An angle transmitter unit for an inductive sensor for sensing detecting the position of a rotating element, the angle transmitter unit being connectible to a rotating element, having at least one first resonant circuit, interacting with at least one receiver coil of the sensor in order to provide the angle of the rotating element. The angle transmitter unit includes, in addition to the first resonant circuit, at least one additional, clearly-identifiable reference resonant circuit in order to form a reference position on the angle transmitter unit.

Position sensing apparatus is provided. In one example implementation, the position sensing apparatus comprises a first member having an excitation conductive winding and a detection conductive winding formed thereon, and a second member having a resonant circuit formed thereon. An integrated circuit comprising excitation signal generation and detection signal processing circuitry is arranged to generate an alternating excitation signal at a resonant frequency of the resonant circuit and to process an alternating detection signal induced in the detection conductive winding as a result of a magnetic field generated by the alternating excitation signal flowing through the detection conductive winding, and the excitation conductive winding and the detection conductive winding are arranged so that the detection signal varies in dependence on the relative position of the first and second member. Phase-shift circuitry is arranged to introduce a phase shift to one of the excitation signal and the detection signal such that the excitation signal output by the integrated circuit and the detection signal input to the detection circuit are in phase or in anti-phase with each other.

The invention relates to a novel type of electric inductance arrangement for a series of applications in the field of distance measurement, sensor-based detection of objects, and construction of induction machines. The novelty consists in the type of inductance arrangement of the receiver or transmitter coil, said arrangement being designed in the form of a ladder rung arrangement, wherein the ladder spars short-circuit the rungs. The sum of all the short-circuit currents is an indicator of what is occurring in the surroundings of the arrangement. This could be changing magnetic fields caused by transmitter objects or additional ladder-rung systems acting as transmitters. Multiple such sensors and transmitters can be designed in the ladder-rung form, said sensors and transmitters being connected in parallel or in series according to the application under certain circumstances and if necessary assuming the excitation function by moving a conductor through which a direct current is flowing or by applying alternating currents. The aforementioned inductance arrangement results positively in that the coils can all have a completely crossover-free design and are therefore substantially simpler to technically implement for very different applications in electrical engineering. The applicability ranges from short-range distance measuring devices and long-range object location to light detection and efficient induction machines with large or also very small constructions.

A scale capable of maintaining measurement accuracy even if the pattern of the scale pattern is scratched is provided. The scale 2 comprises a scale pattern 4 having a plurality of unit patterns provided at a predetermined pitch along the measurement direction on a surface thereof. At least one of the plurality of unit patterns comprises a plurality of loop portions 8 formed with conductors in a loop shape. The plurality of loop portions 8 included in the unit pattern are arranged so as to be spaced from each other such that the centers of gravity of the loop portions 8 are at the same position in the measurement direction on the surface of the scale 2. Thereby, the plurality of loop portions 8 included in the unit pattern can prevent deviation of the center of gravity of the magnetic flux distribution in the measurement direction, even if any of the plurality of the loop portions 8 is scratched. Therefore, the scale 2 can maintain the measurement accuracy.

The invention relates to a novel type of electric inductance arrangement for a series of applications in the field of distance measurement, sensor-based detection of objects, and construction of induction machines. The novelty consists in the type of inductance arrangement of the receiver or transmitter coil, said arrangement being designed in the form of a ladder rung arrangement, wherein the ladder spars short-circuit the rungs. The sum of all the short-circuit currents is an indicator of what is occurring in the surroundings of the arrangement. This could be changing magnetic fields caused by transmitter objects or additional ladder-rung systems acting as transmitters. Multiple such sensors and transmitters can be designed in the ladder-rung form, said sensors and transmitters being connected in parallel or in series according to the application under certain circumstances and if necessary assuming the excitation function by moving a conductor through which a direct current is flowing or by applying alternating currents. The aforementioned inductance arrangement results positively in that the coils can all have a completely crossover-free design and are therefore substantially simpler to technically implement for very different applications in electrical engineering. The applicability ranges from short-range distance measuring devices and long-range object location to light detection and efficient induction machines with large or also very small constructions.

An electromagnetic induction type encoder, wherein at least one of widths of a first transceiver coil, a first plurality of conductors and a first receiver coil of a first track in a direction vertical to facing direction between a detection head and a scale and a measurement direction is different from corresponding width of a second transceiver coil, a second plurality of conductors and a second receiver coil in the direction vertical to the facing direction and the measurement direction.

The present disclosure provides tracking systems and methods. One such method comprises generating a continuous wave signal over a frequency range; applying the continuous wave signal to a reading coil element that is electromagnetically coupled to a sensor array, wherein the sensor array comprises a plurality of sensing resonators tuned at different resonance frequencies, where an output frequency response of the sensor array varies as a function of a location of a target object or a shape of the target object within a coverage area of the sensor array; acquiring frequency spectrum data showing changes in the output frequency response of the sensor array from the reading coil element; and predicting, by a control unit device using machine learning, a location of the target object within the coverage area or a behavior of the target object based on the acquired frequency spectrum data. Other methods and systems are also provided.

A position of a target is determined using a linear inductive position sensor that includes a target coil, an excitation coil, two sensors and a Vernier processor. The sensors each include two or more receive coils. The receive coils include multiple twisted loops. In the first sensor, the coils have a first period, with loops offset by first distance. In the second sensor, the coils have a second period, with loops offset by a second distance. The target coil width is a function of the first distance and the second distance. During operation, the coils output voltages in which third, fifth and/or seventh harmonics are cancelled. Based on the voltages, the sensors output respective first and second position signals, from which the Vernier processor calculates the target’s position along an axis of the position sensor.

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 -fold symmetry and a first pickup coil arrangement with -fold symmetry and a second pickup coil arrangement with -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.