JPH05307694A - Alarm slave station substituting control method - Google Patents

Abstract

PURPOSE:To provide an alarm slave station substituting control method which allows a slave station to control an alarming system instead of a master station even when the master station stops warning/controlling the rising of a river to people along the lower reaches of the river particularly at the time of discharging a dam installed at the river concerning the alarming system. CONSTITUTION:When the master station 1 which individually and successively emits alarms to plural slave stations 2 to 4 by employing an alarming signal which can simultaneously be received by the plural slave stations 2 to 4 transmits the alarming signal 5 to at least a first slave station 2, it monitors the normal completion of the alarming signal for the slave stations 3 and 4 followed from the master station 1 by employing following slave station information included in the alarm signal 5. Then, at the time of judging the generation of abnormality (shown with a dotted line in a figure) at the master station 1 due to the monitoring, the first slave station 2 successively and individually transmits alarming control signals 7 and 9 to the following slave stations 3 and 4 after the abnormality generation in accordance with the following slave station information included in the alarming signal 5 instead of the master station 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an alarm system, and in particular, one master station and a master station for issuing a warning of river flooding to people in the downstream region when releasing water from a dam installed in a river. The present invention relates to an alarm system composed of a plurality of slave stations controlled by.

[0002]

2. Description of the Related Art A discharge warning system, when discharging from a dam installed in a river, prior to the start of the discharge,
In the future, it is intended to warn people in the downstream area that the river will increase due to discharge. This system consists of one master station installed in the dam and multiple slave stations installed in the downstream area of the dam. Since each station is far away from each other, a wireless line is used to issue an alarm control signal from the master station to the slave station and report the control result from the slave station to the master station. This system is a master station-led system, and a method similar to so-called polling (sequentially called slave station control) is used for signal transmission between the master station and each slave station, and the master station controls all slave stations. It manages, and sequentially repeats one-to-one from the control start to the confirmation of the control result for each slave station.

FIG. 7 schematically shows an example of an alarm control method for the above-mentioned conventional alarm system. In the figure,
The parent station 11 issues an alarm to each of the child stations 12 to 14 in the downstream region when starting the discharge of the dam installed upstream of the river. The slave station A12, the slave station B13, and the slave station C14 are installed at predetermined intervals downstream of the river, and the operation of an alarm device installed therein, such as siren blowing, rotating lamp lighting, and display board lighting, is performed. It controls and alerts downstream people to flooding of rivers.

The alarm control signal 15 from the master station 11 when the water discharge is started is first sent to the slave station A12 closest to the master station 11 by using a wireless line. The alarm control signal includes a slave station number (here, A) and its control item. The alarm control signal 15 is sent out after a predetermined time has elapsed (generally, several minutes to 10 minutes) from the water discharge in consideration of the time it takes for the water level of the river to reach the slave station A12 due to the dam discharge. To be done. When the slave station A12 receives the signal, the slave station A12 sends a control result confirmation signal 16 to the master station according to the control item, for example, after sounding a siren. When the master station 11 receives the control result confirmation signal 16, it performs the same control as that of the slave station A12 on the slave station B13 located downstream of the slave station A12, and when it finishes, The control is sequentially repeated to the downstream slave station C14, and the control is finally ended.

FIG. 8 shows a conventional master station 11 and slave stations 12-1.
The block configuration of each station including 4 is shown. In the figure, the master station 11 sends the alarm control signal 15 to the slave station A12 by using a wireless signal from the transmission wireless device 18 in accordance with data and instructions from the internal slave station controller 19. The slave station A12 receives the signal 1 by the reception radio 22.
5, the reception code determining unit 23 receives the slave station number. (Here is slave station A) and alarm items (here alarm operation starts)
Etc. are decoded and the alarm warning device 24 in the next stage is driven. The alarm issuing device 24 is composed of the above-mentioned siren blowing device, rotating lamp, display panel, etc., and performs siren blowing, lighting, etc. by the drive. Next, the alarm control result determination unit 25 confirms the normal operation of the alarm generation device 24. Based on the confirmation result, the transmitter control unit 26 and the alarm control result transmission unit 27
In the above, the control result confirmation signal 16 described above is created, and the transmission wireless device 21 is used to report the control result confirmation of the slave station A12 to the master station 16.

When the master station 11 receives the control result confirmation signal 16 at the receiving radio device 17, the reception code judging section 20 determines that the slave station No. (Here, the slave station A) and the report contents (for example, normal end) are decoded. If the content of the report is normal, the slave station controller 19 confirms the end of the control sequence for the slave station A12, and starts the same control as described above for the next slave station B13. If the report content is abnormally terminated, the operator or the display unit of the parent station is notified or displayed.

[0007]

However, in the conventional method of sequentially controlling the slave stations from the master station as in the conventional case, when the master station 11 is stopped due to an accident such as a power failure or a failure during the alarm control described above, the subsequent Since the alarm control signal is not sent to each slave station, there is a possibility that a warning such as siren blow cannot be issued and a serious accident may occur. Therefore, it is conceivable to duplicate the device including the master station and the slave station, but this cannot solve the problem such as cost. In addition, this alarm system is not completely automated because it is related to human life due to the increase in water in the river, and the master station 11 always has an operator or a supervisor to instruct the start of alarm control operation, and each child thereafter. Monitoring reports from stations 12, 13, and 14.
If the above-mentioned abnormality occurs in the master station 11, the operator or the like rushes to the slave station and manually monitors the alarm operation of each slave station.

Therefore, in the present invention, even when the master station system sequentially controls the slave stations and is unable to control the slave stations due to an accident, the subsequent control is delegated to the slave station closest to the master station. It is intended to provide an alarm slave station proxy control method capable of reliably and continuously controlling each succeeding slave station control. This makes it possible to back up the operation by using the hardware of the slave station without duplicating the hardware of the master station. Furthermore, as mentioned above, the operator etc. can easily rush to perform the above monitoring within the slave station. Can be done in.

Further, according to the present invention, when the alarm proxy control for each succeeding slave station becomes impossible due to an accident or the like even in the first slave station, the proxy control is transferred to the next normal slave station. An alarm slave station proxy control method that sequentially switches is provided. As a result, similarly to the above, without duplicating the hardware of the slave station, the operator or the like can also rush, and the above monitoring can be performed in the nearest slave station.

[0010]

According to the present invention, as shown in principle in FIG. 1, a plurality of slave stations 2 to 4 are simultaneously received by using an alarm signal which can be received simultaneously by the plurality of slave stations 2 to 4. The master station 1 that sequentially issues the alarms to the plurality of slave stations 2 to 2
4, the first step of sending said alarm signal 5 to at least the first slave station 2, said first slave station 2 using the subsequent slave station information contained in said received warning signal 5,
Subsequent slave stations 3, which are transmitted from the master station 1 and include information on each slave station 3,
The second step of monitoring the normal termination of the alarm signal for 4; when it is judged from the monitoring that an abnormality (indicated by a dotted line in the figure) has occurred in the parent station, the first child station 2 In place of the above, the third step of sequentially issuing an alarm 7, 9 to each of the subsequent slave stations 3 and 4 after the occurrence of the abnormality in accordance with the subsequent slave station information included in the alarm signal. An alarm slave station proxy control method for an alarm system comprising a master station 1 and a plurality of slave stations 2 to 4 is provided.

According to the present invention, the master station 1 sequentially issues an alarm to each of the slave stations 2 to 4 by using an alarm signal that can be received by the slave stations 2 to 4 simultaneously. A second step of monitoring the normal termination of the alarm signal transmitted from the master station 1 and including each slave station information; When it is determined that an abnormality has occurred and the slave station to be alarm-controlled does not start the control operation before the own station, the slave station that has made the determination is included in the alarm signal received before the determination. From a master station and a plurality of slave stations, which comprises a third step of sequentially issuing an alarm to each of the slave stations after the occurrence of the abnormality individually on behalf of the master station 1 and the slave stations according to the subsequent slave station information. An alarm slave station proxy control method for an alarm system is provided.

[0012]

According to the former method, the master station 1 starts the alarm control operation in response to an instruction from the operator or the like, and first uses a wireless line or the like for each slave station 2-4 to allow simultaneous reception by each slave station. Alarm control signal 5 to slave station A2 located closest to master station 1
Is sent. In the alarm signal, control items of the succeeding slave stations 3 and 4, for example, the control order of the succeeding slave stations (for example, slave station 3-> slave station 4 etc.) and control waiting time between each slave station (for example, about 10 minutes etc.) ) Is also included. The slave station A2 which has received the alarm control signal 5 is transmitted from the master station 1 to the next slave station B based on the received information.
Monitor the sending of the alarm control signal to 3.

However, if the system of the master station 1 goes down during this period, the alarm control signal is not output even if the predetermined waiting time is reached, and the slave station A2 which has detected this will replace the master station 1 and operate according to the control item. The alarm control signal 7 is sent to the station B3. When the control result confirmation signal 8 is received from the slave station B3, the slave station A2 then receives the control result confirmation signal 8 and the slave station C4 follows the control item.
The same control is performed for. In this way, the slave station A2 acts on behalf of the master station 1 and continues to control each subsequent slave station.

According to the latter method, all the slave stations B3 and C4 have the same function of the slave station A2 described above. If the master station is down, and the slave station to be controlled before the own station does not start the proxy control of the master station 1 even after the predetermined time included in the control item, the slave station is The proxy control is started from the slave station that is not yet under alarm control. In this case, not only the master station 1 but also the system down of the upper slave station can be dealt with, and the alarm control operation is normally completed. Further, the slave station closest to the master station 1 that normally operates is automatically selected.

[0015]

FIG. 2 shows an embodiment of the system configuration according to the present invention shown in FIG. The same components as those in FIG. 1 are designated by the same reference numerals and will not be described again here. In the figure, the discharge alarm device 1 of the master station is provided with a power supply device 35, an operator console 33 for issuing an alarm start instruction or the like to the slave station by the above-mentioned operator or monitor,
Then, the printer 34 or another device 32 such as a display for issuing a control result report from the slave station is connected. The slave station A2 closest to the master station 1 also has the function of the proxy alarm control station according to the present invention, and performs siren sounding as a warning means in the figure. Child station B3 and child station C
Reference numeral 4 is the same as the conventional slave station (FIG. 8) using a rotating light and a display board as alarm means.

FIG. 3 is a block diagram showing an example of the constitution of the proxy alarm control station according to the present invention. In the example of FIG. 2, the above-mentioned slave station A has this constitution. In the figure, reference numerals 21 to 27 are the same as those of the slave station of FIG. 8 already described, and therefore will not be described again here. The wireless alarm control signal from the master station 1 is received by the receiving wireless device 22. The received signal is subjected to the conventional code decoding in the received code judging section 23, and the data of the information section described later contained in the received signal is temporarily stored in the control result storing section 28.

FIG. 4 shows an example of the signal format of the alarm control signal according to the present invention transmitted / received between the master station 1 and the slave stations 2-4. This is the so-called format H
It is used for transparent data transfer such as flag F (01111110), zero insertion / deletion, and CRC check using DLC (High level Data Link Control). In the address section [A], the slave station No. for alarm control is set. For example, A is described, and the control section [C] describes the control item of the slave station designated by the address, for example, start of alarm operation. In the conventional system shown in FIG. 8, the alarm signal format is composed of only the above-mentioned components, the information section [I] is not used, and the slave station A only performs the alarm control in its own station with only the address and the control item. It was

However, the present invention makes effective use of the information section [I] as shown in FIG. For example, the delay time B for controlling the station B and the station B (the time corresponding to the arrival time of the water in the river to the station A-> the station B) are written. Then C and the delay time C are written. And
When there is no subsequent slave station thereafter, the information section [I] is terminated by an end code, for example, FFH.

Returning to FIG. 3 again, the reception code judging section 23
If the address part [A] of the alarm control signal received in step 1 is deciphered to its own station, for example, A, processing 2 as in the conventional case
4 to 27 are performed, the time monitoring processing unit 29 passes through the result, and the control result confirmation signal is transmitted from the transmission wireless device 21 to the master station 1. After that, when the alarm control signal is not output from the master station 1 to the succeeding slave station, for example, B due to the system down of the master station 1, the time monitoring processing unit 29 causes the next station No. ． The slave station control unit 30 is driven after the delay time B by using the data of B and the delay time B. The slave station control unit 30 creates an alarm control signal for the slave station B in the same manner as the slave station control unit 19 of the master station shown in FIG. 8. The alarm control signal is buffered in the temporary control information storage unit 31 and then transmitted to the transmitting radio unit 21. Sends an alarm control signal to the slave station B. After that, the slave station A acts as the proxy control station, and includes the reception wireless device 22, the reception code determination unit 23, the control result storage unit 28, the time monitoring processing unit 29, the slave station control unit 30, the control information storage unit 31, and the transmission wireless device 21. In this loop, the same control as the master station 11 shown in FIG. 8 is executed. It should be noted that blocks 28 to 31 and the like newly added to FIG. 8 can be easily dealt with by simple software change of the slave station.

FIG. 5 schematically shows a control sequence when the alarm control between the master station and the slave station is normally performed. In the figure, for example, the description of [A BC ] representing the alarm control signal from the master station to the slave station is that A is written in the address section [A] and BC is written in the information section [I] in FIG. Indicates. In (a) of the figure, the master station sends an alarm control signal [A BC ] to the slave station A, instructs the slave station A to perform alarm control, and the succeeding slave stations B and C. Inform that there is. The slave station A reports the normal end of the control result ((b) in the figure). Next, in (c) of the figure, the master station sends an alarm control signal [ BC ] to the slave station B, instructs the slave station B to perform alarm control, and the succeeding slave station is C. Let us know. The slave station B reports the normal end of the control result ((d) in the figure). Similarly, the master station sends an alarm control signal [C] to the last slave station C, instructs the slave station C to perform alarm control ((e) in the figure), and the normal operation from the slave station C is performed. Upon receiving the end report ((f) in the figure), the control is ended.

FIG. 6 schematically shows a control sequence when the master station is stopped during alarm control. The description of (a) and (b) of FIG. 6 is the same as that of (a) and (b) of FIG. At this time, cases where the master station is stopped due to system down or the like are illustrated in FIGS. 6 (c) to 6 (f). The slave station A knows from the alarm control signal [A BC ] in (a) of the figure that the succeeding slave stations are B and C. Further, as explained in FIG. Knowing that, if the alarm control signal [ BC ] is not output from the master station to the slave station B within that time, the slave station A judges that an abnormality has occurred in the master station and the proxy master Becomes a station (indicated by a black circle) and outputs the alarm control signal [B C ] shown in FIG.
Send to. After that, the procedure is the same as that of (d) to (f) of FIG. 5 except that the master station is replaced by the slave station A and will not be described here.

Although not shown in the figure, according to the present invention, for example, the slave stations A to E exist, and the slave stations A to C are stopped when the alarm control is normally performed. if you did this,
The slave station A acts as a proxy alarm control station and alarm-controls the slave station D. At that time, when the slave station A further stops, the slave station C acts as a proxy master station to continue the alarm control of the slave station D, and finally the alarm control of all the slave stations A to E is completed. In this case, the proxy alarm control station is sequentially selected from the normal slave station closest to the master station. In this example, not only the slave station A but also all the succeeding slave stations B to E require the slave station configuration having the proxy control function shown in FIG.

[0023]

As described above, according to the present invention, even if the master station system stops sequentially while controlling the slave stations and cannot control the slave stations, the subsequent control is closest to the master station. The slave station acts as a proxy, and each subsequent slave station control can be reliably performed. Further, according to the present invention, it becomes possible to back up the master station by utilizing the hardware of the slave station without duplicating the hardware of the master station. Further, even when the above-mentioned abnormality occurs, the normal slave station closest to the master station sequentially performs proxy control, so that an operator or a supervisor can easily rush to monitor the slave station operation during alarm control. It will be possible.

[Brief description of drawings]

FIG. 1 is a diagram schematically showing the basic principle of an alarm slave station proxy control method according to the present invention.

FIG. 2 is a diagram schematically showing an embodiment of a system configuration according to the present invention.

FIG. 3 is a block diagram showing a configuration example of a proxy alarm control station according to the present invention.

FIG. 4 is a diagram showing an example of a signal format of an alarm control signal according to the present invention.

FIG. 5 is a control flow diagram that schematically shows an example of an alarm control sequence during normal operation.

FIG. 6 is a control flow diagram schematically showing an example of proxy control by a slave station when the master station stops during alarm control.

FIG. 7 is a diagram schematically showing an alarm control example of a conventional alarm system.

FIG. 8 is a diagram schematically showing a block configuration example of a conventional master station and a slave station.

[Explanation of symbols]

 1 ... Parent station 2 ... Proxy alarm control slave station 3, 4 ... Slave station 4 ... Call setting means 5, 7, 9 ... Alarm control signal 6, 8, 10 ... Control result confirmation signal

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Kenichiro Watanabe 3-9-18 Shin-Yokohama, Kohoku-ku, Yokohama-shi, Kanagawa Fujitsu Communication Systems Limited

Claims (2)

[Claims] 1. A master station for individually and sequentially issuing alarms to a plurality of slave stations by using an alarm signal that can be received simultaneously by a plurality of slave stations is at least the first slave station of the plurality of slave stations. A first step of transmitting the alarm signal to the first slave station, the first slave station using the subsequent slave station information included in the received alarm signal, the subsequent slave station including each slave station information transmitted from the master station. The second step of monitoring the normal termination of the alarm signal to the slave station, and when it is determined from the monitoring that an abnormality has occurred in the master station, the first slave station replaces the master station with the alarm signal. A third step of sequentially issuing an alarm individually to each subsequent slave station after the occurrence of the abnormality according to the subsequent slave station information included therein, which comprises a master station and a plurality of slave stations. Alarm slave station proxy control method for alarm system. 2. A first step in which a master station sequentially issues an alarm individually to the plurality of slave stations by using a warning signal that can be received simultaneously by a plurality of slave stations, each of the slave stations comprising: A second step of monitoring the normal termination of the alarm signal transmitted from the master station and including each slave station information, judging from the monitoring that an abnormality has occurred in the master station, and performing alarm control before the own station. When it is determined that the slave station does not start the control operation, the slave station that has made the determination, in accordance with the subsequent slave station information included in the alarm signal received before the determination, performs the abnormality on behalf of the master station and the slave station. The third step of individually issuing an alarm to each subsequent slave station after the occurrence,
An alarm slave station proxy control method for an alarm system comprising a master station and a plurality of slave stations.