Multi-angle pinhole camera detection device

Abstract

The utility model discloses a multi-angle pinhole camera detection device, and relates to the technical field of camera detection. A lifting plate is movably arranged in the box body; a lifting mechanism for driving the lifting plate to move and a mounting plate are arranged in the box body; the box body is rotationally arranged on the lifting plate through a rotating shaft; a rotating mechanism for driving the rotating shaft to rotate is arranged on the lifting plate; a laser emitting device is rotationally connected to the rotary table through a fixing plate, an adjusting mechanism for driving the laser emitting device to rotate is arranged on the rotary table, and a control processing unit is fixedly installed on the outer wall of the box body. According to the utility model, through the cooperation of the structures of the laser emitting device, the holder camera, the control processing unit and the like, a user can accurately judge the position of the pinhole camera according to the calculation result of the control processing unit, and the detection precision and efficiency of the pinhole camera are improved.

Description

Technical Field

[0001] This utility model belongs to the field of camera detection, specifically, it relates to a multi-angle pinhole camera detection device. Background Technology

[0002] With the rapid development and popularization of technology, electronic devices play an indispensable role in people's daily lives and work. However, this has also brought a series of hidden dangers to privacy. Among them, the problem of illegal filming by pinhole cameras is becoming increasingly rampant, seriously infringing on the privacy and security of individuals, enterprises, and even public places. In many scenarios such as hotel accommodation, homestays, changing rooms, and daily activities in the office, criminals take advantage of the strong concealment of pinhole cameras, hiding them in various items such as lamps, power sockets, smoke detectors, and decorations, and silently stealing private images of others. How to quickly, effectively, accurately, and automatically detect and locate hidden pinhole cameras is a key problem faced by society and the public. Laser active detection and identification technology is an important and effective means to solve this problem. The basic principle of laser active detection and identification technology is to actively image the target by illuminating the laser light source of the system in a manual manner, and to obtain the reflected signal of the target by the receiving system. By analyzing the reflected signal, the type of target is identified, some technical parameters of the target are obtained, and the target is located with high precision.

[0003] Chinese patent CN217216763U discloses a device for detecting hidden cameras based on infrared-assisted functionality. This device emits red light using a red light lamp. If a camera is present, the red light reflects off the camera's lens, and the reflected light has the same wavelength as the emitted light. The reflected light reaches a filter, which allows red light to pass through, thus filtering out other colors. If a camera is present, the user will see a red dot on the filter. This allows for the detection of pinhole cameras with infrared assistance, facilitating timely discovery and location of the cameras and reducing the risk of being secretly filmed. However, when used over large areas, the device requires manual movement of the entire unit and constant observation of the red dot on the filter for comprehensive detection. This process is cumbersome, time-consuming, and labor-intensive, reducing the efficiency of pinhole camera detection.

[0004] In view of this, this utility model is proposed. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a multi-angle pinhole camera detection device, which solves the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by this utility model is as follows:

[0007] A multi-angle pinhole camera detection device includes: a housing, which is a hollow structure with an opening through the top; a lifting plate is movably disposed inside the housing; and a lifting mechanism is disposed inside the housing to drive the lifting plate to move toward the opening of the housing.

[0008] A mounting plate is rotatably mounted on a lifting plate via a rotating shaft. The lifting plate is equipped with a rotating mechanism that drives the rotating shaft to rotate. A gimbal camera is fixedly mounted on the mounting plate. A turntable is mounted on the top of the mounting plate via a connecting rod. A laser emitting device is rotatably connected to the turntable via a fixed plate. The laser emitting device and the gimbal camera are positioned opposite each other. An adjustment mechanism that drives the laser emitting device to rotate is provided on the turntable. A control processing unit that is signal-connected to the lifting mechanism, the rotating mechanism, the gimbal camera, and the laser emitting device is fixedly mounted on the outer wall of the housing.

[0009] Optionally, the rotating mechanism includes a motor, a first gear, and a second gear. The second gear is sleeved on the rotating shaft, the motor is fixedly mounted on the lifting plate, and the motor is signal-connected to the control processing unit. The first gear is sleeved on and fixedly mounted on the drive shaft of the motor, and the first gear meshes with the second gear.

[0010] Optionally, at least two sliders are fixedly installed on both sides of the lifting plate, and the inner wall of the box is provided with a sliding groove for the sliders to slide.

[0011] Optionally, the adjustment mechanism includes:

[0012] A threaded rod passes through and is threadedly connected to the turntable. A connecting rod is rotatably connected to the top of the threaded rod. A connecting block is fixedly connected to the laser emitting device relative to the connecting rod. The connecting rod is movably mounted on the connecting block via a drive shaft. A drive groove is provided through the connecting block along its length, allowing the drive rod to move.

[0013] A worm gear is sleeved and threadedly connected to the threaded rod. The worm gear is rotatably mounted on the turntable, and a worm gear that meshes with the worm gear is rotatably connected to the turntable.

[0014] Optionally, a limiting plate is fixedly installed at the end of the threaded rod opposite to the connecting rod.

[0015] Optionally, an infrared emitter is fixedly connected to the gimbal camera, and the emitting end of the laser emitting device, the emitting end of the infrared emitter, and the shooting end of the gimbal camera are facing the same direction.

[0016] Optionally, a cover plate is hinged to the opening of the housing.

[0017] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art. Of course, any product implementing the present invention does not necessarily need to achieve all of the following advantages at the same time:

[0018] 1. By setting up a laser emitting device, a gimbal camera, and a control processing unit, the combination of these components allows users to accurately determine the location of pinhole cameras based on the calculation results of the control processing unit. The entire operation process is simple and efficient, facilitating rapid detection of large areas and improving the accuracy and efficiency of pinhole camera detection.

[0019] 2. By incorporating sliders and grooves, the combined design of sliders and grooves greatly enhances the stability and smoothness of the lifting plate's movement;

[0020] 3. The device is equipped with an adjustment mechanism, which allows for precise control of the rotation angle of the laser emitting device. Whether it is a small angle adjustment or a large angle change, it can be handled with ease, adapting to the detection requirements of complex spatial structures and improving the overall device's ability to capture pinhole cameras.

[0021] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0022] The accompanying drawings described below are merely some embodiments. Those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0023] In the picture:

[0024] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0025] Figure 2 This is a schematic diagram of the internal structure of the box body of this utility model;

[0026] Figure 3 This is a schematic diagram of the structure of the lifting plate of this utility model after it has been raised.

[0027] Figure 4 This is a schematic diagram of the adjustment mechanism of this utility model;

[0028] Figure 5 This is a schematic diagram of the rotating mechanism of this utility model;

[0029] Figure 6 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0030] The present invention will now be described in further detail with reference to the accompanying drawings.

[0031] Please see Figure 1-6 As shown, this embodiment provides a multi-angle pinhole camera detection device, including a housing 1, which is a hollow structure with an opening through the top. A lifting plate 4 is movably installed inside the housing 1. A lifting mechanism 3 is provided inside the housing 1 to drive the lifting plate 4 to move toward the opening of the housing 1. A mounting plate 11 is rotatably mounted on the lifting plate 4 via a rotating shaft 10. A rotating mechanism 6 is provided on the lifting plate 4 to drive the rotating shaft 10 to rotate. A gimbal camera 7 is fixedly mounted on the mounting plate 11. A turntable 13 is mounted on the top of the mounting plate 11 via a connecting rod 97. A laser emitting device 8 is rotatably connected to the turntable 13 via a fixed plate 14. The laser emitting device 8 and the gimbal camera 7 are arranged facing each other. An adjustment mechanism 9 is provided on the turntable 13 to drive the laser emitting device 8 to rotate. A control processing unit 5 that is signal-connected to the lifting mechanism 3, the rotating mechanism 6, the gimbal camera 7, and the laser emitting device 8 is fixedly installed on the outer wall of the housing 1.

[0032] Specifically, in this embodiment, the lifting mechanism 3 can be a screw jack, electric jack, etc., and the laser emitting device 8 includes components such as an optical emitting lens, a laser, and a laser driver. After the angle of the turntable 13 is adjusted by the rotating mechanism 6, the laser driver will drive the laser to emit a corresponding laser beam after the control processing unit 5 sends a trigger signal to the laser driver. This beam is collimated and expanded by the optical emitting lens to form an illumination beam with the designed divergence angle, thereby completing the supplementary lighting illumination of the area directly in front of the device. Typically, the laser is selected in the invisible wavelength band such as 915nm or 850nm. At the same time, the gimbal camera 7 acts as a signal receiver to obtain the image corresponding to the scene for subsequent processing and analysis. The control processing unit 5 mainly consists of a control unit and a calculation unit. The control unit is responsible for driving the laser emitting device 8, the rotating mechanism 6, the gimbal camera 7, and the lifting mechanism 3 according to the designed working logic, while the calculation unit performs algorithm calculation steps on the data obtained by the gimbal camera 7 and the laser emitting device 8 to obtain the final calculation result. Of course, the data captured by the gimbal camera 7 and the laser emitting device 8 will be sent to the control processing unit 5 for processing. The process involves data processing and analysis. When a comprehensive inspection of a designated area is required, the control processing unit 5 first controls the lifting mechanism 3 to move the lifting plate 4 towards the opening of the housing 1. When the mounting plate 11 on the lifting plate 4 moves higher than the opening of the housing 1, the lifting stops. Then, the rotating mechanism 6 drives the rotating shaft 10 to rotate. At this time, the laser emitting device 8 is not working. While the mounting plate 11 and the turntable 13 are rotating, the control processing unit 5 drives the gimbal camera 7 to take pictures of the current scene under unlit conditions and save them. Then, the control processing unit 5 activates the laser to provide supplementary lighting. The rotating mechanism 6 drives the rotating shaft 10 to reverse. At this time, the control processing unit 5 drives the gimbal camera 7 again to record and save the scene under lit conditions. After completing all the above processes, the state movement is adjusted again, and the above process is repeated. Finally, all the pictures are sent to the control processing unit 5 as raw data for calculation. The user can accurately determine the location of the pinhole camera based on the calculation results of the control processing unit 5. The entire operation process is simple and efficient, making it easy to quickly detect large areas and improve the detection accuracy and efficiency of pinhole cameras.

[0033] It should be noted that, in this embodiment, the calculation method for the pinhole camera detection algorithm by the control processing unit can refer to... Figure 6 The specific steps are as follows:

[0034] Step 1: First, label the sequence of bright and dark images obtained by the gimbal camera 7 at an angle j of the laser emitting device 8 as A. i，j B i，j , where i represents the field of view of the scene captured by the gimbal camera 7;

[0035] Step 2: Rematch all images. Using scene (i) as a constraint, select a sequence of bright and dark images of the same scene at different laser angles (j) as a group, denoted as U. i V i ;

[0036] Step 3: For U respectively i V i By subtracting the frames, we obtain the frame difference image sequence Y of the same set of images in the same scene under both bright and dark conditions. i ;

[0037] Step 4: Match the bright areas in the frame difference images U and V, and compare the bright spots with the set threshold. Bright spots that are higher than the threshold are the possible locations of pinhole cameras.

[0038] Step 5: Select images Y of adjacent turntable angles within the same field of view. i，j Y i，j-1 Y i，j+1 By comparing the changes in the intensity of the bright spot after a slight shift in the laser, if the change is significant, the location of the pinhole camera can be further confirmed, thereby improving the accuracy of identifying cat-eye targets on pinhole cameras.

[0039] In this embodiment, as Figure 2 , Figure 4 and Figure 5 As shown, the rotating mechanism 6 includes a motor 61, a first gear 62, and a second gear 63. The second gear 63 is sleeved on the rotating shaft 10. The motor 61 is fixedly mounted on the lifting plate 4 and is signal-connected to the control processing unit 5. The first gear 62 is sleeved on and fixedly mounted on the drive shaft 94 of the motor 61, and the first gear 62 meshes with the second gear 63. Specifically, the control processing unit 5 sends a start signal to the motor 61. After receiving the signal, the motor 61 starts to rotate, and the first gear 62 fixed on its drive shaft 94 rotates synchronously. The second gear 63 on the rotating shaft 10 meshes with each other, and the rotational motion of the first gear 62 is transmitted to the second gear 63 through the interaction between the teeth, causing the second gear 63 to rotate, which in turn drives the rotating shaft 10 to rotate, ultimately realizing the angle adjustment of the mounting plate 11 and the gimbal camera 7 and laser emitting device 8 on the horizontal plane, and accurately positioning it to the direction of the area to be detected. It should be noted that in another embodiment, the rotating shaft 10 can also be directly driven to rotate by the motor 61. In contrast, in this embodiment, the effect of accurately controlling the rotating shaft 10 can be achieved by changing the size of the two gears.

[0040] In this embodiment, as Figure 3 , Figure 4 and Figure 5As shown, at least two sliders 17 are fixedly installed on both sides of the lifting plate 4. The inner wall of the housing 1 is provided with a sliding groove 16 for the sliders 17 to slide. Specifically, the combination design of the sliders 17 and the sliding groove 16 greatly enhances the stability and smoothness of the movement of the lifting plate 4.

[0041] In this embodiment, as Figure 4 and Figure 5 As shown, the adjustment mechanism 9 includes a threaded rod 91 that is threaded through and connected to the turntable 13. A connecting rod 97 is rotatably connected to the top of the threaded rod 91. A connecting block 95 is fixedly connected to the laser emitting device 8 relative to the connecting rod 97. The connecting rod 97 is movably mounted on the connecting block 95 via a drive shaft 94. A drive groove 96 for the drive rod to move is provided through the connecting block 95 along its length. A worm gear 92 is sleeved on and threadedly connected to the threaded rod 91. The worm gear 92 is rotatably mounted on the turntable 13. A worm 93 that meshes with the worm gear 92 is rotatably connected to the turntable 13. A limit plate 15 is fixedly installed at the end of the threaded rod 91 away from the connecting rod 97. Specifically, when it is necessary to finely adjust the angle of the laser emitting device 8, the worm 93 rotates on the turntable 13. Since the worm 93 and the worm gear 92 mesh with each other, the rotation of the worm 93... The motion drives the worm gear 92 to rotate, and the worm gear 92 is threadedly connected to the threaded rod 91. The rotation of the worm gear 92 causes the threaded rod 91 to move longitudinally along the turntable 13. The movement of the threaded rod 91 drives the connecting rod 97 to move, so that the drive shaft 94 on the connecting rod 97 moves in the drive groove 96. At the same time, it drives the laser emitting device 8 to rotate around the connection point with the fixed plate 14, realizing the precise adjustment of the pitch angle of the laser emitting device 8 to meet the precise requirements of the laser angle when detecting surfaces with different inclinations. The adjustment mechanism 9, which combines the worm gear 92 and worm 93 with the threaded transmission, has the characteristics of high precision and large torque. The worm gear 92 and worm 93 transmission has a self-locking characteristic, which can ensure the stability of the laser emitting device 8 after the angle is adjusted, and it will not easily change due to external interference, thus ensuring the accuracy of the laser angle during the detection process.

[0042] In this embodiment, as Figure 5 As shown, an infrared emitter 18 is fixedly connected to the gimbal camera 7, and the emitting end of the laser emitting device 8, the emitting end of the infrared emitter 18, and the shooting end of the gimbal camera 7 are facing the same direction. Specifically, before adjusting the angle of the laser emitting device 8, light is emitted by the infrared emitter 18 in a designated area. Since the infrared emitter 18 and the shooting end of the gimbal camera 7 are in the same horizontal direction, the light emission point of the infrared emitter 18 is the shooting area of ​​the gimbal camera 7. Therefore, in order to make the emitting end of the laser emitting device 8 face the shooting area of ​​the gimbal camera 7, the emitting end of the laser emitting device 8 can be driven to face the light emission point of the infrared emitter 18 by the adjustment mechanism 9, thereby facilitating the quick adjustment of the angle of the laser emitting device 8.

[0043] In this embodiment, as Figure 1 and Figure 2 As shown, a cover plate 2 is hinged to the opening of the box 1.

[0044] Working principle:

[0045] First, the control processing unit 5 controls the lifting mechanism 3 to move the lifting plate 4 toward the opening of the housing 1. The lifting plate 11 on the lifting plate 4 stops rising when it is higher than the opening of the housing 1. Then, the infrared emitter 18 emits light in a designated area. Since the infrared emitter 18 and the pan-tilt camera 7 are at the same horizontal level, the light emission point of the infrared emitter 18 is the pan-tilt camera 7's shooting area. Therefore, to make the emitting end of the laser emitter 8 face the pan-tilt camera 7's shooting area, the adjustment mechanism 9 can be used to move the emitting end of the laser emitter 8 toward the light emission point of the infrared emitter 18, thus facilitating quick adjustment of the laser emitter 8's angle. Afterwards, the rotating mechanism 6 drives the rotating shaft 10 to rotate; at this time, the laser emitter 8 is not in operation. While the mounting plate 11 and turntable 13 rotate, the control processing unit 5 drives the gimbal camera 7 to capture and save images of the current scene under unlit conditions. Then, the control processing unit 5 activates the laser to provide supplementary lighting. The rotating mechanism 6 drives the rotating shaft 10 to reverse. At this time, the control processing unit 5 drives the gimbal camera 7 again to record and save images of the scene under lit conditions. After completing all the above processes, the state is adjusted and the above process is repeated. Finally, all images are sent to the control processing unit 5 as raw data for calculation. The user can accurately determine the location of the pinhole camera based on the calculation results of the control processing unit 5. The whole operation process is simple and efficient, which facilitates the rapid detection of a large area and improves the detection accuracy and efficiency of pinhole cameras.

[0046] This utility model is not limited to the above-described embodiments. Anyone should know that structural changes made under the guidance of this utility model, and any technical solutions that are the same as or similar to this utility model, fall within the protection scope of this utility model. Technical aspects, shapes, and structures not described in detail in this utility model are all publicly known technologies.

Claims

1. A multi-angle pinhole camera detection device, characterized in that, include: The box (1) is a hollow structure with an opening through the top. A lifting plate (4) is movably installed inside the box (1). A lifting mechanism (3) is provided inside the box (1) to drive the lifting plate (4) to move toward the opening of the box (1). Mounting plate (11) is rotatably mounted on lifting plate (4) via rotating shaft (10). Lifting plate (4) is provided with rotating mechanism (6) for driving rotating shaft (10) to rotate. Gimbal camera (7) is fixedly mounted on mounting plate (11). Turntable (13) is mounted on top of mounting plate (11) via connecting rod (97). Laser emitting device (8) is rotatably connected to turntable (13) via fixing plate (14). Laser emitting device (8) and gimbal camera (7) are arranged facing each other. Turntable (13) is provided with adjustment mechanism (9) for driving laser emitting device (8) to rotate. Control processing unit (5) is fixedly mounted on outer wall of housing (1) and is connected to lifting mechanism (3), rotating mechanism (6), gimbal camera (7) and laser emitting device (8) by signal.

2. The multi-angle pinhole camera detection device of claim 1, wherein, The rotating mechanism (6) includes a motor (61), a first gear (62) and a second gear (63). The second gear (63) is sleeved on the rotating shaft (10). The motor (61) is fixedly installed on the lifting plate (4). The motor (61) is signal connected to the control processing unit (5). The first gear (62) is sleeved and fixedly installed on the drive shaft (94) of the motor (61), and the first gear (62) meshes with the second gear (63).

3. The multi-angle pinhole camera detection apparatus of claim 2, wherein, At least two sliders (17) are fixedly installed on both sides of the lifting plate (4), and the inner wall of the box (1) is provided with a sliding groove (16) for the sliders (17) to slide.

4. The multi-angle pinhole camera detection device of claim 1, wherein, The adjustment mechanism (9) includes: A threaded rod (91) is threaded through and connected to the turntable (13). A connecting rod (97) is rotatably connected to the top of the threaded rod (91). A connecting block (95) is fixedly connected to the laser emitting device (8) relative to the connecting rod (97). The connecting rod (97) is movably mounted on the connecting block (95) via a drive shaft (94). A drive groove (96) for the drive shaft (94) to move is provided through the connecting block (95) along its length. A worm gear (92) is sleeved and threadedly connected to the threaded rod (91). The worm gear (92) is rotatably mounted on the turntable (13). A worm (93) that meshes with the worm gear (92) is rotatably connected to the turntable (13).

5. The multi-angle pinhole camera detection apparatus of claim 4, wherein, A limiting plate (15) is fixedly installed at one end of the threaded rod (91) away from the connecting rod (97).

6. The multi-angle pinhole camera detection apparatus of claim 1, wherein, An infrared emitter (18) is fixedly connected to the gimbal camera (7), and the emitting end of the laser emitting device (8), the emitting end of the infrared emitter (18), and the shooting end of the gimbal camera (7) are facing the same direction.

7. The multi-angle pinhole camera detection apparatus of claim 1, wherein, The opening of the box (1) is hinged with a cover plate (2).

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