Accelerometer sensor noise reduction method and means
First Claim
1. An accelerometer sensor system, comprising:
- (a) a housing structure;
(b) a first acceleration sensor disposed in said housing structure at a first selected location along the vertical axis of said housing structure, said first acceleration sensor providing a first output;
(c) a second acceleration sensor disposed in said housing structure at a second selected location along said vertical axis, said second acceleration sensor providing a second output; and
(d) means to combine said first and second outputs of said first and second acceleration sensors such as to simulate the output from a virtual acceleration sensor located at any selected location on said vertical axis.
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Abstract
In a preferred embodiment, an accelerometer sensor system, including: a housing structure; a first acceleration sensor disposed in the housing structure at a first selected location along the vertical axis of the housing structure, the first acceleration sensor providing a first output; a second acceleration sensor disposed in the housing structure at a second selected location along the vertical axis, the second acceleration sensor providing a second output; and apparatus to combine the first and second outputs of the first and second acceleration sensors such as to simulate the output from a virtual acceleration sensor located at any selected location on the vertical axis, allowing one to reduce noise induced by pitch motion, at any desired frequency or across a desired frequency band.
102 Citations
5 Claims
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1. An accelerometer sensor system, comprising:
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(a) a housing structure; (b) a first acceleration sensor disposed in said housing structure at a first selected location along the vertical axis of said housing structure, said first acceleration sensor providing a first output; (c) a second acceleration sensor disposed in said housing structure at a second selected location along said vertical axis, said second acceleration sensor providing a second output; and (d) means to combine said first and second outputs of said first and second acceleration sensors such as to simulate the output from a virtual acceleration sensor located at any selected location on said vertical axis. - View Dependent Claims (2, 3, 4)
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5. A method of nulling noise at any given frequency in an acceleration sensor system, comprising:
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(a) receiving a first output from a first sensor located at a selected position along a vertical axis of said sensor system; (b) receiving a second output from a second sensor located at a selected position along said vertical axis; and (c) combining said first and second outputs in a weighted manner so as to electrically tune the noise null to any desired frequency by simulating the output of a virtual sensor at a location on said vertical axis.
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Specification