| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain a seismoscope being set in a gas meter in order to detect earthquake in which an earthquake can be distinguished accurately from an impact. SOLUTION: The seismoscope comprises means 11 for detecting the peak value of a vibration waveform based on signals received from vibration detecting means 6, 7, 8, means 12 for detecting continuous variation of the peak value, means 13 for detecting the number of peak values within a predetermined time, and means 14 for determining abnormality based on the results from both means 12, 13. Abnormality can be determined accurately in a short time by determining continuous variation in the peak value of a vibration signal and the number of peak values within a predetermined time.</p> |
