A system and method for providing feedback for an aircraft-bladed rotor about a longitudinal axis and having an adjustable blade pitch angle. At least one position marker is provided at the rotor, extends along an axial direction, from a first end to a second end, and has varying magnetic permeability from the first end to the second end. At least one sensor is coupled to the rotor and configured for producing, as the rotor rotates about the longitudinal axis, at least one sensor signal in response to detecting passage of the at least one position marker. A control unit is communicatively coupled to the at least one sensor and configured to generate a feedback signal indicative of the blade pitch angle in response to the at least one sensor signal received from the at least one sensor.

A feedback device for use in a gas turbine engine, and methods and systems for controlling a pitch for an aircraft-bladed rotor, are provided. The feedback device is composed of a circular disk and a plurality of position markers. The circular disk is coupled to rotate with a rotor of the gas turbine engine, to move along a longitudinal axis of the rotor, and has first and second opposing faces defining a root surface that extends between and circumscribes the first and second faces. The plurality of position markers extend radially from the root surface and are circumferentially spaced around the circular disk. The position markers have a top surface elevated with respect to the root surface and opposing first and second side surfaces. The side surfaces of the position markers have a curved concave profile extending toward the root surface.

A feedback device for use in a gas turbine engine, and methods and systems for controlling a pitch for an aircraft-bladed rotor, are provided. The feedback device is composed of a circular disk and a plurality of position markers. The circular disk is coupled to rotate with a rotor of the gas turbine engine, to move along a longitudinal axis of the rotor, and has first and second opposing faces defining a root surface that extends between and circumscribes the first and second faces. The plurality of position markers extend radially from the root surface, are circumferentially spaced around the circular disk, and extending along the longitudinal axis from a first end portion to a second end portion. At least part of the first end portion and/or of the second end portion comprises a material having higher magnetic permeability than that of a remainder of the position markers.

There is provided a driving apparatus including: a rotation unit configured to be rotated about a center shaft by driving of a motor; a rotation angle acquisition unit configured to acquire information of a rotation angle of the rotation unit, as information proportional to the rotation angle; and a control unit configured to control the driving of the motor on the basis of the information of the rotation angle acquired by the rotation angle acquisition unit.

A magnetic field based micro-vibration measurement device and a measuring therefore are provided, which are applied in a micro-vibration measurement technical field. Fluxgate sensors and a control processing circuit are included. Each of the fluxgate sensors is disposed with an excitation coil and an induction coil that are mutually corresponding; the control processing circuit includes: an excitation signal generating module, a frequency-selective amplifying module, a phase-sensitive rectifying module, a smooth filtering module an ambient magnetic field acquisition module, and a vibration data statistics module. Excitation coils generate excitation magnetic field signals according to the excitation signal sent from the excitation signal generating module the induction coils are for generating induced current signals according to the receive excitation magnetic field signal and the ambient magnetic field signal. Induced current signals are calculated to obtain ambient magnetic field data after sequentially undergoing selective amplification, rectification and smooth filtering.

A system for tracking a tracking element inside a body is provided. It includes a first tracking system, which includes a first tracking sensor for detecting the current position of a tracking element inside a body relative to a nominal position with respect to the first tracking sensor, and a second tracking system, which includes a second tracking sensor for determining the position of the first tracking sensor of the first tracking system relative to the second tracking sensor, and a control unit. The first tracking sensor is movable, and the control unit is configured to deliver a correction signal indicating a deviation of the current position of the tracking element relative to a nominal position with reference to the first tracking sensor. Further, a respective tracking method is provided.

The present invention provides a shifting range rotary sensing device for a vehicle, comprising: a housing; a substrate accommodated and disposed in the housing; a rotary hinge rod rotatably disposed within the housing and contactingly connected to a lever cooperating unit operated in cooperation with a vehicle gearshift lever so that the rotary hinge rod is rotated cooperatively with the vehicle gearshift lever when the vehicle gearshift lever is rotated; a sensing unit comprising a magnetic sensor disposed on the substrate and a magnet disposed at the rotary hinge rod to correspond to the magnetic sensor; and a rotary hinge rod torsion unit disposed within the housing in a manner to be supportingly contacted at one end thereof with the rotary hinge rod and at the other end thereof with the inside of the housing to elastically support the rotary hinge rod when the rotary hinge rod is rotated.

There is provided a driving apparatus including: a rotation unit configured to be rotated about a center shaft by driving of a motor; a rotation angle acquisition unit configured to acquire information of a rotation angle of the rotation unit, as information proportional to the rotation angle; and a control unit configured to control the driving of the motor on the basis of the information of the rotation angle acquired by the rotation angle acquisition unit.

A motor includes a stator, and includes a first substrate and a second substrate mounted on the stator. The stator has a stator core in a ring shape and a first coil of a first phase and a second coil of a second phase wound around the stator core. The first substrate includes a first power supply wiring to supply electric power to the first coil. The second substrate has a second power supply wiring to supply electric power to the second coil.

A sensor tag includes a plurality of conductors to be arranged close to each other and to constitute a resonance element, and a sensing unit to be interposed between the plurality of conductors and to have a physical property that changes due to a change in a physical quantity of an object to be sensed by the sensing unit.