JP2791423B2 - Fire alarm - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire alarm system for detecting a smoke density, a temperature, and the like, and issuing a fire alarm.

[0002]

2. Description of the Related Art There has been known a fire alarm system as disclosed in, for example, Japanese Patent Application Laid-Open No. Hei 12-12398. FIG.
FIG. 2 is a configuration diagram of the fire alarm device. Referring to FIG. 7, in this fire alarm device, analog sensors E-1 to En that detect smoke, temperature, and the like due to a fire are connected to a transmission line 51 drawn from a receiver 50.
0 is for judging a fire based on the analog data from the analog sensors E-1 to En. At this time, the receiver 50 is provided with a graphic display unit 52. When the receiver 50 performs arithmetic processing on analog data of the analog sensor and predicts that the alarm level will be reached after a predetermined time, a pre-alarm is performed. And a fire prediction curve 59 in which analog levels such as smoke and density are taken on the vertical axis and time is taken on the horizontal axis, based on the arithmetic processing, is displayed on the graphic display section 52. Specifically, when the analog data from one of the analog sensors E-1 to E-n, for example, the analog data from the analog sensor E-1 exceeds a predetermined level, the receiver 50 transmits the signal from the analog sensor E-1. The analog data is read a plurality of times to start a prediction calculation, and the remaining time until the smoke density analog data reaches, for example, a 20% alarm level is calculated from the calculation result obtained by the prediction calculation. When is turned off, a pre-alarm is output. By the output of the pre-alarm, a pre-alarm display, a message display, and a trend switch display are performed on the graphic display unit, and the fire prediction curve 59 can be displayed by the operator pressing the trend switch display portion with a finger.

When a fire prediction curve 59 based on a pre-alarm for the analog sensor E-1 is displayed, in addition to this, the time change of the analog data actually detected by the analog sensor E-1 is displayed. It can also be plotted.

As described above, in the fire alarm device of FIG. 7, when a pre-alarm is output based on a prediction calculation of analog data, a trend switch is displayed on the graphic display section 52, and the trend switch is displayed. By operating the part, the fire prediction curve 59 can be displayed. By clearly grasping the pre-alarm point and the point at which the alarm level is reached on the fire prediction curve 59, the operator intends to appropriately determine the situation after the pre-alarm and take a countermeasure.

[0005] In particular, by plotting and displaying the time change of actual analog data in addition to the fire prediction curve 59, it is possible to accurately judge whether the change is abrupt change above the fire prediction curve or non-fire data below the fire prediction curve. It is intended that the situation judgment and the countermeasures after the pre-alarm be taken more appropriately.

[0006]

However, in the above-described conventional fire alarm device, when one analog sensor outputs a pre-alarm, the graphic prediction unit 52 displays a fire prediction curve for this one analog sensor. Since only the time change of the analog data is displayed graphically, there is a problem in that when this one analog sensor malfunctions due to aging or the like, an erroneous fire determination is made.

According to the present invention, even when one analog sensor is malfunctioning due to aging or the like, it is possible to reduce a situation in which an operator makes a mistake in a situation judgment or a countermeasure, thereby facilitating accurate fire judgment. It is an object of the present invention to provide a fire alarm device capable of promptly and appropriately performing an operation by an operator.

[0008]

In order to achieve the above object, according to the first aspect of the present invention, a plurality of sensor terminals are connected to a transmission line to process data from the plurality of sensor terminals. In a fire alarm device for making a fire judgment or the like, a display means capable of displaying a trend graph of a sensor terminal is provided. When the trend graph of a certain sensor terminal is displayed, the display means displays the trend graph of the sensor terminal. Is characterized in that a trend graph of a nearby sensor terminal having a close relationship with the sensor terminal can be superimposed and displayed. Further, the fire alarm device according to claim 2 is:
Each of the plurality of sensor terminals further includes a registration unit capable of registering a sensor terminal having a close relationship with the sensor terminal as a proximity sensor terminal, and the display unit displays a trend graph of the certain sensor terminal. Sometimes, when a proximity sensor terminal is registered for the sensor terminal, the trend graph of the proximity sensor terminal can be superimposed and displayed on the trend graph of the sensor terminal. . When a trend graph of a certain sensor terminal is displayed, by superimposing and displaying a trend graph of a neighboring sensor terminal having a close relationship with the sensor terminal on the trend graph of the sensor terminal, output comparison at the same time can be performed. As a result, even if one sensor terminal malfunctions due to aging or the like, a fire can be performed by referring to a trend graph of another sensor terminal that is close to the sensor terminal. Judgments and the like can be made accurately and easily.

According to a third aspect of the present invention, when the trend graph of a nearby sensor terminal is superimposed and displayed on the trend graph of a certain sensor terminal, the type of the nearby sensor terminal is different from the type of the sensor terminal. In this case, a scale suitable for the proximity sensor terminal is also displayed. Accordingly, even when the type of the proximity sensor terminal is different from the type of the sensor terminal, it is possible to quantitatively grasp the data of the proximity sensor terminal.

According to the fourth aspect of the present invention, when a trend graph of a nearby sensor terminal is superimposed and displayed on a trend graph of a certain sensor terminal, the type of the nearby sensor terminal can also be displayed. Accordingly, the type of the proximity sensor terminal can be easily determined, and an overall determination error can be prevented.

The invention according to claim 5 is characterized in that the trend graph can be displayed at any desired time. As a result, not only a fire judgment, but also maintenance and inspection of the sensor terminal can be easily and accurately performed.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram of one embodiment of a fire alarm device according to the present invention. In the fire alarm device of FIG. 1, sensor terminals D-1 to D-n for detecting analog data such as smoke and temperature are provided.
Is connected to the transmission line 7, and the central device 1 determines a fire based on analog data sent from the sensor terminals D-1 to D-n via the transmission line 7. .

Here, the central processing unit 1 includes a central processing unit 2 for performing overall control, a memory (for example, a ROM) 3 in which a control program of the central processing unit 2 is stored, and data and tables required for processing. (For example, a RAM) 4 in which information and the like are stored, a display unit 5, and an alarm output unit 6.

According to the control program stored in the memory 3, the central processing unit 2 cyclically calls each of the sensor terminals D-1 to Dn sequentially by, for example, address polling or the like. When analog data such as smoke and temperature is returned from the calling sensor terminal,
The analog data is arithmetically processed to make a fire determination or the like. Specifically, for example, when the level of the analog data reaches the first reference level (fire level), it is determined that a fire has occurred, an alarm signal is output, and a fire alarm is issued from the alarm output unit 6. It is controlled to be performed. When the level of the analog data is lower than the first reference level (fire level), but reaches a second reference level at which a fire may occur, an alarm signal is output.

The display unit 5 has a screen configuration as shown in FIG. 2, for example. In this example, the display unit 5
Consists of a touch panel display, etc.
It has an output display unit for displaying and outputting data and the like, and an input display unit for performing key input and the like when an operator touches with a finger. In other words, the display unit 5 serves as an output display unit, as an alarm signal from the central processing unit 2,
Alternatively, a data display area 11 for displaying that the analog level has reached the second reference level or reaching the first reference level by an alarm signal, or for displaying a trend graph described later, A message display area 12 for displaying a message or the like is provided.
As an input display unit, there are provided a trend display key 13, a return key 14, a proximity key 15, a previous report key 16, a next report key 17, and the like.

Here, the trend graph means that the vertical axis indicates smoke,
It is a graph in which analog levels such as temperature are taken, and the horizontal axis is time, which may directly display analog data sent from the sensor terminal, or JP-A-2-12398. As shown in the above, a fire prediction curve predicted on the basis of analog data may be used, or further, analog data may be superimposed and displayed on the fire prediction curve. Regardless of the display, the analog data sent from each sensor terminal is stored in, for example, the memory 4 for displaying a trend graph.

The trend display key 13 is used to switch the display contents of the data display area 11 so that a trend graph is displayed in the data display area 11, and the return key 14 is operated by the return key 14. Is switched to the state before the display of the trend graph. That is, when the operator wants to see a trend graph relating to a certain sensor terminal, the operator touches the trend display key 13 while the information relating to the sensor terminal is displayed on the display unit 5. The trend graph of the machine can be displayed in the data display area 11. For example, when the analog level of a certain sensor terminal reaches the second reference level and an alarm signal to that effect is output, the analog level of this sensor terminal is displayed in the data display area 11 as the second reference level. The fact that the level has been reached can be displayed. In this case, the operator sees this and touches the trend display key 13 to switch the display of the data display area 11 to the trend graph display, thereby displaying the trend graph of the sensor terminal in the data display area 11. it can. By touching the return key 14 after viewing the trend graph, the display state of the data display area 11 can be switched to the original state.

In this embodiment, the trend display key 13 and the return key 14 are always displayed on the display unit 5 and can be operated at any time to display a trend graph at any time. It is possible. More specifically, when the display timing of the trend graph in the present embodiment is compared with the display timing of the trend graph in the related art described above, in the related art, the trend switch display corresponding to the trend display key 13 outputs a pre-alarm. Therefore, the trend graph is displayed after the pre-alarm is output.
If information on one sensor terminal is displayed on the display unit 5, the trend graph of that sensor terminal can be displayed at any time. That is, in this embodiment, the trend graph can be displayed when the trend display key 13 is operated by the operator, and therefore, it can be displayed at any time desired by the operator. Therefore, it can be displayed when the second reference level is reached, or can be displayed before the second reference level is reached. Moreover,
It can also be displayed when the first reference level (fire level) is reached.

In the present embodiment, the central device 1
When a trend graph relating to one sensor terminal is displayed, a trend graph (hereinafter, referred to as a “proximity sensor terminal”) based on analog data from another sensor terminal having a close relationship with the sensor terminal (hereinafter, referred to as a proximity sensor terminal). (Referred to as a nearby trend graph) can also be displayed in the data display area 11 by being superimposed on the trend graph.

As the nearby terminal having a close relationship with the sensor terminal, for example, a sensor terminal having a close position with respect to the sensor terminal can be used. Alternatively, sensor terminals closely related to each other may be used. More specifically, for example, as disclosed in Japanese Patent Publication No. 2-30555, the sensor terminals D-1 to D-n are grouped into a plurality of groups, and the sensor terminals in one group It can be treated as a proximity sensor terminal. FIG. 3 shows an example in which nine sensor terminals arranged in the same room are grouped as one group. This grouping can be easily realized by providing, for example, a comparison table between the addresses of the sensor terminals and the group numbers on the central device 1 side. The comparison table is, for example, the memory 4
Should be registered in advance. Thus, in the example of FIG. 3, a certain sensor terminal, for example, the proximity sensor terminal of D2 is defined as D-1, D-3 to D-9, and the sensor terminal, for example, the proximity sensor of D4. Terminal is D
-1 to D-3 and D-5 to D-9.

Instead of uniquely defining the proximity sensor terminal as in the example shown in FIG. 3, the user can arbitrarily define the proximity sensor terminal independently. In any case, when a nearby sensor terminal is defined for a certain sensor terminal, it is preferable to register this relationship in the memory 4 or the like using a comparison table or the like.

The proximity key 15 is displayed when information on a certain sensor terminal is displayed on the display unit 5 when a proximity sensor terminal is registered for this sensor terminal. And the trend display key 1
When the proximity key 15 is operated in a state where the trend graph of the sensor terminal is displayed in the data display area 11 by 3, the proximity trend graph of the proximity sensor terminal is superimposed on the trend graph and displayed. It has become. When the proximity key 15 is operated,
When the neighborhood key 15 is further operated in this state, the neighborhood key 15 is turned off, the reverse trend display or the blink display disappears, and the neighborhood trend graph disappears, and only one trend graph is displayed. Return.

The neighborhood trend graph may be similar to the trend graph, or may be a simplified version of the trend graph. For example, when the trend graph is a time change of analog data from the sensor terminal or a fire prediction curve, the neighborhood trend graph may be a time change of analog data from the proximity sensor terminal or a fire prediction curve. , May be thinned out at regular time intervals. Further, a difference value or the like between analog data from the sensor terminal and analog data from the nearby sensor terminal may be used as a nearby trend graph. In any case, in order to display the trend graph and the neighborhood trend graph, it is necessary to store analog data from all sensor terminals in the memory 4 for each sensor terminal. In addition,
For example, even when displaying only a fire prediction curve or the like as disclosed in Japanese Patent Application Laid-Open No. Hei 12-12398, it is necessary to store analog data of all sensor terminals.
Even in the case where the neighboring trend graph is displayed so as to be superimposed on the trend graph as in the present invention, almost the same memory capacity as when only the trend graph is displayed is required.

For example, the central processing unit 2 of the central unit 1
All the sensor terminals D-1 to D-n perform one polling at a cycle of 3 seconds, collect analog data from all the sensor terminals, and once every two polls (that is, 6 seconds). The analog data from all the sensor terminals can be stored in the memory 4 as analog data for the trend graph for each sensor terminal. However, in order to save memory capacity, it is appropriate that the retention period of the analog data for the trend graph from each sensor terminal is several minutes (for example, about 5 minutes) retrospectively from the present time.

Alternatively, separately from this, the maximum and minimum values of the analog data from each sensor terminal for one hour may be set in the past 2
The data can be stored in the memory 4 for four hours and used as analog data for the trend graph, or the maximum and minimum values of analog data from each sensor terminal per day can be stored in the memory 4 for the past 30 days. However, this can also be used as analog data for the trend graph.

The memory 4 may store only one of the three types of analog data for the trend graph having different time widths of the past 5 minutes, the past 24 hours, and the past 30 days. Alternatively, all three types may be stored, and any one of them may be selected and displayed.

In the following, for convenience of explanation, the neighborhood trend graph is similar to the trend graph.
It is assumed that the display is performed based on the trend graph analog data of the past about 5 minutes.

The previous report key 16 and the next report key 17 are used when a trend graph is displayed when an alarm signal or an alarm signal is output, and a certain sensor terminal is used. An alarm signal or an alarm signal is output based on data from the device, and the trend graph of this sensor terminal is displayed, or this trend graph is superimposed on the proximity trend graph of the proximity sensor terminal. When displayed,
It is provided to display in the data display area 11 a trend graph of the sensor terminal that has output the alarm signal or the alarm signal immediately before or after the sensor signal that has output the alarm signal or the alarm signal. ing. Specifically, when the previous report key 16 is pressed,
The display switches to display the trend graph of the sensor terminal that previously output the alarm signal or the alarm signal, and when the next report key 17 is pressed, the trend of the sensor terminal that outputs the alarm signal immediately after is pressed. It switches to display a graph. Also,
At this time, when the proximity key 15 is operated, the proximity trend graph is also superimposed and displayed. That is, by operating the previous report key 16 and the next report key 17, the trend graphs of all the sensor terminals are displayed.
Furthermore, the neighborhood trend graph can be seen.

Next, the operation of the fire alarm device having such a configuration will be described. For example, the central processing unit 2 of the central unit 1 calls each of the sensor terminals D-1 to Dn cyclically and sequentially by address polling or the like according to a control program stored in the memory 3, and calls the called sensor terminal. When analog data such as smoke and temperature is returned from the machine, the analog data is arithmetically processed to determine a fire or the like. At that time, for example, one sensor terminal, for example, D
When the analog data from -3 is lower than, for example, the first reference level (fire level) but reaches the second reference level, an alarm signal is output and the data display area of the display unit 5 is displayed. 11 shows that the analog data of the sensor terminal D-3 has reached the second reference level. Looking at this display, the operator presses the trend display key 1
When the user presses the button 3, the central processing unit 2 sends the sensor terminal D-
In order to display the trend graph of No. 3, the memory 4 is accessed, and the analog data for the trend graph of the sensor terminal D-3 is read out from the memory 4 and given to the display unit 5.
As a result, the data display area 11 of the display unit 5 is switched to the display of the trend graph, and as shown in FIG. A trend graph TG1 indicating a time change is displayed. In this example, the sensor terminal D-3 is an analog sensor for detecting smoke density, and therefore, the vertical axis of the trend graph TG1 is an analog level of smoke density (% / m).

The central processing unit 2 checks whether or not a nearby sensor terminal is registered with respect to this sensor terminal D-3 by using a comparison table or the like. For example, when D-2 is registered as the proximity sensor terminal), the proximity key 15 is displayed on the display unit 5. When the operator operates the proximity key 15 in a state where the trend graph TG1 of the sensor terminal D-3 is displayed, the central processing unit 2 further accesses the memory 4 to access the proximity sensor of the sensor terminal D-3. The analog data for the trend graph of the sensor terminal D-2 registered as the terminal is read out from the memory 4 and given to the display unit 5. As a result, as shown in FIG. 5, the sensor terminal D-3 is displayed in the data display area 11 of the display unit 5.
With the trend graph TG1 of this, this sensor terminal D
The trend graph of the sensor terminal D-2 having a relationship close to −3, that is, the proximity trend graph TG2 can also be superimposed and displayed.

By superimposing and displaying the neighborhood trend graph on the trend graph, it is possible to easily compare analog data outputs at the same time from the sensor terminals having a close relationship with each other. Can be performed accurately. For example, in both the trend graph TG1 of the sensor terminal D-3 and the proximity trend graph TG2 of the proximity sensor terminal D-2,
When the analog level tends to increase with time, it can be reliably determined that an abnormality has occurred.
In contrast, the trend graph TG of the sensor terminal D-3
1, the analog level increases with time, but the proximity trend graph TG of the proximity sensor terminal D-2.
In 2, when the analog level does not rise or rises very little, it can be determined that the possibility of malfunction of the sensor terminal D-3 is high. In this way, by superimposing and displaying the proximity trend graph of the proximity sensor terminal, even if one sensor terminal malfunctions due to aging or the like, the proximity of the proximity sensor terminal can be reduced. Accurate fire judgment can be performed with reference to the trend graph, and the surrounding situation can be grasped.

Further, when the trend graph of a certain sensor terminal and the proximity trend graph of the proximity sensor terminal are displayed, when the advance report key 16 is pressed,
For example, a trend graph of a sensor terminal that has output an alarm signal immediately before the sensor terminal that has output an alarm signal can be displayed in the data display area 11, and when the next report key 17 is pressed, The trend graph of the sensor terminal that has output the alarm signal one time after the sensor terminal that has output the alarm signal can be displayed in the data display area.
By sequentially operating 7, the trend graphs of all the sensor terminals that have output the alarm signal can be displayed.

In the above example, when the analog data reaches the second reference level and an alarm signal is output, the trend display key 13 is operated to operate the sensor whose analog data has reached the second reference level. The trend graph of the terminal is described as being displayed. However, when the analog data reaches the first reference level and an alarm is issued, the trend display key 13 is operated to operate the sensor terminal which has issued the alarm. You can also display a trend graph. Or,
At any time before the analog data reaches the second reference level, the trend display key 13 can be operated to display a trend graph. For example, when it is desired to perform maintenance and inspection, the trend display key 13 can be operated to perform maintenance and inspection of each sensor terminal. At this time, that is, at the time of maintenance and the like, if the trend graph of one sensor terminal is superimposed and displayed together with the trend graph of one sensor terminal, the state of each sensor terminal can be compared at the same time. The terminals can be easily compared with each other, and maintenance and inspection can be performed more easily and more accurately.

By the way, as shown in FIG. 5, together with the trend graph TG1 of a certain sensor terminal D-3, the proximity trend graph TG2 of the proximity sensor terminal D-2 closely related to the sensor terminal D-3. Are superimposed and displayed, the sensor terminal D-3 and the proximity sensor terminal D-
When the two types (smoke, temperature, etc.) are exactly the same,
The vertical axes of the trend graph TG1 and the neighborhood trend graph TG2 are common to each other, and as shown in FIG.
(In the example of FIG. 5, the smoke density (% / m) is sufficient. However, when the type of the proximity sensor terminal D-2 is different from the type of the sensor terminal D-3, the trend graph TG1
When only the scale is displayed, it becomes difficult to quantitatively grasp the analog data based on the neighborhood trend graph (for example, TG2). Therefore, in this embodiment, when the type of a certain sensor terminal and the proximity sensor terminal are different, when the proximity trend graph is superimposed and displayed on the trend graph, the proximity sensor terminal The scale suitable for the machine is also displayed.

Specifically, one sensor terminal D-
3 is a type of smoke detection, and when the proximity sensor terminal D-3 having a close relationship with the smoke detection type is of the type of temperature detection, the trend graph TG1 includes the proximity trend graph TG2.
Are displayed in a superimposed manner, as shown in FIG.
Scale M1 for the trend graph TG1 (smoke density (% /
m)), a scale M2 (temperature (° C.)) for the neighborhood trend graph TG2 is also displayed. Thereby, even if the type of the proximity sensor terminal D-2 is different from the type of the sensor terminal D-3, it is easy to quantitatively grasp the analog data based on both the trend graph TG1 and the proximity trend graph TG2. Become.

Further, in this case, the type of the proximity sensor terminal can also be displayed in the data display area 11. In FIG. 6, when the type of the proximity sensor terminal D-2 is a constant temperature sensor, a display B to that effect is further displayed in the data display area 11. As a result, it is possible for the operator to easily determine the type of the proximity sensor terminal, and it is possible to prevent a comprehensive determination error. Even when the type of the proximity sensor terminal is the same as the type of the sensor terminal, the type of the proximity sensor terminal can be made clear by displaying the same.

In the above embodiment, the trend display key 13 is always displayed on the display unit 5. However, as in the prior art, the trend display key 13 is displayed when a pre-alarm is output. It is also possible to configure so that However, in this case, the trend graph cannot be displayed until after the pre-alarm is output. On the other hand, when the trend display key 13 is always displayed and is always operable, the trend graph can be displayed at any desired time as described above. An excellent effect that the trend graph can be used for maintenance and the like can be obtained.

In the above embodiment, the display unit 5 is a touch panel display.
It may be configured by a T display or the like, and instead of touching the trend display key 13 with a finger, it is also possible to point and operate with a pointing device such as a mouse. Alternatively, the trend display key 13 and the like can be separately provided not on the display unit 5 but on an input device such as a keyboard. Further, a color display may be used for the display unit 5 so that the trend graph and the neighboring trend graph may be displayed in different colors. When a color display is not used for the display unit 5, the trend graph may be displayed by a solid line, and the neighboring trend graph may be displayed by a broken line, for example, so as to distinguish each other.

[0039]

As described above, according to the first and second aspects of the present invention, when a trend graph of a certain sensor terminal is displayed, a relationship close to the trend graph of the sensor terminal is displayed. Can be displayed in a superimposed manner, so that it is easy to compare outputs at the same time, so that one sensor terminal may malfunction due to aging or the like. In such a case, it is possible to accurately and easily make a fire judgment, etc. by referring to the trend graphs of other sensor terminals that are close to the sensor terminal, and accurately grasp the surrounding conditions. can do.

According to the third aspect of the present invention, when the trend graph of a nearby sensor terminal is superimposed and displayed on the trend graph of a certain sensor terminal, the type of the nearby sensor terminal is changed to the type of the sensor terminal. If it is different from the above, the scale suitable for the proximity sensor terminal is also displayed, so that the data of the proximity sensor terminal can be quantitatively grasped.

According to the fourth aspect of the present invention, when a trend graph of a nearby sensor terminal is superimposed and displayed on a trend graph of a certain sensor terminal, the type of the nearby sensor terminal is also displayed. It is possible to easily determine the type of the proximity sensor terminal, and to prevent a total determination error.

According to the fifth aspect of the present invention, the trend graph can be displayed at any desired time, so that not only fire judgment but also maintenance and inspection of the sensor terminal can be easily and accurately performed. it can.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an embodiment of a fire alarm device according to the present invention.

FIG. 2 is a diagram illustrating an example of a screen configuration of a display unit.

FIG. 3 is a diagram illustrating an example of defining a proximity sensor terminal.

FIG. 4 is a diagram showing a state in which only a trend graph of one sensor terminal is displayed.

FIG. 5 is a diagram showing a state in which a trend graph of a neighboring sensor terminal is superimposed and displayed on a trend graph of one sensor terminal.

FIG. 6 is a diagram showing a state in which a trend graph of a neighboring sensor terminal is superimposed and displayed on a trend graph of one sensor terminal.

FIG. 7 is a configuration diagram of a conventional fire alarm device.

[Explanation of symbols]

 1 Central unit 2 Central processing unit 3, 4 Memory 5 Display unit 6 Alarm output unit 7 Transmission path 11 Data display area 12 Message display unit 13 Trend display key 14 Return key 15 Nearby key 16 Previous report key 17 Next report key D-1 To Dn sensor terminal TG1, TG2 Trend graph

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Kiyoshi Aizawa 1-11-6 Hatagaya, Shibuya-ku, Tokyo Inside Nittan Co., Ltd. (56) References JP-A-2-12398 (JP, A) JP-A-3 -215889 (JP, A) JP-A-3-263196 (JP, A) JP-A-5-298573 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) G08B 17/00 G08B 23/00

Claims (5)

(57) [Claims] In a fire alarm device in which a plurality of sensor terminals are connected to a transmission path and process data from the plurality of sensor terminals to determine a fire or the like, a display capable of displaying a trend graph of the sensor terminals. Means for displaying a trend graph of a certain sensor terminal, and displaying a trend graph of a nearby sensor terminal having a close relationship with the sensor terminal on the trend graph of the sensor terminal when displaying the trend graph of the certain sensor terminal. A fire alarm device characterized by the following. 2. The fire alarm device according to claim 1,
Each of the plurality of sensor terminals further includes a registration unit that can register a sensor terminal having a close relationship with the sensor terminal as a nearby sensor terminal, and the display unit includes a trend graph of the certain sensor terminal. When the proximity sensor terminal is registered for the sensor terminal at the time of displaying, the trend graph of the proximity sensor terminal can be superimposed and displayed on the trend graph of the sensor terminal. Fire alarm device. 3. The fire alarm device according to claim 1, wherein when a trend graph of a nearby sensor terminal is superimposed and displayed on a trend graph of a certain sensor terminal, the type of the nearby sensor terminal is a sensor. A fire alarm device characterized in that when the type is different from the terminal type, a scale suitable for the proximity sensor terminal is also displayed. 4. The fire alarm device according to claim 1, wherein the trend graph of the proximity sensor terminal is superimposed and displayed on the trend graph of the certain sensor terminal. A fire alarm device characterized in that the type of the fire alarm is also displayed. 5. The fire alarm device according to claim 1,
The fire alarm device is characterized in that the trend graph can be displayed at any desired time.