Bridge tunnel structure safety monitoring edge gateway based on ARM architecture

Abstract

The invention discloses a bridge tunnel structure safety monitoring edge gateway based on an ARM architecture. The edge gateway comprises an integrated control board, a power supply module, an interface module, a communication module and a shell. Through cooperation of the integrated control board, the power supply module, the interface module and the communication module, a low-power-consumption embedded ARM architecture is used, and the power supply module provides a comprehensive power supply mode of commercial power, solar energy and a battery; the interface module provides a plurality of sensor signal acquisition units commonly used for safety monitoring of bridge and tunnel structures, is pluggable, and can be adjusted according to monitoring scenes. The communication module provides multiple modes of wired and wireless networking, so that the equipment can meet the functional requirements of bridge and tunnel safety monitoring in different scales and environments, provides a more flexible networking power supply mode, reduces repeated power supply and network supply of the signal conversion acquisition card, has efficient edge end computing power, and improves the safety of bridge and tunnel safety monitoring. And a computing device which is more stable and higher in adaptability is provided for bridge and tunnel safety monitoring.

Description

Technical Field

[0001] The present invention belongs to the technical field of bridge and tunnel structure safety monitoring, and in particular relates to an ARM architecture-based bridge and tunnel structure safety monitoring edge gateway. Background Art

[0002] With the development of urban infrastructure, bridges and tunnels play an increasingly important role in urban transportation construction. However, the safety and stability issues of bridges and tunnels are becoming increasingly prominent. In order to effectively ensure the safe operation of bridges and tunnels, the realization of real-time monitoring and early warning of bridges and tunnels has become an urgent problem to be solved.

[0003] As more and more small and medium-sized bridges or tunnels in remote areas have been operating for longer years, structural safety issues have become more prominent. However, the bridge and tunnel environment in remote areas is harsh, and there is usually no supply of city electricity or network supporting projects. Edge-end equipment that does not rely on traditional central computer rooms such as city electricity and dedicated network is needed to complete long-term monitoring of bridges and tunnels.

[0004] Currently, a large amount of monitoring data needs to be processed through traditional centralized processing methods before real-time monitoring of bridges and tunnels can be achieved. However, this processing method has problems such as large data transmission delay and insufficient computing power, which makes it difficult to meet the needs of real-time monitoring.

[0005] Therefore, we need to propose an ARM-based edge gateway for bridge and tunnel structure safety monitoring to solve the above-mentioned problems, so that it can be suitable for multi-source signal acquisition and conversion for bridge and tunnel structure safety monitoring, and edge computing devices with multiple power supply methods and multiple network access methods can realize long-term monitoring of the structural safety of bridges and tunnels, improve the efficiency of bridge and tunnel monitoring construction and adaptability to various harsh environments. Summary of the invention

[0006] The purpose of the present invention is to provide an ARM architecture-based bridge and tunnel structure safety monitoring edge gateway suitable for various application scenario functions of bridge and tunnel structure safety monitoring business.

[0007] To achieve the above object, the present invention adopts the following technical solutions:

[0008] An ARM-based edge gateway for monitoring the safety of bridge and tunnel structures, comprising an integrated control board, a power module, an interface module, a communication module and a housing, wherein the integrated control board, the power module, the interface module and the communication module are all installed inside the housing, the power module is electrically connected to the integrated control board, the integrated control board is electrically connected to the interface module, and the interface module is electrically connected to the communication module;

[0009] The integrated control board is used to perform various bridge and tunnel monitoring signal acquisition, data persistence storage, edge computing analysis, data visualization and data download;

[0010] The power module is used to provide continuous and stable power output for the entire device and the connected sensors;

[0011] The interface module is configured as a pluggable component for accessing various sensor signals for monitoring bridges and tunnels, and converting and collecting the signals;

[0012] The communication module is a pluggable component used to provide wired or wireless multi-type network communication services to the outside world;

[0013] The housing is used to protect the internal electronic components and to prevent dust and water in outdoor environments, providing support for adapting to the harsh environment of bridge and tunnel monitoring.

[0014] Preferably, the integrated control board includes an ARM processing unit, a memory unit, a storage unit and a storage expansion unit. The ARM processing unit includes an ARM processor with high performance and low power consumption. The memory unit is connected to the ARM processor via a high-speed bus. The storage unit is connected to the ARM processor via a high-speed interface. The storage expansion unit reserves an extended storage interface for the integrated control board to increase the long-term storage capacity of monitoring data according to actual business needs of bridge and tunnel monitoring scenarios.

[0015] Preferably, the storage unit is configured as a storage module with real-time efficient read and write speed and reliability to ensure fast access and long-term stable storage of real-time data;

[0016] The storage expansion unit provides expandable storage space to persistently retain monitoring data over a longer period of time.

[0017] Preferably, the power module includes a power control unit, a backup battery unit, a power excitation terminal unit and an expansion interface unit;

[0018] The power control unit is used to sample the battery voltage and current of the backup battery unit, monitor the battery status in real time, and perform protection control according to preset battery protection parameters;

[0019] The backup battery unit includes a lithium-ion battery with high energy density; the power excitation terminal unit is used to provide a power excitation signal for an external device;

[0020] The extended interface unit includes a solar panel, and the solar panel is charged and discharged by a power control unit, and the output signal of the power control unit is set as a PWM output signal.

[0021] Preferably, the power control unit is configured as a microcontroller of the STM32 series, and the power control unit is used to set charging parameters of the solar panel, and monitor and control the charging state of the solar panel through a software program.

[0022] Preferably, an ADC module is provided in the microcontroller, and the ADC module samples the battery voltage and current, monitors the battery status in real time, and can perform protection control according to preset battery protection parameters.

[0023] Preferably, at least one group of the power excitation terminal units is provided, and at least one group of the power excitation terminal units includes positive and negative poles, and the excitation voltage can be dynamically configured within the system. In actual application, multiple groups of power supply terminals with different voltages can be configured according to requirements.

[0024] Preferably, the interface module includes a pluggable vibrating wire signal acquisition unit, a current and voltage acquisition unit, a dynamic strain acquisition unit, a vibration signal acquisition unit and an RS485 / RS232 expansion unit;

[0025] The vibrating wire signal acquisition unit converts the vibrating wire strain signal of the vibrating wire strain sensor used in the bridge and tunnel monitoring process into a digital signal, and connects to the edge gateway for data acquisition, calculation and analysis;

[0026] The current and voltage acquisition unit converts the current and voltage signals of the universal current and voltage output sensors used in the bridge and tunnel monitoring process into digital signals, and connects to the edge gateway for data acquisition, calculation and analysis;

[0027] The dynamic strain acquisition unit collects and analyzes the instantaneous stress of the bridge strain in real time for the dynamic strain gauge used in the bridge monitoring process. The dynamic strain acquisition unit converts the dynamic strain signal into a digital signal and enters the edge gateway for collection, calculation and analysis.

[0028] The vibration signal acquisition unit converts the acceleration signal used in the bridge and tunnel monitoring process into a digital signal that can be recognized by the edge gateway system, and connects it to the calculation and analysis;

[0029] The RS485 / RS232 expansion unit is designed for bridge and tunnel monitoring processes that require access to the edge via a serial port, and supports secondary application development of extended sensors within the bridge and tunnel monitoring edge gateway application to ensure system scalability.

[0030] Preferably, the communication module includes a status indicator light, a wired network unit, a Wifi network unit, a 4G / 5G network unit and a LoRa network unit;

[0031] The status indicator light adopts the form of an LED light to indicate different states through different colors and flashing frequencies; the wired network unit is connected to the edge gateway using an RJ45 interface and a corresponding transmission cable; the Wifi network unit adopts wireless network technology to realize the communication between the edge gateway and other devices through the IEEE802.11 protocol; the 4G / 5G network unit adopts a communication module supporting 4G LTE and 5G NR to realize the connection between the edge gateway and the Internet; the LoRa network unit adopts low-power wide area network technology to realize long-distance, low-power data transmission; the wired network unit, Wifi network unit, 4G / 5G network unit and LoRa network unit are all pluggable.

[0032] Preferably, the status indicator light is set to multiple (4) LED indicator lights, and the 4 LED indicator lights are respectively a wired network indicator light, a Wifi communication indicator light, a 4G / 5G communication indicator light, and a LoRa communication indicator light.

[0033] The ARM processing unit, memory unit, storage unit in the integrated control board of the invention, the power control unit, backup battery unit, power excitation terminal unit in the power module, the vibrating string signal acquisition unit, current and voltage acquisition unit, dynamic strain acquisition unit, vibration signal acquisition unit and RS485 / RS232 expansion unit in the port module are key components, and the key components are electrically connected in sequence.

[0034] The invention relates to an edge gateway device based on ARM architecture, which is used to realize the data collection, processing, storage and communication functions of IoT devices. The key components of the invention include an integrated control board, a power module and an interface module. These key components are electrically connected in sequence, solving some technical difficulties and problems existing in the prior art.

[0035] First, the traditional bridge and tunnel structure safety monitoring system often requires the deployment of a large number of sensors and data acquisition equipment, which not only increases the cost of the system, but also increases the complexity and maintenance difficulty of the equipment. The key components of the integrated control panel in the present invention can realize multiple data acquisition functions, thereby simplifying the system structure and deployment process, and reducing the system cost and maintenance difficulty.

[0036] Secondly, the ARM processing unit and memory unit used in the present invention have the characteristics of high performance and low power consumption, which can improve the operating efficiency and stability of the system and reduce the system energy consumption. At the same time, the storage unit can store a large amount of monitoring data and system configuration information, which is convenient for users to manage and maintain the system.

[0037] In addition, the power module in the present invention can ensure the stable power supply of the system, and the backup battery unit is used as a backup power supply to ensure the normal operation of the system in emergencies such as power outages. The power excitation terminal unit can provide the sensor with a driving voltage and an excitation signal, thereby achieving accurate data collection.

[0038] Finally, the interface module in the present invention includes a variety of data acquisition units and RS485RS232 expansion units, which can realize the collection and transmission of a variety of monitoring indicators, including vibrating wire signals, current and voltage, dynamic strain and vibration signals, etc. These data acquisition units can realize high-precision and high-stability data collection, while the RS485 / RS232 expansion unit can realize remote transmission of data and interface expansion, thereby improving the flexibility and scalability of the system.

[0039] In summary, the design scheme of connecting key components in the present invention solves some technical difficulties and problems existing in the traditional bridge and tunnel structure safety monitoring system, and realizes the characteristics of system simplification, high efficiency, stability and scalability.

[0040] The present invention has the following significant technical advances:

[0041] Improved integration: By integrating the ARM processing unit, memory unit, and storage unit on the integrated control board, the system integration is improved, the equipment size is reduced, and installation and maintenance are facilitated.

[0042] Stable and reliable power supply: The power module includes a power control unit, a backup battery unit and a power excitation terminal unit, which provide stable and reliable power supply for key components and ensure the normal operation of the equipment under various working conditions.

[0043] Rich data acquisition functions: The interface modules include vibrating string signal acquisition unit, current and voltage acquisition unit, dynamic strain acquisition unit, vibration signal acquisition unit and RS485 / RS232 expansion unit, which support multiple sensor access to meet the data acquisition needs of different application scenarios.

[0044] High-performance data processing: The processing unit (11) based on the ARM architecture has the characteristics of low power consumption and high performance, and can process large amounts of data in real time, thereby improving data processing efficiency.

[0045] Flexible communication expansion: RS485 / RS232 expansion unit (35) provides a flexible communication interface to facilitate data exchange with other devices.

[0046] Therefore, the present invention proposes an innovative edge gateway solution for bridge and tunnel structure safety monitoring, which has high practicality and economic benefits, can effectively solve some problems and difficulties existing in the prior art, and has broad application prospects and market value.

[0047] Compared with the prior art, the present invention has the following advantages:

[0048] The present invention uses a low-power embedded ARM architecture through the cooperation of an integrated control board, a power module, an interface module and a communication module. The power module provides a comprehensive power supply mode of AC power, solar energy and battery; the interface module provides a variety of sensor signal acquisition units commonly used for bridge and tunnel structure safety monitoring, and supports pluggable and can be adjusted according to the monitoring scenario; the communication module provides a variety of wired and wireless networking methods, so that the device can meet the functional requirements of bridge and tunnel safety monitoring of different scales and environments, provide a more flexible networking power supply mode, reduce the repeated power supply of the signal conversion and acquisition card, and provide efficient edge computing capabilities, so as to provide a more stable and adaptable computing device for bridge and tunnel safety monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 This is a schematic diagram of the structure of an edge gateway for bridge and tunnel structure safety monitoring based on ARM architecture;

[0050] Figure 2 It is a structural schematic diagram of an integrated control panel;

[0051] Figure 3 It is a structural schematic diagram of a power module;

[0052] Figure 4 is a structural schematic diagram of an interface module;

[0053] Figure 5 The figure is a schematic diagram of the structure of a communication module.

[0054] In the figure: 1. Integrated control board; 11. ARM processing unit; 12. Memory unit; 13. Storage unit; 14. Storage expansion unit; 2. Power module; 21. Power control unit; 22. Backup battery unit; 23. Power excitation terminal unit; 24. Extension interface unit; 3. Interface module; 31. Vibration string signal acquisition unit; 32. Current and voltage acquisition unit; 33. Dynamic strain acquisition unit; 34. Vibration signal acquisition unit; 35. RS485 / RS232 expansion unit; 4. Communication module; 41. Status indicator light; 42. Wired network unit; 43. Wifi network unit; 44. 4G / 5G network unit; 45. LoRa network unit; 5. Casing. DETAILED DESCRIPTION

[0055] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0056] The mainstream bridge and tunnel health monitoring systems in the market currently have a wide variety of equipment, such as current and voltage signal conversion equipment and vibrating string signal conversion equipment for signal conversion, DTU acquisition equipment for signal transmission, and industrial computer equipment for data analysis. The bridge and tunnel structure safety monitoring system mainly relies on a single device terminal for data collection and processing, or sends data to a cloud center server for processing. This approach has limitations in application scenarios such as multi-device collaborative linkage control and various sensor devices in multiple spatial environments tracing spatial and temporal data synchronization at the same time.

[0057] At the same time, various types of terminal devices upload data to the cloud independently for processing, which has great limitations in terms of timeliness and network bandwidth dependence. For example, in some bridges or tunnels, when a sudden situation occurs and the network is weak or there is no network, the terminal device and the cloud server network cannot be connected, resulting in data loss during that period. This type of failure will pose a data risk if the monitored object needs to be analyzed in real time under special circumstances such as earthquakes and floods, and the impact of disasters on bridges and tunnels needs to be analyzed.

[0058] The terminal equipment interface module design of existing bridge and tunnel automation monitoring is relatively simple, usually only supporting the access of one or a few types of sensors, which limits the scalability and compatibility of the monitoring system.

[0059] The existing terminal equipment for bridge and tunnel automation monitoring mainly relies on AC power supply, without considering the unstable or interrupted power supply in complex environments. For example, at the construction site of a bridge or tunnel, the on-site environment does not have a complete wired power supply environment, which affects the stability and reliability of the bridge and tunnel monitoring system.

[0060] Existing products usually only support wired network environments, such as Ethernet, optical fiber, etc., and lack wireless transmission capabilities. At bridge and tunnel construction sites, optical fiber or wired networks may be damaged due to on-site construction. If the terminal acquisition equipment does not have wireless transmission methods, it will limit the deployment flexibility of the equipment in actual application scenarios.

[0061] Embodiment 1:

[0062] In order to solve the above problems, according to Figure 1 , Figure 2 , Figure 3 、 Figure 4 、 Figure 5As shown, an edge gateway for bridge and tunnel structure safety monitoring based on ARM architecture includes an integrated control board 1, a power module 2, an interface module 3, a communication module 4 and a shell 5. The integrated control board 1, the power module 2, the interface module 3 and the communication module 4 are all installed inside the shell 5. The power module 2 is electrically connected to the integrated control board 1, the integrated control board 1 is electrically connected to the interface module 3, and the interface module 3 is electrically connected to the communication module 4; the integrated control board 1 is used to perform various bridge and tunnel monitoring signal acquisition, data persistence storage, edge computing and analysis, data visualization and data download; the power module 2 is a pluggable structure setting, which is used to provide continuous and stable power output for the entire device and the connected sensors; the interface module 3 is set as a pluggable component, which is used to access various sensor signals for bridge and tunnel monitoring, and convert the signals into acquisition signals. , and a set of RS485 / 232 interfaces are provided to facilitate access to third-party sensor signals; the communication module 4 is a pluggable component used to provide wired or wireless multi-type network communication services to the outside, and can be pluggable and configured as needed according to the bridge and tunnel monitoring scenario; the housing 5 is used to protect its internal electronic components and dust and water resistance in outdoor environments. Four six-pin aviation plugs are provided at the bottom of the housing for integrated access of power cables, network cables, and signal cables to provide support for adapting to the harsh environment of bridge and tunnel monitoring; the integrated control board 1 includes an ARM processing unit 11, a memory unit 12, a storage unit 13, and a storage expansion unit 14. The ARM processing unit 11 includes an ARM processor with high performance and low power consumption. The ARM processor is a central processing unit (CPU) based on the ARM architecture, such as an ARM Cortex-A series processor, such as Cortex-A53 or Cortex-A72, which has the advantages of high performance and low power consumption and is suitable for edge computing scenarios. The ARM processor and other key components are integrated on a single printed circuit board (PCB) to facilitate wiring, heat dissipation, and maintenance. Provide appropriate power management and protection circuits for the ARM processor to ensure stable operation and prevent accidental damage. The memory unit 12 is connected to the ARM processor via a high-speed bus, and the storage unit 13 is set as a storage module with real-time efficient read and write speed and reliability to ensure fast access and long-term stable storage of real-time data. The memory unit 12 provides sufficient memory capacity for the ARM processor to meet the needs of real-time data processing and analysis, using LPDDR4 or LPDDR5 type memory. Select a memory module with a higher data transfer rate and lower power consumption characteristics to improve processing capabilities and reduce overall energy consumption. The memory module is connected to the ARM processor via a high-speed bus to provide lower latency and higher throughput. The storage unit 13 is connected to the ARM processor via a high-speed interface to provide flash memory for storing monitoring data and system files, such as using eMMC or UFS type storage. Select a storage module with higher read and write speeds and reliability to ensure fast access and long-term stable storage of real-time data.The storage module is connected to the ARM processor through a high-speed interface, such as using an SDIO or PCIe interface. The storage expansion unit 14 reserves an extended storage interface 15 for the integrated control board 1 to facilitate the actual business needs of the bridge and tunnel monitoring scenario to increase the long-term storage capacity of the monitoring data; for example, a microSD card slot or a SATA interface is provided. A flexible extended storage management system is designed to support storage devices of different types and capacities to meet the needs of various application scenarios. The storage expansion unit 14 provides expandable storage space, persists monitoring data for a longer time range, and provides appropriate power and signal protection for the extended storage to ensure stable operation and good compatibility. Such as. Figure 3As shown, the power module 2 includes a power control unit 21, a backup battery unit 22, a power excitation terminal unit 23 and an expansion interface unit 24; the power module can support multiple power supply modes, including but not limited to battery power supply, mains power supply, solar power supply, etc. The power control unit 21 is used to sample the battery voltage and current of the backup battery unit 22, monitor the battery status in real time, and can perform protection control according to preset battery protection parameters; the power control unit 21 is set as a microcontroller of the STM32 series, and the power control unit 21 is used to set the parameters of solar panel charging, and monitor and control the charging status of the solar panel through a software program. An ADC module is set in the microcontroller, and the ADC module samples the battery voltage and current, monitors the battery status in real time, and can perform protection control according to preset battery protection parameters; the backup battery unit 22 includes a high-energy-density lithium-ion battery, such as an 18650 battery. In order to ensure the safety and life of the battery, various protection measures such as overcharge, over-discharge, over-current, and short-circuit protection can be set in the power control unit 21 to ensure the safe and reliable operation of the backup battery; the power excitation terminal unit 23 is used to provide a power excitation signal for an external device, and at least one group of power excitation terminal units 23 is set, and at least one group of power excitation terminal units 23 includes positive and negative poles, and the excitation voltage can be dynamically configured in the system (such as 5V / 12V / 24V). In actual application, multiple groups of power supply terminals with different voltages can be configured according to needs; the power excitation terminal unit 23 can be used to provide a power excitation signal for an external device, such as a sensor, a communication module, etc. In the power control unit 21, the voltage, current and other parameters of the power excitation terminal can be set, and controlled by a PWM output signal. In addition, the power state of the power excitation terminal can be monitored and controlled by a software program to ensure the normal operation of the external device; the power excitation terminal unit 23 can support the horizontal expansion of pluggable terminals according to the power supply requirements of the sensors that need to be connected in the actual bridge and tunnel monitoring scene; the expansion interface unit 24 can expand the access of solar power, and can be constructed with the backup battery to form a stable power supply in an environment without city power. The expansion interface unit 24 includes a solar panel, and the solar panel is charged and discharged by the power control unit 21. The output signal of the power control unit 21 is set to a PWM output signal. In the power control unit 21, the parameters of the solar panel charging, such as the charging voltage, the charging current, etc. can be set. In addition, the charging state of the solar panel can also be monitored and controlled by a software program to ensure the optimal operating state of the solar panel. The implementation methods of the power control unit 21, the backup battery unit 22, the power excitation terminal unit 23, and the expansion interface unit 24 in the power module of the present invention are all controlled and managed by a microcontroller to ensure the stability, reliability and safety of the power module.At the same time, by setting up a variety of protection measures and monitoring mechanisms, the life of the backup battery and solar panels can be effectively extended, and the normal operation of external equipment can be guaranteed. The implementation of these technical solutions provides an important guarantee for the stable operation of the edge gateway for bridge and tunnel structure safety monitoring. Figure 4 As shown, the interface module 3 includes a pluggable vibrating-string signal acquisition unit 31, a current and voltage acquisition unit 32, a dynamic strain acquisition unit 33, a vibration signal acquisition unit 34 and an RS485 / RS232 expansion unit 35; the above-mentioned vibrating-string signal acquisition unit 31, the current and voltage acquisition unit 32, the dynamic strain acquisition unit 33, and the vibration signal acquisition unit 34 in the interface module 3 are all pluggable, retaining the same insertion interface, and retaining a cable input / output interface at the top and bottom respectively. According to the actual business needs of bridge and tunnel monitoring, multiple types and non-fixed numbers of units can be customized for access. The vibrating-wire signal acquisition unit 31 converts the vibrating-wire strain signal into a digital signal for the vibrating-wire strain sensor used in the bridge and tunnel monitoring process, and connects to the edge gateway for data acquisition, calculation and analysis; the current and voltage acquisition unit 32 converts the current and voltage signals into digital signals for the general current and voltage output sensors (4 / 20mA, 5-10V) used in the bridge and tunnel monitoring process, such as the inclination sensor for angle measurement, the temperature and humidity meter for bridge environment measurement, the telescopic displacement meter for support displacement monitoring, and the differential pressure transmitter for user bridge deflection monitoring, and connects to the edge gateway for data acquisition, calculation and analysis; the dynamic strain acquisition unit 33 converts the dynamic strain gauge used in the bridge monitoring process into a digital signal for real-time acquisition and analysis of the bridge Analyze the instantaneous stress conditions of strains, and the dynamic strain acquisition unit 33 converts the dynamic strain signal into a digital signal to enter the edge gateway for collection, calculation and analysis; the vibration signal acquisition unit 34 converts the acceleration signal used in the monitoring process of bridges and tunnels, such as cable tension, earthquake, bridge vibration and other monitoring needs, into a digital signal that can be recognized by the edge gateway system, and connects to calculation and analysis; the RS485 / RS232 expansion unit 35 is required to access the edge end through a serial port in the monitoring process of bridges and tunnels. This serial port method is used when it is necessary to use signals that are not included in the above-mentioned types. The secondary application development of extended sensors is supported in the bridge and tunnel monitoring edge gateway application to ensure the scalability of the system. By using the signal acquisition units commonly used in the above-mentioned bridge and tunnel monitoring processes, the acquisition card hardware in the original monitoring process can be omitted, and through the pluggable design, it can be flexibly assembled according to the monitoring needs, and the edge end is controlled nearby to increase the efficiency of collection, providing effective basic support for the edge application of the bridge and tunnel application system. Figure 5As shown, the communication module 4 includes a status indicator 41, a wired network unit 42, a Wifi network unit 43, a 4G / 5G network unit 44 and a LoRa network unit 45, and the wired network unit 42, the Wifi network unit 43, the 4G / 5G network unit 44 and the LoRa network unit 45 are all pluggable settings; the status indicator 41 adopts the form of an LED lamp to indicate different states through different colors and flashing frequencies; the status indicator 41 is set to 4 LED indicators, and the 4 LED indicators are respectively a wired network indicator, a Wifi communication indicator, a 4G / 5G communication indicator, and a LoRa communication indicator, which are used for the working status of different network communication units. For example, green indicates a normal connection, red indicates an abnormal connection or disconnection, and the flashing frequency can indicate the transmission speed, etc. The control of the status indicator can be realized through the bridge and tunnel monitoring edge application. During the data transmission process, the network communication module will control the corresponding status indicator according to the currently used communication mode. For example, if a wired network is currently used, the wired network indicator will light up, and other indicators will go out or flash. When the network communication module switches to other communication modes, the corresponding status indicator will also change. For example, if you switch from a wired network to Wifi, the wired network indicator light will go out and the Wifi indicator light will light up; in this way, the status monitoring and control of the network communication module can be realized, which is convenient for users to understand the working status of the equipment and take corresponding measures in time to ensure the normal operation of the equipment. The wired network unit 42 is connected to the edge gateway using an RJ45 interface and a corresponding transmission cable; the wired network unit 42 uses Ethernet technology to achieve data transmission. The wired network unit is connected to the edge gateway using an RJ45 interface and a corresponding transmission cable. To ensure the stability and speed of data transmission, a network card that supports Gigabit Ethernet and compatible cables are selected. In addition, the wired network unit can also be connected through network devices such as switches and routers to meet the data transmission network requirements in different bridge and tunnel monitoring scenarios. The wired network unit 42 uses a pluggable method, which can be optionally supported according to the requirements of the bridge and tunnel monitoring business scenario.

[0063] The Wifi network unit 43 uses wireless network technology to achieve communication between the edge gateway and other devices through the IEEE802.11 protocol; in this embodiment, the Wifi network unit can choose to support 2.4GHz and 5GHz dual-band wireless network cards to meet the signal propagation requirements in different environments. To ensure network security, WPA2 / WPA3 encryption can be used, and multiple authentication methods such as PSK and EAP are supported. In addition, the Wifi network unit can be expanded through wireless routers, hotspots and other devices to improve network coverage and stability. The Wifi network unit 43 uses a pluggable method, which can be optionally supported according to the requirements of the bridge and tunnel monitoring business scenario.

[0064] The 4G / 5G network unit 44 uses a communication module 4 that supports 4G LTE and 5G NR to achieve the connection between the edge gateway and the Internet; in order to adapt to the mobile network standards of different regions, a module with global universal frequency band support is selected. At the same time, the module should have a SIM card slot so that users can choose the appropriate operator and IoT package according to their needs. During the data transmission process, VPN, IPsec and other security technologies can be used to ensure data security. The 4G / 5G network unit 44 uses a pluggable method and can be optionally supported according to the requirements of the bridge and tunnel monitoring business scenario.

[0065] The LoRa network unit 45 uses low-power wide area network (LPWAN) technology to achieve long-distance, low-power data transmission; in this embodiment, the LoRa network unit uses a communication module that supports the LoRaWAN protocol. In order to meet the frequency band requirements of different regions, a module with multiple frequency band support is selected. At the same time, the LoRa network unit should have the ability to access the LoRa gateway to achieve data relay and transmission. To ensure the security of the data, the AES encryption technology can be used to encrypt the data. The LoRa network unit 45 uses a pluggable method, which can be optionally supported according to the requirements of the bridge and tunnel monitoring business scenario.

[0066] Through the combined use of the above four network units, the ARM architecture-based bridge and tunnel structure safety monitoring edge gateway described in the present invention can achieve flexible, stable, efficient and secure data transmission, and meet the network requirements in different bridge and tunnel structure safety monitoring scenarios.

[0067] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An ARM-based edge gateway for monitoring the safety of bridge and tunnel structures, comprising an integrated control board (1), a power module (2), an interface module (3), and a communication module (4). Features: The integrated control board (1), power module (2), interface module (3) and communication module (4) are all installed inside the housing (5); the power module (2) is electrically connected to the integrated control board (1), the integrated control board (1) is electrically connected to the interface module (3), and the interface module (3) is electrically connected to the communication module (4); the integrated control board (1) is used to perform various bridge and tunnel monitoring signal collection, data persistence storage, edge computing analysis, data visualization and data download; the power module (2) is used to provide a continuous and stable power output for the entire device and the connected sensors; the interface module (3) is configured as a pluggable component, which is used to access various sensor signals for bridge and tunnel monitoring and convert and collect the signals; the communication module (4) is a pluggable component, which is used to provide wired or wireless multi-type network communication services to the outside; the housing (5) is used to protect its internal electronic components and dust and water resistance in outdoor environments, providing support for adapting to the harsh environment of bridge and tunnel monitoring.

2. According to claim 1, a bridge and tunnel structure safety monitoring edge gateway based on ARM architecture, Features: The integrated control board (1) comprises an ARM processing unit (11), a memory unit (12), a storage unit (13) and a storage expansion unit (14); the ARM processing unit (11) comprises an ARM processor with high performance and low power consumption; the memory unit (12) is connected to the ARM processor via a high-speed bus; the storage unit (13) is connected to the ARM processor via a high-speed interface; and the storage expansion unit (14) reserves an expansion storage interface for the integrated control board (1), so as to increase the long-term storage capacity of monitoring data in accordance with actual business needs of bridge and tunnel monitoring scenarios.

3. According to claim 2, a bridge and tunnel structure safety monitoring edge gateway based on ARM architecture, Features: The storage unit (13) is configured as a storage module with real-time high-efficiency reading and writing speed and reliability to ensure fast access and long-term stable storage of real-time data; The storage expansion unit (14) provides expandable storage space to persistently retain monitoring data over a longer time range.

4. According to the ARM architecture-based bridge and tunnel structure safety monitoring edge gateway of claim 1, Features: The power module (2) comprises a power control unit (21), a backup battery unit (22), a power excitation terminal unit (23) and an expansion interface unit (24); the power control unit (21) is used to sample the battery voltage and current of the backup battery unit (22), monitor the battery status in real time, and perform protection control according to preset battery protection parameters; the backup battery unit (22) comprises a lithium-ion battery with high energy density; the power excitation terminal unit (23) is used to provide a power excitation signal for an external device; the expansion interface unit (24) comprises a solar cell panel, and the solar cell panel is controlled to be charged and discharged by the power control unit (21), and the output signal of the power control unit (21) is set as a PWM output signal.

5. According to claim 4, a bridge and tunnel structure safety monitoring edge gateway based on ARM architecture, Features: The power control unit (21) is configured as a microcontroller of the STM32 series, and is used to set charging parameters of the solar panel, and to monitor and control the charging state of the solar panel through a software program; an ADC module is provided in the microcontroller, and the ADC module samples the battery voltage and current, monitors the battery state in real time, and can perform protection control according to preset battery protection parameters.

6. According to claim 4, a bridge and tunnel structure safety monitoring edge gateway based on ARM architecture, Features: At least one group of the power excitation terminal units (23) is provided, and at least one group of the power excitation terminal units (23) includes positive and negative electrodes, and the excitation voltage can be dynamically configured in the system. In actual application, multiple groups of power supply terminals with different voltages can be configured according to requirements.

7. According to claim 1, a bridge and tunnel structure safety monitoring edge gateway based on ARM architecture, Features: The interface module (3) comprises a pluggable vibrating-wire signal acquisition unit (31), a current and voltage acquisition unit (32), a dynamic strain acquisition unit (33), a vibration signal acquisition unit (34) and an RS485 / RS232 expansion unit (35); the vibrating-wire signal acquisition unit (31) converts the vibrating-wire strain signal into a digital signal for the vibrating-wire strain sensor used in the bridge and tunnel monitoring process, and connects to an edge gateway for data acquisition, calculation and analysis; the current and voltage acquisition unit (32) converts the current and voltage signal into a digital signal for the universal current and voltage output sensor used in the bridge and tunnel monitoring process, and connects to an edge gateway for data acquisition, calculation and analysis; the dynamic strain acquisition unit (33) The unit (33) collects and analyzes the instantaneous stress condition of the bridge strain in real time for the dynamic strain gauge used in the bridge monitoring process. The dynamic strain collection unit (33) converts the dynamic strain signal into a digital signal and enters the edge gateway for collection, calculation and analysis; the vibration signal collection unit (34) converts the acceleration signal used in the bridge and tunnel monitoring process into a digital signal that can be recognized by the edge gateway system and accesses the calculation and analysis; the RS485 / RS232 expansion unit (35) supports the secondary application development of the extended sensor in the bridge and tunnel monitoring edge gateway application program in order to ensure the scalability of the system.

8. According to claim 1, a bridge and tunnel structure safety monitoring edge gateway based on ARM architecture, Features: The communication module (4) comprises a status indicator light (41), a wired network unit (42), a Wifi network unit (43), a 4G / 5G network unit (44) and a LoRa network unit (45); the status indicator light (41) is in the form of an LED light to indicate different states through different colors and flashing frequencies; the wired network unit (42) is connected to the edge gateway using an RJ45 interface and a corresponding transmission cable; the Wifi network unit (43) uses wireless network technology to achieve communication between the edge gateway and other devices through the IEEE802.11 protocol; the 4G / 5G network unit (44) uses a communication module (4) supporting 4G LTE and 5G NR to achieve connection between the edge gateway and the Internet; the LoRa network unit (45) uses low-power wide area network technology to achieve long-distance, low-power data transmission; the wired network unit (42), the Wifi network unit (43), the 4G / 5G network unit (44) and the LoRa network unit (45) are all pluggable.

9. According to claim 8, a bridge and tunnel structure safety monitoring edge gateway based on ARM architecture, Features: The status indicator light (41) is configured as four LED indicator lights, which are respectively a wired network indicator light, a Wifi communication indicator light, a 4G / 5G communication indicator light, and a LoRa communication indicator light.

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