Patent ID: 11874158
Assignee: ZHEJIANG UNIVERSITY
Field: Other special machines (Mechanical engineering)
Classification: CPC G  B | IPC B  G

Claim 0:
1. A method for preparing a fully soft self-powered vibration sensor, wherein the fully soft self-powered vibration sensor comprises: a polydimethylsiloxane (PDMS) film, a liquid metal droplet oscillator, an out-of-plane porous carbon electrode, and a PDMS cavity; the out-of-plane porous carbon electrode is disposed on a surface of the PDMS cavity, and the PDMS film covers the PDMS cavity and assembled with the PDMS cavity to form a cavity, and the liquid metal droplet oscillator is disposed inside the cavity; wherein the method comprises the following steps:
1) forming a two-dimensional porous carbon electrode with an origami structure, comprising: using a CO2 laser to carbonize a polyimide substrate according to a predesigned pattern to generate the two-dimensional porous carbon electrode, and cutting down the two-dimensional porous carbon electrode along a pattern edge;
2) attaching the polyimide substrate together with the two-dimensional porous carbon electrode onto a mold complementary to the cavity, and filling the mold with a PDMS solution to be cured to obtain a sample;
3) placing the sample in a vacuum chamber to evacuate air, making the PDMS solution penetrate into pores of porous carbon; then taking out the sample and heating the sample to fully cure the PDMS solution;
4) forming the out-of-plane porous carbon electrode, comprising: removing a PDMS solid from the mold, peeling off the polyimide substrate to separate it from a porous carbon electrode, completing transfer of the porous carbon electrode onto an out-of-plane surface of the PDMS cavity; and
5) engraving microstructures on surfaces of the out-of-plane porous carbon electrode and the PDMS film using a UV pulsed laser, injecting a liquid metal droplet into the PDMS cavity, and covering the PDMS film above the PDMS cavity for sealing the PDMS cavity.