JP2000194965A - Heat sensor, and heat sensing system provided with the same - Google Patents
Heat sensor, and heat sensing system provided with the sameInfo
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- JP2000194965A JP2000194965A JP10367987A JP36798798A JP2000194965A JP 2000194965 A JP2000194965 A JP 2000194965A JP 10367987 A JP10367987 A JP 10367987A JP 36798798 A JP36798798 A JP 36798798A JP 2000194965 A JP2000194965 A JP 2000194965A
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- threshold value
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、熱感知器に関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat detector.
【０００２】[0002]
【従来の技術】従来、この種の熱感知器として、図５に
示すものが存在する。このものは、環境の温度変化を計
測する温度計測手段A と、温度計測手段A により計測さ
れた温度計測データを記憶する記憶手段B と、記憶手段
B に記憶された所定時間前の過去の温度計測データと温
度計測手段A により計測された現在の温度計測データと
を比較して両温度計測データの差分値ΔＴを出力する比
較手段C と、比較手段Cにより出力された差分値ΔＴと
しきい値Ｌとの比較に基づいて注意信号を出力する判断
手段D と、を備えている。詳しくは、判断手段D は、比
較手段C により出力された差分値ΔＴがしきい値Ｌより
も高くなると、注意信号を出力する。2. Description of the Related Art Conventionally, there is a heat sensor of this type as shown in FIG. This includes a temperature measuring means A for measuring a temperature change in the environment, a storage means B for storing temperature measurement data measured by the temperature measuring means A, and a storage means.
A comparison means C for comparing the past temperature measurement data stored a predetermined time before stored in B with the current temperature measurement data measured by the temperature measurement means A and outputting a difference value ΔT between the two temperature measurement data; Determining means D for outputting an attention signal based on a comparison between the difference value ΔT output from the means C and the threshold value L. Specifically, when the difference value ΔT output by the comparing means C becomes higher than the threshold value L, the judging means D outputs a caution signal.
【０００３】一般に、火災の際、火災初期では、温度変
化量である差分値ΔＴは、僅かであるものの、火災が激
しくなってくると、温度変化量である差分値ΔＴが急激
に増加するので、このように、比較手段C により出力さ
れた差分値ΔＴがしきい値よりも高くなると、注意信号
を出力することでもって、火災による被害を少なくする
ことができる。[0003] Generally, in the event of a fire, the difference value ΔT, which is the amount of temperature change, is small at the beginning of the fire. As described above, when the difference value ΔT output by the comparing means C becomes higher than the threshold value, the warning signal can be output to reduce the damage caused by the fire.
【０００４】[0004]
【発明が解決しようとする課題】上記した従来の熱感知
器にあっては、暖房機器等の環境の温度を上昇させるよ
う駆動する熱源が近くに存在する場合、この熱源を駆動
させて環境温度を上昇させても、このときの温度変化
は、熱源を駆動して間もない時期では、温度変化量であ
る差分値ΔＴは、図６に実線で示すように、僅かである
ものの、駆動してある程度の時間がたってくると、火災
のときと同様に、温度変化量である差分値ΔＴが急激に
増加するので、比較手段C により出力された差分値ΔＴ
がしきい値Ｌよりも高くなり、タイミングＴ0 の時に、
いわゆる誤報と呼ばれる注意信号を出力してしまうこと
になる。In the above-described conventional heat sensor, when a heat source that drives the environment such as a heating device to increase the temperature of the environment is nearby, the heat source is driven to reduce the environmental temperature. When the heat source is driven shortly after driving the heat source, the difference value ΔT, which is the amount of temperature change, is small as shown by the solid line in FIG. When a certain amount of time has passed, the difference value ΔT, which is the amount of temperature change, sharply increases as in the case of a fire, so that the difference value ΔT
Becomes higher than the threshold value L, and at time T 0 ,
A warning signal called a so-called false alarm is output.
【０００５】本発明は、上記の点に着目してなされたも
ので、その目的とするところは、誤報を出力しにくい熱
感知器及びそれを備えた熱感知システムを提供すること
にある。The present invention has been made in view of the above points, and an object of the present invention is to provide a heat detector which does not easily output a false alarm and a heat detection system having the same.
【０００６】[0006]
【課題を解決するための手段】上記した課題を解決する
ために、請求項１記載の発明は、環境の温度変化を計測
する温度計測手段と、温度計測手段により所定時間前に
計測された過去の温度計測データと温度計測手段により
計測された現在の温度計測データとを比較して両温度計
測データの差分値を出力する比較手段と、比較手段によ
り出力された差分値としきい値との比較に基づいて注意
信号を出力する判断手段と、を備えた熱感知器におい
て、前記しきい値を高感度用の低しきい値又は低感度用
の高しきい値のいずれかに切り替えるしきい値切替手段
が設けられた構成にしてある。According to a first aspect of the present invention, there is provided a temperature measuring device for measuring a temperature change of an environment, and a past temperature measured by a temperature measuring device a predetermined time ago. Comparing means for comparing the temperature measurement data with the current temperature measurement data measured by the temperature measurement means and outputting a difference value between the two temperature measurement data, and comparing the difference value output by the comparison means with the threshold value Determination means for outputting an attention signal based on a threshold value for switching the threshold value to either a low threshold value for high sensitivity or a high threshold value for low sensitivity. The configuration is such that switching means is provided.
【０００７】請求項２記載の発明は、請求項１記載の発
明において、前記しきい値切替手段は、前記差分値が前
記低しきい値よりも低い所定値以下のときに前記しきい
値を前記高しきい値から前記低しきい値に切り替える構
成にしてある。According to a second aspect of the present invention, in the first aspect of the present invention, the threshold value switching means sets the threshold value when the difference value is equal to or less than a predetermined value lower than the low threshold value. It is configured to switch from the high threshold to the low threshold.
【０００８】請求項３記載の発明は、請求項１又は請求
項２記載のいずれかに記載の熱感知器と、環境の温度を
上昇させるよう駆動する熱源と、を備え、前記しきい値
切替手段は、熱源の駆動中に前記しきい値を前記低しき
い値又は前記高しきい値のいずれかに切り替える構成に
してある。According to a third aspect of the present invention, there is provided the heat sensor according to any one of the first and second aspects, and a heat source driven to increase the temperature of the environment, wherein the threshold value is switched. The means is configured to switch the threshold value to either the low threshold value or the high threshold value while driving the heat source.
【０００９】[0009]
【発明の実施の形態】本発明の第１実施形態を図１及び
図２に基づいて以下に説明する。この熱感知器10は、温
度計測手段1 、記憶手段2 、比較手段3 、判断手段4 、
しきい値切替手段5 を備えている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. The heat detector 10 includes a temperature measuring unit 1, a storing unit 2, a comparing unit 3, a determining unit 4,
Threshold switching means 5 is provided.
【００１０】温度計測手段1 は、環境の温度変化を計測
する。記憶手段2 は、温度計測手段1 により計測された
温度計測データを記憶する。比較手段3 は、記憶手段2
に記憶された所定時間前の過去の温度計測データと温度
計測手段1 により計測された現在の温度計測データとを
比較して、両温度計測データの差分値ΔＴを出力する。
判断手段4 は、比較手段3 により出力された差分値ΔＴ
としきい値との比較に基づいて注意信号を出力する。し
きい値切替手段5 は、しきい値を高感度用の低しきい値
Ｌ１又は低感度用の高しきい値Ｌ２Ｌ２のいずれかに切
り替える。[0010] The temperature measuring means 1 measures a temperature change of the environment. The storage unit 2 stores the temperature measurement data measured by the temperature measurement unit 1. The comparison means 3 is a storage means 2
Is compared with the past temperature measurement data stored a predetermined time ago and the current temperature measurement data measured by the temperature measurement means 1 to output a difference value ΔT between the two temperature measurement data.
The judging means 4 calculates the difference value ΔT output from the comparing means 3
And outputting a warning signal based on the comparison between the threshold value and the threshold value. The threshold switching means 5 switches the threshold to either the low threshold L1 for high sensitivity or the high threshold L2L2 for low sensitivity.
【００１１】次に、図２に基づいて、このものの動作を
説明する。例えば、暖房機器のような熱源を駆動させる
場合、この熱源の駆動開始に合せてタイミングＴ1 の時
に、しきい値切替手段5 により、しきい値を高感度用の
低しきい値Ｌ１から低感度用の高しきい値Ｌ２に切り替
えれば、熱源による環境温度の変化とともに変化する差
分値ΔＴを示す曲線としきい値を示す階段状の直線とが
交差することがなくなり、差分値ΔＴが、常にしきい値
よりも低くなるので、判断手段4 は、注意信号を出力し
なくなり、いわゆる誤報がなくなる。Next, the operation of this device will be described with reference to FIG. For example, the case of driving the heat source such as heating equipment, when the timing T 1 in accordance with the driving start of the heat source, the threshold changing unit, the threshold from low threshold L1 for high sensitivity low By switching to the high threshold value L2 for sensitivity, the curve indicating the difference value ΔT that changes with the change in the environmental temperature due to the heat source does not intersect with the step-like straight line indicating the threshold value. Since it is lower than the threshold value, the judging means 4 does not output a caution signal, so that a so-called false alarm is eliminated.
【００１２】かかる熱感知器10にあっては、しきい値
は、しきい値切替手段5 によって、高感度用の低しきい
値Ｌ１又は低感度用の高しきい値Ｌ２のいずれかに切り
替えるのであるから、例えば、暖房機器のような熱源を
駆動させるときに、高感度用の低しきい値Ｌ１から低感
度用の高しきい値Ｌ２に切り替えることにより、火災で
もないときに注意信号が出力されるというような、いわ
ゆる誤報を防止することができる。In the heat detector 10, the threshold value is switched by the threshold value switching means 5 to either the low threshold value L1 for high sensitivity or the high threshold value L2 for low sensitivity. Therefore, for example, when driving a heat source such as a heating device, by switching from the high-sensitivity low threshold L1 to the low-sensitivity high threshold L2, a caution signal is output when the fire is not a fire. It is possible to prevent so-called false information, such as output.
【００１３】次に、本発明の第２実施形態を図３に基づ
いて以下に説明する。本実施形態は、基本的には第１実
施形態と同様であるが、しきい値切替手段5 は、差分値
ΔＴが低しきい値Ｌ１よりも低い所定値以下となるタイ
ミングＴ2 の時に、しきい値を高しきい値Ｌ２から低し
きい値Ｌ１に切り替える構成になっていることが異なっ
ている。Next, a second embodiment of the present invention will be described below with reference to FIG. This embodiment is basically the same as the first embodiment, the threshold changing unit, when the timing T 2 in which the difference value ΔT is equal to or lower than a predetermined value lower than the low threshold L1, The difference is that the threshold value is switched from the high threshold value L2 to the low threshold value L1.
【００１４】詳しくは、所定値は、低しきい値Ｌ１の半
分の値となっている。なお、この所定値は、低しきい値
Ｌ１の半分の値に限るものではない。More specifically, the predetermined value is a half of the low threshold value L1. Note that the predetermined value is not limited to a half of the low threshold value L1.
【００１５】かかる熱感知器10にあっては、第１実施形
態の効果に加えて、例えば、暖房機器のような熱源を駆
動させている場合、所望の環境温度になると、熱源の駆
動状態が緩くなって、熱源による環境温度の温度変化量
である差分値ΔＴが小さくなるので、熱源によるさらな
る環境温度の上昇は略ないと考えられるので、このよう
なときの環境温度の上昇は、火災によるものと推定で
き、しきい値を低感度用の高しきい値Ｌ２から高感度用
の低しきい値Ｌ１に切り替えることにより、火災を確実
に検知することができる。In the heat detector 10, in addition to the effect of the first embodiment, for example, when a heat source such as a heating device is driven, when the desired environmental temperature is reached, the drive state of the heat source is changed. Since the difference becomes small, the difference value ΔT, which is the amount of temperature change of the environmental temperature caused by the heat source, becomes small. Therefore, it is considered that there is almost no increase in the environmental temperature due to the heat source. By switching the threshold from the high threshold L2 for low sensitivity to the low threshold L1 for high sensitivity, a fire can be reliably detected.
【００１６】次に、本発明の第３実施形態を図４に基づ
いて以下に説明する。このものは、第２実施形態の熱感
知器10及び熱源20を備えた熱感知システム30であって、
熱感知器10のしきい値切替手段5 は、熱源20の駆動中に
しきい値を低しきい値Ｌ１又は高しきい値Ｌ２のいずれ
かに切り替える構成にしている。Next, a third embodiment of the present invention will be described below with reference to FIG. This is a heat sensing system 30 including the heat sensor 10 and the heat source 20 of the second embodiment,
The threshold value switching means 5 of the heat sensor 10 switches the threshold value to either the low threshold value L1 or the high threshold value L2 while the heat source 20 is being driven.
【００１７】かかる熱感知システム30にあっては、第２
実施形態の効果に加えて、しきい値切替手段5 は、熱源
20の駆動中にしきい値を低しきい値Ｌ１又は高しきい値
Ｌ２のいずれかに切り替えるのであって、人が手動によ
り、しきい値を低しきい値Ｌ１又は高しきい値Ｌ２のい
ずれかに切り替えるのではないから、しきい値切替手段
5 によるしきい値の切替に手間がかかるというようなこ
とがなくなる。In such a heat sensing system 30, the second
In addition to the effects of the embodiment, the threshold switching means 5
The threshold value is switched to either the low threshold value L1 or the high threshold value L2 during the driving of the motor 20, and a person manually changes the threshold value to either the low threshold value L1 or the high threshold value L2. Threshold switching means
There is no need to take time to switch the threshold value according to 5.
【００１８】なお、本実施形態は、第２実施形態の熱感
知器10及び熱源20を備えたものであるが、第１実施形態
の熱感知器10及び熱源20を備えたものでも、しきい値切
替手段5 によるしきい値の切替に手間がかかるというよ
うなことがなくなるという効果を奏することができる。Although the present embodiment includes the heat sensor 10 and the heat source 20 of the second embodiment, the one provided with the heat sensor 10 and the heat source 20 of the first embodiment may have a threshold. It is possible to obtain an effect that the switching of the threshold value by the value switching means 5 does not take time and effort.
【００１９】[0019]
【発明の効果】請求項１記載の発明は、しきい値は、し
きい値切替手段によって、高感度用の低しきい値又は低
感度用の高しきい値のいずれかに切り替えるのであるか
ら、例えば、暖房機器のような熱源を駆動させるとき
に、高感度用の低しきい値から低感度用の高しきい値に
切り替えることにより、火災でもないときに注意信号が
出力されるというような、いわゆる誤報を防止すること
ができる。According to the first aspect of the present invention, the threshold value is switched between the low threshold value for high sensitivity and the high threshold value for low sensitivity by the threshold value switching means. For example, when driving a heat source such as a heating device, by switching from a low threshold for high sensitivity to a high threshold for low sensitivity, a caution signal is output when there is no fire. It is possible to prevent false information.
【００２０】請求項２記載の発明は、請求項１記載の発
明の効果に加えて、例えば、暖房機器のような熱源を駆
動させている場合、所望の環境温度になると、熱源の駆
動状態が緩くなって、熱源による環境温度の温度変化量
である差分値が小さくなるので、熱源によるさらなる環
境温度の上昇は略ないと考えられるので、このようなと
きの環境温度の上昇は、火災によるものと推定でき、し
きい値を低感度用の高しきい値から高感度用の低しきい
値に切り替えることにより、火災を確実に検知すること
ができる。According to the second aspect of the present invention, in addition to the effects of the first aspect, for example, when a heat source such as a heating device is driven, the driving state of the heat source is changed when a desired environmental temperature is reached. As the temperature decreases and the difference value, which is the amount of change in the environmental temperature due to the heat source, becomes smaller, it is considered that there is almost no increase in the environmental temperature due to the heat source. By switching the threshold from the high threshold for low sensitivity to the low threshold for high sensitivity, a fire can be reliably detected.
【００２１】請求項３記載の発明は、しきい値切替手段
は、熱源の駆動中にしきい値を低しきい値又は高しきい
値のいずれかに切り替えるのであって、人が手動によ
り、しきい値を低しきい値又は高しきい値のいずれかに
切り替えるのではないから、しきい値切替手段によるし
きい値の切替に手間がかかるというようなことがなくな
る。According to a third aspect of the present invention, the threshold value switching means switches the threshold value to either the low threshold value or the high threshold value while driving the heat source. Since the threshold value is not switched to either the low threshold value or the high threshold value, it does not take time to switch the threshold value by the threshold value switching means.
【図１】本発明の第１実施形態の構成図である。FIG. 1 is a configuration diagram of a first embodiment of the present invention.
【図２】同上のしきい値の切替を示す説明図である。FIG. 2 is an explanatory diagram showing switching of a threshold value according to the embodiment.
【図３】本発明の第２実施形態のしきい値の切替を示す
説明図である。FIG. 3 is an explanatory diagram showing threshold value switching according to a second embodiment of the present invention.
【図４】本発明の第３実施形態の構成図である。FIG. 4 is a configuration diagram of a third embodiment of the present invention.
【図５】従来例の構成図である。FIG. 5 is a configuration diagram of a conventional example.
【図６】同上の誤報が出力される状態を示す説明図であ
る。FIG. 6 is an explanatory diagram showing a state in which the above false report is output.
1 温度計測手段 3 比較手段 4 判断手段 5 しきい値切替手段 10 熱感知器 20 熱源 30 熱感知システム ΔＴ 差分値 Ｌ２ 高しきい値 Ｌ１ 低しきい値 1 Temperature measurement means 3 Comparison means 4 Judgment means 5 Threshold switching means 10 Heat detector 20 Heat source 30 Heat detection system ΔT Difference value L2 High threshold L1 Low threshold
Claims (3)
と、温度計測手段により所定時間前に計測された過去の
温度計測データと温度計測手段により計測された現在の
温度計測データとを比較して両温度計測データの差分値
を出力する比較手段と、比較手段により出力された差分
値としきい値との比較に基づいて注意信号を出力する判
断手段と、を備えた熱感知器において、 前記しきい値を高感度用の低しきい値又は低感度用の高
しきい値のいずれかに切り替えるしきい値切替手段が設
けられたことを特徴とする熱感知器。1. A temperature measuring means for measuring a temperature change of an environment, and a comparison is made between past temperature measurement data measured by the temperature measuring means a predetermined time ago and current temperature measurement data measured by the temperature measuring means. A comparison unit that outputs a difference value between the two temperature measurement data, and a determination unit that outputs an attention signal based on a comparison between the difference value output by the comparison unit and a threshold value. A heat sensor, comprising: threshold switching means for switching a threshold between a low threshold for high sensitivity and a high threshold for low sensitivity.
前記低しきい値よりも低い所定値以下のときに前記しき
い値を前記高しきい値から前記低しきい値に切り替える
よう成したことを特徴とする請求項１記載の熱感知器。2. The threshold switching unit switches the threshold from the high threshold to the low threshold when the difference value is equal to or less than a predetermined value lower than the low threshold. The heat sensor according to claim 1, wherein the heat sensor is formed.
記載の熱感知器と、環境の温度を上昇させるよう駆動す
る熱源と、を備え、前記しきい値切替手段は、熱源の駆
動中に前記しきい値を前記低しきい値又は前記高しきい
値のいずれかに切り替えるよう成したことを特徴とする
熱感知システム。3. The heat sensor according to claim 1, further comprising: a heat source that drives the temperature of the environment to increase, wherein the threshold value switching unit drives the heat source. A heat sensing system wherein the threshold value is switched to either the low threshold value or the high threshold value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10367987A JP2000194965A (en) | 1998-12-24 | 1998-12-24 | Heat sensor, and heat sensing system provided with the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10367987A JP2000194965A (en) | 1998-12-24 | 1998-12-24 | Heat sensor, and heat sensing system provided with the same |
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| Publication Number | Publication Date |
|---|---|
| JP2000194965A true JP2000194965A (en) | 2000-07-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10367987A Pending JP2000194965A (en) | 1998-12-24 | 1998-12-24 | Heat sensor, and heat sensing system provided with the same |
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| Country | Link |
|---|---|
| JP (1) | JP2000194965A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113763663A (en) * | 2021-07-05 | 2021-12-07 | 徐辉 | Intelligent security alarm for smart park |
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1998
- 1998-12-24 JP JP10367987A patent/JP2000194965A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113763663A (en) * | 2021-07-05 | 2021-12-07 | 徐辉 | Intelligent security alarm for smart park |
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