叶尖定时旋转叶片振动测量新技术  

New Vibration Measurement Technique Based on Tip-Timing for Rotating Blades

作　　者：赵行明[1] 滕光蓉[1] 段发阶[2] 方志强[2] 

机构地区：[1]中国燃气涡轮研究院,四川成都610500 [2]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：《测控技术》2006年第3期13-15,共3页Measurement & Control Technology

摘　　要：设计了一套基于叶尖定时传感的旋转叶片振动测量系统。系统主要由光电传感系统、振动信号采集与预处理系统、叶片振动数据处理系统3部分组成。叶尖定时传感器采用单根光纤发射、多光纤接收的Y型结构,并用高性能专用集成芯片完成弱光信号的放大检测,使传感器信噪比大于500,信号带宽大于50 MHz。设计了基于PCI总线,并融合CPLD和DSP技术的高速叶尖定时信号实时采集与处理板卡;建立了同步共振条件下叶片振动的数据处理模型,实现了叶片振动的实时监测。A vibration measurement system based on tip-timing for rotating blades is designed. The system is composed of three subsystems： the optical sensor system, vibration signals collecting and preprocessing system, real-time data processing system. With the Y type structure of single fiber transmitting and fiber bundles receiving, the tip-timing sensor can realize detecting faint light signals by using high performance integrated chip. This design makes the SNR bigger than 500 and the bandwidth bigger than 50 MHz. In addition, the high-speed real-time collection and processing of tip-timing signals are realized with CPLD and DSP technique based on PCI bus; the blade synchronous vibration signals are monitored synchronously by means of modeling the data processing model. In the end, the principle of measurement has been validated on some big types of turbine engines.

关 键 词：叶尖定时 振动测量 光纤束 旋转叶片 

分 类 号：TP274[自动化与计算机技术—检测技术与自动化装置]