Transducer comprising a network of piezoelectric elements
First Claim
1. In an ultrasonic transducer which comprises a linear assembly of parallel transducer elements of piezoelectric material, each element having a width W:
- the improvement wherein the thickness T of each of the transducer elements is equal to one-half of the wavelength corresponding to a frequency F which is equal to the average of at least two successive piezoelectric resonance frequencies of the piezoelectric material and wherein the products of the thickness T and the two resonance frequencies frame coupling zones of at least two successive vibratory modes of the material in the bidimensional diagram of the curves F·
T=f(W/T) of the spread of the resonance frequencies of the piezoelectric material.
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Accused Products
Abstract
An ultrasonic transducer comprising a network of parallel piezoelectric transducer elements having a width W or in the form of a parallelepipedon having a length H and a width W, characterized in that the thickness T of the said transducer elements is equal to half the wavelength corresponding to a frequency F which is equal to the average value of at least two of the successive piezoelectric resonance frequencies of the piezoelectric material concerned, the products of the thickness and the resonance frequencies framing at least two successive vibratory modes of this material in the bidimensional diagram of the curves F·T=f(W/T) of the spread of the resonance frequencies relating to the piezoelectric material concerned or in the tridimensional diagram of the curves F·T=f(W/T, H/T).
21 Citations
2 Claims
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1. In an ultrasonic transducer which comprises a linear assembly of parallel transducer elements of piezoelectric material, each element having a width W:
the improvement wherein the thickness T of each of the transducer elements is equal to one-half of the wavelength corresponding to a frequency F which is equal to the average of at least two successive piezoelectric resonance frequencies of the piezoelectric material and wherein the products of the thickness T and the two resonance frequencies frame coupling zones of at least two successive vibratory modes of the material in the bidimensional diagram of the curves F·
T=f(W/T) of the spread of the resonance frequencies of the piezoelectric material.- View Dependent Claims (2)
Specification