METHOD AND SYSTEM FOR MEASURING STRAIN IN TWISTED CORD

摘要

8A method for measuring strain in a twisted cord is provided. The method includes the step of securing the ends of the twisted cord in respective cord grips in an initial state and taking a first digital image of at least a portion of the twisted cord in the unloaded state. Image data of the first image is analyzed to determine the number of twists per unit length in the first digital image. A load is applied to the twisted cord. A second digital image of at least a portion of the loaded twisted cord is then taken. The image data of the second image is analyzed to determine the number of twists per unit length in the second digital image. A parameter of the tensioned twisted cord is calculated using the number of twists per unit length in first digital image and the number of twists per unit length in the second digital image.