Measuring and testing – Speed – velocity – or acceleration – Acceleration determination utilizing inertial element
Patent
1997-04-04
1998-06-23
Oda, Christine K.
Measuring and testing
Speed, velocity, or acceleration
Acceleration determination utilizing inertial element
310321, G01P 1509
Patent
active
057707995
ABSTRACT:
Four piezoelectric elements are formed on both surfaces of a plate-shaped vibrating body. Two piezoelectric elements are formed to be opposite to each other at one side of the longitudinal center portion of the vibrating body. Another two piezoelectric elements are formed to be opposite to each other at the other side of the longitudinal center portion of the vibrating body. By applying a signal to the piezoelectric elements, the vibrating body is vibrated in a longitudinal direction. In this time, the vibrating body is vibrated in such a manner that longitudinal expansion and contraction take place simultaneously in a part of the vibrating body. By using such vibration, both longitudinal ends are not displaced in spite of the vibration of the vibrating body. The vibrating body can be used as an acceleration sensor by measuring the output voltages from the piezoelectric elements of the vibrating body.
REFERENCES:
patent: 4281298 (1981-07-01), Gounji
patent: 4633204 (1986-12-01), Gounji et al.
patent: 5166571 (1992-11-01), Konno
patent: 5451828 (1995-09-01), Tomikawa
Kaneko Takayuki
Nakamura Takeshi
Murata Manufacturing Co. Ltd.
Oda Christine K.
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