US 10,935,646 B2 · Ultrasonic transducer with composite case

Abstract

A composite case of an airborne ultrasonic transducer for transmitting, receiving, or both of ultrasound in atmospheric environment at an ultrasound pressure level is disclosed. The case comprises a first case component and at least a second case component. The second case component is made of a material different from the first case component having an acoustic impedance smaller than that of said first case component and is structurally connected to the first case component for reducing said mechanical quality factor while maintaining said ultrasound pressure level. The connection between the first and second case components is by strong bonding at an interface between the components so that the strong bonding forms a composite structure for the case.

Claims12

Dependent claims

A composite case of an airborne ultrasonic transducer having a piezoelectric converter and a mechanical quality factor for transmitting, receiving, or both of ultrasound in atmospheric environment at an ultrasound pressure level, said composite case comprising:

a metal portion having an inner surface of a top plate for receiving the piezoelectric element attached to the inner surface and ultrasound is emitted from an outer surface of said top plate into the air and an ultrasound is received from the air via the outer surface of said top plate;
and
at least one plastic portion structurally connected to said metal portion by strong bonding at an interface therebetween for reducing said mechanical quality factor while maintaining said ultrasound pressure level, said strong bonding referring to a bonding for allowing a deformation of said composite case to deform continuously from the metal portion to the plastic portion.

Dependencies are inferred from the claim text.

Ultrasonic transducer with composite case

Life of this patent

Ultrasonic transducer with composite case

Life of this patent

Abstract

Claims12