Multi-array ball crown array of HIFU piezo

For the multi-array dome array of HIFU piezo ceramics, the different array arrangement means that the array has different structural characteristics, and different structural characteristics will correspond to different array sound field characteristics, such as the same focus , different focal lengths, different deflection ranges, and different grating lobes. So each different arrangement of array elements mentioned in the rectangular arrangement proposed by Ebinni, quasi-random proposed by Fink.

Arrangement of array elements are proposed by arrangement of ring-shaped dense , and the arrangement of spherical crown elements arranged by us, each of which has different sound field characteristics. Understand the advantages of the ultrasonic sound field characteristics of the spherical crown element array arrangement is compared with other arrangements, and the relationship between the structural characteristics of the spherical crown ultrasonic array model and the ultrasonic sound field characteristics. These two key issues are optimizing the ideal spherical crown. The face array structure has a guiding role.This section compares the sound field characteristics of the spherical high intensity focused ultrasound and the sound field characteristics of the rectangular array, and explores the advantages of the spherical crown ultrasonic array model in terms of sound field characteristics. In addition, we also studied the structural characteristic parameters of the array model F. The effect of number on the characteristics of the sound field.

For ball crown array A; array element number is 130, array element radius is 2.5mm, radius of curvature is 60mm, f-Number two is 0.81.

For rectangular array B, the number of elements is 121, the radius of the element is 2.5mm, and the radius of curvature is 60mm, F Number two is 0.81. The arrangement of the HIFU piezo ceramics for beauty is a rectangular array model proposed by Emad S. Ebbini.

Ball crown array D; array element number is 90, array element radius is 3.7mm, radius of curvature is 60mm, f-Number two is 0.72

     Then we defined the sound field of HIFU beauty treatment, based on which we analyzed the following two problems.

(1) In the single-point focus mode, the focusing of HIFU piezoelectric ceramic element
is deflected in the positive direction of the X-axis, respectively, within the specified sound field calculation range.Two-dimensional time peaks of spherical crown array A and rectangular array B at 0 mm, 4 mm, 6 mm, 9mm.The contour distribution of sound pressure. By comparing the sound field characteristics of array structures with different array elements and other structural parameters with the same or similar structure, the advantages of the arrangement of spherical and arbor elements in the sound field characteristics are explored.