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DD-1地震仪是我国台站目前使用广泛的短周期地震记录仪器,地震计是地震仪器系统中重要的拾取地面震动的传感器。因此能迅速有效、而且是作为“不脱机的”标定地震计,在实践上和理论研究上都是很有意义的。本文通过一个实地试验,扼要地说明使用二元伪随机信号能很好地标定在20Hz范围内、频率分辨率达0.1Hz的DD-1-08~#地震计的幅频特性和相频特性试验过程和结果。
DD-1 seismometer is the most widely used short-period seismograph in our country. Seismometer is an important sensor to pick up ground vibration in seismic instrument system. So it can be quickly and effectively, and it is very meaningful as a “non-offline” calibration seismometer, both in theory and in practice. In this paper, a field experiment is conducted to summarize the amplitude-frequency characteristics and phase-frequency characteristics of a DD-1-08 ~ # seismometer that can be well calibrated with a binary pseudo-random signal within the range of 20 Hz and a frequency resolution of 0.1 Hz Process and result.