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US 12,723,934 B2Granted
Fiber-based strain sensors and method of manufacturing the same
AssigneeUIF (University Industry Foundation), Yonsei University
InventorsHyun Jae Kim, Tae Yoon Lee, Won Kyung Min, Chi Hyeong Won
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Abstract
The present exemplary embodiments propose a fiber-based strain sensor including: at least one first electric conductive line including a first flexible part having electric conductivity and at least one second electric conductive line which is woven to be in partially contact with the first electric conductive line, includes a second flexible part having electric conductivity, and is implemented to conduct electricity with the first flexible part having electric conductivity in a stretched state.
Claims9
A fiber-based strain sensor comprising:
- at least one first electric conductive line including a first flexible part having electric conductivity;
- and
- at least one second electric conductive line which is woven to be in partial contact with the at least one first electric conductive line, including a second flexible part having electric conductivity, and being implemented to conduct electricity with the first flexible part having electric conductivity in a stretched state,
- wherein the at least one first electric conductive line and the at least one second electric conductive line form a physical structure comprising:
- a conductive part having electric conductivity formed by depositing metal nano particles inside the first flexible part and the second flexible part;
- and an insulator formed by depositing an insulating thin film on a surface of the conductive part,
- wherein the at least one first electric conductive line and the at least one second electric conductive line are implemented with a negative gauge factor (N-GF) configured such that current flows as the at least one first electric conductive line and the at least one second electric conductive line directly contact each other through a crack formed by the insulator only in the stretched state, and
- wherein a degree of causing a crack according to strain is adjusted by the insulating thin film having a preset modulus, thickness, or hardness through a curing process by selective irradiation of ultraviolet curing (UV-curing).
5 more elements
A monitoring system, comprising:
- a fiber-based strain sensor including:
- at least one first electric conductive line including a first flexible part having electric conductivity and at least one second electric conductive line which is woven to be in partial contact with the at least one first electric conductive line, including a second flexible part having electric conductivity, and being implemented to conduct electricity with the first flexible part having electric conductivity in a stretched state;
- a stretchable device to which the fiber-based strain sensor is applied and which is implemented to be stretchable by a motion;
- and
- a monitoring device which receives current generated upon stretching in a wired or wireless method to monitor the state of the stretchable device,
- wherein the at least one first electric conductive line and the at least one second electric conductive line form a physical structure comprising:
- a conductive part having electric conductivity formed by depositing metal nano particles inside the first flexible part and the second flexible part;
- and an insulator formed by depositing an insulating thin film on a surface of the conductive part,
- wherein the at least one first electric conductive line and the at least one second electric conductive line are implemented with a negative gauge factor (N-GF) configured such that current flows as the at least one first electric conductive line and the at least one second electric conductive line directly contact each other through a crack formed by the insulator only in the stretched state, and
- wherein a degree of causing a crack according to strain is adjusted by the insulating thin film having a preset modulus, thickness, or hardness through a curing process by selective irradiation of ultraviolet curing (UV-curing).
7 more elements
Dependencies are inferred from the claim text.