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image-Based Analysis of Plate Separation and Clearance Distribution in Wet Clutches

applied SCIENCES-BASEL 2024年第20期14卷 9270页

作者： Pointner-Gabriel, Lukas Flamm, Simon Voelkel, Katharina Stahl, Karsten Tech Univ Munich Gear Res Ctr FZG TUM Sch Engn & Design Dept Mech Engn D-85748 Garching Germany

A fundamental understanding of wet clutches' drag loss behavior is essential for designing efficient clutch systems. It has been widely recognized that the separation behavior immediately after disengaging the clutch and the resulting clearance distribution influence the drag loss behavior. However, these influencing factors have yet to be systematically investigated. Therefore, this study aimed to experimentally investigate the effects of plate separation and clearance distribution on drag loss behavior under different operating conditions and modes. For this purpose, image series of an operating clutch system were recorded and subsequently analyzed using image processing algorithms to evaluate the movements of the plates. Based on this, the effects on drag loss behavior were analyzed. The investigations were carried out on a clutch system used in an industrial application. The measurements show that the axial movements of the plates comprise main and superimposed non-periodic movements of much a smaller amplitude. The separation of the plates is primarily driven by the applied differential speed so that the set total clearance is only utilized mainly in the higher differential speed range. The separation behavior, therefore, decisively influences the drag loss behavior. The plates can even remain in contact in the low differential speed range. The investigations also showed that the separation behavior and, thus, the drag loss behavior can be improved by using waved plates, especially in the low differential speed range. It was also found that a high plate number and a large set total clearance support a non-uniform clearance distribution. Based on the investigations conducted, it is possible to expand our fundamental knowledge of separation behavior and clearance distribution, allowing for a reduction in the drag losses of wet clutches. The findings can thus contribute to the development of low-loss and compact clutch systems.

关键词： applied image processing wet clutches drag losses plate separation

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Multi-channel supported surveying of industrial floor tiles

Multi-channel supported surveying of industrial floor tiles

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2020 International Instrumentation and Measurement Technology Conference

作者： Illmann, Raik Rosenberger, Maik Notni, Gunther Tech Univ Ilmenau Dept Mech Engn Grp Qual Assurance & Ind Image Proc Ilmenau Germany

ISBN: (纸本)9781728144610;9781728144603

Within the building industry, there is an increasing trend towards automation for various reasons. The modelling of human intuitive abilities and the handling of building materials with increasing dimensions leads to some problems in the necessary sensor technology. This paper deals with a technical treatment of the multi-channel acquisition of floor tiles within a system for large-area automated tile laying. Concrete detecting problems of large-format building materials are dealt with and a possibility is presented to determine necessary parameters for a pick and place system. There is a whole systematic description of the measurement system design, including preinvestigation and spectral aspects. Special attention is given to the optimization of the image-based recognition system, edge detection and the elimination of environmental influences. In the last part, the necessity for a multichannel system is presented and its implementation is explained.

关键词： Automation industrial measurement applied image processing segmentation applied multichannel imaging

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Analysis of Soot Propensity in Combustion Processes Using Optical Sensors and Video Magnification

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SENSORS 2018年第5期18卷 1514-1514页

作者： Garces, Hugo O. Fuentes, Andres Reszka, Pedro Carvajal, Gonzalo Univ Catolica Santisima Concepcion Dept Comp Sci Concepcion 4090541 Chile Univ Tecn Federico Santa Maria Dept Ind Valparaiso 2390123 Chile Univ Adolfo Ibanez Fac Sci & Engn Santiago 7941169 Chile Univ Tecn Federico Santa Maria Dept Elect Valparaiso 2390123 Chile

Industrial combustion processes are an important source of particulate matter, causing significant pollution problems that affect human health, and are a major contributor to global warming. The most common method for analyzing the soot emission propensity in flames is the Smoke Point Height (SPH) analysis, which relates the fuel flow rate to a critical flame height at which soot particles begin to leave the reactive zone through the tip of the flame. The SPH and is marked by morphological changes on the flame tip. SPH analysis is normally done through flame observations with the naked eye, leading to high bias. Other techniques are more accurate, but are not practical to implement in industrial settings, such as the Line Of Sight Attenuation (LOSA), which obtains soot volume fractions within the flame from the attenuation of a laser beam. We propose the use of Video Magnification techniques to detect the flame morphological changes and thus determine the SPH minimizing observation bias. We have applied for the first time Eulerian Video Magnification (EVM) and Phase-based Video Magnification (PVM) on an ethylene laminar diffusion flame. The results were compared with LOSA measurements, and indicate that EVM is the most accurate method for SPH determination.

关键词： smoke point diffusion flame applied image processing Eulerian Video Magnification Phase-based Video Magnification

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User-oriented approach to developing modular video analysis systems for engineering research applications

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The Journal of Photographic Science 2007年第4期55卷 206-214页

This paper introduces an enhanced method for developing video analysis tools, in the context of engineering research applications. It aims to expand the usual boundaries for design of image analysis systems to include explicitly ease of use, maintenance and upgradeability by researchers who have little or no background in image analysis. This challenge moves the emphasis away from the design of optimally efficient (but esoteric) tools for the processing of video- and image-based data, and shifts it towards the development of tools that perform satisfactorily, while being easy to understand, maintain and develop. In the proposed design methodology, this balance is struck using popular commercial software that has a thoroughly tried and tested user interface and yet supports modular expansion through the use of 'plug-ins'. This approach eliminates the need to deal with the vast majority of image analysis infrastructure, while focusing attention on the development of the code at the core of the required image analysis functionality. The development of this core code is then simplified through the selection of a plug-in creator tool that opts for visual programming 'in lieu' of procedural programming as far as possible. In order to evaluate the effectiveness of this proposed new system design approach, a case study is investigated that involves developing a solution to a real image analysis problem faced by research colleagues at the University of Brighton. This concerns a study of the air-side fouling phenomenon of compact heat exchangers by large particles. The implemented system delivers close monitoring of a radiator's surface so as to track the clogging mechanism during the execution of a series of wind-tunnel experiments, which attempt to replicate the fouling phenomenon realistically. The data extracted are presented in the form of several graphs, which describe the progress of these experiments, and have made a definite contribution to the work of the primary re

关键词： VIDEO ANALYSIS applied image processing FOULING OF HEAT EXCHANGERS MODULAR image processing END-USER TAILORING

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