Alarm device based on image recognition

Abstract

The alarm device based on image recognition comprises a detector body and further comprises a mounting frame, the front end of the mounting frame is open, the detector body is mounted in the mounting frame, an ash wiping structure is further mounted in the mounting frame, the detector body is located at the top of the ash wiping structure, and the ash wiping structure is connected with the detector body. A replaceable lens assembly is arranged at the front end of the detector main body; the replaceable lens assembly comprises a first rotating motor installed at the bottom of the detector body, a first rotating shaft is installed at the output end of the first rotating motor, two replaceable lenses are symmetrically installed on the two sides of the first rotating shaft, one replaceable lens is arranged at the front end of the detector body in an attached mode, and the other replaceable lens is arranged at the rear end of the detector body in an attached mode. The other replaceable lens is located at the front end of the ash wiping structure, and the replaceable lens is cleaned through the ash wiping structure, so that the problem that search and rescue are affected due to the fact that a traditional device cannot shoot a specific picture of a fire scene when a fire occurs can be solved.

Description

Technical Field

[0001] The invention relates to an alarm device based on image recognition, belonging to the technical field of fire alarm. Background Art

[0002] Smoke alarms prevent fires by monitoring the concentration of smoke. They use ionized smoke sensors, which are technologically advanced, stable and reliable sensors that are widely used in various fire alarm systems. Their performance is far superior to that of gas-sensitive resistor fire alarms. Smoke alarms are often installed in some indoor buildings to warn of fires and work together with monitoring components. When smoke alarms detect smoke, they sound an alarm to warn people to evacuate, thereby reducing casualties and property losses when fires occur.

[0003] Chinese patent CN112330913A discloses a smoke alarm, which has a monitoring component and a smoke sensor component. After the monitoring component and the smoke sensor component are electrically connected and powered on, the smoke alarm can timely obtain the specific situation of the fire while the smoke alarm is sounding; however, there are the following problems:

[0004] First, in order not to affect the use of other devices and to detect smoke at the first time, smoke alarms are basically installed on the indoor ceiling to work, and some smoke detectors are equipped with cameras to transmit real-time images of the fire scene. However, when a fire occurs, a certain amount of smoke will first form at the fire scene, and the smoke will spread from the bottom to the top. At this time, the smoke alarm can quickly detect the smoke to provide an alarm, but the camera at the top will also come into contact with the smoke. When it is assumed that there is smoke nearby, the picture taken by the camera will be blocked by the smoke;

[0005] Second, when the smoke alarm detects a fire, as the fire continues to expand and spread, there will be ashes flying around in the process of smoke, and the ashes flying around will adhere to the surface of the camera lens to varying degrees, blocking the lens's line of sight;

[0006] Both of the above situations will result in the camera being unable to directly observe and photograph the fire scene, making the fire scene monitoring function unusable, and thus unable to guide trapped people to escape, which can easily threaten people’s lives and property safety. Summary of the invention

[0007] In order to solve the above problems existing in the prior art, the present invention provides an alarm device based on image recognition, which can avoid the problem that the traditional device cannot capture the specific picture of the fire scene when a fire occurs, which affects the search and rescue.

[0008] The technical solution of the present invention is as follows:

[0009] An alarm device based on image recognition includes a detector body and a mounting frame, wherein the front end of the mounting frame is open, the detector body is mounted inside the mounting frame, an ash wiping structure is also installed inside the mounting frame, the detector body is located on the top of the ash wiping structure, and a replaceable lens assembly is arranged at the front end of the detector body; the replaceable lens assembly includes a first rotating motor installed at the bottom of the detector body, a first rotating shaft is installed at the output end of the first rotating motor, two replaceable lenses are symmetrically installed on both sides of the first rotating shaft, one of the replaceable lenses is fitted at the front end of the detector body, and the other of the replaceable lenses is located at the front end of the ash wiping structure, and the replaceable lens is cleaned by the ash wiping structure.

[0010] Wherein, the ash wiping structure comprises a gourd-shaped frame arranged horizontally, the gourd-shaped frame comprises a first cavity and a second cavity inside, the first cavity and the second cavity are connected; two gears are arranged on the back of the gourd-shaped frame, the two gears are respectively located at the back of the first cavity and the second cavity, and the two gears are meshed with each other, a second rotating shaft is installed at the center of the two gears, one end of the second rotating shaft is rotatably installed at the rear end of the installation frame through a bearing, and the other end of the second rotating shaft is fixedly connected to the output end of the second rotating motor, and the second rotating motor is fixedly installed at the rear end of the installation frame; rotating discs are installed at the front ends of the two second rotating shafts, the two rotating discs are respectively located inside the first cavity and the second cavity, and three semicircular notches are circumferentially opened on the two rotating discs; a driving cavity is left between the rotating disc and the inner wall of the gourd-shaped frame, and three groups of driving rod structures are slidably installed inside the driving cavity; cleaning soft glue is wound around the three groups of driving rod structures, and a rod changing structure is arranged on the bottom surface of the interior of the installation frame, and the rod changing structure is used to limit the movement trajectory of the driving rod structure.

[0011] Among them, a gourd-shaped track is arranged on the inner wall of the gourd-shaped frame, and the driving rod structure includes a driving disk, the driving disk slides inside the gourd-shaped track, and the outer arc of the driving disk fits with the semicircular notch, a stirring rod is fixedly arranged at the center of the driving disk, and the cleaning soft rubber is wrapped around the stirring rod.

[0012] Among them, the rod-changing structure includes a fixing frame fixedly installed on the inner bottom surface of the installation frame, a follower shaft is rotatably arranged at the front end of the fixing frame, an inverted T-shaped block is installed at the end of the follower shaft, the rear end of the stirring rod exceeds the rear end of the gourd-shaped frame, and the inverted T-shaped block is located at the rear end of the gourd-shaped frame, and the movement trajectory of the stirring rod is in an 8-shape due to the setting of the inverted T-shaped block.

[0013] Among them, the inverted T-shaped block includes a vertical rod and a horizontal rod, and the follower shaft is arranged at the intersection of the vertical rod and the horizontal rod; an arc-shaped slide groove is opened at the front end of the horizontal rod, the opening of the arc-shaped slide groove faces upward, and a limit rod is slidably arranged inside the arc-shaped slide groove, and a spring is fixed on the limit rod, and the other end of the spring is fixedly arranged at the end of the vertical rod away from the horizontal rod.

[0014] Among them, an outer frame is rotatably installed outside the installation frame, a motor box is installed on the top of the outer frame, a third rotating motor is arranged inside the motor box, and the output end of the third rotating motor rotates out of the motor box and is fixedly connected to the top of the outer frame.

[0015] Among them, a closed disc is installed on the top of the motor box, a fixed disc is arranged above the closed disc, an electric push rod is arranged at the bottom of the fixed disc, the output end of the electric push rod is fixedly arranged on the top of the closed disc, and a smoke sensor is fixedly installed on the detector body, and the output end of the smoke sensor is electrically connected to the input end of the electric push rod.

[0016] The detector body includes a fire prevention camera and an infrared flame spectrum detector, which perform real-time dual image acquisition to comprehensively judge and identify the fire situation image.

[0017] Among them, the outside of the closed disc is adsorbed with a fireproof cover body through an electromagnet, the inner wall of the fireproof cover body is provided with a plurality of vertical grooves, the outer arc surface of the closed disc is provided with a plurality of protrusions, and the protrusions are slidably arranged with the vertical grooves; the output end of the detector body is electrically connected to the input end of the electromagnet.

[0018] Wherein, a top fixing seat is fixedly arranged at the top of the fixed disc, and an ear plate is fixedly installed circumferentially on the top fixing seat.

[0019] The present invention has the following beneficial effects:

[0020] The present invention provides an ash wiping structure and cooperates with a replaceable lens assembly, so that after a fire occurs, when the ashes are constantly scattered, the ash wiping structure can be used to wipe the ashes. At the same time, due to the internal stirring cooperation of the ash wiping structure, the wiping range of the cleaning soft glue is expanded, which can meet the needs of multiple wiping.

[0021] At the same time, the present invention can also lower the detector body to the ground after a fire occurs. Since the smoke floats from the bottom to the top, the impact of the smoke on the detector body can be reduced, avoiding the smoke blocking the picture taken by the detector body, which in turn makes it impossible to directly observe and photograph the fire scene, and the monitoring function of the fire scene cannot be used, and the trapped people cannot be guided to escape, which leads to threats to people’s lives and property safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a front view of the ash wiping structure of the present invention (the gear is not shown);

[0024] Figure 3 It is a rear view of the ash wiping structure of the present invention;

[0025] Figure 4 It is a schematic diagram of the rod changing structure of the present invention.

[0026] The reference numerals in the figure are as follows:

[0027] 1. Detector body; 2. Mounting frame; 3. First rotating shaft; 4. Interchangeable lens; 5. Gourd-shaped frame; 6. Gear; 7. Second rotating shaft; 8. Rotating disc; 9. Semicircular notch; 10. Cleaning soft glue; 11. Driving disc; 12. Stirring rod; 13. Fixed frame; 14. Follow-up shaft; 15. Inverted T-shaped block; 16. Outer frame; 17. Motor box; 18. Third rotating motor; 19. Closed disc; 20. Fixed disc; 21. Electric push rod; 22. Fireproof cover; 23. Vertical groove; 24. Top fixed seat; 25. Ear plate; 151. Vertical rod; 152. Cross rod; 153. Arc slide groove; 154. Limit rod; 155. Spring; 51. First cavity; 52. Second cavity; 53. Driving cavity. DETAILED DESCRIPTION

[0028] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] See also Figures 1 to 4 , the invention provides a technical solution:

[0030] An alarm device based on image recognition includes a detector body 1, the detector body 1 includes a fire prevention camera and an infrared flame spectrum detector, real-time dual image acquisition is performed through the fire prevention camera and the infrared flame spectrum detector, and a comprehensive judgment and recognition of the fire situation picture is performed, and a smoke sensor is fixedly installed on the detector body 1;

[0031] It also includes a mounting frame 2, the front end of which is open, the detector body 1 is mounted inside the mounting frame 2, an ash wiping structure is also installed inside the mounting frame 2, the detector body 1 is located on the top of the ash wiping structure, and a replaceable lens assembly is arranged at the front end of the detector body 1; the replaceable lens assembly includes a first rotating motor installed at the bottom of the detector body 1, a first rotating shaft 3 is installed at the output end of the first rotating motor, two replaceable lenses 4 are symmetrically installed on both sides of the first rotating shaft 3, one of the replaceable lenses 4 is fitted at the front end of the detector body 1, and the other replaceable lens 4 is located at the front end of the ash wiping structure, and the replaceable lens 4 is cleaned by the ash wiping structure; when one of the replaceable lenses 4 is covered with ashes, the first rotating motor is rotated to make the two symmetrically arranged replaceable lenses 4 exchange positions, that is, the replaceable lens 4 covered with ashes is rotated to the ash wiping structure for cleaning, and the clean replaceable lens 4 is rotated to the front end of the detector body 1, so that a clean visual range can be restored;

[0032] The ash wiping structure includes a gourd-shaped frame 5 arranged horizontally, and the gourd-shaped frame 5 includes a first cavity 51 and a second cavity 52 inside, and the first cavity 51 and the second cavity 52 are connected; two gears 6 are arranged on the back of the gourd-shaped frame 5, and the two gears 6 are respectively located at the back of the first cavity 51 and the second cavity 52, and the two gears 6 are meshed with each other, and a second rotating shaft 7 is installed at the center of the two gears 6, one end of the second rotating shaft 7 is rotatably installed at the rear end of the installation frame 2 through a bearing, and the other end of the second rotating shaft 7 is fixedly connected to the output end of the second rotating motor, and the second rotating motor is fixedly installed at the rear end of the installation frame 2. Through the rotation of the second rotating motor, one of the gears 6 is driven to rotate, and due to the meshing effect, the other gear 6 will be driven to rotate; rotating discs 8 are installed at the front ends of the two second rotating shafts 7, and the two rotating discs 8 are respectively located in the first cavity 51 and the second cavity 52, and one end of the two rotating discs 8 is always in contact with each other, and the two rotating discs 8 are on Three semicircular notches 9 are provided in the circumferential direction; specifically, when the semicircular notches 9 on the two rotating discs 8 are rotated to the position where the two rotating discs 8 are in contact, the two semicircular notches 9 will be combined to form a complete circular cavity, and a driving cavity 53 is left between the rotating disc 8 and the inner wall of the gourd-shaped frame 5, and three groups of driving rod structures are slidably installed inside the driving cavity 53, and at the same time, a rod-changing structure is provided on the bottom surface of the inner part of the mounting frame 2. Through the action of the rod-changing structure, the three groups of driving rod structures are all detoured in the driving cavity 53 in an "8" shape; cleaning soft glue 10 is wound around the three groups of driving rod structures, and when it is necessary to clean the ashes, the cleaning soft glue 10 is detoured in an "8" shape due to the three groups of driving rod structures. At this time, the cleaning soft glue 10 is continuously kneaded and deformed due to its sticky characteristics, and the ashes adsorbed on a position on the cleaning soft glue 10 can be transferred, and then the remaining clean positions on the cleaning soft glue 10 are continuously exposed under the stirring deformation, so that the use area can be increased, and more ashes can be pasted;

[0033] A gourd-shaped track is arranged on the inner wall of the gourd-shaped frame 5, and the driving rod structure includes a driving disk 11, which slides inside the gourd-shaped track, and the outer arc of the driving disk 11 fits with the semicircular notch 9, and a stirring rod 12 is fixedly arranged at the center of the driving disk 11, and a cleaning soft glue 10 is wound around the stirring rod 12; the rod changing structure includes a fixing frame 13 fixedly installed on the inner bottom surface of the installation frame 2, and a follower shaft 14 is rotatably arranged at the front end of the fixing frame 13, and an inverted T-shaped block 15 is installed at the end of the follower shaft 14, and the rear end of the stirring rod 12 exceeds the rear end of the gourd-shaped frame 5, and the inverted T-shaped block 15 is located at the rear end of the gourd-shaped frame 5, and the motion trajectory of the stirring rod 12 is in an 8-shape through the arrangement of the inverted T-shaped block 15;

[0034] Specifically, since the outer arc of the driving disk 11 fits with the semicircular notch 9, the driving disk 11 will move along with the semicircular notch 9 as the rotating disk 8 rotates. If there is no restriction on the rod-changing structure, the driving disk 11 will always perform circular motion with the semicircular notch 9. By setting the rod-changing structure, when the driving disk 11 rotates to the position where the two rotating disks 8 are in contact, the two semicircular notches 9 will be combined to form a complete circular hole because the two rotating disks 8 are in contact with each other. The driving disk 11 will fit in the circular hole as a whole. For example, when one of the driving disks 11 is located in the first cavity 51, the rotating disk 8 on the first cavity 51 rotates, and at this time, the inverted T-shaped block 15 will be tilted, and the top of the inverted T-shaped block 15 will be arranged toward the first cavity 51. When the driving disk 11 fits in the circular hole as a whole, one end of the stirring rod 12 on the driving disk 11 will be in contact with the inverted T-shaped block 15. The upper end is fitted. At this time, since the top of the inverted T-shaped block 15 is set toward the first cavity 51, the driving disk 11 and the stirring rod 12 will be restricted by the inverted T-shaped block 15 and cannot continue to make a circular motion in the first cavity 51, and then change the motion trajectory to the second cavity 52, and move along with the semicircular notch 9 of the driving disk 11 of the second cavity 52, that is, the driving disk 11 and the stirring rod 12 change direction to the second cavity 52 after moving a circle in the first cavity 51, and the motion trajectory can be changed to an "8" shape; further, after changing direction to the second cavity 52, the driving disk 11 and the stirring rod 12 continue to rotate with the driving disk 11, and in the subsequent rotation process, they will fit with the lower end of the inverted T-shaped block 15, causing the inverted T-shaped block 15 originally tilted toward the first cavity 51 to be converted to tilted toward the second cavity 52; that is, the "8" shape motion can be performed reciprocatingly as described above;

[0035] The inverted T-shaped block 15 includes a vertical rod 151 and a horizontal rod 152, and the follower shaft 14 is arranged at the intersection of the vertical rod 151 and the horizontal rod 152; an arc-shaped slide groove 153 is provided at the front end of the horizontal rod 152, the arc-shaped slide groove 153 opens upward, and a limit rod 154 is slidably arranged inside the arc-shaped slide groove 153, and a spring 155 is fixedly arranged on the limit rod 154, and the other end of the spring 155 is fixedly arranged at one end of the vertical rod 151 away from the horizontal rod 152;

[0036] The spring 155 can ensure that when the inverted T-shaped block 15 is changed from being originally tilted toward the first cavity 51 to being tilted toward the second cavity 52, the instability caused by repeated rotation due to the force will not occur;

[0037] An outer frame 16 is rotatably mounted on the outside of the installation frame 2, a motor box 17 is mounted on the top of the outer frame 16, a third rotating motor 18 is arranged inside the motor box 17, and the output end of the third rotating motor 18 rotates through the motor box 17 and is fixedly connected to the top of the outer frame 16; the third rotating motor 18 can drive the outer frame 16 to rotate circumferentially, and synchronously make the installation frame 2 rotate circumferentially, so as to realize 360° monitoring;

[0038] A closed disc 19 is installed on the top of the motor box 17, a fixed disc 20 is arranged above the closed disc 19, an electric push rod 21 is arranged at the bottom of the fixed disc 20, and the output end of the electric push rod 21 is fixedly arranged on the top of the closed disc 19, and the output end of the smoke sensor is electrically connected to the input end of the electric push rod 21; when a fire occurs, the electric push rod 21 receives an electrical signal from the smoke sensor, so that the electric push rod 21 is extended, and the device under the closed disc 19 is moved down until the installation frame 2 reaches the ground, so as to avoid the rising smoke from blocking the picture taken by the detector body 1; as a preferred embodiment, a fan or other structure can also be installed under the fixed disc 20 to suck the smoke and the like toward the detector body 1 like a range hood, so as to disperse the smoke around the detector body 1 and reduce the interference with the shooting picture;

[0039] As a preferred embodiment, the outside of the closed disc 19 is adsorbed with a fireproof cover 22 through an electromagnet, the inner wall of the fireproof cover 22 is provided with a plurality of vertical grooves 23, and the outer arc surface of the closed disc 19 is provided with a plurality of protrusions, which are slidably arranged with the vertical grooves 23; the output end of the detector body 1 is electrically connected to the input end of the electromagnet; when the fire continues to spread and is about to approach the device, the detector body 1 sends a signal to disconnect the power supply of the electromagnet, and the fireproof cover 22 is no longer adsorbed and automatically slides downward along the vertical grooves 23. When the fireproof cover 22 falls to the bottom, the top of the fireproof cover 22 will cooperate with the closed disc 19 to form a complete fire protection zone, which can protect the internal detector body 1 and prevent the internal structure from being baked by high temperature;

[0040] A top fixing seat 24 is fixedly provided at the top of the fixing disc 20 , and an ear plate 25 is fixedly installed circumferentially on the top fixing seat 24 ; the ear plate 25 can be used to firmly fix the structure on the ceiling.

[0041] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An alarm device based on image recognition, comprising a detector body (1), characterized in that: The invention also comprises a mounting frame (2), the front end of which is open, the detector body (1) being mounted inside the mounting frame (2), an ash wiping structure being also mounted inside the mounting frame (2), the detector body (1) being located on the top of the ash wiping structure, and a replaceable lens assembly being arranged at the front end of the detector body (1); the replaceable lens assembly comprising a first rotating motor mounted at the bottom of the detector body (1), a first rotating shaft (3) being mounted at the output end of the first rotating motor, two replaceable lenses (4) being symmetrically mounted on both sides of the first rotating shaft (3), one of the replaceable lenses (4) being fitted at the front end of the detector body (1), and the other of the replaceable lenses (4) being located at the front end of the ash wiping structure, and the replaceable lens (4) being cleaned by the ash wiping structure.

2. The image recognition-based alarm device according to claim 1, characterized in that: The ash wiping structure comprises a gourd-shaped frame (5) arranged transversely, wherein the gourd-shaped frame (5) comprises a first cavity (51) and a second cavity (52) inside, wherein the first cavity (51) and the second cavity (52) are communicated with each other; two gears (6) are arranged on the back of the gourd-shaped frame (5), wherein the two gears (6) are respectively located on the back of the first cavity (51) and the second cavity (52), and the two gears (6) are meshed with each other, and a second rotating shaft (7) is installed at the center of the two gears (6), wherein one end of the second rotating shaft (7) is rotatably installed at the rear end of the installation frame (2) through a bearing, and the other end of the second rotating shaft (7) is fixedly connected to the output of the second rotating motor end, the second rotating motor is fixedly mounted at the rear end inside the mounting frame (2); a rotating disc (8) is mounted at the front end of each of the two second rotating shafts (7), the two rotating discs (8) are respectively located inside the first cavity (51) and the second cavity (52), and three semicircular notches (9) are circumferentially opened on the two rotating discs (8); a driving cavity (53) is reserved between the rotating disc (8) and the inner wall of the gourd-shaped frame (5), and three groups of driving rod structures are slidably mounted inside the driving cavity (53); a cleaning soft rubber (10) is wound around the three groups of driving rod structures, and a rod changing structure is arranged on the bottom surface inside the mounting frame (2), and the rod changing structure is used to limit the movement trajectory of the driving rod structure.

3. The image recognition-based alarm device according to claim 2, characterized in that: A gourd-shaped track is arranged on the inner wall of the gourd-shaped frame (5); the driving rod structure comprises a driving disk (11); the driving disk (11) slides inside the gourd-shaped track, and the outer arc of the driving disk (11) fits with the semicircular notch (9); a stirring rod (12) is fixedly arranged at the center of the driving disk (11), and the cleaning soft glue (10) is wound around the stirring rod (12).

4. The image recognition-based alarm device according to claim 3, characterized in that: The rod-changing structure comprises a fixing frame (13) fixedly mounted on the inner bottom surface of the mounting frame (2); a follower shaft (14) is rotatably arranged at the front end of the fixing frame (13); an inverted T-shaped block (15) is mounted at the end of the follower shaft (14); the rear end of the stirring rod (12) exceeds the rear end of the gourd-shaped frame (5), and the inverted T-shaped block (15) is located at the rear end of the gourd-shaped frame (5); and the movement trajectory of the stirring rod (12) is in an 8-shaped shape due to the arrangement of the inverted T-shaped block (15).

5. The image recognition-based alarm device according to claim 4, characterized in that: The inverted T-shaped block (15) comprises a vertical rod (151) and a horizontal rod (152), and the follower shaft (14) is arranged at the intersection of the vertical rod (151) and the horizontal rod (152); an arc-shaped sliding groove (153) is provided at the front end of the horizontal rod (152), the opening of the arc-shaped sliding groove (153) faces upward, and a limit rod (154) is slidably arranged inside the arc-shaped sliding groove (153), a spring (155) is fixedly arranged on the limit rod (154), and the other end of the spring (155) is fixedly arranged on an end of the vertical rod (151) away from the horizontal rod (152).

6. The image recognition-based alarm device according to claim 1, characterized in that: An outer frame (16) is rotatably mounted on the outside of the mounting frame (2), a motor box (17) is mounted on the top of the outer frame (16), a third rotating motor (18) is arranged inside the motor box (17), and an output end of the third rotating motor (18) rotates out of the motor box (17) and is fixedly connected to the top of the outer frame (16).

7. An alarm device based on image recognition as claimed in claim 6, characterized in that: A closed disc (19) is installed on the top of the motor box (17), a fixed disc (20) is arranged above the closed disc (19), an electric push rod (21) is arranged at the bottom of the fixed disc (20), and the output end of the electric push rod (21) is fixedly arranged on the top of the closed disc (19). A smoke sensor is fixedly installed on the detector body (1), and the output end of the smoke sensor is electrically connected to the input end of the electric push rod (21).

8. The image recognition-based alarm device according to claim 7, characterized in that: The detector body (1) comprises a fire prevention camera, an alarm system and an infrared flame spectrum detector. The fire prevention camera and the infrared flame spectrum detector are used to collect dual images in real time, and after comprehensive judgment and recognition of the fire situation image, an alarm is issued through the alarm system.

9. An alarm device based on image recognition as claimed in claim 8, characterized in that: The outside of the closed disc (19) is adsorbed with a fireproof cover (22) by an electromagnet, the inner wall of the fireproof cover (22) is provided with a plurality of vertical grooves (23), the outer arc surface of the closed disc (19) is provided with a plurality of protrusions, and the protrusions are slidably arranged with the vertical grooves (23); the output end of the detector body (1) is electrically connected to the input end of the electromagnet.

10. An alarm device based on image recognition as claimed in claim 9, characterized in that: A top fixing seat (24) is fixedly provided at the top end of the fixed disc (20), and an ear plate (25) is fixedly installed in the circumferential direction of the top fixing seat (24).

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