JPS61144465U - - Google Patents
Info
- Publication number
- JPS61144465U JPS61144465U JP2823185U JP2823185U JPS61144465U JP S61144465 U JPS61144465 U JP S61144465U JP 2823185 U JP2823185 U JP 2823185U JP 2823185 U JP2823185 U JP 2823185U JP S61144465 U JPS61144465 U JP S61144465U
- Authority
- JP
- Japan
- Prior art keywords
- diode
- gas sensor
- resistor
- voltage
- circuit
- 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.)
- Pending
Links
- 239000000356 contaminant Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 5
- 238000001514 detection method Methods 0.000 description 4
- 238000009423 ventilation Methods 0.000 description 1
Landscapes
- Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
Description
第１図は本考案の一実施例の主要部の構成を示
す回路図、第２図は他の実施例の主要部の構成を
示す部分回路図、第３図は一般的なガス検知素子
の構成を部分的に破断して示した斜視図、第４図
はこのガス検知素子を用いた従来のガス感知器の
側面図、第５図はこのガス感知器の全体的な構成
を示す回路図、第６図はこのガス感知器の部分的
な構成を示す回路図である。
１……ガス感知器、３……換気扇、１０……電
源部、２０……ガス検知素子、２１……抵抗体、
２５……ヒータコイル、３０……検出部、３１…
…コンパレータ、３２……半固定抵抗、３３……
固定抵抗、３４……設定器、３６……温度補償素
子、３８……定電圧ダイオード、３９……ダイオ
ード、４０……判別出力回路。
Fig. 1 is a circuit diagram showing the structure of the main part of one embodiment of the present invention, Fig. 2 is a partial circuit diagram showing the structure of the main part of another embodiment, and Fig. 3 is a circuit diagram of a general gas detection element. FIG. 4 is a side view of a conventional gas sensor using this gas detection element, and FIG. 5 is a circuit diagram showing the overall structure of this gas sensor. , FIG. 6 is a circuit diagram showing a partial configuration of this gas sensor. 1... Gas sensor, 3... Ventilation fan, 10... Power supply unit, 20... Gas detection element, 21... Resistor,
25... Heater coil, 30... Detection section, 31...
...Comparator, 32...Semi-fixed resistor, 33...
Fixed resistor, 34... Setting device, 36... Temperature compensation element, 38... Constant voltage diode, 39... Diode, 40... Discrimination output circuit.
Claims (1)
の回路と、汚染ガス濃度に応じて抵抗値が変化す
る抵抗体に抵抗素子が直列接続された第２の回路
とにそれぞれ電圧を印加し、前記可変抵抗器の摺
動子に発生する電圧と、前記抵抗体および抵抗素
子の接合点に発生する電圧とを比較して汚染ガス
の有無を検出するガス感知器において、前記可変
抵抗器の固定抵抗部に、両端電圧を一定に保持す
るためのダイオードを並列接続したことを特徴と
するガス感知器。 ２ 前記ダイオードは定電圧ダイオードでなる実
用新案登録請求の範囲第１項記載のガス感知器。 ３ 前記ダイオードは順方向に接続されたダイオ
ードでなる実用新案登録請求の範囲第１項記載の
ガス感知器。[Claims for Utility Model Registration] 1. A first device in which a resistance element is connected in series to a variable resistor.
A voltage is applied to the circuit and a second circuit in which a resistance element is connected in series to a resistor whose resistance value changes depending on the concentration of the contaminated gas, and the voltage generated at the slider of the variable resistor and the second circuit are connected in series. , in a gas sensor that detects the presence or absence of contaminant gas by comparing the voltage generated at the junction of the resistor and the resistance element, a fixed resistance part of the variable resistor is provided with a resistor for keeping the voltage at both ends constant. A gas sensor characterized by connecting diodes in parallel. 2. The gas sensor according to claim 1, wherein the diode is a constant voltage diode. 3. The gas sensor according to claim 1, wherein the diode is a forward-connected diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2823185U JPS61144465U (en) | 1985-02-28 | 1985-02-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2823185U JPS61144465U (en) | 1985-02-28 | 1985-02-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61144465U true JPS61144465U (en) | 1986-09-06 |
Family
ID=30525921
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2823185U Pending JPS61144465U (en) | 1985-02-28 | 1985-02-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61144465U (en) |
-
1985
- 1985-02-28 JP JP2823185U patent/JPS61144465U/ja active Pending