【摘要】 本文提出一种用于钢管自动生产线的数字平衡式自动称重系统。该系统采用ＶＦＣ与ＣＰＵ结合、Ｄ／Ａ反馈逐次比较法，设计新颖，充分利用ＭＣ６８０９微处理器的软硬件资源，实现了钢管重量的在线、实时、快速、高准确度的自动测量。更多还原

【Abstract】 Abstract In many automatic production lines,accurately weighing the products isvery important.Now a kind of digital servo evaluation system for the electromechanicalweigher used in weighing the steel pipes on the production line havebeen developed by theauthOrs,The V/F convertor with micro-processor MC6809, which gives a good environmentof software and hardware,and the feedback structure with D/A convertor are all used in thesystem,The digital servo evaluation system can accurately weigh the steel pipes on the pro-duction line in real- time, This paper will introduce its principle, composing of circuits,soft-ware and error analvsis etc.更多还原