JPH03238592A - Automatic fire alarm system - Google Patents

Abstract

PURPOSE:To make it possible to check the state of an output change even on the receiver side by providing each repeater with a 2nd storage means for storing a selected pattern together with the address of an analog sensor. CONSTITUTION:Each repeater 2 is provided with a history buffer to be a 1st storage means for storing the output of an analog sensor whose output exceeds any one of a forecasting level, a fire alarm level and an interlocking alarm level during the fixed periods before and after exceeding the level, a selection means for selecting an output change pattern most close to the output change of the sensor 3 from previously stored patterns of a specific kind and a pattern buffer to be the 2nd storage means for storing the selected pattern together with the address of the analog sensor 3 concerned. Consequently, the state of a change in the output of the analog sensor 3 during the fixed periods before and after the output of the sensor 3 exceeds the forecasting level can be checked on the receiver side.

Description

Detailed Description of the Invention [Industrial Application Field 1] The present invention includes a plurality of analog sensors that output analog values according to smoke concentration and ambient temperature, and the output of the analog sensors is 411! Multiple numbers 491+7 preset on the device
This relates to a self-fire alarm system that sends a notification to a receiver in accordance with the level when the level is exceeded.

[Technology in the US 1 Figure 6 shows a distributed processing type self-fire alarm system in the US. This self-fire alarm system includes a receiver 1 that centrally monitors fire;
A plurality of repeaters 2 are connected to this reception 8!1 via a 2@-type transmission @L, and a district bell 4 and a fire door 5 are also connected to the receiver 1 via a transmission #i[I-. The self-fire alarm system consists of a fire alarm system 2" and a plurality of analog detectors 3 connected to the repeater 2 via a four-sensing #il. 3 has a unique address set and outputs an analog value according to the smoke concentration and ambient temperature. The analog sensors 3 are placed, for example, on each floor, and the repeater 2 sequentially accesses the analog sensors 3 by cycling, and performs data transmission by so-called time division multiplexing, in which the accessed analog sensors 3 return their outputs. The relay device 2 monitors the output of the analog sensor 3.The repeater 2 that receives the output of the analog sensor 3 stores the output in the current table.In addition, in the current table, the access point of the analog sensor 3 is This is to store the outputs of all analog sensors 3 up to a certain period before.

Therefore, the repeater 2 accesses all analog sensors 3, for example, once every 3 seconds, returns the output of the analog sensors 3, and displays the current status table of the analog sensors 3 up to 3 minutes ago from the time of access. When storing the output, 60 pieces of data for one analog sensor 3 will be stored in the current table. Further, in this current state table, when the number of data exceeds 60 (the number of data for 3 minutes), the oldest data is deleted and the latest data is stored.

The repeater 2 then outputs the current output of the analog sensor 3 stored in the current status table to the forecast level (the level at which the forecast is made), the fire alarm level (the level at which the district bell 4 issues a fire alarm), and the interlocking level. (levels for controlling the drive of the fire door 5), the current situation is determined. In addition,
In this repeater 2, even if the output of the analog sensor 3 once exceeds one of the above levels, decreases below that level, and then exceeds that level again, the output of the analog sensor 3 increases every time it exceeds one of the above levels. Each time the forecast condition (a condition that requires a forecast!!!), a fire alarm?! (a condition that requires the district bell 4 to ring!!!) and an interlocking condition!!! (a condition that requires a fire door 5 to be controlled) A so-called non-accumulation processing determination is made to determine that a certain condition has occurred.Here, the above-mentioned levels are in the relationship of forecast level≦fire alarm bell≦interlocking level.

Data is transmitted by time division multiplexing even in the dark between the repeater 2 and the receiver W11, and if the output of the analog sensor 3 exceeds any level, the repeater 2 will transmit the current status indicated by the output level. is sent to the receiver 1 as monitoring data. Furthermore, specifically, when it is determined that the output state of the analog sensor 3 is in the forecast state, fire alarm state, or interlocking state, the repeater 2 interrupts the polling of the receiving fI 111 and receives the signal in response to the interrupt. The monitoring data is sent back to the receiver 1 when accessed from the receiver 1. When the receiver ml receives the monitoring data from the repeater 2, it performs forecasting, alarm control of the district bell 4 via the repeater 2', or drive control of the fire door 5 in accordance with the monitoring data. In addition, when it is necessary to distinguish the contents of monitoring data in the following explanation, the monitoring data sent from the intermediate Ia device 2 to the receiver 1 when the output of the analog sensor 3 exceeds the forecast level is referred to as the forecast data. We will identify and call the monitoring data when the fire level exceeds the fire alarm data, and the monitoring data when the interlocking level is exceeded the interlocking silver data.

By the way, in the repeater 2, in addition to storing the so-called current output as described above, the output of the analog sensor 3 is also stored at the above-mentioned forecast level.
A history is kept of when the fire alarm level and interlock level were exceeded. In other words, the data of the current table when the output of analog sensor 3 exceeds one of the levels is stored in the history buffer, and that data is held until the next output of analog sensor 3 exceeds one of the levels mentioned above. Then, a history is kept until the repeater 2 sends monitoring data such as forecast data to the receiving fiA. Note that the history buffer γ can also store the output for one analog sensor 3 for a certain period of time, which is the same as the current table, so all analog sensors 3 are accessed once every 3 seconds as described above.
If the current table stores the output of the analog sensor 3 from the time of access up to three minutes ago, 60 pieces of data will also be stored in the history buffer. Note that history data of up to a certain number (for example, 8) of analog sensors 3 is stored in this history pan 7γ.

When a fire occurs, as shown on the right side of FIG. 7, the output of the analog sensor 3 increases and exceeds the forecast level, fire alarm level, and interlock level, respectively. For example, when the output of the analog sensor 3 exceeds the forecast level (at time 12), the repeater 2 stores the data stored in the current table at that time t2 in the history bar/77,
Send forecast data to receiving f911. Note that the data stored in this history buffer can be viewed by the receiver m1. Then, when the output of the analog sensor 3 exceeds the fire alarm level and the interlocking level, the data of the current table is written to the history buffer t at each time tz+t+, and the history buffer is It updates the stored data and sends fire aircraft data and interlocking report data to the receiving file. Incidentally, when the repeater 2 sends the monitoring data to the receiver 1, it also sends the address of the analog sensor 3 to the receiver (2) so that the analog sensor 3 in the above-mentioned output state can be specified.

[Problem to be solved by the invention 1 By the way, if the output of the analog sensor 3 exceeds the forecast level on -day, but then falls below the forecast level,
In other words, the left side of Figure 7 shows a case where no fire occurred. In this case, the repeater 2 stores the data of the current table in the history buffer T and sends the data to the receiver 1 at the point when the output of the analog sensor 3 exceeds the forecast level. Send forecast data. Then receive!9!1″c
can see the historical data in part A of FIG.

However, in this case, the output of the analog sensor 3 decreases below the forecast level for at least a certain period of time (for example,
When storing data for the past 3 minutes in the current table, it is not possible to know the output change state of the analog sensor 3 which has entered the forecast state after transmitting the forecast data at the time tp after 3 minutes or more has elapsed. However, if you look at the current table at an appropriate time after sending the forecast data (for example, 3 minutes later if the current table stores data for the past 3 minutes),
Although it is possible to know the state of change in the output of the analog sensor 3 in the above case, this poses a problem in terms of usability.

The present invention has been made in view of the above points, and its purpose is to determine the state of change in the output of an analog sensor for a certain period of time before and after the time when the output of the analog sensor exceeds the forecast level. The objective is to provide a self-fire alarm system that can be understood by the receiver.

[Means for Solving the Problems 1] In order to achieve the above object, the present invention provides a method for detecting signals for a certain period before and after the time when the output of any analog sensor exceeds any level set in the repeater. A first storage means for storing the output; and a specific storage device that stores in advance an output change pattern that most closely approximates the output change of the analog sensor when the output for a certain period before and after is stored in the first storage means. The repeater is provided with a selection means for selecting from different types of patterns, and a second storage means for storing the selected pattern together with the address of the analog sensor, and is stored in the first storage means from the receiver to the repeater. When there is a request for the selected data, the repeater sends data indicating the selected pattern to the receiver.

[Function 1] As described above, the present invention allows the repeater to store the output for a certain period before and after the time when the output of the analog sensor exceeds one of the levels set in the repeater. If the receiver requests the repeater to output the output for a certain period before and after exceeding the level of The output for a certain period before and after the time exceeded is patterned and stored, and when the receiver requests the data for the certain period, the repeater sends the patterned data to the receiver. This makes it possible to reduce the amount of data sent from the repeater to the receiver.

[Example 1 An embodiment of the present invention is shown in FIGS. 1 to 5.

In this example, the history serves as a first storage means for storing outputs for a certain period before and after the time when the output of any analog sensor 3 exceeds the forecast level, fire alarm level, and interlocking alarm level, respectively. a buffer; and a selection means for selecting an output change pattern that most closely approximates the output change of the analog sensor 3 from a specific type of pre-stored pattern when the outputs for a certain period of time before and after are stored in the history buffer; A feature is that the repeater 2 is provided with a pattern buffer serving as a second storage means for storing the selected pattern together with the address of the analog sensor 3.

The repeater 2 of this embodiment stores the outputs of the analog sensors 3 for all analog sensors 3 from the access point of the analog sensors 3 until a certain period of time ago in the current state table shown in FIG. f83. For example, if repeater 2 is analog sensor 3
When accessing once every 3 seconds and storing the output of analog sensor 3 up to 3 minutes ago, the above current table contains 6
0 data will be stored. Note that the current output of the analog sensor 3 is in the address immediately before the value indicated by the write pointer.

Further, in the history buffer shown in FIG. 4, the output of the analog sensor 3 for a certain period before and after the time when any level is exceeded is stored, as described above. For example, if repeater 2 accesses analog sensor 3 once every 3 seconds,
This history pan 7a contains data (tIIJ
Indicated by A'' to D'' in Figure 5. The number of data is 30) and the data for 1.5 minutes after the elapse of that point (indicated by A'' to D'' in FIG. 5; the number of data is 30) are stored in the history buffer T. Note that the history pane 7a stores the outputs of up to a certain number (for example, eight) of the analog sensors 3, as in the past.

Furthermore, the pattern buffer may contain, for example, a pattern showing a sudden change in the output of the analog sensor 3 as shown in FIG. Although the output of the analog sensor 3 shown in FIG. 3(c) once exceeded one of the levels,
The pattern etc. when the level drops below that level, etc.
When a pattern close to R is selected by comparing the change in the output of the analog sensor 3 that exceeds any level by a selection means, the address of the analog sensor 3 and the selected pattern are stored. However, this pattern buffer stores data of up to the same number of analog sensors 3 (e.g., 8) as the history buffer.

The following describes the operation when the output of the analog sensor 3 shown in FIG. 5 is obtained, and the data contents recorded in the current state table, history buffer, and pattern buffer. For example, as shown in FIG. 5, a case will be described in which the output of the analog sensor 3 exceeds the forecast level (but does not reach the fire alarm level and decreases and does not cause a fire), and then a fire occurs. First, as shown on the left side of the t1tJ5 diagram, when the output of the analog sensor 3 exceeds the forecast level (time 1+), the current status table of the repeater 2 is displayed with the data shown in part A of Figure 5 (for 3 minutes). data) is recorded
fl, and sends forecast data to receiver 1.
First, half of the data in the current table (data from the time when the forecast level was exceeded to 1.5 minutes ago, indicated by A' in FIG. 5) is first written into the history buffer γ. At this time, the address of the corresponding analog sensor 3 is also sent to the receiver 1 along with the forecast data. After that, the output of the analog sensor 3 is stored in the fl history pan 7a for a certain period of time (1.5 minutes after transmitting the forecast data). When all the outputs of the analog sensor 3 (indicated by A'' in FIG. 5) for 1.5 minutes after sending the forecast data are stored in this history buffer, the analog sensor 3 stored in the history buffer T The output change pattern No. 3 is compared with the patterns shown in FIGS. 1(,) to (e) using a selection means, and the closest one is selected. Note that the pattern shown in FIG. 1 is an example.
You may also register that particular pattern. The pattern selected by this selection means is stored in the pattern buffer together with the address of its analog sensor 3.

Now, for example, at time tp in Figure 5 (forecast data transmission t&
If there is a request from the receiver 1 for historical data of the analog sensor 3 that exceeds the forecast level after 3 minutes or more has elapsed, the repeater 2 transmits the pattern stored in the pattern buffer to the receiver 1 at this time. send. Here, reception W11
The reason why the pattern stored in the pattern buffer is sent when history data is requested from the controller is to send the B history data of the analog sensor 3 with a small amount of data.

Then, as shown on the right side of FIG. 5, when the output of the analog sensor 3 exceeds the forecast level again, the data of half of the current table at that point [2] (5th
At the same time, the output of the analog sensor 3 for a certain period of time (indicated by B'' in FIG. 5) is written.
is written. 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 as it is unless there is a release command from the receiver 1, for example. There is. Then, when the output of the analog sensor 3 exceeds the fire alarm level and the interlocking level, the repeater 2 transmits half of the data in the current table (indicated by C' and D' in Fig. 5) at each time t3Tt4. In addition to writing to the history buffer, k disaster warning data and interlocking warning data are sent to the receiver 1. Then, when all the outputs of the analog sensor 3 (indicated by B" and C" in Fig. 5) for 1.5 minutes after the transmission of the fire alarm data or linked alarm data are stored in the history buff 7γ, the history The selection means compares the output change pattern of the analog sensor 3 stored in the buffer T with the patterns shown in FIGS. 1(a) to (c), selects the closest one, and selects the selected pattern as It is stored in the buffer together with the address of the analog sensor 3. In this case as well, if there is a request for history data from the receiver (ifil), the repeater 2 sends the pattern of the corresponding analog sensor 3 to the receiver 1.As described above, according to this embodiment, the analog sensor 3
When the output of the analog sensor 3 exceeds any level, the change in the output of the analog sensor 3 for a certain period before and after that point can be determined by the receiver 1 from the pattern sent from the repeater 2 to the receiver 8!1. Moreover, since the repeater 2 is configured to send data indicating the pattern as history data to the receiver 1,
It is possible to reduce the amount of data transmitted to the receiver 1.

By the way, in the explanation of the above embodiment, data indicating a pattern is sent when there is a request for history data from a received file, but it is also possible to send the history data itself in response to a request. good.

[Effect of the Invention 1] As described above, the present invention has a first sensor that stores the output for a certain period before and after the time when the output of any analog sensor exceeds any level set in the repeater. Since storage means is provided in the intermediate unit, if the receiver lights up the repeater and requests the output for a certain period before and after each level is exceeded, the receiver can also record the status of the output change. The output change pattern that most closely approximates the output change of the analog sensor when the outputs of the preceding and following fixed periods are still stored in the first storage means is selected from pre-stored specific types of patterns. The repeater is provided with a selection means and a second storage means for storing the selected pattern together with the address of the analog sensor concerned, and when the receiver requests the repeater for the data stored in the first storage means. If
Since the repeater sends data indicating the selected pattern to the receiver, the amount of data sent from the repeater to the receiver can be reduced.

[Brief explanation of drawings]

Figures 1 (,) to (e) are explanatory diagrams showing pattern models when output changes of an analog sensor are patterned using a repeater according to an embodiment of the present invention, and Figure 2 is a pattern buffer T
Fig. 3 is an explanatory diagram of the current table, fPJ4 diagram is an explanatory diagram of the history buffer, vJS diagram is an explanatory diagram of the operation, and Fig. 6 is an explanatory diagram of the current table.
The figure is a system configuration diagram of a self-fire alarm system, and FIG. 7 is a UA explaining the operation of a conventional example. 1 is a receiver, 2 is a repeater, 3 is an analog sensor, I7 is a signal line, and e is a sensor line. Figure a (0) (b) (C) Figure 2 Figure 6

Claims (1)

[Claims] (1) An analog sensor with a unique address set and outputting an analog value according to smoke concentration and ambient temperature, and multiple analog sensors connected via a sensor line, which cyclically activate each analog sensor one after the other. It consists of a repeater that can be accessed and monitors the output individually, and a receiver that connects multiple repeaters via transmission lines and transmits data to each repeater. In a self-fire alarm system in which the repeater notifies the receiver according to the level when the repeater exceeds multiple levels preset on the repeater, the output of one of the analog sensors is transmitted to the repeater. a first storage means for storing the output for a certain period before and after the time when the output exceeds one of the levels set respectively; a selection means for selecting an output change pattern that most closely approximates the output change of the sensor from pre-stored specific types of patterns; and a second storage means for storing the selected pattern together with the address of the analog sensor. is provided in the repeater, and when the receiver requests the repeater for data stored in the first storage means, the repeater sends data indicating the selected pattern to the receiver. system.