Abstract: A vehicular system (1) includes a lateral shift amount measurement part that has a plurality of magnetic sensors that senses magnetism of magnetic markers (10) arrayed along a vehicle width direction and measures a lateral shift amount that is a positional deviation of a vehicle (5) in a vehicle width direction with respect to the magnetic markers (10) and a course estimation part that uses a difference between the lateral shift amounts with respect to two magnetic markers (10) disposed with a space provided therebetween in a road surface (100S) where the vehicle (5) travels and estimates a deviation of the vehicle (5) in a traveling direction with respect to a line segment direction connecting the positions of the two magnetic markers.

Abstract: Provided is a driving assistance system using a magnetic marker capable of providing more pieces of information. In the driving assistance system for assisting driving of a vehicle, a magnetic marker (1) including a magnet sheet (11) serving as a magnetism generating unit which generates a magnetic field and also an RFID tag (15) as an information providing unit which provides information to a vehicle side is laid on a travelling road of the vehicle, and the vehicle includes a magnetic sensor serving as a magnetism detecting unit which magnetically detects the magnetic marker (1) and also a tag reader as an information acquiring unit which acquires the information provided by the RFID tag (15) included in the magnetic marker (1).

Abstract: Provided is a rotary machine in which the output of a magnetic sensor is hardly lowered even if the rotation speed of a rotor becomes high. The rotary machine includes a rotor, a housing, a magnet, and a magnetic sensor. The rotor axially rotates around a rotation axis. The housing is formed of a conductive material and contains the rotor. The magnet is attached to the rotor such that an arrangement direction of a pair of magnetic poles is in a radial direction of the rotor. The magnetic sensor is attached to the housing. The magnetic sensor detects a time variation of a magnetic field generated from the magnet to detect the rotation speed of the rotor. The magnetic sensor is located on the outside than the magnet in the radial direction. The magnetism sensing direction of the magnetic sensor is orthogonal to the radial direction.

Abstract: Provided is a driving assistance system capable of providing more pieces of information to a vehicle side by using magnetic markers. A driving assistance system (1A) is a system including magnetic markers (1) laid on a travelling road so as to be magnetically detectable and also be able to provide code information to a vehicle side, a vehicle (5) configured to be able to magnetically detect the magnetic markers (1) and also read the code information, and a base station (6) configured to make a reply with corresponding information when receiving the code information from the vehicle (5) reading the code information.

Abstract: Provided are an installing method for efficiently installing a magnetic marker and a work vehicle. In a magnetic marker installing method for installing a magnetic marker to be laid on a road so as to be detectable by a magnetic sensor attached to a vehicle in order to achieve vehicle-side control to achieve assist in driving operation of the vehicle by a driver or automatic driving not relying on operation of the driver, a placing process P103 of placing the magnetic marker before magnetization on the road and a magnetizing process P106 of magnetizing the magnetic marker placed on the road by acting on the magnetic marker with a magnetic field are performed.

Abstract: A magnetic field measurement device capable of accurate measurement of a magnetic field even after a sensitivity of an MI sensor varies is provided. A magnetic field measurement device (1) includes an MI sensor (2) and a sensitivity calculation means (3). The MI sensor (2) includes a magneto-sensitive body (20), a detection coil (21) and a magnetic field generation coil (22) that generates a magnetic field upon energization. The sensitivity calculation means (3) varies a current flowing in the magnetic field generation coil (22) in a state where an outside-sensor magnetic field HO acting on the magneto-sensitive body (20) from outside the MI sensor (2) is constant. Consequently, the magnetic field acting on the magneto-sensitive body (20) is varied to calculate a sensitivity a by dividing a variation in an output voltage of the detection coil (21) by a variation in the magnetic field acting on the magneto-sensitive body (20).

Abstract: Provided are a magnetic marker and a magnetic marker detection system with a reduced magnetic force. The magnetic marker detection system (1S) in which magnetism generated from the magnetic marker (1) laid on a road surface (53) is detected by a magnetic sensor (2) attached to a vehicle's body floor (50) of a vehicle (5) is a system with the magnetic marker (1) and the magnetic sensor (2) in combination, the magnetic marker having a surface with a magnetic flux density equal to or smaller than 40 mT and the magnetic sensor using a magneto-impedance element including an amorphous wire as a magneto-sensitive body with impedance in a high-frequency region changing in accordance with an external magnetic field.

Abstract: Provided are a magnetic marker and a magnetic marker detection system with a reduced magnetic force. The magnetic marker detection system (1S) in which magnetism generated from the magnetic marker (1) laid on a road surface (53) is detected by a magnetic sensor (2) attached to a vehicle's body floor (50) of a vehicle (5) is a system with the magnetic marker (1) and the magnetic sensor (2) in combination, the magnetic marker having a magnetism reach ratio Gh/Gs, which is a ratio of a magnetic flux density Gh at a position at a height of 250 mm with respect to a magnetic flux density Gs of a surface, being equal to or larger than 0.5% and the magnetic sensor using a magneto-impedance element including a magneto-sensitive body with impedance changing in accordance with an external magnetic field.

Abstract: Provided is a magnetic marker detection method with high detection reliability. The magnetic marker detection method for detecting a magnetic marker (10) laid on a road while a vehicle (5) having a plurality of, at least two or more, magnetic sensors attached thereto is travelling includes a gradient generating process of generating a first magnetic gradient, which is a difference between magnetic measurement values of two magnetic sensors and a filter processing process of generating a filter output value by performing filter processing by a high-pass filter as to a change of the first magnetic gradient in a travelling direction of the vehicle. The magnetic marker (10) is detected by an arithmetic operation process regarding the filter output value.

Abstract: A reduced size/thickness magnetic detection device includes: a substrate; and a magneto-impedance element at one substrate surface side and including a magneto-sensitive wire and a detection coil. The wire senses an external magnetic field component in a first axis direction in which the wire extends. The coil loops around the wire, and includes left-side and right-side coil parts coexisting along the wire, and a magnetic field direction changing body of soft magnetic material having at least a part at another substrate surface side or in the substrate above an intermediate position between left-side and right-side coil parts. The body can change an external magnetic field component in a third axis direction intersecting the substrate to a measurement magnetic field component in the first axis direction. The external magnetic field component in the third axis direction can be detected from a left-side coil part output and a right-side coil part output.

Abstract: A magnetic detection device that is reduced in size and thickness, but also accurate, includes a substrate and an element disposed on the substrate and including a magneto-sensitive wire sensing an external magnetic field component in an extending direction and a detection coil looping around the magneto-sensitive wire. The magnetic detection device further includes a magnetic field deflector deflecting an external magnetic field around the magneto-sensitive wire, and having a nonmagnetic material core part and a soft magnetic material shell part covering an outer side of at least part of the core part. The magnetic field deflector has a hollow, rather than solid, structure of soft magnetic material. The soft magnetic material volume is therefore significantly smaller, and the hysteresis caused in the magnetic field deflector is remarkably reduced. With the magnetic detection device, the magnetic field component orthogonal to the substrate is also detected with higher accuracy.

Abstract: A magnetic field measurement device capable of accurate measurement of a magnetic field even after a sensitivity of an MI sensor varies is provided. A magnetic field measurement device (1) includes an MI sensor (2) and a sensitivity calculation means (3). The MI sensor (2) includes a magneto-sensitive body (20), a detection coil (21) and a magnetic field generation coil (22) that generates a magnetic field upon energization. The sensitivity calculation means (3) varies a current flowing in the magnetic field generation coil (22) in a state where an outside-sensor magnetic field HO acting on the magneto-sensitive body (20) from outside the MI sensor (2) is constant. Consequently, the magnetic field acting on the magneto-sensitive body (20) is varied to calculate a sensitivity a by dividing a variation in an output voltage of the detection coil (21) by a variation in the magnetic field acting on the magneto-sensitive body (20).

Abstract: A reduced size/thickness magnetic detection device includes: a substrate; and a magneto-impedance element at one substrate surface side and including a magneto-sensitive wire and a detection coil. The wire senses an external magnetic field component in a first axis direction in which the wire extends. The coil loops around the wire, and includes left-side and right-side coil parts coexisting along the wire, and a magnetic field direction changing body of soft magnetic material having at least a part at another substrate surface side or in the substrate above an intermediate position between left-side and right-side coil parts. The body can change an external magnetic field component in a third axis direction intersecting the substrate to a measurement magnetic field component in the first axis direction. The external magnetic field component in the third axis direction can be detected from a left-side coil part output and a right-side coil part output.

Abstract: An attitude detection sensor includes three magnetic sensing parts that detect magnetic field strength in respective directions along three axes perpendicular to each other, and two tilt sensing parts that detect tilt angles around two axes perpendicular to each other. The tilt sensing parts each include a cantilever having a magnet body that moves in accordance with the tilt angle, and a magnetic detection head that detects a displacement of the magnet body. The three magnetic sensing parts and the two magnetic detection heads are each formed using a magnetic detection element of the same type. At least one electronic circuit for controlling the five magnetic detection elements, the three magnetic sensing parts, and the two tilt sensing parts is disposed in a single package in the form of a module.

Abstract: An attitude detection sensor includes three magnetic sensing parts that detect magnetic field strength in respective directions along three axes perpendicular to each other, and two tilt sensing parts that detect tilt angles around two axes perpendicular to each other. The tilt sensing parts each include a cantilever having a magnet body that moves in accordance with the tilt angle, and a magnetic detection head that detects a displacement of the magnet body. The three magnetic sensing parts and the two magnetic detection heads are each formed using a magnetic detection element of the same type. At least one electronic circuit for controlling the five magnetic detection elements, the three magnetic sensing parts, and the two tilt sensing parts is disposed in a single package in the form of a module.

Abstract: The present invention is a magnetic field detection device that makes use of a frequency characteristic affording circuit in order to selectively detect magnetic signals from a frequency domain accurately at a high level of sensitivity. The present invention has a magneto-impedance element, a detector coil and a negative feedback coil which is wound around the magneto-impedance element, and a frequency characteristic affording circuit which affords a frequency characteristics on the negative feedback signal of a negative feedback connecting an output terminal thereof with the negative feedback coil. Using filters as the frequency characteristic affording circuit, the following are possible uses of this magnetic field detection device: a geomagnet detection device for earthquake prediction (using a high-pass filter), a bill validation apparatus for vending machines, etc. (using a low-pass filter), and a magnetic oscillation detection device for a magnetic gate system (using a band-reject filter).

Abstract: The present invention is a magnetic field detection device that makes use of a frequency characteristic affording circuit in order to selectively detect magnetic signals from a frequency domain accurately at a high level of sensitivity. The present invention has a magneto-impedance element, a detector coil and a negative feedback coil which is wound around the magneto-impedance element, and a frequency characteristic affording circuit which affords a frequency characteristics on the negative feedback signal of a negative feedback connecting an output terminal thereof with the negative feedback coil. Using filters as the frequency characteristic affording circuit, the following are possible uses of this magnetic field detection device: a geomagnet detection device for earthquake prediction (using a high-pass filter), a bill validation apparatus for vending machines, etc. (using a low-pass filter), and a magnetic oscillation detection device for a magnetic gate system (using a band-reject filter).