JP2854491B2 - Disaster prevention monitoring device and method - 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 for collecting and controlling information on a terminal by a call from a receiving side. The present invention relates to a disaster prevention monitoring device that reports occurrence.

[0002]

2. Description of the Related Art Conventionally, as this kind of disaster prevention monitoring device,
Japanese Patent Application No. 3-214882 is known. In this disaster prevention monitoring device, regular collection of terminal information
A polling method is employed in which a paging signal in which a terminal address is designated is sequentially transmitted from the receiver side, and terminal information is transmitted as a response signal to the paging signal. However, when an abnormality such as a fire occurs, there is a time delay until the abnormality is detected in the polling, so that the occurrence of the abnormality is notified by an interrupt.

That is, a terminal that detects a fire transmits a break signal that destroys the terminal response signal at the transmission timing of the terminal response signal to the call, regardless of the call address. For example, the terminal response signal is destroyed so that the line current is increased to the all-one logic level. Upon receiving the all-one terminal response signal and judging the interruption, the receiver starts a group search for identifying the abnormal occurrence terminal that caused the interruption, and identifies the abnormality occurrence group and identifies the abnormality occurrence terminal in the group. Then, the process proceeds to an in-group search process for identifying a terminal, and detects an abnormal terminal and displays an alarm.

[0004]

However, in such a conventional disaster prevention monitoring device, a relay driving circuit of a control terminal for controlling a disaster prevention device such as a district bell, a fire door and the like is provided with a transmission line from a receiver. When the relay drive circuit is operated, the current consumption of the transmission line increases, and the same state as when the interrupt signal is transmitted by the break signal occurs,
There is a problem that the receiver determines that an interrupt has occurred and enters an interrupt process.

[0005] Further, since the interrupt signal from the terminal is transmitted at the response timing of the call signal from the receiver, if other command signals, for example, a test command signal at the time of periodic inspection, are continuous, Even when a fire is detected, an interrupt signal cannot be transmitted, and there has been a problem that fire detection is delayed. The present invention has been made in view of such a conventional problem, and provides a disaster prevention monitoring device that can prevent an interrupt malfunction when a relay is driven and that can perform a fire interrupt process even when a command other than a call command continues. The purpose is to:

[0006]

FIG. 1 is a diagram illustrating the principle of the present invention. First, in the present invention, a disaster prevention monitoring device that connects a plurality of terminals 2 to a transmission path from the receiving means 1 and specifies terminal addresses from the receiving means 1 to collect or control terminal information is symmetric. According to the present invention, such a disaster prevention monitoring device transmits a calling signal to the receiving means 1 by sequentially specifying a terminal address when collecting terminal information, and a terminal address when controlling the terminal. Send control signal specifying
When transmitting the control signal continuously, a call control unit 3 for transmitting the call signal by inserting the call signal between the control signals, and an interrupt signal from the terminal 2 as a response timing of the call signal. And an interrupt processing unit 4 for executing an interrupt process by determining only at.

The terminal 2 has a call responding section 6 for transmitting terminal information in response to a call signal when the call address from the receiving means 1 and its own address are coincident with each other. An interrupt transmitting unit 7 that transmits an interrupt signal to notify the receiving unit of the occurrence of an abnormality using only the response timing of the calling signal from the receiving unit 1 and that the calling address from the receiving unit 1 matches the own address. In this case, a terminal control unit 8 for controlling the terminal 2 according to the control signal is provided.

[0008] Here, at the time of load control, the call control section 3 of the receiving means 1 inserts a call signal for the terminal 2 between a command signal instructing the operation of the terminal load as a control signal and transmits the signal. . Also, at the time of the operation test of the terminal, the call control unit of the receiving means inserts a call signal for the terminal 2 between the test command signal and the test command signal instructing the operation test of the terminal as a control signal, and transmits the signal.

When detecting an abnormality, the interrupt transmitting section 7 of the terminal 2 transmits a break signal for invalidating the terminal response signal at the transmission timing of the terminal response signal, and notifies the receiving means 1 of the occurrence of the abnormality by an interrupt. When receiving an interrupt signal from a terminal, the interrupt processing unit 4 of the receiving means 1 performs a search process for searching for and identifying a terminal that has detected an abnormality. Receiving means 1
Is only a receiver, one or more relay boards as a local receiver connected to a receiver and a transmission path from the receiver, or only a plurality of relay boards as a local receiver connected to each other via a transmission path. Of any one of the above.

Further, the present invention provides a disaster prevention monitoring method comprising the following steps: A step of inserting a call signal between the control signals and transmitting the control signals to the terminal side from the receiving means when transmitting the control signals continuously . A step of transmitting response information from the terminal to the receiving means in response to a calling signal when a match between the calling address from the receiving means and the own address is obtained;

The calling address from the receiving means and the self address
According to the control command signal when a match with the
The process of controlling the terminal.  When an error is detected on the terminalWhen collecting device informationReceiving
Of the response timing of the call signal other than the control signal from the
Interrupt signal to notify the receiving
The process of sending.  Response timing of the call signal from the interrupt signal from the terminal
A process of executing an interrupt process by judging only in.

[0012]

According to the disaster prevention monitoring device of the present invention, when a load operation or an operation test is performed from the receiver side, a call command used for collecting terminal information is inserted between control commands. Therefore, if a fire is detected during load driving or testing by continuous address designation, an interrupt signal indicating an abnormality is transmitted at the response timing of a call command inserted between control commands. .

Therefore, even if the load address is continuously specified and the terminal load is driven or the terminal operation test is performed, the interrupt transmission indicating the occurrence of the fire is performed without waiting for the termination of the terminal control. You can make a quick fire decision. Also, even if the current on the transmission line becomes the same as the time of transmission of the break signal indicating the interrupt signal by the relay drive, the receiver side determines the interrupt signal only at the response timing of the call signal. Even if the same state as the transmission of the break signal occurs, the receiver does not judge the interruption.

[0014]

FIG. 2 is a structural view showing an embodiment of the present invention. In FIG. 2, reference numeral 10 denotes a receiver, and a repeater 1 for a sensor is connected to a transmission line 12 drawn from the receiver 10.
4, the analog smoke sensor 16, the analog heat sensor 18, and the control repeater 20 are connected. Repeater for sensor 14
, A sensor line 22 is drawn out, and the on / off sensors 24-1, 24-2, 24-3,.
And a transmitter 26 for transmitting a fire signal by switch operation is connected. A control line 28 from the control repeater 20 is connected to a control load 30 such as a district bell, a smoke prevention device, and the like.

On the other hand, the receiver 10 is provided with a control unit 32 using a CPU.
Operation unit 36, sound unit 3 that outputs an alarm and a voice message
8 are provided. The control unit 32 of the receiver 10 is provided with a call control unit 3, an interrupt processing unit 4, and a periodic check unit 5, which are realized by program control of the CPU. Correspondingly, the terminal is provided with a call responding section 6, an interrupt transmitting section 7, and a terminal control section 8 for performing a terminal drive and a terminal test, as represented by the sensor repeater 14.

The call control unit 3 of the receiver 10 sets a series of terminal addresses for each terminal.
127 addresses of .about.127 are used. At the time of normal polling for collecting terminal information, the call control unit 3 of the receiver 10 sequentially calls the terminal at regular intervals using a call signal including a terminal address and a call command, and transmits the terminal information as a response. I have.

When controlling the terminal, the call control unit 3 transmits a control signal designating a terminal address and simultaneously inserts a polling call signal between the control signals and transmits the control signal. Here, as a control signal for the terminal, a control signal including a control command for driving the control load 30 of the control repeater 20 and a regular inspection instruction from the regular inspection unit 5 at regular time intervals are received. Vessel 1
4. Analog smoke detector 16 and analog heat sensor 18
There is a control signal for a terminal test which sends a test command by sequentially designating addresses of the terminal.

Note that the terminal test can be performed by artificially setting a terminal address. When a setting for performing a continuous test on a plurality of terminals is performed, the control signal and the control signal are set in the same manner as in the periodic inspection. A polling call signal is inserted and transmitted. A call signal or a control signal from the call control unit 3 of the receiver 10 is received by the call response unit 6 on the terminal side, and when a match between the call address included in the received signal and the terminal address of the own terminal is obtained, If it is a call command, the terminal information stored in the memory at that time is transmitted to the receiver 10 as a terminal response signal. In the case of a control command, a sensor test or a load drive is performed according to the command decoding result.

FIG. 3 is a time chart showing a calling operation by ordinary polling performed between the receiver 10 and the terminal side in FIG. In FIG. 3, the receiver 10 includes a calling command C1 and a terminal address Ai (where i = 1 to 12).
The paging signal including 7) is sequentially transmitted. As shown in FIG. 4, this call signal is composed of an 8-bit command field, an 8-bit address field, and a 3-byte 8-bit checksum field.

FIG. 5 shows a transmission format of a response signal from the terminal, which includes an 8-bit data field and an 8-bit data field.
It is composed of two bytes of a bit checksum field, 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 call signal from the receiver and the response signal from the terminal used in the present invention can have an appropriate configuration as needed.

Referring again to FIG. 2, in this embodiment, the call control section 3 of the receiver 10 sends a detection signal to all terminals regardless of the terminal addresses during the call in which the terminal addresses are specified. A sampling command (batch AD conversion command) is transmitted at a constant period of one second, for example, in order to instruct a batch information collection process for sampling by AD conversion and holding the same at the same time in the memory.

When the call responding section 6 on the terminal side determines the sampling command in the command field irrespective of the address, it collects the detection signals of the detector connected to the terminal by AD conversion and stores it in the memory. The terminal data collected at the same time based on such a sampling command is sent back to the receiver 10 as terminal response information to a call signal specifying a terminal address.
In addition, the terminal information is not limited to the collective collection of the terminal information by the sampling command, and the terminal information may be returned in real time when the call signal is received.

The interrupt transmission unit 7 provided on the terminal side
For example, when a fire is detected from detection data obtained by performing sampling by AD conversion of a detection signal based on a sampling command from the calling control unit 3 of 0, the occurrence of fire is notified to the receiver 10 using the terminal response timing. Send an interrupt signal. Here, the calling signal from the receiver 10 to the terminal is sent in the voltage mode, while the response signal from the terminal to the receiver 10 is sent in the current mode. Therefore, the interrupt transmitting unit 7 transmits the interrupt signal by transmitting a break signal that destroys the response signal transmitted from any of the terminals at the timing of the terminal response signal to the transmission line 12 as a current signal.

An interrupt processing section 4 is provided in the control section 32 of the receiver 10 in correspondence with the interrupt transmission section 7 on the terminal side. The interrupt processing unit 4 uses only the timing of the terminal response signal, and generates a unique signal that cannot be obtained by a normal terminal response signal, for example, all 1s.
Is determined to have received the interrupt signal from the terminal. When the interrupt processing unit 4 determines that the interrupt signal has been received from the terminal, it causes the call control unit 3 to transmit an interrupt confirmation request command to obtain details of the interrupt cause.

In response to the interrupt confirmation request command, the call response section 6 on the terminal side returns the detailed interrupt information. The interrupt processing unit 4, which has obtained the detailed interrupt information using the call control unit 3,
A group search for specifying the terminal that has transmitted the interrupt signal is started. This group search divides the terminal address into a predetermined number of groups, issues a search command for each group, specifies the group including the terminal where the fire detection was performed,
If the group can be specified, the terminals in the group are sequentially called to specify the terminal that caused the fire. This group search may be performed by a dichotomy or the like.

FIG. 6 shows an interrupt transmitting unit 7 and a receiver 10 on the terminal side.
5 is a time chart showing a transmission operation between the interrupt processing units 4 of FIG. Now, assuming that a fire is detected at the terminal at the address Ai, the interrupt transmission unit 7 at the address Ai simultaneously transmits from the terminal at the address A2 at the response timing of the terminal paging signal following the paging signal at the address A2 from the receiver 10. A current signal is output which destroys the response data to be made into all-one break data.

For this reason, the receiver 10 receives the break data which becomes all 1 at the timing of the terminal response signal from the address A2, and judges the reception of the interrupt signal. Subsequently, the receiver 10 transmits a call signal having the interrupt confirmation command C2. The terminal at the address Ai that has transmitted the interrupt signal returns interrupt response data in response to the interrupt confirmation command C2. The receiver 10 that has received the interrupt response data sequentially transmits a search signal C3 and a call signal for group search for the group address G1.

The interrupt response data to the interrupt confirmation command C2 from the receiver 10 includes, for example, whether the cause of the interrupt is the fire detection output of the transmitter 26 or the ON / OFF −
Output information indicating whether the fire was detected by 1, 24-2,... In addition, since the analog smoke detector 16 and the analog heat detector 18 have a function as an on / off sensor by setting a pre-alarm level and a fire level in addition to analog data, the fire detection based on the alarm level is performed. Or detailed information such as fire detection by fire level.

If such detailed information on the cause of the interrupt is obtained, for example, a fire signal from the transmitter 26 can be reliably determined to be a fire. As soon as the fire detection of the transmitter 26 is recognized from the input response data, the alarm unit 38 outputs an alarm bell or an alarm message. If a fire is detected from a sensor other than the transmitter 26, a pre-alarm is issued to prepare for the next fire determination.

The call control unit 3 and the interrupt processing unit 4 of the receiver 10 and the call response unit 6 and the interrupt transmission unit 7 on the terminal side.
Is disclosed in Japanese Patent Application No. 3-214882 (Japanese Unexamined Patent Application Publication No.
No.-6492). Next, details of the terminal control unit 8 will be described. In the case of the terminal control unit 8 of the sensor repeater 14, the sensor control operation including the test command from the call control unit 3 of the receiver 10 is performed to perform the sensor test operation. A polling call signal is sent between the control signals. Upon receiving the test command, the terminal control unit 8 creates a state similar to that when the on / off detector or the transmitter detects a fire in the detector line, and obtains a simulated fire signal.

The fire signal from the test is A / D converted based on a sampling command from the receiver 10, stored in a memory, and transmitted as response data to a subsequent calling command. The test data thus obtained in the sensor test is sent to the receiver 10 by ordinary polling, and the interrupt transmission unit 7 does not transmit an interrupt signal. On the other hand, during the test of another terminal, A
When a fire is determined from the D-converted detection data, the interrupt transmitting unit 7 transmits the interrupt signal to the receiver 10 at the response timing of the control signal including the test command and the calling signal inserted between the control signals. Then, the interrupt processing by the interrupt processing unit 4 is started.

When normal test data is obtained from the terminal by a normal call, the periodic check unit 5 determines that the terminal test has been completed, and specifies a terminal address to transmit a test end command to the call control unit 3. To instruct. The test operation by the terminal control unit 9 performs a processing operation specific to each of the sensor repeater 14, the analog smoke sensor 16, and the analog heat sensor 18.

On the other hand, the call control unit 3 provided in the control unit 32 of the receiver transmits a control signal by sequentially designating the address of the control repeater 20 when a fire is received, and transmits the control signal to the area bell indicated as the control load 30. It performs sound control and fire door closing control.
Also at the time of transmission of this control signal, a call signal for collecting terminal information is inserted between the control signals and transmitted. The control repeater 20 is provided with at least the call responding unit 6 and the terminal control unit 8 shown in the sensor repeater 14. Upon receiving a call command by designating its own address from the receiver 10, the terminal control unit 8 of the control repeater 20 returns a bit response indicating a normal or failure state. Further, upon receiving a control command designating its own address from the receiver 10, the terminal control unit 8 of the control repeater 20 drives the control load 30 according to the control command. Driving the control load 30 is typically performed using a latching relay, which
The current required for driving the relay flows through the transmission path 12 from the relay.

The relay driving current is, for example,
If the current is greater than the current transmitted as the break signal, the interrupt processing unit 4 of the receiver 10 malfunctions to receive the interrupt signal. However, the interrupt processing unit 4 of the receiver 10
Only the interrupt signal obtained at the terminal response timing following the calling signal is valid. For this reason, even if the same state as the transmission of the interrupt signal is obtained by the current increase due to the relay drive, the interrupt signal is ignored.

FIG. 7 is a circuit block diagram showing an embodiment of the on / off detector shown in FIG. 2 and the detector repeater 14 used for a fire transmitter. In FIG. 7, the repeater 14 is provided with a control circuit 42 including a CPU 44, a memory 46, and an AD converter 48. For the CPU 44, a transmission / reception circuit 50 having a transmission indicator light 52 and an address setting circuit 54 having an address setting switch 56 are provided.

The CPU 44 realizes the functions of the call response unit 6, the interrupt transmission unit 7, and the terminal control unit 8 for performing the sensor test shown in FIG. The AD converter 48 has input ports 1 to n, and the on / off detectors 24-1 to 24-2 correspond to each port.
4- (n-1) and the transmitter 26 are connected. A fire / disconnection detection circuit 64 is individually provided for these detectors.
-1 to 64-n and test circuits 66-1 to 66-n.

The fire / disconnection detection circuit 64-1 receives 24 V DC from the constant voltage circuit 60 during normal operation.
Operates the booster circuit 62 at the timing of receiving the sampling command from the receiver 10 to increase the boosted voltage DC35V.
Receive. The on / off sensor is, for example, the on / off sensor 24
As shown at -1, a warning indicator light 68, resistors R1 and R2, and a sensor contact 70 are provided.

A terminator 72 is connected, and a Zener diode ZD2, a terminating resistor R0 and a Zener diode ZD3 are connected.
Are connected in series. Zener diodes ZD2, ZD3
Is effective depending on the connection polarity. The Zener diode ZD2 is non-conductive when DC 20V is supplied, becomes conductive when receiving the boosted voltage DC 35V from the booster circuit 62, and generates a disconnection monitoring voltage depending on the terminating resistor R0.

FIG. 8 is a circuit diagram showing an equivalent circuit of a fire / disconnection detection circuit together with an on / off detector. In FIG. 8, the fire / disconnection detection circuit 64 causes the constant current source 82 to supply a constant current to the on / off sensor 24 when the boosted voltage DC 35 V 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 indicated by R12, and the line resistance is indicated by Rz.

If there is no disconnection and the sensor contact 70 is open, an inter-line voltage determined by the Zener diode ZD2 and entering, for example, the normal detection region shown in FIG. 9 is obtained, which is divided by the resistors R5 and R6. The voltage is output to the AD converter 48. Further, when the sensor contact 70 is closed by fire detection, the line voltage depends on the sensor impedance R12 and becomes, for example, a voltage within the range of the fire detection region shown in FIG.

Here, the on / off sensor 24 has an internal impedance R12 so as to have a detection voltage V1, for example.
Have decided. On the other hand, the internal impedance of the transmitter 26 is determined so as to have a higher detection voltage V2. Therefore, it is possible to distinguish between fire detection by the on / off sensor and fire detection by the transmitter based on the detection voltage in the fire detection area. Further, at the time of disconnection, the boosted voltage DC35V can be obtained as it is.
A disconnection detection region having an upper limit of 5 V is set.

Referring again to FIG. 7, the transmitter 26 provided corresponding to the port n of the AD converter 48 has the switch contact 7
A switch contact 78 for confirmation display is provided in addition to 6, and a circuit of a confirmation display 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 receiver 10 via the terminal AA of the sensor repeater 14. Terminal AA
When the receiver 10 receives the fire detection signal from the transmitter 26, a signal voltage is applied as an acknowledgment signal, whereby the acknowledgment indicator light 74 is turned on.

The constant voltage circuit 58 supplies 3.2 V DC to the control circuit section 42. Further, a power line from the receiver 10 is connected to the constant voltage circuit 60 by a terminal V, a signal line from the receiver 10 is connected to the constant voltage circuit 58 by a terminal S, and furthermore, the terminal SC is connected to a receiving line. The common line from the machine 10 is connected. Subsequent to the terminals V and S, diodes D1 and D2 and zener diodes ZD1 and ZD2 for noise absorption are provided.

When the CPU 44 receives a test command from the receiver 10, the test circuits 66-1 to 66-n provided in the sensor repeater 14 receive the test command from the receiver 10 and connect the sensor or the transmitter shown in FIG. Test resistors are connected so that corresponding test voltages V1 and V2 can be obtained. This test circuit 66-1
The test operations of .about.66-n are performed together with the boosting operation of the boosting circuit 62 as in the case of the sampling command.

The operation states of the test circuits 66-1 to 66-n are continued until a test end command is received, during which the AD conversion unit 48 performs AD conversion of the detected voltage based on the sampling command. The obtained test data is stored in the memory 46. Further, a control voltage monitoring circuit 80 is provided in the sensor repeater 14, and the booster circuit 62
When the abnormality of the boosted voltage is detected, the voltage failure information is held in the memory 46 via the CPU 44, and the terminal response signal to the normal call is returned including the power failure bit.

FIG. 10 is a block diagram showing an embodiment of the analog smoke detector 16 of FIG. In FIG. 10, the analog heat sensor 16 includes a sensor body 16a and a sensor base 1.
6b. A warning indicator circuit 108 is provided on the sensor base 16b, and a signal line from the receiver 10 is connected to terminals S and SC. The sensor body 16a is provided with a noise absorbing circuit 86 and a transmission signal detecting circuit 88 following the rectifying circuit 84 for making the connection polarity non-polar.

The transmission signal detection circuit 88 detects a call signal in the voltage mode from the receiver 10 and transmits the signal to the transmission control circuit 92.
To supply. The transmission control circuit 92 is provided with a CPU,
As shown in the sensor repeater 14 of FIG. 2, a call response unit 6, an interrupt transmission unit 7, and a terminal control unit 8 for performing a sensor test operation.
Functions are realized. An address / type setting circuit 94 is provided for the transmission control circuit 92.

The smoke detection section is composed of an LED driving circuit 96 and an infrared LE.
D98, a light receiving circuit 100 and an amplifier circuit 102. The infrared LED 98 and the light receiving element of the light receiving circuit 100 are arranged by, for example, a scattered light type smoke detection structure. Further, a test LED 106 is provided, and a test operation is performed by irradiating light corresponding to a predetermined smoke density directly to the light receiving element of the light receiving circuit 100.

The transmission signal from the transmission control circuit 92 is supplied to a response signal output circuit 104, and a normal response signal is transmitted to the receiver 10 in a current mode. As for an interrupt signal based on fire detection, a break current signal is output such that the response signal is set to all 1s on the receiver side. Upon receiving the sampling command from the receiver 10, the transmission control circuit 92 drives the infrared LED 98 to emit light by the LED drive circuit 96, AD-converts the light-receiving signal obtained by the light-receiving circuit 100 and the amplifier circuit 102, and stores it in the memory. I do.

The analog detection data stored in the memory is transmitted by being included in the data field of the response signal when the address coincidence of the calling signal from the receiver 10 is obtained. When a test command is received from the receiver 10, the test LED 106 is driven by the LED drive circuit 96. The light receiving circuit 10 is driven by the light emission drive of the test LED 106.
0 and the detection signal obtained by the amplification circuit 102 are stored and held in a memory as test data by AD conversion based on a sampling command, and are transmitted to a receiver as terminal response data to a call signal specifying its own address.

Further, the transmission control circuit 92 transmits a break current signal by the response signal output circuit 104 and transmits an interrupt signal to the receiver 10 when the fire is judged from the analog detection data sampled by AD conversion. I do. This interrupt signal transmission function is disabled during the sensor test, and the interrupt signal is transmitted even if the analog detection data obtained by AD conversion in the sensor test exceeds the fire level. Absent. When the sensor test operation is completed, the test operation is stopped upon receiving a test end command from the receiver 10.

FIG. 11 is a block diagram showing an embodiment of the analog heat detector 18 of FIG. In FIG. 11, an analog heat sensor connects a signal line from a receiver 10 between terminals S and SC, and subsequently a non-polarity circuit 110, a noise absorption circuit 112, and a constant voltage circuit 11 for outputting DC13V.
4. A current limiting circuit 116 and a constant voltage circuit 118 for outputting DC 10 V are provided. Subsequently, a constant current circuit 120, a heat detection element 122 using a thermistor or the like, and a fire test circuit 124 are provided as a heat detection unit.

On the other hand, a paging signal circuit 126 is provided for the branch line to the noise absorbing circuit 112, detects a paging signal in the voltage mode from the receiver 10, and supplies it to the transmission control circuit 130. The transmission control circuit 130 is provided with a CPU, and has the functions of a call response unit 6, an interrupt transmission unit 7, and a terminal control unit 8 for performing a sensor test, as shown in the sensor repeater 14 of FIG. Can be

For the transmission control circuit 130, the oscillation circuit 1
32, an address / type setting circuit 134, and a reset circuit 136 for performing a power-on reset. Also,
For the control circuit 130 and thereafter, the constant voltage circuit 128
Power supply of C3.2V is performed. Transmission control circuit 130
Is transmitted to the response signal circuit 138 and transmitted to the receiver 10 in the current mode. Further, the response signal circuit 138 is provided with an operation indicator light 139 which blinks according to bit 1.0 of the response signal.

When the transmission control circuit 130 receives the sampling command from the receiver 10, it operates the constant current circuit 120 to supply a constant current to the heat detection element 122,
Since the impedance of 22 is determined by the ambient temperature, a detection voltage depending on the ambient temperature is sampled by AD conversion and stored in the memory. The detection data stored in the memory is transmitted to the receiver 10 by a response signal to a calling signal designating its own address.

When receiving the test command from the receiver 10, the transmission control circuit 130 operates the fire test circuit 124 to perform the test operation. At this time, the constant current circuit 120 is also operated at the same time. The fire test circuit 124 creates an impedance state at a test temperature of 100 ° C. as a connection load of the constant current circuit 120 by a test operation. Therefore, the detection voltage corresponding to the test temperature of 100 ° C. is input to the transmission control circuit 130, and is stored and held in the memory by AD conversion based on the sampling command.

At this time, the detection voltage at the test temperature of 100 ° C. naturally exceeds the fire level, but at the time of the sensor test, the interrupt transmission unit 7 is invalidated based on the test command.
No interrupt signal is transmitted, and the test data is stored in the memory. The test data is transmitted to the receiver 10 as terminal response data for the call signal specifying the own address thereafter. When the test operation is completed, the test operation is stopped upon receiving a test end command.

FIG. 12 is a circuit block diagram showing an embodiment of the control repeater 20 shown in FIG. In FIG. 12, a pair of signal lines 214 is connected between terminals S and SC of the control repeater 20. Following the terminals S and SC, a diode D10 and a zener diode ZD10 for surge absorption are provided.
Is provided. Subsequently, a constant voltage circuit 140 is provided to generate 3.2 V DC required for driving the control IC and the like. Subsequent to the constant voltage circuit 140, a transmission / reception circuit 142 is provided. The transmission / reception circuit 142 is provided with a transmission indicator 144 that blinks in a transmission or reception state.

The transmission / reception circuit 142 detects, for example, transmission data from the receiver 10 from a change in line voltage, and outputs a reception signal to the control circuit 146. The transmission data from the control circuit 146 is converted into a current signal and transmitted to the signal line 114. The address setting circuit 148 for the control circuit 146
And a unique terminal address, specifically, a group address to which the repeater belongs and a unique terminal address are set by an address setting switch 150 using a dip switch.

The control circuit 146 has a CPU, and the CPU implements the functions of the call responding unit 6 and the terminal control unit 8 for driving the load shown in the terminal side of FIG. Also, the control circuit 1
46, a relay drive circuit 154 is provided. The relay drive circuit 154 includes a control load 3 that can be connected to the repeater 20.
Four latching relays 156-1 to 1 corresponding to the number of 0
156-4 are provided.

Latching relays 156-1 to 156-4
Has a set coil S and a reset coil R, the relay contacts of which are connected to a connection terminal D of a power line 115 from the receiver 10 as shown for a latching relay 156-1, for example.
A relay contact 166-1 is provided on the D side. The latching relay 156-1 closes the relay contact 166-1 when the set coil S is energized, and thereafter the closed state of the relay contact 166-1 is mechanically held even when the energization of the set coil S is cut off.

On the other hand, in order to open the relay contact 166-1 which has been closed once, the reset coil R must be energized. Therefore, each of the latching relays 156-1 to 156-4 needs to supply a drive current to the set coil S or the reset coil R at the time of controlling and restoring the load. The flowing current increases and becomes the same as when the break signal is transmitted as the interrupt signal.

The power line 215 from the receiver 10 is connected to the terminal D
D, DDC, and the load connection circuits 164-1 to 164-1.
The corresponding control load 30 is connected via each of 4-4. The load connection circuit has a relay contact 166-1 of a latching relay 156-1 provided in the relay drive circuit 154, as represented by the load connection circuit 164-1. Further, a confirmation detection circuit 168-1 is provided, and a signal line for confirmation is output from the terminal DA1 to the load 30 via the diode D30.

The confirmation detection circuit 168-1 and the relay contact 166-1 are connected to other load connection circuits 164-2 to 14-2.
Similarly, 64-4 is provided in parallel. A voltage monitoring circuit 162 is provided for the confirmation detection circuit 168-1 provided in the load connection circuit 164-1, and the voltage monitoring circuit 162 monitors the power supply voltage obtained by the smoothing circuit 160 via the diode D20. I have.

Here, assuming that the load 30 connected to the load connection circuit 164-1 via the control line is, for example, a release of a fire door, a solenoid coil 170 for driving the release is provided. There is provided a tamper switch 172 which is on the side a in the closed state and switches to the side b when the fire door is opened. Assuming that the control circuit 146 energizes the set coil S of the latching relay 156-1 of the relay drive circuit 154 by a control command from the receiver 10, the relay contact 166-1 provided in the load connection circuit 164-1 closes, The solenoid coil 170 is energized to release, for example, a release holding the fire door open. When the holding of the fire door is released, the tamper switch 172 switches from a side to b side, and the diode D
30 to the control load 30 via the confirmation detection circuit 168-1.
More signal current flows.

The confirmation current detection circuit 168-
1, the light emitting diode of the photocoupler PC2 provided in the control circuit 146 emits light.
The control circuit 146 transmits confirmation detection information to the receiver 10 via the transmission / reception circuit 142 by interruption. The light emitting diodes corresponding to the phototransistors of the photocouplers PC3 to PC5 of the control circuit 146 are connected to the remaining load connection circuits 164-2 to 164-2.
4-4 is provided in a confirmation detection circuit (not shown).

Further, when the control circuit 146 receives the sampling command, the voltage monitoring circuit 162 operates. That is, the control circuit 14 receives the sampling command.
Reference numeral 6 drives the light emitting diode of the photocoupler PC1 to emit light, receives the light by the phototransistor of the photocoupler PC1 provided in the voltage monitoring circuit 162, and checks whether the power supply voltage obtained from the smoothing circuit 160 is normal.

If the power supply voltage is normal, the voltage monitoring circuit 1
The light emitting diode of the photocoupler PC6 provided at 62 is driven to emit light, and the photocoupler PC6 of the control circuit 146 is driven.
In this case, a normal bit of the response data is set. On the other hand, when the power supply voltage is not obtained due to the disconnection of the power supply line 115 or the like, the voltage monitoring circuit 1
The light-emitting diode of the photocoupler PC6 provided at 62 is not driven to emit light, and the photocoupler PC6 of the signal circuit is not driven.
The control circuit 146 sets a data bit indicating a power supply abnormality and transmits data indicating a power supply failure to the receiver 10 as response data of a subsequent call command.

FIG. 13 is a flowchart showing a processing operation by the control unit 32 of the receiver 10 shown in FIG. In FIG. 13, when the power of the receiver 10 is turned on, initialization is performed in step S1. Subsequently, at step S2, the terminal address n is set to n = 1, and then at step S3, polling for the terminal address n is performed. That is, a call signal having a terminal address n and a call command is transmitted.

Subsequently, in step S4, a response signal from the terminal to the polling is received, and it is checked in step S5 whether or not there is a state change in the data field of the response signal. If there is a state change in the response signal, it is checked in step S6 whether or not an interrupt signal has been received. Here, the interrupt signal is, for example, a case in which all bits become 1. If it is not an interrupt signal, the process proceeds to step S7, and a normal response process is performed.

This normal processing is performed by the sensor repeater 14.
The analog smoke detector 16 and the analog heat detector 18 handle analog detection data, and the control repeater 20 performs a failure bit on the basis of a normal bit or a failure bit. And so on. on the other hand,
If it is determined in step S6 that an interrupt signal having all bits 1 has been received, the flow advances to step S8 to perform an interrupt handling process.
In this interrupt handling process, first, an interrupt confirmation command is issued, detailed information is collected from the terminals, and then a search command is issued, and a group search for identifying the terminal that has caused the interrupt is performed. Subsequently, the process proceeds to step S9, where it is checked whether or not to perform terminal control. The terminal control includes a terminal test at the time of periodic inspection and a control of a terminal device at the time of receiving a fire. If the terminal control is set, step S1
The process proceeds to 0, and the control signal is transmitted.

Subsequently, in step S11, it is checked whether or not it is a batch sampling timing. The sampling timing is set, for example, every second. When the sampling timing is reached, a sampling command is transmitted in step S12, and the batch AD conversion is performed on the terminal side. To perform data sampling. Subsequently, in step S13, it is checked whether or not the final address n = 127. If not, the terminal address is incremented by one in step S15, and polling of the next terminal address is performed in step S3. If it is the last address, the process returns to step S2, and repeats polling from the first terminal address n = 1.

According to the processing in steps S2 to S15, during the sensor test or the control of the terminal load, the transmission of the calling signal by the terminal polling in step S3 and the transmission of the control signal in step S10 alternately. Will be repeated. FIG. 14 is a flowchart showing the processing operation on the terminal side. In FIG. 14, when power is turned on, initialization is performed in step S1, and in step S2
Monitor for signal reception. When a signal is received, it is checked in step S3 whether or not the command is a sampling command.
If it is not a sampling command, it is checked in step S4 whether it is a call command. If it is not a call command, it is checked in step S5 whether it is a control command. If it is a control command, control such as a sensor test and load drive is executed in step S6, and a response is transmitted in step S7.

When the sampling command is discriminated in step S3, the process proceeds to step S8, where terminal data is sampled, that is, terminal data is fetched by so-called batch AD conversion. Subsequently, in step S9, it is determined from the sampling data whether a fire has occurred. If it is not a fire, the process proceeds to step S10, and it is determined whether or not the wire is broken. If it is a fire, the process proceeds to step S11, where a fire bit is set. If it is broken, a failure bit is set in step S12.

A fire is determined in step S9 by sampling the terminal data in step S8, and step S11 is performed.
When the call command from the receiver is determined in step S4 with the fire bit set, it is checked whether the fire bit is on. At this time, since the fire bit is set and turned on in step S11, the process proceeds to step S14, where an interrupt signal is transmitted as a break signal for increasing the line current.

FIG. 15 shows a processing operation when a fire is detected by the sensor repeater 14 in a state where the control signal is continuously transmitted from the receiver 10 to the control terminal 20 in FIG. It is a time chart. First, the receiver issues a control command, and the control repeater performs load control by relay driving in response to the control command.
The received current increases by the amount of current consumed by driving the relay circuit. Subsequently, the receiver 10 issues a call command following the control command. At this time, it is assumed that a fire is detected in a certain sensor repeater 14 as shown at time t1.

In response to the call command, response data is transmitted from the terminal designated by the address, and the response data is performed in the current mode, so that a pulse-like current change as shown in the illustrated reception current is obtained. Next, it is assumed that a batch sampling command is issued on condition that the sampling timing has been reached. In response to the sampling command, all the terminals including the sensor repeater 14 perform a sampling operation at the same time, and AD signals of the detection signals at that time are stored in the memory.

Further, a fire determination is made from the AD-converted detection data, and at the time t1, the fire bit is set from off to on in the sensor repeater 14 which performs fire detection. Next, a control command designating the address of the control repeater 20 shown in the time chart is issued, and the received current increases by controlling the load by driving the relay.

Subsequently, a call command is issued. When this calling command is determined by the sensor repeater 14, an interrupt transmission operation is performed because the fire bit is ON at this time. That is, a break signal for increasing the current is transmitted to the receiver 10 so as to make all bits 1 transmitted from any terminal at that time, and the reception current is increased to transmit the interrupt signal.

The receiver 10, which has transmitted the interrupt signal, issues an interrupt confirmation command to collect detailed information on the cause of the interrupt. After that, group search by issuing search command,
Further, the sensor repeater 14 that has detected the fire by the search within the group is detected and an alarm is displayed. In the timing chart of the terminal control shown in FIG. 15, the received current becomes all bits 1 by the relay drive on the control repeater side, and becomes the same state as the interrupt signal due to the transmission of the break signal. The determination of the interrupt signal is made only with respect to the response timing to the call command. Therefore, even if the same reception current as the interrupt signal which becomes all bits 1 at the response timing of the control command is obtained, it is ignored and an interrupt malfunction occurs. Never.

FIG. 16 is a time chart showing a processing operation when a sensor test is performed by sequentially designating terminal addresses from the receiver 10. In FIG. 16, when the receiver 10 issues a test command by designating a certain terminal address, the reception current slightly increases in the test operation at the designated terminal. Next, when a call command is issued, a response signal from the terminal that matches the call address is obtained as a change in the received current.

On the other hand, suppose that a certain sensor repeater 14 has detected a fire at the timing of the call command as shown at time t1. In response to the sampling command 3, the sampling operation by AD conversion is performed in all the terminals including the relay unit for the sensor in which the fire is detected, and at the same time, the presence or absence of a fire is determined from the sampling data. In the sensor repeater 14, the fire bit is turned on because the fire signal has been obtained. Also in this sampling operation, a change in the reception current accompanying the sampling operation occurs.

Subsequently, a test command is issued, and subsequently, a call command is issued. Is determined by the detector repeater 14 that performs fire detection,
At time t3, an interrupt signal transmission operation is performed based on the ON state of the fire bit. That is, at the response timing of the call command, a break signal for increasing the reception current so that the response signal transmitted from any terminal is destroyed and all bits are set to 1 is transmitted. 1
Send to 0.

When the interrupt signal is received by the receiver 10, an interrupt confirmation command is issued, and the detailed interrupt information is returned from the repeater 14 for the detector that has detected the fire. A group search and an intra-group search for specifying the sensor repeater 14 that has detected a fire by a command are performed. Even during such a test operation, since a call command is issued between test commands, if a fire is detected during the test, an interrupt signal is transmitted at a timing of a response period of the call command. Is performed, and even during the test, a fire occurrence can be quickly known and an alarm can be given.

In the above embodiment, the sensor control and the drive control of the terminal equipment are taken as examples of the terminal control.
The type of terminal control can be appropriately determined as needed. In the above embodiment, a break signal for destroying a terminal response signal is transmitted as an interrupt signal. However, the present invention is not limited to this, and an appropriate interrupt code may be used. In the above embodiment, the interrupt confirmation command is issued after the reception of the interrupt signal to return the detailed interrupt information. However, if the detailed information is included in the first interrupt code signal, the interrupt is performed. It is not necessary to issue an embedding confirmation command.

Further, in the above embodiment, a case where a receiver 10 is provided as the receiving means 1 in the principle explanatory diagram of FIG. 1 is taken as an example, but the receiving means 1 includes a receiver and a local reception line on a transmission line from the receiver. Or connect a terminal to the transmission path from the relay panel, or connect only the relay panel as a local receiver with multiple transmission paths and connect the terminal to the transmission path from each relay panel Including configuration.

[0087]

As described above, according to the present invention, a call signal is inserted between control signals and transmitted during control of a terminal or a test of a sensor. Even if a fire occurs, an interrupt signal indicating the occurrence of the fire is transmitted at the response timing of the call signal, so that the fire can be preferentially processed.

Even if the reception current is increased by the terminal control and the reception current is the same as that at the time of transmission of the interrupt signal, the interrupt signal is ignored at the response timing of the control signal and only at the response timing of the call signal. Since the interrupt signal is processed as a valid signal, the malfunction of the interrupt does not occur due to the current amplification by the load control, and the reliability of the interrupt process can be improved.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating 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 a terminal.

FIG. 6 is a time chart showing an interrupt notification of occurrence of an abnormality due to transmission of a break signal.

FIG. 7 is a configuration diagram of an embodiment of the repeater for the sensor of FIG. 2;

8 is a circuit diagram showing an equivalent circuit at the time of the fire detection operation of FIG.

FIG. 9 is an explanatory diagram showing fire, normal, and disconnection detection areas in FIG. 8;

FIG. 10 is a configuration diagram of an embodiment of the analog smoke detector of FIG. 2;

FIG. 11 is a configuration diagram of an embodiment of the analog heat detector of FIG. 2;

FIG. 12 is a configuration diagram of an embodiment of the control repeater of FIG. 2;

FIG. 13 is a flowchart showing the processing operation on the receiver side of FIG. 2;

FIG. 14 is a flowchart showing the processing operation on the terminal side in FIG. 2;

FIG. 15 is a time chart showing a control operation of a terminal load by a control command from a receiver.

FIG. 16 is a time chart showing a test operation of the terminal by a test command from the receiver.

[Explanation of symbols]

 1: Receiving means 2: Terminal 3: Call control unit 4: Interrupt control unit 5: Periodic inspection unit 6: Call response unit 7: Interrupt transmission unit 8: Terminal control unit (load control unit, test control unit) 10: Receiver 12: Transmission path 14: Sensor repeater 16: Analog smoke detector 18: Analog heat sensor 20: Control repeater 22: Sensor line 24-1, 24-2: On / off sensor 26: Transmitter 28: control line 30: control load 32: control unit 34: display unit 36: operation unit 38: sounding unit 42, 146: control circuit 44: CPU 46: memory 48: AD conversion unit 50, 142: transmission / reception circuit 52, 144 : Transmission indicator lights 54, 148: Address setting circuits 56, 150: Address setting switches 58, 60, 90, 140: Constant voltage circuit 62: Boosting circuits 64-1 to 64-n: Fire disconnection detection circuit 66-1 66-n: Test circuit 68: Alarm indicator lamp 70: Sensor contact 72: Terminator 74: Confirmation indicator lamp 76, 78: Switch contact 80: Control voltage monitoring circuit 82: Constant current source 84: Rectifier circuit 86 : Noise absorption circuit 88: Transmission signal detection circuit 92: Transmission control circuit 94,134: Address / type setting circuit 96: LED drive circuit 100: Light receiving circuit 102: Amplification circuit 104: Response signal output circuit 106: Test LED 110: Non-polar Circuit 112: noise absorbing circuit 116: current limiting circuit 120: constant current circuit 122: heat detecting element (thermistor) 124: fire test circuit 126: calling signal circuit 130: CPU 132: oscillation circuit 136: reset circuit 139: operation display Light 154: Relay drive circuit 156-1 to 156-4: Latching relay 160: Smoothing circuit 162: Voltage monitoring circuit 164-1 to 164-4: Load connection circuit 166-1: Relay contact 168-1: Confirmation detection circuit 170: Solenoid coil 172: Tamper switch 214: Signal line 215: Drive line

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G08B 23/00-31/00

Claims (7)

(57) [Claims] 1. A disaster prevention monitoring device for connecting a plurality of terminals to a transmission path from a receiving means, and collecting terminal information or controlling a terminal by designating a terminal address from the receiving means, wherein: When collecting terminal information, a call signal is transmitted by sequentially specifying a terminal address, and when controlling a terminal, a control signal specifying a terminal address is transmitted, and the control signal is continuously transmitted.
When transmitting, a call control unit that inserts the call signal between control signals and transmits the call signal, and executes an interrupt process by determining an interrupt signal from the terminal only at a response timing of the call signal. A call responding unit that transmits terminal information in response to a call signal when a match between the call address and the own address from the receiving unit is obtained, At the time of abnormality detection, an interrupt transmitting unit that transmits an interrupt signal notifying the occurrence of abnormality to the receiving unit using only the response timing of the calling signal from the receiving unit, and a call address and a self address of the calling address from the receiving unit. And a terminal control unit that controls a terminal according to a control signal when a match is obtained. 2. The disaster prevention monitoring device according to claim 1, further comprising: a call control unit of the receiving unit, wherein the control signal includes a command signal instructing an operation of a terminal load between the command signals. A disaster prevention monitoring device that transmits a call signal to a terminal. 3. The disaster prevention monitoring device according to claim 1 , further comprising: a call control unit of the receiving means, wherein the control signal is provided between a test command signal for instructing an operation test of a terminal and a test command signal. A disaster prevention monitoring device, wherein a call signal to the terminal is inserted and transmitted. 4. The disaster prevention monitoring device according to claim 1, wherein the interrupt transmitting unit of the terminal disables the terminal response signal at a transmission timing of the terminal response signal when detecting an abnormality. A disaster prevention monitoring device characterized by transmitting an error and notifying the receiving means of the occurrence of an abnormality. 5. The disaster prevention monitoring device according to claim 1, wherein the interrupt processing unit of the receiving means searches for and identifies a terminal detecting an abnormality when receiving an interrupt signal from the terminal. A disaster prevention monitoring device that performs a search process to perform a search. 6. The disaster prevention monitoring device according to claim 1, wherein said receiving means comprises one or more of a receiver alone, a receiver and a local receiver connected to a transmission path from the receiver. A disaster prevention monitoring device comprising only a relay panel or a relay panel as a plurality of local receivers connected to each other via a transmission line. 7. A disaster prevention monitoring method in which a plurality of terminals are connected to a transmission path from a receiving means and a terminal address is designated by the receiving means to collect terminal information or control the terminal. If the specified control signal is
When the call signal is transmitted between the control signal and the control signal, the receiving means transmits the call signal to the terminal side, and when the call address from the receiving means coincides with the own address. Transmitting response information from the terminal to the receiving means in response to the call signal of the terminal; controlling the terminal in accordance with a control command when a match between the call address and the own address from the receiving means is obtained; When collecting terminal information at the time of detection of an error in the receiver, a process of transmitting an interrupt signal to notify the receiver of the occurrence of an error using only the response timing of a call signal other than the control signal from the receiver, A step of executing an interrupt process by determining an interrupt signal only at a response timing of the call signal.