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首页> 外文会议>2003 International Thermal Spray Conference Vol.2; May 5-8, 2003; Orlando, Florida, USA >Particle Temperature and Velocity Measurements by Two-Wavelength Streak Imaging
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Particle Temperature and Velocity Measurements by Two-Wavelength Streak Imaging

机译：通过两波长条纹成像测量颗粒温度和速度

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摘要

A two-wavelength particle imaging sensor has been developed to measure temperature and velocity of individual particles in most thermal spray devices. The sensor provides continuous updates to particle condition profiles, histograms and correlation's. The software locates particle streaks, determines the intensity ratio and dimensions of each streak, and calculates the particle temperature and velocity. Many forms of advanced materials processing technologies, such as thermal spray, spray-forming and atomization have considerable need of process control sensor technology. These measurements provide the basis for application of the sensor to many of these processes. Particle temperature and velocity measurements of plasma-sprayed ceramic powder were obtained using the sensor. The average temperature varied from 2800 K to 3000 K as the current to the plasma was increased from 700 amps to 900 amps. The average velocity varied from 85 m/s to 99 m/s over the same range. These results compare favorably with similar measurements, reported in the literature. With its full-stream field of view, the vision-based particle sensor can be applied to control strategies for the purpose of providing stable particle temperatures and velocities over long duration plasma spray processes.
机译：已开发出一种两波长粒子成像传感器，以测量大多数热喷涂设备中单个粒子的温度和速度。该传感器可连续更新颗粒状况，直方图和相关性。该软件可以定位颗粒条纹，确定每个条纹的强度比和尺寸，并计算颗粒温度和速度。许多形式的先进材料加工技术，例如热喷涂，喷涂成型和雾化，都非常需要过程控制传感器技术。这些测量为将传感器应用于许多此类过程提供了基础。使用传感器获得了等离子喷涂陶瓷粉末的颗粒温度和速度测量值。随着流向等离子体的电流从700安培增加到900安培，平均温度从2800 K到3000 K不等。在相同范围内，平均速度从85 m / s到99 m / s不等。这些结果与文献报道的类似测量结果相比具有优势。凭借其全方位的视野，基于视觉的粒子传感器可用于控制策略，以在长时间等离子体喷涂过程中提供稳定的粒子温度和速度。

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