Real-time monitoring test device for local scour based on acoustic principle

Abstract

The present application belongs to the technical field of experimental devices, and proposes a real-time monitoring test device for basic local scour based on acoustic principle, which comprises a glass fiber column, a sand surface, an acoustic detector, a rotating mechanical device and a programmed stepping motor. The lower part of the glass fiber column is buried in the sand surface and is perpendicular to it. The acoustic detector is fixed by the C-shaped half-open buckle of the mechanical rotating device. The mechanical device is connected by a sleeve, a bearing, a U-shaped sheet, an I-shaped rod and a bent rod. The rotating angle and speed of the stepping motor control device are controlled. The present application uses acoustic detection principle to monitor the dynamic process of basic local scour in real time, and has high precision, high sensitivity and strong environmental adaptability. Combined with deep learning technology, the present application can realize scour data fusion and rapid prediction, and provides an intelligent solution for bridge foundation scour monitoring, and promotes the intelligent development of infrastructure monitoring technology.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of experimental devices, in particular to a real-time monitoring test device for local scouring based on acoustic principles. BACKGROUND

[0002] The safety and stability of bridge foundations in complex marine environments depend not only on the stress conditions under load, but also on the reduction of pile bearing capacity caused by local scouring. Local scouring can reduce the effective embedded length of the foundation, thereby affecting the stiffness and dynamic characteristics of the bridge, ultimately threatening the service safety of the bridge.

[0003] Currently, scour monitoring is an important means to ensure the safety of bridge foundations, but traditional monitoring methods have many defects: manual inspection is inefficient and unsafe; the equipment has poor adaptability in complex environments and is easily disturbed; real-time monitoring is not possible, and data lag affects early warning and decision-making; some systems are high in cost and complex to maintain, limiting their widespread application.

[0004] Therefore, it is of great significance to develop a real-time monitoring device for local scouring based on acoustic principles. Acoustic monitoring can monitor the interaction between water flow and structural foundation in real time, provide timely warning of scouring problems, and prevent accidents. Compared with traditional methods, acoustic monitoring has high precision, high sensitivity, and less environmental interference, and can adapt to complex water conditions, reduce labor costs and safety risks. Combined with big data and artificial intelligence technology, the acoustic monitoring system can provide intelligent analysis and prediction to support infrastructure maintenance, promote the development of intelligent monitoring, and contribute to sustainable development and ecological protection. SUMMARY

[0005] The purpose of the present application is to provide a real-time monitoring test device for local scouring of foundations based on acoustic principles to solve the problems raised in the background art.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0007] The real-time monitoring test device for local scouring of foundations based on acoustic principles comprises a glass fiber column 2, a sand surface 1, an acoustic detector 3, a mechanical rotating device 4, and a programmed stepping motor 5.

[0008] The lower part of the glass fiber column 2 is buried in the sand surface 1 and perpendicular to the sand surface 1, and the upper part is provided with the mechanical rotating device 4, the acoustic detector 3 is mounted on the mechanical rotating device 4, which can drive the acoustic detector 3 to swing in the inside-out and front-back directions, and the programmed stepping motor 5 is arranged on the mechanical rotating device 4, which is used to control the rotation angle of the mechanical rotating device 4 in the two directions.

[0009] Further, the mechanical rotating device 4 comprises a main circular sleeve 7, a neck sleeve 8, an upper U-shaped piece 10, an upper bearing 11, an I-shaped rod 12, a lower U-shaped piece 13, a lower bearing 14, a bent rod 15 and a C-shaped half-open buckle 16; the main circular sleeve 7 is sleeved and fixed on the upper part of the glass fiber column 2, the neck sleeve 8 is evenly fixed radially on the outer periphery of the main circular sleeve 7, the end of the neck sleeve 8 is fixed with the upper U-shaped piece 10, and the U-shaped section of the upper U-shaped piece 10 is radially parallel to the glass fiber column 2 and the main circular sleeve 7; the inner sides of the upper U-shaped piece 10 are both provided with the upper bearing 11, the two upper bearings 11 are connected with the two lower bearings 14 through the I-shaped rod 12, the two lower bearings 14 are externally provided with the lower U-shaped piece 13, the upper rod and the lower rod of the I-shaped rod 12 are vertically arranged through the middle rod, so that the setting direction of the upper U-shaped piece 10 is perpendicular to the setting direction of the lower U-shaped piece 13, and then the I-shaped rod 12 drives the lower U-shaped piece 13 to realize the swing in the front-back direction relative to the upper U-shaped piece 10, and the lower U-shaped piece 13 realizes the swing in the inner-outer direction relative to the upper U-shaped piece 10 and the I-shaped rod 12. The upper end of the bent rod 15 is fixed to the bottom end of the lower U-shaped piece 13, and the lower end is provided with the C-shaped half-open buckle 16; the acoustic detector 3 is clamped on the C-shaped half-open buckle 16 of the mechanical rotating device 4, and is used for real-time detection of the distance from the probe to the sand surface.

[0010] Further, the programmed stepping motor 5 is inserted into the small hole reserved outside the upper U-shaped piece 10 and the lower U-shaped piece 13, so as to control the turning angle, speed and step number of the mechanical rotating device 4 in two directions.

[0011] Further, the glass fiber column 2 is used for simulating the offshore water surface under the pier foundation, and the depth of the lower part buried in the sand surface 1 is adjusted according to actual requirements.

[0012] Further, the acoustic detector 3 realizes real-time monitoring of the dynamic process of local scouring of the foundation through the acoustic detection principle, and transmits the collected data to the computer in real time for visual processing.

[0013] Compared with the prior art, the beneficial effects of the present application are:

[0014] The present application develops a test scale acoustic depth monitoring device to realize the real-time monitoring technology of the dynamic process of foundation scouring; studies the dynamic characteristics and scouring mechanism of the foundation under complex flow conditions, and finds out the main influencing factors of foundation scouring; and makes a breakthrough in the bridge foundation scouring monitoring technology. The innovation of the present application is:

[0015] 1) developing a test scale acoustic depth monitoring device;

[0016] 2) realizing real-time monitoring of bridge foundation scouring under complex flow conditions. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 The structural schematic diagram of the real-time monitoring test device for basic local scour based on acoustic principle is shown in the figure.

[0018] Fig. 2 The structural schematic diagram of the mechanical rotating device in the real-time monitoring test device for basic local scour based on acoustic principle is shown in the figure.

[0019] In the figure: 1, sand surface; 2, glass fiber column; 3, acoustic detector; 4, mechanical rotating device; 5, programmed stepping motor; 6, long screw; 7, main body ring sleeve; 8, neck sleeve; 9, screw; 10, upper U-shaped piece; 11, upper bearing; 12, I-shaped rod; 13, lower U-shaped piece; 14, lower bearing; 15, bent rod; 16, C-shaped half-open buckle. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0021] Embodiment: please refer to Figs. 1-2The application discloses a real-time monitoring test device for local scouring of foundation based on acoustic principle, which comprises a glass fiber column 2, a sand surface 1, an acoustic detector 3, a mechanical rotating device 4 and a programmed stepping motor 5; the lower part of the glass fiber column 2 is buried in the sand surface 1 and is perpendicular to the sand surface 1; the mechanical rotating device 4 comprises a main body ring sleeve 7, a neck sleeve 8, an upper U-shaped sheet 10, an upper bearing 11, an I-shaped rod 12, a lower U-shaped sheet 13, a lower bearing 14, a bent rod 15 and a C-shaped half-open buckle 16; the main body ring sleeve 7 is sleeved on the upper part of the glass fiber column 2 and is fastened by a long screw 6, so that the whole rotating mechanical device 4 is fixed on the glass fiber column 2; the neck sleeve 8 is uniformly welded on the outer periphery of the main body ring sleeve 7 in a radial direction, the end of the neck sleeve 8 is fixed with the upper U-shaped sheet 10, and the U-shaped section of the upper U-shaped sheet 10 is parallel to the radial direction of the glass fiber column 2 and the main body ring sleeve 7; the upper U-shaped sheet 10 is internally provided with the upper bearings 11 on the left and right sides, the two upper bearings 11 are connected with the two lower bearings 14 through the I-shaped rod 12, the two lower bearings 14 are externally provided with the lower U-shaped sheet 13, the upper rod and the lower rod of the I-shaped rod 12 are vertically arranged through a middle rod, so that the setting direction of the upper U-shaped sheet 10 is perpendicular to the setting direction of the lower U-shaped sheet 13, and then the lower U-shaped sheet 13 driven by the I-shaped rod 12 can swing in the front-back direction relative to the upper U-shaped sheet 10, and the lower U-shaped sheet 13 can swing in the inside-outside direction relative to the upper U-shaped sheet 10 and the I-shaped rod 12; the bent rod 15 is welded with the bottom end of the lower U-shaped sheet 13 at the upper end, and the C-shaped half-open buckle 16 is arranged at the lower end, and the acoustic detector 3 is clamped on the C-shaped half-open buckle 16 of the mechanical rotating device 4; and the programmed stepping motor 5 is inserted on the small holes reserved on the outer parts of the upper U-shaped sheet 10 and the lower U-shaped sheet 13, so as to control the rotating angle of the mechanical rotating device 4 in two directions. The glass fiber column 2 is arranged and the lower part of the glass fiber column 2 is buried in the sand surface 1 to simulate a bridge pier foundation under a sea surface, the acoustic detector 3 is rotated in the inside-outside direction and the front-back direction through the mechanical rotating device 4, so as to realize real-time detection of the distance from the probe to the sand surface 1; and the rotating angle, speed and step number of the mechanical rotating device 4 are controlled through the programmed stepping motor 5. The application realizes accurate simulation of real-time monitoring of local scouring of foundation based on the acoustic detection principle. The collected data can be transmitted into a computer in real time, visualization is realized through programming software, and the problem of real-time monitoring of local scouring of foundation can be researched.

[0022] The above merely describes the preferred embodiment of the application, but the protection scope of the application is not limited to this. Any person skilled in the art can make equivalent replacement, change or modification according to the technical scheme and the inventive concept of the application within the technical range disclosed by the application, which should be covered in the protection scope of the application.

Claims

1. A real-time monitoring test device for local scour based on acoustic principle, characterized in that, It comprises a glass fiber column (2), a sand surface (1), an acoustic detector (3), a mechanical rotating device (4) and a programmed stepping motor (5). The lower part of the glass fiber column (2) is buried in the sand surface (1) and is perpendicular to the sand surface (1), and the upper part is provided with the mechanical rotating device (4), the acoustic detector (3) is assembled on the mechanical rotating device (4), which can drive the acoustic detector (3) to swing in the inside-out and front-back directions, the programmed stepping motor (5) is arranged on the mechanical rotating device (4), and the programmed stepping motor (5) is used for controlling the rotation angle of the mechanical rotating device (4) in the two directions. The mechanical rotating device (4) comprises a main circular sleeve (7), a neck sleeve (8), an upper U-shaped sheet (10), an upper bearing (11), an I-shaped rod (12), a lower U-shaped sheet (13), a lower bearing (14), a bent rod (15) and a C-shaped half-opening buckle (16); the main circular sleeve (7) is sleeved and fixed on the upper part of the glass fiber column (2), the neck sleeves (8) are uniformly fixed in the radial direction of the outer periphery of the main circular sleeve (7), the tail end of the neck sleeve (8) is fixed with the upper U-shaped sheet (10), and the U-shaped section of the upper U-shaped sheet (10) is parallel to the radial direction of the glass fiber column (2) and the main circular sleeve (7); the inside of the upper U-shaped sheet (10) is provided with the upper bearings (11) on both sides, the two upper bearings (11) are connected with the two lower bearings (14) through the I-shaped rod (12), the two lower bearings (14) are externally provided with the lower U-shaped sheet (13), the upper rod and the lower rod of the I-shaped rod (12) are vertically arranged through the middle rod, so that the setting direction of the upper U-shaped sheet (10) and the lower U-shaped sheet (13) is perpendicular, and then the I-shaped rod (12) drives the lower U-shaped sheet (13) to realize the front-back swinging relative to the upper U-shaped sheet (10), and the lower U-shaped sheet (13) realizes the inside-out swinging relative to the upper U-shaped sheet (10) and the I-shaped rod (12); the upper end of the bent rod (15) is fixed to the bottom end of the lower U-shaped sheet (13), and the lower end is provided with the C-shaped half-opening buckle (16), the acoustic detector (3) is clamped on the C-shaped half-opening buckle (16) of the mechanical rotating device (4), and is used for real-time detection of the distance from the probe to the sand surface.

2. The real-time monitoring test device for local scour based on acoustic principle according to claim 1, characterized in that, The programmed stepping motor (5) is inserted into the small hole reserved outside the upper U-shaped sheet (10) and the lower U-shaped sheet (13) to control the rotation angle, speed and step number of the mechanical rotating device (4) in the two directions.

3. The real-time monitoring test device for local scour based on acoustic principle according to claim 1, characterized in that, The glass fiber column (2) is used for simulating the offshore water surface under the pier foundation, and the depth of the lower part buried in the sand surface (1) is adjusted according to actual requirements.

4. The real-time monitoring test device for local scour based on acoustic principle according to claim 1, characterized in that, The acoustic detector (3) realizes real-time monitoring of the dynamic process of local scouring of the foundation through the acoustic detection principle, and transmits the collected data to the computer in real time for visual processing.

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