Relative humidity sensor with compensation for changes in pressure and gas composition
US6777120B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 23, 2001 |
| Grant date | Aug 17, 2004 |
| Priority date | — |
| Expiry date | Mar 24, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/50
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A sensor system for sensing the relative humidity level of gas stream in a fuel cell includes a humidity sensor that senses the relative humidity of a gas stream and generates a relative humidity signal. A pressure sensor senses the pressure of the gas stream and generates a pressure signal. A temperature sensor senses the temperature of the gas stream and generates a temperature signal. A compensator is connected to the humidity sensor, the temperature sensor and/or the pressure sensor. The compensator generates a compensated relative humidity signal based on the relative humidity signal, the temperature signal and/or the pressure signal. Additional inputs to the compensator can include one or more gas composition sensors that determine the concentration of one or more gases.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.