A confined space worker safety monitoring system

Abstract

The utility model belongs to the technical field of operation safety monitoring, specifically relates to a limited space operation personnel safety monitoring system. The system includes mobile display terminal and information perception end, and the information perception end includes respirator face guard, is equipped with the respiratory pressure monitoring unit for monitoring operation personnel breathing state in respirator face guard, and mobile display terminal communication connection respiratory pressure monitoring unit and shows operation personnel breathing state with graphical interface. The respiratory pressure monitoring unit in respirator face guard can accurately, real -time obtain operation personnel's respiratory pressure state data, and mobile display terminal shows operation personnel's breathing state through graphical interface in real time, thereby in the operation process, real -time, accurate judgement operation personnel's physical condition whether there is exception, and then can discover risk in time and take corresponding measure, realize " early discovery early rescue ";The accuracy of real -time monitoring of operation personnel safety is improved, and the life safety of operation personnel is ensured.

Description

Technical Field

[0001] This utility model belongs to the field of work safety monitoring technology, specifically relating to a safety monitoring system for workers in confined spaces. Background Technology

[0002] Confined spaces refer to enclosed or partially enclosed spaces with restricted access but accessible to personnel. These spaces are not designed as fixed workplaces, have poor ventilation, and are prone to accumulating toxic, harmful, flammable, or explosive substances, or experiencing insufficient oxygen levels. They are characterized by limited space and relative isolation from the outside world. Examples include various enclosed equipment (kilns, storage tanks, pipelines, etc.) and underground or above-ground locations or spaces such as tunnels, pits, wells, and cellars. Confined space work refers to work performed by personnel within a confined space. Common confined space work involves cleaning and tidying operations, such as dredging sewage wells or cleaning fermentation tanks; equipment installation, replacement, and maintenance operations, such as replacing equipment in sewage regulating tanks; painting, corrosion prevention, and waterproofing operations, such as corrosion prevention work inside storage tanks; and inspection and maintenance operations, such as inspecting manholes and heating pipe trenches. Confined space work environments are complex, with numerous hazardous factors, making them prone to accidents and serious consequences. Rescue of workers in distress is difficult, and blind rescue attempts or improper rescue methods can easily exacerbate injuries and fatalities.

[0003] To ensure safety when working in confined spaces, the confined space is typically inspected before work begins to eliminate hazards, and continuous, real-time monitoring is conducted during the work. For example, Chinese invention patent application CN112435419A, published on March 2, 2021, discloses a safety monitoring device for personnel working in confined spaces. This device includes a wearable wristband and a mobile terminal. The processor module of the wristband calculates the instantaneous acceleration or deceleration of the wristband as it deviates from its original spatial position and sends corresponding action signals to the mobile terminal. The mobile terminal includes a signal module and an alarm. The signal module receives the action signals and sends corresponding processing signals to the work unit and the alarm. The processor module and the alarm receive the processed signals and perform corresponding alarm processing based on the type of processed signal. The system judges the worker's condition by measuring the instantaneous acceleration or deceleration of the wristband as it deviates from its original spatial position. However, this assessment primarily relies on hand movements, which cannot accurately reflect the worker's physiological or vital signs during operation. This leads to misjudgments and false alarms, resulting in poor accuracy. For example, workers may not exhibit noticeable instantaneous acceleration or deceleration due to slow tilting or gradual physical discomfort causing sluggish movements. The wristband may not accurately detect this, leading to delayed alarms and compromising worker safety. Furthermore, during actual operations, workers may perform normal, instantaneous acceleration or deceleration movements, which could be misjudged as dangerous, triggering unnecessary alarms and disrupting normal operations. Utility Model Content

[0004] The purpose of this invention is to provide a safety monitoring system for workers in confined spaces, in order to solve the problems of misjudgment of actions and missed detection of dangers that may occur when existing safety monitoring devices for workers in confined spaces rely on hand movements for monitoring.

[0005] To achieve the above objectives, the confined space operation personnel safety monitoring system of this utility model adopts the following technical solution: A safety monitoring system for workers in confined spaces includes a mobile display terminal and an information sensing terminal. The information sensing terminal includes a respirator mask, and the respirator mask is equipped with a breathing pressure monitoring unit for monitoring the breathing status of workers. The mobile display terminal is communicatively connected to the breathing pressure monitoring unit and displays the breathing status of workers in a graphical interface.

[0006] Furthermore, the mobile display terminal is also communicatively connected to a motion monitoring unit for monitoring the movement status of the operator, and the motion monitoring unit is fixed to the operator's shoulder.

[0007] Furthermore, the mobile display terminal includes an operation display interface, which is configured with a breathing simulation unit and a pressure display unit. The breathing simulation unit is used to simulate and display the breathing state of the operator, and the pressure display unit is used to display the real-time pressure inside the respirator mask.

[0008] Furthermore, the respirator mask is a positive pressure air respirator mask, and the breathing pressure monitoring unit is fixed inside the respirator mask and close to the operator's mouth and nose.

[0009] Furthermore, the respiratory pressure monitoring unit is a micro-pressure sensor.

[0010] Furthermore, the motion state monitoring unit includes a clock timer and a micro-motion sensor.

[0011] Furthermore, the mobile display terminal also includes an audible and visual alarm module, which is used to receive monitoring signals from the respiratory pressure monitoring unit and issue audible and visual alarm signals in stages according to preset thresholds.

[0012] Furthermore, the operation display interface is also equipped with a communication status display unit, which is used to display the communication status between the respiratory pressure monitoring unit and the mobile display terminal.

[0013] Furthermore, the monitoring system also includes detection sensors for monitoring environmental parameters, and the operation display interface is also equipped with an environmental parameter display unit for displaying environmental parameters within a confined space in real time.

[0014] Furthermore, the respirator mask is also equipped with an alarm module for alerting workers of risks, and the alarm module is communicatively connected to the mobile display terminal.

[0015] The beneficial effects of this utility model are as follows: The confined space worker safety monitoring system provided by this utility model is an improvement on existing technology. This utility model judges the dynamic changes in the worker's physical condition by monitoring changes in the vital characteristic of human respiration. Through a breathing pressure monitoring unit installed inside the respirator mask, it can accurately and in real-time acquire the worker's breathing pressure status data. A mobile display terminal displays the worker's breathing status in real-time through a graphical interface. Therefore, during the operation, monitoring personnel rely on the mobile display terminal to continuously monitor changes in the worker's breathing pressure, judge in real-time whether there are any abnormalities in the worker's breathing, and thus accurately judge the worker's physical condition, promptly detect risks, and take corresponding measures to achieve "early detection and early rescue." Compared with existing technologies, the respirator mask integrated with breathing pressure monitoring and combined with the graphical display on the mobile terminal provided by this utility model reduces the probability of misjudgment, missed judgment, and false alarms, improves the accuracy of real-time monitoring of worker safety, and ensures the safety of workers. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the confined space operation personnel safety monitoring system of this utility model; Figure 2 This is a schematic diagram of the operation display interface of the mobile display terminal of the confined space operation personnel safety monitoring system of this utility model; Figure 3 This is a side view of a mobile display terminal in the confined space worker safety monitoring system of this utility model; Figure 4 This is a schematic diagram of a breathing pressure monitoring unit in the confined space worker safety monitoring system of this utility model.

[0017] In the diagram: 1. Information sensing terminal; 11. Respirator mask; 12. Respiratory pressure monitoring unit; 121. Air pressure detection unit; 122. Fastening nut; 123. Working indicator light; 124. Micro-pressure sensor body; 13. Motion status monitoring unit; 14. First audible and visual alarm module; 2. Mobile display terminal; 20. Signal receiving and processing module; 21. Operation display interface; 211. Air pressure display unit; 212. Respiratory simulation unit; 213. Communication status display unit; 214. Environmental parameter display unit; 215. Parameter setting unit; 22. Display module; 23. Second audible and visual alarm module; 231. Buzzer; 24. Timing module; 25. Power supply. Detailed Implementation

[0018] The features and performance of this utility model will be further described in detail below with reference to the embodiments.

[0019] This utility model provides a safety monitoring system for workers in confined spaces. Based on the monitoring of changes in the vital characteristic of human respiration, it judges the dynamic changes in the worker's physical condition. Specifically, it accurately and in real time obtains the worker's respiratory pressure status data through a respiratory pressure monitoring unit installed in the respirator mask, and displays the worker's breathing status in real time through a graphical interface of a mobile display terminal. Thus, during the operation, the mobile display terminal can judge the worker's physical condition in real time and accurately.

[0020] An embodiment of a confined space operation personnel safety monitoring system according to this utility model: refer to Figure 1 As shown, this embodiment provides a safety monitoring system for workers in confined spaces, including a mobile display terminal 2 and an information sensing terminal 1. The information sensing terminal 1 includes a respirator mask 11 and a breathing pressure monitoring unit 12 disposed inside the respirator mask 11 for monitoring the breathing status of workers. The mobile display terminal 2 is communicatively connected to the breathing pressure monitoring unit 12 and displays the breathing status of workers through a graphical interface.

[0021] In the above embodiment, the breathing pressure monitoring unit is installed inside the respirator mask 11. Combined with the relatively enclosed space of the respirator mask 11, when the worker experiences shortness of breath or difficulty breathing, the breathing pressure data will show significant changes. The breathing pressure monitoring unit 12 promptly captures these changes, thereby accurately and in real-time obtaining the worker's physical condition. The mobile display terminal 2 displays the worker's breathing status in real-time through a graphical interface. During operation, monitoring personnel can rely on the mobile display terminal 2 to continuously monitor changes in the worker's breathing pressure, determine in real-time whether there are any abnormalities in the worker's physical condition, identify the worker's status, and thus promptly detect risks and take corresponding measures, achieving "early detection and early rescue." Compared with the prior art, the respirator mask 11 provided by this utility model, which integrates breathing pressure monitoring and combines it with a mobile terminal graphical display, improves the accuracy of real-time monitoring of worker safety and ensures the worker's life safety.

[0022] In this embodiment, the respirator mask 11 is a positive pressure respirator mask, and the breathing pressure monitoring unit 12 is a micro-pressure sensor. The micro-pressure sensor is fixed inside the respirator mask 11 and close to the operator's mouth and nose. In use, the micro-pressure sensor acquires the air pressure change inside the respirator mask 11 and converts the acquired air pressure value into a communication signal, which is transmitted to the mobile display terminal 2. The mobile display terminal 2 displays the real-time pressure status inside the respirator mask 11 through a graphical interface.

[0023] The positive pressure respirator mask 11 is a known existing product or technology, and its structure will not be described in detail in this embodiment. The micro-pressure sensor in this embodiment refers to a pressure sensor with a range of ±2 kPa. This type of sensor has extremely high sensitivity and can generate a large electrical signal output under low pressure. (Reference) Figure 4 As shown, the micro-pressure sensor used in this embodiment includes a pressure detection unit 121 for collecting the pressure inside the respirator mask 11, a micro-pressure sensor body 124 for processing the collected signals, and a working indicator light 123 for reflecting the working status of the micro-pressure sensor. The pressure detection unit 121 has an external thread section, and a fastening nut 122 engages with the external thread section to fix the micro-pressure sensor inside the respirator mask 11. It should be understood that this is only an example of the structure of the micro-pressure sensor and does not limit the specific structure or shape of the micro-pressure sensor. Other known products or technologies can also be used as the micro-pressure sensor in this embodiment, which will not be described in detail here. In other embodiments, the respirator mask 11 can be a respirator suitable for confined space operations, such as a supplied-air long-tube respirator.

[0024] In the above embodiment, placing the micro-pressure sensor inside the respirator mask 11 and close to the worker's mouth and nose ensures that the micro-pressure sensor is always in the optimal position, close to the breathing channel. Combined with the relatively enclosed space of the respirator mask, when the worker experiences shortness of breath or difficulty breathing, the breathing pressure data will change significantly. The micro-pressure sensor can capture these changes in a timely manner, thereby accurately and in real time obtaining the worker's breathing pressure data, and thus more accurately reflecting the worker's physical condition.

[0025] To improve the accuracy of safety monitoring of workers, as a further implementation, the information sensing terminal 1 also includes a motion state monitoring unit 13. This unit monitors a micro-motion sensor worn by the worker, which is communicatively connected to a mobile display terminal 2. The micro-motion sensor, combined with a clock timer, constitutes the motion state monitoring unit 13 for monitoring the worker's movement. Specifically, the micro-motion sensor is fixed to the worker's shoulder via a shoulder strap or a dedicated wearing device to ensure that the sensor does not loosen or shift during operation. The shoulder is an important part of the human body, reflecting the worker's movement and posture. Wearing the micro-motion sensor on the worker's shoulder effectively monitors the worker's upper body movements and posture changes. Alternatively, the micro-motion sensor can be worn on the respirator mask 11 or other locations that easily reflect the worker's movements and body posture. The micro-motion sensor can also be an integrated micro-motion sensor with an integrated clock timer. The micro-motion sensor is a known existing product or technology, and will not be described in detail in this embodiment. By using the micro-motion sensor in conjunction with the clock timer to determine the worker's movement state within a specific time period, the dynamic characteristics of the worker can be confirmed, further improving the functionality and safety of the monitoring system provided by this invention.

[0026] In this embodiment, the respiratory pressure monitoring unit 12 and the motion status monitoring unit 13 work together. By integrating the data from the motion status monitoring unit 13 and the respiratory pressure monitoring unit 12, a comprehensive assessment of the worker's physical condition and working status within a confined space can be achieved. For example, when the respiratory pressure monitoring unit 12 indicates that the worker is breathing rapidly, and the motion status monitoring unit 13 simultaneously displays abnormal changes such as excessive movement intensity or inactivity, it is possible to more accurately determine whether the worker is facing a potential danger, providing a strong basis for timely action. It also effectively avoids misjudgments that may arise from relying solely on respiratory monitoring, such as the respiratory monitoring unit failing to accurately determine whether the worker's breathing abnormality is due to physical exertion or other factors. However, by combining the motion status data monitored by the motion status monitoring unit 13, a clearer understanding of the worker's actual situation can be obtained.

[0027] In other embodiments, only one of the respiratory pressure monitoring unit 12 or the motion status monitoring unit 13 may be configured.

[0028] In this embodiment, various sensors of the information sensing terminal 1, such as the respiratory pressure monitoring unit 12 and the motion state monitoring unit 13, are connected to the mobile display terminal 2 via wireless communication methods such as Bluetooth and ZigBeet.

[0029] The mobile display terminal 2 includes a signal receiving and processing module 20, a display module 22, a second audible and visual alarm module 23, a timing module 24, and a power supply 25. It should be noted that the components of the mobile display terminal 2 listed in this embodiment are merely illustrative and do not constitute a limitation on the structure of the mobile display terminal 2.

[0030] The signal receiving and processing module 20 is communicatively connected to the display module 22, the second audible and visual alarm module 23, and the timing module 24, and is used to receive data signals collected by sensors such as micro-pressure sensors and micro-motion sensors; the power supply module 25 provides power to each module; the timing module 24 includes a clock timer; and a reference... Figure 3 As shown, the second audible and visual alarm module 23 includes a buzzer 231 located on one side of the mobile display terminal 2, and an alarm light for warning purposes (not shown in the figure).

[0031] refer to Figure 2 As shown, the display module 22 includes an operation display interface 21, which is equipped with a breathing simulation unit 212, a pressure display unit 211, and a parameter setting unit 215. The breathing simulation unit 212 simulates and displays the breathing state of the operator, while the pressure display unit 211 displays the real-time pressure inside the respirator mask 11. Specifically, the breathing simulation unit 212 converts breathing state information into an intuitive visual display through specific graphical or numerical changes; the pressure display unit 211 displays the pressure inside the respirator mask 11 in numerical or graphical form, accurately and in real-time displaying the current pressure value, and allows setting upper and lower limits for the pressure range as needed; the parameter setting unit 215 is used to set the display parameters of each display unit.

[0032] The visual display of the breathing simulation unit 212 helps on-site monitoring personnel accurately grasp and quickly understand the real-time breathing status of workers. It also allows monitoring personnel to quickly determine whether the worker's breathing is normal without requiring specialized medical knowledge, thus improving the system's usability. The breathing simulation unit 212 and the air pressure display unit 211 together constitute the worker's breathing status monitoring and display system. The breathing simulation unit 212 graphically displays the breathing process, while the air pressure unit provides specific numerical references. The combination of these two elements helps monitoring personnel comprehensively understand the worker's breathing status, thereby assessing their physical condition and further enhancing the safety monitoring capabilities of the monitoring system provided by this invention.

[0033] In this embodiment, the second audible and visual alarm module 23 receives the first monitoring signal from the breathing pressure monitoring unit 12 and issues audible and visual alarm signals according to preset threshold levels. Specifically, when the pressure inside the respirator mask 11 exceeds a preset pressure range, such as when the real-time pressure inside the respirator mask 11 exceeds 5% of the preset threshold, the pressure display unit 211 can highlight the signal (e.g., flashing or changing brightness) or issue a low-pitched buzzer and a continuously lit yellow warning light through the second audible and visual alarm module 23; when the real-time pressure inside the respirator mask 11 exceeds 10% of the preset threshold, the pressure display unit 211 can highlight the signal or issue a high-pitched buzzer and a flashing red warning light through the second audible and visual alarm module 23. It should be understood that the graded alarm method for pressure exceeding the preset threshold in this embodiment is only an example, and the specific settings should be reasonably configured according to actual conditions.

[0034] In another implementation, the second audible and visual alarm module 23 receives the second monitoring signal from the motion status monitoring unit 13 and issues audible and visual alarm signals according to preset threshold levels. Specifically, if the micro-motion sensor does not detect vibration within 5 seconds, the second audible and visual alarm module 23 of the mobile display terminal 2 emits a low-pitched buzzer and a continuously lit yellow warning light to alert external monitoring personnel to pay attention, determine the situation of the personnel working in the confined space, and prepare for rescue; if the micro-motion sensor does not detect vibration within 15 seconds, the second audible and visual alarm module 23 of the mobile display terminal 2 emits a high-pitched buzzer and a flashing red warning light. At this time, external monitoring personnel should immediately begin rescue operations for the personnel working in the confined space to ensure the safety of the personnel.

[0035] In other embodiments, the second audible and visual alarm module 23 can simultaneously receive monitoring signals from the motion status monitoring unit 13 and the respiratory pressure monitoring unit 12, and combine the signals from both to generate a more accurate alarm signal. Of course, the second audible and visual alarm module 23 can receive monitoring signals from both the motion status monitoring unit 13 and the respiratory pressure monitoring unit 12, or only one of them, depending on the actual application scenario.

[0036] In the above embodiments, the second audible and visual alarm module 23, based on the monitoring signals from the motion state monitoring unit 13 and / or the breathing pressure monitoring unit 12, indicates an abnormal state affecting personal safety when the worker's breathing pressure or motion state exceeds a preset safety threshold. External monitoring personnel can quickly determine whether the worker is in danger and initiate rescue procedures in a timely manner, reducing ineffective rescue preparation time and improving rescue efficiency. At the same time, monitoring personnel can also rationally allocate the worker's working time based on changes in the monitored breathing pressure and motion state signals, providing support for precise operations and further ensuring the worker's life safety.

[0037] To monitor the communication connection status between each sensor and the mobile display terminal 2 in real time, this embodiment also includes a communication status display unit 213 on the operation display interface 21. This unit displays the communication status between the motion monitoring unit 13 and the respiratory pressure monitoring unit 12 and the mobile display terminal 2. Specifically, the communication status display unit 213 can display the communication status between the motion monitoring unit 13 and the respiratory pressure monitoring unit 12 and the mobile display terminal 2 using various methods such as color, icons, or text. A suitable display method can be selected based on actual needs, and this embodiment does not limit this. Of course, the communication status between multiple monitoring units, including the motion monitoring unit 13 and the respiratory pressure monitoring unit 12, and the mobile display terminal 2 can be displayed separately. The operation display interface 21 can be reasonably configured according to specific needs. By displaying the communication connection status in real time, monitoring personnel can understand whether data transmission is normal at any time, avoiding data loss or misjudgment due to communication failures, thus improving the overall reliability of the system. Simultaneously, it helps monitoring personnel better manage the work process and improve work safety. For example, if the communication status is unstable, work can be paused until communication is restored, reducing work interruptions caused by communication failures and preventing monitoring personnel from failing to detect abnormalities in workers due to communication anomalies.

[0038] As a further implementation, the information sensing terminal 1 also includes detection sensors for monitoring environmental parameters. Simultaneously, the operation display interface 21 is equipped with an environmental parameter display unit 214 for real-time display of environmental parameters within the confined space. Specifically, the respirator mask 11 is equipped with environmental parameter detection sensors for monitoring the composition and content of gases in the confined space, such as combustible gases, carbon monoxide, hydrogen sulfide, and other harmful gases, as well as oxygen, and environmental parameters such as temperature and humidity. These environmental parameter detection sensors are communicatively connected to the mobile display terminal 2 to display the environmental conditions within the confined space in real-time on the environmental parameter display unit 214 of the mobile display terminal 2. Of course, the environmental parameter detection sensors can also be installed on other equipment carried by the operator, preferably for easy detection without interfering with the operation. By installing these environmental parameter detection sensors, environmental parameters within the confined space can be monitored in real-time and displayed through the environmental parameter display unit 214, helping monitoring personnel to promptly understand changes in the working environment, detect potential hazards in a timely manner, and thus improve emergency response capabilities.

[0039] As a further implementation, the information sensing terminal 1 also includes an air quality detection sensor fixed inside the respirator mask 11 and used to detect the air quality inside the respirator mask 11. This enables real-time monitoring of the air quality inhaled by the operator, ensuring their breathing safety; it also facilitates the timely detection of potential hazards or equipment malfunctions, such as oxygen deficiency or poisoning caused by mask or oxygen supply system failures.

[0040] As a further implementation, the information sensing terminal 1 also includes a first audible and visual alarm module 14 for alerting workers to risks. The first audible and visual alarm module 143 includes a warning light and a horn on the respirator mask 11 for alerting workers to risks, and is communicatively connected to the mobile display terminal 2. Specifically, the warning light can receive environmental parameter signals monitored by the processed environmental parameter display unit. If environmental parameters such as the concentration of harmful gases or temperature in the confined space exceed a preset safety threshold, the warning light will alert workers to the risks. Simultaneously, the horn will play warning information to workers, such as suspending work or evacuating, reminding workers to avoid potential risks. Positioning the warning light on the respirator mask 11 within the worker's field of vision ensures that workers receive the warning signal immediately, without needing to shift their gaze or take any action to check other warning devices.

[0041] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some technical features, or organically combine different specific implementation methods to create the specific implementation methods shown in the accompanying drawings. Of course, those skilled in the art can also create other specific implementation methods not shown in the accompanying drawings. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A confined space worker safety monitoring system comprising a mobile display terminal and an information perception terminal, characterized in that: The information sensing terminal includes a respirator mask, which contains a breathing pressure monitoring unit for monitoring the breathing status of the worker. The mobile display terminal is communicatively connected to the breathing pressure monitoring unit and displays the worker's breathing status in a graphical interface. The mobile display terminal is also communicatively connected to a motion monitoring unit for monitoring the worker's movement status.

2. The confined space worker safety monitoring system of claim 1, wherein: The motion monitoring unit is fixed to the worker's shoulder.

3. The confined space worker safety monitoring system of claim 1 or 2, wherein: The mobile display terminal includes an operation display interface, which is equipped with a breathing simulation unit and a pressure display unit. The breathing simulation unit is used to simulate and display the breathing state of the operator, and the pressure display unit is used to display the real-time pressure inside the respirator mask.

4. The confined space worker safety monitoring system of claim 1, wherein: The respirator mask is a positive pressure air respirator mask, and the breathing pressure monitoring unit is fixed inside the respirator mask and close to the operator's mouth and nose.

5. The confined space worker safety monitoring system of claim 1 or 4, wherein: The respiratory pressure monitoring unit is a micro-pressure sensor.

6. The confined space worker safety monitoring system of claim 2, wherein: The motion state monitoring unit includes a clock timer and a micro-motion sensor.

7. The confined space worker safety monitoring system according to claim 3, characterized in that: The mobile display terminal also includes an audible and visual alarm module, which is used to receive monitoring signals from the respiratory pressure monitoring unit and issue audible and visual alarm signals in stages according to preset thresholds.

8. The confined space operation personnel safety monitoring system according to claim 3, characterized in that: The operation display interface is also equipped with a communication status display unit, which is used to display the communication status between the respiratory pressure monitoring unit and the mobile display terminal.

9. The confined space operation personnel safety monitoring system according to claim 3, characterized in that: The monitoring system also includes detection sensors for monitoring environmental parameters, and the operation display interface is also equipped with an environmental parameter display unit for displaying environmental parameters within a confined space in real time.

10. The confined space worker safety monitoring system according to claim 1 or 4, characterized in that: The respirator mask is also equipped with an alarm module for alerting workers of risks, and the alarm module is communicatively connected to the mobile display terminal.

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