【摘要】 数字检波器通常指基于微电子机械系统的加速度计,是地震采集中的最新技术,本质上也是由振动传感器和数字化电路两部分构成,其重要特征是在检波器内部进行模/数转换,实现检波器数字信号输出。将模拟检波器加上数字化芯片即对其直接数字化,同样可以达到比较好的效果。本文介绍了陆上常用模拟检波器的直接数字化方法,通过实例分析了数字传输对提高模拟检波器记录能力的重要作用。实践证明,模拟检波器经直接数字化后减小了高频传输损失、增强了弱小地震信号的记录能力、拓宽了地震记录的频率范围,因而改善了地震资料的品质。更多还原

【Abstract】 Digital sensors based on micro mechanical systems(MEMS) accelerometers are the newest technologies being used in seismic acquisition.Digital sensors are essentially make up of sensors and digitizers,its important character is finishing A/D conversion within sensors and output is digital signal.Adding digitizers to analog geophones achieve same effect as well.This paper introduces a method to immediate digitizing some kind of common used land geophones,through analysis of real data,demonstrating that immediate digitization of the common used land geophones lower transmission loss,strengthen weak signal recording ability,widen its frequency band,improve seismic data quality as a result.更多还原