摘要
尿素喷射量的控制精度决定了SCR系统的后处理效果。而尿素泵的控制参数、喷嘴的驱动参数及流量特性对实际尿素喷射量有重要影响,需要进行标定。设计开发的尿素喷射标定系统硬件采用模块化设计,增强了电路的稳定性和抗干扰性。下位机软件应用PID算法迅速稳定管路压力,上位机软件基于LabVIEW开发平台,将生产者一消费者循环和队列模式相结合,有效的解决了数据接收和处理上的问题。通过实验,可以确定最佳的控制参数,并取得了良好的应用效果。
The emission control effects of SCR system depend on the control accuracy of urea injection,which is significantly influenced by the control parameters of urea pump,drive parameter of nozzle and flow characteristics and is bound to be calibrated.The designed and developed hardware of urea injection calibration system was applied with the modular design to enhance the stability and interference immunity of the circuit.The lower computer is equipped with PID algorithm to stabilize the line pressure,and the upper computer software is based on the Lab VIEW development platform to combine the producers-consumers cycle and queuing model to solve the problems of data receiving and processing effectively.Through the experiment,the optimal control parameters can be ascertained as well as favorable application outcome can be verified.
出处
《仪表技术与传感器》
CSCD
北大核心
2015年第9期80-83,共4页
Instrument Technique and Sensor
