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本文对中国制造的电流计记录式加速度仪RDZ1-12-66记录的振幅失真校正方法进行了改进,针对微分-积分运算过程,提出:第一,用一种新的微分变换公式代替目前通用的中心差分法,对于采样率为100点/秒的等间距离散化加速度记录,校正频率可以高达45赫兹,并具有较高的精确度;第二,在进行仪器失真校正运算之前,对积分所得位移数据先进行一次基线修正,消除长周期误差对仪器修正计算的影响。实际处理结果表明,该方法能更有效地校正仪器的失真和充分保留记录中有价值的高频分量。
In this paper, we improved the amplitude distortion correction method of ammeter accelerometer RDZ1-12-66 recorded in China. According to the differential-integral operation process, we proposed the following: First, we use a new differential transformation formula to replace the current common The central difference method, for the sampling rate of 100 points / sec discrete recording acceleration acceleration, the correction frequency can be up to 45 Hz, and with higher accuracy; Second, before the instrument distortion correction operation, the integral displacement The data is first baseline corrected to eliminate the effects of long period errors on the instrument correction calculations. The actual processing results show that this method can more effectively correct the distortion of the instrument and preserve the valuable high-frequency components of the record sufficiently.