A distributed piezoelectric sensing sea dike inclination monitoring system

Abstract

This invention discloses a distributed piezoelectric sensing seawall tilt monitoring system, comprising a distributed piezoelectric geocline, a protective tube, and a displacement component. The distributed piezoelectric geocline is longitudinally arranged within the protective tube. One end of the displacement component passes through the protective tube and connects to the distributed piezoelectric geocline within the tube, while the other end is located outside the protective tube and coupled to the soil. This distributed piezoelectric sensing seawall tilt monitoring system of the present invention places the distributed piezoelectric geocline within a rigid protective tube, preventing the soil lateral pressure from directly acting on the distributed piezoelectric geocline. The distributed piezoelectric geocline interacts indirectly with the soil through the displacement component, with one end of the displacement component coupled to the soil. This allows the soil displacement to be indirectly transmitted to the distributed piezoelectric geocline, causing corresponding deformation in the geocline for monitoring.

Description

Technical Field

[0001] This invention relates to a distributed piezoelectric sensing seawall tilt monitoring system. Background Technology

[0002] Seawalls are hydraulic structures built along coastlines to protect against tides and waves, serving as crucial barriers to safeguard the lives and property of coastal residents. Therefore, it is essential to monitor and provide early warning of seawall deformation to effectively ensure their safe use.

[0003] In recent years, sensing technologies based on the piezoelectric effect and mechatronic impedance effect have developed rapidly. Organic piezoelectric materials, represented by polyvinylidene fluoride piezoelectric films, have advantages such as good flexibility, excellent piezoelectric properties, and the ability to be processed into any shape, thus compensating for the shortcomings of piezoelectric ceramics. The technology of using piezoelectric cables to monitor horizontal displacement is also developing rapidly. However, piezoelectric cables need to be installed in the soil. Due to the brittleness of piezoelectric cables, distributed piezoelectric geotextile cables are prone to damage and decreased accuracy under the lateral pressure of the soil. Summary of the Invention

[0004] To address the above shortcomings, the present invention aims to provide a distributed piezoelectric sensing seawall tilt monitoring system that can effectively protect piezoelectric cables.

[0005] Therefore, the present invention provides a distributed piezoelectric sensing seawall tilt monitoring system, which includes a distributed piezoelectric geocline, a protective tube, and a displacement component. The distributed piezoelectric geocline is longitudinally arranged in the protective tube. One end of the displacement component passes through the protective tube and is connected to the distributed piezoelectric geocline in the protective tube, while the other end is located outside the protective tube and coupled to the soil.

[0006] Furthermore, the protective pipe has a connecting hole on its side wall, the displacement assembly includes a connecting rod and a connecting head, the connecting rod is connected to the connecting head, the connecting head is coupled in the soil, the connecting rod passes through the connecting hole, and the connecting hole is provided with an elastic seal.

[0007] Furthermore, the distributed piezoelectric geocable includes a piezoelectric geocable, a multi-core conductor, an anchor point, and a heat-shrink tubing. The piezoelectric geocable is connected to the multi-core conductor, and the signal of the piezoelectric geocable is transmitted by the multi-core conductor. The heat-shrink tubing encapsulates and waterproofs the connection between the distributed piezoelectric geocable and the multi-core conductor. The anchor point is connected to a connecting rod.

[0008] Furthermore, the connector is coupled to the soil through grouting.

[0009] Furthermore, it also includes a correction device for distributed piezoelectric geocables, which is used to reset distributed piezoelectric geocables that have been deformed by stress.

[0010] Furthermore, it includes a first connecting rod, a second connecting rod, and a threaded tube. The threaded tube includes a tube body and a cover. One end of the tube body is provided with a limiting plate. One end of the second connecting rod is connected to the anchor point. The other end of the second connecting rod passes through the cover in a T-shape and is movably mounted on the limiting plate. The cover is threadedly fixed to the tube body. The second connecting rod is movably connected between the limiting plate and the cover. The surface of the first connecting rod is provided with an external thread that is threadedly connected to the threaded tube. When the threaded tube rotates, it can drive the anchor point to move radially.

[0011] Furthermore, the surface of the threaded tube is provided with gears, and a rack can be inserted into the protective tube. The rack and gear cooperate to rotate the threaded tube, thereby adjusting the position of the anchoring point.

[0012] Furthermore, the protective tube has a built-in groove, and the rack is inserted into the groove and engages with the gear, the width of the rack being greater than the width of the gear.

[0013] Furthermore, the protective tube is equipped with multiple segments of distributed piezoelectric geoclines, each segment of which is equipped with a corresponding moving device and uses the same multi-core conductor for signal transmission.

[0014] Beneficial technical effects of the present invention:

[0015] The distributed piezoelectric sensing seawall tilt monitoring system of the present invention sets the distributed piezoelectric geocable in a rigid protective pipe, avoiding the direct action of soil lateral pressure on the distributed piezoelectric geocable. The distributed piezoelectric geocable interacts with the soil indirectly through a displacement component. One end of the displacement component is coupled to the soil, which can indirectly transmit the displacement of the soil to the distributed piezoelectric geocable, causing the geocable to deform accordingly and thus enabling monitoring.

[0016] In a specific embodiment of the present invention, a correction system is also provided. When the distributed piezoelectric geocable undergoes a certain degree of deformation, it can be reset by the correction system to avoid cable damage and a decrease in measurement accuracy. Attached Figure Description

[0017] Figure 1 A schematic diagram of the setup of a distributed piezoelectric sensing seawall tilt monitoring system;

[0018] Figure 2 This is a schematic diagram of Embodiment 1 of the present invention;

[0019] Figure 3 This is a schematic diagram of Embodiment 2 of the present invention;

[0020] Figure 4 This is a top view of Example 2;

[0021] Figure 5A schematic diagram of the anchorage points for a distributed piezoelectric geocable.

[0022] Figure 6 This is a schematic diagram of the conductor connections for a distributed piezoelectric geocable.

[0023] Explanation of reference numerals in the attached drawings: 1. Distributed piezoelectric geocable; 101. Piezoelectric geocable; 102. Multi-core conductor; 103. Anchor point; 2. Protective tube; 3. Connecting rod; 301. First connecting rod; 302. Second connecting rod; 303. Connector; 4. Limiting device; 5. Threaded tube; 6. Limiting baffle; 7. Gear; 8. Groove; 9. Limiting plate; 10. Cover. Detailed Implementation

[0024] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0025] Reference Figures 1 to 6 As shown, a distributed piezoelectric sensing seawall tilt monitoring system of the present invention includes a distributed piezoelectric geocable 1, a protective pipe 2, and a displacement component. The distributed piezoelectric geocable 1 is longitudinally arranged in the protective pipe 2. One end of the displacement component passes through the protective pipe 2 and is connected to the distributed piezoelectric geocable 1 in the protective pipe 2, while the other end is located outside the protective pipe 2 and coupled to the soil. In this embodiment, the protective pipe 2 is longitudinally arranged in the soil below the seawall. One end of the protective pipe 2 is fixed in the concrete structure of the seawall. Multiple segments of the distributed piezoelectric geocable 1 are arranged in the protective pipe 2. Each segment of the distributed piezoelectric geocable 1 is equipped with a corresponding moving device, and the same multi-core wire 102 is used for signal transmission. The specific structure and connection method of the distributed piezoelectric geocable 1 have been disclosed in other patent documents, and are only briefly described here. Figure 5 and Figure 6 As shown, a distributed piezoelectric geocable 1 generally includes a piezoelectric geocable 101 and a multi-core conductor 102. After the piezoelectric geocable 101 and the multi-core conductor 102 are connected, they are sealed with heat-shrink tubing for waterproofing. Deformation of the piezoelectric geocable 101 generates an electrical signal. This signal is collected by a set acquisition device and uploaded to the system computer via the multi-core conductor 102. The computer performs corresponding analysis to determine the horizontal displacement at that point. (Refer to...) Figure 2As shown, in this embodiment, the distributed piezoelectric geocable 1 is straightly installed in the protective pipe 2. A connecting hole is provided in the protective pipe 2 corresponding to the anchor point 103. The connecting rod 3 of the displacement component passes through the connecting hole, with one end connected to the anchor point 103 by bolts, and the other end equipped with a connector 303. The connector 303 has a large volume and couples with the soil. When the soil in the corresponding soil layer undergoes horizontal displacement, it pushes the connector 303 and the connecting rod 3 to move horizontally. The connecting rod 3 pushes the anchor point 103 in the protective pipe 2 to displace, causing the distributed piezoelectric geocable 1 to deform. The acquisition device collects the corresponding electrical signal generated and uploads it to the system for analysis, thus determining the specific location and displacement of the horizontal displacement. In this embodiment, an elastic seal is provided in the connecting hole for sealing. This embodiment is generally used to measure horizontal displacement in a single direction. If it is necessary to measure displacement in multiple directions, a design is required, using an array of multiple sets of protective pipes 2 and distributed piezoelectric geocable 1. In addition, seawall monitoring also includes monitoring of settlement, cracks, etc. This embodiment requires collaborative monitoring with other monitoring equipment and cannot complete the monitoring of all items independently. This embodiment is generally set up for monitoring in areas with uniform settlement. In areas with uneven settlement, limiting devices 4 can be set on both sides of the connecting hole in this embodiment to restrict the longitudinal movement of the displacement component and avoid uneven settlement affecting the horizontal displacement monitoring. In order to prevent the connector 303 from separating from the soil and affecting the accuracy of horizontal displacement monitoring, grouting can also be used to bond the connector 303 to the surrounding soil.

[0026] In the above embodiment, after a relatively long period of time, if the seawall and soil experience a certain horizontal displacement, the distributed piezoelectric geocable 1 will deform. The core structure of the distributed piezoelectric geocable 1 is a piezoelectric ceramic film; if the deformation exceeds a certain threshold, its core structure will be damaged, affecting the accuracy of horizontal displacement monitoring. (Refer to...) Figure 2As shown, a correction device is installed on the connecting rod 3. When the horizontal displacement value monitored by the horizontal displacement reaches the set value or after a predetermined time, the distributed piezoelectric geocable 1 is corrected to restore it to a straight or relatively straight state. Specifically, the connecting rod 3 is cut into two independent sections and then connected by a threaded tube 5. When the threaded tube 5 is rotated using a device, the section of the connecting rod coupled to the soil, i.e., the first connecting rod 301, will not move. However, the rotation of the threaded tube 5 drives the second connecting rod 302 on the other side to move radially, thus restoring the piezoelectric geocable 101, which has deformed to one side, to a straight or relatively straight state, avoiding cable damage and preventing interference with the horizontal displacement monitoring results. In this embodiment, to prevent the first connecting rod 301 and the second connecting rod 302 from rotating, the first connecting rod 301 can adopt a combination of a square structure and a circular structure. The square structure passes through a connecting hole, or the square structure cooperates with the square hole in the limiting structure to restrict rotation. Limiting baffles 6 can be used on both sides of the anchor point 103 to prevent rotation.

[0027] In Embodiment 1, a gear 7 is provided on the surface of the threaded tube 5. A rack can be provided or inserted into the protective tube 2. The rack and gear 7 cooperate to rotate the threaded tube 5, thereby adjusting the position of the anchor point 103. To facilitate the cooperation between the rack and gear 7, a groove 8 is built into the protective tube 2. The positions of the gear 7 and the groove 8 are set so that they just cooperate with the rack. The rack is inserted from the groove 8 and cooperates with the gear 7. Since the position of the gear 7 changes after displacement, the width of the rack is greater than the width of the gear 7, which facilitates operation. In addition, the width of the groove 8 can be greater than the width of the rack, allowing the rack to extend into the groove 8 from outside the position of the gear 7 and then move to cooperate with the gear 7.

[0028] In embodiment 2, the connecting rod 3 includes a first connecting rod 301, a second connecting rod 302, and a threaded pipe 5. One end of the second connecting rod 302 is connected to the anchor point 103. The threaded pipe 5 includes a pipe body and a cover 10. One end of the pipe body is provided with a limiting plate 9. The second connecting rod 302 passes through the cover 10 in a T-shape and is movably mounted on the limiting plate 9, threading the cover 10 to the pipe body. The second connecting rod 302 is movably connected between the limiting plate 9 and the cover 10. The surface of the first connecting rod 301 is provided with external threads and is threaded to the threaded pipe 5. When the threaded pipe 5 rotates, it can drive the anchor point 103 to move radially. In this embodiment, a displacement device can be provided on each side of the anchor point 103. Due to the overall movement of the soil, the soil on both sides of the protective pipe 2 will produce the same displacement.

[0029] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A distributed piezoelectric sensing seawall tilt monitoring system, comprising distributed piezoelectric geocables, characterized in that: It also includes a protective tube and a displacement assembly. The distributed piezoelectric geocable is longitudinally arranged in the protective tube. One end of the displacement assembly passes through the protective tube and is connected to the distributed piezoelectric geocable in the protective tube. The other end is located outside the protective tube and coupled to the soil. It also includes a correction device for distributed piezoelectric geocables, which is used to restore the distributed piezoelectric geocables that have been deformed by stress. It includes a first connecting rod, a second connecting rod, and a threaded tube. The threaded tube includes a tube body and a cover. One end of the tube body is provided with a limiting plate. One end of the second connecting rod is connected to the anchor point. The other end of the second connecting rod passes through the cover in a T-shape and is movably mounted on the limiting plate. The cover is threadedly fixed to the tube body. The second connecting rod is movably connected between the limiting plate and the cover. The surface of the first connecting rod is provided with an external thread that is threadedly connected to the threaded tube. When the threaded tube rotates, it can drive the anchor point to move radially.

2. The distributed piezoelectric sensing seawall tilt monitoring system according to claim 1, characterized in that: The protective pipe has a connecting hole on its side wall. The displacement assembly includes a connecting rod and a connecting head. The connecting rod is connected to the connecting head, and the connecting head is coupled in the soil. The connecting rod passes through the connecting hole, and an elastic seal is provided in the connecting hole.

3. The distributed piezoelectric sensing seawall tilt monitoring system according to claim 2, characterized in that: The distributed piezoelectric geocable includes a piezoelectric geocable, a multi-core conductor, an anchor point, and a heat shrink tubing. The piezoelectric geocable is connected to the multi-core conductor, and the signal of the piezoelectric geocable is transmitted by the multi-core conductor. The heat shrink tubing encapsulates and waterproofs the connection between the distributed piezoelectric geocable and the multi-core conductor. The anchor point is connected to a connecting rod.

4. A distributed piezoelectric sensing seawall tilt monitoring system according to claim 2 or 3, characterized in that: The connector is coupled to the soil through grouting.

5. A distributed piezoelectric sensing seawall tilt monitoring system according to claim 1, characterized in that: The surface of the threaded tube is provided with gears, and a rack can be inserted into the protective tube. The rack and gear cooperate to make the threaded tube rotate, thereby adjusting the position of the anchor point.

6. A distributed piezoelectric sensing seawall tilt monitoring system according to claim 5, characterized in that: The protective tube has a built-in groove, and the rack is inserted into the groove and engages with the gear. The width of the rack is greater than the width of the gear.

7. A distributed piezoelectric sensing seawall tilt monitoring system according to any one of claims 1 to 3, characterized in that: The protective tube contains multiple sections of distributed piezoelectric geocable, each section of which is equipped with a corresponding moving device and uses the same multi-core conductor for signal transmission.

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