1. An angle measurement system comprising:
a magnet coupled to a rotating member and providing a magnetic field which rotates with the rotating member about a rotational axis of the rotating member;
an integrated circuit angle sensor disposed within the magnetic field at a radially off-center position from the rotational axis and including:
first and second bridges of magneto resistive elements configured to respectively provide first and second signals representative of substantially orthogonal first and second directional components of the magnetic field and together representative of an angular position of the rotating member, wherein the first and second bridges are positioned adjacent to one another along a radius extending from the rotational axis and proximate to and in parallel with a surface of the magnet; and
a set of adjustment parameters for adjusting attributes of the first and second signals having values selected to minimize errors in the first and second signals.
2. The angle measurement system of claim 1, wherein the magnet comprises a ring magnet coupled about the rotating member at a position along shaft away from ends of the shaft.
3. The angle measurement system of claim 1, wherein the set of adjustment parameters have values selected to minimize errors in the first and second signals caused by non-uniformity of the magnetic field at the radially off-center position.
4. The angle measurement system of claim 1, wherein the set of adjustment parameters includes a first and a second amplitude parameter and a first and a second offset parameter for respectively adjusting an amplitude and an offset of the first and second signals.
5. The angle measurement system of claim 4, wherein the magnetoresistive elements comprise anisotropic magnetoresistive elements.
6. The angle measurement system of claim 4, wherein the set of adjustment parameters includes an offset parameter for one of the first and second signals to adjust a phase of the one of the first and second signals.
7. The angle measurement system of claim 6, wherein the magnetoresistive elements comprise giant magnetoresistive elements.
8. The angle measurement system of claim 1, wherein the integrated circuit is positioned at a radial distance from the axis of rotation which substantially minimizes variations in a magnitude of a position vector obtained from the first and second signals.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A flashlight, comprising:
a body having a first end and defining a longitudinal axis of the flashlight;
a light assembly coupled to the first end of the body, the light assembly including a light source;
a bezel coupled to the first end of the body around the light assembly, the bezel including an inner surface and a lens configured to focus light from the light source, the bezel configured to be moved relative to the body along the longitudinal axis to adjust the focus of the light, and the bezel further configured to be rotated in a first direction to lock a current focus position of the bezel;
a locking assembly disposed within the bezel and configured to switch between an unlocked position and a locked position if the bezel is rotated with respect to the body, the locking assembly including:
a ring-shaped outer component having a gap and an outer surface, the ring-shaped outer component configured to rotate with the bezel; and
an inner component coupled with the light assembly and configured to rotate with the body of the flashlight, the inner component including a nub configured to be disposed in the gap if the locking assembly is in the unlocked position, and to radially push the outer surface of the outer component against the inner surface of the bezel if the locking assembly is in the locked position.
2. The flashlight of claim 1, wherein the outer component further includes ridges on the outer surface of the outer component to hold the bezel in the current focus position if the locking assembly is in the locked position.
3. The flashlight of claim 2, wherein the bezel includes a slot on the inner surface of the bezel, and the outer component further includes:
a first curved wall having a guide member disposed in the slot to cause the outer component to rotate with the bezel; and
a second curved wall opposite the gap from the first curved wall, the ridges being disposed on the second curved wall;
wherein the nub is configured to radially push on the second curved wall if the locking assembly is in the locked position.
4. The flashlight of claim 3, wherein the first curved wall and second curved wall are connected by a lip.
5. The flashlight of claim 4, wherein the inner component further includes a tab disposed above the lip between the first curved wall and the second curved wall to stop the locking assembly from rotating past the locked position in the first direction.
6. The flashlight of claim 1, wherein the bezel is further configured to be rotated with respect to the body in a second direction, opposite the first direction, to unlock the current focus position.
7. The flashlight of claim 1, wherein the light assembly includes a pedestal coupled to the light source, and wherein the pedestal is coupled to the first end of the base by a threaded portion, and wherein the locking assembly is coupled to the pedestal around the light source.
8. The flashlight of claim 1, wherein the outer component has a length in the longitudinal direction and a diameter, wherein the length is about one-quarter or more of the diameter.
9. The flashlight of claim 8, wherein the length is about one-half the diameter of the outer component.
10. The flashlight of claim 8, wherein the gap of the outer component has a width, and wherein the length of the outer component is greater than the width of the gap.
11. A flashlight, comprising:
a body having a first end and defining a longitudinal axis of the flashlight;
a light assembly coupled to the first end of the body, the light assembly including a light source;
a bezel coupled to the first end of the body around the light assembly, the bezel including an inner surface and a lens configured to focus light from the light source, the bezel configured to be moved relative to the body along the longitudinal axis to adjust the focus of the light, and the bezel further configured to be rotated in a first direction to lock a current focus position of the bezel;
a locking assembly disposed within the bezel and configured to switch between an unlocked position and a locked position if the bezel is rotated with respect to the body, the locking assembly including:
a ring-shaped outer component having a first curved wall and a second curved wall separated by a gap, the second curved wall having an outer surface, and the ring-shaped outer component configured to rotate with the bezel; and
an inner component coupled with the light assembly and configured to rotate with the body of the flashlight, the inner component including a nub configured to be disposed in the gap if the locking assembly is in the unlocked position, and to radially push the outer surface of the second curved wall against the inner surface of the bezel if the locking assembly is in the locked position.
12. The flashlight of claim 11, wherein the outer component further includes ridges on the outer surface of the second curved wall to hold the bezel in the current focus position if the locking assembly is in the locked position.
13. The flashlight of claim 11, wherein the bezel includes a slot on the inner surface of the bezel, and the outer component further includes a guide member on the first curved wall and disposed in the slot of the bezel.
14. The flashlight of claim 11, wherein the first curved wall and second curved wall are connected by a lip, wherein the inner component further includes a tab disposed above the lip between the first curved wall and the second curved wall to stop the locking assembly from rotating past the locked position in the first direction.
15. The flashlight of claim 11, wherein the bezel is further configured to be rotated with respect to the body in a second direction, opposite the first direction, to unlock the current focus position.
16. The flashlight of claim 11, wherein the outer component has a length in the longitudinal direction and a diameter, wherein the length is about one-quarter or more of the diameter.
17. The flashlight of claim 16, wherein the gap of the outer component has a width, and wherein the length of the outer component is greater than the width of the gap.
18. A flashlight, comprising:
a body having a first end and defining a longitudinal axis of the flashlight;
a light assembly coupled to the first end of the body, the light assembly including a light source;
a bezel coupled to the first end of the body, the bezel including an inner surface and a lens configured to focus light from the light source, the bezel configured to be moved relative to the body along the longitudinal axis to adjust the focus of the light, and the bezel further configured to be rotated in a first direction to lock a current focus position of the bezel;
a locking assembly disposed within the bezel and configured to switch between an unlocked position and a locked position if the bezel is rotated with respect to the body, the locking assembly including:
a ring-shaped outer component having a first curved wall and a second curved wall separated by a gap, the second curved wall having an outer surface with a plurality of ridges, and the ring-shaped outer component configured to rotate with the bezel;
an inner component coupled with the light assembly and configured to rotate with the body of the flashlight, the inner component including a nub configured to be disposed in the gap if the locking assembly is in the unlocked position, and to radially push the outer surface of the second curved wall against the inner surface of the bezel if the locking assembly is in the locked position;
wherein the outer component has a length and a diameter, and wherein the length is at least one-quarter of the diameter.
19. The flashlight of claim 18, wherein the bezel includes a slot on the inner surface of the bezel, and the outer component further includes a guide member on the first curved wall and disposed in the slot of the bezel.
20. The flashlight of claim 18, wherein the first curved wall and second curved wall are connected by a lip, wherein the inner component further includes a tab disposed above the lip between the first curved wall and the second curved wall to stop the locking assembly from rotating past the locked position in the first direction.
21. A flashlight, comprising:
a body having a first end and defining a longitudinal axis of the flashlight;
a light assembly coupled to the first end of the body, the light assembly including a light source;
a bezel coupled to the first end of the body around the light assembly, the bezel including an inner surface and a lens configured to focus light from the light source, the bezel configured to be moved relative to the body along the longitudinal axis to adjust the focus of the light, and the bezel further configured to be rotated in a first direction to lock a current focus position of the bezel;
a locking assembly disposed within the bezel and configured to switch between an unlocked position and a locked position if the bezel is rotated with respect to the body, the locking assembly including:
a ring-shaped outer component having a gap and an outer surface adjacent the gap, the ring-shaped outer component configured to rotate with the bezel; and
an inner component coupled with the light assembly and configured to rotate with the body of the flashlight, the inner component including a nub to radially push the outer surface of the outer component against the inner surface of the bezel if the locking assembly is in the locked position.
22. The flashlight of claim 21, wherein the outer component further includes ridges on the outer surface of the outer component to hold the bezel in the current focus position if the locking assembly is in the locked position.
23. The flashlight of claim 22, wherein the bezel includes a slot on the inner surface of the bezel, and the outer component further includes:
a first curved wall having a guide member disposed in the slot to cause the outer component to rotate with the bezel; and
a second curved wall opposite the gap from the first curved wall, the ridges being disposed on the second curved wall;
wherein the nub is configured to radially push on the second curved wall if the locking assembly is in the locked position.
24. The flashlight of claim 23, wherein the first curved wall and second curved wall are connected by a lip.
25. The flashlight of claim 24, wherein the inner component further includes a tab disposed above the lip between the first curved wall and the second curved wall to stop the locking assembly from rotating past the locked position in the first direction.
26. The flashlight of claim 21, wherein the bezel is further configured to be rotated with respect to the body in a second direction, opposite the first direction, to unlock the current focus position.
27. The flashlight of claim 21, wherein the outer component has a length in the longitudinal direction and a diameter, wherein the length is about one-quarter or more of the diameter.
28. The flashlight of claim 27, wherein the length is about one-half the diameter of the outer component.
29. The flashlight of claim 27, wherein the gap of the outer component has a width, and wherein the length of the outer component is greater than the width of the gap.