JPH0379758B2 - - Google Patents

Description

Detailed Description of the Invention: [Detailed Description of the Invention] The present invention is a system in which a central receiver receives and confirms an alarm signal from a repeater that notifies an emergency situation such as a fire or gas leak in a dwelling unit, and then sends an alarm to the dwelling unit with a return signal from the central unit. The present invention relates to a reception/response device for alarm equipment that makes a device sound.

2. Description of the Related Art Conventionally, as a reception response device for this type of alarm equipment, there is one shown in FIG. 1, for example.

In FIG. 1, 1 is a receiver, and receiver 1
Signal lines L ₀ , L ₁ and common lines C ₀ , C ₁ , C ₂ are drawn out from the terminal and connected to the repeater 2 . 3 is a detector for detecting fire, gas leak, etc., and is connected to the repeater 2. A current detection circuit consisting of resistors R ₁₁ to R ₁₃ and transistor Q ₁₁ of repeater 2 detects the line current used to operate sensor 3 and energizes relay 21 . A contact 21a of the relay 21 energizes a relay 24 of the receiver so that alarms 25 and 26 of the receiver sound when the relay contact 24a is closed. At the same time, the alarms 22 and 23 of the repeater are configured to sound when the relay contact 24b is closed. Note that E ₀ is a power supply, and 27 is a recovery switch.

Its operation is such that when sensor 3 is activated due to an emergency situation, the current detection circuit detects the line current, transistor Q ₁₁ is turned on, and relay 2 is activated.
1 is driven, and an alarm signal is transmitted to the receiver 1 by closing the relay contact 21a. Inside the receiver, a relay 24 receives the alarm signal from the repeater 2. The buzzer 2 is activated by closing the relay contact 24a.
5. Drive the warning light 26 to issue an alarm in the receiver. At the same time, by closing the relay contact 24b, an alarm signal is sent back to the repeater 2, and the alarm light 23 and buzzer 22 in the dwelling unit that sent the alarm signal are sounded to issue an alarm.

By the way, in the case of such a conventional alarm reception response device, after confirming the above-mentioned alarm signal with the signal lines L ₀ , L ₁ and C ₀ that transmit the alarm signal from each dwelling unit to the receiver, the alarm is output. Further signal lines _C1 and _C2 were required in order to send the alarm signal back to the repeater in the dwelling unit that transmitted the alarm and to sound the alarm in the dwelling unit.

This has resulted in the problem that the signal line installation work is complicated and difficult, and the equipment cost is also high.

The present invention has been made in view of these problems.The receiver converts the alarm signal voltage from the dwelling unit into voltage using a constant voltage element, and then sends the converted voltage signal back to the dwelling unit. It is an object of the present invention to solve the above-mentioned problems by providing a reception and response device for alarm equipment that is capable of receiving and responding through a signal line.

The present invention will be explained below based on the drawings.

FIG. 2 is a circuit diagram showing an embodiment of the present invention.

First, the configuration will be explained. 1 is a receiver, and a pair of signal lines L and C are drawn out from the receiver 1 and connected to a repeater 2. 3 is a detector for detecting fire, gas leak, etc., and is connected to the repeater 2.

Next, to explain the configuration of the repeater 2, first, the positive side of the repeater power supply E ₁ is connected to the emitter of the transistor Q ₁ , forming a current detection circuit together with the resistors R ₁ to R ₃ , and the sensor 3 is activated. Transistor _Q1 is turned on by detecting the line current flowing when the impedance between the signal lines 1 to 1c is low. A relay ₁₁ , a buzzer 12, and a warning light 13 are connected to the collector of the transistor Q1, so that when the transistor _Q1 is turned on, the relay 11 is activated. Further, when the light receiving element PC ₂ receives light and conducts it, the buzzer 12 and the warning light 1 are activated.
The alarm load of No. 3 is connected to ground.

The relay contact 11a of the relay 11 is a Zener diode ZD ₂ between the pair of signal lines L and C from the receiver.
connected via. Also a zener diode
A circuit in which a resistor _{R6 ,} a Zener diode _ZD1 (first constant voltage element), and a resistor _R7 are connected in series is connected in parallel with ZD2, and a Zener diode _ZD1 and a resistor _R7 are connected in parallel.
The connection point with is connected to the base of transistor _Q3 . Here Zener diodes ZD ₁ and ZD ₂
The zener voltage is selected so that E ₂ > ZD ₂ > ZD ₁ compared to the power source E ₂ of the receiver. The collector of transistor Q ₃ is connected to the base of transistor Q ₂ , and when transistor Q ₃ is turned on, the transistor turns on.
Q ₂ is cut off, while transistor Q ₃ is turned off and transistor Q ₂ is turned on through resistor R ₄ .
It is configured to drive the light emitting element PC ₁ to emit light. Furthermore, since the Zener diode ZD ₁ is conductive due to the voltage from the receiver power supply E ₂ in the steady monitoring state, the transistor Q ₃ is also conductive.
Resistors R ₅ , R ₆ , and R ₇ are configured with high impedance so that the circuit current at this time is so small that it does not operate the transistor Q ₄ provided in the receiver.

Next, receiver 1 will be explained.

Resistors R ₈ , R ₉ , R ₁₀ are installed on the signal line L side.
and a current detection circuit consisting of a transistor Q ₄ and a Zener diode ZD ₂ provided in the repeater 2.
The line current flowing through the circuit is detected and transistor _Q4 is turned on. The transistor _Q4 is connected to the relay 14 as a collector load, and the relay 14 is operated when the transistor _Q4 is turned on. Relay contact 14a of relay 14
is interposed in the alarm drive circuit of the buzzer 15 and alarm light 16, and when the relay contact 14a closes, the buzzer 1
5. Drive the warning light 16. Also, relay contact 1
4a has diode D and Zener diode ZD ₃
(second voltage constant element) is connected, relay contact 1
When 4a is closed, the line voltage between the signal lines L to C is set to a constant voltage determined by the Zener diode _ZD3 . Here, the Zener diode ZD ₃ is selected to have a Zener voltage such that ZD ₃ < ZD ₁ compared to the Zener diode ZD ₁ , and when an alarm is received, the supply voltage to the repeater is set to the voltage determined by the Zener diode ZD ₃ . It has a function to convert and send. In addition, 17 is a recovery switch, and _E2 is a power supply.

Next, the action will be explained.

First, under normal monitoring conditions, the Zener diode of repeater 2 is connected to the power supply voltage E ₂ from receiver 1.
ZD ₁ is conductive, and transistor Q ₃ is turned on by the voltage divided by resistors R ₆ and R ₇ . This action of transistor Q ₃ pulls the base of transistor Q ₂ to zero port, causing transistor Q ₂
is turned off.

Next, when the detector 3 is activated due to a fire or gas leak, a line current flows between the pair of signal lines 1-c with low impedance, and this current is transferred to the repeater 2.
The current detection circuit detects the current, turns on the transistor _Q1 , and drives the relay 11. Therefore, the relay contact 11a is closed, the power supply voltage _E2 is applied to the Zener diode _ZD2 , and a conduction current flows. This current is detected by the current detection circuit of the receiver 1, turning on the transistor _Q4 and operating the relay 14. When the relay contact 14a is closed by the operation of the relay 14, the buzzer 15 and warning light 16 of the receiver 1 are activated to issue an alarm. Also Zener diode ZD ₃
is connected between the signal lines L to C via a diode D, converts it into a voltage determined by ZD ₃ , and sends it back to the repeater 2. This return voltage is lower than the Zener voltage of the Zener diode ZD ₁ , so the Zener diode
ZD ₁ is turned off and transistor Q ₃ is also turned off. When the transistor Q ₃ is turned off, the transistor Q ₂ is turned on and the light emitting element PC ₁ is driven to emit light. This light is received by the light receiving element PC ₂ , and when the light receiving element PC ₂ is turned on, the buzzer 12 and the warning light 13 are driven. Issue an alarm within the residence. Of course, recovery after the sensor is activated is as follows:
This can be done by turning off the recovery switch 17 of the receiver 1.

As explained above, according to the present invention, when a receiver receives an alarm signal from a repeater installed in a dwelling unit, it converts the voltage using a constant voltage element and sends it back to the repeater, and sends an alarm signal within the dwelling unit. Since the signal response that emits can be made using a pair of signal lines,
This eliminates the need for complicated wiring between the receiver and the repeater, making installation work easier and reducing equipment costs.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram of a conventional reception response device for alarm equipment, and FIG. 2 is a circuit diagram showing an embodiment of the reception response device for alarm equipment according to the present invention. 1... Receiver, 2... Repeater, 3... Sensor,
L, l, L ₀ , L ₁ ...signal line, C, c, C ₀ , C ₁ ,
_C2 ...Common wire _R1 ~ _R10 , _R11 ~ _R13 ...Resistor,
Q ₁ ~ Q ₄ , Q ₁₁ ...transistor, PC ₁ , PC ₂ ...
Photocoupler, ZD ₁ ~ _{ZD 3} ... Zener diode, D ... Diode, 11, 14, 21, 24
...Relay, 12,15,22,25...Buzzer, 13,16,23,26...Warning light, E ₁ ,
E ₂ , E ₀ ... power supply, 17, 27 ... recovery switch.

Claims (1)

[Claims] 1. A plurality of repeaters provided for each dwelling unit are connected in parallel to a pair of signal lines drawn out from the receiver, and after receiving and confirming the alarm output from each repeater with the receiver. In the reception and response device of the alarm equipment, which uses the signal from the receiver to activate the alarm of the repeater of the dwelling unit that outputs the alarm, each of the above repeaters has its own power supply and is equipped with a power source for fire and gas leakage. A detection circuit that detects the activation signal of a sensor such as a sensor and creates a low impedance between a pair of signal lines from the receiver, and a first constant voltage element connected between the pair of signal lines from the receiver. The receiver includes a light emitting element that emits light by detecting a return voltage signal from the receiver, and a light receiving element that receives light from the light emitting element and becomes conductive to connect the alarm load to the own power source, and the receiver is connected to the relay. It is equipped with a reception response circuit that detects the low impedance of the signal line caused by the signal line and drives the alarm, and also converts it to a specified voltage using a second constant voltage element connected between the signal lines and sends it back to the repeater. A reception and response device for alarm equipment, characterized in that: