公开(公告)号：US20240345032A1

公开(公告)日：2024-10-17

申请号：US18681599

申请日：2022-08-08

Applicant: Purdue Research Foundation

Inventor： Nithin Raghunathan ,  Na Lu ,  Vishal Saravade ,  Enrique Silva

IPC: G01N29/12 ,  G01N29/09 ,  G01N29/24 ,  G01N29/32 ,  G01N29/44

CPC classification number: G01N29/12 ,  G01N29/09 ,  G01N29/2437 ,  G01N29/326 ,  G01N29/44 ,  G01N2291/0232 ,  G01N2291/0251 ,  G01N2291/02881

Abstract: An ultra-low-power wireless impedance measurement system is provided having a sensor group with a piezoelectric sensor, a temperature sensor, an impedance analyzer and a wireless transceiver is to transmit associated data via wireless transmission. Processed temperature and impedance data are transmitted to a server, whereby the processed temperature and impedance data are conveyed to a user via a website.

公开(公告)号：US20230413671A1

公开(公告)日：2023-12-21

申请号：US17874863

申请日：2022-07-27

Applicant: Purdue Research Foundation

Inventor： Kazuaki Yazawa ,  Na Lu ,  Yining Feng

IPC: H10N10/17 ,  H10N10/01 ,  H10N10/82 ,  H10N10/852

CPC classification number: H10N10/17 ,  H10N10/01 ,  H10N10/82 ,  H10N10/852

Abstract: A thin-film thermoelectric generator including flexible base film substrate having a longitudinal direction and a transverse direction perpendicular to the longitudinal direction. Thermoelectric (TE) elements are located on the base film substrate. The TE elements arranged in columns oriented along the longitudinal direction of the base film substrate and rows oriented along the transverse direction of the base film substrate. Line grooves are located between at least portion of the rows of the TE elements and extending across the base film substrate in the transverse direction to provide flexibility to the thin-film thermoelectric generator.

公开(公告)号：US20230243781A1

公开(公告)日：2023-08-03

申请号：US18002789

申请日：2021-07-01

Applicant: Purdue Research Foundation

Inventor： Na Lu ,  Zhihao Kong

IPC: G01N29/12 ,  G01N29/24 ,  G01N29/44

CPC classification number: G01N29/12 ,  G01N29/2437 ,  G01N29/2475 ,  G01N29/4418 ,  G01N2291/014 ,  G01N2291/0232 ,  G01N2291/0251

Abstract: A method includes filling a cavity of a form defined by one or more boundaries with an uncured concrete mixture such that the uncured concrete mixture contacts or envelops a piezoelectric sensor within the form, receiving one or more electrical signals from the piezoelectric sensor as the uncured concrete mixture cures within the form to define a concrete sample, determining an electrical signal-frequency spectrum of the electrical signal(s) received from the piezoelectric sensor, determining one or more resonant frequencies of the concrete sample based on the electrical signal-frequency spectrum, determining a Young's modulus of the concrete sample based on the one or more resonant frequencies thereof, and outputting the determined Young's modulus or information based on the determined Young's modulus.