JPH06282786A - Disaster prevention monitor - Google Patents

Abstract

PURPOSE:To prevent transmission of the wrong information carried out through a terminal after detection of the fault of a power line set at the receiver side when at least a power line, a signal line and common line are drawn out of the receiver side of connection of a terminal. CONSTITUTION:A terminal 2 is provided with a primary line monitoring part 4 which detects the primary line voltage of a power line 2 led from a receiver means 1, a secondary line monitor 5 which detects the secondary line voltage of a signal line set at the side of a detector 3, a deciding part 6 which decides a primary line fault from the detected voltage of a primary line monitoring part 7 and also decides a secondary line fault or a fire from the detected voltage of the part 5, a terminal answering part 7 which answers the deciding result of the part 6 to the call given from the means 1, and an inhibiting part 8 which inhibits the decision of the fire and the line fault that are done based on the secondary line voltage when the primary line fault is decided by the part 6.

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 apparatus for drawing out a dedicated power line from a receiver in addition to a signal line to connect a terminal and collecting and controlling information of the terminal by calling from the receiving side.

[0002]

2. Description of the Related Art In a conventional disaster prevention monitoring device, a pair of power source / signal lines which also serve as a power source line is drawn from a receiver to connect a terminal, and at the same time as supplying power to the terminal, the terminal from the receiver is connected. A calling signal in which addresses are sequentially specified is transmitted, and a terminal that has determined that the address matches its own address responds by transmitting detection information from a detector such as a fire detector connected to itself.

Further, in a control terminal connected to a load such as a district bell, a control signal is received from a receiver which designates a terminal address to ring the district bell. However, if the number of detectors and loads connected to the terminal increases, it will not be possible to supply power only by the signal line that also serves as the power source. Connect the terminal by pulling out a dedicated power line.

[0004]

However, in a disaster prevention monitoring device in which a terminal is connected by pulling out a dedicated power line from the receiver in addition to the signal line, the signal line supplying power to the terminal CPU is Even if it is normal, if the power supply line that supplies power to the terminal's detector or control load has a line failure such as a disconnection or short circuit, and the supply voltage fluctuates and becomes unstable, it is monitored by the terminal CPU. It affects the detection voltage of the active detector and the state monitoring voltage of the control load.

For this reason, the terminal CPU may erroneously determine that the detection voltage has dropped as fire detection by an on / off sensor,
In the case of control load, the line voltage drops and it is mistakenly judged as a short circuit,
There is a risk that incorrect information may be transmitted to the receiver side through a normal signal line. The present invention has been made in view of such conventional problems, and at least a power supply line from the receiver side,
An object of the present invention is to provide a highly reliable disaster prevention monitoring device that detects abnormalities in the power line on the receiver side and prevents erroneous information transmission by the terminal when the terminal is connected by pulling out the signal line and common line. And

[0006]

FIG. 1 is a diagram for explaining the principle of the present invention. First, according to the present invention, one or a plurality of terminals 2 are connected to a transmission line having at least a power supply line BB, a signal line S and a common line SC drawn from the receiving means 1, and the terminal 2
Is for a disaster prevention monitoring device in which the detector 3 is connected to a signal line and an address is designated from the receiving means 1 to collect detection information of a specific terminal 2.

According to the present invention for such a disaster prevention monitoring device, the terminal 2 has a primary line monitoring section 4 for detecting the primary line voltage of the power supply line BB from the receiving means 1 and a detector 3 side. A secondary line monitoring unit 5 for detecting the secondary line voltage of the signal line,
Call from the receiving unit 1 and a judging unit 6 for judging a primary line fault from the detected voltage of the primary line monitoring unit 4 and for issuing an alarm or a secondary line fault from the detected voltage of the secondary line voltage detecting unit 5. To the terminal response unit 7 that responds to the determination result of the determination unit 6, and a prohibition unit 8 that prohibits the determination of fire and line fault based on the secondary line voltage when the determination unit 6 determines the primary line fault. It is characterized by being provided.

When the terminal 2 connects the control load 9 to the signal line, the terminal 2 has a primary line monitoring unit 4 for detecting the primary line voltage of the power line from the receiving means, and a load side. The secondary line monitoring unit 5 that detects the secondary line voltage of the signal line, and the primary line fault is determined from the detection voltage of the primary line monitoring unit 4, and the secondary line fault is detected from the detection voltage of the secondary line voltage detection unit. Determination unit 6, which determines whether or not there is a call, a terminal response unit 7 that responds to the call from the receiving unit 1 with the determination result of the determination unit 6, and the determination unit 6
And a prohibiting unit 8 for prohibiting the determination of the line fault based on the secondary line voltage when the primary line fault is judged in Step 1.

Here, the judging unit 6 of the terminal 2 holds the judgment results of the primary line voltage and the secondary line voltage in the memory based on the sampling command signal transmitted from the receiving unit 1 at constant intervals, and the receiving unit When the self-address matches the calling address from 1, the determination result stored in the memory is transmitted as a response. Further, when the judgment unit 6 judges the primary line fault, the terminal response unit 7 makes no response to the calling command signal from the reception unit 1, and the reception unit 1 after the non-response.
Responds to the failure inquiry command signal from the occurrence of the primary line failure. In response to this, the receiving means 1 transmits a failure inquiry command signal when there is no response at the time of transmitting the terminal call command signal.

Further, if the receiving means 1 is composed of only a receiver, and comprises one or a plurality of relay boards as local receivers connected to the transmission path from the receiver,
Alternatively, it includes a case where only a relay board as a plurality of local receivers connected to each other by a transmission path is included.

[0011]

According to the disaster prevention monitoring apparatus of the present invention having such a configuration, the power supply line between the receiver and the terminal is short-circuited or disconnected,
Furthermore, if a voltage fluctuation due to a decrease in line impedance occurs and it is determined that there is a primary line fault, a fire determination or disconnection based on the detection voltage of the detector connected to the signal line from the terminal,
Judgment of secondary line failure due to short circuit is prohibited.

Therefore, even if the influence of the power supply voltage due to the line fault of the primary side power line extends to the secondary line connecting the detector and the control load, the terminal CPU makes an error such as a fire judgment or a secondary line fault. However, the actual primary line failure can be sent to the receiver and dealt with.

[0013]

FIG. 2 is a block diagram of an embodiment showing the overall structure of the present invention. In FIG. 2, reference numeral 10 denotes a receiver, and the sensor repeater 1 is provided on the transmission line 12 drawn from the receiver 10.
4, the analog smoke sensor 16, the analog heat sensor 18, and the control relay 20 are connected. The transmission line 12 from the receiver 10 is composed of at least three power lines BB, signal lines S, and common lines SC.

Repeater 14 for sensor and repeater 20 for control
Is connected to the power line BB, the signal line S and the common line SC, and the analog smoke sensor 16 and the analog heat sensor 18 are connected to the signal line S and the common line SC. A detector line 22 is drawn from the detector repeater 14, and an on / off detector 24 and a transmitter 26 for sending a fire signal by a switch operation are connected to the detector line 22.

A power supply voltage based on a power supply line BB from the receiver 10 is supplied to the sensor line 22. In addition, a control load 30 such as a district bell and smoke control equipment is connected to a control line 28 from the control repeater 20. The power supply of the drive voltage to the control line 28 is also performed based on the power line BB from the receiver 10. Here, the power supply line BB on the receiver 10 side is the primary line when viewed from the sensor repeater 14 and the control repeater 20, and the sensor line 22 on the on / off sensor 24 side and the control line 28 on the control load 30 side. Is defined as a secondary line.

The receiver 10 has a control section 32 using a CPU.
The control unit 32 is provided with a display unit 34, an operation unit 36, and a ringing unit 38 for outputting an alarm or a voice message. The control unit 32 of the receiver 10 is provided with the following functions realized by the program control of the CPU. A calling function that collects terminal information by sending a calling command that sequentially specifies the terminal addresses of the sensor repeater 14, the analog smoke sensor 16, the analog heat sensor 18, and the control repeater 20.

A control function for sending a control command in which the terminal addresses of the sensor repeater 14, the analog smoke sensor 16, the analog heat sensor 18, and the control repeater 20 are sequentially specified to perform a sensor test and load control. A batch A / D conversion function that sends a sampling command at regular intervals to collect terminal information all at once.

A function of transmitting a failure inquiry command and collecting failure information in the next call when there is no response to the call command transmission. An interrupt processing function based on the reception of an interrupt signal from the terminal due to fire detection. On the other hand, as represented by the sensor repeater 14, a primary line monitoring unit 4, a secondary line monitoring unit 5, a determination unit 6, a terminal response unit 7, and a prohibition unit 8 are provided on the terminal side.

The primary line monitoring unit 4 detects the primary line voltage of the power line BB from the receiver 1. Secondary track monitoring unit 5
Detects the secondary line voltage of the sensor line 22 on the side of the on / off sensor 24. The determination unit 6 determines the primary line fault from the detection voltage of the primary line monitoring unit 4 and the fire or the secondary line fault from the detection voltage of the secondary line voltage detection unit 5.

The processes of the primary line monitoring unit 4, the secondary line monitoring unit 5, and the judging unit 6 are performed when the sampling command for AD conversion is received from the receiver 10. The terminal response unit 7
In response to the transmission of the call command specifying the self-address from the receiver 10, the terminal information including the determination result of the determination unit 6 is responded. Further, the prohibition unit 8 determines when the determination unit 6 determines the primary line fault, that is, when the abnormality of the power supply line BB is detected.
The judgment unit 6 prohibits the judgment of fire and the judgment of a line fault related to the detector line 22.

Further, the terminal response unit 7 does not respond to the call from the receiver 10 with respect to the determination result of the primary line fault and the secondary line fault. Further, when the determination unit 6 detects a drop in the line voltage due to the alarming operation of the on / off sensor 24, an interrupt signal is transmitted and the receiver 10 immediately responds to a fire without waiting for a terminal call by addressing. Let the process take place. As for the transmission of the interrupt signal, for example, a break signal that destroys the terminal transmission data at the response timing and makes all 1s, for example, is transmitted, and the receiver 10 recognizes the interrupt notification by receiving this break signal.

As with the sensor repeater 14, the control repeater 20 is also provided with a primary line monitoring section 4, a secondary line monitoring section 5, a judging section 6, a terminal response section 7 and a prohibiting section 8. In this case, the determination unit 6 determines the primary line fault from the detection voltage of the primary line monitoring unit 4 and the secondary line fault from the detection voltage of the secondary line voltage detection unit 5, and does not make a fire determination. .

In the embodiment, the control unit 32 of the receiver 10 sets a series of terminal addresses for each terminal. For example, 127 addresses 127 to 127 are used. FIG. 3 is a time chart showing a calling operation by normal polling performed between the receiver 10 and the terminal side of FIG. In FIG. 3, the receiver 10 sequentially transmits a calling signal including a calling command C1 and a terminal address Ai (where i = 1 to 127). This calling signal is shown in FIG.
As shown in FIG. 1, it is composed of an 8-bit command field, an 8-bit address field, and an 8-bit checksum field, which are 3 bytes.

FIG. 5 shows the transmission format of the response signal from the terminal, which has an 8-bit data field and an 8-bit data field.
It is composed of 2 bytes of a checksum field of bits, and a start bit, a parity bit and a stop bit are provided before and after each byte. Of course, the transmission format of the calling signal from the receiver and the response signal from the terminal used in the present invention can be appropriately configured as needed.

FIG. 6 is a circuit block diagram showing an embodiment of the sensor repeater 14 shown in FIG. In FIG.
The repeater 14 is provided with a control circuit 42 including a CPU 44, a memory 46, and an AD converter 48. CPU44
A transmission / reception circuit 50 having a transmission indicator lamp 52 and an address setting circuit 54 having an address setting switch 56 are provided.

The CPU 44 includes the judgment unit 6 shown in FIG.
Each function of the terminal response unit 7 and the prohibition unit 8 is realized. AD
The conversion unit 48 has input ports 1 to n, and the ON / OFF sensors 24-1 to 24- (n-1) and the transmitter 26 are connected to each port. Fire / disconnection detection circuits 64-1 to 64-n and test circuits 66-1 to 66-n are individually provided for these detectors. The disaster wire detection circuits 64-1 to 64-n correspond to the secondary line monitoring unit 5 in FIG.

The fire / disconnection detection circuit 64-1 receives DC 20V from the constant voltage circuit 60 in a steady state, and the CPU 44
When the sampling command from the receiver 10 is received, the booster circuit 62 is operated to raise the boosted voltage DC 35V.
Receive. The on-off sensor is, for example, the on-off sensor 24.
As shown by -1, a warning indicator lamp 68, resistors R1 and R2, and a sensor contact 70 are provided.

Further, the terminator 72 is connected to the zener diode ZD2, the terminating resistor R0 and the zener diode ZD3.
Are connected in series. Zener diodes ZD2 and ZD3
Either is effective depending on the connection polarity. The Zener diode ZD2 is non-conductive in the supply state of DC20V, and becomes conductive when receiving the boosted voltage DC35V from the booster circuit 62, and produces a disconnection monitoring voltage dependent on the Zener diode ZD2.

FIG. 7 is a circuit diagram showing an equivalent circuit of the fire / disconnection detection circuit together with an on / off sensor. In FIG. 7, the fire / disconnection detection circuit 64 causes the constant current source 82 to supply a constant current to the on / off sensor 24 while the boosted voltage DC35V of the booster circuit 62 operated by the sampling command from the receiver is supplied. The internal impedance of the on-off sensor 24 is shown as R12 and the line resistance is shown as Rz.

If there is no disconnection and the sensor contact 70 is open, the Zener diode ZD2 becomes conductive, and a line-to-line voltage determined by the Zener diode ZD2, for example, within the normal detection region shown in FIG. 8, is obtained. The divided voltage of the resistors R5 and R6 is output to the AD converter 48. Further, when the detector contact 70 is closed by the fire detection, the line voltage depends on the detector impedance R12, and becomes a voltage within the range of the fire detection area shown in FIG. 8, for example.

Here, the on-off sensor 24 has an internal impedance R1 of, for example, a detection voltage V1.
I have decided 2. On the other hand, the internal impedance of the transmitter 26 is determined so that the detection voltage V2 is higher. Therefore, it is possible to distinguish between the fire detection by the on / off sensor and the fire detection by the transmitter by the detection voltage in the fire detection area. Further, since the boosted voltage DC35V is obtained as it is at the time of disconnection, the disconnection detection region having the upper limit of 35V shown in FIG. 8 is set.

Referring again to FIG. 6, the transmitter 26 provided corresponding to the port n of the AD converter 48 has the switch contact 7
In addition to 6, a switch contact 78 for confirmation display is provided, and a circuit of a confirmation indicator lamp 74 and resistors R3 and R4 is connected to the switch contact 78. This confirmation indicator light 74
A confirmation signal line is connected to the side from the receiver 10 side via the terminal AA of the sensor repeater 14. Terminal AA
When the receiver 10 receives a fire detection signal from the transmitter 26, a signal voltage is applied as a confirmation response signal, whereby the confirmation indicator lamp 74 is turned on. Also,
The terminator 72 is connected in parallel with the switch contact 76.

The signal line S from the receiver 10 is a constant voltage circuit 5
8, the constant voltage circuit 58 supplies DC 3.2V to the control circuit unit 42. Further, the power supply line BB from the receiver 10 is connected to the constant voltage circuit 60, and the constant voltage circuit 60 turns on / off the sensors 24-1 to 24-(n-
1) and the transmitter 26 are supplied with power. Further, the common line from the receiver 10 is connected to the terminal SC. still,
Diodes D1 and D2 and a Zener diode ZD for noise absorption for the power supply line BB, the signal line S, and the common line SC.
1, ZD2 are provided.

The test circuits 66-1 to 66-n provided in the sensor repeater 14 operate simultaneously when the CPU 44 receives a test command from the receiver 10, and the sensor of FIG. Or the test voltage V corresponding to the transmitter
Connect the test resistors so that 1 and V2 are obtained. The test operation of the test circuits 66-1 to 66-n is performed with the boost operation of the boost circuit 62 as in the case of the sampling command.

The operating states of the test circuits 66-1 to 66-n are continued until the test end command is received, during which the AD conversion unit 48 performs AD conversion of the detected voltage based on the sampling command to obtain The obtained test data is stored in the memory 46. Further, the sensor repeater 14 is provided with a control voltage monitoring circuit 80 that monitors the boosted voltage of the booster circuit 62 based on the supply voltage of the power supply line BB from the receiver 10. The control voltage monitoring circuit 80 corresponds to the primary line monitoring unit 4 in FIG. The monitoring voltage of the control voltage monitoring circuit 80 is taken in by the CPU 44 based on the sampling command from the receiver 10, and when the abnormality of the boosting voltage of the boosting circuit 62 is judged, the CPU 44 makes the primary data in the response data in the memory 46. Set the fault bit.

The CPU 44 judges whether or not the boosted voltage is abnormal, and detects AD from the ports 1 to n of the on / off sensor 24 and the transmitter 26.
It is forbidden to make a fire decision based on the converted data or a fault on the secondary line such as disconnection or short circuit. Further, the first call after the detection of the primary failure is notified to the receiver of the failure occurrence as no response. For failure notification due to no response from the terminal, the receiver 10 sends a primary failure inquiry command and a secondary failure inquiry command by polling for addressing. The terminal information in which the primary failure bit of the memory 46 is set is sent back.

When any of the AD conversion data of the fire disconnection circuits 64-1 to 64-n or the disconnection or short circuit of the sensor line is detected from the CPU 44, the CPU 44 causes the secondary failure in the response data in the memory 46. Set the bit. in this case,
Fire decisions are never prohibited. Further, the receiver is notified of the occurrence of a failure as a non-response to the first call after the detection of the secondary failure, and in response to this, the receiver 10 issues a primary failure inquiry command and a secondary failure inquiry command by polling by addressing. Since it is sent, the terminal information in which the secondary failure bit of the memory 46 is set is sent back as response information to the secondary failure inquiry command.

FIG. 9 is a block diagram of an embodiment showing an embodiment of the control repeater 20 of FIG. 2, and shows an example in which a district bell is connected as a control load. In FIG. 9, the power supply line BB, the power supply common line BBC, the signal line S, and the signal common line SC are connected to the control repeater 20, which are shown as connection terminals. The constant voltage circuit 140 and the transmission / reception circuit 14 are used as a circuit section that receives power supply from the signal line SC.
2. A control circuit 146 and an address setting circuit 148 are provided.

On the other hand, a relay drive circuit 156 and a power supply line monitoring circuit 1 are provided as a circuit portion which receives power supply from the power supply line BB.
58, a control line monitoring circuit 160, a negative voltage circuit 162, and a constant voltage circuit 164. The district bell 100 is connected to the terminals B and BC of the control repeater 20 by a control line 28. This area bell 100 is connected in series with a diode D12 having the terminal B side as an anode.
A resistor 102 for detecting disconnection is connected in parallel with the series circuit of the diode D12.

The control circuit 146, which receives power supply from the signal line S, has a built-in CPU and memory, as in the sensor control circuit 42 shown in FIG. 6, and is connected to the drive side by the power line BB as shown in the figure. One of the light emitting diodes of the photocouplers PC1 to PC6 and the phototransistor is provided for exchanging electrically separated signals.
That is, the photocouplers PC1 to PC3 are provided with the light emitting diodes PD1 to PD3, and the photocouplers PC4 to P4
Phototransistors PT4 to PT6 are provided for C6.

The address setting circuit 148 uses the address setting switch 150 to set its own terminal address to the control circuit 1.
Set to 46. The transmission / reception circuit 142 receives the signal sent from the receiver in the voltage mode from the signal line S and outputs it to the control circuit 146. Further, the transmission signal from the control circuit 146 to the receiver is sent to the signal line S in the current mode.

The transmission / reception circuit 142 is provided with a transmission indicator lamp 144 which blinks at bits 1 and 0 of transmission / reception data. The constant voltage circuit 140 includes a transmission / reception circuit 142 and a control circuit 1.
46, a constant voltage of DC 3.2V is supplied to the address setting circuit 148. Further, on the input side of the constant voltage circuit 140, a diode D10 and a zener diode Z for noise removal are provided.
D10 is provided.

The CPU provided in the control circuit 146 is shown in FIG.
Similar to the sensor repeater 14 described above, the functions of the judgment unit 6, the terminal response unit 7, and the prohibition unit 8 are realized by program control. The primary line monitoring unit 4 shown in the sensor repeater 14 in FIG. 2 is a power line monitoring circuit 15 provided on the power line BB side.
8 and the secondary line monitoring unit 5 is the control line monitoring circuit 1
Corresponds to 60.

Next, the drive circuit section of the district bell 100 will be described. The latching relay 145 is included in the relay drive circuit 156.
Is provided. The latching relay 145 has a relay contact 154 for switching the control line 28 on the terminal B side for the area bell 100 to the power line 114 from the power line BB and the signal line 115 from the control line monitoring circuit 160. The latching relay 145 is driven by turning on the photocoupler PC2 when the control circuit 146 receives a control command for controlling the area bell 100 from the receiver 10, and the relay contact 15
4 is switched from the illustrated side a to the side b, and the district bell 100 is supplied with power from the power line BB and sounds.

The reset coil R is driven by turning on the photocoupler PC3 when the control circuit 146 receives a recovery control command for instructing the recovery of the area bell from the receiver 10, and the relay contact 154 from the b side to the a side. Switch to. The power supply line monitoring circuit 158 sends a sampling command from the receiver 10 for instructing terminal simultaneous AD conversion to the control circuit 1.
It is driven by turning on the photocoupler PC1 when it is received at 46, and while the relay contact 154 is switched to the side a in the figure, the capacitor charge of the negative voltage circuit 162 is applied to the area bell 100 so that the terminal BC side becomes +. In addition to the opposite polarity,
By applying the voltage of the opposite polarity, the resistor 102 for disconnection detection
Current to the control line monitoring circuit 1
The monitoring is performed at 60 to detect a disconnection or a short circuit.

When the power line monitoring circuit 158 normally applies a voltage of the opposite polarity from the negative voltage circuit 162 to the area bell 100, the light emitting diode PD6 of the photocoupler PC6 is turned on and the photocoupler of the control circuit 146 is turned on. PC
When the phototransistor PT6 of No. 6 is turned on, the test voltage of the voltage circuit 162 is normal, that is, the power supply line BB.
If the normal power supply voltage is supplied to the negative voltage circuit 162,
Signals that the secondary line voltage is normal.

Therefore, even if the control circuit 146 tests-drives the power line monitoring circuit 158 by the photocoupler PC1,
If the normal voltage of the negative voltage circuit 162 cannot be obtained by the photocoupler PC6, it is determined that the power supply line BB is abnormal. 1
The next fault bit will be set. The control line monitoring circuit 160 uses the power line monitoring circuit 158 for the district bell 100.
A short circuit and a disconnection are detected by the presence or absence of a current flowing with a voltage of opposite polarity from the negative voltage circuit 162. District bell 100
When the control line of the photocoupler PC4 is short-circuited, the light emitting diode PD4 of the photocoupler PC4 emits light, and the control circuit 146 causes the photocoupler P4.
The short circuit of the control line 28 can be recognized by turning on the phototransistor PT4 of C4.

When the control line 28 is broken, the light emitting diode PD5 of the photocoupler PC5 emits light, and the control circuit 1
46 photo coupler PC5 photo transistor PT5
By turning on, the disconnection of the control line 28 can be recognized. still,
A diode D11 is provided on a branch line for supplying power to the negative voltage circuit 162. FIG. 10 is a circuit diagram showing details of a circuit portion for detecting disconnection and short circuit of the district bell 100 of FIG. In FIG. 10, the negative voltage circuit 16
2 is provided with a capacitor C1, which is connected to the power supply line from the diode D11 via the resistor R1 and is connected to the common side via the diode D14. Further, the Zener diode ZD11 is connected in parallel with the series circuit of the capacitor C1 and the diode D14 so that the charging voltage of the capacitor C1 does not exceed the necessary voltage.

The positive side of the capacitor C1 in the charged state is connected to the common side via the transistor Tr1 provided in the power line monitoring circuit 158. The phototransistor PT1 of the photocoupler PC1 is provided at the base of the transistor Tr1.
9 is connected to a series circuit of resistors R2 and R3, and when the control circuit 146 shown in FIG. 9 receives the sampling command from the receiver 10 and the light emitting diode PD1 emits light, the phototransistor PT1 turns on and the transistor Tr1 turns on. If the BC side is positive between the terminals B and BC of the district bell 100, a test voltage of reverse polarity is applied.

A diode D13 is connected in series on the negative side of the capacitor C1 in the charged state.
The light emitting diode PD6 of the photocoupler PC6 is connected to the anode side and the common side of 3 through the resistor R4. Therefore, the transistor Tr1 is turned on and the capacitor C1 is turned on for the continuity test of the control line 25 reaching the district bell 100.
When the charging voltage of is applied to district bell 100 with reverse polarity,
If the charging voltage of the capacitor C1 is normal, current also flows through the photodiode PD6 to drive light emission, and the control circuit 1
A signal indicating that the charging voltage of the capacitor C1 of the negative voltage circuit 162 is normal, that is, a primary line voltage normal signal indicating that the supply voltage of the power supply line BB is normal is output to the 46 side.

The control line monitoring circuit 160 has a diode D1.
5 is followed by light emitting diode PD5 of photo coupler PC5
A parallel circuit of a resistor R5 and a capacitor C2 is provided. Subsequently, a transistor Tr2, which receives a bias from a resistor R7 for current detection via a resistor R6, is provided, and further, a transistor Tr3 in which the collector of the transistor Tr2 is connected to the base is provided.

A resistor R is provided at the collector of the transistor Tr3.
The light emitting diode PD4 of the photocoupler PC4 for detecting a short circuit is connected via 10. Resistance R9 is district bell 10
The transistor Tr3 is biased during a continuity test in which a voltage of reverse polarity is applied to 0. The operation of the control line monitoring circuit 160 is as follows. First, when the control line 28 is normal, the capacitor C1 is turned on by turning on the transistor Tr1.
When a voltage of reverse polarity due to is applied, a specified current determined by the resistor 102 for detecting disconnection flows, and the photocoupler PC5
Since the current flowing through the light emitting diode PD5 is small due to the shunt of the parallel resistor R5, it does not emit light.

Further, since the transistor Tr2 is turned on by being biased by the voltage due to the current flowing through the resistor R7 and the base of the transistor Tr3 is pulled in to cut off, the light emitting diode PD4 of the photocoupler PC4 for detecting disconnection does not emit light. Next, when the control line 28 is short-circuited, an excessive current flows due to the short-circuit, so that the light emitting diode PD5 of the photocoupler PC5 emits light and the control circuit 14
Notify 6 of the short circuit.

Further, if the control line 28 is broken, the resistance R7
Since no current flows through the transistor Tr2, the transistor Tr2 is turned off, the transistor Tr3 is turned on by being biased by the resistor R9, and the light emitting diode PD4 of the photocoupler PC4 is driven to emit light to disconnect the control line 28 to the control circuit 146 side. Inform. Negative voltage circuit 162 and control line monitoring circuit 1
The constant voltage circuit 164 provided between the transistors 60 includes a transistor Tr4, a resistor R8, a Zener diode ZD2 and a capacitor C3.
00, a constant voltage determined by the Zener diode ZD12 is applied to the control line monitoring circuit 160 during a continuity test by applying a reverse polarity voltage to 00.

Further, a relay contact 180 of the latching relay 145 is provided on the line connecting the base of the transistor Tr4 provided in the constant voltage circuit 164 to the common side. This relay contact 180 is opened as shown by the energization of the reset coil R of the latching relay 145, and when the set coil S of the latching relay 145 is driven, the relay contact 180 is closed and the Zener diode ZD12 is short-circuited, and the constant voltage function is achieved. The voltage is stopped and the voltage applied to the control line monitoring circuit 160 is lowered to the inoperable region.

Constant voltage circuit 1 with this relay contact 180
The function stop of 64 is to switch the relay contact 154 to the b side by driving the set coil S of the latching relay 145,
The malfunction of the control line monitoring circuit 160 when ringing the district bell 100 is prevented. That is, when the set contact S of the latching relay 145 is driven to switch the relay contact 154 to the b side and ring the district bell 100, the control line monitoring circuit 160
In that case, it will be in the same state as when the wire was broken. Therefore, even if the transistor Tr1 is turned on based on the sampling command sent from the receiver while the district bell 100 is driven and the test operation of applying the charging voltage of the capacitor C1 with the reverse polarity is performed, the relay contact 180 is closed at this time. Because
The voltage necessary for the operation of the control line monitoring circuit 160 is not generated, the transistor Tr3 is prohibited from being turned on, and the disconnection detection by the light emitting diode PD4 of the photocoupler PC is blocked.

FIG. 11 is a flow chart showing the processing operation of the receiver 10 shown in FIG. In FIG. 11, when the power of the receiver 10 is turned on, first, a predetermined initialization is performed in step S1, and the terminal address n for polling is set to the first n = 1 in step S2. Subsequently, in step S3, it is checked whether or not a faulty address indicating a faulty terminal is set. Since there is no faulty address at first, the process proceeds to step S4, and polling is performed by a call command specifying the terminal address n = 1. I do.

Following the terminal polling, it is checked in step S5 whether or not a response signal is received from the terminal. When the response signal is received, in step S6, the state change of the data field is checked. S
At 7, the process corresponding to the state change is performed. The process corresponding to the state change in step S7 differs depending on the type of terminal. For example, the sensor repeater 14 recognizes a break signal transmitted as an interrupt notification associated with a fire detection from the data field and performs the fire interrupt process.

Further, in the case of the control repeater 20, information indicating the operating state of the control load is captured and a confirmation display or the like is performed. Further, the analog smoke sensor 16 and the analog heat sensor 18 process the analog data given in the data field. Subsequently, in step S8, it is checked whether or not the sampling period is a fixed sampling period defined as, for example, 1 second. If the sampling period is reached, a sampling command instructing simultaneous AD conversion on the terminal side is transmitted in step S9.

In step S10, it is checked whether or not it is the final terminal address. If it is not the final terminal address, the terminal address n is also incremented by 1, and the processing from step S3 is repeated. If it is the final terminal address, step S
Returning to step 2, the process from the first terminal address n1 is repeated. On the other hand, in the signal reception in step S5, if there is no response signal from the terminal and there is no response, this terminal has a failure, so the process proceeds to step S12 and is set as a failure occurrence address. Step S1
When the failure occurrence address is set in step 2, when the failure occurrence address is next polled, it is determined to be the failure address in step S3, and the process proceeds to the failure handling processing in step S13.

FIG. 12 is a flow chart showing the details of the failure handling processing of FIG. 11 as a subroutine. 12
In the failure handling processing of No. 2, there are two types of terminal failures: a primary failure due to an abnormality in the power supply line from the receiver 10 and a secondary failure in the sensor line or control line connecting the detector or control load. Therefore, the inquiry command is issued separately for the primary failure and the secondary failure.

That is, the primary failure inquiry command is transmitted in step S1. In step S2, the signal from the terminal is received. In step S3, if the primary failure bit of the data field is set, it is determined to be the primary failure, and step S4
The warning of the occurrence of the primary failure is displayed together with the terminal address, and the process proceeds to step S5. On the other hand, if the failure of the terminal is the secondary failure, the primary failure bit cannot be obtained in the response to the primary failure inquiry command in step S1, so the process proceeds from step S3 to S5 and the secondary failure inquiry command is sent. To send.

When the response signal from the terminal to the secondary failure inquiry command is received in step S6, step S7
The presence / absence of a secondary fault bit is detected by, and if there is a secondary fault bit, a warning indicating that a secondary fault has occurred is displayed together with the terminal address in step S8. When the secondary failure processing is completed, the failure occurrence address is reset in step S9, and then the process returns to the main routine of FIG. If the secondary failure bit is not obtained in step S7, it is determined that the secondary failure has been recovered, and the failure occurrence address is reset in step S9 to return to the main routine.

FIG. 13 is a flow chart showing the processing operation of the sensor repeater shown in FIG. In FIG. 13, when power is supplied to the sensor repeater 14, a predetermined initialization is performed in step S1 and then, in step S2, it is checked whether or not a signal is received from the receiver 10. When the signal from the receiver 10 is received, it is checked in step S3 whether it is a sampling command.

If it is not a sampling command, it is checked in step S4 whether there is a match with its own address. If an address match is obtained, it is determined in step S5 whether it is a call command or a control command. Here, the control command for the sensor repeater includes a sensor test command and a test recovery command. If it is a call command or a control command, the process proceeds to step S6, and for the call command, the terminal information held in the memory at that time is returned as response information. At this time, if there is a primary failure bit and a secondary failure bit, no response processing is performed for the calling command.

On the other hand, if it is a control command, processing such as a sensor test according to the control command is executed. Then, in step S7, the presence or absence of the primary failure inquiry command is checked,
If it is a primary failure inquiry command, a primary failure occurrence response is made in step S8. In step S9, it is checked whether the command is a secondary failure inquiry command. If the command is a secondary failure inquiry command, a secondary failure occurrence response is given in step S10.

On the other hand, when the sampling command from the receiver 10 is discriminated in step S3, the process proceeds to step S11 to set a unique waiting time Tw set for each terminal or each terminal group, and in step S12 the waiting time Tw is set.
And waits for the progress of step S13 to proceed to step S13. By setting the waiting time Tw, it is possible to limit the number of terminals that simultaneously perform the sampling operation and reduce the power supply capacity of the receiver.

In step S13, the ports 1 to n of the AD converter 48 are sequentially sampled, and the secondary side line voltage corresponding to the state of the on / off sensor or the oscillator is taken in by the AD change. Then, in step S4, the control voltage boosted by the booster circuit 62 based on the power supply line BB from the receiver 10 is fetched. Then, in step S15, it is checked whether the control voltage boosted by the booster circuit is normal.

If the power supply from the receiver 10 by the power supply line BB is normally performed, the control voltage boosted by the booster circuit 62 is normal, the process proceeds to step S17, and the on / off sensor sampled in step S13 is detected. Also, the secondary side line voltage of the transmitter is compared with the detection area shown in FIG. 8 to determine whether or not the wire is broken. If the wire is broken, step S1
At 8, the secondary fault bit is set.

In step S19, it is determined whether or not there is a fire, and if it is a fire, an interrupt transmission process is performed in step S20. In this interrupt transmission process, a break signal is sent to destroy the response signal so that the response signal becomes, for example, all zero at the response timing of the call signal from the receiver 10 to an arbitrary terminal. On the other hand, in step S15, if the supply voltage from the power supply line BB from the receiver 10 decreases due to a short circuit, a decrease in impedance, etc. and is lower than the boosted normal control voltage, it is determined as a primary line fault, and step S15 S1
At 6, the primary failure bit is set. In this case, the determination of fire, disconnection, etc. based on the secondary side line voltage in steps S17 to S20 is not performed at all.

Therefore, if the primary failure bit is set in step S16 when the secondary failure has not occurred, even if the secondary failure inquiry command from the receiver 10 is received, only a normal signal is sent. No judgment of fire or disconnection, etc. 1
This prevents accidental fire decisions etc. on the detector due to obstacles in the next track. If the primary failure bit is set in step S16 or the secondary failure bit is set in step S18, no response is transmitted to the receiver 10 and no response is made. In response to no response to the receiver due to the set of the primary fault bits or the set of the secondary fault bits, the receiver sends a primary fault inquiry command and a secondary fault inquiry command in order. If it is the primary fault, in response to the primary fault inquiry command in step S7, a response signal in which the primary fault bit of the data field is set in step S8 is transmitted to the receiver as a primary fault occurrence response. . If it is the secondary failure, the secondary failure inquiry command is determined in step S9, and the response signal in which the secondary failure bit of the data field is set is transmitted to the receiver 10 as the secondary failure occurrence response in step S10. To do.

FIG. 14 is a flow chart showing the processing operation of the control repeater shown in FIG. 9. In the processing of the sensor repeater shown in FIG. 13, a fire judgment is made from the secondary side line voltage. Except for this, the process is almost the same. That is, FIG.
In this case, if the sampling command is determined in step S3, after the waiting time Tw peculiar to the terminal in steps S11 and S12 elapses, in step S13, the district bell 10
A test operation of applying the charging voltage of the charged capacitor to the negative voltage circuit 162 with a reverse polarity is performed at 0, and the disconnection / short-circuit information is fetched by the control line monitoring circuit 160.

Further, in step S14, the control line monitoring circuit 15
The control voltage by the test operation of 8, that is, the reverse polarity applied voltage of the capacitor charging voltage to the area bell 100 is taken in as the control voltage. Subsequently, in step S15, it is checked whether or not the control voltage as the capacitor charging voltage applied to the district bell in the opposite polarity is normal. If it is normal, in step S17 it is checked whether or not there is a disconnection or short circuit. The secondary failure bit is set in step S18.

When the control voltage is low in step S15, the power supply line BB has an abnormality such as a short circuit, disconnection, or voltage fluctuation, and the capacitor of the voltage circuit 162 cannot be normally charged. To set the primary failure bit. When the primary failure bit is set in step S16 or the secondary failure bit is set in step S18, no response is given to the subsequent calling command by the designation of the first terminal address. A primary failure inquiry command is sent from the receiver.

At this time, if it is the primary fault bit, the primary fault inquiry command is discriminated in step S7 and step S8.
Proceed to step 1 to transmit the primary failure occurrence response in which the primary failure bit is set to the receiver 10. When the secondary failure bit is set, when the secondary failure inquiry command is determined in step S9, the process proceeds to step S10, and a secondary failure occurrence response for transmitting a response signal in which the secondary failure bit is set is performed.

In the above embodiment, the case where the district bell is connected as the control repeater 20 is taken as an example.
As long as power is supplied to the control load by the dedicated power line BB from the receiver 10, it is not limited to the district bell,
It can be directly applied to an appropriate control load.
In the above embodiment, the receiver 10 is provided as the receiving means 1 in the principle diagram of FIG. 1, but the receiving means 1 is a local receiver on the receiver and the transmission path from the receiver. A configuration in which a functioning relay board is connected and a terminal is connected to the transmission path from the relay board, or only a plurality of relay boards as local receivers are connected to the transmission path, and the terminal is connected to the transmission path from each relay board. Including the configuration.

[0077]

As described above, according to the present invention, a dedicated power line other than the signal line is drawn from the receiver to connect the terminal, and the power line from the receiver is used for the detector or the control load of the terminal. When power is supplied to the receiver, when a primary line fault due to short-circuit, disconnection, voltage fluctuation, etc. of the power line from the receiver is detected, a fire judgment or 2
By prohibiting the next failure judgment at all, the result of the failure of the power supply line from the receiver to the detector connected to the terminal is incorrect fire judgment and the result of the judgment of the wrong line failure due to the control load is a normal signal. It is possible to prevent the malfunction that is transmitted to the receiver by the line, and it is possible to greatly improve the reliability of disaster prevention monitoring.

[Brief description of drawings]

FIG. 1 is an explanatory view of the principle of the present invention.

FIG. 2 is an explanatory diagram showing the overall configuration of the present invention.

FIG. 3 is a time chart showing the polling of the present invention.

FIG. 4 is an explanatory diagram of a transmission format of a calling signal from a receiver.

FIG. 5 is an explanatory diagram of a transmission format of a response signal from the terminal.

FIG. 6 is a configuration diagram of an embodiment of the sensor repeater of FIG.

7 is a circuit diagram showing an equivalent circuit during the fire detection operation of FIG.

FIG. 8 is an explanatory diagram showing detection areas for fire, normality, and disconnection in FIG.

FIG. 9 is a block diagram of an embodiment of the control repeater of FIG.

FIG. 10 is a circuit diagram of the area bell test circuit unit in FIG.

11 is a flowchart showing the processing operation on the receiver side in FIG.

FIG. 12 is a flowchart showing a subroutine of the failure handling processing of FIG.

13 is a flowchart showing the processing operation of the sensor repeater of FIG.

14 is a flowchart showing a processing operation of the control repeater of FIG.

[Explanation of symbols]

 1: Receiving means 2: Terminal 3: Detector 4: Primary line monitoring unit 5: Secondary line monitoring unit 6: Judgment unit 7: Terminal response unit 8: Prohibition unit 9, 30: Control load 10: Receiver 12: Transmission line 14: Repeater for detector 16: Analog smoke detector 18: Analog heat detector 20: Repeater for control 22: Sensor line 24-1, 24-2: On / off sensor 26: Transmitter 28: Control line 32: control unit 34: display unit 36: operation unit 38: ringing unit 42, 146: control circuit 44: CPU 46: memory 100: district bell 102: disconnection detection resistor 145: latching relay 154, 180: relay contact 156: Relay drive circuit 158: Power supply line monitoring circuit 160: Control line monitoring circuit 162: Negative voltage circuit 164: Constant voltage circuit BB: Power supply line S: Signal line SC, BBC: Common line

Claims (5)

[Claims] 1. A one or a plurality of terminals are connected to a transmission line having at least a power supply line, a signal line and a common line drawn out from a receiving means, the terminal connecting a detector to the signal line, and receiving an address from the receiving means. In a disaster prevention monitoring device that specifies and collects detection information of a specific terminal, the terminal includes a primary line monitoring unit that detects a primary line voltage of a power supply line from a receiving unit and a signal line on a detector side. A primary line fault is judged from the detected voltages of the secondary line monitoring unit that detects the secondary line voltage and the primary line monitoring unit, and a warning or a secondary line fault is detected from the detected voltage of the secondary line voltage detection unit. A judgment unit for judging and a terminal response unit for replying the judgment result of the judgment unit to the call from the receiving unit and the judgment unit.
A disaster prevention monitoring device, comprising: a prohibition unit for prohibiting the determination of a fire or a line fault based on the secondary line voltage when the next line fault is judged. 2. One or a plurality of terminals are connected to a transmission line including at least a power supply line, a signal line and a common line drawn out from a receiving means, and the terminal connects a control load to the signal line.
In a disaster prevention monitoring device for driving a control load of a specific terminal by designating an address from the receiving means, a primary line monitoring unit for detecting the primary line voltage of a power supply line from the receiving means in the terminal; A secondary line monitoring unit that detects the secondary line voltage of the signal line on the device side, and a primary line fault is determined from the detection voltage of the primary line monitoring unit, and 2 from the detection voltage of the secondary line voltage detection unit. A determination unit for determining a next line fault, a terminal response unit for responding to the call from the receiving means with the determination result of the determination unit, and a secondary line voltage when the determination unit determines a primary line fault. A disaster prevention monitoring device comprising: a prohibition unit for prohibiting determination of a railroad fault based on the above. 3. The disaster prevention monitoring device according to claim 1 or 2, wherein the determination unit is configured to detect the primary line voltage and the secondary line voltage based on a sampling command signal transmitted from the receiving unit at regular intervals. Hold the result of judgment in memory,
A disaster prevention monitoring device, wherein when the self-address matches the calling address from the receiving means, the judgment result stored in the memory is transmitted as a response. 4. The disaster prevention monitoring device according to claim 1, wherein the terminal response unit does not respond to a call command signal from the receiving unit when the determination unit determines a primary line failure. In response to the failure inquiry command signal from the receiving means after the non-response, the receiving means responds to the occurrence of the primary line failure, and when the receiving means does not respond when the terminal call command signal is transmitted, the failure inquiry is made. A disaster prevention monitoring device characterized by transmitting a command signal. 5. The disaster prevention monitoring device according to claim 1, wherein the receiving means is a receiver only, or one or more as a local receiver connected to the receiver and a transmission path from the receiver. The disaster prevention monitoring device is characterized in that it is configured only by the relay board or the relay board as a plurality of local receivers connected to each other by a transmission path.