Instant automatic alarm method for bridge overturning

Abstract

The invention discloses an instant automatic alarm method for bridge overturning, which is realized through an instant automatic alarm system for bridge overturning, and comprises a pull rope arranged on a bridge body, two ends of the pull rope are connected with alarm devices on a bridge abutment, and each alarm device comprises a shell. A power supply, a main controller, a tension sensor, a Beidou positioning module antenna and an NB-IoT module antenna are arranged in the device, and the main controller is provided with a Beidou positioning module connected with the Beidou positioning module antenna and an NB-IoT module connected with the NB-IoT module antenna. The main controller is connected with and obtains pull rope tension data and bridge body position data and then sends the pull rope tension data and the bridge body position data to the management platform through the NB-IoT module, and the management platform converts the pull rope tension data and the bridge body position data into alarm information and reports the alarm information to a bridge operation management unit. According to the invention, full coverage of bridge monitoring can be realized, and powerful guarantee can be provided for coping with emergencies and meeting temporary requirements.

Description

Technical Field

[0001] The invention relates to the technical field of bridge safety monitoring, and in particular to an instant automatic alarm method for bridge overturning. Background Art

[0002] By the end of 2023, there will be 1.0793 million highway bridges and 95.2882 million linear meters in my country, which provides great convenience for transportation. However, due to various factors, such as the passage of overloaded vehicles, natural disasters, design and construction defects, etc., bridge safety accidents occur from time to time. In order to ensure its safe operation, the highway management department has invested a lot of manpower and financial resources to regularly and irregularly inspect and monitor bridges, such as structural deformation monitoring, stress and strain monitoring, appearance and crack monitoring, and traffic load monitoring. The existing monitoring methods are expensive, costing hundreds of thousands or millions. Therefore, the monitoring of bridges is mostly concentrated on key bridges, and it is impossible to achieve full coverage of all bridge monitoring. Bridge overturning accidents often occur suddenly, and the consequences are very serious. The bridge lacks an early warning monitoring system for overturning. After the accident occurs, the bridge overturning danger information cannot be reported to the management department immediately, which can easily cause large casualties and bring serious consequences. Therefore, the development of a low-cost early warning monitoring system that can achieve full coverage of large, medium and small bridges has become one of the problems that need to be solved urgently. Summary of the invention

[0003] In order to solve the above problems, the present invention provides a lightweight, low-cost, and quickly deployable bridge overturning instant automatic alarm method, which can specifically adopt the following technical solutions: The instant automatic alarm method for bridge overturning of the present invention is realized by an instant automatic alarm system for bridge overturning, wherein: The instant automatic alarm system for bridge overturning includes a pull rope arranged on the bridge body and extending longitudinally, and both ends of the pull rope are respectively connected to alarm devices arranged on the abutments, and the alarm devices each include a shell, and a power supply, a main controller, a tension sensor, a Beidou positioning module antenna and an NB-IoT module antenna are arranged in the shell, the main controller is provided with a Beidou positioning module and an NB-IoT module, the Beidou positioning module antenna is connected to the Beidou positioning module, the NB-IoT module antenna is connected to the NB-IoT module, the main controller is connected to the tension sensor to obtain the pull rope tension data, the main controller is connected to the Beidou positioning module to obtain the bridge body position data, the main controller is connected to the NB-IoT module to send the pull rope tension data and the bridge body position data to the management platform, and the management platform converts the pull rope tension data and the bridge body position data into alarm information and reports it to the bridge operation and management unit; The instant automatic alarm method for bridge overturning includes: firstly, installing an instant automatic alarm system for bridge overturning on the target bridge body, then turning on the power of the alarm device, monitoring the tension of the pull rope through the tension sensor, when the tension of the pull rope exceeds the preset value, the main controller receives the pull rope tension data and the bridge body position data and sends them to the management platform, and then the management platform converts the pull rope tension data and the bridge body position data into alarm information and reports it to the bridge operation management unit.

[0004] The tension sensor is provided with a limit switch, and when the tension of the pull rope exceeds a set value, the limit switch is closed.

[0005] The main controller is provided with an on-off switch, and when the main controller receives the rope tension data transmitted by the tension sensor, the on-off switch is closed.

[0006] The bridge body is provided with a plurality of expansion bolts which are distributed at intervals in the horizontal direction, and the tails of the expansion bolts are all provided with ring sleeves.

[0007] The pull rope is arranged horizontally, the middle part of the pull rope passes through the ring, and the two ends of the pull rope are connected to the tension sensor and fixed by buckles.

[0008] The instant automatic alarm method for bridge overturning provided by the present invention is implemented by an instant automatic alarm system for bridge overturning with an ingenious structure and low cost. For a bridge with a span of 600m, the total cost of its monitoring device does not exceed 10,000 yuan, which greatly reduces the monitoring investment compared with the existing monitoring equipment that costs hundreds of thousands or millions. Due to its low cost, it can achieve full coverage of monitoring of large, medium and small bridges, and can provide strong guarantees for responding to emergencies and meeting temporary needs; it is responsive, safe and reliable, and can send abnormal situations to the bridge management department in a relatively short time, thereby gaining valuable time for subsequent emergency treatment and improving the safety and risk prevention capabilities of infrastructure. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural schematic diagram of the instant automatic alarm system for bridge overturning of the present invention.

[0010] Figure 2 yes Figure 1 Enlarged view of the alarm device in part A.

[0011] Figure 3 yes Figure 1 Schematic diagram of circuit connection of alarm device.

[0012] Figure 4 yes Figure 1 Control block diagram of the alarm device. DETAILED DESCRIPTION

[0013] The following is a detailed description of an embodiment of the present invention in conjunction with the accompanying drawings. This embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation method and a specific working process are given, but the protection scope of the present invention is not limited to the following embodiment.

[0014] like Figure 1-4 As shown, the instant automatic alarm method for bridge overturning described in the present invention is realized by an instant automatic alarm system for bridge overturning, which includes a pull rope 2 (usually a steel wire rope) arranged on the bridge body 1 and extending longitudinally, and both ends of the pull rope 2 are respectively connected to an alarm device 4 arranged on the abutment 3.

[0015] Each alarm device includes a shell 41, in which a power supply 42, a main controller 43, a tension sensor 44, a Beidou positioning module antenna 45 and a NB-IoT module antenna 46 are arranged. Among them, the main controller 43 is provided with a Beidou positioning module 47 and a NB-IoT module 48, the Beidou positioning module 47 is connected to the Beidou positioning module antenna 45, the NB-IoT module 48 is connected to the NB-IoT module antenna 46, the main controller 43 is connected to the tension sensor 44 to obtain the rope tension data, the main controller 43 is connected to the Beidou positioning module 47 to obtain the bridge position data, the controller 43 is connected to the NB-IoT module 48 to send the rope tension data and the bridge position data to the management platform, and the management platform converts the rope tension data and the bridge position data into alarm information and reports it to the bridge operation management unit.

[0016] Preferably, the tension sensor 44 is provided with a limit switch 5, and when the tension of the pull rope exceeds the set value, the limit switch 5 is closed. The main controller 43 is provided with an on-off switch 6, and when the main controller 43 receives the pull rope tension data transmitted by the tension sensor 44, the on-off switch 6 is closed. The above-mentioned setting of the limit switch 5 and the on-off switch 6 can reduce the power consumption of the alarm device, so that it can operate for a long period of time, thereby ensuring the monitoring effect.

[0017] The instant automatic alarm method for bridge overturning includes: firstly, installing an instant automatic alarm system for bridge overturning on the target bridge body, then turning on the power supply 42 of the alarm device, monitoring the tension of the pull rope 2 through the tension sensor 44, and when the tension of the pull rope 2 exceeds the preset value, the main controller 43 receives the pull rope tension data and the bridge body position data and sends them to the management platform, and then the management platform converts the pull rope tension data and the bridge body position data into alarm information and reports it to the bridge operation management unit.

[0018] During construction, the above-mentioned bridge overturning instant automatic alarm system is installed according to the following steps: Step 1: Install the expansion bolts 7, which are located on the side of the bridge body 1 of each span of the bridge. Each expansion bolt 7 has a collar at its tail, and the axis connecting lines of the collars are at the same height; The second step is to open mounting holes on the fixed structures such as the abutments 3 at both ends of the bridge, the mounting holes and the expansion bolts 7 are arranged on the same side, and the two mounting holes are at the same height; The third step is to install an alarm device in each of the two mounting holes, and pass the pull rope 2 through the ring of the expansion bolt 7 in sequence, and connect the two ends of the pull rope 2 to the tension sensor 44 of the alarm device. The pull rope 2 is passed through the mounting hole of the tension sensor 44 and fixed by the buckle 8; Step 4: Adjust the length of the pull rope 2 to make the pull rope 2 slightly tight, and apply a certain horizontal force to the tension sensor 44; The fifth step is to power on and test the alarm device. If the test is successful, the installation is completed.

[0019] After the above-mentioned bridge overturning instant automatic alarm system is installed, the power supply 42 can be turned on to perform daily monitoring of the bridge status. When the bridge is within the safe range, the rope tension data detected by the tension sensor 44 is less than the preset value. At this time, the limit switch 5 is disconnected, and the system continues to monitor in a low-energy state; once the bridge overturns or other unexpected situations occur, the bridge body 1 will be twisted, broken, etc., and the rope 2 connected thereto will be quickly tightened. The tension sensor 44 detects that the rope tension data increases rapidly. When the preset value is reached, the limit switch 5 is closed, and the main controller 43 starts to work and receives the rope tension data. At this time, the opening and closing switch 6 is closed, and the bridge position data is received through the Beidou positioning module 47 and the Beidou positioning module antenna 45. After that, the rope tension data and the bridge position data are sent to the management platform by the NB-IoT module 48, and the management platform converts the rope tension data and the bridge position data into alarm information and reports it to the bridge operation management unit, thereby providing emergency support for the accident bridge.

[0020] Embodiment 1: A prestressed concrete (post-tensioned) small box girder bridge was built in a certain place, with a total of 15 spans, each span is 40m long, and the bridge deck width is 47m. Because it is located in a mountainous area with a dangerous terrain and a relatively large traffic volume, it is planned to install a bridge operation monitoring system on it so that when an accident occurs, the dangerous situation can be grasped in time, and support and on-site processing can be carried out. After comparing the investment amount and device performance, it was finally decided to install a set of bridge overturning instant automatic alarm system described in the present invention on the bridge.

[0021] During installation, follow the following steps: ① Perform line measurement on the bridge body 1 on one side of the bridge, and install expansion bolts 7 with a specification of M6*100, which are arranged in a straight line. The tail of each expansion bolt 7 is provided with a collar, and the axis connecting lines of each collar are at the same height. ② Open installation holes on the fixed structures such as the abutments 3 at both ends of the bridge, which are set on the same side as the expansion bolts 7, and the two installation holes are at the same height. ③Install one alarm device of the present invention in each of the two mounting holes, then select a steel wire rope with a diameter of 5mm and a length of 604m as the pull rope 2, and use the buckle 8 to fix one end of the pull rope 2 to the tension sensor 44 of one of the alarm devices, then pull the pull rope 2 through the tail ring of the expansion bolt 7 on the bridge body 1 in turn, and then use the buckle 8 to connect the pull rope 2 to the tension sensor 44 of another alarm device, and then adjust the tightness of the pull rope 2 to make the pull rope 2 slightly taut, and then adjust the buckle 8 again to fix the pull rope 2 to the second tension sensor 44. At this time, the pull rope 2 applies a horizontal force of about 1KN (less than the preset value of the tension sensor 44) to the tension sensors 44 at both ends. ④ Set the alarm preset value of the tension sensor 44 to 5KN. If the bridge body 1 is deformed, the tension of the rope 2 will change accordingly. When the tension reaches 5KN, the on-off switch 6 is closed, and the bridge position data is received through the Beidou positioning module 47 and the Beidou positioning module antenna 45. After that, the NB-IoT module 48 sends the rope tension data and the bridge position data to the management platform. The management platform converts the rope tension data and the bridge position data into alarm information and reports it to the bridge operation management unit, thereby providing emergency support for the accident bridge.

[0022] Two sets of bridge overturning instant automatic alarm systems can also be installed on the same bridge, one on each side of the bridge body, to more accurately capture bridge deformation information and issue early warning signals in a timely manner.

[0023] It should be noted that, in the description of the present invention, terms indicating orientation or positional relationships, such as "front", "rear", "left", "right", "vertical", "horizontal", "inside", "outside", etc., are based on the orientation or positional relationships shown in the drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

Claims

1. A bridge overturning instant automatic alarm method, which is implemented by a bridge overturning instant automatic alarm system, characterized in that: The instant automatic alarm system for bridge overturning includes a pull rope arranged on the bridge body and extending longitudinally, and both ends of the pull rope are respectively connected to alarm devices arranged on the abutments, and the alarm devices each include a shell, and a power supply, a main controller, a tension sensor, a Beidou positioning module antenna and an NB-IoT module antenna are arranged in the shell, the main controller is provided with a Beidou positioning module and an NB-IoT module, the Beidou positioning module antenna is connected to the Beidou positioning module, the NB-IoT module antenna is connected to the NB-IoT module, the main controller is connected to the tension sensor to obtain the pull rope tension data, the main controller is connected to the Beidou positioning module to obtain the bridge body position data, the main controller is connected to the NB-IoT module to send the pull rope tension data and the bridge body position data to the management platform, and the management platform converts the pull rope tension data and the bridge body position data into alarm information and reports it to the bridge operation and management unit; The instant automatic alarm method for bridge overturning includes: firstly, installing an instant automatic alarm system for bridge overturning on the target bridge body, then turning on the power of the alarm device, monitoring the tension of the pull rope through the tension sensor, when the tension of the pull rope exceeds the preset value, the main controller receives the pull rope tension data and the bridge body position data and sends them to the management platform, and then the management platform converts the pull rope tension data and the bridge body position data into alarm information and reports it to the bridge operation management unit.

2. The instant automatic alarm method for bridge overturning according to claim 1 is characterized by: The tension sensor is provided with a limit switch, and when the tension of the pull rope exceeds a set value, the limit switch is closed.

3. The instant automatic alarm method for bridge overturning according to claim 1 is characterized by: The main controller is provided with an on-off switch, and when the main controller receives the rope tension data transmitted by the tension sensor, the on-off switch is closed.

4. The instant automatic alarm method for bridge overturning according to claim 1 is characterized by: The bridge body is provided with a plurality of expansion bolts which are distributed at intervals in the horizontal direction, and the tails of the expansion bolts are all provided with ring sleeves.

5. The instant automatic alarm method for bridge overturning according to claim 4 is characterized by: The pull rope is arranged horizontally, the middle part of the pull rope passes through the ring, and the two ends of the pull rope are connected to the tension sensor and fixed by buckles.

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