Title:
EARTHQUAKE SENSOR
Document Type and Number:
WIPO Patent Application WO/1991/011737
Kind Code:
A1
Abstract:
An earthquake sensor comprises a seismoscope (1) equipped with a mercury droplet (2) placed in a recess (4) formed at the center of a vibration surface (3) and with an electrode (6) disposed around mercury (2) and coming into contact with it only at the time of vibration, and signal processing means (11) for processing signal pulses from this seismoscope and identifying an earthquake. Characterizing signal pulses are generated in a shock wave band by optimizing the shape of the recess (4), the amount of mercury (2) and the distance between the mercury (2) and the electrode (6) and vibration other than that of the earthquake will not be detected.
Inventors:
IWABUCHI HIROO (JP)
KOGA RYOICHI (JP)
UNO TAKASHI (JP)
OOHASHI TOKUYOSHI (JP)
KOGA RYOICHI (JP)
UNO TAKASHI (JP)
OOHASHI TOKUYOSHI (JP)
Application Number:
PCT/JP1990/001702
Publication Date:
August 08, 1991
Filing Date:
December 26, 1990
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD (JP)
International Classes:
H01H35/14; G01V1/00; G01V1/18; (IPC1-7): G01H1/00; G01V1/16; G01V1/28; H01H35/14
Foreign References:
| JPS58174882A | 1983-10-13 | |||
| JPH06341406B | ||||
| JPS55116224A | 1980-09-06 | |||
| JPS5888686A | 1983-05-26 | |||
| JP6139950Y | ||||
| JPS55101021A | 1980-08-01 | |||
| JPS54139774A | 1979-10-30 |
Other References:
See also references of EP 0464212A4
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