A heading calibration method, adapted for a compass sensor is provided. The heading calibration method includes the following steps. R data segments are sequentially generated by rotating the compass sensor by a predetermined angle, wherein the data segments includes a plurality of magnetic data respectively. A partial calibration process is executed to calibrate a reference point coordinate according to the magnetic data in r.sup.th data segment and a initial value of the reference point coordinate, wherein r is between 1 and the R. Parts of the magnetic data in the r.sup.th data segment is extracted as whole data, and a whole calibration process is executed according to the whole data to update an initial value of the reference point coordinate. The partial calibration process is executed according to the updated initial value of the reference point coordinate and the magnetic data in a (r+1).sup.th data segment.

Methods and apparatus for a magnetic field sensor including a die, a coil proximate the die to generate a magnetic field, and a magnetic field sensing element having to detect changes in the magnetic field generated by the coil in response to a ferromagnetic target.

A method and apparatus are provided for calibrating a sensor under disruptive conditions. The apparatus includes user equipment. The user equipment includes a memory element and processing circuitry coupled to the memory element. The processing circuitry monitors at least one sensor of the user equipment. The at least one sensor includes an existing calibration. The processing circuitry also identifies a disruption in a sensor of the at least one sensor, the disruption causing unexpected sensor readings for the sensor based on the existing calibration. The processing circuitry also calculates a new calibration based on the disruption.

A device that includes a sensor unit and a processing unit. The sensor unit is configured to detect at least one measured value at a predetermined point in time. The processing unit is configured to carry out a self-calibration of the device as a function of the detected measured value. A method for self-calibration of a device is also described.

A position sensing system has a trim unit to trim hall voltages generated by a first sensor and a second sensor in response to an excitation current, to compensate a non-orthogonality of the first sensor and the second sensor.

Adjusting of calibration parameters for a sensor. The adjusted calibration parameters may be used to correct the raw data of the sensor. It is provided to calculate new calibration parameters only when accuracy of the calibration parameters currently available is no longer adequate, and suitable measurement data are available for a recalibration of the sensor. Otherwise, the components necessary for calibrating the sensor data may be deactivated in order to reduce energy consumption.

A method for making moldable and cuttable composite material for magnetic moment calibration of samples with specific shapes is provided. The method is used to quantify a magnetic moment per unit weight from the moldable and cuttable composite material. The moldable and cuttable composite material is made by a non-magnetic matrix with superparamagnetic particles, paramagnetic particles, or ferromagnetic particles without anisotropy. Then, the moldable and cuttable composite material is shaped and tailored into calibration samples with specific shapes. The method provides a method for making calibration samples with the specific shapes, wherein the calibration samples are easily shaped and tailored to same or similar shapes and sizes as test samples. The method improves an original method for making a standard calibration sample, wherein the original method only used pure nickel ball or high purity palladium wire structure.

A Hall sensor has a Hall sensor element, which has multiple connection points spaced apart from one another. A supply source serves for feeding an exciter current into the Hall sensor element and is connected to a first and a second connection point of the Hall sensor element. The Hall sensor has a first and a second comparison device. The first comparison device has a first input connected to a third connection point of the Hall sensor element, a second input connected to a reference signal generator for an upper reference value signal, and an output for a first comparison signal. The second comparison device has a third input connected to the third connection point, a fourth input connected to a reference signal generator for a lower reference value signal, and an output for a second comparison signal. The outputs are connected to an evaluation device for generating an error signal as a function of the first and second comparison signal.

The present invention relates to a sensor suite comprising at least one sensor. More particularly, the present invention relates to a sensor suite for measuring absolute and/or relative position, location and orientation of an object on or in which the sensor suite is employed. The present invention further relates to improved, novel sensor types for use in the sensor suite. More particularly, the present invention relates to an improved, novel magnetometer that is self-calibrating and scalable. Still more particularly, the present invention relates to such a magnetometer that is miniaturized. Further embodiments of the present invention relate to systems and methods for providing location and guidance, and more particularly for providing location and guidance in environments where global position systems (GPS) are unavailable or unreliable (GPS denied and/or degraded environments).

There is provide a magnetic field measurement device including: a magnetic sensor array configured by a plurality of magnetic sensor cells, each of which has a magnetic sensor; a magnetic field acquisition section configured to acquire measurement data measured by the magnetic sensor array; a signal space separation section configured to perform signal separation to separate, into internal space data and external space data, a spatial distribution of a magnetic field which is indicated by the measurement data, based on a position and a magnetic sensitivity of each magnetic sensor; and a calculation processing section configured to remove, from the internal space data, at least a part of a variation component common to magnetic field measurement data that indicates the spatial distribution of the magnetic field which is indicated by the measurement data, and the external space data.