JPS5910838Y2 - emergency alarm communication device - Google Patents

Description

[Detailed description of the invention] This invention utilizes a CATV coaxial cable network to select a large number of intercom handsets to be installed on each subscriber's side from the central part of the cable network, and install them in the central part. This invention relates to an emergency alarm communication device that enables mutual communication with an intercom base unit.

This type of device is used in the event of an emergency such as an accident or fire. For example, if there are multiple elevators in one building, or if there are several such buildings, any When an accident occurs and there is a display or alarm on the central monitoring device in the monitoring building, the central monitoring device is used to communicate with the intercom handset installed in the elevator car that caused the accident. It is something that can be done.

Even in this example, if the number of elevators to be managed, that is, the number of intercom slave units, is very large, multiple intercom base units may be installed in the monitoring building to prevent accidents.
It is necessary to enable mutual communication with a plurality of intercom handsets at the same time.

Such a case can be dealt with by changing the audio carrier frequency for each intercom handset, but if a modulator and demodulator are installed for each intercom handset, the number of modulators and demodulators will be It becomes enormous and lacks practicality.

Additionally, this type of device requires the following:

In other words, when selecting from a large number of intercom handsets, it is necessary for the intercom handset to be able to talk to any intercom base unit, and also for the intercom base unit to be able to communicate with any intercom base unit. It is necessary to be able to select the intercom handset.

Furthermore, in order to manage a large number of residential buildings in an apartment complex, etc., if a residential building monitoring station is set up in each residential building and an intercom is also installed there, in addition to the intercom base unit and intercom slave unit, the intercom base unit It is also necessary to communicate between the aircraft and the intercom at the residential building monitoring station (intercom residential unit), or between the intercom residential unit and the intercom unit.

This invention provides an emergency alarm communication device that utilizes a CATV coaxial cable network and satisfies the above requirements.It does not require a modem to be installed on each intercom slave unit, and the intercom base unit side The present invention aims to provide an emergency alarm communication device in which a selection control signal is sent from the intercom base unit to the intercom handset side, and the switching device is actuated by the control signal to put the intercom base unit and a desired intercom slave unit in a state where communication is possible. .

In other words, the emergency alarm communication device of this invention divides the intercom handsets installed in multiple neighboring subscriber homes into a group into multiple blocks, and uses the CAT
In order to transmit audio signals via the V coaxial cable network, each block shall be equipped with the same number of modems as the intercom base units installed at the core of the coaxial cable network.
The high frequency carrier frequency of these modulators is common to each block.

Then, when the modem and the intercom handset are connected via a switch, and a selection control signal is sent from the interphone base unit via the CATV coaxial cable network, the contacts of the corresponding switch are closed. The intercom base unit and a desired intercom slave unit communicate with each other, and the interphone base unit is equipped with a modulator/demodulator corresponding to the above-mentioned modulator/demodulator, thereby enabling communication between the two.

This invention will be explained in detail below along with the drawings of the embodiments.

FIG. 1 is a block diagram showing the overall structure of an emergency alarm communication device according to an embodiment of this invention, in which 1 is a communal reception antenna, 2 is a head end, 3, 4, 5a, 5b, 6a, 6
b are coaxial cables that each constitute a CATv coaxial cable network.

That is, in FIG. 1, antenna 1 and head end 2
and coaxial cables 3, 4, 5a, 5b, 6a, 6b,
Main line amplifiers 7a and 7b provided between cables 4 and 5a and cables 4 and 5b, distributors 8a and 8b connected to cables 6a and 6b, respectively, and series units }9a and 9b from each distributor, respectively. The television receivers 10a, 10b connected through the two buildings 11a, l
A joint reception system with LB has been established.

The emergency alarm communication device of this invention using this joint reception system assumes that one building 11a has four elevators and the other building 11b has two elevators. It is assumed that an intercom is installed for communication in an emergency, and two intercom base units 13 are installed in the monitoring building 12, which is the central part of the system.
A, 13 B, a modulator/demodulator 14 for transmitting and receiving audio signals of this intercom base unit, and residential buildings 11 a, 1
A selection signal generator 15 that emits a control signal for selecting the intercom handset of 1b, and the residential buildings 11a and 11b.
Signal separation mixer 16 that separates and combines the transmitted and received signals with the side
The end of the coaxial cable network is equipped with television signals to be transmitted from the head end 2 to the cable 4, transmission and reception between the monitoring building 12 and each housing building 11a and 11b, and signals (emergency contact signals). A signal separation mixer 17 is provided which separates and combines signals using a filter etc.
, 11b side includes signal separation/mixers 18a and 18b for separating and mixing the television signal transmitted from cable 5a to 6a or 5b to 6b and the emergency communication signal, and the above-mentioned selection control of the emergency communication signal. Switching controllers 19a and 19b that operate desired relays depending on the signal, modulators 20a and 20b that are connected to the signal separation mixers 18a and 18b and modulate and demodulate emergency communication signals, and modulators and intercom handsets 22a1 to 22a1. 22a4, 22bt, 22
switching devices 21a, 21b which are connected between the switching controllers 19a, 19b and the desired intercom handsets 20a, 20b and the intercom handsets 22a1 to 22a4, 22b. ，
22b2, and an intercom subunit 23a that is connected to the changeover devices 21a and 21b and enables mutual communication between the intercom base unit and the intercom subunit by switching a changeover switch (not shown). , 23b.

Note that bidirectional two-branch amplifiers are used as the above-mentioned trunk amplifiers 7a and 7b.

A more detailed structure of each device in the above-mentioned monitoring building 12 is shown in FIG. 2, and a more detailed structure of each device below the signal separation/mixer 18a in the residential building 11a is shown in FIG. .

In the illustrated embodiment, there are two buildings with four elevators and two elevators, respectively. Needless to say, the invention is not limited by the number of buildings, the number of elevators, or the application of elevators, and can be applied to any device for emergency communication.

In FIG. 2, the modem 14 includes two modulators 26A, 26B and demodulators 27A, 2, which are the same number as the intercom base unit.
7B, the modulators 26A and 26B are given respective high frequency carrier frequencies F1 and F2, which are modulated by the audio signals of the intercom base units 13A and 13B.

The demodulators 27A and 27B separate signals of frequencies F3 and F4 corresponding to the carrier frequency using band pass filters, respectively, and send the signals to the intercom handsets 22a1 to 22a.
Extract the audio signal from 4.

The selection signal generator 15 outputs a signal from the encoder to a certain selection operation section 2.
4A, 24B and oscillators 25A, 25B.

As the number of intercom slave units increases, the number of signals increases, the frequency band used for transmission expands, and the number of control devices also increases, so in order to reduce the number of signals, The number of the intercom cordless handset is converted into a binary code signal by the encoder of the selection operation parts 24A, 24B, and when the binary code signal has n digits, the oscillators 25A, 25B have n oscillation frequencies fA1 to f.
Prepare An, fBl to fBn, and the signal of the corresponding digit is "
1" signal, the corresponding frequency can be transmitted.

On the receiving side, as will be described later, a "0" or "1" signal is obtained depending on the presence or absence of the frequency of the corresponding digit, which is converted into the original signal by a decoder and operates the relays of the switching controllers 19a and 19b. The structure is as follows.

The signal separation/mixer 16 includes a signal separation/mixer 28 that separates and combines transmission signals, a signal separation/mixer 29 that separates and combines reception signals, and a signal separation/mixer 30 that separates and combines transmission and reception signals.

In FIG. 3, the signal separation/mixer 18a is a signal separation/mixer 31 that separates and combines transmitted and received signals, and a signal separation/mixer 31 that separates and combines received signals.
It consists of a signal separation/mixer 32 for combining, and a signal separation/mixer 33 for separating and combining transmitted and received signals.

The switching controller 19 controls the oscillation frequency f of the oscillators 25A and 25B.
A demultiplexer 34 demultiplexes each frequency corresponding to Al~fAn, fBI~fBn using a bandpass filter or the like, and detects and smooths the output of this demultiplexer, and then sends r1, r, and 2 of the signals via a switching element. Detector 35 that returns the signal to a binary code signal
, this binary code signal? A decoder 36 that returns the signal to the original binary signal, and relays Ra1 to Ra4, Rb1 to
It is composed of Rb4.

The modulator/demodulator 20a includes demodulators 37A and 37B that demodulate the received signal among the transmitted and received signals from the signal separation/mixer 18a.
, and modulators 38A, 38B that modulate the transmitted signal.
37A, 37B are the modulators 26A, 26B of the modem 14, and 38A, 38B are the demodulators 27A, 2.
Corresponds to 7B.

The switch 21 a is the relay Ra1 of the switch controller 19 a.
When the contacts a1 to a4, b1 to b4, which are controlled to open and close by the Ra4, Rb1 to Rb4 ON/OFF control, are closed, for example, when the contact a1 is closed by the ON operation of the relay Ra1, the demodulator 37A → contact a1 → intercom slave unit 22a
A circuit 1→contact a→modulator 38A is established, and mutual communication with the intercom base unit 13A becomes possible.

The terminal of the switch 21a is connected to each intercom handset 22a1~
In addition to being connected to 22a4, it is also selectively connected via a selection switch 39 to an intercom housing unit 23a provided at a housing monitoring station that manages each housing building.

Note that although we have explained the case of residential building 11a here,
Residential building 11b has a similar arrangement, only with fewer intercom handsets.

In the above-mentioned arrangements for each part, for example, the monitoring building 12 and the living building 1
The operation of this device when there is an emergency alarm indicating that a failure has occurred in the second elevator of 1a is shown in Figures 1 to 3.
The explanation is as follows with reference to figures.

First, the manager selects the selection signal generator 15 and selects the selection operation device 24A.
When the number of the intercom handset 22a2 of the elevator car in question is specified by operating , the number is converted into a binary code signal by the encoder in the selection controller.

For example, if the corresponding number is "A2", the output of the selection operator 24A will be a "1" signal for only the second digit and "0" signals for all other digits.

This binary code signal causes the oscillator 25A to send the corresponding frequency fA signal to the coaxial cable 4 via the signal separation/mixers 29, 30 and another signal separation/mixer 17.

The frequency fA signal sent to the coaxial cable 4 is guided to the signal separation mixer 18a via the main amplifier 7a and the coaxial cable 5a, and further to the signal separation mixer 31. 32 to the switching control 19a.

Only the frequency fA signal passes through the duplexer 34 of the switching controller, is detected and smoothed by the detector 35, and is sent to the selection controller 24.
It is returned to the same binary code signal as the output of A.

This binary code signal is converted into the original designated number "A2" by the coder 36, and a relay Ra2 (not shown) is operated.

This operation of relay Ra2 closes contact a2, forming a circuit of demodulator 37A → contact a2 → intercom handset 22a2 → contact a2 → modulator 38, and the audio signal from intercom base unit 13A is input to modulator 26A. , the signal separation mixer 28, as in the case of the selection control signal described above, as the modulation signal of the carrier frequency F1 given to the modulator.
30, another signal separation mixer 17, coaxial cable 4, mains amplifier 7a, coaxial cable 5a and signal separation mixer 3
1. 32, the signal is guided to a demodulator 37A.

An audio signal is extracted by this demodulator and can be listened to by the intercom handset 22a2.

On the other hand, the audio signal of the intercom handset 22a2 is transmitted to the modulator 38.
A is sent out as a modulated signal of carrier frequency F3, and is guided to another signal separation mixer 16 via signal separation mixers 33, 31, coaxial cable 5a, main amplifier 7a, coaxial cable 4 and signal separation mixer 17. It will be destroyed.

Signal separation mixer 30 in the same signal separation mixer. The modulated signal led to the demodulator 27A via the intercom base unit 13A is demodulated to extract the audio signal, which can be heard on the intercom base unit 13A, allowing mutual communication between the intercom base unit 13A and the intercom slave unit 22a2. becomes possible.

In addition, since the intercom subunit 23a is connected in parallel to each of the intercom subunits 22a1 to 22a4 via the selection switch 39, by appropriately selecting the selection switch, the intercom base unit 13A and the intercom subunit 22a2 and the intercom unit 23a can communicate with each other.

In this case, when an accident or the like occurs in the elevator, an alarm may be issued to the residential building monitoring station, or the operation relay of the switching controller 19H may be recognized so that the selection switch 39 can be switched.

Even if there is another alarm while talking on the intercom base unit 13A, it is possible to make a call to the place where the accident occurred in the same way by operating the selection controller 24B.

Further, even if an accident occurs in the residential building 11b, this device operates in the same manner as in the case of the residential building 11b described above.

As described above, this invention satisfies various requirements as an emergency alarm communication device, and at the same time, by inserting the above-mentioned switch in each block on the terminal side, it is possible to selectively switch between the modem and the intercom handset from the monitoring building side. Since the number of modulators and demodulators in each block can be the same as the number of intercom base units, or the number can be significantly reduced, it is extremely useful in practice.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing the overall structure of an embodiment of this invention, Fig. 2 is a block diagram showing the structure of an embodiment on the surveillance building side, and Fig. 3 is an example of an embodiment on the residential building side. FIG. Note that the same reference numerals indicate the same or equivalent parts. 1...Antenna, 2...Head end, 3, 4, 5a, 5b, 6a, 6b...-coaxial cable, 7a, 7b...Main amplifier, 8a
, 8b...Distributor, 9a, 9b...Series unit, 11a, 11b...Dwelling building, 12.
... Monitoring building, 13A, 13B ... Intercom main unit, 14, 20 a, 20 b ...
・Modulator/demodulator, 15... Selection signal generator, 16,
17, 18 a, 18 b... Signal separation mixer, 19a, 19b... Switching controller, 21
a, 21 b...Tune switch, 22 a1-22 a
4, 22 b1, 22 b2 = intercom handset,
23a, 23b... Intercom housing unit.

Claims (1)

[Claim for Utility Model Registration] A large number of intercom handsets installed at each subscriber side using a CATV coaxial cable network and a signal separation mixer that separates and mixes TV signals and intercom audio signals, etc. , an emergency alarm communication device that allows mutual communication by selecting one of a plurality of intercom base units installed at the core of the above cable network, which connects multiple subscriber homes adjacent to the above CATV coaxial cable network. are divided into a plurality of blocks as a group, and in each block, the same number of common modulators and demodulators as the number of intercom base units are installed for each block that transmits intercom audio signals via the coaxial cable network, and these A switch is provided to connect a plurality of sets of modems to any intercom handset in the block in response to a selection control signal from the intercom base unit, and the intercom base unit is equipped with a switch corresponding to the above-mentioned modulator/demodulator. An emergency alarm communication device comprising: a modulator/demodulator connected to an intercom base unit; and a selection signal generator that issues the selection control signal unique to each interphone base unit to the corresponding interphone slave unit.