Vibrator

Details Vibrator Vibrator

1990-10-31

1992-05-26

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310358, 310366, 310369, 310319, H01L 4108

Patent

active

051171481

ABSTRACT:
The vibrator includes a columnar vibrating body consisting of a piezoelectric material. The vibrating body is formed into a polygonal or cylindrical column and, when necessary, a through hole is formed axially thereof. Furthermore, the vibrating body is polarized. On side faces of the vibrating body, at least three external electrodes are formed. Also, when the through hole is to be formed, an internal electrode is formed on its inner circumferential surface. By applying the driving signal to these electrodes, the vibrating body bends and vibrates. And, when the rotational angular velocity is applied to the vibrating body about its axis, a coriolis force is produced responsive thereto. By this coriolis force, the vibrating direction of the vibrating body changes, and a voltage is produced between the two external electrodes. By measuring the voltage, the rotational angular velocity applied to the vibrator can be measured.

REFERENCES:
patent: 2439499 (1948-04-01), Williams et al.
patent: 2540412 (1951-02-01), Adler
patent: 2944118 (1960-07-01), Gray
patent: 2955216 (1960-10-01), Dieter, Jr.
patent: 3114849 (1963-12-01), Poschenrieder
patent: 3117189 (1964-01-01), Kopp
patent: 3168623 (1965-02-01), Petermann
patent: 3784849 (1974-01-01), Cooper

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