Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for generating acoustic vortex beam, piezoelectric transducer array and system

A piezoelectric transducer and array technology, applied in the field of acoustics, can solve the problems of poor energy superposition, short maintenance distance, high cost, etc., and achieve the effects of focusing acoustic vortex stabilization, enhanced energy superposition, and broadened directivity

Active Publication Date: 2020-11-10
吕舒晗
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The bottleneck in the development of the application of acoustic vortex beams is that the overall circuit of the current acoustic vortex beam system is complex, there are serious limitations in miniaturization and integration, and the cost is high
More importantly, the current system cannot dynamically change the depth of the focal spot, resulting in narrow directivity of the transmitting array element, poor energy superposition in the focal area, unstable focused acoustic vortex, and short distance maintained in the propagation direction
These reasons have hindered the widespread adoption of the technology

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for generating acoustic vortex beam, piezoelectric transducer array and system
  • Method for generating acoustic vortex beam, piezoelectric transducer array and system
  • Method for generating acoustic vortex beam, piezoelectric transducer array and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] According to the above research results, this embodiment provides a piezoelectric transducer array for generating vortex acoustic beams, which sets discretized non-flexible piezoelectric transducers on a flexible substrate, and adopts a new array arrangement Compared with the existing piezoelectric transducer array, the drive circuit is simpler, the array layout area is reduced, and the energy superposition of the acoustic vortex beam focal area is enhanced, which brings the possibility of miniaturization and low cost of the system.

[0042] In the manufacturing process of the piezoelectric transducer array in this embodiment, flexible materials used in flexible electronic technology are also used, so that the piezoelectric transducer array provided in this embodiment has sufficient ductility and bendability .

[0043] see figure 2 , the piezoelectric transducer array exemplary includes a flexible substrate, a plurality of non-flexible piezoelectric transducers and wi...

Embodiment 2

[0051] This embodiment provides a method for generating an acoustic vortex beam on the basis of the piezoelectric transducer array in Embodiment 1, which can dynamically change the depth of the focal spot, specifically including the following steps:

[0052] S1: Bending the PZT array in Example 1 from a circular shape to a concave spherical surface in an acoustic device. Of course, this step can also be completed in advance, for example, the acoustic device has already integrated a PZT array bent into a concave spherical surface, so the above steps may not be performed during the actual use of the acoustic device.

[0053] S2: Apply a sinusoidal signal with the same frequency and phase to each PZT;

[0054] S3: In using the acoustic device, due to the difference in the force applied to the acoustic device, the radius of curvature of the concave spherical surface is dynamically changed to dynamically change the depth of the focal spot of the acoustic vortex beam.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a method for generating a sound vortex beam, a piezoelectric transducer array and a system thereof. The piezoelectric transducer array comprises a flexible substrate and a plurality of piezoelectric transducers. The flexible substrate is in a concave spherical shape in a using state, and the curvature radius of the flexible substrate can be changed dynamically through bending deformation; and the flexible substrate is circular in a non-use state. A plurality of piezoelectric transducers are fixed on the flexible substrate, and are discretely arranged in a spiral manneron the circular flexible substrate. The upper surface electrodes of the plurality of piezoelectric transducers are connected in series through leads, and the lower surface electrodes of the pluralityof piezoelectric transducers are grounded. The piezoelectric transducer array and the system thereof are simple in structure and easy in integration and miniaturization; by bending the concave spherical surface of the flexible substrate, focal spot depth can be changed dynamically, the directivity of an emission array element is widened, the energy superposition in a focusing region is enhanced,a focusing acoustic vortex is stabler, and a long distance can be maintained in the propagation direction.

Description

technical field [0001] The present application relates to the technical field of acoustics, and in particular to a method for generating an acoustic vortex beam, a piezoelectric transducer array and a system. Background technique [0002] An acoustic vortex beam is a special sound wave carrying orbital angular momentum (OAM), characterized by a wavefront helical phase misalignment. In recent years, acoustic vortex beams with helical phase misalignment have attracted extensive attention, and their energy and phase distribution make them have great application potential. This technology has very broad application prospects in acoustic detection, imaging or manipulation and capture of tiny particles, especially in the medical field. The non-contact transfer of angular momentum enables acoustic vortex beams to be used as acoustic wrenches; the circular distribution of acoustic power enables them to be used as acoustic tweezers; the multi-order nature of the topological dimensio...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B06B1/06
CPCB06B1/0637B06B2201/55
Inventor 吕舒晗杜依诺张宝军
Owner 吕舒晗