A Preliminary Discussion on the Hysteresis Error of the Magneto-elastic Force Transducer
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摘要: 回線誤差是影響磁彈效應力傳感器綜合精度的一項重要誤差。為了探索這類誤差產生的原因,本文設計了3%Si-Fe冷軋Goss織構電工銅片單晶體拉應力試樣。實驗結果表明,隨著樣品工作區中單晶體的[100]方向與應力σ之間的夾角θ的變化,樣品的回線誤差不但有數值大小的變化,而且回線誤差的類型也不同。一種是,當減載時,傳感器的輸出電壓值高于加載到同一載荷時傳感器的輸出電壓值,另一種則與此相反。本文分析了這類材料的傳感器在工作狀態下,單晶體內磁鑄分布的變化過程,認為回線誤差大小及類型隨θ角的變化,是單晶體內晶體缺陷與鑄壁相互作用的結果。Abstract: Hysferesis error is one of the most important factors by which the precision of the magnetoelastic effect force transducer is affected. For the s-ake of investigating the origin of the hysferesis error, a 3%Si-Fe cold rol- led single oriented electric sheet sample was used. In the mesurement region of the sample, there was only one crysial. The results showed that bot-h of the magnitude and the type of the hysferesis error of the sample varied with θ,the angle between the[100] of the crystal and the direction of the stress a.There were two kinds of hysteresis error,one of which was positive and the other negative. In this article the authors analysised the processes of the change in magnetic domains distribution of the sample. It seems that the variation of the magnitude and type of hysteresis error of the sample is due to the interactions between domain walls and crystal defects, particularly dislocations.
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