空间滤波转速遥测中的旋转中心辨识

曾祥楷; 朱志雄; 陈阳; 刘全顺

doi:10.3788/OPE.20152307.1972

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空间滤波转速遥测中的旋转中心辨识

现代应用光学 | 更新时间：2020-08-12

- 空间滤波转速遥测中的旋转中心辨识
- Identification of rotational center in remote angular-velocity measurement with spatial filtering
- 光学精密工程 2015年23卷第7期页码：1972-1977
- 作者机构：
  
  重庆理工大学光电信息学院重庆,400054
- 作者简介：
- 基金信息：
  
  重庆理工大学研究生创新基金资助项目(No.YCX2014220)();重庆市时栅传感及先进检测技术重点实验室科研基金资助项目(No.2013TGS006)()
- DOI：10.3788/OPE.20152307.1972
  中图分类号： TP212.17;TH824
- 收稿日期：2015-01-28，
  
  修回日期：2015-03-30，
  
  纸质出版日期：2015-07-25
- 稿件说明：
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曾祥楷, 朱志雄, 陈阳等. 空间滤波转速遥测中的旋转中心辨识[J]. 光学精密工程, 2015,23(7): 1972-1977

ZENG Xiang-kai, ZHU Zhi-xiong, CHEN Yang etc. Identification of rotational center in remote angular-velocity measurement with spatial filtering[J]. Editorial Office of Optics and Precision Engineering, 2015,23(7): 1972-1977
曾祥楷, 朱志雄, 陈阳等. 空间滤波转速遥测中的旋转中心辨识[J]. 光学精密工程, 2015,23(7): 1972-1977 DOI： 10.3788/OPE.20152307.1972.

ZENG Xiang-kai, ZHU Zhi-xiong, CHEN Yang etc. Identification of rotational center in remote angular-velocity measurement with spatial filtering[J]. Editorial Office of Optics and Precision Engineering, 2015,23(7): 1972-1977 DOI： 10.3788/OPE.20152307.1972.

摘要

进行空间滤波转速遥测时

需要确定目标旋转中心所在的位置后才能判定转速的方向并计算转速的大小。本文根据光学空间滤波测速原理

提出了一种基于双差分空间滤波传感器的旋转中心判定法。用多个光电池构成含有两个差分空间滤波器的双差分空间滤波传感器

该传感器输出中心频率为

和

的两路准正弦信号;移动双差分空间滤波传感器

用移动前后的两组中心频率值计算出系数

;根据

的符号和

与

的相对大小即可判定旋转中心的位置区域。结果表明

0代表旋转中心的成像点

'在双差分空间滤波传感器的中间

0且

表示

'在双差分空间滤波器的下同侧

0且

表示

'在双差分空间滤波器的上同侧。该方法在转速相对平稳时能简单准确、远距离地辨识固体物旋转中心和气固液多相流涡旋中心的位置区域。

Abstract

To determine the direction of a rotational speed and to calculate the value of the rotational speed in remote angular-velocity measurement with the spatial filtering technique

it is necessary to exactly identify the location zone of measured-object rotation center. Therefore

a method of determining the rotation center based on Double Differential Spatial Filtering Sensor (DDSFS) was proposed according to the principle of spatial filtering velocimetry. The DDSFS constructed by multiple photovoltaic cells consists of two Differential Spatial Filters (DSFs)

which outputed two quasi-sinusoidal signals with the central frequencies of

and

. By moving the DDSFS

a coefficient

could be calculated by using two groups of central frequencies before and after moving the DDSFS. Then

the location zone of the rotational center could be distinguished depending on the sign of the coefficient

and the relative relation between

and

. The achieved results show that

0 represents the location zone of the imaged rotation center

' to be between DSF

and DSF

and that

0 with

indicates the location zone of the imaged rotation center

' to be below the DDSFS

and that

0 with

indicates

' to be above the DDSFS. The proposed method can be employed to determine the rotational center of solid body

and the location of whirling center in multiphase fluid with solid

liquid or gaseous substances when the rotation speed is relative stable.

关键词

Keywords

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