Detection of Shape Manufacturing Defects of Flat Fan-Pattern Nozzle Orifices Using Elliptic Fourier Descriptors
Shape defects originating from the manufacture in the orifice openings of the flat fan-pattern nozzles may result in deteriorating the spray pattern. This study has been conducted with the aim of detecting the manufacturing defects of the fan-pattern nozzle orifices in terms of shape uniformity usin...
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Ankara University
2016-05-01
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| Series: | Journal of Agricultural Sciences |
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| author | Bahadır Sayıncı |
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| author_sort | Bahadır Sayıncı |
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| description | Shape defects originating from the manufacture in the orifice openings of the flat fan-pattern nozzles may result in deteriorating the spray pattern. This study has been conducted with the aim of detecting the manufacturing defects of the fan-pattern nozzle orifices in terms of shape uniformity using the elliptic Fourier descriptors EFDs , and revealing the shape differences among the nozzle orifices made in polyacetal for various nominal sizes ranging from 01 to 06. At first, descriptive data describing dimensions major and minor length, projected area, etc. and shapes shape factor, elongation and roundness of the nozzle orifices were obtained using an image processing method. The next process, to evaluate the nozzles’ orifice shape using elliptic Fourier analysis EFA , the progresses of generating the orifice’s contour data, derivation of EFDs, principal component analysis PCA of EFDs and visualization of shape variations estimated by the principal component scores PCs were followed respectively. Although the shape differences of the orifice outlines could be visually distinguished, the descriptive shape data were not able to discriminate the contour differences. The EFDs determined for each orifice size could individually detect the nozzle orifices with shape defect originating from the manufacture and they could be explicitly distinguished from the scatter plots. The results of the Hotelling’s pairwise comparison test showed that the nozzle orifices in shape were significantly different from each other. Linear discriminant analysis demonstrated that the group centroids of the orifices of 03, 04 and 06 were found close-range to each other. The orifice of 01 which is rectangular in shape had an extraordinary attribute compared to the other orifices. The orifice outline of 015 with a smooth shape was in appearance of an oblate ellipse in shape. The contour of the nozzle orifice of 02 size was explicitly found different from the others. It was concluded that the EF method can be used intended for the manufacturers inspect and improve the quality of nozzle orifices |
| format | Article |
| id | doaj-art-89f59f1630104a0398a21ddc5c845706 |
| institution | DOAJ |
| issn | 1300-7580 2148-9297 |
| language | English |
| publishDate | 2016-05-01 |
| publisher | Ankara University |
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| series | Journal of Agricultural Sciences |
| spelling | doaj-art-89f59f1630104a0398a21ddc5c8457062025-08-20T03:03:53ZengAnkara UniversityJournal of Agricultural Sciences1300-75802148-92972016-05-0122331733010.1501/Tarimbil_000000139045Detection of Shape Manufacturing Defects of Flat Fan-Pattern Nozzle Orifices Using Elliptic Fourier DescriptorsBahadır Sayıncı0Atatürk University, Faculty of Agriculture, Department of Agricultural Machinery and Technologies Engineering, Erzurum, TURKEYShape defects originating from the manufacture in the orifice openings of the flat fan-pattern nozzles may result in deteriorating the spray pattern. This study has been conducted with the aim of detecting the manufacturing defects of the fan-pattern nozzle orifices in terms of shape uniformity using the elliptic Fourier descriptors EFDs , and revealing the shape differences among the nozzle orifices made in polyacetal for various nominal sizes ranging from 01 to 06. At first, descriptive data describing dimensions major and minor length, projected area, etc. and shapes shape factor, elongation and roundness of the nozzle orifices were obtained using an image processing method. The next process, to evaluate the nozzles’ orifice shape using elliptic Fourier analysis EFA , the progresses of generating the orifice’s contour data, derivation of EFDs, principal component analysis PCA of EFDs and visualization of shape variations estimated by the principal component scores PCs were followed respectively. Although the shape differences of the orifice outlines could be visually distinguished, the descriptive shape data were not able to discriminate the contour differences. The EFDs determined for each orifice size could individually detect the nozzle orifices with shape defect originating from the manufacture and they could be explicitly distinguished from the scatter plots. The results of the Hotelling’s pairwise comparison test showed that the nozzle orifices in shape were significantly different from each other. Linear discriminant analysis demonstrated that the group centroids of the orifices of 03, 04 and 06 were found close-range to each other. The orifice of 01 which is rectangular in shape had an extraordinary attribute compared to the other orifices. The orifice outline of 015 with a smooth shape was in appearance of an oblate ellipse in shape. The contour of the nozzle orifice of 02 size was explicitly found different from the others. It was concluded that the EF method can be used intended for the manufacturers inspect and improve the quality of nozzle orificeshttps://dergipark.org.tr/tr/download/article-file/1569179image processingnominal sizeorifice contourorifice sizeshape analysisgörüntü işlemenominal ölçüorifis konturuorifis ölçüsüşekil analizi |
| spellingShingle | Bahadır Sayıncı Detection of Shape Manufacturing Defects of Flat Fan-Pattern Nozzle Orifices Using Elliptic Fourier Descriptors Journal of Agricultural Sciences image processing nominal size orifice contour orifice size shape analysis görüntü işleme nominal ölçü orifis konturu orifis ölçüsü şekil analizi |
| title | Detection of Shape Manufacturing Defects of Flat Fan-Pattern Nozzle Orifices Using Elliptic Fourier Descriptors |
| title_full | Detection of Shape Manufacturing Defects of Flat Fan-Pattern Nozzle Orifices Using Elliptic Fourier Descriptors |
| title_fullStr | Detection of Shape Manufacturing Defects of Flat Fan-Pattern Nozzle Orifices Using Elliptic Fourier Descriptors |
| title_full_unstemmed | Detection of Shape Manufacturing Defects of Flat Fan-Pattern Nozzle Orifices Using Elliptic Fourier Descriptors |
| title_short | Detection of Shape Manufacturing Defects of Flat Fan-Pattern Nozzle Orifices Using Elliptic Fourier Descriptors |
| title_sort | detection of shape manufacturing defects of flat fan pattern nozzle orifices using elliptic fourier descriptors |
| topic | image processing nominal size orifice contour orifice size shape analysis görüntü işleme nominal ölçü orifis konturu orifis ölçüsü şekil analizi |
| url | https://dergipark.org.tr/tr/download/article-file/1569179 |
| work_keys_str_mv | AT bahadırsayıncı detectionofshapemanufacturingdefectsofflatfanpatternnozzleorificesusingellipticfourierdescriptors |