JPH02105298A - Fire alarm device - Google Patents

Abstract

PURPOSE:To reduce the possibility of the erroneous information in a fire monitoring system by using a means which changes the fire deciding reference based on a sensor level and operating a non-fire information confirming means based on the human decision to change the contents of the erroneous information. CONSTITUTION:In case a fire sensor DE works and a non-fire state is decided by a man, the set fire deciding reference is changed based on an alarm level and/or the cumulative time. In this case, a non-fire confirming switch SW1 is turned on before a restoring switch SW2 is turned on. Thus the data on a non-fire alarm phenomenon is analyzed in terms of software. Then the fire deciding reference is changed so that the second erroneous information on the fire is prevented. While and alarm level setting switch SW11 or a cumulative time count switch SW12 is operated before the operation of the SW1. Thus the corresponding information is set or designated.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is applicable to a receiving section of a fire receiver, a repeater, etc., and to the receiving section. Regarding fire alarm devices, which consist of a fire detector connected to a V number and make a fire judgment by detecting physical quantities based on fire phenomena such as heat, smoke, or gas, it is especially important to effectively prevent non-fire alarms. The present invention relates to such a fire alarm system that enables the following.

[Prior Art and Problems] This system consists of a receiving section such as a fire receiver and/or a repeater, and a plurality of fire detectors connected to the receiving section, and is based on fire phenomena such as heat, smoke, or gas. In a fire alarm device that detects a physical quantity and makes a fire judgment, when a fire detector generates an alarm and outputs a fire signal, a human determines whether there is an actual fire or not. For fire detectors that generate many non-fire alarms, it is preferable to readjust the fire discrimination criteria for determining fire to avoid false alarms as much as possible. Since the sensor level of the fire detector during non-fire alarm conditions is unknown, sensitivity adjustments must be made based on estimates, and therefore, such adjustments cannot be easily made. . Moreover, as a fire discrimination criterion, is the predetermined time period after the sensor level exceeds a predetermined alarm level? In the case of a fire alarm system that determines a fire after seven seedling hours have elapsed, such adjustment is even more difficult. There was no effective way to do so.

[Means and effects for solving the problem] The present invention has been made to eliminate the above-mentioned conventional drawbacks, and is composed of a fire detector and a receiver, or a fire detector, a repeater, and a receiver. In the fire alarm system, which is operated by a human, when it is determined that the fire is not a fire, the fire discrimination criteria should be changed based on the number of non-fire alarms, etc. When the "non-fire alarm confirmation means" is operated, the non-fire alarm confirmation means J is installed at one of the locations in the system.

Specifically, according to the first aspect of the present invention, the fire discrimination standard of the fire detector that outputs the non-fire alarm fire signal is automatically changed based on the detected sensor level.9 Specifically, according to the first aspect of the present invention. , a receiving section;
It consists of a plurality of fire detectors connected to the receiving section, and detects a fire by comparing the sensor level of the physical quantity related to the fire phenomenon detected by each of the fire detectors at predetermined time intervals with the respective fire discrimination criteria. In fire alarm systems that make decisions.

When it turns out that the fire signal from the fire detector that made the fire judgment is a false alarm, the non-fire If confirmation means operated by human judgment and the non-fire alarm confirmation input from the non-fire alarm confirmation means are used. There is provided a fire alarm device comprising: a setting change means for changing the settings of the fire discrimination criteria based on the sensor level.

In this case, if the fire discrimination standard to be changed is the alarm level, for example, the current alarm level should be changed to 1.
The setting may be changed by incrementing the unit, etc.

According to a second specific aspect of the present invention, in the fire alarm device of the first aspect, the fire discrimination criteria include an alarm level with which the sensor level is compared, and an alarm level at each predetermined time interval. and a MM time count in which the time that the detected sensor level is continuously at or above the alarm level is compared, where the sensor level continues to be at or above the alarm level for the accumulated time count. The non-fire alarm confirmation means includes an alarm level setting change designation means operated when the alarm level is to be changed, and the accumulation time count. NvT time count setting change designating means that is operated when attempting to change the setting of the fire alarm system.

As a result, if the non-fire confirmation means is operated when it is determined that there is no fire, the alarm level and/or accumulated time count of the fire detector that outputs the non-fire alarm signal will be automatically changed. . In this case, the alarm level and/or accumulation time count may be reconfigured in such a way as to increment their respective current values by, for example, one.

According to a third specific aspect of the present invention, the second Rl
The fire alarm device according to a.a includes a storage area for storing sensor levels above the alarm level in order to measure the time at which the alarm level is above the alarm level, and the alarm level setting change designating means and/or the above. A fire alarm device is provided in which, when the accumulation time count setting change specifying means is operated, the setting change means changes the setting of the alarm level and/or the accumulation time count based on the contents of the storage area.

As a result, if the non-fire alarm confirmation means is operated when it is determined that the fire discrimination criteria should be changed based on the number of non-fire alarms, etc., the non-fire alarm confirmation input is given to the fire alarm device. As a result, the alarm level and MW1 hour count of the sensor that caused the non-fire alarm are appropriately set, taking into consideration the sensor level and duration above the alarm level stored in the storage area. In this way, it is possible to prevent non-fire alarms from occurring.

According to the present invention, upper and lower alarm levels and upper and lower accumulated time counts are set, and the settings are changed only when the alarm level and accumulated time count to be changed are within the respective upper and lower limits. A fire alarm system is also provided that allows the fire alarm to be activated.

The non-fire alarm confirmation means can be installed in any of the fire detectors, repeaters, and fire receivers, and when installed in the fire detector, the fire detector itself reads this signal and automatically detects it. Modify the alarm level and/or accumulation time automatically.

In a system in which a fire signal is sent out from an analog fire detector and a fire signal is determined by a receiver such as a repeater or fire receiver, if the repeater or fire receiver is equipped with this non-fire alarm confirmation means. In this case, the alarm level and/or accumulated time count for all fire detectors stored in the fire receiver or repeater are modified to appropriate values for each fire detector individually.

[Example] Hereinafter, one embodiment of the present invention will be described based on the drawings.

Figure 1 shows a block circuit diagram of an on/off type fire alarm system when a fire detector is equipped with a non-fire alarm confirmation switch. In the figure, RE is a fire receiver and DE is a pair of A plurality of fire detectors are connected to a fire receiver RE via power and signal lines.

In the fire detector DE, MPU is a microprocessor, ROM1 is a storage area for programs, and ROM2 is a storage area that stores an alarm level table of an upper limit alarm level and a lower limit alarm level, which will be described later. The format of the storage area ROM2 is shown in FIG. 2(A), and its starting address AL
The upper limit alarm level is stored in AD, and the lower limit alarm level is shown stored in the second address (ALAD+1).

The ROM 3 is a storage area that stores an accumulation time table of an upper limit accumulation time count and a lower limit accumulation time count, which will also be described later. The format of the storage area ROM3 is shown in FIG. 2(B), and its starting address is 5TAD.
The upper limit accumulation time count is stored in , and the lower limit MW (time count is stored in the second address (STAD+1) as shown).

RAM1 is a work area, and RAM2 is a storage area for used alarm levels that stores used alarm levels used as fire discrimination criteria.
have.

RAM3 is a storage area for counting usage accumulation time which is also used as a fire discrimination standard, and is located at address C3 as shown in FIG. 2(D).
It has TAD.

RAM4 detects fire phenomenon detection means F at predetermined time intervals.
This is a sensor level (sensor level) storage area for sequentially storing sensor levels read from S when the sensor levels are continuously equal to or higher than the used alarm level, and the 27th (sensor level) storage area is As shown in E), the first address LVAD stores the number of data, that is, the number of sensor levels stored up to the present that are continuously at or above the used alarm level, and from the second address,
Actual values of sensor levels that are continuously higher than the alarm level used are stored in sequence. Therefore, from the number of data in the first address, the sensor level continuously exceeds the alarm level used as a fire discrimination criterion. It is possible to know the amount of time that has been exceeded, that is, the accumulated time count. Fire discrimination can be performed by comparing the value of this accumulation time count with the usage accumulation time count as a fire discrimination standard.

FS is a fire phenomenon detection means that detects a physical quantity based on a fire phenomenon such as heat, smoke, or gas and outputs a sensor level, and AD is a fire phenomenon detection means that converts an analog signal output from the fire phenomenon detection means FS into a digital signal. Analog-to-digital converter, SWl is a non-fire alarm confirmation switch, SW++ is an alarm level setting switch, S
W l 2: im time count setting switch, S
W, fire recovery switch, Tr? X is a fire signal sending unit, Ir'l, IF2 and IF3 are interfaces.

1st r5! The operation of I will be explained with reference to the flowcharts from FIG. 3 onwards.

(i) Operation in normal state In FIG. 3, the operation at power-on or initial setting in steps 301 to 305 will be explained first. Second address (ALAD+
The lower limit alarm level is read from step 4) (step 3).
01), it is the storage area RAM2 at address CALAD.
is stored as the used alarm level v0 (step 303), and is stored at the second address (S T
The lower limit accumulation time count is read from A D+1 (step 302), and it is set as the used accumulation time count Vl in the storage area RAM3 at address C3TAD (step 304), after which the sensor level storage area RAM4 is cleared. At the same time, the interface IF3 for fire signal output is cleared (step 305).
, This completes the initial wI setting operation.

In a normal monitoring state, first, the sensor level detected by the fire phenomenon detection means FS at predetermined time intervals is read as v2 via the analog-to-digital converter AD, and the used alarm level is read from the storage area RAM2. v
0 (step 306), and the number V1 of sensor level data above the alarm level stored at the start address of the sensor level storage area RAM4.
, and the usage accumulation time count v from the storage area RAM3 are read (step 307).

In step 308, the sensor level V2 read in step 306 and the used alarm level ■. Further, in step 309, the number of data items (4) read in step 307 is compared with the usage accumulation time count V1. Under normal conditions, sensor level V2 is smaller than alarm level Vo (
N of step 308), therefore, the number of sensor levels equal to or higher than the used alarm level stored in the first address of the storage area RAM4, that is, the number of data pieces V.

is also smaller than the usage accumulation time count V, which is the discrimination criterion (N in step 309), which means that there is no abnormal condition, so the sensing 2 level storage τ area R
AM4 is cleared (step 310) and the process goes to step 401 in FIG. In step 401 of FIG. 4, the data V of the input interface IF2 is read, and if there is no signal input from the switches SW1 and SW2, that is, if ■5=0 (Y in step 402),
After a predetermined time interval for sensor level input (
Step 403), returning to step 306, the next new sensor level is read again from the analog-to-digital converter AD, thus continuing the fire monitoring.

(ii) Operation when a fire occurs Read data v2 from the fire phenomenon detection means FS via the analog-to-digital converter AD (step 306);
Compare with the used alarm level v0 (step 308)
, input data ■2 has a higher level, step 30
The value obtained by adding 1 to the number of data (2) read in step 307 is compared with the usage accumulation time count vl also read in step 307 (step 311).

If the number of sensor levels v4 with a usage alarm level of 70 or higher is added to 1, that is, the accumulated time count is the usage accumulated Wt time count V as the fire discrimination criterion.
If it is greater than or equal to 1 (Y in step 311), this means that the sensor level v2 is at the usage alarm level ■ for the time indicated by the usage accumulation time count ■1. In this case, by writing a fire signal to the fire signal output interface IF3,
A fire signal is sent from the fire signal sending unit TRX to the fire receiver RE (step 312).

If the digit storage time count (V, +1) is less than the usage storage time count V1 (N in step 311), the usage alarm level ■ is set in step 308 for further monitoring. The sensor level v that has just been determined to be above
2, the sensor level storage room tI! At the same time as storing the data in the RAM 4, an operation is performed to increment the number of data items stored at the start address of the storage area RAM 4 by one (step 313).

That is, the starting address LVA D of the storage area RAM4
(Vs), the number of data stored at the address v4 and 1, the first address in the storage area RAMJ where no sensor level is stored is obtained, so the sensor level is stored there. ■In addition to storing 2,
The contents of the start address are updated with V4+1.

Suppose that the sensor level V2 of the fire detector, which is read at predetermined time intervals, becomes the used alarm level ■.

(N in step 308), the usage accumulation time count V and the number of data in the sensor level storage area ■ are compared, and if the former is larger (N in step 309), the accumulation time count for fire monitoring is The sensor level storage area is cleared to stop the sensor level storage (step 310).

(iii) Setting change of fire discrimination criteria by non-fire alarm confirmation input When the fire detector DE is activated and it is confirmed by human judgment that it is a non-fire alarm, the alarm level and/or accumulation time If it is determined that it is necessary to change the setting of the fire discrimination criteria, the non-fire alarm confirmation switch SW1 is turned on before the recovery switch SW2 is turned on. It is possible to prevent similar non-fire alarms from occurring again by analyzing them using software.

Before the non-fire alarm confirmation switch SWl is operated,
Either the alarm level setting switch SW, the M product time count setting switch SW, t, or both switches are operated. As a result, when the non-fire alarm confirmation switch SW1 is operated thereafter, the switch S
In response to the operation of W and/or SW, 2, the alarm level and/or accumulation time are set or specified.

In FIG. 4, when a non-fire alarm confirmation input is input, data V is first read from the input interface IF2,
A check is made as to which elements of the usage alarm level and/or the usage 11 cumulative time count should be changed (step 401).

Data V read from input interface IP2
The format of No. 5 is shown in FIG. 4A, where the most significant bit A is turned on or set to "1" when the alarm level setting switch SW, is operated;
The second bit A2 is the accumulation time count setting switch S
It is turned on or set to "1" when W l 2 is operated. The second bit A from the bottom is turned on or rl when there is a non-fire alarm confirmation input, that is, when the non-fire alarm confirmation switch SW is operated.
”, indicating that the usage alarm level and/or usage accumulation time count should be changed according to bit A and/or At being turned on.

Finally, the least significant bit B is turned on or set to "1" when the fire recovery switch SW is operated,
Indicates that fire recovery should be performed.

a) Usage alarm level and usage accumulation time]・
When it is determined that bit A of data ■ and both bits A1 and A2 are on (N in step 402 and Y in steps 404 to 406), block 5
The setting program 1 indicated by 00 performs an operation to change the setting of both the usage alarm level and the usage accumulation time.

Details of the configuration program 1, indicated by block 500, are shown in FIG. In FIG. 5, first, the parameter reading program 80 shown in detail in FIG.
0, the alarm level table storage area RO
From M2, the upper limit alarm level is set to ■6, the lower limit alarm level is set to v7 (step 801), and
From the storage area ROM3 of the storage time table, the upper limit 1m time count is Vs, and the lower limit storage time count 1- is ■.

(step 802), and the usage alarm level from the storage area RAM2 is set as vo (step 801).
), the usage accumulation time count from storage area RAM3 is V,
(step 802), and further sensor level storage W
Assuming that the start address of I area RAM 4 is ■ (step 8
03), respectively.

Note that this parameter reading program 800 is executed in exactly the same program at the beginning in the setting program 2 and setting program 3, which will be described later.

Once the necessary data has been read by the parameter reading program 800, the sensor level storage area RAM
The number of data V stored at the first address V of No. 4 is compared with the accumulated usage time count v1, and if the former value v4 is lower (N at step 503), the sensor DE
Since it is not operating yet, there is no need to change it, so go back to FIG. 4 to clear the sensor level storage area RAM4 (step 410), and after waiting for the input time for the sensor (step 403), return to the original routine. Return to ■.

If the former value V is large, that is, if the accumulated time count 2 exceeds the used M accumulated time count v1 (Y in step 503), the sensor is operating, which means that the sensing 3DE is not operating. , which means that the non-fire alarm confirmation switch SW1 was operated with the judgment that it was a false alarm and that the settings should be changed. Therefore, follow the steps below to check the alarm level and/or accumulation of usage. The time count setting is changed. The idea behind changing settings in this case is to slightly increase the used alarm level in order to make false alarms less likely to occur, and then set the slightly increased value as the new alarm level. This is to calculate the value of the used MW time count that should be used from the contents of the sensor level storage areas R and AM4.

First, use the alarm level■. step up by 1 and bind vl (step 505), compare the ■ with the upper limit alarm level ■6 (step 506), v,
, exceeds the upper alarm level ■, (N in step 506), use the alarm level ■. Since the settings cannot be changed, only the usage accumulation time count is changed.

The usage accumulation time count V1 is changed by adding 1 to the number of data items determined to be 71 or more in step 503.
Multiply by a value β that is slightly larger than this multiplied value V,
This is to set ×β as a new usage accumulation time count. Considering the process of setting the number of data V in steps 308 to 313, ■4 cannot actually become larger than ■ (because step 31
(If the fire signal is output in step 2, the data number V in the sensor level storage area RAM4 is not rewritten in step 313), and the new usage accumulation time count v, x β is calculated from the original 1. is also slightly larger.

Therefore, in step 507, V and xβ are compared with the upper limit accumulation time count v8, and in the following cases (y in step 507), v4xβ is set as the new usage accumulation time count. (Step 508), if it is larger than the upper limit accumulation time count (2) (N in step 507), the upper limit IWIvf count V is set as a new usage accumulation time count (
Ste Tsubu 509>.

Return to step 506 and set the usage alarm level v0 to 1.
If the step-up value V11 is less than the upper limit alarm level ■ (Y in step 506),
Setting changes are made to both the usage alarm level and the usage accumulation time count.

First, in steps 511 to 516, the sensor levels (used alarm level V0 or higher) stored in the sensor level storage area nAMd are read out one by one as VB, and each of V12 is successively read out as V(= V, +1) or more, the number of ■1□ is calculated as a new accumulation time count V1
Calculate as 3.

Record f! V stored in area RAMJ, (=■,
) If the number V13 of data that is consecutively 711 or higher has been calculated for all the sensor levels V12 (Y in step 513), then V13 is calculated as described above.
, koXβ×β〉1) is compared with the upper limit accumulation time count ■ (step 517), and if vlth×β is less than the upper limit accumulation time count ■ (N of step 517)
, V13Xβ as the new usage accumulation time count V14 (step 518) and Vll as the new usage alarm level (step 519).
).

If V, , Xβ is greater than the upper limit accumulation time count V (Y in step 517), step up V, H by +1 step (step 520), return to step 506, perform the same calculation, and perform (8). VlI and V when falling below
, 4 as the usage alarm level and usage accumulation time count.

b) Changing the setting of the used alarm level Returning to FIG. 4, when it is determined that only bit A of data 5 and A1 shown in FIG. 4A are on, N of step 402 and step Y of knobs 404-405
, step 406 (N), the setting program 2 shown in block 600 performs an operation of changing only the used alarm level.

Details of the configuration program 2, indicated by block 600, are shown in FIG. In step 6r21, once the necessary data has been read by the parameter reading program 800 described above, next steps 602 to 608 are executed.
The maximum value v1. of the sensor levels stored in the sensor level storage area RAM4. An action to search for is performed.

That is, first, the number of data stored in the first address V of the sensor level storage area RAM4 is read as 1 degree (step 602), and the first sensor level from the next address is read as V l 4. Read (step '603 >, and while decrementing the data number vlo by one (step 604), sensor level V+2
step 605), V, , <O(
Until it is determined that step 606 is Y),
Each read sensor level V,2 is set to the maximum f
a V l 4 (step 607
), sensor level maximum ff1v1. is required (
Step 608).

Once the maximum value of the sensor level ■I has been determined (Y in step 606), the maximum value V14 is compared with the upper limit alarm level V, and when it is less than ■6 (step 6
09 Y) The maximum value ■ is set as a new usage alarm level in the storage area RAM2.

If the maximum value V14 exceeds the upper limit alarm level ■, the original routine is returned to.

Note that the maximum value is not used as the new alarm level, but the difference between the maximum value and the current alarm level is 1
/x (where X is a real number of x>1) and the current alarm level can be added to the new alarm level.

C) Changing the usage accumulation time count setting Returning to FIG. 4, the data shown in FIG. 4A.

When it is determined that only bit A and bit A2 are on (N in step 402 and step 40
(Y in step 4, N in step 405), the setting program 3 shown in block 700 performs an operation to change the setting of only the used M load time count.

Details of the configuration program 3, indicated by block 700, are shown in FIG. In FIG. 7, once the necessary data has been read by the parameter reading program 800 described above, the number of pieces of data is read from the top address of the sensor level storage area RAM 4 as 1 degree (step 702), and the data The value obtained by multiplying the number V1o by β (β〉1)■1゜×β is the upper limit storage time count V, if it is less than (Y in step 703), the value v1゜×β is the new usage storage time count (step 704), and if it is larger than -1-limit accumulation time count (2), the upper limit M load time count V
Storage areas R and A with s as new usage accumulation time count
M3 (step 705).

(iv＞　Fire recovery Returning to FIG. 4, the data shown in FIG. 4A.

(N in steps 402 and 404, and Y in step 411)
, fire recovery operations are performed. That is, the sensor level storage area RAM4 is cleared and the fire signal interface IF3 is cleared (step 412).
, after waiting for a period of time (Stella 1403), the process returns to the original routine (2).

Fire recovery using this fire recovery switch is a recovery operation at the time of level setting, and normal recovery without level setting for an activated fire sensor is performed by a recovery switch (not shown) of the fire receiver RE. At this time, RAM
1 and RAM4 are cleared, but RAM2
, the storage contents of RAM3 are retained.

The above embodiment is an example in which the present invention is applied to a fire alarm device in which a fire detector performs fire discrimination and sends a fire signal and/or an address signal to a receiver. The detector is an analog type fire detector that sends out a physical quantity signal of the detected fire phenomenon, and a receiver or repeater is used to identify a fire based on the physical quantity signal sent from the analog type fire sensor. It is also possible to apply the present invention to an alarm device.

In this case, as shown in FIG. 1, the receiver RE is provided with a microprocessor MPU, and the fire detector DE is connected to the ROM1. ROM2, ROM3, RAM2, RAM3,
RAM4. and non-fire alarm confirmation switch SW, SW,
,, SW, □, SW2 are removed and these are received by the IRE.
Provided for. RAM2 to RAM4 are provided for the number of connected fire detectors DE, and in addition to the setting change program explained in the embodiment, the ROMI also polls the fire detector DE and detects a fire phenomenon from the called fire detector DE. Add a program to collect the sensor output level of means FS. In this case, the non-fire alarm confirmation switch SW1 provided in the receiver RE can be an operating section connected to the receiver 11qRE. Also, fire detector D
E determines whether or not a call has been received by polling or the like from the receiving vIRE, reads the physical quantity of a fire phenomenon such as heat or smoke from the fire phenomenon detection means FS when the call is received, and outputs a sensor output indicating this physical quantity. A ROM is provided that stores a program for sending the level to the receiving mfiRE.

[Effects of the Invention] According to the present invention, for example, when a false alarm is confirmed, the sensor level from the past can be stored by operating the non-fire alarm confirmation switch based on human judgment. Since the fire discrimination criteria can be automatically set and changed based on the contents of the storage area, there is an effect that the possibility of false alarms in subsequent fire monitoring can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a block circuit diagram showing a fire alarm system to which an embodiment of the present invention is applied, and FIG. 2 (A>, (13), (C))
, (D) and (E) are diagrams showing the contents of storage areas ROM2, ROM3, RAM2 to RAM4 shown in FIG. 1, FIGS. 3, 4, 4A, and 5r21 to 8, respectively. The figure is a diagram for explaining the operation of FIG. 1. In the figure, RE is fire reception 1N, DE is fire detector, FS
is the fire phenomenon detection means, and ROM 2 is the alarm level/
Table memory distribution 1! li, ROM3 is storage time table storage m area, RAM2 is usage alarm level storage m area,
RAM3 is a usage storage time count storage area, RAM4 is a sensor level storage T area, SW1 is a non-fire alarm confirmation switch, SW is an alarm level setting switch, and SW, 2 is a storage time count setting switch. Mochi 1:'[Applicant's representative Li Jinnomi Disaster Prevention Industry Co., Ltd. Zeng Wa Dao Diagram 2, Figure 2, Figure 7, Figure 7

Claims (3)

[Claims] (1) Consisting of a receiving section and a plurality of fire detectors connected to the receiving section, the sensor level of the physical quantity related to the fire phenomenon detected by each of the fire detectors is detected at predetermined time intervals. In a fire alarm system that determines a fire by comparing it with a fire discrimination standard, a non-fire alarm confirmation means operated by human judgment and a non-fire alarm confirmation input from the non-fire alarm confirmation means are used to detect a fire at the sensor level. A fire alarm device comprising: a setting change means for changing the settings of the fire discrimination criteria based on the content of the fire discrimination standard. (2) The fire discrimination criterion is that the alarm level with which the sensor level is compared and the sensor level detected at each predetermined time interval continue to match the alarm level.
an accumulated time count in which the time at which the sensor level is above the alarm level is compared, wherein the fire signal is output when the sensor level is continuously at or above the alarm level for the accumulated time count; The non-fire alarm confirmation means includes an alarm level setting change specifying means that is operated when attempting to change the setting of the alarm level, and an accumulation time count setting that is operated when attempting to change the accumulation time count. The fire alarm device according to claim 1, further comprising change designation means. (3) A storage area is provided for storing sensor levels above the alarm level in order to measure the time above the alarm level, and the alarm level setting change designating means and/or the accumulation time count setting. The fire alarm device according to claim 2, wherein when the change designation means is operated, the setting change means changes the settings of the alarm level and/or accumulation time count based on the contents of the storage area. .