Abstract: An ocean current detection device and method based on double-helix and double-core vibration fiber-optic cable, comprises a double-core fiber-optic cable and a ?-OTDR system; the double-core fiber-optic cable comprises a first and a second optical fiber core, provided symmetrically in the double helix structure. The terminate ends of the first and the second optical fiber core are connected, and the start end of the first or the second optical fiber core is connected with the ?-OTDR system. When measuring the ocean current characteristics in the target sea area, the double-core fiber-optic cable is provided underwater to generate vortex-induced vibration. The ?-OTDR system is provided for emitting laser towards the cable, receiving returned double-core vibration signals, extracting vibration characteristics from the double-core vibration signals to determine ocean current characteristics, including ocean current flow velocity and direction, to improve the detection accuracy.

Abstract: The present invention discloses a displacement device based on Hall-effect sensors and planar motors.

Abstract: The present invention discloses a displacement device based on Hall-effect sensors and planar motors.

Abstract: A displacement device (1), including: a stator magnet array (10) including a plurality of first magnets (11) and a plurality of second magnets (12), the first magnets (11) and the second magnets (12) being arranged periodically in a first plane (X-Y plane); and a rotor (20) including at least a first X-coil array (A11) of a plurality of first X-coils (L11) and a first Y-coil array (A12) of a plurality of first Y-coils (L12). A body portion of the first X-coil array (A11) is disposed in a first conductor layer that is substantially parallel to the first plane (X-Y plane), and a body portion of the first Y-coil array (A12) is disposed in a second conductor layer that is substantially parallel to the first plane (X-Y plane), the first conductor layer and the second conductor layer are disposed at a distance from each other in a direction perpendicular to the first plane (X-Y plane).

Abstract: A displacement device including a stage and a stator, wherein the stator is shaped to provide a working region and the stator includes: a plurality of magnet blocks of the first kind, each magnet block of the first kind including a plurality of first magnets generally linearly elongated in the X-direction, and a plurality of magnet blocks of the second kind, each magnet block of the second kind including a plurality of second magnets generally linearly elongated in the Y-direction. The stage is movably arranged next to the stator in the Z-direction, and the stage includes: a coil block of the first kind, each coil block of the first kind including a plurality of electric conductors generally linearly elongated in the X-direction; and a coil block of the second kind, each coil block of the second kind including a plurality of electric conductors generally linearly elongated in the Y-direction.

Abstract: A displacement device including a stage and a stator, wherein the stator is shaped to provide a working region and the stator includes: a plurality of magnet blocks of the first kind, each magnet block of the first kind including a plurality of first magnets generally linearly elongated in the X-direction, and a plurality of magnet blocks of the second kind, each magnet block of the second kind including a plurality of second magnets generally linearly elongated in the Y-direction. The stage is movably arranged next to the stator in the Z-direction, and the stage includes: a coil block of the first kind, each coil block of the first kind including a plurality of electric conductors generally linearly elongated in the X-direction; and a coil block of the second kind, each coil block of the second kind including a plurality of electric conductors generally linearly elongated in the Y-direction.

Abstract: A shock absorber is provided that also includes vibration damping. The shock absorber includes at least one shock absorbing frame member that partially surrounds an electronic device enclosure. The shock absorber also includes at least two protrusions that protrude from the at least one shock absorbing frame member. Each protrusion extends beyond the at least one shock absorbing frame member from a recessed surface recessed into the at least one shock absorbing frame member.

Abstract: A shock absorber is provided that also includes vibration damping. The shock absorber includes at least one shock absorbing frame member that partially surrounds an electronic device enclosure. The shock absorber also includes at least two protrusions that protrude from the at least one shock absorbing frame member. Each protrusion extends beyond the at least one shock absorbing frame member from a recessed surface recessed into the at least one shock absorbing frame member.