Pre-embedded bed surface erosion and deposition rate measuring device based on pressure sensing technology

Abstract

The invention discloses a pre-embedded bed surface erosion and deposition rate measuring device based on a pressure sensing technology, and the device comprises a measuring module which is used for measuring the water pressure and the sediment pressure; the pressure sensing module is used for measuring the sum of water pressure and sediment pressure above the inside of the riverbed; the water level measuring module is used for synchronously acquiring water level data; the central processing module is used for obtaining the erosion and deposition rate according to data of the pressure sensing module and the water level measuring module; the data transmission module is used for transmitting the erosion and deposition rate information to a remote terminal; the power supply module is used for supplying power to the pressure sensing module, the water level measuring module, the central processing module and the data transmission module. The method realizes real-time, interference-free and automatic monitoring of the bed load sediment transport rate, has the advantages of high precision, strong adaptability and the like, and is suitable for monitoring the shallow river bed load sediment transport rate.

Description

Technical Field

[0001] This invention belongs to the field of water conservancy engineering monitoring technology, specifically a pre-embedded bed siltation rate measuring device based on pressure sensing technology. Background Technology

[0002] Riverbed scouring and deposition are important phenomena in river evolution, directly affecting the river's flood control capacity, navigation stability, and ecological environment. Especially in sediment-laden rivers such as the Yellow River and the Yangtze River, riverbed scouring and deposition changes are frequent and significant, posing major challenges to flood control, navigation, and ecological protection.

[0003] Currently, riverbed scouring and deposition monitoring mainly relies on methods such as manual measurement, acoustic depth sounders, and remote sensing technology. These methods suffer from problems such as low monitoring frequency, data lag, and significant weather-related influences, making it difficult to achieve high-frequency, continuous, and automated monitoring of the scouring and deposition process.

[0004] Therefore, there is an urgent need for a device that can monitor riverbed erosion and deposition rates in real time, continuously and automatically, in order to improve the accuracy and efficiency of hydrological monitoring and provide a scientific basis for flood control scheduling, waterway maintenance and ecological restoration. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a pre-embedded bed scour and sedimentation rate measuring device based on pressure sensing technology. By pre-embedded pressure sensors, the device can acquire the pressure changes inside the riverbed in real time, separate the water pressure and sediment pressure by combining water level data, and then calculate the scour and sedimentation rate, thus realizing automated and high-precision monitoring of riverbed changes.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] This invention provides a pre-embedded bed surface siltation rate measuring device based on pressure sensing technology, comprising:

[0008] The measurement module includes a pressure sensing module and a water level measurement module, which are used to measure water pressure and sediment pressure.

[0009] The pressure sensing module is used to measure the sum of the water pressure and sediment pressure inside the riverbed.

[0010] The water level measurement module is used to synchronously acquire water level data;

[0011] The central processing module is used to separate the changes in water pressure and sediment pressure based on the data from the pressure sensing module and the water level measurement module, calculate the changes in sediment weight, and convert them into scour and sedimentation thickness. The scour and sedimentation rate can be obtained from the change process of scour and sedimentation thickness over time.

[0012] The data transmission module is used to transmit siltation rate information to a remote terminal;

[0013] The power supply module is used to supply power to the pressure sensing module, water level measurement module, central processing module, and data transmission module.

[0014] The pressure sensing module includes at least one sheet-like pressure sensor pre-embedded inside the riverbed. The sheet-like pressure sensor is arranged horizontally and is used to sense the sum of the water pressure and sediment pressure above.

[0015] The central processing module includes:

[0016] The parameter storage unit is used to store parameters such as monitoring frequency, pressure sensor deployment density, and water level measurement frequency.

[0017] The pressure data storage and numbering unit is used to store the pressure data measured by the pressure sensor and number it in chronological order.

[0018] The water level data storage unit is used to store the water level data measured by the water level measurement module.

[0019] The pressure separation unit is used to separate the changes in water pressure and sediment pressure based on water level data.

[0020] The scouring and sedimentation rate calculation unit is used to calculate the change in sediment weight based on the change in sediment pressure and convert it into the scouring and sedimentation rate.

[0021] The control unit is used to control the operation of each component of the central processing module;

[0022] The temporary storage section is used to temporarily store the collected or calculated data.

[0023] The data transmission module includes a wired local area network, a wireless communication module, or an Internet of Things (IoT) communication module, used to transmit bedload sediment transport rate data to a remote terminal in real time.

[0024] The power supply module includes a solar power generation device and a battery, which provides a continuous and stable power supply for the entire device.

[0025] The pressure sensor is a resistance strain gauge pressure sensor, which has the characteristics of high sensitivity and strong anti-interference ability.

[0026] The water level measurement module uses an ultrasonic water level gauge or a pressure water level gauge, which has high precision and stability.

[0027] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0028] 1. Achieve automated and real-time monitoring of scour and sedimentation. This invention, through the pre-embedded pressure sensors and water level gauges, enables continuous and automated monitoring of the riverbed scour and sedimentation process, greatly improving monitoring efficiency.

[0029] 2. High measurement accuracy and strong anti-interference capability. This invention uses a pressure sensor to directly measure the pressure changes inside the riverbed, and combined with a water level data separation algorithm, effectively reduces the impact of environmental interference on the measurement results. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the overall structure of the device of the present invention;

[0032] Figure 2 This is a schematic diagram of the process for calculating the siltation rate using the device of the present invention;

[0033] Figure 3 This is a schematic diagram of the site layout for Embodiment 1 of the present invention;

[0034] Figure 4 This is a schematic diagram of the site layout in Embodiment 2 of the present invention;

[0035] The components include: 1. Measurement module; 101. Pressure sensor; 102. Water level gauge; 2. Central processing module; 3. Data transmission module; 4. Power supply module; 401. Solar panel; 402. Battery; 403. External power cord; 5. Water surface; 6. Mud and sand surface; 7. Pressure data transmission line; 8. Water tank sidewall; 9. Power socket. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] like Figures 1 to 4 As shown, this embodiment of the invention provides a pre-embedded bed surface siltation rate measuring device based on pressure sensing technology, comprising:

[0038] Measurement module 1 includes a pressure sensing module 101 and a water level measurement module 102, used for measuring water pressure and sediment pressure.

[0039] The pressure sensing module 101 is used to measure the sum of the water pressure and sediment pressure inside the riverbed.

[0040] Water level measurement module 102 is used to synchronously acquire water level data;

[0041] Central processing module 2 is used to separate the changes in water pressure and sediment pressure based on the data from the pressure sensing module and the water level measurement module, calculate the changes in sediment weight, and convert them into scouring and silting rate.

[0042] Data transmission module 3 is used to transmit siltation rate information to a remote terminal;

[0043] The power supply module 4 is used to supply power to the pressure sensing module 101, the water level measurement module 102, the central processing module 2, and the data transmission module 3.

[0044] The pressure sensing module 101 includes at least one sheet-like pressure sensor pre-embedded inside the riverbed. The sheet-like pressure sensor is arranged horizontally and is used to sense the sum of the water pressure and the sediment pressure above.

[0045] The central processing module 2 includes:

[0046] The parameter storage unit is used to store parameters such as monitoring frequency, pressure sensor deployment density, and water level measurement frequency.

[0047] The pressure data storage and numbering unit is used to store the pressure data measured by the pressure sensor and number it in chronological order.

[0048] The water level data storage unit is used to store the water level data measured by the water level measurement module.

[0049] The pressure separation unit is used to separate the changes in water pressure and sediment pressure based on water level data.

[0050] The scouring and sedimentation rate calculation unit is used to calculate the change in sediment weight based on the change in sediment pressure and convert it into the scouring and sedimentation rate.

[0051] The control unit is used to control the operation of each component of the central processing module;

[0052] The temporary storage section is used to temporarily store the collected or calculated data.

[0053] The data transmission module 3 includes a wired local area network, a wireless communication module, or an Internet of Things communication module, used to transmit siltation rate data to a remote terminal in real time.

[0054] The power supply module 4 includes a solar power generation device 401 and a storage battery 402, which are used to provide a continuous and stable power supply for the entire device.

[0055] The use and working principle of the device of the present invention are as follows:

[0056] At the monitoring site, the pressure sensor is first horizontally pre-buried at a certain depth inside the riverbed, with its starting end flush with the riverbed surface. Then, the power supply module is activated to power the entire monitoring device. The device then begins operation.

[0057] When erosion and sedimentation occur, the accumulation or erosion of sediment on the riverbed surface causes changes in the sediment velocity above the pressure sensor, thereby affecting the pressure value sensed by the sensor. Simultaneously, the water level measurement module acquires water level data.

[0058] The central processing module separates water pressure changes from water level data, then obtains sediment pressure changes, calculates sediment weight changes, and finally converts them into scouring and silting rates. The results are then transmitted to a remote terminal via the data transmission module.

[0059] The calculation of scouring and silting rates is based on the following physical relationships:

[0060] Total pressure measured by pressure sensor water pressure With sediment pressure The sum of .

[0061] The water level measurement module synchronously acquires water level data. Calculate water pressure based on water level data = ,in The density of water, This is the acceleration due to gravity.

[0062] Sediment pressure Changes in sediment weight = , where A is the area of ​​the sensor subjected to force.

[0063] siltation thickness ,in The density of the sediment. To measure the length of time.

[0064] Through the above calculation process, the central processing module can calculate the siltation thickness in real time and transmit the results to the remote terminal.

[0065] This invention has the advantages of automation, high precision, and strong adaptability, and can be widely used in monitoring bed scouring and silting of water bodies such as test flumes, rivers, and lakes.

[0066] Example 1:

[0067] In areas with relatively stable riverbeds, pressure sensors are pre-installed and combined with water level gauges for scouring and sedimentation monitoring. The specific deployment method is as follows:

[0068] The pressure sensor is horizontally embedded 0.2 meters below the surface of the riverbed sediment, and the sensor is covered with a mixture of sediment and water.

[0069] The water level gauge is installed on the riverbank or bridge near the pressure sensor, above the water surface 5, to synchronously acquire water level data.

[0070] The central processing module collects pressure and water level data at a set monitoring frequency (e.g., once every 10 minutes), calculates the changes in sediment pressure using a pressure separation algorithm, and converts it into sediment thickness.

[0071] The equipment is powered by solar energy.

[0072] The siltation thickness data is transmitted to a remote terminal via a wired local area network or wireless communication module for monitoring personnel to view and analyze in real time.

[0073] Example 2:

[0074] In the experimental water tank, a single pressure sensor on the bed surface, combined with a water level gauge, is used for monitoring sludge and sedimentation. The specific arrangement is as follows:

[0075] The pressure sensor is horizontally embedded 6 cm below the surface of the sediment in the water tank. The scour thickness is estimated based on the water flow conditions and the bed sand gradation to ensure that the embedment depth is greater than the scour thickness.

[0076] The water level gauge is installed on the side wall 8 of the water tank near the pressure sensor, above the water surface 5, to synchronously acquire water level data.

[0077] The central processing module collects pressure and water level data according to the set test monitoring frequency (e.g., once every minute), calculates the change in sediment pressure through the pressure separation algorithm, and converts it into the thickness of scouring and silting.

[0078] The equipment is powered by an external power cord 403 connected to a power socket 9.

[0079] The siltation thickness data is transmitted to a remote terminal via a wired local area network or wireless communication module for monitoring personnel to view and analyze in real time.

[0080] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pre-embedded bed siltation rate measuring device based on pressure sensing technology, characterized in that: include: The measurement module includes a pressure sensing module and a water level measurement module, which are used to measure water pressure and sediment pressure. The pressure sensing module is used to measure the sum of the water pressure and sediment pressure inside the riverbed. The water level measurement module is used to synchronously acquire water level data; The central processing module is used to separate the changes in water pressure and sediment pressure based on the data from the pressure sensing module and the water level measurement module, calculate the changes in sediment weight, and convert them into scour and sedimentation thickness. The scour and sedimentation rate can be obtained from the change process of scour and sedimentation thickness over time. The data transmission module is used to transmit siltation rate information to a remote terminal; The power supply module is used to supply power to the pressure sensing module, water level measurement module, central processing module, and data transmission module.

2. The embedded bed siltation rate measuring device based on pressure sensing technology according to claim 1, characterized in that: The pressure sensing module includes at least one sheet-like pressure sensor pre-embedded inside the riverbed. The sheet-like pressure sensor is arranged horizontally and is used to sense the sum of the water pressure and sediment pressure above.

3. The embedded bed siltation rate measuring device based on pressure sensing technology according to claim 1, characterized in that: The central processing module includes: The parameter storage unit is used to store parameters such as monitoring frequency, pressure sensor deployment density, and water level measurement frequency. The pressure data storage and numbering unit is used to store the pressure data measured by the pressure sensor and number it in chronological order. The water level data storage unit is used to store the water level data measured by the water level measurement module. The pressure separation unit is used to separate the changes in water pressure and sediment pressure based on water level data. The scouring and sedimentation rate calculation unit is used to calculate the change in sediment weight based on the change in sediment pressure and convert it into the scouring and sedimentation rate. The control unit is used to control the operation of each component of the central processing module; The temporary storage section is used to temporarily store the collected or calculated data.

4. The embedded bed siltation rate measuring device based on pressure sensing technology according to claim 1, characterized in that: The data transmission module includes a wired local area network, a wireless communication module, or an Internet of Things (IoT) communication module, used to transmit bedload sediment transport rate data to a remote terminal in real time.

5. The embedded bed siltation rate measuring device based on pressure sensing technology according to claim 1, characterized in that: The power supply module includes a solar power generation device and a battery, which provides a continuous and stable power supply for the entire device.

6. The embedded bed siltation rate measuring device based on pressure sensing technology according to claim 1, characterized in that: The pressure sensor is a resistance strain gauge pressure sensor, which has the characteristics of high sensitivity and strong anti-interference ability.

7. The embedded bed siltation rate measuring device based on pressure sensing technology according to claim 1, characterized in that: The water level measurement module uses an ultrasonic water level gauge or a pressure water level gauge, which has high precision and stability.

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