基于ECT的航空发动机滑油检测系统设计

摘要

The engine working condition can be reflected through testing and analysis of aircraft engine lubricating oil .An ECT ( electrical capacitance tomography ) detection system based on a Xilinx Spartan-6 FPGA chip was designed in this paper .DDRΠmemory and USB bus technology were utilized .At the same time application of digital orthogonal demodulation to replace analog demodulation can improve the demodulation real-time and accuracy of system .The simulation experiment show that the system pos-sesses the advantages of stability and reliablitiy ,high sampling accuracy and fast processing speed ,thus meeting needs in practical measurements .%通过检测分析飞机发动机滑油，能够反映发动机运行状态。文中设计基于Xilinx Spartan－6系列FPGA芯片的ECT（electrical capacitance tomography ）检测系统。采用DDRΠ存储器和USB总线技术，显著提高了数据传输的速度。同时应用数字正交解调代替模拟解调，有效提高了解调实时性和系统精度。仿真实验结果表明：该系统处理速度快、工作稳定、采样精度高，能满足实际测量需要。