An inductive angle sensor for determining a rotational position of a rotor relative to a stator includes an exciter coil, at least one pickup coil arrangement having an m-fold symmetry and at least one conductive target having an m-fold symmetry. The exciter coil may excite the conductive target which, in turn, may induce an induced signal in the pickup coil arrangement. A signal analysis device may determine the rotational position of the rotor based on the induced signal. The inductive angle sensor may comprise a second pickup coil arrangement having an n-fold symmetry and a second conductive target having an n-fold symmetry. The exciter coil may excite the second conductive target which, in turn, may induce a second induced signal in the second pickup coil arrangement. The signal analysis device may determine the rotational position of the rotor based on the two induced signals according to a Vernier principle.

A method for pressurizing and depressurizing a shock absorber of an aircraft. More specifically, it relates to a method in which an aircraft weight and ambient temperature are used to calculate a required pressurization level of a shock absorber. As such, the shock absorber may be pressurized to the correct level without applying an iterative approach, greatly reducing initialization time.

A system for detecting rotational over travel includes: an angular position sensor comprising a rotor rotatable about an axis, the angular position sensor configured to output one or more electrical signals to indicate an angular position of the rotor about the axis and/or a number of turns completed by the rotor about the axis; and a device comprising a first operating mode and a second operating mode and configured to transition from the first operating mode to the second operating mode in response to the rotor rotating beyond at least one angular position threshold, wherein the transition from the first operating mode to the second operating mode is independent of the one or more electrical signals.

A caliper-arm-position sensor comprising a differential variable reluctance transducer (DVRT) and circuits to drive the DVRT with a substantially sinusoidal signal and to sample a signal at the DVRT once per drive-signal cycle at a predetermined position in the drive-signal cycle is disclosed.

Apparatuses, systems, and associated methods of assembly are described that provide for improved probed assemblies for use in sensors configured to convert between motion and electrical signals. An example probe assembly includes a probe rod defining a first end. In an operational configuration, the probe rod is at least partially received by a sensor device. The probe assembly further includes a probe head that receives the first end of the probe rod. The probe head mates with the first end so as to secure the probe rod therein. The first end of the probe rod is further welded to the probe head via a butt welding technique.

Provided are embodiments for a method for variable differential transformer demodulation using a hybrid algorithm. The method can obtain a first feedback signal over a first half of a first cycle and a second feedback signal over a first half of a second cycle, and obtain a first calibration signal and a second calibration signal during a second half cycle of the first cycle. The method can also obtain an excitation signal over a second half of the second cycle, and determine a sensor position of the variable differential transformer based on the first feedback signal, the second feedback signal, and the excitation signal. Also provided are embodiments for a system for variable differential transformer demodulation using a hybrid algorithm.

Aspects of the disclosure provide a sensing apparatus including a sensing device, a memory, and processing circuitry. The sensing device includes resonators having respective resonant frequencies. The resonators include an array of inductive coils positioned on a surface of the apparatus. The sensing device can output a signal indicating changes of the resonant frequencies caused by presence of an object proximate to the surface. The memory stores reference signals corresponding to reference objects. Each reference signal indicates changes of the resonant frequencies caused by the respective reference object proximate to the surface. The processing circuitry can receive, from the sensing device, a particular signal indicating changes of the resonant frequencies caused by presence of a particular object proximate to the surface. The processing circuitry compares the particular signal with the stored reference signals of the reference objects to determine an identity of the particular object.

A linear variable differential transformer includes: a moving portion having a shape extending in a direction of an axial line; a bobbin including a through hole formed such that the moving portion is movable in the direction of the axial line, an outer circumferential surface of the bobbin having a shape inclined symmetrically with respect to a center line thereof based on the direction of the axial line; a primary coil wound around the outer circumferential surface of the bobbin; and a secondary coil wound around the wound primary coil, a wound outer surface of the secondary coil having a shape parallel to the axial line.

A method for pressurizing and depressurizing a shock absorber of an aircraft. More specifically, it relates to a method in which an aircraft weight and ambient temperature are used to calculate a required pressurization level of a shock absorber. As such, the shock absorber may be pressurized to the correct level without applying an iterative approach, greatly reducing initialization time.

A magnetic core structure for a Linear Variable Differential Transducer (LVDT) comprising an elongate core of magnetic material mounted within a protective tube and means for positioning the core within the protective tube, the means for positioning comprising a ball provided within the protective tube at one end of the core, the ball being formed of an elastic material having a coefficient of thermal expansion selected to compensate the difference in elongation between magnetic core structure components caused by thermal expansion.