JPH021672Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention is a fire alarm system that receives fire information from a fire detector and a transmitter and warns of fire based on commands based on computer processing. This invention relates to a fire alarm system with a backup function.

(Prior art) In a conventional fire alarm system, multiple repeaters are connected to a signal line drawn out from a receiver, and each repeater is connected to a plurality of fire detectors, a transmitter, and a bell. Each repeater had a unique address set in advance, and in response to a call from the receiver, it compiled fire information from the fire detectors and transmitters connected to it and sent it back to the receiver. In addition, when the fire information for each repeater is input on the receiver side, the built-in microcomputer (hereinafter referred to as CPU) processes the information, and if it determines that there is a fire, it specifies the address of the repeater that returned the fire information. It outputs a control signal, activates the corresponding repeater, and rings the bell.

In addition, when the transmitter is pressed, fire information is sent back via the repeater, and at the same time an operation confirmation signal is sent to the receiver via the operation confirmation line directly connected between the receiver and the transmitter. When the side detects the operation confirmation signal from the transmitter, it recognizes that the transmitter has been pressed through data processing by the CPU, and also
Based on the identification results, a control signal was sent to all repeaters, activating each repeater and ringing all the bells at once.

(Problem that the invention attempts to solve) However, in such a fire alarm system,
Fire information from the transmitter and fire detector, as well as operation confirmation signals from the transmitter, are received and processed by the CPU, so temporary noise or malfunction may occur.
If the CPU runs out of control, the signal processing function for fire information from the fire detector and operation confirmation signal from the transmitter will stop, causing the problem that fire monitoring and drive control of alarm means such as bells will completely stop. Ta.

(Means for solving the problem) The present invention was made in view of the above problem, and even if the CPU goes out of control, at least when the transmitter is pressed, an alarm means such as a bell is reliably activated. In order to provide a fire alarm system with a back-up function that can be driven, the fire detector, transmitter, and alarm means are each connected to the signal line drawn out from the receiver via a repeater, and then sent back together via the repeater. In a fire alarm system that inputs fire information from a fire detector and transmitter into a control unit to determine a fire, and operates a repeater based on a command from the control unit to drive the alarm means, the alarm means and the receiver A detection unit is provided to detect the operation confirmation signal from the transmitter obtained through the forced drive line directly connected between the machines and the operation confirmation line directly connected between the receiver and transmitter, and the detection output of the detection unit is Based on this, the alarm means is driven via a forced drive line.

(Embodiment) FIG. 2 is a block diagram showing the overall configuration of the present invention.

First, to explain the configuration, 1 is a receiver, and a signal line L1 is drawn out from the receiver 1 and connects each of a plurality of repeaters 2a, 2b, . . . 2n. Sensing lines L from each repeater 2a, 2b,...2n
2 and bell wire L3 are each drawn out. Each sensing line L2 is connected to a plurality of fire detectors 3 and a transmitter 4 at its terminal end. Also,
A bell 5 is connected to each bell line L3 as an alarm means for warning of fire. Each repeater 2a, 2b,...
Each of the 2n has a unique address set in advance, and in response to a call from the receiver, it compiles fire signals from multiple fire detectors 3 and transmitters 4 connected to itself and sends them to the receiver 1. At the same time, the bell 5 is made to ring based on the command from the receiver 1. An operation confirmation line L4 is directly connected from each transmitter 4 via a terminal P5, and when the transmitter 4 is pressed, it outputs a fire signal to the corresponding repeater, and at the same time it is connected to the receiver 1 via the operation confirmation line L4. Outputs an operation confirmation signal. Forced drive line L5 from each bell 5
is directly connected to receiver 1 via terminal P7.

Next, the internal configuration of the receiver 1 will be explained. Reference numeral 7 denotes an information collecting section, which collects detection information from each repeater 2a, 2b, . . . 2n based on a command from the control section 8. The control unit 8 includes a microcomputer (hereinafter referred to as
(abbreviated as CPU), the computer processes the detection information from the information collection unit 7 and determines whether there is a fire. When the control unit 8 determines that there is a fire, it drives the display unit 9 to display an alarm, outputs a control signal to the information collection unit 7, specifies the address of the repeater that returned the fire signal, and calls the corresponding bell 5. Command the ringing. Reference numeral 10 denotes a reception processing unit, which, upon receiving the operation confirmation signal from the transmitter 4 obtained via the operation confirmation line L4, drives the display unit 9 to display that the transmitter has been pressed, and at the same time Power is supplied to the bell 5 via the drive line L5 and commands are given to ring the bell.

FIG. 1 is a circuit diagram showing the main parts of the present invention.
8 is a control section, 9 is a display section, and 10 is a reception processing section.

First, to explain the internal configuration of the reception processing section 10, P1, P2, P3, P4, P5, P6, P
7, P8 are terminals, a voltage Va, for example, 15V is applied to the terminal P1, a voltage Vb, for example, 12V is applied between the terminals P2 and P3, and a voltage Vc, for example, 30V is applied between the terminals P4 and P6. There is. An operation confirmation signal that becomes a logic L level when the transmitter 4 is pressed is input to the terminal P5. 19 is terminal P5
This is a detection unit that detects the operation confirmation signal from the transmitter obtained via the transmitter. To explain the internal configuration of the detection unit 19, there is a relay contact 18 between terminals P4 and P5.
b, a series circuit of a resistor R4 and a diode D4 and a series circuit of a resistor R5, a resistor R6, and a diode D5 are connected in parallel. A transistor Q4, a resistor R7, and a resistor R8 are connected in series between terminals P4 and P6. The connection point between resistors R5 and R6 is connected to the base of transistor Q4, and L is connected to terminal P5.
When the operation confirmation signal from the transmitter 4 that reaches the level is input, the transistor Q4 is turned on. A connection point between transistor Q4 and resistor R7 is connected to resistor R10 and transistor Q5 via resistor R9. Further, the connection point between the resistors R7 and R8 is connected to the base of the transistor Q3, and when the transistor Q4 is turned on, the transistor Q3 is made conductive. Further, the collector of the transistor Q5 is connected via a diode D6 to a series circuit of the display section 9, a resistor R3, and a photodiode PH1. A predetermined voltage Va is applied to the photodiode PH1 via the terminal P1, and the transistor Q
When 5 is turned on, photodiode PH1 emits light. A parallel circuit consisting of a relay 18, a diode D3, and a photodiode PH1 is connected between terminals P2 and P3.
A phototransistor PH that receives light emitted from
A series circuit with 2 is connected, and a light emitting diode
Phototransistor PH based on the light emission of PH1
2 becomes conductive, turning on the relay 18. P9 and P10 are terminals connected to the power supply 20;
A relay contact 18a of the relay 18 is connected in series to a parallel circuit consisting of a relay 21 and a diode D7 between the power lines drawn out from the relay 18.
is turned on, relay contact 18a is closed, and relay 2
1 to close the relay contact 21a of the relay 21, a power supply voltage for driving the bell 5, for example 24V, is output to the terminals P7 and P8. 16 and 17 are AND circuits, and the AND circuit 16 is connected to the base of the transistor Q1 via a resistor R1, and the collector of the transistor Q1 is connected to the display section 9. Further, the AND circuit 17 is connected to the base of the transistor Q2 via the resistor R2, and the collector of the transistor Q2 is connected to the diode D6, the display section 9, and the resistor R3.

Next, the internal configuration of the control section 8 will be explained. 11 is an I/O port, and 12 is a CPU. The I/O port 11 is connected to an information collection unit 7 (not shown), and the CPU 12 receives fire information from the information collection unit 7 via the I/O port 11, and when it determines that there is a fire, the I/O port 11 Outputs control signals via. In addition, the I/O port 11 is connected to the reception processing section 10.
The built-in transistor Q3 is connected to the AND circuits 16 and 17 by a signal line, and when the CPU 12 determines that the transmitter has been pressed based on the ON of the transistor Q3, a signal is sent to one of the input terminals of the AND circuit 17. Output. Further, when the CPU 12 determines that the fire signal is from a fire detector based on the fire information from the information collection unit 7, the AND circuit 16
Outputs a signal to one input terminal of the 13 is CPU
This is a monitoring unit that monitors the operating state of the CPU 12, and is composed of an oscillation circuit 14 that oscillates at a predetermined period and a counter 15 that counts the oscillation output from the oscillation circuit 14. A reset signal is output at predetermined intervals. The counter 15 resets its counting operation based on a reset signal obtained from the CPU 12 via the I/O port 11 at predetermined intervals. Also, if the CPU 12 goes out of control, the counter 1
Since the reset signal for 5 is no longer obtained, the counter 15 counts up and outputs an L level signal to the common input terminal of the AND circuits 16 and 17.

Next, the internal configuration of the display section 9 will be explained. LA1
is an indicator light that indicates that the transmitter has been pressed, LA2
is an indicator light indicating that the fire detector has detected a fire, and a predetermined voltage Vd, for example 24V, is applied to the indicator light. D1 and D2 are diodes for preventing backflow.

Next, the operation will be explained. First, a fire monitoring operation in a normal monitoring state will be explained. For example, repeater 2a
If the fire detector 3 connected to
Return via. In the receiver 1, when the control unit 8 determines the fire signal from the repeater 2a based on the fire information obtained through the information collection unit 7, it outputs a control signal to the information collection unit 7 and controls the relay 2a. Bell 5 connected to repeater 2a by specifying the address
commands the sound of the sound. Further, the control unit 8 drives the display unit 9 to display a fire display.

Next, if the person who discovered the fire presses the transmitter 4 connected to the repeater 2a, the repeater 2a will receive the fire signal from the transmitter 4 in the same way that the fire detector 3 outputs the fire signal. In response to the call from receiver 1, the receiver 1 returns the address along with its own address. On the other hand, as shown in FIG. 1, when the transmitter 4 is pressed, the terminal P5 is pulled to the logic L level, and the transistors Q4 and Q3 are turned on. The CPU 12 determines that the transmitter 4 has been pressed based on the ON of the transistor Q3, and outputs a signal to one input terminal of the AND circuit 17 via the I/O port 11. Further, the other input terminal of the AND circuit 17 is given an H level indicating the normal operating state of the CPU from the monitoring unit 13, and the transistor Q2 is turned on based on the AND output from the AND circuit 17. . When the transistor Q2 is turned on, the indicator light LA1 is turned on, and at the same time, the light emitting diode PH1 is turned on. Based on the light emission from the light emitting diode PH1, the phototransistor PH2 becomes conductive, turning on the relay 18. When the relay 18 is turned on, the relay contact 18a is closed, which drives the relay 21 and closes the relay contact 21a.
close. When the relay contact 21a closes, the terminal P
7. Output voltage 24V between P8 and force drive line L5.
All bells 5 are rung simultaneously via the button.

Next, the fire monitoring operation when the CPU 12 goes out of control will be explained. When the CPU 12 goes out of control due to noise or the like, the counter 5 counts the oscillation output from the oscillation circuit 14 because a reset signal cannot be obtained from the CPU 12, and when it reaches a predetermined count and counts up, the counter 5 outputs the output to the AND circuits 16 and 17. L
A level is output to block the operation of transistors Q1 and Q2. On the other hand, as shown in FIG. 1, when the transmitter 4 is pressed, it is pulled to the L level via the terminal P5, and the transistor Q4 is turned on. When the transistor Q4 is turned on, the transistor Q5 is also turned on, lighting up the display columns LA1 and LA2, and at the same time pulling the cathode side of the photodiode PH1 to the L level via the diode D6, causing the photodiode PH1 to emit light. Light emitting diode PH1
Based on the light emission, the light emitting transistor PH2 becomes conductive, and the relay 18 is turned on. When the relay 18 is turned on, the relay contact 18a is closed, and the relay 21 is driven to close the relay contact 21a. Relay contact 21
When the bell a is closed, a voltage of 24V is outputted through the forced drive line L5, causing all the bells 5 to ring simultaneously.

(Effects of the invention) As explained above, according to the invention, each of alarm means such as a fire detector, a transmitter, and a bell is connected to the signal line drawn out from the receiver via a repeater. The fire information from the fire detector and transmitter that is collected and sent back by the controller is input into the control unit, processed by a computer to determine the presence of a fire, and based on the command from the control unit, a repeater is activated to issue an alarm such as a bell. In a fire alarm system that drives the alarm means, the operation confirmation signal from the transmitter is obtained through a forced drive line directly connected between the alarm means and the receiver, and an operation confirmation line directly connected between the receiver and the transmitter. By providing a detection unit for detection and driving the alarm means via a forced drive line based on the detection output of the detection unit, even if the CPU goes out of control due to temporary noise, etc., the transmitter will not be pressed. In such a case, the operation confirmation signal from the transmitter can be reliably detected, and the detection output of the detection unit that detects the operation confirmation signal from the transmitter can reliably ring an alarm means such as a bell. Effects can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a circuit section showing the main parts of the present invention, and FIG. 2 is a block diagram showing the overall configuration of the present invention. DESCRIPTION OF SYMBOLS 1... Receiver, 2a, 2b,...2n... Repeater, 3... Fire detector, 4... Transmitter, 5... Bell, 7... Information collection section, 8... Control section, 9... ...Display unit, 10...Reception processing unit, 11...I/O port, 12...CPU, 13...Monitoring unit, 14...
Oscillation circuit, 15... Counter, 16, 17... AND circuit, 18, 21... Relay, L1... Signal line, L2... Sensing line, L3... Bell wire, L4...
Operation confirmation line, L5...forced drive line, P1, P2,
P3,...P10...terminal, Q1, Q2, Q3,
Q4, Q5...Transistor, R1, R2, R
3,...R10...Resistor, PH1...Photodiode, PH2...Phototransistor.

Claims (1)

[Claims for Utility Model Registration] A fire detector, a transmitter, and an alarm means are each connected to a signal line drawn out from a receiver via a repeater, and the fire detector is sent back together from the repeater. and a fire alarm device that inputs fire information from a transmitter into a control unit to determine a fire, and operates the repeater based on a command from the control unit to drive the alarm means, the alarm means and the receiver. A detection unit is provided to detect an operation confirmation signal from the transmitter obtained through a forced drive line directly connected between the receiver and the transmitter, and an operation confirmation signal directly connected between the receiver and the transmitter. A fire alarm device characterized in that the alarm means is driven via the forced drive line based on the forcible drive line.