KR20180024430A - Closed Circuit Television System for Police Car and Self-Healing Method for Initialization Error of Lens - Google Patents

Abstract

The present invention relates to a CCTV system for a police car and a method for automatically recovering a lens initialization error capable of additionally including a temperature sensor and a heater unit and automatically recovering an error state by performing a heater operation and lens initialization at a cryogenic temperature. The CCTV system for the police car comprises: a zoom lens integrated camera; an image sensor unit; a video signal converting unit; a video signal outputting unit; a motor driving unit; a system controlling unit; a temperature detecting unit; a lens initialization controlling unit; the heater unit; and a functional switch unit. The zoom lens integrated camera is provided on one side of a main body and photographs a light type image. The image sensor unit converts the light type image received through the zoom lens integrated camera into an electrical signal. The video signal converting unit converts the image, which is converted into the electrical signal through the image sensor unit, into a video signal and outputs the same. The video signal outputting unit outputs the image converted into the video signal through the video signal converting unit to the outside. The motor driving unit controls angles of a zoom lens and a focus lens of the zoom lens integrated camera. The system controlling unit controls the motor driving unit by receiving lens position information from the zoom lens integrated camera and controls the video signal converting unit. The temperature detecting unit detects the temperature of the main body. The lens initialization controlling unit receives temperature information detected in the temperature detecting unit; performs the lens initialization by outputting a controlling signal when the temperature information is lower than a reference value; and outputs a driving signal. The heater unit is operated by receiving the driving signal from the lens initialization controlling unit; and applies heat to the zoom lens integrated camera. The functional switch unit operates the system controlling unit.

Description

[0001] The present invention relates to a CCTV system for a police car and an automatic initialization error reset method for a lens,

The present invention relates to a police car CCTV system, and more particularly, to a police car CCTV system and a lens initialization error automatic recovery method capable of automatically recovering from an error state through heater operation and repetitive lens initialization during a cryogenic environment of a police car .

Generally, a closed circuit television (CCTV) system is widely used to monitor and receive images from a management area requiring security and safety such as a residential area, a department store, a bank, and an exhibition hall. In such a closed circuit television system, a camera device is provided for capturing an image in a management area and transmitting the captured image.

In recent years, closed circuit television systems have been used in vehicles such as automobiles, trains, trucks, and buses for the purpose of crime prevention, theft prevention, and accident prevention. In this case, the CCTV is installed in the vehicle to photograph the inside or outside situation of the vehicle.

This CCTV is widely used as a police car camera system in many countries of advanced countries such as the United States and it is used as evidence for judging the abuse of public authority in law enforcement frequently in recent years as well as evidence of crime .

In many countries including Korea, it is not mandatory to install CCTV in a police car, but it is increasing in the future.

Such a police car CCTV system has the effect of preventing traffic accidents and raising the arrest rate of criminals, securing the police and citizens, and minimizing unnecessary conflicts and reducing costs.

1 is a view schematically showing a CCTV system mounted on a general police car.

As shown in Fig. 1, a CCTV system 20 is mounted inside the police car 10 to photograph a front portion thereof. Thus, the CCTV system 20 installed inside the police car 10 acquires the video information of the front side by the operation of the driver or the passenger, and stores the video information or sends it to the outside.

2 is a block diagram schematically showing a conventional CCTV system for a police vehicle.

2, the police car CCTV system 20 according to the related art includes a camera 21 for capturing an image in the form of light, and a camera 21 for capturing an image of a light type incident through the camera 21 as an electric signal A video signal conversion section 23 for converting an image converted into an electrical signal through the image sensor 22 into a video signal and outputting the video signal, A video signal output unit 24 for outputting an image converted into a video signal to the outside, a motor driving unit 25 for adjusting the lens angle of the camera 21, lens position information from the camera 21 A control unit 26 for controlling the motor driving unit 25 and controlling the video signal converting unit 23 and a function switch unit 27 for operating the control unit 26 have.

The operation of the police car CCTV system according to the related art will now be described.

That is, FIG. 3 is a flowchart schematically illustrating a lens initialization error recovery method of a conventional CCTV system for a police vehicle.

As shown in FIG. 3, the method for restoring the lens initialization error of the police car CCTV system according to the related art turns on the vehicle to turn on the CCTV system (S10).

Then, the lens of the camera 21 is initialized (S20). At this time, the lens is composed of a zoom lens for performing a zoom operation and a focus lens for autofocus, and two kinds of lenses are organically operated during zoom operation to automatically focus on the zoom lens. When the power is applied, the lens initializing operation is performed to grasp the initial positions of the two types of lenses. The lens position is determined based on the reference point by moving the lens through the motor driving unit 25.

Then, it is determined whether the lens of the camera 21 is normally initialized (S30).

If the initialization of the lens of the camera 21 is not normally performed, a malfunction alarm is generated (S40). On the other hand, when the lens of the camera 21 is not initialized, the initialization is performed by repeatedly turning on / off the vehicle.

When the initialization of the camera lens is normally performed, the camera 21 is operated to capture a surrounding image (S50).

However, in the conventional CCTV system for a police car, when the zoom lens integrated camera is operated in a system where the power is normally turned off during a cryogenic outdoor environment and the power is applied at the same time as the vehicle starts, the lens is frozen due to cryogenic temperatures In order to solve this air problem, the police car was repeatedly turned on and off repeatedly, but it was not a usual solution.

In other words, the camera integrated with the zoom lens catches the reference point through the hall sensor to catch the reference point of the focus when the power is turned on. If the lens is frozen at the cryogenic temperature, the camera goes into the error mode. And did not work properly.

In addition, since the police radios and the police car cameras are used together at close range, the images are not normally recorded due to malfunction due to mutual electromagnetic interference.

Also, it is difficult to identify the face or the vehicle license plate located at a remote location, and the location of the police car is easily detected because of the need to turn on the interior light to operate the CCTV at night.

(Patent Literature 1) Patent Registration No. 10-1053939 (entitled "CCTV System for Crime prevention of Vehicle Using High-Resolution Camera and Image Processing Method Thereof"

(Patent Document 2) Patent Registration No. 10-0822017 (2008.05.07, entitled " Intelligent Monitoring System and Intelligent Monitoring Method Using CCTV "

SUMMARY OF THE INVENTION It is an object of the present invention to provide a police car CCTV system capable of automatically recovering from an error state by performing a heater operation and a lens initialization at a cryogenic temperature by additionally configuring a temperature sensor and a heater unit, And a method of automatically recovering a lens initialization error.

Another object of the present invention is to provide a police car CCTV system and a lens initialization error automatic recovery method that prevent electromagnetic interference between a radio and a CCTV in advance, prevent corrosion and enable recognition of a vehicle in low light .

According to another aspect of the present invention, there is provided a surveillance system for a police car, the surveillance system comprising: a zoom lens integrated camera configured to capture a light image formed on one surface of a main body; A video signal conversion unit for converting an image converted into an electrical signal through the image sensor unit into a video signal and outputting the converted video signal, and a video signal conversion unit for outputting an image converted into a video signal to the outside through the video signal conversion unit A motor driving unit for adjusting an angle of a zoom lens and a focus lens of the zoom lens integrated type camera, a control unit for controlling the motor driving unit by receiving lens position information from the zoom lens integrated camera, A system control unit for detecting a temperature inside the main body; A lens initialization control unit for receiving the temperature information detected by the temperature detection unit and outputting a control signal when the temperature information is lower than a reference value to initialize the lens and outputting a driving signal; And a function switch unit for operating the system control unit.

According to another aspect of the present invention, there is provided a method for restoring a lens initialization error in a police car CCTV system, comprising: turning on a vehicle to turn on a CCTV system; Initializing a lens of a zoom lens integrated camera of the CCTV system; Determining whether the lens of the zoom lens integrated camera has been normally initialized; If the lens initialization of the zoom lens integrated camera is not normally performed, detecting an ambient temperature using a temperature detector; Receiving the temperature information detected by the temperature detector, and comparing the detected temperature information with a reference value in the lens initialization control unit to determine whether it is in a cryogenic temperature state; And outputting a control signal for operating the heater unit when it is determined that the lens initialization control unit is at a cryogenic temperature to defrost the zoom lens integrated camera; And operating the zoom lens integrated camera to photograph a surrounding image when the zoom lens integrated camera is normally initialized.

The CCTV system for a police car and the method for automatically recovering a lens initialization error according to an embodiment of the present invention have the following effects.

First, a temperature sensor and a heater are additionally provided, so that the heater is operated at a cryogenic temperature and the lens is initialized repeatedly, so that the normal return time can be shortened automatically in an error state.

Second, by applying EMI gaskets to jack assemblies, it improves EMI performance, minimizing electromagnetic interference even when mounted on a police car like an adjacent radio.

Third, chromate coating on the surface of the body can prevent corrosion inside and outside the camera in salt and water environment.

Fourth, by configuring the LED operation button of the function switch section, it is possible to identify the button without illuminating the inside of the vehicle at night, so that the operation is convenient. When the night operation or patrol is made, the LED operation button The camera can be operated.

Fifth, it is possible to easily adjust the focal distance by enlarging the object at a distance and acquire a more accurate evidence image by mounting the auto zoom function by photographing the license plate.

1 is a view schematically showing a CCTV system mounted on a general police car;
2 is a block diagram schematically showing a conventional CCTV system for a police vehicle
3 is a flowchart schematically showing a lens initialization error recovery method of a police car CCTV system according to the related art
4 is a view showing an appearance of a police car CCTV system according to the present invention;
Figure 5 is a more detailed illustration of the jack assembly of Figure 4;
FIG. 6 is a block diagram schematically showing a police car CCTV system built in the main body of FIG.
7 is a flowchart schematically showing a lens initialization error recovery method of a police car CCTV system according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description and the accompanying drawings, detailed description of well-known functions or constructions that may obscure the subject matter of the present invention will be omitted. It should be noted that the same constituent elements are denoted by the same reference numerals as possible throughout the drawings.

The terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary meanings and the inventor is not limited to the meaning of the terms in order to describe his invention in the best way. It should be interpreted as meaning and concept consistent with the technical idea of the present invention. Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention, and not all of the technical ideas of the present invention are described. Therefore, It is to be understood that equivalents and modifications are possible.

FIG. 4 is a view showing an appearance of a police car CCTV system according to the present invention, and FIG. 5 is a more detailed view of the jack assembly of FIG.

As shown in FIG. 4, the police car CCTV system according to the present invention includes a main body 110 having a built-in police car CCTV system 200 in an inner space and having an outer appearance made of aluminum, A jack assembly 130 coupled to one side of the main body 110 to transmit image information obtained in the CCTV system to the outside, A silicon gasket 140 formed between the jack assembly 130 and the main body 110 to minimize external noise interference and a chromate agent 150 coated on the surfaces of the main body 110 and the cover 120. [ ).

Here, the gasket 140 is attached to the surface of the main body 110 to which the jack assembly 130 is connected or the jack assembly 130.

The chromate agent 150 is coated on the surface of the body 110 in a state where the body 110 and the cover 120 are coupled to each other. When the coating of the chromate agent 150 is completed, The CCTV system is mounted inside the cover 120, and then the cover 120 is assembled.

The chromate agent is prevented from being coated on the joint portion between the main body 110 and the cover 120 by coating the chromate agent 150 in a state where the main body 110 and the cover 120 are coupled to each other, There is a number.

The jack assembly 130 is connected to a video signal output unit described later. By applying a silicon gasket 140 to the jack assembly 130, noise interference with the radio can be minimized.

5, the jack assembly 130 includes a connecting member 131 connected to the outside, a bracket 132 coupled to the connecting member 131 and connected to the main body 110, A shield terminal 133 connected to the back surface of the bracket 132 and connected to the CCTV system 200 inside the main body through the connection terminal 131, A cable harness 134 connected to the connection member 131 and connected to the other surface of the bracket 132 and a ferrite core 135 connected to the cable harness 134.

Thus, the CCTV system can be effectively protected from external noise such as a radio wave through the gasket 140, the ferrite core 135, and the shield terminal 133 in the jack assembly 130.

FIG. 6 is a schematic view illustrating a police car CCTV system built in the main body of FIG.

As shown in FIG. 7, the police car CCTV system according to the present invention includes a zoom lens integrated type camera 210 configured to photograph a light type image on one surface of a main body 100, and a zoom lens integrated type camera 210 An image sensor unit 220 for converting an incident light type image into an electric signal, a video signal conversion unit 230 for converting an image converted into an electric signal through the image sensor unit 220 into a video signal, A video signal output unit 240 for externally outputting an image converted into a video signal through the video signal conversion unit 230, and a video signal output unit 240 for adjusting the angle of the zoom lens and the focus lens of the zoom- A system control unit 2 for controlling the motor driving unit 250 and controlling the video signal converting unit 230 by receiving the lens position information from the zoom lens integrated camera 210, A temperature detector 270 for detecting an internal temperature in real time including a zoom lens integrated type camera 210 formed in the main body of the main body 200; The lens initialization control unit 280 outputs a control signal to the lens initialization control unit 280 to initialize the lens and outputs a driving signal to the zoom lens integrated camera 210. The lens initialization control unit 280 receives the driving signal from the lens initialization control unit 280, A defrosting heater unit 290, and a function switch unit 300 for operating the system control unit 260.

Here, the zoom lens integrated camera 210 includes a zoom lens for zooming operation and a focus lens for autofocus. In the zoom lens integrated camera 210 having such a structure, the focus lens operates organically during operation of the zoom lens, and automatically focuses the zoom lens together with the zoom lens to take an image.

The zoom lens integrated camera 210 optically processes light from a subject using an optical system (OPS) having lenses and an infrared cut filter. The zoom lens is equipped with an auto zoom function, so that it is possible to easily adjust the focal distance by photographing a license plate, enlarge a subject at a distance, and obtain a more accurate evidence image.

The image sensor unit 220 receives the light incident through the zoom lens-integrated camera 210, captures an external environment, and generates image information. Here, the image sensor unit 220 may be an image sensor such as a CCD (Charge Coupled Device) or a CMOS (Complementary Metal-Oxide Semiconductor) or other imaging means.

Furthermore, the image sensor unit 220 may have a color filter array structure of a Bayer pattern. In this case, the Bayer pattern represents one color of red (R), green (G), and blue (B) in one pixel, and the surrounding pixel values are interpolated It is a way to express two colors.

In addition, the image sensor unit 220 may be configured to output an image pickup signal in accordance with a full HD resolution (1920 × 1080) standard, and a vertical resolution of 1200, which is greater than 1080.

The video signal converting unit 230 may include an analog-to-digital converter (ADC). In particular, the video signal converting unit 230 may include an ADC receiving a differential signal to minimize the influence of noise.

The video signal output unit 240 transmits the converted video signal from the video signal conversion unit 230 to an external storage medium or a display unit to store or display data.

The driving motor unit 250 receives the position information of each lens from the zoom lens integrated camera 210 to obtain an optimal image by adjusting the zoom lens and the focus lens angle of the zoom lens integrated camera 210 The angle of the lens is adjusted.

The system control unit 260 applies a reference signal to the video signal converting unit 230 to convert the video signal converted from the video signal converting unit 230 into an image that can be viewed by the administrator's eyes, And receives the position information of each lens and controls the driving motor unit 250.

The system control unit 260 processes the digital signals from the video signal converter 230 to generate digital image signals classified into luminance and chroma signals.

The temperature detector 270 detects the temperature of the main body 110 in real time to drive the heater unit 290 to the lens initialization control unit 280. The lens initialization control unit 280 The temperature information of the temperature detector 270 is analyzed to determine whether the heater unit 290 is in operation.

The heater unit 290 is installed in the main body 110 and drives the zoom lens integrated camera 210 when the zoom lens integrated camera 210 is frozen by receiving a control signal from the lens sharpening control unit 280 .

The function switch unit 300 includes an LED button and is operable at night.

The operation of the police car CCTV system according to the present invention will be described as follows.

That is, FIG. 7 is a flowchart schematically illustrating a lens initialization error recovery method of a police car CCTV system according to the present invention.

As shown in FIG. 7, the lens initialization error recovery method of the police car CCTV system according to the present invention turns on the power of the CCTV system by turning on the vehicle (S110).

Then, the lens of the zoom lens integrated camera 210 is initialized (S120). At this time, the lens is composed of a zoom lens for performing a zoom operation and a focus lens for autofocus, and two kinds of lenses are organically operated during zoom operation to automatically focus on the zoom lens. When the power is applied, the lens initializing operation is performed to grasp the initial positions of the two types of lenses. The lens position is determined based on the reference point by moving the lens through the motor driving unit 250.

Then, it is determined whether the lens of the zoom lens integrated camera 210 is normally initialized (S130).

If the lens initialization of the zoom lens integrated camera 210 is not normally performed, the ambient temperature is detected using the temperature detector 270 (S140).

Next, the temperature information detected by the temperature detector 270 is received, and the lens initialization controller 280 compares the detected temperature information with a reference value to determine whether the lens is in a cryogenic temperature state (S150).

Meanwhile, the initialization of the lens, the detection of the ambient temperature, and the driving of the heater unit are repeatedly performed, so that the zoom lens integrated camera 210 can be normally used through lens initialization more quickly.

At this time, if it is determined that the lens initialization control unit 280 is in a cryogenic temperature state, a control signal for operating the heater unit 290 is output (S160).

On the other hand, if it is determined from the lens initialization control unit 280 that the lens is not in a cryogenic temperature state, an alarm of malfunction is generated (S170). At this time, the alarm of the malfunction is not an error in the state where the zoom lens integrated camera 210 is frozen in a cryogenic temperature state but a malfunction due to other malfunctions, so that the malfunction alarm can be quickly transmitted to the manager so that the malfunction can be repaired.

If the initialization of the camera lens is normally performed, the camera 210 is operated to photograph a surrounding image (S180).

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. . Therefore, the embodiments disclosed in the present invention are not intended to limit the scope of the present invention but to limit the scope of the present invention. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

210: zoom lens integrated camera 220: image sensor unit
230: Video signal conversion unit 240: Video signal output unit
250: motor driving unit 260: system control unit
270: temperature detection unit 280: lens initialization control unit
290: heater section 300: function switch section

Claims (10)

A zoom lens integrated camera configured to capture a light image on one surface of the main body,
An image sensor unit for converting a light-type image incident through the zoom lens integrated camera into an electrical signal;
A video signal converter for converting an image converted into an electric signal through the image sensor unit into a video signal and outputting the converted video signal,
A video signal output unit for externally outputting an image converted into a video signal through the video signal converter;
A motor driver for adjusting an angle of the zoom lens and the focus lens of the zoom lens integrated camera,
A system control unit for receiving the lens position information from the zoom lens integrated camera and controlling the motor driving unit and controlling the video signal converting unit,
A temperature detector for detecting a temperature inside the main body,
A lens initialization control unit for outputting a control signal when the temperature information detected by the temperature detection unit is lower than a reference value to perform lens initialization and outputting a drive signal,
A heater unit for operating the zoom lens integrated camera in response to a drive signal from the lens initialization control unit,
And a function switch unit for operating the system control unit. The video signal output unit according to claim 1, wherein the main body is made of an aluminum material and is mounted on a front surface and a rear surface of the main body and is detachable from the main body, And a chromate agent coated on a surface of the main body and the cover, characterized by comprising: a jack assembly for transmitting image information to the outside of the jack assembly; system. The police car CCTV system according to claim 1, wherein the function switch unit comprises an LED operation button. The connector according to claim 2, wherein the jack assembly comprises: a connecting member connected to the outside; a bracket coupled to the connecting member and connected to the main body; a gasket formed on one surface of the bracket; A shield terminal connected to the video signal output unit through a connection terminal; a cable harness connected to the other surface of the bracket, the cable harness being connected to the connection member; and a ferrite core connected to the cable harness. Police car CCTV system. The police car CCTV system according to claim 1, wherein the zoom lens integrated camera comprises a zoom lens for zooming operation and a focus lens for autofocus, and the zoom lens is equipped with an auto zoom function. The police car CCTV system according to claim 1, wherein the lens initialization control unit analyzes the temperature information of the temperature detection unit to determine whether the heater unit is in operation. The CCTV system of claim 1, wherein the video signal output unit transmits the converted video signal from the video signal converter to an external storage medium or a display unit. 3. The CCTV system for a police car according to claim 2, wherein the chromate agent is applied except for a contact portion between the main body and the cover. Turning on the power of the CCTV system by turning on the vehicle;
Initializing a lens of a zoom lens integrated camera of the CCTV system;
Determining whether the lens of the zoom lens integrated camera has been normally initialized;
If the lens initialization of the zoom lens integrated camera is not normally performed, detecting an ambient temperature using a temperature detector;
Receiving the temperature information detected by the temperature detector, and comparing the detected temperature information with a reference value in the lens initialization control unit to determine whether it is in a cryogenic temperature state;
And outputting a control signal for operating the heater unit when it is determined that the lens initialization control unit is at a cryogenic temperature to defrost the zoom lens integrated camera;
And a step of photographing a peripheral image by operating the zoom lens integrated camera when the zoom lens integrated camera is normally initialized. The method of claim 9, further comprising the step of generating a malfunction alarm when the lens initialization control unit determines that the lens is not at a cryogenic temperature.

Images