Patent · US Active

Gravity gradiometer

US7571547B2 · kind B2 · utility

7Cited by

44References

12Claims

0Family size

Assignee

TECHNOLOGICAL RESOURCES PTY LIMITED · AU

Inventors

Frank Joachim Van Kann · Perth, AU
John Winterflood · Perth, AU

Key dates

Filing date	Aug 27, 2007
Grant date	Aug 11, 2009
Priority date	—
Expiry date	Aug 27, 2027

Classification

Technology area (CPC G)Physics
CPC primaryG01V7/04
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A gravity gradiometer is disclosed which has sensor masses in the forms of bars 41 and 43 arranged orthogonal to one another and transducers for providing an output signal indicative of movement of the bars in response to changes in the gravity gradient tensor. The transducers are formed from thin film structure having a first layer forming a fine pitch coil 510 and a second layer forming a coarse pitch coil 511. The layers are separated by an insulating layer. The coarse pitch coil 511 forms a transformer for stepping up the current flowing through the fine pitch coil 510 and the coarse pitch coil 511 supplies current to a SQUID device 367.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.