Patent · US Active

Strain sensor comprising a viscous piezoresistive element

US11060927B2 · kind B2 · utility

0Cited by

5References

16Claims

0Family size

Assignee

NOKIA TECHNOLOGIES OY · FI

Inventors

Diarmuid O'Connell · Athy, IE
Nicholas Jeffers · Wicklow, IE
Oliver Burns · Dean Hill Cross, IE

Key dates

Filing date	Apr 20, 2018
Grant date	Jul 13, 2021
Priority date	—
Expiry date	Apr 20, 2038

Classification

Technology area (CPC G)Physics
CPC primaryG01L1/18
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A strain sensor includes a viscous piezoresistive element embedded or encapsulated within a solid, flexible, resilient packaging element, and a contact 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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.