Microwave moisture content sensor and method for deriving linear regression correlation between moisture content of object and signal measured by moisture content sensor
US12031923B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 8, 2021 |
| Grant date | Jul 9, 2024 |
| Priority date | — |
| Expiry date | Jan 12, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N22/04
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A microwave coupling moisture content sensor and a method for deriving a linear regression correlation between signal data generated by a microwave moisture content sensor and moisture contents of objects are disclosed. The microwave coupling moisture content sensor includes a microwave resonator and a signal feeding member or a microwave emitting member. An object is placed outside the microwave resonator, and the signal feeding member or the microwave emitting member emits microwaves, which penetrate the object. The resonance frequency and the amplitude of the microwave resonator are measured to obtain the moisture content of the object. Several objects having known moisture contents are detected by the microwave coupling moisture content sensor to obtain corresponding resonance frequency and amplitude. Correlation coefficients of several combinations are calculated, and the combinations having low correlation coefficients are removed, whereby the best linear regression correlation is derived for the measurement of moisture contents of objects.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.