US 12,251,878 B2
Flexible piezoelectric sensor based on 4D printing
Chunze Yan, Hubei (CN); Hongzhi Wu, Hubei (CN); Bin Su, Hubei (CN); and Yusheng Shi, Hubei (CN)
Assigned to HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY, Hubei (CN)
Filed by HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY, Hubei (CN)
Filed on Dec. 21, 2023, as Appl. No. 18/391,682.
Application 18/391,682 is a division of application No. 17/037,745, filed on Sep. 30, 2020, granted, now 11,938,680.
Claims priority of application No. 202010158697.0 (CN), filed on Mar. 9, 2020.
Prior Publication US 2024/0157649 A1, May 16, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. B29C 64/386 (2017.01); B22F 10/18 (2021.01); B22F 10/28 (2021.01); B22F 10/38 (2021.01); B22F 12/30 (2021.01); B29C 64/153 (2017.01); B29C 64/307 (2017.01); B33Y 80/00 (2015.01); H10N 30/30 (2023.01); H10N 35/80 (2023.01); B22F 10/12 (2021.01)
CPC B29C 64/386 (2017.08) [B22F 10/18 (2021.01); B22F 10/28 (2021.01); B22F 10/38 (2021.01); B22F 12/30 (2021.01); B29C 64/153 (2017.08); B29C 64/307 (2017.08); B33Y 80/00 (2014.12); H10N 30/302 (2023.02); H10N 35/80 (2023.02); B22F 10/12 (2021.01); Y10T 29/42 (2015.01)] 6 Claims
OG exemplary drawing
 
1. A flexible piezoelectric sensor based on 4D printing, wherein the sensor comprises a magnetic part and a conductive part, wherein:
the conductive part comprises two substrates disposed opposite to each other and a spiral structure disposed between the two substrates, both the two substrates and the spiral structure are formed of conductive metal materials;
the magnetic part is a flexible porous structure and arranged between the two substrates to generate a magnetic field;
when the two substrates are subjected to external pressure, the spiral structure and the magnetic part are compressed simultaneously, a magnetic flux passing through the spiral structure changes, and a voltage of the two substrates changes, by measuring a voltage change of the two substrates to reflect the change of external pressure, a pressure measuring process is achieved.