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采用AVR单片机ATmegal28作为主控制器,取代C51系列单片机,设计了一套性能优良带有USB接口的杠杆式四球摩擦试验机测控系统。本文给出了ATmegal28控制转速、高速多通道模数转换及USB接口的电路原理简图。目前该测控系统已应用到杠杆式四球摩擦试验机中。
AVR microcontroller ATmegal28 as the main controller, instead of C51 series microcontroller, designed a set of excellent performance with a USB interface lever four ball friction test machine measurement and control system. This article gives ATmegal28 control speed, high-speed multi-channel analog-digital conversion and USB interface schematic circuit diagram. At present, the measurement and control system has been applied to the lever four ball friction testing machine.