KR100711586B1 - An apparatus for washing of the camera observation system and the method thereof - Google Patents

Abstract

A device for securing a field of view of a camera surveillance system and a method thereof, comprising: a wiper apparatus provided on a protective glass to provide a field of view securing apparatus and a method for securing a field of view of a camera unit mounted on a camera surveillance system, and a method thereof; The cleaning liquid ejecting device for ejecting the cleaning liquid onto the protective glass, the memory unit for storing the reference photographing state and the current photographing state previously photographed by the camera unit, the sharpness of the reference photographing state stored in the memory unit and the sharpness of the current photographing state If the photographing state judging section and the photographing state judging section judge that the current state of shooting does not satisfy the conditions of the predetermined clarity, the wiper apparatus or the cleaning liquid ejecting apparatus is compared. It was set as the structure containing the control part to operate.

By such a configuration, the effect that the field of view photographed by the camera unit can be constantly ensured with respect to the road situation can be obtained.

Cleaning liquid, photographing state determining unit, wiper device, washer tank, washing amount checking unit

Description

An apparatus for washing of the camera surveillance system and method thereof

1 is an installation diagram of a general speed vehicle unmanned surveillance system,

2 is a block diagram illustrating a device for securing a view of a camera surveillance system according to the present invention;

3 is a block diagram of a device for securing a view of a camera monitoring system according to the present invention;

4 is a flowchart for explaining an operation of the apparatus for securing a view shown in FIGS. 2 and 3.

[Description of the code]

20: camera portion, 30: memory portion

40: A / D converter, 50: microprocessor unit

60: wiper device 70: washer tank

80: washing amount confirmation unit 100: notification unit

110: module 120: cleaning liquid jet device

The present invention relates to a device for securing a field of view of a camera surveillance system and a method thereof, and more particularly, to a field of view for securing a field of view of a surveillance region of a photographing apparatus equipped with a camera surveillance system used for monitoring and controlling traffic conditions on a road. And to a method thereof.

Recently, with the development of production activities and the increase of leisure life, the area of activity of individuals and businesses has increased, and the operation of automobiles has increased due to the demand for rapid movement, and thus the conditions of the existing roads are four or six lanes. Increasingly, new highways are being added.

In this way, in order to maintain a smooth traffic flow in accordance with the expansion of national highways and the expansion of highways, the current traffic situation is notified through a signboard between traffic broadcasts and certain sections. In order to prevent accidents, economic and speed limit speeds are designated.

In other words, road hazard signs and patrol cars are placed in dangerous areas to control speeding vehicles on national roads and highways, and unmanned monitoring devices are installed to monitor accidents. As such an unmanned monitoring device, a closed circuit camera or a recording tape photographed for a predetermined period of time is read to prevent overspeed and maintain a driving order of a vehicle.

1 shows an installation diagram of an unmanned surveillance system for controlling speeding vehicles on a highway as described above.

As illustrated in FIG. 1, the monitoring system includes a pole 1 provided at a predetermined interval or on an accident-prone area on a highway, measures the speed of a vehicle traveling on a road, and records and records a speeding vehicle. The part 2 is attached to the pole base 1 and is operated.

In addition, the camera unit 2 is a camera 21 for photographing speeding vehicles, a transparent protective glass 22 for preventing contamination of the lens of the camera 21, and a protective box 23 incorporating the camera 21. It is composed.

In addition, in the protective box 23, a power supply unit for supplying the necessary power to the camera unit 2, a transmission unit for transmitting data photographed by the camera 21 to a remote management system by wire or wirelessly, the camera 21 A driving unit for moving the camera unit 2 up, down, left and right, and a receiving unit for receiving a control signal from the management system to designate a shooting range of the control unit.

Such an unmanned speeding vehicle unmanned surveillance system is disclosed in Korean Patent Laid-Open Publication No. 1997-0068609 and Korean Utility Model Registration No. 20-0215331.

That is, in the above-mentioned patent publication, an electronic display device having a distance of about 150 to 160m is installed in a speed sensing microwave sensor installed at a constant height of the pole pole 1, and a sensor for camera operation detected at about 10m in front of the electronic display device. LED display for displaying advertisement and driving speed at about 2.5 ~ 5sec display distance, high speed camera 21 for automatically photographing the violating vehicle number within about 5 ~ 15m accurately and stably. Frame grabber is provided via a digital converter or buffer, which grabs the image using the high speed camera 21 and stores it in an SRAM, which is then controlled by the control unit in the SRAM of the integrated circuit. Through quantification and cosine transform of image information It is disclosed for speeding car unattended monitoring system storing in memory.

In addition, in the registered utility model publication, it is installed at a predetermined height of the pole pole 1 on the road, operated by wire and wireless, and capable of 360-degree rotation so that the camera 21 for monitoring the surroundings is installed at a predetermined place. A plurality of external signal sensors for detecting various information of the installed position, the camera 21 automatically moves quickly when the sensor is operating to track and record the current status of the location receiving the external sensor signal on the recording medium and at the same time The present invention discloses a traffic black box including a controller for controlling the display to be displayed on an electronic board, and a modem for transmitting an abnormal state to a traffic situation room where a sensor operates.

However, in the technique disclosed in the above publication, in the unmanned surveillance system, data captured by the camera 21 is compressed and transmitted online to quickly retrieve and process the vehicle track of the speeding vehicle, or rotate the camera 21 by 360 °. It is only disclosed about the technique which can take a picture quickly, and does not disclose about the imaging state of the camera 21 at all.

In the general unmanned surveillance system of a speeding vehicle, the camera unit 2 is mounted at a certain height in the center portion of the highway lane and has a problem that its maintenance is not easy when the lens of the camera 21 is contaminated.

In other words, the camera mounted on such a surveillance system is mounted at a certain height in the center of a road to monitor a high-speed driving vehicle, so that foreign matters such as dust or smoke caused by the vehicle's movement, rain, rain, snow, etc. The contamination by the back becomes severe. In addition, in order to wash it, the manager has to wash the car by using an expensive ladder vehicle, so that maintenance costs for maintenance are increased, and there is also a problem that obstructs the flow of traffic on the road.

SUMMARY OF THE INVENTION An object of the present invention is to solve the problems of the prior art as described above, and to provide a field of view securing apparatus and a method for securing a field of view of a camera unit mounted on a camera surveillance system.

Another object of the present invention is to secure a field of view that can remotely monitor the foreign substances such as dust on the front of the camera, pollutants such as smoke, raindrops, snow, etc. in the remote control system equipped with a camera, such as a camera surveillance system and to clean them To provide a way.

In order to achieve the above object, the field of view securing apparatus according to the present invention is provided to protect the camera lens for photographing the situation of the subject, the photographing lens of the camera in order to monitor and control the situation of the subject and the front of the protective glass An apparatus for securing a field of view of a camera monitoring system having a protective box formed and a transmitting means for transmitting a situation of a subject photographed by the camera unit to an external management system, the wiper device provided on the protective glass and a cleaning liquid on the protective glass. A cleaning liquid ejecting device that ejects, a memory unit for storing the current photographing state and the reference photographing state previously photographed by the camera unit, and comparing the clarity of the reference photographing state stored in the memory unit with the clarity of the present photographing state Image determination unit and image for determining whether or not the sharpness condition of the And a control unit for operating the wiper device or the cleaning liquid ejecting device when it is determined by the photographing state determining unit that the current rubbing state does not satisfy a predetermined sharpness condition.

In the field of view securing apparatus, the reference photographing state includes a first state in which normal weather and the protective glass are not contaminated at all, a second state contaminated to be able to recognize an image captured by the camera unit, and And a third state of rain or snow on the protective glass by rainfall or snowfall.

In the field of view securing apparatus, the controller operates only the wiper apparatus when the sharpness of the current photographing state does not satisfy the range of the sharpness of the first state and the third state.

In the visual field securing apparatus, the controller controls the cleaning liquid ejecting apparatus after the cleaning liquid ejecting apparatus is operated when the sharpness of the current photographing state does not satisfy the range of the sharpness of the first state and the second state. Start the wiper device.

In the field of view securing apparatus, the cleaning liquid ejecting apparatus includes a washer tank for storing the cleaning liquid, a driving pump for supplying the cleaning liquid to the supply pipe, an injection nozzle for injecting the cleaning liquid supplied to the supply pipe, and a storage amount of the cleaning liquid in the washer tank. It includes a washing amount checking unit for confirming.                         

In the visual field securing apparatus, when the cleaning liquid stored in the washer tank is confirmed by the cleaning amount confirmation unit to be less than or equal to a predetermined storage amount, a notification unit for notifying the management system of a signal requesting replenishment of the cleaning liquid. Include.

In the field securing apparatus, the wiper of the wiper device and the spray nozzle of the cleaning liquid jetting device are provided on the protective glass.

In the field of view securing apparatus, the cleaning liquid ejecting apparatus further includes a heating mechanism for preventing freezing of the cleaning liquid in the washer tank, wherein the heating mechanism is determined to be greater than or equal to a predetermined storage amount by the cleaning amount confirming unit. And is operated when the cleaning liquid is not injected from the spray nozzle.

In the visual field securing apparatus, the memory unit, the photographing state determination unit, and the control unit are realized by one microprocessor unit.

In addition, in order to achieve the above object, the method of securing a field of view according to the present invention is a camera unit for photographing the situation of the subject, a protective box having a protective glass for protecting the camera unit, the situation of the subject to an external management system A method of securing a field of view of a camera monitoring system having a transmitting means, the method comprising: providing a reference photographing state previously photographed by the camera unit and a current photographing state, and storing sharpness information of the state in a memory unit; Comparing the clarity of the reference photographing state stored in the storing step with the clarity of the current photographing state; when the clarity of the current photographing state does not satisfy a predetermined condition in the comparing step, washing the protective glass Characterized in that it comprises a step.                         

In addition, in the method of securing a view, the washing may include a first washing step of washing only a wiper device provided on the protective glass, and a second washing step using a wiper device and a cleaning liquid spraying device provided on the protective glass. It consists of a washing step.

In the method of securing a view, the reference photographing state includes a first state in which normal weather and the protective glass are not contaminated at all, a second state contaminated to be able to recognize an image photographed by the camera unit, and And a third state of rain or snow on the protective glass by rainfall or snowfall.

Further, in the visual field securing method, when the sharpness of the current photographing state does not satisfy the range of the sharpness of the first state and the third state, only the first washing step is executed.

In the visual field securing method, when the sharpness of the current photographing state does not satisfy the range of the sharpness of the first state and the second state, the second washing step is executed.

The method may further include: checking the amount of the cleaning liquid required by the washing step and notifying the external management system of the state identified in the checking step.

Best Mode for Carrying Out the Invention Embodiments of the present invention will be described below with reference to the drawings.

In addition, the same code | symbol is attached | subjected about the same part and the repeated description is abbreviate | omitted.

2 is a block diagram illustrating an apparatus for securing a view of a camera monitoring system according to the present invention.

In FIG. 2, reference numeral 30 denotes a memory unit for storing a state photographed by the camera unit 20, and 31 denotes a normal weather condition and the protective glass 22, which is a transparent member of the camera unit 20, is completely absent. In the uncontaminated state, an image of the entire surveillance zone of the camera 21 is photographed and converted into first reference image data by the A / D converter 40 and stored therein, and reference numeral 32 denotes a camera ( 21) the A / D conversion unit 40 as the second reference image data to the extent that the image captured in the 21) can be recognized and the image of the entire surveillance zone of the camera 21 can be captured and recognized in a contaminated state. The second recording area is converted and stored, 33 is a rain or snow on the protective glass 22 of the camera 21 in the rain or snow, the image of the entire surveillance zone of the camera 21 is taken A A third recording image which is converted and stored into third reference image data by the / D converter 40 Reference numeral 34 denotes a fourth recording area in which data of the current photographing state captured by the camera 21 in which the camera surveillance system is installed and operated is converted into a digital value by the A / D conversion unit 40 is stored. .

The memory unit 30 may be composed of one semiconductor memory such as a ROM, a RAM, a PROM, or the like, and the first recording area 31 to the third recording area 33 use a read only memory such as a ROM or a PROM. The fourth recording area 34 may use a random memory that can be updated as needed, such as RAM or SRAM.

In Fig. 2, reference numeral 50 denotes a microprocessor unit, which includes a control unit 51 and a photographing state determination unit 52.

The photographing state determining unit 52 controls the sharpness and the second reference image data of the first reference image data stored in the first recording area 31 and the second recording area 32 in the memory unit 30 through the control unit 51. The sharpness of the first recording area 31 and the third recording area 33 in the memory unit 30 through the control unit 51. The sharpness of the first reference image data stored in the second reference image data and the sharpness of the third reference image data are compared with the sharpness of the current photographing state stored in the fourth recording area 34.

The processing of the sharpness of the reference image data compared by the shooting state determination unit 52 and the sharpness of the current shooting state is output to the controller 51.

In addition, in Fig. 2, reference numeral 60 denotes a wiper device which is a main component of the apparatus for securing view according to the present invention, 70 denotes a washer tank 70 for storing cleaning liquid, and 80 denotes a washer tank. A washing amount checking unit 80 for checking the storage amount of the washing liquid. The structure of this wiper apparatus 60, the washer tank 70, and the washing | cleaning amount confirmation part 80 is demonstrated concretely according to FIG.

In FIG. 2, reference numeral 90 denotes a management system for monitoring and managing the camera monitoring system according to the present invention at a remote location while wired or wirelessly monitoring, and reference numeral 100 denotes a washer tank by the washing amount checking unit 80. When the cleaning liquid stored in 70 is confirmed to be less than or equal to the predetermined storage amount, an alarm function is provided as a notification unit for notifying the management system 90 of replenishment of the cleaning liquid.

Next, the organic coupling relationship of each component shown in FIG. 2 will be described.

In the camera monitoring system according to the present invention, before the system is mounted and operated, first, the camera unit 20 photographs the normal weather and the protection glass 22 is not contaminated and sets the first reference image data. To the first recording area 31, the protective glass 22 is slightly contaminated, but the recognizable state is set as the second reference image data to be stored in the second recording area 32, and to the protective glass 22. The rain or snowy state is set as the third reference image data and stored in the third recording area 33.

Subsequently, an image captured by the camera unit 20 in the operating state of the camera surveillance system is converted into a digital value through the A / D converter 40, and this value is controlled by the controller 51 in the fourth recording area. Temporarily stored in 34.

When the current state is captured, the controller 51 outputs a control signal for comparison by the shooting state determiner 52 according to the sharpness of the image recorded in the first recording area 31 to the fourth recording area 34. The photographing state determination unit 52 compares the sharpness of the image stored in the first recording area 31 to the third recording area 33 with the sharpness of the image stored in the fourth recording area 34 according to the control signal. Then, it is determined whether the predetermined condition set in the photographing state determination unit 52 is satisfied.

According to the determination result of the photographing state determination unit 52, the control unit 51 determines whether to drive the wiper device 60 and whether or not to drive the cleaning liquid ejecting device.

In addition, when the washing liquid stored in the washer tank 70 is confirmed to be less than or equal to the predetermined storage amount, the washing amount checking unit 80 outputs this confirmation signal to the control unit 51, and the control unit 51 supplies the notification unit 100. In response, the management system 90 transmits a cleaning liquid replenishment request signal.

Next, in the field of view securing apparatus according to the present invention, the configuration of the wiper device and the cleaning liquid ejecting device will be described with reference to FIG. 3.

In FIG. 3, reference numeral 110 denotes a module including a memory unit 30, a microprocessor unit 50, a wiper device 60, and a notification unit 100 shown in FIG. 2, and 120 denotes a cleaning liquid jet. Device.

In the structure shown in FIG. 3, the module 110 is illustrated as being mounted on the upper portion of the protective box 23 for convenience of description, but it is preferable to mount the module 110 inside the protective box 23.

In the wiper device 60, a wiper link that performs a link motion according to the driving of the wiper motor, the wiper motor, and a pivot formed at a predetermined interval with the wiper link are embedded in the module 110, and are caused by contaminants from outside. Prevent corrosion.

In addition, as shown in Figure 3, 61 is installed to be fixed to the front end of the pivot built in the module 110, the rotational movement at a predetermined angle in the protective glass 22 provided on the front of the protective box 23 The wiper arm is a wiper blade, and 62 is a wiper blade detachably coupled to the tip of the wiper arm 61 and repeatedly angularly moving on the surface of the protective glass 22.

In addition, the cleaning liquid ejecting device 120 for ejecting the cleaning liquid 71 onto the protective glass 22 is to connect the washer tank 70, the cleaning liquid ejecting device 120, and the module 110 to store the cleaning liquid 71. In the spray nozzle 73 and the washer tank 70 provided in the upper portion of the protective glass 22 to inject the cleaning liquid supply pipe 72 and the cleaning liquid 71 supplied through the supply pipe 72 onto the protective glass 22. A driving pump 74 for supplying the cleaning liquid 71 to the supply pipe 72 is provided.

On both sides of the drive pump 74 are provided with connectors 75 and 76, respectively. That is, the supply pipe 72 is inserted into the connector 75 on one side of the drive pump 74, and the connector 76 on the other side of the drive pump 74 is a washer tank 70 as shown in FIG. 3. It is configured to face the bottom surface of the washer tank (70) to receive the cleaning liquid (71).

In addition, in FIG. 3, the washing | cleaning liquid spraying apparatus 120 is provided with the injection hole 77 provided in the upper part of the washer tank 70, and the washer tank 70 in winter in order to supply the washing | cleaning liquid 71 to the washer tank 70. In addition, in FIG. The lower limit of the cleaning solution 71 stored in the washer tank 70, that is, the connector 76, of the heating device 78 for preventing the freezing of the cleaning solution, the power supply line 79 for supplying power to the heating device 78. The lower limit detection sensor 81 which detects the range in which the cleaning liquid 71 is not supplied to the intake hole, and the upper limit detection sensor 82 which detects the upper limit of the cleaning liquid 71 injected into the washer tank 70 are provided.

3 and the signal output lines of the lower limit sensor 81 and the upper limit sensor 82 shown in FIG. 3 drive and control the camera unit 20 and the module 110, respectively. Connected by a power supply line and a signal line.

In addition, in the heat generating mechanism 78 according to the present invention, the cleaning liquid 71 in the washer tank 70 is judged to be an abnormality of the amount detected by the lower limit sensor 81 in the determination by the washing amount checking unit 80, The control unit 51 is controlled to operate when the cleaning liquid 71 is not injected in the injection nozzle 73. In addition, the heat generating mechanism 78 provides a temperature measuring means for measuring the temperature in the washer tank 70 separately from the control unit 51, and when it is determined that the cleaning liquid 71 is frozen by the temperature measuring means, It may be configured to work.

Next, operation of the field of view securing apparatus of the camera monitoring system according to the present invention will be described with reference to FIG. 4.

FIG. 4 is a flowchart for explaining an operation of the apparatus for securing a view shown in FIGS. 2 and 3.

Externally manages the situation of the subject photographed by the camera unit 20 for photographing the situation of the subject, the protective box 23 provided to protect the photographing lens of the camera unit, and the front surface thereof is made of protective glass, and the camera unit 20. In the apparatus for securing the field of view of a camera surveillance system having a transmission means for transmitting to the system (90), before the system is mounted and operated, it is normal weather through the camera unit (20) and the protective glass (22) is not contaminated at all. The unrecorded state is photographed and set as the first reference image data and stored in the first recording area 31 of the memory unit 30 as an image A (step S10).

Next, although the protective glass, which is a transparent member provided on the front surface of the protective box 23, is slightly contaminated, the second recording area of the memory unit 30 is set by setting the second reference image data as the state in which the captured image is recognizable. 32 is stored as an image B (step S20).

Then, the image (C) in the third recording area 33 is set as the third reference image data by setting the image photographed in the rain or snow on the protective glass 22 during rain or snow at the place installed in this system. (Step S30).

Subsequently, an image captured by the camera unit 20 while the camera surveillance system is mounted and operating is converted into a digital value through the A / D converter 40, and this value is converted into a fourth value through the controller 51. The recording area 34 is temporarily stored as an image D (step S40).

Next, the photographing state determining unit 52 extracts only the range of the image of the image data of the image D from the image A, and the range of the image of the image data of the image D from the image B. The sharpness of the image D stored in the fourth recording area 34 by extracting only the sharpness of the image A stored in the first recording area 31 and the sharpness of the image B stored in the second recording area 32. It is determined whether or not the range is within (step S50).

At the same time, the control unit 51 determines the storage amount of the washing liquid 71 in the washer tank 70 through the washing amount checking unit 80, and outputs from the lower limit sensor 81 on the storage state of the washing liquid 71. If there is, the management system 90 is notified of the lack of the cleaning liquid 71 via the notification unit 100.

In addition, the control part 51 can supply the washing | cleaning liquid 71 from the washer tank 70, and if the sharpness of the image D is out of the range of the image A and the image B, the washing | cleaning liquid spraying apparatus 120 A command for ejecting the cleaning liquid 71 is output. The cleaning liquid ejecting device 120 operates the drive pump 74 according to the command signal from the control unit 51, and the cleaning liquid is ejected from the injection nozzle 73 (step S60).

At the same time, the controller 51 drives the wiper device 60 to repeatedly wipe the wiper blade 62 to clean the protective glass 22 (step S80).

The operation of the wiper blade 62 in step S80 is executed 2-3 times, and the process returns to step S50.

If the sharpness of the image D is within the sharpness ranges of the image A and the image B in step S50, the flow advances to step S70.

In step S70, only the range of the image of the image data of the image D from the image C is extracted and the sharpness of the image D stored in the fourth recording area 34 is stored in the first recording area 31. It is determined whether the sharpness of A) and the sharpness of the image C stored in the third recording area 33 are within the range.

If the sharpness of the image D is within the sharpness of the image A and the image C in step S70, the process returns to step S50, and the sharpness of the image D ranges from the sharpness of the image A and the image C. If outside, the process proceeds to step S80 to drive only the wiper device 60.

That is, when there is rainfall or snowfall in the place where the system is installed, only the wiper device 60 is operated without operating the cleaning liquid jetting device 120 to wash rain water or snow that is attached to the protective glass 22.

As mentioned above, this invention is not limited to the said Example.

That is, in the above embodiment, the memory unit 30 has been described in a configuration in which the microprocessor unit 50 is separately provided. However, the present invention is not limited thereto, and the memory unit 30 and the microprocessor unit 50 may include one microprocessor. It is also possible to use a structure integrated by a unit.

In addition, the above embodiment has been described using a camera monitoring system for traffic control as an example, but the present invention is not limited thereto, and may be applied to any system for monitoring a subject with a camera.

As described above, according to the apparatus for securing the field of view of the camera monitoring system and the method according to the present invention, the effect that the field of view taken by the camera unit can always be ensured with respect to the situation of the subject is obtained.

In addition, according to the present invention, not only can the maintenance cost of the camera monitoring system installed in advance be reduced, but also the traffic situation can be clearly understood when applied to the traffic control system, so that the flow of the vehicle can be smoothly obtained.

In addition, according to the present invention, since the replenishment of the cleaning liquid is remotely monitored, the cleaning liquid can be quickly replenished, and the freezing of the cleaning liquid can be prevented in winter.

Moreover, according to this invention, since there is no use of a cleaning agent when there is rainfall or snowfall, the effect which can save cleaning agent is also acquired.

Claims (15)

Camera unit for photographing the situation of the subject in order to monitor and control the situation of the subject, a protective box provided to protect the photographing lens of the camera unit and its front surface is made of protective glass, the situation of the subject photographed in the camera unit A field of view securing apparatus of a camera monitoring system having a transmitting means for transmitting to an external management system, A wiper device provided on the protective glass; A cleaning liquid ejecting device for ejecting the cleaning liquid onto the protective glass; The first weather in which the camera is pre-captured by the camera unit and the first state in which the protective glass is not contaminated at all, the second state in which the protective glass is contaminated to recognize the photographed image, and the rain or snow A memory unit for storing a current photographing state and a reference photographing state including a third state of rain or snow on the protective glass; Whether the sharpness of the current photographing state stored in the memory unit satisfies the range of the sharpness of the first state and the second state, and the range of the sharpness of the first state and the third state A photographing state judging section which determines whether or not to make a picture; If the photographing state determining unit determines that the sharpness of the current photographing state does not satisfy the range of the sharpness of the first state and the second state, the wiper device is operated after the cleaning liquid ejecting device is operated. And a control unit for operating only the wiper device when it is determined that the sharpness of the current photographing state does not satisfy the range of the sharpness of the first state and the third state. Field of view. delete delete delete The method of claim 1, The cleaning liquid ejecting device includes a washer tank for storing the cleaning liquid, a driving pump for supplying the cleaning liquid to the supply pipe, an injection nozzle for injecting the cleaning liquid supplied to the supply pipe, and a cleaning amount checking unit for confirming a storage amount of the cleaning liquid in the washer tank. A view securing device, characterized in that. The method of claim 5, And a notification unit for notifying the management system of a signal for requesting replenishment of the cleaning liquid when the cleaning liquid stored in the washer tank is confirmed to be less than or equal to a predetermined storage amount by the cleaning amount confirmation unit. . The method of claim 5, The wiper of the wiper device and the spray nozzle of the cleaning liquid ejecting device are provided on the upper portion of the protective glass. The method of claim 5, The cleaning liquid ejecting device further includes a heating mechanism for preventing freezing of the cleaning liquid in the washer tank, And the heating mechanism is operated when the cleaning amount is determined to be greater than or equal to a predetermined storage amount and the cleaning liquid is not injected from the spray nozzle. The method of claim 1, And the memory unit, the photographing state determination unit, and the control unit are realized by one microprocessor unit. A method of securing a field of view of a camera monitoring system having a camera unit for photographing a situation of a subject, a protective box having a protective glass for protecting the camera unit, and a transmission unit for transmitting the situation of the subject to an external management system, The first weather in which the camera is pre-captured by the camera unit and the first state in which the protective glass is not contaminated at all, the second state in which the protective glass is contaminated to recognize the photographed image, and the rain or snow Providing a reference photographing state including a third state of rain or snow on the protection glass and a present photographing state, and storing the sharpness information of each state in a memory unit; Comparing the sharpness of the reference shooting state stored in the storing step with the sharpness of the current shooting state, In the comparing step, when it is determined that the sharpness of the current photographing state does not satisfy the range of the sharpness of the first state and the second state, the wiping device is operated after the cleaning liquid ejecting device is operated. A second washing step of operating only the wiper device when it is determined that the first washing step and the sharpness of the current photographing state do not satisfy the ranges of the sharpness of the first state and the third state. Field of view secured, characterized in that it comprises a. delete delete delete delete The method of claim 10, Confirming the amount of cleaning solution required by the first washing step; And notifying the external management system of the state identified in the checking step.

Images