Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1996-08-29
1998-06-02
Hofsass, Jeffery
Communications: electrical
Condition responsive indicating system
Specific condition
340540, 340686, 340689, G08B 2100
Patent
active
057606960
ABSTRACT:
An apparatus and method for discriminating between conventional earth tremors and those which are precursors to an earthquake are provided. The method involves detecting vibration signals indicative of an earthquake. The method provides a structural vibration detecting means for detecting vibration signals in a structure responsive to vibration of a substrate upon which the structure is mounted. The detecting means is mounted to a structure. The vibration signal of the structure, e.g. the vibrations received by the wall, is determined. Any extraneous vibration signal different from the vibration signal of the structure are compared. If the extraneous signal is within a predetermined alarm signal level, the apparatus is actuated to indicate that an earthquake is imminent. The apparatus involves the use of a detector, an amplifier for amplifying the received signal, and a comparator for determining whether a received amplified signal is an earthquake signal. A signal adjustment arrangement is provided in the apparatus so that extraneous signals outside a certain range can be effectively eliminated. An alarm is activated in the event that an earthquake signal within a predetermined level is detected. This apparatus and method are significantly improved over existing arrangements in that the arrangement compares signals and only after a received signal is within a predetermined value is the apparatus activated.
REFERENCES:
patent: 3506957 (1970-04-01), Davison
patent: 3691549 (1972-09-01), Wilson
patent: 3984803 (1976-10-01), Hawk et al.
patent: 4271407 (1981-06-01), Kehrman et al.
patent: 4300135 (1981-11-01), Korn et al.
patent: 4408196 (1983-10-01), Freeman
patent: 4473768 (1984-09-01), Kerr
patent: 4616320 (1986-10-01), Kerr et al.
patent: 4649524 (1987-03-01), Vance
patent: 4689997 (1987-09-01), Windisch
patent: 4764762 (1988-08-01), Almour
patent: 4849947 (1989-07-01), Baule et al.
patent: 5001466 (1991-03-01), Orlinsky et al.
patent: 5101195 (1992-03-01), Caillat et al.
patent: 5563575 (1996-10-01), Yamamura et al.
Guindi Sami
Heidt Robert
Sadri Afshin
Fincham Ian
Hofsass Jeffery
Tectonics Research Group Inc.
Wu Daniel J.
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