【作者】 郑保磊；

【导师】 张晓冬；

【作者基本信息】 北京交通大学 ， 电气工程， 2010， 硕士

【摘要】 高低温箱能提供一个高温环境和低温环境,使系统或电子元器件在模拟的高温、低温条件下进行性能试验。由于安全试验的需求,需要对数量较多的高低温试验箱进行集中监视和管理,并需要在无人值守的情况下进行电话报警,基于此本文设计了一种基于PIC单片机和CAN通信的监控系统。高低温箱监控系统,即开发用于对高低温箱设备的运行、故障、实时温度、功能状态等方面进行监视以及控制的智能装置,它可以全天候远程监控高低温箱系统的运作以及维护,对异常情况进行报警并采取相应的保护措施,给予高低温箱设备以及人员安全提供了可靠的保障。高低温箱监控系统具有电话报警功能,即使工作人员不在现场仍可收到报警信息,从而实现了高低温箱设备的无人值守。高低温箱监控系统在硬件上以美国Microchip公司推出的dsPIC30F6014A为核心处理器,主要进行数据的实时采集处理和高低温箱的故障保护,实时显示各高低温箱设备的运行参数和状态信息,并实现电话报警、历史记录及远程参数设定等功能。利用带有CAN接口的高性能的dsPIC30F6014A单片机设计了CAN总线接口,给出了CAN接口的硬件电路、软件流程。高低温箱监控系统由一个主控制单元和若干远程控制单元组成。远程控制单元负责高低温试验箱的温度采集和控制。主控制单元负责对数据进行存储、处理和分析。用户可以通过上位机中的人机界面对采集系统进行控制。目前设备已经投入运行,事实证明该设计具有结构简单、可靠性高、实时性强、性能价格比高等特点。更多还原

【Abstract】 The GDW can provide a high temperature and low temperature environment, the performance of the system or electronic components can be tested at the simulation of high and low temperature. As the demand of safety tests, we need a large number of GDW for centralized monitoring and management, it need telephone alarm in the absence of people on duty. For these reasons, The GDW monitoring system is designed based on PIC SCM and CAN bus communication.The GDW monitoring system, it was developed for the monitoring and control over the operation, the malfunction, real-time temperature, functional status of the GDW equipment. It can lift an all-weather remote monitoring system, operation and maintenance of abnormal situation in the GDW alarm and even executive automatic security operation given to the safety of GDW equipment and provide a reliable guarantee. With telephone warning function, even off-site staff can receive alerts, and realized the automatic monitoring without person long term of GDW equipment.The GDW monitoring system regards dsPIC30F6014A chip which MICROCHIP Company produces as the key processor on the hardware, it is mainly used to deal with trouble protection and gathering data in real time, the real-time configurable parameters and statistics can be shown, it can also realize the function such as telephone warning, history, and remote parameter setting. The high-capability dsPIC30F6014A SCM with CAN interface is used for designing the CAN bus interface. In this paper, the hardware circuit and the software flow are given.Monitoring system consists of a main control unit and a number of remote control units. The remote control unit is responsible for temperature measurement and control. Data is processed and analyzed by the main control unit. Users can control the system through the HMI in supervisory computer. At present, the equipment has been put into operation, it turns out that the design has the advantages of simple, high reliability, high real-time, high performance-price ratio.更多还原