Design of Double Closed Loop for Granular Material Automatic Weighing System
The weighing of granular materials is generally implemented through the detection and control of weighing instruments, which control the vibration intensity according to the weight of incoming material measured by the sensor, and finally assure the material weighing accuracy under certain speed. Vibration feeding equipment is classified into crude feeding and fine feeding. The former is at high rate but with less accuracy while the later is with high accuracy but at lower rate. The final weighing accuracy depends on the aerial weight of material during fine feeding process. The aerial weight can be set, but is still influenced by many factors. Here, in this paper, these factors will be discussed and analyzed. Furthermore, an instrument of dual close-loop of accuracy and feeding rate was designed. This instrument adopts STM32 microcontroller as the processor and applies high-speed 24-bit AD conversion chips in the analogue sampling part and performs well in practical application, solving the longstanding practical difficulties that easier to control static accuracy while hard to control dynamic accuracy.
automatic weighing aerial weight double closed-loop weighing accuracy weighing speed
Zhang Dong
Shanghai Vocational College of Science & Technology, shanghai, China
国际会议
重庆
英文
1127-1135
2015-12-18（万方平台首次上网日期，不代表论文的发表时间）