Various embodiments provide a magnetic sensing scheme for a voltage regulator circuit. The voltage regulator circuit may include a first inductor (also referred to as an output inductor) coupled between a drive circuit and an output node. The voltage regulator circuit may further include a second inductor (also referred to as a sense inductor) having a first terminal coupled to the first inductor at a tap point between terminals of the first inductor. The second inductor may provide a sense voltage at a second terminal of the second inductor. A control circuit may control a state of the voltage regulator circuit based on the sense voltage to provide a regulated output voltage at the output node. Other embodiments may be described and claimed.

Methods and apparatus for a sensor with a main coil to direct a magnetic field at a rotating target for inducing eddy currents in an end of the target and a sensing element to detect a magnetic field reflected from the target, wherein the target end comprises a conductive surface. The reflected magnetic field can be processed to determine an angular position of the target.

Improved techniques for remotely monitoring and managing fasteners and fastener driver conditions, are provided. In some aspects of the invention, conditions of a fastener and/or structural material(s) held by the fastener and/or connector, are monitored by a control system including sensor(s) at least partially embedded in, on or throughout the fastener and/or structural material(s). When an adverse condition is sensed, a torque may be remotely applied to the fastener, in some embodiments. In some embodiments, other remedial actions may be taken by the control system. In some embodiments, such sensor(s) include a magnetizable array, which may include one or more charge-carrying and/or otherwise magnetic wires or particles on, about, or embedded within, the fastener and/or structural material. In some embodiments, such remote monitoring includes testing a magnetic signature of the fastener and/or structural material (e.g., via remote scanning and/or testing).

A detecting device includes a reading coil configured to read a magnetic flux generated by a detecting coil for detecting a magnetic field of an electromagnetic wave output from an exciting coil according to the magnetic field. The detecting device further includes a Q-value measuring section configured to measure a Q-value of the detecting coil on a basis of a temporal transition of oscillation of a voltage obtained in the reading coil according to the magnetic flux generated by the detecting coil.

A method of determining a value of a magnetic characteristic of a wireless-power receiver system includes: obtaining a first frequency indication of a first resonant frequency of a power reception circuit of the wireless-power receiver system corresponding to a power transmit circuit and the power reception circuit being in a first state having a first combined circuit configuration; obtaining a second frequency indication of a second resonant frequency of the power reception circuit corresponding to the combination of the power transmit circuit and the power reception circuit being in a second state having a second combined circuit configuration, the first combined circuit configuration differing from the second combined circuit configuration by at least one of component content or a value of at least one component; and using the first frequency indication and the second frequency indication to determine the value of the magnetic characteristic of the wireless-power receiver system.

Embodiments of the disclosure provide magnetic sensing systems and methods for a galvanometer scanner configured to rotate within a predetermined angular range. An exemplary magnetic sensing system includes a disc permanent magnet configured to provide a magnetic field. The magnetic sensing system further includes a Hall sensor configured to generate a voltage proportional to the strength of the magnetic field as the Hall sensor and the disc permanent magnet move relatively to each other when the galvanometer scanner rotates. One of the disc permanent magnet and the Hall sensor locates on and rotates with the galvanometer scanner and the other locates off the galvanometer scanner. The magnetic sensing system also includes at least one controller configured to determine a rotation angle of the galvanometer scanner based on the generated voltage by the Hall Sensor.

A vehicle configured to receive an input of a shift command corresponding to a change in position of a vehicle accessory seated in a shift command input portion and a control method for the same, may include a vehicle accessory; a shift command input portion in which the vehicle accessory is configured to be seated and which receives an input of a shift command corresponding to a change in position of the seated vehicle accessory; a shift device configured to change a shift range; and a controller configured to control the shift device to change the shift range in accordance with the shift command input by the shift command input portion.

A magnetic field sensor includes a die and a current generator in the die. The current generator generates a driving current. A Lorentz force transducer is also formed in the die and coupled to the current generator to obtain measurements of a magnetic field based upon the Lorentz force. The magnetic field has a resonance frequency and the current generator drives the Lorentz force sensor with the driving current having a non-zero frequency different from the resonance frequency.

The problem to be overcome by the present disclosure is to reduce harmonic components included in output signals. A magnetic sensor includes a detecting magnetoresistance element and a canceling magnetoresistance element. A tilt angle formed by a magnetic sensing direction of the canceling magnetoresistance element with respect to a magnetic sensing direction of the detecting magnetoresistance element falls within a predetermined range. The predetermined range is defined by reference to either n??/3 or n??/3+?/2, where ? is an angle of rotation of a rotator corresponding to one cycle of a fundamental harmonic included in output signals of the detecting magnetoresistance element and n is a natural number equal to or greater than 1.

A method of determining a value of a magnetic characteristic of a wireless-power receiver system includes: obtaining a first frequency indication of a first resonant frequency of a power reception circuit of the wireless-power receiver system corresponding to a power transmit circuit and the power reception circuit being in a first state having a first combined circuit configuration; obtaining a second frequency indication of a second resonant frequency of the power reception circuit corresponding to the combination of the power transmit circuit and the power reception circuit being in a second state having a second combined circuit configuration, the first combined circuit configuration differing from the second combined circuit configuration by at least one of component content or a value of at least one component; and using the first frequency indication and the second frequency indication to determine the value of the magnetic characteristic of the wireless-power receiver system.