基于数字图像处理的微火焰测量技术

Measurement of micro-scale flame based on digital image processing

为了提高微小火焰间接测量的准确性,根据灰度值和火焰温度的线性简化关系,利用数字图像处理软件Matlab对火焰图像进行灰度提取,间接获得火焰高度数据。测量结果表明:所测火焰高度数据准确,和实验结果吻合,用这种方法获取数据是可行的,而且方便简明。

During the micro-scale combustion experiment, it is necessary to measure the temperature of the whole combustion area to get the flame height data using thermocouple temperature measurement method. Due to the small micro-flame combustion area, the thermocouple may disturb the combustion stability. To solve the problem, digital image processing method is used to analyze flame image based on the linear relationship between image grey values and flame temperature to get the flame height data indirectly. Results show that the flame height data is accurate and agrees with the experiment result. This indirect measurement method for micro-flame is simple and feasible.