Method and system for detecting material using piezoelectric resonators
US5932953A · kind A · utility
109Cited by
20References
37Claims
0Family size
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Key dates
| Filing date | Jun 30, 1997 |
| Grant date | Aug 3, 1999 |
| Priority date | — |
| Expiry date | Jun 30, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/0422
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and system for detecting material bound on a surface of a piezoelectric resonator introduces a signal of a constant frequency through the sensing resonator and detects a change in the insertion phase shift of the resonator as a result of the binding of the material being detected on the surface of the resonator. Environmental effects on the measurement are effectively canceled by the use of a reference resonator driven by the same input signal. A multiple-port sensing device is provided which includes thin-film sensing and reference resonators monolithically formed on a substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.