KR20010005010A - The picture data saving apparatus of security system - Google Patents

Abstract

PURPOSE: A device for storing image information of a security system is provided so that a user can easily watch the image information through a computer screen, by converting image signals into digital data and recording the digital data. CONSTITUTION: An adjacent sensor(10) outputs a sensing signal when a visitor approaches a camera(15). The first low-pass filter(13) and a comparator(14) compare the sensing signal with a reference voltage, and output a logic signal. The camera(15) is used to photograph the visitor. The second low-pass filter(16) and a second amp(17) filter the image signal photographed by the camera(15). An A/D converter(18) converts the image signal from the second amp(17) into a digital signal. A microcomputer(20) maintains the camera(15) to be turned on according to the logic signal from the comparator(14), temporarily stores the digital image signal from the A/D converter(18) in a memory(19), and outputs the image signal of one screen. A still image codec(21) records a real time on the image signal of one screen in the OSD type, and encodes and compresses the image signal. A data storing unit(25) stores the encoded image data. Accordingly, a user can conveniently watch the recorded image information through a computer screen.

Description

Image information saving apparatus of surveillance system

The present invention digitalizes one still image and real-time information from an image taken by a CD camera and stores it in a data storage device such as a diskette, so that the stored image information can be viewed at any time through a computer. Relates to a storage device.

Humans have enjoyed various forms of technology benefits as science and technology have advanced and used them to accumulate wealth. As these wealth accumulates, various kinds of theft and industrial spy appear frequently, and each company or family has a variety of security devices to prevent theft. Always monitor the buildings you want to maintain.

In general, a security device that is widely used is to install a camera on the door to capture the visitor and output the image to the monitor for the user to check, and at the same time to store it in the VSI.

1 shows a conventional security device, which includes a button 1 switched by a visitor to send a call signal, and an image photographed by the camera 2 by operating the camera 2 according to the input of the call signal. And a microcomputer 3 which displays the information on the monitor 5 and controls the VSI 6 to record the image information according to the input signal of the function button 4.

The operation of the security device configured as described above is as follows.

First, when the visitor switches the button 1, the microcomputer 3 recognizes this and turns on the power of the camera 2 to control the camera 2 to photograph the visitor, and to display the image information photographed and output from the camera. The image information is transmitted to the monitor 5 according to a control signal input by the user through the function button 4. The monitor 5 displays the image information outputted from the microcomputer and input, and in VSI, the image information transmitted from the microcomputer 3 is recorded on the video tape.

However, in the conventional security device as described above, since the visitor is simply displayed on the monitor 5, the photographed image information is likely to be volatilized, and even if the image information is recorded on the video tape using VSI, the user often displays the image information. In order to confirm, there was a hassle of reconstructing the recorded video tape and then replaying it to check the image information while keeping the portion where the image information was not recorded so as to record the next event again.

An object of the present invention for solving the above problems is to convert the image signal photographed from the CD camera to be controlled by the microcomputer according to the visitor detection signal of the proximity sensor into a digital data form to record in a data storage device such as a floppy diskette The present invention provides an image information storage device of a surveillance system that enables a user to conveniently view recorded image information through a computer screen.

1 is a block diagram of a conventional security device,

2 is a block diagram of an image information storage device of a surveillance system according to the present invention;

3 is an operation flowchart of an image information storage device of a surveillance system according to the present invention;

<Code Description of Main Parts of Drawing>

10: proximity sensor 11: signal generator

12, 17: amplifier 13, 16: low pass filter

14: Comparator 15: Camera

18: A / D converter 19: Memory

20: micom 21: still picture codec

22: RTC (Real Time Clock) 23: Interface

24: OS generator 25: Data storage device

26: Roman

The image information storage device of the surveillance system of the present invention for achieving the above object is a proximity sensor for outputting a detection signal when a visitor approaches within a certain distance, and generates and amplifies a predetermined waveform signal under the control of the microcomputer to output to the proximity sensor. A signal generator and a first amplifier, a first low pass filter for low-passing the detection signal of the proximity sensor, a comparator for outputting a logic signal by comparing the low-pass detection signal to a reference voltage, and controlling the microcomputer. A camera for photographing the visitor, a second low pass filter and a second amplifier for low pass and amplifying the video signal photographed by the camera, and converting the analog video signal output from the second amplifier into a digital signal An A / D converter for outputting and a control signal according to a logic signal of the comparator to turn on the camera and to convert the A / D A microcomputer that temporarily stores the digital video signal outputted from the device in a memory and outputs a video signal of one screen among the temporarily stored video signals, and records the real time output from the RTC to an image signal of one screen output from the micom in an OS format. And a still picture codec for encoding, compressing and outputting the real-time recorded video signal, an interface for transmitting the video data output from the codec to a data storage device, and a data storage device for storing the video data. It is done.

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

2 is a block diagram of an image information storage device of the surveillance system of the present invention. As shown in the drawing, the microcomputer 20 includes a proximity sensor 10 that detects that a visitor approaches a predetermined distance and outputs a detection signal, and a signal that generates a predetermined waveform signal to the proximity sensor under the control of the microcomputer. A generator 11 and an amplifier 12, a first low pass filter 13 for low-passing the output signal of the proximity sensor, and a signal from the proximity sensor are compared to a reference voltage to output a logic signal to the microcomputer. Comparator 14 and resistors R1 and R2 for applying a bias voltage to the comparator are connected.

In addition, the microcomputer 20 is operated by a control signal of the microcomputer to receive a visitor's CD camera 15, and the second low pass filter 16 for low-passing the video signal photographed from the CD camera. And an amplifier 17 for amplifying the video signal output from the low pass filter, an A / D converter 18 for converting the analog video signal amplified from the amplifier into a digital signal, and the A / D converter. A memory 19 for temporarily storing the digital video signal under control of the microcomputer and a real time from the RTC 22 in a still image of one screen among the image signals of the memory output by the microcomputer, A still picture codec 21 for encoding and compressing the still picture signal recorded in real time, and an interface for transmitting a code signal from the still picture codec to the data storage device 25; 23 and a data storage device 25 for storing code signals from the interface are connected, and a ROM 26 having a processing program is connected to the microcomputer.

The still picture codec 21 includes a JPEG for compressing a still picture, and the data storage device 25 may be configured as a floppy diskette.

Looking at the operation of the device of the present invention configured as described above are as follows.

First, only the minimum power for detecting the visitor is applied to the image information storage device of the surveillance system by the system initialization, and the signal generator 11 and the first amplifier 12 are controlled by the microcomputer 20 by a predetermined waveform signal. Is output to the proximity sensor 10. When the visitor approaches within a certain distance, the proximity sensor 10 recognizes this and outputs a detection signal, which is low-passed by the first low pass filter 13. The comparator 14 outputs a logic signal by comparing the low-pass detected signal with a reference voltage. The microcomputer 20 operates the CD camera by turning on the power of the system according to the input of the logic signal.

The CD camera 15 is operated according to the control signal of the microcomputer to capture the approaching visitor, and the video signal captured by the CD camera is transmitted through the second low pass filter 16 and the second amplifier 17. Low pass and amplified output. The A / D converter 18 converts and outputs the analog video signal amplified and output from the second amplifier 17 into a digital video signal, and inputs the digital video signal in a microcomputer to be temporarily stored in the memory 18. . The microcomputer controls the RTC 22 to output a real time information while simultaneously outputting a video signal of one screen among the video signals temporarily stored in the memory 18.

The still picture codec 21 records the real time from the RTC 22 in an OSD format on an image signal output from the microcomputer by the OSD generator 24 and codes the image signal recorded with the real time. It is compressed and output to the data storage device 25 through the interface 23, and the data storage device 25 stores the coded data. The image information thus stored can be browsed through a computer at any time. The image information storage device of the surveillance system may install a CD camera at the entrance and the device body may be installed inside the building or mounted behind the camera.

3 is an operation flowchart of an image information storage device of a surveillance system, which includes initializing a system and determining whether a visitor is detected and turning on a system and operating a CD camera when a visitor is detected in the determining step. And converting the analog video signal photographed by the CD camera into a digital signal, recording the real time in an OSD format to the video signal of one screen, and encoding the video signal of the screen on which the real time is recorded, and storing the data. Determining whether the memory of the device is full, and in the case of a pool, sets the memory area to be stored as the memory area of the storage data of the highest priority, and overwrites the memory area to be stored if the pool is not full (K (= K + 1). ) To save the data, and count the set data storage time with a counter (not shown) If liver determines whether or not reached the set time is reached a step of turning off the system power and return to system initialization and visitor detection step repeatedly performing the steps:

K denotes a memory area that was stored last, and the data storage time may be arbitrarily set according to the number of accesses of the visitor.

In addition, when a floppy diskette is used, the data storage device has a capacity of 1.44 Mbytes and a still image on a screen occupies about 100 Kbytes. Therefore, about 10 visitor screens can be stored on a single floppy diskette.

As described above, the image information storage device of the surveillance system of the present invention recognizes a visitor's approach, captures the image information, converts the captured image information into digital data, and records the image information in real time on a data storage device such as a floppy diskette. The image information can be conveniently viewed through a computer screen, so that it is possible to check at any time when a person visits.

Claims (1)

A security device for monitoring a visitor using a CD camera, comprising: a proximity sensor (10) outputting a detection signal when a visitor approaches a predetermined distance, and generates and amplifies a predetermined waveform signal under the control of a microcomputer to generate and amplify the proximity sensor; The signal generator 11 and the first amplifier 12 to output the signal, the first low pass filter 13 for low-passing the detection signal of the proximity sensor, and the low-pass detection signal compared to the reference voltage to the logic A comparator 14 for outputting a signal, a camera 15 that is turned on under the control of a microcomputer, and photographs a visitor, and a second low pass filter 16 for lowpassing and amplifying the video signal captured by the camera; A second amplifier 17, an A / D converter 18 for converting an analog video signal output from the second amplifier into a digital signal, and outputting a control signal according to a logic signal of the comparator; And a microcomputer 20 which temporarily stores the digital video signal output from the A / D converter in the memory 19 and outputs a video signal of one screen among the temporarily stored video signals, and a video signal of one screen output from the micom. A still picture codec 21 for recording the real time output from the RTC 22 in an OSD format and encoding and compressing the real time recorded video signal, and sending the image data output from the codec to a data storage device. And an interface (23) and a data storage device (25) for storing the image data.