JPH09135312A - Home security system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To confirm an abnormal state by respectively installing sensors and radio cameras in a large number of zones, to which multicodes are allocated, to be monitored, sensing abnormality through the sensors together with the multicode and operating the corresponding radio camera, based on this multicode. SOLUTION: This system is provided with sensor parts 1a, 1b...1n installed in a large number of monitor zones so as to sense abnormality in security and safety and to sends a sensing signal together with the zone code allocated to that monitor zone, a large number of camera parts 2a, 2b...2n installed in the monitor zones of these sensor parts so as to photograph these monitor zones while receiving operation control signals and to transmit a video signal through radio together with the zone code allocated to that monitor zone, main body part 3 for receiving the zone codes and sensing signals sent from the sensor parts, decoding these zone codes, sending the operation control signal while specifying any camera part, and receiving the video signals photographed by the camera parts 2a, 2b...2n, and monitor 4 for receiving and displaying the video signals from this main body part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a home security system, and more particularly to a home security system including a wireless camera capable of monitoring an area where a sensor is installed with a camera.

[0002]

2. Description of the Related Art Generally, a home security system is composed of a large number of sensors provided in an area requiring monitoring and a main body provided in a room. The sensors are used for fire, intruders from outside, gas leaks, etc. On the other hand, the main body section receives the abnormality detection signal from the sensor and performs control operations such as emergency shutoff of gas, output of an outside intruder alarm, and output of a fire alarm.

Conventionally, a home security system of this kind is known, for example, as shown in FIG.
In this system (Japanese Patent Laying-Open No. 6-78310), a large number of cameras are connected to the main body by wire and switching is performed in the main body to monitor the occurrence of an abnormal state in each camera. That is, in the home security system shown in FIG. 5, the television receiver 52 provided in the room and the remote control means 5 for remotely operating the television receiver 52.
1, a camera 54, which is provided at the entrance and which inputs a video signal to the image receiver 52, and an intercom 53 which inputs and outputs a voice signal.

The remote control means 51 is provided with an intercom switching button 513, a microphone 511 and a microphone button (not shown) in addition to a normal button such as a TV channel selection button. The image captured by the camera 54 at the entrance and the sound from the microphone 532 of the intercom 53 are respectively displayed at the C of the television receiver 52.
An interphone selection signal for instructing to display on RT524 and reproducing to speaker 525 is output. The various control signals including the intercom selection signal from the remote control means 51 and the audio signal from the microphone 511 are converted into infrared signals by the built-in infrared converter 512 and output to the television receiver 52.

The television receiver 52 includes a receiver 521, an infrared / audio signal converter 522, a signal changeover switch 523,
It has a CRT 524 and a speaker 525. Receiver 521
Receives the infrared signal transmitted from the remote control means 51. The infrared / audio signal converter 522 converts the voice component in the infrared signal received by the receiver 521 into an electric audio signal and outputs it to the signal changeover switch 523, and also includes the interphone selection signal in the infrared signal. Various control signals are converted into electrical signals and output to the signal changeover switch 523. When the intercom selection signal is not received, the signal changeover switch 523 sends the video signal and the audio signal of the television broadcasting signal to the CRT 524 and the speaker 525, respectively. The video signal representing the generated image is output to the CRT 524, and the audio signal input to the microphone 532 is output to the speaker 525.

[0006]

However, in the above conventional home security system, the intercom 53 at the front door is used.
Further, since the camera 54 and the television receiver 52 in the room are connected by wire, there is a problem that a signal transmission cable for connection is required. Also, as mentioned earlier, if sensors and cameras are installed in many areas and centralized monitoring of these areas is performed by the main body of the room, the wiring for connection becomes enormous and wired management is complicated. Therefore, there is a problem that installation and maintenance of the system require a great deal of cost.

Therefore, in order to solve the above problem, an object of the present invention is to install a sensor and a wireless camera in each of a number of areas to be monitored to which a multi-code is assigned, and to detect an abnormality together with the multi-code by the sensor. Based on this, it is to provide a home security system that operates a corresponding wireless camera to confirm an abnormal state.

[0008]

In order to achieve the above object, the home security system according to claim 1 comprises:
A large number of sensor units installed in a large number of monitoring areas to detect security and safety abnormalities, and send out detection signals together with area codes assigned to the monitoring areas, and installed in the monitoring areas of the sensor sections to control operation. A large number of camera units that receive a signal to photograph the surveillance area and wirelessly transmit a video signal together with an area code assigned to the surveillance area,
It receives the area code and the sensing signal sent from the sensor section, decodes the area code, specifies the camera section installed in the monitoring area, sends the operation control signal, and shoots with the camera section. And a monitor for receiving the video signal from the main body and displaying the video signal.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the illustrated embodiments. FIG. 1 is a block diagram showing an example of the overall configuration of a home security system according to the present invention. This home security system has sensors 1a, 1b, ..., 1n installed in a number of areas to be monitored.
And the cameras 2 installed respectively corresponding to these sensors
, 2n, a main body 3 that wirelessly communicates with the sensor and the camera, and a monitor 4 that displays a video signal from the main body 3.

The plurality of sensors 1a, 1b, ..., 1n detect an abnormal state of each monitored area and wirelessly output a sensing signal together with an area code assigned to the monitored area. The plurality of cameras 2a, 2b, ..., 2n receive operation signals, photograph the surveillance area, and wirelessly output the video signals. The main body 3 receives the sensing signal including the area code from the sensors 1a, 1b, ..., 1n and decodes it, and the camera corresponding to the area code decoded among the cameras 2a, 2b, ..., 2n. An operation control signal is output to and is operated, and a video signal from this camera is received. The monitor 4 receives the video signal from the main body 3 and displays the state of the surveillance area photographed by the camera.

FIG. 2 shows the sensors 1a, 1b, ..., According to the present invention.
It is a block diagram which shows the structure of 1n. This sensor 1a, 1
b, ..., 1n are the sensor 21 and the data coding unit 22.
A modulator 23, a high frequency amplifier 24, and an antenna 25.
Consists of The sensor 21 is installed in a weak security area or an area where an accident is likely to occur. For example, an anti-theft sensor provided on a window to prevent theft, an intrusion detection provided on a fence or a fence to detect an intrusion of an outsider. Examples of the sensor include a gas sensor installed in a kitchen or a room to detect a leak of city gas.
When the sensing signal is input from the sensor 21, the data coding unit 22 synthesizes the area code indicating the place where the sensor 21 is installed, the unique code, and the information code indicating the abnormal state, and the synthesized result is obtained. Output as data. In addition, the modulator 23 includes a local oscillator 23b.
And a mixer 23a that modulates a high frequency (carrier wave) input from the local oscillator 23b with a data string input from the data coding unit 22. Further, the high frequency amplifying section 24 amplifies the signal from the mixer 23a and outputs it to the antenna 25, and the antenna 25 radiates this signal into the air and transmits it to the main body section 3 of the home security system.

FIG. 3 shows cameras 2a, 2b, ..., According to the present invention.
It is a block diagram which shows the structure of 2n. This camera 2a, 2
2n are provided with two high-frequency amplifiers 31a and 31b and a band-pass filter 31b, and a high-frequency amplifier 3 that amplifies the signal received by the antenna 30 and improves the sensitivity of the received signal.
1, a demodulation unit 32 that demodulates the high-frequency signal input from the high-frequency amplification unit 31 into a baseband signal, a baseband amplifier 33 that amplifies the baseband signal input from the demodulation unit 32, and the amplifier 33 A decoder 34 that decodes the input baseband signal, a camera drive unit 35 that receives the data decoded by the decoder 34 and drives a camera 37, and sensors 1a, 1b,
..., a camera 37 that is installed corresponding to 1n and shoots the area and outputs the video signal, and a high-frequency modulator 38 that modulates a high-frequency signal (carrier wave) with the video signal input from the camera 37, A high frequency amplifier 3 for amplifying a high frequency signal input from the modulator 38 and outputting the amplified high frequency signal to the antenna 30.
9 is provided.

FIG. 4 is a block diagram showing the structure of the main body 3 according to the present invention. The main body 3 includes band-pass filters 41a and 41c and high-frequency amplifiers 41b and 41d, and a receiving unit 41 that amplifies a received signal to improve selectivity with respect to an adjacent channel, and a high-frequency signal input from the receiving unit 41. A demodulation unit 42 that demodulates the signal into a baseband signal, a baseband amplification unit 43 that amplifies the baseband signal input from the demodulation unit 42, and a decoder 44 that decodes the signal input from the baseband amplification unit 43. And a microprocessor 45 which receives the digital signal of the decoder 44 and performs a control operation, and the microprocessor 45.
Data coding section 46 for coding the data to be transmitted according to the control signal, and this data coding section 4
Modulator 4 that modulates the signal input from 6 into a high-frequency signal
7, a transmitter 48 for amplifying and transmitting the high frequency modulated signal input from the modulator 47, and a control signal from the microprocessor 45 to operate the camera 2a,
, 2n (see FIG. 1), a television tuner 49 for receiving the composite signal, and a video signal detector for detecting the composite signal input from the tuner 49 by the control signal of the microprocessor 45. And 50.

The home security system having the above configuration is
It works as follows. A large number of sensors 1a, 1b, ..., 1n and cameras 2a, 2b, ..., installed in the surveillance area shown in FIG.
2n, for example "00" in the entrance area, "01" in the window area, "in the kitchen"
Assign each area code such as 10 ", ...
When a sensing signal is output from one of the sensors (for example, the sensor 1b), the sensing signal is output by the sensor 1b of FIG.
The data coding unit 22 shown in FIG. 2 encodes the area code set as described above and inputs the code to the modulation unit 23. The modulator 23 mixes the input area code data with the high frequency signal oscillated by the internal local oscillator 23b by the mixer 23a, and modulates the high frequency signal with the area code data. The modulated high frequency signal is amplified by the high frequency amplifier 24, radiated into the air through the antenna 25, and transmitted to the main body 3.

The high frequency signals transmitted from the sensors 1a, 1b, ..., 1n are received by the receiving section 41 via the antenna 40 of the main body section 3 shown in FIG. The receiver 41 amplifies and filters the received high frequency signal to improve the sensitivity of the signal and the selectivity of the adjacent channel. Demodulation unit 42
Is mixed with the frequency oscillated by the local oscillator 42b by the mixer 42a and demodulated into a baseband signal by mixing the high frequency signal whose sensitivity is improved by the receiver 41. Next, the baseband signal from the demodulation unit 42 is amplified by the baseband amplification unit 43 and input to the decoder 44, and the decoder 44 decodes this baseband signal, decodes it into the original signal, and outputs it. Then, the microprocessor 45 receiving the data from the decoder 44 outputs a control signal for operating the camera (for example, 2b) in the area where the sensing signal is transmitted to the data coding unit 46, and also the tuner 49 and the video signal detection unit. At step 50, the composite video signal sent from the camera is received.

The data coding unit 46 receives the control signal input from the microprocessor 45 from the sensor 1b.
And outputs it to the modulator 47 by coding the area code corresponding to. The modulator 47 mixes the input data and the high frequency signal oscillated by the local oscillator 47b by the mixer 47b, and modulates the high frequency signal with the area code data. Then, the high frequency signal output from the modulator 47 is transmitted to the transmitter 4
It is amplified and filtered at 8 and transmitted from the antenna 40.

The high frequency signal transmitted from the main body 3 is received by the corresponding camera (for example, 2b) of the cameras 2a, 2b, ..., 2n shown in FIG. The high frequency amplifying section 31 of the camera shown in FIG. 3 improves sensitivity by amplifying and filtering the received high frequency signal and outputs the high frequency signal to the demodulating section 32. The demodulation unit 32 mixes the input high frequency signal with the frequency oscillated by the internal local oscillator 32b by the mixer 32a to demodulate into a baseband signal, and the baseband signal is amplified by the baseband amplifier 33 and decoded by the decoder. It is output to 34. The decoder 34 decodes the input baseband signal and outputs it to the camera drive unit 35. The camera drive unit 35 drives the camera 37 and the microphone 36 when the code input from the decoder and the area code set in itself match.

The microphone 36 detects an audio signal in the monitoring area and outputs it by the operation signal from the camera driving section 35, and the camera 37 photographs the monitoring area and outputs a video signal. The audio signal and the video signal are output by modulating the carrier wave from the high frequency modulator 38,
It is amplified by the high frequency amplifier 39 and sent to the main body 3 via the antenna 30. The high frequency signals transmitted from the cameras 2a, 2b, ..., 2n are received by the tuner 49 controlled by the microprocessor 45 shown in FIG. 4, detected by the video signal detector 50, and displayed on the television. .

[0019]

As is apparent from the above description, according to the present invention, a wireless camera is installed in an area where each sensor is installed so that an abnormal area can be confirmed by an image, and wireless transmission / reception can be performed. In addition to eliminating the complexity associated with communication wiring, a code can be assigned to each monitoring area to send and receive data, so that data can be sent and received to and from multiple monitoring areas on one channel.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an example of the overall configuration of a home security system according to the present invention.

FIG. 2 is a block diagram showing an example of the configuration of a sensor according to the present invention.

FIG. 3 is a block diagram showing an example of a configuration of a camera according to the present invention.

FIG. 4 is a block diagram showing an example of a configuration of a main body unit according to the present invention.

FIG. 5 is a block diagram showing a conventional home security system.

[Explanation of symbols]

1a, 1b, .., 1n ... Sensor, 2a, 2b, .., 2n ... Camera, 3
... body part, 37 ... microphone, 38 ... camera, 41 ... receiving part, 45 ... microprocessor, 46 ... data coding part.

Claims (5)

[Claims] 1. In a home security system, a plurality of sensor units installed in a plurality of surveillance areas to detect security and safety abnormalities, and to send a detection signal together with an area code assigned to the surveillance area; A large number of camera units installed in the monitoring area of the unit for receiving the operation control signal, photographing the monitoring area, and wirelessly transmitting the video signal together with the area code assigned to the monitoring area; The area code and the sensed signal are received, the area code is decoded, the camera unit installed in the monitoring area is specified, the operation control signal is sent, and the image of the monitoring area captured by the camera section is received. A home set including a main body for receiving a signal and a monitor for receiving the video signal from the main body and displaying the video signal. Interview utility system. 2. The sensor unit includes a sensor for detecting an abnormal state, a data coding unit for coding a zone code of a monitored area when a sensing signal is input from the sensor, and a data coding unit for inputting the zone code. The home security system according to claim 1, further comprising: a transmitting unit that modulates a high frequency signal with the data to be transmitted and transmits the modulated high frequency signal. 3. The camera section includes a receiving section for receiving a high frequency signal and demodulating the high frequency signal, a decoder for decoding a signal input from the receiving section, and a code input from the decoder. It is characterized by including a camera driving unit that drives the camera when the set codes are compared with each other, and a transmitting unit that modulates a high frequency signal with a signal input from the camera and the microphone and sends the modulated high frequency signal. The home security system according to claim 1. 4. The main body section receives a high frequency signal sent from the sensor section and demodulates the high frequency signal, a decoder for decoding a signal input from the receiving section, and a decoder for decoding the signal. A microprocessor for receiving the data of the camera and outputting a camera operation signal, a data coding unit for receiving the signal from the microprocessor and coding the data, and a high frequency signal is modulated by the data input from the data coding unit. The home security system according to claim 1, further comprising a transmitting unit that transmits the camera to the camera unit. 5. The plurality of sensor units and the plurality of camera units are installed in pairs in a specific monitoring area, and an area code is given to the monitoring area in which each sensor unit and camera unit is installed. The home security system according to claim 1, wherein: