10 results about "Barkhausen effect" patented technology

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 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).

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.

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.

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 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 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.

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 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 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.