The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 30, 2022
Filed:
May. 10, 2019
Seoul National University R&db Foundation, Seoul, KR;
Center for Advanced Meta-materials, Daejeon, KR;
Yoon Young Kim, Seoul, KR;
Min Woo Kweun, Seoul, KR;
Xiong Wei Yang, Seoul, KR;
Chun Guang Piao, Seoul, KR;
SEOUL NATIONAL UNIVERSITY R&DB FOUNDATION, Seoul, KR;
CENTER FOR ADVANCED META-MATERIALS, Daejeon, KR;
Abstract
An ultrasonic transducer employing a meta slab includes a piezoelectric body configured to generate elastic waves; a meta slab connected to the piezoelectric body and configured to induce elastic wave mode conversion resonance with respect to the elastic waves incident on the meta slab; and a wedge connected to the meta slab, attached to an external surface of a pipe, and configured to transmit the elastic waves having passed through the meta slab to the pipe. The meta slab includes an anisotropic medium and a thickness of the meta slab satisfies the equation as follows: d=m·n·λ/4, d=m·n·λ/4, n/2−n/2=odd. Thus, highly-efficient flow velocity measurement is possible.