Bridge disaster alarm system

Abstract

The invention provides a bridge disaster alarm system. The bridge disaster alarm system comprises a plurality of sensors, a main control device, an alarm device and a wireless communication device, each input end of the main control device is correspondingly connected with each sensor, a first output end of the main control device is connected with the alarm device, and a second output end of the main control device is connected with the wireless communication device; each sensor is used for detecting bridge state information and sending the detected bridge state information to the main control device; the main control device is used for determining whether a disaster occurs on the bridge according to the bridge state information detected by each sensor; if a disaster is detected, alarm information is sent to an alarm device for alarming, disaster information is sent to a wireless communication device, and the disaster information is sent to an upper computer through the wireless communication device. The bridge state information is collected, research and judgment are directly carried out at the front end, an alarm is given immediately, and the flexibility of the system and the timeliness of the alarm are improved.

Description

Technical Field

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

[0002] Under the threat of sudden natural disasters such as mountain torrents, mud and rock flows, and landslides, bridge safety accidents occur frequently, causing a large amount of irreversible loss of life and property. The importance of bridge health management and safety warning is obvious.

[0003] In the existing technology, the long-term structural stress condition of the bridge is usually monitored, and the slight changes in the stress and displacement of the bridge are collected. The data is uploaded to the monitoring background, and the data is analyzed and studied to evaluate the health of the bridge in normal use. After the data is transmitted to the server, it still needs to be comprehensively judged by experts or calculated by algorithms. After the health of the bridge is obtained, it is confirmed on the spot. When sudden disasters such as mountain torrents and landslides occur, the bridge is suddenly destroyed and it is impossible to immediately warn, which delays the implementation of emergency work. Summary of the invention

[0004] The embodiment of the present invention provides a bridge disaster warning system to solve the problem that an immediate warning cannot be issued when a bridge is suddenly damaged, thus delaying the implementation of emergency work.

[0005] In a first aspect, an embodiment of the present invention provides a bridge disaster warning system, comprising: a plurality of sensors, a main control device, an alarm device and a wireless communication device; Each input end of the main control device is connected to each corresponding sensor, the first output end of the main control device is connected to the alarm device, and the second output end of the main control device is connected to the wireless communication device; Each sensor is used to detect bridge status information and send the detected bridge status information to the main control device; The main control device is used to determine whether a disaster has occurred on the bridge based on the bridge status information detected by each sensor; if a disaster is detected, an alarm message is sent to the alarm device to issue an alarm, and the disaster information is sent to the wireless communication device, and the disaster information is sent to the host computer via the wireless communication device.

[0006] Optionally, the alarm information is multi-level alarm information; determining whether a disaster has occurred on the bridge based on the bridge status information detected by each sensor includes: Determine whether a disaster has occurred on the bridge based on the bridge status information detected by each sensor; If a disaster occurs, the disaster level is determined and the alarm information is determined based on the disaster level.

[0007] Optionally, the alarm device includes: an audible and visual alarm and a display screen; The sound and light alarm is used to send out sound and light alarms according to the alarm information; wherein, corresponding to the alarm information of different levels, the sound and light alarms sent out by the sound and light alarm are different; The display screen is used to determine the alarm level according to the alarm information and display it.

[0008] Optionally, the disaster information is bridge status information detected by various sensors within a preset time period before and after the disaster is detected.

[0009] Optionally, the bridge disaster warning system further includes: a power supply device; The input end of the power supply device is used to connect to an external power source, and the output end of the power supply device is used to supply power to each sensor and the main control device.

[0010] Optionally, the power supply device includes: a UPS and a voltage conversion module; The input end of the UPS is connected to the input end of the power supply device, and the output end of the UPS is connected to the input end of the voltage conversion module; The first output terminal of the voltage conversion module is used to supply power to each sensor; The second output end of the voltage conversion module is used to supply power to the main control device.

[0011] Optionally, the wireless communication device is also used to receive manual alarm information sent by a user, and send the manual alarm information to the main control device; The main control device is also used to generate alarm information according to the manual alarm information and send it to the alarm device for alarming.

[0012] Optionally, the bridge disaster warning system further includes: a video capture device; The video capture device is connected to the main control device; The main control device is also used to send a capture signal to the video capture device when a disaster is detected; The video capture device is used to start capturing bridge images when receiving a capture signal, and send the captured bridge images to the main control device, and send them to the host computer through the wireless communication device.

[0013] Optionally, the main control device is also used to perform a self-check when it detects that the system is powered on, and send the self-check information to the host computer via the wireless communication device.

[0014] Optionally, the multiple sensors include: one or more of: temperature and humidity sensors, displacement sensors, two-axis inclination sensors, static levels, vibrating string sensors, cable acceleration pickups, and single-axis or three-axis acceleration sensors.

[0015] The embodiment of the present invention provides a bridge disaster warning system, including: multiple sensors, a main control device, an alarm device and a wireless communication device; each input end of the main control device is respectively connected to each sensor, the first output end of the main control device is connected to the alarm device, and the second output end of the main control device is connected to the wireless communication device; each sensor is used to detect bridge status information, and send the detected bridge status information to the main control device; the main control device is used to determine whether a disaster occurs on the bridge according to the bridge status information detected by each sensor; if a disaster is detected, the alarm information is sent to the alarm device for alarm, and the disaster information is sent to the wireless communication device, and the disaster information is sent to the host computer through the wireless communication device. In the embodiment of the present invention, the bridge status information is collected by the sensor, and the main control device at the front end is directly analyzed and judged, and an alarm is immediately issued, which improves the flexibility of the system and the timeliness of the alarm. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 It is a structural schematic diagram of a bridge disaster warning system provided by an embodiment of the present invention; Figure 2 It is a structural schematic diagram of another bridge disaster warning system provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0018] In order to enable people in the technical field to better understand the present solution, the technical solution in the embodiment of the present solution will be clearly described below in conjunction with the drawings in the embodiment of the present solution. Obviously, the described embodiment is an embodiment of a part of the present solution, not all of the embodiments. Based on the embodiments in the present solution, all other embodiments obtained by ordinary technicians in the field without creative work should fall within the scope of protection of the present solution.

[0019] The term "including" and any other variations in the specification and claims of this solution and the above drawings mean "including but not limited to", and is intended to cover non-exclusive inclusions and is not limited to the examples listed in the text. In addition, the terms "first" and "second" are used to distinguish different objects, not to describe a specific order.

[0020] The following is a detailed description of the implementation of the present invention in conjunction with the specific drawings: Figure 1A schematic diagram of the structure of a bridge disaster warning system provided by an embodiment of the present invention. Figure 1 , the bridge disaster warning system includes: a plurality of sensors 1, a main control device 2, an alarm device 3 and a wireless communication device 4; Each input end of the main control device 2 is connected to each corresponding sensor 1, the first output end of the main control device 2 is connected to the alarm device 3, and the second output end of the main control device 2 is connected to the wireless communication device 4; Each sensor 1 is used to detect bridge status information and send the detected bridge status information to the main control device 2; The main control device 2 is used to determine whether a disaster has occurred on the bridge based on the bridge status information detected by each sensor 1; if a disaster is detected, an alarm message is sent to the alarm device 3 to issue an alarm, and the disaster information is sent to the wireless communication device 4, and the disaster information is sent to the host computer through the wireless communication device 4.

[0021] In the embodiment of the present invention, multiple sensors 1 monitor the state of the bridge, and the main control device 2 is directly set at the front end. According to the bridge state information detected by each sensor 1, the overall state of the bridge is quickly evaluated and disaster assessment is performed. There is no need to send data to the back end, and it does not rely on the network and other equipment. When a disaster occurs, an alarm can be issued in time, which improves the timeliness of the alarm and facilitates the staff to take corresponding countermeasures immediately. At the same time, the cost is low, the data collection accuracy is high, the influence of the natural environment is minimal, and the installation is convenient and quick.

[0022] Specifically, refer to Figure 2 The main control device 2 may include components such as analog quantity acquisition circuit, digital quantity acquisition circuit, single chip microcomputer, lightning arrester, etc., and may also include storage chip, DC / DC chip or other components.

[0023] The analog quantity acquisition circuit is used to process the analog signal acquired by the sensor 1; for example, an operational amplifier, an A / D chip; The digital quantity acquisition circuit is used to process the digital signal collected by the sensor 1; for example, RS485 can receive RS-485 digital signals output by no less than 31 channels (which can be expanded to no less than 500 channels through multiple RS-485 hubs) of sensors to facilitate data processing and long-distance transmission; illustratively, each sensor 1 can be connected to the digital acquisition circuit through an EDG terminal and a transmission line.

[0024] The single chip microcomputer is used for control and data processing; for example, disaster assessment is performed based on the data and analysis results of sensor 1; the time interval for scheduled collection is set; the edge computing capability is used to filter the collected digital signals, extract and store useful information, complete the fusion analysis of multi-sensor data, and issue alarm information and disaster information.

[0025] The storage chip is used to store data collected by each sensor 1 and other data; DC / DC chips are used for DC voltage conversion to provide power for other chips or modules.

[0026] Specific reference Figure 2 , other components will not be described in detail here.

[0027] Furthermore, the wireless communication device 4 may include: a 4G / 5G chip and an antenna; The 4G / 5G chip can realize the communication between the main control device 2 and the host computer (for example, the monitoring host of the monitoring center and / or the mobile phone of the designated inspection personnel), and the alarm information can be uploaded in time.

[0028] In a possible implementation, the alarm information may be multi-level alarm information; determining whether a disaster occurs on the bridge according to the bridge status information detected by each sensor 1 may include: 1. Determine whether a disaster has occurred on the bridge based on the bridge status information detected by each sensor 1; 2. If a disaster occurs, determine the disaster level and determine the alarm information based on the disaster level.

[0029] In the embodiment of the present invention, multi-level alarm information can be set so that users can intuitively understand the disaster situation.

[0030] For example, it can be divided into three levels of warning values. When the measured value exceeds the threshold, the alarm device 3 is triggered to issue an alarm of the corresponding level.

[0031] In one possible implementation, reference Figure 2 , the alarm device 3 may include: an audible and visual alarm and a display screen; The sound and light alarm is used to send out sound and light alarms according to the alarm information; wherein, corresponding to the alarm information of different levels, the sound and light alarms sent out by the sound and light alarm are different; The display screen is used to determine the alarm level according to the alarm information and display it.

[0032] Among various alarm forms, on-site sound and light alarms are particularly important. Therefore, in the embodiment of the present invention, a sound and light alarm is provided for sound and light alarm, and a display screen is combined for multi-dimensional early warning, which can improve the credibility of early warning information and greatly enhance the early warning effect. It should be noted that a relay can be provided in the power supply path of the sound and light alarm, and the relay receives and responds to the alarm information (switch signal) to power the sound and light alarm, thereby enabling the sound and light alarm to work according to a predetermined working mode.

[0033] Specifically, the sound and light alarm is composed of a flashing light and a speaker, and has the functions of high-brightness flashing and loud audio alarm. Specifically, the sound and light alarm can be arranged at equal distances on both sides of the bridge along the bridge direction, and the display screen can be set at both ends of the bridge head to issue safety warnings to passing drivers and pedestrians, which has the characteristics of short response time, easy installation, and simple signal transmission.

[0034] More specifically, the flash light can have three light colors and the speaker can have three voice playback contents to distinguish the alarm levels; for example, yellow represents a level one alarm, and the speaker broadcasts "level one reminder alarm"; orange represents a level two alarm, and the speaker broadcasts "level two serious alarm"; red represents a level two alarm, and the speaker broadcasts "level three danger warning".

[0035] Exemplarily, a two-axis inclination sensor collects the inclination of a bridge pier, and the angle value is transmitted to a single-chip microcomputer in the form of a digital signal. The single-chip microcomputer stores the digital signal and determines the angle size; for example, if the threshold is exceeded by 1 degree, a first-level alarm message is issued (relay first-level switch quantity); if the threshold is exceeded by 2 degrees, a second-level alarm message is issued (relay second-level switch quantity); if the threshold is exceeded by 3 degrees, a third-level alarm message is issued (relay third-level switch quantity).

[0036] Exemplary, reference Figure 2 The display screen and the main control device 2 can be connected via Ethernet. The main control device 2 can also include: an Ethernet module, which is used to send alarm information to the display screen via Ethernet to display the disaster status.

[0037] The main control device 2 can also directly communicate with the display screen through the wireless communication device 4 to send alarm information.

[0038] In a possible implementation, the disaster information is bridge status information detected by each sensor 1 within a preset time period before and after the moment when the disaster is detected.

[0039] For example, the bridge status information within 5 seconds before and after the disaster occurs is obtained. The data volume is small, which reduces the transmission pressure, and at the same time, relevant information before and after the disaster can be effectively obtained.

[0040] In one possible implementation, reference Figure 2 , the bridge disaster warning system may further include: a power supply device 5; The input end of the power supply device 5 is used to be connected to an external power source, and the output end of the power supply device 5 is used to supply power to each sensor 1 and the main control device 2 .

[0041] In one possible implementation, reference Figure 2 , the power supply device 5 may include: a UPS and a voltage conversion module; The input end of the UPS is connected to the input end of the power supply device 5, and the output end of the UPS is connected to the input end of the voltage conversion module; The first output terminal of the voltage conversion module is used to supply power to each sensor 1; The second output terminal of the voltage conversion module is used to supply power to the main control device 2 .

[0042] In the embodiment of the present invention, the UPS is used for power supply. When the mains power is normal, the mains power is supplied through the UPS and charges the backup battery in the UPS at the same time. When the mains power is interrupted, the UPS immediately starts the backup battery and can continue to supply power. In the embodiment of the present invention, when an extreme disaster causes the external mains power supply to be interrupted, AC power is automatically output through a UPS with energy storage capability, and then converted into DC power by a voltage conversion module to power the sensor 1 and the main control device 2. The electric energy can support the continuous release of alarm information for no less than 30 minutes, thereby ensuring the stability and continuity of the system power supply, ensuring that the system can still work normally when a disaster occurs, supporting the uploading of alarm information and continuously driving the alarm device 3 to emit sound and light alarms, reminding passing vehicles to take emergency shelter.

[0043] Exemplarily, the output voltage of the voltage conversion module may be +12V.

[0044] In one possible implementation, reference Figure 2 , the wireless communication device 4 can also be used to receive the manual alarm information sent by the user, and send the manual alarm information to the main control device 2; The main control device 2 can also be used to generate alarm information according to the manual alarm information, and send it to the alarm device 3 for alarming.

[0045] When a sensor 1 fails or the preset threshold is unreasonable, the system may not be able to detect bridge disasters in time; the embodiment of the present invention can cooperate with manual inspections to receive manual alarm information sent by users (monitoring hosts in the monitoring center and / or mobile phones of designated inspectors), so as to facilitate timely alarm when on-site inspectors discover bridge disasters but the system does not alarm, thus forming a closed-loop alarm system and further improving the reliability of the alarm.

[0046] For example, when the staff or patrol personnel of the monitoring center find that the on-site environment or status of the bridge is abnormal but the system does not sound an alarm or the equipment self-test is abnormal, they send a number 1, 2 or 3 to the system wireless communication device 4 through the monitoring center host or mobile phone, and the main control device 2 makes corresponding first-level, second-level, and third-level alarm judgments, causing the sound and light alarm to issue a corresponding alarm.

[0047] In one possible implementation, reference Figure 2 ,The bridge disaster warning system may also include: a video capturing device; The video capture device is connected to the main control device 2; The main control device 2 is also used to send a capture signal to the video capture device when a disaster is detected; The video capture device is used to start capturing the bridge image when receiving the capture signal, and send the captured bridge image to the main control device 2, and send it to the host computer through the wireless communication device 4.

[0048] In order to obtain more on-site information when a disaster occurs, a video capture device can also be set up to start taking photos of the bridge when a disaster is detected, so as to obtain relevant video evidence in time and facilitate subsequent emergency work.

[0049] Specifically, when the video capture device is 4G / 5G communication, it can directly communicate with the main control device 2 through the wireless communication device 4. When the video capture device is Ethernet communication, it can communicate with the main control device 2 through Ethernet.

[0050] In a possible implementation, the main control device 2 may also be used for self-checking when detecting that the system is powered on, and sending the self-checking information to the host computer via the wireless communication device 4 .

[0051] Specifically, when the device is powered on, if the power supply voltage is abnormal (too high or too low), the corresponding fault alarm light of the device will light up automatically. When the device starts running, it automatically checks whether the wireless communication device 4 is normal (such as whether the 4G communication SIM card is communicating normally, etc.). If there is an abnormality, the corresponding fault alarm light of the device will light up automatically. When the device collects data from sensor 1, if no data can be collected, the corresponding fault alarm light of the device will light up automatically. After the device is powered on and the self-test is completed, the self-test results are reported to the server. If the device is connected to multiple sensors 1, when a sensor 1 fails and the port signal cannot be received, the device sends a fault message from the debug port and locates which sensor it is.

[0052] In a possible implementation, the multiple sensors 1 may include: one or more of a temperature and humidity sensor, a displacement sensor, a two-axis inclination sensor, a static level, a vibrating string sensor, a cable acceleration pickup, and a single-axis or three-axis acceleration sensor.

[0053] The contents monitored when judging bridge disasters mainly include bridge deformation, displacement, external force vibration, etc., and one or several targeted parameters are selected according to the bridge type or possible damage mode; for example, the displacement of the beam is selected for a simply supported beam, the vibration of the bridge cable is selected for a suspension bridge, the ambient temperature and humidity is selected for areas with abundant rainfall, and the inclination of the bridge piers is selected for mountainous areas, and then different sensors 1 are selected for monitoring according to different parameters.

[0054] Specifically, a) Temperature and humidity sensor, used for bridge site environment monitoring, the specific parameters are as follows: 1) Temperature range: -40℃~100℃; 2) Temperature resolution: 0.05℃; 3) Temperature accuracy: ±0.1℃; 4) Humidity range: 0~100%; 5) Humidity resolution: 0.5%; 6) Humidity accuracy: 1%; 7) Transmission method: RS-485.

[0055] b) Displacement sensor, used for bridge displacement monitoring, the specific parameters are as follows: 1) Measuring range: 0mm~100mm; 2) Accuracy: 1mm; 3) Resolution: 0.1mm; 4) Transmission method: RS-485.

[0056] c) Two-axis inclination sensor, used to monitor the inclination of structures such as piers, bridges, and bridge towers. The specific parameters are as follows: 1) Range: ±5°; 2) Resolution: 0.001°; 3) Accuracy: 0.003°; 4) Sensitivity: 0.025% FSR; 5) Zero point temperature coefficient: ±0.002° (-40°C ~ 85°C); 6) Shock resistance: 100g@11ms, triaxial and isotropic (half sine wave); 7) Vibration resistance: 10grms, 10Hz~100Hz; 8) Working temperature: -40℃~85℃; 9) Transmission method: RS-485.

[0057] d) Static level, used for monitoring dynamic deflection of bridges, the specific parameters are as follows: 1) Measuring range: 1000mm; 2) Accuracy: 0.2mm; 3) Resolution: 0.01mm; 4) Transmission method: RS-485.

[0058] e) Vibrating wire sensor, used for vibration monitoring, the specific parameters are as follows: 1) Measuring range: 3000με; 2) Sensitivity: 1με; 3) Nonlinearity: Linear ≤ 0.5% FSR; Polynomial: ≤ 0.1% FSR; 4) Transmission method: RS-485.

[0059] f) Cable acceleration vibration pickup, used for cable vibration monitoring, the specific parameters are as follows: 1) Sensitivity (V×S 2 / m):0.3; 2) Acceleration (m / s) 2 ):20; 3) Passband (Hz): 0.5~80; 4) Output load resistance (kΩ): ​​1000; 5) Transmission method: analog voltage signal.

[0060] g) Single-axis or triaxial acceleration sensor, used for bridge vibration monitoring, the specific parameters are as follows: 1) Test range: -2g~2g; 2) Frequency response: 0~120Hz, capable of measuring low frequency range to DC; 3) Non-linearity: 1%FS; 4) Lateral sensitivity: less than 1%; 5) Dynamic range: greater than 100dB; 6) Transmission method: analog voltage signal.

[0061] The types of sensors 1 include but are not limited to the above types, and the parameters of each sensor 1 can also be selected according to actual application requirements, and the specific parameters are not limited to the above embodiments.

[0062] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A bridge disaster warning system, characterized in that: include: Multiple sensors, main control devices, alarm devices and wireless communication devices; Each input end of the main control device is connected to each corresponding sensor, the first output end of the main control device is connected to the alarm device, and the second output end of the main control device is connected to the wireless communication device; Each sensor is used to detect bridge status information and send the detected bridge status information to the main control device; The main control device is used to determine whether a disaster has occurred on the bridge based on the bridge status information detected by each sensor; if a disaster is detected, an alarm message is sent to the alarm device for alarming, and the disaster information is sent to the wireless communication device, and the disaster information is sent to the host computer through the wireless communication device; The wireless communication device is also used to receive manual alarm information sent by a user, and send the manual alarm information to the main control device; The main control device is also used to generate the alarm information according to the manual alarm information, and send it to the alarm device for alarming.

2. The bridge disaster warning system according to claim 1, characterized in that: The alarm information is multi-level alarm information; the bridge status information detected by each sensor is used to determine whether a disaster has occurred on the bridge, including: Determine whether a disaster has occurred on the bridge based on the bridge status information detected by each sensor; If a disaster occurs, the disaster level is determined, and the alarm information is determined according to the disaster level.

3. The bridge disaster warning system according to claim 2, characterized in that: The alarm device comprises: an audible and visual alarm and a display screen; The sound and light alarm is used to issue a sound and light alarm according to the alarm information; wherein, corresponding to different levels of alarm information, the sound and light alarm issued by the sound and light alarm is different; The display screen is used to determine and display the alarm level according to the alarm information.

4. The bridge disaster warning system according to any one of claims 1 to 3, characterized in that: The disaster information is bridge status information detected by various sensors within a preset time period before and after the moment when the disaster is detected.

5. The bridge disaster warning system according to any one of claims 1 to 3, characterized in that: The bridge disaster warning system also includes: a power supply device; The input end of the power supply device is used to connect to an external power source, and the output end of the power supply device is used to supply power to each sensor and the main control device.

6. The bridge disaster warning system according to claim 5, characterized in that: The power supply device comprises: a UPS and a voltage conversion module; The input end of the UPS is connected to the input end of the power supply device, and the output end of the UPS is connected to the input end of the voltage conversion module; The first output terminal of the voltage conversion module is used to supply power to each sensor; The second output end of the voltage conversion module is used to supply power to the main control device.

7. The bridge disaster warning system according to any one of claims 1 to 3, characterized in that: The bridge disaster warning system also includes: a video capture device; The video capture device is connected to the main control device; The main control device is also used to send a capture signal to the video capture device when a disaster is detected; The video capture device is used to start capturing a bridge image when receiving the capture signal, and send the captured bridge image to the main control device, and send it to the host computer through the wireless communication device.

8. The bridge disaster warning system according to any one of claims 1 to 3, characterized in that: The main control device is also used to perform self-check when it is detected that the system is powered on, and send self-check information to the host computer through the wireless communication device.

9. The bridge disaster warning system according to any one of claims 1 to 3, characterized in that: The multiple sensors include: one or more of a temperature and humidity sensor, a displacement sensor, a two-axis tilt sensor, a static level, a vibrating string sensor, a cable acceleration pickup, and a single-axis or three-axis acceleration sensor.

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