Security and protection monitoring system based on Internet of Things data

Abstract

The invention relates to the technical field of security and protection monitoring equipment, in particular to a security and protection monitoring system based on Internet of Things data, which comprises a holder, a holder base, a camera support, shells, a shell cover and a rotating shaft, the holder is mounted on the holder base, the shells are mounted on two sides of the holder, the camera support is mounted on the holder through the rotating shaft, and the camera support is mounted on the holder through the rotating shaft. The shell is provided with a shell cover at the joint of the rotating shaft, two sides of the holder are provided with a pair of bearing devices, the bearing devices are used for sharing the weight of the camera and reducing the load of the motor, each bearing device comprises mounting holes formed in the periphery of the shell, and the rotating shaft is rotatably provided with a bearing force arm; and two springs are arranged in the shell. By arranging the bearing device, the extra gravity applied by the force arm in the operation process of the motor in the vertical direction of the holder is reduced, and the extra load borne by the motor of the holder is shared, so that the purposes of protecting the motor and prolonging the service life of the holder are achieved.

Description

Technical Field

[0001] This invention relates to the field of security monitoring equipment technology, specifically to a security monitoring system based on Internet of Things (IoT) data. Background Technology

[0002] The Internet of Things (IoT) security monitoring system uses fiber optics, coaxial cables, or microwaves to transmit video signals within a closed loop, forming a complete and independent system from camera to image display and recording. It can reflect the monitored object in real time, vividly, and realistically, greatly extending the observation distance of the human eye and expanding its capabilities. It can replace manual monitoring for extended periods in harsh environments, allowing people to see everything actually happening at the monitored site and record it via video recorder. Simultaneously, the alarm system devices trigger alarms for unauthorized intrusions, and the generated alarm signal is input to the alarm host, which triggers the monitoring system to record the video.

[0003] To achieve comprehensive monitoring, most existing surveillance cameras use pan-tilt units (PTZs) to mount the camera, allowing for horizontal and vertical rotation and thus increasing the monitoring range. However, for bullet cameras, especially outdoor PTZs, the camera's center of gravity doesn't align with the rotation axis when the PTZ motor drives the arm from vertical to horizontal. This means that when the camera is horizontal, the vertical motor bears the entire weight of the camera and the arm, whereas when the arm is vertical, this weight is borne by the rotation axis. Over time, this uneven force causes wear and tear on the internal gears, increasing the motor's load and eventually leading to burnout. This results in the PTZ losing its vertical movement capability first after prolonged use. Using a larger motor would reduce the space available for other internal electronic components, affecting heat dissipation and increasing the cost.

[0004] To address this, an IoT-based security monitoring system is proposed. By sharing the weight of the camera, the additional force exerted by the lever arm during the operation of the vertical motor is reduced, thereby protecting the motor and extending the lifespan of the pan-tilt unit. Summary of the Invention

[0005] The purpose of this invention is to provide an IoT-based security monitoring system that uses a load-bearing device to distribute the weight of the camera and reduce the additional gravity applied by the lever arm during the operation of the vertical motor, thereby solving the problems mentioned in the background art.

[0006] Preferably, the pan-tilt unit has housings installed on both sides. The camera bracket is mounted on the pan-tilt unit via a rotating shaft. A housing cover is provided at the connection point of the rotating shaft. A pair of load-bearing devices are installed on both sides of the pan-tilt unit. These load-bearing devices are used to distribute the weight of the camera and reduce the motor load. Each load-bearing device includes mounting holes around the perimeter of the housing. A screw passes through the four mounting holes and is fixedly connected to the pan-tilt unit housing. A rotating shaft, made of high-quality carbon steel, is located at the center of the housing. A housing cover is installed on the housing. A load-bearing arm is rotatably mounted on the rotating shaft. Two springs are installed inside the housing, and a spring fixing block is movably installed inside the housing. The two springs are respectively positioned... On both sides of the spring fixing block, the load-bearing arm is connected to the camera bracket. Both ends of the spring are fixedly connected to the load-bearing arm and the spring fixing block, respectively. Spring grooves are provided on both the load-bearing arm and the spring fixing block, and the spring is located within these grooves. The spring grooves facilitate adjustment of the spring's trajectory during operation, preventing the spring from bending due to the force angle not being perpendicular to the spring end face when compressed by the load-bearing arm, thus ensuring good load-bearing performance. When the load-bearing arm moves from a perpendicular angle to a horizontal angle, the camera weight will gradually tend towards horizontality, gradually shifting from the rotating bearing to the motor output bearing. During prolonged operation, the gimbal motor may experience uneven force distribution... This causes wear and scuffing of the internal gears, leading to increased load on the motor drive and ultimately causing the motor to burn out due to excessive load. Consequently, the pan-tilt unit loses its vertical movement capability first after prolonged use. By fixing the two ends of the spring to the load-bearing arm and the spring fixing block respectively, when the load-bearing arm moves from a perpendicular angle to a horizontal angle, the spring is compressed and applies a spring force to the load-bearing arm in the opposite direction of movement. This balances the camera's weight, reduces the burden on the pan-tilt motor, protects the internal gears, extends the motor's lifespan, and reduces maintenance costs. The outer shell has a limit opening with an opening angle of 130 degrees. The load-bearing arm is placed in the limit opening, when... When the vertical angle needs to be adjusted, the load-bearing arm drives the camera to rotate. Used in conjunction with the horizontal pan-tilt unit, the camera's monitoring range is sufficient to meet the monitoring needs from 0 to 130 degrees in practical applications. The load-bearing arm is equipped with a sliding ring that wraps around the outer casing. When the load-bearing arm moves, the sliding ring adheres tightly to the surface of the casing and rotates concentrically with the rotation axis. The sliding ring primarily protects the internal structure of the rotation area from external environmental influences. If the equipment is placed outdoors without the sliding ring's protection, rainwater, dust, branches, and other debris will fall into the equipment, jamming the rotation axis and affecting its operation. A balancing device is connected to the sliding ring, which increases the load-bearing capacity of the pan-tilt unit.

[0007] Preferably, an adjusting block is fixedly installed on the inner surface of the outer shell, and the adjusting block has multiple adjusting holes. A fixing hole one is opened in the center of the spring fixing block. The outer shell cover is detachably connected to the rotating shaft. A partition plate with a fan-shaped structure is installed between the outer shell cover and the load-bearing arm. The spring fixing block is located between the outer shell and the partition plate. Adjusting windows of the same size and shape are opened on both the outer shell cover and the partition plate. An adjusting rod is movably installed in the fixing hole one. The spring fixing block is slidably installed on the adjusting block, and the adjusting rod cooperates with the multiple adjusting holes. A dustproof plate is rotatably installed between the partition plate and the outer shell cover. A fixing hole two is opened on the dustproof plate. The adjusting rod is simultaneously movably installed inside both the fixing hole two and the fixing hole one. The spring fixing block inside the outer shell can be adjusted by rotating the adjusting rod. The position allows for adjustment of the spring pressure within the ranges of 0 to 90 degrees and 90 to 130 degrees, ensuring appropriate weight reduction when the camera bracket is loaded with cameras of different weights, and when the load-bearing arm moves to these two different ranges. The dustproof plates are slidably mounted on the outer cover and partitions. By setting the dustproof cover, the adjustable function of the equipment is ensured while preventing the entry of dust and rainwater, effectively preventing the possibility of rust and corrosion of the internal structure during long-term outdoor use. The outer cover is detachably connected to the rotating shaft. When the equipment malfunctions, the outer cover can be removed and the dustproof plates taken out. At this time, most of the internal structure is exposed, facilitating quick diagnosis of the fault without the need for complete disassembly.

[0008] Preferably, the balancing device includes a balance bar, with a counterweight box rotatably mounted at the end of the balance bar. The counterweight box can hold counterweight blocks for balancing the camera's weight. The counterweight box is externally covered with a dustproof shell and a dust cover. This dustproof shell prevents corrosion of the counterweight blocks or jamming of connectors due to moisture or sandstorms in harsh weather conditions. An adjustable clamp is installed on the counterweight box to fix the counterweight blocks, allowing for the use of different weights of counterweight blocks to accommodate different camera weights. Compared to a single load-bearing arm, which may still overload the motor when handling heavier cameras, the addition of a balancing device allows the invention to support heavier cameras when necessary, ensuring product adaptability while preventing motor burnout. When the load-bearing arm moves, the counterweight blocks in the counterweight box remain perpendicular to the ground due to gravity. Using the rotating shaft as a fulcrum reduces the load on the motor when the camera rotates upwards, thus protecting the equipment.

[0009] Preferably, a pressure sensor is provided in the spring fixing block, and an LED display is installed on the surface of the pan-tilt unit. The pressure sensor is electrically connected to the LED display. When the load-bearing arm rotates and compresses the spring, the spring undergoes elastic deformation, generating elastic force that acts on the pressure sensor in the spring fixing block. The pressure sensor converts the spring pressure into an electrical signal and sends it to the LED display. At this time, the LED display converts the electrical signal into a digital display, realizing real-time monitoring of pressure changes during equipment movement and installation. This facilitates quick pressure adjustment when replacing surveillance cameras later and allows observation of whether the equipment is operating normally through the display after installation, eliminating the need for judgment based on experience or touch. This improves replacement efficiency while ensuring accuracy.

[0010] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0011] 1. By fixing the two ends of the spring to the spring groove and the spring fixing block respectively, when the load-bearing arm moves from an angle perpendicular to the ground to an angle horizontal to the ground, the spring is compressed and applies an elastic force to the load-bearing arm in the opposite direction of movement. This balances the weight of the camera, reduces the burden on the pan-tilt motor, protects the motor from overload due to excessive camera weight, extends the service life of the motor, and reduces maintenance costs.

[0012] 2. By connecting the pressure sensor to the LED display, real-time pressure changes can be observed during equipment movement and installation. This facilitates quick pressure adjustment when replacing surveillance cameras and allows users to monitor the equipment's operation after installation, eliminating the need for experience or touch. This ensures accuracy while improving replacement efficiency.

[0013] 3. By adding a balancing device, the present invention can carry heavier cameras when necessary, which takes into account the adaptability of the product while ensuring that the motor will not burn out. This reduces the final load on the motor and protects the equipment. The adjustable device, combined with counterweights of different weights, makes it applicable to models of different weights, thus broadening the application scenarios of the present invention. Attached Figure Description

[0014] Figure 1 This is an exploded view of the load-bearing device of the present invention;

[0015] Figure 2 This is a top view of the internal structure of the load-bearing device of the present invention;

[0016] Figure 3 This is a bottom view of the internal structure of the load-bearing device of the present invention;

[0017] Figure 4 This is a schematic diagram of the structure of the present invention;

[0018] Figure 5 This is a left view of the load-bearing arm of the present invention;

[0019] Figure 6 For the present invention Figure 5 Sectional view at point AA;

[0020] Figure 7 This is a right view of the load-bearing device of the present invention;

[0021] Figure 8 For the present invention Figure 7 Sectional view at point BB;

[0022] Figure 9 This is a partial sectional view of the load-bearing device of the present invention.

[0023] In the diagram: 1. Pan-tilt head; 2. Pan-tilt head base; 3. Camera bracket; 4. Housing; 5. Mounting hole; 6. Rotating shaft; 7. Load-bearing arm; 8. Adjusting rod; 9. Limiting port; 10. Sliding ring; 11. Spring; 12. Spring groove; 13. Spring fixing block; 14. Partition plate; 15. Dustproof plate; 16. Housing cover; 17. Adjusting block; 18. Adjusting hole; 19. Adjusting window; 20. Fixing hole two; 21. Fixing hole one; 22. Pressure sensor; 23. LED display; 24. Balance bar; 25. Counterweight box; 26. Dustproof housing; 27. Dustproof cover; 28. Adjustable clamp. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] Example 1, please refer to Figures 1 to 9 A security monitoring system based on IoT data, used for small and medium-sized cameras weighing less than 2.5kg, has the following technical solution:

[0026] A pair of load-bearing arms 7 are installed on both sides of the pan-tilt head 1. The load-bearing arms 7 are connected to a balance bar 24. A camera bracket 3 is fixedly installed between the load-bearing arms 7 by screws. The camera bracket 3 is located above the pan-tilt head 1. The outer shell 4 is a disc-shaped structure made of thickened steel. The bottom of the outer shell 4 has four mounting holes 5 for fixing to the pan-tilt head 1. Flat-head screws are used to pass through the four mounting holes 5 and fix them to the outer shell 4 of the pan-tilt head 1. A rotating shaft 6 is set in the center of the outer shell 4. The rotating shaft 6 is made of high-quality carbon steel. The load-bearing arms 7 are rotatably mounted on the rotating shaft 6. The camera bracket 3 has through holes for fixing the camera. The camera is fixed to the camera bracket 3 by screws and nuts. The outer shell 4 has a limiting port 9 with an opening angle of 0 to 130 degrees. The load-bearing arm 7 is placed in the limiting port 9 and has a sliding ring 10 that wraps around the outer ring of the outer shell 4. The load-bearing arm 7 has a spring groove 12. A spring fixing block 13 is movably installed inside the outer shell 4. The two ends of the spring 11 are fixedly connected to the spring groove 12 and the spring fixing block 13, respectively. A partition 14 is installed on the inner wall of the outer shell 4. The partition 14 has a fan-shaped structure with a sector opening angle of 220 degrees and is located on the left side of the load-bearing arm 7. A dustproof plate 15 is rotatably mounted. The dustproof plate 15 has a fan-shaped structure with a sector opening angle of 130 degrees. A second fixing hole 20 is provided on the dustproof plate 15. A housing 4 cover is fixedly mounted on the left side of the dustproof plate 15. Both the housing 4 cover and the partition plate 14 have adjustment windows 19 of the same size and shape. The dustproof plate 15 is rotatably mounted on a rotating shaft 6. An adjustment block 17 is fixedly mounted on the inner wall of the housing 4. The adjustment block 17 is located to the right of the spring fixing block 13. Three adjustment holes 18 are provided on the adjustment block 17. A first fixing hole 21 is provided in the center of the spring fixing block 13. An adjustment rod 8 is movably mounted in the second fixing hole 20. Rod 8 can pass through fixing hole 21 and be placed in adjustment hole 18. The outer shell 4 is circular with a through hole at the center. One end of the rotating shaft 6 has a threaded hole with a depth of 20mm. A pressure sensor 22 is installed in the spring fixing block 13. An LED digital display screen is installed on the surface of the gimbal 1. The pressure sensor 22 is electrically connected to the LED digital display screen. A balancing device is connected to the sliding ring 10. The balancing device includes a balance rod 24. The balance rod 24 has a hollow structure. A counterweight box 25 is rotatably installed at the end of the balance rod 24. A dustproof shell 26 is provided on the outside of the counterweight box 25. A dustproof cover 27 is installed on the dustproof shell 26.

[0027] Before starting work, mount the camera on the camera bracket 3, and then fix the camera bracket 3 between the two load-bearing arms 7 so that the two load-bearing arms 7 can rotate synchronously. After completion, mount the pan-tilt head 1 on the pan-tilt head base 2, keeping the pan-tilt head 1 horizontal with respect to the ground. At this time, first adjust the elasticity of the spring 11 within the range of 0 to 90 degrees. Slightly pull the adjusting rod 8 outward by hand. Stop when you feel something blocking it and you can't pull it out any further. Then, push the adjusting rod 8 upward in the opposite direction of the camera's movement to slowly place the camera horizontally. Observe the pressure value on the LED digital display and the force on the camera. When the elasticity of the camera can just maintain the horizontal direction, push the adjusting rod 8 inward into the adjusting hole 18 to secure it. At this point, the camera's weight when it is horizontal will be borne by the adjustment rod 8. After setting it, adjust the spring force of spring 11 within the range of 90 to 130 degrees. At this time, slowly push the camera from 90 degrees to 130 degrees with your hand, and adjust the adjustment rod 8 on the other side of the pan-tilt head 1 with your other hand. Similarly, first pull the adjustment rod 8 out of the adjustment hole 18, and then slowly push the adjustment rod 8 upward in the opposite direction of the camera's movement. Observe the pressure value on the LED digital display and the force on the camera. When the camera is at 130 degrees and is just pushed, observe the LED digital display and slightly withdraw some of the pushing force, because at this angle, most of the camera's weight is still borne by the rotating shaft 6. Applying excessive spring force will only have the opposite effect and cause the motor to bear additional resistance.

[0028] When starting work, power on pan-tilt unit 1 will initiate a self-test. After the self-test, use the controller to adjust the pan-tilt unit 1 up and down. Push the operating angle to the maximum and observe the LED digital display screen. Observe the camera's movement to a horizontal position. If the LED digital display screen shows that the elastic force is exactly equal to or slightly greater than the camera's own weight, it indicates that the load-bearing device is correctly set. Because the load-bearing arm 7 also has a certain weight, setting the elastic force to no more than 5% of the camera's own weight will achieve a balancing effect. After setting, pan-tilt unit 1 and its monitoring equipment can be installed as needed. Position; When the pan-tilt unit 1 controls the camera to adjust its angle from horizontal to upward, the spring force of the spring 11 that supports the weight of the camera in the range of 0 to 90 degrees gradually decreases. When the load-bearing arm 7 moves to 90 degrees, the spring 11 in both ranges no longer provides elastic force. At this time, the weight of the camera itself will be borne by the rotating shaft 6. When the load-bearing arm 7 continues to move from 90 degrees to 130 degrees, the spring force of the spring 11 that supports the weight of the camera in the range of 90 to 130 degrees gradually increases. Conversely, when the load-bearing arm 7 moves from 130 degrees to 0 degrees, the force is reversed.

[0029] Example 2, please refer to Figures 1 to 9 A security monitoring system based on IoT data, used for medium to large-sized cameras weighing over 2.5kg, has the following technical solution:

[0030] In Embodiment 2, unlike Embodiment 1, when the pan-tilt unit 1 needs to mount a medium or large-sized camera, the spring 11 in the load-bearing device may not be sufficient. In this case, the same effect can be achieved by adding a counterweight of a specified weight to the counterweight box 25. After the installation operation in Embodiment 1 is completed, the dust cover 27 outside the counterweight box 25 is opened, the counterweight is placed into the counterweight box 25, and the counterweight is clamped by the adjustable clamp 28. After clamping is completed, the dust cover 27 is closed. At this time, no matter how the load-bearing arm 7 moves, the counterweight box 25 in the dust cover remains perpendicular to the ground due to the influence of gravity. A force opposite to the direction of the camera's gravity is continuously applied through the rotating shaft 6 as the fulcrum.

[0031] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A security monitoring system based on Internet of Things data, comprising a pan-tilt unit (1), a pan-tilt base (2), a camera bracket (3), a housing (4), a housing cover (16), and a rotating shaft (6), wherein the pan-tilt unit (1) is mounted on the pan-tilt base (2), and housings (4) are mounted on both sides of the pan-tilt unit (1), the camera bracket (3) is mounted on the pan-tilt unit (1) via the rotating shaft (6), and the housing (4) is provided with a housing cover (16) at the connection point of the rotating shaft (6), characterized in that: A pair of load-bearing devices are installed on both sides of the pan-tilt unit (1). The load-bearing devices are used to share the weight of the camera and reduce the motor load.

2. The IoT-based security monitoring system according to claim 1, characterized in that: The load-bearing device includes mounting holes (5) around the outer shell (4), a load-bearing arm (7) is rotatably mounted on the rotating shaft (6), two springs (11) are installed inside the outer shell (4), a spring fixing block (13) is movably installed inside the outer shell (4), the two springs (11) are located on both sides of the spring fixing block (13), the load-bearing arm (7) is connected to the camera bracket (3), and the two ends of the two springs (11) are fixedly connected to the load-bearing arm (7) and the spring fixing block (13) respectively.

3. The IoT-based security monitoring system according to claim 2, characterized in that: Both the load-bearing arm (7) and the spring fixing block (13) are provided with spring grooves (12), and the spring (11) is located in the spring grooves (12).

4. The IoT-based security monitoring system according to claim 3, characterized in that: A limiting port (9) is provided on the outer shell (4), and the load-bearing arm (7) is set in the limiting port (9). A sliding ring (10) is provided on the load-bearing arm (7), and the sliding ring (10) wraps around the outer ring of the outer shell (4). A balancing device is connected to the sliding ring (10), and the balancing device is used to increase the load-bearing capacity of the gimbal (1).

5. A security monitoring system based on IoT data according to claim 4, characterized in that: An adjusting block (17) is fixedly installed on the inner surface of the outer shell (4). The adjusting block (17) has multiple adjusting holes (18). The spring fixing block (13) has a fixing hole (21) in the center. The outer shell cover (16) is detachably connected to the rotating shaft (6). A partition (14) is installed between the outer shell cover (16) and the load-bearing arm (7). The spring fixing block (13) is located between the outer shell (4) and the partition (14). An adjusting window (19) is opened on the outer shell cover (16) and the partition (14). An adjusting rod (8) is movably installed in the fixing hole (21). The spring fixing block (13) is slidably installed on the adjusting block (17). The adjusting rod (8) cooperates with the multiple adjusting holes (18).

6. A security monitoring system based on IoT data according to claim 5, characterized in that: A dustproof plate (15) is installed between the partition (14) and the outer cover (16). The dustproof plate (15) has a second fixing hole (20). The adjusting rod (8) is simultaneously installed in the second fixing hole (20) and the first fixing hole (21). The dustproof plate (15) is slidably installed on the outer cover (16) and the partition (14).

7. A security monitoring system based on IoT data according to claim 3, characterized in that: A pressure sensor (22) is provided in the spring fixing block (13). The pressure sensor (22) is in close contact with one end of the spring (11). An LED display (23) is installed on the surface of the gimbal (1). The pressure sensor (22) is electrically connected to the LED display (23).

8. A security monitoring system based on IoT data according to claim 4, characterized in that: The balancing device includes a balance bar (24), and a counterweight box (25) is provided at the end of the balance bar (24).

9. A security monitoring system based on Internet of Things data according to claim 8, characterized in that: The balance bar (24) is made of aluminum alloy and has a hollow design.

10. A security monitoring system based on Internet of Things data according to claim 8, characterized in that: An adjustable clamp (28) is installed on the counterweight box (25).

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