Abstract: A method for calibrating a rotary encoder for capturing rotational angle position of a machine shaft. The rotary encoder includes an exciter unit which is rotationally fixed to the machine shaft, and a stationary sensor unit which interacts therewith. The method includes rotating the machine shaft to perform a rotational movement at a predefined rotational speed at a first sensor temperature, capturing a first position measured value at a first predefined rotational angle position at the first sensor temperature, heating or cooling the sensor unit to a second sensor temperature, capturing a second position measured value at the first predefined rotational angle position at the second sensor temperature, determining a first deviation between at least the second position measured value and a first desired position measured value, and correcting an output signal from the rotary encoder via the first deviation.

Abstract: A superconducting electronic circuit includes at least two SQUID elements, an array of at least three Josephson Junctions, and a magnetic source element. Each SQUID element has no shared Josephson Junctions or at least one shared Josephson Junction with another SQUID element and at least one exclusive Josephson Junction. The array of at least three Josephson Junctions are connected in one, two, or three-dimensions. The magnetic source element has an electrically-tunable spatially non-uniform magnetic field.

Abstract: A receiver for detecting at least one electromagnetic signal while the receiver is moving relative to the Earth's magnetic field, the receiver comprising: an SQUID array for generating an output that is a transfer function of SQUID array magnetic flux that is supplied from a combination of an oscillating magnetic field of the at least one electromagnetic signal, the Earth's magnetic field, and a bias magnetic field; a bias-tee configured to divide the SQUID array output into a DC signal and an RF signal; a memory store configured to store a plurality of voltage and flux bias values, wherein each voltage value has a corresponding flux bias value that results in maximum SQUID array sensitivity; and a logic circuit configured to find a voltage value in the memory store that most closely matches the DC signal, and to apply to the SQUID array a flux bias corresponding to the most closely matched voltage value.

Abstract: A test and measurement instrument for measuring a current in a device under test, comprising an input configured to receive signals from a magnetic field probe; and one or more processors configured to measure, from a signal from the magnetic field probe, a magnetic field generated by a current-carrying conductor of the device under test based on a known current, determine a calibration factor based on the known current and the magnetic field, and generate a calibrated measurement of an unknown current in the current-carrying conductor using a magnetic field generated by the current-carrying conductor based on the unknown current and the calibration factor.

Abstract: In response to detecting that an external device is within communication range of an electronic device and in accordance with a determination that the external device is in a pairing mode, the electronic device displays an affordance corresponding to a pairing application of the electronic device. In response to detecting that an external device is within communication range of an electronic device and in accordance with a determination that the external device is not in the pairing mode, the electronic device forgoes display of the affordance. In response to user input corresponding to selection of the affordance, the electronic device displays a user interface associated with initiating a process to pair the electronic device and the external device.

Abstract: A RF antenna or sensor has a substrate, a resonator operable at UHF disposed on the substrate, the resonator preferably having a quartz bar or body with electrodes disposed on opposing major surfaces thereof and with a magnetostrictive material disposed on or covering at least one of the electrodes. A pair of trapezoidal, triangular or wing shaped high permeability pole pieces preferably supported by that substrate are disposed confronting the resonator, one of the pair being disposed one side of the resonator and the other one of the pair being disposed on an opposing side of said resonator, the pair of high permeability pole pieces being spaced apart by a gap G, the resonator being disposed within that gap G. The size of gap G is preferably less than 100 ?m.

Abstract: A method for actively calculating and monitoring the oil debris monitor phase angle includes sensing a noise from an in-line oil debris monitor sensor in an oil flow path, generating a polar plot of an I and Q channel data from only the noise. Linear regression of noise is then utilized from the I and Q channel data for calculating a slope of regression form the linear regression and converting the slope to a phase angle.

Abstract: A sensor drive circuit for driving a sensor with a current includes at least one circuit configured to generate a drive current for the sensor, the drive current having a reverse temperature characteristic with respect to a temperature characteristic of an output voltage of the sensor. A temperature characteristic of sensor sensitivity has a negative first order coefficient and a positive second order coefficient. The sensor drive circuit includes a first current source configured to generate a first current having a temperature characteristic of which a first order coefficient is positive. The sensor drive circuit includes a second current source configured to generate a second current having a temperature characteristic of which a first order coefficient is negative. The sensor drive circuit includes a first current calculator configured to add the first current and the second current to generate a third current.

Abstract: A radio-frequency method for range finding includes modulating a reference signal having an intermediate frequency to a downlink signal having a carrier frequency using a clock signal. The downlink signal is transmitted to a tag using a transceiver. An uplink signal backscattered from the tag is received and demodulated using the clock signal. The uplink signal has a frequency that is a harmonic of the carrier frequency. A distance between the tag and the transceiver is calculated based on a phase of the demodulated uplink signal. A system for range finding includes a transceiver and a processor. The transceiver modulates a reference signal to a downlink signal and transmits the downlink signal. The transceiver receives and demodulates an uplink signal. The processor is configured to receive the demodulated uplink signal and calculate a distance between the tag and the transceiver using a phase of the demodulated uplink signal.

Abstract: The magnetic sensor of the invention has an element portion that is elongate, that exhibits magnetoresistive effect and that has a magnetically sensitive axis in a direction of a short axis thereof. The element portion is non-oval and can be arranged in an imaginary ellipse, wherein the imaginary ellipse has a major axis that connects both ends of the element portion with regard to a direction of a long axis thereof to each other and a minor axis that connects both ends of the element portion with regard to a direction of the short axis thereof to each other, as viewed in a direction that is perpendicular both to the short axis and to the long axis of the element portion.

Abstract: In one embodiment, a method for detecting tremors includes generating electromagnetic fields proximate to an individual's body part with a circuit to generate an eddy current density on a surface of the body part, receiving magnetic fields generated by the eddy current with the circuit that change a resonant frequency of the circuit, sensing the resonant frequency as it changes over time, and determining a movement frequency of the body part from the resonant frequency to quantify tremors in the body part.

Abstract: An integrated circuit with a switched signal path and circuitry configured to determine an anticipated specification current through the signal path.

Abstract: The present invention relates to a hall electromotive force signal detection circuit and a current sensor thereof each of which is able to achieve excellent wide-band characteristics and fast response as well as high accuracy. A difference calculation circuit samples a component synchronous with a chopper clock generated by a chopper clock generation circuit, out of an output voltage signal of a signal amplifier circuit, at a timing obtained from the chopper clock, so as to detect the component. An integrating circuit integrates an output from the difference calculation circuit in the time domain. An output voltage signal from the integrating circuit is fed back to a signal amplifier circuit via a third transconductance element.

Abstract: Embodiments of an inline inspection (“ILI”) tool (10) of this disclosure include a plurality of composite field systems (20) arranged circumferentially about the body of the ILI tool, each composite field system including multiple magnetic circuits (60) to produce a composite or resultant angled field © relative to the target, along with a sensor array or circuit (40) configured for magnetic flux leakage (“MFL”) or magnetostrictive electro-magnetic acoustic transducers (“EMAT”) implementations. In embodiments, the pole magnets (61) of the magnetic circuits are oriented in the axial direction of the tool body rather than in the direction of the resultant angled field. The same is true of the sensors (43). This composite field system approach provides options to design geometries that were not previously possible in prior art single-circuit helical MFL designs and EMAT designs.

Abstract: The present invention provides an eddy current flaw detection device capable of applying a sufficiently strong magnetic field to a test object without using a significantly large magnet. A magnetic-field forming magnet 60 includes a base magnet piece 60a and a tip magnet piece 60b. The tip magnet piece 60b has a tip pole face 62 from which a magnetic pole is directed toward a test object 30. The tip pole face 62 has a smaller area than a base face 64 of the base magnet piece 60a, the base face 64 being located on the opposite side of the magnetic-field forming magnet 60 from the tip pole face 62.

Abstract: A current sensor and measurement system including such a current sensor. The current sensor includes: an insulating substrate provided with a central opening; a winding surrounding the central opening and including a coil wound around a portion of the insulating substrate; wherein the current sensor includes at least one ferromagnetic layer incorporated within the portion of the insulating substrate, the coil surrounding the ferromagnetic layer.

Abstract: The invention relates to a complex proximity safety and warning system. The invention provides a safety system comprising a generator that generates a magnetic field that establishes a boundary, where the generator is capable of receiving radio frequency signals. Also provided is a radio frequency device that sends radio frequency signals, the radio frequency device being capable of sensing the magnetic field and generating a radio frequency response.

Abstract: A component carrier with an integrated magnetic field sensor is disclosed. The component carrier includes a plurality of electrically conductive layer structures and/or electrically insulating layer structures; an excitation coil and sensor coils arranged on and/or in the layer structures; a first magnetic structure above the excitation coil and sensor coils; and a second magnetic structure below the excitation coil and sensor coils.

Abstract: A sensor assembly includes a connecting bar extending along a longitudinal axis and a tubular body extending along the longitudinal axis and at least partially surrounding the connecting bar such that the tubular body is radially spaced from the connecting bar. The tubular body includes a support member made of insulating material. The tubular body also includes a first section with an electric field sensor comprising a first layer of electrically conductive material on an inner surface of the support member to detect an electric field produced by the connecting bar. The first section also includes a first electric screen comprising a second layer of electrically conductive material on an outer surface of the support member to shield the electric field sensor from outside electrical interference. A second section disposed adjacent the first section includes a second electric screen. A dielectric material at least partially encloses the tubular body.

Abstract: An apparatus for automated inspection or maintenance is provided. The apparatus includes a dual slider mechanism for deploying a probe. The dual slider mechanism comprises: a frame; a probe slider configured to attach the probe; a probe linear guide coupled to the frame and configured to guide the probe slider and attached probe in a linear direction; a spring having one end attached to the probe slider; a spring slider attached to another end of the spring; and a spring linear guide coupled to the frame and configured to guide the spring slider and attached spring in the linear direction, in order to guide the probe slider and attached probe in the linear direction along the probe linear guide using the guided spring.

Abstract: A capacitive voltage sensor for estimating voltage on a power line. The sensor includes a dielectric bushing surrounding the line, and an annular conductor formed in the bushing and being capacitively coupled to the line, where a first capacitance is defined between the line and the annular conductor and a second capacitance is defined between the annular conductor and ground. The sensor also includes a capacitance compensation circuit having an amplifier including a first terminal electrical coupled to the annular conductor, and first and second capacitance compensation capacitors electrically coupled to the terminals of the amplifier, where the compensation capacitors are made of different materials having different dielectric constants, and where the materials of the compensation capacitors are selected so as to compensate for changes in the first and second capacitances in response to temperature changes. Also, a thermistor is provided in a resistor compensation circuit to provide resistance compensation.

Abstract: Aspects of the present disclosure generally pertain to a magnetic field sensor with flex coupling structures. Aspects of the present disclosure are more specifically directed toward Nanoscale Superconducting Quantum Interference Devices (nanoSQUIDs) with very low white flux noise characteristics can be fashioned into very sensitive magnetic field sensors by using external structures to increase the amount of flux that passes through the nanoSQUID aperture. Aspects of the present disclosure are also directed toward a magnetic flux pickup that can be coupled to a SQUID or nanoSQUID and incorporates an input coil made of a superconducting tape, which may be embodied in an electronic device for sensing magnetic fields, or more specifically an application specific electronic device for sensing a sensed property such as for geophysical sensing or biomedical imaging.

Abstract: The described embodiments relate to a method for analyzing a sample volume including magnetic particles. The method may include applying an electric excitation signal to a measuring coil so as to generate a magnetic field acting on the sample volume using the measuring coil. Furthermore, the method may include sensing an electric measurement signal dependent on the inductance of the measuring coil and analyzing magnetic permeability of the sample volume using the measurement signal.

Abstract: A device of detecting magnetic characteristic change for a long material includes: an exciting coil into which the long material is inserted and which magnetizes the long material in a longitudinal direction; a detecting coil into which the long material is inserted and which detects a magnetic flux generated in the long material due to magnetization by the exciting coil; and a yoke member which has a first opening portion which is positioned on one side of the long material in the longitudinal direction and into which the long material is inserted and a second opening portion which is positioned on the other side of the long material in the longitudinal direction and into which the long material is inserted, and has a shape which is substantially axially symmetrical about an axis passing the first opening portion and the second opening portion, and the exciting coil and the detecting coil are surrounded by the yoke member, the first opening portion, and the second opening portion.

Abstract: A magnetic field sensor comprises a substrate and two comb-shaped soft ferromagnetic flux concentrators with an interdigitated structure formed on the substrate. The concentrators comprise N and N?1 rectangular comb teeth and corresponding comb seats wherein N is an integer greater than 1. Gaps are formed between the comb teeth of one concentrator and the comb seat of the other concentrator in an X direction. Adjacent comb teeth in a +Y direction form 2m?1 odd space gaps and 2m even space gaps. Here, m is an integer greater than zero and less than N. Push and pull magnetoresistive sensing element strings are located respectively in the odd space gaps and the even space gaps, and are electrically interconnected into a push-pull bridge. The magnetization alignment directions of the ferromagnetic pinned layer of the magnetic sensing element strings are Y direction.

Abstract: An endoscope includes a sensor, and a temperature compensation circuit configured to perform temperature compensation of an output signal of the sensor, in a distal end portion. The temperature compensation circuit includes a differential amplifying section configured to amplify an output signal of the sensor, and a temperature sensing section in which a resistance is connected in series to a parallel connection portion of a temperature sensing element and a resistance.

Abstract: A magnetic field sensor includes at least one magnetic field sensing element configured to generate a magnetic field signal indicative of a magnetic field associated with a target, an analog-to-digital converter configured to convert the magnetic field signal into a digital magnetic field signal, and a controller responsive to the digital magnetic field signal and configured to adjust an offset of the digital magnetic field signal during a first operational phase and to increase a gain of the digital magnetic field signal during a second operational phase following the first operational phase. The first and second operational phases occur during a running mode of sensor operation.

Abstract: Closed loop current transducer includes a fluxgate sensing unit, a compensation coil wound around the fluxgate sensing unit, and a transducer housing mounted around the compensation coil, the fluxgate sensing unit comprising a fluxgate housing, a ring-shaped fluxgate magnetic field detector mounted in the fluxgate housing, and a magnetic shield mounted in the fluxgate housing, the magnetic shield surrounding the fluxgate magnetic field detector. The fluxgate housing includes first and second central parts, each central part comprising a radially inner side wall, a radially outer side wall and a base wall joining the inner side wall to the outer side wall, a sensor housing portion being formed on one side of the base wall and receiving the fluxgate magnetic field detector therein.

Abstract: Sensor devices, systems and methods are provided, including a first magnetic sensor configured to measure a first magnetic field in a first frequency range and output a first sensor signal based on the measured first magnetic field, a second magnetic sensor configured to measure a second magnetic field in a second frequency range and output a second sensor signal based on the measured second magnetic field, and a sensor circuit configured to receive the first and the second sensor signals, combine the first and the second sensor signals, and output a combined sensor signal. The first magnetic sensor and the second magnetic sensor are configured to share a cross-over frequency.

Abstract: Methods and apparatus for a TMR-based sensor having a first magnetic field sensing element comprising a bridge having first, second, third, and fourth legs. Legs of the bridge comprise TMR elements with pillars connected to one or more switch matrixes to adjust total resistances of the bridge legs. Equalizing the resistance of the bridge legs can enhance sensor performance.

Abstract: We provide a Hall effect sensor driven with an AC current where the output Hall signal component is at the second harmonic. More specifically, the drive current is at fA and the relevant Hall signal frequency component is at 2fA. The resulting measurement is of the magnetic field strength at fA. This eliminates the need for switching to suppress the parasitic offset signal. This approach also leads to suppression of the induced signal caused in the Hall sensor by the time varying magnetic field.

Abstract: One example includes a tunable current element. The element includes a first magnetic flux component that is configured to exhibit a bias flux in response to a first control current. The bias flux can decrease relative energy barriers between discrete energy states of the tunable current element. The element also includes a second magnetic flux component that is configured to exhibit a control flux in response to a second control current. The control flux can change a potential energy of the discrete energy states of the tunable current element to set an energy state of the tunable current element to one of the discrete energy states, such that the magnetic flux component is configured to generate a hysteretic current that provides a magnetic flux at an amplitude corresponding to the energy state of the tunable current element.

Abstract: The present invention relates to a hall electromotive force signal detection circuit and a current sensor thereof each of which is able to achieve excellent wide-band characteristics and fast response as well as high accuracy. A difference calculation circuit samples a component synchronous with a chopper clock generated by a chopper clock generation circuit, out of an output voltage signal of a signal amplifier circuit, at a timing obtained from the chopper clock, so as to detect the component. An integrating circuit integrates an output from the difference calculation circuit in the time domain. An output voltage signal from the integrating circuit is fed back to a signal amplifier circuit via a third transconductance element.

Abstract: An electronic device displays at least one device initialization screen. After displaying the at least one device initialization screen, the electronic device displays an instruction screen instructing a user to pair the external device with the electronic device. The electronic device sends first data via wireless communication, displays a pattern comprising identifying information of the electronic device, and receives second data indicating that the external device and the electronic device have been paired using the first data. After receiving the second data, the electronic device provides an aural or haptic indication that the electronic device and the external device have been paired. In some examples, the electronic device is a wearable electronic device and the external device is a smartphone. Pairing the electronic device and the external device may allow the devices to exchange information and operate interactively with one another.

Abstract: A Hall sensor compensation circuit includes an input node configured for receiving a bias signal for a Hall sensor. A bias node provides to the Hall sensor a compensated bias signal. A compensation network coupled between the input node and the bias node has a gain inversely proportional to Hall mobility, ?n?, wherein the Hall sensing signal is temperature-compensated.

Abstract: A measuring apparatus that measures a measurement target amount generated from a measurement target, includes an additional amount generating section, a sensor, and a deriving section. The additional amount generating section generates an additional amount to be added to the measurement target amount. The sensor measures a composite amount of the measurement target amount added with the additional amount. The deriving section derives the measurement target amount from an output of the sensor. The additional amount is a pulse. The pulse has an amplitude higher than the absolute value of the maximum of the measurement target amount. The maximum of the pulse is zero. The pulse has a frequency high enough to ignore the 1/f noise. The deriving section detects the output value of the sensor to derive the measurement target amount.

Abstract: 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).

Abstract: A comprehensive information detection system for a steel wire rope, having a detection device, a stroke metering device, a data acquisition and conversion workstation, an alarm controller, and a terminal control master station is provided. The detection device further specifically has a steel wire rope electromagnetic detection device, a steel wire rope machine vision damage recognition device, a steel wire rope machine vision diameter measurement device, and a damage location marking device. The comprehensive information detection system for a steel wire rope may perform comprehensive evaluation on the damage situation of the steel wire rope and refine damage data information, thereby comprehensively improving the refinement degree of detection and the detection accuracy.

Abstract: Magnetic field sensors and sensing methods are provided. A magnetic sensor includes at least one magnetic field sensor element configured to generate an analog input sensor signal in response to a magnetic field; an inverting amplifier arranged on an analog signal path and configured to generate an analog output sensor signal having a gained value with respect to the analog input sensor signal; a switchable compensation capacitor disposed in a negative feedback path of the inverting amplifier, where the switchable compensation capacitor is configured to control a bandwidth of the analog signal path based on configuration information; and a digital controller configured to receive at least one measurement parameter, generate the configuration information based on the at least one measurement parameter, and transmit the configuration information to the switchable compensation capacitor for adjusting the bandwidth of the analog signal path.

Abstract: A security screening installation system for use in a controlled environment is described. In an embodiment, a passive detector apparatus does not produce a magnetic field for detection and relies on detecting changes in the local magnetic field. The apparatus is: (i) battery powered; (ii) light enough to be hand carried by hand and set up by one person; (iii) comprises a single elongate housing; and (iv) operable between a packed state inside a protective case and a ready to use state outside of the protective case. The housing supports at least two magnetic sensors that define a gradiometer which is arranged to produce a signal indicative of an ambient magnetic field or gradient over a zone of sensitivity which extends away from the housing, wherein a size of the zone is large enough to contain a whole body of a person.

Abstract: A magnetic field sensor comprises a magnetoresistance element with a variable conductivity that changes based on a function of a magnetic field strength and angle of an external magnetic field and a voltage across the magnetoresistance element. A circuit is included to monitor an electrical current through the magnetoresistance element during operation and to apply a constant voltage across the magnetoresistance element based on the monitored electrical current so that the variable conductivity does not change as result of a changing voltage across the magnetoresistance element.

Abstract: A fluid sensor including a guide, a float, a permanent magnet, and a magnetic angle sensor. In one example, the float is constrained at least in part by the guide to move along a vertical axis. The permanent magnet is mechanically coupled to the float. The magnetic angle sensor is configured to measure an angle of a magnetic field generated by the permanent magnet and is positioned such that movement of the float along the vertical axis varies the angle of the magnetic field generated by the permanent magnet through the magnetic angle sensor.

Abstract: An electromagnetic (EM) position tracking system identifies the pose of objects based on detected strength values of an EM field. To address distortions in the field, the system employs a pose sensor to provide a second pose of the mobile unit. Under conditions where no distortion in the EM field has been detected, the HMD applies a nominal set of corresponding weights to the EM pose data and the IMU pose data, respectively, and combines the weighted pose value to identify a combined pose of the mobile unit. In response to detecting conditions that indicate distortion in the EM field, the HMD can apply different weights to the EM pose data and IMU pose data to, for example increase the influence of the IMU pose data on the combined pose.

Abstract: The invention relates to a device having, as a sensor for detecting an object arranged behind an article that is transparent to electromagnetic radiation, a coil assembly having a first transmitting coil (1.1) and a first receiving coil (2.1) arranged orthogonally with respect to the first transmitting. An evaluation unit evaluates the output signals from the coil assembly. The fact that the coil assembly comprises the first transmitting coil (1.1) and at least one further transmitting coil (1.2, 1.3, 1.4), and the first receiving coil (2.1) and at least one further receiving coil (2.2, 2.3, 2.4), wherein axes (1.5, 1.6) of the first and of the at least one further transmitting coil are orthogonal to each other, and the axes (1.5, 1.6) of the first and second transmitting coil intersect the axis (2.5) of the first receiving coil (2.1) that is orthogonal to the first and second transmitting coils (1.1, 1.2), means that a device is provided that reduces or even eliminates the grating effect.

Abstract: An apparatus for detecting inner defects of a steel plate comprises an all-defect detection unit for detecting all defects including surface defects present on the surface of the steel plate and inner defects present inside the steel plate by intensity of leakage flux, measured by generating magnetic flux in a strike direction of the steel plate; a surface defect detection unit for detecting surface defects by intensity of leakage flux, measured by generating magnetic flux in the thickness direction of the steel plate, for a predetermined detection region including all the defects detected by the all-defect detection unit; and a data processing unit for detecting only inner defects present in a detection region by excluding the detected surface defects from all the defects detected by the all-defect detection unit, for the detection region, thereby detecting only the inner defects of the steel plate.

Abstract: A non-transitory computer readable medium may include executable instructions which, when executed by a processor, cause the processor to provide for a repository of digital content, and to provide for a store configured to sell a right to use the digital content to a customer and to transmit the digital content to a non-destructive testing (NDT) device, and wherein the digital content is configured to be executed by, used by, or displayed the NDT device, or a combination thereof.

Abstract: A magnetic anomaly sensing system and method uses two triaxial magnetometer (TM) sensors arranged in a one-dimensional array with the sensors' magnetic sensing axes being parallel to one another. The sensors are spaced-apart from one another along one of the sensing axes by a distance D with a midpoint between the sensors along the one sensing axis being located a distance Z from a reference datum. A processor implements an iterative process to include generating scalar magnitudes of a magnetic anomaly field measured at each of the sensors where the magnetic anomaly field is associated with a magnetic object. A scalar range from the sensors to the magnetic object is generated based on the distance D, the distance Z, and the scalar magnitudes. A magnetic dipole moment of the magnetic object is generated using the scalar range and the scalar magnitudes.

Abstract: An apparatus comprises a first substrate and two coils supported by the first substrate and arranged next to each other, the coils configured to each generate a magnetic field which produces eddy currents in and a reflected magnetic field from a conductive target, the two coils arranged so their respectively generated magnetic fields substantially cancel each other in an area between the coils. One or more magnetic field sensing elements are positioned in the area between the coils and configured to detect the reflected magnetic field.

Abstract: An electronic device displays at least one device initialization screen. After displaying the at least one device initialization screen, the electronic device displays an instruction screen instructing a user to pair the external device with the electronic device. The electronic device sends first data via wireless communication, displays a pattern comprising identifying information of the electronic device, and receives second data indicating that the external device and the electronic device have been paired using the first data. After receiving the second data, the electronic device provides an aural or haptic indication that the electronic device and the external device have been paired. In some examples, the electronic device is a wearable electronic device and the external device is a smartphone. Pairing the electronic device and the external device may allow the devices to exchange information and operate interactively with one another.

Abstract: Systems, methods, apparatuses and non-transitory computer-readable mediums are disclosed for a self-calibrating system architecture for magnetic distortion compensation. In an embodiment, an electronic system comprises: a magnetometer; a plurality of spaced-apart calibration coils proximate to the magnetometer; first circuitry configured to excite the calibration coils during a calibration phase of the electronic system; second circuitry configured to measure a first magnetic field vector in a vicinity of the magnetometer that is generated by the excited calibration coils; third circuitry configured to: generate sensitivity values based on the first magnetic field vector measurement and a baseline magnetic field vector; and a storage device configured for storing the sensitivity values.