基于SOPC的定量称重控制系统的设计与实现

针对全自动定量称重控制系统所要求的高精度、高可靠性、多功能等特性，给出了基于多Nios Ⅱ嵌入式软核处理器的全自动定量称重控制系统的可编程片上系~（SOPC）软硬件设计方法。采用称重传感器、模数转换器AD7730、去极值平均滤波算法和预测控制算法，实现了颗粒、粉末状等物料的高精度测量及自动包装控制。该系统具有开发周期短、成本低、可靠性高、易于扩充等特点，现场测试结果表明，系统测量称重误差小于0．2％。

The Design and Implementation of a Weighting Control System Based on SOPC

For the needs of high accuracy, high reliability and muhifunction of a weighting control system, the software and hardware design methods of a SOPC based on multiple Nios II Embedded softcore CPUs are given. Weighing senor,A/D converter AD7730, the mean filter algorithm which can remove extreme values and the predictive control algorithm are used to implement the high pre- cision measurement and the automatic pack control of the pulverized material. The system has the advantages of low cost, high stabil- ity, short development period and good extensibility and so on. The field test result indicates that the weighting error of the system is less than 0.2%.