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A method for detecting the moving speed of the compound motion of an object

A compound motion and motion speed technology, applied in the direction of linear/angular velocity measurement, devices using optical methods, speed/acceleration/impact measurement, etc., can solve problems such as the inability to detect compound motion speeds, and achieve easy operation and application, wear The effect of strong penetration and simple detection device

Active Publication Date: 2022-07-01
XIDIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing detection methods of linear objects in space can only detect the linear motion velocity of the object, but in reality, the motion of many objects is composed of linear motion and rotational motion, so it is impossible to detect the composite motion speed

Method used

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  • A method for detecting the moving speed of the compound motion of an object
  • A method for detecting the moving speed of the compound motion of an object
  • A method for detecting the moving speed of the compound motion of an object

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] See figure 1 , a method for detecting the motion speed of the compound motion of an object, comprising:

[0048] Step 11: The optical grafting device irradiates the grafted vortex beam on the object to be measured.

[0049] Among them, the grafted vortex beam is composed of two half-ring vortex beams with the same loop radius and different topological charges; the object to be measured performs compound motion in the orthographic projection of the grafted vortex beam.

[0050] Step 12: The photomultiplier tube receives the echo signal reflected by the measured object.

[0051] Step 13: The spectrum analyzer performs Fourier transform on the echo signal to obtain the Doppler spectrum of the echo signal. In this step, the echo signal converted by the photomultiplier tube is input into the spectrum analyzer, and the spectrum analyzer performs Fourier transform to obtain the Doppler spectrum of the echo signal.

[0052] Step 14: The background terminal determines the lin...

Embodiment 2

[0055] A method for detecting the motion speed of compound motion of an object, comprising:

[0056] Step 21: The optical grafting device irradiates the grafted vortex beam on the object to be measured.

[0057] Among them, the grafted vortex beam is composed of two half-ring vortex beams with the same loop radius and different topological charges; the object to be measured performs compound motion in the orthographic projection of the grafted vortex beam.

[0058] Step 22: The photomultiplier tube receives the echo signal reflected by the measured object.

[0059] Step 23: The spectrum analyzer performs Fourier transform on the echo signal to obtain the Doppler spectrum of the echo signal. In this step, the echo signal converted by the photomultiplier tube is input into the spectrum analyzer, and the spectrum analyzer performs Fourier transform to obtain the Doppler spectrum of the echo signal.

[0060] Step 24, the background terminal determines the first composite frequency...

Embodiment 3

[0065] like figure 2 and image 3 As shown, a method for detecting the movement speed of compound motion of an object includes:

[0066] Step 31: The optical grafting device irradiates the grafted vortex beam on the object to be measured.

[0067] Among them, the grafted vortex beam is composed of two half-ring vortex beams with the same loop radius and different topological charges; the object to be measured performs compound motion in the orthographic projection of the grafted vortex beam.

[0068] Step 32: The photomultiplier tube receives the echo signal reflected by the measured object.

[0069] Step 33: The spectrum analyzer performs Fourier transform on the echo signal to obtain the Doppler spectrum of the echo signal. In this step, the echo signal converted by the photomultiplier tube is input into the spectrum analyzer, and the spectrum analyzer performs Fourier transform to obtain the Doppler spectrum of the echo signal.

[0070] Step 34: The background terminal...

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Abstract

The invention discloses a method for detecting the moving speed of compound motion of an object, comprising: an optical grafting device irradiates a grafted vortex beam on a measured object; wherein, the grafted vortex beam is two loops with the same radius and a topological charge number. The composition of different half-ring vortex beams; the object under test performs compound motion in the orthographic spot of the grafted vortex beam; the photomultiplier tube receives the echo signal reflected by the object under test; the spectrum analyzer performs Fourier transformation on the echo signal Transform to obtain the Doppler spectrum of the echo signal; the background terminal determines the linear velocity and rotational angular velocity of the measured object according to the Doppler spectrum of the echo signal. The invention utilizes the difference in response of vortex light with different topological charge numbers to the rotational motion and linear motion of the measured target, decouples the compound motion, and is suitable for the detection of linear motion, rotational motion and compound motion targets.

Description

technical field [0001] The invention belongs to the technical field of object motion direction identification and detection, and in particular relates to a method for detecting the motion speed of compound motion of an object. Background technique [0002] Vortex beam is a special kind of beam, its continuous annular light intensity distribution and continuous spiral wavefront structure make it have orbital angular momentum, different from Gaussian beam, its light intensity distribution is a dark hollow structure, and the central light intensity is zero. , and with the increase of the topological charge, the radius of the central dark area of ​​the halo is larger, and the radius of the light spot also increases. The helical structure of vortex light also makes it have orbital angular momentum, and it is this characteristic that greatly improves the stability in the detection of underwater turbulence. Therefore, vortex light can not only support high-density storage and trans...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01P3/36
CPCG01P3/363
Inventor 鲁振中郭蓉孙艳玲郭亮廖家莉马琳韩彪
Owner XIDIAN UNIV
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