Vector Doppler effect measurement method and device

A Doppler effect and measurement device technology, applied in the field of vector Doppler effect measurement, can solve the problems of discrimination, inability to realize the direction of object movement, and inability to realize real-time monitoring of the object's rotational movement state, so as to ensure integrity and compact device , Improve the effect of integration

Active Publication Date: 2019-12-31
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

At present, the measurement of the translational velocity of an object can be realized based on the linear Doppler effect, and the measurement of the rotat

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  • Vector Doppler effect measurement method and device
  • Vector Doppler effect measurement method and device
  • Vector Doppler effect measurement method and device

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specific Embodiment approach

[0049] Such as figure 2 As shown, a kind of improvement of a kind of vector Doppler effect measuring device provided by the present invention, the specific implementation is as follows:

[0050] The device includes: a polarization non-uniform distribution vector light source 1, a vector light field 2, a lateral moving object 3, a vector Doppler signal 4, a beam splitter 51, a first analyzer 52, a first detector 53, a second A polarizer 54 , a second detector 55 , and a signal processing module 56 . In this improved device, the specific generation method of the vector Doppler signal 4 is consistent with that of embodiment 1; the beam splitter 51 collects the vector Doppler signal 4 and divides it into two paths for measurement; one path of light passes through the first path in turn. The polarizer 52 fixes the polarization direction and is received by the first detector 53; the other path of light passes through the second analyzer 54 in turn to fix the polarization direction...

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Abstract

The invention discloses a vector Doppler effect measurement method and device. The method achieves the simultaneous measurement of the movement speed and direction of a transverse moving object through a polarization non-uniform distribution vector light field. The device comprises a polarization non-uniform distribution vector light source and a detection device, wherein the polarization non-uniform distribution vector light source is used for generating a transverse vector light field or a cylindrical vector light field, and the detection device is used for detecting vector Doppler signals obtained by sampling different spatial positions in the vector light field by the transverse moving object, so that the movement speed and direction of the transverse moving object are measured at thesame time. According to the invention, full-vector information of the moving speed and direction of the transverse moving object can be measured simultaneously, the method breaks through the limitation that the traditional scheme can only measure the speed of transverse moving object and cannot distinguish the direction, can also monitor the motion state of the object in real time, has wide application prospects in the aspects of optical measurement, sensing and the like, and fills up the blank in the related technical fields.

Description

technical field [0001] The invention belongs to the field of optical measurement, and more specifically relates to a vector Doppler effect measurement method and device. Background technique [0002] Since its discovery, the Doppler effect has been developed and perfected for more than 100 years, and has been widely used in the fields of optical and acoustic measurement, including speed measurement, radar, meteorological and astronomical observation, and biological diagnosis. The measurement technology developed based on the Doppler effect generally has the advantages of high spatial measurement resolution, wide measurement range, and non-contact, so it is an indispensable means in actual measurement occasions. The Doppler effect is caused by the relative motion between the wave source and the observer, which manifests itself as a frequency shift in the local oscillator frequency of the wave. Wherein, the form of relative motion can be divided into longitudinal translation ...

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Application Information

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IPC IPC(8): G01S13/58
CPCG01S13/58
Inventor 王健方良万镇宇
Owner HUAZHONG UNIV OF SCI & TECH
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