Equivalent resistance calculation of knitting sensor under strip biaxial elongation

A new theoretical model for predicting the electro-mechanical properties of knitting sensor is presented, which is focused on the relationship between the equivalent resistance and length resistance variation of loop segments under strip biaxial elongation. A resistance network based on yarn length resistance reveals how equivalent resistance to change with the increment of its numbers of course and wale. Besides, analytical equations are derived to calculate length of loop segments under relaxed state and strip biaxial elongation, respectively. It is the first time that the equivalent resistance calculating theory of knitting sensor under strip biaxial elongation has been established. By comparing the calculated results with the experiment data, it is found that fabric deformation related to the length resistance is the key factor affecting the equivalent resistance of knitting sensor.