KR102294403B1 - Cctv camera with the wiper - Google Patents

Abstract

According to one embodiment of the present invention, provided is a CCTV camera, which includes: a camera housing having a space portion (W) therein; a transmission unit installed on the front side of the camera housing and made of a bracket and tempered glass; a wiper unit installed on the bracket of the transmission unit and removing foreign substances attached to the tempered glass; an imaging unit installed in the space portion (W) of the camera housing and generating a video image; and a wiper driving unit controlling the wiper unit. The wiper unit consists of a wiper and a motor. The wiper driving unit includes a timer and a control unit, and the control unit outputs a rotation signal to the motor based on a driving signal of the timer. The control unit is configured to control the motor in a rotational mode or a reciprocating mode.

Description

CCTV camera with wiper {CCTV CAMERA WITH THE WIPER}

The present invention relates to a CCTV camera, and more particularly, to a CCTV camera capable of effectively removing foreign substances on the front tempered glass and on the wiper by installing a wiper capable of reciprocating left and right driving or 360-degree rotation driving. .

In recent years, the installation of CCTV cameras for various purposes such as methods and fires is expanding.

A CCTV camera is provided with a front tempered glass on the front side of a camera housing having an inner space, and an imaging unit including a lens and an image sensor in the inner space of the camera housing.

When the CCTV camera configured as described above is installed in a place where dust and dust are generated, for example, on a roadside or in a workplace, foreign substances are attached to the front tempered glass, so it is difficult for the imaging unit installed inside the camera housing to obtain a clear imaging area.

A technique for installing a wiper on the front tempered glass of a CCTV camera is known.

The CCTV camera disclosed in Korean Patent Application Laid-Open No. 10-2012-0112913 includes a case having an internal space so that a camera module can be built in and a transparent window on the front, and a sensor for detecting whether foreign substances are present in the transparent window; , a wiper provided rotatably on the front side of the case to receive power from a driving motor to remove foreign substances present in the transparent window, and a storage tank provided in the inner space and a pump to connect the supplied water as a medium. It consists of a spray nozzle that sprays on the front of the transparent window.

The prior art document is configured to install a wiper on a transparent window of a CCTV camera, and drive the wiper when a foreign material is detected from a sensor to remove foreign material from the transparent window.

As such, the wiper is installed on the transparent window so that the door can remove foreign substances, but the wiper leaks due to long-time use. it may not be In addition, when the wiper is operating, foreign substances may adhere to the wiper brush and rotate together with the foreign substances.

Laid-open Patent Publication No. 10-2012-0112913, CCTV for ships with wipers Unexamined Patent Publication No. 10-2012-0005783, inspection camera equipped with foreign matter removal and light blocking function Registered Patent Publication No. 10-1736299, Industrial CCTV with air purge unit Registered Patent Publication No. 10-0912289, a device for removing foreign substances from the front of a CCTV camera

An object of the present invention is to provide a CCTV camera having a wiper that can effectively remove foreign substances attached to the front tempered glass.

Another object of the present invention is to provide a CCTV camera having a wiper that can effectively remove foreign substances attached to the wiper when the wiper is driven.

The problems to be solved by the present invention are not limited to the aforementioned problems. Other technical problems not mentioned will be clearly understood by those of ordinary skill in the art to which the present invention pertains from the following description.

A CCTV camera according to an embodiment of the present invention includes a camera housing 100 having a space portion W therein, a transmission portion 200 installed on the front side of the camera housing, and a bracket and tempered glass, and the transmission portion A wiper unit 300 installed on the bracket of the to remove foreign substances attached to the tempered glass, an imaging unit 400 installed in the space portion W of the camera housing and generating a video image, and the wiper unit to control the including a wiper driving unit 500,

The wiper unit 300 includes a wiper 310 and a motor 320 , the wiper driving unit 500 includes a timer 510 and a control unit 520 , and the control unit 520 includes a timer driving signal. Outputs a rotation signal to the motor based on the , and the control unit 520 is configured to control the motor in a rotational motion mode or a reciprocating motion mode.

The wiper drive unit according to the present invention has a rotational mode or a reciprocating mode.

In the rotary motion mode, the wiper rotates forward or backward 360 degrees from the axis center of the wiper, and in the reciprocating motion mode, the wiper rotates at least at an angle between the outside of the tempered glass and the outside of the bracket with respect to the shaft center of the wiper. can have

As an embodiment, in the case of the rotational movement mode, the wiper rotates in one direction to remove foreign substances on the tempered glass, then moves to the outside of the bracket, and then, when the wiper returns to the bracket, the brush portion of the wiper is the edge of the bracket (210a). ) while in contact with the brush, and in the case of reciprocating motion, the wiper rotates in one direction to remove the foreign material on the tempered glass, then moves further to the outside of the bracket, and then moves the wiper in the other direction. while rotating, the brush part of the wiper contacts the edge 210a of the bracket to remove foreign substances attached to the brush part.

According to the present invention, the wiper driving mode of the control unit has a rotational mode or a reciprocating mode. According to this configuration, foreign substances attached to the brush are removed from the edge of the bracket when the wiper is driven. Accordingly, it is possible to prevent the foreign substances removed from the tempered glass from returning to the tempered glass.

1 is a perspective view of a CCTV camera according to the present invention.
2 is a cross-sectional view of a CCTV camera according to the present invention.
3 shows a wiper of the wiper part according to the present invention.
4 is a configuration diagram of a wiper driving unit according to the present invention.
5 is a front view of a CCTV camera according to the prior art.
6 shows the driving range of the wiper according to the prior art.
7 is a view showing a rotational motion mode and a reciprocating motion mode of the wiper unit according to the present invention.
8 is a diagram illustrating the removal of foreign substances adhering to the brush part of the wiper in the reciprocating motion mode.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. For convenience of description, components shown in the drawings may be omitted or schematically represented.

The CCTV camera according to the present invention is installed in a place where dust or dust is generated, and includes a wiper that can effectively remove foreign substances attached to the front tempered glass of the camera housing.

1 is a perspective view of a CCTV camera according to the present invention, Figure 2 is a cross-sectional view of the CCTV camera according to the present invention.

The CCTV camera according to the present invention includes a camera housing 100 having a space (W) therein, a transmission part 200 installed on the front side of the camera housing, and a transmission part 200 made of a bracket and tempered glass, and installed on the bracket of the transmission part A wiper unit 300 for removing foreign substances attached to the tempered glass, an imaging unit 400 installed in the space W of the camera housing and generating an image image, and a wiper driving unit 500 for controlling the wiper unit ) is included.

The CCTV camera according to the present invention may be connected to a management server (not shown) through wired or wireless. The management server displays and stores the captured video image. Meanwhile, the administrator can check the captured video image through the monitor connected to the management server.

The camera housing 100 has a space (W) therein. The transmission part 200 and the wiper part 300 are installed on the front side of the camera housing, and the imaging part 400 and the wiper driving part 500 which will be described later are installed in the space part W of the camera housing.

The transmission part 200 is made of a bracket 210 and tempered glass 220 . The transmission part 210 has an annular ring shape with a hole in the center, and the tempered glass 220 is installed in the hole.

On the other hand, a wiper part 300 to be described later is installed in the bracket.

The wiper part 300 is installed on the bracket of the transmission part 200 . The wiper unit removes foreign substances such as rainwater, dust, and dust on the tempered glass.

The wiper unit 300 is connected to a wiper driving unit 500 to be described later, and reciprocates or rotates according to a signal from the wiper driving unit. Accordingly, foreign substances attached to the tempered glass may be removed.

The wiper unit 300 according to the present invention includes a wiper 310 , a motor 320 , and a position sensor 330 .

The wiper 310 is coupled to the bracket 210 of the transmission part 200 . The wiper may rotate forward or reverse according to the rotation of the motor 320 .

3 shows a wiper of the wiper part according to the present invention.

Referring to the drawings, the wiper 310 according to the present invention includes an edge portion 311 and a brush portion 312 . The edge part may be made of a stainless material, and the brush part may be made of a polyamide material. The brush portion preferably has a diameter of at least 0.09 to 1.80 mm and an elastic modulus of 2.5 to 3.5 GPa for effective foreign matter removal.

Most of the brush parts of the conventional wiper use a rubber material, but the rubber material is removed by pushing foreign substances on the tempered glass in the rotational direction. The brush unit according to the present invention removes a method of brushing off foreign substances from the edge of the front bracket after attaching the foreign substances.

The motor 320 rotates according to a control signal of the wiper driving unit 500 to be described later. The motor may be a stepper motor.

The position sensor 330 detects the position of the wiper. The position sensor may be any one of a synchro, a resolver, and an optical encoder. The position sensor 330 detects the rotational displacement and outputs the detected position data to the controller 520 of the wiper driving unit 500 .

The imaging unit 400 generates a video image. The imaging unit may include a lens, an image sensor, and an image circuit unit. The video image is output to the wiper driver and the management server.

4 is a configuration diagram of a wiper driving unit according to the present invention.

The wiper driver 500 according to the present invention includes a timer 510 and a controller 520 . The wiper driver 500 controls the motor 320 based on signals from the position sensor 330 and the timer 520 .

The timer 510 outputs a driving signal to the controller 520 at a predetermined cycle. The timer 510 may have a different cycle depending on the installation environment. For example, in a working environment with a lot of dust and dust, the driving signal may be output with a short cycle, and when installed in a general facility, the driving signal may be output with a relatively long cycle.

The control unit 520 outputs a rotation signal to the motor based on the driving signal of the timer. The control unit also outputs a stop signal to the motor based on the position signal of the position sensor. The control unit detects the stop position of the wiper and drives the motor to control the wiper to have a rotational motion mode or a reciprocating motion mode.

The motor 320 rotates at a predetermined rotation angle according to a signal from the controller. In the case of the rotary motion mode, it can rotate forward or reverse 360 degrees, and in the reciprocating motion mode, the rotation angle of the wiper can be moved by an angle greater than at least 135 degrees.

In the description of the present invention, the wiper control operation is performed according to the signal of the timer as an embodiment, but as another embodiment, a luminance detector for detecting the luminance of the video image is further installed, and the luminance detector is based on the change in luminance A driving signal may be output to the control unit.

In this case, the luminance detection unit converts the video image from the RGB color space system to the HSI color space system, detects the luminance signal in the HSI color space system, and then changes the luminance signal after one wiper rotation or one reciprocation operation to a predetermined reference value. It may be configured to output a wiper stop signal in the case of less than or equal to a wiper stop signal, and output a wiper driving signal when the change in the luminance signal after one wiper rotation operation or one reciprocating operation is greater than or equal to a predetermined reference value.

Figure 5 is a front view of a CCTV camera according to the prior art, Figure 6 shows the driving range of the wiper according to the prior art.

Referring to FIG. 5 , the wiper of the wiper unit has a rotation shaft installed below the bracket 210 of the transmission unit.

6 shows a location where dust is collected when the wiper is driven, and dust is collected on the left and right sides (DTA) of the wiper. Some of the dust collected in this way can move back to the tempered glass when the wiper is driven.

The wiper unit according to the present invention has a foreign matter removal function.

7 shows a rotational motion mode and a reciprocating motion mode of the wiper unit according to the present invention.

The wiper unit according to the present invention has a rotational mode or a reciprocating mode.

Referring to FIG. 7( a ), in the rotational motion mode, the wiper rotates forward or reverse 360 degrees from the center of the axis of the wiper.

As an embodiment, in the case of the rotational movement mode, the wiper rotates in one direction to remove foreign substances attached to the tempered glass, and then moves to the outside of the bracket. After further rotation, the wiper returns to the bracket. At this time, the brush part comes into contact with the edge 210a of the bracket to remove foreign substances on the brush part, and then removes the foreign substances on the tempered glass again.

Referring to Figure 7 (b), in the case of the reciprocating motion mode, one stop position of the wiper may be outside the tempered glass, and the other stop position may be outside the bracket. The wiper according to the present invention has an angle between at least the outside of the tempered glass and the outside of the bracket with respect to the axial center of the wiper. Preferably, the reciprocating angle of the wiper may have an angle greater than at least 135 degrees.

As an embodiment, in the case of the reciprocating motion mode, the wiper rotates in one direction to remove foreign substances attached to the tempered glass and then further moves to the outside of the bracket. Thereafter, while rotating in the other direction, the brush part of the wiper contacts the edge 210a of the bracket to remove foreign substances attached to the brush part.

8 is a diagram illustrating the removal of foreign substances adhering to the brush part of the wiper in the reciprocating motion mode.

In the reciprocating motion mode, the wiper rotates in one direction to remove foreign substances on the tempered glass, and then rotates further to the outside of the bracket. After that, the wiper rotates again in the other direction to return to the initial position. 8 shows rotation in one direction and then rotation in the other direction.

Referring to the drawing, the wiper moves from position S through position A to position B. While moving from position A to position B, the brush unit 312 comes into contact with the edge 210a of the bracket and moves to the brush unit. The attached foreign material will come off. In the drawings, reference numerals aa and bb denote points of contact with the corners of the bracket at positions A and B, respectively.

In addition, even in the rotation mode, when the brush part of the wiper rotates from the outside of the bracket to the bracket, the brush part of the wiper contacts the edge of the bracket and foreign substances attached to the brush part can be removed. In other words, foreign substances adhering to the brush part of the wiper can be removed by brushing off by contact from the corner part of the bracket.

According to the present invention, the wiper driving mode of the control unit has a rotational mode or a reciprocating mode. According to this configuration, foreign substances attached to the brush are removed from the edge of the bracket when the wiper is driven. Accordingly, it is possible to prevent the foreign substances removed from the tempered glass from returning to the tempered glass.

As mentioned above, although the present invention has been described in detail through specific embodiments, the present invention is not limited to the above embodiments, and various modifications are possible by those of ordinary skill within the scope of the technical spirit of the present invention.

100: camera housing
200: transmission part
210: bracket
210a: edge of bracket
220: tempered glass
300: wiper part
310: wiper
311: border part
312: brush part
320: motor
330: position sensor
400: imaging unit
500: wiper driving unit
510: timer
520: control unit
W: space
C: Shaft of wiper (or motor)

Claims (3)

A camera housing 100 having a space (W) therein, a transmission part 200 installed on the front side of the camera housing and made of a bracket and tempered glass, and foreign substances installed in the bracket of the transmission part and attached to the tempered glass A wiper unit 300 to remove
The wiper unit 300 includes a wiper 310, a motor 320, and a position sensor 330, and the wiper 310 includes a brush unit 312 having elasticity,
The wiper driving unit 500 includes a timer 510 and a control unit 520, and the control unit 520 outputs a rotation signal to the motor 320 based on the driving signal of the timer,
The position sensor 330 detects the rotational displacement of the wiper, and outputs the detected position data to the control unit of the wiper driving unit,
The control unit 520 of the wiper driving unit 500 has a rotational mode or a reciprocating mode, and in the rotational mode, the wiper rotates 360 degrees, and in the reciprocating mode, the wiper rotates in one direction and then in the other direction. rotates to
In the case of the rotary motion mode, the wiper rotates in one direction to remove foreign substances on the tempered glass, moves to the outside of the bracket, and then when the wiper returns to the bracket, the brush part of the wiper contacts the edge 210a of the bracket. While removing foreign substances from the brush part,
In the case of the reciprocating motion mode, the wiper rotates in one direction to remove foreign substances on the tempered glass, then moves further to the outside of the bracket, and then, as the wiper rotates in the other direction, the brush part of the wiper is the edge (210a) of the bracket. ) CCTV camera, characterized in that it removes foreign substances on the brush part while in contact.


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