Fire scene gas detection device and method based on multimodal sensor array

Abstract

The present invention discloses a fire scene gas detection device and method based on a multimodal sensor array, specifically relating to the field of gas detection technology, including a detection tray, a wireless controller, an electrochemical sensor, and a gas detection assembly; the gas detection assembly includes a metal oxide semiconductor sensor, a carbon dioxide infrared sensor, a PID sensor, a temperature and humidity sensor, a pressure sensor, multiple positioning cylinders, two springs, a sliding column, and a triangular guide block. The present invention utilizes a gas detection assembly that ensures that each sensor can accurately detect different gases in turn according to a specified fire coordinate position, thereby improving the accuracy of multimodal array detection of fire scene gases. This solves the problem that limitations in the multimodal sensor array detection process make it difficult to ensure that each sensor can accurately detect different gases according to a specified fire coordinate position, thereby affecting the accuracy of the overall detection results.

Description

Technical Field

[0001] The present invention relates to the technical field of gas detection, and more particularly to a fire investigation site gas detection device and method based on a multimodal sensor array. Background Art

[0002] In fire investigations, gas composition detection is a key technical means of analyzing fire sources, combustible materials, and fire spread paths. Currently, common on-site gas detection devices use a single or small number of sensors, such as electrochemical sensors or infrared sensors, for sensing and detection. Fire investigation on-site gas detection devices quickly and accurately detect gas composition and concentration, providing critical data support for fire investigations, helping to determine the cause of the fire, ensure personnel safety, and assist in rescue operations.

[0003] Among existing published technical documents, patent publication number CN210269832U discloses a combustible gas detection device for fire scene investigations. This technology, comprised of a detection housing, a micro-alarm, a gas sensor, a smoke sensor, and a control processor, can detect the concentration of combustible gas at a fire scene while also monitoring smoke concentration in real time. When smoke concentration exceeds a preset range, posing a significant threat to the human body, a signal is promptly issued to alert personnel to take preventive measures. However, this technology still presents the following issues.

[0004] Although the gas detection device at the fire scene can detect the concentration of combustible gases, it has shortcomings in precise positioning, especially when using multi-sensor array distributed detection. Due to the different positions of each sensor, it is difficult to achieve accurate detection in turn at the designated fire location. This limitation makes it difficult to ensure that each sensor can accurately detect different gases according to the designated fire coordinate position during the multi-modal sensor array detection process, which in turn affects the accuracy of the overall detection results. Summary of the Invention

[0005] To achieve the above objectives, the present invention provides the following technical solution: a fire investigation site gas detection device based on a multimodal sensor array, comprising a detection tray and a wireless controller. An electrochemical sensor is disposed below the detection tray, and a gas detection assembly is mounted on one side of the electrochemical sensor. The gas detection assembly includes multiple sensors mounted on one side of the electrochemical sensor for detecting different gases. The multiple sensors include a metal oxide semiconductor sensor mounted on one side of the electrochemical sensor, a carbon dioxide infrared sensor mounted on one side of the metal oxide semiconductor sensor, a PID sensor mounted on one side of the carbon dioxide infrared sensor, a temperature and humidity sensor mounted on one side of the PID sensor, and a pressure sensor mounted on one side of the temperature and humidity sensor. Multiple positioning cylinders are slidably connected to the inner wall of the detection tray, and the outer wall of each positioning cylinder is fixedly connected to two spring clips, with a sliding post disposed between the two spring clips, and one end of each sliding post fixedly connected to a triangular guide block. A bracket is fixedly connected to the lower surface of the detection tray, near the pressure sensor. The wireless controller is fixedly located on the outer wall of the bracket.

[0006] Preferably, the plurality of positioning cylinders are fixedly connected to the electrochemical sensor, metal oxide semiconductor sensor, carbon dioxide infrared sensor, PID sensor, temperature and humidity sensor, and air pressure sensor, respectively, and the plurality of positioning cylinders are arranged in a circular ring with equal spacing. The electrochemical sensor, metal oxide semiconductor sensor, carbon dioxide infrared sensor, PID sensor, temperature and humidity sensor, and air pressure sensor are all electrically connected to the wireless controller; the sliding column is fixedly connected to the positioning cylinder, and the sliding column is slidably connected to the detection slot disk. The spring clip is fixedly connected to the detection slot disk, and the top of each positioning cylinder is fixedly connected to a center positioning column, the center point of the center positioning column is coaxial with the center point of the positioning cylinder, and the plurality of center positioning columns are slidably connected to the detection slot disk; a positioning distance sensor is fixedly installed on the top of the inner wall of the detection slot disk, and the positioning distance sensor is electrically connected to the wireless controller. The lower surfaces of the electrochemical sensor, metal oxide semiconductor sensor, carbon dioxide infrared sensor, PID sensor, temperature and humidity sensor, and air pressure sensor are all on the same horizontal plane; the outer wall of the sliding column is smooth. A UWB positioning chip is installed on the top of the positioning distance sensor, and a GPS positioning module is installed on the top of the UWB positioning chip. The UWB positioning chip and the GPS positioning module are both electrically connected to the wireless controller; a convex strip is fixedly connected to the outer wall of the sliding column, the positioning cylinder and the triangular guide block are both fixedly connected to the convex strip, and the convex strip is slidably connected to the detection slot plate.

[0007] When this technology is in use, the force applied to the sliding column also drives the ridge toward the center of the detection slot, causing the positioning cylinder to elastically deform the two springs. This positioning cylinder then drives the center positioning column toward the center of the detection slot. The sensing distance matches the distance set by the wireless controller, and the electrochemical sensor is precisely positioned at the coordinates of the UWB positioning chip. The electrochemical sensor is immediately activated, thus detecting carbon monoxide. The tilted push plate continues to rotate, contacting the second triangular guide block. The second positioning cylinder drives the metal oxide semiconductor sensor to the center of the UWB positioning chip, activating the metal oxide semiconductor sensor to detect volatile organic compounds. The tilted push plate continues to rotate, pressing against the third triangular guide block. The third positioning cylinder drives the carbon dioxide infrared sensor to the center of the UWB positioning chip, activating the CO2 infrared sensor to detect CO2. The tilted push plate continues to rotate, pressing against the fourth triangular guide block. The fourth positioning cylinder drives the PID sensor to the center of the UWB positioning chip, activating the PID sensor to detect combustible gases. The tilted push plate continues to rotate and press against the fifth triangular guide block. The fifth positioning cylinder drives the temperature and humidity sensor to the center of the UWB positioning chip. Turning on the temperature and humidity sensor allows you to detect the temperature and humidity at this location. The tilted push plate continues to rotate and press against the sixth triangular guide block. The sixth positioning cylinder drives the air pressure sensor to the center of the UWB positioning chip. Turning on the air pressure sensor allows you to detect the air pressure.

[0008] Preferably, an inclined push plate is slidably connected to one side of one of the triangular guide blocks; a rotating column is fixedly connected to one side of the inclined push plate, and a rotating bar is fixedly connected to the top of the rotating column, a stepper motor is installed at one end of the rotating bar, the stepper motor is electrically connected to the wireless controller, and the output end of the stepper motor is fixedly connected to the rotating bar; a supporting block is fixedly connected to one side of the stepper motor, and the supporting block is fixedly connected to the detection slot disk, a positioning slide is provided on one side of the rotating column, and the positioning slide is fixedly connected to the rotating bar, the positioning slide is slidably connected to the detection slot disk, a battery is provided on one side of the positioning slide, and the battery is fixedly connected to the detection slot disk.

[0009] When this technology is in use, a stepper motor drives the rotating bar, which rotates the positioning slide within the detection slot disc. The rotating column drives the sleeve block, and the bearing ring rotates on the outer wall of the detection slot disc. Simultaneously, the bearing ring rotates between two limit rings, and the tilted push plate squeezes the triangular guide block. As the tilted push plate's inclined surface squeezes the triangular guide block's inclined surface, the triangular guide block is forced to drive the slide column toward the center of the detection slot disc.

[0010] Preferably, a sleeve block is fixedly connected to the upper surface of the inclined push plate, and a bearing ring is fixedly connected to the outer wall of the sleeve block. The bearing ring is rotatably connected to the detection slot disk. The upper and lower surfaces of the bearing ring are both rotatably connected to limit rings, and both limit rings are fixedly connected to the detection slot disk. The positioning distance sensor is provided with a plurality of limit rods on the outside, and the plurality of limit rods are arranged in a circular ring with equal spacing. The plurality of limit rods are slidably connected to the detection slot disk, and a linkage bar is mounted on the upper surface of the limit rods, and the plurality of limit rods are fixedly connected to the linkage bar. A pressure sensor is fixedly mounted on the upper surface of the linkage bar. An electric cylinder is mounted on the upper surface of the pressure sensor, and the electric cylinder is fixedly connected to the detection slot disk. The sensing end of the pressure sensor is fixedly connected to the output end of the electric cylinder. The pressure sensor and the electric cylinder are both electrically connected to a wireless controller. The inner wall of the positioning cylinder is provided with a plurality of positioning holes, and the plurality of positioning holes are arranged in a circular ring with equal spacing.

[0011] The outer wall of the limiting rod is a smooth surface, and the inner wall of the positioning hole is a smooth surface.

[0012] When this technology is in use, if it is necessary to perform fixed position detection on one of the electrochemical sensors, metal oxide semiconductor sensors, carbon dioxide infrared sensors, PID sensors, temperature and humidity sensors, and air pressure sensors, the electrochemical sensor is selected. When the electrochemical sensor is precisely located at the detection point coordinates specified by the UWB positioning chip, the electric cylinder pushes the pressure sensor downward, and the linkage bar drives multiple limit rods to move downward, and the multiple limit rods are respectively inserted into the multiple positioning holes.

[0013] A method for detecting gas at a fire scene based on a multimodal sensor array comprises the following steps:

[0014] Step 1: Detection and positioning: Hold the bracket with your hand, the bracket supports the detection slot, and the UWB positioning chip coordinates the detection point of the detection slot;

[0015] Step 2: Drive in turn, the stepper motor drives the rotating bar to rotate, the inclined surface of the inclined push plate squeezes the inclined surface of the triangular guide block, and the sliding column approaches the center point of the detection groove disk;

[0016] Step 3: The array takes turns to locate and detect. The electrochemical sensor, metal oxide semiconductor sensor, carbon dioxide infrared sensor, PID sensor, temperature and humidity sensor, and air pressure sensor are positioned at the designated coordinates for detection in turn.

[0017] Step 4: Lock and continue testing. When the electrochemical sensor is located at the detection point coordinates specified by the UWB positioning chip, multiple limit rods are inserted into multiple positioning holes respectively, and the electrochemical sensor is continuously used for on-site fire detection.

[0018] Technical effects and advantages of the present invention:

[0019] The present invention adopts a gas detection component. The force applied to the sliding column will also drive the convex strip to approach the center point of the detection slot disk. The positioning cylinder drives the two spring pieces to undergo elastic deformation. The electrochemical sensor approaches the center point of the detection slot disk. The positioning distance sensor senses the distance to the center positioning column. The center point of the positioning distance sensor is aligned with the center point of the center positioning column. The electrochemical sensor is precisely located at the positioning coordinate position of the UWB positioning chip. The metal oxide semiconductor sensor, carbon dioxide infrared sensor, PID sensor, temperature and humidity sensor and air pressure sensor can also be precisely located at the positioning coordinate position of the UWB positioning chip in turn, thereby realizing accurate detection of different gases at the fire detection site. It can ensure that each sensor can accurately detect different gases according to the specified fire coordinate position, thereby improving the accuracy of the multi-modal array in detecting gases at the fire detection site.

[0020] The present invention uses a motor to drive the rotating bar, which in turn drives the positioning slide rod within the groove disc. Simultaneously, the rotating column links the sleeve block and bearing ring, allowing them to rotate and position themselves on the outer wall of the detection groove disc. The inclined push plate on the rotating column rotates and squeezes the triangular guide block, which drives the slide rod toward the center of the detection groove disc. This design ensures stable transmission and precise positioning of multiple sensors in turn, providing reliable support for subsequent multi-sensor testing and improving detection accuracy and stability.

[0021] 3. In the present invention, when the electrochemical sensor is precisely located at the positioning coordinate position of the UWB positioning chip, the stepper motor is turned off by the wireless controller, the electric cylinder pushes the pressure sensor downward, the pressure sensor pushes the linkage bar downward, and multiple limit rods are respectively inserted into multiple positioning holes. The electrochemical sensor can be used continuously and stably to perform detection at the specified coordinate position. Other sensors such as metal oxide semiconductor sensors, carbon dioxide infrared sensors, PID sensors, temperature and humidity sensors, and air pressure sensors can also be stably positioned at the specified position for continuous detection according to this method. Multiple sensors can be used for detection in turn, and a single sensor can be controlled to continuously perform gas detection at the use position, and the detection applicability is wider. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the fire scene gas detection device based on the multimodal sensor array of the present invention when viewed from above.

[0023] Figure 2 It is a schematic diagram of the partial structure of the connection between the bracket and the detection slot plate of the present invention.

[0024] Figure 3 It is a schematic diagram of the partial structure of the connection between the inclined push plate and the triangular guide block of the present invention.

[0025] Figure 4 It is a schematic diagram of the partial structure of the vertical section of the detection slot plate of the present invention.

[0026] Figure 5 For the present invention Figure 4 Enlarged structural diagram at point A in the middle.

[0027] Figure 6 The diagram is a top view of the structure of the fire scene gas detection device based on the multimodal sensor array of the present invention.

[0028] Figure 7 It is a schematic diagram of the local structure of the connection between the rotating column and the inclined push plate of the present invention.

[0029] Figure 8 It is a schematic diagram of the partial structure of the positioning cylinder and the sleeve block of the present invention.

[0030] The accompanying drawings are marked as follows: 1. Detection slot; 2. Electrochemical sensor; 3. Metal oxide semiconductor sensor; 4. Carbon dioxide infrared sensor; 5. PID sensor; 6. Temperature and humidity sensor; 7. Air pressure sensor; 8. Positioning cylinder; 9. Spring piece; 10. Sliding column; 11. Triangular guide block; 12. Center positioning column; 13. Positioning distance sensor; 14. UWB positioning chip; 15. GPS positioning module; 16. Raised strip; 17. Tilt push plate; 18. Rotating column; 19. Rotating bar; 20. Stepping motor; 21. Support block; 22. Positioning slide rod; 23. Battery; 24. Sleeve block; 25. Bearing ring; 26. Limiting ring; 27. Limiting rod; 28. Linkage bar; 29. ​​Pressure sensor; 30. Electric cylinder; 31. Positioning hole; 32. Bracket; 33. Wireless controller. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, 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 efforts are within the scope of protection of the present invention.

[0032] like Figure 1 - Figure 8 The fire scene gas detection device based on a multimodal sensor array is shown. The fire scene gas detection device based on a multimodal sensor array is provided with a gas detection component. The setting of the gas detection component can ensure that each sensor can accurately detect different gases according to the specified fire coordinate position, thereby improving the accuracy of the multimodal array in detecting the fire scene gas. The specific structural setting of the gas detection component is as follows.

[0033] In this embodiment, if Figure 1 - Figure 5 As shown, an electrochemical sensor 2 is provided under the detection slot disk 1, and a gas detection component is installed on one side of the electrochemical sensor 2; the gas detection component includes a plurality of sensors installed on one side of the electrochemical sensor 2, for detecting different gases, and the plurality of sensors include a metal oxide semiconductor sensor 3 installed on one side of the electrochemical sensor 2, and a carbon dioxide infrared sensor 4 is provided on one side of the metal oxide semiconductor sensor 3, a PID sensor 5 is provided on one side of the carbon dioxide infrared sensor 4, a temperature and humidity sensor 6 is installed on one side of the PID sensor 5, and an air pressure sensor 7 is provided on one side of the temperature and humidity sensor 6; the inner wall of the detection slot disk 1 is slidably connected to a plurality of positioning cylinders 8, and the outer wall of each positioning cylinder 8 is fixedly connected to two spring clips 9, a sliding column 10 is provided between the two spring clips 9, and one end of each sliding column 10 is fixedly connected to a triangular guide block 11.

[0034] Multiple positioning cylinders 8 are fixedly connected to the electrochemical sensor 2, the metal oxide semiconductor sensor 3, the carbon dioxide infrared sensor 4, the PID sensor 5, the temperature and humidity sensor 6, and the air pressure sensor 7 respectively. The multiple positioning cylinders 8 are arranged in a circular ring with equal spacing. The electrochemical sensor 2, the metal oxide semiconductor sensor 3, the carbon dioxide infrared sensor 4, the PID sensor 5, the temperature and humidity sensor 6, and the air pressure sensor 7 are all electrically connected to the wireless controller 33; the sliding column 10 is fixedly connected to the positioning cylinder 8, and the sliding column 10 is slidably connected to the detection slot disk 1. The spring piece 9 is fixedly connected to the detection slot disk 1, and the top of each positioning cylinder 8 is fixedly connected to a center positioning column 12. The center point of the center positioning column 12 is coaxially arranged with the center point of the positioning cylinder 8, and multiple center positioning columns 12 are all slidingly connected to the detection slot disk 1; a positioning distance sensor 13 is fixedly installed on the top of the inner wall of the detection slot disk 1, and the lower surfaces of the electrochemical sensor 2, metal oxide semiconductor sensor 3, carbon dioxide infrared sensor 4, PID sensor 5, temperature and humidity sensor 6 and air pressure sensor 7 are all in the same horizontal plane. The outer wall of the sliding column 10 is a smooth surface, and the positioning distance sensor 13 is electrically connected to the wireless controller 33.

[0035] In this embodiment, if Figure 5As shown, a UWB positioning chip 14 is mounted on the top of the positioning distance sensor 13, and a GPS positioning module 15 is mounted on the top of the UWB positioning chip 14. Both the UWB positioning chip 14 and the GPS positioning module 15 are electrically connected to the wireless controller 33; this allows the UWB positioning chip 14 to perform indoor positioning at the fire scene, while the GPS positioning module 15 is used for outdoor positioning. A ridge 16 is fixedly connected to the outer wall of the sliding column 10, and the positioning cylinder 8 and the triangular guide block 11 are both fixedly connected to the ridge 16. The ridge 16 is slidably connected to the detection slot disk 1, so that the force applied to the sliding column 10 will also drive the ridge 16 toward the center point of the detection slot disk 1, so that the ridge 16 can guide the movement of the sliding column 10.

[0036] In this embodiment, if Figure 3 - Figure 7 As shown, an inclined push plate 17 is slidably connected to one side of one of the triangular guide blocks 11; a rotating column 18 is fixedly connected to one side of the inclined push plate 17, and a rotating bar 19 is fixedly connected to the top of the rotating column 18, and a stepping motor 20 is installed at one end of the rotating bar 19, and the stepping motor 20 is electrically connected to the wireless controller 33, and the output end of the stepping motor 20 is fixedly connected to the rotating bar 19; a supporting block 21 is fixedly connected to one side of the stepping motor 20, and the supporting block 21 is fixedly connected to the detection slot disk 1, a positioning slide bar 22 is provided on one side of the rotating column 18, and the positioning slide bar 22 is fixedly connected to the rotating bar 19, the positioning slide bar 22 is slidably connected to the detection slot disk 1, and a battery 23 is provided on one side of the positioning slide bar 22, and the battery 23 is fixedly connected to the detection slot disk 1.

[0037] The upper surface of the inclined push plate 17 is fixedly connected to a sleeve block 24, and the outer wall of the sleeve block 24 is fixedly connected to a bearing ring 25. The bearing ring 25 is rotatably connected to the detection slot disk 1. The upper and lower surfaces of the bearing ring 25 are rotatably connected to limit rings 26, and the two limit rings 26 are fixedly connected to the detection slot disk 1.

[0038] In this embodiment, if Figure 5 - Figure 8As shown, the positioning distance sensor 13 is externally provided with a plurality of limit rods 27, which are arranged in a circular pattern with equal spacing. Each of the limit rods 27 is slidably connected to the detection tray 1. A linkage bar 28 is mounted on the upper surface of the limit rods 27, and each of the limit rods 27 is fixedly connected to the linkage bar 28. A pressure sensor 29 is fixedly mounted on the upper surface of the linkage bar 28. An electric cylinder 30 is mounted on the upper surface of the pressure sensor 29. The electric cylinder 30 is fixedly connected to the detection tray 1. The sensing end of the pressure sensor 29 is fixedly connected to the output end of the electric cylinder 30. Both the pressure sensor 29 and the electric cylinder 30 are electrically connected to a wireless controller 33. The inner wall of the positioning cylinder 8 is provided with a plurality of positioning holes 31, which are arranged in a circular pattern with equal spacing. The outer wall of the limit rods 27 is smooth, and the inner wall of the positioning holes 31 is smooth.

[0039] In this embodiment, if Figure 2 - Figure 6 As shown, a bracket 32 ​​is fixedly connected to the lower surface of the detection slot tray 1 and near the position of the air pressure sensor 7; the wireless controller 33 is fixed on the outer wall of the bracket 32 ​​so that it can be held on the bracket 32 ​​by hand. The bracket 32 ​​supports the detection slot tray 1, and the detection slot tray 1 is located in the detection area.

[0040] The working principle of the fire scene gas detection device based on the multimodal sensor array of the present invention is as follows:

[0041] During step 1, inspection and positioning, the inspector enters the fire investigation site and holds the bracket 32, which supports the inspection tray 1, with the inspection tray 1 positioned within the inspection area. Battery 23 powers the UWB positioning chip 14 and the GPS positioning module 15. The UWB positioning chip 14 performs indoor positioning at the fire investigation site, while the GPS positioning module 15 performs outdoor positioning. Once the UWB positioning chip 14 locates the coordinates of the inspection points on the inspection tray 1, precise inspections can begin in rotation.

[0042] Step 2: During the alternating drive, the detection slot disc 1 supports the support block 21, which supports the stepper motor 20. The stepper motor 20 drives the rotating bar 19 to rotate, which in turn drives the positioning slide 22 to rotate. The positioning slide 22 rotates inside the detection slot disc 1. Simultaneously, the rotating bar 19 drives the rotating column 18 to rotate, which in turn drives the sleeve 24 to rotate, which in turn drives the bearing ring 25 to rotate, which rotates on the outer wall of the detection slot disc 1. Simultaneously, the bearing ring 25 rotates along the two limiting rings 26, and the rotating column 18 drives the inclined push plate 17 to rotate, which squeezes the triangular guide block 11. Since the inclined surface of the inclined push plate 17 squeezes the inclined surface of the triangular guide block 11, the triangular guide block 11 is forced to drive the slide column 10 toward the center point of the detection slot disc 1.

[0043] Step 3: When the array takes turns positioning and detecting, since the lower surfaces of the electrochemical sensor 2, metal oxide semiconductor sensor 3, carbon dioxide infrared sensor 4, PID sensor 5, temperature and humidity sensor 6, and air pressure sensor 7 are all on the same horizontal plane, the vertical height position coordinates of the UWB positioning chip 14 can be compensated. The compensated vertical height position is the height value of the superposition of the electrochemical sensor 2, the positioning cylinder 8, and the positioning distance sensor 13. Then, after the sliding column 10 is subjected to force, it will also drive the protrusion 16 to approach the center point of the detection slot disk 1, and the sliding column 10 will drive the positioning cylinder 8 to approach the center point of the detection slot disk 1, and the positioning cylinder 8 will drive the two springs 9 to undergo elastic deformation. At the same time, the positioning cylinder 8 drives the electrochemical sensor 2 to approach the center point of the detection slot disk 1, and the positioning cylinder 8 drives the center positioning column 12 to approach the center point of the detection slot disk 1. When the positioning distance sensor 13 senses the distance to the center positioning column 12, and the sensed distance value is the same as the distance set by the wireless controller 33, the center point of the positioning distance sensor 13 is aligned with the center point of the center positioning column 12. In this way, the electrochemical sensor 2 is precisely located at the positioning coordinate position of the UWB positioning chip 14, and the electrochemical sensor 2 can be immediately turned on by the wireless controller 33, so that the electrochemical sensor 2 can detect carbon monoxide gas.

[0044] After the inclined push plate 17 separates from the first triangular guide block 11, the positioning cylinder 8 continues to reset under the action of the rebound force of the two spring pieces 9. When the electrochemical sensor 2 is no longer located at the positioning position of the UWB positioning chip 14, the inclined push plate 17 continues to rotate to contact the second triangular guide block 11, so that the second triangular guide block 11 drives the second sliding column 10 to approach the center point of the detection slot disk 1, and the second positioning cylinder 8 drives the metal oxide semiconductor sensor 3 to be located at the center position of the UWB positioning chip 14, thereby turning on the metal oxide semiconductor sensor 3 to detect volatile organic compound gas.

[0045] The tilted push plate 17 continues to rotate and press against the third triangular guide block 11. The third triangular guide block 11 drives the third slide 10 toward the center of the detection slot disk 1. The third positioning cylinder 8 drives the carbon dioxide infrared sensor 4 to the center of the UWB positioning chip 14. Turning on the carbon dioxide infrared sensor 4 allows carbon dioxide detection. The tilted push plate 17 continues to rotate and press against the fourth triangular guide block 11. The fourth triangular guide block 11 drives the fourth slide 10 toward the center of the detection slot disk 1. The fourth positioning cylinder 8 drives the PID sensor 5 to the center of the UWB positioning chip 14. Turning on the PID sensor 5 allows combustible gas detection. The tilted push plate 17 continues to rotate and press against the fifth triangular guide block 11. The fifth triangular guide block 11 drives the fifth slide 10 toward the center of the detection slot disk 1. The fifth positioning cylinder 8 drives the temperature and humidity sensor 6 to the center of the UWB positioning chip 14. Turning on the temperature and humidity sensor 6 allows temperature and humidity detection at this location. The tilted push plate 17 continues to rotate and press against the sixth triangular guide block 11. The sixth triangular guide block 11 drives the sixth slide column 10 toward the center of the detection slot 1. The sixth positioning cylinder 8 drives the air pressure sensor 7 to the center of the UWB positioning chip 14. Turning on the air pressure sensor 7 allows the air pressure to be detected. In this way, the electrochemical sensor 2, metal oxide semiconductor sensor 3, carbon dioxide infrared sensor 4, PID sensor 5, temperature and humidity sensor 6, and air pressure sensor 7 are all positioned according to the precise positioning coordinates of the UWB positioning chip 14, allowing the multi-modal array to perform precise detection in turn, greatly improving the accuracy of the multi-modal array detection of gas at the fire scene.

[0046] Step 4. During the locking and continuous detection, when it is necessary to perform fixed position detection on one of the electrochemical sensor 2, metal oxide semiconductor sensor 3, carbon dioxide infrared sensor 4, PID sensor 5, temperature and humidity sensor 6, and air pressure sensor 7, the electrochemical sensor 2 is selected. When the electrochemical sensor 2 is precisely located at the detection point coordinates specified by the UWB positioning chip 14, the stepper motor 20 is turned off through the wireless controller 33. The multiple positioning holes 31 above the electrochemical sensor 2 are aligned one by one with the multiple limit rods 27, so that the electric cylinder 30 is immediately started by the wireless controller 33, the electric cylinder 30 pushes the pressure sensor 29 to move downward, the pressure sensor 29 pushes the linkage bar 28 to move downward, the linkage bar 28 drives the multiple limit rods 27 to move downward, and the multiple limit rods 27 are respectively inserted into the multiple positioning holes 31. When the pressure value sensed by the pressure sensor 29 is the same as the pressure value set by the wireless controller 33, the electric cylinder 30 is turned off by the wireless controller 33, and the positioning cylinder 8 can be fixed and limited. In this way, the electrochemical sensor 2 can be continuously used. Among the other sensors: the metal oxide semiconductor sensor 3, the carbon dioxide infrared sensor 4, the PID sensor 5, the temperature and humidity sensor 6, and the air pressure sensor 7 can also be continuously positioned at the specified position for detection according to this method, thereby achieving two modes for gas detection at the fire detection site.

[0047] The contents not described in detail in the specification belong to the existing technology known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited, and conventional equipment can be used. In this technical solution, the electrical control components not mentioned are not shown in the figure because they belong to the existing technology and are not described here.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A fire scene gas detection device based on a multimodal sensor array, comprising a detection tray and a wireless controller, characterized by: An electrochemical sensor is provided below the detection tank plate, and a gas detection component is installed on one side of the electrochemical sensor; The gas detection assembly includes multiple sensors installed on one side of the electrochemical sensor for detecting different gases; the inner wall of the detection slot disk is slidably connected to multiple positioning cylinders, the outer wall of each positioning cylinder is fixedly connected to two spring pieces, a sliding column is provided between the two spring pieces, one end of each sliding column is fixedly connected to a triangular guide block, and an inclined push plate is slidably connected to one side of one of the triangular guide blocks; one side of the inclined push plate is fixedly connected to a rotating column, and the top of the rotating column is fixedly connected to a rotating bar, one end of the rotating bar is installed with a stepper motor, the stepper motor is electrically connected to the wireless controller, and the output end of the stepper motor is fixedly connected to the rotating bar; one side of the stepper motor is fixedly connected to a support block, and the support block is fixedly connected to the detection slot disk, multiple sensors include those installed on the electrochemical sensor A metal oxide semiconductor sensor is provided on one side of the sensor, and a carbon dioxide infrared sensor is provided on one side of the metal oxide semiconductor sensor, a PID sensor is provided on one side of the carbon dioxide infrared sensor, a temperature and humidity sensor is installed on one side of the PID sensor, and an air pressure sensor is provided on one side of the temperature and humidity sensor; a plurality of positioning cylinders are fixedly connected to the electrochemical sensor, the metal oxide semiconductor sensor, the carbon dioxide infrared sensor, the PID sensor, the temperature and humidity sensor and the air pressure sensor respectively, and the plurality of positioning cylinders are arranged in a circular ring with equal distances, and the electrochemical sensor, the metal oxide semiconductor sensor, the carbon dioxide infrared sensor, the PID sensor, the temperature and humidity sensor and the air pressure sensor are all electrically connected to the wireless controller The sliding column is fixedly connected to the positioning cylinder, and the sliding column is slidably connected to the detection slot disk, the spring piece is fixedly connected to the detection slot disk, the top of each positioning cylinder is fixedly connected to the center positioning column, the center point of the center positioning column is coaxial with the center point of the positioning cylinder, and multiple center positioning columns are slidably connected to the detection slot disk; a positioning distance sensor is fixedly installed on the top of the inner wall of the detection slot disk, and the positioning distance sensor is electrically connected to the wireless controller. The lower surfaces of the electrochemical sensor, metal oxide semiconductor sensor, carbon dioxide infrared sensor, PID sensor, temperature and humidity sensor and air pressure sensor are all in the same horizontal plane; the outer wall of the sliding column is smooth, and the top of the positioning distance sensor is installed with a UWB positioning chip. A GPS positioning module is installed on the top of the UWB positioning chip, and the UWB positioning chip and the GPS positioning module are electrically connected to the wireless controller; the outer wall of the sliding column is fixedly connected with a convex strip, the positioning cylinder and the triangular guide block are fixedly connected to the convex strip, the convex strip is slidingly connected to the detection slot disk, a positioning slide bar is provided on one side of the rotating column, and the positioning slide bar is fixedly connected to the rotating bar, the positioning slide bar is slidingly connected to the detection slot disk, a battery is provided on one side of the positioning slide bar, and the battery is fixedly connected to the detection slot disk, the upper surface of the inclined push plate is fixedly connected with a sleeve block, and the outer side wall of the sleeve block is fixedly connected with a bearing ring, the bearing ring is rotatably connected to the detection slot disk, the upper surface and lower surfaces of the bearing ring are rotatably connected to limit rings, and the two limit rings are fixedly connected to the detection slot disk.

2. The fire scene gas detection device based on a multimodal sensor array according to claim 1 is characterized in that: The positioning distance sensor is provided with a plurality of limit rods on the outside, and the plurality of limit rods are arranged in a circular ring with equal distances; The plurality of limit rods are all slidably connected to the detection slot disk, a linkage bar is installed on the upper surface of the limit rod, and the plurality of limit rods are all fixedly connected to the linkage bar, a pressure sensor is fixedly installed on the upper surface of the linkage bar, an electric cylinder is installed on the upper surface of the pressure sensor, the electric cylinder is fixedly connected to the detection slot disk, the sensing end of the pressure sensor is fixedly connected to the output end of the electric cylinder, and the pressure sensor and the electric cylinder are both electrically connected to the wireless controller; The inner wall of the positioning cylinder is provided with a plurality of positioning holes, and the plurality of positioning holes are arranged in a circular ring with equal spacing.

3. The fire scene gas detection device based on a multimodal sensor array according to claim 2, characterized in that: The outer wall of the limiting rod is a smooth surface, and the inner wall of the positioning hole is a smooth surface.

4. The fire scene gas detection device based on a multimodal sensor array according to claim 3 is characterized in that: A bracket is fixedly connected to the lower surface of the detection tank plate near the position of the air pressure sensor; The wireless controller is fixed on the outer wall of the bracket.

5. A method for detecting gas at a fire scene based on a multimodal sensor array, using the fire scene gas detection device based on a multimodal sensor array according to claim 4, characterized in that: The method comprises the following steps: Step 1: Detection and positioning: Hold the bracket with your hand, the bracket supports the detection slot, and the UWB positioning chip coordinates the detection point of the detection slot; Step 2: Drive in turn, the stepper motor drives the rotating bar to rotate, the inclined surface of the inclined push plate squeezes the inclined surface of the triangular guide block, and the sliding column approaches the center point of the detection groove disk; Step 3: The array takes turns to locate and detect. The electrochemical sensor, metal oxide semiconductor sensor, carbon dioxide infrared sensor, PID sensor, temperature and humidity sensor, and air pressure sensor are positioned at the designated coordinates for detection in turn. Step 4: Lock and continue testing. When the electrochemical sensor is located at the detection point coordinates specified by the UWB positioning chip, multiple limit rods are inserted into multiple positioning holes respectively, and the electrochemical sensor is continuously used for on-site fire detection.

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