基于PIC单片机的奶粉密度计开发

奶粉密度计是测量奶粉振实密度,保障奶粉质量的关键仪器。目前,该类产品在乳品行业有着广泛的应用。设计开发了一种新型奶粉密度计,该仪器采用PIC单片机作为控制核心,步进电机作为动力源,同时采用L297/L298芯片作为动力源驱动模块,键盘与12864液晶作为人机界面。其振动幅度固定,振动频率可调,操作简便。振实实验表明:该仪器人机界面友好,运行稳定、可靠,工作流程符合ISO08967国际标准,满足奶粉等颗粒状物体的振实密度的测量要求,完全具有实际应用价值。

Development of milk powder densitometer based on PIC MCU

Milk powder densitometer is a key device which is used to measure the tap density of the milk powder,and guarantee the quality of the milk as well that is now widely used in the dairy industry.In this thesis a new kind of milk powder densitometer is designed and developed with PIC MCU as core of the control system,step-motor as the source of the power.At the same time chip L297/L298 is applied as drive module of power source with keyboard and LED as the interface of human-computer,which vibration amplitude is constant and frequency is adjustable so that the manipulation is simple.The tamping vibration experiments prove that the device can run stably and reliably with friendly human-computer interaction interface.The working process meets the regulation of ISO08967 and satisfies the requirement of density testing of the particles material,therefore it is valuable in practical application.