摘要
采用分段折线近似磁滞回线,分析了矫顽力对磁通门输出的影响,通过理论推导得到各偶次谐波灵敏度解析表达式。比较了二次谐波选择法和四次谐波选择法灵敏度,量程和非线性度。详细讨论了四次谐波的适用条件。研究结果表明选取四次谐波还是选取二次谐波,不仅取决于激励磁场与饱和磁场强度比值,还取决于矫顽力与饱和磁场强度比值。研究结果对实际应用中磁通门的谐波选择有重要指导意义。
Using subsectional linearized hysteresis model,the effect of coercivity on the output is analyzed,and even harmonics of the fluxgate output signal are obtained.The sensitivity,linear range,and nonlinearities of second harmonic were compared with that of fourth-order harmonics.Applicable conditions of fourth-order harmonic is discussed in detail.The analysis shows that choosing second harmonic or fourth harmonic is not only dependent on the ratio of the amplitude of excitation magnetic field to the saturation magnetic intensity,but also on the ratio of the coercivity to the saturation magnetic intensity.The research results are very useful in the selection of harmonic content distribution in practice application.
出处
《传感技术学报》
CAS
CSCD
北大核心
2011年第10期1412-1415,共4页
Chinese Journal of Sensors and Actuators
基金
国家自然科学基金面上项目(60874101)
