JP3254080B2 - Disaster prevention monitoring device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disaster prevention monitoring device having a function of remotely testing a fire detection terminal and checking whether or not the terminal operates.

[0002]

2. Description of the Related Art In a disaster prevention monitoring device of this type, a repeater or a receiver monitors a voltage due to a change in impedance of a sensor line.
At 1V, each event is detected such as "fire" and displayed on the display panel of the receiver.

In a building such as an apartment house, a plurality of fire detecting terminals are installed in each dwelling unit. However, when the fire detection terminal is installed in the dwelling unit of the apartment house, the inspector may not be able to enter the dwelling unit and directly inspect the fire detection terminal. Therefore, it is necessary to test the fire detection terminal remotely from outside the house and check whether the terminal operates.

Accordingly, the present inventors have proposed a fire / disconnection detection in which a repeater detects a "disconnection", "normal", "fire" or the like of a sensor line as described above and transmits the information to a receiver. The proposed method consists of a circuit and an automatic inspection circuit that remotely tests and activates the fire detection terminal. In the operation test of the fire detection terminal, a method is proposed in which the detector line is disconnected from the fire detection / disconnection circuit and switched to the automatic inspection circuit. ing. In addition, the present inventors have proposed a method of disconnecting a detector line from a fire detection / disconnection circuit during an operation test of a fire detection terminal, and switching to an inspection device having the same configuration as the automatic inspection circuit.

[0005]

However, in the above-mentioned disaster prevention monitoring device, when an operation test of the fire detection terminal is performed, the detector line is disconnected from the fire / disconnection detection circuit and switched to an automatic inspection circuit or an inspection device. For the disconnection detection circuit, the sensor line is in a "disconnected" state. Therefore, even though the detector line is not “disconnected”, a fire /
The disconnection detection circuit sends a "disconnection" signal to the receiver, and the "disconnection" information is displayed on the display panel of the receiver. Therefore, since the "disconnection" information is displayed during the operation test of the fire detecting terminal, the operation test operation is very confusing.

SUMMARY OF THE INVENTION In view of the above-mentioned conventional problems, the present invention prevents the fire / disconnection detection circuit from sending out disconnection information when the detector line is disconnected from the fire / disconnection detection circuit during the operation test of the fire detection terminal. It is an object of the present invention to provide a disaster prevention monitoring device capable of performing an operation test by a simple operation.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a method for detecting a disconnection state due to a change in voltage of a detector line.
A fire and disconnection detecting means for detecting a normal state and a fire state; a terminator connected to the end of the sensor line so that the detection voltage of the fire and disconnection detecting means becomes a disconnection state when the sensor line is disconnected; Automatic inspection means for remotely testing and operating the fire detection terminal connected to the detector line, and a sensor line for switching the automatic detection means by disconnecting the detector line from the fire and disconnection detection means during the operation test of the fire detection terminal Switching means, and impedance switching means for switching the detection voltage of the fire and disconnection detecting means to a normal state when the sensor line is disconnected from the fire and disconnection detecting means by the sensor line switching means. And

[0008] In the disaster prevention monitoring device of the present invention,
A fire and disconnection detecting means for detecting a disconnection state, a normal state and a fire state by a voltage change of the detector line in a disaster prevention monitoring device in which an inspector for remotely testing and operating a fire detection terminal can be connected to the detector line. And a terminator connected to the end of the sensor line so that the detection voltage of the fire and disconnection detecting means becomes disconnected when the sensor line is disconnected, and a fire and a fire during the operation test of the fire detection terminal. A detector line switching means for disconnecting from the disconnection detecting means and switching to the inspection device, and a normal state of the detection voltage of the fire and disconnection detecting means when the detector line is disconnected from the fire and disconnection detecting means by the detector line switching means. And impedance switching means for switching so that

Further, in the disaster prevention monitoring device of the present invention,
The impedance switching means is characterized in that the sensor line is short-circuited by a photocoupler which is turned on when the sensor line is disconnected from the fire and disconnection detection means by the sensor line switching means. Further, in the disaster prevention monitoring device of the present invention, a single on-off type fire detecting terminal is installed for each predetermined monitoring area, and the relay is connected to the fire detecting terminal via the sensor line and the operation test line. The receiver transmits a test command including the address to the repeater during the operation test of the fire detection terminal, and the repeater receives the test command and switches the detector line provided in the repeater. Means disconnecting the detector line from the fire and disconnection detection means and switching to the automatic inspection means, the automatic inspection means applying a test voltage to the detector through the beginning of the operation test line, and each fire detection terminal When the alarm is issued, the test voltage is returned to the repeater via the end of the operation test line, and when the test voltage is detected from the fire terminal via the end of the operation test line, the fire detector is determined to be normal. That de Characterized in that it returns the data to the receiver.

Further, in the disaster prevention monitoring device of the present invention,
A plurality of on-off type fire detecting terminals are installed for each predetermined monitoring area, and a repeater is connected to the fire detecting terminal via a detector line and an operation test line. Sends a test command including the address to the repeater, the repeater receives the test command, and the sensor line switching means provided in the repeater disconnects the sensor line from the fire and disconnection detection means and automatically performs the operation. Switch to the inspection means, the automatic inspection means applies the test voltage to the first stage fire detection terminal through the beginning of the operation test line, and when each fire detection terminal issues a test voltage, the test voltage is applied to the next stage. Relay to the fire detection terminal, the last stage fire detection terminal returns the test voltage to the repeater, and if the test voltage from the last stage fire detection terminal is detected, all fire detection terminals are judged to be normal Shite Wherein the reply data to the receiver.

[0011]

According to the present invention, in a configuration in which the fire and disconnection detecting means detects a disconnection state, a normal state and a fire state due to a change in the impedance of the sensor circuit, the fire and disconnection detection means detects the fire and disconnection detection operation at the time of operation test of the fire detection terminal. The switching is performed so that the detection impedance of the fire and disconnection detecting means becomes normal when disconnected from the power line. Therefore, even if the fire and disconnection detecting means is disconnected from the sensor line, the disconnection state is not detected, so that the transmission of the disconnection information can be prevented, and the operation test can be performed with a simple operation.

[0012]

Embodiments of the present invention will be described below in the following order. 1. 1. Overall configuration and transmission format Fire terminal 3. 3. Repeater according to the present invention 4. Operation of receiver and repeater Inspection device 1. 1. Overall Configuration and Transmission Format (FIGS. 1 to 4) In FIG. 1, the receiver 1 and a plurality of repeaters 200 are bus-connected via a power supply line V and three transmission lines 3 including signal lines S and SC. It performs data transmission and is thus configured in a so-called intelligent type (R type). The receiver 1 is installed in a central monitoring room (for example, a guard room) of an apartment house, and the repeater 200 is installed outside each dwelling unit (for example, outside the entrance) of the apartment house. The repeater 200 is provided with an automatic inspection circuit 42 to be described later and a connector 43 for connecting a portable outdoor inspection device 44.

The receiver 1 includes a control unit 101 including a CPU, an input / output unit 102 for performing data transmission with the repeater 200, an operation unit 103, and a display unit 104.
And an alarm unit 105. In this system, for example, as shown in FIG.
To collect terminal information from 00 by polling method,
Each repeater 200 has its own unique address A1, A2
Is set, for example, addresses “1” to “127” are set. By providing the power supply line V and the signal lines S and SC in n sets, a system with 127 × n repeaters 200 can be configured.

The frame format from the receiver 1 to each repeater 200 is, for example, as shown in FIG. 3, a command field of 8 bits, an address field, a checksum field, a start bit added before these fields, It is composed of a total of 33 bits including a parity bit and a stop bit added later. Therefore, the receiver 1 sets the calling command and the set address of each repeater 200 in the command field and the address field, respectively, and sets the signal lines S, S
By sending it to C, it can be called for each repeater 200.

On the other hand, the frame format from the repeater 200 to the receiver 1 is, for example, as shown in FIG. 4, an 8-bit transmission data field and a checksum field, and a start bit added before these fields. The checksum data is a value obtained by adding the transmission data and the address of the transmission source (repeater 200). Therefore, the repeater 200
Transmits its own address along with data to the signal lines S and SC in response to a call from the receiver 1, and
By subtracting the data from the checksum, the transmitted address of the repeater 200 can be extracted.

On the other hand, as shown in FIG. 1, one or more (generally, five or six) on-off type fire detecting terminals 2 are installed in each dwelling unit of the apartment house. The system of the device 200 and the fire detecting terminal 2 is of a so-called on-off type (P type). From the repeater 200 of each dwelling unit,
A detector line LA comprising a line LA and a common line CA,
The CA is pulled out to connect the fire detection terminals 2 in parallel, and the terminal fire detector terminals LB and CB are drawn out from the last stage fire detection terminal 2 and are loop-back wired to the repeater 200. I have.

Further, in this embodiment, inspection circuits 10, 16 to 18 as shown in detail in FIG. 5 are provided in each fire detection terminal 2 in order to sequentially perform the operation test of the plurality of fire detection terminals 2. The inspection circuits 10, 16 to 18 of each fire detection terminal 2 are connected in series to the operation test lines QA, QB drawn from the automatic inspection circuit 42 on the repeater 200 side. The operation test line QB from the fire detection terminal 2 at the last stage is loop-back wired to the automatic inspection circuit 42 on the repeater 200 side. 2. Fire Terminal (FIGS. 5 to 7) Next, the configuration of the fire detection terminal 2 will be described in detail with reference to FIG. FIG. 5 shows a heat sensor, the circuits 3 to 9 shown in the upper part constitute a fire detection circuit, and the test switch unit 10 shown in the upper part and the circuits 16 to 18 shown in the lower part constitute an inspection circuit. I have. The power supply unit 3 is connected to the repeater 200 via two sensor lines LA and CA composed of a line LA and a common line CA, and non-polarizes the current between the lines LA and CA by a diode bridge, a zener diode, a capacitor, or the like. And supplies power to the circuits 4 to 10 in the subsequent stages.

The operation output unit 4 detects an alarm signal from the switching unit 6 via the resistor R0, and detects an operation by using the LED.
(Not shown) and a short circuit between the lines LA and CA outputs an alarm signal to the repeater 200. The constant voltage circuit 5 prevents excessive current on the lines LA and CA and A constant current is supplied to the subsequent circuits 6 to 10.
The temperature sensing unit 9 is composed of a series circuit of a thermistor 9a and a resistor 9b having a negative characteristic whose resistance value decreases as the temperature increases, and the voltage divided by the thermistor 9a and the resistor 9b is used as a temperature detection signal as a temperature detection signal. Is applied to the negative terminal of the operational amplifier OP via the resistor R15. Therefore, the negative terminal of the operational amplifier OP has a voltage dividing ratio of 9b / (9a
+ 9b), a relatively high voltage is applied when a fire occurs, and this voltage is applied to the operational amplifier O.
When the voltage becomes higher than the voltage applied to the + terminal of P, the output voltage of the operational amplifier OP changes from high level to low level.

The reference value setting circuit 8 includes resistors R1, R2, R3
And the connection point of the resistors R1 and R2 is applied to the + terminal of the operational amplifier. The collector and the emitter of the transistor Q3 constituting the test switch section 10 are connected to both ends of the resistor R3, and the resistor R12 is connected between the base and the emitter of the transistor Q3.

The transistor Q3 is turned off during normal fire monitoring and turned on during an operation test. Therefore, during normal fire monitoring, the partial pressure ratio (R2 + R3)
A relatively high voltage according to / (R1 + R2 + R3) is applied, and a relatively low voltage according to R2 / (R1 + R2) is applied during an operation test. That is, the operational amplifier OP
The voltage applied to the + terminal is relatively high during normal fire monitoring and relatively low during an operation test, so that the resistance value of the thermistor 9a is relatively reduced during the operation test, that is, equivalent to a fire occurrence state. Therefore, the output voltage of the operational amplifier OP changes from the high level to the low level.

The switching section 6 has Darlington-connected transistors Q1 and Q2, and the emitter of the transistor Q1 is connected to the line L. The base of the transistor Q2 is connected to the line L via a resistor R9, and the operational amplifier OP is connected via a resistor R10.
Output terminal. Transistors Q1, Q2
Are connected to the resistor R in order to output an alarm signal.
0 is connected to the operation output unit 4 via a resistor R1.
6 is connected to the alarm detection circuit 18.

Next, the inspection circuits 16-1 shown in the lower part of FIG.
8 will be described. The switch circuit 16 is connected to the repeater 200 in the preceding stage.
By supplying a test power supply from the automatic inspection circuit 42 or the fire detection terminal 2 to the test switch unit 10, a state equivalent to a fire occurrence state is created, and the alarm detection circuit 1
The test power is supplied (relayed) to the fire detection terminal 2 in the next stage based on the alarm detection signal from the fire detection terminal 8. Forced recovery circuit 1
Reference numeral 7 forcibly activates the alarm detection circuit 18 by a relatively high-level forcible recovery pulse from the preceding stage when the alarm is not generated due to the disconnection of the thermistor 9a during the operation test.

Hereinafter, the switching circuit 1 will be described in detail.
6 is a first terminal 16 connected to the operation test lines QA and QB.
a and a second terminal 16b, and the terminals 16a, 16b
Is one of the automatic inspection circuits 4 of the repeater 200 in the preceding stage.
2 or one of the terminals 16a and 16b of the fire detection terminal 2 to input the signal Qin, and the other is connected to one of the terminals 16a and 16b of the next stage fire detection terminal 2 to output the signal Qout. Output.

The terminals 16a and 16b are respectively connected to the cathodes of the Zener diodes Z1 and Z2, one ends of the resistors R4 and R5, and the sources of the FETs Q4 and Q5.
The drains of TQ4 and Q5 are short-circuited. The anodes of the Zener diodes Z1 and Z2 and the other ends of the resistors R4 and R5 are connected to the gates of the FETs Q4 and Q5 and the anodes of the diodes D1 and D2, respectively.
The cathodes of D1 and D2 are both connected to one end of each of resistors R6, R7 and R13 in the forced recovery circuit 17, and the other end of the resistor R7 is connected to the base of the transistor Q3 of the test switch section 10 via the resistor R8. And connected to the common C via a capacitor C3.

When the test voltage Qin is input from the preceding stage via the terminal 16a (or 16b), the test voltage Qin is applied to the capacitor C3 via the resistor R4 (or R5), the diode D1 (or D2), and the resistor R7. The voltage is applied to charge the capacitor C3, and the charged voltage is applied to the base of the transistor Q3 of the test switch unit 10 via the resistor R8, turning on the transistor Q3, which is in a state equivalent to a fire state.

Here, the resistance values of the resistors R6 to R8 on the base side of the transistor Q3 of the test switch section 10 are set so that the FETs Q4 and Q5 are not turned on unless a thyristor Q7 in the alarm detection circuit 18 described later is turned on. And diodes D1 and D2. The Zener diodes Z1 and Z2 are provided so that a voltage higher than a specified value is not applied to the FETs Q4 and Q5.

The other end of the resistor R6 in the forced recovery circuit 17 is connected to the cathode of the zener diode Z3 and one end of the capacitor C1, and the anode of the zener diode Z3 is connected to the base of the transistor Q6 and one end of the resistor R14. . Here, a zener diode Z3 that does not conduct at a test voltage but conducts by a relatively high level forced recovery pulse is used. Also, when a relatively high level forced recovery pulse is applied, the capacitor C1 charges this pulse, so that the switch circuit 16 of the fire detection terminal 2 under test is immediately turned on, and the next stage of fire detection is performed. It is used to prevent the forced recovery pulse from being applied to the terminal device 2.

The other end of the resistor R13 is connected to the collector of the transistor Q6. The emitter of the transistor Q6 is connected to the other end of the resistor R14 and one end of the resistor R17.
The other end of 7 is connected to the anode of the diode D3 in the alarm detection circuit 18. The other end of the capacitor C1 is connected to the common line C. The test voltage is supplied to the anode of the thyristor Q7 in the alarm detection circuit 18 via the resistor R7, and the gate of the thyristor Q7 is output from the transistors Q1 and Q2 of the switching section 6 via the resistor R16 and the diode D5. An alarm signal and a forced recovery pulse are input via the diode D3. A resistor R11 and a capacitor C2 are connected in parallel between the gate and the cathode of the thyristor Q7.

Next, the operation of the above embodiment will be described. First, at the time of normal fire monitoring in which the test voltage is not supplied, the transistor Q3 of the test switch unit 10 is off, and in this case, the operational amplifier OP is connected to the + terminal side resistors R2 and R3.
Of the resistor 9b corresponding to the resistance value of the negative characteristic thermistor 9a on the negative terminal side.
Therefore, when the resistance value of the negative characteristic thermistor 9a decreases, the output of the operational amplifier OP becomes low, and the switching unit 6 outputs a high-level alarm signal.

On the other hand, when the test voltage is supplied from the preceding stage, the test voltage is applied to the resistors R4 (or R5), R7, R7
8 to the test switch unit 10 to turn on the transistor Q3. In this case, the operational amplifier OP
The voltage at both ends of only the resistor R2 on the terminal side is compared with the voltage at both ends of the resistor 9b according to the resistance value of the negative characteristic thermistor 9a on the-terminal side. Therefore, the negative characteristic thermistor 9
In the normal case where there is no disconnection of a, etc., the negative characteristic thermistor 9a
And the switching unit 6 outputs a high-level alarm signal.

Next, the alarm signal is output to the alarm detection circuit 18.
Of the thyristor Q7, the thyristor Q7 is turned on, and the test voltage from the preceding stage is applied to the resistor R4 (or R4).
5), the diode D1 (or D2), the resistor R7, the thyristor Q7, and the common line C.
8 is divided, and the FETs Q4, Q5
Is applied between the gate and source of the FET Q4 (or Q5). Therefore, the FETs Q4 and Q5 are turned on, the first terminal 16a and the second terminal 16b are short-circuited, and the test voltage from the previous stage is relayed to the next stage via the FETs Q4 and Q5. As will be described later, the repeater 200 performs automatic recovery via the detector lines LA and CA each time it receives an alarm signal from the fire detection terminal 2.

FIG. 6 shows another example of the inspection circuit of the fire detecting terminal 2, in which the forced recovery circuit 17a is modified. The cathodes of the diodes D1 and D2 of the switch circuit 16 are
The cathode of the diode D4 is connected to one end of the resistor R9, and the resistor R9 is connected between the gate and the source of the FET Q8.
9, R10 and a capacitor C4 are connected in parallel.
The drain of the FET Q8 is connected to the resistor R11 and the alarm detection circuit 18
Is connected to the gate of the thyristor Q7 via the diode D3 of the
, A capacitor C1 is connected between the sources.

Then, in this example, if the repeater 200 does not receive the alarm signal within a predetermined time after applying the test voltage, it sends out a relatively high level forced recovery pulse,
Next, when a test voltage is output, the charging voltage of the capacitor C1 is higher than the supply voltage, so that a current flows through the diode D4 via the resistor R10, and the voltage applied to the resistor R10 turns on the FET Q8. . Therefore, the thyristor Q7 is turned on by the gate signal from the diode D3, and the test voltage is relayed to the fire detection terminal 2 at the next stage.

FIG. 7 is a smoke type fire detection terminal using the present invention. The circuits 27 to 34 shown in the upper part of FIG. 7 constitute a fire detection circuit, and the test switch unit 10 shown in the upper part and the circuits 16 to 18 shown in the lower part constitute an inspection circuit. The inspection circuits 16 to 18 correspond to the inspection circuits 16 to 1 shown in FIG.
8 is a circuit similar to FIG. An operation indicator lamp circuit 27 turns on the operation indicator LED when the fire detection terminal issues an alarm. Numeral 28 denotes a rectifier circuit / noise absorbing circuit which depolarizes the current between the lines L and C by a diode bridge, a Zener diode, a capacitor, etc., and further suppresses the noise, and supplies power to the circuits 29 to 34 at the subsequent stages. I do. Reference numeral 30 denotes a constant voltage / current limiting circuit for preventing a transient current on the lines L and C and supplying a constant current to the circuits 31 to 34 at the subsequent stage.

The test switch section 10 includes a test light emitting element D
7. The resistor R18 and the transistor Q18 are connected in series, and are connected between the lines L and C. Transistor Q1
8, a resistor R19 is connected between the common line C and the base of the transistor Q18 and the inspection circuit 16
To 18 are connected. At the time of normal monitoring, the light emitting element D6 is pulse-driven by the oscillation circuit 32 and emits light periodically. When smoke is generated by the fire, the light from the light emitting element D6 is scattered by the smoke and enters the light receiving element D8. The incident light is converted into a photocurrent, the signal is amplified by the amplifier circuit 33, and the signal is input to the comparison circuit 34. When this signal exceeds the specified value, the counting circuit 31 synchronizes with the light emitting element.
Performs a count, and sends an alarm signal to the switching circuit 29 when the count reaches a predetermined count. The switching circuit 29 receives this signal and performs switching to generate a fire signal, and simultaneously turns on the operation indicator lamp of the operation indicator lamp circuit 27.

When testing the fire sensing terminal, the terminal 16a
(Or 16b) supplied from the test circuit 1
6-18, the transistor Q of the test switch section 10
Supplied to 18 bases. Therefore, the transistor Q1
8 is turned on to light the test light emitting element D7 and the light receiving element D
8 directly. When the fire sensing terminal emits an alarm using the test light emitting element, an alarm signal is transmitted from the switching circuit 29 to the alarm detection circuit 18 and the switch circuit 16 is activated.
To short-circuit the terminals 16a and 16b, and supply the test power to the fire detection terminal at the next stage. 3. Repeater (FIGS. 8 and 9) Next, the configuration of the repeater 200 will be described with reference to FIGS. FIG. 8 shows a circuit section on the upper side, a circuit for transmitting data to and from the receiver 1 and a circuit for detecting an alarm signal from the fire detection terminal 2 and a disconnection of the detector lines LA and CA. Is shown. FIG. 9 shows the automatic inspection circuit 42 on the lower side of the repeater 200. First, the circuit configuration on the upper side shown in FIG. 8 will be described. The transmission / reception circuit 201 for performing data transmission with the receiver 1 is connected to the signal lines S and SC from the receiver 1 with a 3.2 V constant voltage. Circuit 202
Is connected.

The transmission / reception circuit 201 has a monitor LED 203 which blinks according to transmission data "0" and "1".
And a transmission IC 204 for performing transmission control, sensor control, and the like, and the transmission IC 204 is constituted by, for example, a microprocessor. The transmission IC 204 is connected to a circuit 205 for setting a repeater address and a type, and a photodiode 206a of a photocoupler for performing a fire test. The phototransistor 206b of the fire test photocoupler is shown in the test relay control unit 253.

Power supply line V and common line SC from receiver 1
Is connected to a 20 V constant voltage circuit 207, and a 35 V boost circuit 208 and a constant current circuit 209 are connected to the 20 V constant voltage circuit 207. Also, a 35V booster circuit 208
Is connected to a control voltage monitoring circuit 210, and a control line abnormality signal from the control voltage monitoring circuit 210 is transmitted to the transmission IC 204.
Is detected by

The transmission IC 204 controls the 35V booster circuit 208 with an A / D timing signal (/ AOQ) (hereinafter, the symbol “/” is used as an inverted signal except for division).
Further, the constant current circuit 209 outputs 0 mA, 7 mA, and 30 mA at “recovery”, “normal monitoring”, and “fire” respectively.
A line cut signal (/ L-CUT) and an outdoor indicator light drive signal (/ LED) to output three types of constant currents of mA
Is controlled by

The transmission IC 204 has an outdoor indicator light 211 controlled by an outdoor indicator light drive signal (/ LED).
And the photodiode 212a of the transfer photocoupler are connected to each other.
The outdoor indicator light drive signal (/ LED) is set to the L level so that the outdoor indicator light 211 of 00 is turned on reliably, and the constant current circuit 209 outputs a constant current of 30 mA.

Also, at the time of "restoration" and "at the time of normal monitoring", the outdoor indicator driving signal (/ LED) is set to H level,
The line cut signal (/ L-CUT) is L
The level is set to H level at the time of “normal monitoring”. The phototransistor 212b of the transfer photocoupler is shown in the transfer circuit 256. To this constant current circuit 209, voltage dividing resistors R21 and R22 for detecting a voltage between the sensor lines LA and CA are connected, and the voltage AI divided by the resistors R21 and R22 is transmitted to the transmission IC.
The data is fetched by the A / D converter 204 a in the memory 204.
Here, it is configured that, for example, when the voltage AI is 3 V, it is detected as “disconnection”, when 2 V is “normal”, and when 1 V is “fire”, it is detected. A series circuit of a phototransistor 213b of the test OK photocoupler and a phototransistor 214b of the photocoupler under test is connected to a stage subsequent to the resistors R21 and R22, and a zener diode 215 is connected in parallel to the phototransistor 213b.

Here, when the circuit shown in FIG. 8 is disconnected from the sensor lines LA and CA during the operation test of the sensor described later, the phototransistor 214b is controlled to be turned on,
The series impedance of the phototransistor 214b and the Zener diode 215 is set so that the voltage AI becomes 2 V, that is, “normal”. Test O
The photodiode 213a of the K photocoupler is shown in the normal end detection circuit 255, and the photodiode 214a of the photocoupler under test is connected in parallel with the test relay coil L.

The subsequent stage of the phototransistors 213b and 214b is connected to the sensor line L via the test relay contacts La and Lb.
A and CA are connected to the terminals, and a plurality of fire detection terminals 2 in the dwelling unit are connected in parallel to the terminals. The test relay contacts La and Lb connect the sensor lines LA and CA to the phototransistors 213b and 214b except during the test, and connect to the fire detection circuit 250 and the recovery control unit 251 shown in the lower stage during the test. Is done. Terminating detector line L returned from the last stage fire detecting terminal 2 in the dwelling unit
B and CB are connected to the terminator 216.

The terminator 216 is a Zener diode 216
a, 216b and a resistor 216c are connected in series, and the voltage AI becomes 2 V or “normal” when the sensor lines LA and CA are not disconnected, and the voltage AI is 3 V when the sensor lines LA and CA are disconnected. It is set to be "disconnected". Next, the automatic inspection circuit 42 on the lower side of the repeater 200 shown in FIG. 9 will be described in detail. This circuit schematically includes a fire detection unit 250 and a recovery control unit 251.
, A recovery signal generation unit 252, a test relay control unit 253 according to a command from the receiver 1, a test relay control unit 254 by the checker 44, a normal end detection unit 255, and a 20V constant voltage circuit for generating a test voltage. 257 and the phototransistor 2 of the test relay coil L and the photocoupler under test
14a and the like. Note that the transfer circuit 256 has a function of transferring a signal from the fire detection terminal 2 to another device.

The configuration of these circuits will be described together with the operation. When the photodiode 206a of the fire test photocoupler is turned on under the control of the transmission IC 204, the phototransistor 206b in the test relay control unit 253 is turned on, the transistors 261 and 262 are turned on, and +2
The test voltage of 0 V is applied to the transistor 262 and the operation test line QA.
Is applied to the first stage fire detection terminal 2 in the dwelling unit.

The test relay coil L and the photodiode 214a of the photocoupler under test are energized to connect the detector lines LA and CA to the fire detection circuit 250 and the recovery controller 251 via the test relay contacts La and Lb. And the phototransistor 214 of the photocoupler under test.
a turns on. Therefore, the phototransistor 21
Since the voltage AI becomes 2 V, that is, “normal” due to the series impedance of the Zener diode 4b and the Zener diode 215, the transmission IC 204 does not send the disconnection information to the receiver 1 even if the detector lines LA and CA are disconnected.

The detector lines LA and CA are connected to the test relay contact L
a, Lb via the fire detection circuit 250 and the recovery control unit 2
When connected to the 51 side, a “normal monitoring” current of 7 mA is applied to the sensor lines LA and CA via the transistor 251 a in the recovery control unit 251 and the fire detection circuit 250. Here, as described above, each of the plurality of fire detection terminals 2 in the dwelling unit sequentially outputs an alarm signal to the detector lines LA and LB when the test voltage is applied, and when it is normal,
If normal, this test voltage is applied to the fire detection terminal 2
And relay them sequentially. Further, when all the fire detecting terminals 2 in the dwelling unit are normal, the test voltage returns to the operation test line QB.

Therefore, when one of the plurality of fire detecting terminals 2 issues an alarm, a high-level fire signal is output from the fire detection circuit 250, and the recovery signal generation unit 252 is delayed by a predetermined time from the rise of the fire signal. Outputs a recovery pulse. The recovery controller 251 turns on the transistor 251b and turns off the transistor 251a in response to the recovery pulse, thereby cutting the lines LA and LB of the detectors, and recovering the fire detecting terminal 2 that has issued the alarm.

In this way, each of the plurality of fire detection terminals 2 in the dwelling unit is sequentially tested, and when all are normal, when the test voltage returns to the operation test line QB, the normal end detection unit 255
Test OK photocoupler photodiode 213a
Lights up, and the phototransistor 213b is turned on.
Therefore, both ends of the voltage dividing resistors R21 and R22 are short-circuited by the phototransistors 213b and 214b, and the voltage AI divided by the voltage dividing resistors R21 and R22 is “fire”.
In this state, the transmission IC 204 can detect from the voltage AI that all the fire detection terminals 2 in the dwelling unit are normal. 4. Operations of Receiver and Repeater (FIGS. 10 and 11) Next, operations of the receiver 1 and the repeater 200 will be described with reference to FIGS. 10 and 11, respectively. First, as shown in FIG. 10, in the receiver 1, when the test switch of the operation unit 103 is operated, the repeater address counter is set to "1" and the test of the repeater is displayed (step S10).
Next, a test command including the address is transmitted (step S11).

Then, an NG timer for measuring a predetermined time until the fire command is returned from the repeater 200 at the address is set (step S12), and the fire command is returned until the NG timer times out. If so, a normal display of the repeater is performed (steps S13 → S14 → S15). On the other hand, if the fire command is not returned before the NG timer times out, an error display of the repeater is performed (step S13 → S
16).

Next, the repeater address counter is set to "1".
Increment (step S12), all the repeaters 2
If the test for 00 has not been completed, step S
From 18, the process returns to step S <b> 11, and the test for the next repeater 200 is performed. When the tests on all the repeaters 200 are completed, the test process is completed. Each repeater 20
At 0, as shown in FIG. 11, when a self-addressed test command transmitted from the receiver 1 is received (step S21),
The transmission IC 204 is a fire test photocoupler (206a,
06b) is driven (step S22), and the test voltage is output to the QA terminal by the test relay control unit 253 (step S23). Next, the operation of one fire sensing terminal 2, that is, an alarm is detected by the fire detection unit 250 (steps S24 and S25).

When the fire detection unit 250 detects a fire, it outputs a fire signal to the restoration signal generation unit 252 (step S2).
6), the recovery signal generator 252 sends a recovery (line cut) signal to the recovery controller 251 in response to the fire signal, and the transistor 251b of the recovery controller 251 is turned off only while the line cut signal is on (step S27). ).
Accordingly, the fire detecting terminal 2 that has issued the alarm due to the momentary interruption of the sensor lines LA and LB is restored, and the inspection signal (test voltage) is relayed to the next stage fire detecting terminal 2 (step S2).
8).

Next, if the normal end detecting section 255 does not detect the signal returning to the test terminal QB, the process proceeds to step S
Returning to step 24, the test of the fire detection terminal 2 at the next stage is performed (steps S29 → S30 → S24). Then, when the fire detection terminals 2 of the plurality of stages are sequentially tested in this way and the normal end detection unit 255 detects a signal returning to the test terminal QB, the test OK photocouplers (213a, 213b) are turned on, A fire occurs between the sensor lines LA and LB (step S30 → S31).

Then, the transmission IC 204 detects the fire and transmits a fire signal including its own address and type to the receiver 1 (step S32). When the receiver 1 receives this fire signal, it connects to the repeater 200. It is determined that all the fire detection terminals 2 performed are normal, and the test processing is terminated (step S33). Therefore, in the receiver 1, all the fire detection terminals 2 in each dwelling unit are normal repeaters 200 and any of the fire detection terminals 2 in the dwelling units are abnormal repeaters 20.
The inspection can be performed by turning on or off the test lamp of the display unit 104 so that 0 can be visually identified.

In this circuit configuration, if any one of the plurality of fire detecting terminals 2 in the dwelling unit is not normal, it is not possible to detect which of the fire detecting terminals 2 is not normal. A connector 43 for connecting an inspection device 44 to specify the sensing terminal 2 from outside.
And a test relay control unit 254 provided by the checker 44. The test relay control unit 254 has an inspection caution light 25
4a and a transistor 254b for driving the test relay L by being turned on by a test signal from the checker 44 are provided. Connector 43 and checker 44 (FIG. 1)
3) include terminals LA and CA connected to the sensor lines LA and CA via the test relay contacts La and Lb, and terminals LB and CB connected to the sensor lines LB and CB for termination.
And a terminal Q1 connected to the test relay control unit 254;
Terminals QA and QB connected to operation test lines QA and QB,
A power terminal (24 V), a ground terminal (0 V), and the like are provided.

In the above-described embodiment, the disaster prevention monitoring device in an apartment house has been described as an example. However, the present invention is not limited to an apartment house but can be applied to general building facilities. In addition, as shown in FIG. 8, a circuit for detecting an alarm signal from the fire detection terminal 2 or a disconnection of the detector lines LA and CA and an automatic inspection circuit 42 shown in FIG. As described above, in a system in which the repeater 200 is omitted and the receiver 1 and the fire detection terminal 2 are directly connected, the receiver 1 is provided. 5. Inspection Device (FIGS. 12 to 14) Next, the configuration of the inspection device 44 will be described with reference to FIGS. FIG. 12 is an external view of the repeater 200 and the outdoor inspection device 44. Reference numeral 200 denotes the repeater, and the repeater 200 is embedded in a wall surface such as an upper part of a door of each dwelling unit. Repeater 2
00, a door 218 is provided to be openable and closable. When the door 218 is opened, the connector 43 and the inspection caution light 25 are opened.
4a appears.

The connector 321 of the outdoor inspector 17 is connected to the connector 43 when the outdoor detector 33 inspects the fire detecting terminal 2. The inspection caution light 220 is provided in the vicinity of the connector 43 in order to warn the inspector not to disconnect the connector 321 of the outdoor inspector 44 from the connector 43 of the repeater 200 by mistake during the inspection. . In addition, an outdoor indicator light 211 for displaying a fire alarm is provided at the front center of the repeater 200.

The outdoor inspection device 44 is composed of a power supply unit 322 and an inspection device main body 323.
Is connected to the inspector main body 323 via the cable 324. Reference numeral 325 denotes a sensor test switch provided on the inspector main body 323. When the sensor test switch 325 is turned on, inspection of the fire detecting terminal 2 is started. A function check switch 303 provided on the checker main body 323 checks the function of the repeater 200 when the function check switch 303 is turned on.

Reference numeral 326 denotes a normal / abnormal indicator lamp provided on the inspector main body 323 by 1 to n units.
6 sequentially displays whether the inspection result of each of the plurality of fire detecting terminals 2 in the dwelling unit is normal or abnormal. Reference numeral 327 denotes a buzzer as a sounding unit. The buzzer 327 notifies the checker of the inspection result of the fire detecting terminal 2 by a buzzer sound. 32
Reference numeral 8 denotes an under-inspection lamp that indicates that the inspection is being performed, and the under-inspection lamp 328 flashes during the inspection and is turned on when the inspection is completed.

Reference numeral 329 denotes a power switch. When the power switch 329 is turned on, power is supplied to the internal circuit of the outdoor inspection device 44. Reference numeral 330 denotes a first power lamp, and the first power lamp 330 indicates that power has been input from the repeater 200. Reference numeral 331 denotes a second power lamp. The second power lamp 331 indicates whether the power switch 329 is on or off.

An AC power supply connector 332 is drawn out of the power supply unit 322, and AC power is supplied to the power supply unit 322 via the AC power supply connector 332, and is converted into DC by the power supply unit 322. A DC battery (BATT) 333 is housed in the power supply unit 322 so that inspection can be performed even during a power failure or in a place where there is no AC power supply.

FIG. 13 is a diagram showing an example of the internal configuration of the outdoor inspection device 44. In FIG. 13, reference numeral 381 denotes the outdoor inspection device 44.
And a control unit including a CPU provided in the control unit.
81 includes a sensor test unit 382 and a test relay drive circuit 38.
3, an operation / display unit 384, a transfer output unit 385, a dip (DIP) switch (SW) 386, and a power supply unit 387 are provided. The outdoor inspection device 44 has a terminal QB, a terminal QA, a terminal LB, a terminal CB, a terminal LA, a terminal CA, test terminals Q1 +, Q1-, and a terminal V, and corresponds to each of the connectors 43 on the repeater 200 side. Connected to terminal. The fire detection terminal 2 is inspected by connecting the outdoor inspection device 44 to the repeater 200.

When the control section 381 outputs a test signal to the test relay drive circuit 383, the test relay drive circuit 383 transmits the drive signal via the test terminal Q1 + to the relay 2 shown in FIG.
The transistor 25 in the test relay control unit 254 in 00
4b to turn on the test relay L. As a result, in the repeater 200, the sensor lines LA and CA are switched to the connector terminals LA and CA.

In this case, on the repeater 200 side, the receiver 1
The transistor 261 of the test relay control unit 253 according to the command from the controller 200 is off, and the test power is not applied to the fire detection terminal 2 from the repeater 200. Also, the detector line L
Alarm signals from A and CA are diodes D251 and D25.
2 is not detected by the fire detection circuit 251 and the test voltage returned from the operation test line QB is equal to diodes D253 and D253.
254 is not detected by the normal end detecting unit 255.

Referring to FIG. 13, the sensor test section 382 includes a test voltage control circuit 388, a fire detection circuit 389, an L-line voltage control circuit 390, and a voltage detection circuit 391. Upon receiving the inspection start signal from the control unit 381, the test voltage control circuit 388 controls the test voltage and sends an inspection signal, for example, 20 V, to the fire detection terminal 2 via the terminal QA.
Is output. The fire detection circuit 389 detects an alarm signal from the fire detecting terminal 2 which has been falsely generated by the inspection signal (test voltage) between the terminals LA and CA, and outputs the alarm signal to the controller 38.
Send to 1. When receiving the restoration signal from the control unit 381, the L-line voltage control circuit 390 restores the sensor lines LA and CA, and the voltage detection circuit 391 detects the inspection signal via the terminal QB to determine the end of the test. Then, a test end signal is sent to the control unit 381.

The operation / display unit 384 is composed of the plurality of normal / abnormal indicator lights 326, the inspection lamp 328, the buzzer 327, and the sensor test switch 325. When the sensor test switch 325 is manually turned on, it outputs an inspection start signal to the control unit 381.
The inspection lamp 328 flashes in response to an inspection start signal from the control unit 381 and lights up in response to a test end signal to indicate that the inspection has been completed.

The normal / abnormal display lamp 326 sequentially displays the normal or abnormal state of each of the plurality of fire detecting terminals 2 in response to the alarm signal from the control unit 381. The buzzer 327 notifies the normal or abnormal by the buzzer sound according to the alarm signal from the control unit 381. The transfer output unit 385 is composed of a plurality of normal / abnormal display transfer output units 392 each composed of a photocoupler, and an under-check transfer output unit 393 composed of a photocoupler.

The normal / abnormal display notification output section 392 outputs a normal or abnormal signal to a display means such as a printer in response to an alarm signal from the control section 381, and the in-inspection notification output section 393 controls the control section 381. The inspection start signal and the test end signal from the server inform that other inspection means are being inspected. The power supply 387 has a voltage of, for example, 24 V from the terminal V.
Is supplied, and the first power lamp 330 is turned on. When the power switch 329 is turned on, the power relay 394
Operates.

When the relay switch 395 switches the contact 396 to the contact 397 by the operation of the power supply relay 394, the power supply circuit 398 composed of a switching regulator
Supplies a predetermined voltage to the sensor test unit 382, the control unit 381, the operation / display unit 384, and the like, and at the same time, the second power lamp 331 is turned on. The dip switch 386 is used for switching the operation mode. In the automatic mode, 1 to n fire detecting terminals 2 are automatically and sequentially inspected, and in the manual mode, the fire detecting terminals 2 are manually inspected one by one.

Reference numeral 322 denotes the power supply unit. The power supply unit 322 includes a connector 399 provided on the power supply unit 322 side and a connector 3 provided on the outdoor inspection device 44 side.
00 is connected to the inspector main body 323. An AC / DC converter 301 is provided in the power supply unit 322. The AC / DC converter 301 converts AC power input through an AC power connector 332 into DC, and supplies the DC power to the power supply unit 387 through the connectors 300 and 399. I do.

The DC battery 333 is charged by the AC / DC converter 301, and when a power failure occurs, the DC power is supplied to the power supply unit 38 by turning on the power switch 302.
7 A function check switch 303 checks the function of the repeater 200 by short-circuiting the terminals LB and CB. Next, the operation will be described. FIG.
Is a flowchart for explaining the operation of the outdoor inspection device 44.

In FIG. 14, first, the DIP switch 386 is set to the automatic inspection mode,
In order to check the fire detection terminal 2 at 1, the relay 20
0 is connected to the outdoor inspection device 44. That is, the connector 321 of the outdoor inspection device 44 is inserted into the connector 43 of the repeater 200. For example, a voltage of 24 V from the terminal V
7 and the first power supply unit 330 is turned on.

When the power switch 329 is turned on in step S42, the power relay 394 is operated, and the relay switch 395 is switched from the contact 396 to the contact 397.
A predetermined voltage is supplied from the power supply circuit 398 to the sensor test unit 382,
The power is supplied to the control unit 381, the operation / display unit 384, and the like, and the second power lamp 331 is turned on. Next, step S4
When the sensor test switch 325 is turned on in step S3, the control unit 381 outputs a test signal to the test relay drive circuit 383 in step S44, and the test relay drive circuit 383 outputs the drive signal for the test relay L in the repeater 200 in step S45. Is output. The control unit 381 operates the inspection start signal /
Inspection lamp 328 and display output unit 385 of display unit 384
Is output to the in-inspection report output unit 393, the under-inspection lamp 328 of the operation / display unit 384 blinks to indicate that the inspection is being performed until it is turned on. The under-report output unit 393 of the report output unit 385 also reports that the check is being performed.

On the other hand, when the repeater 200 receives a drive signal from the test relay drive circuit 383, the test relay L is activated, and the detector lines LA and CA are connected to the connector terminals LA and CA.
Switch to the side. Next, in step S46, the control unit 381
Outputs a check signal to the test voltage control circuit 388, the test voltage control circuit 388 controls the test voltage, and outputs a check signal (test voltage) to the fire detection terminal 2. In response to the inspection signal, the fire detection terminal 2 simulates an alarm and outputs an alarm signal to the outdoor inspector 44. In step S47, the fire detection circuit 389 detects this and outputs an alarm signal to the control unit 381. I do.

In response to the alarm signal from the control unit 381, the normal / abnormal indicator light 3 of the operation / display unit 384 in step S48.
Reference numeral 26 indicates normal, and the normal / abnormal display transfer output unit 392 of the transfer output unit 385 transfers and outputs normal. Next, when the control unit 381 outputs a restoration signal to the L-line voltage control circuit 390 in step S49, the L-line voltage control circuit 390 performs restoration of the sensor lines LA and CA. When the fire detection terminal 2 is restored, an inspection signal is output to the next fire detection terminal 2.

On the other hand, if the fire detecting terminal 2 does not issue an alarm within the predetermined time, the normal / abnormal indicator lamp 326 displays an abnormality in step S50, and the normal / abnormal display shift of the alarm output unit 385 is performed. The notification output unit 392 outputs and reports the abnormality.
Next, in step S51, when the control unit 381 outputs a forced recovery signal to the test voltage control circuit 388, the test voltage control circuit 388 outputs a relatively high level of the forced recovery voltage to the operation test line QA, so that no alarm is issued. The fire detection terminal 2 is forcibly restored, and when this forced restoration is performed, an inspection signal is output to the next fire detection terminal 2.

Thus, the normal / abnormal indicator light 326,
The normal / abnormal display notification output section 392 sequentially displays normal or abnormal, and the inspection of all the fire detecting terminals 2 connected to the repeater 200 is completed. Upon returning from Step 2 and detecting the voltage by the voltage detection circuit 391 in Step S52, a test end signal is sent to the control unit 381.

In response to the test end signal, the control unit 381 turns on the lighting lamp 328 and the inspection notification output unit 393 in step S53.
Is turned on to indicate that the inspection has been completed. In the above-described embodiment, the forcible restoration and detection of the fire detecting terminal 2 that does not issue a warning at the time of the test is performed only by the checker 44, so that the repeater 200 can be configured at low cost. The inspection device 200 may perform the same operation as the inspection device 44. In this case, if the repeater 200 detects the fire sensing terminal 2 that does not emit the alarm, transmits the data to the receiver 1, and displays the data on the display unit 104 of the receiver 1,
Even if the inspector does not go around each dwelling unit with the checker 44, the fire detection terminal 2 that does not emit an alarm from each dwelling unit can be specified at the installation location of the receiver 1.

In this configuration, each time the repeater 200 receives the alarm signal from the fire detection terminal 2, the automatic recovery is performed, and the operation test of the fire detection terminal 2 at which stage is currently performed. Can be detected by the number of short circuits of the sensor lines LA and CA. Then, the repeater 200 receives an alarm signal from a certain fire detecting terminal 2 and restores the fire detecting terminal 2, and within a predetermined time after the recovery, an alarm from the next stage fire detecting terminal 2 is issued. When a signal is not received, a relatively high level forced recovery pulse is applied to the operation test lines QA and QB.
For a predetermined time, an operation test of the fire detection terminal 2 at the next stage can be performed.

In the above embodiment, when the inspection device 44 (and the relay device 200) does not receive the alarm signal from the fire detecting terminal 2 within a predetermined time, the inspection device 44 outputs a relatively high level of the forced recovery pulse. However, a relatively high level forced recovery pulse may be output when the test power is not received from the fire detection terminal 2 at the last stage. Further, in the above embodiment, the inspection device in the apartment house is taken as an example, but the present invention is not limited to the apartment house,
Applicable to general building facilities.

[0081]

As described above, in the disaster prevention monitoring device according to the present invention, the fire and disconnection detecting means detects a disconnection state, a normal state, and a fire state by a change in the impedance of the detector line. When the fire and disconnection detection means is disconnected from the sensor line during the operation test, the detection impedance of the fire and disconnection detection means is switched to the normal state, so the fire and disconnection detection means is disconnected from the sensor line. Even if the disconnection state is not detected, it is possible to prevent the transmission of the disconnection information and perform the operation test with a simple operation.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of a disaster prevention monitoring device according to the present invention.

FIG. 2 is a timing chart showing a data transmission sequence of the receiver and the repeater of FIG. 1;

FIG. 3 is an explanatory diagram showing a format transmitted by the receiver of FIG. 1;

FIG. 4 is an explanatory diagram showing a format returned by the repeater in FIG. 1;

FIG. 5 is a circuit diagram showing a heat detector as an example of the fire detection terminal of FIG. 1;

6 is a circuit diagram showing another example of the test circuit of FIG.

FIG. 7 is a circuit diagram showing a photoelectric smoke detector as another example of the fire detection terminal of FIG. 1;

FIG. 8 is a circuit diagram showing the repeater of FIG. 1 in detail;

FIG. 9 is a circuit diagram showing the repeater of FIG. 1 in detail.

FIG. 10 is a flowchart for explaining the operation of the receiver in FIG. 1;

FIG. 11 is a flowchart for explaining the operation of the repeater of FIGS. 1, 8 and 9;

FIG. 12 is an external view showing the repeater and the inspection device shown in FIGS. 1, 8, and 9;

FIG. 13 is a circuit diagram showing the inspection device of FIGS. 1 and 12 in detail.

FIG. 14 is a flowchart for explaining the operation of the inspection device of FIG. 13;

[Explanation of symbols]

LA, CA, LB, CB: Sensor line QA, QB: Operation test line V: Power supply line S, SC: Signal line 1: Receiver 2: Fire detection terminal 3: Power supply 4: Operation output 5: Constant Voltage circuit 6: Switching unit 7: Comparison circuit 8: Reference value setting circuit 9: Temperature sensing unit 10: Test switch unit 16: Switch circuit 17, 17a: Forced restoration circuit 18: Alarm detection circuit 27: Operation indicator lamp circuit 28 : Rectifier circuit / Noise absorption circuit 29: Switching circuit 30: Constant voltage / current limiting circuit 31: Counting circuit 32: Oscillation circuit 33: Amplifier circuit 34: Comparison circuit 42: Automatic inspection circuit 43: Connector 44: Inspection device OP: Operational amplifier Q4, Q5: FET R, R0 to R19, 9b, R21, R22: resistor 9a: thermistor C1 to C3: capacitor D5: light receiving element D6: light emitting element D7: test Light emitting element for use 200: repeater 201: transmission / reception circuit 202: 3.2V constant voltage circuit 203: monitor LED 204: transmission IC 204a: A / D converter 205: address / type setting circuit 206a, 212a, 213a, 214a: photodiode 207, 257: 20V constant voltage circuit 208: 35V step-up circuit 209: Constant voltage circuit 210: Control voltage monitoring circuit 211: Outdoor indicator light 206b, 212b, 213b, 214b: Phototransistor 215, D253, 216a, 216b: Zener diode 216 : Terminator 216c: Resistance 250: Fire detection circuit 251: Restoration control unit 251a, 251b, 254b, 261, 262: Transistor 252: Restoration signal generation unit 253: Test relay control unit based on command from receiver 254: Inspection unit Test relay control unit 254a: Inspection caution light 255: Normal end detection unit 256: Transfer circuit D251, D252, D254: Diode L: Test relay coil La, Lb: Test relay contact 321: Connector 322: Power supply unit 323: Inspection Main unit 324: Cable 325: Sensor test switch 326: Normal / abnormal indicator light 327: Buzzer 328: Inspection lamp 329: Power switch 330: First power lamp 331: Second power lamp 332: AC power connector 333: DC battery 381: control unit 382: sensor test unit 383: test relay drive circuit 384: operation / display unit 385: transfer output unit 386: dip switch 387: power supply unit 388: test voltage control circuit 389: fire detection circuit 390: L line Voltage control circuit 391: Voltage detection circuit 392: Normal / abnormal display transfer paper output section 393: inspection during transfer paper output unit 394: power supply relay 395: relay switches 396,397: Contact 398: power circuit 399,300: connector 302: Power Switch 303: Function test switch

Continuation of the front page (56) References JP-A-56-79393 (JP, A) JP-A-63-5496 (JP, A) JP-A-53-33599 (JP, A) JP-A-56-122193 (JP, A) (U, U) J6-30889 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) G08B 29/04 G08B 17/00 G08B 25/00 520 G08B 29/06

Claims (5)

(57) [Claims] 1. A disconnection state due to a voltage change of a sensor line,
A fire and disconnection detecting means for detecting a normal state and a fire state, and a terminator connected to the end of the sensor line so that the detection voltage of the fire and disconnection detecting means becomes disconnected when the sensor line is disconnected. An automatic inspection means for remotely testing and operating a fire detection terminal connected to the sensor line; and the automatic inspection by separating the sensor line from the fire and disconnection detection means during an operation test of the fire detection terminal. A detector line switching means for switching to the means, and a detection voltage of the fire and disconnection detection means when the sensor line is disconnected from the fire and disconnection detection means by the sensor line switching means. A disaster prevention monitoring device having impedance switching means for switching. 2. A disaster prevention monitoring device in which an inspector for remotely testing and operating a fire detection terminal can be connected to a sensor line, wherein a disconnection state, a normal state, and a fire state are detected by a voltage change of the detector line. Fire and disconnection detecting means; a terminator connected to the end of the sensor line so that the detection voltage of the fire and disconnection detecting means becomes disconnected when the sensor line is disconnected; A detector line switching means for disconnecting the sensor line from the fire and disconnection detecting means and switching to the inspection device at the time; and a fire when the detector line is disconnected from the fire and disconnection detecting means by the switching means. And an impedance switching means for switching the detection voltage of the disconnection detection means to a normal state. 3. The disaster prevention monitoring device according to claim 1, wherein the impedance switching unit is turned on when the sensor line is disconnected from the fire and disconnection detection unit by the sensor line switching unit. A disaster prevention monitoring device, wherein the detector line is short-circuited by a photocoupler. 4. The disaster prevention monitoring device according to claim 1, wherein a single on-off type fire detecting terminal is installed for each predetermined monitoring area, and the fire detecting terminal includes a relay line and a relay. Loop-connected via an operation test line, a receiver transmits a test command including its address to the repeater during an operation test of the fire detection terminal, and the repeater receives the test command and receives the test command. Detector line switching means provided in the repeater disconnects the sensor line from the fire and disconnection detection means and switches to the automatic inspection means, and the automatic inspection means switches the test voltage through the starting end of the operation test line. The test voltage is applied to the sensor, and when the fire detection terminal issues an alarm based on the test voltage, the test voltage is returned to the repeater via the end of the operation test line, and the test voltage is generated from the fire terminal. Disaster prevention monitoring apparatus characterized by returning the data to the receiver the fire detector when detecting through the end of the test line is judged to be normal. 5. The disaster prevention monitoring device according to claim 1, wherein a plurality of on-off type fire detecting terminals are installed for each predetermined monitoring area, and a relay device is connected to the fire detecting terminal and operates. Connected via a test line, a receiver transmits a test command including its address to the repeater during an operation test of the fire detection terminal, and the repeater receives the test command and receives the test command. Sensor line switching means provided in the fire and disconnection detection means to disconnect the sensor line and switch to the automatic inspection means,
The automatic inspection means applies a test voltage to the first stage fire detection terminal through the start end of the operation test line, and when each fire detection terminal issues an alarm based on the test voltage, the test voltage is applied to the next stage fire detection terminal. Relaying to the terminal, the final stage fire detecting terminal returns the test voltage to the repeater, and when detecting the test voltage from the final stage fire detecting terminal, all the fire detecting terminals are determined to be normal. And transmitting the data to the receiver.