Method and apparatus for detecting impending earthquakes

G - Physics – 01 – V

Patent

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G01V 1/00 (2006.01)

Patent

CA 2300377

An apparatus and associated method for detecting impending earthquakes includes at least one sensor, and preferably multiple sensors, for mounting on a building or other like structure, and include a transducer for converting vibration signals to electronic impulses. The signals are transmitted to a solid state detection circuit, which distinguishes between extraneous signals and signals indicative of the P-waves which signal an impending earthquake. Discrimination between relevant and non-relevant may be achieved by selecting a minimum amplitude and duration of signals within a selected frequency range, and triggering an alarm when the selected minimums are exceeded. Where multiple sensors are deployed, temporal overlap between selected signals can be assessed for further discrimination.

L'invention concerne un appareil et un procédé associé de détection de tremblements de terre imminents. L'appareil comprend au moins un capteur, de préférence plusieurs destinés à être montés sur un bâtiments ou autre structure analogue et comprenant un transducteur servant à convertir des signaux de vibrations en impulsions électroniques. Les signaux sont émis en direction d'un circuit de détection à semi-conducteurs, lequel fait la distinction entre des signaux parasites et des signaux indicateurs d'ondes P, annonciatrices d'un tremblement de terre imminent. La distinction entre les signaux pertinents et ceux non pertinents peut s'effectuer par sélection d'une amplitude et d'une durée minimales de signaux se situant dans une gamme de fréquences choisies, et par déclenchement d'une alarme lorsque ces minimales choisies sont dépassées. Si l'on a réparti plusieurs capteurs, on peut également mesurer le chevauchement temporel entre des signaux choisis afin de pouvoir établir une autre distinction.

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