No abstract

This paper suggests design method for input interface of cam shedding mechanism under multiple working conditions and multiple types of machine according to the process requirement on loom shedding mechanism for compatibility to multiple working conditions and multiple types of machine as well as motion coordination, and describes the relation between number of heddle frame and tooth number of gear for change, gives the standard center distance for corresponding number of gear teeth, establishes the model of output unit of cam shedding mechanism, and whereby educes the calculating method of shedding cam design parameters and the design idea on seriation of cam shedding mechanism, meanwhile determines adaptive fabric textures of cam shedding mechanism as well as each suitable type and number of cam.

Basing on an analysis on the motion cycle switching of yarn splicing device and tube changing device of an automatic twisting winder using ratchet-pawl clutch, this paper studies the self-locking conditions of the ratchet-pawl clutch, the rotation angle and revolution angle for separation of the pawl, the pawl escapement and the pawl disk locating device, gets the calculation method and design formulas for functional parameters of the ratchet-pawl clutch, and finds out the conditions for whole circle rotation and precise locating of the pawl disk.

This paper compares capacitive and photoelectric method for measuring yarn evenness, and presents a new yarn unevenness on-line measurement system to detecting accurately yarn appearance diameter. By means of researching coefficient of diameter variation and mass variation, the relation model of variation coefficient is established, and the experimental data shows excellent correlation between coefficient of diameter variation and coefficient of mass variation and approximate linear relationship. The laser on-line measurement system of yarn evenness can accurately measure yarn diameter and calculate the coefficient of variation, which is suitable for the production field measurement.

Three-dimensional measurement with reflection suppression based on high-Three-dimensional measurement with reflection suppression based on highdynamic range images dynamic range images