A first magnetic field generator generates a magnetic field intersecting a detection object being transported along a transport path. A second magnetic field generator opposite to the first magnetic field generator with respect to the transport path generates a magnetic field intersecting the detection object. A first magnetoresistive element between the first magnetic field generator and the transport path outputs, as a change in resistance, a change in magnetic flux density produced by transport of the detection object. The first and second magnetic field generators are different in a magnetic pole facing the transport path and are arranged with a center of the first magnetic field generator in a transport direction of the detection object and a center of the second magnetic field generator in the transport direction are located at mutually different positions. The first magnetoresistive element includes a first resistor and a second resistor arranged with spacing therebetween.

Disclosed herein is a magnetic sensor that includes a first magnetic field sensor that detects an environmental magnetic field to generate a first magnetic field signal, a second magnetic field sensor that detects a detection target magnetic field to generate a second magnetic field signal, a first filter that removes an AC component in a predetermined frequency band from the first magnetic field signal to extract a DC component, a first compensation coil that applies a first cancelling magnetic field to the second magnetic field sensor based on the DC component, a second compensation coil that applies a second cancelling magnetic field to the second magnetic field sensor based on the second magnetic field signal, and a second filter that removes an AC component in at least a predetermined frequency band from the second magnetic field signal.

An integrated sensor and method for manufacturing the sensor includes a first component having a first material with a predetermined first value of coefficient of thermal expansion (CTE), and a second component over the first component. The second component includes a second material with a predetermined second value of CTE different from the first value. An interlayer is provided by molecular layer deposition, for minimizing stress caused by coefficient of thermal expansion mismatch between the first and second components. The interlayer includes an organic-inorganic hybrid polymer compound.

A method of manufacture of a sensor and a sensor for sensing a magnetic field generated by a current in a conductive substrate includes a first substrate having a sensing element for sensing magnetic field, and a second substrate is the conductive substrate. A conformal layer is provided by atomic layer deposition between the first substrate and the second substrate, thus protecting at least the sensing element from discharge from the second substrate.

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.

This proximity sensor includes: a cylindrical housing having an opening at one end in the axial direction; a detection part housed at the other end of the housing and detecting the presence or absence of a detection target contactlessly; a substrate housed in the housing and mounted with a control circuit for controlling the detection part; a detection part shield preventing external noise from entering the detection part and including a first face part adhered to the front surface on the other side of the detection part, and a side face part configured from multiple side pieces connected to the outer periphery of the first face part and bent from the first face part to cover the side surface of the detection part; and a resin provided around the detection part and the detection part shield.

In one aspect, an angle sensor includes a first linear sensor and a second linear sensor. A first magnetic-field direction of a target magnet measured by the first linear sensor is substantially equal to a second magnetic-field direction of the target magnet measured by the second linear sensor. The first linear sensor, the second linear sensor and the target magnet are on an axis. The angle sensor determines an angle of a magnetic field.

A gate detection robot based on a giant magnetoresistance element includes a support, a guide wheel, and two driving wheels are provided at the bottom of the support. The support is provided with a controller, a range-based localization module, and a magnetic flaw detection sensor based on the giant magnetoresistance element. The magnetic flaw detection sensor includes an excitation mechanism, a giant magnetic sensor, and two magnetic concentrators. During detection, the excitation mechanism magnetizes a gate with a magnetic field as a medium. When the surface of the gate has a defect, the magnetic conductivity of the local area is reduced and the magnetic resistance is increased so that magnetic lines are distorted and diffused outside the gate to form a detectable leakage magnetic field signal, the signal is transmitted to the controller, so that the controller obtains a specific location of the detection robot.

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.

An input module includes a base, a keycap assembly and an identification unit. The base includes a magnetic sensor. The keycap assembly is assembled on the base, and the keycap assembly includes a magnetic element. The identification unit is electrically coupled to the magnetic sensor, and the identification unit determines the type of the keycap assembly according to the characteristics of magnetic field lines of the magnetic element sensed by the magnetic sensor. An electronic device is also disclosed.