License plate recognition device based on vehicle-mounted terminal

Abstract

The utility model relates to the technical field of vehicle-mounted terminal equipment, in particular to a license plate recognition device based on a vehicle-mounted terminal, which comprises a vehicle-mounted terminal shell, a base and an environment sensing unit, the base and the environment sensing unit are positioned at the bottom of the vehicle-mounted terminal shell, and a visible light camera and an infrared camera are respectively arranged on the front end face of the vehicle-mounted terminal shell from left to right. An installation cavity is formed in the lower portion of the interior of the vehicle-mounted terminal shell, two kneading blocks are kneaded again during disassembly, two clamping plates are driven to be retracted into the vehicle-mounted terminal shell again, then the vehicle-mounted terminal shell can be taken down upwards, disassembly and assembly are convenient, the structure is simple, overhaul and maintenance are convenient, by arranging an illumination sensor and a rainfall sensor, the external environment is conveniently monitored, and the practicability is high. The sunlight exposure outside the vehicle is sensed through the illumination sensor, the rainfall condition outside the vehicle is sensed through the rainfall sensor, control information of turning on and turning off is provided for selecting the visible light camera and the infrared camera, so that license plate recognition is better carried out, the recognition rate in severe weather is high, and the environmental adaptability is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle terminal equipment technical field, concretely is a license plate recognition device based on vehicle terminal. BACKGROUND

[0002] Vehicle terminal is the front end equipment of vehicle monitoring management system, also can be called vehicle dispatching monitoring terminal (TCU terminal). Vehicle terminal equipment is mainly composed of vehicle video server, LCD touch screen, external camera, talk handle, car burglar alarm and various external equipment;

[0003] In the vehicle use process, the accident may occur, the traditional vehicle terminal cannot recognize the license plate, thereby cannot track the person who causes the accident, so the loss caused by the accident can only let the owner buy a single, causes the loss in time and money to the owner, and the vehicle terminal is usually connected and fixed through multiple bolts when installing, causes very inconvenient when disassembling, is not favorable to the later maintenance, and when encountering bad weather (rain fog / dim light), it is inconvenient to recognize the license plate, reduces the working efficiency. UTILITY MODEL CONTENT

[0004] The utility model discloses a license plate recognition device based on vehicle terminal has convenient dismounting, simple structure, is convenient for overhauling and maintaining, can better carry out license plate recognition, and the recognition rate is high under bad weather, improves the characteristics such as environmental adaptability.

[0005] In order to achieve the above object, the utility model provides the following technical scheme: a license plate recognition device based on vehicle terminal, including vehicle terminal shell, the base at the bottom of vehicle terminal shell and environmental perception unit, the front end of vehicle terminal shell is provided with visible light camera and infrared camera from left to right respectively, the inside lower portion of vehicle terminal shell is provided with installation cavity, the inside left and right sides of installation cavity are all slidably connected with the clamping plate extending to the outside of vehicle terminal shell, the opposite end of two clamping plates is all fixedly connected with the connecting plate, the inside bottom center of installation cavity is fixedly connected with the fixed plate, the spring is all fixedly connected between two connecting plates and fixed plate;

[0006] The outer wall of base is provided with rectangular groove, the inner side of rectangular groove is fixedly connected with support frame, the inner wall left and right sides of rectangular groove are all provided with the clamping groove matched with clamping plate.

[0007] In order to conveniently drive two clamping plates to move, as a kind of license plate recognition device based on vehicle terminal of the utility model, the front end of two connecting plates is all fixedly connected with pinch block, the lower portion of the front end of vehicle terminal shell is provided with the strip slot communicated with installation cavity, two pinch blocks all extend to the outside of vehicle terminal shell through strip slot.

[0008] In order to facilitate the perception of the environment, as a kind of license plate recognition device based on vehicle terminal of the utility model preferably, the environmental perception unit includes the light sensor and rainfall sensor installed on the external vehicle body.

[0009] In order to light, as a kind of license plate recognition device based on vehicle terminal of the utility model preferably, the front end of the vehicle terminal shell is provided with two light supplement lamps above the visible light camera and infrared camera.

[0010] In order to facilitate the identification of license plate, as a kind of license plate recognition device based on vehicle terminal of the utility model preferably, the inside of the vehicle terminal shell is provided with ARM processor, the visible light camera, infrared camera, light sensor, light supplement lamp and rainfall sensor are all electrically connected with ARM processor.

[0011] In order to facilitate the installation of the base, as a kind of license plate recognition device based on vehicle terminal of the utility model preferably, the outer wall of the base is fixedly connected with two mounting blocks on the left and right sides, and mounting holes are formed in the outer wall of the mounting block.

[0012] Compared with the prior art, the utility model has the advantages that:

[0013] Two pinch blocks move relatively, so that two clamping plates are retracted into the inside of the vehicle terminal shell, then the entire vehicle terminal shell is clamped into the inside of the rectangular groove, the supporting frame is positioned and supported from the bottom, then the hand is loosened, because the spring is extruded and shrunk when the clamping plate is retracted, so the two springs are reset at this time, so that two clamping plates move synchronously and oppositely, at this time, two clamping plates are clamped into the inside of two clamping grooves, so that the vehicle terminal shell is positioned and locked, the installation of the vehicle terminal shell is realized, when disassembling, only pinch two pinch blocks again, drive two clamping plates to retract into the vehicle terminal shell again, the vehicle terminal shell can be taken out upward, convenient to disassemble and assemble, simple structure, easy to overhaul and maintain.

[0014] The ARM processor is convenient for receiving the detection signals of the light sensor and the rainfall sensor, and controlling the selection of the visible light camera or the infrared camera after analysis and processing, so as to select different cameras for license plate recognition according to different harsh environments, improve environmental adaptability, and control the light supplement lamp to work, through the setting of the light sensor and the rainfall sensor, the external environment is monitored, the sunlight irradiation outside the vehicle is perceived through the light sensor, and the rainfall outside the vehicle is perceived through the rainfall sensor, which provides the control information for the selection of the visible light camera and the infrared camera to open and close, so as to better perform license plate recognition, improve the recognition rate in bad weather, and improve the environmental adaptability. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 It is the whole external main view structure of the utility model;

[0016] Fig. 2 It is the section view structure of the utility model vehicle terminal shell;

[0017] Fig. 3 It is the three-dimensional structure diagram of the utility model base.

[0018] In the drawing: 1, vehicle terminal shell; 2, base; 3, visible light camera; 4, infrared camera; 5, installation cavity; 6, clamping plate; 7, connecting plate; 8, fixed plate; 9, spring; 10, rectangular slot; 11, support frame; 12, clamping groove; 13, pinch block; 14, strip slot; 15, light supplement lamp; 16, mounting block; 17, mounting hole. DETAILED DESCRIPTION

[0019] Please refer to Figs. 1 to 3 A license plate recognition device based on vehicle terminal, including vehicle terminal shell 1, located at the bottom of vehicle terminal shell 1 base 2 and environmental perception unit, the front end of vehicle terminal shell 1 is provided with visible light camera 3 and infrared camera 4 from left to right respectively, the inside lower part of vehicle terminal shell 1 is provided with installation cavity 5, the inside left and right sides of installation cavity 5 are slidably connected with clamping plate 6 extending to the outside of vehicle terminal shell 1, the opposite end of two clamping plates 6 is fixedly connected with connecting plate 7, the inside bottom center of installation cavity 5 is fixedly connected with fixed plate 8, the spring 9 is fixedly connected between two connecting plates 7 and fixed plate 8.

[0020] The outer wall of base 2 is provided with rectangular slot 10, the inner side of rectangular slot 10 is fixedly connected with support frame 11, the inner wall left and right sides of rectangular slot 10 are provided with clamping groove 12 matched with clamping plate 6.

[0021] In the embodiment: vehicle terminal shell 1 is detachably connected at the upper end of base 2, when installing, by installing and fixing base 2 in the inside of vehicle body, the installation and fixing of vehicle terminal shell 1 are realized, when installing vehicle terminal shell 1, first pinch two pinch blocks 13 with hands, two pinch blocks 13 move oppositely, so as to drive two clamping plates 6 to be retracted into the inside of vehicle terminal shell 1, then clamp the whole vehicle terminal shell 1 bottom into the inside of rectangular slot 10, support frame 11 supports and limits it from the bottom, then release hands, because the spring 9 is extruded and shrunk when clamping plate 6 is retracted, at this time, two springs 9 reset, so as to drive two clamping plates 6 to move oppositely synchronously, at this time, two clamping plates 6 are clamped into the inside of two clamping grooves 12 respectively, so as to limit and lock vehicle terminal shell 1, realize the installation of vehicle terminal shell 1, when disassembling, only need to pinch two pinch blocks 13 again, drive two clamping plates 6 to retract into vehicle terminal shell 1 again, then take vehicle terminal shell 1 upwards, it is convenient to disassemble and assemble, the structure is simple, and it is convenient to overhaul and maintain.

[0022] As a technical optimization scheme of the utility model, the front end surface of the two connecting plates 7 is fixedly connected with a kneading block 13, a strip-shaped groove 14 communicating with the mounting cavity 5 is formed in the lower part of the front end surface of the vehicle terminal shell 1, and the two kneading blocks 13 extend to the outside of the vehicle terminal shell 1 through the strip-shaped groove 14.

[0023] In the embodiment, the two kneading blocks 13 extend to the outside of the vehicle terminal shell 1 through the strip-shaped groove 14, so that the movement of the two kneading blocks 13 can be controlled from the outside.

[0024] As a technical optimization scheme of the utility model, the environment sensing unit comprises an illumination sensor and a rainfall sensor mounted on the external vehicle body.

[0025] In the embodiment, the illumination sensor and the rainfall sensor are arranged to facilitate the monitoring of the external environment, the illumination sensor senses the amount of sunlight outside the vehicle, and the rainfall sensor senses the amount of rainfall outside the vehicle, thereby providing control information for the opening and closing of the visible light camera 3 or the infrared camera 4, so that the license plate recognition is better, the recognition rate is high in bad weather, and the environmental adaptability is improved.

[0026] As a technical optimization scheme of the utility model, the front end surface of the vehicle terminal shell 1 is provided with two light supplementing lamps 15 located above the visible light camera 3 and the infrared camera 4.

[0027] In the embodiment, the light supplementing lamp 15 is arranged to facilitate irradiation and light supplementing in the case of insufficient light.

[0028] As a technical optimization scheme of the utility model, an ARM processor is arranged in the vehicle terminal shell 1, and the visible light camera 3, the infrared camera 4, the illumination sensor, the light supplementing lamp 15 and the rainfall sensor are electrically connected with the ARM processor.

[0029] In the embodiment, the ARM processor is convenient for receiving the detection signals of the illumination sensor and the rainfall sensor, and controlling the selection of the visible light camera 3 or the infrared camera 4 after analysis and processing, so as to select different cameras for license plate recognition in different harsh environments and improve the environmental adaptability, and the ARM processor is convenient for controlling the light supplementing lamp 15 to work.

[0030] As a technical optimization scheme of the utility model, the outer wall of the base 2 is fixedly connected with two mounting blocks 16 on the left and right sides, and mounting holes 17 are formed through the outer wall of the mounting block 16.

[0031] In the embodiment, the outer wall of the mounting block 16 is provided with the mounting hole 17, so that the base 2 can be conveniently mounted and fixed in the vehicle body.

[0032] Working principle: the vehicle terminal shell 1 is detachably connected to the upper end of the base 2, when installing, the base 2 is fixedly installed in the vehicle body, thereby realizing the installation and fixation of the vehicle terminal shell 1, and when installing the vehicle terminal shell 1, the user first pinches the two pinch blocks 13, the two pinch blocks 13 move relative to each other, thereby driving the two clamping plates 6 to be retracted into the inside of the vehicle terminal shell 1, then the bottom of the entire vehicle terminal shell 1 is clamped into the inside of the rectangular groove 10, the supporting frame 11 supports and limits it from the bottom, then the hand is loosened, since the spring 9 is extruded and contracted when the clamping plate 6 is retracted, the two springs 9 are reset, thereby driving the two clamping plates 6 to move synchronously and oppositely, at this time, the two clamping plates 6 are clamped into the inside of the two clamping grooves 12, thereby limiting and locking the vehicle terminal shell 1, realizing the installation of the vehicle terminal shell 1, when disassembling, only the two pinch blocks 13 are pinched again, the two clamping plates 6 are retracted into the vehicle terminal shell 1 again, and the vehicle terminal shell 1 can be taken out upward;

[0033] The ARM processor is convenient for receiving detection signals of the light sensor and the rainfall sensor, and controlling selection of the visible light camera 3 or the infrared camera 4 after analysis and processing, so as to select different cameras for license plate recognition according to different harsh environments, improve environmental adaptability, and control the light supplement lamp 15 to work, the light sensor and the rainfall sensor are arranged, the external environment is monitored, the light sensor senses the sunlight irradiation outside the vehicle, the rainfall sensor senses the rainfall outside the vehicle, control information for starting or stopping the visible light camera 3 or the infrared camera 4 is provided, so that license plate recognition is better, and environmental adaptability is improved.

[0034] The above is only a preferred embodiment of the utility model, and is not used to limit the utility model, and any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A vehicle license plate recognition device based on a vehicle terminal, comprising a vehicle terminal shell (1), a base (2) located at the bottom of the vehicle terminal shell (1), and an environment perception unit, characterized in that: The front end face of the vehicle terminal shell (1) is provided with a visible light camera (3) and an infrared camera (4) from left to right, respectively, a mounting cavity (5) is opened below the inside of the vehicle terminal shell (1), the inside of the mounting cavity (5) is slidably connected with a clamping plate (6) extending to the outside of the vehicle terminal shell (1) on the left and right sides, the opposite end of the two clamping plates (6) is fixedly connected with a connecting plate (7), the inside bottom end of the mounting cavity (5) is fixedly connected with a fixed plate (8), the spring (9) is fixedly connected between the two connecting plates (7) and the fixed plate (8). The outer wall of the base (2) is provided with a rectangular groove (10), the inner side of the rectangular groove (10) is fixedly connected with a supporting frame (11), the inner wall of the rectangular groove (10) is provided with a clamping groove (12) matched with the clamping plate (6) on the left and right sides.

2. The vehicle license plate recognition device based on vehicle terminal according to claim 1, characterized in that: The front end face of the two connecting plates (7) is fixedly connected with a kneading block (13), the front end face of the vehicle terminal shell (1) is provided with a strip-shaped groove (14) communicated with the mounting cavity (5) below, the two kneading blocks (13) extend to the outside of the vehicle terminal shell (1) through the strip-shaped groove (14).

3. The vehicle license plate recognition device based on vehicle terminal according to claim 1, characterized in that: The environmental perception unit includes an illumination sensor and a rain sensor mounted on the external vehicle body.

4. The vehicle-mounted terminal-based license plate recognition device of claim 3, wherein: The front end face of the vehicle terminal shell (1) is provided with two light supplement lamps (15) above the visible light camera (3) and the infrared camera (4).

5. The vehicle-mounted terminal-based license plate recognition device of claim 4, wherein: The inside of the vehicle terminal shell (1) is provided with an ARM processor, the visible light camera (3), the infrared camera (4), the illumination sensor, the light supplement lamp (15) and the rain sensor are electrically connected with the ARM processor.

6. The vehicle license plate recognition device based on vehicle terminal according to claim 1, characterized in that: The outer wall of the base (2) is fixedly connected with two mounting blocks (16) on the left and right sides, the outer wall of the mounting block (16) is provided with a mounting hole (17).

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