A multiturn angle detection device includes: a segment counter to count segments in an angular range over the single turn of a rotation shaft; a precision absolute angle detector to generate an absolute angle detection value within the single-turn cycle; and an arithmetic device to generate a multiturn absolute angle detection value by combining the output of the segment counter with the output of the precision absolute angle detector. The segment counter includes: a single power generation sensor; a magnetic field generation source; a sensor element; and a nonvolatile memory to store a count value. The magnetic field generation source applies a two or more-cycle alternating magnetic field per each turn of the rotation shaft axially of a magnetic wire. The arithmetic device uses the count value stored in the nonvolatile memory as it is when receiving external electric power supply.

A system for controlling a steering system of a vehicle includes sensors configured to sense a plurality of values corresponding to operation of the steering system, and a controller configured to receive the sensed plurality of values, the sensed plurality of values including inductive angle signals and a magnetic angle signal, based on the inductive angle signals, obtain a relative angle of a steering shaft using a first Vernier algorithm, based on the relative angle obtained by the first Vernier algorithm and the magnetic angle signal, obtain an absolute angle of the steering shaft using a second Vernier algorithm, and control the steering system based on the absolute angle obtained using the second Vernier algorithm.

The present disclosure provides a magnetoresistive quadrant detector for use in a magnetic sensing device comprising a magnetic multi-turn sensor and an angle turn sensor, in particular, an angle sensor configured to provide 180 absolute angle measurements, such as an anisotropic magnetoresistive (AMR) angle sensor. The quadrant detector is formed of at least two magnetoresistive elements, preferably giant magnetoresistive (GMR) elements, which may be integrated to the multi-turn sensor die or provided on a separate die within the sensor package. The magnetoresistive elements are configured to provide a unique combination of resistance states for each quadrant of magnetic field direction. This quadrant information can then be used to remedy any ambiguities in the multi-turn measurement without needing 360 absolute angle information from the single turn angle sensor.

An encoder system has a reading head and a material measure. The reading head has at least one first position sensor and at least one second position sensor. The position sensors are positioned at a fixed distance from one another in a reading direction. The material measure has a longitudinal direction and a transverse direction. The material measure has a first code segment in the longitudinal direction with a first absolutely coded code track. The reading head and the material measure are positioned relative to one another in such a way that the reading direction corresponds to the longitudinal direction. The reading head and the material measure are movable relative to one another in the reading direction. A first sensor position on the material measure can be detected by the first position sensor and a second sensor position can be detected on the material measure by the second position sensor.

A multiturn angle detection device includes: a segment counter to count segments in an angular range over the single turn of a rotation shaft; a precision absolute angle detector to generate an absolute angle detection value within the single-turn cycle; and an arithmetic device to generate a multiturn absolute angle detection value by combining the output of the segment counter with the output of the precision absolute angle detector. The segment counter includes: a single power generation sensor; a magnetic field generation source; a sensor element; and a nonvolatile memory to store a count value. The magnetic field generation source applies a two or more-cycle alternating magnetic field per each turn of the rotation shaft axially of a magnetic wire. The arithmetic device uses the count value stored in the nonvolatile memory as it is when receiving external electric power supply.