Surgery – Truss – Pad
Patent
1995-06-30
1997-06-17
Manuel, George
Surgery
Truss
Pad
310320, A61B 800
Patent
active
056388225
ABSTRACT:
An ultrasonic probe for coupling acoustic signals between the probe and a medium is provided. The ultrasonic probe has a piezoelectric element having a plurality of piezoelectric layers each having a different acoustic impedance. The piezoelectric layers are stacked in progressive order of acoustic impedance such that the layer with the acoustic impedance nearest to that of the medium is proximate the medium. At least one of said piezoelectric layers is made of piezoelectric composite material. The ultrasonic probe further has an electrode means for electrically coupling the piezoelectric layers to a voltage source for applying an oscillation voltage potential to each piezoelectric layer. The probe further has a control means for controlling the polarization of at least one of the piezoelectric layers.
REFERENCES:
patent: 4348904 (1982-09-01), Bautista, Jr.
patent: 5118982 (1992-06-01), Inoue et al.
patent: 5163436 (1992-11-01), Saitoh
patent: 5359760 (1994-11-01), Busse et al.
patent: 5434827 (1995-07-01), Bolorforosh
Gururaja, T.R., et al., "Piezoelectric Composite Materials for Ultrasonic Transducer Applications . . . ", IEEE Transactions on Sonics and Ultrasonics, vol. SU-32, No. 4, Jul. 1985, pp. 499-513.
Marton, L., et al., "Methods of Experimental Physics", Academic Press, vol. 19, 1981, pp. 46-51.
Newnham, R.E., et al., "Connectivity & Piezoelectric-Pyroelectric Composites", Mat. Res. Bull. vol. 13, 1978, pp. 525-536.
Pan, W.Y., et al., "Large Piezoelectric Effect Induced by Direct Current Bias in PMN", Japanese Journal of Applied Physics, vol. 28, No. 4, Apr. 1989, pp. 653-661.
Redwood, M., "Transient Performances of a Piezoelectric Transducer", The Journal of the Acoustical Society of America, vol. 33, No. 4, Apr. 1961, pp. 527-536.
Shrout, Thomas R. et al., "Relaxor Ferroelectric Materials", Ultrasonic Symposium, 1990, pp. 711-720.
Smith, Wallace A., "Modeling 1-3 Composite Piezoelectric: Hydrostatic Response", IEEE Trans. on Ultrasonics, Ferroelectrics, & Frequency Ctrl., vol. 40, No. 1 (Jan. 1993), pp. 41-48.
Smith, Wallace A., "The Role of Piezocomposites in Ultrasonic Transducers", Ultrasonics Symposium, 1989, pp. 755-766.
Greenstein Michael
Gururaja Turuvekere R.
Harriott Douglas
Seyed-Bolorforosh Mir Said
Hewlett--Packard Company
Manuel George
LandOfFree
Hybrid piezoelectric for ultrasonic probes does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Hybrid piezoelectric for ultrasonic probes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hybrid piezoelectric for ultrasonic probes will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2152045