Piezoelectric resonant sensor using the acoustoelectric effect
US5455475A · kind A · utility
85Cited by
13References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 1, 1993 |
| Grant date | Oct 3, 1995 |
| Priority date | — |
| Expiry date | Nov 1, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/101
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An AT cut quartz crystal resonator has an unbalanced electrode geometry to induce a particularly strong electrical field in a surface of the resonator adjacent a medium. The electrical field will interact with ions and dipoles in the medium and may be used to accurately and repeatably measure the electrical characteristics of the medium. Specific examples are provided illustrating the use of a sensor designed in accord with the invention in sensing dilute electrolytes, and other applications are contemplated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.