Method of making a miniature, high efficiency dual frequency ultrasonic transducer
First Claim
1. In a method of manufacturing a miniature ultrasonic transducer for use in a liquid carrying vessel, the steps of:
- forming a body of piezoelectric material in the shape of an annulus having a central opening, an outer diameter D no greater than about 0.018 inch, and a pair of annular end surfaces of width W separated by a thickness T, dimensioning the diameter D and an aspect ratio D/T to provide a strong low frequency resonant mode of operation, and dimensioning the thickness T and an aspect ratio W/T to provide a strong high frequency resonant mode of operation.
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Accused Products
Abstract
Ultrasonic transducer with a selectable beamwidth comprising a body of piezoelectric material in the form of an annulus having an outer diameter D and a thickness T. The body has proximal and distal generally planar parallel surfaces and a centrally disposed hole extending therethrough. The body has a cylindrical wall with a width W extending from the hole to the outer diameter. The transducer is capable-of operating at low and high resonance frequencies with the low frequency resonance being determined by the diameter D and an aspect ratio of D/T and the high frequency resonance being determined by the thickness T and an aspect ratio of W/T.
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Citations
10 Claims
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1. In a method of manufacturing a miniature ultrasonic transducer for use in a liquid carrying vessel, the steps of:
- forming a body of piezoelectric material in the shape of an annulus having a central opening, an outer diameter D no greater than about 0.018 inch, and a pair of annular end surfaces of width W separated by a thickness T, dimensioning the diameter D and an aspect ratio D/T to provide a strong low frequency resonant mode of operation, and dimensioning the thickness T and an aspect ratio W/T to provide a strong high frequency resonant mode of operation.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
Specification