抄録
This work is concerned with an experimental device which exhibits the characteristics of a horizontal seismometer with a long natural period using a gyroscope, the experimental device having demonstrated periods of 45 seconds and longer. This seismometer is called the gyro-transducer throughout this paper. The principles of operation described here have previously been presented. The gyro-transducer achieves long-period seismometer action through a gyroscope, an ordinary simple pendulum and an electronic feedback. With suitable device parameters the performance equations will be the same form as those of a conventional seismometer, the natural period and damping being functions of an amplifier gain. Experimental results obtained in the laboratory provide useful data to apply the gyro-transducer to a practical seismic observation system. The gyro-transducer is of interest, however, whether or not it finds use as a seismometer. It will be suggested that the principles described here should be applied to the highly precise gyroscope and the very sensitive sensing elements.
