KR200494088Y1 - Camera with car number indentification and security fucntion - Google Patents

Abstract

The present invention relates to a camera having a vehicle number identification and security function. An infrared cutoff filter 4 that passes only a signal of 600 nm or less in one sensing signal, an amplifier 6 that amplifies a signal that has passed the infrared cutoff filter 4, and a signal that has passed through the amplifier for security or MPU (control unit) 8, which is determined and processed according to whether it is for vehicle number identification, a current amplifier 10 that amplifies a signal according to a control signal by the MPU (control unit) 8, and the current amplifier ( 10) includes an LED projector 12 that projects light according to the signal amplified by the LED projector 12, wherein the lens 2 and the optical sensor 3 identify the vehicle LIGHT at night through the MPU control device, and the instantaneous LED projector ( 12) increases the current to take a picture of the car number, and if the car comes in with the light turned off, it is controlled to identify the car number through the MPU control device, so that it is possible to shoot the car number even with the brightness for security.

Description

Camera with car number identification and security function {CAMERA WITH CAR NUMBER INDENTIFICATION AND SECURITY FUCNTION}

The present invention relates to a camera having a vehicle number identification and security function, and more specifically, by controlling the amount of current supplied for the operation of the camera, but controlling the low current and high current state according to the sensing signal through the optical sensor through the control device It relates to a camera equipped with a new type of vehicle number identification and security function that performs a security function at night by controlling and at the same time a vehicle is recognized by changing the amount of current to identify the number of the vehicle.

Parking access control systems are widely used. The parking access control system is a system for managing a parking lot, and in particular, based on the recognition of vehicles entering and exiting the parking lot, the time of entry, etc., it is a system capable of controlling and charging the parking fee when parking the vehicle.

The parking access control system is configured to include a blocking bar, a camera, a floodlight, a vehicle number recognizer, etc. at the entrance to recognize the vehicle number of a vehicle entering or exiting, and control the blocking bar accordingly to allow entry or exit.

On the other hand, the camera is a device for car number identification. Usually, LED floodlights are provided separately or integrally.

However, such a conventional camera has a problem in that it is difficult to identify a car number at night or in an environment where light is reflected. In addition, most of them did not have security functions other than number identification.

[Prior Patent Literature]

Republic of Korea Patent Registration No. 10-2036548 (registered on November 11, 2019) (Title of the invention: vehicle recognition camera and vehicle recognition system)

The present invention is to improve the problems in the prior art as described above, by controlling the amount of current supplied for the operation of the camera, but controlling the low current and high current state through the control device according to the sensing signal through the optical sensor. It is to provide a camera equipped with a new type of vehicle number identification and security function that performs a security function in the vehicle and can identify the number of the vehicle by changing the amount of current when the vehicle is recognized.

According to an embodiment of the present invention for achieving the above object, a camera having a vehicle number identification and security function is

In the camera having a vehicle number identification and security function,

a lens (2) that collects light;

An optical sensor (3) for sensing the amount of light incident through the lens (2),

An infrared cutoff filter (4) that passes only a signal of 600 nm or less in the sensing signal that has passed through the photosensor;

an amplifier (6) for amplifying the signal passing through the infrared cut-off filter (4);

MPU (control unit) 8, which determines whether the signal passing through the amplifier is for security or vehicle number identification and controls the amount of current for security or vehicle number identification to be transmitted differently;

a current amplifier 10 for amplifying a signal according to a control signal by the MPU (control unit) 8; and

and an LED projector 12 for projecting light according to the signal amplified by the current amplifier 10,

The MPU (control unit) 8 is

When the lens (2) and the optical sensor (3) identify a car at night, the current is increased in the instantaneous LED floodlight 12 to photograph and recognize the car number, and when the car is not identified, the LED floodlight ( 12), by reducing the current to perform the security function, it is characterized in that the amount of current for security and the amount of current for identification of car number are separated and controlled to be provided to the LED floodlight,
The MPU (control unit) takes pictures of the license plate at 1/2 hour intervals in the vehicle license plate recognition process, but one of the two LED light output is bright once and the other is a vehicle with a brightness with a lower current level than the brightness in the security process. It is characterized in that it is provided by photographing the license plate.

In addition, according to the present invention, a camera is provided with a vehicle number identification and security function, characterized in that it is operated by using solar battery power as a supply power.

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As described above, according to the camera having a vehicle number identification and security function according to the present invention, the LED light quantity is increased when the vehicle number is identified, and the LED light quantity is reduced for security purposes to reduce the current flowing through the LED. It has the effect of improving heat and LED lifespan. In addition, there is an effect that can be used for vehicle number identification and security with a small amount of current.

In addition, as another example of power supply, there is an effect that can be operated by power supply of a solar battery through a solar panel.

1 is a schematic configuration diagram of a camera having a vehicle number identification and security function according to the present invention.
FIG. 2 is a detailed block diagram of the camera of FIG. 1 .
3 is a waveform diagram showing the relationship between the light sensor signal of the camera equipped with the vehicle number identification and security function of FIG. 1 and the current amount of the LED emitter.

Since the present invention can have various changes and can have various embodiments, specific embodiments are illustrated in the drawings and described in detail.

However, this is not intended to limit the present invention to a specific embodiment, it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention.

The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present application, terms such as “comprise” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It should be understood that it does not preclude the possibility of the presence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related art, and should not be interpreted in an ideal or excessively formal meaning unless explicitly defined in the present application. does not

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings. In describing the present invention, in order to facilitate the overall understanding, the same reference numerals are used for the same components in the drawings, and repeated descriptions of the same components are omitted.

Hereinafter, an embodiment of a camera having a vehicle number identification and security function according to the present invention will be described in detail with reference to the accompanying drawings. In the following process, the description of the functions of well-known components such as a synchronization signal generator of a general CCTV camera (there is also a projector integrated) will be omitted and will be described focusing on the characteristic parts of the present invention.

1 is a schematic configuration diagram of a camera having a vehicle number identification and security function according to the present invention, FIG. 2 is a detailed block diagram of the camera of FIG. 1, and FIG. 3 is a vehicle number identification and security function of FIG. It is a waveform diagram showing the relationship between the light sensor signal of the camera equipped with the LED and the current amount of the LED emitter.

1 to 3, the camera 100 having a vehicle number identification and security function according to the present invention can be used for vehicle number identification and security at night.

Looking at the photographing area in FIG. 1 , there is a number photographing area in front of the sensor area, and the vehicle number is photographed through the camera 100 . The camera 100 is provided with an optical sensor 3 .

In case of car number identification, increase the amount of light of the LED emitter (described below).

For security purposes, since the current flowing through the LED is supplied with a low current, the light quantity of the LED floodlight is reduced, so heat generation in the LED and the lifespan of the LED can be improved.

According to the present invention, even with a small amount of current, a security function is possible, and when a vehicle is identified, the amount of current is increased to identify the vehicle number.

Referring to FIG. 2 , the camera 100 includes a lens 2 for condensing light, an optical sensor 3 for sensing the amount of light incident through the lens 2, and 600 nm or less from the sensing signal passing through the optical sensor. Infrared cutoff filter 4 that passes only the signal of, amplifier 6 that amplifies the signal passing through the infrared cutoff filter 4, and whether the signal passing through the amplifier is for security or car number identification A current amplifier 10 amplifying a signal according to a control signal by the MPU (control unit) 8 and the MPU (control unit) 8, which is determined and processed according to the process, and the signal amplified by the current amplifier 10 Includes an LED projector 12 for projecting light in accordance with. The MPU (control unit) 8 may be added with a knob-type setting device so that the current setting for security and the current setting for vehicle number identification can be artificially set to the outside in an offline state. For example, the user can set the security current to 700mA or 1A, and the vehicle number identification current can also be set to 3A, which is higher than 2A to identify a license plate from a distance. In this set state, the MPU (control unit) 8 determines whether it is for security or car number recognition according to the signal recognized through the optical sensor, and transmits the set amount of current to the current amplifier 10 only at that time. (MPU ( A D/A converter (not shown) in the control device) 8 may transmit a current of 700mA or 1A for security, or may transmit a current of 2A or 3A for identification of a vehicle number).

car identification

The lens (2) and the optical sensor (3) identify the car LIGHT at night and increase the current in the instantaneous LED projector 12 to capture the car number and recognize it.

If the car comes in with the LIGHT off, it can recognize the car even with the security brightness and increase the current to take the car number.

In the present invention, since current consumption is small (low amount of current), it is possible to drive the camera 100 by receiving power supply using a battery charged using a solar cell.

In the past, because a large amount of current is used at night (because the LED driving current must flow as much as possible), the camera becomes useless if discharged in the middle, so a solar cell cannot be used as a power supply.

This design is used for security while passing a very small current, and because high current flows only when a car comes in, power consumption is small, so power supply using a solar panel is possible.

In addition, in the present invention, the light sensor can be rotated (not shown), and when a vehicle is sensed in a sensing area recognizable by the light sensor, the LED is then controlled to be brighter than the security state for about 1 to 2 seconds.

In the case of a camera including an LED floodlight, usually the light sensor senses the vehicle's light, but also senses day and night, so it is usually on from sunset to before sunrise, and the LED is operated for security.

Usually, 220V commercial power is converted to 12V by an adapter to the camera. Of course, such a power source may be used in the present invention, but this is not a limitation.

In addition, as another example of power supply, it is possible to supply power to a photovoltaic battery through a photovoltaic panel. It is possible because it is (Existing cameras always emit light at the maximum amount, so the supply of DC power through the battery power of the solar panel as in the present invention cannot handle the camera, which must have a large amount of power supply. The battery in the panel could not be used).

The key keywords in this design are nighttime, low current, change of light quantity, light sensor, and automatic security status maintenance. If a current of 1A is required in the security state, it is controlled so that a current of 2A flows only for a short time (only about 1 to 2 seconds) when the car is turned on.

The biggest feature of the present invention is that it controls the amount of light to change proportionally according to the current, which is a low-current security function, which can keep the LED lifespan long with low heat. It is turned off and turned on so that the LED can maintain its security function even with a low current.

Referring to FIG. 3 , if a car enters one after another, the amount of current is increased by the operation of the MPU (control unit), so that the number recognition of the license plate can be performed for about 1 to 2 seconds. also. For example, if a car is recognized, but it may be a street lamp, or a car may be standing, if another car enters in succession (the light sensor continues to output a vehicle recognition sensing signal), then the light sensor again When the vehicle is recognized and the sensing signal is output, the current amount of the LED floodlight is increased again at that time to perform the number recognition of the license plate for about 1 to 2 seconds. (The lower part in FIG. 3 shows the amount of current of the LED floodlight, and the amount of current is proportional to the intensity of the current). After all, according to the present invention, rather than continuously flowing a high amount of current, the process of maintaining a secure state with a low current supplied, allowing a high current to be supplied only for a few seconds, turning off the high current supply again, and allowing a low current to be supplied repeated at night. This process is processed as a program in the MPU device.

A characteristic feature of the present invention is that it can be operated even with a low amount of current. Usually, the reason the LED lifespan of LED floodlights is short is that it operates to provide a bright area by maximizing the brightness at night. In the case of sending a high current for a second, there is an effect that the lifespan can be increased by 4 times or more compared to the existing LED floodlight.

In addition, the role of the filter is that the light sensor of 740 nm emitted from the LED of the LED projector is reflected from the object and the light that enters the lens can be recognized by the photosensor. plays a role

Referring to FIG. 3 , the optical sensor generates a sensing signal not only for recognizing a vehicle but also for recognizing an additionally entering vehicle (of course, the strength of the sensing signal may be different. It is assumed that two cars are consecutive).

On the other hand, the amount of current of the LED floodlight is greater for vehicle number identification than for security (to identify vehicle license plate number).

On the other hand, although not shown, in the case of an electric vehicle with a reflective license plate attached, a phenomenon in which the number cannot be identified through the vehicle license plate image reflected while the LED floodlight is illuminated when the light is on (a.k.a. whitening phenomenon) may also occur In order to prepare for such a case of whitening, when a car enters the sensing area, a large amount of current flows through the LED floodlight and the vehicle number can be recognized. At this time, the MPU (control unit) Under the control of (8), once an image is taken brightly through a large amount of current, and again in succession, the LED of the LED emitter 12 emits light with an amount of current smaller than the amount of current in the security step in FIG. ) to record the video. That is, the image is saved by taking a picture at 0.5 second intervals, once brightly and once with a brightness of less current than the security state. This prevents the vehicle license plate recognition impossibility due to bleaching. When saving the image, only the image of the vehicle license plate recognized can be saved as a license plate image. Therefore, in this case, it can be seen that the magnitude of the amount of current is divided into three stages. Assuming that the license plate cannot be recognized due to bleaching, the short time of the license plate recognition process is divided into 1/2 sections in advance, and the technique of shooting brightly and once less brightly is programmatically controlled.

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As described above, according to the present invention, according to the present invention, by a camera equipped with a vehicle number identification and security function, in the case of identification of a vehicle number, the current flowing through the LED is increased by increasing the current rather than for security, and by reducing the amount of LED light for security. LED lifespan can be improved by preventing problems caused by heat generation in the LED. In addition, there is an effect that can be used for vehicle number identification and security with a small amount of current.

As described above, the best embodiment has been disclosed in the drawings and the specification. Although specific terms are used herein, they are used only for the purpose of describing the present invention and are not used to limit the meaning or the scope of the present invention described in the claims. Therefore, it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible therefrom. Accordingly, the true technical protection scope of the present invention should be determined by the technical spirit of the appended claims.

2: Lens
3: Light sensor
4: Amplifier
6: Infrared cutoff (cufoff) filter (passes only wavelengths below 600 nm)
8: Amplifier
10: MPU (control unit)
12: LED floodlight
100: camera

Claims (3)

In the camera having a vehicle number identification and security function,
a lens (2) that collects light;
An optical sensor (3) for sensing the amount of light incident through the lens (2),
An infrared cutoff filter (4) that passes only a signal of 600 nm or less in the sensing signal that has passed through the photosensor (4);
an amplifier (6) for amplifying the signal passing through the infrared cut-off filter (4);
MPU (control unit) 8, which determines whether the signal passing through the amplifier is for security or vehicle number identification and controls the amount of current for security or vehicle number identification to be transmitted differently;
a current amplifier 10 for amplifying a signal according to a control signal by the MPU (control unit) 8; and
and an LED projector 12 for projecting light according to the signal amplified by the current amplifier 10,
The MPU (control unit) 8 is
When the lens (2) and the optical sensor (3) identify a car at night, the current is increased in the instantaneous LED floodlight 12 to photograph and recognize the car number, and when the car is not identified, the LED floodlight ( 12), by reducing the current to perform the security function, it is characterized in that the amount of current for security and the amount of current for identification of car number are separated and controlled to be provided to the LED floodlight,
The MPU (control unit) takes pictures of the license plate at 1/2 hour intervals in the vehicle license plate recognition process, but one of the two LED light output is bright once and the other is a vehicle with a brightness with a lower current level than the brightness in the security process. A camera equipped with a vehicle number identification and security function, characterized in that it provides by photographing the license plate. The method of claim 1,
A camera equipped with a vehicle number identification and security function, characterized in that it is operated by using solar battery power as the supply power.



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