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作 者:崔庆谷[1] 方伟[1] 党文杰 陈丽 CUI Qinggu;FANG Wei;DANG Wenjie;CHEN Li(Yunnan Earthquake Agency,148 Beichen Road,Kunming 650224,China)
机构地区:[1]云南省地震局,昆明市650224
出 处:《大地测量与地球动力学》2023年第8期856-860,共5页Journal of Geodesy and Geodynamics
基 金:国家自然科学基金(41874111)。
摘 要:利用垂直摆倾斜仪与地震计进行同点观测对比实验。将传感器输出信号统一采样后,以时域背景噪声包络为标准对数据进行统一量化,计算振幅谱,根据振幅随频率的变化判断2种仪器对不同信号的检测能力。在此基础上,以背景噪声、地震波、固体潮汐为天然测试信号测试2种仪器的检测能力。结果表明,对于固体潮汐所在的长周期频段的信号,垂直摆倾斜仪记录的振幅大于地震计,地震计在该频段的记录数据主要来源于仪器噪声;对于远震面波,2种仪器皆有较好的记录效果,其中垂直摆倾斜仪记录的振幅大于地震计;近震及地方震引起的高频地震动处于垂直摆倾斜仪设计的响应通带之外,数据可比性不大。The vertical pendulum tiltmeter and seismometer are used to observe the same point,the output signal of the sensor is sampled uniformly,and the data is quantified uniformly with the time domain background noise envelope as the standard.The amplitude spectrum is calculated,and the detection ability of the two instruments for different signals is judged according to the amplitude changes with frequency.On this basis,background noise,seismic wave and solid tide are used as natural test signals to test the detection capabilities of the two instruments.The results show that the amplitude recorded by the vertical pendulum tiltmeter is larger than that of the seismometer for the signal in the long period frequency band of solid tides,and the data recorded by the seismometer in this frequency band is mainly from the instrument noise.For far seismic surface waves,both of the two instruments have good recording effect,and the amplitude recorded by the vertical pendulum tiltmeter is greater than that of the seismometer.The high frequency ground motions caused by near and local earthquakes are outside the response passband of vertical pendulum tiltmeter design and the data are not very comparable.
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