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介绍一种可对红外烟幕干扰特性进行定量测试的智能化测试仪器的设计方法，该系统采用微弱信号的数字化处理方案，可在野外环境超过２００ｍ的距离同时测量红外烟幕对１．０６μｍ，３～５μｍ，８～１２μｍ波段的干扰效果，测量精度优于１％，响应时间＜１ｓ。系统软件建立在Ｗｉｎｄｏｗｓ＇９５平台基础上，由图形化界面实现测试结果的显示与处理。
This paper introduces a design method of intelligent test instrument which can quantitatively test the interference characteristics of infrared smoke screen. The system uses the digital signal processing method of weak signal to measure the infrared smoke intensity of 1.06μm, 3 ~ 5μm, 8 ~ 12μm band interference effect, the measurement accuracy is better than 1%, the response time <1s. The system software is based on the Windows’95 platform, displaying and processing test results from a graphical interface.