A highway bridge safety monitoring system

Abstract

The invention discloses a highway bridge safety monitoring system, comprising a sensor module, a first single-chip microcomputer, a wireless transmission module and a first power generation device; the sensor module and the wireless transmission module are both connected to the first single-chip microcomputer; the first power generation device comprises a central rotating shaft and a device housing connected to the lower end of the central rotating shaft; a fixed support is arranged at the upper part of one end of the device housing, a cantilever beam is arranged on the fixed support, a piezoelectric sheet is fixed at one end of the cantilever beam close to the fixed support, and a windward blunt body capable of galloping is arranged at the other end of the cantilever beam; a tail rudder is arranged at the other end of the device housing; the piezoelectric sheet is connected to an energy storage module arranged in the device housing; the sensor module, the first single-chip microcomputer and the wireless transmission module are all connected to the energy storage module. Wind energy is used as power, and maintenance work such as battery replacement is not required, which saves a lot of manpower and material resources. The galloping principle and the piezoelectric effect are fully utilized to effectively save energy, and the system is suitable for small and medium-sized highway bridges with wide distribution and large number.

Description

Technical Field

[0001] The invention relates to the technical field of bridge safety, and in particular to a highway bridge safety monitoring system. Background Art

[0002] Bridges are an important part of highways, and bridge safety is directly related to the safety and smoothness of highway traffic. my country's small and medium-sized highway bridges are widely distributed, with many old bridges and long mileage, accounting for 87% of the total number of bridges in the country. With the development of my country's economy, the traffic volume has increased rapidly, and the vehicle load has increased. The safety monitoring of bridges has become increasingly important.

[0003] The existing monitoring method for small and medium-sized highway bridges is mainly manual monitoring, but this monitoring method is costly, low in frequency, and poor in accuracy. And because it does not have real-time monitoring and early warning functions, it is difficult to deal with emergencies. In order to conduct real-time monitoring and early warning of the safety of the operation of small and medium-sized highway bridges, it is necessary to install a sensor monitoring system on the bridge. However, the existing monitoring system is generally designed for large bridges, and it is too expensive and too complicated to be used in small and medium-sized bridges. In addition, the sensor is generally powered by a built-in power supply, and battery replacement and maintenance consume a lot of manpower and material resources, which is not suitable for small and medium-sized highway bridges that are widely distributed and numerous. Therefore, traditional monitoring systems powered by built-in power supplies are difficult to use in small and medium-sized highway bridges. Summary of the invention

[0004] The present invention provides a highway bridge safety monitoring system to solve the problem that the bridge monitoring system in the prior art uses a built-in power supply, resulting in high maintenance costs and being difficult to apply to a large number of small and medium-sized highway bridges.

[0005] A highway bridge safety monitoring system includes a sensor module, a first single chip microcomputer, a wireless transmission module and a first power generation device;

[0006] The sensor module and the wireless transmission module are both connected to the first single chip computer;

[0007] The first power generation device comprises a central rotating shaft and a device housing connected to the lower end of the central rotating shaft; a tail rudder is arranged at one end of the device housing; a fixed support is arranged at the upper part of the other end of the device housing, a cantilever beam is arranged on the side of the fixed support away from the tail rudder, a piezoelectric sheet is fixed at one end of the cantilever beam close to the fixed support, and a windward blunt body capable of galloping is arranged at the other end of the cantilever beam; the piezoelectric sheet is connected to an energy storage module arranged in the device housing;

[0008] The sensor module, the first single-chip microcomputer and the wireless transmission module are all connected to the energy storage module.

[0009] When implementing the highway bridge safety monitoring system provided by this technical solution, the sensor module is mounted on the bottom of the bridge. Under the action of wind force, the tail rudder drives the entire housing of the device to rotate with the central rotation axis as the central axis and then tracks the wind direction, so that the windward bluff body faces the wind direction. The windward bluff body vibrates under the action of wind force, driving the cantilever beam to swing periodically. During this process, the piezoelectric sheet will be deformed by force, and the piezoelectric sheet will generate current through the piezoelectric effect. The generated current is stored in the energy storage module, and the energy storage module is used to power the sensor module, the first single-chip microcomputer, and the wireless transmission module. The data collected by the sensor module is sent to the first single-chip microcomputer. The first single-chip microcomputer receives the data sent by the sensor module and sends it out through the wireless transmission module to monitor the safety of the highway bridge. By adopting the first power generation device of piezoelectric galloping power generation, wind energy is used to independently power the highway bridge safety monitoring system, and there is no need to perform maintenance work such as battery replacement, saving a lot of manpower and material resources. It is suitable for small and medium-sized highway bridges with wide distribution and large number.

[0010] Furthermore, it also includes a second single-chip microcomputer, a display screen, a wireless receiving module and a second power generation device. The display screen and the wireless receiving module are connected to the second single-chip microcomputer. The second power generation device has the same structure as the first power generation device. The second single-chip microcomputer, the display screen and the wireless receiving module are connected to the energy storage module of the second power generation device.

[0011] The second power generation device has the same structure as the first power generation device, and both use wind energy to independently power the second single-chip microcomputer, the display screen, and the wireless receiving module, without the need for maintenance work such as battery replacement, saving a lot of manpower and material resources. The wireless receiving module is used to receive data sent by the wireless transmitting module and send the received data to the second single-chip microcomputer. If the data received by the second single-chip microcomputer reaches the preset warning threshold, the second single-chip microcomputer sends a warning signal to the display screen, and the display screen displays the warning signal, so as to warn passing vehicles or people, reducing the accident rate of small and medium-sized highway bridges.

[0012] Furthermore, the energy storage module is an LTC3588-1 chip, which has a sorting and filtering function and a voltage-stabilizing capacitor, and can store the electric energy in the voltage-stabilizing capacitor after sorting and filtering the current generated by the piezoelectric sheet. The voltage-stabilizing capacitor in the first power generation device is connected to the sensor module, the first single-chip microcomputer, and the wireless transmission module for power supply, and the voltage-stabilizing capacitor in the second power generation device is connected to the second single-chip microcomputer, the display screen, and the wireless receiving module for power supply.

[0013] In other embodiments of the present invention, the energy storage module includes a rectifier filter circuit and a super capacitor, and the piezoelectric sheet, the rectifier filter circuit and the super capacitor are connected in sequence. First, the current generated by the piezoelectric sheet is rectified and filtered by the rectifier filter circuit, and then the electric energy is stored in the super capacitor. The super capacitor in the first power generation device is connected to the sensor module, the first single-chip microcomputer, and the wireless transmission module for power supply, and the super capacitor in the second power generation device is connected to the second single-chip microcomputer, the display screen, and the wireless receiving module for power supply.

[0014] Furthermore, the central rotating shaft includes an upper half shaft and a lower half shaft, and the upper half shaft and the lower half shaft are connected via a rotating bearing. The upper half shaft is used to be fixed on the bridge, and the lower half shaft is used to drive the device housing to rotate as a whole.

[0015] Furthermore, a mounting plate is provided at the top end of the upper half shaft, and the mounting plate can be fixed to the bridge by screws.

[0016] Furthermore, the sensor module is a strain sensor for collecting the strain of the highway bridge.

[0017] Furthermore, the cross-section of the windward bluff body is one of a semicircular, rectangular, square, triangular, trapezoidal, and Y-shaped.

[0018] Furthermore, the tail rudder includes a support rod connected to one end of the device housing, and a wing-shaped plate vertically arranged on the support rod. The tail rudder is installed at one end of the device housing to track the wind direction in real time and improve the utilization efficiency of wind energy.

[0019] Furthermore, a warning threshold is preset in the second single-chip computer. When the value of the data collected by the sensor module reaches 0.95 times, 1.05 times or 1.15 times the warning threshold, the display screen displays indication signals in three different colors accordingly.

[0020] The above technical solution proposes a highway bridge safety monitoring system, which has the following advantages:

[0021] (1) It only uses wind energy as the power source, and does not require human operation. It is fully automatic and does not require maintenance work such as battery replacement, saving a lot of manpower and material resources. It makes full use of the galloping principle and piezoelectric effect. The power supply device is small in size and converts wind energy into electrical energy to power the device. It can also store part of the electrical energy to ensure the normal operation of the device when the wind is insufficient. It can effectively save energy and is suitable for small and medium-sized highway bridges that are widely distributed and numerous.

[0022] (2) A tail rudder is installed at the rear end of the device housing, which has the ability to track wind direction and ensure the energy conversion efficiency of the power generation device. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of a first power generation device provided by an embodiment of the present invention;

[0024] Figure 2 is a structural block diagram of a highway bridge safety monitoring system provided by an embodiment of the present invention;

[0025] Figure 3 is a circuit principle block diagram of a first power generation device provided by an embodiment of the present invention;

[0026] Figure 4 yes Figure 3 A specific circuit diagram of the embodiment provided;

[0027] Figure 5 is a circuit diagram of a first power generation device provided in another embodiment of the present invention. DETAILED DESCRIPTION

[0028] The present invention will be described in detail below in conjunction with the accompanying drawings and specific implementations. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0029] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0030] Example 1

[0031] like Figures 1 to 3 As shown, in this embodiment, a highway bridge safety monitoring system is provided, including a sensor module 01, a first single-chip computer 02, a wireless transmission module 03 and a first power generation device;

[0032] The sensor module 01 and the wireless transmission module 03 are both connected to the first single chip computer 02;

[0033] The first power generation device comprises a central rotating shaft 1, a device housing 2 connected to the lower end of the central rotating shaft 1; a tail rudder 7 is arranged at one end of the device housing 2; a fixed support 3 is arranged at the upper part of the other end of the device housing 2, a cantilever beam 5 is arranged on the side of the fixed support 3 away from the tail rudder 7, a piezoelectric sheet 4 is fixed to one end of the cantilever beam 5 close to the fixed support 3, and a windward blunt body 6 capable of galloping is arranged at the other end of the cantilever beam 5; the piezoelectric sheet 4 is connected to an energy storage module arranged in the device housing 2;

[0034] The sensor module 01, the first single chip computer 02, and the wireless transmission module 03 are all connected to the energy storage module.

[0035] When the highway bridge safety monitoring system provided by the technical solution is implemented, the sensor module 01 is mounted on the bottom of the bridge. Under the action of wind force, the tail rudder 7 drives the device housing 2 as a whole to rotate around the central rotation axis 1 as the central axis and then track the wind direction, so that the windward bluff body 6 faces the wind direction. The windward bluff body 6 vibrates under the action of wind force, driving the cantilever beam 5 to swing periodically. During this process, the piezoelectric sheet 4 will be deformed by force. The piezoelectric sheet 4 generates current through the piezoelectric effect. The generated current is stored in the energy storage module. The energy storage module is used to power the sensor module 01, the first single-chip microcomputer 02, and the wireless transmission module 03. The first single-chip microcomputer 02 and the wireless transmission module 03 can be installed in the device housing 1. The data collected by the sensor module 01 is sent to the first single-chip microcomputer 02. The first single-chip microcomputer 02 receives the data sent by the sensor module 01 and sends it out through the wireless transmission module 03 to monitor the safety of the highway bridge. By adopting the first piezoelectric vibration generator, the wind energy is used to independently power the highway bridge safety monitoring system, and there is no need to perform maintenance work such as battery replacement, saving a lot of manpower and material resources, which is suitable for small and medium-sized highway bridges with wide distribution and large number. Of course, it should be understood that in actual implementation, the number of settings of the above-mentioned highway bridge safety monitoring system can be selected according to the length of the highway bridge, such as setting them at one quarter, three quarters and three places in the middle of the span of the highway bridge.

[0036] In this embodiment, it also includes a second single-chip microcomputer 05, a display screen 06, a wireless receiving module 04 and a second power generation device, the display screen 06 and the wireless receiving module 04 are connected to the second single-chip microcomputer 05, the second power generation device has the same structure as the first power generation device, and the second single-chip microcomputer 05, the display screen 06 and the wireless receiving module 04 are connected to the energy storage module of the second power generation device. When this part is actually implemented, it is installed at both ends of the highway bridge.

[0037] The second power generation device has the same structure as the first power generation device, including a central rotating shaft and a device housing connected to the lower end of the central rotating shaft; a fixed support is arranged on the upper part of one end of the device housing, a cantilever beam is arranged on the fixed support, a piezoelectric sheet is fixed on one end of the cantilever beam close to the fixed support, and a windward blunt body is arranged on the other end of the cantilever beam; a tail rudder is arranged at the other end of the device housing; the piezoelectric sheet is connected to the energy storage module arranged in the device housing. The second power generation device also uses wind energy to independently power the second single-chip microcomputer, the display screen, and the wireless receiving module, without the need for maintenance work such as battery replacement, saving a lot of manpower and material resources. The wireless receiving module is used to receive the data sent by the wireless sending module, and send the received data to the second single-chip microcomputer. If the data received by the second single-chip microcomputer reaches the preset warning threshold, the second single-chip microcomputer sends a warning signal to the display screen, and the display screen displays the warning signal, so as to warn passing vehicles or people, reducing the accident rate of small and medium-sized highway bridges.

[0038] Preferably, the second single-chip microcomputer is preset with a warning threshold, and when the value of the data collected by the sensor module reaches 0.95 times, 1.05 times or 1.15 times the warning threshold, the display screen displays three different color indication signals, such as yellow light, orange light and red light, respectively, to monitor the safety status of the bridge in real time and achieve accurate warning.

[0039] The energy storage module is an LTC3588-1 chip, which has a filtering function and a voltage-stabilizing capacitor. The current generated by the piezoelectric sheet can be filtered and stored in the voltage-stabilizing capacitor. The circuit diagram is as follows: Figure 3 The specific wiring circuit is as shown in Figure 4 The voltage-stabilizing capacitor in the first power generation device is connected to the sensor module, the first single-chip microcomputer, and the wireless transmission module for power supply, and the voltage-stabilizing capacitor in the second power generation device is connected to the second single-chip microcomputer, the display screen, and the wireless receiving module for power supply. Figure 3 and Figure 4 The middle load refers to the sensor module, the first single chip microcomputer, the wireless transmission module or the second single chip microcomputer, the display screen, and the wireless receiving module.

[0040] In this embodiment, the central rotating shaft 1 includes an upper half shaft 11 and a lower half shaft 12, and the upper half shaft 11 and the lower half shaft 12 are connected by a rotating bearing 13. A mounting plate 14 is provided at the top of the upper half shaft 11, and the mounting plate 14 can be fixed on the bridge by screws, and the lower half shaft 12 is used to drive the device housing 2 to rotate as a whole.

[0041] In specific implementation, the sensor module 01 is a strain sensor, preferably a patch strain sensor, which is used to collect the strain of the highway bridge. The cross section of the windward bluff body 6 is one of a semicircular, rectangular, square, triangular, trapezoidal, and Y-shaped, and the cross section is preferably Y-shaped. The tail rudder 7 includes a support rod and a wing-shaped plate vertically arranged on the support rod. The support rod is connected to one end of the device housing 1. The tail rudder is installed at the rear end of the device housing, which can track the wind direction in real time and improve the utilization efficiency of wind energy.

[0042] Example 2

[0043] The difference between this embodiment and embodiment 1 is that the energy storage module structure is different. The energy storage module in this embodiment includes a rectifier filter circuit and a super capacitor. The piezoelectric sheet, rectifier filter circuit and super capacitor are connected in sequence. The circuit diagram is as follows: Figure 5 As shown. First, the current generated by the piezoelectric sheet is rectified and filtered by the rectifier and filter circuit, and then the electric energy is stored in the supercapacitor. The supercapacitor in the first power generation device is connected to the sensor module, the first single-chip microcomputer, and the wireless transmission module for power supply, and the supercapacitor in the second power generation device is connected to the second single-chip microcomputer, the display screen, and the wireless receiving module for power supply. Figure 5 The middle load refers to the sensor module, the first single chip microcomputer, the wireless transmission module or the second single chip microcomputer, the display screen, and the wireless receiving module.

[0044] Of course, in other embodiments, the energy storage module can also choose to use the LTC3588-1 chip and super capacitor, the LTC3588-1 chip realizes rectification and filtering, and the super capacitor replaces the voltage stabilizing capacitor in the LTC3588-1 chip. The circuit is similar to that in embodiment 1, except that the super capacitor replaces the voltage stabilizing capacitor.

[0045] In the specific implementation, both the first single-chip microcomputer and the second single-chip microcomputer can be MSP430 single-chip microcomputers, the sensor module can be HY-65B3000B patch strain sensor, and the display screen can be LED display screen. Welding can be used between the fixed support and the device housing, between the fixed support and the cantilever beam, and between the cantilever beam and the windward bluff body. Screws can also be used to connect between the fixed support and the cantilever beam, and between the cantilever beam and the windward bluff body.

[0046] The power generation principle of the first power generation device or the second power generation device is as follows:

[0047] The power generation device is installed at the bottom of the bridge through the central rotating shaft 1. In order to cope with the change of wind direction under the bridge, a tail rudder 7 is installed at the tail of the device housing 2. When wind blows and the tail rudder 7 is not parallel to the wind direction, the tail rudder 7 is affected by the wind and generates a rotational motion, and drives the entire power generation device to rotate around the rotating bearing 13 until the tail rudder 7 is parallel to the wind direction. The power generation device stabilizes, so that the windward bluff body 6 is perpendicular to the wind direction, so that the windward bluff body 6 faces the wind. The cantilever beam 5 can adopt a plate-like long strip structure. The wind flows around the windward bluff body 6. When the windward bluff body 6 and the cantilever beam 5 are arranged vertically, the wind will cause the windward bluff body 6 to vibrate and drive the cantilever beam 5 to vibrate horizontally. When the windward bluff body 6 and the cantilever beam 5 are arranged horizontally, the wind will cause the windward bluff body 6 to vibrate and drive the cantilever beam 5 to vibrate vertically. The piezoelectric sheet 4 fixed on the cantilever beam 5 is subjected to periodic pressure to generate electric charge, and the electric energy is stored in the capacitor after rectification and filtering by the energy storage module to power the system.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A highway bridge safety monitoring system, characterized in that: It includes a sensor module, a first single-chip microcomputer, a wireless transmission module and a first power generation device; The sensor module and the wireless transmission module are both connected to the first single chip computer; The first power generation device comprises a central rotating shaft and a device housing connected to the lower end of the central rotating shaft; a tail rudder is arranged at one end of the device housing; a fixed support is arranged at the upper part of the other end of the device housing, a cantilever beam is arranged on the side of the fixed support away from the tail rudder, a piezoelectric sheet is fixed at one end of the cantilever beam close to the fixed support, and a windward blunt body capable of galloping is arranged at the other end of the cantilever beam; the piezoelectric sheet is connected to an energy storage module arranged in the device housing; The sensor module, the first single-chip microcomputer, and the wireless transmission module are all connected to the energy storage module; It also includes a second single-chip microcomputer, a display screen, a wireless receiving module and a second power generation device, wherein the display screen and the wireless receiving module are connected to the second single-chip microcomputer, the second power generation device has the same structure as the first power generation device, and the second single-chip microcomputer, the display screen and the wireless receiving module are connected to the energy storage module of the second power generation device; The tail rudder comprises a support rod connected to one end of the device housing, and a wing-shaped plate vertically arranged on the support rod; The second single-chip computer has a preset warning threshold. When the value of the data collected by the sensor module reaches 0.95 times, 1.05 times or 1.15 times the warning threshold, the display screen displays indication signals in three different colors accordingly.

2. The highway bridge safety monitoring system according to claim 1, characterized in that: The energy storage module is an LTC3588-1 chip.

3. The highway bridge safety monitoring system according to claim 1, characterized in that: The energy storage module comprises a rectifier and filter circuit and a super capacitor, and the piezoelectric sheet, the rectifier and filter circuit and the super capacitor are connected in sequence.

4. The highway bridge safety monitoring system according to claim 1, characterized in that: The central rotating shaft comprises an upper half shaft and a lower half shaft, and the upper half shaft and the lower half shaft are connected via a rotating bearing.

5. The highway bridge safety monitoring system according to claim 4, characterized in that: A mounting plate is arranged on the top end of the upper half shaft.

6. The highway bridge safety monitoring system according to claim 1, characterized in that: The sensor module is a strain sensor.

7. The highway bridge safety monitoring system according to claim 1, characterized in that: The cross section of the windward bluff body is one of a semicircle, a rectangle, a square, a triangle, a trapezoid, and a Y shape.

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