Method for measuring particle size of liquid drops sprayed by industrial nozzle
A measurement method and droplet technology, which is applied in the direction of measuring devices, particle size analysis, particle and sedimentation analysis, etc., can solve the problems of poor droplet accuracy, undetectable error of large radius, undetectable radius of small droplet, etc. , to achieve the effect of improving the accuracy and scope of application, and strong engineering applicability
Pending Publication Date: 2020-11-24
UNIV OF SCI & TECH BEIJING
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[0004] In the prior art, the radius of the droplet is generally calculated directly after processing the captured droplet image, which does not take into account the densely distributed area of the droplet, resulting in the error that a large radius droplet may not be detected when a small radius droplet is detected Or the radius of the small droplet cannot be detected when the radius of the large droplet is detected, resulting in poor accuracy of droplet measurement in the prior art
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[0039] The application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain related inventions, rather than to limit the invention. In addition, it should be noted that, for the convenience of description, only the parts related to the related invention are shown in the drawings.
[0040] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and embodiments.
[0041] The present invention aims to provide a method for measuring the particle size of droplets sprayed by industrial nozzles. The measurement process is as follows: figure 1 As shown, the method includes the following steps:
[0042] Step S1, use an industrial n...
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The invention provides a method for measuring the particle size of liquid drops sprayed by an industrial nozzle. The method comprises the following steps: uniformly spraying the liquid drops on a plane by using the industrial nozzle, shooting the liquid drops on the plane by using a camera to obtain a shot image I, and measuring the pixel number of a given measurement unit in the shot image I; segmenting the shot image I to obtain a liquid drop concentration region image Icut; performing top cap operation processing on the liquid drop concentration area image Icut to obtain a top cap image ITopHat; carrying out binarization processing on the top hat image ITopHat; and detecting all contours in the binarized image IThred to obtain a contour image IContours, and calculating the area arei ofa region contained in each contour in the contour image IContours so as to calculate the radius ri of the liquid drops. According to the method, the influence of too small droplet radius and too concentrated droplets on radius detection is considered, the defect of influence of top cap operation of image morphological processing on radius detection is also considered, the defect is solved in a layered mode, the liquid drop measurement accuracy is improved, and the liquid drop measurement application range is widened.
Description
technical field [0001] The invention relates to the technical field of industrial measurement, in particular to a method for measuring the particle size of droplets sprayed by industrial nozzles. Background technique [0002] Droplet size detection generally refers to judging the performance and commerciality of the injector by detecting the radius of the droplet and the number or percentage of the radius within each radius range. The particle size detection method of the liquid droplets sprayed by industrial nozzles is still immature, and there are few literatures mentioning this technology. droplet profile to obtain the desired particle size and analyze it. [0003] The particle size detection method has a strong particularity. The detection method suitable for a certain project may not be applicable in another project. For the particle size detection method of the liquid droplets sprayed by industrial nozzles, it is necessary to consider the extremely small particle radi...
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Login to View More IPC IPC(8): G06T7/00G06T7/11G06T7/13G06T7/136G06T7/155G06T7/62G06T7/90G01N15/02G06T5/30
CPCG06T7/0004G06T7/11G06T7/13G06T7/136G06T7/155G06T7/62G06T7/90G06T5/30G01N15/0227
Inventor 陈哲涵胡一平马小明
Owner UNIV OF SCI & TECH BEIJING