公开(公告)号：US11802859B2

公开(公告)日：2023-10-31

申请号：US17120239

申请日：2020-12-13

Applicant: University of Electronic Science and Technology of China

Inventor： Yuanjie Su ,  Qichen Gong ,  Yanmeng Chen ,  Guangzhong Xie ,  Huiling Tai ,  Xiaosong Du ,  Yadong Jiang

IPC: G01N33/00 ,  G01N27/12 ,  H02N1/04

CPC classification number: G01N33/0059 ,  G01N27/12 ,  G01N27/122 ,  G01N27/125 ,  G01N33/0027 ,  G01N33/0031 ,  G01N33/0047 ,  H02N1/04 ,  G01N27/128 ,  G01N33/0009

Abstract: The disclosure relates to a wireless self-powered gas sensor based on electromagnetic oscillations triggered by external forces and its fabrication method. The sensor includes a gas test chamber, a first friction layer, a second friction layer, an interdigital electrode, a gas-sensitive material, an air inlet, an air outlet and leads. The gas sensor of the disclosure is an integrated detection system of “environmental energy collection—wireless energy transmission—active spontaneous detection” that can be driven simultaneously only by external mechanical movement, and can work independently without external power supply. The first friction layer and the second friction layer are arranged outside the gas test chamber. The frictional motion will not interfere with the flow field of the test chamber and the gas molecule absorption and desorption, which ensures the stability of gas detection to the greatest extent.

公开(公告)号：US11750116B2

公开(公告)日：2023-09-05

申请号：US17153833

申请日：2021-01-20

Applicant: University of Electronic Science and Technology of China

Inventor： Yuanjie Su ,  Qichen Gong ,  Guangzhong Xie ,  Mingliang Yao ,  Chunxu Chen ,  Jinyang Yi ,  Li Jia ,  Weizhi Li ,  Huiling Tai ,  Xiaosong Du ,  Yadong Jiang

IPC: H02N1/04 ,  F01N11/00 ,  H10N30/05

CPC classification number: H02N1/04 ,  F01N11/00 ,  H10N30/05 ,  F01N2560/026

Abstract: A self-powered automobile exhaust gas sensor including a supporting frame, a ferroelectric-triboelectric coupling functional film, and two metal electrodes. The ferroelectric-triboelectric coupling functional film comprises a first end fixed on the supporting beam in middle of the supporting frame, and a second end is freestanding. The two metal electrodes are grounded and adhered on the upper and lower sides of the supporting frame, respectively. An iron block is mounted on the top of the supporting frame. The ferroelectric-triboelectric coupling functional film includes a negative triboelectric charging layer, a ferroelectric composite material layer and a positive triboelectric charging layer; the ferroelectric composite material layer is prepared via casting method by mixing the ferroelectric material and the gas-sensitive material; the negative triboelectric charging layer has stronger electron affinity ability than the positive triboelectric charging layer, and attracts electrons from the positive triboelectric charging layer.