| Patent application number | Description | Published |
|---|
| 20100045271 | ROTATION ANGLE DETECTOR - To provide a rotation angle detector, which is characterized in that the rotation angle detector is for detecting a rotation angle of a measurable rotation body, by which it becomes able to measure the rotation angle of the measurable rotation body with an accuracy as higher even in a case where there may be happened such as an axial backlash or the like on an axis of rotation in the measurable rotation body, and then such a rotation angle detector | 02-25-2010 |
| 20100060272 | ROTATION ANGLE DETECTOR - A rotation angle detector for detecting a rotation angle of a detectable rotation body, comprises: a primary rotation body to be attached to the detectable rotation body and to rotate as integral with the detectable rotation body; a secondary rotation body to rotate as a predetermined rotation ratio for the primary rotation body; a primary rotation detection mechanism to output a signal to be varied periodically as corresponding to a rotation of the primary rotation body; a secondary rotation detection mechanism to output a signal to be varied periodically as corresponding to a rotation of the secondary rotation body; a signal processing unit to calculate the rotation angles of the primary and the secondary rotation bodies using the signals that the primary and the secondary rotation detection mechanisms output; and an operation processing unit to calculate the rotation angle of the detectable rotation body, based on the calculated rotation angle of the primary or of the secondary rotation body, and on a relative rotation angle between the primary and the secondary rotation body, wherein at least any one of the following signals (A) to (D) is designed to have a cycle as different from one cycle for one rotation of the primary rotation body or of the secondary rotation body; (A) an output signal of the primary rotation detection mechanism; (B) an output signal of the secondary rotation detection mechanism; (C) an input signal from the primary rotation detection mechanism to be processed at the signal processing unit; and (D) an input signal from the secondary rotation detection mechanism to be processed at the signal processing unit. | 03-11-2010 |
| 20100109655 | ROTATION ANGLE DETECTOR - A rotation angle detector for detecting rotation angle of a rotator to be measured is provided. The detector includes a magnet which is fixed to the rotator to be measured and is rotated with the rotator to be measured and plural magnetic detection means respectively arranged at a prescribed angle, for detecting intensity of magnetic field generated by the magnet and outputting signals of electric charge based on the intensity of magnetic field. The detector further includes drive means for driving the plural magnetic detection means, where the drive means is capable of simultaneously changing magnetic sensitivities of the plural magnetic detection means in the same ratio. The detector further includes rotation angle calculation means for calculating rotation angle of the rotator to be measured based on signals output from the plural magnetic detection means. | 05-06-2010 |
| 20100148764 | ROTATION ANGLE DETECTOR - A rotation angle detector for detecting the rotation angle of a rotator to be measured which detects the flux density, generated depending on rotation of the rotator to be measured, of a ring-like magnet fixed to the rotator by means of a magnetic detection element. Since a soft magnetic member is interposed between the ring-like magnet and the rotator, rotation angle of the rotator can be measured accurately without being affected by the material or diameter of the rotator or the fixing state of the rotation angle detector to the rotator. Consequently, a rotation angle detector for detecting the rotation angle of a rotator to be measured accurately without being affected by the material or diameter of the rotator or the fixing state of the rotation angle detector to the rotator is presented. | 06-17-2010 |
| 20100185412 | ROTATION ANGLE DETECTOR AND PROCESS FOR DETECTING ROTATION ANGLE - A rotation angle detector for detecting an absolute rotation angle of a detectable rotation body to be rotated a multiple number thereof comprises a first rotation body to be rotated as a cycle of a rotation angle Tc corresponding to a rotation of the detectable rotation body, a first detecting unit for detecting the rotation angle of the first rotation body, a second rotation body to be rotated due to the first rotation body or the detectable rotation body and to be rotated as a cycle of a rotation angle Tm with corresponding to the rotation of the detectable rotation body, that is different from the cycle of the rotation angle Tc regarding the first rotation body. The rotation angle detector further comprises a second detecting unit for detecting the rotation angle of the second rotation body and a rotation angle detecting unit for detecting the absolute rotation angle of the detectable rotation body with reference to a first continuous signal for the angle to be detected by using the first detecting unit and to a second continuous signal for the angle to be detected by using the second detecting unit. The individual rotation bodies are rotated corresponding to the rotation of the detectable rotation body, and a rotation angle of the detectable rotation body to be rotated in a period of the individual rotation bodies to be rotated as 360 degrees is defined as the individual cycles of the rotation angle respectively. In a case where either one of the first rotation body or the second rotation body is assumed to be as a main rotation body, the other one thereof is assumed to be a substitutive, rotation body, the detecting unit for detecting the rotation angle of the main rotation body is defined as a main detecting unit and the detecting unit for detecting the rotation angle of the substitutive rotation body is defined as a substitutive detecting unit regarding the first detecting unit and the second detecting unit, the rotation angle detecting unit detects a number of rotations regarding the main rotation body with reference to a difference of phases ΔT between the first continuous signal for the angle and the second continuous signal for the angle, and calculates the absolute rotation angle of the detectable rotation body to be rotated the multiple number thereof with reference to the individual continuous signals for the angle and the number of rotations to be detected by using the main detecting unit. | 07-22-2010 |
| 20100315074 | ROTATION ANGLE DETECTOR - A rotation angle detector, comprises a magnet having at least a top surface, a bottom surface and a peripheral surface, that is fixed at a detectable rotation body and the same is rotated as integral therewith, a magnetic detecting unit for detecting a strength of a magnetism for the magnet, that is arranged at a peripheral corner part as in vicinity thereof to be formed with the top surface or the bottom surface and with the peripheral surface of the magnet and an arithmetic processing unit for calculating a rotation angle of the detectable rotation body with using an output of the magnetic detecting unit. A part to be formed by removing a part of the peripheral corner part as all around thereof forms a connecting face to correspond between the top surface or the bottom surface and the peripheral surface, and the magnetic detecting unit is arranged at the connecting face as in vicinity thereof. | 12-16-2010 |
