...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>JSME International Journal. Series B, Fluids and Thermal Engineering >Three-Dimensional Flow Measurement by Digital Holographic Particle Image Velocimetry with Spatio-Temporal Derivative Method: Evaluation of the Measurement Accuracy by Numerical Simulation
【24h】

Three-Dimensional Flow Measurement by Digital Holographic Particle Image Velocimetry with Spatio-Temporal Derivative Method: Evaluation of the Measurement Accuracy by Numerical Simulation

机译：时空导数数字全息粒子测速仪进行三维流量测量：数值模拟评价测量精度

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In this paper, we present a digital holographic particle image velocimetry (DHPIV) technique with a spatio-temporal derivative method for velocity measurement in 3D space and the results of evaluating on its measurement accuracy. In this technique, hologram patterns are observed as digital images using an electronic camera, such as CCD or CMOS, and image reconstruction is carried out on a personal computer. Since an in-line observation system is utilized in conventional digital holography, a numerically reconstructed image is considerably enlarged in the depth direction and its depth resolution is extremely low; hence, the measurement accuracy in the depth direction is inaccurate in a digital holographic measurement. To overcome this difficulty, we apply a spatio-temporal derivative method to this technique for the detection of particle displacement along the z-axis. In a numerical simulation, measurement accuracy is evaluated for a multi particle model and a cubic cavity flow model. Furthermore, we examine the effect of noise on displacement measurement accuracy for numerically constructed noisy hologram patterns.
机译：在本文中，我们提出了一种采用时空导数法的3D空间速度测量数字全息粒子图像测速技术（DHPIV），并对其测量精度进行了评估。在该技术中，使用诸如CCD或CMOS的电子照相机将全息图图案观察为数字图像，并且在个人计算机上进行图像重建。由于在传统的数字全息术中使用了在线观察系统，因此在深度方向上数字重建的图像被大大放大，并且其深度分辨率非常低；因此，在数字全息测量中深度方向上的测量精度不准确。为了克服这个困难，我们将时空导数方法应用于该技术，以检测沿z轴的粒子位移。在数值模拟中，评估多颗粒模型和立方腔体流动模型的测量精度。此外，我们研究了噪声对数字构造的带噪全息图图案的位移测量精度的影响。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号