JP2902254B2 - Disaster prevention monitoring device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disaster prevention monitoring device for monitoring an abnormality such as a fire and remotely controlling terminal equipment such as a district bell and a fire door when an abnormality occurs.

[0002]

2. Description of the Related Art Conventionally, as a remote control device of a terminal device used in this kind of disaster prevention monitoring device, for example, Japanese Utility Model Application Laid-Open No.
No. 7390 is known. In this remote control device, a terminal control device is called by an address designation from a CPU serving as control means provided in a receiver, a control command is sent, and a set winding of a latching relay provided in the terminal control device is energized. Then, the relay contacts are closed and the bell wire is energized, for example, to ring the district bell. Also, at the time of restoration, the terminal control device is similarly called and a restoration command is sent, the reset winding of the latching relay is energized to open the relay contact, and the ringing of the district bell is stopped.

[0003]

However, in remote control of a terminal device in such a conventional disaster prevention monitoring device, when the terminal device is operated, the controlled terminal is stored and restored. When the operation is performed, the recovery control must be performed by specifying the terminal controlled based on the stored terminal information, and there has been a problem that the process of the control CPU on the receiver side becomes busy.

[0004] In the case of recovery after controlling all terminals, a recovery command must be sent to each terminal. When the number of terminals increases, recovery takes time.
During that time, there is a problem that the processing capability of the control CPU of the receiver is reduced. Specifically, when the disaster prevention monitoring device is installed, the terminal will be restored after the terminal is actually operated and a confirmation test is performed.However, when the terminal is restored, the terminal address and the control command etc. The composed message must be transmitted, and it takes too much time to recover all the terminals, resulting in a decrease in operability.

Further, if a fire signal is received during the recovery control of a plurality of terminals controlled at the time of periodic inspection or the like, the recovery control may delay the fire reception processing by the control CPU of the busy receiver. Was. On the other hand, it is conceivable to send a common collective restoration command from the receiver to all terminals and collectively restore the controlled terminals in a short time.
However, since the restoration of the load is performed by energizing the reset winding of the latching relay, if the terminals are simultaneously restored and controlled, an excessive current including the reset current of the terminal latching relay flows to the power supply line from the receiver, There is a problem that the power supply goes down, and increasing the power supply capacity to meet the simultaneous recovery has a problem that the cost is increased.

SUMMARY OF THE INVENTION The present invention has been made in view of such a conventional problem, and provides a disaster prevention monitoring device capable of reducing the load on the recovery control on the receiver side without increasing the power supply capacity. With the goal.

[0007]

FIG. 1 is a diagram illustrating the principle of the present invention. First, according to the present invention, a disaster prevention monitoring device that transmits a command signal specifying a terminal address from a receiving means 1 to a terminal 2 and performs driving or recovery based on the command signal received by the terminal 2 whose own address matches the terminal address Target.

[0008] In the present invention per such disaster prevention monitoring system, Ru Bei <br/> give a recovery instruction unit 3 to recover the bulk recovery command signal to recover collectively a plurality of terminals 2 to the receiving means 1 .

[0009] Then, the terminal 2 receives a signal from the receiving means 1.
Repeater connected to the line and one or more controls from the repeater
Connected with the control load 26 connected to the line,
When receiving a batch recovery command signal from the old command means 3
The control load connected to the repeater by the recovery means 4
26 in order at a specific time interval predetermined for each control line.
Next will be restored.

[0010] As a specific embodiment of the present invention, the receiving means 1
Recovery command means provided in the 3 sequentially issues a bulk recovery command with a group address that groups a plurality of terminals, the recovery unit 4 provided in the RELAY instrument, group address belongs from the receiving means 1 self Is received, the control load 26 connected to the repeater is restored.

The repeater drives the control load by energizing the set winding of the latching relay, and restores the control load by energizing the reset winding of the latching relay.

Further, the configuration of the receiving means 1 is composed of only a receiver, a terminal is connected to the receiver, and one or more local receivers connected to the receiver and a transmission path from the receiver are connected. A terminal is connected to each of the relay boards, and a terminal is connected to each of the relay boards. The terminal is connected only to a plurality of local receivers connected to each other via a transmission line, and the terminals are connected to each of the relay boards.

[0013]

According to such a disaster prevention monitoring device of the present invention, restoration of controlled terminals is restored simultaneously for all terminals or for each of a plurality of terminals. In addition, the time required for terminal restoration is short, and the operability at the time of device construction and inspection can be improved.

[0014] Even when the terminal is restored by energizing the reset winding of the latching relay, the terminal is collectively restored by a repeater unit, a control line connecting a load to the repeater unit, or a grouped repeater unit. Since the current is sequentially performed in accordance with the preset specific time, the increase in the current during the restoration control can be suppressed to a value corresponding to the power supply capacity, and the power down or the increase in the capacity of the receiver power supply can be unnecessary.

[0015]

FIG. 2 is an explanatory diagram showing the overall configuration of a disaster prevention monitoring device according to the present invention. In FIG. 2, reference numeral 10 denotes a receiver, which is installed in a central monitoring room, a management room, or the like. A transmission line 12 is drawn out of the receiver 10, and the repeater 1
6, analog sensor 18 and control repeaters 20-1 and 20-2
0-2 are connected. A power / signal line 22 is drawn out of the sensor repeater 16 and is connected to the power / signal line 22 by one.
Alternatively, a plurality of on / off sensors 24 are connected.

The analog sensor 18 has a function as a repeater, and sends an analog signal detected by a heat sensor or a smoke density sensor to the receiver 10. Control repeater 20
In this embodiment, four control loads 26 are connected by a control line. As the control load 26, appropriate disaster prevention equipment such as a district bell, a release of a fire door, a solenoid or a motor for driving a damper of a smoke exhaust port, and the like are targeted.

On the other hand, the receiver 10 is provided with a control unit 28 using a CPU.
An operation unit 32, a sounding unit 36, and a power supply unit 38 are provided. The control unit 28 of the receiver 10 creates a message having a format including a terminal address and a control command, sends the message to the transmission line 12, and transmits the message to the sensor repeater 16 and the analog sensor 1
8 and the control repeaters 20-1 and 20-2.

Detector repeater 16, analog detector 18
In addition, a unique terminal address is preset in each of the control repeaters 20. When the own address matches the terminal address from the receiver 10, processing based on the received command signal is executed. In this case, in response to the polling in the steady state, the relay 16 for the detector and the analog detector 18 generate their own address and response data of the detection information at that time since the return command of the detection information is included. It is returned to the receiver 10.

In the control repeater 20, control processing is not performed because there is no special control command in normal times, but in the case of fire, the control load 26 is driven following the terminal address. Is received, and the control load 26 is driven based on the received control command. When a recovery command signal is received after operating the control load 26, the recovery control of the control load 26 is performed.

In the present invention, for the recovery control of the control load 26, a batch recovery command signal is transmitted from the receiver 10. That is, the operation unit 32 of the receiver 10 is provided with a restoration switch 34. When the restoration is desired after controlling the control load 26 of the terminal, the restoration switch 34 is operated and the control unit 28 is controlled by the control repeater 20. , The transmission data including the batch recovery command is sent, and the simultaneous recovery operation of the control load 26 is performed.

The form of the simultaneous recovery of the control load 26 of the present invention is as follows: collective recovery of the control repeaters 20; collective recovery of each control line drawn from the control repeaters 20; In this embodiment, the collective recovery for each group of control repeaters 20 will be described as an example.

FIG. 3 is a circuit block diagram showing one embodiment of the control repeater 20 shown in FIG. In FIG.
A pair of signal lines 1 is connected between the terminals S and SC of the control repeater 20.
4 are connected. Diode D following terminals S and SC
1 and a zener diode ZD1 for surge absorption. Subsequently, a constant voltage circuit 40 is provided to generate 3.2 V DC required for driving the control IC and the like. Subsequent to the constant voltage circuit 40, a transmission / reception circuit 42 is provided.
Is provided.

The transmission / reception circuit 42 detects, for example, transmission data from the receiver 10 from a change in line voltage, and outputs a reception signal to the control circuit 46. The transmission data from the control circuit 46 is converted into a current signal and transmitted to the signal line 12. An address setting circuit 48 is provided for the control circuit 46. The address setting circuit 48 is provided with an address setting switch 50 using a dip switch, and sets a predetermined terminal address, specifically, a group address to which the repeater belongs and a unique terminal address.

The control circuit 46 is provided with a delay time setting circuit 52. The delay time setting circuit 52, when receiving the control load simultaneous recovery command from the receiver side, determines the timing of batch recovery of, for example, every four control lines for the control load 26 drawn from the repeater 20. A delay time has been set. Further, the control circuit 4
6, a relay driving circuit 54 is provided, and the relay driving circuit 54 has four latching relays 56-1 to 56-4 corresponding to the number of control loads 26 connectable to the repeater 20.
Is provided.

Each of the latching relays 56-1 to 56-4 has a set winding S and a reset winding R. The relay contacts of the latching relays 56-1 to 56-4 are provided as relay contacts 66-1 on the connection terminal DD side of the power supply line 15 from the receiver 10, as shown, for example, for the latching relay 56-1. The latching relay 56-1 closes the relay contact 66-1 when the set winding S is energized.
The closed state of 6-1 is mechanically held.

On the other hand, in order to open the relay contact 66-1, which has been closed once, the reset winding R must be energized.
Therefore, it is necessary for each of the latching relays 56-1 to 56-4 to supply a drive current to the set winding S or the reset winding R when controlling and restoring the load. A power line 15 from the receiver 10 is connected to terminals DD and DDC,
The corresponding control load 26 is connected via each of the load connection circuits 64-1 to 64-4. Load connection circuit 64
As represented by the load connection circuit 64-1, -1 to 64-4 have a relay contact 66-1 of a latching relay 56-1 provided in the relay drive circuit 54. A confirmation detection circuit 68-1 is provided, and a signal line for confirmation is output from the terminal DA to the load 26 via the diode D3.

The confirmation detection circuit 68-1 and the relay contact 66-1 are connected to other load connection circuits 64-2 to 64-4.
The side is similarly provided in parallel. A voltage monitoring circuit 62 is provided in common with the confirmation detection circuits 68-1 provided in the load connection circuits 64-1 to 64-4, and the voltage monitoring circuit 62 is obtained by the smoothing circuit 60 via the diode D2. Monitors power supply voltage.

Here, the load 26 connected to the load connection circuit 64-1 via a control line will be described. For example, taking the release of a fire door as an example, a solenoid coil 70 for driving the release is provided, and further, a tamper switch 72 that switches to the a side when the fire door is closed and switches to the b side when the fire door opens is provided. Have been. Assuming that the control circuit 46 energizes the set winding S of the latching relay 56-1 of the relay drive circuit 54 by a control command signal from the receiver 10, the relay contact 66-1 provided in the load connection circuit 64-1 is turned on. When closed, the solenoid coil 70 is energized to release, for example, the release holding the fire door open. When the holding of the fire door is released, the tamper switch 72 is released.
Is switched from the a side to the b side, and a signal current flows from the confirmation detection circuit to the control load 26 side via the diode D3.

The confirmation current detection circuit 68-1 is generated by this signal current.
The light emitting diode of the photocoupler PC2 provided in the control circuit 46 emits light, and the light is received by the phototransistor of the photocoupler PC2 provided in the control circuit 46. The control circuit 46 confirms the interruption to the receiver 10 via the transmission / reception circuit 42 by interruption. Send information. The photocoupler PC of the control circuit 46
Light emitting diodes corresponding to the phototransistors 3 to PC5 are provided in confirmation detection circuits (not shown) of the remaining load connection circuits 64-2 to 64-4.

Further, when the control circuit 46 receives the voltage monitoring command, the voltage monitoring circuit 62 operates. That is,
At the time of control based on the voltage monitoring command by the control circuit 46, the light emitting diode of the photocoupler PC1 is driven to emit light, the phototransistor of the photocoupler PC1 provided in the voltage monitoring circuit 62 receives light, and the power supply voltage obtained from the smoothing circuit 60 is Check if it is normal.

If the power supply voltage is normal, the voltage monitoring circuit 6
The light emitting diode of the photocoupler PC6 provided in 2 is driven to emit light and received by the phototransistor of the photocoupler PC6 of the control circuit 46. 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 15 or the like, the light emitting drive of the light emitting diode of the photocoupler PC6 provided in the voltage monitoring circuit 62 is not performed, and the phototransistor of the photocoupler PC6 of the signal circuit is not driven. Since there is no light receiving operation, the control circuit 46
Sets a data bit indicating a power failure and returns data indicating a power failure to the receiver 10 in response to polling.

The power supply abnormality detection response function in the control circuit 46 can be suppressed by the power supply line failure mask circuit 58. That is, by connecting the jumper wire 74 between the terminals NT and NTC drawn from the power supply line failure mask circuit 58 and short-circuiting, the bit indicating the power supply line failure is forcibly erased by the mask. In FIG. 3, the control loads are connected to the four control lines from the control repeater 20 by connecting a plurality of control loads 26 in parallel as in a load connection circuit 64-1 and driving them in line units. May be performed, or one control load 26 may be connected as shown in the load connection circuit 64-4, and drive and recovery may be performed in units of load.

FIG. 4 is a timing chart showing a call and a response in the steady monitoring state between the receiver 10 and the repeater shown in FIG. In FIG. 4, a receiver 10 includes a calling command C1 and terminal addresses A1, A2, A3, A4,.
・ Paging signals including. As shown in FIG. 5, the call signal includes an 8-bit command field, an 8-bit address field, and a 3-byte 8-bit checksum field.

Before and after each byte, a start bit, a parity bit and a stop bit are provided one by one. The command field is used to indicate to all terminals what the paging signal from the receiver 10 means regardless of the address. In the collective recovery processing of the present invention, group addresses sequentially grouped are set in the address field with the collective recovery command set in the command field and transmitted to the terminal.

When the matching of the address contained in the calling signal is obtained with respect to the calling signal from the receiver 10, the terminal response signal is output as shown in the repeaters 20-1, 20-2 and 20-3. Sent out. As shown in FIG. 6, the terminal response signal is composed of two bytes of an 8-bit data field and an 8-bit checksum field, and a start bit, a parity bit, and a stop bit are provided before and after each byte. I have.

FIG. 7 shows a control unit 2 provided in the receiver 10 of FIG.
8 is a flowchart illustrating a processing operation according to the second embodiment. FIG.
First, when the power is turned on, predetermined initial settings are performed in step S1, and in step S2, the repeater address n for polling is set to the first address n = 1. Subsequently, in step S3, the relay at the address n = 1 is polled, and a response signal is processed in step S4 after waiting for a response.

Subsequently, in step S5, it is checked whether the recovery switch 34 provided on the operation unit 32 has been operated. If the recovery switch 34 has not been operated, the process proceeds to step S6, where it is checked whether or not the repeater maximum address n = 127 has been reached. If not, the repeater address n is incremented by one in step S7. In S3, the polling for the next repeater address is repeated.

By such processing, the control loads connected to all the control repeaters 20 are controlled to check the operation, for example, for equipment inspection, and then the recovery switch 34 is operated to recover. If so, the operation of the recovery switch is determined in step S5, and the process proceeds to steps S8 to S10. The control unit 28 of the receiver 10 groups the control repeaters 20 in a predetermined unit, for example, two units, and performs a unique delay time T ₁ to T ₁ to perform simultaneous recovery for each group address 1 to x. Tn is set in advance.
Note that the first delay time T ₁ may be T ₁ = 0. Therefore, when the operation of the recovery switch is determined in step S5, the recovery command for the group address 1 is immediately transmitted in step S8 because the delay time T ₁ = 0 at this time with reference to the table of FIG. Hereinafter, steps S9 to S1
As shown by 0, the recovery commands for the groups _{2 to} x are sequentially transmitted as the predetermined delay times T _{2 to} Tx elapse.

FIG. 9 is a flowchart showing the processing operation of the control repeater 20 shown in FIG. In FIG. 9, when the power is first turned on, predetermined initial settings are performed in step S1, and reception of a signal from the receiver 10 is waited in step S2. When a signal from the receiver 10 is received, the process proceeds to step S3, and it is checked whether the received address matches the own address or whether the received group address matches the group address to which the self belongs.

If a signal including a control command for driving a control load is received from the receiver 10,
After checking with the own address whether or not the command is a restoration command in step S4, if it is determined in step S5 that the command is a control command, the process proceeds to step S6 to control the load. Of course, if there is no recovery command or control command, no processing is performed, and the process proceeds to step S7.
In step S7, if there is nothing, a steady response is returned, and if there is an abnormality, an abnormal response is returned.

On the other hand, if a recovery command specifying a group address has been transmitted from the receiver 10, it is determined in step S3 that the group addresses match, then in step S4 the recovery command is determined, and steps S8 to S1 are performed.
It proceeds to the process of 0. Here, the control repeater 2 shown in FIG.
For example, the delay time corresponding to the line number of the control line for the control load 26 as shown in FIG.

FIG. 10A shows a case where the number of control lines of the control load 26 shown in FIG. 3 is four. The line number 1 is a delay time 0, and the reset winding of the latching relay becomes as the line numbers 2, 3, and 4 become. delay time is stored which is incremented by a predetermined time [Delta] T ₁ exceeding the driving time required to recover the line.
FIG. 10B shows a setting state of the delay time when the control repeater 20 has eight control lines.

When the process proceeds to step S8 in the determination of the restoration command in step S4 of FIG. 9, first, the reset operation of the latching relay of the control line 1 is performed with a delay time of zero. Subsequently, when the delay time of the control line 2 has been set and elapsed, the corresponding latching relay is reset in step S9. Hereinafter, similarly, the reset operation of the latching relay is sequentially performed up to the last control line y based on the set delay time.

FIG. 11 is a time chart showing the recovery operation in the control repeater shown in FIG.
And the two control repeaters at address n + 1 form a group corresponding to the restoration command of group 1. The control repeater at address n sets the delay time shown in FIG. The control repeater at address n + 1 has eight lines and the delay time shown in FIG. 10B is set as an example.

First, the time t from the receiver 10₁ First guru in
If a recovery command for the loop address is sent,
After that, when there is a delay according to the group address shown in FIG.
Interval T _Two , T_Three ,... Every time Tx elapses
You. Recovery frame of the first group address 1 from the receiver
For example, an address n belonging to group 1
And the batch recovery command is issued by the control repeater at address n + 1.
The decryption is performed, and a recovery operation of the control load is performed.

The control repeater of the address n is controlled by four lines.
Since a load is connected, ΔT ₁ 1 line every hour
Reset operation of latching relay from line to line 4
Do. On the other hand, the control
Because there are eight lines, half the address n
ΔT_Two Latching relay from line 1 to line 8 every time
The reset operation is performed sequentially.

Therefore, the reset operation of the two latching relays is performed at the same time, and the current flowing through the receiver between time t ₂ and time t until the restoration command of the next group address 2 is obtained is _equal to the steady current It. It becomes twice the current obtained by adding a latching relay reset current I _r, the maximum output current commensurate with available power capacity of the flow from the receiver 10 I
It is kept so as not to exceed _max .

Similarly, for the group addresses 2 to x, two grouped control repeaters are designated by the group address, and the designated control repeaters perform a collective recovery operation for each line. Next, another embodiment of the control load batch recovery process according to the present invention will be described. In the above embodiment, a case where batch recovery of the control load is performed collectively and sequentially for each of the grouped repeaters and for each of the control lines drawn from the repeaters in the group is taken as an example. However, in addition to this, the recovery processing based on the collective recovery command of the present invention may be collective recovery for each repeater, and the total amount of current flowing when the reset winding of the latching relay is energized by one recovery is used as the receiver 10. The number of control loads to be collectively restored within a range not exceeding the allowable maximum output current from the control load can be appropriately determined.

Specifically, in the flowchart showing the processing operation of the repeater shown in FIG. 9, after the signal is received in step S2, processing for first determining the command field in the received signal is added, and collective recovery from the command field is performed. When the command is decoded, the process immediately proceeds to the processing in steps S8 to S10 without performing the address comparison in step S3.

In the above embodiment, the case where only the receiver 10 is provided as the receiving means is taken as an example. However, when the equipment scale is further increased, the receiver installed in the central monitoring room is transmitted via the transmission line. For example, a relay board is installed as a local receiver for each floor, and control repeaters 20-1 and 20-2 are connected to each of the relay boards via the transmission line 12 as shown in the receiver 10 of FIG. Configuration.

Therefore, in the case of such a large-scale system, the receiving means includes a receiver and a relay board as a local receiver. Further, in a facility configuration in which the main receiver controlling the local receiver is not provided and only the local receiver is distributed for each floor and each functions as a receiver, the term of the present invention is used. Can be constituted only by the local receiver.

[0052]

As described above, according to the present invention, all terminals or a plurality of terminals are collectively restored within a range where the current from the receiver does not become excessively large. Recovery can be done in a short time,
The time period during which the control CPU on the receiving side is busy for the recovery processing is reduced, and appropriate fire monitoring can be performed with restraint by the recovery processing being minimized.

[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 circuit block diagram showing an embodiment of a repeater for terminal control according to the present invention.

FIG. 4 is an explanatory diagram showing a transmission operation between a receiver and a repeater according to the present invention.

FIG. 5 is an explanatory diagram of a message format from the receiver of the present invention.

FIG. 6 is an explanatory diagram of a message format from the repeater of the present invention.

FIG. 7 is a flowchart showing the processing operation of the receiver of the present invention.

FIG. 8 is an explanatory diagram showing an example of a delay time set in the repeater of the present invention.

FIG. 9 is a flowchart showing the processing operation of the repeater of the present invention.

FIG. 10 is an explanatory diagram of a unique time table used for a restoration process for each repeater;

FIG. 11 is a time chart showing a terminal recovery operation according to the present invention.

[Explanation of symbols]

 1: Receiving means 2: Terminal 3: Restoration command means 4: Restoring means 10: Receiver 12: Transmission line 14: Signal line 15: Power supply line 16: Detector repeater 18: Analog sensor 20, 20-1, 20 -2: control repeater 22: power / signal line 24: on / off fire detector 26: control load 28: control unit 30: display unit 32: operation unit 34: recovery switch 36: sounding unit 38: power supply unit 40: constant Voltage circuit 42: Transmission / reception circuit 44: Transmission indicator light 46: Control circuit 48: Address setting circuit 50: Address setting switch 52: Delay time setting circuit 54: Relay drive circuit 56-1 to 56-4: Latching relay 58: Power supply line Mask circuit 60: Smoothing circuit 62: Voltage monitoring circuit 64-1 to 64-4: Load connection circuit 66-1: Relay contact 68-1: Confirmation detection circuit 70: Solenoid Yl 72: Tampa switch 74: jumper lines

Continuation of the front page (56) References JP-A-61-177047 (JP, A) JP-A-1-159798 (JP, A) JP-A-62-37390 (JP, U)

Claims (6)

(57) [Claims] 1. A disaster prevention apparatus which sends a command signal specifying a terminal address from a receiving means to a terminal, and performs load drive control or recovery control based on the command signal received by the terminal having its own address matching the terminal address. In the monitoring device, the receiving unit includes a restoration command unit that sends a collective restoration command signal for collectively restoring the plurality of terminals, wherein the terminal is a relay connected to a signal line from the receiving unit.
And connected to one or more control lines from the repeater
A control load, and when the repeater receives a batch recovery command signal from the recovery command means ,
Determine the control load connected in advance for each control line.
Disaster prevention monitoring device characterized by comprising recovery means for sequentially recovering at a specific time interval . 2. The disaster prevention monitoring device according to claim 1, wherein the restoration command unit of the receiving unit sequentially issues a batch restoration command by designating a group address in which a plurality of terminals are grouped . Wherein the recovery means recovers the control load connected to the repeater when receiving a batch recovery command signal designating a group address to which the self belongs to from the reception means. 3. The disaster prevention monitoring device according to claim 1 , wherein the relay drives the control load by energizing a set winding of a latching relay. A disaster prevention monitoring device, wherein the control load is restored by energizing a reset winding of the latching relay. 4. In the disaster prevention monitoring system according to claim 1 to 3, wherein said receiving means is constituted only by the receiver, disaster prevention monitoring apparatus characterized by connecting the terminal to the receiver. 5. In the disaster prevention monitoring system according to claim 1 to 3, wherein said receiving means includes a receiver, one or more repeater panels as a local receiver connected to the transmission path from the receiver Wherein the terminal is connected to each of the relay boards. 6. In disaster prevention monitoring system according to claim 1 to 3, wherein said receiving means comprises mutually only repeater panels as a plurality of local receivers connected by a transmission path in the, each said repeater panels A disaster prevention monitoring device, wherein the terminal is connected to the terminal.