金屬探測器的原(yuan)理是(shi)電(dian)(dian)(dian)磁感應(ying)檢測到(dao)金屬(shu)，也叫渦流(liu)感應(ying)。它(ta)是(shi)由一組發(fa)射(she)線圈，兩組接受線圈組成。機器通電(dian)(dian)(dian)后(hou)，發(fa)生電(dian)(dian)(dian)磁感應(ying)，當金屬(shu)通過后(hou)，電(dian)(dian)(dian)磁感應(ying)發(fa)生電(dian)(dian)(dian)流(liu)信號，發(fa)射(she)圈把信號傳送到(dao)控制(zhi)箱(xiang)，控制(zhi)箱(xiang)感應(ying)發(fa)出報警(jing)剔(ti)除。