Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1993-11-01
1995-10-03
Dougherty, Thomas M.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
310322, 310338, 73 5425, G01N 2900, H01L 4108
Patent
active
054554756
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.
REFERENCES:
patent: 2483829 (1949-10-01), Hershberger
patent: 3260104 (1966-07-01), King
patent: 3561253 (1971-02-01), Dorman
patent: 3879992 (1975-04-01), Bartera
patent: 4236893 (1980-12-01), Rice
patent: 4242096 (1980-12-01), Oliveira et al.
patent: 4721874 (1988-01-01), Emmert
patent: 4741200 (1988-05-01), Hammerle
patent: 4870313 (1989-09-01), Hirama et al.
patent: 5201215 (1993-04-01), Granstaff et al.
patent: 5211053 (1993-05-01), Muramatsu
patent: 5235238 (1993-08-01), Nomura et al.
patent: 5283037 (1994-02-01), Baer et al.
"Quartz Crystal Resonators as Sensors in Liquids Using the Acoustoelecric Effect", Shana & Tossi, Anal Chem, 1994, 66, 1955-1964.
Acoustoionic Interaction of SH Surface Waves with Dilute Ionic Solutions; Josse and Shana, 1991 IEEE, vol. 38, No. 3, May, 1991 pp. 297-304.
Quartz Resonator as Sensor for Viscous/Conductive Liquids; Josse et al.; "Electronics Letters", Oct. 12, 1989, vol. 25, No. 21, pp. 146-1447.
LiNbO.sub.3 Acoustic Plate Mode Sensor for Dilute Ionic Solutions; Josse et al.; "Electronics Letters", Jun. 21, 1990, vol. 26, No. 13, pp. 834-835.
Analysis of Piezoelectric Bulk-Acoustic-Wave Resonators as Detectors in Viscous Conductive Liquids; Josse et al.; 1990 IEEE, vol. 37, No. 5, Sep., 1990, pp. 359-368.
Electrical Surface Perturbation of a Piezoelectric Acoustic Plate Mode by a Conductive Liquid Loading; Josse and Shana; 1992 IEEE, vol. 39, No. 4, Jul., 1992, pp. 512-518.
Theory and Applications of Quartz Resonators as Sensors for Viscous Conductive Liquids; Shana et al.; IEEE Ultrasonics Symposium, 1989, pp. 567-571.
Probing of Strong and Weak Electrolytes with Acoustic Wave Fields; Dahint et al.; "Sensors and Actuators" 1992, pp. 155-162.
On the Use of ZX-LiNbO.sub.3 Acoustic Plate Mode Devices as Detectors for Dilute Electrolytes; "Sensors and Actuators", 1992 pp. 97-112 Josse et al.
Acoustic Plate Waves for Measurements of Electrical Properties of Liquids; "Microchemical Journal", vol. 43, pp. 155-164 (1991) Josse et al.
Josse Fabien J.
Shana Zack A.
Dougherty Thomas M.
Marquette University
Watkins Albert W.
LandOfFree
Piezoelectric resonant sensor using the acoustoelectric effect does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Piezoelectric resonant sensor using the acoustoelectric effect, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Piezoelectric resonant sensor using the acoustoelectric effect will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1079341