, avoiding equipment failure due to water immersion or corrosion. The waterproof design of the double-layer structure ensures the safety of the equipment and extends the maintenance cycle, adapts to harsh environments, and improves the service life and monitoring efficiency of the device.

[0033] In addition to the double-layer waterproof sealed cabin, the waterproof sealed cabin can also be optimized with other materials and structures. For example, a high-performance ceramic coating can be used to replace the outer waterproof material, or a special electroplating treatment can be performed on the inner material to further improve the corrosion resistance of the equipment.

[0034] The top and bottom of the inflatable body 1 in the present invention are provided with fixing devices 7 for fixing the inflatable body near the bridge pier to ensure that the monitoring device remains stable in floods. The fixing device 7 is connected to the inflatable body 1 by a rope or a steel belt to ensure that the inflatable body is not moved by the impact of the water flow during the floating process. Regardless of how the water flow speed or water level changes, the fixing device can maintain the stable position of the inflatable body, thereby ensuring the accuracy and stability of the sensor data. The fixing device can effectively prevent the inflatable body from drifting or becoming unstable in the flood, ensuring that the monitoring device always remains in the effective monitoring area around the bridge pier. In this way, the device can operate reliably under different water levels and water flow conditions, thereby improving the accuracy of the monitoring data.

[0035] The fixing device 7 can be adjusted according to the specific conditions of different bridges. For example, in areas with slow water flow, a lighter fixing device such as a nylon rope can be used, while in areas with fast water flow, a stronger steel belt or chain can be used for fixing. At the same time, the design of the fixing device can be optimized according to the use environment, and an automatic adjustment device can be used to adapt to different water level changes.

[0036] The fixing device 7 includes a rope or steel belt fixed to the inflatable body 1 to ensure the stability of the inflatable body in floods. The fixing device forms a stable connection by fixing one end of the rope or steel belt to the top and bottom of the inflatable body and the other end to the pier or shore. The rope or steel belt can be appropriately adjusted in tension according to the strength of the water flow to ensure that the inflatable body always remains in the specified position to prevent drifting or tilting. The fixing device 7 can adapt to water flows of different strengths and provide flexible stability adjustment, so that the inflatable body can remain stable regardless of whether the water flow is turbulent or slow, ensuring the reliability of the monitoring data.

[0037] In addition to ropes or steel belts, the fixing device can also use other types of connection materials, such as high-strength carbon fiber ropes or electric lifting devices. For some specific scenarios, the fixing device can also be combined with automated sensors to adjust the fixing state of the inflatable body in real time to meet different monitoring needs.

[0038] The air pump in the bridge flood scour monitoring device of the present invention is an electric air pump. The air pump can automatically adjust the air pressure in the inflatable body 1 according to the change of water flow pressure detected by the pressure sensor 3, so as to ensure the floating stability of the inflatable body. When the pressure sensor 3 detects the change of water flow pressure, the electric air pump automatically adjusts the air pressure in the inflatable body 1 according to the preset algorithm. The operation of the air pump can be to continuously or periodically adjust the gas inlet and outlet to cope with the fluctuation of water flow pressure, so as to ensure that the inflatable body can float stably and adaptively adjust its buoyancy according to the intensity of water flow. The combination of the electric air pump and the pressure sensor enables the inflatable body to automatically adjust according to the change of water flow under flood conditions, avoiding manual operation or excessive reliance on manual control. This automatic adjustment function improves the response speed of the device and the real-time monitoring, ensuring that the device can maintain stable operation under variable water flow conditions.

[0039] The device can also use other types of air pumps, such as a stepper motor driven air pump or a DC motor driven air pump, and different air pump control methods can be selected according to specific application scenarios. For example, a PID control algorithm or a fuzzy control-based method can be used to improve the accuracy and flexibility of air pump regulation.

[0040] The water level sensor 4 of the present invention adopts an ultrasonic water level sensor for high-precision measurement of flood water levels. The sensor can obtain water level data in real time through the principle of ultrasonic emission and reflection, and has high measurement accuracy. The ultrasonic water level sensor calculates the height of the water level according to the propagation time of the signal by emitting ultrasonic signals and receiving reflected signals. Ultrasonic signals can penetrate the water surface and have strong anti-interference ability. Therefore, even in severe weather conditions, the sensor can work stably and measure the flood water level in real time. The ultrasonic water level sensor has the advantages of high precision and non-contact measurement, avoiding the errors or losses of traditional water level measurement methods, and is particularly suitable for accurate water level monitoring in complex environments. Its high precision and reliability can ensure real-time feedback of water level data during floods and ensure the effectiveness of bridge safety monitoring.

[0041] In addition to ultrasonic water level sensors, other types of non-contact water level sensors can also be used, such as laser water level sensors or capacitive water level sensors. In special monitoring environments, different sensor technologies can be selected according to needs to improve the adaptability and accuracy of monitoring.

[0042] The displacement sensor 5 uses a laser displacement sensor or an inductive displacement sensor, which is mainly used to monitor the scouring displacement of the soil around the bridge pier with high precision and accurately capture the slight changes in the soil displacement. The laser displacement sensor calculates the displacement of the soil according to the reflection time by emitting a laser beam and receiving the signal reflected back. The inductive displacement sensor senses the displacement by the change of inductance. Both can measure the displacement of the soil with high precision and monitor the scouring of the soil around the bridge pier through real-time data feedback. The laser displacement sensor and the inductive displacement sensor have high measurement accuracy and can monitor the soil displacement changes at the millimeter level, providing accurate data for evaluating the impact of flood scouring on the bridge pier foundation. This technology can work stably under extreme hydrological conditions to ensure the real-time and accuracy of flood scouring monitoring. In addition to laser displacement sensors and inductive displacement sensors, other types of displacement sensors, such as optical fiber displacement sensors or resistive displacement sensors, can also be used. The appropriate sensor can be selected according to actual needs to adapt to different soil qualities, environments and monitoring accuracy requirements.

[0043] The waterproof sealed cabin 6 of the present invention adopts a double-layer structure, with the inner layer being a corrosion-resistant material and the outer layer being a waterproof sealing layer. This design is used to prevent moisture from entering the interior of the device and protect sensors and electronic components from water erosion. The waterproof sealed cabin provides comprehensive protection through a double-layer structure. The inner layer uses corrosion-resistant materials such as stainless steel or aluminum alloy, which can effectively resist corrosion in a long-term underwater environment. The outer layer uses a waterproof sealing layer such as rubber or polyurethane material, which can effectively block external water sources and prevent water from entering the sealed cabin, thereby protecting the internal electronic equipment. The double-layer waterproof sealing structure effectively extends the service life of the monitoring equipment and ensures the stability of the equipment in complex environments. Its good waterproof performance ensures the reliability of the sensor in a long-term submerged environment, thereby improving the accuracy of monitoring and the durability of the device.

[0044] In addition to the double-layer structure, the waterproof sealed cabin can also use different waterproof materials and structural designs. For example, the inner layer can use ceramic coating or polymer composite materials, and the outer layer can choose a more suitable waterproof coating according to the use environment to adapt to different environmental requirements.

[0045] like Figure 3 As shown, a method for monitoring bridge flood scour is also provided, using the above-mentioned device for monitoring bridge flood scour, the method comprising:

[0046] S1. Inflate the main body through an air pump to make it float and stably fix it near the bridge pier;

[0047] S2, using a pressure sensor to detect in real time the pressure change of the water flow on the inflatable body;

[0048] S3, measuring the flood water level using a water level sensor;

[0049] S4. Use displacement sensors to monitor the scour displacement of soil around the bridge piers;

[0050] S5. Based on the sensor data obtained in steps S2, S3 and S4, the impact of flood scouring on the bridge piers is evaluated in real time, and a monitoring report is generated.

[0051] The method of the present invention can collect data on water flow, water level and soil displacement around the bridge in real time and accurately, so as to comprehensively evaluate the potential threat of floods to the bridge. Through automated and intelligent monitoring methods, the method can greatly improve monitoring efficiency, reduce human intervention, and improve the accuracy of monitoring. The method can be applied to bridges of different sizes and types, and the sensor type, data processing algorithm and monitoring cycle can be adjusted according to specific needs. For example, for areas with relatively gentle water flow, the monitoring frequency can be reduced, and under complex hydrological conditions, the number and density of sensors can be increased to improve monitoring accuracy.

[0052] Working process: First, the inflatable body 1 is inflated by the air pump 5 to make it float and stably fixed near the bridge pier. The pressure sensor 3 on the surface of the inflatable body monitors the pressure change of the water flow on the inflatable body in real time. The air pump automatically adjusts the air pressure in the inflatable body according to the data fed back by the pressure sensor to ensure the stability of its floating state. At the same time, the water level sensor 4 uses ultrasonic technology to measure the flood water level and transmits the data to the control system for processing. The displacement sensor 5 monitors the scouring displacement of the soil around the pier in real time, and accurately obtains the change information of the soil displacement through laser or inductive sensors. All sensor data are integrated and analyzed by the control system. The system generates a detailed monitoring report based on the real-time monitoring data, and evaluates the scouring effect of the flood on the pier and the surrounding soil, ensuring that the safety status of the bridge can be fed back in time, providing decision support for protective measures.

[0053] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A bridge flood scour monitoring device, characterized in that: include: An inflatable body (1), the inflatable body (1) being connected to an air pump and having a valve (2) arranged on the surface of the inflatable body (1); A pressure sensor (3), which is arranged on the surface of the inflatable body (1) and is used to detect changes in the pressure of the device caused by the water flow; A water level sensor (4), which is arranged on the surface of the inflatable body (1) and is used to measure the flood water level; A displacement sensor (5) is arranged on the surface of the inflatable body (1) to monitor the scouring displacement of the soil around the bridge pier.

2. The device for monitoring bridge flood erosion according to claim 1, characterized in that: A waterproof sealed cabin (6) is installed on the inflatable body (1).

3. The device for monitoring bridge flood scour according to claim 1, characterized in that: The top and bottom of the inflatable body (1) are provided with fixing devices (7).

4. The device for monitoring bridge flood scour according to claim 3, characterized in that: The fixing device (7) comprises a rope or a steel belt fixed to the inflatable body (1).

5. The device for monitoring bridge flood scour according to claim 1, characterized in that: The air pump is an electric air pump, which can automatically adjust the air pressure in the inflatable body according to the detected water flow pressure.

6. The device for monitoring bridge flood scour according to claim 1, characterized in that: The water level sensor (4) is an ultrasonic water level sensor capable of measuring flood water levels with high precision.

7. The device for monitoring bridge flood scour according to claim 1, characterized in that: The displacement sensor (5) is a laser displacement sensor or an inductive displacement sensor, and is used for high-precision monitoring of the scouring displacement of soil around the bridge pier.

8. The device for monitoring bridge flood scour according to claim 1, characterized in that: The waterproof sealed cabin (6) adopts a double-layer structure, the inner layer is made of corrosion-resistant material, and the outer layer is a waterproof sealing layer.

9. A method for monitoring bridge flood scour, using the device for monitoring bridge flood scour according to any one of claims 1 to 8, characterized in that: The method comprises: S1. Inflate the main body through an air pump to make it float and stably fix it near the bridge pier; S2, using a pressure sensor to detect in real time the pressure change of the water flow on the inflatable body; S3, measuring the flood water level using a water level sensor; S4. Use displacement sensors to monitor the scour displacement of soil around the bridge piers; S5. Based on the sensor data obtained in steps S2, S3 and S4, the impact of flood scouring on the bridge piers is evaluated in real time, and a monitoring report is generated.

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