License plate recognition camera device with light supplement and stray light interference prevention

Abstract

The utility model provides a license plate recognition camera device with light supplementing and stray light interference preventing functions. The license plate recognition camera device comprises a shell, a camera module and a light supplementing module, wherein the camera module and the light supplementing module are arranged in the shell; the camera module is used for shooting a license plate image, and the light supplementing module is used for illuminating a license plate in a dark light environment; the light supplementing module is arranged near the camera module, a first light-transmitting piece is arranged on the light-in face of the camera module, and a second light-transmitting piece is arranged on the light-out face of the light supplementing module. The utility model solves the problem that the license plate recognition effect is affected due to the poor light supplementing effect of the light supplementing lamp in the occasion with poor illumination state at the entrance and exit of the parking lot.

Description

Technical Field

[0001] This utility model belongs to the technical field of parking lot management equipment, specifically relating to a license plate recognition camera device with supplementary lighting and anti-stray light interference. Background Technology

[0002] License plate recognition devices are a basic component of parking lot management equipment. In poor lighting conditions, license plate recognition requires additional supplementary lighting, which wastes electricity and can be quite bright, interfering with drivers and resulting in poor recognition performance. Utility Model Content

[0003] The purpose of this invention is to solve the problem that the supplementary lighting effect of the lights is poor in parking lot entrances and exits under poor lighting conditions, which affects the license plate recognition effect.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is: a license plate recognition camera device with supplementary lighting and anti-stray light interference, comprising a housing and a camera module and a supplementary lighting module installed within the housing; the camera module is used to capture license plate images, and the supplementary lighting module is used to illuminate the license plate; the supplementary lighting module is disposed near the camera module, the light-incident surface of the camera module is provided with a first light-transmitting sheet, and the light-exiting surface of the supplementary lighting module is provided with a second light-transmitting sheet.

[0005] Optionally, the light-incident surface of the camera module and the light-exit surface of the supplementary light module are disposed on the same plane of the housing, and a non-transparent interval is provided between the first light-transmitting sheet and the second light-transmitting sheet.

[0006] Optionally, the front of the housing is provided with a camera module receiving hole and a supplementary light module receiving hole. A non-transparent protrusion is provided on the front of the housing between the camera module receiving hole and the supplementary light module receiving hole. The non-transparent protrusion divides the front of the housing into a first part and a second part. The first light-transmitting sheet covers the first part of the front of the housing, and the second light-transmitting sheet covers the second part of the front of the housing.

[0007] Optionally, the light-incident surface of the camera module and the light-exiting surface of the supplementary light module are arranged in a stepped manner on one side of the housing, wherein the light-incident surface of the camera module protrudes outward relative to the light-exiting surface of the supplementary light module; or, wherein the light-exiting surface of the supplementary light module protrudes outward relative to the light-incident surface of the camera module.

[0008] Optionally, there are two supplementary lighting modules, which are respectively located on both sides of the camera module.

[0009] Optionally, multiple supplementary lighting modules are provided and arranged around the camera module.

[0010] Optionally, several supplementary lighting modules are provided and disposed on one side of the camera module.

[0011] Optionally, the second light-transmitting sheet is provided with a light-shielding area, which is used to block the light emitted from the light-emitting area of ​​the supplementary light module from the outside to the inside.

[0012] Optionally, the light-shielding area is coated with one or more layers of translucent film.

[0013] Optionally, the light-shielding area is covered with one or more layers of translucent coating.

[0014] Optionally, the substrate of the second light-transmitting sheet in the light-blocking area is transparent, gray, or brown.

[0015] After adopting the above technical solution, the beneficial effects of the present invention are as follows:

[0016] By simultaneously housing both the camera module and the supplementary lighting module, integration is greatly improved. This allows the camera module and supplementary lighting module to be integrated into the same housing, resulting in better supplementary lighting performance. License plate recognition can be achieved with lower supplementary lighting brightness, making license plate recognition more accurate and less interfering with the driver. At the same time, a first light-transmitting sheet is set on the light-incident surface of the camera module, and a second light-transmitting sheet is set on the light-exit surface of the supplementary lighting module. By setting the first light-transmitting sheet and the second light-transmitting sheet respectively, cross-lighting can be avoided when the light from the supplementary lighting module enters the camera module area, thus preventing interference with the quality of the license plate image captured by the camera module. This effectively improves the quality of the license plate image captured during supplementary lighting. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is an exploded schematic diagram of Embodiment 1 of the license plate recognition camera device with supplementary lighting and anti-stray light interference according to this utility model;

[0019] Figure 2 yes Figure 1 Schematic diagram of the middle shell structure;

[0020] Figure 3 This is a schematic diagram of the arrangement of the supplementary lighting module in Embodiment 1 of this utility model;

[0021] Figure 4 This is a schematic diagram of the arrangement of the supplementary lighting module in Embodiment 2 of this utility model;

[0022] Figure 5This is a schematic diagram of the arrangement of the supplementary lighting module in Embodiment 3 of this utility model;

[0023] Figure 6 This is a schematic diagram of the overall structure of Embodiment 1 of this utility model.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Light-emitting module; 2. Camera module; 3. First light-transmitting sheet; 4. Second light-transmitting sheet; 41. Through hole; 42. Light-shielding area; 5. Housing; 51. Light-emitting module receiving hole; 52. Camera module receiving hole; 53. Non-transparent interval; 531. Non-transparent protrusion; 54. Frame; 55. Light-emitting surface of light-emitting module; 56. Light-incident surface of camera module; 6. Waterproof gasket; 7. Bottom shell; 8. Wiring hole; 9. Rainproof sunshade. Detailed Implementation

[0026] The present invention will be further described in detail below with reference to the accompanying drawings.

[0027] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive element, but such modifications are protected by patent law as long as they fall within the scope of the claims of the present invention.

[0028] This embodiment relates to a license plate recognition camera device with supplementary lighting and anti-stray light interference.

[0029] Example 1:

[0030] A license plate recognition camera device with supplemental lighting and anti-stray light interference is provided, specifically as follows: Figure 1 As shown, the system includes a housing 5 and a camera module 2 and a supplementary lighting module 1 disposed within the housing 5. The camera module 2 is used to capture license plate images, and the supplementary lighting module 1 is used to illuminate the license plate in low-light environments. The camera module 2 and the supplementary lighting module 1 are integrated into the housing 5, improving integration and simplifying the structure. Simultaneously, the camera module 2 and the supplementary lighting module 1 are controlled synchronously, resulting in better license plate recognition in dark environments. The supplementary lighting module 1 is positioned near the camera module 2, and the optional distance between the supplementary lighting module 1 and the camera module 2 is set between 0.5cm and 20cm. Specifically... Figure 2 As shown, the camera module light-incident surface 56 on the housing 5 is provided with a first light-transmitting sheet 3, and the supplementary light module light-emitting surface 55 on the housing 5 is provided with a second light-transmitting sheet 4. By setting the first light-transmitting sheet and the second light-transmitting sheet respectively, the light from the light-emitting surface of the supplementary light module can be prevented from entering the camera module area and interfering with the quality of the license plate image obtained by the camera module, thereby improving the license plate recognition effect when the lighting is poor.

[0031] Optionally, the light-incident surface 56 of the camera module and the light-exiting surface 55 of the supplementary light module are disposed on the same plane of the housing 5, and a non-transparent partition 53 is provided between the first light-transmitting sheet 3 and the second light-transmitting sheet 4; in this embodiment, the non-transparent partition 53 is a non-transparent protrusion 531, which is integrally formed with the housing 5, with simple process and low cost. The non-transparent protrusion 531 surrounds the camera module receiving hole 52, and the non-transparent protrusion 531 separates the light-incident surface 56 of the camera module and the light-exiting surface 55 of the supplementary light module, so that the light emitted from the light-exiting surface 55 of the supplementary light module cannot enter the light-incident surface 56 of the camera module, avoiding stray light interference and greatly improving the recognition effect of the camera module 2.

[0032] Optionally, the front of the housing 5 is provided with a camera module receiving hole 52 and a supplementary light module receiving hole 51. A non-transparent protrusion 531 is provided between the camera module receiving hole 52 and the supplementary light module receiving hole 51 on the front of the housing 5. The non-transparent protrusion 531 divides the front of the housing 5 into a first part and a second part. The first light-transmitting sheet 3 covers the first part of the housing 5, and the second light-transmitting sheet 4 covers the second part of the housing 5. The camera module receiving hole 52 is located in the center of the housing 5, ensuring the optimal framing angle for the camera module 2. To improve license plate recognition, the supplementary lighting module receiving hole 51 is symmetrically arranged on both sides of the camera module receiving hole 52, which can supplement the license plate area from both sides to improve the license plate recognition effect. The camera module receiving hole 52 is arranged on the light-incident surface 56 of the camera module, and the supplementary lighting module receiving hole 51 is arranged on the light-outceasing surface 55 of the supplementary lighting module. A non-transparent partition 53 is provided between the light-incident surface 56 of the camera module and the light-outceasing surface 55 of the supplementary lighting module to block the light on the light-outceasing surface 55 of the supplementary lighting module from entering the light-incident surface 56 of the camera module, thus affecting the license plate recognition effect.

[0033] The non-opaque protrusion 531 divides the front of the housing 5 into a first part and a second part. The first part covers the area of ​​the camera module receiving hole 52 and is provided with a first light-transmitting sheet 3. The first light-transmitting sheet 3 can protect the camera module 2 set in the camera module receiving hole 52 from damage and contamination, and at the same time can increase the amount of light entering and improve the license plate recognition effect. The second part covers the area of ​​the supplementary light module receiving hole 51 and is provided with a second light-transmitting sheet 4. The second light-transmitting sheet 4 can include the supplementary light module 1 set in the supplementary light module receiving hole 51 from damage and contamination, and at the same time can increase the amount of light emitted, further improving the license plate recognition effect. The first light-transmitting sheet 3 and the second light-transmitting sheet 4 are separated by the non-opaque protrusion 531. The first light-transmitting sheet 3 is set inside the second light-transmitting sheet 4. The height of the non-opaque protrusion 531 is greater than the thickness of the first light-transmitting sheet 3 and the second light-transmitting sheet 4, which can effectively prevent the light from the area of ​​the supplementary light module 1 from entering the area of ​​the camera module 2 and interfering with the license plate recognition.

[0034] The size of the camera module receiving hole 52 is smaller than the size of the opaque protrusion 531, and the size of the camera module receiving hole 52 is larger than the size of the camera module 2. A light-incident surface 56 is formed between the camera module receiving hole 52 and the opaque protrusion 531. The light-incident surface 56 supports the installation of the first light-transmitting sheet 3. The size of the first light-transmitting sheet 3 matches the internal size of the opaque protrusion 531. The first light-transmitting sheet 3 is snapped into the interior of the opaque protrusion 531 and covers the area of ​​the light-incident surface 56. A frame 54 is provided around the front perimeter of the housing 5. A light-emitting surface 55 for the supplementary lighting module is formed between the opaque protrusion 531 and the frame 54. The light-emitting surface 55 for the supplementary lighting module is lower than the height of the opaque protrusion 531 and the frame 54. The light-emitting surface 55 of the supplementary lighting module provides support for the second light-transmitting sheet 4. The second light-transmitting sheet 4 is snapped between the frame 54 and the non-transparent protrusion 531 and covers the area of ​​the light-emitting surface 55 of the supplementary lighting module. The second light-transmitting sheet 4 is provided with a through hole 41 corresponding to the position of the non-transparent protrusion 531. The inner diameter of the through hole 41 matches the outer diameter of the non-transparent protrusion 531. The through hole 41 is used to accommodate the non-transparent protrusion 531 and the first light-transmitting sheet 3. The area of ​​the second light-transmitting sheet 4 corresponding to the area of ​​the supplementary lighting module 1 is also provided with a light-shielding area 42. The area of ​​the light-shielding area 42 is larger than the area of ​​the supplementary lighting module receiving hole 51, which can effectively block the light emitted by the supplementary lighting module 1. The light-shielding area 42 can block the light-emitting area of ​​the supplementary lighting module 1 to avoid interfering with the driver's vision.

[0035] Optionally, the light-incident surface 56 of the camera module and the light-emitting surface 55 of the supplementary light module are arranged in a stepped manner on one side of the housing 5, wherein the light-incident surface 56 of the camera module protrudes outward relative to the light-emitting surface of the supplementary light module 1, which can further improve the supplementary light effect and the license plate recognition effect; Optionally, the light-emitting surface 55 of the supplementary light module protrudes outward relative to the light-incident surface 56 of the camera module.

[0036] Optional, specifically as follows Figure 3 As shown, there are two supplementary lighting modules 1, which are respectively located on both sides of the camera module 2.

[0037] Optionally, the second light-transmitting sheet 4 is provided with a light-shielding area 42, which is used to block the light propagating from the outside to the inside of the light-emitting area of ​​the supplementary lighting module 1. By providing a light-shielding area 42 in the second light-transmitting sheet 4, the stimulation of the supplementary lighting to the driver's eyes is reduced when supplementary lighting is required due to insufficient lighting in the parking lot. At the same time, the light-shielding area 42 also blocks the light propagating from the outside to the inside of the light-emitting area of ​​the supplementary lighting module 1, which helps to hide the supplementary lighting module 1 and greatly improves the adaptability of the device.

[0038] Optionally, the light-shielding area 42 is coated with one or more layers of translucent film.

[0039] Optionally, the light-shielding area 42 is fitted with one or more layers of translucent film.

[0040] Optionally, the matrix layer of the second light-transmitting sheet 4 at the light-shielding area 42 is transparent, gray, or brown.

[0041] Specifically, such as Figure 6 As shown, a waterproof gasket 6 is provided on the back of the camera module 2. The waterproof gasket 6 is located inside the bottom shell 7. The bottom shell 7 is also provided with a wire hole 8. The bottom shell 7 and the housing 5 are connected and fixed. The outer periphery of the housing 5 facing the vehicle is installed inside a rainproof sunshade 9. The rainproof sunshade 9 can further improve the supplementary lighting effect, and at the same time, it can provide rain protection and improve reliability.

[0042] Example 2:

[0043] like Figure 4 As shown, the difference between this embodiment and embodiment 1 is that the supplementary lighting module 1 is set to 4 and arranged around the camera module 2, which can adapt to different lighting environments; the light-blocking area 42 on the second light-transmitting sheet 4 is also changed accordingly; in some embodiments, the number of supplementary lighting modules 1 can be changed to adopt a surrounding arrangement to adapt to different lighting environments, so that the supplementary lighting module 1 does not interfere with the camera module 2 and can improve the license plate recognition effect.

[0044] Example 3:

[0045] like Figure 5 As shown, the difference between this embodiment and embodiment 1 is that the supplementary light module 1 is set to 9 and is set on one side of the camera module 2. The light-blocking area 42 on the second light-transmitting sheet 4 is also changed accordingly, which can adapt to different lighting environments. In some embodiments, the number of supplementary light modules 1 can be changed and a single-sided arrangement can be adopted to adapt to different lighting environments, so that the supplementary light module 1 does not interfere with the camera module 2 and can improve the license plate recognition effect.

[0046] The above is only used to illustrate the technical solution of the present invention and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of the present invention, as long as they do not depart from the spirit and scope of the technical solution of the present invention, should be covered within the scope of the claims of the present invention.

Claims

1. A license plate recognition camera device with light compensation and anti-glare interference, characterized in that, It includes a housing (5) and a camera module (2) and a fill light module (1) disposed within the housing (5); the camera module (2) is used to capture license plate images, and the fill light module (1) is used to illuminate the license plate in a low-light environment; the fill light module (1) is disposed near the camera module (2), and a first light-transmitting sheet (3) is provided on the light-incident surface (56) of the camera module on the housing (5), and a second light-transmitting sheet (4) is provided on the light-exiting surface (55) of the fill light module on the housing (5).

2. The license plate recognition camera of claim 1, wherein, The light-incident surface (56) of the camera module and the light-outceasing surface (55) of the supplementary light module are disposed on the same plane of the housing (5), and a non-transparent partition (53) is provided between the first light-transmitting sheet (3) and the second light-transmitting sheet (4).

3. The license plate recognition camera of claim 2, wherein, The front of the housing (5) is provided with a camera module receiving hole (52) and a supplementary light module receiving hole (51). A non-transparent protrusion (531) is provided between the camera module receiving hole (52) and the supplementary light module receiving hole (51) on the front of the housing (5). The non-transparent protrusion (531) divides the front of the housing (5) into a first part and a second part. The first light-transmitting sheet (3) covers the first part of the housing (5), and the second light-transmitting sheet (4) covers the second part of the housing (5).

4. The license plate recognition camera of claim 1, wherein, The light-incident surface (56) of the camera module and the light-outceasing surface (55) of the supplementary light module are arranged in a stepped manner on one side of the housing (5); The light-incident surface (56) of the camera module protrudes outward relative to the light-outceasing surface (55) of the supplementary lighting module; or, The light-emitting surface (55) of the supplementary light module protrudes outward relative to the light-incident surface (56) of the camera module.

5. The license plate recognition camera of claim 1, wherein, The supplementary lighting module (1) has two parts, which are respectively located on both sides of the camera module (2).

6. The license plate recognition camera of claim 1, wherein, Multiple supplementary lighting modules (1) are provided and arranged around the camera module (2).

7. The license plate recognition camera of claim 1, wherein, The supplementary lighting module (1) is provided in several units and is located on one side of the camera module (2).

8. The license plate recognition camera of claim 1, wherein, The second light-transmitting sheet (4) is provided with a light-shielding area (42), which is used to block the light from the outside to the inside of the light-emitting area of ​​the supplementary light module (1).

9. The license plate recognition camera of claim 8, wherein, The light-shielding area (42) is coated with one or more layers of translucent film.

10. The license plate recognition camera of claim 8, wherein, The light-shielding area (42) is covered with one or more layers of semi-transparent film.

11. The license plate recognition camera of claim 8, wherein, The matrix layer of the second light-transmitting sheet (4) in the light-shielding area (42) is transparent, gray, or brown.

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