Joy stick

Abstract

PURPOSE:To enhance detection accuracy and expand angle detection range by causing two pairs of magnetic sensors to provide outputs of sine wave signals with phase difference of 1/4 wavelength for a rotating field of permanent magnet and by executing linear signal processings through operations for each 1/4 wavelength. CONSTITUTION:At the one end of an operation lever 1, a non-magnetic ball 2 is fixed, and a cylindrical permanent magnet 3 which is magnetized in the axial direction is buried within the ball 2. The lever 1 and magnet 3 commonly have the same center line passing the center of ball 2, and the ball 2 is supported in precession free by the ball support 4. The magnetic sensors 10, 11 are buried in the ball support 4 and arranged at right angles each other. The sensors 10, 11 are configurated by an MR element and output the sine waves containing phase difference of 1/4 wavelength for the rotating field of magnet 3. Outputs V1, V2 and V3, V4 are given to the operation circuits 12, 13 and these are operated for each 1/4 wavelength and are linearized. Thereby, an output linearized for magnetic field angle can be obtained corresponding to rotating angle and inclination angle of the lever 1. Thus, detection accuracy can be improved and angle detection range can also be widened.

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Cited By (11)

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    DE-19503615-A1August 17, 1995Genge & Thoma AgTwo-dimensional joystick control unit
    GB-2431221-BApril 09, 2008P G Drives Technology LtdControl system
    JP-2001184136-AJuly 06, 2001Itt Mfg Enterp Inc, アイティーティー マニュファクチュアリング エンタープライズィズ インコーポレイテッドジョイスティック
    JP-2007287117-ANovember 01, 2007Jae Woo Yang, ヤン・ジェ−ウーYang, Jae WooContactless electron joystick of universal joint structure using single hall sensor
    JP-4568395-B2October 27, 2010アイティーティー マニュファクチュアリング エンタープライズィズ インコーポレイテッドITT Manufacturing Enterprises Inc.ジョイスティック
    JP-S61232687-AOctober 16, 1986Aichi Tokei Denki Co LtdMagnetoresistance element
    US-5850142-ADecember 15, 1998Measurement Systems, Inc.Control device having a magnetic component with convex surfaces
    US-6606085-B1August 12, 2003Fujitsu Takamisawa Component LimitedCoordinate input device
    US-7757579-B2July 20, 2010Sauer-Danfoss Inc.Joystick device with redundant sensor processing
    US-8054291-B2November 08, 2011Asahi Kasei Emd CorporationPointing device
    WO-9844313-A1October 08, 1998Measurement Systems, Inc.Dispositif de commande a actionnement magnetique