Method for measuring speed of vacuum cold-spraying particles

A particle velocity and vacuum cooling technology, which is used in measuring devices, fluid velocity measurement, velocity/acceleration/impact measurement, etc., and can solve the problems of low precision and low efficiency of particle velocity measurement in vacuum cold spraying

Inactive Publication Date: 2015-02-04
XI'AN POLYTECHNIC UNIVERSITY
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for measuring the particle velocity of vacuum cold spraying, which solve

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  • Method for measuring speed of vacuum cold-spraying particles
  • Method for measuring speed of vacuum cold-spraying particles
  • Method for measuring speed of vacuum cold-spraying particles

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Embodiment Construction

[0061] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0062] Such as figure 1 As shown, the structure of the measuring device for vacuum cold spraying particle velocity of the present invention includes a laser emitter 1, a substrate 2, a spraying device 4, an aperture stop 5, a doublet lens group 6, a modulation window stop 7, an optical fiber 8, a photoelectric Converter 9, hardware acquisition card 10, computer 11, wherein, doublet lens group 6 is placed in the inside of aperture diaphragm 5, modulation window diaphragm 7 is connected with optical fiber 8 on the right side of aperture diaphragm 5, modulates window light Diaphragm 7 forms a modulation window diaphragm ideal image plane 3 behind the doublet lens group 6, the modulation window diaphragm ideal image plane 3 is on the focal plane of the doublet lens group, and the laser transmitter 1 is on the modulation window diaphragm ideal ima...

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Abstract

The invention discloses a method for measuring speed of vacuum cold-spraying particles. The method comprises the following steps: firstly, collecting a voltage signal generated when the vacuum cold-spraying particles fly by using a hardware collecting card; then, storing the collected particle voltage signal to a computer by way of memory mapping; and finally analyzing and calculating the speed of the vacuum cold-spraying particles, namely firstly, filtering the particle voltage signal, then, intercepting an effective particle waveform by virtue of a rectangular function and fitting the particle waveform by virtue of a least square method, and finally, carrying out waveform calculation after analytic fitting to obtain the speed of the vacuum cold-spraying particles. The method for measuring the speed of the vacuum cold-spraying particles disclosed by the invention integrates parameter collection and data analysis and collects, displays and analyzes the particle waveform data in real time, so that the work efficiency of a researcher is improved and particle parameter collection has continuity. In addition, when the particle signal data are analyzed in real time, clutters in the particle signal can be filtered, so that the accuracy of particle speed detection is improved.

Description

technical field [0001] The invention belongs to the technical field of vacuum cold spraying, in particular to a method for measuring the velocity of vacuum cold spraying particles. Background technique [0002] Vacuum cold spray (Vacuum Cold Spray) technology is a new type of nano-ceramic particle coating preparation technology, the main principle is at room temperature and vacuum conditions, through high-pressure mixed gas (mainly N 2 , He and air) accelerate the ultrafine solid ceramic powder particles to hit the substrate at a certain speed, so as to realize the preparation of the substrate coating. The micro-particle air flotation deposition method born in the 1980s is the predecessor of vacuum cold spraying technology. This technology is called Aerosol Deposition Method in Japan and Nano-Particle Deposition System in Korea. Professor Akedo of Japan Advanced Industrial Science and Technology Research Institute conducted research on vacuum cold spraying technology and p...

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Application Information

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IPC IPC(8): G01P5/26
Inventor 毋涛潘晓慧张卫军汪子涵张帆何科训
Owner XI'AN POLYTECHNIC UNIVERSITY
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