Video surveillance system fault detection method and device

Abstract

The present invention discloses a video surveillance system fault detection device, comprising a plurality of operation and maintenance monitoring boxes, which divide the cameras in the video surveillance system into a plurality of zones. The cameras in the plurality of zones correspond one-to-one to the plurality of operation and maintenance monitoring boxes. Each operation and maintenance monitoring box comprises: a box body, in which an automatic fire extinguishing module is disposed; a first temperature sensor for detecting temperature data in the box body; a smoke sensor for detecting smoke data in the box body; and a control module connected to the cameras, the first temperature sensor, the smoke sensor, and the automatic fire extinguishing module in the corresponding zone, for receiving and determining whether the smoke data exceeds a smoke threshold. If so, the automatic fire extinguishing module is activated. If not, the automatic fire extinguishing module is activated. The present invention has the beneficial effect of fault detection for a wide range of video surveillance equipment, can be arranged in layers, and can automatically extinguish the fire in a timely manner when a fire occurs.

Description

Technical Field

[0001] The present invention relates to the technical field of video surveillance fault detection, and more particularly to a method and apparatus for video surveillance system fault detection. Background Art

[0002] Over the past decade, the security industry has consistently set new records in output value. While this has significantly enhanced urban social security, the increasing number of surveillance cameras and the extended monitoring hours have created a series of unprecedented challenges for the operation and maintenance of surveillance systems. Currently, patrolling the vast and rapidly growing number of video surveillance points with limited manpower is impractical.

[0003] The application number is 201911145184.X, and its name is an IoT operation and maintenance monitoring box for multi-channel video surveillance integration. It discloses an operation and maintenance monitoring box that integrates each sensor, lightning protector, automatic reclosing module, data acquisition and remote control module, etc. By arranging the operation and maintenance anti-skid at the front end of the video surveillance system, it plays multiple fault monitoring and operation and maintenance protection functions such as data transmission, network exchange, power supply, lightning protection, and power protection; the application number is 202110266266.1. Its name is a substation video surveillance system and its protection box. It discloses a method of real-time monitoring of the overvoltage data of various lines such as the power line, video signal line and control signal line of the camera, and uploading these overvoltage data to the control center in time for analyzing whether the substation video surveillance system is in a normal state, providing data support for the cause of the fault, and timely predicting system failures to achieve the purpose of active operation and maintenance.

[0004] Although the above solution has achieved the operation and maintenance monitoring of video surveillance equipment to a certain extent, it has the problem that it cannot perform fault detection of large-scale video surveillance equipment in a hierarchical manner, resulting in cumbersome monitoring, and cannot automatically extinguish the fire in time when a fire occurs. Summary of the Invention

[0005] An object of the present invention is to solve at least the above problems and to provide at least the advantages which will be described hereinafter.

[0006] Another object of the present invention is to provide a video surveillance system fault detection device that can be set up in layers for fault detection of large-scale video surveillance equipment, and can automatically extinguish the fire in a timely manner when a fire occurs.

[0007] To achieve these objectives and other advantages of the present invention, a video surveillance system fault detection device is provided, comprising a plurality of operation and maintenance monitoring boxes, which divide cameras within the video surveillance system into a plurality of zones. The cameras in the plurality of zones correspond one-to-one to the plurality of operation and maintenance monitoring boxes, each of which comprises:

[0008] A box body, in which an automatic fire extinguishing module is arranged;

[0009] A first temperature sensor is provided in the box body and is used to detect temperature data in the box body;

[0010] A smoke sensor is provided in the box and is used to detect smoke data in the box;

[0011] A control module is provided in the box and is connected to the camera, the first temperature sensor, the smoke sensor, and the automatic fire extinguishing module in the corresponding area. The control module is configured to receive and determine whether the smoke data is greater than the smoke threshold. If so, the automatic fire extinguishing module is activated. If not, the control module receives and determines whether the temperature data is greater than the temperature threshold. If so, the automatic fire extinguishing module is activated.

[0012] Among them, each control module is connected to the video surveillance center and is used to transmit the collected video data, temperature data, and smoke data to the video surveillance center.

[0013] Preferably, the video surveillance system fault detection device further includes a second temperature sensor, which is arranged on the outside of the box and connected to the control module, and is used to detect the temperature data of the environment. The control module determines whether the temperature data is greater than the temperature threshold by specifically obtaining the difference in temperature data between the first temperature sensor and the second temperature sensor, and determining whether the temperature data difference is greater than the temperature threshold.

[0014] Preferably, historical temperature data of the first temperature sensor is collected and divided into multiple parts according to a certain time interval, and the maximum temperature of each part is obtained as the temperature threshold of the part.

[0015] Preferably, historical temperature data of the first temperature sensor and the second temperature sensor are collected to form a plurality of temperature data pairs, all historical temperature data of the second temperature sensor are divided into a plurality of temperature intervals, and the difference between the temperature data of the first temperature sensor and the second temperature sensor in each temperature data pair within each temperature interval is calculated;

[0016] A temperature interval of the temperature data of the second temperature sensor at the current time is determined, and the maximum difference in the temperature interval is taken as a temperature threshold corresponding to the temperature interval.

[0017] Preferably, the box includes a first box and a second box that are adjacent to each other, and a third box that is located on top of the first box and the second box, and the first temperature sensor, the smoke sensor, and the control module are all located in the first box;

[0018] The automatic fire extinguishing module is a carbon dioxide fire extinguisher, which is arranged in the second box. The injection pipe of the carbon dioxide fire extinguisher passes through the top of the second box, the third box, and the top of the first box in sequence to communicate with the first box. The gripping part of the bottle valve of the carbon dioxide fire extinguisher includes an upper pressing part and a lower supporting part. A support rod is provided between the upper pressing part and the lower supporting part. The upper pressing part is connected to the gravity block through a traction rope.

[0019] The device further comprises: a first electromagnet connected to the control module and disposed at the top of the second housing, wherein the control module controls the power on and off of the first electromagnet. When the smoke data is not greater than the smoke threshold and the temperature data is not greater than the temperature threshold, the first electromagnet is energized, and the gravity block is magnetically attracted to the first electromagnet.

[0020] When the smoke data is greater than the smoke threshold and the temperature data is greater than the temperature threshold, the first electromagnet is controlled to be powered off, the gravity block falls, driving the upper pressing part to move downward to break the support rod, and continue to move downward to open the bottle head valve to spray fire extinguishing towards the first box.

[0021] Preferably, the video surveillance system fault detection device further comprises: a door magnetic sensor, a lightning protection module, and an automatic reclosing module disposed in the first box and connected to the control module, wherein:

[0022] The door magnetic induction module is used to detect the opening and closing status of the doors of the first and second cabinets. When the control module detects that the cabinet door is open, it generates door opening data and transmits it to the video monitoring center;

[0023] The lightning protector has AC 220V lightning protection and network lightning protection functions;

[0024] The automatic reclosing module is used to realize overcurrent and short circuit protection, undervoltage / overvoltage protection, leakage protection, fault memory, pre-closing detection, and automatic reclosing intelligent control.

[0025] Preferably, a backup power supply is provided in the first box and connected to the control module. The control module controls the on and off of the backup power supply. The power management module controls when the mains power is on, and uses the mains power to provide power for the camera and various components in the box. When the mains power is off, the backup power supply is used to power the first electromagnet.

[0026] Preferably, a plurality of ventilation holes are formed through one side of the first box away from the second box, the plurality of ventilation holes are spaced apart vertically, each ventilation hole is rectangular, and an exhaust hole is formed at the bottom of the first box;

[0027] A cover plate is provided at the top of the box body, and a rectangular accommodating cavity is provided below the cover plate on a side away from the second box body. A second electromagnet is provided at the top of the accommodating cavity, and a gravity plate is provided below the second electromagnet in the accommodating cavity. A pull rope is provided at the bottom end. The pull rope passes through the accommodating cavity and then passes through the side wall of the first box body. A plurality of baffle plates are suspended at intervals in the vertical direction at the exit end, and the plurality of baffle plates correspond to the plurality of ventilation holes one by one.

[0028] The second electromagnet is connected to a control module, and the control module controls the power on and off of the second electromagnet. When the smoke data is not greater than the smoke threshold and the temperature data is not greater than the temperature threshold, the second electromagnet is energized, the gravity block is magnetically attracted to the second electromagnet, and the multiple sealing plates are located in a one-to-one correspondence with the corresponding ventilation group holes.

[0029] When the smoke data is greater than the smoke threshold and the temperature data is greater than the temperature threshold, the control module controls the second electromagnet to be powered off for 1-2 seconds, and then controls the first electromagnet to be powered off. When the second electromagnet is powered off, the second electromagnet falls to the lowest end, and multiple sealing plates are synchronized to block the corresponding ventilation group holes.

[0030] Preferably, the falling height of the gravity block is greater than the falling height of the gravity plate.

[0031] The invention discloses a method for performing fault detection by a fault detection device of a video monitoring system.

[0032] The present invention has at least the following beneficial effects:

[0033] The operation and maintenance protection box adopts an integrated design with a compact structure. It integrates lightning protection, automatic reclosing, and dynamic environment monitoring functions. It cooperates with the video surveillance center to realize camera operation status monitoring and control, and intelligent fault diagnosis.

[0034] For fault detection of large-scale video surveillance equipment, it can be set up in layers to achieve all-round monitoring while reducing cumbersome settings. Due to the integrated setting of the operation and maintenance protection box, in conjunction with the automatic fire extinguishing module, it can automatically extinguish the fire in the first time when a fire occurs. Specifically: through the setting of the mains power and the backup power supply, the stability of the automatic fire extinguishing module is guaranteed to avoid accidental fire extinguishing caused by mains power outages. Furthermore, the automatic fire extinguishing module is controlled by the iron block cooperating with the first electromagnet to enable automatic fire extinguishing even in the case of a complete power outage; further, while meeting daily ventilation and heat dissipation needs, in the event of a fire, the ventilation group holes are covered by the sealing baffle to achieve a top-to-bottom passage in the first box body to avoid excessive carbon dioxide escaping through the ventilation group holes and reducing the fire extinguishing effect.

[0035] Other advantages, objectives and features of the present invention will be reflected in part from the following description and will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a block diagram of a video surveillance system fault detection device according to one of the technical solutions of the present invention;

[0037] Figure 2 A schematic structural diagram of a video surveillance system according to one of the technical solutions of the present invention;

[0038] Figure 3 This is a structural diagram of the box according to one of the technical solutions of the present invention;

[0039] Figure 4 This is a structural diagram of a box body combined with an automatic fire extinguishing module according to one of the technical solutions of the present invention.

[0040] The figures are marked as follows: operation and maintenance monitoring box 1; automatic fire extinguishing module 2; spray pipe 3; grip part 4; upper pressing part 5; lower supporting part 6; support rod 7; traction rope 8; first box body 9; second box body 10; third box body 11; ventilation group hole 12; exhaust hole 13; cover plate 14; accommodating chamber 15; second electromagnet 16; gravity plate 17; pull rope 18; sealing plate 19; diffusion chamber 20. DETAILED DESCRIPTION

[0041] The present invention is further described in detail below with reference to the embodiments so that those skilled in the art can implement the invention with reference to the description.

[0042] like Figure 1-2 As shown, the present invention provides a video surveillance system fault detection device, including multiple operation and maintenance monitoring boxes 1, which divide the cameras in the video surveillance system into multiple areas. The cameras in the multiple areas correspond to the multiple operation and maintenance monitoring boxes 1 one by one. Each operation and maintenance monitoring box 1 includes:

[0043] A box body, in which an automatic fire extinguishing module 2 is arranged;

[0044] A first temperature sensor is provided in the box body and is used to detect temperature data in the box body;

[0045] A smoke sensor is provided in the box and is used to detect smoke data in the box;

[0046] A control module is provided in the box. The control module is connected to the camera, the first temperature sensor, the smoke sensor, and the automatic fire extinguishing module 2 in the corresponding area, and is used to receive and determine whether the smoke data is greater than the smoke threshold. If so, the automatic fire extinguishing module 2 is activated. If not, the control module receives and determines whether the temperature data is greater than the temperature threshold. If so, the automatic fire extinguishing module 2 is activated. The temperature threshold can be set according to actual conditions. Specifically, the historical temperature data (valid data) of the first temperature sensor is collected and divided into multiple parts according to a certain time interval. The maximum temperature of each part is obtained as the temperature threshold of the part. That is, when the temperature data of the first temperature sensor is received, the collection time is received, and the part to which the current collection time belongs is determined, and the corresponding temperature threshold is determined. Furthermore, the certain time interval can be a week, a month, a quarter, etc., which is determined according to actual conditions.

[0047] Among them, each control module is connected to the video monitoring center through a network communication module, which is used to transmit the collected video data, temperature data, and smoke data to the video monitoring center.

[0048] In the above technical solution, each operation and maintenance monitoring box 1 is used to monitor and detect the cameras in the corresponding area. Preferably, since the operation and maintenance monitoring box 1 is mostly used in an open-air environment, it is preferably designed to have good waterproof, dustproof, heat dissipation, anti-theft, cold-proof and anti-exposure functions. Specifically, the material of the box is set to metal, and the protection level is IP45 to enhance the service life of the box. The monitoring area of the video surveillance system is determined according to actual conditions, and it may specifically involve highways, community monitoring, electric police checkpoints and other areas; during use, the video surveillance system includes multiple cameras arranged at the front end for collecting monitoring information, and a video surveillance center arranged at the back end for obtaining and processing monitoring information. The cameras in the monitoring area of the video surveillance system are divided into multiple areas, and the cameras in multiple areas are connected to multiple operation and maintenance monitoring boxes 1. One by one, the first temperature sensor detects the temperature data in the box according to the predetermined detection time interval, and the smoke sensor detects the smoke data in the box according to the predetermined detection time interval. The control module receives and determines whether the smoke data is greater than the smoke threshold. If so, the automatic fire extinguishing module 2 is started. If not, it receives and determines whether the temperature data is greater than the temperature threshold. If so, the automatic fire extinguishing module 2 is started. Furthermore, each control module is connected to the video surveillance center to transmit the collected video data, temperature data, and smoke data to the video surveillance center. With this technical solution, fault detection of large-scale video surveillance equipment can be layered, achieving all-round monitoring while reducing cumbersome settings. On the basis of the integrated setting of the operation and maintenance protection box, in conjunction with the automatic fire extinguishing module 2, it can automatically extinguish the fire in the first time when a fire occurs.

[0049] In another technical solution, the video surveillance system fault detection device further includes a second temperature sensor, which is provided outside the box and connected to the control module, and is used to detect the temperature data of the environment. The control module determines whether the temperature data is greater than the temperature threshold by specifically obtaining the difference between the temperature data of the first temperature sensor and the second temperature sensor, and determining whether the temperature data difference is greater than the temperature threshold. The setting of the temperature threshold is determined according to the specific situation. One solution may be: collecting historical temperature data of the first temperature sensor and the second temperature sensor to form a plurality of temperature data pairs, dividing all the historical temperature data of the second temperature sensor into a plurality of temperature intervals, obtaining the difference between the temperature data of the first temperature sensor and the second temperature sensor in each temperature data pair within each temperature interval, and determining the maximum difference in each temperature interval;

[0050] Determine the temperature interval of the temperature data collected by the second temperature sensor at the current time, and take the maximum difference in this temperature interval as the temperature threshold corresponding to this temperature interval. With this solution, the second temperature sensor is set to measure the external temperature to determine the temperature difference between the inside and outside of the box. Because the ambient temperature serves as a reference, the judgment accuracy is improved.

[0051] In another technical solution, Figure 3-4 As shown, the box includes a first box 9 and a second box 10 arranged adjacent to each other and a third box 11 arranged on the top of the first box 9 and the second box 10. The first temperature sensor, the smoke sensor, and the control module are all arranged in the first box 9;

[0052] The automatic fire extinguishing module 2 is a carbon dioxide fire extinguisher, which is arranged in the second box body 10. The injection pipe 3 of the carbon dioxide fire extinguisher passes through the top of the second box body 10, the third box body 11, and the top of the first box body 9 in sequence to communicate with the first box body 9. The gripping part 4 of the bottle head valve of the carbon dioxide fire extinguisher includes an upper pressing part 5 and a lower supporting part 6. A support rod 7 is provided between the upper pressing part 5 and the lower supporting part 6. The upper pressing part 5 is connected to the gravity block by a traction rope 8. The working principle of the carbon dioxide fire extinguisher is similar to that of a portable carbon dioxide fire extinguisher, but it does not have a lead seal and a pull ring. Instead, it is replaced by a support rod 7. Specifically, the opposite side walls of the upper pressing part 5 and the lower supporting part 6 are recessed with grooves. The two ends of the support rod 7 are supported in a pair of grooves to support a certain distance between the upper pressing part 5 and the lower supporting part 6. The support rod 7 can be broken under the action of a certain external force, and the certain external force is less than the gravity of the gravity block.

[0053] The device further comprises: a first electromagnet connected to the control module and disposed at the top of the second housing 10. The control module controls the power on and off of the first electromagnet. When the smoke data is not greater than the smoke threshold and the temperature data is not greater than the temperature threshold, the first electromagnet is energized and the gravity block is magnetically attracted to the first electromagnet.

[0054] When the smoke data exceeds the smoke threshold and the temperature data exceeds the temperature threshold, the first electromagnet is de-energized, and the weight block falls, driving the upper pressing portion 5 downward to break the support rod 7, and continuing to move downward to open the bottle head valve, thereby spraying fire extinguishing liquid toward the first box 9. Preferably, the second temperature sensor is located on the side of the second box 10 away from the first box 9 to improve the accuracy of ambient temperature detection. With this solution, the automatic fire extinguishing module 2 is controlled by the weight block in conjunction with the first electromagnet, so that automatic fire extinguishing can still be achieved even when the system is completely powered off.

[0055] Preferably, a diffusion chamber 20 is provided at the outlet end of the injection pipe 3 on the top of the first box body 9 , and the diffusion chamber 20 is connected to the first box body 9 and penetrates through a plurality of through holes to evenly spray the outlet end of the injection pipe 3 toward the first box body 9 .

[0056] In another technical solution, Figure 2 As shown, the video surveillance system fault detection device further includes: a door magnetic sensor, a lightning protection module (lightning protector), and an automatic reclosing module, which are arranged in the first box 9 and connected to the control module, wherein:

[0057] The door magnetic induction module is used to detect the open and closed status of the doors of the first box body 9 and the second box body 10. When the control module detects that the door is open, it generates door opening data and transmits it to the video surveillance center. Preferably, it also includes an authentication module. When the control module detects that the door is open, it authenticates the operator's authority through the authentication module.

[0058] The lightning protector has AC 220V lightning protection and network lightning protection functions;

[0059] The automatic reclosing module is used to realize overcurrent short circuit protection, undervoltage / overvoltage protection, leakage protection, fault memory, pre-closing detection, and automatic reclosing intelligent control. In the above technical solution, it has an automatic reclosing function, intelligently judges the main power supply and internal power supply failure, and can remotely power off and power on devices such as cameras. Preferably, the management platform of the automatic monitoring center adopts a B / S architecture and a distributed design, supports mobile phone APP, and supports multiple network connections such as Ethernet and 4G. With this solution, the operation and maintenance protection box adopts an integrated design with a compact structure, integrated lightning protection, automatic reclosing, and dynamic environment monitoring functions, and cooperates with the network management platform to realize equipment operation status monitoring and control, and intelligent fault diagnosis.

[0060] In another technical solution, a backup power supply is also included within the first housing 9 and connected to the control module. The control module controls the on / off switching of the backup power supply. The power management module controls the use of the mains power to power the camera and various components within the housing when the mains power is on, and the use of the backup power supply to power the first electromagnet when the mains power is off. With this solution, the mains power provides multiple power supplies, including AC220V, DC12V, and DC5V. By combining the mains power with the backup power supply, the automatic fire extinguishing module 2 maintains operational stability and prevents accidental fire extinguishing caused by mains power outages.

[0061] In another technical solution, a plurality of ventilation holes 12 are formed through one side of the first box body 9 away from the second box body 10. The plurality of ventilation holes 12 are spaced apart from each other, and each ventilation hole 12 is rectangular. An exhaust hole 13 is formed at the bottom of the first box body 9.

[0062] A cover plate 14 is provided at the top of the box body, and a rectangular accommodating chamber 15 is provided below the cover plate 14 on the side away from the second box body 10. A second electromagnet 16 is provided at the top of the accommodating chamber 15, and a gravity plate 17 is provided below the second electromagnet in the accommodating chamber 15. A pull rope 18 is provided at the bottom end. The pull rope 18 passes through the accommodating chamber 15 and then passes through the side wall of the first box body 9. A plurality of baffles 19 are suspended at intervals in the vertical direction at the exit end. The plurality of baffles 19 correspond one-to-one to the plurality of ventilation holes 12.

[0063] The second electromagnet 16 is connected to a control module, which controls the power on and off of the second electromagnet 16. When the smoke data is not greater than the smoke threshold and the temperature data is not greater than the temperature threshold, the second electromagnet 16 is energized, the gravity block is magnetically attracted to the second electromagnet 16, and the plurality of blocking plates 19 are located one by one on the sides of the corresponding ventilation holes 12;

[0064] When the smoke data exceeds the smoke threshold and the temperature data exceeds the temperature threshold, the control module controls the second electromagnet 16 to de-energize for 1-2 seconds, and then controls the first electromagnet to de-energize. When the second electromagnet 16 is de-energized, it drops to its lowest point, and multiple blocking plates 19 simultaneously block the corresponding ventilation holes 12. This solution not only meets daily ventilation and heat dissipation needs, but also, in the event of a fire, the blocking plates 19 cover the ventilation holes 12, creating a top-to-bottom flow within the first housing 9, preventing excessive carbon dioxide from escaping through the ventilation holes 12 and reducing fire extinguishing effectiveness.

[0065] In another technical solution, the falling height of the gravity block is greater than the falling height of the gravity plate 17. This solution is adopted to achieve blocking first and then extinguishing the fire in the case of a complete power outage, thereby improving the fire extinguishing effect.

[0066] Example 1

[0067] The method for performing fault detection using the video surveillance system fault detection device comprises the following steps:

[0068] The cameras in the video surveillance area are divided into multiple areas. The cameras in multiple areas are connected one by one to multiple operation and maintenance monitoring boxes 1. Data of the video surveillance system is collected through the operation and maintenance monitoring boxes 1. Specifically, lightning protection module data, door magnetic sensors, network status data, power status data, etc. can be collected. At the same time, fault analysis is performed based on the monitoring data, and remote control of the corresponding components is achieved based on the analysis results.

[0069] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the description and implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A video surveillance system fault detection device, characterized in that: It includes multiple operation and maintenance monitoring boxes, which divide the cameras in the video surveillance system into multiple areas. The cameras in multiple areas correspond to multiple operation and maintenance monitoring boxes one by one. Each operation and maintenance monitoring box includes: A box body, in which an automatic fire extinguishing module is arranged; A first temperature sensor is provided in the box body and is used to detect temperature data in the box body; A second temperature sensor is provided outside the box and is connected to the control module for detecting the temperature data of the environment; A smoke sensor is provided in the box and is used to detect smoke data in the box; A control module is disposed within the housing and is connected to the camera, the first temperature sensor, the smoke sensor, and the automatic fire extinguishing module in the corresponding area. The control module is configured to receive and determine whether smoke data is greater than a smoke threshold, and if so, activate the automatic fire extinguishing module. If not, the control module receives and determines whether temperature data is greater than a temperature threshold, and if so, activates the automatic fire extinguishing module. The control module determines whether the temperature data is greater than the temperature threshold by obtaining a difference between the temperature data of the first temperature sensor and the second temperature sensor, and determining whether the temperature data difference is greater than the temperature threshold. Among them, each control module is connected to the video monitoring center and is used to transmit the collected video data, temperature data, and smoke data to the video monitoring center; wherein, historical temperature data of the first temperature sensor and the second temperature sensor are collected to form a plurality of temperature data pairs, all historical temperature data of the second temperature sensor are divided into a plurality of temperature intervals, and the difference between the temperature data of the first temperature sensor and the second temperature sensor in each temperature data pair within each temperature interval is calculated; Determine a temperature interval of the temperature data of the second temperature sensor at the current time, and take the maximum difference in the temperature interval as the temperature threshold corresponding to the temperature interval; The box includes a first box and a second box that are adjacent to each other, and a third box that is located on top of the first box and the second box. The first temperature sensor, the smoke sensor, and the control module are all located in the first box. The automatic fire extinguishing module is a carbon dioxide fire extinguisher, which is arranged in the second box. The injection pipe of the carbon dioxide fire extinguisher passes through the top of the second box, the third box, and the top of the first box in sequence to communicate with the first box. The gripping part of the bottle valve of the carbon dioxide fire extinguisher includes an upper pressing part and a lower supporting part. A support rod is provided between the upper pressing part and the lower supporting part. The upper pressing part is connected to the gravity block through a traction rope. It also includes: a first electromagnet, which is connected to the control module and is arranged at the top of the second box body. The control module controls the power on and off of the first electromagnet. When the smoke data is not greater than the smoke threshold and the temperature data is not greater than the temperature threshold, the first electromagnet is energized and the gravity block is magnetically attracted to the first electromagnet; when the smoke data is greater than the smoke threshold and the temperature data is greater than the temperature threshold, the first electromagnet is controlled to be de-energized, and the gravity block falls, driving the upper pressing part to move downward to break the support rod, and continue to move downward to open the bottle head valve to spray fire extinguishing towards the first box body.

2. The video surveillance system fault detection device according to claim 1, wherein: Also includes: The door magnetic sensor, lightning protection module, and automatic reclosing module are arranged in the first box and connected to the control module, wherein: The door magnetic induction module is used to detect the opening and closing status of the doors of the first and second cabinets. When the control module detects that the cabinet door is open, it generates door opening data and transmits it to the video monitoring center; The lightning protector has AC 220V lightning protection and network lightning protection functions; The automatic reclosing module is used to realize overcurrent and short circuit protection, undervoltage / overvoltage protection, leakage protection, fault memory, pre-closing detection, and automatic reclosing intelligent control.

3. The video surveillance system fault detection device according to claim 1, wherein: A backup power supply is also provided in the first box and connected to the control module. The control module controls the on and off of the backup power supply. When the power management module controls the mains power to be turned on, the mains power is used to provide power for the camera and various components in the box. When the mains power is turned off, the backup power supply is used to power the first electromagnet.

4. The video surveillance system fault detection device according to claim 1, wherein: A plurality of ventilation holes are formed through one side of the first box body away from the second box body, the plurality of ventilation holes are spaced apart from each other, each ventilation hole is rectangular, and an exhaust hole is formed at the bottom of the first box body; A cover plate is provided at the top of the box body, and a rectangular accommodating cavity is provided below the cover plate on a side away from the second box body. A second electromagnet is provided at the top of the accommodating cavity, and a gravity plate is provided below the second electromagnet in the accommodating cavity. A pull rope is provided at the bottom end. The pull rope passes through the accommodating cavity and then passes through the side wall of the first box body. A plurality of baffle plates are suspended at intervals in the vertical direction at the exit end, and the plurality of baffle plates correspond to the plurality of ventilation holes one by one. The second electromagnet is connected to a control module, and the control module controls the power on and off of the second electromagnet. When the smoke data is not greater than the smoke threshold and the temperature data is not greater than the temperature threshold, the second electromagnet is energized, the gravity block is magnetically attracted to the second electromagnet, and the multiple sealing plates are located in a one-to-one correspondence with the corresponding ventilation group holes. When the smoke data is greater than the smoke threshold and the temperature data is greater than the temperature threshold, the control module controls the second electromagnet to be powered off for 1-2 seconds, and then controls the first electromagnet to be powered off. When the second electromagnet is powered off, the second electromagnet falls to the lowest end, and multiple sealing plates are synchronized to block the corresponding ventilation group holes.

5. The video surveillance system fault detection device according to claim 4, characterized in that: The falling height of the gravity block is greater than the falling height of the gravity plate.

6. A method for fault detection using the video surveillance system fault detection device according to any one of claims 1 to 5, characterized in that: The method includes the following steps: dividing the cameras in the video surveillance area into multiple areas, connecting the cameras in the multiple areas to multiple operation and maintenance monitoring boxes one by one, collecting data from the video surveillance system through the operation and maintenance monitoring boxes, performing fault analysis based on the collected data to obtain analysis results, and remotely controlling the corresponding components based on the analysis results.

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