High precision flow cell accelerometer for measuring quasi-steady microgravity accelerations

Naumann, Robert J.; Haulenbeek, Glen
January 2000
AIP Conference Proceedings;2000, Vol. 504 Issue 1, p599
Academic Journal
A new concept in measurement technique for low-level microgravity accelerations using an instrumented differentially heated flow cell is presented. By using well-matched thermistors and precision resistors, there is virtually no instrument bias and sensitivities better than 0.1 micro-g can easily be achieved. The thermal field is sensitive only to non-zero time average accelerations, so the g-jitter effects are essentially eliminated. This feature allows a very low sample rate to be used so that the data rate requirements are very modest and a real time display is possible without additional processing. The acceleration history of an entire mission can easily be displayed on a few pages. © 2000 American Institute of Physics.


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