電流尺的構想是以嶄新的方式來製作，提供低成本，高精度的直線編碼器。本文從電流尺的理論基礎—畢歐-沙瓦定律（Biot and Savart’s Law）—著眼，從磁阻感測器（Magneto-resistivity sensor）的原理—磁阻效應（Magneto-resistivity effect）—著手，於現有的實驗平台架構下，重新規劃磁阻感測模組的電路設計，並將驅動電流尺的模式，由脈衝電流改為定電流的形式，成功地改善電流尺系統的輸出波形，使得電流尺達到工業標準之應用的願景，又再度邁進了一步。 除此之外，本文完成以有限元素法來模擬電流尺的磁通量分布 ，以及分析一些影響電流尺磁場分布的因子，提供日後設計電流尺時的參考依據。 The idea of an electrical linear encoder made in a brand-new way is to supply the industry with a low cost and high precision linear encoder. This paper has in mind from the principle of the electrical linear encoder— Biot and Savart’s Law, and starts from the principle of magneto-resistivity sensors—magneto-resistivity effect. Under the present frame of experiment, it not only finished redesigning the magneto-resistivity sensor’s circuit board, but also changed the mode of driving electrical linear encoder from the mode of pulse current to that of constant current. Successfully, it improved the resulting output waveform so that an electrical linear encoder takes one step ahead to achieve the dream of the industry standard’s application. In addition, this paper finished simulating the electrical linear encoder’s distribution of the magnetic flux, and analyzing some factors which have effects on the electrical linear encoder’s distribution of the magnetic flux as the later design references.
