KR20040057233A - Repeater for fire monitoring system - Google Patents

Abstract

PURPOSE: A relay for fire monitoring system is provided to extend a range of a monitoring region by using a communication control amplifier for controlling a communication path among a receiver, the first relay, and the second relay. CONSTITUTION: An address assignment unit(100) assigns a particular address to a relay. A fire-sensing signal input unit(110) applies current to the fire sensor in order to output a sensing voltage according to a state of the fire sensor. A linear sensing signal input unit(120) outputs a voltage according to a line resistance by applying the current to the linear sensor. A controller(200) is used for receiving the particular address and the sensing voltage to decide operations of the fire sensor and the short circuit between the fire sensor and the relay, and deciding a state of fire and a position of fire by using the voltage according to the line resistance. A relay output unit(300) controls each operation of an alarm generator and a disaster prevention device according to a control signal of the controller. A communication control amplifier(310) is used for controlling a communication path among a receiver, the controller, and another relay and amplifying a communication signal.

Description

Repeater for Fire Surveillance System {REPEATER FOR FIRE MONITORING SYSTEM}

The present invention relates to a repeater for a fire monitoring system that can increase the communication distance between the detector and the receiver in a fire monitoring system consisting of a detector, a repeater and a receiver.

Recently, various communication lines and power lines have been installed in the underground common wards of large cities and small cities to control and power up buildings that are becoming larger and more intelligent, and these elements are very important elements that can shake the foundation of the country. . Thus, fire accidents in these underground cavities can cause unimaginable large economic losses. In order to minimize the risk of fire in the underground cavity, various types of fire detectors have been developed and installed in Korea.

The repeater of the conventional sensing linear detector has a problem that it is difficult to design a long-distance underground joint fire monitoring system itself because the cross-sectional area of the attached wire should be increased when the monitoring distance becomes longer and it may cause communication problems.

Accordingly, the present invention has been made to solve the above problems, and an object of the present invention is to provide a repeater for a fire monitoring system capable of making the monitoring distance of the fire monitoring system longer than in the prior art.

1 is a block diagram of a repeater for a fire monitoring system according to an embodiment of the present invention,

2 is a circuit diagram of the address designation unit shown in FIG. 1;

3 is a circuit diagram of a fire detection signal input unit shown in FIG. 1;

4 is a circuit diagram of a linear sensing signal input unit shown in FIG. 1;

5 is a circuit diagram of a relay output unit shown in FIG. 1;

6 is a circuit diagram of the communication control amplifier shown in FIG. 1;

<Description of the symbols for the main parts of the drawings>

100: address designation unit 110: fire detection signal input unit

120: linear detection signal input unit 130: power supply unit

200: control means 300: relay output unit

310: communication control amplifier

In order to achieve the above object, a repeater for a fire monitoring system according to the present invention includes a address designation unit for designating a unique address of the repeater; A fire detection signal input unit for applying a current to the fire detector and outputting a detection voltage according to the state of the fire detector; A linear sensing signal input unit applying a current to the sensing linear detector and outputting a voltage according to the line resistance of the sensing linear detector; A unique address designated by the address designation unit is input, and the fire detection signal input unit is instructed to apply a current to the fire detector to receive a detection voltage output from the fire detection signal input unit to operate the fire detector and the fire detector and A control means for judging a line break in a relay period and determining a fire state and a fire occurrence distance by receiving a voltage according to line resistance from the linear sensing signal input unit; A relay output unit which receives a control signal from the control unit and switches to control an operation of an alarm generator / disaster prevention facility; Switching operation by receiving a control signal from the control means to control the communication path between the receiver, the control means and the other repeater, and comprises a communication control amplifier for amplifying the communication signal of the receiver, the control means and the other relay period It is done.

Hereinafter, a repeater for a fire monitoring system according to an embodiment of the present invention will be described with reference to the accompanying drawings.

1 is a block diagram of a repeater for a fire monitoring system according to an embodiment of the present invention, Figure 2 is a circuit diagram of the address designation unit shown in Figure 1, Figure 3 is a fire detection signal input unit shown in FIG. 4 is a circuit diagram of the linear sensing signal input unit shown in FIG. 1, FIG. 5 is a circuit diagram of the relay output unit shown in FIG. 1, and FIG. 6 is a circuit diagram of the communication control amplifier unit shown in FIG. 1.

The repeater for a fire monitoring system according to an embodiment of the present invention, as shown in Figure 1, the addressing unit 100, fire detection signal input unit 110, linear detection signal input unit 120, power supply unit 130 , The control means 200, the relay output unit 300 and the communication control amplifier 310.

The address designator 100 serves to designate a unique address of the repeater, and as shown in FIG. 2, a dip switch 101 for designating a unique address of the repeater and a switching operation of the dip switch 101. In accordance with the digital signal in the bit unit is composed of a address signal generator 103 for transmitting a designated address when requested by the control means 200. The dip switch 101 is composed of an 8-bit switch and 4 bits designate a tens unit, and another 4 bits designate a unit of a stage, and can designate addresses from 0 to 99. The control means 200 can change the address during operation of the repeater by reading the signal output from the address signal generator 103. For convenience, the address designation method does not use the binary method, By using it, the address can be easily designated.

The fire detection signal input unit 110 serves to output a detection voltage according to the state of the fire detector by applying a current to the fire detector, as shown in Figure 3, from the control means 200 a photocoupler ( The control signal is applied to the 112 to turn on and off, and during the on operation, a base voltage is applied to the transistor 111 to output an amplified current through the emitter to fire through the photodiodes of the photo couplers 113 and 115. When a current is applied to the detector, voltage is applied to the load resistors R19 and R20 according to the state of the fire detector, and is input to the control means 200 as a detection signal. The control means 200 determines the detection signal to determine the operation of the fire detector (fire occurrence) and the disconnection of the fire detector and the relay line.

The linear sensing signal input unit 120 applies a current to the sensing linear detector and outputs a voltage according to the line resistance of the sensing linear detector. As shown in FIG. 4, the constant current supply units 121 and 123 detect Stable current is supplied to the linear detector, and the variable currents VR1 and VR2 for fine tuning are used to finely adjust the supply current according to the resistance characteristics of the sensing linear detector. The photocouplers 125 and 126 are turned on and off according to the resistance characteristics of the sensing linear detector, and a voltage is induced at the collector end of the photo transistor according to the resistance characteristic of the sensing linear detector. The controller converts the digital signal into a digital signal and applies it to the control means 200. The control means 200 reads the resistance value of the transmitted sensing linear detector to determine the fire condition, and notifies the receiver of the fire occurrence distance. The constant voltage supply unit 128 supplies a stable voltage to the A / D converter 127 to allow accurate A / D conversion.

The power supply unit 130 is a constant voltage circuit for supplying a stable power to the control means 200.

The control means 200 is a microprocessor corresponding to the brain of the present repeater, and receives a unique address designated by the address designation unit 100 and applies the current to the fire detection signal input unit 100 to a fire detector. Instructs the fire detection signal input unit 100 to detect the operation of the fire detector and the disconnection of the line between the fire detector and the input of the detection voltage output from the fire detection signal input unit 100, the voltage according to the line resistance from the linear detection signal input unit 120 Determining the fire state and the distance of the fire is received, and controls the operation of the relay output unit 300 to operate an alarm generator or disaster prevention related equipment in an emergency. In addition, by controlling the communication control amplifier 310 to control the communication path of the receiver, the other repeater and the present repeater.

The relay output unit 300 is a means for controlling the operation of the alarm generator / disaster prevention equipment by switching operation by receiving a control signal from the control means 200, as shown in Figure 5, relays (303, 305) ) Is controlled by the control of the control means 200, and more specifically to the amplified current output from the transistors 307 and 309 connected between the control means 200 and the relays 303 and 305. The operation has been controlled by the operation, the operation of the alarm generator or disaster prevention related equipment during operation. The photocoupler 301 is an overcurrent detection circuit, and when the output current supplied through the contacts of the relays 303 and 305 is greater than or equal to a set value, the photocoupler 301 blocks the output of the relays 303 and 305 to prevent damage to the component due to overcurrent. . The overcurrent detection uses a voltage value generated by the current flowing through the resistor R10. If the voltage value exceeds the anode-cathode operation value of the photocoupler 301, the phototransistor of the photocoupler 301 operates to control the voltage. The overcurrent is notified to 200. The control means 200 monitors the overcurrent supply and turns off the operation of the transistors 307 and 309 when the overcurrent is supplied to remove the drive output of the relays 303 and 305 and notify the receiver of the overcurrent information.

The communication control amplifier 310 receives a control signal from the control means 200 is switched to control the communication path between the receiver, the control means 200 and the other repeater, the receiver, the control means 200 ) And amplifies the signal during communication between other repeaters. In more detail, as shown in FIG. 5, the communication control amplifier 310 may interface with the receiver and the control unit 200 to amplify a communication signal with the communication relay unit 311 and the communication. A relay unit 311, the control means 200 and the amplification communication unit 313 for amplifying a communication signal by interfacing the other repeater. In addition, the buffer (B1), which is activated or deactivated by the control means 200 to control the communication path from the control means 200 to the communication relay unit 311, the amplification communication unit from the communication relay unit 311 Buffer B2 for controlling the communication path to 313, the buffer B3 for controlling the communication path from the control means 200 to the amplification communication unit 313, and the communication relay unit from the amplification communication unit 313. And a control unit 315 made up of a buffer B4 that regulates the communication path to 311.

The operation of the repeater for fire monitoring system according to an embodiment of the present invention having the configuration as described above will be described.

First, the control means 200 applies a current to the fire detector through the fire detection signal input unit 110, receives the detection voltage from the fire detection signal input unit 110, the operation of the fire detector and the fire detector and the relay period line Determination of disconnection and the like, by receiving the detection voltage from the linear detection signal input unit 120 to determine the fire state and the fire occurrence distance, to operate the alarm generator or disaster prevention related equipment through the relay output unit 300 in case of emergency.

In addition, the operation of the control means 200 associated with the communication control amplifier 310 will be described.

First, when a signal is transmitted from the receiver to the repeater, the control means 200 outputs a high signal to the buffers B1, B2, and B3 to maintain the inactive state. Accordingly, the control means 200 through the communication relay section 311 normally receives the communication signal of the receiver.

Subsequently, the control unit 200 receives a signal from the receiver and then decodes the command of the receiver to transmit the command of the receiver to another repeater, or responds to the command to the receiver without transmitting the command to the other repeater. As follows.

(Response to receiver)

The control means 200 outputs a low signal to the buffer B1 to activate it, outputs a high signal to the buffers B4, B3, and B2 to deactivate it, and then responds to a command from the receiver. Thereafter, the response signal is amplified by the communication relay unit 311 and transmitted to the receiver. When the procedure is completed, the response signal is switched to the initial standby state and waits for the command of the receiver.

(Transmission from this repeater to the amplification communication unit)

The control unit 200 activates the buffer B3, deactivates all the remaining buffers B1, B2, and B4, and then amplifies and transmits a command of the receiver to the amplifying communication unit 313, and then transmits the same to another repeater.

(Transmission from other repeater to receiver)

When the control means 200 activates the buffer B4, and deactivates the remaining buffers, the signal from the other repeater is input to the Tx terminal of the communication repeater 311 through the amplification communication unit 313 and transmitted to the receiver.

Therefore, the existing repeater can be used only when the distance from the receiver is about 1.2 km or less, but in the present repeater, the amplification communication unit and the communication repeater were designed to extend the communication distance by about 10 times.

As described above, according to the repeater for a fire monitoring system according to the present invention, the communication control amplification unit for controlling the communication path between the receiver, the repeater and the other repeater, and amplifies a signal during communication of the receiver, the repeater and the other repeater period By including it, the monitoring distance of the fire monitoring system can be made longer than before.

Claims (3)

Fire Detectors and Detection For repeaters for fire surveillance systems that extend the monitoring distance between the linear detector and receiver: A address designation unit for designating a unique address of the repeater; A fire detection signal input unit applying a current to the fire detector and outputting a detection voltage according to the state of the fire detector; A linear sensing signal input unit applying a current to the sensing linear detector and outputting a voltage according to the line resistance of the sensing linear detector; A unique address designated by the address designation unit is input, and the fire detection signal input unit is instructed to apply a current to the fire detector to receive a detection voltage output from the fire detection signal input unit to operate the fire detector and the fire detector and A control means for judging a line break in a relay period and determining a fire state and a fire occurrence distance by receiving a voltage according to line resistance from the linear sensing signal input unit; A relay output unit which receives a control signal from the control unit and switches to control an operation of an alarm generator / disaster prevention facility; Switching operation by receiving a control signal from the control means to control the communication path between the receiver, the control means and the other repeater, and comprises a communication control amplifier for amplifying the communication signal of the receiver, the control means and the other relay period Repeater for fire monitoring systems. The method of claim 1, The address designation unit uses a decimal number designation method and a repeater for a fire monitoring system, characterized in that it comprises a dip switch that can select 10 bits 4 bits and 4 steps. The method of claim 1, The communication control amplifier unit A communication relay unit which amplifies a communication signal by interfacing between the receiver and the control means; An amplifying communication unit for amplifying a communication signal by interfacing the communication relay unit, control means and another repeater; A buffer B1 activated / deactivated by the control means to control a communication path from the control means to the communication relay, a buffer B2 to control a communication path from the communication relay to the amplification communication unit, and the control. And a control unit (B3) for controlling a communication path from the means to the amplifying communication unit, and a buffer (B4) for controlling a communication path from the amplifying communication unit to the communication relay unit. Repeater.