红外测温仪抗干扰技术的研究

Research of Anti-interference Technique for Temperature Measurement by Infrared

抗干扰技术是智能仪表使用中需要考虑的问题,文中着重研究了红外测温仪中抗干扰技术的实现。对系统抗干扰设计包括硬件和软件抗干扰设计方法进行了阐述。说明了红外测温仪中看门狗技术的实现原理和功能,给出了看门狗监控电路与单片机的接口连接。对看门狗定时器的溢出时间和看门狗复位电路的时序进行了分析。详细阐述了看门狗电路复位技术的软件设计。并给出了看门狗技术实现的软件程序。这些硬件与软件抗干扰措施在产品实践中是有效的。

Anti-interference technique is the problem that is taken into account in the practical use for intelligent instrument. It stud ied realization of anti-interference technique for temperature measurement by infrared. The method of anti-interference technique of system including hardware and software anti-interference technique was expounded. The principle and function of watchdog timer were illustrated. The interface circuit for watchdog timer and single-chip microcomputer was given out. The output time and scheduling of the watchdog timer was analyzed.The software design of watchdog timer was expounded in detail and the software program was provided. These measures of anti-interference have been proved to be effective by practical application.