一种新型叶尖定时信号高精度处理技术  

A New Accurate Processing Technique for Tip-timing Signal

作　　者：孙宇扬[1] 段发阶[1] 方志强[1] 叶声华[1] 

机构地区：[1]天津大学精密测试技术及仪器国家重点实验室,天津300072

出　　处：《传感技术学报》2003年第4期415-418,共4页Chinese Journal of Sensors and Actuators

摘　　要：提出一种新型叶尖定时信号高精度处理方法。采用固定频率脉冲填充方法 ,并基于CPLD、FIFO、EPP的融合技术 ,实现 10ns的叶尖定时分辩力。利用CPLD设计了 2 4位高速同步计数锁存电路 ,引入光通信用放大芯片设计了高灵敏度、宽频带光电接收预处理电路 ,并设计了高速EPP接口电路及软件。在实验室条件下对处理系统进行了功能验证 ,实验证明该系统可以实现 0 4A new accurate processing technique for tip-timing signal is proposed. The fixed frequency pulse filling method, and the combination of CPLD, FIFO and EPP are adopted to realize 10 ns tip-timing accuracy. CPLD is used for design 24 bit high-speed synchronized counter and latch circuit; the preamplifer and postamplifier are used for design high sensitivity, large bandwidth photoelectric receiver. In addition, EPP interface circuit and corresponding software design are provided. The processing system are proved under the laboratory condition, and the result of experiments indicate that the system can realize the detection of weak light as low as 0.4 μW.

关 键 词：旋转叶片 振动测量系统 叶尖定时 非接触测振技术 传感器 光电接收 数据处理 EPP 信号处理 

分 类 号：TH825[机械工程—仪器科学与技术] TN911.7[机械工程—精密仪器及机械]