基于单片机的GPS定位系统的设计

随着城乡基础设施的迅猛发展,道路状况变得复杂,有效掌握交通流量和保障车辆出行安全变得尤其重要。从车辆出行的准确定位需求出发,设计一款车载GPS定位系统,其以STM32F103为控制核心,利用SIM868模块进行GPS定位并转换为可靠的定位信息,通过GPRS通信将信号传输至One NET服务器,再通过APP方式将所有的经纬度信息及其他相关的功能信息传至用户的智能手机,使用户能更精准地查询和定位车辆,获取出行车辆的位置信息,有效保障用户的出行安全。

Integrated Monitor System of Water and Fertilizer of Greenhouse Intelligent Irrigatio

The integration of water and fertilizer is a comprehensive technology combined irrigation and fertilizer, which has outstanding advantages of saving fertilizer, saving water, saving labor, protecting environment, high yield and high efficiency. Currently, most of the water and fertilizer integrated irrigation and fertilization and irrigation operation in the production-based greenhouse is achieved relying on artificial experience, which is hard to achieve timely, scientific and intelligent irrigation. In this study, the application of STM32 embedded system realized the real-time collection of the data from the humidity sensors buried in top, middle and low depth of soil, and water and fertilizer integrated irrigation work was completed in the greenhouse through automatic control according to the predetermined fertilization and irrigation strategies for different crops. Moreover, the system had remote monitoring function, which used the global system for mobile （GSM） module to provide users with remote short message services, and therefore, the users could not only achieve the remote intelligent monitoring on the irrigation, light, ventilation of the greenhouse through short messages, but also could start and stop the remote control system operation, so as to realize the automatic management of the greenhouse environment, achieving the purpose of remote fertilization and water-saving irrigation.

基于STM32的步进电机控制程序设计

数字系统控制器是伺服系统中重要的组成部分,目前多选用DSP芯片作为控制器,但DSP芯片成本高,故需要选择一款性能出色且低成本的芯片作为替代。文章选用一种STM32芯片作为控制器,通过无线模块发送控制指令,STM32接收到指令并传输给步进电机的驱动模块,驱动模块发送指令给步进电机,并带动机械臂按指令方向进行运动。通过程序设计,实现了步进电机控制机械臂进行各方向的稳定运动,且控制精度良好。经实验验证,该控制器稳定性良好,步进电机运动的各项指标符合要求。