| 摘要 |
<p>PROBLEM TO BE SOLVED: To easily determine the operating condition and accuracy of a seismometer by a method wherein a vibrator is connected to a pair of slide bases 1 always linked to each other where a seismomerter is installed to apply vibration and a calibration value is determined based on a measured value from the seismometer and a reference value. SOLUTION: Upper and lower slide bases 2 and 3 always linked to each other by a link device 4 are placed on an installation foundation part 1 and a vibrator 6 is linked to the base 3 with a link device 8 of an arm 7. The linking of the device 4 is released in the vibrator 6 by a link releasing signal or the like from a signal transmitter 10, the device 8 is linked thereto and the device 6 applies vibration equivalent to earthquake acceleration to the base 3. Measurement data of the vibration of the semisometer 5 on the base 3 are sent to a data processing section 24 via the device 10. A data gaining means 242 for calibration compares the data with a reference value data previously stored to define a deviation thereof as data for calibration. In the normal operation, an earthquake motion data processing means 246 calibrates the measurement data of the seismometer 5 by a corresponding data for calibration to determine a true earthquake motion data.</p> |
