JP2014207548A - Monitor camera capable of imaging dead angle zone, and control method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a monitor camera capable of imaging a dead angle zone, and a control method therefor.SOLUTION: The monitor camera includes: a main body with a wide-view camera and a tele-view camera capable of imaging ahead; and a sub-body 200 having a protruding overall view camera on one side of the main body in a state freely rotatable to all directions and being capable of freely changing an imaging region. A video image imaged by the overall view camera is transmitted to a multiplexer (MUX) of the main body. A central processing unit (CPU) of the main body controls the multiplexer to selectively output a video signal imaged by each camera by a picture in picture (PIP) method.

Description

The present invention relates to a surveillance camera and a control method therefor, and more specifically, a wide-view camera capable of photographing the front and a main body with a teleview camera, The present invention relates to a surveillance camera capable of photographing a blind spot area, and a control method therefor, including a sub-body that has a projecting whole view camera projecting on the side and can freely change an imaging region.

The present invention also relates to a surveillance camera capable of photographing a blind spot area that receives a video signal photographed by a separate external camera and collectively processes it with a multiplexer (MUX), and a control method thereof.

In general, surveillance cameras have the disadvantage that the presence or absence of magnified shooting of a subject is determined by the lens specifications (or lens angle of view), and when a magnified image is taken out by a digital method, the picture quality deteriorates if the pixels on the screen are enlarged. . When a mega-class camera or mega-class video recorder (DVR) having one million pixels or more is used in order to completely eliminate such a drawback, the product cost of the entire system increases.

A conventional surveillance camera has a problem that it is difficult to accurately identify a moving object because it has a single camera and shoots the entire specified area and displays it on the monitor. Could not identify lower case letters such as number plates.

In addition, since the surveillance area of the conventional surveillance camera is specified, there is a blind spot area that cannot be photographed, which causes a problem that the surveillance function is significantly lowered. In order to prevent this, it is conceivable to provide a large number of surveillance cameras in a limited space, but there is a problem that the cost is high and the spatial arrangement of surrounding facilities is disturbed.
Korean Published Patent No. 10-2010-0030458A

The present invention is for solving the above-mentioned problems, and its purpose is to provide a main body with a wide-view camera and a teleview camera capable of photographing the front, and the main body in a state of being freely rotatable in the front-rear and right-left And a control method for the surveillance camera capable of photographing a blind spot area, which includes a sub-body that has a projecting whole-view camera projecting on one side thereof and can freely change an imaging region.

Another object of the present invention is to provide a surveillance camera capable of photographing a blind spot area that receives a video signal photographed by a separate external camera and collectively processes it with a multiplexer (MUX), and a control method therefor. By the way.

  The surveillance camera capable of photographing the blind spot according to the present invention is a surveillance camera including a wide-view camera that photographs the entire front on the main body and a teleview camera that optically zooms in and photographs only the preselected region. A sub-body with an overall view camera is attached to one side of the main body so that a blind spot zone can be photographed and rotated in the front-rear and left-right directions, and an image photographed by the overall view camera is a main body multiplexer (MUX). In the central processing unit (CPU) of the main body, the video signal captured by each camera is selectively output by the picture-in-picture (PIP) system by controlling the multiplexer (MUX). It is characterized by that.

According to the surveillance camera and the control method thereof according to the present invention, the surveillance camera is provided with a main body with a wide-view camera and a teleview camera for photographing the front, and a sub-body with an entire view camera for photographing the blind spot zone. In addition, by attaching the sub-body to one side of the main body in a rotatable state, there is an effect that omnidirectional imaging of the region to be monitored becomes possible.

In addition, since video signals captured by a separate external camera can be received and processed in a batch by a multiplexer (MUX), the installation cost of a large number of cameras can be greatly reduced and any area desired by the user can be reduced. Since it is possible to shoot freely, there is an effect that the blind spot zone of surveillance can be eliminated in a source manner.

FIG. 1 is a front view schematically showing a surveillance camera capable of photographing a blind spot according to the present invention. FIG. 2 is a right side view of FIG. FIG. 3 is a perspective view schematically showing the internal configuration of the main body according to the present invention. FIG. 4 is a schematic diagram schematically showing a connection method for partial enlargement and signal input / output of the key adjustment panel shown in FIG. FIG. 5 is a block diagram of a control panel according to the present invention. FIG. 6 is a block diagram of the key adjustment panel according to the present invention. FIG. 7 is a flowchart schematically showing a monitoring camera control method capable of photographing a blind spot according to the present invention. FIG. 8 is a schematic diagram schematically illustrating various embodiments in which video captured by a camera is displayed on a monitor. FIG. 9 is a schematic diagram schematically illustrating various embodiments in which video captured by a camera is displayed on a monitor. FIG. 10 is a schematic diagram schematically illustrating various embodiments in which an image captured by a camera is displayed on a monitor. FIG. 11 is a schematic diagram schematically illustrating various embodiments in which video captured by a camera is displayed on a monitor. FIG. 12 is a schematic diagram schematically illustrating various embodiments in which video captured by a camera is displayed on a monitor. FIG. 13 is a schematic diagram schematically illustrating various embodiments in which images captured by an external camera are merged and displayed on a monitor. FIG. 14 is a schematic diagram schematically illustrating various embodiments in which images captured by an external camera are merged and displayed on a monitor.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIGS. 1 and 2, the surveillance camera of the present invention includes a main body 100 that captures the front and a sub-body 200 that has a rotation axis and can freely change the imaging region. There is a special feature.

First, the main body 100 has a front cover 11 and a back cover 12 attached to the front and back of the body 10, and a plurality of first infrared light emitting diodes (IR-LEDs) are mounted on the front of the body 10 of the surveillance camera. ) 21, an illuminance sensor 22 that senses ambient illuminance, a remote control receiver 23 that receives an external wireless signal, a wide-view camera 31 and a teleview camera 32 that photograph the front.

The illuminance sensor 22 transmits a predetermined electrical signal to a central processing unit (CPU), which will be described later, when the surrounding illuminance is low, and causes the first and second infrared light emitting diodes (IR-LEDs) 21 and 81 to be transmitted. At the same time, the remote control receiver 23 transmits a control signal transmitted from the administrator via the remote controller to the central processing unit (CPU), thereby enabling the surveillance camera of the present invention to be remotely controlled.

According to an embodiment of the present invention, a sub-body 200 is attached to the lower side of the main body 100, and an overall view camera 80 is provided on the front surface of the sub-body 200, with the overall view camera 80 as a center. A plurality of second infrared light emitting diodes (IR-LEDs) 81 are formed radially.

As shown in FIG. 2, the sub-body 200 is attached to the body 10 of the main body 100 so as to be rotatable in the front-rear and left-right directions. Here, a structure that is rotated left and right by the first rotation shaft 210 and rotated up and down by the second rotation shaft 211 is shown as an embodiment, but the present invention is not limited to this. It goes without saying that various rotating structures such as a dome structure rotating by a bearing can be adopted.

At this time, video signals photographed by the main body 100 and the sub-body 200 are output to the outside through a video cable 14 penetrating through a through hole 13 formed in the side surface of the body 20 of the surveillance camera. It is preferable that a normal video signal in which RGB is mixed or a VGA signal in which RGB is separated can be selectively used.

On the other hand, as shown in FIG. 3, the main body 100 includes a front panel 20 in which respective electronic components are mounted inside the body 10 and a camera panel 30 that converts images taken by a plurality of cameras into video signals. A power panel 40 for supplying power to each electronic component, a control panel 50 with a central processing unit (CPU) and a multiplexer (MUX), a key adjustment panel 60 having a number of function switches for changing adjustment values, Each component is connected to the back cover 12 by a support shaft 71.

At this time, each of the components is spaced at a predetermined interval for the mounted electronic component or cable, so that the front panel 20 and the back cover are improved in order to improve overall coupling stability. An intermediate support base 70 having a plurality of through holes (not shown) formed in the side surface is interposed between the intermediate support base 70 and the base plate 12.

Therefore, the plurality of support shafts 71 inserted through the through holes of the intermediate support base 70 firmly support the front panel 20, the camera panel 30, the power panel 40, and the control panel 50 to the back cover 12. .

Of course, in addition to the support shaft 71, an auxiliary support shaft (not shown) may be provided between adjacent panels.

Further, as shown in FIG. 4, a through hole (not shown) is formed in the center of the back cover 12 to expose a plurality of adjustment devices provided on the key adjustment panel 60.

According to an embodiment of the present invention, the key adjustment panel 60 includes a function switch 61 for adjusting the brightness of a light emitting diode (LED) for adjusting the brightness of the screen of the surveillance camera, and adjusting the volume of the diaphragm. An adjustment knob (DC iris) 62 that moves, a moving stick 64 that moves the image captured by the camera forward and backward, left and right, and an enlargement switch 65 that expands the captured image are provided.

In addition, an external input port 63 that receives an external video signal and transmits it to the multiplexer (MUX) 52, and a sensor input port 66 that receives an external sensor signal described later and transmits it to the central processing unit (CPU) 51. In addition, an output port 67 that outputs video signals photographed by the main body 100 and the sub body 200 to a test monitor described later may be provided.

On the other hand, on the control panel 40, as shown in the block configuration diagram of FIG. 5, the first and second infrared light emitting diodes (IR-LEDs) 21 and 81 are turned on based on the signal of the illuminance sensor 22 to A central processing unit (CPU) 51 that controls the lexer (MUX) 52 to generate a control signal so as to selectively output images captured by the plurality of cameras 31, 32, 80, and the cameras 31, 32, 80 And a multiplexer (MUX) 52 that receives a plurality of video signals from the central processing unit (CPU) 51 and outputs a plurality of video signals based on a control signal of a central processing unit (CPU) 51.

The central processing unit (CPU) 51 stores video captured by a plurality of cameras in a digital video recorder (DVR) 90 or selectively displays it on a monitor 91.

At this time, the monitor 91 may divide a single screen and display a plurality of videos simultaneously or in a picture-in-picture (PIP) system, and the screen displayed on the monitor is switched under the control of the administrator. However, the order in which the plurality of videos are switched and the position at which they are overlapped (overlap) during picture-in-picture (PIP) operation can be adjusted according to the use environment and purpose of use at the time of program coding.

The multiplexer (MUX) 52 is a multiplexing device for digital communication, and selects one of the plurality of input signals according to a selection control signal and places it on an output circuit, or a picture-in-picture (PIP) function. In the present invention, a product in which a picture-in-picture (PIP) function and a motion sensor function are realized in addition to a conventional normal multiplexer (MUX) function is used.

At this time, since the multiplexor (MUX) 52 basically includes four channels, in the present invention, in addition to the cameras 31, 32, and 80 that are basically attached, the video signal of a separate external camera 92 is received. Components for receiving and transmitting to the multiplexer (MUX) 52 are also provided.

Of course, a multiplexer (MUX) composed of 4 or more channels (16 channels or the like) may be used according to the use environment and the purpose of use.

For example, when a large number of vehicles enter the imaging area at the same time, the imaging area is divided into four (or more) and the camera corresponding to each area is selectively operated to enlarge an image of a desired part of the vehicle. Can be taken. The video shot by the plurality of cameras is divided into a wide view (basic video) and a teleview (enlarged video), and either one of these videos is displayed on the monitor 91 screen, or The picture is displayed as a screen divided by a picture-in-picture (PIP) function installed in the multiplexer (MUX) 52.

In addition, for the important shooting area, the position of the whole view camera 80 was arbitrarily adjusted, or it was shot with a separate external camera (a zoom camera, a telephoto camera, a wide-angle camera, etc. are all applied). The video is received via the external input port and displayed on the monitor 91.

At this time, the video signal output from the multiplexer (MUX) 52 can be immediately confirmed by the test monitor 94 right next to the monitoring camera via an output port described later. It is possible to easily adjust the installation position and gaze direction of the surveillance camera while watching.

As described above, the present invention includes two cameras 31 and 32 fixed to the body, an overall view camera 80 that is rotatably provided outside the body, and an external camera 92 that is provided separately and operates. The technical feature is that the video captured in step (2) is simultaneously input to the multiplexer (MUX) 52 and the video captured by various methods is displayed on the monitor 91 in a multiplexed manner.

The picture-in-picture (PIP) function means that when displaying a video on a display device such as a television or a monitor, a window function is realized to divide the video of different programs vertically and horizontally, or the upper side of a large screen This is a technique known in the electronic field, and will not be described in detail below. Of course, the present invention may be configured by connecting a separate picture-in-picture (PIP) chip to a normal multiplexer (MUX) via a circuit board.

The motion sensor function refers to determining whether or not there is a moving object in the video imaged by the camera. In the multiplexor (MUX) 52, when motion is detected, this is centrally processed. It transmits to the apparatus (CPU) 51. Of course, the present invention may be configured by connecting a separate motion chip to a normal multiplexer (MUX) via a circuit board.

In addition, when any one or more of the wide view camera 31, the teleview camera 32, and the entire view camera 80 according to the present invention is configured from a variable focus lens having a variable focal length, a clearer monitoring image can be obtained.

For this reason, the central processing unit (CPU) 51 captures the front with the wide view camera 31 and the teleview camera 32, and the whole view camera 80 that is rotatably attached to the outside in a specific direction desired by the administrator. The photographed video signal is displayed as a photographed video on the monitor 91 via a multiplexer (MUX) 52.

At this time, the central processing unit (CPU) 51 distinguishes daytime and nighttime based on a signal from the illuminance sensor 22, and selectively operates the wide view camera 31 and the teleview camera 32 according to daytime and nighttime. You may control to.

Further, when the moving object is detected by the multiplexer (MUX) 52, the central processing unit (CPU) 51 operates the teleview camera 32 to enlarge only the moving object, and monitors 91. Alternatively, the enlarged video may be displayed on the uppermost side of the basic screen for a predetermined time by the picture-in-picture (PIP) function of the multiplexer (MUX) 52 to alert the administrator.

On the other hand, in the present invention, as shown in FIG. 6, even after the surveillance camera is provided, the function switch 61 and the reference value (brightness, gain, aperture value) of the camera are set according to the change of the surrounding environment. The control knob 62 can be used for easy control, and the value selected by the moving stick 64 and the enlargement switch 65 is transmitted to the central processing unit (CPU) 51 to move or enlarge the image taken by the camera. It is possible to set the exact position of the camera while checking using the test monitor 94.

At this time, an external input port 63, a sensor input port 66, and an output port 67 are separately provided on the key adjustment panel 60, and video signals from the external camera 92 are collectively output by a multiplexer (MUX) -52. The central processing unit (CPU) 51 can perform more reliable control based on a sensing signal from an external sensor 93 (for example, a heat sensing sensor for confirming the presence or absence of a moving animal). The signal can be easily confirmed using the test monitor 94 in the immediate vicinity of the camera.

Of course, instead of the external input port 63, a wireless reception port (not shown) may be provided to wirelessly receive an image captured by the external camera 92.

In addition, since the present invention includes the remote control receiving unit 23, the administrator outputs the camera reference values (brightness, gain, aperture value) and the monitor using a remote control (not shown). Needless to say, the position and size of the video signal to be transmitted can be freely and wirelessly controlled, and in addition, remote control can be performed by separate wired communication (for example, RS485 communication). .

As described above, the surveillance camera capable of photographing the blind spot zone according to the present invention operates based on the flowchart shown in FIG.

First, in order to apply the basic setting value of the surveillance camera, the camera is set (S10), and the illuminance sensor 22 is used to determine whether or not the surrounding illuminance is equal to or higher than the reference illuminance (S20).

At this time, when the surrounding illuminance is lower than the reference illuminance, the first and second infrared light emitting diodes (IR-LEDs) 21 and 81 are turned on and turned on (S30), and the wide view camera 31 and the The review camera 32 and the entire view camera 80 are activated (S40).

Also, it is determined whether or not there is a key input on the key adjustment panel 60 (S50). If there is a key input, the set value is changed by the input and the camera set is readjusted (S51). Return to step (S20).

At this time, if it is determined that there is an input signal of the moving stick 64 (S52), the video imaged by the input signal is moved up, down, left and right to adjust the position of the displayed object biased to one side (S53). If it is determined that there is an input signal of the enlargement switch 65 (S54), the subject photographed by the input signal is enlarged (S55).

Next, the images captured by the plurality of cameras 31, 32, and 80 are transmitted to the multiplexor (MUX) 52 (S60), and the multiplexor (MUX) 52 outputs independent images for each channel to the monitor 91 (S70). ) Are sequentially performed.

The video displayed on the monitor 91 can be changed by various methods. In the present invention, an embodiment that is actually applied will be briefly described with reference to FIGS.

FIG. 7 shows images taken by the three cameras 31, 32, and 80 employed in the present invention. The left side is the entire front image taken by the wide view camera 31, the center is the front center region taken by the teleview camera 32, and the right side is a blind spot area not detected by the wide view camera 31. (For example, a side surface) is taken by the whole view camera 80.

FIG. 8 shows an image captured by the three cameras 31, 32, and 80 divided into one screen by a multiplexor (MUX) 52 and displayed.

At this time, as shown in FIG. 9, depending on the position of the photographed subject, the video photographed by the teleview camera 32 may be photographed with a bias toward one side, and thus provided on the key adjustment panel 60. It is possible to move the image captured by the moving stick 64 up and down, left and right, or to adjust the position of the subject by a separate program while being output to the monitor 91.

Further, according to the present invention, as shown in FIG. 10, when it is necessary to enlarge a photographed image, the photographed image is magnified by an enlargement switch 65 provided on the key adjustment panel 60, or as shown in FIG. As shown in FIG. 12, the size of the subject can be adjusted by a separate program while being output to the monitor 91. As shown in FIG. 12, one of the images is displayed on the whole, and the remaining images are displayed. You may display on a lower stage by a picture in picture (PIP) system.

On the other hand, when the video signal of the external camera 92 is transmitted through the external input port 63 of the key adjustment panel 60, the video imaged by the external camera is simultaneously displayed on the monitor as shown in FIGS. (Lower right image in FIG. 13, middle lower image in FIG. 14).

As described above, the present invention is not limited to the specific embodiments described above, and those who have ordinary knowledge in the technical field to which the present invention belongs without departing from the gist of the present invention claimed in the claims. Anyone can make various changes.

10: Body 11: Front cover 12: Back cover 13: Through hole 14: Video cable 20: Front panel 21: First infrared light emitting diode (IR-LED)
22: Illuminance sensor 23: Remote control receiver 30: Camera panel 31: Wide view camera 32: Teleview camera 40: Power panel 50: Control panel 51: Central processing unit (CPU)
52: Multiplexer (MUX)
60: Key adjustment panel 61: Function switch 62: Adjustment knob 63: External input port 64: Moving stick 65: Enlarging switch 66: Sensor input port 67: Output port 70: Intermediate support base 71: Support shaft 80: Whole view camera 81 : Second infrared light emitting diode (IR-LED)
90: Digital video recorder (DVR)
91: Monitor 92: External camera 93: External sensor 100: Main body 200: Sub body 210: First rotation axis 211: Second rotation axis

Claims (7)

In a surveillance camera equipped with a wide view camera that captures the entire front on the main body and a teleview camera that optically zooms in and captures only the preselected area,
A sub-body with an entire view camera is attached to one side of the main body so that a blind spot can be photographed and rotated in the front-rear and left-right directions, and an image taken by the entire view camera is a main body multiplexer (MUX). Sent to
The central processing unit (CPU) of the main body controls a multiplexer (MUX) to selectively output a video signal photographed by each camera by a picture-in-picture (PIP) method. Can be photographed surveillance camera. The main body includes a front panel having a first infrared light emitting diode (IR-LED) and an illuminance sensor for night photography, and an image photographed by each camera is converted into a video signal to be a multiplexor (MUX). A camera panel for transmitting; a power panel for controlling power supply; and a control panel for selectively operating each camera in accordance with surrounding conditions, wherein the sub-body has a second infrared light emission for night photography. A diode (IR-LED) is provided. In the central processing unit (CPU) of the control panel, the first and second infrared light emitting diodes (IR-LED) are turned on based on the signal of the illuminance sensor, and each camera The multiplexor (MUX) is controlled so that the video shot in can be selectively output. In the multiplexor (MUX), motion is detected on the screen. For example, a predetermined electrical signal is generated and transmitted to a central processing unit (CPU), and a video signal transmitted from each camera based on a control signal of the central processing unit (CPU) is converted into a picture-in-picture (PIP) signal. The surveillance camera capable of photographing a blind spot zone according to claim 1, wherein the surveillance camera is capable of photographing the blind spot zone. The main body is provided with a plurality of key adjustment panels with adjustment devices. The key adjustment panel includes an external input port for receiving an external video signal and transmitting it to a multiplexer (MUX), and an external One or more of a sensor input port that receives a sensor signal and transmits it to a central processing unit (CPU) and an output port that outputs a video signal captured by the main body and sub-body to a test monitor are provided. The surveillance camera capable of photographing a blind spot according to claim 1. The sub-body is provided with a first rotation shaft that can rotate 360 ° or more in the x-axis direction and a second rotation shaft that can rotate 360 ° or more in the y-axis direction. A surveillance camera capable of photographing the blind spot area according to Item 1. 2. The blind spot zone according to claim 1, wherein at least one of the wide-view camera, the teleview camera, and the whole-view camera is configured by a variable focus lens having a variable focal length. Surveillance camera. In the surveillance camera control method,
A camera setting step (S10) to which the basic setting values of the camera are applied;
Determining whether or not the surrounding illuminance is greater than or equal to the reference illuminance using the illuminance sensor (S20);
A step of turning on and turning on the first and second infrared light emitting diodes (IR-LEDs) when the surrounding illuminance is less than or equal to the reference illuminance (S30);
A step (S40) in which the wide view camera, the teleview camera, and the whole view camera operate;
Determining whether there is a key input on the key adjustment panel, changing the set value in accordance with the key input, and re-adjusting the camera set (S50);
A step (S60) in which video captured by each camera is transmitted to a multiplexer (MUX);
A multiplexer (MUX) outputting independent video for each channel to the monitor (S70);
The control method of the surveillance camera which can image | photograph the blind spot area characterized by these being performed in this order. In step S50, when it is determined that there is an input signal of the moving stick (S52), the image captured by the input signal is moved up and down and left and right to adjust the position of the displayed subject biased to one side ( S53) or
7. The surveillance camera capable of photographing a blind spot according to claim 6, wherein when it is determined that there is an input signal of an enlargement switch (S54), the subject photographed by the input signal is enlarged (S55). Control method.

Images