JPH03117193A - Television doorphone device - Google Patents

Abstract

PURPOSE:To improve the burglar-proof by connecting a space sensor to a call button of a gatedoor slave set, inputting a call signal to a CPU of an in-room master set with a detection signal of the space sensor, ringing a call tone and displaying a video image of a visitor on a television monitor simultaneously. CONSTITUTION:When a visitor is resident for a prescribed time near a gatedoor slave set 10, a space sensor 60 senses the presence of the visitor even when the visitor does not depress a call button 20. When a signal is outputted to the call button 20, a signal is outputted from a multiplex circuit 31 of a monitor unit to the CPU via terminal 10a, a 2-wire balanced cable CBL and a terminal 30a. The CPU outputs a call signal to a call tone generating circuit 97 to sound a sounding element 98 via a speech circuit 95 of the in-room master set 94. Simultaneously, the CPU outputs a power supply signal to a voice circuit 96, a video amplifier 81 and a television monitor 80. Then the signal is displayed on the television monitor 80 via the video amplifier 81.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a video door intercom device, and particularly to a video door intercom device that can emit a ring tone and monitor a video signal even when a visitor does not press a call button.

[Prior Art and Problems to be Solved by the Invention] Conventionally, there have been video door intercom devices that have an automatic visitor notification function that notifies visitors of suspicious persons for crime prevention purposes. As shown in Fig. 3, this type of video door intercom device has a camera-equipped doorway handset 1 connected to the handset ■ side of a two-station indoor base unit 4 to which a monitor unit 3 is connected via a line L□. , the indoor base unit 4 for two stations
A space sensor 6 is connected to the slave unit ■ side via line L2, and the camera-equipped entrance slave unit 1 and the monitor unit 3 are connected by a coaxial cable CX■. Even without pressing the call button 2 of the handset 1, the space sensor 6 connected to the ringer circuit 5 provided in the indoor base unit 4 via a resistor R detects the presence of a visitor and sends out a detection signal. A ringtone will then sound to alert you to the presence of the visitor. However, since the handset ■ side is not linked to the monitor unit l-3, unless the monitor button A is turned on, power will not be supplied to the camera 7 and TV monitor 8 of the entrance handset 1, and the visitor will not be displayed on the TV monitor 8. I couldn't.

Therefore, the detection signal from the space sensor is sent to line L,
At the same time as sending a ring tone, the camera of the main unit at the entrance was automatically activated so that the video signal could be received by the TV monitor of the indoor main unit.

However, even if you try to apply this method to a system in which the indoor base unit and the doorway slave unit are connected by a two-wire balanced cable, the power, video, audio, etc. signals are multiplexed on the two-wire balanced cable. Therefore, there was a drawback that it could not be realized as it was.

The present invention has been made to solve the above-mentioned drawbacks, and an object of the present invention is to provide a video door intercom device connected with a two-wire balanced cable that automatically calls a call button without the visitor pressing a call button. To provide a very effective video door intercom device capable of sounding a ringing tone and simultaneously monitoring both audio and video, and preventing crime.

- [Means for Solving the Problems] In order to achieve the above object, the video door intercom device of the present invention includes a call button that sends out a call signal when pressed by a visitor, and a video signal of the visitor. An indoor parent unit equipped with a doorway handset equipped with a camera unit, a ringing tone generation circuit that generates a ringtone based on the ringing signal, a television monitor that displays an image based on the video signal, and an audio circuit for communicating with the doorway handset. The doorway slave unit is connected to the visitor using a two-wire balanced cable, and the doorway slave unit is equipped with a space sensor that detects the presence of the visitor and outputs the calling signal, and the indoor base unit is connected to the doorway station when receiving the calling signal. A CPU is provided which outputs a power supply signal to each of the audio circuit, the camera section, and the television monitor, and sends a signal to the ring tone generation circuit.

[Function] By connecting the space sensor to the call button of the door handset, the video door intercom device of the present invention generates a call signal as if the call button was pressed even if the call button is not pressed by the detection signal of the space sensor. 4- The signal is input to the CPU of the indoor base unit, and at the same time the power supply signal is output to the entrance slave unit's camera and the indoor base unit's TV monitor at the same time as the normal operation, that is, the ring tone sounds, and the image of the visitor is output. is displayed on the television monitor. Therefore, it is possible to send and receive call signals, which is very good in terms of crime prevention.

[Embodiment] An embodiment of the video door intercom device of the present invention will be described with reference to the drawings.

As shown in the configuration diagram in Figure 1 and the block diagram in Figure 2,
A camera eye 71 connected to the camera unit 70, a speaker 91 and a microphone 92 connected to the audio circuit 9, a call button 20, and the like are mounted on the entrance handset 10. Also, camera section 7
A multiplex circuit that multiplexes or separates the video signal from 0, the audio signal input/output to the audio circuit 9, the call signal from the call button, and the power control signal to the camera unit 70 and the audio circuit 9]
1 is provided. The terminal 10a of the entrance slave unit 10 is connected to the entrance slave unit 10 via the terminal 30a by the two-wire balanced cable CBL.
The monitor unit 30 connected to the monitor unit 30 is provided with a multiplexing circuit 31 that multiplexes or separates a calling signal, a video signal, an audio signal, and a power control signal, and monitors the video signal separated by the multiplexing circuit 31 via a video amplifier 81. TV monitor 80
is provided. Further, an audio circuit 96 inputs and outputs an audio signal input/output via the multiplex circuit 31 to the transmitter/receiver 93 via the calling section circuit 95 of the indoor main unit 94, and a calling circuit 96 where a calling signal is input via the multiplex circuit 31. A CPU that outputs a signal to the sound generation circuit 97 is provided.

The ringing tone generating circuit 97 sends a signal via the talking section circuit 95 to cause the sounding element 98 to ring. The CPU also outputs a power supply signal to the video amplifier 81 and the television monitor 80 at the same time as transmitting a signal to the ringing tone generation circuit 97, and further supplies power to the camera unit 70 of the entrance handset 10 via the multiplex circuit 31.11. Output a signal.

Furthermore, when the space sensor 60, which is a feature of the present invention, is connected to the call button 20 of the entrance handset 10 and the detection signal of the space sensor 60 is input to the call button 20, it is the same as if the call button 20 was operated by a human. state, multiplex circuits 11 and 3
A paging signal is sent to CPLJ via 1. The space sensor 60 is configured to be supplied with power from an AC power source via a power adapter 61.

The operation of the video intercom device configured as above will be explained.

When a visitor stays near the entrance handset 10 for a certain period of time, the space sensor 60 detects the presence of the visitor and outputs a signal to the call button 20 without pressing the call button 20.
is in a pressed state, and the terminal 1.0 is transferred from the multiplex circuit 11 to the terminal 1.0.
a, a signal is output from the multiplex circuit 3 of the monitor units l to the CPU via the two-wire balanced cable CBL and the terminal 30a. The CPU outputs a ringing signal to the ringing tone generating circuit 97 and transmits the ringing signal to the sounding element 98 via the talking section circuit 95 of the indoor base unit 94.
sound. At the same time, the CPU has an audio circuit 96,
A power supply signal is output to the video amplifier 81 and the television monitor 80. As a result, the communication section circuit 95 is activated to enable communication, and the image of the entrance captured by the camera eye 71 of the entrance handset 10 on the TV monitor 80 is converted into a video signal by the camera section 70 and then passed through the multiplex circuit 11.31. The image is then displayed on a television monitor 80 via a video amplifier 81.

Further, the sound generating element 98, which rings in response to a calling signal from the calling button 20, stops generating a ringing tone after ringing for a certain period of time.

[Effects of the Invention] As is clear from the explanations given below, according to the video door intercom device of the present invention, if there is a visitor even if the call button is not pressed by the space sensor, it is determined that the call button has been pressed. Since the indoor main unit is in the same state, it becomes possible to talk and automatically closes the vicinity of the main unit at the entrance, which is very effective in terms of crime prevention and can ensure safety at a low cost.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a video door intercom device according to the present invention, FIG. 2 is a block diagram of an embodiment shown in FIG. 1, and FIG. 3 is a diagram showing a conventional example. 10... Entrance handset 20... Call button 60... Space sensor 70... Camera section 80... TV monitor 94... ...Indoor base unit 96...Audio circuit 97...Ring tone generation circuit

Claims (1)

[Claims] A doorway handset equipped with a calling button that sends out a calling signal when pressed by a visitor and a camera section that outputs a video signal of the visitor, a ringing tone generation circuit that sounds a ringing tone in response to the calling signal, and the video. A TV monitor that displays images based on the signal and an indoor main unit equipped with an audio circuit for communicating with the doorway handset are connected by a two-wire balanced cable, and the doorway handset detects the presence of the visitor. A space sensor that outputs the calling signal is provided, and when the indoor main unit receives the calling signal, it outputs a power supply signal to each of the audio circuit, the camera unit, and the television monitor, and sends a signal to the ringing tone generating circuit. 1. A video door intercom device characterized by being provided with a CPU that transmits.