CAJ | 학술논문

核磁共振发射电流波形存在暂态响应和电流衰减,降低了发射波形质量,严重影响探测精度.结合国内外核磁共振找水仪发射机研制情况,给出了发射波形质量的评估参数,提出了针对核磁共振找水仪的暂态响应和电流衰减的数值计算方法,结合发射波形数值计算结果讨论了影响发射波形质量的仪器系统参数.基于吉林大学自主研制的核磁共振找水仪发射机的实测结果与计算推论一致.该发射波形质量评估及影响因素分析可为不同核磁共振找水仪发射机设计提供依据.
핵자공진발사전류파형존재잠태향응화전류쇠감,강저료발사파형질량,엄중영향탐측정도.결합국내외핵자공진조수의발사궤연제정황,급출료발사파형질량적평고삼수,제출료침대핵자공진조수의적잠태향응화전류쇠감적수치계산방법,결합발사파형수치계산결과토론료영향발사파형질량적의기계통삼수.기우길림대학자주연제적핵자공진조수의발사궤적실측결과여계산추론일치.해발사파형질량평고급영향인소분석가위불동핵자공진조수의발사궤설계제공의거.
The accuracy of MRS (Magnetic Resonance Sounding) exploration may be affected by emission current waveform quality decreasing. Transient response and current attenuation are the two main determinants of the waveform quality. The paper analyzes the MRS transmitters both native and abroad, gives out emission waveform quality evaluation parameters, proposes a calculation method for transmitting current waveform (both transient response and current attenuation) and discusses the instrument system parameters affecting waveform quality based on emission current calculation formulas. Experiments carried out with the MRS instrument developed by Jilin University verify the discussion above. The evaluation of emission waveform quality and the analysis of quality influence parameters can be used for different MRS transmitter designs.