Patent ID: 11933812
Assignee: AGENCY FOR DEFENSE DEVELOPMENT
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 15:
16. An accelerometer comprising:
a frame portion having a hole extending through the frame portion; and
a central portion suspended in the hole;
wherein the central portion is suspended entirely by a connecting portion consisting of:
a single first elastic beam, wherein a midpoint of the first elastic beam is coupled to an upper surface of the central portion and lateral edges of the first elastic beam are coupled to the frame portion; and
a single second elastic beam, wherein a midpoint of the second elastic beam is coupled to a lower surface of the central portion and lateral edges of the second elastic beam are coupled to the frame portion;
wherein the first elastic beam has a transverse orientation with respect to the second elastic beam; and

a sensing portion configured to convert a sensed displacement of the central portion into an electrical signal;
wherein the accelerometer is configured to sense an acceleration with respect to a Z-axis penetrating the upper surface and the lower surface of the central portion and configured to suppress sensing of an acceleration with respect to an X-axis and a Y-axis crossing the Z-axis,
wherein the first elastic beam has a same thickness as a thickness of the central portion in a Y-axis direction, and
wherein the second elastic beam has a same thickness as a thickness of the central portion in an X-axis direction.