Patent•
Two-dimensional annular phased array ultrasonic transducer structure
19 Dec 2012-
TL;DR: In this paper, a two-dimensional annular phased array ultrasonic transducer structure for three-dimensional ultrasonic imaging was presented. But the transducers were not designed for the 3D imaging.
Abstract: The invention discloses a two-dimensional annular phased array ultrasonic transducer structure for three-dimensional ultrasonic imaging. The transducer structurally comprises more than one array element ring which is annularly distributed in a concentric circle way, and each array element ring comprises more than two array elements, and the area of each array element is the same. According to the two-dimensional annular phased array ultrasonic transducer structure, the defect of signal to noise ratio caused by high technical process difficulty and small array element size of a two-dimensional area array transducer can be overcome, and the limit that a one-dimensional array and a phased array are in geometric focusing fixing, and a wave beam cannot be effectively narrowed can be overcome, so that the lateral resolution can be comprehensively improved, the signal to noise ratio can be effectively increased, and real-time three-dimensional ultrasonic imaging can be realized by electronic phased scanning.
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Patent•
05 Feb 2014
TL;DR: In this article, a transcranial Doppler plane annular phased array (DPA) is used for ultrasonic beam focusing in the spreading direction of ultrasonic beams, where each array element is respectively subjected to time delay during the emitting or receiving, and the emitting focusing or the receiving focusing is realized.
Abstract: The invention provides a transcranial Doppler plane annular phased array probe, which comprises a piezoelectric vibrator, a metal shielding casing, an electronic tuning circuit, a coaxial cable, a case, a back lining, a matching layer and an acoustic lens, wherein the piezoelectric vibrator comprises more than one array element ring in annular distribution to form concentric circles, each array element ring adopts independent lead wire control, the areas of all array elements are identical, in addition, the path differences of all array elements are identical, each independent array element is excited by adopting specific time delay, and the dynamic focusing in the spreading direction of ultrasonic beams can be achieved. The plane annular phased array is utilized, each array element is respectively subjected to time delay during the emitting or receiving, and the emitting focusing or the receiving focusing is realized, so focal points can be continuously adjusted, the ultrasonic beams can be effectively and controllably narrowed, the depth of field is long, the transcranial Doppler plane annular phased array probe has the advantages of variable aperture, variable focal point, variable trace and the like, the lateral resolution ratio of a system can be comprehensively improved, and the signal to noise ratio is effectively improved.
9 citations
Patent•
04 Jan 2017
TL;DR: In this paper, a jet angle controllable ultrasonic droplet jetting additive manufacturing device and method belonging to the field of additive manufacturing is described. And the device and the method have the effects of improving the printing precision and ensuring the physical and chemical properties and other properties of formed parts without needing print heads, thus avoiding pollution and cleaning difficulty of liquid materials.
Abstract: The invention relates to jet angle controllable ultrasonic droplet jetting additive manufacturing device and method, belonging to the field of additive manufacturing. The device is characterized in that a base is installed at the bottom; a jet tank is installed on the base; a focused ultrasonic transducer is installed in the jet tank; a base plate is fixed below wafer bearing platforms and above the jet tank; the wafer bearing platforms are installed on a Z-direction workbench; the Z-direction workbench is installed on the base; the jet tank is communicated with a liquid storage tank; a high-precision injection pump is connected with a feeding head; through focused ultrasound, liquid overcomes the surface tension and jets droplets from the liquid level; the power of four focused ultrasonic vibrators of the focused ultrasonic transducer is controlled by a computer and the focused ultrasonic vibrators interact and then change the jet angles of the droplets to jet the droplets to different positions on the base plate; a Z-axis motion platform cooperates with different jet angles to complete printing of different position points on the base plate. The device and the method have the effects of improving the printing precision and ensuring the physical and chemical properties and other properties of formed parts without needing print heads, thus avoiding pollution and cleaning difficulty of liquid materials.
5 citations
Patent•
16 Jul 2020
TL;DR: In this article, a sensor structure with a periodic band gap structure is proposed, which consists of a plurality of one-dimensional phononic crystal sector structures arranged at the same center, and a number of piezoelectric sensors correspondingly arranged inside the 1D phononic sector structures one by one.
Abstract: The invention discloses a sensor structure with a periodic band gap structure. The sensor structure comprises a plurality of one-dimensional phononic crystal sector structures arranged at the same center, and a plurality of piezoelectric sensors correspondingly arranged inside the one-dimensional phononic crystal sector structures one by one, wherein an air anti-interference zone is arranged between adjacent one-dimensional phononic crystal sector structures at the same time. The invention has the advantages that the sensor structure is designed by using a periodic structure and made of acoustic super material forming an optical band gap structure, and the sensing signal is enhanced by using the local resonance effect on the special frequency band of the signal, thereby achieving the purpose of improving the sensitivity of the sensor, and making the designed sensor structure have special physical properties.
1 citations
Patent•
21 Nov 2017
TL;DR: In this article, a 3D geometric model of a target area for sonodynamic therapy is acquired by utilizing a 2D ultrasonic phased array technology and a three-dimensional acoustic model of the target area is constructed.
Abstract: The invention provides an ultrasonic focusing method used for sonodynamic therapy. According to the invention, a 3D geometric model of a target area for sonodynamic therapy is acquired by utilizing a 2D ultrasonic phased array technology and a 3D acoustic model of the target area is constructed. A phased array focusing rule required for therapy is calculated according to a target position, a target size and the 3D acoustic model and excitation is performed on different array elements in a 2D ultrasonic phased array probe according to the phased array focusing rule. By adopting the method provided by the invention, energy can be focused to a lesion part accurately, the accuracy of sonodynamic therapy is improved and damage to normal parts can be reduced in the maximal level. Since the focusing method is adopted, the acoustic energy input efficiency is improved. Besides, the target position in the invention is determined through the focusing rule. The acoustic energy can be focused to the lesion part without movement of the probe during the therapy process, so that the operation is convenient and the efficiency is high. The method provided by the invention solves problems of poor acoustic energy input efficiency and poor treatment accuracy in traditional sonodynamic therapy.
1 citations
Patent•
20 Jul 2018
TL;DR: In this article, a capacitance type annular dynamic focusing air coupling ultrasonic transducer, which comprises a metal substrate, a plated electrode polymer film, and a phased array time-delay excitation circuit, is presented.
Abstract: The invention relates to a capacitance type annular dynamic focusing air coupling ultrasonic transducer, which comprises a metal substrate, a plated electrode polymer film, and a phased array time-delay excitation circuit The upper surface of the metal substrate is provided with a coarse cavity The coarse cavity is covered by the polymer film, and the upper surface of the polymer film is provided with a plated electrode The metal substrate is composed of a plurality of annular array elements The annular array elements are connected to one end of the phased array time-delay excitation circuit The other end of the phased array time-delay excitation circuit is connected to one end of a bias voltage circuit, and is taken as an excitation source by being connected to the transducer metal substrate electrode The annular array elements form an annular focusing phased array, which is used to emit sound waves The bias voltage circuit is used to tightly attaching the polymer film onto thesurface of the metal substrate so as to form a cavity resonant cavity through an electrostatic effect The provided ultrasonic transducer has the advantages of simple structure and low processing andmanufacturing cost, can form array elements with a small size, can realize dynamic focusing and air coupling dynamic nondestructive detection, and improves the detection speed and resolution
1 citations
References
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Patent•
14 Sep 2011
TL;DR: In this paper, a concave spherical surface eight-ring phased array high-intensity focused ultrasound energy converter is proposed to solve the problem of non-adjustable focal distance and position of the focal point by adjusting the thickness of a water pocket at the front part of the energy converter.
Abstract: The utility model relates to an energy converter, in particular to a concave spherical surface eight-ring phased array high-intensity focused ultrasound energy converter which has the characteristics of single-point focusing, adjustable focal distance, regular ellipsoid of a focal region and high temperature rising of a focal area and solves the problems in the existing acoustic lens focused ultrasound energy converter that the acoustic-electric efficiency is low, and the focal distance is non-adjustable; the manufacturing and a phase control circuit of a planar array ultrasound energy converter are complex; and a concave spherical surface self-focused ultrasound energy converter can only realize single focal point focusing, the focal distance is non-adjustable, and the position of the focal point can only be adjusted by the adjusting of the thickness of a water pocket that is arranged at the front part of the energy converter or by the position of the energy converter, the operation is complex and wastes time, and the precision is lower. The ultrasound energy converter is formed in a way that the concave spherical surface self-focused ultrasound energy converter is divided into eight rings with the same curvature axially, and then the eight rings are bonded by insulating paste. The energy converter can be used in the fields of industry, agriculture, medical science and the like, the focal distance is adjustable and can enlarge the heating range, the temperature of the focal region rises, the focusing effect is good, the structure of the energy converter and the phase controlling circuit are simple, and the phase controlling is easy.
13 citations
Patent•
[...]
17 Oct 1986
TL;DR: An array-type radiator has a multiplicity of individual radiators (1 to 48) which are arranged on an inner ring (101) and an outer ring (102) as discussed by the authors.
Abstract: An array-type radiator has a multiplicity of individual radiators (1 to 48) which are arranged on an inner ring (101) and an outer ring (102). When the individual radiators (1 to 48) are driven, phase delays occur so that the resultant acoustic beam is electronically rotated in all planes of the room and an electronic point focus is possible at various depths in all planes. The acoustic field of the resultant acoustic beam is symmetric, the lateral resolution being equal in azimuthal and elevative direction. Much fewer individual radiators than in the case of a matrix array are needed, which results in easier fabrication.
9 citations
Patent•
26 May 2010
TL;DR: In this article, a centrally symmetrical phased focused array transducer comprising planar wafer elements, which comprises a base, a shell and a plurality of array elements, was proposed.
Abstract: The invention relates to a centrally symmetrical phased focused array transducer comprising planar wafer elements, which comprises a base, a shell and a plurality of array elements, wherein the array elements are distributed in a centrally symmetrical plane concentric circle form; a plurality of planar wafer piezoelectric elements are arranged circularly to replace a single circular piezoelectric element with a large size; the upper surfaces of all plane wafer piezoelectric elements are connected with a public electrode of a copper mesh; and the lower surfaces of all plane wafer piezoelectric elements on a circle with a radius r are connected in series into one path by electric excitation signal wires and are individually excited by one path of power supply to form a branch The invention has the advantage that the plurality of plane wafer piezoelectric elements are arranged circularly to replace the single circular piezoelectric element with the large size Compared with a transducer made of large circular elements, the novel transducer not only can keep the advantages of a phased focused circular array but also can overcome the disadvantages of the phased focused circular array by adopting proper processing and manufacturing technology
9 citations
Patent•
23 Sep 2009
TL;DR: In this article, a high-frequency annular array digital ultrasonic system consisting of an ANN transducer, a receiving system, an analog to digital converter, a dynamic focus receiving and variable-aperture control beam forming module, a digital echo synthesizing module, an ultrasonic signal processing module and a display unit are all connected in sequence.
Abstract: The utility model relates to a high-frequency annular array digital ultrasonic system, belonging to the technical field of ultrasonic wave testing and aiming at overcoming the defects that the linear array scanning technology and the like can only focus in one dimension, improving the resolution ratio in all directions, effectively improving the signal to noise ratio and maximumly improving the image quality The high-frequency annular array digital ultrasonic system comprises an annular array transducer, a receiving system, an analog to digital converter, a dynamic focus receiving and variable-aperture control beam forming module, a digital echo synthesizing module, an ultrasonic signal processing module and a display unit which are all connected in sequence and also comprises a processor which is connected with the annular array transducer through a time sequence control system and an ultrasonic emission driving system and is also respectively connected with the analog to digital converter, the dynamic focus receiving and variable-aperture control beam forming module The utility model is mainly used for the design and the manufacture of an ultrasonic testing apparatus
7 citations
Patent•
01 Dec 2005
TL;DR: In this paper, a large focal field phase-controlled array focusing ultrasonic transducer is presented, which is formed from a large-aperture rigid spherical crown body and several plane transducers array elements.
Abstract: The present invention relates to a large focal field phase-controlled array focusing ultrasonic transducer. It is formed from a large-aperture rigid spherical crown body and several plane ultrasonic transducer array elements. Said invention also provides the distribution and arrangement mode of all the array elements, every array element has an independent electric actuating signal feeder, and respectively connected to phase-controlled signal activation system, the frequencies of all the array element actuating signals are identical, and their phases and voltage amplitudes are different, said invention utilizes regulation and control of actuating phases and amplitudes of all the array elements to implement electronic focusing and scanning and produce multifocus sound field distribution with several modes so as to further form focal field with required shape and size and provide ultrasonic energy required for heating target tissue, and can ensure that the target tissue has uniform heat dose distribution and can directionally heat the deep tumor focus of human body.
5 citations