Laser spectrometer and method for measuring concentration of a gas component in a measurement gas
US9207169B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 19, 2013 |
| Grant date | Dec 8, 2015 |
| Priority date | — |
| Expiry date | Feb 19, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2201/0691
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A laser spectrometer and method for measuring gas component concentration in a measurement gas, wherein light intensity from a wavelength-tunable laser diode is detected after irradiation of the measurement gas and a reference gas, and the concentration of the gas component is determined based on reduction of the light intensity by the absorption of light at the position of a selected absorption line of the gas component, and the position of the absorption line of the gas component is referenced based on a selected absorption line of the reference gas, and wherein there is a mixed operation consisting of actual measurements of fast concentration changes of the gas component to be measured and a short reference/standardization phase for wavelength referencing, line locking and standardization, where the duration of the actual measurement is measured such that measuring conditions remain constant and do not deviate from those during the reference/standardization phase.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.