• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Conference on Signal and Data Processing of Small Targets 2002, Apr 2-4, 2002, Orlando, USA >Detecting and parameters determining moving objects by time averaging of coherent radiation intensity
【24h】

Detecting and parameters determining moving objects by time averaging of coherent radiation intensity

机译：通过对相干辐射强度进行时间平均来检测和确定运动物体的参数

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

A new method of detection and determination of parameters for weakly reflecting and transparent moving objects is proposed. The method makes use of the coherent radiation scattered from inhomogeneous background surrounding these objects. It is based on pulsed coherent illumination of the objects and the background by two separated coherent sources, registering for each source the intensity of radiation scattered back by the background, and determining the difference between the time-averaged intensity squared and the square of the time-averaged intensity for various averaging times. The method proposed enables one to detect weakly reflecting and transparent objects placed at an arbitrary distance and to determine coordinates, sizes, and velocities of these objects. The probability of object detection is calculated versus variation and correlation radius of the background inhomogeneities under the assumption that the scattered field has Gaussian statistics. The paper presents a fast 'shifting' algorithm of processing the signal received by means of the proposed method. The algorithm is based on illuminating the objects and the background by repeated pulses, storing the intensities of the reflected pulses and taking a time average of stored intensities squared and stored intensities in intervals between neighboring reflected pulses. Application of the proposed method for detecting clusters of weakly reflecting and transparent moving polluting particles in inhomogeneous environment and for determining position of clusters and concentration, average size, and average velocity of these particles is discussed.
机译：提出了一种检测和确定弱反射透明物体的参数的新方法。该方法利用了从围绕这些物体的不均匀背景散射的相干辐射。它基于两个分离的相干光源对对象和背景的脉冲相干照明，为每个源注册由背景散射回的辐射强度，并确定时间平均强度平方与时间平方之间的差各种平均时间的平均强度。所提出的方法使人们能够检测以任意距离放置的弱反射和透明物体，并确定这些物体的坐标，大小和速度。在散射场具有高斯统计的假设下，计算物体检测的概率与背景不均匀性的变化和相关半径之间的关系。本文提出了一种快速的“移位”算法来处理通过所提出的方法接收到的信号。该算法基于通过重复脉冲照亮物体和背景，存储反射脉冲的强度以及在相邻反射脉冲之间的间隔中对所存储强度的平方和所存储强度进行时间平均。讨论了所提出的方法在不均匀环境中检测弱反射和透明移动污染颗粒的团簇并确定簇的位置以及这些颗粒的浓度，平均大小和平均速度的应用。

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