Smart cymbal transducers with nitinol end caps tunable to multiple operating frequencies

Differential scanning calorimetry of superelastic Nitinol for tunable cymbal transducers

Recent research has shown that estimations of the transformation temperatures of superelastic Nitinol using differential scanning calorimetry can be inaccurate, in part, due to the residual stress in the material. Superelastic Nitinol is selected as the end-cap material in a tunable cymbal transducer. The differential scanning calorimetry accuracy is initially probed by comparing transformation...

Scanning Tomographic Acoustic Microscopy with Multiple Transducers and Frequencies

The scanning tomographic acoustic microscope (STAM) is an instrument that utilizes the principles of diffraction tomography and acoustical holography to produce unambiguous subsurface images of structurally complex objects. One of the several techniques to obtain projection data is to rotate the transducer and another, to rotate the specimen. In either case a small unknown movement out of regis...

Dynamics characterisation of cymbal transducers for power ultrasonics applications

A class V cymbal flextensional transducer is composed of a piezoceramic disc sandwiched between two cymbal-shaped shell endcaps. Depending on the type of piezoceramic, there exists a maximum voltage that can be reached without depolarisation, but also, at higher voltage levels, amplitude saturation can occur. In addition, there is a restriction imposed by the mechanical strength of the bonding ...

Smart Transducers Interface

This paper deals with the proposed OMG standard for STs (see [OMG01]). STs in agreement with this standard proposal provide interfaces with the same form and behavior for the wide array of differing sensor and actuator nodes. The internal structure and operation of these differing STs remain encapsulated within the ST and are not exposed at the interfaces that are accessible from the client. A ...

SiGe based Multiple-phase VCO Operating for mm-Wave Frequencies