SEISMIC SENSOR AND EARTHQUAKE DETERMINATION METHOD

Title:

SEISMIC SENSOR AND EARTHQUAKE DETERMINATION METHOD

Document Type and Number:

WIPO Patent Application WO/2019/003505

Kind Code:

A1

Abstract:

Provided is a technique whereby erroneous determination of noise as an earthquake in a seismic sensor can be more reliably suppressed. A seismic sensor for operating in a power saving mode and a measurement mode having greater power consumption than the power saving mode, the seismic sensor having a measurement unit for measuring an acceleration, an earthquake determination unit for transitioning from the power saving mode to the measurement mode when the acceleration measured by the measurement unit exceeds a predetermined threshold value and determining whether an earthquake has occurred on the basis of the acceleration measured in a predetermined determination period after the transition to the measurement mode, and an index calculation unit for calculating an index value indicating the scale of the earthquake in an earthquake processing period after the determination period when the earthquake determination unit determines that an earthquake has occurred, the earthquake determination unit determining the occurrence of an earthquake on the basis of the presence or absence of a pulse waveform in the waveform of the acceleration measured in the determination period and/or a frequency characteristic or convergence characteristic after the pulse waveform in the waveform of the acceleration.

Inventors:

MINO HIROYUKI (JP)
UEDA NAOTSUGU (JP)
SUZUKI MASAKAZU (JP)

Application Number:

PCT/JP2018/009371

Publication Date:

January 03, 2019

Filing Date:

March 12, 2018

Export Citation:

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Assignee:

OMRON TATEISI ELECTRONICS CO (JP)

International Classes:

G01V1/00; G01H1/00

Foreign References:

JP2017015604A	2017-01-19
JP2006105759A	2006-04-20
JPH03291536A	1991-12-20
JPH11248846A	1999-09-17
JP2003164056A	2003-06-06
JP2017015604A	2017-01-19

Other References: