The Development of Yarn-Based Piezo-Resistive Sensors
Date Issued
2009
Date
2009
Author(s)
Huang, Ching-tang
Abstract
In the textile industry, smart textiles might break old tradition and become a new trend for the innovation application. The objectives of developing smart textiles should be not only including the traditional functions such as beautiful dresses, body covering, and keep warming, but also sensing the physiological signals and identifying the posture. So far, there are no promising solutions in developing such kind of smart textiles which can meet the human expectation. Furthermorey, non-washable, complexity of fabrication process, no favorable characteristics, low repeatability, low applicability for meeting the comfort and fashion purposes are the important topics which need further investigation and refinement. his dissertation proposes a new approach such that the above shortcomings can be resolved which can move a further step towards the practical application of smart textiles. The approach is unique and different from the previous method. It proposes the flexible yarn-based type as the fundamental structure of the sensor such as it can be applied to the subsequent processing and applications. The design can satisfy the requirements such as simple manufacturing process, washable, and the flexibility of comfort and fashion design.esides of the creativity, one of the contributions of this study is to find the double wrapping structure which is suitable for the yarn-based sensors. The developed sensor can provide high linearity and sensitivity such that better performance can be achieved as compared to the previous design with nonlinear properties. Furthermore, the design criteria for the yarn-based sensor are established in the study. Different parameters of the sensor such as linear density and the composition of core yarn and wrapping fiber are considered to be important factors in developing various types of sensor.inally, the developed smart textile sensor is applied to sense the human breathing signals. The feasibility is verified and the repeatability and life endurance are validated, too. The overall technique is summarized and proposed for the future research.
Subjects
piezo-resistivity
smart textiles
linearity
yarn-based sensor
flexible sensor
Type
thesis
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