JPS6051335A - Multichannel interphone system - Google Patents

Abstract

PURPOSE:To reduce wiring by providing a receiving means which superposes a channel selecting address signal onto a low-power AC power supply line to report that a channel corresponding to its own address is called. CONSTITUTION:A carrier wave controlling unit 12 is provided for the low-power AC power supply line and communication lines 11. A power supply part 25 rectifies the AC of said power supply line. A zero crossing pulse is generated and is outputted to a logic control part 22 for timing of transmission and reception. A coupling circuit 26 has a high frequency oscillating part 27 and a switch circuit 28 and outputs a high frequency between terminals (a) and (b). High frequency components transmitted on these lines 11 are detected and are inputted to the logic control part 22. A selecting address is set by a channel setting part 29, and this set data and data of a received channel selecting address signal are compared with each other in a logic control circuit part 24 and a relay driving circuit part 25 are driven to switch communication lines by a changeover switch 13.

Description

[Detailed description of the invention] 〔Technical field〕 be.

[Background technology 1] Conventionally, a common communication device installed in a shared area such as a common entrance or a manager's room in an apartment complex such as a condominium, and an individual communication device installed in each housing unit are connected via a communication line. However, in such conventional examples, as the number of residents increases and the number of individual communication devices increases, the configuration of a switching circuit that switches and connects each individual communication device to a communication line is required. There was a problem that the hx became sloppy.

The present invention has been devised to solve the problem of interlayer points in the conventional example, and is a device for controlling line of force transport.Hereinafter, a fully illustrated embodiment of the present invention will be described. 1st
2 is a schematic diagram of a multi-station intercom system according to an embodiment of the present invention, FIG. 2 is a circuit diagram of a communication circuit in the system, and FIG. 8 is a transport side control unit θ' used in the system I. It is a block diagram of No. 4. The manager's room (1) is equipped with a power transformer (3) connected to an AC power source (2), and the low power AC voltage such as AC24V stepped down by this power transformer (3) is converted into a low power AC voltage. Common entrance (6) and each dwelling unit (61) through power line (4)
(6n).

Each dwelling unit (61) to (6n) has a doorbell senba (7) placed at the doorway, an indoor auxiliary device (8) placed in each room, and an indoor sharp device (9). It is provided. The indoor sub-heater (8) and the indoor sharps device (9) are always connected, and the door hob (7) and the indoor sharps device (9) are connected via a changeover switch (10). Indoor sharps (9)
can also be connected to the telephone line 01) via this changeover switch (IO). Next, the common entrance 5) is provided with an entrance senba (7)', which is connected to the telephone line 0υ via a changeover switch (to) and θ→. Furthermore, in the manager's room 0), there is a manager's room Oyaba 0υ and a handset 0.
(9) and is connected to the telephone line 01) via a changeover switch Q''i).However, each dwelling unit (6□) to (6n) has a small power supply. A transport control unit H connected to the AC power line (4) is provided, and this unit 0 wharf is configured as shown in Fig. 8. In Fig. 8, OI is a power supply section, The AC voltage applied to the low-power AC power supply line f4) is input from the input terminal, full-wave rectified, and the output is stabilized by the built-in stabilized power supply -j lock to create a logic control unit (a) consisting of a microcomputer. , the carrier frequency oscillation circuit section (E), the chime drive circuit section (Foundation), and the relay drive circuit section (C) of the changeover switch (10) are supplied with power +VCC. It has a built-in generation part for 0 Subaru ZP, and outputs it to the logic control part (2) as a signal for setting the transmission and reception ties.The coupling circuit part (
E) has an oscillation section that oscillates a high-frequency signal) and a switch circuit (C), and controls opening and closing of the switch circuit according to the transmission output signal output from the logic control section (A). A high frequency signal (for example, 120
It outputs a sine wave at KH2. This terminal a,
b is not connected to the small power AC power line 01). The coupling circuit section (G) receives and detects the component of the high frequency signal transmitted through the low power AC power line (11) by the pickup capacitor C6 and the tuning coil section LO, and sends the received signal to the logic control section. This is what is entered in (b). The wire is a channel setting section composed of a gap switch, etc., and the channel setting address of the transport control unit 0 is set by the setting of the channel setting section.
The logic control section (a) judges the received channel selection address signal, and if they match, drives the chime drive circuit section (c) and the relay drive circuit section (c), respectively, so that the channel is selected. At the same time, the changeover switch (lO) is switched from the residential door phone Senba (7) - side to the call line 0◇ side, and the indoor sharpener (9) is connected to the call line 0η.

Figures 4(a) and 4(b) show the format of the tuning address signal made of a high-frequency signal used in the present invention, where one hit is a half cycle of the AC power frequency, and the half cycle is divided into one section. As shown in Fig. 4(a), the one-hit signal obtained by superimposing a high-frequency signal on the second interval is set to the logical value "0", and the high-frequency signal is superimposed on the second interval from the 2vth to the fourth consecutive interval. As shown in Figure 4 (b), the superimposed 1-pit signal is combined with a logical value of ``1'', and the signal with these logical values is selected as a signal coded using 8 pits as shown in Figure 5. The t!0 cross pulse ZP is used as a station address signal, and the signal for taking the tie 3-)/) for transmitting these signals is the t!0 cross pulse ZP.

However, the transport side control unit 0 port is for each residential unit (61) ~
(++n), as well as a common entrance (6),
It is also installed in the manager's room (1), and the transport control unit 0 installed at the common entrance (5) and manager's room +1) has an address set in the transport control unit 02 for each dwelling unit. Provided with a selection switch (31) that can be selected separately,
By setting this selection switch, it is possible to select the dwelling unit to be sent and called. On the other hand, the transport control unit ◇ for each dwelling unit is equipped with a response switch that is turned on when it confirms that it has been called.
If you insert +, the common entrance (5) (or ￥? Uto IMf
1+) When the transport control unit is returned to the 0 port,
Select the station and return the NOS signal, turn on the tJ' call confirmation light, and confirm at the common entrance (5) (or manager's room (1)) that the call has been confirmed on the residential unit side. At the same time, the changeover relay RY causes the changeover switch (10), 0
However, from the common entrance (5) via the small power AC power line 0υ, you can call the manager's room (f+) or each residence, and the manager's office can also be called. From room f1+, it is possible to call each dwelling unit, and it is also possible to make calls to and from the common entrance (6). Furthermore, the transport control unit 0 installed in the common entrance (5) and the manager's room (1) is equipped with a call switch corresponding to response switch 2 installed on the residential unit side, and when this call switch is turned on, A predetermined channel selection address signal is transmitted only when the station is in use.

〔Effect of the invention〕

The present invention connects a plurality of telephone devices each having a transmitting and receiving function to a telephone line, and connects them to a small-power AC power line, so that when a partner station calls and selects a station, a plurality of telephone devices having transmitting and receiving functions are connected to a telephone line, and when the other station is called and selected, time-discrete communication is performed in synchronization with an AC voltage waveform. Encoding using a high frequency signal consisting of a sine wave [7
A transport control unit comprising a transmitting means for superimposing a channel selection address signal on a small power AC power line, and a receiving means for notifying that a call has been made when receiving a channel selection address signal corresponding to its own address. Since each communication device is provided with a power supply, the small power AC power line that supplies power to each communication device can be used to transmit the channel selection att/o signal, which saves wiring. Since the channel selection attribution signal at the time of a call is a sine waveform and is only transmitted when a channel is selected, the effect is that there is no noise during a call.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram of a multi-station intercom system according to an embodiment of the present invention, FIG. 2 is a circuit configuration diagram of a communication circuit in the system, and FIG. 8 is a circuit block diagram of a transport control unit used in the system. , Figure 4(a),(b)
5 is an explanatory diagram of the format of the channel selection address signal used in the above. (4) is a telephone line, (6,) to (6n) are telephone devices, 0
1) is a small power AC power line, and 0 is a transport control unit. Daikonto, 11f Rishi Ishi 1) Chief 7th Figure 4 (0) Figure 5 (b)

Claims (1)

[Claims] (1) A plurality of telephone devices each having a transmitting and receiving function are connected to a telephone line, and connected to a small-power AC power line, and when the other station is called and selected, it can transmit temporally discrete signals in synchronization with the AC voltage waveform. Transmitting means for superimposing a channel selection address signal coded using a high frequency signal consisting of a sine wave on a small power AC power line, and receiving a channel selection address signal corresponding to its own address to notify that it has been called at 18:00. A multi-station intercom system in which each communication device is provided with a transport control unit comprising a receiving means for notifying the user.