Undercar monitoring and protection system and gas environment monitoring method thereof

Abstract

The present application provides an under-vehicle monitoring and protection system and a gas environment monitoring method thereof, the under-vehicle monitoring and protection system comprising: an under-vehicle monitoring device and a control box; the under-vehicle monitoring device comprises a sealing cover, a ventilation pipe, a camera module and several fill light modules, the camera module and the several fill light modules are arranged in the sealing cover, and the ventilation pipe is connected to the sealing cover; the control box comprises a gas exchange device, an environmental monitoring unit, a drying pipe and a main control unit, the air outlet of the gas exchange device is connected to the air inlet of the ventilation pipe, the air outlet of the ventilation pipe is connected to the air inlet of the environmental monitoring unit, the air outlet of the environmental monitoring unit is connected to the air inlet of the drying pipe, and the air outlet of the drying pipe is connected to the air inlet of the gas exchange device; the under-vehicle monitoring and protection system of the present application realizes the maintenance and monitoring of the internal environment of the under-vehicle monitoring device, ensuring that the camera operates in a suitable working environment.

Description

Technical Field

[0001] The present application belongs to the field of under-vehicle monitoring technology, and more specifically, relates to an under-vehicle monitoring and protection system and a gas environment monitoring method thereof. Background Art

[0002] Important locations such as border inspection and customs require strict control over the entry and exit of personnel, drivers, and passengers. Therefore, under-vehicle surveillance systems are installed in key locations to prevent prohibited items or unauthorized individuals from entering controlled areas by hiding under vehicles. Under-vehicle surveillance equipment has been widely used in intelligent transportation, border inspection and customs checkpoints, and unmanned self-service transportation channels are also becoming increasingly popular. Under-vehicle surveillance typically uses line array cameras. For 24 / 7 under-vehicle monitoring, the cameras must be buried underground. Under-vehicle surveillance works by using a line array camera to scan the underside of passing vehicles and then stitching the images together to create a static image for inspection by inspectors.

[0003] In existing technology, fixed underground cameras are typically enclosed in a metal casing and protected by a glass cover. Fluctuations in ambient temperature and the heat generated by the camera's operation can easily cause moisture to build up inside the camera's cavity. Furthermore, lanes are subject to potential damage from vehicles, rain, and high temperatures, which can compromise the seals of the metal casing and glass cover. Alternatively, short circuits between the underground camera and internal components like the fill light can cause smoke or burns. These hidden dangers are often impossible to detect in advance, and maintenance is often only performed when the equipment becomes unusable and affects undercarriage scanning. This can lead to lengthy maintenance times, requiring component-by-component inspections, disrupting normal lane inspections. Furthermore, late detection can exacerbate equipment damage, shortening its service life. Summary of the Invention

[0004] The purpose of the embodiments of the present application is to provide a vehicle bottom monitoring and protection system and a gas environment monitoring method thereof, so as to solve the technical problems of insufficient equipment maintenance and monitoring in the vehicle bottom monitoring process in the prior art.

[0005] To achieve the above-mentioned purpose, the technical solution adopted in this application is: to provide a vehicle bottom monitoring and protection system, the vehicle bottom monitoring and protection system comprising: a vehicle bottom monitoring device and a control box;

[0006] The vehicle bottom monitoring device includes a sealing cover, a ventilation pipe, a camera module and a plurality of fill light modules, wherein the camera module and the plurality of fill light modules are arranged in the sealing cover, and the ventilation pipe is in communication with the sealing cover;

[0007] The control box includes a gas exchange device, an environmental monitoring unit, a drying tube and a main control unit, the gas outlet of the gas exchange device is connected to the gas inlet of the ventilation tube, the gas outlet of the ventilation tube is connected to the gas inlet of the environmental monitoring unit, the gas outlet of the environmental monitoring unit is connected to the gas inlet of the drying tube, and the gas outlet of the drying tube is connected to the gas inlet of the gas exchange device;

[0008] Among them, the main control unit is electrically connected to the camera module, the fill light module, the gas exchange equipment and the environmental monitoring unit respectively. The fill light module can provide fill light for the bottom of the vehicle. The camera module can obtain the monitoring image of the bottom of the vehicle and send it to the main control unit. The main control unit can control the gas exchange equipment to ventilate the inside of the sealing cover through the ventilation pipe. The environmental monitoring unit can analyze the gas environment. The drying pipe can dry the gas.

[0009] Preferably, the environmental monitoring unit includes a temperature and humidity sensor, which can detect the temperature and humidity in the gas.

[0010] Preferably, the environment monitoring unit includes a pressure sensor, which can detect the pressure in the gas.

[0011] Preferably, the environment monitoring unit includes a smoke sensor, which is capable of detecting smoke content in the gas.

[0012] Preferably, a plurality of partitions are provided in the sealing cover, and the plurality of partitions divide the sealing cover into a plurality of sealed chambers. The camera module and each of the fill light modules are respectively located in one of the sealed chambers, and each of the sealed chambers is connected to the gas exchange equipment and the environmental monitoring unit respectively through an independent ventilation pipe.

[0013] Preferably, a solenoid valve is provided on the ventilation pipe connecting each of the sealed chambers and the gas exchange device, and each of the solenoid valves is electrically connected to the main control unit.

[0014] Preferably, a vacuum box is further provided in each sealed chamber, and the camera module and each fill light module are respectively located in the vacuum box of the corresponding sealed chamber.

[0015] Preferably, the underbody monitoring and protection system further includes an industrial computer, a switch and a remote control terminal, the industrial computer is electrically connected to the main control unit, the switch is connected to the industrial computer via Ethernet, and the remote control terminal is connected to the switch via Ethernet.

[0016] The present application also provides a method for monitoring the gas environment under vehicle monitoring, based on the above-mentioned vehicle under vehicle monitoring protection system, the method for monitoring the gas environment under vehicle monitoring comprises the following steps:

[0017] An abnormality is detected in the under-vehicle monitoring image;

[0018] Ventilate the undercar monitoring device;

[0019] Detect and dry the gas environment;

[0020] Output gas environment detection data to determine the cause of abnormality.

[0021] Preferably, the vehicle bottom monitoring gas environment monitoring method further comprises the following steps:

[0022] Only one solenoid valve is opened at a time, and the gas environment of each sealed chamber is detected one by one to locate the position of the sealed chamber where the abnormality occurs.

[0023] Compared with the existing technology, the undercar monitoring and protection system provided by the present application uses the gas exchange equipment to ventilate the interior of the undercar monitoring device through the ventilation pipe. The environmental monitoring unit can analyze the gas environment and determine the working environment of the undercar monitoring device based on the gas environment analysis results. At the same time, the drying pipe can dry the gas and pass the dried gas back into the undercar monitoring device to form a gas circulation system, thereby realizing the maintenance and monitoring of the internal environment of the undercar monitoring device, ensuring that the camera module operates in a suitable working environment, and improving the life of electronic components.

[0024] Compared with the existing technology, the under-vehicle monitoring gas environment monitoring method provided in the present application is based on the under-vehicle monitoring protection system as described above. By detecting an abnormality in the under-vehicle monitoring image, the under-vehicle monitoring device is started to be ventilated, and the gas environment is then tested and dried. The gas environment test data is output and the cause of the abnormality is determined so that maintenance personnel can discover the problem in the first time and perform targeted maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0026] Figure 1 This is a schematic diagram of the overall block diagram of the vehicle underbody monitoring and protection system provided in an embodiment of the present application;

[0027] Figure 2 for Figure 1 A schematic diagram of the three-dimensional structure of the vehicle bottom monitoring device;

[0028] Figure 3 for Figure 2 Schematic diagram of the exploded structure of the vehicle bottom monitoring device;

[0029] Figure 4 for Figure 1 Schematic diagram of the three-dimensional structure of the control box in the state where the box door is open;

[0030] Figure 5 for Figure 4 A schematic diagram of the three-dimensional structure of the control box in another perspective with the door open;

[0031] Figure 6 This is a schematic block diagram of an undercar monitoring and protection system provided by another embodiment of the present application;

[0032] Figure 7 for Figure 2 A schematic diagram of the three-dimensional structure of the underbody monitoring device when the sealing cover is hidden;

[0033] Figure 8 Flowchart of the method for monitoring the gas environment under the vehicle provided in an embodiment of the present application. DETAILED DESCRIPTION

[0034] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0035] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0036] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0037] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0038] Please also refer to Figures 1 to 4 The vehicle bottom monitoring and protection system 100 provided in the embodiment of the present application is now described. The vehicle bottom monitoring and protection system 100 includes: a vehicle bottom monitoring device 10 and a control box 20.

[0039] Specifically, the undercar monitoring device 10 includes a sealing cover 11 , a ventilation pipe 12 , a camera module 13 and several fill light modules 14 . The camera module 13 and the several fill light modules 14 are arranged in the sealing cover 11 , and the ventilation pipe 12 is connected to the sealing cover 11 .

[0040] Specifically, the control box 20 includes a gas exchange device 21, an environmental monitoring unit 22, a drying pipe 23 and a main control unit 24. The air outlet of the gas exchange device 21 is connected to the air inlet of the ventilation pipe 12, the air outlet of the ventilation pipe 12 is connected to the air inlet of the environmental monitoring unit 22, the air outlet of the environmental monitoring unit 22 is connected to the air inlet of the drying pipe 23, and the air outlet of the drying pipe 23 is connected to the air inlet of the gas exchange device 21.

[0041] Among them, the main control unit 24 is electrically connected to the camera module 13, the fill light module 14, the gas exchange equipment 21 and the environmental monitoring unit 22 respectively. The fill light module 14 can fill light under the vehicle, the camera module 13 can obtain the monitoring image under the vehicle and send it to the main control unit 24, the main control unit 24 can control the gas exchange equipment 21 to ventilate the inside of the sealing cover 11 through the ventilation pipe 12, the environmental monitoring unit 22 can analyze the gas environment, and the drying pipe 23 can dry the gas.

[0042] It can be understood that the camera module 13 includes a monitoring camera and a linear array camera. The under-vehicle monitoring device 10 is pre-buried in the middle of the inspection lane. When the vehicle passes through the inspection lane in which the under-vehicle monitoring device 10 is pre-buried, the monitoring camera can capture the video image of the vehicle chassis in real time. The linear array camera is used to continuously capture local images of the vehicle chassis. When the continuous capture of the local images of the vehicle chassis is processed by the image stitching algorithm, a complete scan image of the vehicle chassis can be obtained, and the safety of the vehicle chassis can be judged to prevent prohibited items or unauthorized personnel from entering the control area by hiding under the vehicle.

[0043] Please also refer to Figure 5 The control box 20 is typically located on a safety island in the lane. It can be equipped with electronic components such as a 24V power switch 25, a 12V power switch 26, an air switch 27, a lightning arrester 28, and a relay 29 to meet the power supply and safety requirements of the entire lane. Furthermore, the control box 20 can be connected to an industrial computer in the monitoring room, allowing inspection personnel to review scanned images of vehicle chassis.

[0044] Since the under-vehicle monitoring device 10 is buried under the road for a long time, it may be crushed by vehicles, soaked by rain, exposed to high temperatures, etc. at any time, which may affect the under-vehicle monitoring device 10. In order to immediately discover problems and facilitate maintenance at the first time, there are usually two ways.

[0045] The first method is manually activated by an inspector. When the inspector reviews the vehicle chassis scan image, they can make a judgment based on the vehicle chassis scan image. For example, a cracked mirror of the camera module 13 will form a clearly visible crack in the vehicle chassis scan image, fogging inside the undercarriage monitoring device 10 will blur the vehicle chassis scan image, and damage to the fill light module 14 will darken the vehicle chassis scan image. After the inspector manually activates the method, the gas exchange device 21 will ventilate the sealed cover 11 of the undercarriage monitoring device 10 through the ventilation pipe 12. During the ventilation process, because the outlet of the gas exchange device 21 is connected to the air inlet of the ventilation pipe 12, and the outlet of the ventilation pipe 12 is connected to the air inlet of the environmental monitoring unit 22, the gas discharged from the undercarriage monitoring device 10 first passes through the environmental monitoring unit 22. The environmental monitoring unit 22 can analyze the gas environment and determine the operating environment of the undercarriage monitoring device 10 based on the gas environment analysis results, and ultimately determine whether maintenance or shutdown is required. Since the air outlet of the environmental monitoring unit 22 is connected to the air inlet of the drying pipe 23, and the air outlet of the drying pipe 23 is connected to the air inlet of the gas exchange device 21, the drying pipe 23 can dry the gas and pass the dried gas into the under-vehicle monitoring device 10 again. Such gas flow can prevent water vapor from entering the gas exchange device, thereby causing damage to the gas exchange device. On the other hand, the internal environment of the under-vehicle monitoring device 10 is also dried to ensure that the camera module 13 operates in a suitable working environment and improve the life of electronic components.

[0046] The second method is to automatically start the drying and gas environment detection, for example, automatically start the drying and gas environment detection after an interval of ten minutes, or perform a drying and gas environment detection every time after completing the underbody detection of a vehicle, so as to detect abnormalities at the first time, which will reduce losses and increase the service life of the underbody monitoring device 10.

[0047] Compared with the prior art, the undercar monitoring and protection system 100 provided in the present application is capable of ventilating the interior of the undercar monitoring device 10 through the ventilation pipe 12 through the gas exchange equipment 21, and the environmental monitoring unit 22 is capable of analyzing the gas environment and determining the working environment of the undercar monitoring device 10 based on the gas environment analysis results. At the same time, the drying pipe 23 is capable of drying the gas and re-introducing the dried gas into the undercar monitoring device 10 to form a gas circulation system, thereby realizing the maintenance and monitoring of the internal environment of the undercar monitoring device 10, ensuring that the camera module 13 operates in a suitable working environment, and improving the life of electronic components.

[0048] In another embodiment of the present application, the environment monitoring unit 22 includes a temperature and humidity sensor (not shown), which can detect the temperature and humidity in the gas.

[0049] It is understandable that, through gas circulation, the dried gas can be introduced into the interior of the under-vehicle monitoring device 10 again, gradually reducing the humidity inside the under-vehicle monitoring device 10. When the temperature and humidity sensor detects that the current humidity has dropped below the threshold, it can stop working. When the temperature and humidity sensor detects that the current humidity is still very high after a period of gas circulation, it can be determined that the sealing cover 11 may have broken and water has entered, and an alarm is issued so that the staff can find the problem and perform maintenance as soon as possible. In addition, when the temperature and humidity sensor detects that the current temperature is too high, it may be that the internal circuit is short-circuited. In order to avoid burning out more components, an alarm is issued so that the staff can perform maintenance as soon as possible.

[0050] Furthermore, the environment monitoring unit 22 includes a pressure sensor (not shown), which can detect the pressure in the gas.

[0051] It is understood that the pressure sensor can detect the air pressure during gas circulation. When the under-vehicle monitoring device 10 is operating normally, the air pressure value detected by the pressure sensor fluctuates slightly. When the air pressure value detected by the pressure sensor decreases significantly and approaches standard atmospheric pressure, it indicates that the sealing cover 11 of the under-vehicle monitoring device 10 has ruptured, and an alarm is issued to facilitate prompt maintenance.

[0052] Furthermore, the environment monitoring unit 22 includes a smoke sensor (not shown), which can detect the smoke content in the gas.

[0053] It is understood that the pressure sensor can detect the smoke content in the gas, and when the under-vehicle monitoring device 10 is operating normally, the smoke sensor cannot detect the smoke. When the smoke content in the gas detected by the pressure sensor exceeds a threshold, it indicates that there is a short circuit or fire inside the under-vehicle monitoring device 10. To avoid burning more components, an alarm is issued so that personnel can perform maintenance immediately.

[0054] In another embodiment of this application, please refer to Figure 3 and Figure 7 A plurality of partitions 15 are provided in the sealing cover 11, and the plurality of partitions 15 divide the sealing cover 11 into a plurality of sealed chambers 16. The camera module 13 and each of the fill light modules 14 are respectively located in one of the sealed chambers 16, and each of the sealed chambers 16 is connected to the gas exchange device 21 and the environmental monitoring unit 22 through an independent ventilation pipe 12.

[0055] It can be understood that by setting up a number of the partitions 15 to separate the sealing cover 11 into a number of sealed chambers 16, on the one hand, the pressure-bearing capacity of the sealing cover 11 can be improved. Preferably, the partitions 15 are arranged vertically, and each partition 15 can increase the pressure-bearing capacity, which is beneficial to increasing the deformation resistance of the sealing cover 11. On the other hand, after the sealing cover 11 is divided into a number of sealed chambers 16 by setting up a number of the partitions 15, each sealed chamber 16 is independent of each other, and even if a fire or water ingress occurs in the device in one of the sealed chambers 16, it will not affect the devices in other sealed chambers 16. In addition, since each of the sealed chambers 16 is connected to the gas exchange equipment 21 and the environmental monitoring unit 22 respectively through the independent ventilation pipe 12, each sealed chamber 16 can still be ventilated, dried and the gas environment detected at the same time.

[0056] It is worth adding that Figure 3 and Figure 7 The ventilation tube 12 is merely a schematic diagram. The ventilation tube 12 can be composed of several smaller diameter air tubes (not shown) placed together within a larger diameter air tube (not shown), each of which is sealedly connected to two smaller diameter air tubes. The other end of the smaller diameter air tube is connected to the gas exchange device 21 or the environmental monitoring unit 22. Of course, the relevant wires can also be arranged in the larger air tube.

[0057] Furthermore, a solenoid valve (not shown) is provided on the ventilation pipe 12 connecting each of the sealed chambers 16 and the gas exchange device 21 , and each of the solenoid valves is electrically connected to the main control unit 24 .

[0058] It is understandable that the main control unit 24 can control the switch of each solenoid valve, and the switch of the solenoid valve can control the ventilation state of each sealed chamber 16. In this way, under normal circumstances, all solenoid valves are in the open state. At this time, when the gas exchange device 21 is working, it can realize ventilation, drying and gas environment detection of each sealed chamber 16 at the same time. If the detection result of the environmental monitoring unit 22 is normal, the gas exchange device 21 will work. If the detection result of the environmental monitoring unit 22 is abnormal, the ventilation state of each sealed chamber 16 can be controlled one by one, that is, only one solenoid valve is opened at a time, and the gas environment of each sealed chamber 16 is detected one by one, so as to accurately locate the position of the sealed chamber 16 where the abnormality occurs, so that the staff can perform maintenance on the sealed chamber 16 in the first time, reducing the time for the staff to detect the components between each sealed chamber 16 one by one, reducing the time required for maintenance, and improving traffic efficiency.

[0059] Furthermore, since the camera module 13 generates more heat than the fill light module 14, the operating temperature of the camera module 13 can easily exceed the rated operating temperature during hot summer weather. By controlling the solenoid valve, the gas exchange device 21 can circulate gas only to the sealed chamber 16 where the camera module 13 is located, thereby quickly reducing the temperature of the sealed chamber 16 where the camera module 13 is located.

[0060] Further, please also refer to Figure 3 and Figure 7 A vacuum box 17 is further provided in each sealed chamber 16 , and the camera module 13 and each fill light module 14 are respectively located in the vacuum box 17 of the corresponding sealed chamber 16 .

[0061] It is understood that the vacuum box 17 provided within each sealed chamber 16 provides secondary protection. Specifically, if the sealing of the sealed chamber 16 fails, the vacuum box 17 provides temporary protection for the camera module 13 and the fill light module 14 within the vacuum box 17, preventing failures caused by water immersion or high temperatures due to a breakdown in the seal. Furthermore, the vacuum box 17 maintains the camera module 13 and each fill light module 14 in a vacuum environment for a long period of time, which helps reduce the corrosive effects of a humid environment on components and also provides a flame retardant effect.

[0062] In another embodiment of this application, please refer to Figure 6The underbody monitoring and protection system 100 further includes an industrial computer 30, a switch 40, and a remote control terminal 50. The industrial computer 30 is electrically connected to the main control unit 24, the switch 40 is connected to the industrial computer 30 via Ethernet, and the remote control terminal 50 is connected to the switch 40 via Ethernet.

[0063] It can be understood that the industrial computer 30 can be connected to the main control boards of multiple control boxes 20 at the same time, analyze and summarize the vehicle underbody detection data of multiple lanes and the analysis data of the gas exchange equipment 21, and finally send the data conversion to the remote control terminal 50 through the switch 40 to achieve the purpose of remote monitoring.

[0064] See also Figure 8 The present application also provides a method 200 for monitoring the gas environment under vehicle monitoring. Based on the above-described vehicle under vehicle monitoring and protection system 100, the method 200 for monitoring the gas environment under vehicle monitoring includes the following steps:

[0065] An abnormality is detected in the under-vehicle monitoring image;

[0066] Ventilate the vehicle bottom monitoring device 10;

[0067] Detect and dry the gas environment;

[0068] Output gas environment detection data to determine the cause of abnormality.

[0069] It is understood that detecting an abnormality in the undercar monitoring image can be done manually or through image recognition. For example, deep learning image recognition can be used to detect glass cracks, smoke, fogging, water immersion, etc. in the undercar monitoring image. By detecting and drying the gas environment, the temperature and humidity, air pressure, smoke content, etc. within the undercar monitoring device 10 can be detected to determine whether the undercar monitoring device 10 has an abnormality such as a short circuit, fire, water immersion, excessive humidity, excessive temperature, or a cracked sealing cover 11, so that maintenance personnel can immediately discover the problem and perform targeted maintenance. If the cause is simply excessive humidity, drying the gas can keep the interior of the undercar monitoring device 10 dry, reducing the impact of humidity on the service life and preventing fogging from affecting the imaging quality of the camera module 13. The gas environment is detected to ensure that the humidity remains within the threshold range.

[0070] Compared with the prior art, the under-vehicle gas environment monitoring method 200 provided in the present application is based on the under-vehicle monitoring protection system 100 as described above. By detecting an abnormality in the under-vehicle monitoring image, ventilation of the under-vehicle monitoring device 10 is started, and the gas environment is then tested and dried, and gas environment test data is output to determine the cause of the abnormality, so that maintenance personnel can discover the problem in the first time and perform targeted maintenance.

[0071] In another embodiment of this application, please refer to Figure 8 The vehicle bottom monitoring gas environment monitoring method 200 further includes the following steps:

[0072] Only one solenoid valve is opened each time, and the gas environment of each sealed chamber 16 is detected one by one to locate the position of the sealed chamber 16 where the abnormality occurs.

[0073] It can be understood that by detecting the gas environment of each sealed chamber 16 one by one, the position of the sealed chamber 16 where the abnormality occurs can be accurately located, so that the staff can perform maintenance on the sealed chamber 16 as soon as possible, reducing the time for the staff to detect the components between each sealed chamber 16 one by one, reducing the time required for maintenance, and improving traffic efficiency.

[0074] It is worth noting that the gas environments in multiple sealed chambers 16 may be abnormal at the same time. In this case, even if the gas environment in one sealed chamber 16 is detected to be abnormal, the remaining sealed chambers 16 still need to be checked to find all the sealed chambers 16 with abnormal gas environments.

[0075] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A vehicle bottom monitoring and protection system, characterized in that: include: Under-vehicle monitoring device and control box; the under-vehicle monitoring device is pre-buried in the middle of the inspection lane; The vehicle bottom monitoring device includes a sealing cover, a ventilation pipe, a camera module and a plurality of fill light modules, wherein the camera module and the plurality of fill light modules are arranged in the sealing cover, and the ventilation pipe is in communication with the sealing cover; The control box includes a gas exchange device, an environmental monitoring unit, a drying tube and a main control unit, the gas outlet of the gas exchange device is connected to the gas inlet of the ventilation tube, the gas outlet of the ventilation tube is connected to the gas inlet of the environmental monitoring unit, the gas outlet of the environmental monitoring unit is connected to the gas inlet of the drying tube, and the gas outlet of the drying tube is connected to the gas inlet of the gas exchange device; The main control unit is electrically connected to the camera module, the fill light module, the gas exchange device, and the environmental monitoring unit, respectively. The fill light module can provide fill light for the bottom of the vehicle. The camera module can obtain monitoring images of the bottom of the vehicle and send them to the main control unit. The main control unit can control the gas exchange device to ventilate the inside of the sealing cover through the ventilation pipe. The environmental monitoring unit can analyze the gas environment. The drying pipe can dry the gas. The environment monitoring unit includes a temperature and humidity sensor, which can detect the temperature and humidity in the gas.

2. The vehicle bottom monitoring and protection system according to claim 1, characterized in that: The environment monitoring unit includes a pressure sensor, which can detect the pressure in the gas.

3. The vehicle bottom monitoring and protection system according to claim 2, characterized in that: The environment monitoring unit includes a smoke sensor capable of detecting smoke content in gas.

4. The vehicle bottom monitoring and protection system according to claim 3, characterized in that: A plurality of partitions are provided in the sealing cover, and the plurality of partitions divide the sealing cover into a plurality of sealed chambers. The camera module and each of the fill light modules are respectively located in one of the sealed chambers, and each of the sealed chambers is connected to the gas exchange equipment and the environmental monitoring unit respectively through an independent ventilation pipe.

5. The vehicle bottom monitoring and protection system according to claim 4, characterized in that: A solenoid valve is provided on the ventilation pipe connecting each sealed chamber and the gas exchange device, and each solenoid valve is electrically connected to the main control unit.

6. The vehicle bottom monitoring and protection system according to claim 5, characterized in that: A vacuum box is further provided in each sealed chamber, and the camera module and each fill light module are respectively located in the vacuum box of the corresponding sealed chamber.

7. The vehicle bottom monitoring and protection system according to any one of claims 1 to 6, characterized in that: The undercar monitoring and protection system further includes an industrial computer, a switch, and a remote control terminal. The industrial computer is electrically connected to the main control unit, the switch is connected to the industrial computer via Ethernet, and the remote control terminal is connected to the switch via Ethernet.

8. A method for monitoring the gas environment under a vehicle, based on the under-vehicle monitoring and protection system according to any one of claims 5 to 6, characterized in that: The following steps are involved: An abnormality is detected in the under-vehicle monitoring image; Ventilate the undercar monitoring device; Detect and dry the gas environment; Output gas environment detection data to determine the cause of abnormality.

9. The method for monitoring the gas environment under vehicle as claimed in claim 8, characterized in that: The vehicle bottom monitoring gas environment monitoring method also includes the following steps: Only one solenoid valve is opened at a time, and the gas environment of each sealed chamber is detected one by one to locate the position of the sealed chamber where the abnormality occurs.

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