【摘要】 本文介绍由8039单片机、4052双四通道模拟转换器、磁钢和探测线圈等组成的检测系统，控制四台检针仪。采用连续计时判别法，消除了漏判和降低了误判率，提高了检外仪检针的准确性。更多还原

【Abstract】 This paper described the testing system composed of 8039 single chip microcomputer, 4052 double 4 passages electrical switch, magnetic steels and testing coils etc,it controled four detecting needle equipments. This detecting system adopted continuous timing distinguishing, eliminated failure of detecting and decreased mistake in distinguishing. The method increased accuracy of the system.更多还原