JPS6412258A - Simultaneous measurement of concentration and moisture of oxygen - Google Patents
Simultaneous measurement of concentration and moisture of oxygenInfo
- Publication number
- JPS6412258A JPS6412258A JP62166956A JP16695687A JPS6412258A JP S6412258 A JPS6412258 A JP S6412258A JP 62166956 A JP62166956 A JP 62166956A JP 16695687 A JP16695687 A JP 16695687A JP S6412258 A JPS6412258 A JP S6412258A
- Authority
- JP
- Japan
- Prior art keywords
- voltages
- steam
- concentration
- moisture
- sensors
- 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
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title abstract 2
- 239000001301 oxygen Substances 0.000 title abstract 2
- 229910052760 oxygen Inorganic materials 0.000 title abstract 2
- 238000005259 measurement Methods 0.000 title 1
- 239000007789 gas Substances 0.000 abstract 3
Landscapes
- Measuring Oxygen Concentration In Cells (AREA)
Abstract
PURPOSE:To obtain correct oxygen concentration and moisture, by converting limit current values by a circuit into an output voltage as obtained when voltages equal to two applied voltages in an atmospheric gas to be measured containing steam are applied to sensors to detect the concentration of steam in a proportional relationship from a difference between both voltages. CONSTITUTION:A circuit with a trimmer (variable resistor) having a function of converting a current value into a voltage value is used to perform an adjustment so as to make a difference down to zero between output voltages E1 and E2 of sensors 1 and 2 in an atmospheric gas not containing steam such as dry air, hence to E1=E2. Limit current values IL1 and IL2 as obtained when voltages equal or almost equal to applied voltages V1 and V2 in the atmospheric gas containing steam are applied to the sensors are converted with a circuit into output voltages E1 and E2. Then, a difference DELTAE is determined between the voltages E1 and E2 to detect the concentration of steam from a proportional relationship between the DELTAE and a steam partial pressure. Moisture is determined by computation by using the output voltages E1 and E2, atmospheric pressure and temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62166956A JPS6412258A (en) | 1987-07-06 | 1987-07-06 | Simultaneous measurement of concentration and moisture of oxygen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62166956A JPS6412258A (en) | 1987-07-06 | 1987-07-06 | Simultaneous measurement of concentration and moisture of oxygen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6412258A true JPS6412258A (en) | 1989-01-17 |
Family
ID=15840736
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62166956A Pending JPS6412258A (en) | 1987-07-06 | 1987-07-06 | Simultaneous measurement of concentration and moisture of oxygen |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6412258A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013529274A (en) * | 2010-05-06 | 2013-07-18 | エフピーティ モトーレンフォアシュンク アクチェンゲゼルシャフト | Method and apparatus for monitoring a humidity sensor in a combustion engine, using oxygen measurement of other sensors in the engine such as NOx, lambda, and / or oxygen sensors |
-
1987
- 1987-07-06 JP JP62166956A patent/JPS6412258A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013529274A (en) * | 2010-05-06 | 2013-07-18 | エフピーティ モトーレンフォアシュンク アクチェンゲゼルシャフト | Method and apparatus for monitoring a humidity sensor in a combustion engine, using oxygen measurement of other sensors in the engine such as NOx, lambda, and / or oxygen sensors |
| US9772273B2 (en) | 2010-05-06 | 2017-09-26 | Fpt Motorenforschung Ag | Method and device for monitoring a humidity sensor in a combustion engine, using oxygen measurement of other sensors in the engine, such as NOx, lambda and/or oxygen sensors |
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