JPH0535824B2 - - Google Patents
Info
- Publication number
- JPH0535824B2 JPH0535824B2 JP60141273A JP14127385A JPH0535824B2 JP H0535824 B2 JPH0535824 B2 JP H0535824B2 JP 60141273 A JP60141273 A JP 60141273A JP 14127385 A JP14127385 A JP 14127385A JP H0535824 B2 JPH0535824 B2 JP H0535824B2
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- sensor
- resistor
- oxygen concentration
- oxygen
- 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.)
- Expired - Lifetime
Links
- 239000001301 oxygen Substances 0.000 claims description 25
- 229910052760 oxygen Inorganic materials 0.000 claims description 25
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 18
- 239000007784 solid electrolyte Substances 0.000 claims description 7
- 238000001514 detection method Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 description 3
- 230000010356 wave oscillation Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
Landscapes
- Measuring Oxygen Concentration In Cells (AREA)
- Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、酸素濃度検出装置に関する。[Detailed description of the invention] (Industrial application field) The present invention relates to an oxygen concentration detection device.
（従来の技術）
従来、酸素濃度の検出方法として限界電流式酸
素イオン伝導性固体電解質酸素センサを用いる方
法がある。しかし、この限界電流式酸素イオン伝
導性固体電解質酸素センサは、ガス成分、センサ
温度あるいはセンサの構造によつて印加電圧を変
えても電流値が変化しない範囲が酸素濃度により
異ると云う限界電流特性が変化し誤差が大きくな
るという問題がある。(Prior Art) Conventionally, as a method for detecting oxygen concentration, there is a method using a limiting current type oxygen ion conductive solid electrolyte oxygen sensor. However, this limiting current type oxygen ion conductive solid electrolyte oxygen sensor has a limiting current, which means that the range in which the current value does not change even if the applied voltage changes depends on the gas composition, sensor temperature, or sensor structure, which varies depending on the oxygen concentration. There is a problem that the characteristics change and the error increases.
本発明は、上記の問題を解消することを目的と
するもので、以下図例に基づき具体的に説明す
る。 The present invention aims to solve the above-mentioned problems, and will be specifically explained below based on the illustrated examples.
（実施例）
第１図において、１は多孔質セラミツク、２は
限界電流式酸素イオン伝導性固体電解質酸素セン
サ、３は、電流検出用抵抗、４は積分増幅回路、
５は整流回路、６は正弦波発振回路、７は直流電
圧計である。(Example) In FIG. 1, 1 is a porous ceramic, 2 is a limiting current type oxygen ion conductive solid electrolyte oxygen sensor, 3 is a current detection resistor, 4 is an integral amplifier circuit,
5 is a rectifier circuit, 6 is a sine wave oscillation circuit, and 7 is a DC voltmeter.
正弦波発振回路６の出力を整流回路５で全波整
流し、第２図ａに示すような連続的に変化する電
圧Ｖを得、これを上記センサ２に印加する。これ
により上記抵抗３を流れる電流１ａ，１ｂ，１ｃ
は酸素濃度ａ％、ｂ％、ｃ％に対応して第２図ｂ
のａ，ｂ，ｃのような電圧電流特性を示す。ま
た、上記抵抗３の両端間電圧は、第２ｃ ａ，
ｂ，ｃに示すように、酸素濃度に対応して電圧変
化率の緩い領域が異なる歪液となる。この抵抗３
の両端間電圧を積分増幅回路４で積分することに
より、酸素濃度に対応して電位が異なる直流電圧
が得られ、この直流電圧が直流電圧計７で検出さ
れる。（第２図ｄ）
（発明の効果）
以上のように、本発明に係る酸素濃度検出装置
は、印加電圧が連続的に変化する限界電流式酸素
イオン伝導性固体電解質酸素センサの電流検出用
抵抗の両端間電圧を積分することにより酸素濃度
を測定するので、上記センサのアクテイブレンジ
全域にわたり、回路抵抗などの設定変更をせずに
一定の条件で、連続して酸素濃度を正確に測定で
きる等の効果を得られる。 The output of the sine wave oscillation circuit 6 is full-wave rectified by the rectifier circuit 5 to obtain a continuously changing voltage V as shown in FIG. 2a, which is applied to the sensor 2. As a result, currents 1a, 1b, 1c flowing through the resistor 3
corresponds to the oxygen concentration a%, b%, c% in Figure 2 b
The voltage-current characteristics are shown as a, b, and c. Further, the voltage across the resistor 3 is the second ca,
As shown in b and c, the strained liquid has different regions where the voltage change rate is slow depending on the oxygen concentration. This resistance 3
By integrating the voltage between both ends of , by the integral amplifier circuit 4, a DC voltage whose potential differs depending on the oxygen concentration is obtained, and this DC voltage is detected by the DC voltmeter 7. (Figure 2 d) (Effects of the Invention) As described above, the oxygen concentration detection device according to the present invention has a current detection resistor of a limiting current type oxygen ion conductive solid electrolyte oxygen sensor in which the applied voltage changes continuously. Since the oxygen concentration is measured by integrating the voltage across the sensor, it is possible to accurately measure the oxygen concentration continuously over the entire active range of the sensor under constant conditions without changing settings such as circuit resistance. You can get the effect of
また、本発明に係る酸素濃度検出装置は、連続
的に電圧が変化する電源と、この電源の電圧を印
加される限界電流式酸素イオン伝導性固体電解質
酸素センサと、このセンサの電流を検出するため
の抵抗と、この抵抗の両端間電圧を積分する積分
回路とを設けるに過ぎないので、上述の効果に加
えて、構成を簡単にできる等の効果を得ることが
できる。 Further, the oxygen concentration detection device according to the present invention includes a power source whose voltage changes continuously, a limiting current type oxygen ion conductive solid electrolyte oxygen sensor to which the voltage of the power source is applied, and a current of the sensor. Since only a resistor and an integrating circuit for integrating the voltage across the resistor are provided, in addition to the above-mentioned effects, the structure can be simplified.
第１図は本発明の一実施例を示す回路図、第２
図は第１図における各部の出力波形を示したもの
である。
２……限界電流式酸素イオン伝導性固体電解質
酸素センサ、３……抵抗、４……積分回路、５…
…正弦波発振回路。
Figure 1 is a circuit diagram showing one embodiment of the present invention, Figure 2 is a circuit diagram showing an embodiment of the present invention.
The figure shows the output waveforms of each part in FIG. 1. 2...Limiting current type oxygen ion conductive solid electrolyte oxygen sensor, 3...Resistor, 4...Integrator circuit, 5...
...Sine wave oscillation circuit.
Claims (1)
圧を印加される限界電流式酸素イオン伝導性固体
電解質酸素センサと、このセンサの電流を検出す
るための抵抗と、この抵抗の両端間電圧を積分す
る積分回路とを設けたことを特徴とする酸素濃度
検出装置。1 A power supply whose voltage changes continuously, a limiting current type oxygen ion conductive solid electrolyte oxygen sensor to which this power supply voltage is applied, a resistor for detecting the current of this sensor, and a voltage across this resistor. An oxygen concentration detection device characterized by being provided with an integrating circuit for integrating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60141273A JPS62850A (en) | 1985-06-26 | 1985-06-26 | Oxygen concentration detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60141273A JPS62850A (en) | 1985-06-26 | 1985-06-26 | Oxygen concentration detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62850A JPS62850A (en) | 1987-01-06 |
| JPH0535824B2 true JPH0535824B2 (en) | 1993-05-27 |
Family
ID=15288054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60141273A Granted JPS62850A (en) | 1985-06-26 | 1985-06-26 | Oxygen concentration detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62850A (en) |
-
1985
- 1985-06-26 JP JP60141273A patent/JPS62850A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62850A (en) | 1987-01-06 |
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