基于单片机的昆虫热特性测量控制系统的设计

为了研究昆虫的热特性,以单片机、可控硅及DS18B20数字温度传感器为核心设计了一套昆虫热特性测量控制系统。其中,采用DS18B20数字温度传感器采样被检测的温度,以可控硅过零触发调功方式调节加热板的加热速率,分别用C语言和VB 6.0设计了相应的单片机程序和人机交互界面。该系统人机界面友好,能实时显示昆虫在加热过程中的温度并能绘制出温度随时间变化的曲线。     

THE INVESTIGATION AND DEVELOPMENT OF CONTROLLED TEMPERATURE SYSTEM WITH MICROCOMPUTER

This paper introduces a controlled temperature system in which the silicon controlled rectifier is controlled by a TP-801 microcomputer. A common-used PID expression is usually applied to control temperature, but it is necessary to adjust three parameters, making the operation quite inconvenient. This system adopts the measurement of a simplified expanded-critical proportion, only one parameter is necessarily adjusted. In addition, the method of digital triggering is applied so that the D/A transfer and silicon adjuster are omitted, thus decreasing the cost and increasing the reliability of operation. This system has higher precision of control and better degree of linearity of temperature increment or decrement.     

马铃薯动态分级系统中多目相机同步采集方法

针对马铃薯动态分级系统中的图像同步采集问题,提出了基于千兆以太网的三目相机同步采集方法.采用3台相机分别从待测马铃薯3 个方向进行同步采集,利用LM358 设计一级同相电压放大电路将STM32 产生的PWM 信号放大来控制3 部相机同步工作,使用C++语言在Visual Studio 2013 平台上进行二次设计与开发...