Environmental measurement apparatus and environmental measurement method
US9880132B2 · kind B2 · utility
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Key dates
| Filing date | Dec 2, 2014 |
| Grant date | Jan 30, 2018 |
| Priority date | — |
| Expiry date | Feb 26, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/0426
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An environmental measurement apparatus includes an operation unit which calculates a first change in a first oscillation frequency of a first QCM sensor and a second change in a second oscillation frequency of a second QCM sensor. The operation unit corrects the second change based on the first change in a first period and the second change in the first period.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.