Rotational oscillation sensor with a multiple dipole line trap system

Patent metadata

Field	Value
Publication number	US-11835333-B2
Application number	US-202117644817-A
Country	US
Kind code	B2
Filing date	Dec 17, 2021
Priority date	Dec 17, 2021
Publication date	Dec 5, 2023
Grant date	Dec 5, 2023

Abstract

Aspects of the present disclosure include a rotational oscillation sensor, a method of detecting rotational oscillation of an object, and a rotational oscillation sensor unit. One embodiment of the rotational oscillation sensor may comprise a first plurality of parallel dipole line (PDL) sensor unit units. In some embodiments, each of the plurality of PDL sensor units may comprise a plurality of cylindrical diametric magnets (CDMs) mounted in parallel around a first open region, and a diamagnetic object in the first open region.

First claim

What is claimed is:

1. A rotational oscillation sensor comprising:
a first plurality of parallel dipole line (PDL) sensor unit units, wherein each of the plurality of PDL sensor units comprises:
a plurality of cylindrical diametric magnets (CDMs) mounted in parallel around a first open region; and
a diamagnetic object in the first open region;

wherein the first plurality of PDL sensor units cooperate to detect rotation around a first axis.

2. The rotational oscillation sensor of claim 1 , wherein each of the first plurality of PDL sensor units comprises a light and a split photodetector that cooperate to determine a current position of the diamagnetic object.

3. The rotational oscillation sensor of claim 1 , wherein each of the first plurality of PDL sensor units further comprises a pair of electrodes that bias the diamagnetic object toward a center position when energized by a voltage.

4. The rotational oscillation sensor of claim 3 , further comprising a PID controller adapted to provide negative feedback to bias the first diamagnetic object toward the center position, wherein the PID controller is further adapted to produce an output proportional to a current position of the first diamagnetic object.

5. The rotational oscillation sensor of claim 1 , wherein the first plurality of parallel dipole line (PDL) sensor unit units comprise three PDL sensor units arranged in a triangle.

6. The rotational oscillation sensor of claim 1 , wherein the first plurality of parallel dipole line (PDL) sensor unit units comprise four PDL sensor units arranged in a square.

7. The rotational oscillation sensor of claim 1 , wherein the first plurality of PDL sensor units are arranged in a first layer; and further comprising a second plurality of PDL sensor units arranged in a second layer.

8. The rotational oscillation sensor of claim 7 , wherein the first plurality of PDL sensor units and the second plurality of PDL sensor units cooperate to detect rotation around three axis.

9. The rotational oscillation sensor of claim 7 , wherein the first plurality of parallel dipole line (PDL) sensor units comprise three PDL sensor units arranged in a first triangle, and the second plurality of PDL sensor units comprise three PDL sensor units arranged in a second triangle.

10. The rotational oscillation sensor of claim 7 , wherein the first plurality of parallel dipole line (PDL) sensor units comprise four PDL sensor units arranged in a first square, and the second plurality of PDL sensor units comprise four PDL sensor units arranged in a second square.

11. The rotational oscillation sensor of claim 1 , wherein the first plurality of parallel dipole line (PDL) sensor units comprise four PDL sensor units arranged in a tetrahedron.

12. The rotational oscillation sensor of claim 1 , wherein the first plurality of parallel dipole line (PDL) sensor unit units output a current velocity of the diamagnetic object relative to at least one of plurality of cylindrical diametric magnets.

13. The rotational oscillation sensor of claim 1 , wherein the rotational sensor is sensitive to very low frequency vibrations lower than about 1 Hz.

14. The rotational oscillation sensor of claim 1 , wherein the rotational oscillation sensor is sensitive to very low frequency vibrations lower than about 0.001 Hz.

15. A method of detecting rotational oscillation of an object, comprising:
deploying a first plurality of parallel dipole line (PDL) sensor unit units onto an object,
wherein each of the first plurality of PDL sensor units comprises:
a plurality of cylindrical diametric magnets mounted in parallel around a first open region; and
a diamagnetic cylinder in the first open region; and

detecting a current position of each diamagnetic object relative to at least one of the plurality of cylindrical diametric magnets; and
associating the detected current positions with a rotation of the object around a first axis.

16. The method of claim 15 , further comprising calculating a current velocity of each diamagnetic object relative to at least one of the plurality of cylindrical diametric magnets using the detected current positions.

17. The method of claim 15 , wherein the first plurality of PDL sensor units are arranged in a first layer; and further comprising attaching a second plurality of parallel dipole line (PDL) sensor unit units to the object.

18. The method of claim 17 , wherein the first plurality of PDL sensor units are attached in the first layer and wherein the second plurality of PDL sensor units are attached in a second layer.

19. A rotational oscillation sensor unit, comprising:
a metallic enclosure;
a sensor module attached to the metallic enclosure, the sensor module comprising at least three parallel dipole line (PDL) sensor unit units, wherein each of PDL sensor units comprises:
a plurality of cylindrical diametric magnets (CDMs) mounted in parallel around a first open region; and
a diamagnetic object in the first open region; and

an electronics module coupled to the sensor module, wherein the electronics module is adapted to detect a current position of each diamagnetic object relative to at least one of the CDMs and to calculate a rotation of an object from the detected current positions.

Assignees

• IBM

Inventors

• Gunawan Oki
• Elmegreen Bruce Gordon
• Glajchen Deon

Classifications

• G01B11/26 Primary

  for measuring angles or tapers; for testing the alignment of axes · CPC title

• G01P3/36

  Devices characterised by the use of optical means, e.g. using infrared, visible, or ultraviolet light (G01P3/68 takes precedence; gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams G01C19/64) · CPC title

• G01H11/02 Primary

  by magnetic means, e.g. reluctance · CPC title

• G01V1/01

  Measuring or predicting earthquakes · CPC title