超低烟尘等速采样控制系统研究  

Research on Constant Speed Sampling Control System of Ultra-low Dust

作　　者：张振兴 白相杰 彭海剑 汤征宇 王史峰 康杰[2] ZHANG Zhen-xing;BAI Xiang-jie;PENG Hai-jian;TANG Zheng-yu;WANG Shi-feng;KANG Jie(CECEP Talroad Technology Co.,Ltd.,Beijing 100085,China;Beijing Vocational College of Agriculture,Beijing 102442,China)

机构地区：[1]中节能天融科技有限公司,北京100085 [2]北京农业职业学院,北京102442

出　　处：《价值工程》2019年第1期123-125,共3页Value Engineering

摘　　要：针对目前抽取式超低烟尘检测仪的等速采样系统,设计了基于PID的闭环等速控制系统;采用静压平衡法,以stm32为主控器,微差压传感器为检测器,步进电机及针阀为执行器,通过控制射流器的流量,从而实现了闭环PID自动等速采样系统;实验数据表明,该自动等速采样系统完全符合目前对超低烟尘设备测量的要求,等速效果良好,误差低于8%;并介绍了系统的组成及软硬件设计。Aiming at the constant speed sampling system of ultra-low dust detector,a closed-loop constant-speed control system based on PID is designed.The static pressure balance method is adopted;stm32as main controller and micro differential pressure sensor as detector;the motor and needle valve are actuators.By controlling the flow of the ejector indirectly,the closed-loop PID automatic isokinetic sampling system is realized.The experimental data show that the automatic isokinetic sampling system fully meets the current requirements of ultra-low smoke equipment measurement,equal speed effect is good,the error is less than8%;and the system's composition and hardware and software design are introduced.

关 键 词：等速采样 静压平衡 步进电机 针阀 PID 

分 类 号：X85[环境科学与工程—环境工程]