We have suggested the current-induced magnetic modulation spectroscopy (CIMMS) to detect human cardiopulmonary activity in sediment for lifesaving. Initially, a Finite Element (FE) model of human in sediment was developed to simulate impedance change by human cardiopulmonary activity and an optimal electrode arrangement was estimated to detect the activity at burial distance of 47 , 97 , and 147 mm. The estimated electrode arrangement was 427 mm apart for current injection and 305 mm apart for voltage difference detection. The impedance changes at burial distance of 47 mm, 97 mm and 147 mm were 0.0635%, 0.0432%, and 0.0278% caused by respiration and were 0.0006%, 0.0004%, and 0.0003% caused by pulsation, respectively. Secondly, cardiopulmonary activity of a normal male subject was measured with an electrode contactless electrical impedance spectroscopy (EIS) device using the estimated optimal electrode arrangement. Respiration and pulsation at the distance of 50 mm had shown good agreement between a medical equipment and impedance measurement device. However, the accuracy was worse significantly at the distance of 100 mm and 150 mm gradually. Finally, we calculated the sensitivity difference between EIS and CIMMS and concluded that it would be possible to detect human cardiopulmonary activity in sediment when we use the CIMMS.

中文翻译：

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基础研究，以验证使用电流感应磁调制光谱法检测沉积物中人心肺活动的可能性

我们建议使用电流感应磁调制光谱法（CIMMS）来检测沉积物中人的心肺活动以挽救生命。最初，开发了人类在沉积物中的有限元（FE）模型，以模拟人类心肺活动引起的阻抗变化，并估算了最佳电极布置以检测在47、97和147 mm的埋葬距离处的活动。估计的电极布置对于电流注入而言相距427 mm，对于电压差检测而言相距305 mm。埋入距离为47 mm，97 mm和147 mm时的阻抗变化分别是由于呼吸引起的0.0635％，0.0432％和0.0278％，以及由于脉动引起的0.0006％，0.0004％和0.0003％。第二，正常男性受试者的心肺活动是通过使用估计的最佳电极排列的无电极电极阻抗谱（EIS）设备进行的。在50 mm距离处的呼吸和脉动显示出医疗设备和阻抗测量设备之间的良好一致性。但是，在逐渐减小100mm和150mm的距离时，精度明显变差。最后，我们计算了EIS和CIMMS之间的灵敏度差异，并得出结论，使用CIMMS可以检测沉积物中的人心肺活动。逐渐地在100 mm和150 mm的距离处，精度显着变差。最后，我们计算了EIS和CIMMS之间的灵敏度差异，并得出结论，使用CIMMS可以检测沉积物中的人心肺活动。逐渐地在100 mm和150 mm的距离处，精度显着变差。最后，我们计算了EIS和CIMMS之间的灵敏度差异，并得出结论，使用CIMMS可以检测沉积物中的人心肺活动。