【摘要】 基于人体心脏电场信号的生命探测仪是目前最先进的生命探测仪,其困难之处在于从地震废墟中提取微弱的心脏电场信号。本文主要分析地震废墟中可能出现的对人体电场有干扰的信号情况,提出如何接收废墟中微弱的超低频心脏电场信号,并根据人体心脏电场的特征设计特殊滤波器滤除干扰信号,只保留因人体心脏跳动而产生的360度扩展的超低频非均匀电场。更多还原

【Abstract】 The life detector based on the signal of cardiac electric field is now the most advanced life detector,but the difficulty is how to extract the weak signal of cardiac electric field effectively from earthquake ruins.In this paper the signal interference situation in earthquake disaster ruins that maybe affect human electric field is analyzed and the method of receiving weak ultra-low frequency electric filed signals in the ruins is put forward.According to the characteristics of human cardiac electric field,a special filters is designed for filtering off interference signals.Only the expansion 360° ultra-low-frequency non-uniform electric field which produced by beating human heart can be left.更多还原