An inductive position measuring device includes a scanning element and a scale element. The position measuring device is able to determine positions of the scanning element relative to the scale element in a first direction and in a second direction. The scale element includes graduation structures arranged next to one another along the first direction, and the graduation structures have a periodic characteristic with a second period length along the second direction. The scanning element has a first receiver track, a second receiver track, a third receiver track, and an excitation lead. Each of the three receiver tracks has two receiver circuit traces. The receiver circuit traces have a periodic characteristic with a first period length along the first direction, and the receiver tracks are arranged at an offset from one another in the second direction.

An offset correction device includes: an amplitude adjuster that adjusts an amplitude of a detection signal output from an encoder by adjusting a gain of the detection signal so that the amplitude is within a predetermined range; an offset corrector that corrects an offset of an amplitude center of the detection signal; and a storage that stores a relationship between the gain and an offset amount in advance, wherein the offset corrector refers to the relationship stored in the storage when the amplitude adjuster changes the gain, obtains the offset amount corresponding to the changed gain, and corrects the offset based on the obtained offset amount.

An inductive position sensor, having a first stator element that comprises a first excitation coil, to which a periodic alternating voltage is applied, and also comprises a first receiving system, wherein the signal from the first excitation coil couples inductively into the first receiving system. A first rotor element influence the strength of the inductive coupling between the first excitation coil and the first receiving system as a function of its angular position relative to the first stator element. A metal element and the first rotor element are arranged on a shaft in a rotationally fixed manner. An evaluation circuit determines the angular position of the first rotor element relative to the first stator element from the voltage signals induced in the first receiving system. The first rotor element and the metal element are each designed as a conductor loop with a periodic geometry.

In at least one aspect, an inductive position sensor comprising a target. The inductive position sensor can include a stator including an excitation coil being inductively coupled to the target, and a receiver coil including a first loop connected in series with a second loop, and inductively coupled with the target such that a receiver coil voltage is generated at the receiver coil. The second loop can be offset, on the stator and relative to the first loop, by a portion of a harmonic period corresponding with a harmonic for nullification in the receiver coil voltage. The inductive position sensor can include a control unit configured to receive a plurality of receiver coil voltages including the receiver coil voltage, the control unit configured to generate an angular position signal based on the plurality of receiver coil voltages.

A measurement device for measuring an angular position of a movable body that is rotatable about an axis of rotation relative to a stationary body, the device comprising, facing each other, a movable portion with a first printed circuit having first tracks formed thereon defining a plurality of target patterns and a stationary portion with a second printed circuit having second tracks formed thereon defining a plurality of measurement patterns that are angularly distributed in regular manner. The target patterns are angularly distributed in irregular manner, the number of target patterns is not less than two, and the product of the number of target patterns multiplied by the number of measurement patterns is not less than twelve.

An inductive angle sensor includes an inductive target arrangement with k-fold symmetry and a first pickup coil arrangement with k-fold symmetry and a second pickup coil arrangement with k-fold symmetry. A combination apparatus is designed to combine signals of the first pickup coil arrangement with signals of the second pickup coil arrangement and, on the basis thereof, to ascertain an angle-error-compensated rotation angle. The single pickup coils of the first and second pickup coil arrangements are each rotationally offset about the axis of rotation R by a geometric offset angle α relative to one another. Additionally, the entire first pickup coil arrangement is rotationally offset relative to the entire second pickup coil arrangement about the axis of rotation R by a geometric offset angle ρ.

In at least one general aspect, an inductive sensor can include a shaft having an axis of rotation, and a rotor physically coupled to the shaft and including a rotor coil. The rotor and the rotor coil can be aligned along a plane orthogonal to the axis of rotation. The inductive sensor can include a stator including a stator layer, an excitation coil, and an eccentricity receiver coil where the excitation coil and the eccentricity receiver coil are physically coupled to the stator layer.

A sensor system and method of operating the sensor system can include an indicator that is operable in resonance, the indicator being connected to a movable element of an actuator, and a sensor including sensor windings arranged in direct proximity to the indicator and external to a closed housing. The sensor can receive a position or an angle of the indicator, and can measure the position or the angle of the movable element inside the actuator through the closed housing based on inductive resonance facilitated by the indicator.

An electronic device including a continuity sensor and electrical circuitry configured to detect and report the continuity state of an article, container or product packaging is disclosed. The continuity sensor includes a first substrate with first and second coils thereon, and a second substrate with a third coil thereon. The first coil has an integrated circuit electrically connected thereto. The first substrate is part of, or is attached or secured to a part of the article, container or packaging. The second substrate is another part of, or is attached or secured to another part of the article, container or packaging. One of the article, container or packaging parts is (re)movable with respect to the other part. The first and second coils have one coupling when the article, container or packaging is closed or sealed, and a different coupling when the article, container or packaging is open or unsealed.

An electromagnetic inductive encoder that can suppress the effect of changes in magnetic flux received by the receiver section and maintain the accuracy of measurement results is provided. The electromagnetic inductive encoder 1 includes a scale 2 and a head 3 that is provided to face the scale 2 and moves relative to the scale 2. The head 3 includes a transmitter section 4 and a receiver section 5 with a plurality of receiving coils 500. The receiver section 5 has a first receiver section 51 with at least one receiving coil 500, a second receiver section 52 that is provided apart from the first receiver section 51 and has at least one receiving coil 500 different from the first receiver section 51, and connection wiring 53 that connects the first receiver section 51 and second receiver section 52. The first receiver section 51 and the second receiver section 52 are arranged linearly symmetrically with the axis L1 of the Y-direction, which is orthogonal to the X-direction (measurement direction) in the plane 30 where the receiving coils 500 are arranged, and are arranged in the same number.