JP2964089B2 - Intercom system with wireless electric lock system - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an intercom system characterized by adding a wireless electric lock system.

[Prior art] This type of intercom system will be described using a TV intercom system as an example. In order to make it possible for a visitor to be visually recognized indoors, a TV camera is installed on the intercom slave unit installed at the entrance. A monitor TV is provided on the side of the main unit of the intercom installed in the room so that the image can be displayed simultaneously with the call. As shown in FIG. 6, an intercom having the monitor TV TV installed in the room is provided. The main unit 100 is configured by combining an intercom slave unit 200 having a television camera TVC installed at the entrance, connected by a multiplex transmission line 1 such as a coaxial cable,
Power is supplied to the slave unit 200 from the master unit 100 side, and multiplex transmission of video, audio, and control signals is performed to communicate necessary information.

A more specific configuration will be described.
0 is a DC power source E for supplying a constant current to the slave 200, a constant current circuit 106, and a call signal for demodulating an FM modulated wave of a call signal transmitted in response to operation of a call button on the slave 200. Demodulation circuit
104, a call signal amplifying circuit 105 for amplifying the demodulated ringing tone and generating a ringing tone from the speaker SPA, a handset H
FM modulation circuit 101 that FM-modulates an audio signal from the FM receiver, an FM demodulation circuit 102 that demodulates an FM signal transmitted from the slave 200 and extracts an audio signal, and amplifies a video signal transmitted from the slave 200. Signal amplifier circuit 10 to output to monitor TV TV
7, and the FM modulation signal output from the FM modulation circuit 101 and the DC voltage supplied from the constant current circuit 105 are superimposed on the multiplex transmission line l, and transmitted from the slave 200 through the multiplex transmission line l. The configuration includes a signal superposition / separation circuit 103 that separates and outputs an FM modulation signal, a modulated calling signal, and a video signal.

On the other hand, intercom slave device 200 includes an FM demodulation circuit 201 that demodulates an FM modulation signal sent from master device 100 and outputs audio from speaker SPB, an FM modulation circuit 202 that FM-modulates an audio signal from microphone M, A call signal generation circuit 203 for generating a call signal in response to operation of a call button SW, a call signal modulation circuit 204 for FM modulating the call signal, a video signal amplification circuit 207 for amplifying a video signal of the television camera TVC, and FM modulation The FM modulated signal output from the circuit 202, the modulated calling signal output from the calling signal modulation circuit 204, and the video signal amplification circuit 207.
A signal superimposing / separating circuit 205 for superimposing the video signal output from the multiplex transmission line l and separating and outputting the FM modulated signal transmitted via the multiplex transmission line l; The power supply separation circuit 206 for separating and outputting the DC power transmitted by being superimposed on the modulation signal from the master device 100 side via the circuit 205 and supplying the power to the internal power supply of the slave 200 and the TV camera TVC. It is provided with a configuration.

In this television intercom system, as shown in FIG. 7, the first carrier frequency of the FM modulated wave (master device modulated wave) sent from master device 100 to slave device 200 and the FM frequency sent from slave device 200 to master device 100. The second carrier frequency of the modulated wave (slave device modulated wave) and the third carrier frequency of the paging signal modulated wave are selected to be higher than the video signal frequency band of the television camera transmitted in the baseband in order to prevent interference. Thus, the multiplex transmission line 1 is multiplex-transmitted.

In the TV intercom system having such a configuration,
Since the system can be configured only by laying a pair of multiplex transmission lines 1 between the parent device 100 and the child device 200, construction is easy.

In addition to such an intercom system, a wireless electric lock system has been developed and used in which an electric lock provided at an entrance or the like is unlocked by a radio signal output from a wireless transmitter recently. Are coming.

FIG. 8 is a block diagram showing a basic configuration of such a wireless electric lock system, and shows a wireless transmitter.
When the operation switch 303a of 303 is operated, control data including a unique ID code is output in the form of a radio signal, and the radio signal is received and demodulated by the wireless reception demodulation unit 302. To send to. In the electric lock control panel 301, the ID code and ID of the demodulated control data
The ID code set by the code setting unit 301a is compared and determined by an ID code match determination circuit 301b, and when these ID codes match, a match determination signal is output to an electric lock control circuit 301c to control the electric lock control. The circuit 301c is configured to apply and unlock the electric lock 300 according to the control data.

Therefore, if such a wireless electric lock system is used, the electric lock 300 attached to the entrance or the like can be easily unlocked only by operating the wireless transmitter 303.

However, in the case where the TV intercom system and the wireless electric lock system are installed at the same time, as shown in FIG. 9, the intercom slave unit 200 and the wireless reception demodulation unit 3 are installed at the entrance, for example.
02, respectively, while the intercom master unit is on the indoor side.
100 and an electric lock control panel 301 are installed, respectively, and the slave 200 and the master unit 100 are connected by the multiplex transmission line l. The transmission line l1 is laid, and the electric lock
It was configured to lay wiring.

For this reason, the wireless electric lock system and the TV intercom system are merely provided side by side, and a large amount of mounting space is required, which makes the appearance inferior. Was.

[Problems to be Solved by the Invention] The present invention proposed in view of the above situation has a wireless reception demodulation unit of a wireless electric lock system built in a slave unit of an intercom system, and an electric lock of the electric lock is connected to a multiplex transmission line of the intercom system. The purpose of the present invention is to provide an intercom system to which a wireless electric lock system is added, in which mounting space is reduced and appearance is improved by superimposing and transmitting control data, and installation and wiring are reduced to facilitate installation. And

[Means for Solving the Problems] The present invention according to claim 1 proposed to achieve the above object is to supply power to an intercom slave unit from an intercom master unit interconnected by multiple transmission lines. In response to a call from the intercom slave unit, a combination of an intercom system enabling a call, a wireless transmitter for operating an electric lock, and an electric lock control panel connected to the intercom master unit. The intercom slave unit is configured to receive control data including an ID code transmitted in the form of a wireless signal from a wireless transmitter, receive and demodulate a wireless reception demodulation unit, and modulate the demodulated control data. A control data modulation circuit for sending out to a multiplex transmission line, wherein the intercom master unit demodulates modulated control data transmitted through the multiplex transmission line. A control data demodulation circuit that outputs the control data to the electric lock control panel.The electric lock control panel checks the control data including the ID code output from the intercom master unit with an ID code registered and set in advance. When the agreement is confirmed, the electric lock is unlocked.

According to the present invention, the intercom master unit further includes a monitor television, while the intercom slave unit further includes a television camera, and the interphone master unit and the interphone slave unit are connected by a multiplex transmission line. Then, at least a video signal, an audio signal,
A television intercom system is configured to transmit a call signal while superimposing the voice signal on the power source while transmitting the call signal from the master unit to the slave unit at least.

[Operation] In the first aspect of the present invention, when the operation switch of the wireless transmitter is operated, control data including a unique ID code is output in the form of a wireless signal. This wireless signal is received and demodulated by the wireless reception demodulation unit of the intercom slave unit,
The demodulated control data is modulated by a carrier of a specific frequency in a control data modulation circuit, input to a signal superposition / separation circuit, and output from the signal superposition / separation circuit to the intercom master unit via a multiplex transmission line.

On the intercom master unit side, the modulated control data transmitted via the multiplex transmission line is separated by the signal superposition / separation circuit and output to the control data demodulation circuit. Send to control panel.

Upon receiving the control data, the electric lock control panel compares and determines the ID code of the control data with the ID code preset and registered in the electric lock control panel. A coincidence determination signal is output to unlock the electric lock.

According to the second aspect of the present invention, the intercom system according to the first aspect is constituted by a television intercom system, and a video signal output from a television camera of a slave unit is transmitted via a multiplex transmission line. The point that transmission is performed to the device side and an image is displayed on a monitor television provided in the master device side is added, and the operation of the wireless electric lock system is the same as the present invention described in claim 1 above. .

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of the present invention as set forth in claim 1. In FIG.
200 is different from the conventional configuration in that the wireless reception demodulation unit 1 and the control data modulation circuit 2 are incorporated and the operation of the signal superposition / separation circuit 3 is changed.
100 differs from the conventional configuration in that the control data demodulation circuit 5 is incorporated in the conventional configuration and the operation of the signal superposition / separation circuit 4 is changed. ing.

In this system, the operation of the intercom system is completely the same as the conventional operation, so that the description will be omitted, and the operation of the wireless electric lock system will be described.

When the operation switch 303a of the wireless transmitter 303 is operated, control data including a unique ID code is output as a radio signal. This radio signal is received and demodulated by the wireless reception / demodulation unit 1 of the intercom slave unit 200, and the control data including the demodulated ID code is modulated by the control data modulation circuit 2 at a specific frequency described later and transmitted to the signal superposition / separation circuit 3. Is output.

The signal superposition / separation circuit 3 further has a function of receiving the modulated control data and sending it out to the multiplex transmission line l in addition to the function of the conventional signal superposition / separation circuit. The output modulated control data is transmitted to master device 100 side via multiplex transmission line l.

On the master device 100 side, the modulated control data transmitted via the multiplex transmission line 1 is received by the signal superposition / separation circuit 4,
The signal superposition / separation circuit 4 further has a function of separating and outputting the modulated control data in addition to the function of the conventional signal superposition / separation circuit. The data is separated and output by the signal superposition / separation circuit 4 and sent to the control data demodulation circuit 5. The control data demodulation circuit 5 demodulates the control data and outputs it to the electric lock control panel 301 via the control data terminal T3.
After it is determined that the ID codes match in 01, an unlock signal is output to the electric lock 300.

FIG. 2 shows the frequency spectrum of each signal flowing on the multiplex transmission line 1 of the above-mentioned system.
A modulated wave modulated by a first carrier having a frequency f1 at 1;
The slave unit modulated wave is a modulated wave obtained by modulating the audio signal output from the microphone M with the second carrier having the frequency f2 in the FM modulation circuit 202, and the ringing signal modulation wave is output from the ringing signal generation circuit 203 by operating the ringing switch SW. FIG. 3 shows a modulated wave obtained by modulating a paging signal with a third carrier having a frequency f3 in a paging signal modulation circuit 204, and a control data modulation wave is a control data modulation circuit Are modulated waves modulated by a fourth carrier having a frequency f4, and these modulated waves having different frequencies are multiplex-transmitted onto one multiplex transmission line l without mutual interference.

Therefore, according to the system of the present invention, since the slave unit 200 has the built-in wireless reception demodulation unit 1, only the slave unit 200 needs to be attached to the front door or the like, and the installation space is reduced and the appearance is improved. Is done. In addition, since control data is superimposed and transmitted on the multiplex transmission line 1 laid between the slave unit and the master unit, the number of multiplex transmission lines is reduced, and the installation work is facilitated.

Next, FIG. 3 is a block diagram showing a configuration diagram of the present invention according to claim 2, and is different from the system according to claim 1 in that the intercom system is a television intercom system. Also, since this television intercom system has the same configuration as that of the related art, the same portions are denoted by the same reference numerals and description thereof will be omitted.

FIG. 4 shows the frequency spectrum of each signal flowing on the multiplex transmission line 1 of this system.
The difference from the present invention described in the above is that the video signal transmitted from the slave 200 to the parent device 100 is transmitted in baseband, in this manner, the video signal of a wide frequency band is modulated. It is possible to transmit efficiently without having to do it.
The other signals are the same as in the case of FIG. 2 and the description is omitted.

FIG. 5 shows a basic configuration of such a system, in which an intercom cordless handset 200 provided with a wireless reception demodulation unit 1 provided at the entrance and a base unit 100 provided indoors.
Are connected by a multiplex transmission line l, and
It is only necessary to connect the wiring for transmitting control data to 01, which saves space and improves the appearance. In addition, the installation of wiring from the entrance to the room is only a multiplex transmission line l, so construction is easy. become.

In the above embodiment, the wireless output output from the wireless transmitter is described as a radio signal, but it may be configured by an optical signal, a sound signal, or the like.

[Effect of the Invention] According to the present invention described in claim 1, a wireless reception / demodulation unit of a wireless electric lock system is built in a slave unit of an intercom system, and control data of the electric lock is superimposed on a signal of the intercom system. By transmitting
It is possible to provide an intercom system to which a wireless electric lock system is added, in which an installation space is reduced, an appearance is improved, and wiring is facilitated.

According to the second aspect of the present invention, it is possible to provide an intercom system to which a wireless electric lock system is added, which has the same effect as the intercom system according to the first aspect as a television intercom system.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a system configuration of the present invention described in claim 1, FIG. 2 is a frequency spectrum diagram of a signal transmitted on the multiplex transmission line, and FIG. FIG. 4 is a block diagram showing a system configuration of the invention, FIG. 4 is a frequency spectrum diagram of a signal transmitted on the multiplex transmission line, FIG. 5 is an explanatory diagram showing the system configuration, and FIG. FIG. 7 is a frequency spectrum diagram of a signal transmitted on the multiplex transmission line, FIG. 8 is a block diagram showing a configuration of a conventional wireless electric lock system, and FIG. It is explanatory drawing which showed the installation state of the wireless electric lock system and the intercom system. [Explanation of Codes] 1 Wireless reception demodulation unit 2 Control data modulation circuit 3 Signal superposition / separation circuit (slave unit side) 4 Signal superposition / separation circuit (base unit side) 5 Control data demodulation circuit 100 intercom master unit 200 intercom slave unit 300 electric lock 301 electric lock control board 303 wireless transmitter l multiple transmission line TV monitor TVC TV camera

Claims (2)

(57) [Claims] An intercom system in which power is supplied to an intercom slave unit from an interphone master unit interconnected by a multiplex transmission line, and a call is made possible in response to a call from the interphone slave unit, and an electric lock. , And an electric lock control panel connected to the intercom master unit. The intercom slave unit is an ID code transmitted in the form of a radio signal from the wireless transmitter. And a control data modulation circuit for modulating the demodulated control data and sending it out to a multiplex transmission line, wherein the intercom master unit is a multiplex transmission line. A control data demodulation circuit that demodulates the modulated control data transmitted through the control pad and outputs the demodulated control data to the electric lock control panel. Output from the intercom master unit
An intercom system to which a wireless electric lock system is added, in which control data including an ID code is collated with an ID code registered and set in advance, and when the coincidence is confirmed, the electric lock is unlocked. 2. The intercom master unit further includes a monitor television, while the intercom slave unit further includes a television camera, and the interphone master unit and the interphone slave unit are connected by a multiplex transmission line. A television interphone system configured to transmit at least a video signal, an audio signal, and a calling signal to the parent device while superimposing the audio signal on the power source while transmitting the video signal, the audio signal, and the calling signal while superimposing the audio signal. An intercom system to which the wireless electric lock system according to claim 1 is added.