Portable ultrasonic underwater sensor
AssigneeFuji Ultrasonic Engineering Co., Ltd.
InventorsHideyuki Suzuki, Kimihiko Yazawa, Yasuhiro Sakamoto
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Abstract
A portable ultrasonic underwater sensor 15 has a piezoelectric element 21 disposed in a case 22 constructed as a cylinder 24 and having a truncated cone 25 both being integrally and axisymmetrically formed so as to constitute a vibrator 22A. A piezoelectric element 21 and the vibrator 22A are bonded together with a center of the piezoelectric element 21 matches the center of a reverse face of the truncated cone 25 of vibrator 22A, whereby the vibrator 22A is entirely resonant in a vibration mode in which flexional vibration at the center of the truncated cone 25 is a maximum amplitude, and wherein means for holding the vibrator 22A is located along a vibration nodal line on an external side face of the vibrator 22A.
Claims2
A portable ultrasonic underwater sensor, comprising a piezoelectric element that is stored in a case which is constructed as a cylinder with a right truncated cone integrally and coaxially formed so as to constitute a vibrator,
- said right truncated cone being axisymmetrical with an apex at a 90 degree angle,
- said vibrator being formed so that a thickness of said truncated cone is equal to a thickness of said cylinder,
- said piezoelectric element and said vibrator being bonded together with the center of said piezoelectric element aligned with the center of a reverse face of said right truncated cone of said vibrator, said vibrator being entirely resonant in a vibration mode in which flexional vibration at said center of said truncated cone is a maximum amplitude;
- and means for holding said vibrator said means disposed along a vibration nodal line on an external side face of said vibrator.
Dependencies are inferred from the claim text.