粒子图像测试实验中的图像采集控制方法  

Study on Image Acquisition and Control Method for PIV Experiment

作　　者：杜海[1,2] 孟娟[3] 李木国[1,2] 黄影[1] 

机构地区：[1]大连理工大学海岸和近海工程国家重点实验室,辽宁大连116024 [2]大连理工大学DUT-UWA海洋工程联合研究中心,辽宁大连116024 [3]大连海洋大学信息工程学院,辽宁大连116024

出　　处：《实验室研究与探索》2017年第4期11-15,共5页Research and Exploration In Laboratory

基　　金：国家自然科学基金项目(61202253);海岸和近海工程国家重点实验室青年学者创新基金(LY1613)

摘　　要：针对粒子图像测速(PIV)实验过程中的图像采集问题,基于现场可编门阵列(FPGA)技术提出一种适用于流场图像采集的控制方法。该方法根据PIV实验时的图像分辨率高、位宽大、传输速率高的特点进行了控制结构的优化设计:首先FPGA将配置信息发送给相机,然后在FPGA上产生用于相机、光源同步的触发控制信号,在FPGA内部进行图像信号的采集与传输。所提方法中,整个PIV数据的采集与控制均在一片FPGA芯片上进行,大大提高了系统的集成度,从而增强了系统的稳定性。最后,对所提的控制方法进行了验证分析。结果表明:所提方法可以有效地解决粒子图像的采集问题。In order Io solve the image acquisition problem on the particle image velocimetry （PIV） experiment, a fluid image acquisition and control method based on FPGA is presented in this paper. In the method, the PIV structure is optimized according to the particle image features such as higher image resolution, faster transmission and larger bit- wide. Firstly, the camera configure information is sent out by FPGA. And then, the sync signals are also produced on the same FPGA chip. Meanwhile, the image data signal is detected and sent to PC through PCI-Express bus by FPGA. The new image acquisition process which is designed in one FPGA chip can greatly improve the integration of the system. At last the acquisition method hased on FPGA is tested. The experimental results show that the proposed method is an effective method for particle image acquisition.

关 键 词：粒子图像测速 图像采集 同步控制 现场可编门阵列 

分 类 号：O353.5[理学—流体力学]