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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/1662


    Title: 地磁感測儀研發;Research and Development of Magnetometer
    Authors: 劉立業;Li-Yet Liu
    Contributors: 光機電工程研究所
    Keywords: 地球磁場;磁力計;地磁感測儀;magnetometer;geo-magnetic field
    Date: 2006-07-06
    Issue Date: 2009-09-21 09:57:16 (UTC+8)
    Publisher: 國立中央大學圖書館
    Abstract: 本論文係實現以異向性磁敏電阻感測器(Anisotropic Magneto- Resistive Sensor)為基礎之三維度磁場感測系統,含括了三維度磁場量測數學模型的建立、感測器類比電路的設計、實現演算法之數位訊號處理平台設計、PC端人機介面軟體設計、測試平台機構的組裝,以及實際量測校正參數的結果與分析。 本文之重要突破技術為我們所設計之軟體演算法,係直接利用地球表面的磁場,即可校正地磁感測儀因AMR感測器本身特性不一致,以及元件焊接、組裝過程中所造成的非理想特性。 以軟體模擬分析本校正演算法的效能,當改變軸偏移量時量測得到的誤差落於0.05%FS以內;改變軸倍率時量測得到的誤差落於0.16%FS以內;當軸間相位差的誤差為零時,改變軸傾斜角時量測得到的誤差落於0.1%FS以內。以實際量得之數據代入演算法進行校正,並且使用校正出來的參數補償量測數據,則可發現軸偏移量與軸倍率明顯得到補正效果。 We implement a three-dimensional geo-magnetic sensing system based on Anisotropic Magneto-Resistive sensors. In this article, we describe the construction of the mathematic model, frameworks of the sensing circuit and signal processing circuit, concept of the human-machine interface, assembly of rotating-test platform, simulation result and true data analysis. We put more emphasis on the calibration algorithm of this system, which directly make use of the geo-magnetic field to calibrating our magnetometer. Therefore, we could compensate the un-ideal characteristics of the magnetometer. In simulation, the change of a single axis offset results to an RMS error within 0.05FS%; the change of a single axis sensitivity results to an RMS error within 0.16FS%; the change of a single axis skew angle results to an RMS error within 0.1FS% when we let the axes phase error (the α angle) off. In experiment, we use the algorithm to calculate the compensation parameters from raw data and compensate the raw data by using these parameters, then we find that the offsets and sensitivities are well-compensated.
    Appears in Collections:[光機電工程研究所 ] 博碩士論文

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