Intelligent safety monitoring system and method for limited space

Abstract

The invention provides an intelligent safety monitoring system and method for a limited space, and relates to the technical field of safety monitoring, the safety monitoring system comprises a gas detection module, an alarm control module and a monitoring management module, the gas detection module comprises a gas detection transmitter, the gas detection transmitter is arranged in the limited space, and the alarm control module is connected with the monitoring management module; the gas sensor is used for detecting gas concentration in a limited space; the alarm control module is in communication connection with the gas detection module, the alarm control module is arranged outside the limited space, and the alarm control module is used for giving an alarm to remind a worker when detecting that the gas concentration is abnormal; the monitoring management module at least comprises a camera shooting unit and a display unit, and the camera shooting unit captures real-time pictures in the limited space and transmits the pictures to the display unit to be displayed. The concentration of toxic and harmful gas in the limited space can be monitored in real time, early warning is carried out in time when the gas concentration is abnormal, and meanwhile the state of constructors can be known in real time.

Description

Technical Field

[0001] The present invention relates to the technical field of safety monitoring, and in particular to an intelligent safety monitoring system and method for a limited space. Background Art

[0002] Confined spaces in municipal engineering projects such as culverts are closed or semi-closed, and are prone to accumulation of toxic and harmful, flammable and explosive substances or oxygen-deficient space environments, so they are not suitable for workers to stay and work for a long time. In recent years, the continuous renewal and development of cities have also put forward higher requirements for municipal infrastructure. With the continuous increase in related construction, inspection, maintenance and other work, the increasing complexity of various operations in confined spaces of municipal engineering projects, related accidents have also occurred frequently, and the safety management of confined space operations has continued to present a high-risk situation. During the confined space operation process, the dangerous and harmful factors in the workplace should be regularly detected or continuously monitored.

[0003] At present, the common practice at production sites is to use gas detectors to detect the content of toxic, harmful, flammable and explosive gases in confined spaces before entering the confined space for operations. The commonly used gas detectors in engineering have a single function and can often only detect a certain type or category of gas, and cannot comprehensively monitor a variety of potentially dangerous gases in the working environment. Secondly, the gas detectors carried by workers have poor detection effects and cannot achieve real-time monitoring of the entire operation process. In the event of emergencies such as gas leaks, alarms cannot be issued in time, and internal conditions cannot be known in time, thereby delaying the timing of emergency response. Therefore, there is currently a lack of dynamic monitoring of the working environment and the status of operators in confined spaces under complex conditions. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the present invention provides an intelligent safety monitoring system and method for confined spaces, which effectively solves the current problem of lack of dynamic monitoring of the working environment and the status of operators in confined spaces under complex conditions.

[0005] In a first aspect, the present invention provides an intelligent safety monitoring system for a limited space, the safety monitoring system comprising a gas detection module, an alarm control module and a monitoring management module, wherein: The gas detection module includes a gas detection transmitter, which is arranged inside the limited space and is used to detect the gas concentration inside the limited space; The alarm control module is in communication connection with the gas detection module, the alarm control module is arranged outside the limited space, and the alarm control module is used to alarm to remind the staff when the abnormal gas concentration is detected; The monitoring and management module includes at least a camera unit and a display unit. The camera unit is arranged inside the limited space, and is used to obtain a real-time image inside the limited space. The camera unit is communicatively connected to the display unit, and the display unit is used to receive the real-time image for display.

[0006] Furthermore, the gas detection transmitter comprises at least a housing, a sensor, a relay, a zero adjustment potentiometer and a control unit, wherein: The sensor is arranged at the lower part of the housing, and the sensor is used to detect the gas concentration inside the limited space; The relay, the zero adjustment potentiometer and the control unit are arranged inside the housing, and the control unit is connected to the sensor to receive the gas concentration and determine whether the gas concentration is greater than a set threshold; The relay is connected to the control unit. If the control unit determines that the gas concentration is greater than the set threshold, the relay is controlled to close and a current signal is sent to the alarm control module. The zero adjustment potentiometer is connected to the sensor, and the zero adjustment potentiometer is used to adjust the zero point output of the sensor.

[0007] Furthermore, the sensor is an electrochemical sensor, which is used to react with the gas to be measured inside the limited space and generate an electrical signal proportional to the concentration of the gas.

[0008] Furthermore, the alarm control module at least includes an audible and visual alarm unit, the audible and visual alarm unit is communicatively connected to the relay, and the audible and visual alarm unit is used to receive the current signal for audible and visual warning.

[0009] Furthermore, the safety monitoring system also includes a communication module, and the communication module includes a first communication unit and a second communication unit, the first communication unit is arranged outside the confined space, and the second communication unit is arranged inside the confined space.

[0010] Furthermore, the first communication unit is an IP microphone, the second communication unit is an IP speaker, and the IP microphone is communicatively connected to the IP speaker.

[0011] Furthermore, the security monitoring system also includes a background management module, which is communicatively connected to the alarm control module and the monitoring management module respectively, and is used to receive data transmitted by the alarm control module and the monitoring management module for remote management.

[0012] In a second aspect, the present invention provides an intelligent safety monitoring method for a confined space, the method being applied to the intelligent safety monitoring system for a confined space described in the first aspect of the present invention, the safety monitoring method comprising: Performing gas detection inside the limited space through a gas detection module to obtain the gas concentration inside the limited space; If the gas concentration exceeds the set threshold, the gas detection module sends a current signal to the alarm control module for sound and light alarm; The camera unit of the monitoring management module obtains the real-time picture inside the limited space, and transmits the real-time picture to the display unit for picture display.

[0013] Furthermore, the method further comprises: If the alarm control module performs an audible and visual alarm, a voice warning is performed through the communication module.

[0014] Furthermore, the method further comprises: The monitoring management module transmits the real-time images to the background management module for remote management.

[0015] The intelligent safety monitoring system and method for limited space provided by the present invention can monitor the concentration value of toxic and harmful gases in the limited space in real time through the gas detection transmitter. The gas detection transmitter adopts an electrochemical sensor and uses the principle of controlled potential electrolysis to accurately and stably measure the concentration of the measured gas, and output the corresponding current signal for real-time monitoring, which has the advantages of high sensitivity, rapid response, long service life and short polarization time. By real-time monitoring of the gas concentration in the limited space, external supervisors can timely discover toxic and harmful gases and reduce the safety threats to operators due to excessive concentrations of toxic and harmful gases. When the system detects abnormal gas concentration, it can quickly send out an early warning signal for alarm, and guide the operators to evacuate or take other emergency measures through communication equipment, thereby improving the speed and efficiency of emergency response and reducing losses after accidents. At the same time, the system integrates cloud platform and big data technology, which can realize real-time monitoring of the Internet remotely to obtain on-site information in a timely manner, notify the leadership decision-making level in the shortest time, greatly shorten the decision-making chain, and thus improve management efficiency and response speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 It is a first schematic diagram of the structure of an intelligent safety monitoring system for a limited space provided by an embodiment of the present invention; Figure 2 is a front schematic diagram of a gas detection transmitter in an embodiment of the present invention; Figure 3 is a schematic diagram of the side installation of the gas detection transmitter in an embodiment of the present invention; Figure 4 is a second schematic diagram of the structure of an intelligent safety monitoring system for a limited space provided by an embodiment of the present invention; Figure 5 It is a first schematic diagram of the process of the intelligent safety monitoring method for a limited space provided by an embodiment of the present invention; Figure 6 This is the second schematic diagram of the process of the intelligent safety monitoring method for a limited space provided in an embodiment of the present invention.

[0018] Description of main component symbols: 100. Gas detection module; 110. Gas detection transmitter; 111. Housing; 112. Sensor; 113. Relay; 114. Zero adjustment potentiometer; 115. Control unit; 116. Wiring port; 117. Fixing component; 118. Fixing screw; 119. Expansion bolt; 200. Alarm control module; 300. Monitoring management module; 310. Camera unit; 320. Display unit; 400. Communication module; 410. First communication unit; 420. Second communication unit; 500. Background management module. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be further clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. It should be noted that the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0020] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in this specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0022] During the operation in confined spaces of municipal engineering projects such as culverts, the dangerous and harmful factors in the workplace should be regularly tested or continuously monitored. At present, the common practice at production sites is to use a gas detector to detect the content of toxic, harmful, flammable and explosive gases in the confined space before entering the confined space for operation. The commonly used gas detectors in engineering projects have a single function and can often only detect a certain type or category of gas, and cannot comprehensively monitor a variety of potential dangerous gases in the working environment. Secondly, the gas detectors carried by workers have poor detection effects and cannot achieve real-time monitoring of the entire operation process. In the event of emergencies such as gas leaks, alarms cannot be issued in time, and internal conditions cannot be known in time, thereby delaying the opportunity for emergency response. Therefore, there is currently a lack of dynamic monitoring of the working environment and the status of operators in confined spaces under complex conditions.

[0023] Example 1 The embodiment of the present invention provides an intelligent safety monitoring system for confined spaces, which effectively solves the current problem of lack of dynamic monitoring of the working environment and the status of operators in confined spaces under complex conditions. In the embodiment of the present invention, confined spaces include but are not limited to closed or semi-enclosed areas such as basements, underground mines, underground pipelines, and highway culverts that need to monitor toxic and harmful gases. Figure 1 is a first schematic diagram of the structure of an intelligent safety monitoring system for a limited space provided by an embodiment of the present invention, such as Figure 1 As shown, the safety monitoring system includes a gas detection module 100, an alarm control module 200 and a monitoring management module 300, wherein: The gas detection module 100 includes a gas detection transmitter 110, which is used to detect the gas concentration of the gas inside the confined space, including but not limited to H2S, CO, NH3, CH4, CO2 and O2. Multiple gas detection transmitters 110 can be set in high-risk areas such as the interior and exit of the confined space, so as to monitor the gas concentration at different locations, cover a wider area, reduce blind spots, more accurately reflect the gas concentration in the confined space, and ensure the overall reliability of the safety monitoring system.

[0024] Figure 2 is a front view schematic diagram of a gas detection transmitter according to an embodiment of the present invention. Figure 2As shown, the gas detection transmitter 110 includes a housing 111 , a sensor 112 , a relay 113 , a zero adjustment potentiometer 114 , a control unit 115 , a wiring port 116 and a fixing component 117 .

[0025] In the embodiment of the present invention, the shell 111 adopts a die-cast aluminum shell with a flameproof structure design, which has the characteristics of high strength, corrosion resistance and light weight, and can ensure that it maintains integrity in an explosive environment and prevents the spread of explosion flames and explosion products.

[0026] The sensor 112 is disposed at the lower portion of the housing 111 to ensure that the sensor 112 is in optimal contact with the gas. The sensor 112 is used to detect the gas concentration inside the limited space. In an embodiment of the present invention, the sensor 112 is an electrochemical sensor, which is used to react with the gas to be measured inside the limited space and generate an electrical signal proportional to the gas concentration.

[0027] Optionally, the electrolytic cell of the electrochemical sensor is separated from the external environment by a thin film, and three electrodes are arranged in the electrolytic cell, namely, a working electrode, a counter electrode and a reference electrode. A certain polarization voltage is applied to the working electrode, the counter electrode and the reference electrode, and the measured gas penetrates into the electrolytic cell through the thin film and contacts the working electrode. On the working electrode, the measured gas undergoes an oxidation-reduction reaction, which is catalyzed by the electrode material designed for the measured gas. Due to the occurrence of the oxidation-reduction reaction, the electrochemical sensor generates a corresponding current, and the magnitude of this current is proportional to the concentration of the measured gas. After diffusion sampling, the current signal output by the electrochemical sensor is converted into a voltage signal for amplification, and the amplified voltage signal is converted into a current signal output through a voltage / current conversion circuit. The embodiment of the present invention adopts an electrochemical sensor, which uses the principle of controlled potential electrolysis, has the characteristics of high sensitivity, rapid response, long life and polarization time period, and can continuously monitor the concentration of CO, CO2, H2S, NH3, CH4 and O2 in the control environment, and outputs the corresponding current signal for timely alarm.

[0028] The relay 113, the zeroing potentiometer 114 and the control unit 115 are arranged inside the housing. The control unit 115 is connected to the sensor 112 and is used to receive the gas concentration and determine whether the gas concentration is greater than a set threshold. The control unit 115 includes but is not limited to control components such as a control chip, a microprocessor and a single-chip microcomputer. The gas detection transmitter 110 is provided with a normally open passive relay interface. When the gas concentration is higher than the set value, the relay 113 is energized.

[0029] The zeroing potentiometer 114 is used to calibrate and adjust the zero output of the sensor 112. Since the sensor 112 may be affected by environmental factors such as temperature and humidity during use, its zero output may be offset. By adjusting the zeroing potentiometer 114, this offset can be corrected to ensure the measurement accuracy of the gas detection transmitter 110. Optionally, the gas detection transmitter 110 is first placed in pure air to ensure that the gas detection transmitter 110 will not be disturbed by other gases when zeroing, so that an accurate zeroing result can be obtained. Then the gas detection transmitter 110 is connected to the digital display control instrument and powered on. In order to ensure that the gas detection transmitter 110 and the digital display control instrument have been fully preheated and stabilized, and to avoid fluctuations in readings caused by temperature changes or other factors, it is necessary to start zeroing after stabilization for half an hour. Finally, adjust the zeroing potentiometer 114 to change the display value on the digital display control instrument so that its display value is "0", that is, the output signal of the gas detection transmitter 110 in pure air is zero. In this way, when the gas detection transmitter 110 is used in an actual detection environment, its displayed value can accurately reflect the concentration of the gas in the environment.

[0030] In the embodiment of the present invention, the gas detection transmitter 110 further has a wiring port 116 and a fixing component 117 . Figure 3 : is a schematic diagram of the side installation of the gas detection transmitter in the embodiment of the present invention. Figure 3 As shown, the fixing component 117 is arranged around the housing 111 of the gas detection transmitter 110. The gas detection transmitter 110 is installed on the wall inside the limited space by using an expansion bolt 119 in cooperation with the fixing component 117, and then fixed from the side by a fixing screw 118. The wiring port 116 serves as the lead-in and lead-out port of the power supply line and the signal line, and as an interface for the gas detection transmitter 110 to connect the power supply and other devices.

[0031] The alarm control module 200 is connected to the gas detection module 100 through a communication cable. The alarm control module 200 is arranged outside the limited space, and can be arranged in a command room, a management room, a monitoring room, etc. The alarm control module 200 is used to alarm when an abnormal gas concentration is detected to remind the staff. In an embodiment of the present invention, the alarm control module 200 at least includes an acoustic and visual alarm unit, which is communicatively connected to the relay 113, and the acoustic and visual alarm unit is used to receive a current signal for acoustic and visual warning. When the electrochemical sensor of the gas detection transmitter 110 detects that the gas concentration inside the limited space is higher than the set threshold, the relay 113 is closed, and the current signal generated by the electrochemical sensor is transmitted to the alarm control module 200 through the relay 113, and an acoustic and visual alarm is simultaneously issued to the staff outside the limited space through the acoustic and visual alarm unit.

[0032] Optionally, the alarm control module 200 may further include a data transmission unit, which is connected to the gas detection module 100 via a data transmission line and is used to upload abnormal data to the construction management cloud platform.

[0033] The monitoring management module 300 includes at least a camera unit 310 and a display unit 320. The camera unit 310 is arranged inside the limited space and is used to obtain real-time images inside the limited space. The camera unit 310 can use different types of cameras such as fixed cameras, pan-tilt cameras, infrared cameras, and high-definition cameras, which can be selected according to actual conditions. In the embodiment of the present invention, the camera unit 310 uses an infrared ball camera to obtain real-time images. The infrared ball camera is a monitoring camera with infrared night vision function and spherical pan-tilt design. It combines infrared camera technology and the flexibility of the spherical pan-tilt, and can provide all-round monitoring coverage under various light conditions.

[0034] The camera unit 310 is connected to the display unit 320 through network devices such as bridges and switches. The display unit is used to receive real-time images for display. Workers outside the confined space can understand the status of construction workers inside the confined space in real time through the display unit 320. The display unit 320 includes but is not limited to electronic devices such as computer equipment, mobile phones, tablets and network displays.

[0035] As a further implementation of the embodiment of the present invention, Figure 4 is a second schematic diagram of the structure of the intelligent safety monitoring system for a limited space provided by an embodiment of the present invention, such as Figure 4 As shown, the security monitoring system further includes a communication module 400, which includes a first communication unit 410 and a second communication unit 420, wherein the first communication unit 410 is arranged outside the limited space, and the second communication unit 420 is arranged inside the limited space. In the embodiment of the present invention, the first communication unit 410 adopts an IP microphone and is arranged in a command room or a monitoring room outside the limited space, and the second communication unit 420 adopts an IP speaker and can be arranged at multiple locations inside the limited space, and the IP microphone is communicatively connected with the IP speaker.

[0036] In an embodiment of the present invention, when the sound and light alarm unit of the alarm control module 200 issues a sound and light warning to remind the staff, the staff outside the confined space transmits the sound to the IP speaker inside the confined space through the IP microphone, notifying the construction workers inside the confined space to evacuate as soon as possible. The IP speaker and the IP microphone are both network audio devices based on the Internet Protocol. The combination of the two can build a powerful network audio system to realize functions such as remote audio transmission, control and intercom. The IP speaker transmits audio data through the IP network and can be deployed in a distributed network environment. It usually has greater flexibility and scalability, and can be customized and expanded according to needs to support various complex practical application scenarios. The IP microphone supports two-way communication, that is, it can receive and send audio signals to realize remote intercom or calls. It has a touch screen or other control interface, which can remotely control shouting or intercom.

[0037] When the alarm control module 200 is not activated, the staff outside the confined space can monitor the workers in real time through the monitoring management module 300 to see whether they are working in a standardized manner and wearing various protective devices safely. When the alarm control module 200 is activated, the staff transmits the information to the IP speaker inside the confined space through the IP microphone to notify the construction workers in the confined space to evacuate as soon as possible. If a safety accident occurs inside the confined space, the status of the personnel can be grasped in real time through the monitoring screen of the monitoring management module 300, and the on-site construction workers can be commanded to evacuate quickly or arrange effective measures through the IP microphone to avoid blind rescue, thereby efficiently commanding emergency rescue and ensuring the safety of the workers.

[0038] Optionally, the security monitoring system also includes a background management module 500, which may include a cloud platform and / or a big data platform, and integrates relevant data into the cloud platform for data storage, query, analysis, mining and processing. The background management module 500 is respectively connected to the alarm control module 200 and the monitoring management module 300 for communication, and the background management module 500 is used to receive abnormal data transmitted by the alarm control module 200, and the management unit of the cloud platform sends an alarm message to the relevant responsible personnel as soon as possible. At the same time, the background management module 500 can also be used to receive real-time monitoring data of the monitoring management module 300 to facilitate remote management. In an embodiment of the present invention, the display unit 320 is connected to the background management module 500 by means of RS232 communication interface, RS485 communication interface and wireless transmission, so that the Internet can realize real-time monitoring of project conditions in different places.

[0039] The backend management module 500 can realize comprehensive analysis and mining of project data, providing scientific basis and decision support for project management. This not only improves the efficiency and accuracy of project management, but also reduces the travel cost and time cost of managers. At the same time, through the data analysis and mining functions of the big data platform, potential problems and risks in project management can also be discovered, providing strong guarantee for the smooth progress of the project.

[0040] The intelligent safety monitoring system for confined spaces provided by the embodiment of the present invention can monitor the concentration of toxic and harmful gases in the confined space in real time through a gas detection transmitter. The gas detection transmitter adopts an electrochemical sensor and utilizes the principle of controlled potential electrolysis to accurately and stably measure the concentration of the measured gas, and output a corresponding current signal for real-time monitoring, which has the advantages of high sensitivity, rapid response, long service life and short polarization time. When the gas concentration exceeds the standard, the gas detection transmitter sends out an early warning signal to make the early warning control module outside the confined space alarm. The command personnel can understand the status of the construction personnel in real time through the monitoring and management module, and then command the on-site construction personnel to evacuate quickly or arrange effective measures through the communication module. At the same time, the monitoring and management module is connected to the background management module through the communication interface and integrated into the big data platform, so that the real-time monitoring of the project situation can be realized remotely through the Internet.

[0041] Example 2 Based on the same technical concept, an embodiment of the present invention provides an intelligent safety monitoring method for a limited space. The safety monitoring method is applied to the intelligent safety monitoring system for a limited space in the above embodiment 1. Figure 5 is a first schematic diagram of the process of the intelligent safety monitoring method for a limited space provided by an embodiment of the present invention, such as Figure 5 As shown, the safety monitoring method includes the following steps: S100: Perform gas detection inside the limited space through a gas detection module to obtain the gas concentration inside the limited space.

[0042] In the embodiment of the present invention, the gas detection module adopts a high-precision electrochemical sensor, which can quickly and accurately detect the gas concentration in a limited space.

[0043] S200: If the gas concentration exceeds a set threshold, the gas detection module sends a current signal to the alarm control module for sound and light alarm.

[0044] In an embodiment of the present invention, the gas detection module continuously monitors the gas concentration inside the confined space. Once it is found that the gas concentration exceeds the set threshold or is abnormal, it immediately sends a current signal to trigger the alarm control module outside the confined space to sound and light alarm, reminding the staff to take emergency measures quickly.

[0045] S300, the camera unit of the monitoring management module obtains the real-time image inside the limited space, and transmits the real-time image to the display unit for image display.

[0046] In an embodiment of the present invention, the camera unit of the monitoring and management module captures real-time images inside the confined space, transmits these images to the display unit for display, and views the image information inside the confined space in real time through the display unit so as to promptly detect abnormal situations and take countermeasures, thereby realizing effective monitoring and management of the confined space.

[0047] As a further implementation of the embodiment of the present invention, Figure 6 2 is a second schematic diagram of the process of the intelligent safety monitoring method for a limited space provided by an embodiment of the present invention, such as Figure 6 As shown, the safety monitoring method also includes the following steps: S400: If the alarm control module issues an audible and visual alarm, a voice warning is issued through the communication module.

[0048] In the embodiment of the present invention, when the sound and light alarm unit of the alarm control module sends out a sound and light warning to remind the staff, the staff outside the confined space notifies the construction staff inside the confined space to evacuate as soon as possible through the communication module.

[0049] S500, the monitoring management module transmits the real-time image to the background management module for remote management.

[0050] In an embodiment of the present invention, the monitoring management module transmits real-time images to the background management module. By integrating relevant data into the big data platform, real-time remote monitoring of project status over the Internet can be achieved, thereby improving the flexibility and efficiency of the monitoring system and providing management personnel with a more convenient and efficient monitoring method.

[0051] It can be understood that the implementation method of the intelligent safety monitoring system for a limited space in the above-mentioned embodiment 1 is also applicable to this embodiment and can achieve the same technical effect, so it will not be repeated here.

[0052] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0053] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. 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. An intelligent safety monitoring system for a limited space, characterized in that: The safety monitoring system includes a gas detection module, an alarm control module and a monitoring management module, wherein: The gas detection module includes a gas detection transmitter, which is arranged inside the limited space and is used to detect the gas concentration inside the limited space; The alarm control module is in communication connection with the gas detection module, the alarm control module is arranged outside the limited space, and the alarm control module is used to alarm to remind the staff when the abnormal gas concentration is detected; The monitoring and management module includes at least a camera unit and a display unit. The camera unit is arranged inside the limited space, and is used to obtain a real-time image inside the limited space. The camera unit is communicatively connected to the display unit, and the display unit is used to receive the real-time image for display.

2. The intelligent safety monitoring system for limited space according to claim 1 is characterized in that: The gas detection transmitter at least includes a housing, a sensor, a relay, a zero adjustment potentiometer and a control unit, wherein: The sensor is arranged at the lower part of the housing, and the sensor is used to detect the gas concentration inside the limited space; The relay, the zero adjustment potentiometer and the control unit are arranged inside the housing, and the control unit is connected to the sensor to receive the gas concentration and determine whether the gas concentration is greater than a set threshold; The relay is connected to the control unit. If the control unit determines that the gas concentration is greater than the set threshold, the relay is controlled to close and a current signal is sent to the alarm control module. The zero adjustment potentiometer is connected to the sensor, and the zero adjustment potentiometer is used to adjust the zero point output of the sensor.

3. The intelligent safety monitoring system for limited space according to claim 2 is characterized in that: The sensor is an electrochemical sensor, which is used to react with the gas to be measured inside the limited space and generate an electrical signal proportional to the concentration of the gas.

4. The intelligent safety monitoring system for limited space according to claim 2 is characterized in that: The alarm control module at least includes an audible and visual alarm unit, which is communicatively connected to the relay and is used to receive the current signal for audible and visual warning.

5. The intelligent safety monitoring system for a limited space according to any one of claims 1 to 4, characterized in that: The safety monitoring system further includes a communication module, wherein the communication module includes a first communication unit and a second communication unit, wherein the first communication unit is arranged outside the limited space, and the second communication unit is arranged inside the limited space.

6. The intelligent safety monitoring system for limited space according to claim 5, characterized in that: The first communication unit is an IP microphone, the second communication unit is an IP speaker, and the IP microphone is communicatively connected to the IP speaker.

7. The intelligent safety monitoring system for a limited space according to any one of claims 1 to 4, characterized in that: The safety monitoring system also includes a background management module, which is respectively connected to the alarm control module and the monitoring management module for communication, and is used to receive data transmitted by the alarm control module and the monitoring management module for remote management.

8. An intelligent safety monitoring method for a limited space, characterized in that: The safety monitoring method is applied to the intelligent safety monitoring system for a limited space according to any one of claims 1 to 7, and the safety monitoring method comprises: Performing gas detection inside the limited space through a gas detection module to obtain the gas concentration inside the limited space; If the gas concentration exceeds the set threshold, the gas detection module sends a current signal to the alarm control module for sound and light alarm; The camera unit of the monitoring management module obtains the real-time picture inside the limited space, and transmits the real-time picture to the display unit for picture display.

9. The intelligent safety monitoring method for a limited space according to claim 8, characterized in that: The safety monitoring method further comprises: If the alarm control module performs an audible and visual alarm, a voice warning is performed through the communication module.

10. The intelligent safety monitoring method for a limited space according to claim 8, characterized in that: The safety monitoring method further comprises: The monitoring management module transmits the real-time images to the background management module for remote management.

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