Data processing: measuring – calibrating – or testing – Calibration or correction system – Sensor or transducer
Reexamination Certificate
2007-06-25
2008-12-30
Le, John H (Department: 2863)
Data processing: measuring, calibrating, or testing
Calibration or correction system
Sensor or transducer
C368S159000, C701S213000, C702S065000, C702S092000
Reexamination Certificate
active
07472032
ABSTRACT:
A sensor array made up of 2n piezoelectric oscillators (preferably paired quartz oscillators) is provided in which n equals the number of axes of interest and each one of the pairs of oscillators has a principle axis directed oppositely from the other of its pair. A controller which preferably includes a microprocessor, makes use of the dynamic relationships of the sensors in the array to adaptively assess the magnitude of weighting factors needed to correct the output signal from each oscillator for environmental and systematic effects to provide optimum frequency and phase output for computing position, velocity, and acceleration. Preferably, a seventh reference oscillator is provided in the center of the array which is canted relative to each of the three orthogonal axes by 45°. This adaptive sensor array is capable of determining position within one meter along any of the x, y, and z axes without the need for any external (e.g., GPS) signal. In addition, unlike other sensor systems, it is capable of providing local vertical on a continuous basis. The array can also determine if an object is moving in any translational or rotational direction, within the measurement capabilities of the system.
REFERENCES:
patent: 5444641 (1995-08-01), White
patent: 7046584 (2006-05-01), Sorrells et al.
patent: 2008/0088507 (2008-04-01), Smith et al.
patent: 2008/0091350 (2008-04-01), Smith et al.
Allan David W
German Gus R
Kusters John A
Allan Space-Time Solutions, LLC
Le John H
Thomson Richard K
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