【摘要】 为了让地震台站工作人员随时知道地电阻率仪器外线的工作情况,研制了外线断线监测仪。当地电阻率仪器的这些户外架线一旦断开,外线断线监测仪就发出声光报警信号,提醒地震台站工作人员,以便在最短时间内恢复线路。外线断线监测仪的硬件由AT89C2051单片机、SD2300A时钟芯片、多路切换开关电路、外线检测信号源、报警检测逻辑电路以及电源等组成。单片机的程序采用循环查询的设计思路,程序根据读出的时间数据,实现了地电阻率仪与外线断线监测仪之间的协调工作。更多还原

【Abstract】 In order to know work condition of outlines of the digital telluric meter in a seismic station,an apparatus to monitor the circuit breaking is designed.When the outline circuit is broken,one of the relative indicators shines.The apparatus consists of AT89C2051 single chip,SD2300A clock chip,swatch of multi-pathway,sign generator,alarm logical circuit,and power block.The program in the single chip uses the loop inquiring method to read the time data.The cooperation between observing and monitoring is implemented.更多还原