JPS6174190U - - Google Patents
Info
- Publication number
- JPS6174190U JPS6174190U JP15900084U JP15900084U JPS6174190U JP S6174190 U JPS6174190 U JP S6174190U JP 15900084 U JP15900084 U JP 15900084U JP 15900084 U JP15900084 U JP 15900084U JP S6174190 U JPS6174190 U JP S6174190U
- Authority
- JP
- Japan
- Prior art keywords
- output
- comparison circuit
- sensing element
- fire detector
- composite fire
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000001514 detection method Methods 0.000 claims description 5
- 239000004065 semiconductor Substances 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims 3
- 230000001934 delay Effects 0.000 claims 1
- 239000000463 material Substances 0.000 claims 1
- 238000002336 sorption--desorption measurement Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 5
- 239000003990 capacitor Substances 0.000 description 1
Landscapes
- Fire-Detection Mechanisms (AREA)
- Emergency Alarm Devices (AREA)
Description
図面は本考案の実施例を示すもので、第１図は
ブロツク図、第２図，ａ，ｂは半導体素子と
焦電体素子の作動説明図、第３図は遅延回路の動
作特性を示す説明図、第４図は温度検知素子の抵
抗−温度特性を示す説明図、第５図は従来の減光
式感知器を示す説明図、第６図は同半導体素子の
説明図である。
１，２，３，４…比較回路、１′，２′，３′
，４′…同出力、１０…半導体素子、２０…温度
検知素子、２１…焦電体素子、Ｒ１，Ｒ５，Ｒ６
，Ｒ７，Ｒ８…抵抗、Ｒ２，Ｒ３，Ｒ４…可変抵
抗、Ｃ１…コンデンサ、Ｄ１，Ｄ２，Ｄ３…ダイ
オード、Ｖ２，Ｖ３，Ｖ４，Ｖ７…比較回路の基
準電圧、Ｖ１…Ａ点の電位、Ｖ５…Ｄ点の電位、
Ｖ６…Ｃ点の電位、Ｖｃ…遅延回路出力、ＶＤ…
即時回路出力。
The drawings show an embodiment of the present invention: Fig. 1 is a block diagram, Fig. 2, a and b are explanatory diagrams of the operation of the semiconductor element and the pyroelectric element, and Fig. 3 shows the operating characteristics of the delay circuit. FIG. 4 is an explanatory diagram showing the resistance-temperature characteristics of a temperature sensing element, FIG. 5 is an explanatory diagram showing a conventional dimming type sensor, and FIG. 6 is an explanatory diagram of the same semiconductor element. 1, 2, 3, 4...comparison circuit, 1', 2', 3'
, 4'...Same output, 10...Semiconductor element, 20...Temperature detection element, 21...Pyroelectric element, R1, R5, R6
, R7, R8... Resistor, R2, R3, R4... Variable resistor, C1... Capacitor, D1, D2, D3... Diode, V2, V3, V4, V7... Reference voltage of comparison circuit, V1... Potential at point A, V5 ...potential at point D,
V6... Potential at point C, Vc... Delay circuit output, VD...
Immediate circuit output.
Claims (1)
子と、気体の吸脱着現象によつて電気伝導度が変
化する第２の検知素子と、前記第１の検知素子の
出力と第２の検知素子の出力とを合成し、該出力
の大きさを基準値と比較する第１及び第２の比較
回路と、該第１との比較回路の出力のみ所定時間
遅らせる遅延回路と、前記第２の検知素子の周囲
温度による電気伝導度の変化を補正する第３の検
知素子と、該第３の検知素子の出力を基準値と比
較する第３の比較回路に導き、該第３の比較回路
の出力を前記第２の比較回路の出力と合成するよ
うにするとともに、前記第１の比較回路の基準設
定値を、前記第２の比較回路の基準設定値より低
く定めるようにしたことを特徴とする複合火災検
出器。 (2) 第１の検知素子が、焦電体である実用新案
登録請求の範囲第１項記載の複合火災検出器。 (3) 第２及び第３の検知素子が、酸化物半導体
である実用新案登録請求の範囲第１項記載の複合
火災検出器。[Claims for Utility Model Registration] (1) A first sensing element that responds to changes in incident infrared rays, a second sensing element whose electrical conductivity changes due to a gas adsorption/desorption phenomenon, and a second sensing element that responds to changes in incident infrared rays; First and second comparison circuits that combine the output of the detection element and the output of the second detection element and compare the magnitude of the output with a reference value, and only the output of the comparison circuit with the first one for a predetermined time. a delay circuit that delays the delay, a third sensing element that corrects a change in electrical conductivity due to ambient temperature of the second sensing element, and a third comparison circuit that compares the output of the third sensing element with a reference value. The output of the third comparison circuit is synthesized with the output of the second comparison circuit, and the reference setting value of the first comparison circuit is set to be higher than the reference setting value of the second comparison circuit. A composite fire detector characterized in that it is set low. (2) The composite fire detector according to claim 1, wherein the first detection element is a pyroelectric material. (3) The composite fire detector according to claim 1, wherein the second and third detection elements are oxide semiconductors.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15900084U JPH0330955Y2 (en) | 1984-10-20 | 1984-10-20 | |
| KR2019840012242U KR910000246Y1 (en) | 1984-07-11 | 1984-11-27 | Composite fire sensor |
| US06/753,987 US4640628A (en) | 1984-07-11 | 1985-07-11 | Composite fire sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15900084U JPH0330955Y2 (en) | 1984-10-20 | 1984-10-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6174190U true JPS6174190U (en) | 1986-05-20 |
| JPH0330955Y2 JPH0330955Y2 (en) | 1991-06-28 |
Family
ID=30716962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15900084U Expired JPH0330955Y2 (en) | 1984-07-11 | 1984-10-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0330955Y2 (en) |
-
1984
- 1984-10-20 JP JP15900084U patent/JPH0330955Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0330955Y2 (en) | 1991-06-28 |
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