关键词: 仪器类驱动器, 自动测试系统, 面向信号, 信号与测试定义, 可互换虚拟仪器, 组件对象模型

Abstract: Aiming at the problem of instrument interchangeability in Auto Test System（ATS），the Component Object Model（COM） technology is used to implement signal oriented instrument class driver reference to IEEE 1641 Signal and Test Definition（STD） standard and Interchangeable Virtual Instrument（IVI） class driver.The instrument class diver based on COM and signal is achieved，and it realizes the interchangeability between the same type instruments or the different type instruments which have the same capabilities，and also realizes the modeling description and control of different switches.An engineering application in airborne electronic equipments ATS shows that the driver decreases the ATS maintenance cost and shortens the upgrade time.

Key words: instrument class driver, automatic test system, signal oriented, Signal and Test Definition（STD）, Interchangeable Virtual Instrument（IVI）, Component Object Model（COM）