摘要
针对航空发动机滑油系统中金属屑末在线监测难、检测灵敏度低的现状,基于电磁感应原理,理论推导出了金属屑末通过传感器线圈引起的感应线圈输出电压的表达式,仿真分析了金属颗粒通过传感器时的输出电压,并通过相敏检波(Phase Sensitive Detection, PSD)技术对传感器感应线圈采集到的信号进行解调处理,以提高传感器的采集灵敏度。实验验证了在使用频率为80 kHz、幅值为±10 V的正弦激励信号对13 mm管径进行监测时,传感器对铁磁性金属颗粒的检测灵敏度为80μm,对非铁磁性金属颗粒的检测灵敏度为350μm;为感应式金属屑末传感器的设计提供了理论和技术支持,为航空发动机滑油系统中的金属屑末在线监测提供了技术保障。
In response to the difficulty of online monitoring and low detection sensitivity of metal debris in aeroengine oil system,based on the electromagnetic induction principle,the expression of the induction coil output voltage caused by the metal debris passing through the sensor coil is theoretically derived.The output voltage of metal debris passing through the sensor is simulated and analyzed,and the signal collected by the sensor induction coil is demodulated and processed by using phase sensitive detection(PSD)technology to improve the collection sensitivity of the sensor.The experiment verifies the detection sensitivity of 80μm for ferromagnetic metal debris and 350μm for non-ferromagnetic metal debris by the sensor when monitoring the 13 mm pipe diameter with a sinusoidal excitation signal with a frequency of 80 kHz and an amplitude of±10 V.It provides theoretical support and technical support for the design of inductive metal debris sensor,and provides technical support for online monitoring of metal debris in aeroengine lubricant oil system.
作者
武宪威
王冠
钱智
钱征华
李锟
李小剑
WU Xianwei;WANG Guan;QIAN Zhi;QIAN Zhenghua;LI Kun;LI Xiaojian(State Key Laboratory of Mechanics and Control of Mechanical Structures,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;China Gas Turbine Establishment,Mianyang 621000,China;AVIC Jincheng Nanjing Engineering Institute of Aircraft System,Nanjing 211106,China)
出处
《测控技术》
2024年第2期49-55,共7页
Measurement & Control Technology
基金
国防科工局财政稳定支持项目基金(GJCZ-0813-20)。
