Knitted flexible sensor used for measuring two-way stretching strain and manufacturing method of knitted flexible sensor

Abstract

The invention relates to a knitted flexible sensor used for measuring two-way stretching strain and a manufacturing method of the knitted flexible sensor. The knitted flexible sensor comprises an upper sensor layer region, a lower sensor layer region and a connection region, wherein the upper sensor layer region is composed of a sensor transverse-column region and non-sensor transverse-column regions, and the sensor transverse-column region is not connected with the non-sensor transverse-column regions in the longitudinal-row direction; the lower sensor layer region is composed of a sensor longitudinal-row region and non-sensor longitudinal-row regions, and the sensor longitudinal-row region is not connected with the non-sensor longitudinal-row regions in the transverse-column direction; the sensor transverse-column region and the sensor longitudinal-row region are composed of conductive yarns; no yarn is connected between the upper sensor layer region and the lower sensor layer region; the connection region is connected with the upper sensor layer region and the lower sensor layer region respectively. The knitted flexible sensor has the advantages of being good in structural integrity, extensibility, elastic resilience and reproducibility, and easy and convenient to manufacture, can be arranged on clothes in a knitted mode so as to measure longitudinal and transverse strain of clothes under a two-way stretching condition respectively, and can monitor postures, actions and physiological indexes such as heartbeat or respiration of the human body.

Description

technical field [0001] The invention relates to a knitted flexible sensor and a preparation method thereof, in particular to a knitted flexible sensor for measuring bidirectional tensile strain and a preparation method thereof. Background technique [0002] Knitted flexible sensors can be woven or integrated on clothing to form wearable strain sensors to monitor physiological indicators such as heartbeat and respiration of the human body. [0003] In the prior art, Chinese Patent No. 200610147211.3 discloses a strain-type flexible breathing sensor for electronic fabrics and its application. The sensor includes a sensor in the form of a woven or knitted fabric with elastic conductive fibers and insulating fibers. components and have leads or connectors for electrical connection. When the sensitive element of the sensor is subjected to tension (such as chest movement caused by respiration) to generate strain, the resistance value of the conductive network composed of conducti...

AI Technical Summary

Problems solved by technology

The disadvantage of the above sensor is that when the sensitive element of the sensor is subjected to two-way strain caused by vertical and horizontal bidirectional stretching, the conductive network composed of conductive fibers can only reflect a change in resistance value, so it is impossible to distinguish and measure the changes occurring in the longitudinal and transverse directions respectively. strain

Images