ROTATION ANGLE AND STROKE-AMOUNT DETECTION DEVICE

• Main Authors: NISHIMOTO SEIJI, MIZUTANI AKITOSHI
• Format: Patent
• Language: English; Japanese
• Published: 23.05.2016
• Subjects: ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS; MEASURING; MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR; PHYSICS; TARIFF METERING APPARATUS; TESTING

PROBLEM TO BE SOLVED: To provide a rotation angle and stroke-amount detection device that allows a simple configuration to detect a rotation angle of a rotatable and linearly displaceable detection object and an amount of stroke thereof.SOLUTION: A rotation angle and stroke-amount detection device 1 has: a sensor unit 2; a rotation angle computation unit 51; and a stroke-amount computation unit 54. The sensor unit 2 has a sin sensor 21 and a cos sensor 22 as a magnetic detection element detecting a magnetic field varying accompanied by a rotation of a detection object 8 and linear displacement thereof, and outputs a sin signal Ys and a cos signal Yc on the basis of a detection value of the sensors 21 and 22. The rotation angle computation unit 51 computes a rotation angle α of the detection object 8 on the basis of the sin signal Ys and the cos signal Yc output by the sensor unit 2. The stroke-amount computation unit 54 computes an amount of stroke ΔX of the detection object 8 on the basis of the sin signal Ys and the cos signal Yc common to a signal to be used by the rotation angle computation unit 51. Accordingly, a configuration of the sensor unit 2 is simplified to allow a physical dimension of the device to be downsized.SELECTED DRAWING: Figure 3 【課題】回転且つ直線変位可能な検出対象の回転角度及びストローク量を簡素な構成で検出する回転角度及びストローク量検出装置を提供する。【解決手段】回転角度及びストローク量検出装置１は、センサ部２、回転角度演算部５１及びストローク量演算部５４を備える。センサ部２は、検出対象８の回転及び直線変位に伴って変化する磁界を検出する磁気検出素子としてのｓｉｎセンサ２１及びｃｏｓセンサ２２を有し、センサ２１、２２の検出値に基づくｓｉｎ信号Ｙｓ及びｃｏｓ信号Ｙｃを出力する。回転角度演算部５１は、センサ部２が出力したｓｉｎ信号Ｙｓ及びｃｏｓ信号Ｙｃに基づき、検出対象８の回転角度αを演算する。ストローク量演算部５４は、回転角度演算部５１が用いる信号と共通のｓｉｎ信号Ｙｓ及びｃｏｓ信号Ｙｃに基づき、検出対象８のストローク量ΔＸを演算する。これにより、センサ部２の構成を簡素とし、装置の体格を小さくすることができる。【選択図】図３