基于STM32的多功能流量计控制仪表的设计

Design of Multifunctional Flow Control Instrument Based on STM32

多功能流量控制仪是一种智能化二次仪表。该仪表采用DM12864M中文字库液晶屏,ARM内核的STM32f103做为主控芯片,AD694做为4~20 m A电流输出芯片,特殊的瞬时流量算法,克服了传统中数码管显示不直观、普通单片机机器周期太长,控制仪反应不快捷、电流输出不准确、瞬时流量不稳定的特点。该控制仪与脉冲式电信号的流量计配套,在配合电液阀实现液体介质的精确自动化定值体积或质量的灌装目的。实际使用过程中,在智能化、显示直观性、操作便利性、灌装精度等方面取得了良好的效果。

The multifunctional flow control instrument is a kind of intelligent secondary instrument. The instrument adopted the DM12864 M LCD screen of Chinese fonts,using the STM32f103 ARM kernel as its main control chip,and the AD694 as 4 ~ 20 m A output current chips. Special instantaneous flow algorithm was used in order to overcome the problems that the display of traditional digital tube was not intuitive,the machine cycle of ordinary MCU was too long,the control instrument responded insensitive,current output was not accurate,and the instantaneous flow was unstable. The control instrument combined with flow meter of pulse electricity output signals and electro-hydraulic valve to realize volume or weight automatically loading of the liquid medium. In the process of actual use,the controller has obtained a good effect on intelligentialize,visual display,operation convenience,accuracy and so on.