A linear actuator for a steer-by-wire system including a component, in particular an axle or a shaft, that can be moved along a linear trajectory, and including a measuring device for determining a position of the component. The measuring device has a coil for inductively determining the position of the component, and the coil is arranged coaxially relative to the linear trajectory of the component.

A device for inductive positioning comprises a coil, an element for influencing a magnetic field in the area of the coil, a signal generator for providing a digital signal and a delay element with an input and an output, wherein the delay element is designed on the basis of the coil and a delay period between a signal edge at the input and a corresponding signal edge at the output is dependent on the inductance of the coil. The device further comprises a comparator to provide a digital differential impulse, whose length is dependent on a time difference of corresponding signal edges at the input and the output of the delay element, an integrator to provide a voltage depending on the length of the differential impulse and an evaluator to determine the position of the coil in reference to the coil based the voltage.

An electrical assembly comprises a device. The device includes an inductive coil and an armature. The armature is arranged to be moveable between first and second positions when the inductive coil is energized. The electrical assembly further includes a detection unit which is configured to detect an inductance of the inductive coil or a characteristic that corresponds to the inductance of the inductive coil. The detection unit is further configured to determine the position of the armature based on the detected inductance or the detected characteristic.

A loading device, a monitoring system, and a method thereof can measure stiffness of a structural member (SM), such as a bone, and monitor progress or property over time. The loading device includes two types of displacement sensors, one type being an antenna. As the SM, which is in a magnetic or electromagnetic field and electromagnetically coupled to the antenna without contact, undergoes displacement under known loads, characteristics of the electromagnetic field coupling between the antenna and the SM change over time due to the displacement of the SM. The shift in the characteristics of the electromagnetic field coupling between the antenna and the SM can be used to determine the displacement of the SM. Based on the changes in the displacement over time, diagnosis of the SM being monitored over an evaluation period can be made.

A stator structure includes a stator core including a plurality of tooth sections, coils wound around the respective plurality of tooth sections via an insulator, and a first coil cover and a second coil cover that cover the coils from both sides in an axial direction of the stator core. The first coil cover and the second coil cover being coupled via the insulator.

An integrated circuit (IC) chip including an array of asymmetrically distributed magnetic field sensing elements. Additionally, an integrated circuit (IC) chip includes a substrate, a sensing coil supported by the substrate and enclosing a portion of substrate, and a Hall effect sensor supported by the portion of the substrate enclosed by the sensing coil.

The present invention relates to a system (100, 300, 400) for detecting abnormal movement of a gas turbine shaft. The system comprises: a magnetic circuit (104, 302, 402) comprising a first magnetic portion (110, 304) and a second portion (112, 404), and including at least one air gap between the first portion and the second portion; and a detection coil (106) wound around the first magnetic portion. The second portion is coupled to or moveable with the shaft to reduce the air gap, on axial movement of the shaft to change the reluctance of the magnetic circuit and thereby induce a voltage in the coil. The system may comprise a controller (108) for shutting off power to the gas turbine when the induced voltage exceeds a threshold voltage.

A battery-free rotation detecting device includes a rotatable carrier, a first magnetic element, a second magnetic element, a magnetic field shield and a detection coil set. The rotatable carrier has a rotation axis. The first magnetic element is located on the rotatable carrier and has a plurality of first magnetizing portions, and the magnetization directions of the first magnetizing portions are parallel to the rotation axis. The second magnetic element is spaced apart from the first magnetic element and has a plurality of second magnetizing portions. The magnetization directions of the second magnetizing portions are parallel to the rotation axis. The magnetic field shield located on the first magnetic element or the second magnetic element, is used to reduce the magnetic flux density between the first magnetic element and the second magnetic element. The detection coil set is located between the first magnetic element and the second magnetic element.

Embodiments of the present invention provide a crash detection circuit for detecting a crash of a vehicle and including a transformer including a first inductor as a part of a crash signal generation circuit, and a second inductor as a part of a crash signal evaluation circuit, and galvanically isolated from the first inductor, a first comparator including an output, an inverting input coupled to a first terminal of the second inductor, and a non-inverting input electrically coupled to a second terminal of the second inductor, and a window comparator including a first input terminal electrically connected to the output of the first comparator for an input voltage to be evaluated, and two second input terminals for receiving reference voltages.

An inductive sensor device includes a reference sensor head that is used to adjust the characteristics of an operational sensor head that is used to detect movement of a conductive target. The reference sensor head has near it a fixed reference target that is similar to the target for which the operational sensor head detects movement, with the difference that the reference target is fixed with respect to a reference sensor coil of the reference sensor head. The reference sensor head includes a variable reference capacitor or variable reference inductor that is adjusted to maintain constant (or nearly constant) output, such as a constant (or nearly constant) resonant frequency, during operation of the sensor device. Adjustments of the variable reference element (variable capacitor or variable inductor) may be undertaken to compensate for changes in characteristics of the reference sensor due to changes in temperature, for example.