Title:
MASS WAVE RECEIVER
Document Type and Number:
Japanese Patent JPS5719687
Kind Code:
A
Abstract:
PURPOSE: To forecast effectively the occurrence of earthquakes by means of using a noninduction coil or a semiconductor element to transfer the mass wave into electric current.
CONSTITUTION: A cross-type nonconduction coil B receives the mass wave, and an alternating current picked-up therefrom is applied to an LPF22 having a choke coil 20 and a capacitor 21 so as to remove the high-frequency wave. The alternating current is rectified by a bridge rectifier circuit 23, and the rectified current is supplied as a pulse current to a high speed recorder E to be recorded therein. A semiconductor element C may be used in place of the coil B' to obtain the similar resultant records.
Inventors:
OOHASHI MASAO
Application Number:
JP9434180A
Publication Date:
February 01, 1982
Filing Date:
July 09, 1980
Export Citation:
Assignee:
OHASHI MASAO
International Classes:
G01V7/00; G01V1/00; (IPC1-7): G01V1/00; G01V7/00
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