KR101194342B1 - Varifocal lens with mega-pixel auto-focus zoom cctv camera for high resolution video abbreviation for charge coupled and its auto-focus control method - Google Patents

Abstract

PURPOSE: An auto zoom monitoring camera for mega pixel high resolution with a variable focus lens and an auto focus control method thereof are provided to form an IP module in the monitoring camera, thereby connecting the monitoring camera to the Internet. CONSTITUTION: A variable focus lens unit(10) includes a zoom lens(11) and a focus lens(12). An image signal processing unit(20) includes an imaging sensor(21) for mega pixel and an image signal processing module(22). A main processor(32) of a zoom focus module unit(30) controls auto focus. A motor drive(34) of the zoom focus module unit operates a zoom motor(11a) and a focus motor(12a). A remote control unit(42) of an I/O(Input/Output) module unit(40) wirelessly manipulates a monitoring camera.

Description

Autofocus Zoom Surveillance Camera with Variable Focus Lens and High Focus Video Control {Varifocal Lens with mega-pixel auto-focus Zoom CCTV camera for high resolution video abbreviation for charge coupled and Its auto-focus control method}

The present invention relates to an autofocus zoom surveillance camera for megapixel high resolution imaging and a method of controlling the autofocus, each of which is equipped with a variable focus lens, and more particularly, an HD-SDI module for outputting a high quality image in an HD-SDI format. Variable focus that can be connected to the network for remote control or viewing of the surveillance camera, and to store the focus position value for the zoom position value in advance and move the focus lens automatically after moving the zoom lens to control the focus quickly. An autofocus zoom surveillance camera for megapixel high-resolution imaging with a lens and a method for controlling the autofocus thereof.

Generally, CCTV (Closed Circuit Television) system is installed and operated in various fields such as surveillance and management in places where many people visit and industrial facilities.

Recently, installations such as department stores, banks, exhibition halls, schools, and residential areas have been expanded and are expected to be expanded as part of securing safety from various crimes.

Such CCTV has recently been used IP surveillance cameras that can be connected to the Internet to operate or monitor the surveillance cameras from a distance, and high-resolution video of at least 720P (1280 X 720) or more so that the recorded video is output in high quality High-definition HD-SDI surveillance cameras for high resolution have been widely used.

The IP surveillance camera is a surveillance camera used for connecting to the wired or wireless Internet. The IP is an abbreviation of 'Internet Protocol' and is a protocol used to send data from one computer to another on the Internet.

IP surveillance camera is composed of surveillance camera module, decoder, video compression chip, CPU, network transmission chip, etc., and converts analog signal transmitted from surveillance camera module into digital by decoder and transmits through compression from compression chip. It is a surveillance camera that can watch the image over the Internet from a distance or to operate the operation of the surveillance camera.

In addition, the HD-SDI surveillance camera is a high-definition surveillance camera, and the HD-SDI is an abbreviation of 'High Definition Serial Digital Interface', which means a digital video transmission standard, and when a high resolution video of at least 720P (1280 X 720) is realized. It is advantageous to HD surveillance camera for HD digital broadcasting and surveillance camera using HD video format using HD-SDI format in broadcasting equipment.

However, the conventional surveillance camera as described above has a problem that the maintenance of the user is not only difficult due to the complicated structure of the variable focus lens, but also the man-hours are increased during manufacturing. There was a problem that takes a long time.

In addition, since the conventional surveillance camera has a structure for driving the focus motor after driving the zoom motor, there is a problem in that a time for searching for focus is delayed due to a separate driving operation.

The present invention was devised to solve the problems of the prior art as described above. The object of the present invention is to provide a compact stepping motor to simplify the structure of the variable focus lens and to convert the image of the surveillance camera into the HD-SDI format. Output to watch in high quality, and can be operated at a long distance with an IP module so that the surveillance camera is connected to the Internet, and the focus position data for the current position data of the zoom is stored in memory beforehand to perform auto focusing only by driving the zoom. The present invention provides an autofocus zoom surveillance camera for megapixel high resolution image capturing and a method of controlling the autofocus.

In order to achieve the above object, an autofocus zoom surveillance camera for megapixel high resolution image capturing with a variable focus lens according to the present invention includes a zoom lens 11 having a zoom motor 11a at an outer periphery, and the zoom lens 11. A variable focus lens unit 10 which is connected to the lens and comprises a focus lens 12 having a focus motor 12a on an outer circumference thereof; It is connected to the variable focus lens unit 10 and a megapixel image sensor device 21 for high resolution imaging, and a large-capacity image signal captured in high resolution connected to the image sensor device 21 is output, and the Internet A video signal processing unit 20 connected to the video signal processing module 22 for converting data to be input and output at a long distance; A data input unit 31 connected to the image signal processing unit 20 to receive image data and receiving an autofocus data signal on the Internet, and connected to the data input unit 31 and the variable focus lens unit 10 to auto A main processor 32 controlling a focus, a memory unit 33 connected to the main processor 32 to store a position value of a focus lens with respect to a position of a zoom lens, and a main processor 32 connected to the main processor 32. A zoom focus module unit 30 including a motor drive 34 for driving the motor 11a and the focus motor 12a; A manual operation unit 41 connected to the zoom focus module unit 30 to manually operate a lens drive of the surveillance camera 1, and a zoom operation module 1 wirelessly connected to the zoom focus module unit 30. Remote control unit 42 to operate, the input and output unit 43 is connected to the zoom focus module unit 30, the wired simply connected so that the surveillance camera 1 is remotely controlled, and the surveillance camera 1 Characterized in that consisting of the I / O module unit 40 consisting of a power supply unit 44 to which power is transmitted therein.

The control method of the autofocus system is a method of controlling the autofocus of an autofocus zoom surveillance camera equipped with a megafocal variable focus lens. The zoom motor 11a and the focus motor 12a when the first power is applied or the system is booted. An initial coordinate loading step of loading data for initial coordinates of the step S100; A zoom motor operation step (S200) of manipulating the coordinates of the zoom motor 11a by a user's request; A focus coordinate loading step (S300) of loading coordinate data of the focus motor 12a with respect to the coordinates of the zoom motor 11a from the memory unit 33 after the zoom motor 11a is operated; A focus motor operation step (S400) of loading data for a focus coordinate to drive the focus motor 12a; A focus discriminating step (S500) of the user visually determining the focus after the focus motor 12a is operated; And a system termination step (S600) of terminating the autofocus system when there is no abnormality after the user visually determines the focus.

As described above, the autofocus zoom surveillance camera for megapixel high resolution image capturing and the autofocus control according to the present invention have the following effects.

First, by providing an IP module inside the surveillance camera so that the surveillance camera is connected to the Internet network, the surveillance camera can be conveniently operated from a long distance,

Second, the HD-SDI module is provided inside the surveillance camera so that the video output of the surveillance camera is output in the HD-SDI format for high resolution. You can,

Third, the data of the focus motor is made into LUT (Look Up Table) and stored in the memory to quickly move the focus lens to match the position of the zoom lens, thereby reducing the driving time for the overall focusing search operation.

Fourth, by providing a stepping motor with a small size and accurate driving force on each lens outer periphery of the variable focus lens unit, the overall structure of the surveillance camera can be simplified and the variable focus lens unit can be accurately driven. ,

Fifth, if an error of focusing occurs, it can be manually adjusted to the correct coordinate value immediately, and the adjusted coordinate value is newly updated to the memory unit connected to the main processor so that it can be quickly corrected even if the focus is changed by the movement of the subject. It works.

1 is a block diagram showing an autofocus surveillance camera according to the present invention,
2 is a flowchart illustrating a control method of an autofocus system according to the present invention.
3 is a flowchart illustrating a focus discrimination step of a control method of an autofocus system according to the present invention.

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

As shown in FIG. 1, an autofocus zoom surveillance camera equipped with a variable focus lens according to the present invention includes a zoom lens 11 having a zoom motor 11a on an outer circumference thereof, and the zoom lens 11. A variable focus lens unit 10 which is connected to the lens and comprises a focus lens 12 having a focus motor 12a on an outer circumference thereof; It is connected to the variable focus lens unit 10 and a megapixel image sensor device 21 for high resolution imaging, and a large-capacity image signal captured in high resolution connected to the image sensor device 21 is output, and the Internet A video signal processing unit 20 connected to the video signal processing module 22 for converting data to be input and output at a long distance; A data input unit 31 connected to the image signal processing unit 20 to receive image data and receiving an autofocus data signal on the Internet, and connected to the data input unit 31 and the variable focus lens unit 10 to auto A main processor 32 controlling a focus, a memory unit 33 connected to the main processor 32 to store a position value of a focus lens with respect to a position of a zoom lens, and a main processor 32 connected to the main processor 32. A zoom focus module unit 30 including a motor drive 34 for driving the motor 11a and the focus motor 12a; A manual operation unit 41 connected to the zoom focus module unit 30 to manually operate a lens drive of the surveillance camera 1, and a zoom operation module 1 wirelessly connected to the zoom focus module unit 30. Remote control unit 42 to operate, the input and output unit 43 is connected to the zoom focus module unit 30, the wired simply connected so that the surveillance camera 1 is remotely controlled, and the surveillance camera 1 It is composed of; I / O module unit 40 consisting of a power supply unit 44 to which power is transferred therein.

On the other hand, the zoom motor (11a) and the focus motor (12a) of the variable focus lens unit 10 is provided with a plurality of gears inside the stepping motor (not shown) that is precisely operated and easy to manufacture in a small size It is preferably formed by

In addition, the data input unit 31 is preferably formed of an RS-485 31a connected to the image signal processing unit 20 and capable of bidirectional communication.

The video signal processing module 22 is provided with a high definition serial digital interface (HD-SDI) module 22a for converting and outputting a high resolution video signal captured by the imaging sensor device 21 into an HD-SDI format. .

In addition, the video signal processing module 22 compresses the high resolution video signal captured by the megapixel image sensor device 21 and transmits it to the Internet, and receives the digital data signal transmitted from a remote location to monitor the camera 1. IP (Internet Protocol) module 22b is provided to control the function of the.

The imaging sensor device 21 is formed of a megapixel CCD 21a and a CMOS imaging sensor 21b.

The input / output unit 43 is connected to the HD-SDI module 22 and the BNC (Bayonet-Neil-Concelman) connector 43a to which the coaxial cable C is connected to output the converted HD-SDI signal to the outside. It is composed of an RJ-45 connector (43b) is connected to the IP module 23 is connected to the LAN cable (L) so that data is transmitted and received over the Internet.

On the other hand, the manual control unit 41 is a zoom key (not shown) for driving the zoom motor 11a of the variable focus lens unit 10 clockwise or counterclockwise, and the focus motor 12a clockwise or It is also preferable to provide a focus key (not shown) for driving counterclockwise.

Hereinafter, a method of controlling autofocus of an autofocus zoom surveillance camera equipped with a variable focus lens for megapixel will be described in detail with reference to FIG. 2.

From the initial coordinate loading step (S100) of loading the data on the initial coordinates of the zoom motor (11a) and the focus motor (12a) in the main processor 32 at the first power-up or system booting as shown in FIG. Begins.

Subsequently, a zoom motor operation step (S200) of operating the zoom motor 11a by the user's request to drive the zoom lens 11 in the optical axis direction is performed.

On the other hand, the user's request by operating the zoom key (not shown) through the manual control unit 41 configured in the I / O module unit 40 or the remote control unit 42 and the input / output unit 43 connected to a remote place The zoom motor 11 may be driven by a digital data signal transmitted from a remote place by driving the zoom motor 11a or via an IP (Internet Protocol) module 22b of the image signal processing module 22 included in the image signal processing unit 20. Drive 11a).

Thereafter, the focus position loading step (S300) of loading position data of the focus motor 12a with respect to the position of the zoom motor 11a from the memory unit 33 after the zoom motor 11a is operated is performed. do.

Here, the staff provided in the variable focus lens unit 10 by loading the position data of the focus motor 12a for the position of the current zoom motor 11a in the main processor 32 connected to the motor drive 34. The ping motor can be driven.

Then, the focus motor operation step (S400) of loading the data for the focus position to drive the focus motor 12a; is performed.

Thus, the focus motor 12a may be driven to quickly focus the subject to be photographed only by a user's request for moving the zoom motor 11a to a predetermined position value.

Subsequently, after the focus motor 12a is operated, a focus determination step S500 of visually determining the focus by the user is performed.

Thereafter, when the user visually determines the focus and there is no abnormality, the system end step (S600) ends in the autofocus system.

In this way, the focus motor position data is stored in the memory unit 33 according to the position data of the zoom motor in advance, so that the focus motor can be quickly moved after the zoom motor is moved, thereby reducing the autofocusing time.

Here, in the focus determination step S500, as shown in FIG. 3, when the user determines the focus and there is an error, a manual operation step S510 for manually manipulating the coordinates of the focus is performed.

On the other hand, the manual operation step (S510) for manually operating is also performed in the same operation as the request of the user as described above.

Thereafter, when the focus is not abnormal after the manual operation step S510, a coordinate update step S520 of updating the position value of the current focus motor 12a to the memory unit 33 is performed.

After the coordinate update step (S520), the system ends the update step (S530) of terminating the system.

Thus, if the position data of the focus motor with respect to the position data of the zoom motor does not coincide due to the displacement of the image, the position of the new focus motor is manually adjusted and the position data of the focus motor is updated in the memory unit 33 so that the position of the image may be changed. Can be corrected quickly and accurately.

The operation of the autofocus zoom surveillance camera for megapixel high-resolution imaging with a variable focus lens according to the present invention having the above configuration is as follows.

In the autofocus zoom surveillance camera for megapixel high resolution imaging according to the present invention, an image projected by the variable focus lens unit 10 is converted into an image signal by the imaging sensor device 21 as shown in FIG. By connecting the HD-SDI module 22a to the image sensor device 21 so that the video signal is output in high quality, the video signal is converted into a high quality HD-SDI format through the HD-SDI module 22a. The viewing user can view the captured image in high quality.

In addition, by the IP module 22b connected to the image sensor device 21, the video signal received through the image sensor device 21 can be compressed, and the compressed video signal can be transmitted to the Internet. The image captured by the variable focus lens unit 10 may be directly checked.

In addition, the data input unit 31 connected to the IP module 22b is formed as an RS-485 31a unit capable of bidirectional communication, so that it is possible to transmit a video signal to a remote site and to receive a data signal transmitted from a remote site.

On the other hand, due to the manual operation unit 41 provided in the I / O module unit 40, the user directly manipulates the function of the surveillance camera 1, or the remote control provided in the I / O module unit 40 The unit 42 allows the user to wirelessly adjust the function of the surveillance camera 1 regardless of the place where the surveillance camera 1 is installed.

Here, adjusting the function of the surveillance camera 1 is performed by driving the zoom lens 11 and the focus lens 12 of the variable focus lens unit 10 included in the surveillance camera 1 in the optical axis direction. Says to adjust the focus.

On the other hand, the memory unit 33 provided in the zoom focus module unit 30 loads the coordinate values of the focus motor 12a with respect to the coordinate values of the zoom motor 11a stored in the main processor 32 to change the variable. The focus motor 12a is driven to move the focus lens 12 of the focus lens unit 10 in the optical axis direction.

As a result, the focus motor 12a is driven only by the driving of the zoom motor 11a, which eliminates the process of exhausting the focus search, thereby simplifying the configuration of the system and driving time.

Here, the memory unit 33 connected to the main processor 32 is a storage device, and is provided with EEPROM, SDRAM, NAND flash, and the like to store and update data under the control of the main processor 32 according to the purpose. do.

On the other hand, the user visually determines the image shifted to the position value of the pre-stored focus motor 12a and if there is an error, the user manually drives the focus motor 12a and stores the existing focus motor 12a stored in the memory unit 33. By updating the coordinate value of), it is possible to immediately modify the focus to suit the shooting situation.

As described above, the autofocus zoom surveillance camera for megapixel high-resolution imaging and the method of controlling the autofocus provided with the variable focus lens according to the present invention can perform the autofocus function in a short time at the same time as the zoom in / out, and the basic After manually moving the stored focus position value, it updates according to the situation and provides the advantage of making a fast and precise autofocus surveillance camera.

The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by those skilled in the art without departing from the gist of the present invention as claimed in the claims. Of course, such changes will fall within the scope of the claims.

Description of the Related Art
1: surveillance camera 10: variable focus lens unit
11: zoom lens 11a: zoom motor
12: focus lens 12a: focus motor
20: image signal processor 21: image sensor device
21a: Megapixel CCD 21b: CMOS Image Sensor
22: video signal processing module 22a: HD-SDI module
22b: IP module 30: zoom focus module
31: data input part 31a: RS-458
32: main processor 33: memory
34: motor drive 40: I / O module
41: manual operation unit 42: remote control unit
43: I / O part 43a: BNC connector
43b: RJ-45 connector 44: power supply
C: Coaxial Cable L: LAN Cable

Claims (7)

The variable focus lens unit 10 includes a zoom lens 11 having a zoom motor 11a at its outer circumference and a focus lens 12 connected to the zoom lens 11 and having a focus motor 12a at its outer circumference. Wow;
It is connected to the variable focus lens unit 10 and a megapixel image sensor device 21 for high resolution imaging, and a large-capacity image signal captured in high resolution connected to the image sensor device 21 is output, and the Internet A video signal processing unit 20 connected to the video signal processing module 22 for converting data to be input and output at a long distance;
A data input unit 31 connected to the image signal processing unit 20 to receive image data and receiving an autofocus data signal on the Internet, and connected to the data input unit 31 and the variable focus lens unit 10 to auto A main processor 32 controlling a focus, a memory unit 33 connected to the main processor 32 to store a position value of a focus lens with respect to a position of a zoom lens, and a main processor 32 connected to the main processor 32. A zoom focus module unit 30 including a motor drive 34 for driving the motor 11a and the focus motor 12a;
A manual operation unit 41 connected to the zoom focus module unit 30 to manually operate a lens drive of the surveillance camera 1, and a zoom operation module 1 wirelessly connected to the zoom focus module unit 30. Remote control unit 42 to operate, the input and output unit 43 is connected to the zoom focus module unit 30, the wired simply connected so that the surveillance camera 1 is remotely controlled, and the surveillance camera 1 I / O module unit 40 consisting of a power supply unit 44 to which the power is transferred therein. The method of claim 1,
The video signal processing module 22 is formed of an HD-SDI (High Definition Serial Digital Interface) module 22a for converting and outputting a high resolution video signal captured by the imaging sensor device 21 into an HD-SDI format. Alternatively, IP (Internet Protocol) for compressing a high resolution image signal captured by the megapixel image sensor device 21 and transmitting it to the Internet, and receiving a digital data signal transmitted from a remote location to control the function of the surveillance camera 1. Autofocus zoom surveillance camera for megapixel high-resolution imaging with a variable focus lens, characterized in that formed by a module (22b). delete The method of claim 1,
The imaging sensor device 21 is a megapixel high-definition image capture autofocus camera with a variable focus lens, characterized in that formed by the megapixel CCD (21a) and CMOS image sensor (21b). The method of claim 2,
The input / output unit 43 is connected to the HD-SDI module 22 and the BNC (Bayonet-Neil-Concelman) connector 43a to which the coaxial cable C is connected to output the converted HD-SDI signal to the outside. And a RJ-45 connector 43b connected to the IP module 23 and connected to a LAN cable L so that data can be transmitted and received over the Internet. Focus zoom surveillance camera. A method of controlling an autofocus zoom surveillance camera for megapixel high-resolution imaging, comprising a variable focus lens according to any one of claims 1, 2, 4, and 5,
An initial coordinate loading step (S100) of loading data on initial coordinates of the zoom motor 11a and the focus motor 12a at the time of initial power-up or system booting;
A zoom motor operation step (S200) of manipulating the coordinates of the zoom motor 11a by a user's request;
A focus coordinate loading step (S300) of loading coordinate data of the focus motor 12a with respect to the coordinates of the zoom motor 11a after the zoom motor 11a is operated in the memory unit 33 storing the position value;
A focus motor operation step (S400) of loading data for a focus coordinate to drive the focus motor 12a;
A focus discriminating step (S500) of the user visually determining the focus after the focus motor 12a is operated;
And a system termination step (S600) of terminating the autofocus system when a user visually determines the focus and there is no abnormality. The autofocus control method of a surveillance camera having a variable focus lens according to claim 1, wherein the autofocus system is terminated. The method according to claim 6,
If there is an error in the focus judging step (S500) when the user determines the focus, a manual operation step (S510) of manually operating the coordinates of the focus is performed, and the focus does not have an error after the manual operation step (S510). A coordinate update step (S520) of updating a coordinate value of the current focus motor 12a to the memory unit 33 is performed, and an update termination step (S530) of terminating the system after the coordinate update step (S520); Autofocus control method for a surveillance camera equipped with a variable focus lens, characterized in that configured.

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