KR20040087694A - Structure of vigilant board camera - Google Patents

Abstract

PURPOSE: A structure of a monitoring board camera is provided to use a separate filter and a lens for the day and the night by a simple configuration, while separately using all assemblies for the day and the night, thereby removing any inconvenience in photographing during the daytime and at night without a complex structure. CONSTITUTION: A lead screw(13) is interworked with a driving shaft of a motor(11). A mobile tool(15) configures one body with a lens supporting tool(17), and wherein one end thereof is wound on an outer circumference of the lead screw(13). A guide bar(23) is formed at the opposite side to the lead screw(13) on the basis of the lens supporting tool(17), and reliably guides a horizontal movement of the lens supporting tool(17). A horizontal movement guide portion(25) configures one body with the lens supporting tool(17), and is contacted with an outer circumference of the guide bar(23).

Description

Structure of vigilant board camera

The present invention relates to a surveillance board camera, and in detail, the filter usable in day / night is appropriately selected and used as necessary, and can be implemented in a single body, thereby reducing the production cost of the surveillance board camera, Once installed, the user also relates to a surveillance board camera that can be used continuously and conveniently without additional manipulation.

In general, a surveillance camera used for surveillance purposes has a functional requirement to capture a subject at a certain distance during the day and night, and for this purpose, a board camera is used as a general camera during the day and at night. There is infrared imaging to perform imaging. Furthermore, the board camera is an apparatus that employs an image pickup device that can be exemplified as a charge coupled device (CCD) on a substrate, converts light intensity into an electrical signal, and detects digitized image data from voltage variations according to light intensity. to be. In addition, the live element can only obtain the intensity of light, and therefore, in order to realize a color screen, a color filter that can obtain a required color in addition to the intensity of light must be further used.

On the other hand, since the imaging device reacts sensitively to infrared rays that are not recognized by the human eye, it is necessary to block infrared rays by using a filter that can block infrared rays during the day to obtain a high quality captured image. have. Furthermore, by adopting a filter that actively transmits infrared rays at night, it is possible to obtain an image by the image pickup device even at night when there is little visible light. That is, during the day and night, separate suitable filters are used to photograph the subject.

As such, in order to photograph images by using separate filters during the day and at night, conventionally, it is inconvenient to use complicated equipment that is implemented circuitally or to replace the necessary filters according to the time of day and night.

On the other hand, the visible light used by the board camera during the day has a wavelength of 380 nm to 780 nm, and the infrared light used by the board camera at night reaches a wavelength of 900 nm. Therefore, the distance between the focus due to the wavelength difference between the visible light and the infrared light is different, resulting in a shift in focus, and in order to improve the problems caused by the chromatic aberration, a more complicated surveillance camera structure is required. There was an inconvenience. In addition, there is a disadvantage that the price of the surveillance camera also increases by this structure.

The present invention has been created to improve the problems described above, and by employing a separate filter for day and night by a simple configuration driven mechanically, there is no difficulty in imaging day and night, reliability of operation An object of the present invention is to propose a structure of a high quality surveillance board camera.

In addition, the present invention allows all the aggregates, such as the lens, as well as the filters employed during the day and night to be used separately during the day and night, so that the complicated structure required for the correction of chromatic aberration is not required, further reducing the manufacturing cost An object of the present invention is to propose a structure of a surveillance board camera.

1 is a plan view of the filter operation unit in the monitoring board camera according to the present invention.

Figure 2 is a side view of the filter control unit in the monitoring board camera according to the present invention.

3 is a view for explaining the operation of the filter operation unit in the monitoring board camera according to the present invention.

<Explanation of symbols for the main parts of the drawings>

11 motor 13 lead screw 15 moving port

17 lens support 19 infrared transmission filter 21 optical low pass filter

23: guide bar 25: horizontal movement guide portion 27: base panel

29 circuit board 31 position sensor 33 imaging device

The structure of the monitoring board camera according to the present invention for achieving the object as described above includes a motor and a lead screw extending from the drive side of the motor; A lens supporter which includes a moving tool formed integrally with the outer circumference of the lead screw and includes an infrared transmission filter and an optical low pass filter on both sides of the body moved left and right so that different filters are used during the day / night. ; And a circuit board further formed under the lens support to form an image pickup device for capturing an image by light transmitted through the infrared transmission filter and the optical low pass filter.

By the configuration of the monitoring board camera as described above, even with a simple mechanical configuration, there is an effect that it is possible to implement a monitoring board camera that can be used to select each filter used in the day and night.

In addition, by separately using the lens and the filter used in the day and night, there is an effect that can further improve the quality of the image.

Hereinafter, with reference to the drawings to propose a specific embodiment of the present invention. However, the embodiment of the present invention is not limited to the present invention, and those skilled in the art who understand the spirit of the present invention can easily suggest another embodiment included in the scope of the idea.

1 is a plan view of a surveillance board camera according to the spirit of the present invention, Figure 2 is a side view of a surveillance board camera according to the spirit of the present invention.

Referring to Figs. 1 and 2, the configuration of the monitoring board camera according to the present invention will be described. Image capturing is exemplified by a circuit board 29 on which a plurality of circuit components are arranged and a CCD mounted on the circuit board 29. The element 33, the base panel 27 further formed on the upper surface of the circuit board 29, and the base panel 27 are operated left and right so that different lenses and filters are applied according to day and night. A lens support 17 for the purpose is included.

In addition, the configuration for the lens support 17 is stably operated left and right is further formed. In detail, one end of the lead screw 13 interlocked with the motor 11, the drive shaft of the motor 11, and the outer circumference of the lead screw 13 is wound, and the lens supporter 17 and one body The guide bar 23 for reliably guiding the left and right movement of the lens support 17 is formed on the opposite side of the lead screw 13 around the moving tool 15 and the lens support 17. And a horizontal movement guide part 25 forming one body with the lens supporter 17 and being in contact with the outer circumference of the guide bar 23.

The motor 11 is preferably a step motor in which the position of the lens support 17 can be clearly known by the angle at which it is rotated.

In addition, one lens among a pair of lenses formed on the left and right sides of the lens supporter 17 is an optical low pass for maintaining a clear image of the image picked up in the imaging device 33 by being used during the day and blocking infrared rays. Optical Low Pass Filter (OLPF) 21, and the other lens is used at night so that infrared rays can be sufficiently transmitted so that the infrared transmission filter 19 can be accurately formed on the image pickup device 33 by infrared rays. to be. On the other hand, the optical low pass filter 21 and the infrared transmission filter 19 may be fixed and integrally formed at the same time as the lens further formed to the rear or front thereof.

In addition, in order to detect the exact position of the lens used by the lens support 17, that is, the lens support 17, the position sensor 31 at a predetermined position of the guide bar 23 ) Is further formed. In addition, it is preferable that the correct position of the lens and the lens support 17 is known by the position sensor 31. In detail, a predetermined protrusion extending from the lens supporter 17 in addition to the horizontal movement guide portion 25 in order to allow the horizontal movement guide portion 25 to be detected or the position or time that is not detected is confirmed. Can be further formed.

In addition, at a predetermined position of the base panel 27, the light is transmitted to the image passing through the infrared transmission filter 19 or the optical low pass filter 21 to be aligned with the imaging device 33. An opening is formed at 33 to allow an image to form.

In detail, the movable tool 15 allows grooves having the same pitch as the lead screw 13 to be formed on the inner circumference of the plurality of extension portions 151, and the groove is fitted with a thread formed on the outer circumference of the lead screw 13. In combination, it is preferable to allow the movable tool 15 and the lens supporter 17 to be moved by the rotation of the lead screw 13.

In detail, the infrared transmission filter 19 is a glass material filter that transmits infrared rays so as to sense infrared light reflected by the infrared light source, so that it is used only at night. In addition, the optical low pass filter (OLPF) 21 performs a function of blocking infrared rays sensitively stimulating the image pickup device 33. By taking this image, the image quality of the image picked up by the imaging element 33 is further enhanced.

The operation of the monitoring board camera according to the present invention having the above-described configuration will be briefly described.

The above-described monitoring board camera power is transmitted via the motor 11, the lead screw 13 and the moving port 15. The transmitted power causes the lens support 17 to move from side to side.

In detail, referring to FIG. 1, the state in which the lens support 17 is moved to the right is a state in which the infrared transmission filter 19 is used, and is used at night. In addition, the state in which the lens support 17 is moved to the left side is a state in which the OLPF 21 is used, and thus is used during the day by blocking ultraviolet rays.

In addition, the lower lead screw 13 and the guide bar 23 are further used to guide the position of the lens support 17 such that the left and right movements are performed without unnecessary swing. In order to stably place the lens support 17 at a predetermined position, the position sensor 31 detects the horizontal movement guide portion 25 or a specific protrusion not shown, and transfers it to a predetermined controller. In this way, the driving of the motor 11 is interrupted.

3 is a view for explaining the operation of the monitoring board camera according to the present embodiment.

Referring to FIG. 3, power from the motor 11 is transmitted via the motor 11, the lead screw 13, and the moving tool 15, and eventually the lens support 17 is operated left and right.

The light transmitted to the imaging device 33 is changed by the operation of the lens support 17. This will be described in detail below.

In the daytime, only a light source with visible light is sufficient, and the image quality of the image captured by the unnecessary infrared rays is deteriorated, so that the OLPF 21 capable of blocking the infrared rays is positioned above the image pickup element 33. To this end, the lens support 17 is moved to the left.

In the case of nighttime, in view of the fact that visible light is not sufficient and infrared rays are irradiated irrespective of daytime or nighttime, an infrared transmission filter 19 capable of sufficiently transmitting infrared rays is placed on the aligned upper side of the imaging element 33. Position it. To this end, the lens support 17 is moved to the right.

FIG. 1 shows a state in which the infrared transmission filter 19 is arranged above the imaging device 33, and FIG. 3 shows a state in which the OLPF 21 is arranged above the imaging device 33. As shown in FIG.

In addition, the infrared transmission filter 19 and the OLPF 21 are positioned at the position where the lens supporter 17 and the OLPF 21 are correctly aligned in line with the image pickup device 33 so that the moved position of the lens supporter 17 is at the right and right positions. When placed, the position of the lens support 17 is sensed by the position sensor 31, so that the operation of the motor 11 is stopped.

Surveillance board camera according to the present invention of the above-described configuration is characterized in that it is possible to capture a subject at a certain distance during the day and night by a simple configuration, the low cost and reliable board camera by the idea of the present invention Implementation of can be achieved.

The present invention allows the separate filter and lens to be used during the day and night by a simple configuration driven mechanically, there is no difficulty in imaging day and night, there is an effect that can increase the reliability of the operation.

In addition, the present invention allows all the aggregates, such as lenses and the like, as well as the filters employed during the day and night, to be used separately during the day and night, so that the complicated structure required for the correction of chromatic aberration is not necessary, thereby reducing the manufacturing cost. There is a more effective effect.

Claims (3)

A lead screw extending from the motor and the drive side of the motor; A lens supporter which includes a moving tool formed integrally with the outer circumference of the lead screw and includes an infrared transmission filter and an optical low pass filter on both sides of the body moved left and right so that different filters are used during the day / night. ; And And a circuit board further formed below the lens support to form an image pickup device for capturing an image by light transmitted through the infrared transmission filter and the optical low pass filter. The method of claim 1, A horizontal movement guide part formed on the other side of the lens supporter opposite to one side on which the movement tool is formed; And The horizontal movement guide portion is placed on the outer periphery, the structure of the surveillance board camera, characterized in that it comprises a guide bar for reliably the left and right operation of the lens support. The method of claim 1, A base panel on which the lens support is fixed against horizontal movement; And And a position sensor fixed to the base panel to detect left and right movements of the lens support.