A piezoelectric sensor-based early warning device for roadside slope damage

Abstract

This utility model discloses a highway slope disaster and disease early warning device based on a piezoelectric sensor, belonging to the field of road engineering construction technology. It solves the problems of unstable power supply and poor early warning effect in existing highway disaster and disease early warning structures. This utility model features a piezoelectric power supply structure on the road surface base layer, connected to a traffic information early warning structure. The piezoelectric power supply structure includes a piezoelectric sensor, wires, and a battery; the traffic information early warning structure includes a column, a traffic information board, and a display screen. This utility model solves the problem of high power supply costs, eliminates the influence of factors such as power supply distance, complex geological conditions, and harsh weather, and simultaneously recovers and utilizes the kinetic energy of vehicle loads, responding to the national call for energy conservation and emission reduction.

Description

Technical Field

[0001] This utility model belongs to the field of road engineering construction technology, specifically relating to a highway slope disaster and disease early warning device based on piezoelectric sensors. Background Technology

[0002] Currently, roadside audio-visual early warning systems for highway disasters and hazards primarily rely on roadside traffic information boards. These boards are mainly categorized into electrically powered and solar-powered types. The former receives power from nearby villages, towns, or the power grid to broadcast disaster and hazard information, resulting in high power supply costs and significant communication costs among multiple departments. The latter connects solar panels to the top of the traffic information board, which then power the warning devices and store some energy for use at night and on cloudy days. However, these solar-powered traffic information boards have limited energy storage, limiting their use to smaller alarm devices. Furthermore, they may experience insufficient power supply on shady slopes of the highway or during prolonged cloudy weather, potentially leading to equipment malfunction.

[0003] Therefore, to address the above issues, it is necessary to further optimize the power supply method of the highway disaster and disease early warning structure, and seek a highway disaster and disease early warning structure with low engineering cost and stable power supply, so as to improve the early warning effect of highway disasters and diseases and reduce the disaster losses and casualties caused by highway disasters and diseases. Utility Model Content

[0004] The purpose of this invention is to provide a highway slope disaster and disease early warning device based on piezoelectric sensors, so as to solve the problems of unstable power supply and poor early warning effect of existing highway disaster and disease early warning structures.

[0005] The technical solution of this utility model is: a highway slope disaster and disease early warning device based on piezoelectric sensors, applied to the road base layer, with a piezoelectric power supply structure on the road base layer, and a traffic information early warning structure connected to the piezoelectric power supply structure. The piezoelectric power supply structure includes a piezoelectric sensor, wires and a battery; the traffic information early warning structure includes a column, a traffic information board and a display screen.

[0006] A sealing groove is provided on the surface layer of the road surface above the road base. Multiple piezoelectric sensors are installed in the sealing groove and connected by wires. The piezoelectric sensors are connected to the battery through wires.

[0007] The column is located next to the road base layer. The battery is located inside the column and electrically connected to the traffic information board. The upper part of the column is connected to the traffic information board through a horizontal bracket. The display screen is located on the traffic information board. A wireless WiFi module is installed on the top of the column. The piezoelectric sensor, traffic information board and wireless WiFi module are electrically connected.

[0008] As a further improvement of this utility model, the display module on the traffic information board includes a switching power supply, a module control board, and a drive circuit board connected in sequence.

[0009] As a further improvement of this utility model, a steel mesh is provided at the upper end of the encapsulation groove, and the piezoelectric sensor is located below the steel mesh.

[0010] As a further improvement of this utility model, the column is set on a concrete foundation.

[0011] The beneficial effects of this utility model are as follows:

[0012] The piezoelectric sensor of this invention is composed of piezoelectric ceramics and epoxy resin, and is led out by wires. It has a compact structure and stable power supply, can be mass-produced, has low cost, and is easy to install. It only requires road surface grooving and encapsulation near the traffic information board. Compared with nearby villages and towns using electricity and solar panels, piezoelectric ceramics have higher durability, longer service life, lower cost, simpler replacement, and significantly reduced maintenance costs.

[0013] This utility model features a highway disaster and hazard early warning function. When a vehicle passes through a disaster-prone section, vibrations occur. The piezoelectric sensor, upon experiencing these vibrations, generates a positive piezoelectric effect, converting mechanical energy into electrical energy. This electrical energy is then transmitted through wires to a battery for storage. The battery then supplies power to the traffic information display screen via wires. A wireless Wi-Fi module on the pillar receives real-time information from highway disaster and hazard monitoring equipment behind the vehicle. If the displacement rate of the highway slope monitoring equipment is too fast or reaches a set threshold, it sends an early warning to the monitoring platform. After algorithm verification and calculation, the monitoring platform sends the early warning information to the management personnel. Upon issuing an instruction, the management personnel at the monitoring center transmit the disaster and hazard early warning information to the traffic information board via the wireless Wi-Fi module. After receiving the information, the traffic information board pushes the pre-prepared early warning information to the display screen via the module control board.

[0014] The warning structure of this utility model does not change the structure of the traffic information board itself. It only requires the installation of piezoelectric sensors through grooves in the road surface to connect to the power supply, which solves the problem of high power supply cost and gets rid of the adverse effects of power supply distance, complex geology and harsh weather. At the same time, it can recover and utilize the kinetic energy of vehicle load, responding to the national call for energy conservation and emission reduction. Attached Figure Description

[0015] Figure 1 This is a front view of the structure of this utility model;

[0016] Figure 2 This is a top view of the utility model in use;

[0017] Figure 3 This is a structural diagram of the traffic information board display module in this utility model.

[0018] In the diagram: 1-Piezoelectric sensor; 2-Reinforcing mesh; 3-Road surface layer; 4-Encapsulation groove; 5-Road base layer; 6-Display screen; 7-Traffic information board; 8-Post; 9-Battery; 10-Wire; 11-Slope; 12-Concrete foundation; 13-Wireless Wi-Fi module; 14-Transverse support; 15-Shoulder; 16-Traffic lane; 17-Data control line; 18-Piezoelectric sensor energy storage power supply; 19-Drive board display column; 701-Switching power supply; 7011-Filter; 7012-... 7013 - Rectifier and Filter; 7014 - Power Switch; 7015 - Driver; 7016 - Second Rectifier and Filter; 7017 - PVN Control; 7018 - Fan; 702 - Module Control Board; 7021 - Optical Controller; 7022 - Image Random Access Memory; 7023 - Read-Only Memory; 7024 - Random Access Memory; 7025 - Processor; 703 - Driver Circuit Board; 7031 - Current Detection Circuit; 7032 - Constant Current Driver ICX2; 7033 - LED Tube. Detailed Implementation

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] like Figures 1-3 As shown, a piezoelectric sensor-based early warning device for road slope hazards is applied to the road base layer 5. A piezoelectric power supply structure is provided on the road base layer 5, and a traffic information early warning structure is connected to the piezoelectric power supply structure. The piezoelectric power supply structure includes a piezoelectric sensor 1, a wire 10, and a battery 9. The traffic information early warning structure includes a column 8, a traffic information board 7, and a display screen 6.

[0021] A sealing groove 4 is provided on the road surface layer 3 above the road base layer 5. Multiple piezoelectric sensors 1 are provided in the sealing groove 4 and connected by wires 10. The piezoelectric sensors 1 are connected to the battery 9 through wires 10.

[0022] The column 8 is located on the side of the road base layer 5. The battery 9 is located inside the column 8 and is electrically connected to the traffic information board 7. The upper end of the column 8 is connected to the traffic information board 7 through the horizontal bracket 14. The display screen 6 is located on the traffic information board 7. The top of the column 8 is equipped with a wireless WiFi module 13. The piezoelectric sensor 1, the traffic information board 7 and the wireless WiFi module 13 are electrically connected.

[0023] The display module on the traffic information board 7 includes a switching power supply 701, a module control board 702, and a drive circuit board 703 connected in sequence. A reinforcing mesh 2 is provided at the upper end of the encapsulation slot 4, and the piezoelectric sensor 1 is located below the reinforcing mesh 2. The column 8 is mounted on a concrete foundation 12.

[0024] Example 1

[0025] The piezoelectric sensor 1 is installed in the encapsulation groove 4 of the road surface layer 3. The piezoelectric sensor 1 is fixed with epoxy resin and connected to the battery 9 with wire 10. The battery 9 is fixed inside the pole 8. The pole 8 is erected on the concrete foundation 12. The display screen 6 and traffic information 7 are installed on the upper part through the horizontal bracket 14. The top of the pole 8 is equipped with a wireless wifi module 13.

[0026] After being connected by wire 10, the piezoelectric sensor 1 is placed in the encapsulation groove 4. The top of the piezoelectric sensor 1 is protected by the steel mesh 2. Maintenance only requires removing the steel mesh 2 to replace the piezoelectric sensor 1 separately.

[0027] The piezoelectric sensor 1 uses lead-based piezoelectric ceramic with lead zirconate titanate as the core. The specific model of the piezoelectric sensor 1 is PZT-5H. It can be set with 6-12 groups depending on the road width. The diameter is 20mm and the thickness is 0.4mm. The piezoelectric sensor 1 is coated with a layer of epoxy resin for waterproofing and fixed to the bottom of the encapsulation groove 4. The encapsulation groove 4 is 15cm wide and 1.5m narrower than the actual road width.

[0028] Battery 9 is a lithium battery with dimensions of 420*150*150mm (length*width*height), a voltage of 220V, and a capacity of 3500Wh, which can continuously power the traffic information board 7.

[0029] The concrete foundation 12 is located between the outer side of the shoulder 15 and the slope 11. The inner edge of the traffic information board 7 is no less than 25cm from the road surface or earthen shoulder, and the lower edge of the traffic information board 7 is 5.5m above the road surface.

[0030] Each pixel of the display screen 6 is composed of red and pure green LEDs. The red LEDs are made of aluminum, indium, gallium and phosphorus ultra-high brightness LED tubes, and the green LEDs are made of gallium nitride ultra-high brightness LED tubes.

[0031] The static viewing distance of display screen 6 is no less than 250 meters, the dynamic viewing distance is no less than 210 meters, the refresh rate of each screen is no less than 100Hz, and the content of the sign should be clear and stable when the car is traveling at high speed.

[0032] Traffic information board 7 is an F-type variable message sign, primarily used to disseminate disaster and disease warnings, guide traffic flow, and ensure safe and smooth highway traffic. The F-type variable message sign has a display size of 1.6m × 3.2m, a dot matrix of 64,128 pixels, and can display Chinese, English, and other languages. Each pixel consists of red and pure green LEDs in a 2:1 ratio, displaying red, green, and yellow colors. The brightness per square meter of the display board is ≥8000 cd, and it communicates wirelessly via Wi-Fi.

[0033] The display module on the traffic information board 7 is connected to the display screen 6 controller via data control line 17. The switching power supply 701 includes a filter 7011, a first rectifier filter 7012, and a power switch 7013 connected in sequence. The power switch 7013 is connected to the driver 7014 and the second rectifier filter 7015 respectively. The second rectifier filter 7015 is connected to the PVN control 7016 and the fan control 7017 respectively. The fan control 7017 is connected to the fan 7018. The driver 7014 and the PVN control 7016 are interconnected. The filter 7011 is connected to the piezoelectric sensor energy storage power supply 18.

[0034] The module control board 702 includes an optical controller 7021, an image random access memory 7022, a read-only memory 7023 and a random access memory 7024 connected in sequence, and the image random access memory 7022 is connected to a processor 7025.

[0035] The driver circuit board 703 includes three identical driver board display columns 19 connected in series. Each driver board display column 19 contains two sets of identical and connected 8×4 driver circuit boards 703. Each 8×4 driver circuit board 703 includes a current detection circuit 7031 and a constant current drive ICX27032. The 8×4 driver circuit board 703 is connected to an LED tube 7033.

[0036] The traffic information board 7 can be edited in full screen via the module control board 702. The module control board 702 is equipped with a level 1 and 2 simplified Chinese font library, with more than five fonts including Song, Kai, Hei, Fangsong, and Lishu. The font, weight, spacing between Chinese characters, and position of Chinese characters on the screen can all be adjusted. Both text and graphics should have flashing and moving functions, and the frequency and speed of flashing and moving can be adjusted.

[0037] The module control board 702 adopts an industrial-grade embedded low-power 32-bit processor with dual interfaces for network communication and on-site debugging. When it receives instructions from the highway disaster and disease monitoring platform, it should verify the validity and accuracy, send a confirmation signal to the monitoring computer, and drive the traffic information board 7 to display the corresponding content.

[0038] The photosensitive controller in module control board 702 can automatically adjust the brightness of the display screen 6 under various lighting conditions by using a 32-level dimming function according to the external environmental conditions.

[0039] When using piezoelectric sensors for early warning of highway disasters and malfunctions, follow these steps:

[0040] Step 1: Excavate and pour concrete foundation 12 according to design drawings, and set anchor bolts and flanges at the center of its top. After curing, install column 8 on the upper part. Inspection port is set on the side of column 8 for checking power supply connection and installation, and replacing battery 9. After column 8 is erected, install horizontal support 14 and wireless wifi module 13. Install traffic information board 7 and display screen 6 in the corresponding positions on horizontal support 14.

[0041] Step 2: Design the number of piezoelectric sensors 1 according to the site conditions. Excavate the encapsulation trench 4 on the road surface layer 3, ensuring that the bottom of the trench is flat and free of debris. After connecting the piezoelectric sensor 1 and the wire 10 with high-performance adhesive, fix them to the bottom of the trench and then waterproof them with epoxy resin. Add a steel mesh 2 to the top of the piezoelectric sensor 1 for protection.

[0042] Step 3: After connecting the wires to the battery 9, test all equipment to ensure normal installation. Test various aspects such as power supply, communication of the wireless WiFi module 13, information display on the display screen 6, editing of warning information on the traffic information board 7, and energy storage of the battery 9 to ensure that the warning structure is working properly.

[0043] Step 4, as follows Figure 2 As shown in the driving direction, after a vehicle travels on the road in lane 16, the vehicle's dynamic load causes the road surface to vibrate slightly. The piezoelectric sensor 1 receives the slight vibration and converts the mechanical energy of the vehicle's dynamic load into electrical energy, which is then transmitted to the battery 9 via the wire 10 for storage.

[0044] In steps 5 and 4, the battery supplies power to the traffic information board 7 via the switching power supply 701, and the entire highway disaster and disease early warning structure begins to operate. If the displacement rate of the rear highway slope monitoring equipment is too fast or reaches the set threshold, it sends an early warning to the monitoring platform. After the monitoring platform verifies and calculates the information using an algorithm, it sends the early warning information to the management personnel. After the management personnel confirm that there are no errors, they issue an instruction and receive the highway disaster and disease early warning information in real time through the wireless Wi-Fi module 13 on the column. After receiving the information, the traffic information board 7 pushes the pre-compiled early warning information to the drive board circuit board 703 through the module control board 702 to broadcast the early warning information, thereby providing early warning to drivers and reducing casualties and economic losses caused by sudden highway disasters and diseases.

[0045] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0046] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A piezoelectric sensor-based early warning device for road slope defects, applied to road base course, characterized in that: The piezoelectric power supply structure is provided on the road base layer (5), and a traffic information warning structure is connected to the piezoelectric power supply structure. The piezoelectric power supply structure includes a piezoelectric sensor (1), a wire (10) and a battery (9); the traffic information warning structure includes a column (8), a traffic information board (7) and a display screen (6). A sealing groove (4) is provided on the road surface layer (3) above the road base (5). Multiple piezoelectric sensors (1) are connected by wires (10) in the sealing groove (4). The piezoelectric sensors (1) are connected to the storage battery (9) by wires (10). The column (8) is located on the side of the road base (5). The battery (9) is located inside the column (8) and is electrically connected to the traffic information board (7). The upper end of the column (8) is connected to the traffic information board (7) through the horizontal bracket (14). The display screen (6) is located on the traffic information board (7). The top of the column (8) is equipped with a wireless WiFi module (13). The piezoelectric sensor (1), the traffic information board (7) and the wireless WiFi module (13) are electrically connected.

2. The early warning device for highway slope hazards based on piezoelectric sensors according to claim 1, characterized in that: The display module on the traffic information board (7) includes a switching power supply (701), a module control board (702), and a drive circuit board (703) connected in sequence.

3. A highway slope disaster early warning device based on a piezoelectric sensor according to claim 1 or 2, characterized in that: The upper end of the encapsulation groove (4) is provided with a steel mesh (2), and the piezoelectric sensor (1) is located below the steel mesh (2).

4. The early warning device for roadside slope hazards based on a piezoelectric sensor according to claim 3, characterized in that: The column (8) is set on a concrete foundation (12).

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