A high-speed monitoring camera capable of preventing ghosting

Abstract

The utility model relates to the field of high -speed monitoring, concretely is a kind of high -speed monitoring camera of ghosting prevention. Purpose is to provide a kind of high -speed monitoring camera of ghosting prevention, this high -speed monitoring camera should avoid strong glare interference, ensure monitoring picture quality. Technical scheme is a kind of high -speed monitoring camera of ghosting prevention, including the protective cover with window glass and the camera in protective cover;Its characterized in that: the camera keeps certain pitch angle with window glass, camera faces the lower part of window glass;The camera keeps certain angle of deviation with window glass, camera faces the left side or right side of window glass;The camera keeps certain roll angle with window glass, and there is height difference in the two sides of camera.

Description

Technical Field

[0001] This utility model relates to the field of high-speed surveillance, specifically a high-speed surveillance camera with anti-ghosting capabilities. Background Technology

[0002] With the continuous expansion of highway construction in my country, monitoring and management of key road sections have become core tasks. When driving on highways at night, vehicles often use high beams. The light source projects onto the windshield of the camera, and after refraction through the glass, it creates glare spots on the monitoring camera (i.e., "ghosting"), resulting in the loss of crucial information such as vehicle license plates and models, posing significant challenges to subsequent incident detection and analysis. Currently, ghosting is mainly prevented using multi-layer coated filters and image parameter adjustments.

[0003] Multilayer coated filters have the following defects:

[0004] 1. High cost: Multi-layer coating requires precision processes and high-quality materials, which leads to a significant increase in production costs;

[0005] 2. Fragile film layer: The coating layer is relatively delicate and is easily scratched or abraded, affecting its service life and anti-glare effect;

[0006] 3. High process difficulty and low yield: It is necessary to use a multi-layer high-low refractive index alternating film system design (such as 7-12 layers of film) to reduce the reflectivity of a single surface to 0.1% to 0.3%;

[0007] 4. Cannot cure the reflex: can only alleviate the ghosting phenomenon.

[0008] Image parameter tuning has the following drawbacks:

[0009] 1. Limited environmental adaptability: Relying on preset parameters (such as exposure time and aperture size), it may not be able to optimize in real time under complex lighting conditions (such as strong backlight and dynamic scenes), resulting in unstable anti-ghosting effect;

[0010] 2. Sacrificing image quality: Over-calibration may introduce noise or reduce image brightness, affecting the overall image clarity;

[0011] 3. Cannot cure the reflex: can only alleviate the ghosting phenomenon. Utility Model Content

[0012] The purpose of this invention is to overcome the shortcomings in the above-mentioned background technology and provide a high-speed surveillance camera with anti-ghosting capabilities. This high-speed surveillance camera should be able to avoid strong glare interference and ensure the quality of the surveillance image.

[0013] The technical solution of this utility model is:

[0014] A high-speed surveillance camera with anti-ghosting features includes a protective cover with a viewing window and a camera housed within the protective cover; characterized in that: the camera maintains a certain downward angle with the viewing window, and the camera faces the lower part of the viewing window; the camera maintains a certain angle of deviation with the viewing window, and the camera faces the left or right side of the viewing window; the camera maintains a certain roll angle with the viewing window, and there is a height difference between the two sides of the camera.

[0015] The camera is fixed in the protective cover by a U-shaped bracket.

[0016] The bracket includes a top plate and two side support plates; the camera is fixed to the top surface of the top plate.

[0017] The top plate is lower in the front and higher in the back, and there is a height difference between the two sides.

[0018] The camera is fixed to the top plate by fasteners; the top plate is provided with fixing holes and arc-shaped grooves for installing fasteners.

[0019] The support plate has strip-shaped holes.

[0020] The depression angle is 7.9 ± 3 degrees.

[0021] The angle between the two sides of the top plate and the xz plane is 10 degrees, and the angle between the front and rear edges of the top plate and the xz plane is 10 degrees.

[0022] The beneficial effects of this utility model are:

[0023] 1. Immediate effect and no post-processing required: This utility model adjusts the positional relationship between the camera and the viewing window glass through physical structure, thereby directly changing the light path. It can eliminate ghosting in real time without relying on software algorithms or post-processing, making it suitable for high-speed monitoring scenarios with high real-time requirements.

[0024] 2. Not dependent on hardware performance: Traditional image parameter adjustment (such as HDR mode) requires the camera to have a high-performance processor and a large dynamic range capability; the physical structure of this utility model only relies on mechanical design, has no requirements for hardware computing power, and is lower in cost and more compatible.

[0025] 3. Solve the problem at its root: Although traditional multi-layer coating technology can reduce light reflection, it cannot completely eliminate ghosting; the physical structure of this utility model, through angle design, allows the glare spot to be directly projected outside the monitoring area, blocking the generation of ghosting from the physical level of light path propagation. Attached Figure Description

[0026] The following describes some specific embodiments of the present invention in a detailed manner by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or components.

[0027] Figure 1 This is a schematic diagram of the main structure of this utility model.

[0028] Figure 2 This is a top view of the structure of this utility model.

[0029] Figure 3 This is a schematic diagram of the left-side structure of this utility model.

[0030] Figure 4 This is a three-dimensional structural diagram of the bracket of this utility model.

[0031] Figure 5 This is a front view structural diagram of the bracket of this utility model.

[0032] Figure 6 This is a top view of the bracket structure of this utility model.

[0033] Figure 7 This is a right-side structural schematic diagram of the bracket of this utility model.

[0034] Figure 8 This is a schematic diagram of the left-side structure of the bracket of this utility model.

[0035] Figure label:

[0036] Protective cover 1, viewing window glass 1-1, cover edge 1-2, stepped surface 1-3, camera 2, lens 2-1, bracket 3, top plate 3-1, support plate 3-2, folded edge 3-3, fixing hole 3-4, arc groove 3-5, strip hole 3-6, lens axis a, horizontal axis b. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for explaining the present utility model and are not intended to limit the present utility model.

[0038] like Figure 1 As shown, a high-speed surveillance camera with anti-ghosting features includes a protective housing 1. The front of the protective housing has a viewing window 1-1, a housing edge 1-2, and an illumination source (omitted in the figure). Inside the protective housing is a camera 2 and a power module (omitted in the figure). The lens 2-1 of the camera is aligned with the viewing window. The above structure is the same as existing technology. The improvement of this utility model lies in:

[0039] The camera is fixed in the protective housing by bracket 3. The lens axis a of the camera is not perpendicular to the viewing window glass; therefore, the lens plane of the camera maintains a certain angle with the viewing window glass plane, specifically including (taking the xyz coordinate system of a high-speed surveillance camera as an example):

[0040] (1) The lens plane of the camera maintains a certain downward angle with the glass plane of the viewing window. The camera faces the lower part of the viewing window and is in a downward position (if it is in an upward position, the lens will be blocked by the edge of the lens cover), so that the lens avoids direct light from the light source at a high position; the downward angle is the angle between the lens axis a of the camera and the xz plane; the downward angle is 7.9±3 degrees.

[0041] (2) The lens plane of the camera maintains a certain angle with the window glass plane, the camera faces the left or right side of the window glass, and the camera is tilted so that the lens avoids direct light from the side; the angle is the angle between the lens axis a of the camera and the yz plane.

[0042] (3) The camera lens plane and the viewing window glass plane maintain a certain roll angle. There is a height difference between the two sides of the camera (left low and right high or right high and left low). The camera is tilted. The camera rotates a certain angle clockwise or counterclockwise around the lens axis, changing the reflection path of the incident light inside the lens. The reflected light spot that would originally converge in the monitoring area is shifted and moves out of the picture. The roll angle is the angle between the camera's horizontal axis b and the xz plane.

[0043] The bracket has a U-shaped cross-section and includes a top plate 3-1 and a support plate 3-2. The support plate is located on both sides of the top plate, with its top edge connected to the side edge of the top plate, and its bottom edge having a folded edge 3-3. The top plate has fixing holes 3-4 and arc-shaped grooves 3-5. The folded edge has strip-shaped holes 3-6. The camera is fixed to the top plate.

[0044] The top plate is a rectangular plate arranged at an angle, and the supporting plates on both sides of the top plate are trapezoidal plates of different sizes. The plane of the top plate is not perpendicular to the plane of the viewing window glass. The top plate is lower in the front and higher in the back, and lower on the left and higher on the right (or higher on the left and lower on the right), forming a tilt angle and a roll angle. The camera is fixed on the top surface of the top plate and located between the supporting plates on both sides.

[0045] The camera is secured by fasteners (omitted in the figure) installed in fixing holes and arc-shaped grooves. The bottom surface of the camera housing has connecting holes (omitted in the figure) for installing the fasteners. The fixing holes are located at the center of the arc-shaped groove, and the central angle of the arc-shaped groove is 40 degrees, allowing the camera to move to the left and right sides. Figure 3 The camera can be tilted to the left and right sides (to form a tilt angle). On the top plane, the camera can tilt up to 20 degrees to the left and right respectively.

[0046] The folded edge is provided with strip-shaped holes 3-6. The folded edge is mounted on the stepped surfaces 1-3 of the inner walls on both sides of the protective cover and fixed with fasteners (omitted in the figure). It is used to adjust the front and rear positions of the bracket in the protective cover to adapt to different installation scenarios.

[0047] Preferably, the length of the bracket is 148mm. Figure 7The horizontal distance), the width of the bracket is 140mm ( Figure 5 (Horizontal distance), the angle between the two sides of the top plate and the xz plane is 10 degrees, and the angle between the front and rear edges of the top plate and the xz plane is 10 degrees.

[0048] As a preferred option, the depression angle is 7.9 degrees.

[0049] The high-speed surveillance camera provided by this utility model adjusts the angle of the camera in three dimensions: horizontal plane (xz plane), vertical plane (yz plane), and axial direction (lens axis a). This causes the light illuminating the protective glass to be refracted and deflected outside the monitoring area of ​​the conventional lens, avoiding ghosting interference with the monitoring image and facilitating the restoration of image details and the detection and identification of target objects.

[0050] The above-described embodiments are merely illustrative of several implementations of this utility model, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A high-speed surveillance camera with anti-ghosting capability, comprising a protective housing (1) with a viewing window (1-1) and a camera (2) disposed within the protective housing; characterized in that: The camera maintains a certain downward angle with the viewing window, and the camera faces the lower part of the viewing window; the camera maintains a certain tilt angle with the viewing window, and the camera faces the left or right side of the viewing window; the camera maintains a certain roll angle with the viewing window, and there is a height difference between the two sides of the camera.

2. The high-speed surveillance camera with anti-ghosting capability according to claim 1, characterized in that: The camera is fixed in the protective cover by a U-shaped bracket (3).

3. A high-speed surveillance camera with anti-ghosting capability according to claim 2, characterized in that: The bracket includes a top plate (3-1) and two side support plates (3-2); the camera is fixed to the top surface of the top plate.

4. A high-speed surveillance camera with anti-ghosting capability according to claim 3, characterized in that: The top plate is lower in the front and higher in the back, and there is a height difference between the two sides.

5. A high-speed surveillance camera with anti-ghosting capability according to claim 4, characterized in that: The camera is fixed to the top plate by fasteners; the top plate is provided with fixing holes (3-4) and arc grooves (3-5) for installing fasteners.

6. A high-speed surveillance camera with anti-ghosting capability according to claim 5, characterized in that: The support plate is provided with strip holes (3-6).

7. A high-speed surveillance camera with anti-ghosting capability according to claim 6, characterized in that: The depression angle is 7.9 ± 3 degrees.

8. A high-speed surveillance camera with anti-ghosting capability according to claim 7, characterized in that: The angle between the two sides of the top plate and the xz plane is 10 degrees, and the angle between the front and rear edges of the top plate and the xz plane is 10 degrees.

Images