Search International and National Patent Collections

1. (WO2018197355) STRAIN SENSOR COMPRISING A VISCOUS PIEZORESISTIVE ELEMENT

Pub. No.:    WO/2018/197355    International Application No.:    PCT/EP2018/060171
Publication Date: Fri Nov 02 00:59:59 CET 2018 International Filing Date: Sat Apr 21 01:59:59 CEST 2018
IPC: G01L 1/16
Applicants: NOKIA TECHNOLOGIES OY
Inventors: O'CONNELL, Diarmuid
JEFFERS, Nicholas M.
BURNS, Oliver
Title: STRAIN SENSOR COMPRISING A VISCOUS PIEZORESISTIVE ELEMENT
Abstract:
A strain sensor comprises a viscous piezoresistive element embedded or encapsulated within a solid, flexible, resilient packaging element, and contact means contactable from the exterior of the strain sensor and defining an electrical path through or along at least a portion of the viscous piezoresistive element, the resistance of the electrical path varying with deformation of the strain sensor. The invention allows the high gauge factor of a viscous piezoresistive material to be taken advantage of in a practical device by containing the material within a packaging element. The packaging element ensures a consistent output response as a function of deformation of the strain sensor and enables the strain sensor to detect time-varying forces due to the resilient nature of the packaging element.