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 30/80 (2023.02); H10N 35/80 (2023.02); B22F 10/12 (2021.01); Y10T 29/42 (2015.01)] | 3 Claims |
1. A preparation method of a flexible piezoelectric sensor, the flexible piezoelectric 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, the method comprising the following steps:
S1 selecting polymer powder and magnetic powder as raw materials, mixing the polymer powder and the magnetic powder to prepare composite powder, calculating and obtaining a compression modulus of the spiral structure in the conductive part, constructing a porous structure of the magnetic part, and calculating and obtaining a compression modulus of the porous structure, forming the porous structure by a 3D printing method, thereby obtaining the required magnetic part; magnetizing the magnetic part so that the magnetic part obtains permanent magnetism;
S2 constructing a three-dimensional structure of the conductive part, and simultaneously constructing the compression modulus of the spiral structure according to the compression modulus of the porous structure, such that a ratio of the compression modulus of the spiral structure of the conductive part to the compression modulus of the porous structure is 0.1 to 10, selecting a raw material of the conductive part, performing a 3D printing method by using the raw material according to the 3D model, thereby obtaining the required conductive part;
S3 assembling the magnetic part with permanent magnetism between the substrates of the conductive part to obtain the required piezoelectric sensor.
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