Measuring and testing – Speed – velocity – or acceleration – Angular rate using gyroscopic or coriolis effect
Patent
1992-11-24
1995-02-14
Williams, Hezron E.
Measuring and testing
Speed, velocity, or acceleration
Angular rate using gyroscopic or coriolis effect
310329, G01P 904
Patent
active
053884582
ABSTRACT:
A resonantly vibrating or tuning fork rate sensor in which a quartz beam is instrumented with electrodes in first and second regions forming respective sense and drive electrodes wherein the piezoelectric resonance affect of the quartz material between the drive electrodes is used as a tuning element for an oscillator circuit. The electrodes are driven in a balanced voltage mode and sensed in a common mode rejection differential amplifier while leads running to the electrodes along the quartz beam are placed at positions of minimal field strength for improving the signal to noise ratio of the device. The rate sensor utilizes a multi-electrode pattern in order to make such lead placement possible. The sense pattern and drive pattern may be either in one orientation with the drive electrodes proximate to the body of the quartz resonator or in a second pattern with the sense electrodes proximate to the body. Both the drive electrodes and the sense electrodes operate on the piezoelectric principal, utilizing constriction to induce vibration from the drive electrodes and sensing the current generated from piezoelectric effect resulting from the vibrational compression which occurs out of the plane of vibration during inertial rate input. Alternatively, a capacitive electrode structure may be utilized as a pick-off.
REFERENCES:
patent: Re32931 (1989-05-01), Staudte
patent: Re33479 (1990-12-01), Juptner et al.
patent: 3696429 (1972-10-01), Tressa
patent: 4122448 (1978-10-01), Martin
patent: 4144764 (1979-03-01), Hartzell, Jr.
patent: 4155257 (1979-05-01), Wittke
patent: 4336718 (1982-06-01), Washburn
patent: 4414852 (1983-11-01), McNeill
patent: 4524619 (1985-06-01), Staudte
patent: 4590801 (1986-05-01), Merhav
patent: 4628734 (1986-12-01), Watson
patent: 4671112 (1987-06-01), Kimura et al.
patent: 4727752 (1988-03-01), Peters
patent: 4735506 (1988-04-01), Pavlath
patent: 4761743 (1988-08-01), Wittke
patent: 4834538 (1989-05-01), Heeks et al.
patent: 4898032 (1990-02-01), Voles
patent: 4922756 (1990-05-01), Henrion
patent: 4929860 (1990-05-01), Hulsing, II et al.
patent: 4981359 (1991-01-01), Tazartes et al.
patent: 5090809 (1992-02-01), Ferrar
patent: 5094537 (1992-03-01), Karpinski, Jr.
patent: 5131273 (1992-07-01), Tabata et al.
patent: 5138883 (1992-08-01), Paquet et al.
patent: 5205171 (1993-04-01), O'Brien et al.
patent: 5226321 (1993-07-01), Varnham et al.
patent: 5233874 (1993-08-01), Putty et al.
patent: 5241861 (1993-09-01), Hulsing, II
Soderkvist, Jan, "A Mathematical Analysis of Flexural Vibrations of Piezoelectric Beams With Applications to Angular Rate Sensors," Comprehensive Summaries of Uppsala Dissertions from the Faculty of Science 244, Electronics Group, Dept. of Technology, Uppsala University, Uppsala, Sweden, pp. 1-139, .COPYRGT.1990.
Petrovich Anthony
Weinberg Marc S.
Kwok Helen C.
The Charles Stark Draper Laboratory Inc.
Williams Hezron E.
LandOfFree
Quartz resonant gyroscope or quartz resonant tuning fork gyrosco does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Quartz resonant gyroscope or quartz resonant tuning fork gyrosco, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Quartz resonant gyroscope or quartz resonant tuning fork gyrosco will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-280833