Patent ID: 11880031
Assignee: APPLE INC.
Field: Measurement (Instruments)
Classification: CPC G  B | IPC B  G

Claim 0:
1. Mechanical apparatus, comprising:
a rotational assembly, comprising:
a frame;
a gimbal, which is attached to the frame by first hinges disposed along a first axis and is configured to rotate on the first hinges about the first axis relative to the frame; and
a rotating element, which is attached to the gimbal by second hinges disposed along a second axis, perpendicular to the first axis, and is configured to rotate on the second hinges about the second axis relative to the gimbal;

one or more strain sensors disposed on at least one of the first hinges and configured to provide a signal indicative of a rotation of the rotating element about the second axis relative to the gimbal; and
control circuitry configured to monitor the rotation of the rotating element about the second axis responsively to the signal.