异构总线多协议网关设计及其在电除尘监控系统中应用

针对工业网络通信中多种现场总线存在的异构性,提出了一种新的多协议转换通信模型,设计了异构总线多协议网关;采用数据映射和命令缓冲方法,实现了在过程级和现场级两级总线之间的异步访问,有效提高了通信转换效率.对过程级监控设备中数据刷新速度的分析及所设计网关在电除尘监控系统中的应用表明:所提出的异构总线多协议网关设计方法可避免过程级异构总线设备同时访问现场设备时的通信冲突,能够有效减小系统采集周期,并能充分发挥过程级总线高速通信的优势.

Multi-protocol gateway design for heterogeneous field buses and application in electrostatic precipitation supervision system

There exist preprocessing operations, such as the regularization and parameterization of unorganized sampling points in conventional B-spline curve reconstruction. If using the deformable template-based reconstruction method, such disadvantages in conventional B-spline reconstruction method can be effectively avoided. To achieve this goal, a reconstruction method of sectional contours based on deformable template is proposed for the given design template and measured sectional points of complex sectional contours, and the matching and reconstruction model of sectional contours is established under the condition of minimizing the deflection of design template. The alternative iteration optimization strategy of the precision matching and constrained deflection of design template, as well as the rapid algorithm of distance calculation based on the recursive subdivision, ensures the reconstruction accuracy and efficiency, including the minimization of template deflection. Meanwhile, the analytic relationship between the design template and real sectional profile is also built. The feasibility and effectiveness of the proposed method is finally validated by the given example.