KR20150114178A - Control device for infrared LED of dom type CCTV camera - Google Patents

Abstract

The present invention relates to an infrared LED control device of a dome-type surveillance camera. The infrared LED control device turns off an infrared LED on a location recessed toward the inside of a housing according to a tilt angle or a rotation angle. The dome-type surveillance camera is capable of photographing at night as multiple infrared LEDs are installed in a camera module, which can adjust a photographing angle. The infrared LED control device includes: a photographing angle detection unit which detects a tilt angle or/and a rotation angle of the camera module; and a control unit which predetermines an infrared LED on a location where infrared rays can be reflected by the housing and components in the housing according to the tilt angle or/and the rotation angle of the camera module, and controls the infrared LED by automatically turning off the infrared LED based on a detected signal of the photographing angle detection unit.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an infrared LED control device for a domed type surveillance camera,

The present invention relates to an infrared LED control apparatus for a dome-type surveillance camera, and more particularly, to a tilt angle control apparatus for a dome-type surveillance camera in which, when a tilt angle of a camera is required to be 90 degrees, It is possible to automatically or manually turn off the corresponding infrared LED by sensing the infrared rays reflected from the device and the housing in order to improve the effect of the unnecessary power consumption due to the infrared rays reflected by the reflected light. To an infrared LED control device of a dome type surveillance camera.

A general CCTV (Closed Circuit Television) system is installed in various places and locations, and captures video images and sends them to a management system. As an unmanned system, it enables on-site monitoring through video from a remote site.

In recent trends, there is an increasing use of a pan / tilt surveillance camera capable of photographing the surroundings of the camera module while rotating the camera module at a predetermined interval by a user's operation or setting program.

As an example of such a conventional surveillance camera, there is a domed surveillance camera to which a camera module is fixed, and a domed surveillance camera to which a camera tilt is possible. Particularly, these dome-type surveillance cameras are proposed to use an infrared LED so as to be able to shoot at night or at night.

As an example of a conventional domed type surveillance camera, disclosed in Japanese Patent Laid-Open Nos. 10-2008-0048260 and 10-0671223.

In such a dome-type surveillance camera, a base plate is installed around the camera lens for night shooting, and a plurality of infrared LEDs are installed on the base plate, and infrared rays are irradiated forward to shoot at night.

However, when the camera is tilted at an angle of 90 degrees, some of the infrared LEDs are inserted into the housing, so that infrared rays generated by the corresponding infrared LEDs cause reflection inside the housing, thereby affecting the shot image .

1 is a structural explanatory view of a surveillance camera provided with an infrared LED.

The dome-type surveillance camera includes a surveillance camera bracket 1, a surveillance camera device mounted on the surveillance camera bracket 1, a housing 2 mounted on the bracket 1, and a camera module 10 And a dome cover 3 is coupled to the outer side of the housing 2. As shown in Fig. The camera module 10 is provided with a circular infrared LED base 12 around the lens unit 11 and a plurality of infrared LEDs 13 arranged on the infrared LED base 12.

However, in such a general surveillance camera, when the photographing angle of the camera module 10 is tilted by 90 degrees, a part of the infrared LED base 12 enters the inside of the housing 2 and is located inside the housing Infrared rays generated by the infrared LED 13a are reflected by the housing inner housing or the housing 2 to influence the photographing.

When the dome cover is made of transparent window only 180 degrees forward of the dome-type surveillance camera, when the camera module is rotated 90 degrees from the front center to the left or right direction, the infrared LED inside the rotation direction rotates the dome- So that the problem is caused by the reflection of the infrared rays.

In the normal direction and angle fixed type surveillance camera, the photographing angle and direction are set and adjusted during the initial installation, and the illuminance sensor automatically turns on / off the infrared LED. At this time, the entire infrared LED is turned on / off do. Therefore, when some of the infrared LEDs enter the inside of the housing according to the tilt angle or the rotation direction as described above, not only deterioration of the photographed image due to infrared reflection but also unnecessary power consumption occurs because the infrared LEDs that are hidden inside the housing are turned on unnecessarily.

[Patent Document 1] Japanese Patent Application Laid-Open No. 10-2008-0048260 [ Patent No. 10-0671223 (Jan. 12, 2007)

In order to solve the problem that when a camera module is tilted at an angle of 90 degrees in a dome-type surveillance camera, some infrared LEDs enter the inside of the housing and infrared rays are reflected by the inside of the housing or housing, An object of the present invention is to provide an infrared LED control device of a dome-type surveillance camera that solves the problem caused by infrared reflection by turning off the corresponding infrared LED shaded in the housing according to the tilt angle of the camera module.

Further, according to the present invention, when the camera module is rotated by 90 degrees, an infrared ray sensor is provided for each infrared ray LED that can enter the housing and generate infrared ray reflection, so that the corresponding infrared ray LED can be turned off according to the received infrared ray amount .

A control device for a dome type surveillance camera according to the present invention includes:

A dome type surveillance camera in which a plurality of infrared LEDs are installed in a camera module capable of adjusting a photographing angle so that night photography is possible,

A photographing angle detector for detecting a tilt and / or a rotation angle of the camera module;

An infrared LED at a position where infrared rays can be reflected by a housing and an internal structure of the housing according to a tilt and / or a rotation angle of the camera module is set in advance, and an infrared LED And a control unit for automatically turning off the control unit.

The photographing angle detection unit

A tilt angle detector for detecting a vertical tilt angle of the camera module,

And a rotation angle detector for detecting a rotation angle of the camera module.

The photographing angle detection unit

A base of the camera module, and a magnet and a magnet switch provided in the housing.

In another embodiment, the control apparatus for a dome type surveillance camera according to the present invention includes:

A dome type surveillance camera in which a plurality of infrared LEDs are installed in a camera module capable of adjusting a photographing angle so that night photography is possible,

An infrared ray LED disposed at a position close to the set infrared ray LED and capable of detecting the reflected infrared ray by detecting the infrared ray in a position where the infrared ray can be reflected by the housing and the inside of the housing according to the tilt angle of the camera module, A sensor unit;

And a control unit for turning off the corresponding infrared LED when the detected amount of the infrared ray is equal to or greater than a predetermined infrared ray detection amount according to the infrared ray detection amount of the infrared ray detection sensor unit.

Wherein the infrared sensor unit comprises:

And a plurality of infrared ray detection sensors disposed adjacent to the infrared ray LEDs at predetermined positions,

Wherein the control unit independently controls the corresponding infrared LEDs based on the infrared ray detection amounts of the plurality of infrared ray detection sensors.

In addition,

And an infrared ray filter having a predetermined infrared ray transmittance is further attached on the infrared ray sensor.

Further, the infrared ray detection sensor unit may include:

A temperature compensation circuit for further automatically thermally compensating the output level of the infrared sensor based on the output level of the temperature sensor is further provided in addition to a temperature sensor for detecting the ambient temperature of each infrared sensor. .

According to the present invention, when the photographing angle is adjusted by tilting the camera module at an angle of 90 degrees in the dome-type surveillance camera, the infrared rays generated from some infrared LEDs are reflected on the housing and the inner housing to prevent image interference The corresponding infrared LED is turned off according to the tilt angle to solve the image interference problem and unnecessary power consumption can be reduced. Further, according to the present invention, an infrared ray detecting sensor is provided for each infrared ray LED at a position where infrared ray reflected light can be generated, and is individually controlled by the infrared ray detecting amount of each infrared ray detecting sensor, There is an effect that only the LED can be selectively turned off. In addition, a thermal compensation circuit is employed to prevent the output fluctuation of the infrared ray sensor, which may be generated by infrared rays reflected when the apparatus is used for a long period of time, to prevent an error operation due to heat from being reflected by infrared rays. In addition, an infrared ray cutoff filter having a predetermined infrared ray transmittance is attached to the infrared ray detection sensor, thereby improving the reliability of the infrared ray LED off due to infrared ray detection.

1 is an exemplary view showing a configuration of a conventional domed type surveillance camera.
2 is a block diagram showing an infrared LED control configuration of a dome-type surveillance camera according to the present invention.
3 is a block diagram of an infrared LED control device of a domed surveillance camera according to the present invention.
4 is a diagram illustrating a configuration example of a tilt angle detecting unit of an infrared LED control apparatus of a domed surveillance camera according to the present invention,
Fig. 5 is a diagram showing a magnet installation example of a magnet switch of an infrared LED control unit of a dome type surveillance camera according to the present invention. Fig.
6 is a configuration diagram of an infrared LED control apparatus using an infrared sensor of a domed surveillance camera according to the present invention.
FIG. 7 is a block diagram of an infrared LED control apparatus according to another embodiment of the present invention using a infrared sensor of a dome-type surveillance camera. FIG.
8 is a circuit blow diagram of an infrared LED control device of a domed surveillance camera according to the present invention.

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

A control device for a dome type surveillance camera according to the present invention includes:

A dome-type surveillance camera in which a plurality of infrared LEDs (13) are installed in a camera module (10) capable of tilting and / or rotating a camera module (10)

A photographing angle detecting section (110) for detecting the left and right vertical photographing angles of the camera module (10);

An infrared ray lamp 13a which automatically turns off the infrared ray LED 13a at a position where the infrared ray can be reflected by the housing 2, the housing inner mechanism or the dome cover 3 according to the left and right vertical photographing angles of the camera module 10, And an LED control unit (120).

The photographing angle detection unit 110,

A tilt angle detector 111 for detecting a vertical tilt angle of the camera module 10;

And a rotation angle detecting section (112) for detecting a horizontal rotation angle of the camera module (10)

The infrared LED control unit 110,

The infrared LED 13a is automatically turned off at a position where the infrared LED is reflected and reflected by the housing based on the tilt angle detected by the tilt angle detecting unit 111 and the rotation angle of the rotation angle detecting unit 112 .

The infrared LED control unit 120,

A plurality of infrared LEDs are classified into a plurality of groups, and the infrared LEDs are controlled for each group based on the tilting angle and the rotation angle of the camera module 10.

The photographing angle detection unit 110 includes a plurality of magnets and a plurality of magnet switches 102 mounted on the housing 2 in correspondence with the infrared LED base 12 of the camera module 10,

The infrared LED control unit 110 detects whether the tilt angle or the rotation angle of the camera module 10 is an angle to turn off the infrared LED set by the plurality of magnet switches 102, And the infrared LED 13a at the corresponding position corresponding to the infrared LEDs 102 is turned off.

In another embodiment, the control apparatus for a dome type surveillance camera according to the present invention includes:

A dome-type surveillance camera in which a plurality of infrared LEDs (130) are installed in a camera module (10) capable of adjusting a photographing angle so that night photography is possible,

In order to detect an infrared LED at a position where infrared rays can be reflected by the housing and a mechanism inside the housing according to a tilt and a rotation angle of the camera module 10, an infrared ray sensor 101a - 101n for detecting reflected infrared rays;

And an infrared LED control unit 110 for turning off the corresponding infrared LEDs (LED1-LEDn) when the amount of infrared rays detected by the infrared detection sensors 101a-101n of the infrared detection sensor unit 101 is greater than a predetermined infrared ray detection amount .

The infrared detection sensor unit (101)

The infrared LED control unit 110 includes a plurality of infrared ray sensors 101a to 101n that are disposed adjacent to and installed in correspondence with the respective infrared ray LEDs LED1 to LEDn, And the infrared LEDs (LED1 - LEDn) are controlled independently based on the amount of infrared rays detected by the infrared LEDs (- 101n).

In addition, the infrared sensor unit 101 is provided with one infrared sensor 101a corresponding to each of a plurality of neighboring infrared LEDs LED_1_ LED_i,

The infrared LED control unit 110 is characterized in that the infrared ray detection amount detected by the infrared ray detection sensor 101a is simultaneously turned off when the infrared ray receiving amount of the infrared ray LED off level is detected and the corresponding infrared ray LED_1_LED_i is simultaneously turned off .

Meanwhile, the infrared ray detection sensor unit 101,

And an infrared ray filter 105 having a predetermined infrared ray transmittance is further attached on the light receiving surface of the infrared ray detection sensors 101a, ....

In addition, the infrared ray detection sensor unit 101 may detect,

A thermal compensation circuit (not shown) further includes a temperature sensor for detecting the ambient temperature of each infrared sensor 101 and automatically thermally compensates the output level of the infrared sensor 101 based on the output level of the temperature sensor 103). ≪ / RTI >

In the present invention, the infrared LED controller 110 may be configured to group and select the infrared LEDs at the positions to be covered by the tilt and rotation, so that the operator can select any one or a plurality of groups and turn them off And a manual selection switch 104 for inputting control. It has an up-down button and a selection button, and has a manual selection switch for selecting and turning off an infrared LED at a position where an infrared ray is to be blocked.

In a typical infrared surveillance camera, when the illuminance sensor is installed and the surveillance camera main control module 20 becomes lower than a predetermined illuminance, all the infrared LEDs 13 of the infrared LED unit 130 are turned on to perform shooting control. The present invention is described as an example in which the infrared LEDs that enter the housing according to the angle of the surveillance camera are turned off and the camera angle is manually fixed and fixed. However, the present invention is not limited thereto, And can be applied to a type that adjusts the shooting angle. In addition, there is a type in which infrared LEDs may be hidden depending on the vertical tilt angle depending on the type of the dome-type surveillance camera. In the hemispherical type having a transparent window with 180 degrees forward, when infrared rays are rotated 90 degrees in the left- The LED is hidden inside the housing or the opaque dome cover. Therefore, in the present invention, the tilt and / or the rotation angle are detected. However, the present invention is also applicable to the case where only one of the tilt and / or the rotation angle is detected.

2, when the camera module 10 is tilted and the angle of view is adjusted at an angle of 90 degrees, a part of the infrared LEDs 13a of the infrared LEDs 13 are moved in the housing 2 . The infrared LED 13a thus inserted into the housing is reflected by the housing, the internal structure, etc., and the reflected infrared rays enter the camera lens 11 to cause image deterioration.

Accordingly, in the present invention, when the imaging angle is fixed to the dome-type surveillance camera at the time of installation, the infrared LED 13a that enters the housing is turned off by using the present invention.

The tilting angle and the rotation angle of the camera module 10 are detected in order to know the infrared LED 13a entering the housing. 4, the hinge axis 10b fixed to the camera module 10, the hinge axis 10b fixed to the camera module 10, and the hinge axis 10b fixed to the camera module 10, for example, The rotary shaft of the variable resistor 111a is connected by the hinge shaft 10b to be rotatably connected to the variable resistance supporting portion 10d fixed to the hinge supporting portion 10c The variable resistor 111a is fixed and the infrared LED control unit 120 detects the variable resistance 111a resistance value change signal to detect the tilt angle. Likewise, when the camera module is mounted on the rotation disc and the camera module is rotated, a slide type variable resistor is provided to detect the rotation amount of the rotation disc when the rotation disc is rotated, and the rotation is controlled by the variable resistance value, The angle can be detected. Such tilt angle and rotation angle detecting means can utilize known techniques, and the configuration thereof is not described in detail in the present invention.

Tilt angle or / rotation angle detection is performed on the infrared LED base 12 of the camera module 10 as shown in Fig. 5 by vertically moving the magnets 102a And a magnet switch 102 is provided in the housing 2 to turn on the contact point when the magnet 102a installed on the infrared LED base 12 is turned on. The infrared LED control unit 120 controls each magnet The infrared LED 13a to be controlled by the switch 102 is set to detect which of the magnet switches 102 is turned on so that the corresponding infrared LED 13a is automatically turned off. When the magnet switch is turned on once, it is set to off, and when the corresponding magnet switch is turned on at the time of infrared LED off control, the corresponding infrared LED is controlled to be switched to the on mode again. Accordingly, even when the magnet switch is repeatedly turned on and off while adjusting the angle during installation, the corresponding infrared LED can be automatically turned off when a case of entering the housing of the infrared LED occurs.

In another embodiment of the present invention, an infrared ray sensor 101a may be provided for each infrared ray LED 13 to detect the amount of infrared ray reflected by each infrared ray sensor 101a, The corresponding infrared LED 13a is turned off according to the respective infrared ray detection amounts of the infrared ray detection sensor unit 101. [

It is assumed that the infrared sensor 101a-101n is provided with a sensor for each of the infrared LEDs (LED1-LEDn). However, the present invention is not limited thereto. The infrared LEDs (LED1-LEDi) may be grouped so that the infrared LED unit 130 of the corresponding group is turned off according to the infrared ray detection amount of the corresponding infrared ray sensor 101a.

In the case of controlling the infrared LED by installing the infrared ray sensor, an infrared ray filter 105 is installed on the light receiving surface for each infrared ray sensor 101a in order to prevent the occurrence of errors of the sensor due to the infrared rays around, Improves performance. For example, a filter film having an infrared transmittance of 50% is provided on the light receiving surface of an infrared sensor to prevent malfunction of the infrared sensor.

Further, in order to prevent malfunction of the infrared sensor due to the ambient temperature, a thermal compensation circuit 103 for detecting the ambient temperature for each infrared sensor and compensating the infrared detection value according to the temperature may be provided so as to perform temperature compensation do.

In addition, the present invention may be configured such that the manual selection switch 104 is provided to manually select and turn off the infrared LED. This can be controlled by providing an up / down button for sequentially selecting an infrared LED to the infrared LED control unit 120 and a setting button for turning off the selected infrared LED. In the case where the manual selection switch is provided, it is troublesome to select a large number of infrared LEDs one by one for off-control. Therefore, the infrared LEDs at positions that can enter the housing centered on the camera module are divided into four groups, , And the manual selection switch 104 selects four groups and turns off the infrared LEDs of the corresponding group.

As described above, according to the present invention, in the domed type surveillance camera, it is possible to automatically turn off some of the infrared LEDs that enter the housing depending on the angle of the camera, so that the infrared rays are emitted to the inside of the housing or the inside of the housing depending on the tilt angle or the rotation angle. It is possible to prevent the image from being deteriorated and reduce the power consumption due to turning on the infrared LED at unnecessary positions.

1: Surveillance camera bracket 2: Housing
3: Dome cover 10: Camera module
10b: a hinge shaft 10c, 10b:
11: Camera lens 12: Infrared LED base
13, 13a, LED1 - LEDn: Infrared LED
101: Infrared detection sensor part 101a-101n: Infrared detection sensor
102: Magnet switch 102a: Magnet
103: heat compensation circuit 104: manual selection switch
105: Infrared filter
110: photographing angle detecting unit 111: tilt angle detecting unit
111a: Variable resistor 120: Infrared LED control unit
130: Infrared LED unit

Claims (10)

A dome-type surveillance camera in which a plurality of infrared LEDs (13) are installed in a camera module (10) capable of tilting and / or rotating a camera module (10)
A photographing angle detecting section (110) for detecting the left and right vertical photographing angles of the camera module (10);
An infrared ray lamp 13a which automatically turns off the infrared ray LED 13a at a position where the infrared ray can be reflected by the housing 2, the housing inner mechanism or the dome cover 3 according to the left and right vertical photographing angles of the camera module 10, And an LED control unit (120).
The apparatus according to claim 1, wherein the photographing angle detecting unit (110)
A tilt angle detector 111 for detecting a vertical tilt angle of the camera module 10;
And a rotation angle detecting section (112) for detecting a horizontal rotation angle of the camera module (10)
The infrared LED control unit 110,
The infrared LED 13a is automatically turned off at a position where the infrared LED is reflected by the housing due to the tilt angle detected by the tilt angle detecting unit 111 and the rotation angle of the rotation angle detecting unit 112 Infrared LED control device of a dome type surveillance camera.
The apparatus of claim 1, wherein the infrared LED controller (120)
Wherein the plurality of infrared LEDs are grouped into a plurality of groups to control the infrared LEDs for each group based on the tilt angle and the rotation angle of the camera module (10).
The apparatus according to claim 1, wherein the photographing angle detecting unit (110)
An infrared LED base 12 of the camera module 10 and a plurality of magnets and a plurality of magnet switches 102 provided to correspond to each other in the housing 2,
The infrared LED control unit 110 detects whether the tilt angle or the rotation angle of the camera module 10 is an angle to turn off the infrared LED set by the plurality of magnet switches 102, And controls the infrared LEDs (13a) at corresponding positions corresponding to the infrared LEDs (102) to be off.
A dome-type surveillance camera in which a plurality of infrared LEDs (130) are installed in a camera module (10) capable of adjusting a photographing angle so that night photography is possible,
An infrared ray sensor part 101 for detecting infrared rays reflected by the housing and a mechanism inside the housing according to a tilt and a rotation angle of the camera module 10;
And an infrared LED control unit 110 for turning off the infrared LEDs (LED1 to LEDn) corresponding to the respective infrared ray detection sensors in accordance with the infrared ray reduction of the infrared ray sensors 101a to 101n of the infrared ray sensor unit 101 And the infrared LED control unit of the domed type surveillance camera.
6. The apparatus according to claim 5, wherein the infrared sensor unit (101)
Is a plurality of infrared ray detection sensors (101a - 101n) arranged so as to be disposed adjacent to and corresponding to the respective infrared ray LEDs (LED1 - LEDn)
The infrared LED control unit 110 independently controls the corresponding infrared LEDs LED1 to LEDn based on the infrared ray detection amounts of the infrared ray detection sensors 101a to 101n. Infrared LED control unit.
6. The apparatus according to claim 5, wherein the infrared sensor unit (101)
A plurality of infrared LEDs (LED_1_ LED_i) are grouped, and one infrared sensor (101a) is provided corresponding to one group,
The infrared LED control unit 110 is configured to simultaneously turn off the corresponding infrared LEDs (LED_1_LED_i) when the infrared ray detection amount detected by the infrared ray detection sensor 101a is an infrared ray reception level of a preset infrared ray LED off level Infrared LED control device of a dome type surveillance camera.
The infrared sensor unit according to claim 5, wherein the infrared sensor unit (101)
And an infrared ray filter (105) having a predetermined infrared ray transmittance is further attached on the light receiving surface of the infrared ray sensor (101a, ...).
The infrared sensor unit according to claim 5, wherein the infrared sensor unit (101)
A thermal compensation circuit (not shown) further includes a temperature sensor for detecting the ambient temperature of each infrared sensor 101 and automatically thermally compensates the output level of the infrared sensor 101 based on the output level of the temperature sensor 103) for controlling the infrared LED of the dome type surveillance camera.
6. The infrared LED control device according to claim 5,
The infrared LED control unit 110 may be configured to group and select infrared LEDs at positions to be shielded by tilting and rotation, and may be manually selected by an operator to select one or a plurality of groups, And a switch (104) for controlling the infrared LED of the dome-type surveillance camera.

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