JPH0477899A - Disaster preventing system - Google Patents

Abstract

PURPOSE:To prevent a storage capacity from being large by storing output within a constant period from the access time of an analog sensor, storing data close to the access time temporarily finely and storing the data remote from it roughly. CONSTITUTION:A repeater 2 stores the output of an analog sensor 3 in a logarithm actual condition table. That is, the logarithm actual condition table consists of a period table and a specified address data buffer to store the data of the specified address of the period table. The data close to time when the analog sensor 3 is accessed are stored finely every 3 seconds and the data remote to the access time temporarily are stored roughly such as every 1 minute, every 10 minutes and every 1000 minutes. Thus, the data to extend over long time can be stored with a smaller storage capacity.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention performs time-division multiplex data transmission between a plurality of analog sensors and a monitoring device via a sensor line, and the monitoring device This relates to a disaster prevention system that centrally monitors the output status of sensors. [Prior art] As a disaster prevention system, data is transmitted via time division multiplexing between multiple analog sensors and a monitoring device via a sensor line, and the monitoring device centrally monitors the output status of the analog sensors. There is a self-fire alarm system that centrally monitors fires in buildings, as shown in Figure 3. The self-fire alarm system consists of a receiver 1 that centrally monitors fires, a repeater 2 connected to the receiver 1 via a two-wire transmission line, and a repeater 2 connected to the receiver 1 via a transmission line I-. a plurality of repeaters 2' connected to the receiver 1 to control the district health system 4 and the fire door 5, respectively; and a plurality of analog sensors 3 connected to the repeater 2 via the sensor line l. Consisting of Here, a terminator 6 is connected to the end of the sensor line l. This self-fire alarm system J) The analog detector 3 has a unique address set and outputs an analog value according to smoke concentration and ambient temperature, and the repeater 2 cyclically accesses the analog detector 3 in sequence. Data transmission is performed by so-called time division multiplexing in which the output from the analog sensor 3 is sent back, and the output from the analog sensor 3 is monitored by the repeater 2. The repeater 2 that receives the output from the analog sensor 3 stores the output in the current table as shown in FIG. In addition,
This current status table stores the output from the analog sensor 3 for a certain period of time from the time of access to all the analog sensors 3. Analog sensor 3 by accessing the sidetone of
3 from the time of access to the current table.
When storing the output of the analog sensor 3 up to the minute before, the current table will store (60 pieces of data for 31 analog sensors 3).The current output of the analog sensor 3 is , is stored in the address immediately before the value indicated by the pointer.In addition, in this current table, when the number of data exceeds 60 (number of data for 3 minutes), the oldest data is deleted and the latest data is The data will be memorized. Then, the current output of the analog sensor 3 stored in the current status table is set to the forecast level (the level at which the forecast is made), the fire alarm level (the level at which the district bell 4 alerts the fire), and the interlocking level (the level at which the fire alarm is issued by the district bell 4). The current status of the repeater 2 is determined by comparing it with each of the levels (drive control level). In addition, in this repeater 2, even if the output of the analog sensor 3 once exceeds any of the levels listed in -1-, decreases to below that level7, and exceeds that level again, any of the above levels will occur. A forecast every time you exceed a level! (a state that requires a forecast), a fire alarm state (a state that requires ringing the district bell 4), and an interlocking state!f5 (a state that requires rQ to drive and control the fire door 5). A so-called non-accumulation processing judgment is made to judge that the fire alarm level has reached 5.Here, each of the above levels (forecast level ≦ fire alarm level 5 is linked, and there is a relationship of l\r. Data transmission is also performed by time division multiplexing between the analog sensors 3 and 3, and if the output of the analog sensor 3 exceeds any level, the repeater 2 transmits the current situation indicated by the output level to the receiver as monitoring data. Furthermore, if it is determined that the output state of the analog sensor 3 is in the forecast state, disaster warning state, or linked state, the repeater 2 interrupts the polling of the receiver 1. , and sends the monitoring data back to the receiver 1 when the receiver 1 accesses the interrupt. Then, when the receiver 1 receives the monitoring data from the repeater 2, it sends the monitoring data back to the receiver 1 in response to the monitoring data. Forecasting is performed, or alarm control of the district bell 4 via the repeater 2', or drive control of the fire door 5. In the following explanation, analog The monitoring data sent from the repeater 2 to the receiver 1 when the output of the sensor 3 exceeds the forecast level is called forecast data, and the monitoring data when the output exceeds the fire level is called fire alarm data. By the way, in addition to storing the so-called current output as mentioned above, the repeater 2 also stores the information when the output of the analog sensor 3 exceeds the forecast level and the forecast level. In other words, the data of the current table when the output of the analog sensor 3 exceeds the forecast level is stored in the first history buffer, and the data of the forecast level is stored in the first history buffer. The output of the analog sensor 3 for a certain period after the time when the forecast data is exceeded is stored in a second history buffer, and the history before and after the repeater 2 sends the forecast data to the receiver A is recorded. In addition, in the second history buffer, when the output of the analog sensor 3 exceeds the fire alarm level and the interlocking level, the output of the analog sensor 3 is
The output for a certain period until the output reaches the respective level is stored. As shown in FIG. 5, each of the above-mentioned history buffers can also store outputs for a certain period of time, same as the current table, for the analog sensor 3 of 1-). Therefore, as described above, when the repeater 2 accesses all analog sensors 3 once every 3 seconds and stores the outputs of the analog sensors 3 from the access point to 3 minutes ago in the current table, will also store 60 pieces of data in each history buffer. Note that there are a certain number of records in these history buffers, for example,
Up to 8〉〉 J〉 The history data of the analog detector 3 can be stored. Below 7, the operation of the self-fire alarm system when the output of the analog detector 3 shown in Fig. 6 is obtained, and the current situation The data contents stored in the data table and the two history buffers will be explained. Here, a case is shown in which the output of the analog sensor 3 exceeds the forecast level and the output of the analog sensor 3 falls below the fire alarm level and does not cause a fire. First, as shown on the left side of FIG.
and writes the data of the current table in which data is stored (not shown in part A of FIG. 6) into the first history buffer. Then, the output of the analog sensor 3 (indicated by Y) for 3 minutes after the transmission of the forecast data that is heard at a constant rate is stored in the second history buffer. For example, at tp in Figure 6, at least 3 minutes have passed after the forecast data was sent)
When the receiver 1 looks at the history data, the two history buffers of the repeater 2 have data stored in the A part and Y part in the figure, respectively. Therefore, receiver 1
When forecast data is received, it is possible to know the historical data for a certain period before and after the point in time.For example, as shown in the above-mentioned point 3 in Fig. 6, the output of the analog sensor 3 once exceeds the forecast level. However, even if it is later predicted to drop below Hell, the receiver 1 can know the state of the change in the output of the analog sensor 3 at that time, and perform a false alarm analysis to determine how such a situation occurred. It becomes Noh. Note that the data of the X portion is stored in the current chifur at times t and p. Then, as shown on the right side of Fig. 6, when the output of the analog sensor 3 exceeds the forecast level again, the current Chiful data at that time point 12 (not indicated by B in the figure) is written into the first history buffer. At the same time, the output of the analog sensor 3 for a certain period thereafter (not shown by Y' in the figure) is written into the second history buffer. However, in this case, no new forecast data is sent to the receiver 1. In other words, in this repeater 2, once the output of the analog sensor 3 exceeds the forecast level, the output monitoring data is maintained in the same state unless there is a cancellation command from the receiver 1. It's Nishide. Then, when the output of the analog sensor 3 exceeds the fire alarm level and the interlocking level,
Each time point 1. ．． 1. , the repeater 2 sends the fire alarm data and the linked alarm data to the receiver 1, and writes the data of the current table (indicated by C and D in the figure) into the second history buffer. Here, in the case of a fire, the first history buffer holds the data of the current table as it is at the time t2 when the output of the analog sensor 3 exceeds the forecast level. [Problems to be Solved by the Invention] However, in the conventional fire alarm system described above, when it is necessary to monitor output changes of analog sensors over a long period of time, a current table with a very large storage capacity is required. There was a problem. The present invention has been made in view of the above points, and its purpose is to provide a disaster prevention system in which a repeater can store changes in the output of an analog sensor over a long period of time with a small storage capacity. There is a particular thing. [Means for Solving the Problems 1] In order to achieve the above object, the present invention stores the output of an analog sensor for a certain period of time from the access time, and also stores data temporally close to the access time in detail,
The monitoring device is provided with a storage means for storing distant data in a rough manner. [Function] The present invention provides the above-mentioned storage means in the monitoring device, so that even if the monitoring device stores the output changes of the analog sensor over a long period of time, the data that is further away in time than the access point is not stored. In other words, the data can be compressed and stored, so that the storage capacity does not increase. [Example] An example of the present invention is shown in FIGS. 1 and 2. This embodiment also uses a self-fire alarm system as an example, and the basic configuration and basic operation of the self-fire alarm system are the same as those explained in the prior art section, and the characteristics of this embodiment are as follows. However, the point is that the repeater 2 stores the output of the analog sensor 3 in a logarithmic current table. In this embodiment, the logarithmic current table is used, the detailed data storage contents are a period table shown in FIG. 1, which will be described later, and a specific table shown in FIG. It consists of an address data buffer. The repeater 2 of this embodiment also accesses all the analog sensors 3 once every 3 seconds, returns the output of the analog sensors 3, and stores the output in the above period table as in the conventional one. Remember. And 1. The - period table stores 60 outputs for one analog sensor 3 in the same way as the conventional current state table, erases the oldest data, and stores the latest data. However, in the case of this example,
Instead of storing the output of the analog sensor 3 up to 3 minutes before the access time like the conventional current status table, it stores the output of the analog sensor 3 up to 9000 minutes/150 hours (approximately 6 days) before the current time. Remember. The method of storing the output of the analog sensor 3 in the period table and the specific address data buffer will be explained according to Table 1. Table 1 9 Row 2o11. -2 TI -2911-3ri [1.3 If 2 o (III + s + b + e
o It + 6o II o-low 2 tT
II -30II -5■ The numbers 0 and 5 attached to the -1- column of Table 1 above indicate the address of the period table, and as shown in the lower column, the time when the analog sensor 3 is accessed is set as the current time. Past 900
The output of the analog sensor 3 up to 0 minutes ago is stored at each address as follows. -), 0 to 1 () is every 3 seconds (current, 3 seconds ago, 6 seconds ago, ...57 seconds ago), 20 to 29 is every 0 minutes (1 minute ago, 2 minutes ago...・, 9 minutes before), 30 to 3 every 10 minutes 10 minutes before, 20 minutes before 1... 90 minutes before), 40
~49 every 100 minutes (100 minutes ago, 200 minutes ago,...
, 900 minutes ago), 50~5≦) every 1000 minutes <1.0
00 minutes ago, 2000 minutes ago..., 9000 minutes ago) is stored. Then, 20.30 and 40.50 of the period table are stored in the specific address data buffer.
Store address data. Here, if the access time from the second to third row of Table 1 is the starting point, and the data stored at address 0 at that time is rl Q, then at that access time, the period table is rl 1l-rl-59. up to 60
data will be stored. At this time, the specific address data buffer contains n-20, rl-3o, I
I −<o, rl, 0 is stored. After 3 seconds have elapsed, as shown in the fourth row from the top, data II, which is the output of the new analog sensor 3, is written to address 0. At this time, the data from addresses O to 20 are written to Among these data, the oldest data rl-2
6 is erased, and thereafter, data at address 20 is erased every 3 seconds while shifting to the right and new data is written at address O. However, at this point, the data from address 21 onwards is held as is. Then, when one minute has passed, as shown in the fifth row from the top of Table 1, new 21 pieces of data rl including the origin access point at addresses 0 to 20 are added.
20 ``' rl (+ is written. At this time, the data r + - 2° (period daple) stored in the specific address data buffer and written to address 20 at the time of the start point access is 3 seconds from the time of the start point access. Read the data that was erased after the elapsed time), write the corresponding data rl-z,, to address 21 of the period table, and write the new data to address 20]
Data r1. is written to a specific address data buffer. At this time, the data at addresses 21 to 30 are shifted one step to the right.
Delete rl-3o, which is the oldest data. and,
After 3 seconds have passed, the data at addresses 0 and 20 will be changed to 6
sent and updated, and every additional minute that passes, 21
The data at addresses ~30 are shifted to the right by 11σ degrees and updated. Similarly, after 10 minutes have elapsed, data rl-3o that was written to address 30 at the time of the start point access stored in the specific address data buffer (data erased after 1 minute has elapsed from the time of the start point access on the period table) Read the data at addresses 7.31 to 40 to the right 1')
~, te, the above data n-c. is written to address 31 of the period table. Furthermore, after 100 minutes and 1,000 minutes have passed, the data is updated in the same way. In this way, data close to the time when the analog sensor 3 is accessed is stored in detail in 3-second increments, and data further away in time from the access time is stored in 1-minute increments. By storing data roughly in 10 minute increments, . Therefore, for example, analog sensor 3
When the data reaches the forecast level, long-term data can be transmitted to the receiver 1 with a small amount of data. [Effects of the Invention] As described above, the present invention stores the output of the analog sensor σ for a certain period of time from the access point, and stores data temporally close to the access point in detail, and data further away is stored coarsely. Since the monitoring device is equipped with a storage means for
Even if a monitoring device stores changes in the output of an analog sensor over a long period of time, data further away in time than the access point can be compressed and stored, so the storage capacity will not increase.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of a period table according to an embodiment of the present invention, Fig. 2 is an explanatory diagram of a specific address data buffer, Fig. 3 is a system configuration diagram of a self-fire alarm system, and Fig. 4 is the current state of the conventional example. FIG. 5 is an explanatory diagram of the table, FIG. 5 is an explanatory diagram of the history buffer same as above, and FIG. 6 is an explanatory diagram of the operation same as above. 1 is a receiver, 2 is a repeater, 3 is an analog sensor, - is a signal line, and l is a sensor line. Agent Patent Attorney Ishi 1) Choshichi

Claims (1)

[Claims] (1) Multiple analog sensors with unique addresses set and outputting analog values according to the sensing target are connected to a monitoring device via a sensor line, and the monitoring device sequentially checks the analog sensors in chronological order. In a disaster prevention system that monitors the output status of all analog sensors individually by accessing the output cyclically and returning the output, it is possible to memorize the output from the analog sensor for a certain period of time from the point of access, and to access it temporally. A disaster prevention system characterized in that a monitoring device is equipped with a storage means for storing data close to a point in time in detail and storing distant data in a rough manner.