Optical encoder

This optical encoder is provided with: an optical scale, which has optical patterns at regular intervals, and which can be relatively angularly displaced; a floodlight unit for projecting light toward the optical scale; a light receiving unit for receiving light from the optical scale; and a calculating unit for calculating an absolute rotation angle (Theta) of the optical scale on the basis of signals transmitted from the light receiving unit. The optical patterns include a plurality of light blocking sections and a plurality of light transmitting sections, which are alternately disposed, and when the pitch of an nth light blocking section in the predetermined circumferential direction is represented by (Pn), and the width of the nth light blocking section is represented by (Wn), a transmissivity (Theta n) that corresponds to an angle ( Theta n) of the nth light blocking section, and the pitch (Pn) of the light blocking section satisfy a predetermined formula, and the width (Wn) of the ...

Rotation number detector

A rotation number detector according to an embodiment is a rotation number detector that detects the number of rotations of a magnet attached to a rotating body by using a power generation unit. The power generation unit includes N (N is a natural number equal to or larger than 1) power generation elements, each including a magnetic wire in which magnetization reversal occurs due to a large Barkhausen effect and a pickup coil that is wound around the magnetic wire. The magnetic wire is longer than a wound portion of the pickup coil in an extension direction of the magnetic wire of the power generation elements. The magnetic wire is set above a rotation center of the magnet.

Magnetic substance detection device

A magnetic substance detection device according to the present invention is provided with a magnetoresistive sensor disposed in the middle of a movement path of a magnetic substance, a lower magnet the south pole and north pole of which are arranged along the direction of movement of the magnetic substance, and an upper magnet the north pole and south pole of which are arranged along the direction of movement of the magnetic substance. The lower magnet and the upper magnet are disposed such that the south pole of the lower magnet and the north pole of the upper magnet face each other and the north pole of the lower magnet and the south pole of the upper magnet face each other with the movement path of the magnetic substance therebetween. The magnetic substance can be detected with high accuracy by this configuration.

Position detection device

To obtain a position detection device capable of detecting highly accurate and robust position by suppressing affect of error detection of an edge, provided is a configuration for performing a validity determination of edges detected by binarizing an image signal ( 21 ) converted by a light-receiving element ( 3 ) for receiving light irradiated from a light source ( 1 ) toward a scale ( 2 ) having a code pattern, and performing position detection after removing the edges determined to be invalid as edges that have been affected by foreign matter and the like among the edges on which the validity determination has been performed.

Absolute encoder

Provided is an absolute encoder capable of detecting the absolute angle at high resolution and with high precision. An image sensor receives light in an absolute value code pattern of a scale, an edge detecting unit detects from the received light signal an edge pixel position and an edge direction, and an edge position correcting unit corrects the edge pixel position based on the edge direction. A phase detecting unit detects from the corrected edge pixel position the phase shift amount of a shift from a reference pixel position of the image sensor, and a high precision detection unit uses a rough absolute position detected by a rough detection unit and the phase shift amount detected by the phase detecting unit to detect the absolute position with high precision.

Magnetic rotation-angle detector

Provided is a magnetic rotation-angle detector that includes a disk-shaped magnet that is magnetized so as to change magnetic poles n times per rotation (where n is an integer equal to or larger than 1); a magnetic-body slit plate that is rotated together with the magnet, where a part having a high magnetic flux permeability and a part having a low magnetic flux permeability are alternately and repeatedly arranged thereon so as to change the magnetic flux permeability m times per rotation (where m is an integer equal to or larger than 2 and m>n); a magnetic sensor that detects magnetism from the magnet when the magnet has passed by through the magnetic-body slit plate; and a calculation unit that obtains the rotation angle of the magnet from the output from the magnetic sensor.

Magnetic sensor device

A first magnet (6) and a second magnet (7) arranged so that the opposite poles thereof face one another are provided in a wall surface of a hollow section (2) through which paper currency (5) is transported, and thereby form a gradient magnetic field including a zero point both in a magnetic field component in the direction in which the poles face one another between the magnets, and in a magnetic field component in the direction of transport of the paper currency (5) within the hollow section (2). An AMR element (10) is provided between the paper currency (5) and the first magnet (6). The AMR element (10) is enclosed in a multilayer substrate and is clad with a resin. The AMR element (10) is provided in a region of low magnetic field strength near where the magnetic field strength of the gradient magnetic field reaches the zero point in the transport direction. The paper currency (5) passes through a region of high magnetic field strength in the gradient magnetic field.

Rotation detection device and method of manufacturing rotation detection device

A magnet for detection mounted on a rotating shaft rotating about a rotation axis, and a detector disposed opposite to the magnet for detection to detect rotation of the rotating shaft are included. The detector includes a multi-layer circuit board, a recessed groove that is provided in an interlayer of the circuit board, has a center on an extension of the rotation axis, and is orthogonal to the rotation axis, a combined magnetic wire incorporated in the recessed groove and exhibiting a large Barkhausen effect, and a pickup coil formed of wiring conductors on the circuit board and a conductor with which through holes are filled, to surround the combined magnetic wire.

Magnetic encoder

To provide a magnetic encoder in which a base material has a ring-shaped body portion into which a rotation axis is inserted when a magnetic drum is mounted on a rotation axis, and an engagement convex portion provided so as to project over a whole circumference of an outer periphery of the body portion. The body portion has a centering track provided in a part of the outer periphery of the body portion over the whole circumference as a reference of circular runout tolerance on an outer periphery of a magnet. The engagement convex portion has a constricted portion projecting from the outer periphery of the body portion, and a cylindrical portion extending in an axial direction of the body portion from a tip end of the constricted portion. The magnet surrounds the engagement convex portion so as to wrap around to a gap between the cylindrical portion and the body portion, and exposes the centering track without covering the centering track.

Rotation angle detection device

A rotation angle detection device detects the rotation angle of a rotary drum having a multipole magnetic pattern with a magnetization pitch (lambda) at the outer periphery thereof and is provided with a detection track for detecting the multipole magnetic pattern. The detection track comprises: a first detection element group which has a plurality of first magnetoresistance elements disposed at intervals of lambda/(2n) where n is the order of a high-frequency component to be eliminated among a plurality of high-frequency components superimposed on a fundamental wave component of a detection signal of the multipole magnetic pattern, and is disposed between a first reference potential and an output terminal; a second detection element group which has a plurality of second magnetoresistance elements disposed at intervals of lambda/(2n) and is disposed between the output terminal and a second reference potential; a plurality of first dummy magnetoresistance elements which are disposed between ...

MAGNETIC SENSOR DEVICE

By providing a first magnet and a second magnet on wall surfaces of a hollow section where paper money is conveyed such that different magnetic poles face each other, a gradient magnetic field is formed wherein both a magnetic field component in an opposing direction to the magnets and a magnetic field component in a conveyance direction of the paper money include a zero point. An AMR element is provided between the paper money and the first magnet. The AMR element is enclosed by a multi-layered substrate and covered with resin. The AMR element is provided in an area where the magnetic field intensity is weak, which is where the magnetic field intensity in the gradient magnetic field in the conveyance direction is near zero. The paper money passes through an area where the magnetic field intensity of the gradient magnetic field is strong. 4. The magnetic sensor device according to claim 1 , further comprising resin that covers the magnetoresistive element and electrical connection means so as not protrude from the surface of the substrate.5. The magnetic sensor device according to claim 1 , whereinthe magnetoresistive element is such that a first rectangular-shaped resistor pattern and a second rectangular-shaped resistor pattern that are orthogonal to the conveyance direction are connected in series, andthe connection point between the first rectangular-shaped resistor pattern and the second rectangular-shaped resistor pattern that are connected in series is connected to the output terminal.6. The magnetic sensor device according to claim 5 , whereinthe first resistor pattern is arranged such that the long side of the rectangular shape extends in a direction that is orthogonal to conveyance direction, andthe second resistor pattern is arranged such that the long side of the rectangular shape extends in the conveyance direction.7. The magnetic sensor device according to claim 5 , whereinthe first resistor pattern and the second resistor pattern both have a ...

MAGNETIC SUBSTANCE DETECTION DEVICE

The invention is related to a magnetic substance detection device for detecting a magnetic substance, including: a magnetoresistive sensor arranged in the middle of a movement path of the magnetic substance; and a lower magnet in which a south pole and a north pole are arrayed along the movement direction of the magnetic substance; and a upper magnet in which a north pole and a south pole are arrayed along the movement direction of the magnetic substance. The lower and upper magnets are arranged with the movement path of the magnetic substance interposed so that the south pole of the lower magnet and the north pole of the upper magnet are opposed to each other, and the north pole of the lower magnet and the south pole of the upper magnet are opposed to each other, whereby the magnetic substance can be detected with high accuracy. 116-. (canceled)17. A magnetic substance detection device for detecting a magnetic substance , comprising:a magnetoresistive sensor arranged in the middle of a movement path of the magnetic substance; anda first bias magnet in which the first magnetic pole and the second magnetic pole having reverse polarity to the first magnetic pole are arrayed along a movement direction of the magnetic substance; anda second bias magnet in which the second magnetic pole and the first magnetic pole are arrayed along the movement direction of the magnetic substance;wherein the first bias magnet and the second bias magnet are arranged with the movement path of the magnetic substance interposed so that the first magnetic pole of the first bias magnet and the second magnetic pole of the second bias magnet are opposed to each other so as to sandwich the magnetoresistive sensor and the magnetic substance to be detected, and so that the second magnetic pole of the first bias magnet and the first magnetic pole of the second bias magnet are opposed to each other, thereby applying the bias magnetic field along the movement direction of the magnetic substance to the ...

ROTATION-ANGLE DETECTION DEVICE

A detection track includes a first detection element group that includes a plurality of first magnetic resistance elements arranged at a pitch λ/(2n) when an order to cancel target harmonic components among a plurality of harmonic components superimposed on a fundamental component of a detection signal for multi-pole magnetic pattern is assumed as n, and a second detection element group that includes a plurality of second magnetic resistance elements arranged at the pitch λ/(2n), a plurality of first dummy magnetic resistance elements arranged among the first magnetic resistance elements, and a plurality of second dummy magnetic resistance elements arranged among the second magnetic resistance elements. Pitches between adjacent magnetic resistance elements among the first magnetic resistance elements and the first dummy magnetic resistance element are equivalent to one another, and pitches between adjacent magnetic resistance elements among the second magnetic resistance elements and the second dummy magnetic resistance element are equivalent to one another. 17-. (canceled)8. A rotation-angle detection device for detecting a rotation angle of a rotary drum having a multi-pole magnetic pattern at a magnetization pitch λon an outer circumference , the rotation-angle detection device comprising a detection track that detects the multi-pole magnetic pattern , whereinthe detection track includes{'b': '2', 'sub': 1', 'k', '1', 'k, 'a first detection element group that includes a plurality of first magnetic resistance elements, when k is an integer equivalent to or larger than and orders of the target harmonic components to cancel among a plurality of harmonic components superimposed on a fundamental component of a detection signal for the multi-pole magnetic pattern are assumed as n=n, . . . , and n, respectively, the first magnetic resistance elements being arranged at a pitch λ/(2n) for each of orders n=n, . . . , and nto cancel target harmonic components, and'}a ...

Optical encoder

An optical encoder includes: an optical scale having periodical optical patterns and can be relatively and angularly displaced; a projector for irradiating the optical scale with light; a light receiver for receiving light from the optical scale; and a calculator for calculating an absolute rotation angle θ of the optical scale in accordance with a signal from the light receiver. The optical patterns include a plurality of light shielding portions and a plurality of light transmitting portions, each of the portions being located alternately. When a pitch of an n-th light shielding portion in a predetermined circumferential direction is denoted by Pn and a width of the n-th light shielding portion is denoted by Wn, a transmissivity T(θn) corresponding to an angle θn of the n-th light shielding portion and the pitch Pn of the light shielding portion satisfy predetermined equations, and the width Wn of the light shielding portion in the optical pattern varies in accordance with a function of the pitch Pn of the light shielding portion.

MAGNETIC SENSOR DEVICE

A magnetic sensor device includes a first magnet and a second magnet that are disposed on mutually opposing sides of a conveyance path, and one of poles of the first magnet faces an opposite pole of the second magnet. The first magnet and the second magnet generate a cross magnetic field whose strength in a spacing direction, which is orthogonal to a conveying direction, is within a predetermined range. An AMR element is located in a magnetic field in which the strength of the cross magnetic field in the spacing direction is within a predetermined range, and detects, as change in a resistance value, change in the cross magnetic field caused by an object to be detected. A multilayer board outputs the change in the resistance value detected by the AMR element to a processing circuit. 1. A magnetic sensor device comprising:a conveyance path for conveying an object to be detected having a magnetic pattern;a magnetic field generator comprising a pair of magnets that are located on mutually opposing sides of the conveyance path, or a magnet and a magnetic body that are located on mutually opposing sides of the conveyance path, the magnetic field generator generating a cross magnetic field whose magnetic field strength in a spacing direction is within a predetermined range, the spacing direction being a direction orthogonal to the conveying direction of the object to be detected in the conveyance path and being a direction that vertically passes through the magnetic pattern;a magnetoresistance effect element located between the magnet or the magnetic body and the conveyance path in the cross magnetic field, the magnetoresistance effect element detecting, as change in the resistance value, change in a component of the conveying direction in the cross magnetic field, the change being caused by the magnetic pattern of the object to be detected; andan outputter connected to the magnetoresistance effect element, the outputter outputting the change in the resistance value ...

MULTI-ROTATION ENCODER

A battery-less multi-rotation encoder including detection coils with the Barkhausen effect includes a rotation detection mechanism and a signal processing circuit. The detection coils generate voltage pulses with different positive and negative signs, and transmit them to the signal processing circuit, and the signal processing circuit includes a controller and an adder. The controller can set states of the detection coils to be High or Low and to maintain them at High or Low, based on the positive and negative signs of the respective voltage pulses and no voltage pulse being generated therefrom. The controller is configured to store the states of the respective detection coils in a memory. The adder can update a number of rotations according to the changes in the states of the respective detection coils. The signal processing circuit can determine the rotational angle of a rotational shaft within about 1/4 rotation unit. 1. A battery-less multi-rotation encoder adapted to detect and hold a rotational direction of a rotational shaft and a number of rotations of the rotational shaft without being supplied with electric power from outside , the battery-less multi-rotation encoder comprising:a rotational detection mechanism including a magnet configured to rotate together with the rotational shaft and have N magnetic poles in a circumferential direction of the rotational shaft, and L detection coils configured to have a magnetic wire with the Barkhausen effect with respect to a magnetic field from the magnet and be placed such that their phase angles are deviated from each other on a rotational circumference of the magnet, L being equal to or more than 2; anda signal processing circuit electrically connected to the rotation detection mechanism,the signal processing circuit including:a non-volatile memory circuit adapted to hold a state of the respective detection coils and the number of rotations of the rotational shaft; anda circuit configured to determine a current ...

Magnetic encoder

To provide a magnetic encoder in which a base material has a ring-shaped body portion into which a rotation axis is inserted when a magnetic drum is mounted on a rotation axis, and an engagement convex portion provided so as to project over a whole circumference of an outer periphery of the body portion. The body portion has a centering track provided in a part of the outer periphery of the body portion over the whole circumference as a reference of circular runout tolerance on an outer periphery of a magnet. The engagement convex portion has a constricted portion projecting from the outer periphery of the body portion, and a cylindrical portion extending in an axial direction of the body portion from a tip end of the constricted portion. The magnet surrounds the engagement convex portion so as to wrap around to a gap between the cylindrical portion and the body portion, and exposes the centering track without covering the centering track.

MAGNETIC ROTATION-ANGLE DETECTOR

Provided is a magnetic rotation-angle detector that includes a disk-shaped magnet that is magnetized so as to change magnetic poles n times per rotation (where n is an integer equal to or larger than 1); a magnetic-body slit plate that is rotated together with the magnet, where a part having a high magnetic flux permeability and a part having a low magnetic flux permeability are alternately and repeatedly arranged thereon so as to change the magnetic flux permeability m times per rotation (where m is an integer equal to or larger than 2 and m>n); a magnetic sensor that detects magnetism from the magnet when the magnet has passed by through the magnetic-body slit plate; and a calculation unit that obtains the rotation angle of the magnet from the output from the magnetic sensor. 1. A magnetic rotation-angle detector comprising:a disk-shaped magnet that is magnetized so as to change magnetic poles n times per rotation (where n is an integer equal to or larger than 1);a unit that generates a magnetic field change in which a rotation period of m and a rotation period of n are superimposed per rotation of the unit by incorporations a magnetic-body slit plate that is rotated together with the magnet, the magnetic-body slit plate being provided with a part having a high magnetic flux permeability and a part having a low magnetic flux permeability that are alternately and repeatedly arranged thereon, so as to change the magnetic flux permeability m times per rotation (where m is an integer equal to or larger than 2, and m>n);a magnetic sensor in which magnetic detection elements are arranged with a space of π/m [rad] or π/n [rad] therebetween and that separates and takes a signal of the rotation period of m or the rotation period of n from the magnetic field change in which the rotation period of m and the rotation period of n are superimposed; anda calculation unit that separates a signal component having a frequency of n and a signal component having a frequency of m from ...

Absolute encoder

Provided is an absolute encoder capable of detecting the absolute angle at high resolution and with high precision. An image sensor receives light in an absolute value code pattern of a scale, an edge detecting unit detects from the received light signal an edge pixel position and an edge direction, and an edge position correcting unit corrects the edge pixel position based on the edge direction. A phase detecting unit detects from the corrected edge pixel position the phase shift amount of a shift from a reference pixel position of the image sensor, and a high precision detection unit uses a rough absolute position detected by a rough detection unit and the phase shift amount detected by the phase detecting unit to detect the absolute position with high precision.

Position detection device

To obtain a position detection device capable of detecting highly accurate and robust position by suppressing affect of error detection of an edge, provided is a configuration for performing a validity determination of edges detected by binarizing an image signal ( 21 ) converted by a light-receiving element ( 3 ) for receiving light irradiated from a light source ( 1 ) toward a scale ( 2 ) having a code pattern, and performing position detection after removing the edges determined to be invalid as edges that have been affected by foreign matter and the like among the edges on which the validity determination has been performed.

Encoder

An encoder includes a magnetic sensor having higher detection sensitivity to a magnetic field applied in a reading direction, while having lower detection sensitivity to a magnetic field applied in a direction forming a greater angle with respect to the reading direction, an encoder substrate having the magnetic sensor mounted thereon, a magnetic shield to shield against a magnetic field including a side portion covering sides of the magnetic sensor and a top-side portion covering a top of the magnetic sensor, a permanent magnet located to face the encoder substrate, a shaft having the permanent magnet attached to a tip end of the shaft, and a bracket to support the shaft in a rotatable manner, wherein on the side portion of the magnetic shield, a notch as a connector insertion portion is located not to overlap an extended area of the magnetic sensor in the reading direction.

ROTATION DETECTION DEVICE AND METHOD OF MANUFACTURING ROTATION DETECTION DEVICE

A magnet for detection mounted on a rotating shaft rotating about a rotation axis, and a detector disposed opposite to the magnet for detection to detect rotation of the rotating shaft are included. The detector includes a multi-layer circuit board, a recessed groove that is provided in an interlayer of the circuit board, has a center on an extension of the rotation axis, and is orthogonal to the rotation axis, a combined magnetic wire incorporated in the recessed groove and exhibiting a large Barkhausen effect, and a pickup coil formed of wiring conductors on the circuit board and a conductor with which through holes are filled, to surround the combined magnetic wire. 113.-. (canceled)14. A rotation detection device comprising:a magnet for detection mounted on a rotating body rotating about a rotation axis; anda detector including a multi-layer circuit board disposed opposite to the magnet for detection, to detect rotation of the rotating body, [{'b': '320', 'a combined magnetic wire provided at an interlayer () of the circuit board, disposed on an extension of the rotation axis and exhibiting a large Barkhausen effect; and'}, 'a pickup coil including wirings on the circuit board and a conductor with which through holes provided in the circuit board are filled, to surround the combined magnetic wire., 'the detector comprising15. The rotation detection device according to claim 14 , wherein the detector comprising a groove provided in the interlayer of the circuit board claim 14 , having a center on the extension of the rotation axis claim 14 , and being orthogonal to the rotation axis claim 14 , andthe pickup coil is disposed around the groove.16. The rotation detection device according to claim 15 , wherein the pickup coil comprises:an inner layer coil formed of wirings on the circuit board and a conductor with which through holes are filled, and surrounding the combined magnetic wire; andan outer layer coil formed of wirings on the circuit board and a conductor ...

ROTATION NUMBER DETECTOR

A rotation number detector according to an embodiment is a rotation number detector that detects the number of rotations of a magnet attached to a rotating body by using a power generation unit. The power generation unit includes N (N is a natural number equal to or larger than 1) power generation elements, each including a magnetic wire in which magnetization reversal occurs due to a large Barkhausen effect and a pickup coil that is wound around the magnetic wire. The magnetic wire is longer than a wound portion of the pickup coil in an extension direction of the magnetic wire of the power generation elements. The magnetic wire is set above a rotation center of the magnet. 1. A rotation number detector that detects a number of rotations of a magnet attached to a rotating body by using a power generation unit , whereinthe power generation unit includes N (N is a natural number equal to or larger than 1) power generation elements, each including a magnetic wire, in which magnetization reversal occurs due to a large Barkhausen effect, and a pickup coil that is wound around the magnetic wire,the magnetic wire is longer than a wound portion of the pickup coil in an extension direction of the magnetic wire of the power generation elements, that are separated from each other by a distance larger than an outer diameter of the pickup coil and', 'that are connected in series to each other, and, 'the pickup coil provided in each of the power generation elements has two wound portions'}the magnetic wire is provided above a rotation center of the magnet.2. The rotation number detector according to claim 1 , wherein{'b': '2', 'N is a natural number equal to or larger than , and'}portions of each of the magnetic wires about which the pickup coils of the N power generation elements are not wound overlap with each other above the rotation center.3. A rotation number detector that detects a number of rotations of a magnet attached to a rotating body by using a power generation unit ...

Magnetic substance detection device

The invention is related to a magnetic substance detection device for detecting a magnetic substance, including: a magnetoresistive sensor arranged in the middle of a movement path of the magnetic substance; and a lower magnet in which a south pole and a north pole are arrayed along the movement direction of the magnetic substance; and a upper magnet in which a north pole and a south pole are arrayed along the movement direction of the magnetic substance. The lower and upper magnets are arranged with the movement path of the magnetic substance interposed so that the south pole of the lower magnet and the north pole of the upper magnet are opposed to each other, and the north pole of the lower magnet and the south pole of the upper magnet are opposed to each other, whereby the magnetic substance can be detected with high accuracy.

Magnetic sensor device

By providing a first magnet and a second magnet on wall surfaces of a hollow section where paper money is conveyed such that different magnetic poles face each other, a gradient magnetic field is formed wherein both a magnetic field component in an opposing direction to the magnets and a magnetic field component in a conveyance direction of the paper money include a zero point. An AMR element is provided between the paper money and the first magnet. The AMR element is enclosed by a multi-layered substrate and covered with resin. The AMR element is provided in an area where the magnetic field intensity is weak, which is where the magnetic field intensity in the gradient magnetic field in the conveyance direction is near zero. The paper money passes through an area where the magnetic field intensity of the gradient magnetic field is strong.

Rotation-angle detection device

A detection track includes a first detection element group that includes a plurality of first magnetic resistance elements arranged at a pitch λ/(2n) when an order to cancel target harmonic components among a plurality of harmonic components superimposed on a fundamental component of a detection signal for multi-pole magnetic pattern is assumed as n, and a second detection element group that includes a plurality of second magnetic resistance elements arranged at the pitch λ/(2n), a plurality of first dummy magnetic resistance elements arranged among the first magnetic resistance elements, and a plurality of second dummy magnetic resistance elements arranged among the second magnetic resistance elements. Pitches between adjacent magnetic resistance elements among the first magnetic resistance elements and the first dummy magnetic resistance element are equivalent to one another, and pitches between adjacent magnetic resistance elements among the second magnetic resistance elements and the second dummy magnetic resistance element are equivalent to one another.

Magnetic linear position detector

Ein magnetischer Linear-Positions-Detektor (20) umfasst einen Stator (1) und einen Läufer (2), der in Bezug auf den Stator (1) entlang einer ersten Richtung beweglich ist. Der Stator (1) oder der Läufer (2) umfasst einen Magnetdetektor (3), und der andere von dem Stator (1) und dem Läufer (2) umfasst einen Magneten (4). Der Magnet (4) weist eine erste Oberfläche auf, die dem Magnetdetektor (3) zugewandt ist, und die erste Oberfläche ist entlang der ersten Richtung abwechselnd mit N-Polen und S-Polen versehen. Der Magnet (4) umfasst einen ersten Bereich (11) und einen zweiten Bereich (12), der entlang der ersten Richtung auf jeder Seite des ersten Bereichs (11) vorgesehen ist. Im ersten Bereich (11) ist eine Länge entlang einer zur ersten Oberfläche senkrechten zweiten Richtung konstant. Im zweiten Bereich (12) unterscheidet sich eine Länge entlang der zweiten Richtung von der Länge im ersten Bereich (11). A magnetic linear position detector (20) comprises a stator (1) and a mover (2) movable along a first direction with respect to the stator (1). The stator (1) or the mover (2) includes a magnetic detector (3), and the other of the stator (1) and the mover (2) includes a magnet (4). The magnet (4) has a first surface facing the magnetic detector (3), and the first surface is alternately provided with N poles and S poles along the first direction. The magnet (4) comprises a first portion (11) and a second portion (12) provided along the first direction on either side of the first portion (11). In the first region (11), a length is constant along a second direction perpendicular to the first surface. In the second area (12), a length along the second direction differs from the length in the first area (11).

Magnetic rotational-angle detector

The present invention provides a magnetic rotational-angle detector capable of detecting a position and a rotational angle of a rotating member with excellent accuracy. The magnetic rotational-angle detector includes device arrays ( 51, 52 ) constituted by a plurality of magnetic sensor devices which are arranged to cancel the n-th order harmonic components by each other. In the device arrays, the magnetic sensor devices corresponding to each other are arranged such that they are spaced apart with a distance of (2m+1)λ, and the arrangement of all the magnetic sensor devices and their orientations with respect to a power-supply terminal and a ground terminal are axisymmetrical about a straight line ( 2 b ) passing through a barycenric position ( 59 ) of all the magnetic sensor devices which is positioned on a straight line along a radial direction of a rotating drum ( 1 ).

Magnetic rotation angle detector

Power generation element, magnetic sensor, encoder, and motor

A power generation element includes a magnetic member that produces a large Barkhausen effect and magnetism collection members including an insertion part having the magnetic member inserted therethrough. The magnetism collection member includes a first component on an opposite side of a boundary plane to a magnetic field generation unit and a second component on the same side of the boundary plane as the magnetic field generation unit, the boundary plane passing through a center of an imaginary circle inscribed in the insertion part and having a diameter equal to a length of the insertion part in a third direction perpendicular to first and second directions, the first direction is a direction of the insertion of the magnetic member, and the second direction is a direction in which the magnetic field generation unit is disposed. A volume of the second component is larger than a volume of the first component.

Magnetic linear position detector

A magnetic linear position detector includes a stator and a mover that is movable along a first direction with respect to the stator. One of the stator and the mover includes a magnetic detector, and the other of the stator and the mover includes a magnet. The magnet has a first face facing the magnetic detector, and the first face is provided alternately with N poles and S poles along the first direction. The magnet includes a first region and a second region provided on each side of the first region along the first direction. In the first region, a length along a second direction perpendicular to the first face is constant. In the second region, a length along the second direction is different from the length in the first region.

Power generation element, magnetic sensor, encoder, and motor

A power generation element includes a magnetic member that produces a large Barkhausen effect and magnetism collection members including an insertion part having the magnetic member inserted therethrough. The magnetism collection member includes a first component on an opposite side of a boundary plane to a magnetic field generation unit and a second component on the same side of the boundary plane as the magnetic field generation unit, the boundary plane passing through a center of an imaginary circle inscribed in the insertion part and having a diameter equal to a length of the insertion part in a third direction perpendicular to first and second directions, the first direction is a direction of the insertion of the magnetic member, and the second direction is a direction in which the magnetic field generation unit is disposed. A volume of the second component is larger than a volume of the first component.

Positionsdetektor und Lineartransport-Vorrichtung

Ein Positionsdetektor (5) umfasst eine Positionsdetektier-Magneteinheit (12), die an jedem von mehreren mit einem Läufer ausgestatteten Tragelementen installiert ist, und eine Positionsdetektier-Einheit (22), die an einer mit einem Stator versehenen Transportschiene installiert ist. Die Positionsdetektier-Magneteinheit (12) umfasst mehrere Magnete (121), die so angeordnet sind, dass in einer Transportrichtung der Tragelemente unterschiedliche Magnetpole abwechselnd angeordnet sind, und seitliche Magnetabschirmabschnitte (122), die in der Transportrichtung der Tragelemente an Enden der Positionsdetektier-Magneteinheit (12) installiert sind. Die Positionsdetektier-Einheit (22) umfasst: ein parallel zu der Transportrichtung der Tragelemente angeordnetes Arbeitssubstrat (222); mehrere Magnetfühler (221) in der Transportrichtung der Tragelemente, die Seite an Seite auf einer Vorderseite des Arbeitssubstrats (222) angeordnet sind, wobei die Vorderseite eine den Tragelementen zugewandte Oberfläche ist; und einen den Magnetfühlern gegenüberliegenden substratseitigen Magnetabschirmabschnitt (223), wobei der substratseitige Magnetabschirmabschnitt auf einer Rückseite des Arbeitssubstrates (222) installiert ist, wobei die Rückseite eine Oberfläche ist, die der den Tragelementen zugewandten Vorderseite gegenüberliegt.

Energieerzeugungselement, Magnetsensor, Wertgeber und Motor

Ein Energieerzeugungselement umfasst: ein magnetisches Teil, das aus einem magnetischen Material gefertigt ist, das einen großen Barkhausen-Effekt erzeugt; eine Energieerzeugungsspule, die an einen magnetischen Fluss koppelt, der durch das magnetische Teil verläuft; und zwei Magnetismussammelteile, die ein weichmagnetisches Material enthalten und jeweils einen Einfügebereich aufweisen, durch den das magnetische Teil eingefügt ist, wobei die Magnetismussammelteile an entgegengesetzten Endbereichen des magnetischen Teils vorgesehen sind und das magnetische Teil berühren, wobei das magnetische Teil durch den Einfügebereich eingefügt ist. Das Magnetismussammelteil umfasst eine erste Komponente auf einer Seite einer Grenzebene, die einer Magnetfelderzeugungseinheit gegenüberliegt, und eine zweite Komponente auf der gleichen Seite der Grenzebene wie die Magnetfelderzeugungseinheit aufweist, wobei die Grenzebene als eine gedachte Ebene definiert ist, die durch ein Zentrum eines gedachten eingeschriebenen Kreises verläuft, wobei der gedachte eingeschriebene Kreis in den Einfügebereich eingeschrieben ist und einen Durchmesser aufweist, der gleich einer Länge des Einfügebereichs in einer dritten Richtung ist, die eine Richtung senkrecht sowohl zu einer ersten Richtung als auch zu einer zweiten Richtung ist, wobei die gedachte Ebene parallel zu einer gedachten Ebene ist, die einen Normalenvektor aufweist, der durch die zweite Richtung definiert ist, wobei die erste Richtung eine Richtung ist, in die das magnetische Teil in den Einfügebereich eingefügt ist und die zweite Richtung eine Richtung ist, in die, bei Betrachtung von dem Magnetismussammelteil her, die Magnetfelderzeugungseinheit angeordnet ist, um an das magnetische Teil ein Magnetfeld anzulegen. Ein Volumen der zweiten Komponente ist größer als ein Volumen der ersten Komponente.

Energieerzeugungsmodul

Ein Energieerzeugungsmodul umfasst ein Energieerzeugungselement mit einem in einer Richtung verlängerten Magnetkern und einer um den Magnetkern gewickelten Spule, ein Induktionsjochteil mit einem ersten Induktionsjoch, welches ein Ende des Magnetkerns in einer Längsrichtung des Magnetkerns berührt und aus einem magnetischen Material gefertigt ist, und einem zweiten Induktionsjoch, welches das andere Ende des Magnetkerns in der Längsrichtung berührt und aus einem magnetischen Material gefertigt ist, und ein Magnetteil, das relativ zu dem Energieerzeugungselement in einer Richtung senkrecht zur Längsrichtung verschiebbar ist. Das Magnetteil weist einen ersten Magneten und einen zweiten Magneten auf, die in der Verschieberichtung angeordnet sind. Der erste Magnet weist einen N-Pol-Teil und einen S-Pol-Teil auf, die in der Längsrichtung angeordnet sind. Der zweite Magnet weist einen N-Pol-Teil und einen S-Pol-Teil auf, die in der Längsrichtung angeordnet sind. Der N-Pol-Teil des ersten Magneten und der S-Pol-Teil des zweiten Magneten sind in der Verschiebungsrichtung einander zugewandt, während der S-Pol-Teil des ersten Magneten und der N-Pol-Teil des zweiten Magneten in der Verschiebungsrichtung einander zugewandt sind. Wenn sich das Magnetteil in einer ersten Position relativ zu dem Energieerzeugungselement befindet, ist der N-Pol-Teil des ersten Magneten dem ersten Induktionsjoch zugewandt ist, während der S-Pol-Teil des ersten Magneten dem zweiten Induktionsjoch zugewandt ist. Wenn sich das Magnetteil in einer zweiten Position relativ zu dem Energieerzeugungselement befindet, ist der N-Pol-Teil des zweiten Magneten dem ersten Induktionsjoch zugewandt, während der S-Pol-Teil des ersten Magneten dem zweiten Induktionsjoch zugewandt ist.

エンコーダおよびその製造方法

【課題】階調パターン領域２１以外の非階調パターン領域２２において反射され受光部５に入る光の量を低減することが可能な、エンコーダおよびその製造方法を提供する。 【解決手段】エンコーダ１０は、コード板１と、投光部４と、受光部５とを備える。投光部４はコード板１に光３を照射し、受光部５はコード板１から反射された光３を受光する。コード板１は、投光部４が照射する光３を反射可能な高反射領域と、高反射領域より投光部４が照射する光３の反射率が低い低反射領域とがコード板１の移動方向に沿って交互に並ぶ階調パターン領域と、階調パターン領域に隣接する、投光部４が照射する光３の反射率が低い非階調パターン領域とを含んでいる。非階調パターン領域は、投光部４の照射する光３を受光部５以外の方向へ進行させる拡散構造を有している。 【選択図】図１

回転数検出器

【課題】薄型で信頼性の高い回転数検出器を提供する。 【解決手段】回転数検出器３００は、検出対象の回転体４と共に回転する磁石アセンブリ１１と、磁石アセンブリ１１の上方に配置され、大バルクハウゼン効果により磁化反転する磁性ワイヤ３３と、互いに離間して磁性ワイヤ３３に巻回された複数のコイル部３１，３２を含むピックアップコイルとを備える。磁石アセンブリ１１には、回転の径方向または軸方向に隣接して２つ以上の磁極対が設けられる。 【選択図】図７

Semiconductor Device and Multi-Turn Encoder

An environmental power generation device outputs power generation charges to a power supply line to which a capacitor is connected. When a power generation voltage corresponding to a charging voltage for the capacitor is equal to or higher than an power-on criterion voltage, a voltage comparison circuit outputs a voltage detection signal. An internal circuit of a semiconductor device is powered on in response to the voltage detection signal. A setting change circuit switches the power-on criterion voltage in accordance with a setting input.

Absolute encoder

Provided is an absolute encoder capable of detecting the absolute angle at high resolution and with high precision. An image sensor receives light in an absolute value code pattern of a scale, an edge detecting unit detects from the received light signal an edge pixel position and an edge direction, and an edge position correcting unit corrects the edge pixel position based on the edge direction. A phase detecting unit detects from the corrected edge pixel position the phase shift amount of a shift from a reference pixel position of the image sensor, and a high precision detection unit uses a rough absolute position detected by a rough detection unit and the phase shift amount detected by the phase detecting unit to detect the absolute position with high precision.

Messgeber

Messgeber (50), umfassend:einen Magnetsensor (1) mit einer richtungsabhängigen Detektionsempfindlichkeit für ein Magnetfeld, wobei der Magnetsensor (1) eine höhere Detektionsempfindlichkeit für ein Magnetfeld hat, das in einer Leserichtung vorliegt, und eine geringere Detektionsempfindlichkeit für ein Magnetfeld hat, das in einer Richtung vorliegt, die mit der Leserichtung einen größeren Winkel bildet;einen Messgeberträger (3), an welchem der Magnetsensor (1) montiert ist;eine Magnetfeldabschirmung (2) zum Abschirmen eines Magnetfeldes, wobei die Magnetfeldabschirmung (2) einen Seitenabschnitt (2a), der Seiten des Magnetsensors (1) abdeckt, und einen Oberseitenabschnitt (2b), der eine Oberseite des Magnetsensors (1) abdeckt, umfasst;einen Permanentmanget (4), der dem Messgeberträger (3) zugewandt angeordnet ist;einen Schaft (5), an dessen Ende der Permanentmanget (4) befestigt ist; undeine Halterung (6) zum Tragen des Schaftes (5) auf drehbare Weise, wobei der Oberseitenabschnitt (2b) eine Axialrichtung des Schaftes (5) schneidet und wobei der Seitenabschnitt (2a) die Axialrichtung des Schaftes (5) nicht schneidet;wobei an dem Seitenabschnitt (2a) der Magnetfeldabschirmung (2) eine Aussparung oder ein Loch bereitgestellt ist, welche bzw. welches als einVerbindereinführungsabschnitt (21) dient, durch welchen ein Verbinder einführbar ist,wobei der Verbindereinführungsabschnitt (21) an einer Position angeordnet ist,an welcher der Verbindereinführungsabschnitt (21) nicht mit einem Fortsetzungsbereich überlappt, welcher erhalten wird durch Fortsetzen des Magnetsensors (1) in der Leserichtung ins Halbunendliche und in einer zu der Leserichtung entgegengesetzten Richtung ins Halbunendliche,wobei eine Öffnungsbreite des Verbindereinführungsabschnitts (21) kleiner als eine Größe des Magnetsensors (1) in der Leserichtung ist, undwobei die Leserichtung im Wesentlichen senkrecht zu der Axialrichtung des Schaftes (5) ist.

Position detector and linear transport apparatus

A position detector includes a position detection magnet unit installed at each of a plurality of carriers, and a position detection unit. The position detection magnet unit includes a plurality of magnets disposed such that different magnetic poles are arranged alternately in a transport direction of the carriers, and side magnetic shielding portions installed at the ends of the position detection magnet unit. The position detection unit includes: a processing substrate disposed in parallel to the transport direction of the carriers; a plurality of magnetic detection elements disposed side by side in the transport direction of the carriers on a front side of the processing substrate; and a substrate-side magnetic shielding portion opposite the magnetic detection elements, the substrate-side magnetic shielding portion being installed on a back side of the processing substrate.

多圈編碼器

在具有檢測線圈112,113且該檢測線圈112,113具有巴克豪森效應之無電池多圈編碼器中，具備有旋轉檢測機構110及訊號處理電路120，各檢測線圈產生正負不同符號的電壓脈衝並送出至訊號處理電路，訊號處理電路具有：根據各電壓脈衝的正負符號、及電壓脈衝之未產生，而將檢測線圈的狀態設為高、低、及維持高或低並記憶於記憶體127中之控制器125；以及對應於各檢測線圈的狀態變化而更新旋轉圈數之加法器126，且以約1/4圈單位以內判定旋轉軸的旋轉角。

磁気センサ

【課題】ＭＲ素子の物性および寸法（膜厚、幅、長さ）を変更することなく様々な測定対象の変化を検出する磁気センサを提供すること。 【解決手段】磁界の変動を磁気抵抗素子によって検出する磁気センサにおいて、印加電流が流れる方向と垂直な方向の感磁磁界の変化を検出するＭＲ素子と、印加電流の流れる方向および感磁磁界の方向の両方に垂直な方向に磁界を印加する磁界印加手段と、磁界印加手段が印加する磁界の大きさを調整する磁界調整手段とを備える。 【選択図】図１

光学式エンコーダ

【課題】単一信号トラックで測定対象の変位を精度良く求める光学式エンコーダを提供する。 【解決手段】信号トラック１０３は、光源光を正弦波状に強度変調しその正弦波にλを基本周期として周期Λ＝ｍλ毎に繰り返す位相変調を与える様に形成され、光検出部１０４は、その受光光から正弦信号及び余弦信号を取り出す第１〜第３光検出器対を備え、演算部１０６は、第１及び第２光検出器対の各々からの正弦信号及び余弦信号によりそれらの位置での各電気角を演算し、前記各電気角の和から周期λに対する電気角を求め、前記各電気角の差から第１位相変調信号を求め、第３光検出器対からの正弦信号及び余弦信号によりその位置での電気角を演算し、その電気角と周期λに対する電気角とから第２位相変調信号を求め、第１及び第２位相変調信号から周期Λに対する電気角を求める。 【選択図】図１

旋轉數檢測器

本發明提供一種旋轉數檢測器，實施形態的旋轉數檢測器，係藉由發電部檢測安裝於旋轉體之磁鐵的旋轉數者；其中，前述發電部具備N個(N為1以上之自然數)發電元件，該發電元件具備有藉由大巴克豪生效應而磁化反轉的磁線、以及捲繞該磁線的拾訊器線圈；該磁線係在前述發電元件之前述磁線的延伸方向較前述拾訊器線圈的捲繞部分長，且前述磁線係配置在前述磁鐵之旋轉中心的上方。

Magnetdrehwinkeldetektor

Magnetdrehwinkeldetektor mit:einem scheibenförmigen Magnet (4), der magnetisiert ist, um Magnetpole einmal pro Drehung zu ändern;einer Einheit, die eine Magnetfeldänderung, in der eine Drehungsperiode von m und eine Drehungsperiode von 1 überlagert sind pro Drehung der Einheit, erzeugt mittels Aufnehmen einer Magnetkörper-Schlitzplatte (5), die zusammen mit dem Magnet (4) gedreht wird, wobei die Magnetkörper-Schlitzplatte (5) versehen ist mit einem Teil mit einer hohen Magnetflusspermeabilität und einem Teil mit einer niedrigen Magnetflusspermeabilität, die abwechselnd und wiederholt darauf angeordnet sind, um die Magnetflusspermeabilität m-mal pro Drehung zu ändern, wobei m eine ganze Zahl gleich oder größer als 2 ist;einem Magnetsensor (2), in dem Magneterfassungselemente (6, 61, 62) mit einem Zwischenraum von π/m [rad] oder π [rad] dazwischen angeordnet sind, und der ein Signal der Drehungsperiode von m oder der Drehungsperiode von 1 von der Magnetfeldänderung trennt und nimmt, in dem die Drehungsperiode von m und eine Drehungsperiode von 1 überlagert sind; undeiner Berechnungseinheit (7), die eine Signalkomponente einer Ausgabe des Magnetsensors (2) mit einer Frequenz von 1 pro Drehung von einer Signalkomponente mit einer Frequenz von m pro Drehung trennt und einen absoluten Drehwinkel des Magneten (4) erhält.

Power generation element, and magnetic sensor, encoder, and motor using the same

The present disclosure includes: a magnetic member configured to cause a large Barkhausen effect; a power generation coil disposed so as to be wound around the magnetic member; and soft magnetic members formed at both end portions of the magnetic member so as to be in contact with the magnetic member and so as to press the magnetic member. Consequently, evenness of a magnetic flux density inside the magnetic member is increased, and the large Barkhausen effect is stably caused, whereby a highly stable power generation element is obtained.

磁力式旋轉角檢測器

本發明提供一種磁力式旋轉角檢測器，係具備有：圓盤狀的磁鐵，著磁成每1旋轉中使磁極進行n次(n為1以上之整數)變化；磁性體開縫板，與前述磁鐵一體地進行旋轉，並使磁通透過率高之部分與磁通透過率低之部分交替地重複，俾使每1旋轉中磁通透過率進行m次(m為2以上之整數，且m＞n)變化；磁力感測器，用以檢測通過前述磁性體開縫板之來自前述磁鐵的磁力；以及計算部，用以從前述磁力感測器的輸出求得前述磁鐵的旋轉角度。

Magnetdrehwinkeldetektor

Bereitgestellt wird ein Magnetdrehwinkeldetektor, der einen scheibenförmigen Magnet, der magnetisiert ist, um Magnetpole n-mal pro Drehung zu ändern (wobei n eine ganze Zahl gleich oder größer als 1 ist); eine Magnetkörper-Schlitzplatte, die zusammen mit dem Magnet gedreht wird, wobei ein Teil mit einer hohen Magnetflusspermeabilität und ein Teil mit einer niedrigen Magnetflusspermeabilität abwechselnd und wiederholt darauf angeordnet sind, um die Magnetflusspermeabilität m-mal pro Drehung zu ändern (wobei m eine ganze Zahl gleich oder größer als 2 ist und m > n); einen Magnetsensor, der einen Magnetismus von dem Magnet, wenn der Magnet vorbeigekommen ist, durch die Magnetkörper-Schlitzplatte erfasst; und eine Berechnungseinheit enthält, die den Drehwinkel des Magnets von der Ausgabe von dem Magnetsensor erhält.

Power generation module

A power generation module includes a power generation element having a magnetic core elongated in one direction and a coil wound around the magnetic core, an induction yoke part having a first induction yoke contacting one end of the magnetic core in a longitudinal direction of the magnetic core and made of a magnetic material and a second induction yoke contacting the other end of the magnetic core in the longitudinal direction and made of a magnetic material, and a magnet part that is relatively displaceable relative to the power generation element in a direction perpendicular to the longitudinal direction. The magnet part has a first magnet and a second magnet arranged in the displacement direction. The first magnet has an N-pole part and an S-pole part arranged in the longitudinal direction. The second magnet has an N-pole part and an S-pole part arranged in the longitudinal direction. The N-pole part of the first magnet and the S-pole part of the second magnet face each other in the displacement direction, while the S-pole part of the first magnet and the N-pole part of the second magnet face each other in the displacement direction. When the magnet part is located in a first position relative to the power generation element, the N-pole part of the first magnet faces the first induction yoke, while the S-pole part of the first magnet faces the second induction yoke. When the magnet part is located in a second position relative to the power generation element, the S-pole part of the second magnet faces the first induction yoke, while the N-pole part of the second magnet faces the second induction yoke.