Biological piezoelectric transducer device for the living body
First Claim
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1. A biological transducer device comprising a flexible organic film like high molecular peizoelectric element having electrode layers secured to both surfaces of opposite sides;
- a lead wire connected to each of said electrode layers;
thin film auxiliary electrodes connected to said lead wires extending along the electrode layers of said piezoelectric element, at least one of said auxiliary electrodes being secured to one electrode layer at one end with the other end being free to allow free to allow free displacement of said one auxiliary electrode;
an insulating film formed around the piezoelectric element;
shielding mens for shielding the piezoelectric element; and
a protective skin covering the exterior of said shielding means whereby the assembly is flexible.
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Abstract
A biological transducer device for measuring blood pressure, heart pulse, heart sound etc. comprising a high molecular piezoelectric element which is in a thin film or ribbon form so that the transducer is very pliable so as to make close accurate contact with a measuring point on a human body without producing any creases. The piezoelectric element is enclosed in netting comprised of a metal wire mesh so that the transducer is completely shielded from outer mechanical and electrical noise.
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Citations
23 Claims
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1. A biological transducer device comprising a flexible organic film like high molecular peizoelectric element having electrode layers secured to both surfaces of opposite sides;
- a lead wire connected to each of said electrode layers;
thin film auxiliary electrodes connected to said lead wires extending along the electrode layers of said piezoelectric element, at least one of said auxiliary electrodes being secured to one electrode layer at one end with the other end being free to allow free to allow free displacement of said one auxiliary electrode;
an insulating film formed around the piezoelectric element;
shielding mens for shielding the piezoelectric element; and
a protective skin covering the exterior of said shielding means whereby the assembly is flexible. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
- a lead wire connected to each of said electrode layers;
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11. A biological transducer device comprising;
- a pair of flexible film like high molecular piezoelectric elements, electrode layers secured to opposite sides of each of said piezoelectric elements, said piezoelectric elements being superimposed on each other, a thin film auxiliary electrode interposed between said piezoelectric elements;
further thin film auxiliary electrodes extending along the electrode layers at the upper and lower faces of said superimposed piezoelectric elements, an electrode plate interposed between said piezoelectric elements;
a lead wire connected to said electrode plate at a position near one end of said piezoelectric elements, said interposed auxiliary electrode being secured to the adjacent electrode layers and said electrode plate at a position where said lead wire is connected;
said further auxiliary electrodes being connected at one end to the adjacent electrode layers to allow free displacement of said auxiliary electrodes;
an insulating film surrounding said piezoelectric elements and electrodes;
shielding means for shielding the piezoelectric elements; and
a flexible protective skin covering the exterior of said shielding means.
- a pair of flexible film like high molecular piezoelectric elements, electrode layers secured to opposite sides of each of said piezoelectric elements, said piezoelectric elements being superimposed on each other, a thin film auxiliary electrode interposed between said piezoelectric elements;
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12. A biological transducer device comprising;
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a thin film piezoelectric element; electrode means secured to the respective surfaces of said piezoelectric element; a thin film auxiliary electrode extending along each electrode means secured to the surfaces of said piezoelectric element; t least one lead wire connected to each of said electrodes of said piezoelectric element; said auxiliary electrodes being secured to said electrode means at one end with the other ends being free to allow free displacement of said auxiliary electrodes; an insulating film surrounding said piezoelectric element and electrodes; shield means substantially surrounding said piezoelectric element; a flexible protective skin covering the exterior of said shield means; said piezoelectric elements being comprised of high molecular piezoelectric material. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
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- 22. The biological transducer device according to clim 18, wherein said ceramic is a ceramic powder having a fineness in the range of 0.2 to 44 microns.
Specification