Distributed limited space operation safety management base station device system

Abstract

The invention discloses a distributed limited space operation safety management base station device system. According to the invention, through a three-level networking architecture and a multi-modal data fusion technology, the problems of many monitoring blind areas and data dispersion in a traditional working environment are effectively solved. The system adopts hierarchical deployment of the first router, the second router and the third router, and combines a wired and wireless hybrid transmission mode, so that full coverage of network signals in a limited space is realized, and complete acquisition of environmental parameters and video monitoring data is ensured. The industrial personal computer localization data processing mechanism can directly trigger the audible and visual alarm and the ventilation fan when detecting that the gas concentration exceeds the standard or the personnel is abnormal, so that the decision chain from data acquisition to emergency response is greatly shortened, the delay risk of remote server instruction transmission is avoided, and the accident prevention capability is remarkably improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of confined space operations, and in particular relates to a distributed confined space operation safety management base station device system. Background Art

[0002] Confined space operation safety management refers to a series of safety measures and management methods implemented for work activities in closed or semi-enclosed spaces to ensure the safety and health of workers. This type of management includes but is not limited to the identification, assessment, monitoring and control of confined spaces, as well as pre-operation safety training, the formulation and implementation of emergency plans. The management content involves ventilation, gas detection, personal protection, work permits, on-site monitoring and other aspects, aiming to prevent potential hazards such as suffocation, poisoning, fire, explosion, etc. Through strict safety management systems and operating procedures, confined space operation safety management effectively reduces operational risks and ensures the life safety of workers. It is an important part of safety work in industrial enterprises and various construction sites.

[0003] However, the traditional safety management of confined space operations has the following problems: the environment is closed and ventilation is poor, which can easily lead to the accumulation of harmful substances; there are many blind spots in monitoring, making it difficult to achieve full-range safety monitoring; data collection is scattered and lacks a unified management platform; early warning responses are not timely and accident prevention capabilities are poor. Summary of the invention

[0004] The purpose of the present invention is to provide a distributed confined space operation safety management base station device system in order to solve the above-mentioned problems.

[0005] The technical solution adopted by the present invention is as follows: a distributed limited space operation safety management base station device system, the system comprising:

[0006] External main base station: including a first router, a control machine, an audible and visual alarm and a ventilation fan, wherein the control machine is connected to the first router via a wire, and the first router is connected to the audible and visual alarm and the fan via a relay;

[0007] Internal main base station: including a second router, a Wi-Fi string server, an environmental monitoring unit and an audible and visual alarm, wherein the second router is connected to the first router via a wire, and the Wi-Fi string server is connected to a temperature and humidity sensor and a four-in-one gas detector;

[0008] At least two internal substations: each substation includes a third router and an AI camera, and the third router is connected to the AI ​​camera via a wire;

[0009] Remote server: Receives environmental data and alarm information forwarded by the control machine through the MQTT protocol.

[0010] In a preferred embodiment, the first router inside the external main base station is packaged in an industrial-grade metal shell, equipped with 4 Gigabit Ethernet ports and a dual-band Wi-Fi module, and supports the IEEE 802.11ac wireless communication standard. The device has a built-in hardware watchdog circuit and a wide-temperature heat dissipation structure. The power supply interface complies with the 24V DC industrial power supply specification. A multi-function status indicator light is provided on the back, which can display the network connection status and data transmission rate in real time. The firmware of the first router is customized based on the OpenWRT system and supports VLAN division and QoS traffic priority management functions.

[0011] In a preferred embodiment, the control machine of the external main base station is an independently operated embedded control unit equipped with an Intel Celeron J1900 quad-core processor, 8GB DDR3L memory and 64GB mSATA solid-state storage medium. The front panel of the device is provided with a system operation status display and an emergency stop button, and the back interface includes 2 RJ45 network interfaces, 4 USB 2.0 interfaces and 1 RS485 serial communication port. The internal circuit board adopts a three-proof paint coating process, is equipped with an independent power management module, and supports 9-36V DC wide voltage input.

[0012] In a preferred embodiment, the sound and light alarm unit of the external main base station is wrapped by a high-strength polycarbonate shell, with a built-in 100dB piezoelectric buzzer and an ultra-high brightness LED array. The device is connected to the relay control terminal of the first router through a 6-core waterproof connector, and supports switching between pulse alarm mode and continuous alarm mode. The internal drive circuit includes an overload protection module and a voltage stabilization circuit, and the operating current range covers the 12-24V DC power supply standard.

[0013] In a preferred embodiment, the ventilation fan of the external main base station adopts an all-aluminum explosion-proof housing design, equipped with a three-phase asynchronous motor and an adjustable angle fan blade structure. The motor has a rated power of 2.2kW, a speed range adjustment accuracy of ±50rpm, and a built-in temperature sensor and vibration monitoring module. The control interface is connected to the relay output of the first router through an industrial-grade terminal block, supporting two-way communication of forward and reverse control signals and operating status feedback signals.

[0014] In a preferred embodiment, the second router of the internal main base station adopts a rail-type installation structure, equipped with a metal shielding shell and a dust filter. The device is equipped with 2 Gigabit WAN ports and 4 100M LAN ports, and supports PoE power output function. The internal processor is equipped with an MT7621A dual-core chipset, running a customized network protocol stack, which can realize data packet priority marking and port mirroring functions. The power module is equipped with overvoltage protection and reverse connection protection circuits, and the operating temperature range is -25°C to 75°C;

[0015] The Wi-Fi serial server device of the internal main base station integrates 4 isolated RS485 interfaces and 1 TCP / IP communication module, supporting Modbus RTU / TCP protocol bidirectional conversion. The internal circuit board adopts photoelectric isolation technology, and the serial port communication rate can be configured to 9600-115200bps. The device is equipped with an external omnidirectional antenna, and the wireless transmission distance is up to 100 meters in an open environment. The built-in watchdog timer can automatically restore the abnormal communication state.

[0016] In a preferred embodiment, the temperature and humidity sensor of the environmental monitoring unit of the internal main base station adopts a capacitive measurement principle, and the probe part is equipped with a stainless steel protective cover and an air circulation channel. The device measurement range covers a temperature range of -40°C to 85°C and a humidity range of 0% to 100% RH, and an internal 16-bit ADC converter and a digital filtering algorithm are integrated. The power supply interface supports 12-24V DC input, and the signal output end is connected to the Wi-Fi string server via a shielded twisted pair cable.

[0017] The sensor array of the four-in-one detector includes an electrochemical oxygen detection unit, a catalytic combustion combustible gas detection unit, a non-dispersive infrared CO detection unit and a constant potential electrolytic H 2 S detection unit. The device shell meets the IP66 protection level standard, the sampling port is equipped with an explosion-proof metal filter, and the internal equipment is equipped with an automatic zero calibration circuit and a temperature compensation module. The detection data is output in Modbus protocol format through the RS485 interface, and the sampling interval can be configured through the host computer software.

[0018] In a preferred embodiment, the sound and light alarm unit of the internal main base station adopts a split design, the alarm controller is installed in the second router chassis via a DIN rail, and the alarm terminal adopts a magnetic fixing structure. The controller is equipped with 8 independent relay outputs and supports multi-level alarm threshold settings; the terminal device includes a rotating warning light and a horn speaker, and the sound pressure level reaches 120dB. The signal transmission adopts a twisted pair connection method, and the maximum transmission distance can reach 500 meters.

[0019] In a preferred embodiment, the control machine of the external main base station adopts a fanless embedded architecture, equipped with an Intel Atom x5-E3940 quad-core processor and 8GB DDR4 memory, and equipped with a 128GB solid-state hard drive for local data caching. The front of the device is provided with a status indicator and a hardware reset button, and the back interface includes 4 Gigabit RJ45 ports, 2 USB3.0 interfaces and 1 DB9 serial communication port. The system runs a customized Ubuntu Core operating system, with a built-in Java virtual machine environment for executing data acquisition scripts, and realizes long-connection communication with the Wi-Fi string server through the Netty framework. The industrial computer motherboard integrates a hardware watchdog circuit, which can automatically restart when the system is abnormal. The power supply module supports 12-36V wide voltage DC input and has an overvoltage protection function.

[0020] In a preferred embodiment, the four-in-one gas detector adopts the diffusion sampling principle, with a built-in electrochemical oxygen sensor, a catalytic combustion combustible gas sensor and an infrared absorption CO / H 2 S composite sensor. The detection unit is encapsulated in a 316L stainless steel cavity, with a multi-layer sintered metal dust filter at the front end, and contains a temperature and humidity compensation circuit and a zero point automatic calibration module. The equipment is powered by a 24V DC industrial standard power supply, and the measuring range covers 0% to 30% VOL oxygen concentration, 0-1000ppm carbon monoxide, 0-100ppm hydrogen sulfide and 0% to 100% LEL combustible gas lower explosion limit. The signal output end is connected to the RS485 interface of the Wi-Fi string server via a shielded twisted pair cable. The sampling interval can be configured to 1 to 60 seconds, and it has a sensor life warning function;

[0021] The AI ​​camera adopts an all-weather explosion-proof shell design, built-in 5-megapixel global shutter CMOS sensor and 850nm infrared fill light module, equipped with Huawei Ascend 310 edge computing chip. The optical components include a 6mm fixed focal length lens and a dual-glass filter switching mechanism, supporting visible light and near-infrared dual-mode imaging. The device integrates 4GB LPDDR4 memory and 32GB eMMC storage, runs a customized TensorFlow Lite inference engine, and realizes 100M network communication through a direct network cable to the LAN port of the third router. The motherboard is equipped with a hardware encryption chip, supports H.265 video encoding and ONVIF protocol standards, and the operating temperature range covers -40℃ to 70℃ industrial environment requirements.

[0022] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0023] 1. In the present invention, the three-level networking architecture and multimodal data fusion technology effectively solve the problems of multiple monitoring blind spots and scattered data in traditional working environments. The system adopts the hierarchical deployment of the first router, the second router and the third router, combined with the wired and wireless hybrid transmission mode, to achieve full coverage of network signals in a limited space, ensuring the complete collection of environmental parameters and video surveillance data. The localized data processing mechanism of the industrial computer can directly trigger the sound and light alarm and ventilation fan when the gas concentration exceeds the standard or the abnormal behavior of personnel is detected, which greatly shortens the decision-making chain from data collection to emergency response, avoids the risk of delay in remote server command transmission, and significantly improves the accident prevention capability.

[0024] 2. In the present invention, the scalability brought by the modular design of the system enables it to flexibly increase the internal substation units according to the scale of the operation area. Data intercommunication is achieved between base stations through standard protocols, which not only ensures the collaborative work of environmental monitoring sensors, AI cameras and other equipment, but also reduces the complexity of system maintenance. The independent operation characteristics of multi-level routers enhance the fault tolerance of the overall architecture, and a single node failure will not cause global paralysis. This design not only meets the real-time safety management and control requirements of confined space operations, but also reserves a compatible interface for subsequent functional upgrades, and has strong engineering applicability and technical foresight. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is the overall system block diagram of the present invention;

[0026] Figure 2 This is a block diagram of the external master base station system in the present invention;

[0027] Figure 3 This is a block diagram of the internal main base station system in the present invention;

[0028] Figure 4 This is a block diagram of the internal substation system in the present invention. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0030] Example:

[0031] Reference Figure 1-4 ,

[0032] A distributed limited space operation safety management base station device system, the system includes:

[0033] External main base station: includes the first router, control machine, sound and light alarm and ventilation fan. The control machine is connected to the first router through a wire, and the first router is connected to the sound and light alarm and the fan through a relay.

[0034] Internal main base station: includes the second router, Wi-Fi string server, environmental monitoring unit and sound and light alarm. The second router is connected to the first router through a wire. The Wi-Fi string server is connected to the temperature and humidity sensor and the four-in-one gas detector.

[0035] At least two internal substations: each substation includes a third router and an AI camera, and the third router is connected to the AI ​​camera via a wire;

[0036] Remote server: Receives environmental data and alarm information forwarded by the control machine through the MQTT protocol.

[0037] The first router inside the external main base station is encapsulated in an industrial-grade metal shell, equipped with 4 Gigabit Ethernet ports and a dual-band Wi-Fi module, and supports the IEEE 802.11ac wireless communication standard. The device has a built-in hardware watchdog circuit and a wide-temperature heat dissipation structure. The power supply interface complies with the 24V DC industrial power supply specification. There is a multi-function status indicator on the back that can display the network connection status and data transmission rate in real time. The firmware of the first router is customized based on the OpenWRT system and supports VLAN division and QoS traffic priority management functions.

[0038] The control machine of the external main base station is an independently operated embedded control unit equipped with an Intel Celeron J1900 quad-core processor, 8GB DDR3L memory and 64GB mSATA solid-state storage medium. The front panel of the device is equipped with a system operation status display and an emergency stop button, and the back interface includes 2 RJ45 network interfaces, 4 USB 2.0 interfaces and 1 RS485 serial communication port. The internal circuit board adopts a three-proof paint coating process, is equipped with an independent power management module, and supports 9-36V DC wide voltage input.

[0039] The sound and light alarm unit of the external main base station is wrapped in a high-strength polycarbonate shell, with a built-in 100dB piezoelectric buzzer and an ultra-high brightness LED array. The device is connected to the relay control terminal of the first router through a 6-core waterproof connector, supporting the switching between pulse alarm mode and continuous alarm mode. The internal drive circuit includes an overload protection module and a voltage stabilization circuit, and the operating current range covers the 12-24V DC power supply standard.

[0040] The ventilation fan of the external main base station adopts an all-aluminum explosion-proof housing design, equipped with a three-phase asynchronous motor and an adjustable angle fan blade structure. The motor has a rated power of 2.2kW, a speed range adjustment accuracy of ±50rpm, and a built-in temperature sensor and vibration monitoring module. The control interface is connected to the relay output of the first router through an industrial-grade terminal block, supporting two-way communication of forward and reverse control signals and operating status feedback signals.

[0041] The second router of the internal main base station adopts a rail-mounted structure, equipped with a metal shielding shell and a dust filter. The device is equipped with 2 Gigabit WAN ports and 4 100M LAN ports, and supports PoE power output function. The internal processor is equipped with an MT7621A dual-core chipset, running a customized network protocol stack, which can realize data packet priority marking and port mirroring functions. The power module is equipped with overvoltage protection and reverse connection protection circuits, and the operating temperature range is -25℃ to 75℃;

[0042] The Wi-Fi serial server device of the internal main base station integrates 4 isolated RS485 interfaces and 1 TCP / IP communication module, supporting Modbus RTU / TCP protocol bidirectional conversion. The internal circuit board adopts photoelectric isolation technology, and the serial port communication rate can be configured to 9600-115200bps. The device is equipped with an external omnidirectional antenna, and the wireless transmission distance is up to 100 meters in an open environment. The built-in watchdog timer can automatically restore abnormal communication status.

[0043] The temperature and humidity sensor of the environmental monitoring unit of the internal main base station adopts the capacitive measurement principle, and the probe part is equipped with a stainless steel protective cover and air circulation channels. The device measurement range covers the temperature range of -40℃ to 85℃ and the humidity range of 0% to 100% RH. It integrates a 16-bit ADC converter and a digital filtering algorithm. The power supply interface supports 12-24V DC input, and the signal output end is connected to the Wi-Fi string server via a shielded twisted pair cable.

[0044] The sensor array of the four-in-one detector includes an electrochemical oxygen detection unit, a catalytic combustion combustible gas detection unit, a non-dispersive infrared CO detection unit and a constant potential electrolytic H 2 S detection unit. The device shell meets the IP66 protection level standard, the sampling port is equipped with an explosion-proof metal filter, and the internal equipment is equipped with an automatic zero calibration circuit and a temperature compensation module. The detection data is output in Modbus protocol format through the RS485 interface, and the sampling interval can be configured through the host computer software.

[0045] The sound and light alarm unit of the internal main base station adopts a split design. The alarm controller is installed in the second router chassis via a DIN rail, and the alarm terminal adopts a magnetic fixing structure. The controller is equipped with 8 independent relay outputs and supports multi-level alarm threshold settings; the terminal equipment includes a rotating warning light and a horn speaker with a sound pressure level of 120dB. The signal transmission adopts a twisted pair connection method, and the maximum transmission distance can reach 500 meters.

[0046] The control machine of the external main base station adopts a fanless embedded architecture, equipped with an Intel Atom x5-E3940 quad-core processor and 8GB DDR4 memory, and equipped with a 128GB solid-state drive for local data caching. The front of the device is equipped with a status indicator and a hardware reset button, and the back interface includes 4 Gigabit RJ45 ports, 2 USB 3.0 interfaces and 1 DB9 serial communication port. The system runs a customized Ubuntu Core operating system, with a built-in Java virtual machine environment for executing data collection scripts, and realizes long-term connection communication with the Wi-Fi string server through the Netty framework. The industrial computer motherboard integrates a hardware watchdog circuit, which can automatically restart when the system is abnormal. The power supply module supports 12-36V wide voltage DC input and has overvoltage protection function.

[0047] The four-in-one gas detector adopts the diffusion sampling principle, with built-in electrochemical oxygen sensor, catalytic combustion combustible gas sensor and infrared absorption CO / H 2 S composite sensor. The detection unit is encapsulated in a 316L stainless steel cavity, with a multi-layer sintered metal dust filter at the front end, and contains a temperature and humidity compensation circuit and a zero point automatic calibration module. The equipment is powered by a 24V DC industrial standard power supply, and the measuring range covers 0% to 30% VOL oxygen concentration, 0-1000ppm carbon monoxide, 0-100ppm hydrogen sulfide and 0% to 100% LEL combustible gas lower explosion limit. The signal output end is connected to the RS485 interface of the Wi-Fi string server via a shielded twisted pair cable. The sampling interval can be configured to 1 to 60 seconds, and it has a sensor life warning function;

[0048] The AI ​​camera adopts an all-weather explosion-proof shell design, built-in 5-megapixel global shutter CMOS sensor and 850nm infrared fill light module, equipped with Huawei Ascend 310 edge computing chip. The optical components include a 6mm fixed focal length lens and a dual glass filter switching mechanism, supporting visible light and near-infrared dual-mode imaging. The device integrates 4GB LPDDR4 memory and 32GB eMMC storage, runs a customized TensorFlow Lite inference engine, and realizes 100M network communication through a direct network cable to the LAN port of the third router. The motherboard is equipped with a hardware encryption chip, supports H.265 video encoding and ONVIF protocol standards, and the operating temperature range covers -40℃ to 70℃ industrial environment requirements.

[0049] From the above, it can be known that: in the present invention, the three-level networking architecture and multimodal data fusion technology are used to effectively solve the problems of multiple monitoring blind spots and scattered data in traditional working environments. The system adopts a hierarchical deployment of the first router, the second router and the third router, combined with a hybrid transmission mode of wired and wireless, to achieve full coverage of network signals in a limited space, ensuring the complete collection of environmental parameters and video surveillance data. The localized data processing mechanism of the industrial computer can directly trigger the sound and light alarm and ventilation fan when excessive gas concentration or abnormal behavior of personnel is detected, which greatly shortens the decision-making chain from data collection to emergency response, avoids the risk of delay in remote server command transmission, and significantly improves the ability to prevent accidents.

[0050] In the present invention, the scalability brought by the modular design of the system enables it to flexibly increase the internal substation units according to the scale of the operation area. Data intercommunication is achieved between base stations through standard protocols, which not only ensures the collaborative work of environmental monitoring sensors, AI cameras and other equipment, but also reduces the complexity of system maintenance. The independent operation characteristics of multi-level routers enhance the fault tolerance of the overall architecture, and a single node failure will not cause global paralysis. This design not only meets the real-time safety management and control requirements of confined space operations, but also reserves a compatible interface for subsequent functional upgrades, and has strong engineering applicability and technical foresight.

[0051] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0052] 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 distributed limited space operation safety management base station device system, characterized in that: The system comprises: External main base station: including a first router, a control machine, an audible and visual alarm and a ventilation fan, wherein the control machine is connected to the first router via a wire, and the first router is connected to the audible and visual alarm and the fan via a relay; Internal main base station: including a second router, a Wi-Fi string server, an environmental monitoring unit and an audible and visual alarm, wherein the second router is connected to the first router via a wire, and the Wi-Fi string server is connected to a temperature and humidity sensor and a four-in-one gas detector; At least two internal substations: each substation includes a third router and an AI camera, and the third router is connected to the AI ​​camera via a wire; Remote server: Receives environmental data and alarm information forwarded by the control machine through the MQTT protocol.

2. The distributed limited space operation safety management base station device system according to claim 1, characterized in that: The first router inside the external main base station is packaged in an industrial-grade metal shell, equipped with 4 Gigabit Ethernet ports and a dual-band Wi-Fi module, and supports the IEEE802.11ac wireless communication standard; the device has a built-in hardware watchdog circuit and a wide-temperature heat dissipation structure.

3. The distributed limited space operation safety management base station device system according to claim 1, characterized in that: The control machine of the external main base station is an independently running embedded control unit, equipped with an Intel Celeron J1900 quad-core processor, 8GB DDR3L memory and 64GB mSATA solid-state storage medium; the front panel of the device is equipped with a system operation status display and an emergency stop button, and the back interface includes 2 RJ45 network interfaces, 4 USB2.0 interfaces and 1 RS485 serial communication port; the internal circuit board adopts a triple-proof paint coating process.

4. The distributed limited space operation safety management base station device system according to claim 1, characterized in that: The sound and light alarm unit of the external main base station is wrapped in a high-strength polycarbonate shell, with a built-in 100dB piezoelectric buzzer and an ultra-high brightness LED array; the device is connected to the relay control terminal of the first router through a 6-core waterproof connector, and supports switching between pulse alarm mode and continuous alarm mode; the internal drive circuit includes an overload protection module and a voltage stabilization circuit.

5. The distributed limited space operation safety management base station device system according to claim 1, characterized in that: The ventilation fan of the external main base station adopts an all-aluminum explosion-proof shell design, equipped with a three-phase asynchronous motor and an adjustable angle fan blade structure; the motor has a rated power of 2.2kW, a speed range adjustment accuracy of ±50rpm, and a built-in temperature sensor and vibration monitoring module; the control interface is connected to the relay output end of the first router through an industrial-grade terminal block.

6. The distributed limited space operation safety management base station device system according to claim 1, characterized in that: The second router of the internal main base station adopts a guide rail installation structure, equipped with a metal shielding shell and a dust filter; the device is equipped with 2 Gigabit WAN ports and 4 100M LAN ports, and supports PoE power output function; The Wi-Fi serial server device of the internal main base station integrates 4 isolated RS485 interfaces and 1 TCP / IP communication module, and supports ModbusRTU / TCP protocol bidirectional conversion; the internal circuit board adopts photoelectric isolation technology, and the serial port communication rate can be configured to 9600-115200bps.

7. The distributed limited space operation safety management base station device system according to claim 1, characterized in that: The temperature and humidity sensor of the environmental monitoring unit of the internal main base station adopts the capacitive measurement principle, and the probe part is equipped with a stainless steel protective cover and air circulation channels; the device measurement range covers the temperature range of -40°C to 85°C and the humidity range of 0% to 100% RH, and an internal 16-bit ADC converter and digital filtering algorithm are integrated; the power supply interface supports 12-24V DC input, and the signal output end is connected to the Wi-Fi string server via a shielded twisted pair cable; The sensor array of the four-in-one detector includes an electrochemical oxygen detection unit, a catalytic combustion combustible gas detection unit, a non-dispersive infrared CO detection unit and a constant potential electrolysis H2S detection unit.

8. The distributed limited space operation safety management base station device system according to claim 1, characterized in that: The sound and light alarm unit of the internal main base station adopts a split design. The alarm controller is installed in the chassis of the second router through a DIN rail, and the alarm terminal adopts a magnetic fixing structure; the controller is equipped with 8 independent relay outputs and supports multi-level alarm threshold settings; the terminal equipment includes a rotating warning light and a horn speaker with a sound pressure level of 120dB; the signal transmission adopts a twisted pair connection method, and the maximum transmission distance can reach 500 meters.

9. The distributed limited space operation safety management base station device system as claimed in claim 1, characterized in that: The control machine of the external main base station adopts a fanless embedded architecture, equipped with an Intel Atom x5-E3940 quad-core processor and 8GB DDR4 memory, and equipped with a 128GB solid-state drive for local data caching; the front of the device is provided with a status indicator light and a hardware reset button, and the back interface includes 4 Gigabit RJ45 ports, 2 USB 3.0 interfaces and 1 DB9 serial communication port.

10. The distributed limited space operation safety management base station device system according to claim 1, characterized in that: The four-in-one gas detector adopts the diffusion sampling principle, with built-in electrochemical oxygen sensor, catalytic combustion combustible gas sensor and infrared absorption CO / H2S composite sensor; the detection unit is encapsulated in a 316L stainless steel cavity, with a multi-layer sintered metal dust filter at the front end, and contains a temperature and humidity compensation circuit and a zero point automatic calibration module; the equipment is powered by a 24VDC industrial standard power supply, and the range covers 0% to 30% VOL oxygen concentration, 0-1000ppm carbon monoxide, 0-100ppm hydrogen sulfide and 0% to 100% LEL combustible gas lower explosion limit; The AI ​​camera adopts an all-weather explosion-proof shell design, with a built-in 5-megapixel global shutter CMOS sensor and 850nm infrared fill light module, and is equipped with Huawei Ascend 310 edge computing chip; the optical components include a 6mm fixed focal length lens and a dual glass filter switching mechanism.

Images