air-coupled piezoelectric transducers
Development of piezoelectric and electrodynamic flexural transducers for air coupled ultrasonics
... For air-coupled ultrasonics, because of the low sound speed and the relatively large element apertures required for generating significant pressure amplitudes, the 2 cri- terion cannot easily be ...
165
Experimental evaluation of three designs of electrodynamic flexural transducers
... flexural transducers (EDFT) for air-coupled ultrasonics are presented and ...The transducers operate without the use of piezoelectric materials, which can simplify manufacturing and ...
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Improving the thermal stability of 1-3 piezoelectric composite transducers
... the piezoelectric composites detailed in Table ...fully coupled solution that did consider these changes would become ...an air or water test environment and therefore changes ...
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Wideband electromagnetic dynamic acoustic transducers (WEMDATs) for air coupled ultrasonic applications
... of air-coupled ultrasonic ...the piezoelectric micromachined or flexural ultrasonic transducers can be considered as ...for air- coupled ultrasonic ...
5
Additive manufacture of impedance matching layers for air coupled ultrasonic transducers
... The transducers were excited with a single cycle, 10Vpp Sine wave, generated using a function generator (Tektronix AFG3021B) and the front face displacement measured by the laser interferometer positioned at the ...
5
Enhancing the bandwidth of piezoelectric composite transducers for air-coupled non-destructive evaluation
... is coupled into the lateral directions, 1 and 2, dependent upon the polymer material ...of transducers with low ceramic volume fractions, typically less than ...
32
Novel Design of Buchholz Relay by Implementation of Ultrasonic Liquid Level Transducer
... line transducers are single proceeding element longitudinal wave transducers used in conjoining with a replaceable delay ...immersion transducers over contact transducers are Uniform coupling ...
6
Characterisation of the polarisation state of embedded piezoelectric transducers by thermal waves and thermal pulses
... Figure 6 illustrates that a longer pulse width leads to a higher heat input and thus a larger signal. The experimental data in Fig. 6 are in qualitative agreement with the simula- tion in Fig. 5b. Consequently, the ...
6
A Micromachined Coupled-Cantilever for Piezoelectric Energy Harvesters
... 2DOF piezoelectric energy harvesting device which exploited the structure’s translation and rotation vibration ...cantilevers coupled to one another at one ...through coupled resonance at frequencies ...
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Improvement of Surface Finish by Multiple Piezoelectric Transducers in Fused Deposition Modelling
... multiple piezoelectric transducer never been done ...multiple piezoelectric transducer for FDM ...multiple piezoelectric to improve surface finish quality printed part by a destop FDM ...
6
Theoretical modelling of frequency dependent elastic loss in composite piezoelectric transducers
... of piezoelectric ultrasonic transducers by incorporating frequency dependent elas- tic ...these transducers and the fact that the materials used are lossy, and indeed loss can be used to enhance the ...
20
Design and analysis of two piezoelectric cymbal transducers with metal ring and add mass
... two piezoelectric transducers names piezoelectric transducer A (PTA) and piezoelectric transducer B (PTB) as were ...two transducers, optimizations of metal ring and add mass were ...
11
The influence of air pressure on the dynamics of flexural ultrasonic transducers
... three transducers were measured before they were subjected to elevations in environmental air pressure inside a custom pressure ...the transducers in these conditions was measured in different ...
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Harmonic analysis of lossy piezoelectric composite transducers using the plane wave expansion method
... ultrasonic transducers offer many advantages but the peri- odic pillar architecture can give rise to unwanted modes of vibration which interfere with the piston like motion of the fundamental thickness ...
23
Shear Bloch waves and coupled phonon-polariton in periodic piezoelectric waveguides
... in piezoelectric superlattices where piezoelectric or piezomagnetic composites are periodically made up of two or more different ...film piezoelectric layered structures are widely used to satisfy ...
22
Tapered transmission line technique based graded matching layers for thickness mode piezoelectric transducers
... mode piezoelectric transducers to a low acoustic impedance load medium, multiple quarter wavelength (QW) matching layers are employed at the front face of the ...
5
Noncontact Driving System Using Induction Based Method and Integrated Piezoelectric Ultrasonic Transducers
... Integrated Ultrasonic Transducers (IUTs) have been developed for high-temperature nondestructive evaluation applica- tions. In many field, it would be helpful if a pipe covered by a protective layer of about 10 cm ...
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Design of high frequency ultrasonic transducers with flexure decoupling flanges for thermosonic bonding
... design transducers, however, the calculations were not so accurate because there are usually some assumptions ...The transducers designed using these analytical methods usually need to be repeatedly ...
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