Relevant bibliographies by topics / Deep Engraving

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  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Deep Engraving'

Author: Grafiati
Published: 4 June 2021
Last updated: 16 February 2022

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Journal articles on the topic "Deep Engraving"

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Pallarés-Aldeiturriaga, David, Pierre Claudel, Julien Granier, Julien Travers, Lionel Guillermin, Marc-Olivier Flaissier, Patrick Beaure d’Augeres, and Xxx Sedao. "Femtosecond Laser Engraving of Deep Patterns in Steel and Sapphire." Micromachines 12, no. 7 (July 7, 2021): 804. http://dx.doi.org/10.3390/mi12070804.

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Femtosecond laser engraving offers appealing advantages compared to regular laser engraving such as higher precision and versatility. In particular, the inscription of deep patterns exhibits an increasing interest in industry. In this work, an optimization protocol based on constraining overlap ratio and scan number is demonstrated. The proposed method allows changing overlap ratio while maintaining depth in the same range, which reduces the sampling number. This study WAS applied to stainless steel 316 L and sapphire for engravings deeper than 100 μm. Results exhibit overall depths higher than threshold values and allowed to determine optimized engraving quality, for instance, roughness in steel can be reduced while maintaining depth and taper angle by reducing overlap ratio. The optimized laser parameters such as roughness and taper angle factors for sapphire were also found to be as follows: 200 kHz, 86% overlap and 12 J/cm2. As a demonstration, a logo engraving is illustrated at the end.
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Zhang, Jing, Zhenhao Li, Ruqian Hao, Xiangzhou Wang, Xiaohui Du, Boyun Yan, Guangming Ni, Juanxiu Liu, Lin Liu, and Yong Liu. "Classification of Microscopic Laser Engraving Surface Defect Images Based on Transfer Learning Method." Electronics 10, no. 16 (August 18, 2021): 1993. http://dx.doi.org/10.3390/electronics10161993.

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Microscopic laser engraving surface defect classification plays an important role in the industrial quality inspection field. The key challenges of accurate surface defect classification are the complete description of the defect and the correct distinction into categories in the feature space. Traditional classification methods focus on the terms of feature extraction and independent classification; therefore, feed handcrafted features may result in useful feature loss. In recent years, convolutional neural networks (CNNs) have achieved excellent results in image classification tasks with the development of deep learning. Deep convolutional networks integrate feature extraction and classification into self-learning, but require large datasets. The training datasets for microscopic laser engraving image classification are small; therefore, we used pre-trained CNN models and applied two fine-tuning strategies. Transfer learning proved to perform well even on small future datasets. The proposed method was evaluated on the datasets consisting of 1986 laser engraving images captured by a metallographic microscope and annotated by experienced staff. Because handcrafted features were not used, our method is more robust and achieves better results than traditional classification methods. Under five-fold-validation, the average accuracy of the best model based on DenseNet121 is 96.72%.
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Mondal, Soumen, and Ajoy Kumar Dutta. "Technical study of the effect of laser engraving using uArm swift pro robot." IAES International Journal of Robotics and Automation (IJRA) 10, no. 3 (September 1, 2021): 182. http://dx.doi.org/10.11591/ijra.v10i3.pp182-191.

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<p>Laser engraving is the most non - traditional and efficient working method in the machining of materials of different geometry as compared to conventional methods. The main objective of this study is to determine the impact of uArm swift pro robot operated laser engraving process on a wooden pitch board piece. However, the robot was connected with uArm Studio 1.1.22 software to perform laser engraving operation. For this purpose the effect of process parameters like spot diameter and depth of penetration were investigated with different working length of the robot end effector, measured from wooden pitch board base. Experimental observation method was used to investigate the formation of deep and light engraving pattern on the pitch board surface by measuring penetration depth and spot diameter in suitable condition. The result obtained from the experiment and statistical parameters showed a new dimension to find a suitable working length of the robot assisted laser nozzle where the laser penetration effect was clearly perceptible for the wooden material.</p>
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Zhang, Ye, Qiu Xie, and Canlin Zhang. "Key Algorithms for Segmentation of Copperplate Printing Image Based on Deep Learning." Mobile Information Systems 2021 (May 25, 2021): 1–10. http://dx.doi.org/10.1155/2021/9940801.

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As a branch of the field of machine learning, deep learning technology is abrupt in various computer vision tasks with its powerful functional learning functions. The deep learning method can extract the required features from the original data and dynamically adjust and update the parameters of the neural network through the backpropagation algorithm so as to achieve the purpose of automatically learning features. Compared with the method of extracting features manually, the recognition accuracy is improved, and it can be used for the segmentation of copperplate printing images. This article mainly introduces the research on the key algorithm of the copperplate printing image segmentation based on deep learning and intends to provide some ideas and directions for improving the copperplate printing image segmentation technology. This paper introduces the related principles, watershed algorithm, and guided filtering algorithm of copperplate printing image synthesis process and establishes an image segmentation model. As a result, a deep learning-based optimization algorithm mechanism for the segmentation of copper engraving printing images is proposed, and experimental steps such as main color extraction in the segmentation of copper engraving printing images, adaptive main color extraction based on fuzzy set 2, and main color extraction based on fuzzy set 2 are proposed. Experimental results show that the average processing time of each image segmentation model in this paper is 0.39 seconds, which is relatively short.
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Mohammed, Wlla M. "Improvement the efficiency of SnO2/n-Si detector by engraving method using a CNC machine." Iraqi Journal of Physics (IJP) 17, no. 41 (May 29, 2019): 51–57. http://dx.doi.org/10.30723/ijp.v17i41.458.

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Tin oxide was deposited by using vacuum thermal method on silicon wafer engraved by Computer Numerical Controlled (CNC) Machine. The inscription was engraved by diamond-made brine. Deep 0.05 mm in the form of concentric squares. Electrical results in the dark were shown high value of forward current and the high value of the detection factor from 6.42 before engraving to 10.41 after engraving. (I-V) characters in illumination with powers (50, 100, 150, 200, 250) mW/cm2 show Improved properties of the detector, Especially at power (150, 200, 250) mW/cm2. Response improved in rise time from 2.4 μs to 0.72 μs and time of inactivity improved 515.2 μs to 44.2 μs. Sensitivity angle increased at zone from 40o to 65o.
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Hubeatir, K. A., M. M. AL-Kafaji, and H. J. Omran. "Deep Engraving Process Of PMMA Using CO2 Laser Complemented By Taguchi Method." IOP Conference Series: Materials Science and Engineering 454 (December 12, 2018): 012068. http://dx.doi.org/10.1088/1757-899x/454/1/012068.

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Kasman, Ş., and İ. E. Saklakoğlu. "Experimental Investigation and Mathematical Modeling of Laser Deep Engraving Process for Microapplication." Arabian Journal for Science and Engineering 38, no. 6 (February 21, 2013): 1539–49. http://dx.doi.org/10.1007/s13369-013-0561-x.

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Zhang Xiaopeng, 张晓鹏, 张晓兵 Zhang Xiaobing, and 陈新松 Chen Xinsong. "The Research of High-Speed and Deep Laser Engraving on Pressure Container Surface." APPLIED LASER 32, no. 4 (2012): 294–98. http://dx.doi.org/10.3788/al20123204.294.

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Brown, Beverly Louise. "Troubled Waters: Marcantonio Raimondi and Dürers Nightmares on the Shore." Bulletin of the John Rylands Library 92, no. 2 (September 2016): 25–43. http://dx.doi.org/10.7227/bjrl.92.2.4.

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Marcantonio Raimondis Il Sogno and Albrecht Dürers Sea Monster share a number of compositional similarities as well as a fascination with the bizarre. The association of monstrous forms as an omen of grave misfortune, including pestilence and war, was particularly common at the beginning of the sixteenth century. In Marcantonios engraving the chimeric monsters, billowing inferno and shooting star can be perceived as a graphic warning that by 1509 Venices world was in deep peril.
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Rosenstock, Dirk, Eric Thore Segebade, and Gerhard Hirt. "First Experimental and Numerical Study on the Use of Sheet Metal Die Covers for Wear Protection in Closed-Die Forging." Key Engineering Materials 651-653 (July 2015): 266–71. http://dx.doi.org/10.4028/www.scientific.net/kem.651-653.266.

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To reduce the failure of dies by abrasive wear, mechanical fatigue and thermal fatigue in closed-die forging usually measures like nitriding, deposition of ceramic layers by Physical Vapour Deposition (PVD), Chemical Vapour Deposition (CVD) or deposition welding are used. However, after some time wear appears and the dies have to be replaced. A new concept implements sheet metal die covers, which are placed on the die engraving during forging and will absorb abrasive wear, thermal and mechanical load. The inexpensive cover will be replaced quickly by a new one after it is worn-out. This concept is regarded in a first numerical and experimental study by comparing a covered die (C) and an uncovered die (U) for the production of the same part. A one-time use of the die cover showed a reduction of the peak temperature by 140 K and of the temperature amplitude by 37 %. The temperature reduction and the increase of inner radii of the engraving to fit the 1mm thick die cover doubled the expected die life time. The experiment showed that the soft deep drawing steel DC04 is not suitable in the current case for a die cover and a higher strength sheet metal should be applied.
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Dissertations / Theses on the topic "Deep Engraving"

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Bui, Thi Thanh Huyen. "Terminaisons verticales de jonction remplies avec des couches diélectriques isolantes pour des application haute tension utilisant des composants grand-gap de forte puissance." Thesis, Lyon, 2018. http://www.theses.fr/2018LYSEI061/document.

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Le développement de l’énergie renouvelable loin des zones urbaines demande le transport d'une grande quantité d’énergie sur de longues distances. Le transport d’électricité en courant continu haute tension (HVDC) présente beaucoup d’avantages par rapport à celui en courant alternatif. Dans ce contexte il est nécessaire de développer des convertisseurs de puissance constitués par des composants électroniques très haute tension, 10 à 30 kV. Si les composants en silicium ne peuvent pas atteindre ces objectifs, le carbure de silicium (SiC) se positionne comme un matériau semiconducteur alternatif prometteur. Pour supporter des tensions élevées, une région de "drift", relativement large et peu dopée constitue le cœur du composant de puissance. En pratique l’obtention d’une tension de blocage effective dépend de plusieurs facteurs et surtout de la conception d'une terminaison de jonction adaptée. Cette thèse présente une méthode pour améliorer la tenue en tension des composants en SiC basée sur l’utilisation des terminaisons de jonctions : Deep Trench Termination. Cette méthode utilise une tranchée gravée profonde en périphérie du composant, remplie avec un matériau diélectrique pour supporter l'étalement des lignes équipotentielles. La conception de la diode avec cette terminaison a été faite par simulation TCAD, avec deux niveaux de tension 3 et 20 kV. Les travaux ont pris en compte les caractéristiques du matériau, les charges à l’interface de la tranchée et les limites technologiques pour la fabrication. Ce travail a abouti sur la fabrication de démonstrateurs et leur caractérisation pour valider notre conception. Lors de la réalisation de ces structures, la gravure plasma du SiC a été optimisée dans un bâti ICP de manière à obtenir une vitesse de gravure élevée et en conservant une qualité électronique de l'état des surfaces gravées. Cette qualité est confirmée par les résultats de caractérisation obtenus avec des tenues en tension proches de celle idéale
The development of renewable energy away from urban areas requires the transmission of a large amount of energy over long distances. High Voltage Direct Current (HVDC) power transmission has many advantages over AC power transmission. In this context, it is necessary to develop power converters based on high voltage power electronic components, 10 to 30 kV. If silicon components cannot achieve these objectives, silicon carbide (SiC) is positioned as a promising alternative semiconductor material. To support high voltages, a drift region, relatively wide and lightly doped is the heart of the power component. In practice obtaining an effective blocking voltage depends on several factors and especially the design of a suitable junction termination. This thesis presents a method to improve the voltage withstand of SiC components based on the use of junction terminations: Deep Trench Termination. This method uses a trench deep etching around the periphery of the component, filled with a dielectric material to support the spreading of the equipotential lines. The design of the diode with this termination was done by TCAD simulation, with two voltage levels 3 and 20 kV. The work took into account the characteristics of the material, the interface charge of the trench and the technological limits for the fabrication. This work resulted in the fabrication of demonstrators and their characterization to validate the design. During the production of these structures, plasma etching of SiC has been optimized in an ICP reactor so as to obtain a high etching rate and maintaining an electronic quality of the state of etched surfaces. This quality is confirmed by the results of characterization obtained with blocking voltage close to the ideal one
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Book chapters on the topic "Deep Engraving"

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Tally, Justine. "Return of the Repressed: The Politics of Engraving and Erasure and the Quest for Selfhood in God Help the Child." In New Critical Essays on Toni Morrison's God Help the Child, 123–39. University Press of Mississippi, 2020. http://dx.doi.org/10.14325/mississippi/9781496828873.003.0008.

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God Help the Child strikingly calls to a re-envisioning of Morrison’s first novel, The Bluest Eye, in its emphasis on the superficial nature of beauty as skin-deep, two compelling and interrelated aspects that consistently reveal themselves throughout the text. The first picks up on Beloved’s concern with how much memory is beneficial to the human psyche, and how the politics of “engraving” that memory runs the risk of becoming a form of erasure of the self. The second is the author’s insistence on a sense of self-worth as something to be achieved through generosity, not through self-centeredness. In this novel no matter what trauma has occurred in the lives of the children, whether within or without the family, it is incumbent upon the affected as adults to get beyond that affliction and move toward an affirmation of an “other” in order to gain a personal sense of self.
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Martins, Andrea, César Neves, José M. Arnaud, and Mariana Diniz. "Os motivos zoomórficos representados nas placas de tear de Vila Nova de São Pedro (Azambuja, Portugal)." In Arqueologia em Portugal 2020 - Estado da Questão - Textos, 551–70. Associação dos Arqueólogos Portugueses e CITCEM, 2020. http://dx.doi.org/10.21747/978-989-8970-25-1/arqa43.

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From the excavations carried out between 1936 and 1967 in the Chalcolithic settlement of Vila Nova de São Pedro (Azambuja, Portugal), there were recovered more than 500 ceramic elements usually known as “loom weights” with different shapes, dimensions and, in the majority, with decorated surfaces. The iconographic repertoire is quite diverse, with the geometric motifs in higher representation, followed by soliforms, anthropomorphic and zoomorphic motifs. For the zoomorphic motifs there were identified eleven decorated surfaces, whose typology is split into two categories: quadruped – whose species are not identifiable; deer representations. These iconographic motifs are part of the symbolic and conceptual universe of Iberian communities from the 3rd Millennium BC, also appearing in several artifactual categories such as ceramics, figurines, plates, engravings and rock art paintings. Understanding the mechanisms that create and increase this thematic uniformity, as well as the meaning of the deer for these agro pastoral groups, will allow a closer approach to the cultural and social behavior of these communities.
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Lorblanchet, Michel. "The Horse in the Palaeolithic Parietal Art of the Quercy: Outline of a Stylistic Study." In Palaeolithic Cave Art at Creswell Crags in European Context. Oxford University Press, 2007. http://dx.doi.org/10.1093/oso/9780199299171.003.0016.

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The discovery of the engravings at Church Hole brings numerous and precious newelements that renew our knowledge of Palaeolithic parietal art. In particular, it poses the problem of styles in the closing phase of the Palaeolithic. As a comparison, I will present here an outline of the evolution of styles in the Palaeolithic parietal art of the Quercy between about 27,000–28,000 and 12,000–13,000 years ago. In order to clearly highlight the value of such an evolution, I shall begin by comparing various horse figures, since these are the dominant subjects in all phases of this long period. I shall start by comparing the equids of the cave of Roucadour with those (likewise unpublished) of the cave of Combe Nègre 1 (Lot), and then those of the caves of Sainte-Eulalie and Pergouset (Lot), and I shall end by recalling the characteristics of the horses of Pestillac and Lagrave which illustrate the end of the parietal Magdalenian in our region. I will make one last comparison with the portable art of the abri Murat (Lot) which yielded horse depictions in an azilian level. The cave of Roucadour, vast and of easy access, is in the northern part of the Causse de Gramat (Lot). Its total length is about 300 m, and it constituted a very attractive site for man during a large part of prehistory. During the neolithic and protohistory, a habitation (excavated by A. Niederlender and then by J. Gasco) was installed in front of the cave entrance. The deep galleries were also used in the same period, since quantities of pottery, burials, and bronze objects were discovered there. In 1962, two speleologists, Pierre Taurisson and Jean Paul Coussy, discovered parietal paintings and engravings in a lateral gallery. The cave was classed as a historical monument in 1964. The study and recording of the engravings were entrusted to the abbé André Glory, assisted by his collaborator, the abbé Jean-Louis Villeveygoux; the discoverers themselves also seem to have lent their help at the start. André Glory, who was then an engineer in the CNRS, had just finished tracing the decoration of Lascaux. He carried out four campaigns of recording at Roucadour from 1964 to 1965 (Glory 1964, 1966). A tragic road accident in 1966 cost him and his assistant their lives.
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Conference papers on the topic "Deep Engraving"

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Kasman, Şefika, İ Etem Saklakoğlu, Francisco Chinesta, Yvan Chastel, and Mohamed El Mansori. "Investigation of Laser Deep Engraving Process: A Case Study for Surface Roughness and Engraving Depth." In INTERNATIONAL CONFERENCE ON ADVANCES IN MATERIALS AND PROCESSING TECHNOLOGIES (AMPT2010). AIP, 2011. http://dx.doi.org/10.1063/1.3552415.

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Faucon, M., G. Mincuzzi, F. Morin, C. Hönninger, E. Mottay, and R. Kling. "Metal deep engraving with high average power femtosecond lasers." In SPIE LASE, edited by Udo Klotzbach, Kunihiko Washio, and Craig B. Arnold. SPIE, 2015. http://dx.doi.org/10.1117/12.2078915.

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Du, Jie, and Tong Li. "The Establishment of Color Proportion and Color Schemes Database of Shaanxi Fengxiang Wood Engraving New Year Painting." In 2020 International Conference on Computer Vision, Image and Deep Learning (CVIDL). IEEE, 2020. http://dx.doi.org/10.1109/cvidl51233.2020.00-80.

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Wendland, Jozef, Paul M. Harrison, Matthew Henry, and Michael Brownell. "Deep engraving of metals for the automotive sector using high average power diode pumped solid state lasers." In ICALEO® 2005: 24th International Congress on Laser Materials Processing and Laser Microfabrication. Laser Institute of America, 2005. http://dx.doi.org/10.2351/1.5060456.

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