JP3355823B2 - Security monitoring system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a security monitoring system for detecting the presence of a suspicious person inside and outside a house or office and monitoring the behavior of the person.

[0002]

2. Description of the Related Art Conventionally, in the field of home security,
A video camera intercom is provided at a predetermined position outside the room, a monitor intercom is provided in the room, and image signals and audio signals are transmitted and received between the video camera intercom and the monitor interphone by wiring. In order to see what kind of person is coming when the chime rings, a security monitoring system that allows you to see the outside through a monitor without opening the door and staying indoors Widely used. In an office or the like, a security monitoring system is used in which a video camera is installed at a predetermined position in a room, and the indoor condition is monitored by a monitor installed in another room.

[0003]

However, in order to transmit an image signal and an audio signal from an intercom with a video camera installed outdoors or a video camera installed indoors to another intercom with monitors or monitors in another room. Wiring is used, and the length of the wiring is several meters. Therefore, wiring work requires a lot of work, and there is a problem that the installation of the security monitoring system is not easy. In addition, the cost of the security monitoring system is low. Making it difficult.
Also, the intercom with video camera or the video camera is fixed outdoors or indoors, and its camera angle is fixed in one direction, so there is no freedom in the shooting direction, and the area covered by the video camera is limited, There is also a security problem that it is possible that the person to be photographed may not be captured.

Accordingly, an object of the present invention is to wirelessly transmit and receive image signals and audio signals between an outdoor video camera intercom or an indoor video camera and another indoor monitor interphone or monitor. Accordingly, it is not necessary to perform wiring work for several meters as in the related art, and it is possible to provide an easy installation of the security monitoring system and a reduction in the price of the security monitoring system. Also, to improve the performance of the security surveillance system by grasping the direction of the person using the human body detection radar, adjusting the camera angle of the video camera to that direction, and constantly capturing the target person. It is.

[0005]

In order to solve the above-mentioned problems, the present invention is directed to a security system for security, which is provided at a predetermined position inside and outside a room, and displays images in arbitrary directions. an imaging means for capturing and transmission means for transmitting an image signal captured by the imaging means at a millimeter-wave receiving means for receiving an image signal transmitted in the millimeter wave is received by the receiving means Display means for projecting an image based on the image signal, and detecting indoor and outdoor persons.
Body sensing means and the person sensed by the body sensing means
Control means for controlling the photographing direction of the photographing means in the direction,
The human body sensing means is the entire area of the area to be scanned
Output a millimeter-wave transmission wave toward
Receives reflected waves and detects the phase difference between transmitted and received waves
Phase difference detection means, in a state where the person does not exist in advance
Phase difference storage means for detecting the phase difference and storing the phase difference;
And the phase difference stored in the phase difference storage means,
Detects a person from the phase difference detected by the phase difference detection means
It is characterized by doing.

[0006]

[0007]

[0008]

[0009]

According to the operation of the present invention, image signals taken from photographing means disposed at predetermined positions inside and outside the room are communicated by means of millimeter waves via transmitting means and receiving means, and these image signals are displayed. Reflect on the means . Further, the the human body sensing means having a function of sensing indoor and outdoor person, by providing a control means having a function of controlling the imaging direction of the direction the photographing means of the person sensed by the human body sensing means, the human body The photographing means is controlled in the direction sensed by the sensing means . Toward the shooting direction of the imaging means in a situation where not a person before things
A millimeter wave transmission wave is output, a reflected wave of the transmission wave is received, a phase difference between the transmission wave and the reception wave is obtained, and stored in a phase difference storage unit. Thereafter, the presence of a person is determined based on the value of the phase difference between the transmission wave and the reception wave from the human body sensing means and the phase difference acquired in advance .

[0010]

According to the effects of the present invention, it is not necessary to perform wiring work between the photographing means and the display means, and the installation of the security monitoring system can be facilitated and the price can be reduced . Ma
In addition, the angle of the photographing means can be adjusted in the direction in which the person exists, and the target person can be always captured, and the performance of the security monitoring system can be improved . Also,
The distance of a person can be measured, that is, the position of the person can be limited. Further, even a moving person can be reliably detected, and the performance of the security system can be improved . Further, by using the millimeter wave, when transmitting and receiving the image signal wirelessly, the frequency is high, so that the size and weight of the transmitting means can be reduced. Further, by using millimeter waves, it is possible to perform accurate image communication and accurate human detection with little interference from outside .

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to specific embodiments. FIG. 1 is an overall perspective view showing the configuration of a security monitoring system 10 according to the present invention. Here, an office is assumed as a target to which the security monitoring system 10 is applied. The security monitoring system 10 includes a video camera 1 having a function of capturing an object, a transmitting device 5 having a function of wirelessly transmitting an image captured by the video camera 1, and receiving an image signal transmitted from the transmitting device 5. Device 6 having a function of performing the following functions: a monitor 2 having a function of displaying an image signal received by the receiving device 6 on a display; and a person 4 having a transmitting unit and a receiving unit, which is to be photographed wirelessly. A human detection radar 3 to be captured, and a control device 7 (not shown) for outputting a camera drive signal for moving the camera angle of the video camera 1 in the direction of the person captured by the human detection radar 3
Consists of

In the present invention, the frequency band of the radar signal used in the human body sensing radar 3 and the frequency band of the image signal transmitted and received between the video camera 1 and the monitor 2 are limited in size and weight, and there is much interference. It does not use low-accuracy microwaves or light lacking in all-weather properties, has relatively little interference from outside, has good sensing accuracy,
The signal attenuation due to rain, fog, dust, smoke, etc. is small and the millimeter wave band (30 GHz to 300 GHz) that can be used in all weather
z) was used. To send image data, a few MHz
Since it is necessary to apply modulation of up to several tens of MHz, the carrier wave preferably has a frequency of several GHz to several tens GHz, and if the image signal is in the millimeter wave band, it is easy to send image data.

FIG. 2 is a block diagram showing the relationship between the components of the present invention having the above configuration. The human body sensing radar 3 transmits a millimeter wave as a transmission wave toward the entire area of the area to be scanned, receives the reflected wave, and sends the reflected wave to the control device 7. The control device 7 detects a phase difference between the transmitted wave and the reflected wave, and when the value of the phase difference has a deviation equal to or more than a predetermined value stored in the memory, the person 4 to be photographed is identified by the millimeter. The video camera 1 is determined to exist in the wave transmission direction, the direction in which the person 4 to be photographed in the scan target area exists is identified, and the video camera 1 is changed to change the camera angle of the video camera 1 in that direction.
Sends a camera drive signal to the camera.

Until then, the video camera 1 shoots at a predetermined camera angle and transmits the image signal
When the human body detecting radar 3 detects the person 4, a camera drive signal is sent from the control device 7 to the video camera 1, and the camera angle is changed in the direction of the person 4. Moved. The video camera 1 captures the person 4 and transmits an image signal of the person 4 via a transmitting device 5 as a millimeter wave. In the receiving device 6, the transmitting device 5
Receives the image signal transmitted from the video camera 1 from the video camera 1, sends the image data to the monitor 2, and projects the person 4 to be photographed on the display.

Even when the person 4 to be photographed moves out of the field of view of the video camera 1 due to the movement of the person 4 to be photographed, the human body sensing radar 3 is always in the scanning target area of the human body sensing radar 3. By capturing the target person 4 and outputting a camera drive signal to the video camera 1, the camera angle moves in the direction in which the person 4 has moved. The monitor 2 can always capture the target person 4 on the display.

FIG. 3 is a block diagram showing the configuration of the control device 7. As shown in FIG. The control device 7 includes a CPU 30 that performs the entire process.
1. ROM 302 in which a program is stored, RAM 303 in which data is stored, an input / output port 304 for exchanging signals with the outside, a display circuit 305 for displaying data on the monitor 2, and a human body sensing radar It comprises an identification circuit 306 that processes a transmission wave and a reception wave for sensing and a radar drive signal for driving a mechanism of the human body sensing radar 3.

When the human body sensing radar 3 scans the entire area within the scan target area, the identification circuit 306 determines that the phase difference between the transmitted wave and the received wave has a deviation larger than a predetermined value. It is determined that there is a person 4 to be photographed in the millimeter wave transmission direction, the direction in which the person 4 is located is determined, and the position data of the person 4 is input to the input / output port 30.
4 to the CPU 301. The CPU 301 having obtained the position data of the person 4 outputs a camera drive signal capable of changing the direction of the video camera 1 via the input / output port 304 to the video camera 1 based on the position data,
The camera angle of the video camera 1 can be adjusted to the direction of the person 4. The monitor 2 has a display circuit 30
Since the data of the control device 7 can be received from the device 5, not only the image from the video camera 1 but also other information from the control device 7, for example, information such as the orientation of the video camera 1 is displayed on the display. be able to.

FIG. 4 is a flowchart showing a series of processing steps for detecting the person 4 to be photographed in the control device 7. First, in step 110, it is determined whether there is a person 4 to be photographed. The processing in step 110 is performed when the value of the phase difference between the transmitted wave transmitted from the human body sensing radar 3 and the reflected wave has a deviation equal to or greater than a predetermined value.
It is determined that there is a person 4 to be photographed in the millimeter wave transmission direction of the above, and it is determined that the person 4 exists.
Transitions to. If it is determined that the person 4 does not exist, the process proceeds to step 120.

After it is determined in step 110 that there is no person 4 to be photographed in the millimeter wave transmission direction of the human body detecting radar 3 at the current time, in step 120, the human body detecting radar 3
Offset (increment) the position (direction) of. Subsequently, in step 130, the position of the human body sensing radar 3 is set to MAX.
It is determined whether or not the position of the human body detecting radar 3 is MAX. If the position of the human body detecting radar 3 is not MAX, the process proceeds to step 140. It is determined whether or not there is a person 4 to be.

If the position of the human body sensing radar 3 is determined to be MAX in step 130, the offset of the position of the human body sensing radar 3 is set to the opposite offset (the increment direction is reversed) in step 140, and the process proceeds to step 150. In step 150, the position information of the person 4 to be photographed is output to the monitor 2, and the process returns to step 110 to determine whether the person 4 is present again. If it is determined in step 110 that there is a person 4 to be photographed, the camera angle of the video camera 1 is changed in step 160 to the human body detecting radar 3.
, The process proceeds to step 150.

The scanning interval of the human body sensing radar 3 (the interval from the time when the scanning target area is completely scanned to the time when scanning is started again) may be performed periodically, but the human body sensing radar 3 is provided outside the room. In such a case, the human body detecting radar 3 may start scanning only when the intercom rings, in conjunction with the intercom. Further, when the human body detecting radar 3 is provided indoors, a sensor is provided on the door and linked with the sensor so that the scanning of the human body detecting radar 3 is started only when the door is opened and closed. Is also good.

In this embodiment, the case where the human body detecting radar 3 is used as the human body detecting means and the scanning is performed by radio waves has been described. However, the scanning may be performed using infrared rays as the human body detecting means.

Further, the present invention is not limited to the above-described embodiment, but may be applied to a case where a plurality of persons are always expected to exist in the scan target area, or a case where the scan target area has a partition or the like. If monitoring is not possible with one system due to its structure, a system provided with a plurality of video cameras 1, monitors 2, and human body detecting radars 3 may be provided as shown in FIG.

As shown in the above embodiment, the present invention
By transmitting and receiving image signals between the video camera 1 and the monitor 2 wirelessly, wiring work over several meters is not required, so that installation work of the security monitoring system 10 is prepared, and the security monitoring system 10 is prepared. Can be realized at a low price. In addition, by using the human body sensing radar 3, the person 4 to be photographed can be always captured and displayed on the monitor 2, thereby improving the performance of the security monitoring system 10.

[Brief description of the drawings]

FIG. 1 is an overall perspective view showing the configuration of the present invention.

FIG. 2 is a block diagram showing the relationship between components of the present invention.

FIG. 3 is a block diagram showing the relationship between components of the control device.

FIG. 4 is a flowchart showing processing contents in the control device.

FIG. 5 is an overall perspective view showing the configuration of the present invention when a plurality of persons are to be photographed.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Video camera 2 Monitor 3 Human body detection radar 4 Person to be imaged 5 Transmitting device 6 Receiving device 7 Control device 10 Security monitoring system

Continuation of the front page (56) References JP-A-54-157099 (JP, A) JP-A-53-110699 (JP, A) JP-A-52-104897 (JP, A) , U) Fully open 1988-92486 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) G08B 13/00-15/02 H04N 7/18

Claims (1)

(57) [Claims] 1. A security system for security, is disposed at a predetermined position of the indoor and the outdoor, mm and imaging means for capturing an arbitrary direction of the video, the image signal captured by said imaging means transmission means for transmitting at wave receiving means for receiving the image signal transmitted in the millimeter wave, and display means based on the image signal received by said receiving means, displaying an the image, room and Human body sensing means for sensing an outdoor person, and the photographing in the direction of the person sensed by the human body sensing means
Control means for controlling the photographing direction of the means , wherein the human body detecting means transmits millimeter waves to the entire area of the area to be scanned.
Outputs the transmitted wave and receives the reflected wave of the transmitted wave
Phase difference detection for detecting a phase difference between the transmission wave and the reception wave.
Output means, and detects the phase difference in a state where the person does not exist in advance.
And a phase difference storage means for storing the phase difference.
The phase difference stored in the phase difference storage means and the phase difference detection
Detecting the person from the phase difference detected by the output means
Crime prevention for the monitoring system that is characterized in that.