火箭推进

针对喷嘴雾化角测量,开展基于图像处理的喷嘴雾化角测量方法研究,设计搭建了采用远心透镜光学成像测量系统,研究基于图像灰度阈值分割、边缘识别和角度分析的图像处理算法,通过对喷雾图像进行处理得到雾化角与偏斜角。为验证系统测量精度,采用标准角度块进行测量,角度测量最大相对误差为1.01,测量不确定度优于0.10°。在此基础上,将上述光学成像测量系统应用于A、B、C这3种型号喷嘴雾化角测试,结果显示:该方法能够有效获得清晰的图像,利用阈值分割和边缘识别算法能够获得雾化角与偏斜角。A、B、C这3种典型单个喷嘴多次测试雾化角的测量不确定度分别为0.806°、0.279°、0.624°,偏斜角的测量不确定度为0.207°、0.402°、0.620°; A、B、C型不同喷嘴多次测试雾化角平均测量不确定度为0.659°、0.427°和1.291°,偏斜角平均测量不确定度平均值为0.389°、0.231°和0.487°。因此,基于图像处理的喷嘴雾化角测试方法可为评判喷嘴雾化性能提供直观有效依据。

Aiming at the measurement of nozzle atomization angle, the measurement method of nozzle atomization angle based on image processing is studied.A telecentric lens optical imaging measurement system is designed and built,and the image processing algorithm based on image gray threshold segmentation, edge recognition and angle analysis is studied.The atomization angle and deflection angle are obtained by processing the spray image.In order to verify the measurement accuracy of the system, the standard angle block is used for measurement.The maximum relative error of angle measurement is 1.01 and the measurement uncertainty is better than 0.10°.On this basis, this optical imaging measurement system is applied to the atomization angle test of A, B and C three types of nozzles.The results show that the method can effectively obtain clear images, and the atomization angle and deflection angle can be obtained by threshold segmentation and edge recognition algorithm.The measurement uncertainty of atomization angle for three typical single nozzles A, B and C is 0.806°, 0.279° and 0.624°,and the measurement uncertainty of deflection angle is 0.207°, 0.402° and 0.620°,respectively.The average measurement uncertainty of atomization angle for A, B and C nozzles is 0.659°, 0.427° and 1.291°, and the average measurement uncertainty of deflection angle is 0.389°, 0.231° and 0.487°, respectively.Therefore, the test method of nozzle atomization angle based on image processing can provide intuitive and effective basis for evaluating nozzle atomization performance.

引言
1 雾化角图像测量原理
2 标准角度图像测试验证
3 喷嘴雾化角图像测量与结果分析
4 结论

图1 雾化角图像处理典型实例<br/>Fig.1 Typical example of atomization angle image processing

图1 雾化角图像处理典型实例
Fig.1 Typical example of atomization angle image processing

图2 基于背光照亮模式的标准角度块标定系统<br/>Fig.2 Calibration system of standard angle block based on backlight illumination mode

图2 基于背光照亮模式的标准角度块标定系统
Fig.2 Calibration system of standard angle block based on backlight illumination mode

表1 标准角度块精度规格<br/>Tab.1 Accuracy specification of standard angle block

表1 标准角度块精度规格
Tab.1 Accuracy specification of standard angle block

图3 标准角度块图像处理结果<br/>Fig.3 Image processing results of standard angle block

图3 标准角度块图像处理结果
Fig.3 Image processing results of standard angle block

表2 标准角度块测量结果<br/>Tab.2 Test results of standard angle block

表2 标准角度块测量结果
Tab.2 Test results of standard angle block

图4 基于底光照亮模式的喷嘴雾化角测试系统<br/>Fig.4 Measurement system of nozzle atomization angle based on bottom light illumination mode

图4 基于底光照亮模式的喷嘴雾化角测试系统
Fig.4 Measurement system of nozzle atomization angle based on bottom light illumination mode

图5 3种不同型号喷嘴测试图像处理结果<br/>Fig.5 Test image processing results of three different types of nozzles

图5 3种不同型号喷嘴测试图像处理结果
Fig.5 Test image processing results of three different types of nozzles

表3 3种不同型号喷嘴雾化角和偏斜角数值<br/>Tab.3 Atomization angle and deflection angle of three different types of nozzles单位:(°)

表3 3种不同型号喷嘴雾化角和偏斜角数值
Tab.3 Atomization angle and deflection angle of three different types of nozzles单位:(°)

图6 A型典型喷嘴测试图像处理结果<br/>Fig.6 Image processing results of typical nozzle test of type A

图6 A型典型喷嘴测试图像处理结果
Fig.6 Image processing results of typical nozzle test of type A

图7 B型典型喷嘴测试图像处理结果<br/>Fig.7 Image processing results of typical nozzle test of type B

图7 B型典型喷嘴测试图像处理结果
Fig.7 Image processing results of typical nozzle test of type B

图8 C型典型喷嘴测试图像处理结果<br/>Fig.8 Image processing results of typical nozzle test of type C

图8 C型典型喷嘴测试图像处理结果
Fig.8 Image processing results of typical nozzle test of type C

表4 A型典型喷嘴雾化角和偏斜角测试结果<br/>Tab.4 Test results of atomization angle and deflection angle for typical type A nozzle 单位:(°)

表4 A型典型喷嘴雾化角和偏斜角测试结果
Tab.4 Test results of atomization angle and deflection angle for typical type A nozzle 单位:(°)

表5 B型典型喷嘴雾化角和偏斜角测试结果<br/>Tab.5 Test results of atomization angle and deflection angle for typical type B nozzle单位:(°)

表5 B型典型喷嘴雾化角和偏斜角测试结果
Tab.5 Test results of atomization angle and deflection angle for typical type B nozzle单位:(°)

表6 C型典型喷嘴雾化角和偏斜角测试结果<br/>Tab.6 Test results of atomization angle and deflection angle for typical type C nozzle单位:(°)

表6 C型典型喷嘴雾化角和偏斜角测试结果
Tab.6 Test results of atomization angle and deflection angle for typical type C nozzle单位:(°)

表7 3种单个典型喷嘴雾化角、偏斜角的平均值和不确定度<br/>Tab.7 Average values and uncertainties of atomization angle and deflection angle for three single typical nozzles

表7 3种单个典型喷嘴雾化角、偏斜角的平均值和不确定度
Tab.7 Average values and uncertainties of atomization angle and deflection angle for three single typical nozzles

表8 A型喷嘴测试结果<br/>Tab.8 Test results of type A nozzle 单位:(°)

表8 A型喷嘴测试结果
Tab.8 Test results of type A nozzle 单位:(°)

表9 B型喷嘴测试结果<br/>Tab.9 Test results of type B nozzle 单位:(°)

表9 B型喷嘴测试结果
Tab.9 Test results of type B nozzle 单位:(°)

表10 C型喷嘴测试结果<br/>Tab.10 Test results of type C nozzle 单位:(°)

表10 C型喷嘴测试结果
Tab.10 Test results of type C nozzle 单位:(°)

表11 3种喷嘴雾化角、偏斜角的平均值和不确定度平均值<br/>Tab.11 Average values of atomization angle and deflection angle and the average values of uncertainty for three types of nozzles

表11 3种喷嘴雾化角、偏斜角的平均值和不确定度平均值
Tab.11 Average values of atomization angle and deflection angle and the average values of uncertainty for three types of nozzles

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备注

引言

1 雾化角图像测量原理

2 标准角度图像测试验证

3 喷嘴雾化角图像测量与结果分析

4 结论

期刊信息