JPS6367088A - Door phone camera system for multiple dwelling house - Google Patents

Abstract

PURPOSE:To make unnecessary the connection of a power cable to each room unit, and to reduce an installing expense, by superimposing a DC power on a communication line by a power supplier, and performing the supplying of a power to the room unit comprehensively. CONSTITUTION:When a visitor depresses the call button of an outdoor unit 100, a call signal corresponding to the above is outputted. The call signal is detected only by the room unit 300 of a visiting place. Also, by the call operation of the visitor, a constant current is supplied from the power supplier to the room unit 300. Meanwhile, when the call signal is detected by the room unit 300 receiving a visit, the power is supplied to a monitor, television 303, and an interphone unit. And the power is supplied to a camera unit, and the interphone unit in the outdoor unit 100 by a busy signal transmitted from the room unit 300 to the outdoor unit 100. The call signal, a video signal, and the busy signal transmitted between the outdoor unit 100, and the room unit 300, are multiplexed, and are transmitted by a pair of communication lines.

Description

Detailed Description of the Invention (Technical Field) The present invention comprises an outdoor unit equipped with a camera unit installed to monitor the entrance of an apartment complex, and a monitor television installed in each household in the apartment complex. This relates to a doorbell camera system for apartment complexes consisting of multiple indoor units, etc., and in particular, a call signal.

This field relates to technology for multiplexing audio signals, video signals, busy signals, DC power, etc., and transmitting the multiplexed signals over a pair of communication lines.

(Prior Art) This type of doorbell camera system for apartment complexes includes an outdoor unit equipped with a camera unit installed at the entrance of the apartment complex to capture images of visitors to the apartment complex, and It consists of a plurality of indoor units equipped with monitor televisions that are installed in each household in an apartment complex to display images. In addition to the above-mentioned camera unit, the outdoor unit usually includes a call button for visitors to call the household they are visiting, an intercom unit for the visitor to communicate with the household they are visiting, and commands from the household they are visiting. This includes electronic locks at entrances to apartment complexes that are opened and closed by On the other hand, the indoor unit includes, in addition to the monitor television, a doorbell that announces a visit, an intercom unit that communicates with visitors, a button switch for opening and closing the electronic lock, and the like.

In this way, call signals, audio signals, video signals, electronic lock control signals, etc. transmitted between the outdoor unit and the indoor unit are transmitted individually via a composite cable installed between the outdoor unit and the indoor unit. is being transmitted to.

However, as described above, the work of connecting the outdoor unit and the indoor unit using a composite cable is complicated, and there is a problem in that the cost of installing the doorbell camera system increases. In addition, conventional doorbell camera systems for apartment complexes require the installation of individual power cables to supply power to multiple indoor units, which also increases the installation cost of doorbell camera systems for apartment complexes. (to be a cause)

(Object of the Invention) The present invention has been made in view of the above circumstances, and an object of the present invention is to realize a doorbell camera system as described above at a relatively low cost.

(Structure of the Invention) In order to achieve the above object, the present invention has the following structure.

That is, the doorbell camera system for an apartment complex according to the present invention includes an outdoor unit installed at the entrance of the apartment complex, a plurality of indoor units installed in each household of the apartment complex, and the outdoor unit and each of the indoor units. and a power supply device that supplies DC power to each of the indoor units via the communication line, and the outdoor unit includes a camera unit that photographs a visitor, and a power supply that supplies DC power to each of the indoor units via the communication line, an intercom unit for communication between the visitor and the indoor unit operator; a group of call buttons for calling the indoor unit at the visitor's destination; and a call signal generator that generates a call signal corresponding to the call button pressed by the visitor. ,
a signal multiplexing means for multiplexing a video signal output from the camera unit, an audio signal output from the intercom unit, and a call signal output from the call signal generator and transmitting the same to the indoor unit; (a signal separating means for separating a voice signal and a busy signal from a multiplexed signal and supplying the voice signal to the intercom unit; a busy signal detector for detecting the busy signal; and a busy signal detector for detecting the busy signal. a power supply unit that supplies electric power to the camera unit and the intercom unit based on the output of each of the indoor units includes a signal separation means for separating the multiplexed signal transmitted from the outdoor unit into a video signal, an audio signal, a call signal, and a constant current, and a monitor television unit to which the video signal is applied. an intercom unit to which the audio signal is applied; a ringing signal detector which detects a ringing signal corresponding to each indoor unit; a constant current unit that supplies power to the unit and the intercom unit; a busy signal generator that generates a busy signal based on an operation by an operator of the indoor unit in response to a call from the outdoor unit; and the intercom unit. The apparatus is characterized in that it includes a signal multiplexing means for multiplexing the audio signal output from the busy signal generator and the busy signal output from the busy signal generator and outputting the same to the outdoor unit.

Next, the present invention having the above-described configuration will be described in detail.

When a visitor presses a call button for the destination from among the group of call buttons on the outdoor unit, a call signal corresponding to the call button is output from the call signal generator. This call signal is detected only by the indoor unit at the visited location. In addition, a constant current is supplied from the power supply to the indoor unit by the visitor's calling operation. On the other hand, when a call signal is detected on the indoor unit side that receives a visitor, power is supplied to the monitor television unit and intercom unit of that indoor unit. A busy signal is transmitted from the indoor unit to the outdoor unit by an operation by an operator on the indoor unit side in response to a call from the outdoor unit. This busy signal supplies power to the camera unit and intercom unit of the outdoor unit. As a result, the camera unit and intercom unit of the outdoor unit are driven. Call signal and video signal transmitted between the outdoor unit and indoor unit.

Voice signals, busy signals, etc. are multiplexed and transmitted through a pair of communication lines. On the other hand, since the call signal is not detected for other indoor units that have not been called by the visitor, power is not supplied to the camera units and intercom units in these indoor units. Therefore, it is not possible for other indoor units to secretly view and listen to the calls and videos between the visitor and the destination.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram schematically showing the configuration of a doorbell camera system for apartment complexes according to an embodiment of the present invention.

The doorbell camera system for apartment complexes according to this embodiment is as follows:
One outdoor unit 100 installed at the entrance of an apartment complex, and a plurality of indoor units 300 installed in each household in the apartment complex (however, one indoor unit is representatively shown in the figure). ,
A pair of communication lines connecting the outdoor unit 100 and each of the indoor units 300, and a power supply/repeater 200 that supplies DC power to each of the indoor units 100 via the communication line = 8 − I am. The power supply/repeater 200 corresponds to the power supply device described in the section of the configuration of the invention.

In the outdoor unit 100, a CCD camera 101 that photographs a visitor and a video FM modulator 102 that frequency modulates the video signal of the CCD camera 101 correspond to a camera unit. Speaker SP1, microphone MICI, and audio circuit 103 constitute an intercom unit. The call button group 104 includes a plurality of call buttons provided corresponding to the plurality of indoor units 300. The output of the call button group 104 is given to a control circuit 105, which controls the call signal generation circuit 106.
is controlled. The call signal generation circuit 106 generates a carrier of a frequency corresponding to the call button pressed by the visitor. Video FM modulator 102, audio circuit 10
3 and the respective output signals of the calling signal generation circuit 106 are as follows:
The signal is applied to a multiplexing/separating circuit 107. Multiplex/separate circuit 1
07 corresponds to the signal multiplexing means and signal separation signal described in the section of the configuration of the invention. The multiplexing/separating circuit 107 separates the multiplexed signal transmitted from the indoor unit 200. The busy signal detector 108 detects a busy signal included in the output signal separated by the multiplexing/separating circuit 107. The output of the busy signal detector 10B is given to the control circuit 105,
Accordingly, the control circuit 105 controls the power supply unit 110.

The power supply unit 110 supplies power to the camera unit and intercom unit based on a control signal from the control circuit 105. However, power is always supplied to each part of the outdoor unit other than these. The electronic lock signal detector 109 controls the opening and closing of the electronic lock 111 at the entrance of the apartment complex based on detecting an electronic lock signal from the output of the multiplexing/separating circuit 107 .

The power supply/repeater 200 includes a signal repeater 201 that amplifies and outputs the multiplexed signal transmitted from the outdoor unit 100, a calling signal detector 202 that detects a calling signal included in the multiplexed signal, and a calling signal detector 202 that detects a calling signal included in the multiplexed signal. The constant current unit 7) 203 superimposes a constant current on the multiplexed signal based on the output of the multiplexed signal. The power supply/repeater 200 is provided, for example, on each floor of an apartment complex, and relays signals and supplies power to indoor units on that floor. Therefore, the power supply
The call signal detector 202 in the repeater 200 has band characteristics to detect a plurality of call signals corresponding to the indoor units on that floor.

In the indoor unit 300, the multiplexing/separating circuit 301 includes a separating means for separating the multiplexed signal transmitted from the outdoor unit 100, and a multiplexing unit for multiplexing the audio signal, busy signal, and electronic lock signal transmitted by the outdoor unit 100. It has a function as a means. The audio signal separated by the multiplexing/separating circuit 301 is
The signal is applied to a monitor television unit consisting of a video FM demodulator 302 and a monitor television 303. The audio signal separated by the multiplexing/separating circuit 301 is given to an intercom unit consisting of an audio circuit 304, a microphone MIC2, and a speaker SP2. The microphone MIC2 and the speaker SP2 together constitute a telephone receiver. Multiplex/
The calling signal separated by the separation circuit 301 is detected by the calling signal detector 305. Call signal detector 30
5 is formed to detect only the calling signal of the frequency corresponding to each indoor unit 300. The output of the paging signal detector 305 is provided to a control circuit 306. Control circuit 306 drives constant current unit 307 based on the output of call signal detector 305. Constant current unit 3
07 includes a current-voltage converter that converts constant current into constant voltage and outputs it.

Associated with the control circuit 306 is a hook inch 30B in which the handset is placed.

When the hook switch 308 becomes conductive, power is supplied to the monitor television unit and intercom unit of the indoor unit 300.

FIG. 2 shows a more specific configuration of the power supply system in the indoor unit 300 described above.

The control circuit 306 includes a buffer amplifier 306I that amplifies the output signal of the calling signal detector 305, and a buffer amplifier 306. includes a relay 306□ driven by the output of. The constant current separated by the multiplexing/separating circuit 301 is transferred to the constant current unit 30 via the relay contact of the relay 306□.
7 is given.

The output of the constant current unit 307 (which has been converted into a constant voltage as described above) is supplied to the monitor television unit and the intercom unit via the Fuchs inch 308, respectively.

On the other hand, the call signal detector 305 and the busy signal generator 309 (described later) are always powered by a very small amount of power (for example, several mW).
is supplied. Such a small amount of power is supplied by dividing a constant current separated by a multiplexing/separating circuit 301 using a high resistance R, as shown in FIG.

Returning to FIG. 1, the control circuit 306 includes the hook switch 3
08 becomes conductive, that is, the operator of the indoor unit 300 picks up the receiver, and activates the busy signal generator 309. Thereby, the busy signal generator 309 outputs a busy signal to the multiplexing/demultiplexing circuit 301.

Further, in relation to the control circuit 306, an electronic lock button switch 310 is provided. When the electronic lock button switch 310 is pressed by the operator, the control circuit 306 activates the electronic lock signal generator 311. As a result, from the electronic lock signal generator 311 to the multiplexing/separating circuit 3
An electronic lock signal is output at 01. Multiplex/separate circuit 301
The voice signal, busy signal, and electronic lock signal given to the outdoor unit are multiplexed and transmitted to the outdoor unit.

FIG. 3 is an explanatory diagram showing the flow of each signal in the embodiment shown in FIG.

That is, the video signal, audio signal, and call signal multiplexed and transmitted from the outdoor unit 100 are sent to the power supply/repeater 200.
．． 200□, . . . via a pair of communication lines. The call signal transmitted from the outdoor unit 100 is transmitted to the power supply/repeater 200. Indoor unit 300 managed by ,300□
, 3003 . . . , the video signal.

The voice signal and the call signal are each amplified by the power supply/repeater 200°, superimposed with DC power, and then transmitted to the indoor units 3001, 3002, 3003, . . . . On the other hand, the audio signal is multiplexed and output from the indoor unit 300 that received the call.

The busy signal and electronic lock signal are transmitted to the outdoor unit 100 via the power supply/repeater 200.

FIG. 4 shows the frequency spectra of the video signal, audio signal, calling signal, busy signal, and electronic lock signal that are multiplexed and transmitted as described above.

The audio signal is transmitted in baseband and has a frequency of 100Hz to 10k.
It has a spectral component of H2. The frequency modulated video signal has spectral components ranging from IM Hz to 5 MHz. Call signal al + corresponding to each indoor unit 300
a2+ + ”11% bI l bZ-・
・・+ b11% CI I 021 1 Cn
Each frequency is individually assigned between the audio signal and the video signal. Note that the call signal groups a, b, and c shown in the figure are signal groups assigned to a plurality of indoor units on each floor of an apartment complex, and are, for example, the power supply/repeater 200... shown in FIG. is designed to detect the calling signal group a, and the power supply/repeater 200□ is designed to detect the calling signal group a. The frequencies of the busy signal and electronic lock signal are
This is common to all indoor units, and is assigned between the call signal and the video signal.

Next, the operation of the above embodiment will be explained.

FIG. 5 is an operation flowchart shown to facilitate understanding of the operation of the embodiment. This will be explained below with reference to FIG.

Assume that in the standby state (step a), a visitor presses a call button for the destination from among the call button group 104 of the outdoor unit 100 (step b). Then, the calling signal generation circuit 106 is activated, and a calling signal with a frequency corresponding to the indoor unit 300 at the destination is emitted (step C). The call signal generation circuit 106 prohibits other call buttons from being pressed while outputting a certain call signal. As a result, the outdoor unit 1.
By preventing multiple call signals from being output from the OO, communication failure is prevented and confidentiality of the communication is ensured.

The call signal transmitted from the outdoor unit 100 is first sent to the power supply/repeater 200 that manages the indoor unit 300 at the destination.
is detected by the paging signal detector 202 of. As a result, the constant current unit 203 of the power supply/repeater 2°O is driven, and a constant current is output to the communication line.

On the other hand, the call signal transmitted to the indoor unit is detected only by the call signal detector 3.5 of the indoor unit 300 at the destination. As a result, a constant current is supplied to the constant current unit 307 of the indoor unit 300, and the control circuit 306 drives the audio circuit 304 to ring the doorbell (step d).

When the operator of the indoor unit 300 picks up the receiver (step e), the hook switch 308 is turned on and power supply to the monitor television unit and the like is started (step f).

Furthermore, the control circuit 306 operates the busy signal generator 309, and the busy signal is transmitted from the indoor unit 300 to the outdoor unit 100. This busy signal is detected by the busy signal detector 108 of the outdoor unit 100. As a result, the control circuit 105 of the outdoor unit 100 drives the power supply unit 110, and power is supplied to the camera unit and intercom unit of the outdoor unit I00. As a result, the FM-modulated video signal from the camera unit and the audio signal from the intercom unit are respectively given to the multiplexing/demultiplexing circuit 107, where they are multiplexed together with the calling signal and sent to the indoor unit 300 via the power supply/repeater 200. transmitted.

The multiplexed signal transmitted from the outdoor unit 100 is transmitted to the indoor unit 300.
The multiplexing/separating circuit 301 separates the signals.

The separated video signal is demodulated by a video FM demodulator 302 and output to a monitor television 303, so that the visitor's video is displayed on the monitor television 303. The audio signal is given to the intercom unit of the indoor unit 300,
A telephone conversation is made with the visitor (step g).

Then, when the operator of the indoor unit 300 presses the electronic lock button switch 310, the control circuit 306 drives the electronic lock signal generator 311, and an electronic lock signal is issued. This electronic lock signal is multiplexed with a voice signal and a busy signal and transmitted to the outdoor unit 100. When the transmitted electronic lock signal is detected by the electronic lock signal detector 109 of the outdoor unit 100, the electronic lock 111 is opened and the visitor can enter the apartment complex (step h).

When the conversation with the visitor ends and the receiver of the indoor unit 300 is put down, the hook switch 308 turns OFF (
Step i). Then, the supply of power to the monitor television unit and intercom unit is stopped (step j), and the busy signal generator 309 is stopped. When the outdoor unit detects that the busy signal is no longer present, the control circuit 105 stops supplying power to the camera unit, etc. in the outdoor unit, and also stops the call signal generator 106. As a result, the above-mentioned prohibition of attaching the call receiver is canceled, and the outdoor unit 100 returns to the standby state.

By the way, if the operator on the indoor unit side is away even though a call is received from a visitor, the operator on the indoor unit side will not pick up the receiver, so the busy call Σ will continue to be sent to the outdoor unit. Not transmitted to the side. The control circuit 105 of the outdoor unit 100 has a built-in simple electronic timer, and if a busy signal is not detected within a certain period of time after the call signal is issued, it determines that the indoor unit is not home and calls the unit. The operation is reset to return the outdoor unit 100 to the standby state.

In addition, in the above-mentioned embodiment, the outdoor unit 100 and the indoor unit 300
A power supply/repeater 200 was interposed between the two and the signals were relayed. However, this is an outdoor unit 100 and an indoor unit 30.
This is because consideration has been given to the fact that since 0 is located a considerable distance away, signal and power losses due to communication lines will increase. Therefore, when the outdoor unit 100 and the indoor unit 300 are relatively close to each other, the power supply/repeater 200 is not necessarily required. In this case, a constant current unit for supplying power to the indoor unit 300 is provided inside the outdoor unit 100.

In addition, in the description of the embodiment, the outdoor unit 100 was described as being equipped with an electronic lock 111, but the present invention does not necessarily require this, and a doorbell for an apartment complex that is not equipped with an electronic lock is used. Needless to say, it can also be applied to camera systems.

Furthermore, in the description of the embodiment, the constant current unit 307 is driven when the indoor unit detects the ringing signal, and power is not supplied to the monitor TV unit etc. until the telephone receiver is picked up and the hook switch 308 is turned on. I made sure that it was supplied. However, the supply of power to the monitor television unit etc. may take place at the same time as the ringing signal is detected.

(Effects of the Invention) As is clear from the above description, the doorbell camera system for apartment complexes according to the present invention has the ability to combine the outdoor units installed in the population of the apartment complex and the indoor units installed in each household in the apartment complex. Since communication between the two is performed using multiplexed signals, a pair of communication lines can be used as the signal transmission line. Therefore, according to the present invention, it is not necessary to lay a composite cable as in the conventional example, so that the doorbell camera system for an apartment complex can be easily installed. This is especially convenient for apartment complexes that already have intercom equipment installed, as the existing communication lines can be used as is and expanded to a doorbell camera system.

In addition, the present invention superimposes DC power on the communication line using the power supply and supplies power to the indoor unit all at once, so there is no need to connect a power cable to each indoor unit. The installation cost of the doorbell camera system for apartment complexes can be further reduced.

Furthermore, according to the present invention, a specific indoor unit is called by a call signal corresponding to each indoor unit, and only when the call signal is detected by the indoor unit, power is supplied to the monitor TV unit or intercom unit, and the visitor is informed. It is possible to communicate with. Therefore, according to the present invention, other indoor units that are not called by the outdoor unit cannot eavesdrop on the conversation between a visitor and a specific indoor unit, which is convenient for maintaining the confidentiality of the conversation. It is.

[Brief explanation of drawings]

FIG. 1 is a block diagram schematically showing the configuration of a door intercom camera system for apartment complexes according to an embodiment of the present invention, and FIG. 2 shows a specific example of the power supply system for the indoor unit in the embodiment shown in FIG. FIG. 3 is an explanatory diagram showing the signal flow of the embodiment shown in FIG. 1, FIG. 4 is a frequency spectrum distribution diagram of each signal in the embodiment, and FIG. 3 is a flowchart used to explain the operation of the embodiment shown in the figure. 100...Outdoor unit, 200...Power supply/repeater, 30
0...Indoor unit, L...Communication line.

Claims (1)

[Scope of Claims] An outdoor unit installed at the entrance of an apartment complex, a plurality of indoor units installed in each household of the apartment complex, and a pair of indoor units connecting the outdoor unit and each indoor unit. The outdoor unit includes a communication line and a power supply device that supplies DC power to each of the indoor units via the communication line, and the outdoor unit includes a camera unit that photographs the visitor, and a communication line between the visitor and the indoor unit operator. an intercom unit for making calls, a group of call buttons for calling an indoor unit at a visitor's place, a call signal generator that generates a call signal corresponding to the call button pressed by the visitor;
a signal multiplexing means for multiplexing a video signal output from the camera unit, an audio signal output from the intercom unit, and a call signal output from the call signal generator and transmitting the same to the indoor unit; a signal separating means for separating a voice signal and a busy signal from the transmitted multiplexed signal and supplying the voice signal to the intercom unit; a busy signal detector for detecting the busy signal; and a busy signal detector for detecting the busy signal. The power supply unit includes a power supply unit that supplies power to the camera unit and the intercom unit based on an output, and the power supply device includes a constant current unit that superimposes a constant current on the communication line based on a calling operation of the outdoor unit. Each of the indoor units includes a signal separating means for separating the multiplexed signal transmitted from the outdoor unit into a video signal, an audio signal, a calling signal, and a constant current, and a monitor television unit to which the video signal is applied. , an intercom unit to which the audio signal is applied, a calling signal detector for detecting a calling signal corresponding to each indoor unit, and a monitor television unit to which the constant current is applied and based on the output of the calling signal detector. and a constant current unit that supplies power to the intercom unit; a busy signal generator that generates a busy signal based on an operation by an operator of the indoor unit in response to a call from the outdoor unit; A door intercom camera system for an apartment complex, comprising: signal multiplexing means for multiplexing the output audio signal and the busy signal output from the busy signal generator and outputting the multiplexed signal to an outdoor unit.