摘要:本文根據(jù)食品醫(yī)藥制粒工藝研究的需求，設計了一種新型小型高速混合制粒機，用于一次性完成混合、加濕與制成顆粒等多道工序的新型小型化自動制粒設備，其方法是將物料粉末和輔料加入容器內(nèi)，攪拌均勻后加入粘合劑高速切割制粒。該設計包括整體結構及計算機自動檢測與控制系統(tǒng)。經(jīng)過大量實驗并結合特定的工藝要求得出了，針對不同的物料配方與之相應的最佳操作參數(shù)。實驗證明，該裝置具有良好的控制系統(tǒng)，自動化程度高，與傳統(tǒng)的實驗室手動設備相比，制粒效率高、操作簡便，且所制顆粒均勻、批次穩(wěn)定，并完成了所有重要的設計，是測控技術與生化工程新工藝研究的良好結合。

本文的主要研究內(nèi)容有：

   1. 介紹了小型高速混合制粒機的制粒原理，并根據(jù)要求完成了制粒機的機械結構設計，包括攪拌槳和制粒槳的形狀與工作位置；攪拌槳與攪

拌電機及制粒槳與剪切電機的同軸連接；

   2. 確定并設計了自動控制方案，包括以 ATmega32 單片機為核心的控制電路的設計和相應的軟件程序的編寫，以實現(xiàn)混合容器內(nèi)溫度的非接觸實時測量及攪拌槳與制粒槳轉速的測量與控制等；

   3. 實現(xiàn)了控制板與 PC 機的通信，并采用 Lab VIEW編程設計了人機界面，在PC 機上實時顯示容器內(nèi)溫度、電機轉速及時間等參數(shù)，方便數(shù)據(jù)的存儲與

分析；

   4. 針對混合容器內(nèi)不同物料的特性，進行小型高速混合制粒機最佳控制參數(shù)的分析，并確定操作標準流程。

關鍵詞：小型高速混合制粒機 ATmega32 電機控制 混合均勻度 粒度分布

Abstract:According to the need of medicine pelletisation, a New-style Miniature High Shear Granulator （MHSG）is designed, which is a kind of automatic pharmacy equipment to mix, to wet, to granulate at one time. This equipment includes Mechanical Configuration and Measuring and Controlling System. For technologic needs, the experiments present the relevant data corresponding different composition.Compared with a process operating by hand, the equipment shows high automation and efficiency, its product have proportioned granule in shape, similitude granularity in size. To this day, the equipment mode has been finished at whole, which program has become combining production between the measurement and control technology and the biochemistry engineering technology.

The paper’s content includes four aspects as follows:

    1. Having introduced the principle of MHSG, and according to technologic needs,finishing the Mechanical Configuration design, machining and fixing, including the shape and relevant position of impeller and chopper, the joint of impeller and mixing motor, and the joint of chopper and cutting motor;

    2. Having designed the automatic controlling scheme, including the controlling circuit design based on the ATmega32, PCB design and software design, implementing the real-time measure of temperature in mixing vessel, the testing and controlling of impeller and chopper speed;

    3. Having implemented the communication between controlling board and PC,designed the interface between human and computer adopting Lab VIEW, which displays the parameters such as temperature, motor speed and time, in order to favor data storage and analysis;

　　4. Aiming at the characteristic of different materiel, having finished the experiment and data analyze, and eventually confirmed the operation flow.

　　Keyword: MHSG ATmega32 motor controlling mixing proportion granularity distribution