Nonlinear resistive strain sensor

By setting a conductive material on an elastic substrate, a nonlinear resistance strain sensor was designed, which solved the problem of insufficient sensitivity of linear sensors and achieved highly sensitive detection of minute strains, making it suitable for accurate monitoring of human health characteristics.

WO2026112897A1PCT designated stage Publication Date: 2026-06-04ASCEND TECHNOLOGY LTD
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
ASCEND TECHNOLOGY LTD
Filing Date
2024-11-28
Publication Date
2026-06-04

AI Technical Summary

Technical Problem

Existing linear strain sensors lack sufficient sensitivity to detect minute strain changes, making it difficult to meet the needs of detecting human health characteristics, especially in detecting subtle changes such as heart rate.

Method used

A nonlinear resistance strain sensor is designed by placing multiple conductive materials on an elastic substrate, so that the resistance changes nonlinearly during the stretching process. This includes the conductive materials being uniformly or fragmentedly distributed on the elastic substrate to form electrical conduction or gaps, thereby achieving a nonlinear response in sensitivity to strain.

Benefits of technology

The sensor's sensitivity at low input levels has been improved, enabling it to more acutely detect minute strain changes. It is suitable for detecting human health characteristics, especially subtle changes such as heart rate.

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Abstract

The present application mainly relates to a nonlinear resistive strain sensor. The nonlinear resistive strain sensor comprises an elastic substrate and conductive substances, and the conductive substances are uniformly distributed on the elastic substrate. When the elastic substrate is stretched, the length of the elastic substrate correspondingly increases, and the density of the conductive substances on the elastic substrate decreases, thereby changing the overall resistance of the nonlinear resistive strain sensor. In this way, the nonlinear resistive strain sensor of the present application has nonlinear highly-sensitive resistive strain performance.
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