In order to solve the problem of suture diameter inhomogeneity caused by slow and imprecise wire diameter detection and uncontrollable forming process, a control system is designed by a rapid measurement and accurate control method. The system, based on the embedded system STM32, consists of a linearly coupled charge-coupled device (CCD) image sensor, 14-bit CCD signal processor AD9822, direct memory access (DMA), and improved adaptive generalized predictive control (GPC) algorithm. The suture samples satisfying the requirements of the 32th United States Pharmacopoeia Suture standard have been produced on the JK1601 spinning machine by the control system, and the uniformity of the wire diameter has increased from 74.6% to 95%.
WANG Deming, SUI Xiuwu, ZHANG Yang, WAN Kaixin, SHI Feng
. Diameter Control Technology of Ultra-fine Sutures Based on DMA and Improved GPC Algorithm[J]. Journal of Applied Sciences, 2019
, 37(3)
: 349
-358
.
DOI: 10.3969/j.issn.0255-8297.2019.03.005
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