Seismometer

Details Seismometer Seismometer

1998-02-10

1999-12-07

Williams, Hezron

Measuring and testing

Vibration

Sensing apparatus

73 185, G01D 532, G01V 800

Patent

active

059964162

ABSTRACT:
A two- or three-component measuring accelerometer based on an operating principle entirely different from that of conventional accelerometers is realized with a simple arrangement and provided as a two- or three-component measuring seismometer. Planar optical fiber rolls (2) whose light propagation characteristics change sensitively in response to changes in the pressure applied thereto are split into more than three separate sections and disposed at the bottom of a columnar or polygonal prism-shaped load member (1). Changes in acceleration acting on the load member (1) are measured on the basis of differences between the light propagation characteristics of the split optical fiber rolls (2-1 to 2-4).

REFERENCES:
patent: 4613752 (1986-09-01), Davis
patent: 4893930 (1990-01-01), Garrett et al.
patent: 4951271 (1990-08-01), Garrett et al.
patent: 4959539 (1990-09-01), Hofler et al.

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