Intelligent access control device for dormitory hall of big campus and use method of intelligent access control device

Abstract

The invention belongs to the field of entrance guard of halls, particularly relates to an intelligent entrance guard device for a dormitory hall of a large campus and a use method thereof, and aims to solve the problem that the personnel evacuation efficiency and safety are affected due to the fact that a gate cannot be opened in time when a disaster occurs as the gate cannot be opened in time when the conventional device cannot enable the gate to be in a normally open state under emergency conditions such as a fire or an earthquake. According to the scheme, the anti-theft door comprises a door frame, and an electromagnetic lock is fixedly arranged at the position, located in the center, of the rear side of the door frame; an on-off mechanism is arranged on the electromagnetic lock and used for controlling on-off of power of the electromagnetic lock. Through the arrangement of the on-off mechanism, when a fire disaster or an earthquake comes, the electromagnetic lock can be powered off, and the gate is in a normally open state, so that the electromagnetic lock power supply is automatically cut off in an emergency situation to ensure that the gate is opened in time, and the personnel evacuation efficiency and safety are greatly improved; the casualty risk caused by the fact that the gate cannot be opened in time when disasters occur is effectively reduced.

Description

Technical Field

[0001] This invention relates to the field of lobby access control technology, and in particular to an intelligent access control device for the lobby of a large campus dormitory and its usage method. Background Technology

[0002] The dormitory entrances on the university campus are equipped with intelligent access control devices. These devices aim to accurately control access permissions through diverse verification methods such as facial recognition, card swiping, and remote authorization, effectively preventing unauthorized entry and ensuring the safety of students' personal safety and property. Simultaneously, they enable 24-hour real-time monitoring, automatic alarms for abnormal behavior, and automatic statistics on dormitory return data, improving dormitory management efficiency and response speed. Furthermore, the data tracking and traceability functions strengthen campus security governance capabilities, ultimately creating a safe, intelligent, and convenient dormitory living environment.

[0003] Currently, existing smart access control devices in university dormitory lobbies typically have routine access control management functions. While they ensure dormitory safety and order to a certain extent, they cannot quickly de-energize the electromagnetic lock and keep the door open in emergencies such as fires or earthquakes. This can lead to difficulties in evacuation efficiency and safety during disasters due to the inability to open the door in time, increasing the risk of casualties.

[0004] To address the aforementioned problems, this invention proposes an intelligent access control device for dormitory lobbies on a large campus and its usage method, which solves the problems mentioned above. Summary of the Invention

[0005] This invention provides an intelligent access control device for the entrance hall of a large campus dormitory and its usage method, which solves the shortcomings of existing technologies that cannot keep the door open in emergency situations such as fires or earthquakes, which may affect the efficiency and safety of personnel evacuation and increase the risk of casualties when the door cannot be opened in time during a disaster.

[0006] This invention provides the following technical solution:

[0007] A smart access control device for dormitory lobbies on a large campus includes:

[0008] A door frame has two large doors symmetrically arranged on its inner side. A suction plate is fixedly installed on the side of the two large doors that are close to each other. An electromagnetic lock is fixedly installed at the center of the rear side of the door frame. A socket is installed on the top of the electromagnetic lock. A plug can be detachably inserted into the socket. Multiple electrical contacts are electrically provided on the bottom wall of the socket. Multiple electrical contact pieces are electrically provided on the bottom of the plug. The multiple electrical contacts and multiple electrical contact pieces can be detachably electrically connected.

[0009] The suction plate is equipped with a buffer mechanism, which is used to buffer and reduce rigid collisions when the door is closed. The electromagnetic lock is equipped with an on / off mechanism, which is used to control the on / off of the electromagnetic lock's power.

[0010] In one possible design, the buffer mechanism includes a groove formed in the middle of the suction plate, a fixed seat fixedly disposed on one side of the groove, a sliding sleeve slidably disposed through one side of the fixed seat, a damper fixedly disposed inside the fixed seat, the piston end of the damper being fixedly connected to the inner wall of the sliding sleeve, a spring being sleeved on the outside of the damper, the two ends of the spring being fixedly connected to the inner wall of the fixed seat and the inner side of the sliding sleeve respectively through spring seats, a vertical plate being fixedly disposed on the outside of the sliding sleeve, and a rubber pad being embedded in the outside of the vertical plate.

[0011] In one possible design, the switching mechanism includes a cover covering the socket and plug. The same rotating rod is rotatably mounted on both sides of the inner wall of the cover. A linkage frame is fixedly mounted on the outside of the rotating rod. The front end of the linkage frame is rotatably mounted on both sides of the plug. A stop frame is fixedly mounted at the bottom of the other end of the linkage frame. A rotating ring is rotatably mounted on the inner side of the linkage frame above the stop frame. An electric actuator is embedded inside the cover. The output end of the electric actuator is fixedly connected to the rotating ring.

[0012] In one possible design, the socket has a latch on one side, and the plug is fixedly provided with a latch block on one side of the latch. The latch block is adapted to the latch and can be disengaged and engaged. The abutment can be disengaged and engaged with the latch block.

[0013] In one possible design, a fixing frame is fixedly installed on the front side of the door frame, a fan-shaped toothed plate is rotatably installed on the inner side of one end of the fixing frame, and a camera is fixedly installed on one side of the fan-shaped toothed plate. The camera is electrically connected to the electromagnetic lock.

[0014] In one possible design, a frame is fixedly mounted on one side of the fixing bracket, and a pin is slidably mounted on the front side of the frame. The pin can be disengaged and inserted into the tooth groove of the fan-shaped toothed plate. A slide rod is slidably mounted inside the frame, and the front end of the slide rod is fixedly connected to the pin. A lever is fixedly mounted on the rear end of the slide rod outside the frame. A second spring is sleeved on the outside of the slide rod, and the two ends of the second spring are fixedly connected to the rear side of the pin and the inner wall of the frame respectively through spring seats.

[0015] In one possible design, an infrared sensor is embedded in the front side of the door frame below the fixing bracket, and lighting lamps are fixedly installed on both sides of the front side of the door frame at the infrared sensor. The infrared sensor and the lighting lamps are electrically connected.

[0016] In one possible design, two door closers are symmetrically fixedly installed on the rear side of the door frame, and the connecting rods of the two door closers are respectively fixedly connected to the inner side of the two doors. Door handles are fixedly installed on the inner and outer sides of the two doors.

[0017] A method for using an intelligent access control device in the lobby of a large campus dormitory includes the following steps:

[0018] S1: When a person approaches the dormitory entrance and stands in front of the camera, the camera captures the person's facial information. (When a person enters at night, the infrared sensor detects the person's approach and transmits the signal to the lighting, which automatically turns on to illuminate the entrance area, making it easier for the camera to capture the person's facial information.) The data is also transmitted to the access control controller. The access control controller compares and verifies the captured facial information. If the verification is successful, it proceeds to the next step. If the verification fails, the door remains locked. After the identity verification is successful, the access control controller cuts off the power to the electromagnetic lock, and the electromagnetic lock loses its magnetism and no longer attracts the suction plate.

[0019] S2: At this time, the person holds the doorknob and pulls it to open the door (the door drives the linkage to rotate the transmission gear inside the door closer, driving the rack plunger to move to the right. During this process, the spring inside is compressed, and the hydraulic oil in the right chamber is also pressurized. The one-way valve ball on the left side of the plunger opens under the action of oil pressure. The hydraulic oil in the right chamber flows to the left chamber through the one-way valve. Under the action of the door closer), the person can smoothly enter the dormitory (after entering the dormitory lobby, due to the compression of the spring during the opening process, the accumulated elastic potential energy is released, pushing the plunger to the left, driving the transmission gear and the door closer linkage to rotate, so that the door closes. During the spring release process, due to the compression of the hydraulic oil in the left chamber of the door closer, the one-way valve is closed. The hydraulic oil can only flow out through the gap between the housing and the plunger, and return to the right chamber through the small hole on the plunger and the two flow channels equipped with throttle valve cores).

[0020] S3: When the door closes under the action of the door closer, the suction plate on the door approaches the electromagnetic lock. During the closing process, the rubber pad on the vertical plate first contacts the electromagnetic lock, which plays an initial buffering role. The inertial force generated when the door closes causes the vertical plate to push the sliding sleeve to move backward on the fixed seat. The movement of the sliding sleeve compresses the spring and pushes the piston end of the damper to slide inward, further absorbing and reducing the impact force when the door closes, reducing the damage of rigid collision to the door and electromagnetic lock. After the buffer is obtained, the access control controller turns on the power of the electromagnetic lock, so that the electromagnetic lock restores its magnetic force to attract the suction plate, thereby locking the door.

[0021] S4: When the fire or earthquake alarm detects an abnormality, it immediately issues an alarm signal. At this time, the controller or microcontroller inside the alarm transmits the signal to the electric actuator (the controller or microcontroller inside the alarm is responsible for receiving signals from the fire or earthquake alarm. The microcontroller receives, decodes, and processes these signals to determine whether an emergency has occurred. If the microcontroller determines that an emergency has occurred, it will output corresponding control signals through its I / O ports. These control signals are usually level signals or PWM (pulse width modulation) signals, used to control the start, stop, and other actions of the electric actuator). After receiving the alarm signal, the output end of the electric actuator extends and pushes the rear side of the linkage frame to rotate downward around the rotating rod through the rotating ring. The rotation of the linkage frame causes the abutment to push the locking block to disengage from the locking slot. While the rear side of the linkage frame rotates downward around the rotating rod, the front side of the linkage frame rotates upward around the rotating rod, causing the plug to move upward inside the socket, so that the electrical contact at the bottom of the plug disengages from the electrical contact inside the socket, causing the electromagnetic lock to be de-energized and stop working, keeping the door in the open state for easy evacuation.

[0022] S5: When the camera angle needs to be adjusted, move the lever. The lever moves the slide bar backward. The movement of the slide bar causes the pin to disengage from the toothed groove of the fan-shaped toothed plate, releasing the fixation of the camera angle. Then, slowly rotate the camera to adjust its shooting angle. During the rotation, you can stop at any time as needed to observe the shooting effect of the camera. When the shooting angle reaches the appropriate position, release the lever. At this time, the second spring pushes the pin into the toothed groove of the fan-shaped toothed plate through its own elasticity, completing the fixation of the camera angle.

[0023] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit the invention.

[0024] The beneficial effects of this invention are as follows:

[0025] The present invention, through the setting of the buffer mechanism, can effectively absorb and disperse external impact force or vibration energy, reduce the direct impact and damage to equipment or structure, thereby significantly improving the stability of equipment operation, extending its service life, reducing the risk of failure caused by impact, ensuring the safe and reliable operation of the overall system, and bringing significant economic benefits and use value.

[0026] In this invention, by setting up a switching mechanism, when a fire or earthquake occurs, the electrical contacts in the plug and socket can be quickly disconnected, the electromagnetic lock is de-energized, and the door is kept in a normally open state. This enables the electromagnetic lock to be automatically cut off in an emergency to ensure the door can be opened in time, greatly improving the efficiency and safety of personnel evacuation and effectively reducing the risk of casualties caused by the door not being able to be opened in time during a disaster. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall external structure of an intelligent access control device for a dormitory lobby on a large campus, provided in an embodiment of the present invention.

[0028] Figure 2 This is a schematic diagram of the overall internal structure of an intelligent access control device for a dormitory lobby on a large campus, provided in an embodiment of the present invention.

[0029] Figure 3 This is a schematic diagram of the electromagnetic lock and suction plate separation structure of an intelligent access control device for a dormitory lobby in a large campus, provided in an embodiment of the present invention.

[0030] Figure 4 This is a cross-sectional enlarged structural diagram of the suction plate, buffer mechanism, and fixing seat of an intelligent access control device for a dormitory lobby in a large campus, provided in an embodiment of the present invention.

[0031] Figure 5 This is a schematic diagram of the socket and plug separation and partially enlarged structure of an intelligent access control device for a dormitory lobby on a large campus, provided in an embodiment of the present invention.

[0032] Figure 6 This is a cross-sectional view and enlarged structural schematic diagram of the cover of an intelligent access control device for a dormitory lobby in a large campus, provided in an embodiment of the present invention;

[0033] Figure 7 This is a schematic diagram of the mounting frame and a partially enlarged structure of an intelligent access control device for a large campus dormitory lobby, provided in an embodiment of the present invention.

[0034] Figure label:

[0035] 1. Door frame; 2. Door; 3. Door handle; 4. Electromagnetic lock; 5. Suction plate; 501. Groove; 6. Fixing base; 7. Sliding sleeve; 8. Vertical plate; 801. Rubber pad; 9. Damper; 10. Spring 1; 11. Socket; 12. Bayonet; 13. Electrical contact; 14. Plug; 15. Cover; 16. Locking block; 17. Rotating rod; 18. Linkage frame; 19. Brake frame; 20. Rotary ring; 21. Electric push rod; 22. Fixing frame; 23. Sector toothed plate; 24. Frame; 25. Sliding rod; 26. Pin block; 27. Toggle block; 28. Spring 2; 29. ​​Camera; 30. Infrared detector; 31. Lighting lamp; 32. Door closer. Detailed Implementation

[0036] The embodiments of the present invention will now be described with reference to the accompanying drawings.

[0037] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection" and "installation" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. Furthermore, "connection" can be a direct connection or an indirect connection through an intermediate medium. "Fixed" means that the devices are connected to each other and their relative positional relationship remains unchanged after the connection. The directional terms mentioned in the embodiments of the present invention, such as "inner," "outer," "top," and "bottom," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention.

[0038] Example 1

[0039] Reference Figure 1-7 A smart access control device for the lobby of a large campus dormitory includes:

[0040] The device includes a door frame 1, a door 2, an electromagnetic lock 4, a buffer mechanism, an on / off mechanism, a camera 29, an infrared sensor 30, a lighting lamp 31, and a door closer 32. The door frame 1 serves as the supporting frame for the entire device and is fixedly installed on the wall of the dormitory lobby. The two doors 2 are symmetrically rotated and positioned inside the door frame 1 to facilitate personnel entry and exit. The electromagnetic lock 4 is fixedly installed at the center of the rear side of the door frame 1 and is used to cooperate with the suction plate 5 on the door 2 to lock and open the door.

[0041] A buffer mechanism is installed on the suction plate 5 to buffer the door 2 when it is closed, reducing the damage to the door and electromagnetic lock 4 caused by rigid collisions. It includes a groove 501 in the middle section of the suction plate 5. A fixed seat 6 is fixedly installed on one side of the inner wall of the groove 501. A sliding sleeve 7 is slidably installed through one side of the fixed seat 6. A damper 9 is fixedly installed inside the fixed seat 6. The piston end of the damper 9 is fixedly connected to the inner wall of the sliding sleeve 7. A spring 10 is sleeved on the outside of the damper 9. Both ends of the spring 10 are fixedly connected to the inner wall of the fixed seat 6 and the inner side of the sliding sleeve 7 respectively through spring seats. A vertical plate 8 is fixedly installed on the outside of the sliding sleeve 7. A vertical plate 8 is embedded on the outside of the vertical plate 8. When the door 2 is opened and closed by the door closer 32, the suction plate 5 on the door 2 moves closer to the electromagnetic lock 4. The rubber pad 801 on the vertical plate 8 first contacts the electromagnetic lock 4, which plays a preliminary buffering role. The inertial force generated when the door 2 closes causes the vertical plate 8 to push the sliding sleeve 7 to move backward on the fixed seat 6. At this time, the piston end of the damper 9 is pushed to slide inward, and the spring 10 is also compressed, thereby absorbing and reducing the impact force when the door 2 closes. This effectively reduces the rigid collision between the door 2 and the electromagnetic lock 4, extends the service life of the equipment, and also reduces noise.

[0042] A switching mechanism is installed on the electromagnetic lock 4 to control the power supply to the electromagnetic lock 4. A cover 15 is fixedly installed on top of the electromagnetic lock 4 and covers the socket 11 and plug 14. A rotating rod 17 is rotatably mounted on both sides of the inner wall of the cover 15. A linkage frame 18 is fixedly mounted outside the rotating rod 17. The front end of the linkage frame 18 is rotatably mounted on both sides of the plug 14. A stop frame 19 is fixedly mounted at the bottom of the other end of the linkage frame 18. A rotating ring 20 is rotatably mounted on the inner side of the linkage frame 18 above the stop frame 19. An electric push rod 21 (electrically connected to the fire and earthquake alarm) is embedded inside the cover 15. The output end of the electric push rod 21 is fixedly connected to the rotating ring 20. A bayonet 12 is opened on one side of the socket 11. A locking block 16 is fixedly mounted on one side of the plug 14 near the bayonet 12. The locking block 16 is compatible with the bayonet 12 and can disengage. The plug 14 is inserted into the socket 11. When the abutment 19 and the locking block 16 are in contact, in the event of a fire or earthquake, the controller or microcontroller inside the alarm transmits a signal to the electric push rod 21. The output end of the electric push rod 21 extends and pushes the rear side of the linkage frame 18 to rotate downward around the rotating rod 17 through the rotating ring 20. At this time, the abutment 19 located below pushes the locking block 16 in contact with the socket 11 to move inward, so that the locking block 16 disengages from the locking slot 12. At the same time, the front side of the linkage frame 18 rotates upward around the rotating rod 17, causing the plug 14 to move upward inside the socket 11, so that the electrical contact at the bottom of the plug 14 disengages from the electrical contact 13 inside the socket 11, so that the electromagnetic lock 4 is de-energized and stops working, thereby keeping the door 2 in the normally open state, which facilitates the evacuation of personnel. It can quickly cut off the power of the electromagnetic lock 4 in an emergency, ensuring that personnel can evacuate quickly and safely.

[0043] A fixing bracket 22 is fixedly installed on the front side of the door frame 1. A fan-shaped toothed plate 23 is rotatably installed on the inner side of one end of the fixing bracket 22. A camera 29 is fixedly installed on one side of the fan-shaped toothed plate 23. An electromagnetic lock 4 is electrically connected to the corresponding input terminal of the access control controller through the corresponding signal line on the plug 14. The electromagnetic lock 4 is electrically connected to the camera 29 through the access control controller. A frame 24 is fixedly installed on one side of the fixing bracket 22. A sliding pin 26 is embedded in the front side of the frame 24. The pin 26 can be disengaged and inserted into the tooth groove of the fan-shaped toothed plate 23. A sliding rod 25 is slidably installed inside the frame 24. The front end of the sliding rod 25 is fixedly connected to the pin 26. A lever 27 is fixedly installed at the rear end of the sliding rod 25 outside the frame 24. A second spring 28 is sleeved on the outside of the sliding rod 25. The two ends of the second spring 28 are respectively connected to the rear side of the pin 26 and the inner wall of the frame 24 through spring seats. The camera 29 is fixedly connected. When the angle of the camera 29 needs to be adjusted, the toggle block 27 is moved. When the toggle block 27 is pulled, it causes the slide bar 25 to move backward. As the slide bar 25 moves backward, it causes the pin block 26 to disengage from the tooth groove of the fan-shaped toothed plate 23, thus releasing the fixation of the camera 29 angle. Then, the camera 29 is slowly rotated to adjust its shooting angle. During the rotation, it can be stopped at any time as needed to observe the shooting effect of the camera 29. When the shooting angle reaches the appropriate position, the toggle block 27 is released. At this time, the spring 28 will push the pin block 26 into the tooth groove of the fan-shaped toothed plate 23 through its own elasticity, thus fixing the angle of the camera 29. This allows the management personnel to adjust the shooting angle of the camera 29 according to actual needs, ensuring that the facial information of the personnel can be accurately captured, thereby improving the security and reliability of the access control system.

[0044] Example 2

[0045] Based on Example 1, Example 2 also includes

[0046] Reference Figure 1-3 A smart access control device for the lobby of a large campus dormitory includes:

[0047] An infrared sensor 30 is embedded in the front side of the door frame 1 below the fixing bracket 22. Lighting lamps 31 are fixed on both sides of the infrared sensor 30 on the front side of the door frame 1. The infrared sensor 30 and the lighting lamps 31 are electrically connected. When a person enters at night, the infrared sensor 30 detects the person approaching and transmits a signal to the lighting lamps 31, causing the lighting lamps 31 to turn on and illuminate the lobby area, making it convenient for the camera 29 to capture the person's facial information. This fully considers the needs of nighttime use and improves the applicability and convenience of the access control system in nighttime environments. The positive terminal (+12VDC) of the infrared sensor 30 is connected to the positive terminal of the power supply, and the negative terminal (GND) is connected to the negative terminal of the power supply. The signal output terminal (such as COM and NO terminals) of the infrared sensor 30 is connected to the input terminal of the relay control module, and the output terminal of the relay control module is connected to the power line of the lighting lamps 31. The lighting lamps 31 are turned on by closing the relay contacts.

[0048] Two door closers 32 are symmetrically fixedly installed on the rear side of the door frame 1. The connecting rods of the two door closers 32 are fixedly connected to the inner sides of the two doors 2 respectively. When a person opens the door 2 and enters the dormitory, the transmission gear inside the door closer 32 rotates, driving the rack plunger to move to the right. During this process, the internal spring is compressed, and the hydraulic oil in the right chamber is also pressurized. The one-way valve ball on the left side of the plunger opens under the action of oil pressure, and the hydraulic oil in the right chamber flows to the left chamber through the one-way valve. When a person enters the dormitory lobby, the elastic potential energy accumulated by the spring during the opening process is released, pushing the plunger to the left, driving the transmission gear and the connecting rod of the door closer 32 to rotate, so that the door closes. During the spring release process, the hydraulic oil in the left chamber of the door closer 32 is compressed, the one-way valve is closed, and the hydraulic oil can only flow out through the gap between the housing and the plunger, and then flow back to the right chamber through the small hole on the plunger and the two flow channels equipped with throttle valve cores, ensuring that the door 2 can automatically close after a person enters, maintaining the safety of the lobby.

[0049] However, as is well known to those skilled in the art, the working principles and wiring methods of the electromagnetic lock 4, socket 11, plug 14, electric push rod 21, camera 29, infrared probe 30 and lighting lamp 31 are commonplace and belong to conventional means or common knowledge. They will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience.

[0050] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0051] The working principle and usage process of this technical solution are as follows:

[0052] When a person approaches the dormitory entrance and stands in front of camera 29, camera 29 captures the person's facial information. (When a person enters at night, infrared sensor 30 detects the person's approach and transmits a signal to lighting 31, which automatically turns on to illuminate the entrance area, making it easier for camera 29 to capture the person's facial information.) The data is also transmitted to the access control controller. The access control controller compares and verifies the captured facial information. If the verification is successful, it proceeds to the next step. If the verification fails, the door 2 remains locked. After the identity verification is successful, the access control controller cuts off the power to the electromagnetic lock 4, and the electromagnetic lock 4 loses its magnetism and no longer attracts the suction plate 5.

[0053] At this time, the person holds the door handle 3 and pulls it to open the door 2 (the door 2 drives the linkage to rotate the transmission gear inside the door closer 32, driving the rack plunger to move to the right. During this process, the spring inside is compressed, and the hydraulic oil in the right chamber is also pressurized. The one-way valve ball on the left side of the plunger opens under the action of oil pressure. The hydraulic oil in the right chamber flows to the left chamber through the one-way valve. Under the action of the door closer 32), the person can smoothly enter the dormitory (after entering the dormitory lobby, because the spring is compressed during the opening process, the accumulated elastic potential energy is released, pushing the plunger to the left, driving the transmission gear and the door closer linkage to rotate, so that the door closes. During the spring release process, because the hydraulic oil in the left chamber of the door closer 32 is compressed, the one-way valve is closed. The hydraulic oil can only flow out through the gap between the housing and the plunger, and return to the right chamber through the small hole on the plunger and the two flow channels equipped with throttle valve cores).

[0054] When the door 2 is closed by the door closer 32, the suction plate 5 on the door 2 moves closer to the electromagnetic lock 4. During the closing process of the door 2, the rubber pad 801 on the vertical plate 8 first contacts the electromagnetic lock 4, which plays a preliminary buffering role. The inertial force generated when the door 2 closes causes the vertical plate 8 to push the sliding sleeve 7 to move backward on the fixed seat 6. The movement of the sliding sleeve 7 compresses the spring 10 and pushes the piston end of the damper 9 to slide inward, further absorbing and reducing the impact force when the door 2 closes, reducing the damage of rigid collision to the door body and the electromagnetic lock 4. After the buffering is obtained, the access control controller turns on the power of the electromagnetic lock 4, so that the electromagnetic lock 4 restores its magnetic force to attract the suction plate 5, thereby locking the door 2.

[0055] When a fire or earthquake alarm detects an abnormality, it immediately issues an alarm signal. At this time, the internal controller or microcontroller transmits the signal to the electric actuator 21. (The internal controller or microcontroller receives signals from the fire or earthquake alarm. The microcontroller receives, decodes, and processes these signals to determine if an emergency has occurred. If the microcontroller determines an emergency has occurred, it outputs corresponding control signals through its I / O ports. These control signals are typically level signals or PWM (pulse width modulation) signals, used to control the start and stop of the electric actuator 21.) After receiving the alarm signal, the push rod 21 extends its output end and pushes the rear side of the linkage frame 18 to rotate downward around the rotating rod 17 through the rotating ring 20. The rotation of the linkage frame 18 drives the abutment 19 to push the locking block 16 to disengage from the locking slot 12. When the rear side of the linkage frame 18 rotates downward around the rotating rod 17, the front side of the linkage frame 18 rotates upward around the rotating rod 17, causing the plug 14 to move upward inside the socket 11, so that the electrical contact piece at the bottom of the plug 14 disengages from the electrical contact 13 inside the socket 11, causing the electromagnetic lock 4 to be de-energized and stop working, so that the door 2 is in the normally open state, which facilitates the evacuation of personnel.

[0056] When the angle of camera 29 needs to be adjusted, move the lever 27. The lever 27 moves the slide bar 25 backward. The movement of the slide bar 25 causes the pin 26 to disengage from the tooth groove of the fan-shaped toothed plate 23, releasing the fixation of the angle of camera 29. Then slowly rotate camera 29 to adjust its shooting angle. During the rotation, you can stop at any time as needed to observe the shooting effect of camera 29. When the shooting angle reaches the appropriate position, release the lever 27. At this time, spring 28 pushes the pin 26 into the tooth groove of the fan-shaped toothed plate 23 through its own elasticity, completing the fixation of the angle of camera 29.

[0057] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. In the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A smart access control device for the lobby of a large campus dormitory, characterized in that, include: A door frame (1) has two large doors (2) symmetrically rotated on its inner side. A suction plate (5) is fixedly installed on the side of the two large doors (2) that are close to each other. An electromagnetic lock (4) is fixedly installed at the center of the rear side of the door frame (1). A socket (11) is installed on the top of the electromagnetic lock (4). A plug (14) can be detached and plugged into the inside of the socket (11). Multiple electrical contacts (13) are electrically provided on the bottom wall of the socket (11). Multiple electrical contact pieces are electrically provided on the bottom of the plug (14). The multiple electrical contacts (13) and the multiple electrical contact pieces can be detached and electrically connected. The suction plate (5) is provided with a buffer mechanism, which is used to buffer and reduce rigid collisions when the door (2) is closed. The electromagnetic lock (4) is provided with an on / off mechanism, which is used to control the on / off of the power of the electromagnetic lock (4).

2. The intelligent access control device for a dormitory lobby on a large campus according to claim 1, characterized in that: The buffer mechanism includes a groove (501) in the middle section of the suction plate (5). A fixed seat (6) is fixedly provided on one side of the groove (501). A sliding sleeve (7) is slidably provided through one side of the fixed seat (6). A damper (9) is fixedly provided inside the fixed seat (6). The piston end of the damper (9) is fixedly connected to the inner wall of the sliding sleeve (7). A spring (10) is sleeved on the outside of the damper (9). The two ends of the spring (10) are fixedly connected to the inner wall of the fixed seat (6) and the inner side of the sliding sleeve (7) respectively through spring seats. A vertical plate (8) is fixedly provided on the outside of the sliding sleeve (7). A rubber pad (801) is embedded on the outside of the vertical plate (8).

3. The intelligent access control device for a dormitory lobby on a large campus according to claim 1, characterized in that: The switching mechanism includes a cover (15) covering the socket (11) and plug (14). The same rotating rod (17) is rotatably arranged on both sides of the inner wall of the cover (15). A linkage frame (18) is fixedly arranged on the outside of the rotating rod (17). The front end of the linkage frame (18) is rotatably arranged on both sides of the plug (14). A stop frame (19) is fixedly arranged at the bottom of the other end of the linkage frame (18). A rotating ring (20) is rotatably arranged on the inner side of the linkage frame (18) above the stop frame (19). An electric push rod (21) is embedded in the inside of the cover (15). The output end of the electric push rod (21) is fixedly connected to the rotating ring (20).

4. The intelligent access control device for a dormitory lobby on a large campus according to claim 3, characterized in that: The socket (11) has a slot (12) on one side. The plug (14) is fixedly provided with a locking block (16) on one side of the slot (12). The locking block (16) is adapted to the slot (12) and can be disengaged. The abutment (19) can be disengaged and attached to the locking block (16).

5. The intelligent access control device for a dormitory lobby on a large campus according to claim 1, characterized in that: A fixing frame (22) is fixedly installed on the front side of the door frame (1). A fan-shaped toothed plate (23) is rotatably installed on the inner side of one end of the fixing frame (22). A camera (29) is fixedly installed on one side of the fan-shaped toothed plate (23). The camera (29) is electrically connected to the electromagnetic lock (4).

6. The intelligent access control device for a dormitory lobby on a large campus according to claim 5, characterized in that: A frame (24) is fixedly installed on one side of the fixed frame (22). A pin (26) is slidably embedded in the front side of the frame (24). The pin (26) can be disengaged and inserted into the tooth groove of the fan-shaped toothed plate (23). A slide rod (25) is slidably installed inside the frame (24). The front end of the slide rod (25) is fixedly connected to the pin (26). A lever (27) is fixedly installed at the rear end of the slide rod (25) outside the frame (24). A second spring (28) is sleeved on the outside of the slide rod (25). The two ends of the second spring (28) are fixedly connected to the rear side of the pin (26) and the inner wall of the frame (24) respectively through spring seats.

7. The intelligent access control device for a dormitory lobby on a large campus according to claim 1, characterized in that: An infrared probe (30) is embedded in the front side of the door frame (1) below the fixing frame (22). Lighting lamps (31) are fixedly installed on both sides of the front side of the door frame (1) on the infrared probe (30). The infrared probe (30) and the lighting lamps (31) are electrically connected.

8. The intelligent access control device for a dormitory lobby on a large campus according to claim 1, characterized in that: Two door closers (32) are symmetrically fixedly installed on the rear side of the door frame (1). The connecting rods of the two door closers (32) are fixedly connected to the inner side of the two doors (2). Door handles (3) are fixedly installed on the inner and outer sides of the two doors (2).

9. A method for using an intelligent access control device in the lobby of a large campus dormitory, characterized in that, The intelligent access control device for a dormitory lobby on a large campus, as described in any one of claims 1-8, includes the following steps: S1: When a person approaches the dormitory entrance hall and stands in front of the camera (29), the camera (29) captures the person's facial information. When the person enters at night, the infrared probe (30) detects the person approaching and transmits the signal to the lighting (31). The lighting (31) automatically turns on to illuminate the entrance hall area, making it convenient for the camera (29) to capture the person's facial information and transmit the data to the access control controller. The access control controller compares and verifies the captured facial information. If the verification is successful, it proceeds to the next step. If the verification fails, the door (2) remains locked. After the identity verification is successful, the access control controller cuts off the power to the electromagnetic lock (4), and the electromagnetic lock (4) loses its magnetism and no longer attracts the suction plate (5). S2: At this time, the person holds the door handle (3) and pulls it to open the door (2). The door (2) drives the linkage to rotate, causing the transmission gear inside the door closer (32) to rotate and drive the rack plunger to move to the right. During this process, the spring inside is compressed, and the hydraulic oil in the right chamber is also pressurized. The one-way valve ball on the left side of the plunger opens under the action of oil pressure. The hydraulic oil in the right chamber flows to the left chamber through the one-way valve. Under the action of the door closer (32), the person can smoothly enter the dormitory. After entering the dormitory hall, the elastic potential energy accumulated by the spring being compressed during the opening process is released, pushing the plunger to the left, driving the transmission gear and the linkage of the door closer (32) to rotate, so that the door is closed. During the spring release process, the hydraulic oil in the left chamber of the door closer (32) is compressed, and the one-way valve is closed. The hydraulic oil can only flow out through the gap between the housing and the plunger, and flow back to the right chamber through the small hole on the plunger and the two flow channels equipped with throttle valve cores. S3: When the door (2) is closed by the door closer (32), the suction plate (5) on the door (2) approaches the electromagnetic lock (4). During the closing process of the door (2), the rubber pad (801) on the vertical plate (8) first contacts the electromagnetic lock (4) and plays a preliminary buffering role. The inertial force generated when the door (2) closes causes the vertical plate (8) to push the sliding sleeve (7) to move backward on the fixed seat (6). The movement of the sliding sleeve (7) compresses the spring (10) and pushes the piston end of the damper (9) to slide inward, further absorbing and slowing down the impact force when the door (2) closes, reducing the damage of rigid collision to the door body and the electromagnetic lock (4). After buffering, the access controller connects the power of the electromagnetic lock (4), so that the electromagnetic lock (4) restores its magnetic force to attract the suction plate (5), thereby locking the door (2). S4: When the fire or earthquake alarm detects an abnormal situation, it immediately issues an alarm signal. At this time, the controller or microcontroller inside the alarm transmits the signal to the electric actuator (21). (The controller or microcontroller inside the alarm is responsible for receiving signals from the fire or earthquake alarm. The microcontroller receives, decodes, and processes these signals to determine whether an emergency has occurred. If the microcontroller determines that an emergency has occurred, it will output corresponding control signals through its I / O ports. These control signals are usually level signals or PWM (pulse width modulation) signals, used to control the start, stop, and other actions of the electric actuator (21). After receiving the alarm signal, the electric actuator (21)... Its output end extends out and pushes the rear side of the linkage frame (18) to rotate downward around the rotating rod (17) through the rotating ring (20). The rotation of the linkage frame (18) drives the abutment frame (19) to push the block (16) to disengage from the latch (12). When the rear side of the linkage frame (18) rotates downward around the rotating rod (17), the front side of the linkage frame (18) rotates upward around the rotating rod (17), causing the plug (14) to move upward inside the socket (11), so that the electrical contact at the bottom of the plug (14) disengages from the electrical contact (13) inside the socket (11), so that the electromagnetic lock (4) is de-energized and stops working, so that the door (2) is in the normally open state, which facilitates the evacuation of personnel. S5: When it is necessary to adjust the angle of the camera (29), move the lever (27). The lever (27) drives the slide bar (25) to move backward. The movement of the slide bar (25) causes the pin (26) to disengage from the tooth groove of the fan-shaped toothed plate (23), releasing the fixation of the angle of the camera (29). Then slowly rotate the camera (29) to adjust its shooting angle. During the rotation, you can stop at any time as needed to observe the shooting effect of the camera (29). When the shooting angle reaches the appropriate position, release the lever (27). At this time, the second spring (28) pushes the pin (26) into the tooth groove of the fan-shaped toothed plate (23) through its own elastic principle, thus completing the fixation of the angle of the camera (29).

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