The Research of Eiderdown Quantitative Conveying and Automatic Weighing Method Based on PLC Control

摘要

The key problem during the process of dynamic quantitative weighing for eiderdown outwear lies in the optimization and balance of weighing precision and weighing speed, regarding which a kind of method of quantitative conveying and automatic weighing was designed in this paper. Using pneumatic conveying method of controlled by PLC, variable airflow pressure was controlled by PLC through dual to adjust the conveying speed of down feather by time interval, a weighing sensor was applied to make a feedback on the real-time weighing data, and the timely changing-over of air channel was controlled by PLC. The weighing experiment was conducted when the combination of different weighing values and different pressure values and different percentages, least squares fit was conducted to gain the function relationship between air pressure and time and find out the optimal air pressure value available under quantitative weighing; in addition, PLC programming was applied to realize the control automatic switch over of air flow passage, finally rapidly and precisely weighing down feather.