甚宽频带地震计频域标定的相关处理技术——用正交相关法提高大噪声条件下正弦波标定的精度

¹ 中国地震局地震研究所,武汉市洪山侧路40号,430071;² 中国地震局地壳应力研究所武汉科技创新基地,武汉市洪山侧路40号,430071;³ 地壳运动与地球观测实验室,武汉市洪山侧路40号,430071;

基金项目: 中国地震局“九五”重点计划资助项目(95010102,95010110)

详细信息

Correlation Processing Techniques in Frequency-domain Calibration for Very Broadband Seismometer—Raising Sinewave Calibration Precision Under Strong Noise by Using Vertical Correlation Method

¹ Institute of Seismology, CEA, 40 Hongshan Road, Wuhan 430071, China ;² Wuhan Base,Institute of Crustal Dynamics,CEA, 40 Hongshan Road, Wuhan 430071, China ;³ Crustal Movement Laboratory, 40 Hongshan Road, Wuhan 430071, China

Funds: 中国地震局“九五”重点计划资助项目(95010102,95010110)

摘要: 研究了正交相关法的数学原理,给出了仿真计算与测试应用的实例。结果表明,正交相关法具有很强的噪声抑制能力,克服了大噪声对标定精度的影响,大大提高了甚宽频带地震计的频域标定精度。
- 甚宽频带地震计 /
- 频域标定 /
- 正交相关法
Abstract: In this paper, a new correlation processing method-vertical correlation method is presented. A mathematics principle of vertical correlation method is studied and examples of simulation and application are given. The results show that vetical correlation method has strong noise-reduction ablity, eliminates strong-noise’s influences to calibration precision and raises greatly frequency-domain calibration precision for very broadband seismometer.
- very broadband seismometer /
- frequency-domain calibration /
- vertical correlation method