摘要
ZD8B数字地电仪用 80 31单片机作为中心控制单元 ,ICL76 5 0、AD7710分别构成主放大器和A/D转换器。因ICL76 5 0具有崭波稳零和高输入阻抗的性质 ,AD7710内部∑ -Δ调制器和可编程数字滤波器可获得自动调零和较高的工频共模、串模抑制比及 2 4位的高分辨率 ,另外 ,ZD8B数字地电仪还配备了功能完善的运行软件从而获得了较高的性能。
The 8301monoprocessor is a very important central control unit for the digital ZD-8 geo-electric meter.ICL7650 is a main amplifier and AD7710 is an A/D converter. Because ICL7650 has a steady flow state and a high impede,the inter modulator Σ-Δ and program digital filter in AD7710 are capable of obtaining a stead flow with auto function and a common mode with high frequency.We use the software to control this unit and make it a stable working condition.
出处
《四川地震》
2001年第2期45-48,共4页
Earthquake Research in Sichuan
关键词
地电仪
地电阻率
电极
灵敏度
ground resistivity
terra-meter
geo-electric disturbance variation
sensibility
