Passive and wireless pressure sensor

US9848775B2 · kind B2 · utility

Assignee

• The Board of Trustees of the Leland Stanford Junior University · US

Inventors

• Chee Keong Tee · Singapore, SG
• Lisa Yun Chen · San Francisco, US
• Zhenan Bao · Lyndhurst, US
• Darren J. Lipomi · San Diego, US
• Michael V. McConnell · Stanford, US
• H.-S. Philip Wong · Stanford, US

Key dates

• Filing date: May 22, 2014
• Grant date: Dec 26, 2017
• Expiry date: Dec 20, 2034

Classification

• Technology area (CPC G): Physics
• CPC primary: G01L9/12
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

Aspects of the present disclosure are directed to pressure sensing. As may be implemented in accordance with one or more embodiments, an external energy field is applied to a resonant circuit having inductive conductors separated by a compressible dielectric, for wirelessly detecting pressure. Specifically, the resonant circuit is responsive to the energy field and applied pressures by operating in respective states exhibiting different resonant frequencies that are based upon pressure-related compression of the compressible dielectric. These resonant frequencies, or a change in the resonant frequencies, can be used as an indication of the pressure.