An intelligent security system

Abstract

The present invention discloses an intelligent security system, including a shell, a box body is provided inside the shell, an air duct is provided below the box body, the third bevel gear is connected to the transmission shaft, the transmission shaft passes through the air duct wall, and the other end of the transmission shaft is meshedly connected to the fourth bevel gear, the fourth bevel gear is meshedly connected to the third bevel gear, and the fifth bevel gear is driven by a negative pressure fan blade, and the negative pressure fan blade rotates to draw smoke into the air duct; a smoke flow rate detection unit is provided in the air duct, the smoke flow rate detection unit detects the flow rate of smoke drawn into the air duct, the control unit performs data processing on the smoke photo taken by the camera to obtain the smoke concentration, and the water spraying amount of the atomizing nozzle is set according to the smoke flow rate and the smoke concentration, the smoke is adsorbed and removed by the spray of the atomizing nozzle, and a collection bin is provided to collect the adsorbed smoke mixture; when a fire occurs, the thick smoke at the fire location can be eliminated, providing more escape time.

Description

Technical Field

[0001] The present invention belongs to the technical field of security, and in particular relates to an intelligent security system. Background Art

[0002] Fire alarms are devices required by national regulations to automatically detect or manually generate fire alarm signals in commercial, industrial, and entertainment venues. They communicate via circuits to display the location of the fire on a screen in the control room or duty station. Firefighting equipment is essential in daily life. Failure to adequately prepare for firefighting can lead to unimaginable dangers and losses. Most casualties from fires are caused by smoke inhalation, with asphyxiation accounting for one-half to two-thirds of all deaths. Even those who die from burns often suffocate due to smoke, rendering them unable to escape. Therefore, dispersing or removing smoke from fires is crucial for minimizing casualties.

[0003] Most of the current fire alarm systems are composed of regional fire alarm controllers and fire detectors. After the fire detector detects a fire, it transmits the fire data to the control center. The control center obtains the specific fire location, automatically sprinkles water to extinguish the fire through the fire control equipment, and sounds an alarm. For most residential buildings, the alarm systems currently used generally only provide dangerous alarms and cannot buy more critical escape time. After a fire occurs, a large amount of smoke is emitted, affecting the critical escape time. Therefore, a security system that can eliminate smoke is needed. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide an intelligent security system that can eliminate the thick smoke at the fire location when a fire occurs, provide more escape time, and solve the problems in the background technology.

[0005] The present invention provides the following technical solutions:

[0006] An intelligent security system includes a shell, a box body is provided inside the shell, a top plate is provided inside the box body, a paraffin layer is provided on one side of the top plate, and a rubber sleeve is wrapped around the outside of the paraffin layer. A push rod is connected to the other side of the top plate, and the other end of the push rod is rotatably connected to a first bevel gear. A photoelectric sensor is provided on the first bevel gear, and a first spring is provided on the push rod. One end of the first spring is connected to the push rod, and the other end is connected to the inner wall of the box body. A second bevel gear and a third bevel gear are provided on one side of the first bevel gear at intervals. The second bevel gear is connected to a motor. When driven by the motor, the first bevel gear can be meshed with the second bevel gear and the third bevel gear.

[0007] An air duct is provided below the box body. The bottom surface of the third bevel gear is connected to a transmission shaft, which penetrates the wall of the air duct. The other end of the transmission shaft is meshedly connected to a fourth bevel gear, which is meshedly connected to a fifth bevel gear. The fifth bevel gear is driven by a negative pressure fan blade, which rotates to draw smoke into the air duct.

[0008] A smoke flow rate detection unit is installed in the air duct to detect the flow rate of smoke drawn into the air duct. The control unit processes the smoke photos taken by the camera to obtain the smoke concentration. The water spray volume of the atomizing nozzle is set based on the smoke flow rate and smoke concentration. The smoke is adsorbed and removed through the spray of the atomizing nozzle, and a collection bin is set to collect the adsorbed smoke mixture.

[0009] The negative pressure fan blades are equipped with a filter that can be rolled up and replaced to filter smoke and dust, improving the cleaning effect.

[0010] Preferably, the smoke flow rate detection unit is arranged at the inlet end of the air duct, and the smoke flow rate detection unit includes a rotating blade, which is rotatably connected to the support rod through a set rotating shaft, and the other end of the support rod is fixedly connected to the inner wall of the air duct. A rotating frame is provided on the circumference of the rotating blade, and the rotating frame rotates following the rotating blade, and a plurality of shift rods are provided on the circumference of the rotating frame; an external fixing frame is provided on the outer side of the rotating frame, and the external fixing frame is fixedly connected to the air duct, and a plurality of piezoelectric sheets are provided on the inner side wall of the external fixing frame, and a buffer mechanism is provided between the plurality of piezoelectric sheets, and the buffer mechanism includes a sleeve, and guide rods are slidably provided at both ends of the sleeve, and the guide rods are connected to the piezoelectric sheet. A second spring is provided in the sleeve, and the second spring is compressed by the guide rod; the piezoelectric sheet is connected to a rectifier and a control unit through a wire, and the control unit obtains the potential difference generated by the piezoelectric sheet.

[0011] Preferably, a guide member is provided in the air duct, a guide hole is provided in the guide member, the cross-section of the guide hole is a trapezoidal structure, at least one atomizing nozzle is provided at one end of the guide hole away from the smoke flow rate detection unit, the atomizing nozzle is connected to a water guide line, a water tank is provided at the other end of the water guide line, a micro water pump is provided in the water tank, and the micro water pump is connected to the water guide line.

[0012] Preferably, a condenser is provided on the side of the guide member away from the smoke flow rate detection unit, a plurality of capillaries are provided on the surface of the condenser, a cooling bin is connected above the condenser, saltpeter is contained in the cooling bin, a liquid guide tube is connected above the cooling bin, the other end of the liquid guide tube is connected to a sealed box, a piston plate is provided in the sealed box, a follower rod is connected to one side of the piston plate, the follower rod is "L" shaped, and the other end of the follower rod is connected to the top rod; water is contained in the sealed box, a one-way valve is provided in the liquid guide tube, and the piston plate compresses the water in the sealed box into the cooling bin through the guide tube; the collecting bin is arranged directly below the condenser.

[0013] Preferably, a filter is provided between the condenser and the negative pressure fan blades, and fixed clamps are provided on both sides of the filter. The filter can slide in the fixed clamps, and the fixed clamps are a breathable structure; a driving shaft is provided at one end of the filter, and the driving shaft is arranged below the air duct, and the filter is wound on the driving shaft, and the other end of the filter is wound on the driven shaft, and the driven shaft is arranged above the air duct.

[0014] Preferably, an air intake pipe is provided between the filter and the negative pressure fan blade, and the air intake pipe is connected to the air duct; a fan blade is provided in the air intake pipe, and the fan blade is rotatably connected to the inner wall of the air intake pipe, and the fan blade drive is connected to a sixth bevel gear, and the sixth bevel gear is meshed with a seventh bevel gear, and one side of the seventh bevel gear is connected to a rotating rod, and the other end of the rotating rod is connected to an eighth bevel gear, and the eighth bevel gear is meshed with a ninth bevel gear, and the ninth bevel gear is fixedly connected to the driving shaft.

[0015] Preferably, the filter is provided with a cleaning mechanism, which cleans the filter by steam, and the cleaning mechanism includes a partition, which is arranged in the air inlet pipe at one end close to the air duct, and a guide hole is provided on the partition, and a sealing cover is provided above the guide hole, and a through hole is provided on the sealing cover, and at least one third spring is provided inside the sealing cover, one end of the third spring is connected to the sealing cover, and the other end of the third spring is connected to a pressure plate, and the pressure plate can be sealed and crimped with the guide hole, and the other side of the pressure plate is connected to a movable conductive rod, and the movable conductive rod has a "U"-shaped structure.

[0016] Preferably, the cleaning and suction mechanism also includes a water storage box, the water storage box is provided with an air jet, the air jet is arranged toward the filter screen, a heat-conducting column is provided inside the water storage box, the other end of the heat-conducting column extends to the outside of the water storage box, the heat-conducting column is provided with a heating coil, one end of the heating coil is connected to the positive conductive column, the other end of the heating coil is connected to the negative conductive column, and the positive conductive column and the negative conductive column are connected to an alternating voltage.

[0017] Preferably, the positive conductive column is provided with a disconnect port, a conductive block is provided on the inner side of the disconnect port, and the other end of the movable conductive rod is located directly below the disconnect port. When the movable conductive rod moves upward, the movable conductive rod is inserted into the disconnect port and connected with the conductive block to form a passage.

[0018] Preferably, when a fire occurs, the control unit obtains a picture of the smoke on the scene through the on-site camera, and detects the smoke concentration on the scene through the smoke concentration detection module. The detection method includes the following steps: the first step is that the control unit obtains multiple pictures of the smoke on the scene through the camera, and then grayscale processes the multiple pictures to obtain a grayscale image of the smoke, and then performs noise reduction and edge detection on the picture to remove pixel points with protruding edge pixels of the image to enhance the detection effect; the second step is to process the above-mentioned image to remove invalid information such as blank space and obstructions on the picture. The processing process is: a, set the initial threshold G, traverse the picture, and the number of pixels with grayscale values ​​greater than G in each picture is A1, and the number of pixels with grayscale values ​​less than G is A2, calculate the mean B1 of A1 and the mean B2 of A2 in all images; b, the optimal threshold G1 satisfies, G1=(B1+B2) / 2; c After obtaining the optimal threshold, calculate the size of the |G1-G| value. When |G1-G|<η, η≤0.02, use the optimal threshold G1 to binarize all images. When |G1-G|>η, repeat the above steps a and b until |G1-G|<η, then binarize the images to obtain the effective number A3 of pixels larger than G1 in each image; d, calculate the average value of A3 for multiple images to obtain B3; In the third step, the control center determines the current smoke concentration based on B3 in images collected at different time periods. According to the obtained smoke concentration and the smoke flow rate in the air duct obtained by the smoke flow rate detection module, the real-time flow rate and real-time concentration of smoke in the air duct can be controlled in real time to control the water pump in the water tank and the water spray volume of the atomizing nozzle, so that the water spray volume matches the smoke concentration and smoke flow rate, further improving the smoke removal effect.

[0019] In addition, when the present technical solution is working, when a fire occurs, the temperature rises, the paraffin layer in the box body melts, the volume increases, and the top plate and the top rod move to the right. The first spring is compressed. When the first bevel gear contacts the second bevel gear and the third bevel gear, the photoelectric sensor obtains the photoelectric signal and transmits it to the control unit. The control unit then sends a start command to the motor. After the motor is turned on, it drives the second bevel gear, the first bevel gear, and the third bevel gear to rotate. At the same time, the fourth bevel gear and the fifth bevel gear are driven to rotate through the transmission rod shaft. The negative pressure fan blades rotate with the fifth bevel gear and form a negative pressure in the air duct, absorbing the smoke from the fire into the air duct and atomizing water spraying to remove it, greatly reducing the emission of smoke. In addition, combined with the atomizing nozzle, it helps to completely absorb the smoke and enhance the smoke removal effect.

[0020] When the air duct is subjected to negative pressure, smoke enters the duct and the smoke flow rate is detected by the smoke flow rate detection unit. The specific process is as follows: the smoke flowing in the air duct drives the rotating blades to rotate, and the rotating blades drive the rotating frame as they rotate. The lever on the rotating frame also drives the piezoelectric plate, causing the piezoelectric plate to vibrate. When the piezoelectric plate vibrates, a potential difference is generated on both sides of the piezoelectric plate due to the piezoelectric effect. A rectifier and a control unit are connected by wires. After the control unit receives the voltage generated by the piezoelectric plate, the voltage reflects the size of the smoke flow rate in the air duct, thereby obtaining the smoke flow rate. The greater the smoke flow rate in the air duct, the faster the rotating blades rotate, the faster the lever drives the piezoelectric plate to vibrate, and the higher the voltage generated. Conversely, the slower the smoke flow rate, the smaller the voltage generated. Based on the smoke flow rate and the measured smoke concentration, the water pump in the water tank is controlled to control the water spray volume of the atomizing nozzle to completely absorb the smoke. In order to make the piezoelectric piece generate a more stable potential difference, a buffer mechanism is provided between the piezoelectric pieces to buffer the vibration of the piezoelectric piece and improve the stability of the piezoelectric piece vibration. When the piezoelectric piece vibrates, the piezoelectric piece compresses the guide rod to shrink into the sleeve and compresses the second spring in the sleeve to improve the stability of the piezoelectric piece vibration and increase the stability of the generated voltage. At the same time, it prevents the piezoelectric piece from being damaged due to excessive vibration amplitude, or the potential difference generated by the piezoelectric piece being too small due to too small vibration amplitude, resulting in inaccurate measurement. In order to further increase the measurement accuracy and ensure the safety of the piezoelectric piece, the thickness d of the piezoelectric piece satisfies the following relationship with the length L of the piezoelectric piece, the elastic modulus E of the piezoelectric piece, the stiffness coefficient K of the piezoelectric piece, the elastic coefficient k of the second spring, and the maximum elongation length x: d=λ·((KL) 2 +(kx) 2 ) 1 / 2 / E; in the above formula, λ is the relationship coefficient with a value range of 0.64-3.52; d, L, and x are in cm; the above formula is an empirical formula and only performs numerical calculations, not unit calculations.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The intelligent security system of the present invention can eliminate thick smoke at the fire location when a fire occurs, providing more escape time; according to the obtained smoke concentration, combined with the smoke flow rate in the air duct obtained by the smoke flow rate detection module, the real-time smoke flow rate and real-time smoke concentration in the air duct can be controlled in real time to control the water pump in the water tank and control the water spray volume of the atomizing nozzle, so that the water spray volume is matched with the smoke concentration and smoke flow rate, further improving the smoke removal effect.

[0023] The negative pressure fan blades rotate along with the fifth bevel gear and form negative pressure in the air duct, absorbing the smoke from the fire into the air duct and removing it by atomizing water spray, which greatly reduces the emission of smoke. In combination with the atomizing nozzle, it helps to completely absorb the smoke and enhance the smoke removal effect.

[0024] By arranging a buffer mechanism between the piezoelectric sheets, the vibration of the piezoelectric sheets is buffered and the stability of the vibration of the piezoelectric sheets is improved. When the piezoelectric sheets vibrate, the piezoelectric sheet compresses the guide rod to shrink into the sleeve and compresses the second spring in the sleeve to improve the stability of the vibration of the piezoelectric sheets and increase the stability of the generated voltage. At the same time, it prevents the piezoelectric sheets from being damaged due to excessive vibration amplitude, or from being inaccurate in measurement due to the small potential difference generated by the small vibration amplitude of the piezoelectric sheets. By limiting the relationship between the thickness of the piezoelectric sheet and the length of the piezoelectric sheet, the elastic modulus of the piezoelectric sheet, the stiffness coefficient of the piezoelectric sheet, the elastic coefficient of the second spring, and the maximum elongation length, the measurement accuracy is further increased while ensuring the safe use of the piezoelectric sheets.

[0025] By setting up a condensation tube, the mist and smoke can be effectively condensed and collected through a collection bin to prevent the atomized water vapor from sticking to the negative pressure fan, causing the negative pressure fan's operating burden to increase, ensuring the negative pressure fan blades to affect normal operation, and improving the negative pressure fan blades' absorption intensity and absorption rate of the smoke in the air duct, effectively reducing the smoke at the indoor fire scene, reducing the probability of suffocation, and providing sufficient time for people to escape.

[0026] A filter is installed downwind of the condenser to prevent uncondensed atomized water vapor and smoke from damaging the negative pressure fan blades, thereby extending the service life of the negative pressure fan blades; ensuring that negative pressure can be continuously generated in the air duct to absorb as much smoke as possible from the fire scene, and preventing the filter from being clogged. Once the filter is clogged, the normal operation of the negative pressure fan blades will be affected, and the efficiency of the air duct in absorbing smoke will be reduced.

[0027] By setting up a cleaning mechanism to automatically clean the filter, the stubborn dust stuck on the filter can be cleaned, and the small gaps and holes on the filter can be cleaned, and the smoke and oil stuck on the filter can be peeled off, achieving the requirements of high efficiency, water saving, cleanliness and dryness, increasing the filter utilization rate and saving material costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0030] Figure 2 It is a structural schematic diagram of the smoke flow rate detection unit of the present invention.

[0031] Figure 3 It is a schematic diagram of the buffer mechanism of the smoke flow rate detection unit of the present invention.

[0032] Figure 4 It is a partial enlarged schematic diagram of A of the present invention.

[0033] Figure 5 It is a schematic diagram of the condenser structure of the present invention.

[0034] Figure 6 It is a schematic diagram of a cleaning mechanism of the present invention.

[0035] Figure 7 It is a partial enlarged schematic diagram of B of the present invention.

[0036] Figure 8 It is a partial enlarged schematic diagram of C of the present invention.

[0037] Figure 9 It is a schematic diagram of the filter screen driving structure of the present invention.

[0038] Figure 10 It is a system block diagram of the present invention. DETAILED DESCRIPTION

[0039] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. 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.

[0040] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0041] Example 1:

[0042] like Figure 1-3As shown in Figure 10, an intelligent security system includes a shell 1, a box body 2 is provided inside the shell 1, a top plate 3 is provided inside the box body 2, a paraffin layer 4 is provided on one side of the top plate 3, and a rubber sleeve is wrapped on the outside of the paraffin layer 4. A push rod 5 is connected to the other side of the top plate 3, and the other end of the push rod 5 is rotatably connected to a first bevel gear 7. A photoelectric sensor 8 is provided on the first bevel gear 7. A first spring 6 is provided on the push rod 5, one end of the first spring 6 is connected to the push rod 5, and the other end is connected to the inner wall of the box body 2. A second bevel gear 10 and a third bevel gear 11 are spaced apart on one side of the first bevel gear 7. The second bevel gear 10 is connected to a motor 9. Driven by the motor 9, the first bevel gear 7 can be meshed with the second bevel gear 10 and the third bevel gear 11;

[0043] An air duct 16 is provided below the box body 2. The bottom surface of the third bevel gear 11 is connected to a transmission shaft 12. The transmission shaft 12 passes through the wall of the air duct 16. The other end of the transmission shaft 12 is meshedly connected to a fourth bevel gear 13. The fourth bevel gear 13 is meshedly connected to a fifth bevel gear 14. The fifth bevel gear 14 is driven by a negative pressure fan blade 15. The negative pressure fan blade 15 rotates to draw smoke into the air duct 16.

[0044] A smoke flow rate detection unit 17 is provided in the air duct 16. The smoke flow rate detection unit 17 detects the flow rate of smoke drawn into the air duct 16. The control unit processes the smoke image taken by the camera to obtain the smoke concentration. The water spray volume of the atomizing nozzle 19 is set based on the smoke flow rate and smoke concentration. The atomizing nozzle 19 sprays the smoke to absorb and remove the smoke, and a collection bin 28 is provided to collect the absorbed smoke mixture.

[0045] The negative pressure fan blades 15 are provided with a filter 30, which can be rolled up and replaced. The filter 30 filters smoke and dust to improve the cleaning effect.

[0046] The smoke flow rate detection unit 17 is arranged at the inlet end of the air duct 16. The smoke flow rate detection unit 17 includes a rotating blade 171. The rotating blade 171 is rotatably connected to the support rod through a rotating shaft. The other end of the support rod is fixedly connected to the inner wall of the air duct 16. A rotating frame 172 is provided on the peripheral side of the rotating blade 171. The rotating frame 172 rotates with the rotating blade 171. A plurality of levers 173 are provided on the peripheral side of the rotating frame 172. An external fixing frame 174 is provided on the outer side of the rotating frame 172. It is fixedly connected to the air duct 16, and a plurality of piezoelectric sheets 175 are provided on the inner wall of the external fixing frame 174. A buffer mechanism is provided between the plurality of piezoelectric sheets 175. The buffer mechanism includes a sleeve 176. Guide rods 178 are slidably provided at both ends of the sleeve 176. The guide rod 178 is connected to the piezoelectric sheet 175. A second spring 177 is provided in the sleeve 176, and the second spring 177 is compressed by the guide rod 178. The piezoelectric sheet 175 is connected to a rectifier and a control unit through a wire, and the control unit obtains the potential difference generated by the piezoelectric sheet 175.

[0047] When a fire occurs, the control unit obtains a picture of the smoke on site through the on-site camera, and detects the smoke concentration on site through the smoke concentration detection module. The detection method includes the following steps: the first step is that the control unit obtains multiple pictures of the smoke on site through the camera, and then grayscale processes the multiple pictures to obtain a grayscale image of the smoke, and then performs noise reduction and edge detection on the picture to remove the pixel points with prominent edge pixels of the image to enhance the detection effect; the second step is to process the above-mentioned image to remove invalid information such as blank space and obstructions on the picture. The processing process is as follows: a. Set the initial threshold G, traverse the picture, and the number of pixels with grayscale values ​​greater than G in each picture is A1, and the number of pixels with grayscale values ​​less than G is A2. , calculate the mean B1 of A1 and the mean B2 of A2 in all pictures; b, then the optimal threshold G1 satisfies, G1=(B1+B2) / 2; c After obtaining the optimal threshold, calculate the size of the |G1-G| value. When |G1-G|<η, η≤0.02, use the optimal threshold G1 to binarize all pictures. When |G1-G|>η, repeat the above steps a and b until |G1-G|<η, binarize the pictures, and you can get the effective number A3 of pixels in each picture whose pixels are larger than G1; d, calculate the average value of A3 of multiple pictures to get B3; In the third step, the control center judges the current smoke concentration based on B3 in pictures collected at different time periods. According to the obtained smoke concentration, combined with the smoke flow rate in the air duct 16 obtained by the smoke flow rate detection module, the real-time flow rate and real-time concentration of smoke in the air duct 16 can be controlled in real time to control the water pump in the water tank 20, and the water spray volume of the atomizing nozzle 19 can be controlled, so that the water spray volume matches the smoke concentration and smoke flow rate, further improving the smoke removal effect.

[0048] When the present technical solution is working, when a fire occurs, the temperature rises, the paraffin layer 4 in the box body 2 melts, the volume increases, and the top plate 3 and the top rod 5 move to the right. The first spring 6 is compressed. When the first bevel gear 7 contacts the second bevel gear 10 and the third bevel gear 11, the photoelectric sensor 8 obtains the photoelectric signal and transmits it to the control unit. The control unit then sends an opening command to the motor 9. After the motor 9 is turned on, it drives the second bevel gear 10 and the first bevel gear 7 and the third bevel gear 11 to rotate. At the same time, the fourth bevel gear 13 and the fifth bevel gear 14 are driven to rotate through the transmission rod shaft. The negative pressure fan blade 15 rotates with the fifth bevel gear 14 and forms a negative pressure in the air duct 16, which absorbs the smoke from the fire into the air duct 16 and sprays water to remove it, greatly reducing the emission of smoke. In addition, combined with the atomizing nozzle 19, it helps to completely absorb the smoke and enhance the smoke removal effect.

[0049] When the air duct 16 is subjected to negative pressure, smoke enters the air duct 16, and the smoke flow rate detection unit 17 detects the flow rate of the smoke. The specific process is that the smoke flowing in the air duct 16 drives the rotating blade 171 to rotate, and the rotating blade 171 drives the rotating frame 172 when rotating. The lever 173 on the rotating frame 172 drives the piezoelectric piece 175 when rotating, causing the piezoelectric piece 175 to vibrate. When the piezoelectric piece 175 vibrates, a potential difference is generated on both sides of the piezoelectric piece 175 due to the piezoelectric effect. The rectifier and the control unit are connected by wires to control the piezoelectric piece 175. After the control unit receives the voltage generated by the piezoelectric piece 175, it can reflect the size of the smoke flow rate in the air duct 16 according to the size of the voltage, thereby obtaining the flow rate of the smoke; when the smoke flow rate in the air duct 16 is greater, the rotating blade 171 rotates faster, the lever 173 drives the piezoelectric piece 175 to vibrate faster, and the generated voltage is higher. Conversely, the slower the smoke flow rate, the smaller the generated voltage; according to the smoke flow rate and the measured smoke concentration, the water pump in the water tank 20 is controlled to control the water spray volume of the atomizing nozzle 19 to completely adsorb the smoke. In order to make the piezoelectric piece 175 generate a more stable potential difference, a buffer mechanism is provided between the piezoelectric pieces 175 to buffer the vibration of the piezoelectric piece 175 and improve the stability of the vibration of the piezoelectric piece 175. When the piezoelectric piece 175 vibrates, the piezoelectric piece 175 presses the guide rod 178 to shrink into the sleeve 176 and compresses the second spring 177 in the sleeve 176 to improve the stability of the vibration of the piezoelectric piece 175 and increase the stability of the generated voltage. At the same time, it prevents the piezoelectric piece 175 from being damaged due to excessive vibration amplitude, or from being too small to generate a small potential difference and inaccurate measurement due to the piezoelectric piece 175 vibration amplitude. In order to further increase the measurement accuracy and ensure the safety of the piezoelectric piece 175, the thickness d of the piezoelectric piece 175 and the length L of the piezoelectric piece 175, the elastic modulus E of the piezoelectric piece 175, the stiffness coefficient K of the piezoelectric piece 175, the elastic coefficient k of the second spring 177, and the maximum elongation length x satisfy the following relationship: d=λ·((KL) 2 +(kx) 2 ) 1 / 2 / E; in the above formula, λ is the relationship coefficient with a value range of 0.64-3.52; d, L, and x are in cm; the above formula is an empirical formula and only performs numerical calculations, not unit calculations.

[0050] Example 2:

[0051] Please refer to Figure 4-5 On the basis of the first embodiment, a guide member 18 is provided in the air duct 16, and a guide hole is provided in the guide member 18. The cross-section of the guide hole is a trapezoidal structure. At least one atomizing nozzle 19 is provided at one end of the guide hole away from the smoke flow rate detection unit 17. The atomizing nozzle 19 is connected to a water guide line. A water tank 20 is provided at the other end of the water guide line. A micro water pump is provided in the water tank 20, and the micro water pump is connected to the water guide line.

[0052] A condenser 26 is provided on the side of the guide member 18 away from the smoke flow rate detection unit 17, and a plurality of capillaries 27 are provided on the surface of the condenser 26. A cooling bin 25 is connected above the condenser 26, and saltpeter is contained in the cooling bin 25. A liquid guide tube 24 is connected above the cooling bin 25, and the other end of the liquid guide tube 24 is connected to a sealed box 22. A piston plate 23 is provided in the sealed box 22, and a follower rod 21 is connected to one side of the piston plate 23. The follower rod 21 is "L"-shaped, and the other end of the follower rod 21 is connected to the top rod 5; water is contained in the sealed box 22, and the liquid guide tube 24 is provided with a one-way valve. The piston plate 23 compresses the water in the sealed box 22 into the cooling bin 25 through the guide tube; the collecting bin 28 is arranged directly below the condenser 26.

[0053] After the smoke passes through the atomizing nozzle 19, in order to facilitate the collection of atomized water vapor and prevent the atomized water vapor from sticking to the negative pressure fan, which increases the operating burden of the negative pressure fan and affects normal operation, it prevents the generated negative pressure from decreasing and makes it impossible to adsorb the smoke; after the smoke passes through the atomizing nozzle 19, the smoke sticks to the atomized water vapor, and it is necessary to collect the atomized water vapor and completely remove the smoke. A condenser 26 is provided on the downwind side of the guide member 18 to condense the atomized water vapor, and a collection bin 28 is provided directly below the condenser 26 to collect the condensed liquid and smoke mixture; the condensation process of the condenser 26 is called, when the top rod 5 moves to the right, it drives the follower rod 21 to move to the right, and the piston plate 23 connected to the other end of the follower rod 21 is sealed The box body 22 moves, and the water pressure in the sealed box body 22 is directed to the liquid guide pipe 24, and flows to the cooling bin 25 through the liquid guide pipe 24. When the water flows to the cooling bin 25, it reacts with the saltpeter in the cooling bin 25. After the saltpeter is dissolved in water, it absorbs a large amount of heat, which reduces the water temperature. The low-temperature water flows through the condenser tube 26 and fills the capillary tube 27, which effectively increases the contact surface area of ​​the condenser tube 26, effectively condenses the mist and smoke, and collects it through the collection bin 28, preventing the atomized water vapor from sticking to the negative pressure fan, causing the negative pressure fan to increase its operating burden, ensuring that the negative pressure fan blades 15 affect normal operation, and improving the absorption intensity and absorption rate of the negative pressure fan blades 15 on the smoke in the air duct 16, effectively reducing the smoke at the indoor fire scene, reducing the probability of suffocation, and providing sufficient time for people to escape.

[0054] Example 3:

[0055] like Figure 6-9On the basis of Example 1, a filter screen 30 is provided between the condensation tube 26 and the negative pressure fan blade 15, and fixed clamps 29 are provided on both sides of the filter screen 30. The filter screen 30 can slide in the fixed clamps 29, and the fixed clamps 29 are a breathable structure; one end of the filter screen 30 is provided with a driving shaft 31, and the driving shaft 31 is arranged below the air duct 16. The filter screen 30 is wound on the driving shaft 31, and the other end of the filter screen 30 is wound on the driven shaft 32, and the driven shaft 32 is arranged above the air duct 16.

[0056] An air intake pipe 33 is provided between the filter 30 and the negative pressure fan blade 15, and the air intake pipe 33 is connected to the air duct 16; a fan blade 35 is provided in the air intake pipe 33, and the fan blade 35 is rotatably connected to the inner wall of the air intake pipe 33, and the fan blade 35 is driven and connected to the sixth bevel gear 36, and the sixth bevel gear 36 is meshed and connected to the seventh bevel gear 37, and one side of the seventh bevel gear 37 is connected to a rotating rod 38, and the other end of the rotating rod 38 is connected to an eighth bevel gear 39, and the eighth bevel gear 39 is meshed and connected to the ninth bevel gear 40, and the ninth bevel gear 40 is fixedly connected to the driving shaft 31.

[0057] The filter 30 is provided with a cleaning mechanism 34, which cleans the filter 30 through steam. The cleaning mechanism 34 includes a partition 341, which is arranged at one end of the air inlet pipe 33 close to the air duct 16. A guide hole 342 is provided on the partition 341, and a sealing cover 343 is provided above the guide hole 342. A through hole 344 is provided on the sealing cover 343. At least one third spring 345 is provided inside the sealing cover 343, and one end of the third spring 345 is connected to the sealing cover 343, and the other end of the third spring 345 is connected to a pressure plate 346, which can be sealed and crimped with the guide hole 342. The other side of the pressure plate 346 is connected to a movable conductive rod 347, and the movable conductive rod 347 has a "U"-shaped structure.

[0058] The cleaning and suction mechanism also includes a water storage box 352, which is provided with an air jet 353, which is arranged toward the filter 30. A heat-conducting column 351 is provided inside the water storage box 352, and the other end of the heat-conducting column 351 extends to the outside of the water storage box 352. The heat-conducting column 351 is provided with a heating coil 350, and one end of the heating coil 350 is connected to the positive conductive column 349, and the other end of the heating coil 350 is connected to the negative conductive column 348. The positive conductive column 349 and the negative conductive column 348 are connected to an alternating voltage.

[0059] The positive conductive column 349 is provided with a disconnection opening 355, and a conductive block 354 is provided on the inner side of the disconnection opening 355. The other end of the movable conductive rod 347 is located directly below the disconnection opening 355. When the movable conductive rod 347 moves upward, the movable conductive rod 347 is inserted into the disconnection opening 355 and connected with the conductive block 354 to form a passage.

[0060] The filter 30 is provided at the downwind side of the condensation pipe 26 to prevent the uncondensed atomized water vapor and smoke from damaging the negative pressure fan blade 15 and prolonging the service life of the negative pressure fan blade 15; in order to ensure that the negative pressure in the air duct 16 can be continuously generated to absorb as much smoke as possible from the fire scene and prevent the filter 30 from being blocked, after the filter 30 is blocked, the normal operation of the negative pressure fan blade 15 is affected, and the efficiency of the air duct 16 in absorbing smoke is reduced. In order to avoid this situation, when the filter 30 is blocked, the ventilation volume of the filter 30 becomes lower and lower, and the negative pressure fan blade 15 continues to rotate to exhaust so that the air pressure in the air duct 16 on the right side of the filter 30 gradually decreases. When the air pressure in the air duct 16 is less than the set critical value Q, the pressure plate 346 provided at the upper end of the air inlet pipe 33 is opened upward by the action of the negative pressure, and the third spring 345 is compressed. After the pressure plate 346 is opened, a passage is formed between the air inlet pipe 33 and the air duct 16, and the negative pressure fan blade 15 continues to rotate to make the air flow in the air inlet pipe 33 flow at a high speed, driving the air in The fan blade 35 in the air pipe 33 rotates, and the fan blade 35 drives the sixth bevel gear 36, the seventh bevel gear 37, the eighth bevel gear 39, and the ninth bevel gear 40 to rotate during the rotation. The ninth bevel gear 40 drives the driving shaft 31 to rotate. When the driving shaft 31 rotates, the filter 30 is wound and collected. The filter 30 slides in the fixed card plate 29, and a new filter 30 is replaced in the fixed card plate 29. After the new filter 30 is replaced, air flow continues to form in the air duct 16. As the air duct 16 continues to be ventilated, the air pressure in the air duct 16 on the right side of the filter 30 increases relatively. When the air pressure in the air duct 16 is greater than the set critical value Q, the third spring 345 rebounds and presses the pressure plate 346 downward, so that the pressure plate 346 and the guide hole 342 form a seal, and a circuit is formed between the air inlet pipe 33 and the air duct 16. The air inlet pipe 33 is no longer subjected to negative pressure, the fan blade 35 stops rotating, and then the driving shaft 31 stops driving the filter 30 to rotate, so that the filter 30 stops. It should be understood that the critical value Q of the air pressure in the air duct 16 is related to the pressure of the air duct 16. If the set Q is too large, the negative pressure will not be sufficient to overcome the elastic force F of the third spring 345 to open the pressure plate 346. In order to avoid the above situation, the critical value Q satisfies the following: 1 / 3(P1-P2)S+F+mg≤Q≤4 / 5(P1-P2)S+F+mg; in the above formula, P1 is the pressure in the air duct 16 when the filter 30 is not blocked, P2 is the pressure in the air duct 16 when the filter 30 is blocked, and the unit is Pascal; S is the area of ​​the guide hole 342, cm 2 ; F, Q unit, Newton.

[0061] After the filter 30 is replaced, in order to facilitate the reuse of the filter 30 and save costs, the clogged filter 30 is automatically cleaned when the filter 30 is replaced. The specific cleaning process is that when the pressure plate 346 is moved upward by the negative pressure to open, the pressure plate 346 drives the movable conductive rod 347 to move upward. When the movable conductive rod 347 moves upward, the other end of the movable conductive rod 347 is inserted into the disconnection port 355 of the positive conductive column 349, and the movable conductive rod 347 is connected to the conductive block 354, so that the positive conductive column 349, the negative conductive column 348, and the heating coil 350 form a passage. After the passage is formed, the heating coil 350 contacts the conductive column. The heat column 351 is heated. Due to the electromagnetic eddy current phenomenon, the heat-conducting column 351 will be heated in a short time. At the same time, the heat-conducting column 351 transfers heat to the water in the water storage box 352, heating the water and making the water boil. After the water boils, the pressure in the water storage box 352 increases, causing steam to be quickly ejected from the jet port 353 to clean the filter 30. It can clean the stubborn dust stuck on the filter 30, clean the small gaps and holes on the filter 30, and peel off the smoke and oil stuck on the filter 30, thereby achieving the requirements of high efficiency, water saving, cleanliness and dryness, increasing the utilization rate of the filter 30 and saving material costs.

[0062] The device obtained by the above technical solution is an intelligent security system that can eliminate thick smoke at the fire location when a fire occurs, providing more escape time. Based on the obtained smoke concentration, combined with the smoke flow rate in the air duct obtained by the smoke flow rate detection module, it can control the real-time smoke flow rate and real-time smoke concentration in the air duct to control the water pump in the water tank, and control the water spray volume of the atomizing nozzle, so that the water spray volume matches the smoke concentration and smoke flow rate, further improving the smoke removal effect. The negative pressure fan blades follow the rotation of the fifth bevel gear and form a negative pressure in the air duct, absorbing the smoke from the fire into the air duct and removing it through atomized water spray, greatly reducing the emission of smoke. In combination with the atomizing nozzle, it helps to completely absorb the smoke, enhancing the smoke removal effect. The invention provides a buffer mechanism between the piezoelectric sheets to buffer the vibration of the piezoelectric sheets and improve the stability of the piezoelectric sheet vibration. When the piezoelectric sheet vibrates, the piezoelectric sheet compresses the guide rod to shrink into the sleeve and compresses the second spring in the sleeve to improve the stability of the piezoelectric sheet vibration and increase the stability of the generated voltage. At the same time, it prevents the piezoelectric sheet from being damaged due to excessive vibration amplitude or from having too small a potential difference due to too small a vibration amplitude, which leads to inaccurate measurement. By limiting the relationship between the thickness of the piezoelectric sheet and the length of the piezoelectric sheet, the elastic modulus of the piezoelectric sheet, the stiffness coefficient of the piezoelectric sheet, the elastic coefficient of the second spring, and the maximum elongation length, the measurement accuracy is further increased while ensuring the safety of the piezoelectric sheet. By providing a condenser, the mist and smoke are effectively condensed and collected by a collection bin, preventing the atomized water vapor from adhering to the negative pressure fan, causing the negative pressure fan to increase its operating burden, ensuring that the negative pressure fan blades affect normal operation, and improving the absorption intensity and absorption rate of the negative pressure fan blades on the smoke in the air duct, effectively reducing the smoke at the indoor fire scene, reducing the probability of suffocation, and providing sufficient time for people to escape. A filter is installed downwind of the condenser to prevent uncondensed atomized water vapor and smoke from damaging the negative pressure fan blades, extending their service life. This ensures continuous negative pressure within the air duct to absorb as much smoke as possible from the fire scene, preventing filter clogging, which would affect the normal operation of the negative pressure fan blades and reduce the air duct's efficiency in absorbing smoke. A cleaning mechanism automatically cleans the filter, removing stubborn dust and small gaps and holes in the filter, removing smoke and oil stains adhering to the filter. This achieves high efficiency, water conservation, cleanliness, and dryness, increasing filter utilization and saving material costs.

[0063] Other technical solutions not elaborated in detail in the present invention are all existing technologies in the field and will not be described in detail here.

[0064] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and variations. 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. An intelligent security system, characterized in that: The invention comprises a shell (1), wherein a box body (2) is provided inside the shell (1), a top plate (3) is provided inside the box body (2), a paraffin layer (4) is provided on one side of the top plate (3), and a rubber sleeve is wrapped on the outside of the paraffin layer (4), and a top rod (5) is connected to the other side of the top plate (3), and the other end of the top rod (5) is rotatably connected to a first bevel gear (7), and a photoelectric sensor (8) is provided on the first bevel gear (7), and a first spring (6) is provided on the top rod (5), and one end of the first spring (6) is connected to the top rod (5), and the other end is connected to the inner wall of the box body (2), and a second bevel gear (10) and a third bevel gear (11) are provided on one side of the first bevel gear (7), and the second bevel gear (10) is connected to a motor (9). When driven by the motor (9), the first bevel gear (7) can be meshed with the second bevel gear (10) and the third bevel gear (11); An air duct (16) is provided below the box body (2), the bottom surface of the third bevel gear (11) is connected to a transmission shaft (12), the transmission shaft (12) penetrates the wall of the air duct (16), and the other end of the transmission shaft (12) is meshedly connected to a fourth bevel gear (13), the fourth bevel gear (13) is meshedly connected to a fifth bevel gear (14), the fifth bevel gear (14) is driven by a negative pressure fan blade (15), and the negative pressure fan blade (15) rotates to draw smoke into the air duct (16); A smoke flow rate detection unit (17) is provided in the air duct (16). The smoke flow rate detection unit (17) detects the flow rate of smoke drawn into the air duct (16). The control unit processes the smoke photo taken by the camera to obtain the smoke concentration. The water spraying amount of the atomizing nozzle (19) is set based on the smoke flow rate and the smoke concentration. The smoke is adsorbed and removed by the spray of the atomizing nozzle (19), and a collection bin (28) is provided to collect the adsorbed smoke mixture. The negative pressure fan blade (15) is provided with a filter (30), which can be rolled up and replaced. The filter (30) filters smoke and dust to improve the cleaning effect; The smoke flow rate detection unit (17) is arranged at the inlet end of the air duct (16), and the smoke flow rate detection unit (17) includes a rotating blade (171), the rotating blade (171) is rotatably connected to the support rod through a set rotating shaft, and the other end of the support rod is fixedly connected to the inner wall of the air duct (16), and a rotating frame (172) is provided on the peripheral side of the rotating blade (171), and the rotating frame (172) rotates following the rotating blade (171), and a plurality of shifting rods (173) are provided on the peripheral side of the rotating frame (172); an external fixing frame (174) is provided on the outer side of the rotating frame (172), and the external fixing frame (174) is fixed to the inner wall of the air duct (16). 74) is fixedly connected to the air duct (16), the inner wall of the external fixing frame (174) is provided with a plurality of piezoelectric sheets (175), a buffer mechanism is provided between the plurality of piezoelectric sheets (175), the buffer mechanism includes a sleeve (176), both ends of the sleeve (176) are slidably provided with guide rods (178), the guide rods (178) are connected to the piezoelectric sheets (175), a second spring (177) is provided in the sleeve (176), and the second spring (177) is compressed by the guide rod (178); the piezoelectric sheets (175) are connected to a rectifier and a control unit through a wire, and the control unit obtains the potential difference generated by the piezoelectric sheets (175).

2. The intelligent security system according to claim 1, characterized in that: The air duct (16) is provided with a flow guide (18), the flow guide (18) is provided with a flow guide hole, the cross section of the flow guide hole is a trapezoidal structure, and at least one atomizing nozzle (19) is provided at one end of the flow guide hole away from the smoke flow rate detection unit (17), the atomizing nozzle (19) is connected to a water guide line, the other end of the water guide line is provided with a water tank (20), a micro water pump is provided in the water tank (20), and the micro water pump is connected to the water guide line.

3. The intelligent security system according to claim 2, characterized in that: A condenser (26) is provided on the side of the flow guide (18) away from the smoke flow rate detection unit (17), a plurality of capillaries (27) are provided on the surface of the condenser (26), a cooling chamber (25) is connected above the condenser (26), saltpeter is contained in the cooling chamber (25), a liquid guide tube (24) is connected above the cooling chamber (25), the other end of the liquid guide tube (24) is connected to a sealed box (22), a piston is provided in the sealed box (22) The piston plate (23) is connected to a follower rod (21) on one side of the piston plate (23), the follower rod (21) is L-shaped, and the other end of the follower rod (21) is connected to the top rod (5); the sealed box (22) is filled with water, the liquid guide pipe (24) is provided with a one-way valve, and the piston plate (23) compresses the water in the sealed box (22) into the cooling chamber (25) through the guide pipe; the collecting chamber (28) is arranged just below the condenser (26).

4. The intelligent security system according to claim 3, characterized in that: A filter screen (30) is provided between the condenser (26) and the negative pressure fan blade (15), and fixed card plates (29) are provided on both sides of the filter screen (30). The filter screen (30) can slide in the fixed card plates (29), and the fixed card plates (29) are air-permeable structures; one end of the filter screen (30) is provided with a driving shaft (31), the driving shaft (31) is arranged below the air duct (16), the filter screen (30) is wound around the driving shaft (31), and the other end of the filter screen (30) is wound around a driven shaft (32), and the driven shaft (32) is arranged above the air duct (16).

5. The intelligent security system according to claim 4, characterized in that: An air intake pipe (33) is provided between the filter screen (30) and the negative pressure fan blade (15), and the air intake pipe (33) is communicated with the air duct (16); a fan blade (35) is provided in the air intake pipe (33), and the fan blade (35) is rotatably connected to the inner wall of the air intake pipe (33); the fan blade (35) is drivingly connected to a sixth bevel gear (36), and the sixth bevel gear (36) is meshedly connected to a seventh bevel gear (37); one side of the seventh bevel gear (37) is connected to a rotating rod (38), and the other end of the rotating rod (38) is connected to an eighth bevel gear (39), and the eighth bevel gear (39) is meshedly connected to a ninth bevel gear (40), and the ninth bevel gear (40) is fixedly connected to the driving shaft (31).

6. The intelligent security system according to claim 4, characterized in that: The filter (30) is provided with a cleaning mechanism (34), and the cleaning mechanism (34) cleans the filter (30) by steam. The cleaning mechanism (34) includes a partition (341), and the partition (341) is arranged at one end of the air inlet pipe (33) close to the air duct (16). The partition (341) is provided with a guide hole (342), and a sealing cover (343) is provided above the guide hole (342). The sealing cover (343) is provided with a through hole (344). At least one third spring (345) is provided inside the sealing cover (343), and one end of the third spring (345) is connected to the sealing cover (343). The other end of the third spring (345) is connected to a pressure plate (346), and the pressure plate (346) can be sealed and pressed with the guide hole (342). The other side of the pressure plate (346) is connected to a movable conductive rod (347), and the movable conductive rod (347) is in a "U"-shaped structure.

7. The intelligent security system according to claim 6, characterized in that: The cleaning and suction mechanism further comprises a water storage box (352), wherein the water storage box (352) is provided with an air jet (353), and the air jet (353) is arranged toward the filter (30), and a heat-conducting column (351) is provided inside the water storage box (352), and the other end of the heat-conducting column (351) extends to the outside of the water storage box (352), and the heat-conducting column (351) is provided with a heating coil (350), and one end of the heating coil (350) is connected to the positive conductive column (349), and the other end of the heating coil (350) is connected to the negative conductive column (348), and the positive conductive column (349) and the negative conductive column (348) are connected to an alternating voltage.

8. The intelligent security system according to claim 7, characterized in that: The positive conductive column (349) is provided with a disconnection opening (355), and a conductive block (354) is provided inside the disconnection opening (355). The other end of the movable conductive rod (347) is located directly below the disconnection opening (355). When the movable conductive rod (347) moves upward, the movable conductive rod (347) is inserted into the disconnection opening (355) and communicates with the conductive block (354) to form a passage.

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