本文探討溫度對環形磁性編碼器系統誤差的影響，分成三個研究方向：第一為溫度造成磁環本體的尺寸與材料影響；第二為磁環安裝於產品或是實驗平台上時，磁環偏心量與感測間隙因溫度變化而影響系統精度能力；第三為讀頭受溫度影響分析，探討讀頭內之磁阻陣列間距膨脹後所造成的精度誤差。本文研究的溫度變化範圍設定為 10℃ ~ 75℃，並且利用模擬軟體做各項影響因子分析，再建立環境溫度實驗平台，用於驗證理論模型並量化誤差，釐清溫度作用下，影響環形磁性編碼器精度誤差的來源，致力於在不同溫度下使其保有室溫的精度品質，並可將分析結果作為未來產品化設計的參考準則。

The purpose of this study is to investigate the temperature effect on system errors of a rotary magnetic encoder, such as pole-pitch error, magnetic field error, assembly error and AMR elements detecting error. An accuracy analysis in various aspects, including thermal expansion in 1mm pole-pitch, distance expansion between AMR array, and magnetic field changes due to the physical characteristics of encoder material. In consideration with the above requirement, an environmental test platform was constructed to conduct experiments and to measure system errors in the range of 10 to 75℃.
Experiments were planned to check assembly errors occurring in various temperatures and verify the correctness of the mathematical model. The results indicated that the concentricity of the rotary encoder and measuring gap were relatively sensitive to this system when temperature was not in a standard condition.
Finally, a relationship was established between temperature and encoder precision. It also provides advices for how to reduce the system errors of a rotary magnetic encoder in industrial applications.

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