感应式磁声成像脉冲磁场的测量方法

Measurement of Pulsed Magnetic Field for Magnetoacoustic Tomography Technology with Magnetic Induction

阐述了利用电磁感应法测量脉冲磁场的磁感应强度,首先测量放置在标准的已知正弦波磁场里的探测线圈的线圈常数,再用这种已知线圈常数的探测线圈进行脉冲磁场的测量。介绍了微型磁场探测线圈的绕制和固定方法,设计了脉冲磁场的实际测量装置,给出了线圈平面的调整方法,利用该装置实际测量了感应式磁声成像系统中的脉冲磁场,并对测量结果进行了误差分析。

The measurement of magnetic induction intensity of pulsed magnetic field has been described with electromagnetic induction. At first, the coil constant of detection coil placed in the standard sine wave magnetic field was measured. Then the pulsed magnetic field was measured with the detection coil known coil constant. This paper introduces the wined and fixed way of the detecting coil for tiny magnetic field. The actual measure device of the pulsed magnetic fields has been designed. The adjustment method of loop surface has been given. The pulse magnetic field has been measured in magnetoacoustic tomography system with magnetic induction, and the error of actual measure results has been analyzed.