JPH0689390A - Monitor device - Google Patents

Abstract

PURPOSE:To eliminate the need to monitor a monitor screen, etc., at all times by outputting the video signal from an image pickup means to a specific display part or video recording part in response to the human body detection signal outputted from an infrared detecting means. CONSTITUTION:An image pickup part 10 for monitoring is equipped with the camera part 11 composed of a lens and a CCD, a microphone 12 which gathers a voice, and an infrared detecting circuit 13. The human body detection signal detected by the infrared detecting circuit 13 is modulated by a modulating circuit 14 together with the video signal from the camera part 11 and the voice signal sent from the microphone 12 and then sent out to a reception part 20. The modulated signal from the image pickup part 10 for monitoring is demodulated by the demodulating circuit 21 of a reception part 20 to discriminate the video signal, voice signal, and human body detection signal. Only when the human body detection signal is inputted, a CPU 23 turns on a switch circuit 22 to pass the video signal and voice signal, which are displayed on a monitor. If, however, the human body detection signal is absent, the switch circuit 22 is turned off and neither the video nor voice signal is outputted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surveillance device applied to a security system or the like, and more particularly to a surveillance device which senses and operates a person.

[0002]

2. Description of the Related Art A surveillance camera of this type is generally a surveillance camera. This surveillance camera is often installed in banks, buildings, hotel lobbies, etc., but the main surveillance target is a person.

In a private house or the like, it is sufficient to install one at the entrance, but when the surveillance area is wide or diverse, a surveillance camera is installed in each of them, and the surveillance camera is sequentially switched on the monitor side. I try to get a video.

[0004]

However, in any case, even if there is no person to be monitored, it is necessary to keep monitoring by setting the monitor screen as a display state. In addition, when recording on a VCR or the like, it is necessary to record even for an unnecessary period of time, which requires a tape capable of recording for a long time.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional circumstances, and its structural features are as follows.
The monitoring image pickup unit includes an image pickup unit and an infrared ray detection unit for detecting infrared rays emitted from the human body, and a receiving unit connected to the monitoring image pickup unit wirelessly or by wire. The control means is provided for outputting the video signal from the image pickup means to a predetermined display section or recording section in response to the human body detection signal output from the means.

In this case, the television screen is switched in response to the human body detection signal, and the video signal from the image pickup means is displayed on the screen so as to be interrupted.
In the case where a plurality of monitoring imaging units are installed,
It is preferable to preferentially display the video signal from the monitoring imaging unit that has detected the human body detection signal in response to the human body detection signal on the monitor screen.

[0007]

According to the above construction, only when a person is detected through infrared rays emitted from the human body, the image is projected or recorded on the VCR or the like.

Further, for example, by storing the remote control mode of the television receiver, the screen is switched when a person is detected and the screen is switched even when the television receiver is viewed, and the image is displayed on the television receiver. Displayed on the screen.

Furthermore, when a person is detected when a plurality of surveillance cameras (surveillance image pickup units) are switched at predetermined time intervals and the images thereof are sequentially displayed on the monitor,
The video of the surveillance camera is preferentially displayed on the monitor.

[0010]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a block diagram of a surveillance image pickup unit 10 as a surveillance camera, and FIG.
A block diagram of is shown.

According to this, the monitoring image pickup unit 10 includes a camera unit 11 including a lens and a CCD, a microphone 12 for taking a sound, and an infrared detection circuit 13.
In this case, the infrared detection circuit 13 is limited in directivity and wavelength by the filter 13a. In this embodiment, infrared rays having a wavelength of about 10 μm emitted from the human body are approached by a distance of 2 to 3 m.
Detect within the range of.

This person detection signal is modulated by the modulation circuit 14 together with the video signal from the camera section 11 and the audio signal from the microphone 12, and then sent to the receiving section 20 in FIG.

The receiver 20 comprises a demodulation circuit 21.
The modulated signal from the monitoring image pickup unit 10 is demodulated by the demodulation circuit 21 and discriminated into a video signal, an audio signal and a person detection signal.

The video signal and the audio signal are output as they are through the switch circuit 22 in the next stage or are output after being modulated again to the TV frequency by the modulation circuit 24, but the person detection signal is output. Entered in.

The control circuit 23 turns on the switch circuit 22 to pass the video signal and the audio signal only when the person detection signal is input, but when there is no person detection signal, the switch circuit 22 is turned off to detect the video signal. Do not output audio signals.

Next, a more specific description will be given with reference to FIGS. 3 and 4. According to this, both the voice signal from the microphone 12 and the person detection signal output from the infrared detection circuit 13 are input to the subcarrier modulation circuit 15.

In this case, in the modulation circuit 15, the voice signal is subjected to normal FM modulation, and the person detection signal is used to turn on / off the pilot signal used in FM stereo. That is, when there is a person detection signal, for example, the pilot signal is turned on, and when there is no person detection signal, the pilot signal is turned off, for example,
The receiving unit 20 side can demodulate the person detection signal.

The subcarrier signal from the modulation circuit 15 is mixed with the video signal from the camera section 11 by the mixer 16, and then modulated to the RF frequency by the modulation circuit 14, and emitted from the antenna 17 in this example. It

Although various methods can be applied as the modulation method of the modulation circuit 14, in this example, the same V as for terrestrial broadcasting is used.
LSB (VESTIGEL LOW SIDE BAN
D; one type of SSB), the above audio subcarrier is inserted at a position of 4.5 MHz from the carrier, and the video signal is modulated by VLSB.

The receiver 20 has an antenna 25, and a signal received by the antenna 25 is separated into a video signal and an audio subcarrier by a filter (not shown), and the video signal is a first demodulation circuit (VLSB demodulation circuit). 21a, and the audio subcarrier is demodulated by the second demodulation circuit (FM demodulation circuit) 21b.

The demodulated video signal is input to the on-screen addition circuit 26, and after the information such as date and time required by the user is added in the on-screen addition circuit 26, it is output to the switch circuit 22.

The second demodulation circuit 21b is provided with a pilot detection circuit, by which a person detection signal is picked up and input to the CPU 23 as a control circuit, and an audio signal is supplied to the switch circuit 22. .

When the person detection signal is input, the CPU 23 turns on the switch circuit 22. As a result, the video signal and the audio signal are output from the video output terminal 27a and the audio output terminal 27b, respectively.

Further, the receiving section 20 includes a switch circuit 22.
The video and audio signals output via the TV signal (RF
A modulation circuit 28 for modulating into a signal) is provided, and the modulation circuit 28 is controlled by the CPU 23 to switch between the antenna input 28a and the TV output 28b when a person detection signal is received.

That is, the antenna input 28a is selected when the person is not detected by the monitoring image pickup unit 10, but when the person is detected by the image pickup unit 10, the video signal and the audio signal are modulated. It is modulated to the RF frequency at 28 and sent out from the TV output 28b.

The CPU 23 is provided with a light receiving circuit 29 for receiving a remote control signal.
By setting a code such as R, the monitoring imaging unit 1 can be used even when receiving a television broadcast, for example.
When a person is detected at 0, the screen can be switched to the surveillance video.

A display device 30 is connected to the CPU 23. The display device 30 displays various states. For example, in the case of a single camera, it is turned on when detecting a person.
Or in the case of a learning remote controller, the learning step is displayed, and in the case of a multi-camera, the selected monitor number or the like is displayed.

Although not shown, the CPU 23 may be provided with a remote control code light emitting circuit, and the remote control code stored in the CPU 23 may be output to a TV, a VCR or the like as needed.

FIG. 5 shows a block diagram of the monitoring image pickup unit 10 _n (n = 2, 3 ...) When a multi-camera is used, that is, when a plurality of monitoring image pickup units are used. FIG. 6 exemplifies a block diagram of the receiving unit 20a corresponding thereto.

The monitoring image pickup unit 10 _n and the receiving unit 20 a are basically the same as those in the above embodiment, but the RF frequency of the modulation circuit 14 is individually set in each monitoring image pickup unit 10 _n. A frequency setting circuit 18 is provided to transmit at different RF frequencies. .

On the other hand, in the receiving section 20a, the first demodulation circuit 21a is provided with a tuning function, and C
The PU 23 automatically switches the reception frequency so that each monitoring imaging unit 10 _n can be selected.

Further, the receiving section 20a is provided with a monitor 31 and a speaker 32 for exclusive use. In this regard, however, it goes without saying that a home-use television receiver or VCR may be connected as in the above embodiment.

In the case of a multi-camera, the monitoring image pickup units 10 _n are switched as follows, for example. When no person is detected by the infrared detection circuit 13, the monitoring image pickup units 10 _n are sequentially switched in units of 1 second.

On the other hand, when a person is detected by a certain infrared detection circuit 13, the screen of the monitor 31 is forcibly switched to the monitoring image pickup unit 10 _n, and the display is continued for 5 seconds. If there is no hold request signal in the meantime, the process proceeds to the automatic switching routine every 1 second. If there is a hold request signal, the screen is continuously displayed. For reference, this flowchart is shown in FIG.

When a plurality of monitoring image pickup units 10 _n detect a person at the same time, the automatic switching routine may be executed only for those cameras.

In the above embodiment, the monitoring image pickup unit 10 and the receiving unit 20 are connected wirelessly, but it goes without saying that they may be connected by wire.

[0037]

As described above, according to the present invention, the monitoring image pickup unit including the image pickup unit and the infrared ray detection unit for detecting the infrared rays emitted from the human body and the monitoring image pickup unit wirelessly or by wire are provided. With a receiving unit connected,
Since the video signal from the image pickup means is output to the display section or the recording section only when the person is detected by the infrared detection section, it is not necessary to constantly monitor the monitor screen or the like, and the VCR or the like is recorded. In this case, the tape can be used without any waste.

[Brief description of drawings]

FIG. 1 is a block diagram of a monitoring image pickup section according to a basic first embodiment of the present invention.

FIG. 2 is a block diagram showing a receiving unit of the first embodiment.

FIG. 3 is a block diagram of a monitoring image pickup unit according to a second embodiment of the present invention.

FIG. 4 is a block diagram showing a receiving unit of the second embodiment.

FIG. 5 is a block diagram of a monitoring image pickup unit according to a third embodiment of the present invention.

FIG. 6 is a block diagram showing a receiver of the third embodiment.

FIG. 7 is a flowchart showing a monitor switching operation of the third embodiment.

[Explanation of symbols]

 10 Monitoring Imaging Section 11 Camera Section 12 Microphone 13 Infrared Detection Circuit 13a Filter 14 Modulation Circuit 20 Reception Section 21 Demodulation Circuit 22 Switch Circuit 23 Control Circuit (CPU) 24 Modulation Circuit

Claims (3)

[Claims] 1. A receiving unit comprising a monitoring image pickup unit including an image pickup unit and an infrared ray detection unit for detecting infrared rays emitted from a human body, and a receiving unit connected to the monitoring image pickup unit wirelessly or by wire. The monitoring device is provided with a control means for outputting a video signal from the imaging means to a predetermined display section or a recording section in response to a human body detection signal output from the infrared detection means. 2. The control means switches the television screen in response to the human body detection signal, and displays the video signal from the imaging means on the same screen.
The monitoring device described in 1. 3. A plurality of the monitoring image pickup units are installed, and the control means preferentially displays a video signal from the monitoring image pickup unit, which has detected the human body detection signal in response to the human body detection signal, on a monitor screen. The monitoring device according to claim 1, wherein: