摘要
提出将电阻层析成像(ERT)技术应用于水下冲压发动机气液两相流的空隙率参数测量,通过FPGA核心控制器,采用改进的双极性电流激励模式,优化数据采集单元设计实现了一套12电极高速ERT实时测量系统,测量范围可以达到10 kΩ,并研究了线性反投影算法进行图像重建。叙述了系统核心单元的工作原理,完成了优化后的12电极ERT系统设计。最后,通过实验验证优化后的ERT系统应用于模拟水下冲压发动机环境下场域内边界电压参数测量的可行性。实验结果表明,ERT系统实时测量速率达到51 fps,能够实时获得场域内的边界电压数值,可对模拟环境下的测试管道截面进行图像重建。
The electrical resistance tomography(ERT)technique is applied to the measurement of void fraction of gas-liquid two-phase flow in underwater ramjet.Through the FPGA core controller,the improved bipolar current excitation mode is adopted,and the data acquisition unit design is optimized to realize a set of 12 electrode ERT real-time measurement system,the measuring range is up to 10 kΩ,study the linear back projection algorithm for image reconstruction.The working principle of the system core unit is described,and the optimized 12 electrode ERT system design is completed.Finally,experiments are conducted to verify the feasibility of applying the optimized ERT system to the measurement of boundary voltage parameters in the field under simulated underwater ramjet environment.The experimental results show that the ERT system has a real-time measurement rate of 51 fps,can obtain the boundary voltage value in the field in real time,and can reconstruct the image of the test pipe section in the simulated environment.
作者
贡益明
孔德仁
商飞
Gong Yiming;Kong Deren;Shang Fei(College of Aeronautical Engineering,Jiangsu Aviation Technical College,Zhenjiang 212134,China;College of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China)
出处
《国外电子测量技术》
北大核心
2022年第7期173-178,共6页
Foreign Electronic Measurement Technology
基金
2022年度院级课题(JATC22010103)
国家自然科学基金(61401211)项目资助。
关键词
电阻层析成像
FPGA
电极传感器
双极性电流
空隙率
图像重建
electrical resistance tomography
FPGA
electrode sensor
bipolar current
void ratio
image reconstruction
