用单片机实现自动报警系统

介绍一种以单片机为核心的供、配电设备的自动报警系统。系统可提供24路开关量信号的程控报警，具有故障声光报警、报警消除、试验、复位及工作状态指标等功能。系统输入输出采用8255配合62083驱动器来驱动固态继电器以给出110V直流连锁信号。看门狗电路的加入，使系统避免程序运行混乱，保证系统正常工作。在程序设计时，为保证系统可行运行，采用了指令冗余软件陷阱技术。电路设计合理，结构紧凑，报警过程迅速准确，并可为上位机提供接口信号，同时给出连锁报警信号。经现场运行证明，是一种很适用的报警装置。文章具体介绍系统的硬件组成和软件设计。

An automatic alarming system with single chip microprocessor

This paper introduces an antomatic alarming system with single chip microprocessor for supplying and assembling the power device. This instrument can provide programmable alarming for 24 channels switch signals. It also has the function of sound-light fault alarming, alarm deleting, trial, reset and operational state indication etc. The system input and output may provide 110 VDC interlocking signal by driving solid relay with 8255 chip and 62083 driver. Adding the watchdog circuit, the system can avoid program operation confusion and assure the system operation normal. In program designing, we adopt instruction redundancy and software trap to guarantee the system work reliably. For the proper circuit design and the compacting constitution, the alarming process is smart, correct and provide interface signals for supervisor and interlocking given at the same time. It can be proved by online operating that the alarming instrument is efficient. This paper concretely introduces the system hardware constitution and software design.