A fire warning device based on directional reflection of thermal radiation

Abstract

The present invention relates to the technical field of fire warning, and in particular to a fire warning device based on directional reflection of thermal radiation, comprising a mounting seat, an infrared sensor assembly, a main reflector and a housing; the fire warning device also comprises a turntable, an annular angle measuring component and an angle measuring head, wherein the turntable is rotatably mounted below the mounting seat, the infrared sensor assembly is vertically mounted in the middle of the lower end surface of the turntable, the main reflector is mounted on the lower end surface of the turntable, the main reflector is arc-shaped, the infrared sensor assembly is located at the focus of the main reflector, the housing is mounted on the lower end surface of the turntable, the housing covers the infrared sensor assembly and the main reflector, the annular angle measuring component is mounted on the mounting seat, the annular angle measuring component is concentrically arranged with the rotating axis of the turntable, the angle measuring head is mounted on the turntable, and the angle measuring head and the annular angle measuring component cooperate to detect the relative angle between the turntable and the mounting seat; the fire warning device can determine the relative angle between the heat source of a fire and the device, has a large detection range, and multiple devices can cooperate to accurately locate the heat source of a fire, thereby having good practicality.

Description

Technical Field

[0001] The present invention relates to the technical field of fire early warning, and in particular to a fire early warning device based on directional reflection of thermal radiation. Background Art

[0002] In a fire monitoring area, multiple fire warning devices are usually deployed. Fire warning devices detect and warn of fires, and cooperate with fire extinguishing systems to extinguish fires. The prior art discloses a variety of fire warning devices and methods based on directional reflection of thermal radiation. For example, Chinese invention patent application publication number CN115762042A proposes a flame detection method and flame detector for infrared sensors. The flame detector discloses a flame detector comprising an acquisition unit, a storage unit, and a processing unit. The acquisition unit is configured to acquire output signals from each detection channel, wherein the acquisition unit includes an infrared sensor, and the storage unit is coupled to the acquisition unit and configured to store the output signals acquired by the acquisition unit. The processing unit is coupled to the acquisition unit and the storage unit and configured to execute the following flame detection method, including:

[0003] S11: Collect the output signals of the infrared sensors of the 4.5um detection channel, 5.3um detection channel, 3.8um detection channel and 0.3-10.6um wide-spectrum detection channel respectively; S12: Determine whether the output signal meets the preset conditions; S13: When it is determined that the output signal meets the preset conditions, determine the ratio of the energy sum of the 4.5um detection channel to the energy sum of the 5.3um detection channel or the 3.8um detection channel in a preset time window; and S14: Determine whether there is a flame based on the relationship between the ratio and the threshold value.

[0004] The above-mentioned fire warning device has multiple detection channels, but it does not explain the specific structure. The traditional directional reflection fire warning device uses a fixed reflector and infrared sensor, which is highly sensitive to fire thermal radiation within a set angle range, but the detection range is narrow and the fire area cannot be accurately located within the detection range. Summary of the Invention

[0005] In order to solve the above technical problems, the present invention provides a fire warning device based on directional reflection of thermal radiation, which can determine the relative angle between the fire heat source and the device, has a large detection range, and multiple devices can coordinately and accurately locate the fire heat source, and has good practicality.

[0006] The fire warning device based on directional reflection of thermal radiation of the present invention comprises a mounting base, an infrared sensor assembly, a main reflector and a housing; further comprises a turntable, an annular angle measuring component and an angle measuring head; the turntable is rotatably mounted below the mounting base, a driving component is provided between the turntable and the mounting base to rotate the turntable, the infrared sensor assembly is vertically mounted in the middle of the lower end surface of the turntable, the main reflector is mounted on the lower end surface of the turntable, the main reflector is arc-shaped, the infrared sensor assembly is located at the focus of the main reflector, the housing is mounted on the lower end surface of the turntable, the housing covers the infrared sensor assembly and the main reflector, the annular angle measuring component is mounted on the mounting base, the annular angle measuring component is connected to the turntable The rotating shaft is arranged concentrically, and the goniometer head is installed on the turntable. The goniometer head and the annular goniometer component cooperate to detect the relative angle between the turntable and the mounting seat; a mounting seat and a control unit of a drive component and a communication unit are set inside the turntable to enable the infrared sensor assembly to detect thermal radiation and generate a corresponding electrical signal according to the thermal radiation value. Multiple mounting seats are installed in the fire monitoring area to form a fire monitoring and early warning network. Communication connections are made between multiple turntables or between multiple turntables and the superior control center. The above are all existing technologies and will not be repeated here; the mounting seat is installed upright or inverted as needed, with the inner arc surface of the main reflector facing the monitoring area, and multiple main reflectors are respectively facing To different angles to cover the fire monitoring area. When an abnormality occurs in the fire monitoring area, infrared thermal radiation of a specific wavelength will be generated. The thermal radiation generated in the abnormal area decreases with increasing distance. The main reflector will gather the thermal radiation reaching the turntable and reflect it to the infrared sensor assembly, so that the thermal radiation received by the infrared sensor assembly is enhanced, thereby improving the sensitivity of detection and warning. The infrared sensor assembly generates a corresponding electrical signal. At this time, the driving component drives the turntable to rotate and adjust the angle of the main reflector. When the inner arc surface of the main reflector is facing the heat source in the abnormal area, the electrical signal generated by the infrared sensor assembly is the strongest, the turntable stops, and the annular angle measuring component and the angle measuring head The angle of the turntable is determined in cooperation, and then the relative angle between the heat source and the turntable is determined. The multiple turntables communicate through the communication unit, and the remaining multiple turntables start to rotate so that the inner arc surfaces of the remaining multiple main reflectors are all facing the heat source. The remaining multiple annular angle measuring components and multiple angle measuring heads cooperate to determine the angles of the remaining multiple turntables. The focus of the extension line of the remaining multiple main reflectors in the facing direction is the heat source position. Therefore, the specific position of the heat source in the abnormal area is determined by the cooperation of at least two early warning devices, forming a distributed collaborative positioning fire monitoring and early warning system based on fire early warning devices of directional reflection of thermal radiation, which improves the fire early warning accuracy and increases the monitoring range.

[0007] Preferably, the infrared sensor assembly includes a mounting post and multiple infrared sensors, the mounting post is vertically installed in the middle of the turntable, and multiple infrared sensor matrices are installed on the side wall of the mounting post facing the main reflector; multiple infrared sensors form a matrix, and since there is a height difference between the early warning device and the heat source in the abnormal area, the thermal radiation reflected by the main reflector will be focused on different infrared sensors. Marking and determining the position of the infrared sensor where the thermal radiation is concentrated can determine the pitch angle between the heat source in the abnormal area and the early warning device, which is conducive to improving the detection accuracy and determining the position of the heat source.

[0008] Preferably, it also includes an arc frame, a sub-reflecting mirror 1, a sub-reflecting mirror 2 and a telescopic mechanism, the arc frame is installed on the turntable, the main reflector is fixedly installed in the middle of the arc frame, the sub-reflecting mirror 1 is slidably installed on the left side of the arc frame, the sub-reflecting mirror 2 is slidably installed on the right side of the arc frame, the sub-reflecting mirror 1 and the sub-reflecting mirror 2 are arranged opposite to each other, the telescopic mechanism is installed on the arc frame, and the telescopic mechanism drives the sub-reflecting mirror 1 and the sub-reflecting mirror 2 to synchronously retract toward the middle of the arc frame or extend to both sides of the arc frame; during normal monitoring and early warning, the telescopic mechanism drives the sub-reflecting mirror 1 and the sub-reflecting mirror 2 to retract The telescopic mechanism is retracted in the middle of the arc frame, and the sub-reflector 1 and the sub-reflector 2 are located behind the main reflector. At this time, the main reflector reflects thermal radiation to the infrared sensor assembly, and the monitoring angle is large. When an electrical signal of a heat source in an abnormal area is generated on the infrared sensor assembly, the telescopic mechanism drives the sub-reflector 1 and the sub-reflector 2 to slide out to the left and right sides of the arc frame respectively, so that the sub-reflector 1, the main reflector and the sub-reflector 2 form a large-area reflective group mirror. At this time, the large-area reflective group mirror reflects thermal radiation to the infrared sensor assembly, thereby improving the sensitivity and accuracy of detection and early warning.

[0009] Preferably, the telescopic mechanism includes an arc-shaped rack 1, an arc-shaped rack 2, a vertical shaft 1, a driver, a gear 1, a gear 2, a vertical shaft 2, a gear 3 and a gear 4. The arc-shaped rack 1 is mounted on the secondary reflector 1, the arc-shaped rack 2 is mounted on the secondary reflector 2, the vertical shaft 1 is rotatably mounted on the left side of the middle part of the arc frame, the driver is mounted on the arc frame, the output shaft of the driver is connected to the vertical shaft 1, the gear 1 and the gear 2 are concentrically mounted on the vertical shaft 1, the gear 2 is meshed with the arc-shaped rack 1, the vertical shaft 2 is rotatably mounted on the right side of the middle part of the arc frame, the gear 3 and the gear 4 are concentrically mounted on the vertical shaft On the second, gear three is engaged with gear one, and gear four is engaged with arc rack two; the driver drives vertical shaft one to rotate, vertical shaft one drives gear one and gear two to rotate, gear two is engaged to drive arc rack one to move along the arc frame, thereby driving sub-reflector one to move along the arc frame, and at the same time, gear one is engaged to drive gear three to rotate in the opposite direction, gear three drives vertical shaft two to rotate, vertical shaft two drives gear four to rotate, gear four is engaged to drive arc rack two to move along the arc frame, thereby driving sub-reflector two to move along the arc frame, so that sub-reflector one and sub-reflector two move relatively synchronously.

[0010] Preferably, it also includes an arcuate window frame and multiple narrow-band optical filters. A window is provided on the outer shell, and the window is arranged opposite to the main reflector. The arcuate window frame is installed on the window of the outer shell, and multiple narrow-band optical filters are installed on the arcuate window frame; the multiple narrow-band optical filters only allow infrared light of specific wavelengths to pass through, forming a dual-band infrared detection and warning device, a three-band infrared detection and warning device, or a special fire warning device for electric vehicles.

[0011] Preferably, a plurality of vibration sensors are further included, and a plurality of vibration sensors are arranged between the curved window frame and the outer shell; when an explosion occurs in the monitoring area, a shock wave is generated, and the shock wave causes the curved window frame to vibrate. The vibration sensor detects the above vibration and generates an electrical signal, thereby detecting the explosion and issuing a fire warning.

[0012] Preferably, it also includes a water spray pipe, which is installed on the turntable, and the output end of the water spray pipe is in the same direction as the main reflector; the input end of the water spray pipe is connected to an external fire water system. After the fire is confirmed, since multiple turntables form an early warning network, the fire water system is operated to transport fire water to the water spray pipe closest to the fire source, and spray fire water to the fire source through the water spray pipe to extinguish the fire, thereby improving the fire extinguishing efficiency.

[0013] Preferably, it also includes a foam nozzle, a storage box 1 and a storage box 2, the foam nozzle is installed on the turntable, a mixing chamber is provided inside the foam nozzle, a nozzle connected to the mixing chamber is provided at one end of the foam nozzle, the mixing chamber gradually shrinks toward the nozzle, the output end of the water spray pipe is passed through the center of the mixing chamber of the foam nozzle, the output end of the water spray pipe is located inside the nozzle of the foam nozzle, the storage box 1 and the storage box 2 are installed on the turntable, the storage chamber 1 is provided inside the storage box 1, the storage box 1 is connected to the mixing chamber of the foam nozzle through the pipe 1, and the storage box 2 is connected to the mixing chamber of the foam nozzle through the pipe 2. The mixing chambers are connected; component A of the foam fire extinguishing agent is stored in storage chamber 1 of storage box 1, and component B of the foam fire extinguishing agent is stored in storage chamber 2 of storage box 2. When foam fire extinguishing is required, the solenoid valves of pipeline 1 and pipeline 2 are opened, so that component A and component B are input into the mixing chamber of the foam nozzle for reaction. The reaction produces a large amount of carbon dioxide and forms foam, and the volume expands several times, so that the foam is ejected through the nozzle of the foam nozzle to extinguish the fire; while spraying foam, the water spray pipe can also spray water mist, so that the water mist and foam are mixed, thereby improving the fire extinguishing effect.

[0014] Preferably, it also includes multiple blades, a motor and a transmission assembly. The water spray pipe is rotatably connected to the foam nozzle. Multiple blades are evenly installed on the circumference of the outer wall of the water spray pipe. The multiple blades are located inside the mixing chamber of the foam nozzle. The motor is installed on the foam nozzle through a bracket, and the output shaft of the motor is connected to the water spray pipe through the transmission assembly. The input end of the water spray pipe is connected to the fire water system through a rotary joint, and the motor drives the water spray pipe to rotate through the transmission assembly. The water spray pipe drives the multiple blades to rotate, so that the multiple blades stir and fully mix component A and component B, make the reaction more complete, and accelerate the output of the foam formed in the mixing chamber of the foam nozzle, thereby improving the foam spraying effect.

[0015] Preferably, it also includes a photoelectric converter interface and an optical fiber. The photoelectric converter interface is installed on the turntable, and the optical fiber plug-in hole is set on the photoelectric converter interface. The connector of the optical fiber is plugged into the optical fiber plug-in hole of the photoelectric converter interface; the photoelectric converter interface is electrically connected to the communication module in the turntable, and multiple optical fibers are respectively plugged into and connected to multiple photoelectric converter interfaces on multiple turntables, so that multiple turntables can be networked through optical fiber communication.

[0016] Compared with the prior art, the present invention has the following advantages: the main reflector concentrates heat radiation reaching the turntable and reflects it toward the infrared sensor assembly, thereby enhancing the heat radiation received by the infrared sensor assembly and improving the sensitivity of detection and warning. The infrared sensor assembly generates a corresponding electrical signal. At this time, a driving component drives the turntable to rotate, adjusting the angle of the main reflector. When the inner curved surface of the main reflector faces the heat source in the abnormal area, the electrical signal generated by the infrared sensor assembly is the strongest. The turntable stops, and the annular angle measuring component and the goniometer cooperate to determine the angle of the turntable, thereby determining the relative angle between the heat source and the turntable. The multiple turntables communicate via a communication unit, and the remaining turntables begin to rotate so that the inner curved surfaces of the remaining main reflectors all face the heat source. The remaining annular angle measuring components and the goniometer cooperate to determine the angles of the remaining turntables. The focal point of the extension of the direction facing the remaining main reflectors is the location of the heat source. Thus, the specific location of the heat source in the abnormal area is determined by the cooperation of at least two warning devices, forming a distributed, collaboratively positioned fire monitoring and warning system based on directional reflection of thermal radiation fire warning devices, improving fire warning accuracy and extending the monitoring range. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention;

[0018] Figure 2 It is a front cross-sectional schematic diagram of the present invention;

[0019] Figure 3 It is an axonometric structural diagram of the present invention;

[0020] Figure 4It is a structural schematic diagram of the foam nozzle, storage box 1 and storage box 2 of the present invention;

[0021] Figure 5 This is a schematic diagram of the structure of the present invention through the optical-to-electrical converter interface and optical fiber networking;

[0022] Figure 6 It is a structural diagram of the installation column and infrared sensor and other structures;

[0023] Figure 7 It is a structural diagram of the mounting base, the primary reflector, the turntable, the secondary reflector 2, the arc-shaped rack 2 and the vertical axis 1;

[0024] Figure 8 It is a bottom view schematic diagram of the present invention;

[0025] Figure 9 It is a structural diagram of a main reflector, an arc frame, a secondary reflector 1, a secondary reflector 2, an arc rack 1, an arc rack 2 and a telescopic mechanism;

[0026] Figure 10 It is a schematic diagram of the structure of the housing, curved window frame, narrow-band optical filter and vibration sensor;

[0027] Figure 11 It is a schematic diagram of the structure of the water spray pipe, foam spray pipe, storage tank 1 and storage tank 2;

[0028] Figure 12 It is a structural diagram of structures such as a water spray pipe, a foam spray pipe, a storage box 1, a storage box 2, blades, a motor and a transmission component.

[0029] Markings in the accompanying drawings: 1. Mounting base; 2. Infrared sensor assembly; 3. Main reflector; 4. Housing; 5. Turntable; 6. Annular angle measuring component; 7. Angle measuring head; 8. Mounting column; 9. Infrared sensor; 10. Arc frame; 11. Secondary reflector 1; 12. Secondary reflector 2; 13. Arc rack 1; 14. Arc rack 2; 15. Vertical axis 1; 16. Driver; 17. Gear 1; 18. Gear 2; 19. Vertical axis 2; 20. Gear 3; 21. Gear 4; 22. Arc window frame; 23. Narrow-band optical filter; 24. Vibration sensor; 25. Water spray pipe; 26. Foam spray pipe; 27. Storage box 1; 28. Storage box 2; 29. ​​Blade; 30. Motor; 31. Transmission assembly; 32. Photoelectric converter interface; 33. Optical fiber. DETAILED DESCRIPTION

[0030] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the accompanying drawings. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0031] Example 1, as Figures 1 to 6 and Figure 10 As shown, a fire warning device based on directional reflection of thermal radiation includes a mounting base 1, an infrared sensor assembly 2, a main reflector 3 and a housing 4; it also includes a turntable 5, an annular angle measuring component 6 and an angle measuring head 7. The turntable 5 is rotatably mounted below the mounting base 1. A driving component is provided between the turntable 5 and the mounting base 1 to rotate the turntable 5. The infrared sensor assembly 2 is vertically mounted in the middle of the lower end surface of the turntable 5. The main reflector 3 is mounted on the lower end surface of the turntable 5. The main reflector 3 is arc-shaped. The infrared sensor assembly 2 is located at the focus of the main reflector 3. The housing 4 is mounted on the lower end surface of the turntable 5. The housing 4 covers the infrared sensor assembly 2 and the primary reflector 3. The annular angle measuring component 6 is mounted on the mounting base 1. The annular angle measuring component 6 is arranged concentrically with the rotation axis of the turntable 5. The angle measuring head 7 is mounted on the turntable 5. The angle measuring head 7 and the annular angle measuring component 6 cooperate to detect the relative angle between the turntable 5 and the mounting base 1. The infrared sensor assembly 2 includes a mounting post 8 and a plurality of infrared sensors 9. The mounting post 8 is vertically mounted in the middle of the turntable 5. The plurality of infrared sensors 9 are mounted in a matrix on the side wall of the mounting post 8 facing the primary reflector 3.

[0032] The turntable 5 is internally provided with a mounting base 1, a control unit for a drive component, and a communication unit, etc., so that the infrared sensor assembly 2 can detect thermal radiation and generate a corresponding electrical signal based on the thermal radiation value. Multiple mounting bases 1 are installed in a fire monitoring area to form a fire monitoring and early warning network. Multiple turntables 5 are connected to each other or to a higher-level control center. The annular angle measuring component 6 is an annular grating scale or a code disk, etc., and the angle measuring head 7 is a grating head or a Hall sensor, etc. The above are all prior art and will not be described in detail here.

[0033] The mounting base 1 can be installed upright or inverted as needed, with the inner arc surface of the main reflector 3 facing the monitoring area. Multiple main reflectors 3 are facing different angles to cover the fire monitoring area. When an abnormality occurs in the fire monitoring area, infrared thermal radiation of a specific wavelength will be generated. For example, the wavelength of high-temperature carbon dioxide in hydrocarbon flames is around 4.4 microns, high-temperature water vapor molecules are around 2.7 microns, and background thermal radiation and interference are around 3.8-4.1 microns; the thermal radiation generated in the abnormal area decreases with increasing distance, and the main reflector 3 will gather the thermal radiation reaching the turntable 5 and reflect it to the infrared sensor assembly 2, so that the thermal radiation received by the infrared sensor assembly 2 is enhanced, thereby improving the sensitivity of detection and warning, and the infrared sensor assembly 2 generates corresponding electrical signals. Multiple infrared sensors 9 form a matrix. Due to the height difference between the warning device and the heat source in the abnormal area, the thermal radiation reflected by the main reflector 3 will be focused on different infrared sensors 9, marking and determining the infrared sensors gathered by the thermal radiation. The position of the device 9 can determine the pitch angle between the heat source in the abnormal area and the warning device. At this time, the driving component drives the turntable 5 to rotate and adjust the angle of the main reflector 3. When the inner arc surface of the main reflector 3 faces the heat source in the abnormal area, the electric signal generated by the infrared sensor assembly 2 is the strongest, and the turntable 5 stops. The annular angle measuring component 6 and the angle measuring head 7 cooperate to determine the angle of the turntable 5, and then determine the relative angle between the heat source and the turntable 5. The multiple turntables 5 communicate through the communication unit, and the remaining multiple turntables 5 start to rotate so that the inner arc surfaces of the remaining multiple main reflectors 3 are all facing the heat source. The remaining multiple annular angle measuring components 6 and the multiple angle measuring heads 7 cooperate to determine the angles of the remaining multiple turntables 5. The focus of the extension line of the direction facing the remaining multiple main reflectors 3 is the heat source position, so that the specific position of the heat source in the abnormal area is determined by the cooperation of at least two warning devices, forming a distributed collaborative positioning fire monitoring and warning system of fire warning devices based on directional reflection of thermal radiation, which improves the fire warning accuracy and the monitoring range;

[0034] The device further includes a curved window frame 22 and a plurality of narrow-band optical filters 23. A window is provided on the housing 4, and the window is arranged opposite to the main reflector 3. The curved window frame 22 is mounted on the window of the housing 4, and the plurality of narrow-band optical filters 23 are mounted on the curved window frame 22. The device also includes a plurality of vibration sensors 24, and the plurality of vibration sensors 24 are disposed between the curved window frame 22 and the housing 4.

[0035] Multiple narrow-band optical filters 23 each allow only infrared light of a specific wavelength to pass through. For example, one narrow-band optical filter 23 allows infrared thermal radiation with a wavelength of 4.4 microns to pass through, and another narrow-band optical filter 23 allows infrared thermal radiation with a wavelength of 3.8-4.1 microns to pass through, forming a dual-band infrared detection and warning system; or infrared thermal radiation with a wavelength of 2.7 microns can be added to form a three-band infrared detection and warning system. Furthermore, a narrow-band optical filter 23 is provided to allow infrared thermal radiation with a specific wavelength of micrometer wavelength generated when the power battery burns to pass through. The specific wavelength value varies depending on the type of power battery, thereby enabling early warning of fires in electric vehicles. When a deflagration occurs in the monitored area, a shock wave is generated, which causes the curved window frame 22 to vibrate. The vibration sensor 24 detects the vibration and generates an electrical signal, thereby detecting the deflagration and providing a fire warning.

[0036] The optical fiber 33 is connected to the optical fiber jack of the optical fiber 33. The optical fiber 33 is connected to the optical fiber jack of the optical fiber 33. The optical fiber 33 is connected to the optical fiber jack of the optical fiber 32. The optical fiber 33 is connected to the optical fiber jack of the optical fiber 32. The optical fiber 33 is connected to the optical fiber jack of the optical fiber 32. The optical fiber 33 is connected to the optical fiber jack of the optical fiber 32.

[0037] Furthermore, in the prior art, the distributed fiber optic temperature sensing system DTS, Distributed Temperature Sensor is an optical instrument that uses optical fiber as a sensor for temperature perception. The system uses a single optical fiber to simultaneously realize temperature monitoring and signal transmission. It can detect tiny temperature changes and provide accurate and continuous temperature data in real time. It can realize real-time, fast multi-point measurement of spatial temperature distribution over a large range and long distance. The specific connection method of adding pulsed lasers, Raman WDM modules, dual-channel APD photoelectric converters and other hardware to the turntable 5 and the photoelectric converter interface 32 is the prior art and will not be elaborated. The optical fiber 33 is used to form a temperature detection network, thereby performing comprehensive temperature monitoring of the fire monitoring area.

[0038] Example 2, as Figures 7 to 9As shown, it also includes an arc frame 10, a secondary reflector 11, a secondary reflector 2 12 and a telescopic mechanism. The arc frame 10 is installed on the turntable 5, the main reflector 3 is fixedly installed in the middle of the arc frame 10, the secondary reflector 1 11 is slidably installed on the left side of the arc frame 10, and the secondary reflector 2 12 is slidably installed on the right side of the arc frame 10. The secondary reflector 1 11 and the secondary reflector 2 12 are arranged opposite to each other. The telescopic mechanism is installed on the arc frame 10, and the telescopic mechanism drives the secondary reflector 1 11 and the secondary reflector 2 12 to synchronously retract toward the middle of the arc frame 10 or extend to both sides of the arc frame 10; the telescopic mechanism includes an arc rack 13, an arc rack 2 14, a vertical shaft 15, a driver 16, a gear 17, a gear Wheel 2 18, vertical shaft 2 19, gear 3 20 and gear 4 21, arc rack 1 13 are installed on secondary reflector 1 1, arc rack 2 14 is installed on secondary reflector 2 12, vertical shaft 1 15 is rotatably installed on the middle left side of the arc frame 10, driver 16 is installed on the arc frame 10, the output shaft of driver 16 is transmission connected with vertical shaft 1 15, gear 1 17 and gear 2 18 are concentrically installed on vertical shaft 1 15, gear 2 18 is engaged with arc rack 1 13, vertical shaft 2 19 is rotatably installed on the middle right side of the arc frame 10, gear 3 20 and gear 4 21 are concentrically installed on vertical shaft 2 19, gear 3 20 is engaged with gear 1 17, gear 4 21 is engaged with arc rack 2 14.

[0039] The driver 16 drives the vertical shaft 15 to rotate, and the vertical shaft 15 drives the gear 17 and the gear 2 18 to rotate. The gear 2 18 engages to drive the arc rack 13 to move along the arc frame 10, thereby driving the secondary reflector 11 to move along the arc frame 10. At the same time, the gear 17 engages to drive the gear 3 20 to rotate in the opposite direction. The gear 3 20 drives the vertical shaft 2 19 to rotate. The vertical shaft 2 19 drives the gear 4 21 to rotate. The gear 4 21 engages to drive the arc rack 2 14 to move along the arc frame 10, thereby driving the secondary reflector 2 12 to move along the arc frame 10, so that the secondary reflector 11 and the secondary reflector 2 12 move relatively synchronously. During normal monitoring and early warning, The sub-reflector 1 11 and the sub-reflector 2 12 are retracted in the middle of the arc frame 10, and the sub-reflector 1 11 and the sub-reflector 2 12 are located on the rear side of the main reflector 3. At this time, the main reflector 3 reflects thermal radiation to the infrared sensor assembly 2, and the monitoring angle is large. When an electrical signal of a heat source in an abnormal area is generated on the infrared sensor assembly 2, the sub-reflector 1 11 and the sub-reflector 2 12 slide out to the left and right sides of the arc frame 10 respectively, so that the sub-reflector 1 11, the main reflector 3 and the sub-reflector 2 12 form a large-area reflective group mirror. At this time, the large-area reflective group mirror reflects thermal radiation to the infrared sensor assembly 2, thereby improving the sensitivity and accuracy of detection and early warning.

[0040] Example 3, as Figures 1 to 4 、 Figure 11 and Figure 12As shown, on the basis of Example 1, it further includes a water spray pipe 25, which is installed on the turntable 5, and the output end of the water spray pipe 25 is in the same direction as the main reflector 3; it also includes a foam nozzle 26, a storage box 1 27 and a storage box 2 28, the foam nozzle 26 is installed on the turntable 5, a mixing chamber is set inside the foam nozzle 26, one end of the foam nozzle 26 is set with a nozzle connected to the mixing chamber, the mixing chamber gradually shrinks toward the nozzle, the output end of the water spray pipe 25 is passed through the center of the mixing chamber of the foam nozzle 26, the output end of the water spray pipe 25 is located inside the nozzle of the foam nozzle 26, the storage box 1 27 and the storage box 2 28 It is installed on the turntable 5, and a storage chamber 1 is set inside the storage box 1 27. The storage box 1 27 is connected to the mixing chamber of the foam nozzle 26 through the pipe 1, and the storage box 2 28 is connected to the mixing chamber of the foam nozzle 26 through the pipe 2; it also includes multiple blades 29, a motor 30 and a transmission assembly 31. The water pipe 25 is rotatably connected to the foam nozzle 26. Multiple blades 29 are evenly installed on the circumference of the outer wall of the water pipe 25. The multiple blades 29 are located inside the mixing chamber of the foam nozzle 26. The motor 30 is installed on the foam nozzle 26 through a bracket, and the output shaft of the motor 30 is connected to the water pipe 25 through the transmission assembly 31.

[0041] The input end of the water spray pipe 25 is connected to the fire water system through a rotary joint. After the fire is confirmed, the multiple turntables 5 form an early warning network, and the fire water system is activated to transport fire water to the water spray pipe 25 closest to the fire source, and spray fire water to the fire source through the water spray pipe 25 to extinguish the fire; the storage chamber 1 of the storage tank 1 27 stores component A of the foam fire extinguishing agent, and the storage chamber 2 of the storage tank 2 28 stores component B of the foam fire extinguishing agent. When foam fire extinguishing is required, the solenoid valves of pipeline 1 and pipeline 2 are opened, so that component A and component B are input into the mixing chamber of the foam nozzle 26 The reaction produces a large amount of carbon dioxide and forms foam, which expands several times in volume. The motor 30 drives the water spray pipe 25 to rotate through the transmission component 31. The water spray pipe 25 drives the multiple blades 29 to rotate, so that the multiple blades 29 stir and fully mix the components A and B, making the reaction more complete, and accelerate the output of the foam formed in the mixing chamber of the foam nozzle 26, so that the foam is ejected through the nozzle of the foam nozzle 26 to extinguish the fire; while spraying the foam, the water spray pipe 25 can also spray water mist, so that the water mist and foam are mixed, thereby improving the fire extinguishing effect and improving the foam spraying effect.

[0042] like Figures 1 to 12As shown, a fire warning device based on directional reflection of thermal radiation of the present invention, when working, first, multiple mounting bases 1 are installed in the fire monitoring area, multiple photoelectric converter interfaces 32 are connected by multiple optical fibers 33 to form a fire monitoring and warning network, multiple turntables 5 are connected to each other or between multiple turntables 5 and the upper control center, and multiple main reflectors 3 are respectively oriented at different angles to cover the fire monitoring area. Then, when an abnormality occurs in the fire monitoring area, infrared thermal radiation of a specific wavelength is generated. The thermal radiation generated in the abnormal area decreases with increasing distance. The thermal radiation of the specific wavelength is filtered by multiple narrow-band optical filters 23 and irradiated onto the main reflector 3. The main reflector 3 focuses the thermal radiation and reflects it to multiple infrared sensors 9, so that the thermal radiation received by the multiple infrared sensors 9 is enhanced, thereby improving the sensitivity of detection and warning. The infrared sensor assembly 2 generates a corresponding electrical signal. At this time, the driving component drives the turntable 5 to rotate and adjusts the angle of the main reflector 3. When the inner arc surface of the main reflector 3 is facing the heat source in the abnormal area, the electrical signal generated by the infrared sensor assembly 2 is the strongest, the turntable 5 stops, and then the secondary reflector 11 and the secondary reflector 2 12 are respectively directed to the arc frame 1 0 slides out on the left and right sides, so that the secondary reflector 11, the main reflector 3 and the secondary reflector 2 12 form a large-area reflective mirror group. At this time, the large-area reflective mirror group reflects thermal radiation to the infrared sensor assembly 2, further improving the sensitivity and accuracy of detection and warning, marking and determining the position of the infrared sensor 9 where the thermal radiation is concentrated, determining the pitch angle between the heat source in the abnormal area and the warning device, the annular angle measuring component 6 and the angle measuring head 7 cooperate to determine the angle of the turntable 5, and then determine the relative angle between the heat source and the turntable 5, and the remaining multiple turntables 5 begin to rotate so that the inner arcs of the remaining multiple main reflectors 3 The surfaces are all facing the heat source, and the remaining multiple annular angle measuring components 6 and multiple angle measuring heads 7 cooperate to determine the angles of the remaining multiple turntables 5. The focus of the extension line of the remaining multiple main reflectors 3 in the facing direction is the heat source position, so that the specific position of the heat source in the abnormal area is determined by the cooperation of at least two early warning devices, forming a distributed collaborative positioning fire monitoring and early warning system based on fire early warning devices of directional reflection of thermal radiation, which improves the fire early warning accuracy and the monitoring range. Finally, when a fire is determined, fire water and foam are sprayed to the fire source through the water spray pipe 25 and the foam nozzle 26 to extinguish the fire.

[0043] The main functions achieved by the present invention are:

[0044] 1. It can determine the relative angle between the fire heat source and the device, with a large detection range, forming a distributed collaborative positioning fire monitoring and early warning system based on the directional reflection of thermal radiation. Multiple devices can accurately locate the fire heat source in a coordinated manner, which is highly practical.

[0045] 2. Able to detect the relative pitch angle between the fire heat source and the device;

[0046] 3. Able to spray fire water and foam, with good fire extinguishing effect;

[0047] 4. Use retractable reflector group to achieve large monitoring angle and high-precision conversion.

[0048] The fire warning device based on directional reflection of thermal radiation of the present invention has a common mechanical installation method, connection method or setting method, and any method that can achieve its beneficial effects can be implemented. The fire warning device based on directional reflection of thermal radiation of the present invention has a mounting base 1, an infrared sensor assembly 2, a main reflector 3, a housing 4, a turntable 5, an annular angle measuring component 6, an angle measuring head 7, a mounting column 8, an infrared sensor 9, a secondary reflector 11, a secondary reflector 2 12, an arcuate rack 13, an arcuate rack 2 14, a vertical axis 15, a driver 16, a gear 17, a gear 2 18, a vertical axis 2 19, a gear 3 20, a gear 4 21, a narrow-band optical filter 23, a vibration sensor 24, a water spray pipe 25, a foam spray pipe 26, a storage box 1 27, a storage box 2 28, a blade 29, a motor 30, a transmission assembly 31, a photoelectric converter interface 32, and an optical fiber 33. These are commercially available. Technicians in the industry only need to install and operate them according to the accompanying instruction manual, without the need for creative work by technicians in this field.

[0049] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A fire warning device based on directional reflection of thermal radiation, comprising a mounting base (1), an infrared sensor assembly (2), a main reflector (3) and a housing (4); characterized in that: The invention also includes a turntable (5), an annular angle measuring component (6) and an angle measuring head (7), wherein the turntable (5) is rotatably mounted below the mounting seat (1), a driving component is provided between the turntable (5) and the mounting seat (1) to rotate the turntable (5), an infrared sensor assembly (2) is vertically mounted in the middle of the lower end surface of the turntable (5), a main reflector (3) is mounted on the lower end surface of the turntable (5), the main reflector (3) is arc-shaped, the infrared sensor assembly (2) is located at the focus of the main reflector (3), a housing (4) is mounted on the lower end surface of the turntable (5), the housing (4) covers the infrared sensor assembly (2) and the main reflector (3), the annular angle measuring component (6) is mounted on the mounting seat (1), the annular angle measuring component (6) is concentrically arranged with the rotation axis of the turntable (5), the angle measuring head (7) is mounted on the turntable (5), and the angle measuring head (7) and the annular angle measuring component (6) cooperate to detect the relative angle between the turntable (5) and the mounting seat (1); The invention also includes an arc frame (10), a secondary reflector 1 (11), a secondary reflector 2 (12) and a telescopic mechanism, wherein the arc frame (10) is mounted on the turntable (5), the main reflector (3) is fixedly mounted in the middle of the arc frame (10), the secondary reflector 1 (11) is slidably mounted on the left side of the arc frame (10), and the secondary reflector 2 (12) is slidably mounted on the right side of the arc frame (10), the secondary reflector 1 (11) and the secondary reflector 2 (12) are arranged relative to each other, and the telescopic mechanism is mounted on the arc frame (10), and the telescopic mechanism drives the secondary reflector 1 (11) and the secondary reflector 2 (12) to synchronously retract toward the middle of the arc frame (10) or extend toward both sides of the arc frame (10).

2. A fire warning device based on directional reflection of thermal radiation according to claim 1, characterized in that: The infrared sensor assembly (2) comprises a mounting post (8) and a plurality of infrared sensors (9), wherein the mounting post (8) is vertically mounted in the middle of the turntable (5), and a matrix of the plurality of infrared sensors (9) is mounted on the side wall of the mounting post (8) facing the main reflector (3).

3. The fire warning device based on directional reflection of thermal radiation according to claim 1, characterized in that: The telescopic mechanism includes an arc rack 1 (13), an arc rack 2 (14), a vertical shaft 1 (15), a driver (16), a gear 1 (17), a gear 2 (18), a vertical shaft 2 (19), a gear 3 (20) and a gear 4 (21). The arc rack 1 (13) is mounted on the secondary reflector 1 (11), the arc rack 2 (14) is mounted on the secondary reflector 2 (12), the vertical shaft 1 (15) is rotatably mounted on the left side of the middle of the arc frame (10), and the driver (16) is mounted on the arc frame (1 0), the output shaft of the driver (16) is connected to the vertical shaft 1 (15), the gear 1 (17) and the gear 2 (18) are concentrically mounted on the vertical shaft 1 (15), the gear 2 (18) is meshed with the arc rack 1 (13), the vertical shaft 2 (19) is rotatably mounted on the right side of the middle part of the arc frame (10), the gear 3 (20) and the gear 4 (21) are concentrically mounted on the vertical shaft 2 (19), the gear 3 (20) is meshed with the gear 1 (17), and the gear 4 (21) is meshed with the arc rack 2 (14).

4. The fire warning device based on directional reflection of thermal radiation according to claim 1, characterized in that: It also includes an arcuate window frame (22) and a plurality of narrow-band optical filters (23). A window is provided on the housing (4), the window is arranged opposite to the main reflector (3), the arcuate window frame (22) is mounted on the window of the housing (4), and the plurality of narrow-band optical filters (23) are mounted on the arcuate window frame (22).

5. A fire warning device based on directional reflection of thermal radiation according to claim 4, characterized in that: It also includes a plurality of vibration sensors (24), which are arranged between the curved window frame (22) and the housing (4).

6. The fire warning device based on directional reflection of thermal radiation according to claim 1, characterized in that: It also includes a water spray pipe (25), which is installed on the turntable (5), and the output end of the water spray pipe (25) is oriented in the same direction as the main reflector (3).

7. A fire warning device based on directional reflection of thermal radiation according to claim 6, characterized in that: The invention also includes a foam nozzle (26), a storage box 1 (27) and a storage box 2 (28), wherein the foam nozzle (26) is installed on the turntable (5), a mixing chamber is provided inside the foam nozzle (26), a nozzle communicating with the mixing chamber is provided at one end of the foam nozzle (26), and the mixing chamber gradually shrinks toward the nozzle, an output end of the water spray pipe (25) is passed through the center of the mixing chamber of the foam nozzle (26), and the output end of the water spray pipe (25) is located inside the nozzle of the foam nozzle (26), the storage box 1 (27) and the storage box 2 (28) are installed on the turntable (5), a storage chamber 1 is provided inside the storage box 1 (27), the storage box 1 (27) is communicated with the mixing chamber of the foam nozzle (26) through the pipeline 1, and the storage box 2 (28) is communicated with the mixing chamber of the foam nozzle (26) through the pipeline 2.

8. The fire warning device based on directional reflection of thermal radiation according to claim 7, characterized in that: The invention also includes a plurality of blades (29), a motor (30) and a transmission assembly (31), wherein the water spray pipe (25) is rotatably connected to the foam spray pipe (26), a plurality of blades (29) are evenly installed on the circumference of the outer wall of the water spray pipe (25), and the plurality of blades (29) are located inside the mixing chamber of the foam spray pipe (26). The motor (30) is installed on the foam spray pipe (26) through a bracket, and the output shaft of the motor (30) is transmission-connected to the water spray pipe (25) through the transmission assembly (31).

9. The fire warning device based on directional reflection of thermal radiation according to claim 1, characterized in that: It also includes a photoelectric converter interface (32) and an optical fiber (33), the photoelectric converter interface (32) is installed on the turntable (5), the photoelectric converter interface (32) is provided with an optical fiber plug hole, and the connector of the optical fiber (33) is plugged into the optical fiber plug hole of the photoelectric converter interface (32).

Images