A three-dimensional visual passage detection device

Abstract

The utility model provides a kind of three-dimensional vision passage detection device, applied to passage detection technical field, including the cavity being constituted by shell, front cover and back cover, cavity inside is equipped with high-definition camera, three-dimensional camera, LED lamp group, vision algorithm main control board and passage algorithm main control board;Three-dimensional camera, vision algorithm main control board are fixed on mounting plate one, high-definition camera, LED lamp group are fixed on mounting plate two, and passage algorithm main control board is connected with mounting plate one and mounting plate two respectively.The three-dimensional vision passage detection device, camera equipment, main control board and other components are concentrated and packaged, under the premise of ensuring the reliability of passage detection, reduce the opening and internal mounting structure of gate box, simplify wiring, alleviate the problem of crowded space inside the box, facilitate the standardized upgrading of different models of inventory gate, reduce manufacturing and transformation cost, improve the installation and maintenance convenience and overall reliability of passage detection device.

Description

Technical Field

[0001] This utility model belongs to the field of access detection technology, specifically relating to a three-dimensional visual access detection device. Background Technology

[0002] As an important facility in access control scenarios such as rail transit and building access control, the accurate working status of turnstiles directly affects the passage experience and security.

[0003] Current turnstile access control typically employs distributed detection elements such as infrared beam sensors and grating sensors, arranged inside the turnstile channel. Multiple pairs of sensors detect personnel entering and exiting in segmented areas. On one hand, to determine behaviors such as entry, lingering, tailgating, and reverse movement, multiple sets of sensors and their supports need to be arranged along the length of the channel. This requires numerous mounting holes, slots, and wiring through-holes in the sheet metal parts of the turnstile housing, resulting in a complex internal structure and demanding manufacturing processes. On the other hand, the distributed sensor installation requires individual position adjustments and light calibration during assembly, leading to lengthy assembly times. Furthermore, if a sensor shifts or fails during long-term operation, troubleshooting and replacement are cumbersome, resulting in high maintenance costs.

[0004] With the development of machine vision and 3D imaging technologies, some new turnstiles have begun to incorporate cameras and visual algorithms for access control. However, new problems have emerged in engineering applications: Existing turnstile housings have limited internal space, with existing control boards, power modules, and drive modules already occupying most of the installation space. Adding separate vision processing boards and camera modules often requires redesigning the housing structure or adding extra openings and brackets on the top and sides of the turnstile, which can easily cause spatial interference with existing structures. Furthermore, the structures of existing turnstiles vary significantly between different brands and models. Without a standardized modular hardware form, each turnstile requires a separate vision upgrade plan, resulting in high costs and long development cycles. Meanwhile, if cameras are directly exposed to the passageway environment, they are susceptible to dust, moisture, and impacts, making it difficult to guarantee image quality and lifespan, and consequently reducing the reliability of access control.

[0005] When it is necessary to upgrade the functionality of a large number of turnstiles already in use, how to add a stable and reliable three-dimensional vision access detection capability without significantly altering the existing cabinet structure and internal layout is a common technical challenge faced in engineering renovations. Utility Model Content

[0006] In view of the above-mentioned problems in the prior art, the purpose of this utility model is to provide a three-dimensional visual access detection device.

[0007] A three-dimensional visual passage detection device is used to detect pedestrians passing through a turnstile. It includes a cavity composed of a housing, a front cover, and a rear cover. Inside the cavity are installed a high-definition camera, a three-dimensional camera, an LED light assembly, a visual algorithm main control board, and a passage algorithm main control board. The three-dimensional camera and the visual algorithm main control board are both fixed to a first mounting plate, and the high-definition camera and the LED light assembly are both fixed to a second mounting plate. The passage algorithm main control board is connected to both mounting plates, and both mounting plates are fixedly connected to the housing.

[0008] Preferably, the visual algorithm main control board and the access algorithm main control board are connected in communication, and the high-definition camera and the 3D stereo camera are both connected in communication with the visual algorithm main control board.

[0009] Preferably, the front cover is provided with a lens cover one, a lens cover two, and a light-transmitting hole. The lens cover one corresponds to the position of the 3D stereo camera, the lens cover two corresponds to the position of the high-definition camera, and the light-transmitting hole corresponds to the position of the LED light group.

[0010] Preferably, the rear cover plate is fixed to the outer shell by fasteners, the front cover plate is fitted onto the outer shell by a groove structure, and the rear cover plate is fitted with connectors by a fixing plate for communication connection with external devices.

[0011] Preferably, the access detection device is connected to the gate, which includes a gate master and a gate slave. The gate master is equipped with a gate ECU, and both the gate master and the gate slave are equipped with a door unit controller. The gate ECU and the door unit controller are both communicatively connected to the access detection device.

[0012] Preferably, the access detection device is located above the gate channel, and the detection range of the high-definition camera and the 3D camera is the entire gate channel.

[0013] The beneficial effects of this utility model are: the three-dimensional vision access detection device replaces multiple pairs of scattered sensors and gratings inside the gate with a standardized three-dimensional vision access detection device, simplifies the internal structure of the gate, reduces sheet metal openings and supports, reduces manufacturing costs, and helps to shorten the gate length, reduce volume, and improve the efficiency of on-site space utilization.

[0014] Without significantly altering the internal structure of the existing turnstile housing, a centralized installation space is reserved for the addition of visual detection and access control functions. This alleviates the problems of overcrowding and difficulty in arranging circuit boards inside the original housing, and reduces the difficulty and design cost of retrofitting existing turnstiles.

[0015] By using a unified housing, installation interface, and wiring method, a universal visual inspection module that can be adapted to different gate models is formed, which facilitates batch transformation, reduces the investment in redeveloping hardware for different gate structures, and further saves transformation costs. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the connection between the detection device of this utility model and the gate; Figure 2 This is a schematic diagram of the structure of the housing of the detection device of this utility model; Figure 3 This is a schematic diagram of the front cover plate of this utility model; Figure 4 This is an exploded view of this utility model.

[0017] The components in the diagram are labeled as follows: 1. Outer shell; 2. Front cover; 3. Fixing component; 4. Fixing plate; 5. Connecting component; 6. Lens cap one; 7. Lens cap two; 8. Light-transmitting hole; 9. High-definition camera; 10. 3D stereo camera; 11. LED light group; 12. Visual algorithm main control board; 13. Mounting plate one; 14. Mounting plate two; 15. Traffic algorithm main control board; 16. Rear cover. Detailed Implementation

[0018] Example 1 like Figure 2 As shown, a three-dimensional visual passage detection device is used to install on a turnstile to detect pedestrians passing through the turnstile channel. The device includes a cavity composed of a housing 1, a front cover plate 2, and a rear cover plate 16. The rear cover plate 16 is fixed to the housing 1 by a fastener 3, and the front cover plate 2 is fitted onto the housing 1 via a groove structure. Furthermore, a connector 5 is mounted on the rear cover plate 16 via a fixing plate 4 for electrical and communication connection between the device and external equipment.

[0019] Specifically, the cavity is equipped with a high-definition camera 9, a 3D stereo camera 10, an LED light group 11, a vision algorithm main control board 12, and a passage algorithm main control board 15.

[0020] Among them, such as Figure 4As shown, the 3D stereo camera 10 is fixed on mounting plate 13; the high-definition camera 9 and the LED light group 11 are both fixed on mounting plate 14. Mounting plate 13 and mounting plate 14 are fixedly connected to the outer shell 1. The two-dimensional high-definition camera 9, the 3D stereo camera 10 and the LED light group 11 are integrated in the same device, which can simultaneously obtain image information and spatial depth information of the passage area at the same installation position. Moreover, through the cooperation of the LED light group 11 and the camera, the imaging area of ​​the camera is kept within a stable illumination range, reducing the impact of changes in external light on passage detection and improving the reliability and stability of detection.

[0021] In addition, the visual algorithm main control board 12 is fixed on the mounting plate 13, and the access algorithm main control board 15 is connected to the mounting plate 13 and the mounting plate 2 14 respectively. The visual algorithm main control board 12 and the access algorithm main control board 15 communicate with each other via serial port. The high-definition camera 9 and the 3D stereo camera 10 are both connected to the visual algorithm main control board 12.

[0022] The internal components are arranged in layers using mounting plates 13 and 14, allowing for a compact layout of the vision module and control board within the device, thus alleviating space congestion within the gate housing. Furthermore, the layered installation of the vision algorithm main control board 12 and the passage algorithm main control board 15 within the same housing reduces signal interference and connector malfunctions caused by long cables running across the housing, improving overall operational reliability.

[0023] Furthermore, such as Figure 3 As shown, lens cover 6, lens cover 7, and light-transmitting hole 8 are positioned at corresponding locations on the front cover plate 2. Lens cover 6 corresponds to the position of the 3D stereo camera 10, lens cover 7 corresponds to the position of the high-definition camera 9, and light-transmitting hole 8 corresponds to the position of the LED light group 11. By combining the lens covers with the front cover plate 2, the camera is encased in the housing structure, with only the optical window visible. This effectively prevents dust, water drips, and accidental contact, ensuring image quality and device reliability. Furthermore, the two lens covers are fixedly arranged relative to each other, pre-setting a fixed baseline position and relative angle for the high-definition camera 9 and the 3D stereo camera 10. This facilitates subsequent spatial calibration and stable acquisition of effective channel images / depth information, structurally improving the usability of 3D vision inspection.

[0024] Furthermore, by encapsulating the high-definition camera 9, the 3D stereo camera 10, the LED light group 11, the vision algorithm main control board 12, and the passage algorithm main control board 15 into a single independent cavity, the device only requires a few pre-drilled mounting holes on the turnstile. This eliminates the need to install multiple pairs of sensors and gratings inside the passage, significantly reducing the number and complexity of openings and slots in the turnstile's sheet metal parts, thus lowering the difficulty of sheet metal processing and manufacturing costs. Moreover, since the detection devices are concentrated inside the housing, most of the sensor brackets and mounting structures inside the turnstile passage can be eliminated, which helps to shorten the length of the housing, reduce the overall volume, and improve space utilization.

[0025] Example 2 Connect the three-dimensional visual access detection device described in Embodiment 1 to a gate in the prior art.

[0026] In a specific embodiment, such as Figure 1 As shown, the turnstile includes a turnstile master unit and a turnstile slave unit. The turnstile master unit is equipped with a turnstile ECU. Both the turnstile master unit and the turnstile slave unit are equipped with a door unit controller. The turnstile ECU and the door unit controller communicate with the three-dimensional vision access detection device via serial port to achieve coordinated operation.

[0027] Furthermore, the device is installed above the turnstile channel, and its high-definition camera 9 and 3D stereo camera 10 have a detection range covering the entire turnstile channel. Structurally, it replaces multiple pairs of scattered gratings and sensors, reducing the number of detection elements and installation locations that need to be installed inside the turnstile.

[0028] This module is embedded or externally connected to different models of turnstiles with a standardized structure, making it easy to add visual detection and access control functions to existing turnstiles that mainly rely on traditional sensor detection. At the same time, the original sensor system can be retained as redundancy. This reduces the difficulty of retrofitting various existing turnstiles from a structural perspective, reduces the workload of redesigning the box sheet metal and brackets, and saves retrofitting costs.

[0029] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A three-dimensional visual passage detection device, used for installation on a turnstile to detect pedestrian passage within the turnstile channel, characterized in that, It includes a cavity consisting of an outer shell, a front cover, and a rear cover, and a high-definition camera, a 3D stereo camera, an LED light group, a visual algorithm main control board, and a traffic algorithm main control board are installed inside the cavity; The three-dimensional camera and the visual algorithm main control board are both fixed on mounting plate one, and the high-definition camera and the LED light group are both fixed on mounting plate two. The access algorithm main control board is connected to mounting plate one and mounting plate two respectively, and mounting plate one and mounting plate two are fixedly connected to the outer shell.

2. The three-dimensional visual access detection device according to claim 1, characterized in that, The vision algorithm main control board and the access algorithm main control board are connected in communication. The high-definition camera and the 3D stereo camera are also connected in communication with the vision algorithm main control board.

3. The three-dimensional visual access detection device according to claim 1, characterized in that, The front cover is equipped with a lens cover one, a lens cover two, and a light-transmitting hole. The lens cover one corresponds to the position of the 3D stereo camera, the lens cover two corresponds to the position of the high-definition camera, and the light-transmitting hole corresponds to the position of the LED light group.

4. The three-dimensional visual access detection device according to claim 1, characterized in that, The rear cover plate is fixed to the outer shell by fasteners, the front cover plate is fitted onto the outer shell by a groove structure, and the rear cover plate is fitted with connectors by a fixing plate for communication connection with external devices.

5. The three-dimensional visual access detection device according to any one of claims 1 to 4, characterized in that, The access detection device is connected to the turnstile, which includes a turnstile master unit and a turnstile slave unit. The turnstile master unit is equipped with a turnstile ECU, and both the turnstile master unit and the turnstile slave unit are equipped with a door unit controller. The turnstile ECU and the door unit controller are both communicatively connected to the access detection device.

6. The three-dimensional visual access detection device according to claim 5, characterized in that, The passage detection device is located above the gate channel, and the detection range of the high-definition camera and the 3D camera covers the entire gate channel.

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