| 摘要 |
PROBLEM TO BE SOLVED: To obtain an inexpensive seismic sensor capable of effectively controlling seismic information of the whole building with a simple structure. SOLUTION: The process recording section 6 comprises the function of performing a trigger judgment process, i.e., a trigger/detrigger function, for waveform data included in a sensing result signal. The trigger function judges that the earthquake happens when a waveform data value acquired from a seismic sensor 1 placed on a basement floor exceeds then the reference value for starting recording prespecified, and then starts the recording the sensing result signal and processing therefor. Then, when the process recording section 6 judges that the trigger is in the ON status, the section traces back by preset pre-trigger time (i.e., 20 to 30 seconds) and performs recording of a sensing result signal and processing thereof. COPYRIGHT: (C)2008,JPO&INPIT
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