Communications: electrical – Continuously variable indicating – With particular transmitter
Patent
1981-11-16
1987-03-31
Caldwell, Sr., John W.
Communications: electrical
Continuously variable indicating
With particular transmitter
73505, 73517AV, 310360, 331156, C08C 1900
Patent
active
046546634
ABSTRACT:
An angular rate sensor system is disclosed, consisting of a balanced resonant sensor. The sensor consists of a tuning fork of a piezoelectric material, preferably of quartz. The tines of the tuning fork are caused to vibrate electromechanically, for example, by impressing an alternating voltage on a pair of electrodes on each tine. This will cause the tines to vibrate. Any component of angular motion around the axis of the sensor causes a cyclic deflection of the tines at right angles to the normal driven vibration of the tines. If the rotational input to the handle of the sensor is applied through a torsion element, the resulting tine deflection is directed to cyclically rotate the entire sensor along the input/output axis. This deflection can be used for changing the capacitance of a capacitance bridge, or for generating an electric signal, due to the piezoelectric effect resulting from the deflection. Finally, the output signal may consist of a frequency-modulated signal or an optical pick-up may be used. The system may take various forms, including one, two, four, or eight tuning forks forming a unitary system.
REFERENCES:
patent: 2683247 (1954-07-01), Wiley
patent: 3127775 (1964-04-01), Hansen
patent: 3141100 (1964-07-01), Hart
patent: 3143889 (1964-08-01), Simmons
patent: 3206986 (1965-09-01), Christensen
patent: 3258617 (1966-06-01), Hart
patent: 3269192 (1966-08-01), Southworth et al.
patent: 3307409 (1967-03-01), Newton
patent: 3319472 (1967-05-01), Reefman
patent: 3391547 (1968-07-01), Kingston
patent: 3465597 (1969-09-01), Riordan et al.
patent: 3520195 (1970-07-01), Tehon
patent: 3656354 (1972-04-01), Lynch
patent: 3678762 (1972-07-01), Denis
patent: 3680391 (1972-03-01), Denis
patent: 3839915 (1974-10-01), Schlitt
patent: 3961318 (1976-06-01), Farrand et al.
patent: 4019391 (1977-04-01), Ljung
patent: 4263546 (1981-04-01), Morris
patent: 4429248 (1984-01-01), Chuang
patent: 4479098 (1984-10-01), Watson
R. E. Barnaby, et al., "General Theory and Operational Characteristics of the Gyrotron Angular Rate Tachometer,": Nov. 1953, pp. 31-36, Aeronautical Engineering Review.
J. Lyman, "A New Space Rate Sensing Instrument," Nov. 1953, pp. 21-30, Aeronautical Engineering Review.
C. T. Morrow, "Zero Signals in the Sperry Tuning Fork Gyrotron," May 1955, pp. 581-585, J of Acoustical Society of America.
G. C. Newton, Jr., "Comparison of Vibratory and Rotating-Wheel Gyroscopic Rate Indicators," Jul. 1960, pp. 143-150, Part II, Transactions of the American Institute of Electronics Engineers (AIEE).
G. C. Newton, Jr., "Theory and Practice in Vibratory Rate Gyros", Jun. 1963, pp. 95-99, Control Engineering.
Alsenz Evert C.
Juptner William F.
Macy David F.
Caldwell Sr. John W.
Heim Michael F.
Piezoelectric Technology Investors, Ltd.
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