公开(公告)号：US20240118122A1

公开(公告)日：2024-04-11

申请号：US18263573

申请日：2022-02-01

Applicant: UNIVERSITY OF WASHINGTON

Inventor： Praveen Kaliappan Sekar ,  Dayong Gao ,  Jae-Hyun Chung ,  Yanyun Wu

IPC: G01F23/263 ,  G01N33/487 ,  G01N33/49

CPC classification number: G01F23/266 ,  G01F23/268 ,  G01N33/48771 ,  G01N33/4905 ,  G01N2800/224

Abstract: A capacitive sensor system configured to measure capacitance, including a sample volume, a sample capacitive sensor configured to measure the capacitance of the sample volume without physical contact between the sample capacitive sensor and the sample volume, a control capacitive sensor, a differential sensing subsystem configured to measure a control sensor volume using the control capacitive sensor, and electrical circuitry connected to both the control capacitive sensor and the sample capacitive sensor.