Electromagnetic accelerometer
First Claim
Patent Images
1. An electromagnetic accelerometer, comprising:
- a peripheral frame;
a mass suspended from the peripheral frame;
a plurality of strain gauges configured to detect displacement of the mass; and
a magnetic motor includinga first pole piece defining a chamber,a second pole piece positioned in the chamber and coupled to the mass, the second pole piece being located in a magnetic field exerting a magnetic force on the second pole,a permanent magnet coupled to the first pole piece and generating the magnetic field, anda coil coupled to the first pole piece, the permanent magnet and the coil surrounding at least a portion of the second pole piece.
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Abstract
An electromagnetic accelerometer includes a peripheral frame, a mass suspended from the peripheral frame, a plurality of strain gauges configured to detect displacement of the mass, and a magnetic motor. The magnetic motor includes a first pole piece defining a chamber, a second pole piece positioned in the chamber and coupled to the mass, a permanent magnet coupled to the first pole piece, and a coil coupled to the first pole piece. The permanent magnet and the coil surround at least a portion of the second pole piece.
10 Citations
10 Claims
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1. An electromagnetic accelerometer, comprising:
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a peripheral frame; a mass suspended from the peripheral frame; a plurality of strain gauges configured to detect displacement of the mass; and a magnetic motor including a first pole piece defining a chamber, a second pole piece positioned in the chamber and coupled to the mass, the second pole piece being located in a magnetic field exerting a magnetic force on the second pole, a permanent magnet coupled to the first pole piece and generating the magnetic field, and a coil coupled to the first pole piece, the permanent magnet and the coil surrounding at least a portion of the second pole piece. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification