JPH02310699A - Disaster prevention system - Google Patents

Abstract

PURPOSE:To detect the occurrence of a fire in its early stage, and to expand the scale of a system by transmitting a multiplex transmission signal for calling a sensor connected to the line of a repeater and making it return sense information as an answer signal. CONSTITUTION:The multiplex transmission signal is the multiplex transmission signal corresponding to the sensor 4,5 connected to the repeater 131, and the sensor 4,5 receiving the multiplex transmission signal whose address data coincides with a set address returns the eense information as an answer signal to a receiver 1 through a line (l), transmission circuits 18,17 and a transmission line L. Thus, it is unnecessary to install another multiplex transmitting means in the repeater for transmitting the multiplex transmission signal to the connected line, and the cost of the system becomes inexpensive, and the occurrence of a fire can be detected in its early stage, and the scale of the system can be expanded.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a disaster prevention system that monitors occurrences of fires, gas leaks, and the like.

[Prior Art] Recent fire detectors (hereinafter referred to as detectors) have come to handle analog data, and therefore send and receive data to and from receivers using time-division multiplexed transmission signals. Disaster prevention systems have been provided.

Figure 4 shows a disaster prevention system using a general so-called R-type receiver 1, and this disaster prevention system sequentially calls repeaters 2 pins connected to the transmission line by multiplexed transmission signals from the receiver 1. , repeater 2. Receiver 1 receives sensing information from on-off type sensor 3 and analog type sensor connected to...
Each repeater 21... is set with an address that can be called individually from the receiver 1. In addition, the disaster prevention system shown in FIG.
A point address type sensor 5, a gas leak relay 6, a relay 7 for controlling disaster prevention equipment, etc. are connected, and a relay 2 connected to an on-off type sensor 3 is connected to the receiver 1.
Each repeater 2.6.7 and sensor 4.5 is sequentially called up by a multiplexed transmission signal and sent back analog data, sensing information consisting of on/off operation data, gas leak detection information, etc.

[Problem to be solved by the invention] By the way, in the disaster prevention system shown in FIG. 4, each repeater 21...
It is necessary to connect the sensor 3 to each of the sensors individually, and there is a problem in that the wiring becomes complicated when a large number of sensors are used.

Furthermore, in the disaster prevention system shown in Fig. 5, the allocation of addresses called from receiver 1 is consumed by sensors 4.5, which have a large number of installed sensors, and the number of other types of repeaters 2, 6, 7, etc. to be connected is reduced. There was a problem with putting it away.

In view of these problems, a distributed processing type disaster prevention system shown in FIG. 6 has been proposed. . . via a line l, a sensor such as an analog type sensor 4 with an address or a point address type sensor 5 is connected to a relay 8. The sensors 4, 5, . . . are called by a multiplex transmission signal transmitted from .
. . , and at the same time each repeater 8 connected to the receiver 1 via a transmission line. . . . are sequentially called by a multiplexed transmission signal from the receiver 1, and the repeater 81 . ing. Figure 7 is the 6th
The figure shows the configuration of a repeater 8 used in the illustrated disaster prevention system, which includes a transmission control unit 9 that receives multiplex transmission signals and transmits a reply signal with the receiver 1 through a transmission line;
Transmit multiplex transmission signals to sensors 4 and 5 through line l,
A transmission control unit 1o receives and processes the return signal from the sensor 4.5, and a transmission control unit 1o makes an alarm determination based on the sensing information received as a return signal from the sensor 4.5. A calculation unit 11 has a signal calculation processing function that returns alarm information as a reply signal in response to a call, and a calculation unit 11 that stores alarm information, stores sensing information that is monitoring data, and monitors a sensor. and a storage section 12 that stores polling data for.

By the way, in the disaster prevention system shown in Fig. 6, the multiplex transmission system as a transmission line and the multiplex transmission system on line 1 must be installed separately. There is a problem that the timing of detecting a fire alarm at 1.1 is delayed, and repeater 8. ...and sensors 4, 5...
It is necessary to have its own polling data for monitoring the receiver 1, and therefore it is necessary to transmit the polling data from the receiver 1 or to store it by another means.

The present invention has been made in view of the above-mentioned problems, and its purpose is to increase the scale of the system using the same multiplex transmission method, and to provide a sensor connected to the line inside the repeater. A disaster prevention system that can be easily configured without the need to have a transmission control unit for the equipment, and can quickly collect information at the receiver for the sensor connected to the line, allowing for early detection of abnormalities such as fire outbreaks. It is on offer.

[Means for solving the problem] The present invention connects a repeater with an individual address set to a receiver using a transmission line, calls the repeater with a multiplexed transmission signal from the receiver, and connects the repeater to the repeater. Control disaster prevention equipment,
In a disaster prevention system that performs monitoring and control by sending sensing information such as fire detection back to a receiver, the system is controlled by multiplex transmission signals from the receiver, individual addresses are set, and the system is controlled by multiplex transmission signals from the receiver. The apparatus is equipped with a repeater having a transmission means for relaying a multiplex transmission signal from the receiver and a reply signal from the sensor between the line connected to the sensor and the transmission line.

[Operation] According to the present invention, the sensor connected to the line of the repeater is called and the sensing information is sent back as a reply signal between the time when the transmission means is activated and the time when the operation is stopped. By transmitting a multiplex transmission signal from the receiver to transmit the multiplex transmission signal to the connected line, there is no need to provide a separate multiplex transmission means inside the repeater to transmit the multiplex transmission signal to the connected line.
The sensor can be monitored from the receiver. In addition, since it is only a signal relay, there is no time delay in receiving the sensing information of the sensor as a reply signal at the receiver, allowing early detection of a fire outbreak, and polling of the sensor connected to the repeater line. Even if this is done, the multiplex transmission signal will not be transmitted to the sensors connected to the lines of other repeaters unless the transmission means is in operation, so overlapping addresses are allowed and the system scale can be increased. be.

Examples] The present invention will be explained below with reference to Examples.

FIG. 1 shows a configuration diagram of an embodiment of the present invention, in which various repeaters are connected to a receiver 1 via transmission lines. In addition to the conventional repeater 2, these repeaters also have line l
A repeater 13 to which an analog type sensor 4 or a point address type sensor 5 is connected via. ...Ya, gas sensor 6
There is a gas leakage relay 6 connected to a, a monitoring relay 14 that takes in input from other monitoring contacts 14a, and a control relay 7 for controlling smoke prevention equipment 15, etc. A separate address has been set.

When the repeater 2.6.7.14... receives the multiplex transmission signal from the receiver 1, and its own preset address matches the address data AD transmitted by the multiplex transmission signal. For example, in the case of the gas leak repeater 6, the monitoring information based on the gas detection data of the gas sensor 6a is sent back as a reply signal RD, and the monitoring repeater 14 If there is, the input of the monitoring contact °14a is returned as a reply signal RD, and if it is the control repeater 7, it controls, for example, the smoke prevention equipment 15 based on the control data CD.

FIG. 2 shows the format of the multiplex transmission signal transmitted from the receiver 1, which is composed of a start signal ST, the address data AD, control data CD, and a reply waiting period RT for sending a reply signal RD. , a reply signal is sent back to the receiver 1 during the reply waiting period RT. This multiplexed transmission signal from the receiver 1 is transmitted as a baseband signal superimposed on the DC voltage supplied from the receiver 1 to the repeaters 2, 6゜7.14.13+, etc. via a transmission line, for example. be done.

As shown in FIG. 1, the repeaters 13+, 132, .
and an arithmetic unit 19 that reads data of multiplexed transmission signals transmitted from and controls the transmission circuits 17 and 18,
The transmission circuit 17 separates the multiplexed transmission signal superimposed on the DC voltage applied to the transmission line from the DC voltage and sends it to the calculation unit 19.
At the same time, it is sent to the transmission circuit 18 as a unipolar baseband signal under the control of the arithmetic unit 19, and through the transmission circuit 18, the reply signal RD from the line l is superimposed on the DC voltage of the transmission line during the reply waiting period RT. It has the function of

Furthermore, the transmission circuit 18 is controlled by the transmission circuit 1 under the control of the calculation section 19.
The multiplexed transmission signal is driven by a multiplexed transmission signal of the baseband signal input through 7, and is relayed to the line 1 as, for example, a unipolar baseband signal.
Alternatively, it is constituted by an insulated signal relay means, such as a bidirectional photocoupler, which has a function of sending a reply signal returned from 5 to the transmission circuit 17.

The analog sensor 4 includes a sensor unit 4a that detects smoke and temperature, an A/D converter 4b that converts analog data from the sensor unit 4a, an address setting unit 4C, and a line l.
The above multiplex transmission signal is received and the address data AD of the multiplex transmission signal is compared with the set address of the address setting section 4C. If they match, the analog signal from the sensor section 4a converted into a digital signal by the A/D conversion section 4b is output. Data return signal RD
The transmission circuit 4d sends a reply at the timing of the reply waiting period RT, and the operating power source rectifies and smoothes the unipolar baseband multiplex transmission signal transmitted on the line l.

The point address type sensors are different from the analog type sensor 4 in that they are equipped with an on/off information detector section and the sensing information sent back as the reply signal RD is the on/off information of the sensor section. Similarly, individual addresses are set.

When monitoring the sensors 4 and 5 connected to the line 1 of the repeater 131 from all receivers 1, multiplex transmission corresponding to the address of the repeater 131 is performed as shown in FIG. 3(a). Transmit signal AI twice. In other words, the first multiplex transmission signal A1
At repeater 13. The repeater 1 sends control data CD to turn on the transmission circuit 18 of
31, the next multiplexed transmission signal A is generated under the control of the arithmetic unit 16.

The multiplexed transmission signal following the line through transmission circuits 17 and 18! It is relayed to the top. Therefore the line! A multiplexed transmission signal is also transmitted above as shown in FIG. 3(b).

Now, the repeater 13 that has received the next multiplex transmission signal A sends back the operation monitoring information of the transmission circuits 17 and 18 as a reply signal RD, but this multiplex transmission signal A1 is transmitted to the sensor 4 connected to the line l. For .5, it becomes a dummy multiplexed transmission signal.

Furthermore, the multiplexed transmission signal A and subsequent RI, R2, and R5 are transmitted through a monitoring repeater 14 to which on-off type sensors are individually connected, for example.
. . . These multiple transmission signals R+, R2, Rs are used to sequentially call the monitoring repeaters 14 . . . connected to the transmission line and return the monitoring information to the receiver 1. let At this time! Sensor 4 connected to l
, 5, the multiplex transmission signals R, ,R2,R, become dummy multiplex transmission signals. The reception period of these dummy multiplex transmission signals is a period for securing the time required to reset the power supply of the circuit of the sensor 4.5 connected to the line 1 and the time until the circuit operating voltage is reached.

Now, the next multiplex transmission signals AD, , AD2 . AD is a multiplex transmission signal corresponding to the sensor 4.5 connected to the repeater 131, and therefore the multiplex transmission signals AD+, AD z , whose address data AD matches the set address are
The sensor 4.5 that received A D 3 sends the sensed information as a reply signal RD and connects the line! , the transmission circuits 18 and 17, and the transmission line can be sent back to the receiver 1.

When the polling of the sensors 4 and 5 is completed in this way, the receiver 1 transmits the multiplex transmission signal A corresponding to the repeater 131... to the transmission circuit 1 of the repeater 13I.
8 to turn off the relay to line l.

After this turning off, the multiplexed transmission signal is not transmitted to the line 1 as shown by diagonal lines in FIG. 3(b), and the line 1 is in a dormant state. Even in this dormant state, multiplex transmission signals are transmitted from the receiver 1 in the order of G, G, G3, and the corresponding gas leak repeaters 6, etc. are sequentially called and the monitoring information is transferred to the receiver. Reply to 1.

After that, for example, the repeater 13□ corresponding to the multiplex transmission signal A2 is called, and the multiplex transmission signal is relayed to the line l connected to the repeater 132 in the same manner as described above, and the connection to the line l is detected. By polling the sensor 4.5, the receiver 1 can monitor the sensor 4.5 in the same way as described above.

Repeater 2゜6.7 connected to the transmission line in this way
, 14, 13. . . and polls the sensor 4.5 connected to the line P of the repeater 131.13□. ．． 13□... and monitors and controls the repeaters 131, 132... ．． The sensors 4.5 connected to 13□... can be monitored. In this case, for example, the repeater 13.A corresponds to the multiplexed transmission signal. ．． The address of the sensor 4.5 connected to the line I of 132... overlaps with the address of the sensors 4, 5 connected to the line I of the repeater 13° corresponding to another multiplexed transmission signal of A2. Even if the sensors 4 and 5 are connected to each other, there will be no address conflict and each sensor 4.5 can be monitored.

[Effects of the Invention] The present invention connects a repeater with an individual address set to a receiver via a transmission line, calls the repeater with a multiplex transmission signal from the receiver, and controls disaster prevention equipment connected to the repeater. or
In a disaster prevention system that performs monitoring and control by sending monitoring information from gas sensors, etc. back to the receiver, sensors connected to individual addresses are set and controlled by multiplex transmission signals from the receiver. The device is equipped with a repeater having a transmission means for relaying the multiplexed transmission signal from the receiver and the reply signal from the sensor between the line and the transmission line, and the transmission means is operated and then Until the operation is stopped, the receiver transmits a multiplex transmission signal to call the sensor connected to the line of the repeater and send back sensing information as a reply signal.
There is no need to provide a separate multiplex transmission means inside the repeater to transmit the multiplexed transmission signals to the connected line, and it is only necessary to provide a transmission means to relay the multiplexed transmission signals, so the system cost is low, and the receiving The detector can be directly monitored from the machine, so there is no time delay in receiving the sensor's sensing information as a reply signal at the receiver, allowing for early detection of a fire outbreak, and connecting to the repeater line. Even if polling is performed on the sensors connected to the Virtue Repeater line, multiplex transmission signals will not be transmitted to the sensors connected to the Virtue Repeater line unless the transmission means is in operation. It has the effect of being able to be made larger.

[Brief explanation of the drawing]

FIG. 1 is a system configuration diagram of an embodiment of the present invention, FIG. 2 is a format of a multiplexed transmission signal as described above, FIG. 3 is a time chart for explaining the operation of the same as described above, and FIG. 4 is a system configuration diagram of a conventional example. Section 5 is a system configuration diagram of another conventional example, FIG. 6 is a system configuration diagram of another conventional example, and FIG. 7 is a circuit configuration diagram of the same repeater. 1 is a receiver, 4 and 5 are sensors, 131 and 132 are repeaters, 16 is an address setting section, 17.18 is a transmission circuit, 19
is an arithmetic unit, L is a transmission line, and i is a line. Agent Patent Attorney Ishi 1) Chief 7 Figure 2 Figure 3 (0) AI At F? + Rz
Shakus ADI AD2AD! AI (xI G2
B+ A2(b) AI PI R2R3,
ADI (Figure 4, Figure 5, Figure 6 Procedural amendments voluntarily written) July 28, 1999

Claims (1)

[Claims] (1) Connect a repeater with an individual address and a receiver using a transmission line, and call the repeater with multiplex transmission signals from the receiver to control disaster prevention equipment connected to the repeater or In a disaster prevention system that performs monitoring and control by sending back sensing information such as a repeater having transmission means for relaying multiplex transmission signals from the receiver and return signals from the sensor; A disaster prevention system characterized in that a receiver transmits a multiplex transmission signal for calling a sensor connected to a sensor and sending back sensing information as a reply signal.