公开(公告)号：US09711132B1

公开(公告)日：2017-07-18

申请号：US15247334

申请日：2016-08-25

Applicant: Korea Research Institute of Standards and Science

Inventor： Yong Tae Kim ,  Kyung Min Baik ,  Il Doh ,  Se Hwa Kim

IPC: G10K11/30 ,  G01S7/521 ,  G01S15/02

CPC classification number: G10K11/30 ,  G01S7/521 ,  G01S15/02

Abstract: The present disclosure relates to an acoustic lens using a Fresnel zone plate, a design method and a manufacturing method of the acoustic lens, a focusing ultrasonic transducer to which the acoustic lens is applied, and a manufacturing method of the focusing ultrasonic transducer. More specifically, an acoustic lens using a Fresnel zone plate which is applied to a focusing ultrasonic transducer. The acoustic lens includes a plurality of concentric regions which is concentrically disposed with respect to a center point. In the concentric region, a sound insulation region which blocks an entering sound wave and a transmission region which transmits the sound wave are alternately formed in a radial direction from the center point, and the entering sound wave is focused near a focal point.

公开(公告)号：US20170122798A1

公开(公告)日：2017-05-04

申请号：US15129504

申请日：2015-04-10

Applicant: KOREA RESEARCH INSTITUTE OF STANDARDS AND SCIENCE

Inventor： Wan Sup Cheung ,  Kyung Min Baik

IPC: G01H9/00

CPC classification number: G01H9/00 ,  G01B9/02081 ,  G01B9/02083 ,  G01M7/025 ,  G01M7/027

Abstract: The present invention is aimed at providing measurement method for vibration displacement using state variation principle which achieves real time implementation through super high-speed DSP or FPGA as well as improves precision as much as picometer level and at the same time saves memory capacity compared to conventional invention.

公开(公告)号：US12208417B2

公开(公告)日：2025-01-28

申请号：US17325669

申请日：2021-05-20

Applicant: KOREA RESEARCH INSTITUTE OF STANDARDS AND SCIENCE

Inventor： Yong Tae Kim ,  Kyung Min Baik ,  Sung Mok Kim ,  Hyung Jin Lee ,  Il Doh

IPC: B06B1/06 ,  H10N30/06

Abstract: The present invention relates to a flat-plate focusing ultrasonic transducer and an acoustic lens composed of an annular array piezoelectric element and methods of manufacturing and designing thereof, more particularly to a flat-plate focusing ultrasonic transducer composed of an annular array piezoelectric element, wherein the annular array piezoelectric element has a plurality of concentric regions which is concentrically arranged in a concentric circle shape with respect to a center point, the concentric region has ring shaped sound insulation regions and piezoelectric regions which are alternatively formed in a direction from the center point to a radius direction, so as to focus a sound wave near a focal point, wherein the piezoelectric regions are composed of a piezoelectric ring that is composed of a piezoelectric material and thus excites a sound wave, the concentric region is in a shape of a flat-plate of which both sides are flat and which has a constant thickness, and each radius of the plurality of the sound insulation regions and the piezoelectric regions in the concentric region are calculated based on a set focal length of the ultrasonic transducer and a frequency of a set sound wave.

公开(公告)号：US10337911B2

公开(公告)日：2019-07-02

申请号：US15129504

申请日：2015-04-10

Applicant: KOREA RESEARCH INSTITUTE OF STANDARDS AND SCIENCE

Inventor： Wan Sup Cheung ,  Kyung Min Baik

IPC: G01H9/00 ,  G01B9/02 ,  G01M7/02

Abstract: The present invention is aimed at providing measurement method for vibration displacement using state variation principle which achieves real time implementation through super high-speed DSP or FPGA as well as improves precision as much as picometer level and at the same time saves memory capacity compared to conventional invention.