Limited space operation real-time emergency monitoring risk management and control system

Abstract

The invention discloses a real-time emergency monitoring risk management and control system for limited space operation, which comprises an operation approval system, an access control access management and control system, an operation scene image system, a mobile pumping type operation environment gas monitoring sound-light alarm system and a host controller, the host computer is connected with the operation approval system, the access control access management and control system, the operation scene image system and the mobile pumping type operation environment gas monitoring sound-light alarm system through a data transmission unit. According to the invention, mobile pumping type working environment gas monitoring is adopted, and gas at any position of limited space in different areas can be detected; a dehumidification filter is arranged in the pumping type gas production system, collected gas can be subjected to deslagging and drying treatment, the service life of equipment is prolonged, the detection accuracy is improved, and the equipment failure rate is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of risk management and control, and in particular relates to a real-time emergency monitoring risk management and control system for confined space operations with a mobile pump-suction gas detection function. Background Art

[0002] According to statistics, from 2013 to 2023, there were 98 major accidents in the confined space operation in the national industry and trade, and 368 people died. Among them, 95 accidents were caused by poisoning and suffocation, accounting for 96.9%; 79 accidents were caused by hydrogen sulfide and carbon monoxide, accounting for 80.6%; 36 accidents were caused by cleaning and dredging operations, accounting for 36.7%; and 28 accidents were caused by inspection and maintenance operations, accounting for 28.6%; 41 accidents occurred in the sewage treatment system in the confined space, accounting for 41.8%, and 30 accidents occurred in kilns, pulp pools, pickling pools, and tanks, accounting for 30.6%; 85 accidents were caused by blind rescue, accounting for 86.7%. In recent years, our province has experienced a number of large-scale poisoning and suffocation accidents in confined space operations. For example, on June 13, 2021, Sichuan Chengdu Yifeng Food Co., Ltd. caused 6 deaths from poisoning during sewage pumping operations at the sewage treatment station; on May 24, 2021, a poisoning and suffocation accident occurred during inspection and maintenance operations in the wastewater treatment room of Furong Bamboo Shoot Food Factory in Shuanghe Town, Changning County, Yibin City, Sichuan Province, killing 7 people; on April 13, 2024, a septic tank gas poisoning accident occurred at a pig farm in Lichun Town, Pengzhou City, Sichuan Province, killing 7 people. The typical problems exposed by confined space accidents are: first, the approval system for confined space operations has not been implemented, and safety risks have not been identified in place; second, the on-site emergency rescue is improperly handled, and blind rescue has led to increased casualties; third, the operators have a serious lack of safety awareness of confined space operations and are unclear about the operating procedures; fourth, there are weak links in supervision and management.

[0003] Through the analysis of relevant accident cases, it can be seen that due to the lack of air circulation in confined spaces, toxic and harmful gases such as hydrogen sulfide, carbon monoxide, and methane are easy to accumulate or the oxygen content is insufficient, which is very likely to cause poisoning, hypoxia, explosion and other accidents. Therefore, the Ministry of Emergency Management issued the "Safety Regulations for Confined Space Operations in Industrial and Trade Enterprises" (Order No. 13 of the Ministry of Emergency Management), requiring industrial and trade enterprises to take locks, isolation fences, protective nets or other physical isolation measures for confined spaces that may produce toxic substances to prevent personnel from entering without approval. Some personnel of enterprises where accidents occurred made "ignorant mistakes" or "incompetent mistakes" due to their weak safety awareness. They did not detect toxic and harmful gases before working in confined spaces or did not wear portable gas alarms as required during the operation; some accidents did not occur during the operation of confined spaces, and the relevant technical standards did not require the wearing of portable gas detectors. When carrying out other inspection and maintenance operations or patrol operations in related or adjacent areas, the abnormal release of toxic and harmful gases in confined spaces led to poisoning accidents. Confined space operations require "ventilation first, detection second, and operation last", and put forward the requirement of detection or continuous monitoring at fixed intervals. However, in the process of confined space operations in most enterprises, gases are often released in large quantities at intervals as sewage or sludge is stirred. If people walk in a large confined space without continuous detection and tracking, especially extremely low levels of hydrogen sulfide can cause instantaneous electric shock and death. Most people who died in accidents are not aware of the safety risks of confined spaces, especially factories are located in noisy areas, personnel access control is not strict, non-professionals watch or assist in rescue, and there are many uncertainties among personnel. Even if sound and light alarms are triggered on site, they still do not understand the safety risks on site, and blind rescue leads to the expansion of accidents; most gases in confined spaces, such as hydrogen sulfide, methane and carbon monoxide, are explosive gases, and the detection system is composed of various electrical components. If the detection system is not explosion-proof, it may cause ignition sources on site and cause explosion accidents; most confined spaces have poor gas source conditions and humid air. If the detection system is installed, it will affect the life of the instrument and the quality of the test results.

[0004] At present, there are no reports on the market about real-time emergency monitoring risk management system equipment for confined space operations with mobile pump-suction gas detection function, and a confined space online monitoring system that integrates operation approval, access control, workplace imaging, voice intercom, mobile pump-suction working environment gas monitoring sound and light alarm, host control, and government supervision. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a real-time emergency monitoring risk management system for confined space operations that uses a mobile pump-suction working environment gas monitoring system, can detect gases at any position in confined spaces in different areas, can extend the service life of the equipment, improve the detection accuracy, and reduce the equipment failure rate.

[0006] The objective of the present invention is achieved through the following technical solutions: a real-time emergency monitoring risk control system for confined space operations, including an operation approval system, an access control system, an operation scene imaging system, a mobile pump-suction operation environment gas monitoring sound and light alarm system, and a host control. The host control is connected to the operation approval system, the access control system, the operation scene imaging system, and the mobile pump-suction operation environment gas monitoring sound and light alarm system through a data transmission unit.

[0007] The mobile pump-suction working environment gas monitoring sound and light alarm includes a mobile chassis and a retractable gas sampling disk, a sampling pump, a dehumidification filter, a three-way valve, a flow meter and a battery installed in the mobile chassis; the battery is used to power the sampling pump, the flow meter, the body sensor and the dehumidification filter; the sampling pump is installed on the retractable gas sampling disk, and extends to any position inside the mobile chassis through the retractable gas sampling disk, and the gas sample is sucked by the sampling pump; the gas sample is deslagging and drying after passing through the dehumidification filter, and then connected to the flow meter and the gas sensor respectively through the three-way valve; the outputs of the flow meter and the gas sensor are both connected to the host control.

[0008] The host control includes a power module, an MCU module, a storage module, an RS485 communication interface, an RS232 communication interface, a network port, a 4G communication interface, an RTC real-time clock circuit, a sensor signal acquisition circuit, a switch output circuit and an input voltage detection circuit; the power module is used to supply power to other modules in the host control, the MCU module is respectively connected to the storage module, the RS485 communication interface, the RS232 communication interface, the network port, the 4G communication interface, the RTC real-time clock circuit, the sensor signal acquisition circuit, the switch output circuit and the input voltage detection circuit, and the sensor signal acquisition circuit is connected to the gas sensor and the flow meter.

[0009] The beneficial effects of the present invention are:

[0010] 1. In order to solve the safety management and emergency rescue needs of relevant operating personnel during the inspection, maintenance, inspection and operation in the existing confined space area, and the hidden dangers of rapid accumulation of toxic and harmful gases caused by abnormal upstream and downstream processes in the confined space, the utility model proposes a confined space operation real-time emergency monitoring risk control system equipment with a mobile pump-suction gas detection function, which can prevent and control the entire process of confined space operation. When the system detects an abnormality, it will issue an alarm and remind the supervisor to take emergency rescue measures to ensure the safety of relevant personnel in the confined space operation;

[0011] 2. Mobile pump-suction working environment gas monitoring is adopted, which can detect the gas at any position in the limited space of different areas; the pump-suction gas collection system is equipped with a dehumidification filter, which can remove slag and dry the collected gas, extend the service life of the equipment, improve the detection accuracy, and reduce the equipment failure rate;

[0012] 3. Video AI intelligent recognition is used in workplace images to identify whether there are illegal intruders, falls of on-site personnel, abnormal construction and other problems in the confined space. Through system linkage, system alarms, voice broadcasts or alarm lights are triggered to ensure the safety of confined space areas from the perspective of accident prevention and prevention of accident expansion. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of a confined space operation real-time emergency monitoring risk control system equipment with a mobile pump-suction gas detection function according to the present invention;

[0014] Figure 2 It is a structural schematic diagram of the invented mobile pump-suction working environment gas monitoring sound and light alarm system;

[0015] Figure 3 This is the circuit diagram of the XL4005 chip;

[0016] Figure 4 This is the circuit diagram of the AMS1117-3.3 chip;

[0017] Figure 5 This is the circuit diagram of the AMS1084 chip;

[0018] Figure 6 This is a schematic diagram of the structure of the STM32f1 series microcontroller;

[0019] Figure 7 This is the circuit diagram of the RS485 communication interface;

[0020] Figure 8 This is the circuit diagram of the RS232 communication interface;

[0021] Fig. 9 This is the circuit diagram of the network port;

[0022] Fig.10 It is a circuit diagram of a 4G communication interface;

[0023] Fig.11 A circuit diagram of a storage module;

[0024] Fig.12 It is the circuit diagram of the RTC real-time clock circuit;

[0025] Fig.13 It is the circuit diagram of the sensor signal acquisition circuit;

[0026] Fig.14 It is the circuit diagram of the switch output circuit;

[0027] Fig.15 This is the circuit diagram of the input voltage detection circuit. DETAILED DESCRIPTION

[0028] The technical solution of the present invention is further described below in conjunction with the accompanying drawings.

[0029] like Figure 1 As shown, a real-time emergency monitoring risk control system for limited space operations of the present invention includes an operation approval system, an access control system, an operation scene imaging system, a mobile pump-suction operation environment gas monitoring sound and light alarm system, and a host control. The host control is connected to the operation approval system, the access control system, the operation scene imaging system, and the mobile pump-suction operation environment gas monitoring sound and light alarm system through a data transmission unit;

[0030] like Figure 2 As shown, the mobile pump-suction working environment gas monitoring sound and light alarm includes a mobile chassis and a retractable gas sampling disk, a sampling pump, a dehumidification filter, a three-way valve, a flow meter and a battery installed in the mobile chassis; the battery is used to power the sampling pump, the flow meter, the body sensor and the dehumidification filter; the sampling pump is installed on the retractable gas sampling disk, and extends to any position inside the mobile chassis through the retractable gas sampling disk, and absorbs the gas sample through the sampling pump; the gas sample is deslagging and drying after passing through the dehumidification filter, and then connected to the flow meter and the gas sensor respectively through the three-way valve; the outputs of the flow meter and the gas sensor are connected to the host control. Draggable wheels are installed at the bottom of the mobile chassis, and a draggable handle is installed at the top of the mobile chassis, which can be dragged to any limited space area to monitor toxic and harmful gases.

[0031] The real-time emergency monitoring risk control system equipment of limited space operation with mobile pump-suction gas detection function of the present invention has the main function of realizing that the limited space operator applies for operation approval through the system before the operation. After the operation approval is passed, the operator enters the limited space on-site operation through the access control face recognition at the operation site; when working on the site, the video AI intelligent recognition is performed through the operation scene image to detect whether there are illegal intruders and dangers such as falls of on-site personnel. The outputs of the gas sensor and flowmeter inside the mobile pump-suction operation environment gas monitoring sound and light alarm are connected to the host control, and the host control is respectively connected to the sound and light alarm voice broadcast system. The host control determines whether the concentration of toxic and harmful gases and the gas flow exceed the standard by comparison. If the standard is exceeded, a control signal is sent to the sound and light alarm voice broadcast system to issue a sound and light alarm. If the standard is exceeded and there are people in the venue, a sound and light alarm and voice broadcast are issued. When the system alarms, the two-way voice intercom function of the site and the background can be realized through voice intercom. Enterprise supervisors can view the real-time video, environmental parameters, alarm events, personnel information, etc. of the operation site through the system page controlled by the host, and realize multi-level real-time control of limited space operations. Ultimately, government regulators can use the government supervision 7 functions to view the company's limited space ledger management, company operation approval records, on-site operation images and real-time alarm reminders, providing a new model of all-round and full-process control for government supervision, thereby reducing the occurrence of accidents.

[0032] The present invention can provide online real-time risk management and control for confined space operations, and has the functions of operation approval, access control, workplace imaging, voice intercom, mobile pump-suction operation environment gas monitoring sound and light alarm, host control, and government supervision. It can achieve all-round and full-process management and control from the initiation of application approval for confined space operations to the completion of the operations, thereby ensuring the safety of operators.

[0033] The host control includes a power module, an MCU module, a storage module, an RS485 communication interface, an RS232 communication interface, a network port, a 4G communication interface, an RTC real-time clock circuit, a sensor signal acquisition circuit, a switch output circuit and an input voltage detection circuit; the power module is used to supply power to other modules in the host control, the MCU module is respectively connected to the storage module, the RS485 communication interface, the RS232 communication interface, the network port, the 4G communication interface, the RTC real-time clock circuit, the sensor signal acquisition circuit, the switch output circuit and the input voltage detection circuit, and the sensor signal acquisition circuit is connected to the gas sensor and the flow meter.

[0034] The power module contains three power conversion circuits, using XL4005, AMS1117-3.3, and AMS1084 chips respectively. Figure 3 to Figure 5 As shown;

[0035] like Figure 3As shown, XL4005 is used to convert the 24V input voltage into a 5.5V voltage output; the 5th pin of XL4005 is connected to the cathode of the first Schottky diode SS34, and the anode of the first Schottky diode SS34 is connected to the DC24V input voltage; the transient diode SMBJ33CA, the first capacitor, and the second capacitor are connected in parallel, and one end of the parallel circuit is connected between the 5th pin of XL4005 and the cathode of the first Schottky diode SS34, and the other end is grounded; the 4th pin of XL4005 is connected to the 5th pin; the port connected to the transient diode SMBJ33CA and the first Schottky diode SS34 can be used as a A test signal input port; Pin 3 of XL4005 is respectively connected to the second Schottky diode SS34 and the first inductor, the other end of the second Schottky diode SS34 is grounded, and the other end of the first inductor is a voltage output end, which outputs a voltage of 5.5V; the third capacitor and the fourth capacitor are connected in parallel, and one end of the parallel capacitor is connected between the voltage output end and the first inductor, and the other end is grounded; the first resistor and the fifth capacitor are connected in parallel, and one end of the parallel circuit is connected between the voltage output end and the first inductor, and the other end is connected to Pin 2 of XL4005, and the connection end of the parallel circuit and Pin 2 of XL4005 is grounded after passing through the second resistor.

[0036] like Figure 4 As shown, AMS1117-3.3 is used to convert a 5.5V input voltage into a 3.3V voltage output, and the 3rd pin of AMS1117-3.3 is a voltage input pin, connected to the voltage input terminal; one end of the sixth capacitor is connected between the 3rd pin of AMS1117-3.3 and the voltage input terminal, and the other end is grounded; the third resistor is connected in parallel with the seventh capacitor, one end of the parallel circuit is grounded, and the other end is connected to the port connected to the ground of the sixth capacitor; the 2nd pin of AMS1117-3.3 is a voltage output pin, connected to the voltage output terminal, and outputs a voltage of 3.3V; one end of the eighth capacitor is connected between the 2nd pin of AMS1117-3.3 and the voltage output terminal, and the other end is grounded; the 1st pin of AMS1117-3.3 is grounded;

[0037] like Figure 5 As shown, AMS1084 is used to convert a 5.5V input voltage into a 5V voltage output; Pin 3 of AMS1084 is a voltage input pin, which is connected in series with the fourth resistor and connected to the voltage input terminal; one end of the ninth capacitor is connected between the fourth resistor and Pin 3 of AMS1084, and the other end is grounded; the fifth resistor, the tenth capacitor, the sixth resistor and the eleventh capacitor are connected in parallel, one end of the parallel circuit is grounded, and the other end is connected to the port connected to the ground of the ninth capacitor; Pin 2 of AMS1084 is a voltage output pin, connected to the voltage output terminal, one end of the twelfth capacitor is connected between Pin 2 of AMS1084 and the voltage output terminal, and the other end is grounded; Pin 2 of AMS1084 is grounded.

[0038] The input voltage of the device is DC24V. The input part adopts the dual protection circuit of the first Schottky diode SS34 and the transient diode SMBJ33CA. SS34 plays a role in preventing reverse connection, and SMBJ33CA plays a role in preventing surge. Then, the voltage is stepped down by the BUCK topology circuit composed of the DCDC chip XL4005 to obtain a 5.5V voltage. The two 5.5V paths pass through the LDO chip AMS111.7-3.3 to provide a stable 3.3V voltage to the MCU and other chips respectively. In order to make the collected data more accurate and stable, another path is used to power the sensor signal acquisition circuit separately, and the sensor signal acquisition circuit is powered by the LDO chip AMS1084-5.0.

[0039] like Figure 6 As shown in the figure, the MCU module uses the STM32f1 series microcontroller, which has the characteristics of low power consumption, rich resources, and powerful functions. Pins 15-18 of the STM32f1 are the input signal interface of the sensor signal acquisition circuit, and pins 41-44 are the output terminals of the control signals PEN1~PEN4 of the sensor signal acquisition circuit, and pin 29 is the input terminal of the power detection circuit.

[0040] The host control supports multiple communication methods and is suitable for various usage environments, such as RS485, RS232, Ethernet port, 4G, etc. The circuit diagrams of RS485 communication interface, RS232 communication interface, Ethernet port, and 4G communication interface are as follows: Figure 7 to Figure 10 The memory module uses the W25Q128 memory chip. Fig.11 As shown. The RTC real-time clock circuit uses the SD2058 chip. Fig.12 shown.

[0041] like Fig.13As shown, the sensor signal acquisition circuit uses the GS8552 chip as an operational amplifier. Pins 3 and 4 of the GS8552 chip are ADC+ input pins and ADC- input pins, respectively, and pin 1 is the ADC output pin. Pin 8 is connected to a capacitor and then connected to a 5V voltage; Pin 2 of the GS8552 chip is connected to pin 1; a resistor and a capacitor are connected in parallel, and then one end of the parallel circuit is connected between pin 1 of the SD2058 chip and the ADC+ input terminal, and the other end of the parallel circuit is connected between pin 4 of the SD2058 chip and the ADC- input terminal. At the same time, a resistor is connected in series between the parallel circuit and the ADC- input terminal, and the end of the parallel circuit connected to pin 4 of the GS8552 chip is grounded. The current signal output by the sensor signal is input to both ends of the sampling resistor R57A through ADC+ and ADC- to form a voltage signal, and then filtered by the filter capacitor C56A, and finally passed through the voltage follower circuit composed of an operational amplifier. This circuit has the characteristics of high input impedance and low output impedance, so that a more stable signal is transmitted to the controller.

[0042] like Fig.14 As shown in the figure, the switch output circuit is composed of the optocoupler EL817 and PmosAO3407, and CTRL is the IO port of the microcontroller; when CTRL is at a low level, the light-emitting diode D15A lights up, and the optocoupler EL817 is turned on. The gate voltage VG of AO3407 is less than the source voltage of AO3407 after being divided by R64 and R63A, and A03407 is turned on, and OP-Signal+ and OP-Signal- are turned on. On the contrary, when CTRL is at a high level, OP-Signal+ and OP-Signal- are turned off.

[0043] like Fig.15 As shown, the input voltage detection circuit includes a transient diode SMBJ22CA and an optocoupler EL817; the light-emitting diode is connected in series with a resistor, and then the series circuit is connected in parallel with the transient diode SMBJ22CA; then the two ends of the parallel circuit are used as signal input ends, and the two ends of the parallel circuit are respectively connected to the two input ports of the optocoupler EL817; one of the two output ends of the optocoupler EL817 is grounded, and the other is an output signal interface; a 3.3V voltage is connected between the output signal interface and the optocoupler EL817 through a resistor. The transient diode plays a protective role to prevent the input voltage from being too high and burning the optocoupler. When Signal+ is high and Signal- is low, the light-emitting diode D17A lights up, EL817 is turned on, and Check outputs a low level to the IO port of the microcontroller. Otherwise, Check outputs a low level to the IO port of the microcontroller.

[0044] The operation approval function is developed based on the common problems of enterprises such as no approval before confined space operations, irregular operation approval, or irregular third-party contracting management. The approval and licensing conditions for confined space operations are itemized, electronic, and process-based, and the confined space units and third-party units are managed in a unified system. The entire operation process is managed through online operation approval, thereby realizing the informatization, standardization, and procedural management of the entire process of confined space operation initiation, on-site gas analysis, safety disclosure, operation ticket approval, on-site layout and monitoring, and supporting data exchange with higher-level regulatory departments.

[0045] The access control function is developed based on the problems of irregular management of workers in limited spaces, random entry and exit of irrelevant personnel, and lack of physical isolation measures. This function is associated with job approval data. When working in a limited space, authorized personnel can enter through the face recognition machine installed in the workplace to achieve strict control of their working time. When irrelevant personnel enter, they cannot pass the authentication and are refused to be released. In addition, when the operator is working, if the scheduled time is exceeded, the system will trigger voice prompts such as pre-end, end, and timeout of the working time. At the same time, the system will also pop up a prompt to remind the end of the time to remind the operators and managers that their working time has exceeded.

[0046] The workplace imaging function is developed based on the problems of unimplemented monitoring of confined space operations, irregular monitoring, and poor emergency response capabilities of monitoring personnel. It is realized through camera and AI recognition, and can watch the current work site monitoring screen in real time, and detect whether there are illegal intruders and falls of on-site personnel through AI, and trigger system alarms, voice broadcasts or alarm lights through system linkage to improve rescue efficiency and shorten rescue time. Other recognition content can be added later, such as scenes where operators fail to wear labor protection equipment correctly, illegal operations, and guardians leave the site without authorization.

[0047] The voice intercom function is developed based on the problems of no warning signs in limited spaces, untimely emergency response, and blind rescue. It is achieved through the intercom system and linkage with various event triggers. When the system captures excessive gas or dangerous behavior of personnel, it identifies different alarm events and prompts different alarm voice prompts. It also allows operators to quickly initiate a help signal in an emergency. Rescuers can communicate with the trapped people immediately, understand the situation on the scene, guide self-rescue measures, and coordinate internal and external rescue resources.

[0048] The host control function is developed based on the problems of inadequate safety management and on-site monitoring of confined space operations. By setting up background host supervision in the enterprise duty room or leadership office, real-time video, environmental parameters, alarm events, personnel information, etc. of the operation site can be viewed through the host page, realizing multi-level real-time control of confined space operations.

[0049] The government supervision function is developed based on the difficulty of government supervision of enterprises and the unclear number of limited space accounts. Government supervisors can view the limited space account management, enterprise operation approval records, on-site operation pictures and real-time alarm reminders through the system, providing a new model of all-round and full-process control for government supervision, thereby reducing accidents.

[0050] The seven functional inputs and outputs of operation approval, access control, workplace imaging, voice intercom, mobile pump-suction operation environment gas monitoring sound and light alarm, host control, and government supervision are all connected through the data transmission unit, which interconnects the seven functions of this system.

[0051] Those skilled in the art will appreciate that the embodiments described herein are intended to help readers understand the principles of the present invention, and should be understood that the protection scope of the present invention is not limited to such specific statements and embodiments. Those skilled in the art can make various other specific variations and combinations that do not deviate from the essence of the present invention based on the technical revelations disclosed by the present invention, and these variations and combinations are still within the protection scope of the present invention.

Claims

1. Real-time emergency monitoring and risk management system for confined space operations, characterized by: It includes an operation approval system, an access control system, an operation scene imaging system, a mobile pump-suction operation environment gas monitoring sound and light alarm system, and a host control. The host control is connected to the operation approval system, the access control system, the operation scene imaging system, and the mobile pump-suction operation environment gas monitoring sound and light alarm system through a data transmission unit.

2. The real-time emergency monitoring risk management system for confined space operations according to claim 1 is characterized in that: The mobile pump-suction working environment gas monitoring sound and light alarm includes a mobile chassis and a retractable gas sampling disk, a sampling pump, a dehumidification filter, a three-way valve, a flow meter and a battery installed in the mobile chassis; the battery is used to power the sampling pump, the flow meter, the body sensor and the dehumidification filter; the sampling pump is installed on the retractable gas sampling disk, and extends to any position inside the mobile chassis through the retractable gas sampling disk, and the gas sample is sucked by the sampling pump; the gas sample is deslagging and drying after passing through the dehumidification filter, and then connected to the flow meter and the gas sensor respectively through the three-way valve; the outputs of the flow meter and the gas sensor are both connected to the host control.

3. The real-time emergency monitoring risk management system for confined space operations according to claim 1 is characterized in that: The host control includes a power module, an MCU module, a storage module, an RS485 communication interface, an RS232 communication interface, a network port, a 4G communication interface, an RTC real-time clock circuit, a sensor signal acquisition circuit, a switch output circuit and an input voltage detection circuit; the power module is used to supply power to other modules in the host control, the MCU module is respectively connected to the storage module, the RS485 communication interface, the RS232 communication interface, the network port, the 4G communication interface, the RTC real-time clock circuit, the sensor signal acquisition circuit, the switch output circuit and the input voltage detection circuit, and the sensor signal acquisition circuit is connected to the gas sensor and the flow meter.

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