Gravity gradiometer

Measuring and testing – Gravitational determination

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

G01V 702

Patent

active

059229519

ABSTRACT:
This invention concerns improvements in the performance of a mobile gravity gradient instrument (GGI). Gravity gradiometers measure one or more components of the gradient of gravity which is expressed as the gradient of a gravity vector, or in other words a tensor. The instrument comprises a first, second, third and fourth accelerometer equally spaced around the circumference of a circle, with their sensitive axes tangential to the circle, and arranged in opposing pairs with the first accelerometer opposite the second, and the third accelerometer opposite the fourth. In use the accelerometers are spun around an axis normal to the circle which passes through its center. A summing amplifier receives the outputs of the accelerometers and combines them in a manner to cancel the common mode output signals and so produces all instrument output. One or more feedback loops extend from the instrument output to one or more of the accelerometers to compensate for errors. In general, the invention embraces the concept of balancing any feedback signal so that it is applied, after appropriate division (if required), to two or more of the accelerometers in appropriately inverted senses, rather than being applied to a single accelerometer.

REFERENCES:
patent: 4188816 (1980-02-01), Mairson
patent: 4245510 (1981-01-01), Baker
patent: 4515013 (1985-05-01), Hue
patent: 4601206 (1986-07-01), Watson
patent: 5357802 (1994-10-01), Hofmeyer et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Gravity gradiometer does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Gravity gradiometer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gravity gradiometer will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2277215

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.