流料测量系统设计

design of floating material measuring system

针对一般系统对流动物料的重量采用动态测量原理精度不高的问题,提出动态和静态交替测量的设计原理。介绍了实际控制电路设计与调试;论述了软件设计思想与实现方法。通过对前向通道理想化线性处理和校准表实际测试,解决了动态测量要求速度快与静态测量追求精度高的问题;采取电容滤波、改进型竞赛评分数字滤波以及分段线性插值计算等方法,使系统对流动物料的测量精度几乎达到了与静态物料测量相同的效果。系统投入运行至今,稳定、可靠,精度满足要求。

This paper proposes a new design principle combined with dynamic and static alternating measurement methods as to improve the inaccuracy condition of the existing dynamic measurement for the weight of floating materials. We introduces the design and the testing process for real control circuits, and describes software designs and related implementation methods. The idealized linearity processing for forward channel and the actual testing of calibrating apparatus contribute to the realization of fast detecting speed in dynamic measuring and high precise in static measuring. By using methods including capacitance filtering, improved competitive scoring digital filtering and segment linear insertion value algorithm, the system can get almost the same precise in measuring the weight of floating materials with measuring the static one. This system has distinguished itself by satisfactory stability and accuracy since being put into use.