基于SPRT技术的温度／压力表综合试验器的设计  

Design of synthetic tester of temperature/pressure instruments based on SPRT technique

作　　者：孙百香[1] 

机构地区：[1]空军航空大学航空控制工程系,长春130022

出　　处：《电子测试》2008年第11期75-78,共4页Electronic Test

摘　　要：本文研制一种能快速检查不同飞机、各种型号的发动机排气温度表和压力表等100多个信号的温度/压力表综合试验器。该试验器采用PC104总线技术,实现了检测设备的综合化、数字化,它能取代几十个老式、相对独立的检测设备,与老式试验器相比维护效率提高了8倍以上。采用改进的Wald的序惯概率比法(SPRT)对温度表传感器的软故障进行检测,解决了飞机温度表传感器软故障无法检测的难题,使检测传感器的误警率从原来的5%下降到1%。This paper develops a synthetic tester of temperature/pressure instrument which can fast measure more than 100 signals in the different type of aircraft instruments such as exhaustgas thermometer and pressure gauge. Using PC104 bus technology, the tester realizes integration and digital of test equipments. As a result, decades of old and relatively independent test equipments are replaced. Maintenance efficiency increases by 8 times more than old type of tester. Improved Wald method of Sequential Probability Ratio Test （SPRT） can solve the problem of detecting the soft-failure of thermocouple and make PFA decrease from 5 %to 1%.

关 键 词：温度/压力表 试验器 PCI04总线 SPRT技术 

分 类 号：TH811[机械工程—仪器科学与技术] TH812[机械工程—精密仪器及机械]