Accelerometer with bias reduction feature
AssigneeHoneywell International Inc.
InventorsChristina A. Polwarth, Paul W. Dwyer, Stephen F. Becka
Life of this patent
Estimating the term…
Abstract
An accelerometer system including: a housing comprising a first portion and a second portion, the housing has a first coefficient of thermal expansion (CTE) value; and a proof mass element disposed between the first portion and the second portion of the housing, wherein a first surface of the proof mass element contacts the first portion and a second surface of the proof mass element contacts the second portion, the proof mass element having a second CTE value, the second CTE value being within 30% of the first CTE value.
Claims20
An accelerometer system comprising:
- a housing comprising a first portion and a second portion, the housing having a first coefficient of thermal expansion (CTE) value;
- and
- a proof mass element disposed between the first portion and the second portion of the housing, wherein a first surface of the proof mass element contacts the first portion and a second surface of the proof mass element contacts the second portion, the proof mass element having a second CTE value, the second CTE value being within 30% of the first CTE value.
A method for assembling an accelerometer system, the method comprising:
- determining a first coefficient of thermal expansion (CTE) value of a housing, the housing comprising a first portion and a second portion;
- selecting, based on the first CTE value, a proof mass element with a second CTE value, the second CTE value being within 30% of the first CTE value;
- and
- disposing the proof mass element between the first portion and the second portion.
A proof mass for a flexure accelerometer, the proof mass comprising:
- an elongated body extending along a longitudinal axis and defining a first surface and a second surface, the second surface being opposite the first surface,
- wherein the first surface of the elongated body is configured to contact a first portion of a housing of the flexure accelerometer, wherein the second surface of the elongated body is configured to contact a second portion of the housing, wherein the housing has a first coefficient of thermal expansion (CTE) value,
- wherein the elongated body has a second CTE value, the second CTE value being within 30% of the first CTE value.
Dependencies are inferred from the claim text.