30 results about "Barkhausen effect" patented technology

Provided is an electric power generating element and the like that are easy to appropriately apply a magnetic field to a magnetic body and easy to be manufactured. Electric power generating element (32) includes magnetic body (40) that exhibits a large Barkhausen effect, coil (42) wound around magnetic body (40), first soft magnetic body (44) positioned outside coil (42) in a winding axis line direction in which winding axis line (B) of coil (42) extends and positioned outside magnetic body (40) in a radial direction around winding axis line (B), and filling member (48) that includes a second soft magnetic body and fills a gap between magnetic body (40) and first soft magnetic body (44).

A position detection device includes: a first support; a second support that is movable relative to the first support; a power generation sensor disposed on the first support; and a magnetic field generation source fixed to the second support. The relative movement of the second support causes a plurality of magnetic poles having the same polarity to sequentially enter the detection region of the power generation sensor. The power generation sensor includes: a magnetic wire configured to exhibit a large Barkhausen effect; a coil wound around the magnetic wire; and a first magnetic flux conducting piece and a second magnetic flux conducting piece respectively magnetically coupled to the opposite end portions of the magnetic wire and each having a magnetic flux conducting end opposed to the detection region.

The present invention suppresses the occurrence of erroneous detection by a rotation detector. A rotation detector (1) is provided with: a magnet (10) that rotates around a predetermined axis; a power generation circuit (50) having a power generation element (20) that generates power using the large Barkhausen effect, a voltage detection unit (31) that detects the voltage generated by the power generation element (20), and a power storage unit (32) that stores power generated by the power generation element (20); a rotation position detection unit (60) having a magnetic sensor (61) provided corresponding to the power generation element (20) and an information processing unit (62) for determining the rotation position of the rotation shaft; a power supply unit (70) that supplies power generated by the power generation element (20) to the magnetic sensor (61); and a control circuit (80). The control circuit (80) controls the supply of power generated by the power generation element (20) from the power supply unit (70) to the magnetic sensor (61) on the basis of the voltage generated by the power generation element (20), the first voltage threshold value, and the second voltage threshold value.

The rotation detection device includes an annular multi-pole magnet provided on a rotating shaft and a power generation sensor that detects a magnetic field that changes with rotation of the multi-pole magnet. The power generation sensor includes a magnetic conductive wire exhibiting a large Barkhausen effect, a coil wound around the magnetic conductive wire, and a pair of magnetic flux conduction sheets comprising soft magnetic members magnetically coupled to both ends of the magnetic conductive wire, respectively. The annular multi-pole magnet has a magnetization pattern inclined with respect to the rotation axis at the outer peripheral portion. The power generation sensor faces the magnetization pattern of the multipole magnet in a posture in which the axial direction of the magnetic wire is parallel to the rotation axis.

The present application relates to an encoder with a high magnetic permeability structure for improving vibration resistance and impact resistance in an encoder equipped with a magnetic power generation element having a large Barkhausen effect. An encoder (10) with a high magnetic permeability structure is provided with a rotating disk (2), a magnetic field generating portion (3), a magnetic power generation element (4) having a large Barkhausen effect, and a magnetic detection element (5), wherein one or more high magnetic permeability structures (6) capable of changing the relative position with respect to the magnetic power generation element (4) are provided, and the magnetic field generating portion (3) is configured independently of the disk (2).

To provide a rotation detector capable of executing more stable rotation position detection processing.SOLUTION: The rotation detector 1 includes a magnet 10 rotating together with a rotation shaft 11, a power generation circuit 20 having a power generation element 21 generating power by utilizing the large Barkhausen effect, a magnetic sensor 41, an information processing part 42 detecting the rotation position of the rotation shaft 11, and a power supply part 30 supplying power to the magnetic sensor 41 and the information processing part 42, the power generation circuit 20 includes a first power storage part 23 storing power generated by the power generation element 21, a second power storage part 26 for storing power, and a power storage control part 27 controlling charging and discharging according to the voltage of the first power storage part 23 and the voltage of the second power storage part 26, the first power storage device 23 supplies power necessary for the rotation position detection processing to the power supply unit 30. At the end of the rotation position detection processing, the second power storage device 26 stores part of the power remaining in the first power storage device 23 before the first power storage device 23 is discharged to the outside in the discharge processing.SELECTED DRAWING: Figure 1

The aim is to improve vibration and shock resistance in a coding device equipped with a magnetic force-generating element exhibiting a large Barkhausen effect. A coding device 10 with a high-permeability structure is a coding device comprising a rotating disk 2, magnetic field-generating elements 3, a magnetic force-generating element 4 exhibiting a large Barkhausen effect, and a magnetic sensor 5, wherein one or more high-permeability structures, i.e., highly permeable structures 6, are provided to be able to change relative positions with respect to the magnetic force-generating element 4, and wherein the magnetic field-generating elements 3 are arranged independently of the disk 2.

A power generation element (10) is provided with: a plurality of magnetic wires (11) having a large Barkhausen effect; a pickup coil (12) wound around a wire harness of the plurality of magnetic wires (11); and a magnetic connection member (13) that magnetically connects ends of the plurality of magnetic wires (11) to each other at both ends of the plurality of magnetic wires (11), the magnetic wires (11) generating a pulse voltage in the pickup coil (12) by a large Barkhausen effect when a magnetic field applied to the magnetic wires (11) is reversed.

Provided is a rotation detector capable of executing stable rotation position detection processing. The rotation detector includes a magnet that rotates together with the rotating shaft, a power generation circuit having a power generation element that generates power using a large Barkhausen effect, a magnetic sensor, an information processing unit that detects a rotational position of the rotating shaft, and a power supply unit that supplies power to the magnetic sensor and the information processing unit. The power generation circuit includes a first power storage unit that stores power generated by the power generation element, a second power storage unit that stores power, and a power storage control unit that controls charging and discharging on the basis of the voltage of the first power storage unit and the voltage of the second power storage unit. The first power storage unit supplies power required for rotational position detection processing to the power supply unit. The second power storage unit stores a portion of power remaining in the first power storage unit before the first power storage unit discharges to the outside by the discharge process at the end of the rotational position detection process.

A power generation sensor includes a magnetic wire configured to exhibit a large Barkhausen effect, a coil wound around the magnetic wire, and a pair of magnetic flux conducting pieces that include a pair of magnetically-soft components respectively magnetically coupled to the opposite end portions of the magnetic wire. The pair of magnetic flux conducting pieces include a pair of axis-orthogonal portions respectively fixed to the opposite end portions of the magnetic wire and respectively extending parallel to each other orthogonally to the axial direction from the opposite end portions of the magnetic wire, and a pair of axis-parallel portions extending toward each other in the axial direction from the distal ends of the axis-orthogonal portions with their adjacent ends opposed to each other and spaced a gap from each other in the axial direction.

The invention provides an encoder which can detect the rotation angle in one rotation and the amount of multiple rotations with redundancy. A redundant encoder (100) is configured to be provided with: a first rotation detection unit (10) which is provided with a magnetic field generation unit (5) having an N pole (2) and an S pole (3), each of which has two or more poles, and which detects the amount of rotation at a resolution of 1 / 2 revolutions or less; and a second rotation detection unit (20) that detects the amount of rotation at a higher resolution than the first rotation detection unit (10). The magnetic field generation unit (5) uses a permanent magnet. The first rotation detection unit (10) is configured so as to be provided with a magnetic power generation element (26) having a large Barkhausen effect, and a magnetic detection element (27) having a Hall effect or a magnetoresistive effect.

The vibration power generation module (60) is attached to the vibrating body (32) via a spring (21), and the spring constant and self-weight of the spring (21) are determined so as to resonate in a pendulum-like motion together with the spring (21) by the vibration of the vibrating body (32). It includes a magnet part (24) provided with a permanent magnet, and a power generation element (10) in which a voltage is generated by electromagnetic induction and the large Barkhausen effect in a coil wound around a magnetic core due to a change in the magnetic field based on the relative displacement of the position between the resonating magnet part (24).

This invention provides a composite magnetic line, etc., that can stabilize the amount of electricity generated in power generation utilizing the Great Barkhausen effect. [Solution] The composite magnetic wire 110 comprises a core material 111 made of a non-magnetic material and a cylindrical magnetic member 112 made of a magnetic material that produces a large Barkhausen effect in response to changes in an external magnetic field, and which has a cylindrical shape that covers the core material 111. The cylindrical magnetic member 112 is continuous without interruption around the entire circumference of the core material 111.

[Problem] To provide an encoder capable of detecting a rotation angle within one rotation and detecting the amount of multi-rotations, both with redundancy.　[Solution] A redundant encoder 100 has a configuration comprising: a first rotation detection unit 10 that includes a magnetic field generation unit 5 having two or more N poles 2 and two or more S poles 3 and detects a rotation amount with a resolution of less than or equal to 1 / 2 rotation; and a second rotation detection unit 20 that detects a rotation amount with a resolution higher than that of the first rotation detection unit 10. A permanent magnet is used for the magnetic field generation unit 5. The first rotation detection unit 10 has a configuration including a magnetic power generation element 26 that exhibits a large Barkhausen effect and a magnetic detection element 27 that exhibits a Hall effect or a magnetoresistance effect.

To provide an encoder that can detect a rotation angle in one rotation and detect the amount of multiple rotations with redundancy.SOLUTION: A redundant encoder 100 comprises: a first rotation detection unit 10 that includes a magnetic field generation unit 5 having two or more N poles 2 and two or more S poles 3 and detects the amount of rotations with a resolution of 1 / 2 rotation or less; and a second rotation detection unit 20 that detects the amount of rotations with a resolution higher than the first rotation detection unit 10. A permanent magnet is used for the magnetic field generation unit 5. The first rotation detection unit 10 comprises a magnetic power generation element having a large Barkhausen effect, and a magnetic detection element having a Hall effect or a magnetoresistance effect.SELECTED DRAWING: Figure 1

The present invention relates to a magnetic detection device. Even when three magnetic sensors are intensively mounted on a single substrate, the distances between the magnetic wire materials and the axis of the rotation axis are made equal to each other, thereby improving the accuracy of signal processing for identifying the rotation of the rotation axis. The magnetic detection unit (30) of the rotation detection device includes three magnetic sensors (31 to 33) and a substrate (45) on which these magnetic sensors are mounted. Each magnetic sensor includes a magnetic wire material (34) that generates the large Barkhausen effect, a coil (35), and a bobbin (36). Each magnetic sensor is arranged on the substrate such that the elongation direction of the magnetic wire material is parallel to the substrate (45). The magnetic detection unit is arranged on the outer peripheral side of the track of the magnetic field forming unit such that the elongation direction of the magnetic wire material is parallel to the axial direction of the rotation axis (3). In each magnetic sensor, the position of the magnetic wire material arrangement portion (38) in the bobbin is set such that the distances between the magnetic wire materials of the three magnetic sensors and the rotation axis are equal to each other.

[Problem] To enhance vibration resistance and impact resistance in an encoder equipped with a magnetic power generation element having a large Barkhausen effect.　[Solution] An encoder 10 with a high permeability structure comprises a rotating disk 2, a magnetic field generation part 3, a magnetic power generation element 4 having a large Barkhausen effect, and a magnetic detection element 5. One or a plurality of high permeability structures, viz. high permeability structures 6, are provided so that the relative positions thereof with respect to the magnetic power generation element 4 are changeable. The magnetic field generation part 3 is disposed independently of the disk 2.

The magnetic sensor device 3 comprises a sensor unit 4 and substrate-side connectors 24, 25. The sensor unit 4 comprises a magnetic sensor, a yoke, and a casing 19. The magnetic sensor comprises a magnetic wire rod that generates a large Barkhausen effect, a bobbin having the magnetic wire rod disposed therein, a coil formed by winding an electrical wire around the bobbin, a sensor-side connector provided in the left end portion of the bobbin, and a sensor-side connector provided in the right end portion of the bobbin. The magnetic sensor device 3 is provided on the substrate 35 by mounting the substrate-side connectors 24, 25 to the substrate 35 and, thereafter, connecting the sensor unit 4 to the substrate-side connectors 24, 25.

The invention provides an anti-counterfeit label. The anti-counterfeit label comprises a base material; the anti-fake material layer is embedded into the base material in a composite mode and / or located on the surface of the base material, and the anti-fake material layer is used for providing anti-fake signals; the sensor is arranged on one side of the anti-counterfeiting material layer and is used for detecting an anti-counterfeiting signal; wherein the anti-counterfeiting material layer comprises a soft magnetic fiber or a thin film material with a large Barkhausen effect. According to the technical scheme, under the set external excitation condition, the anti-counterfeit material layer can generate unique signal characteristics, the signal can be detected by the sensor compounded on the anti-counterfeit label, the influence generated by position deviation can be eliminated, the excitation unit and the sensing unit of the detection system are separated, and the detection accuracy is improved. And the concealment of the detection device can be improved.

Provided is a power generation element or the like capable of reducing variations in the amount of power generation. A power generation element (100) is provided with: a magnetic member composite body (110) having a plurality of magnetic members (120) bundled into a bundle, each of the plurality of magnetic members (120) generating a large Barkhausen effect according to a change in an external magnetic field; and a coil (130) wound around the magnetic member complex (110). Each of the plurality of magnetic members (120) has a first magnetosensitive part (121) and a second magnetosensitive part (122), and the second magnetosensitive part (122) is more magnetic than the first magnetosensitive part (121). The first magnetosensitive part (121) is magnetized in the winding axis direction of the coil (130), and the magnetization direction does not change in accordance with a change in the direction of the external magnetic field. The plurality of magnetic members (120) include a first magnetic member (120a) in which the first magnetosensitive portion (121) is magnetized in a first direction, and a second magnetic member (120b) in which the first magnetosensitive portion (121) is magnetized in a second direction opposite to the first direction.

Provided is an electric power generating element and the like that are easy to appropriately apply a magnetic field to a magnetic body and easy to be manufactured. Electric power generating element (32) includes magnetic body (40) that exhibits a large Barkhausen effect, coil (42) wound around magnetic body (40), first soft magnetic body (44) positioned outside coil (42) in a winding axis line direction in which winding axis line (B) of coil (42) extends and positioned outside magnetic body (40) in a radial direction around winding axis line (B), and filling member (48) that includes a second soft magnetic body and fills a gap between magnetic body (40) and first soft magnetic body (44).

This invention provides a means to improve vibration resistance and shock resistance in an encoder equipped with a magnetic power generation element that exhibits a large Barkhausen effect. [Solution] The encoder 10 with a high-permeability structure comprises a rotating disk 2, a magnetic field generating unit 3, a magnetic power generation element 4 having a large Barkhausen effect, and a magnetic detection element 5, wherein one or more high-permeability structures, i.e., high-permeability structures 6, are provided so as to be able to change their relative position to the magnetic power generation element 4, and the magnetic field generating unit 3 is arranged independently of the disk 2.

The power generation sensor includes a magnetic wire that exhibits a large Barkhausen effect by an alternating magnetic field applied by a magnetic field generation source, a coil wound around the magnetic wire, and a pair of soft magnetic members magnetically coupled to both ends of the magnetic wire, respectively. A pair of soft magnetic material members is bonded and fixed to each of the two ends of the magnetic conductive wire by means of a soft magnetic resin comprising a resin containing a soft magnetic material. In one embodiment, a pair of soft magnetic members are disposed between a magnetic wire and a magnetic field generation source, and both end portions of the magnetic wire and surfaces of the pair of soft magnetic members that do not face the magnetic field generation source are bonded and fixed by a soft magnetic resin.

A pulse signal generator includes a power generation sensor and a magnetic field generation source. The power generation sensor includes: a magnetic wire that exhibits a large Barkhausen effect by an alternating magnetic field applied in an axial direction; a coil wound on the magnetic conductive wire; and a pair of magnetic flux conducting sheets magnetically coupled to both end portions of the magnetic conductive wire, respectively. The pair of magnetic flux conducting sheets includes: a pair of axially orthogonal portions extending parallel to each other in an axially orthogonal direction orthogonal to the axial direction; and a pair of axially parallel portions extending in a direction in which the axially parallel portions approach each other in the axial direction from a tip portion of the axially orthogonal portion. The power generation sensor is configured so that the side opposite to the magnetic lead wire with respect to the axially parallel portion is a detection region. The magnetic field generation source has a magnetic pole that moves along a track passing through the detection region by a relative movement with the power generation sensor.

The voltage generated in the pickup coil could sometimes decrease due to mutual interference between magnetic wires. [Solution] The present invention provides a power generation element comprising a plurality of magnetic wires made of a magnetic material that produces a large Barkhausen effect, and a pickup coil wound around the central part of the plurality of magnetic wires, wherein the distance between the magnetic wires at both ends is greater than the distance between the magnetic wires at the central part, thereby providing a power generation element that can generate high power generation efficiency and a large amount of power.

This vibration power generation module (60) is provided with: a magnet unit (24) that is attached to a vibrating body (32) via a spring (21), and that is provided with a permanent magnet in which the spring constant of the spring (21) and the weight thereof are determined so as to resonate with the spring (21) in a swinging motion shape with the vibration of the vibrating body (32); and a power generation element (10) that generates a voltage due to electromagnetic induction and a large Barkhausen effect on a coil wound around the magnetic body core due to a change in a magnetic field based on the relative displacement of the position with the magnet unit (24) that resonates.

This self powered sensor comprises: a first soft magnetic component; a second soft magnetic component; a magnetic wire capable of exhibiting a large Barkhausen effect; a coil; a first external electrode terminal attached to the first soft magnetic component; and a second external electrode terminal attached to the second soft magnetic component. A first coil terminal wire and a second coil terminal wire are respectively joined to the first external electrode terminal and the second external electrode terminal by welding.

A power generation element or the like is provided that can reduce fluctuations in power generation. The power generation element (100) comprises: a magnetic element assembly (110) including a plurality of magnetic elements (120) that are bundled together and each of which exhibits the strong Barkhausen effect due to a change in an external magnetic field; and a coil (130) wound on the magnetic element assembly (110). Each of the plurality of magnetic elements (120) includes a first magnetosensitive part (121) and a second magnetosensitive part (122) that is magnetically softer than the first magnetosensitive part (121). The first magnetosensitive part (121) is magnetized in the direction of the winding axis of the coil (130), and the direction of magnetization of the first magnetosensitive part (121) does not change due to a change in the direction of the external magnetic field.The plurality of magnetic elements (120) comprise: a first magnetic element (120a) in which the first magnetosensitive part (121) is magnetized in a first direction; and a second magnetic element (120b) in which the first magnetosensitive part (121) is magnetized in a second direction opposite to the first direction.

Deviation in the amount of power generated by a power generation element is reduced. A composite magnetic member (101) is provided with: a magnetic member (110) which generates a large Barkhausen effect by a change in an external magnetic field, and which has a linear shape extending in a first direction (D1); two magnetism collecting members (150) which are spaced apart from each other and arranged side by side in the first direction (D1), and which are provided with an opening (151) into which a part of the magnetic member (110) is inserted; and a resin member (170) that fixes the magnetic member (110) and the two magnetism collecting members (150). The resin member (170) has a first covering portion (171) that covers the outer peripheral surface (111) of the magnetic member (110) at least between the two magnetism collecting members (150). A space (135) in which the coil (130) is disposed is provided between the two magnetic collection members (150).

A power generating element (10) comprises: a plurality of magnetic wires (11) having a large Barkhausen effect; a take-up coil (12) wound around a bundle of the plurality of magnetic wires (11); and magnetic connectors (13) magnetically connecting ends of the plurality of magnetic wires (11) at both ends of the plurality of magnetic wires (11), wherein the magnetic wires (11) generate a pulse voltage in the take-up coil (12) upon reversal of a magnetic field applied to the magnetic wires (11) by the large Barkhausen effect.