坑道水核磁共振探测激发磁场计算与测试方法研究
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摘要
提出一种测量激发场垂直于地磁场分量的测量方法:应用固定线圈电磁感应法测量激发场,应用磁通门传感器测量地磁场,通过矢量运算求解激发场垂直于地磁场的分量。制作了激发场测量装置,通过对比激发场的径向分量和轴向分量的理论计算值和实测值,验证测量装置有效性。分析固定点处激发场垂直于地磁场的分量受线圈布设方向的影响,推导出固定点处激发场垂直于地磁场的分量取最大值时线圈布设角度求解方法,为实际探测线圈布设方向提供理论指导。
Magnetic field component values,which is vertical to the geomagnetic field is put forward: the fixed coils electromagnetic induction method is adopted to detect the magnetic field,flux-gate sensor method is adopted to detect geomagnetic field,the magnetic field's component values,which is vertical to the geomagnetic field,is calculated through the vector calculation. The magnetic field detection device is made. By comparing theoretical calculation with actual measurement of magnetic field's radial component values and axial component values,the magnetic field detection device is proved to be effective. The influnence,which is caused by the excitation direction of coil changed,to a fixed point's magnetic field component values,which is vertical to the geomagnetic field,is analyzed. The method to calculate the excitation coils ' best direction is put forward. In this direction,a fixed point's magnetic field component values,which is vertical to the geomagnetic field,is the biggest. As a result,it gives a theory guidence in the specific detection.
Magnetic field component values,which is vertical to the geomagnetic field is put forward: the fixed coils electromagnetic induction method is adopted to detect the magnetic field,flux-gate sensor method is adopted to detect geomagnetic field,the magnetic field's component values,which is vertical to the geomagnetic field,is calculated through the vector calculation. The magnetic field detection device is made. By comparing theoretical calculation with actual measurement of magnetic field's radial component values and axial component values,the magnetic field detection device is proved to be effective. The influnence,which is caused by the excitation direction of coil changed,to a fixed point's magnetic field component values,which is vertical to the geomagnetic field,is analyzed. The method to calculate the excitation coils ' best direction is put forward. In this direction,a fixed point's magnetic field component values,which is vertical to the geomagnetic field,is the biggest. As a result,it gives a theory guidence in the specific detection.
引文
[1]林君,蒋川东,段清明,等.复杂条件下地下水磁共振探测与灾害水源探查研究进展[J].吉林大学学报:地球科学版,2012,42(9):1560-1570.
[2]黄俊革,王家林,阮百尧.坑道直流电阻率法超前探测研究[J].地球物理学报,2006,49(5):1529-1538.
[3]张立新,李长洪,赵宇.矿井突水预测研究现状及发展趋势[J].中国矿业,2009,18(1):88-108.
[4]林君,段清明,王应吉.核磁共振找水仪原理与应用[M].北京:科技出版社,2010.
[5]王应吉,王微,林君.坑道水核磁共振超前探测响应数值模拟[J].实验室研究与探索,2013,32(11):37-42.
[6]康中尉,罗飞路,胡媛媛,等.交变磁场测量数学模型及类匀强场的建立[J].无损检测,2004,26(11):545-551.
[7]Kamada O.Magnetic field sensors based on a ring interferometry[J].IEEE Transactions on Magnetics,1999,35(5):3628-3630.
[8]尹春晓.磁通门传感器及其模拟处理电路的研究[D].长春:吉林大学,2010.
[9]田雨,王成林.有源交变磁场导向定位方法及实验研究[J].电子测量技术,2011,34(10):4-7.
[2]黄俊革,王家林,阮百尧.坑道直流电阻率法超前探测研究[J].地球物理学报,2006,49(5):1529-1538.
[3]张立新,李长洪,赵宇.矿井突水预测研究现状及发展趋势[J].中国矿业,2009,18(1):88-108.
[4]林君,段清明,王应吉.核磁共振找水仪原理与应用[M].北京:科技出版社,2010.
[5]王应吉,王微,林君.坑道水核磁共振超前探测响应数值模拟[J].实验室研究与探索,2013,32(11):37-42.
[6]康中尉,罗飞路,胡媛媛,等.交变磁场测量数学模型及类匀强场的建立[J].无损检测,2004,26(11):545-551.
[7]Kamada O.Magnetic field sensors based on a ring interferometry[J].IEEE Transactions on Magnetics,1999,35(5):3628-3630.
[8]尹春晓.磁通门传感器及其模拟处理电路的研究[D].长春:吉林大学,2010.
[9]田雨,王成林.有源交变磁场导向定位方法及实验研究[J].电子测量技术,2011,34(10):4-7.