牛奶乳漿濃度是生產奶粉過程中,產品質量和節能降耗的主要控制參數。提出了一種濃度在線測量的新方法,闡述了新型 低成本牛奶濃度傳感器———高精度的阻尼式波美度在線檢測裝置的研制,根據直流電動機在軟機械特性區轉速與轉矩的關系,建 立了濃度與轉速的測量模型。經實際運行,證明了該機電一體化裝置設計合理,分辨率達到了0104 波美度,高于國外的U 型管濃 度計的分辨率。
關鍵詞　阻尼　濃縮　傳感器　波美度　在線檢測　機電一體化
Abstract 　Milk density is the main parameter which has a direct influence on the quality of product s and the resource consumption and energy2saving. A new method of Baume degrees on2line measuring is given in the paper. The devel2 opment of high precision damping device for Baume degrees on2line measuring ,which is a new low cost milk density
sensor ,is described in this paper. Through analysing the relationship between the rotational speed and moment of the DC motor which works in the soft mechanical property area ,a measurement model for density and rotational speed is found.By practical running this elect romechanical design is proved reasonable with the resolving power 0. 04 Baume degrees ,which is more precise than the U2shaped tube density meter abroad.
Key words 　Damping 　Concent ration 　Sensor 　Baume degrees 　On2line measurement 　Elect romechanical