JPH0965328A - Intercom system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To use an intercom system for a monitor camera by providing an image display control means that takes difference between image signals monitored for each prescribed time and displaying the image onto a display means when the difference reaches a predetermined level or over to an intercom master set so as to monitor an outdoor state. SOLUTION: An image signal sent from a television camera 1 of an interphone slave set 2 to an interphone master set 4 is given to a difference circuit 18, in which the signal is subtracted from image signal data stored in a memory 17. In this case, when a state change is in existence in an image picked up by the television camera 1, a value based on the image signal is outputted. A CPU 12 compares the value with a preset level, and when the level reaches the prescribed level or over, it is discriminated that a state change takes place in the image pickup enable range by the television camera 1 and the image is displayed on a display device 3 and a notice means 19 is used to informs the occurrence of the state change by means of voice, light or an electric signal or the like.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a doorphone master unit provided with an intercom slave having an image pickup means and a display means electrically connected to the doorphone slave and displaying an image captured by the image pickup means. The present invention relates to an intercom system capable of confirming a visitor by an image when there is a visitor.

[0002]

2. Description of the Related Art FIG. 5 shows a block diagram of a conventional TV intercom which is a conventional intercom system.

Conventionally, this type of TV intercom has an intercom (doorphone) slave unit 52 (entrance slave unit) installed at a proper place in the entrance of the house and an image captured by the TV camera 51, which is provided with a TV camera 51 as an image pickup means. And an intercom (doorphone) master unit 54 which is provided at a proper place in the house and has a display 53 as a display unit for displaying.

The intercom slave unit 52 is an image signal processing circuit 5 for processing an image signal from the television camera 51.
5, call button 56 operated by the visitor, speaker 5
7, a microphone 58, a modulation / demodulation circuit 59 that modulates signals from the image signal processing circuit 55 and demodulates signals from the intercom master unit 54.

The intercom base unit 54 includes the display 53, a modulation / demodulation circuit 60, an image signal I / F circuit 61,
A CPU 62, an audio signal processing circuit 63, a speaker 64, a microphone 65, and a monitor button 66 are provided.

The intercom master unit 54 and the intercom slave unit 52 are electrically connected by, for example, a cable 67, so that a visitor pushes the call button 56 of the intercom slave unit 52 or a person in the room When a monitor operation such as pressing the monitor button 66 is performed, an image captured by the television camera 51 of the intercom slave unit 52 is displayed on the display 53 of the intercom master unit 54.

[0007]

However, in the TV intercom having the above-described structure, an external visitor pushes the call button of the intercom handset or a person inside the room presses the monitor button of the intercom base unit. Only when you press, the image captured by the TV camera of the intercom slave is not displayed on the display of the intercom master, so even if a suspicious person is prowling at the front door, etc. The suspicious person could be found only when the call button on the intercom slave was touched, or when a person in the room happened to operate the monitor button on the intercom master. Also, in case of fire etc., it can be confirmed only by operating the monitor button of the intercom base unit, and despite having a TV camera, this TV camera has not been fully utilized for security functions. It was

The intercom device of the present invention has been made in view of the above problems, and monitors the image signal from the image pickup means of the intercom slave unit at regular time intervals, and monitors the image signal at regular time intervals. When a difference is taken and the difference is equal to or higher than a predetermined level, the image is displayed on the display unit of the intercom (intercom) base unit, and it is confirmed that there is a change within the range that can be captured by the image capturing unit. The purpose is to inform people in the room.

[0009]

In order to achieve the above-mentioned object, an intercom apparatus according to claim 1 is an intercom slave having an imaging means, and the imaging means electrically connected to the intercom slave. And an intercom base unit provided with a display unit for displaying an image captured by the image sensor, the image signal from the image capturing unit is monitored at regular time intervals, and the difference between the monitored image signals is calculated at regular time intervals. The intercom base unit is provided with image display control means for displaying the image on the display means when the level is equal to or higher than a predetermined level.

A doorphone device according to a second aspect of the present invention includes a doorphone slave unit having an image pickup unit, and a display unit that is electrically connected to the doorphone slave unit and that displays an image picked up by the image pickup unit. The image signal from the image pickup means is monitored at regular intervals, the difference between the image signals monitored at regular intervals is calculated, and when the difference is equal to or greater than a predetermined level, the doorphone master An image transmitting means for transmitting an image to a machine is provided in the intercom slave, and a display control means for displaying the monitored image on the display means by transmitting the image of the image transmitting means is provided in the intercom base unit. .

According to a third aspect of the present invention, the intercom apparatus is provided with a monitoring slave unit provided with an image pickup unit and an image transmitting unit, or a plurality of the doorphone slave units, and the image transmitting unit of the monitoring slave unit or the intercom slave unit. The display control means displays the image on the display means by transmitting the image from the display means.

According to another aspect of the present invention, there is provided an intercom system in which a plurality of intercom slaves and a plurality of intercom masters corresponding to the intercom slaves are provided after a preset time. Management display control means is provided for displaying the image on the management display means of the centralized management panel that manages the housing complex by transmitting the image from the image transmission means of the intercom slave.

According to the first and second aspects of the invention, the image signal from the image pickup means of the intercom slave is monitored at regular intervals, and the difference between the monitored image signals is calculated at regular intervals. When this difference is equal to or higher than a predetermined level, the image is displayed on the display means of the intercom (intercom) base unit, and the person in the room is notified that there is a change within the range that can be picked up by the image pickup means. Inform.

According to the third aspect of the present invention, a monitoring slave unit or a plurality of intercom slave units are used to monitor the range that can be imaged by the image pickup means.

According to a fourth aspect of the present invention, when an image is transmitted from the image transmitting means of the intercom subunit after a preset time, the image is stored in the central control panel that manages the housing complex. The information is displayed on the management display means to notify the person who is managing the apartment complex that there is a change within the range that can be imaged by the imaging means.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a TV doorphone which is a doorphone apparatus of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the TV intercom of the first embodiment includes an intercom (doorphone) slave unit 2 (entrance slave unit) which is equipped with a TV camera 1 which is an image pickup means and is installed at a proper place in the entrance of a residence. The intercom (doorphone) master unit 4 is provided with a display 3 which is a display unit for displaying an image picked up by the television camera 1 and is arranged at a proper place in the house.

The intercom slave unit 2 includes an image signal processing circuit 5 for processing an image signal from the television camera 1, a call button 6 operated by a visitor, a speaker 7, a microphone 8, the image signal processing circuit 5 and the like. A modulation / demodulation circuit 9 that modulates a signal and demodulates the signal from the intercom master unit 4 is provided.

The intercom base unit 4 includes the display 3, the modulation / demodulation circuit 10, the image signal I / F circuit 11, and the CP.
U12, an audio signal processing circuit 13, a speaker 14, a microphone 15, and a monitor button 16 are provided, and a memory 17 for storing an image from the TV camera 1 of the intercom slave unit 2 is provided for guiding a variation amount of the image signal. A difference circuit 18 for performing a difference between two signals, for example, a buzzer, a light source, a detection signal generator, or the like for notifying based on a signal from the CPU 12 that the difference taken by the difference circuit 18 is equal to or higher than a predetermined level. The reporting means 19 is provided.

The intercom master unit 4 and the intercom slave unit 2 are electrically connected by a cable 20, for example.

The TV camera 1 of the intercom slave unit 2 does not operate only when there is a visitor like the TV camera of the conventional TV intercom, but always performs an image pickup operation and outputs its image signal to the intercom master unit. The image signal data from the TV camera 1 in a normal state, which is stored in the memory 17 in advance, or the TV camera 1 that is updated at a fixed time and stored in the memory 17 Have image signal data from.

The image signal transmitted from the television camera 1 of the intercom slave unit 2 to the intercom master unit 4 is subjected to a difference process with the image signal data stored in the memory 17 by the difference circuit 18. At this time, when there is no state change in the image captured by the TV camera 1, for example, when no person is captured in the TV camera 1, the difference amount processed by the difference circuit 18 becomes a sufficiently small value, and the state change If there is, that is, if a person or the like is captured in the television camera 1, a value based on this image signal is output.

The output value is compared with a predetermined level preset by the CPU 12, and when the value exceeds the predetermined level, a state change occurs in the image capturing range of the television camera 1. And display 3
In addition to displaying the image on the screen, the notification means 19 notifies the outside of the fact that a state change has occurred by using means such as voice, light, and electric signal, and informs the person in the room to pay attention to the person in the room. To monitor suspicious persons and suspicious objects at the front door.

The TV intercom of the second embodiment has the same structure as that of the first embodiment. The difference from the first embodiment is that the intercom slave 2 is connected to the TV camera 1 from the TV camera 1 as shown in FIG. Memory 21 for storing the image of the image, a difference circuit 2 for performing the difference between the two signals in order to derive the amount of change in the image signal.
2. CPU2 for controlling the memory 21 and the difference circuit 22
3 are provided.

Then, as in the first embodiment, the image signal from the television camera 1 of the intercom slave 2 is
When the image signal data stored in the memory 21 and the difference circuit 22 perform a difference process to change the state,
When the difference between the image signals processed by the difference circuit 22 exceeds a predetermined level, the CPU 23 determines that the state change has occurred in the image capturing range of the television camera 1, and the CPU 23 causes the modulation / demodulation circuit. 9 (on the intercom slave unit 2 side) and on the display 3 based on a signal transmitted via the modulation / demodulation circuit 10 (on the intercom master unit 4 side), and a notification means 19
At the same time, it notifies outside of the state change using sound, light, electric signal, etc., and also informs the people in the room to call attention of the person in the room and suspicious person or suspicious object at the entrance. Monitor.

The TV door phone according to the third embodiment has the same structure as that of the second embodiment. The difference from the second embodiment is that, as shown in FIG. The camera 24, the image signal processing circuit 25, the modulation / demodulation circuit 26, the memory 27, the difference circuit 28, and the monitoring camera 30, which is a monitoring slave unit including the CPU 29, are provided.
The intercom base unit 4 is provided with a switcher 31 for switching between the intercom slave unit 2 and the surveillance camera 30.

The monitoring camera 30 is the second camera.
The television camera 2 similar to the intercom subunit 2 of the embodiment
The image signal from No. 4 is subjected to the difference processing with the image signal data stored in the memory 27 by the difference circuit 28, and when there is a state change, the difference between the image signals processed by the difference circuit 28 becomes a predetermined level or more. If it becomes, CPU2 above
9 determines that the state change has occurred in the image capturing range of the television camera 24, and transmits the image signal and the ID of the monitoring camera from the CPU 29 via the modulation / demodulation circuit 26 (on the monitoring camera 30 side). To do.

On the basis of the transmitted ID, the switch 31 switches so as to transmit only with the monitoring camera 30 to prevent congestion with signals from other slaves, and based on the transmitted image signal, the display is displayed. In addition to displaying an image on the display 3, the notification means 19 uses an audio signal, an optical signal, an electric signal, or the like to notify the outside that the state change has occurred, and informs the person in the room to notify the person in the room. To monitor suspicious persons and suspicious objects at the front door.

At this time, the CPU 12 of the intercom base unit 4
Continues to monitor the signal from the CPU 23 of the other intercom slave unit 2, determines that the state change has occurred from the other intercom slave unit 2, and determines the image signal and the intercom slave unit 2.
When the ID is transmitted, the switch 31 of the intercom master unit 4 alternately switches the images from the surveillance camera 30 and the intercom slave unit 2, and the surveillance camera 3
0 and both images from the intercom slave unit 2 are displayed on the display 3, and the state of the image-capable range of all intercom slave units 2 and the monitoring camera 30 connected to the intercom master unit 4 is monitored. It is possible.

In the above embodiment, one intercom slave unit and one surveillance camera are provided, but the number of intercom slave units and surveillance cameras is not limited to one each, and a plurality of intercom slave units and surveillance cameras are provided and each is given an ID. By doing so, the control can be performed in the same manner as described above.

The TV intercom of the fourth embodiment is provided with the intercom slave unit 2 and the monitoring camera 30 as in the third embodiment. The difference from the third embodiment is that the intercom master unit 4 is used. , Intercom subunit 2, TV intercom equipped with surveillance camera 30 is installed in each residence of apartment such as condominium, so that the state change in each home can be monitored even in the manager room that manages the apartment. As shown in FIG. 4, the modulation / demodulation circuit 32 and the image signal I
/ F circuit 33, display 34, audio signal processing circuit 3
5, speaker 36, microphone 37, CPU 38, memory 3
9, an intercom master unit 42 for a management room, which is a central control panel including an RTC (real time clock) 40 and a switch 41, is connected to the intercom slave unit 2 and the monitoring camera 30 in parallel with the intercom master unit 4. ing.

The intercom master unit 4 for the manager room
When the time measured by the RTC 40 of No. 2 reaches the preset first time, the CPU 38 causes the CP of the intercom base unit 4 to operate.
The U12 is notified that the preset time has come, and all the switching devices 31 of the intercom master unit 4 are opened.

Therefore, all the signals from the intercom slave unit 2 and the monitoring camera 30 are transmitted to the intercom master unit 42 for the manager room, and the intercom slave unit 2 or the monitoring camera 30 picks up an image. When a state change occurs within the range, all the state changes are transmitted to the intercom master unit 42 for the manager's room, and the image from the intercom slave unit 2 or the monitoring camera 30 is displayed on the display 34.

At this time, the manager monitors the image by displaying or notifying at the same time as which image the image currently displayed on the display 34 is from the intercom subunit 2 or the monitoring camera 30 of the residence. It is possible to do.

The intercom master unit 4 for the manager room
When the time measured by the RTC 40 of No. 2 reaches the preset second time, the CPU 38 causes the C of the intercom base unit 4 to
Send to PU12 that the preset time has come,
All the transmission paths are set by switching the switch 31 of the intercom master unit 4, and monitoring is performed at each residence.

[0036]

Since the intercom apparatus according to the first aspect of the present invention has the above-mentioned configuration, the state of the range in which the image is picked up by the image pickup means is changed, that is, a suspicious person is prowling to the front door, a fire or the like. It is possible to inform a person in the room of the change in the state of, the outdoor can be monitored, and the doorphone device can be used as a monitoring camera.

Since the intercom apparatus according to the second aspect has the above-mentioned configuration, the state of the range in which the image is picked up by the image pickup means is changed, that is, a suspicious person is prowling at the front door, a fire or the like. Can be informed to a person in the room, the outdoors can be monitored, and the doorphone device can be used as a monitoring camera. Moreover, since the difference between the image signals is taken on the intercom slave unit side, it is possible to reliably prevent erroneous detection of a change in state due to noise or the like on the transmission line connecting the intercom slave unit and the intercom master unit. it can.

Since the intercom apparatus according to the third aspect has the above-mentioned configuration, a separate monitoring system using the monitoring slave is installed by using the monitoring slave or a plurality of intercom slaves. Without, it is possible to build a home monitoring system centered on the doorphone device.

Since the intercom system according to the fourth aspect has the above-mentioned configuration, in an apartment house or the like having a manager room, the state of the individual dwellers changes at a preset time, for example, at midnight. When you are there, you can go to bed without being awakened by the signal transmitted from the intercom slave, and you can concentrate on the monitoring in the management room, so that people in individual residences can sleep comfortably. You can Moreover, the door intercom device of each residence can be used, and it is possible to surely monitor the suspicious person (intruder) without noticing it, and it is possible to monitor most of the housing complex. Moreover, it is possible to grasp the intrusion route of the suspicious individual (intruder) from the history of the doorphone device (doorphone handset) that detects the change in state when there is a suspicious individual (intruder), and It is possible to deal with it and to ensure safety thereafter.

[Brief description of drawings]

FIG. 1 is a block diagram showing a television door phone according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing a television door phone according to a second embodiment of the present invention.

FIG. 3 is a block diagram showing a television door phone according to a third embodiment of the present invention.

FIG. 4 is a block diagram showing a television door phone according to a fourth embodiment of the present invention.

FIG. 5 is a block diagram showing a conventional television door phone.

[Explanation of symbols]

 1 TV camera 2 Intercom (doorphone) Remote unit 3 Display 4 Intercom (doorphone) Master unit 5 Image signal processing circuit 11 Image signal I / F circuit 12 CPU 17 Memory 18 Difference circuit 19 Notification means 21 Memory 22 Difference circuit 23 CPU 30 Monitoring Camera (slave unit) 31 switcher 41 switcher 42 management intercom intercom base unit (centralized control panel)

Claims (4)

[Claims] 1. An intercom unit comprising an intercom slave having an imaging means, and an intercom master having electrically connected to the intercom slave and having display means for displaying an image captured by the imaging means. The image signal from the image pickup means is monitored at regular time intervals, and the difference between the monitored image signals is calculated at regular time intervals.
An intercom system, wherein the intercom base unit is provided with image display control means for displaying the image on the display means when the difference is equal to or more than a predetermined level. 2. An intercom unit comprising an intercom slave having an imaging means, and an intercom master having electrically connected to the intercom slave and having display means for displaying an image captured by the imaging means. The image signal from the image pickup means is monitored at regular time intervals, and the difference between the monitored image signals is calculated at regular time intervals.
If the difference is equal to or more than a predetermined level, an image transmitting unit for transmitting an image to the intercom base unit is provided in the intercom slave unit, and the monitored image is transmitted by the image transmission of the image transmitting unit. An intercom system in which display control means for displaying on a display means is provided in the intercom base unit. 3. A monitoring slave unit including an image pickup unit and an image transmitting unit or a plurality of the intercom slave units are provided, and the image is transmitted from the image transmitting unit of the monitoring slave unit or the intercom slave unit. 3. The display control means causes the display means to display the image.
Doorphone device described. 4. An image transmission of a doorphone slave unit after a preset time in an apartment house provided with a plurality of doorphone slave units and a plurality of doorphone master units corresponding to the respective doorphone slave units. 3. An intercom apparatus according to claim 2, further comprising management display control means for displaying the image on the management display means of the centralized management panel that manages the housing complex by transmitting the image from the means.