An apparatus to monitor the circuit broking of digital telluric meter
Yuan Yan-ni · Earthquake Research in Sichuan · 2008
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.