No description available.

No description available.

Följande examensarbetes rapport handlar om utveckla konstruktion, modellering samt ner skalning av ett projekt, glasögon upphittaren. Arbetet som rapporten bygger på är utfört i samarbete med uppdragsgivaren Birger Klasson. Projektet innefattar utvecklingen av ett gammalt projekt som gjorts på högskolan innan som handlar om glasögon upphittare, deras grupp fokuserade på teknologin som användes för att mota signaler. Skälet bakom utvecklingen är att skala ner den gamla prototypen men även modellera en smidigare design för skalet. Genom några möten mellan uppdragsgivaren och författarna har idén kommit fram om att uppdatera chipet med GPS sändare inbyggt med ljud-enheten. De ska kopplas ihop med en mobil enhet genom Bluetooth-signaler. Flera olika lösningsförslag har utarbetats där det till slut uppenbarats två olika koncept på lösningar. De två lösningarna har vägts upp mot varandra utifrån metoden från principkonstruktionen. Resultatet av dessa bedömningar blev ett förslag där skalet komprimeras till chipets storlek för smidigare grepp runt bågarna, samt att den inte tar lika mycket utrymme. Prototypen visade sig vara lyckad,  onstruktionens dimension är hälften jämfört med den ursprungliga prototypen. Produkten har en ny smalare design, fäster sig lättare på glasögon samt uppdaterad teknologi i chip och mottagare.  De olika metoderna som följdes under arbetets gång kom från tillverknings-, primär-, och principkonstruktions kurserna.

The purpose of the work described in this thesis was to develop techniques based on non-invasive measurements of logs and sawn timber that would increase the profitability of the wood industry in general and sawmills in particular. The work has two main focus areas: computed tomography (CT) scanning of logs and traceability of wood products.The first focus was on detecting knots in CT images of logs and to find ways to use the knot information efficiently. The result is an automated algorithm that can successfully detect knots in CT images of Scots pine (Pinus sylvestris L.) and Norway spruce (Picea abies (L.) Karst.). Knots have a negative impact on the bending strength of sawn timber and, since knots can be detected in CT images of logs, it is possible to adapt the sawing process to take into consideration where the knots are located. This thesis includes an investigation of the profitability gain for a sawmill producing strength-graded sawn timber of Norway spruce when detailed knot information from a CT scanner is used. The strategy was to optimize the log breakdown by rotating logs to an optimum position with respect to the sales value of the sawn timber. The investigation was carried out using computer simulations. The work also includes an investigation into how accurately the bending strength of sawn timber can be predicted from information in CT images of the logs. Features and defects in the CT images were measured and key parameters were inserted into multivariate PLS regression models. The models were calibrated with data from destructive bending tests and, although the results were unclear, there were indications that the bending strength could be predicted with a higher accuracy using CT scanning than by using log scanning techniques that are currently common in the industry. The second focus area was fingerprint traceability of individual wood products, which is valuable for sawmills since it enables detailed process control. Diagnostics and process surveillance could be based on statistics for each individual piece of sawn timber instead of on statistics at a batch level. Without an automatic recognition system for sawn timber, such studies would involve labor-intensive and possibly process-disruptive manual tests. The work includes the development of two wood surface recognition systems based on different techniques. One of them uses information about how knots are positioned in relation to each other to construct scale- and rotationally-invariant descriptors. The performance and robustness of this recognition system were tested on 212 edge-glued panel images of Scots pine with different noise levels. The other recognition system was specialized on sawn timber. This particular method considerably reduces the resolution of the board images and matches them using template matching. Tests were performed by matching three sets of 88 board images to a database of 886 Scots pine boards. The recognition systems have different strengths and weaknesses due to their design, but both of them were fast and had high recognition rates in the tests carried out. Overall, the work led to several computerized methods that enable increases in profitability of sawmills. The proposed knot detection in CT images of logs enables detailed control of the log breakdown process, and the proposed fingerprint traceability methods permit process control based on individual pieces of sawn timber. Results from this thesis also give sawmill managers valuable information on how an industrial CT scanner would affect the profitability of their sawmills. / Godkänd; 2015; 20150418 (erikjo)

Keen competition in modern industry motivates companies to produce better products in shorter lead-time. In addition low cost is another key factor that leads commercial success of a product. In the last decade, rapid development and implementation of computer technologies have had great impact on the product development process. In the engineering area, the widely-used advanced computer-based tools enable engineers to design, analyze, simulate and test products by means of digital prototyping in the early phase of the product development process, and therefore dramatically help companies to produce better products with lower cost in shorter time. In practice, design of a complicate product is a complex work where several computer programs from different domains need to be involved. These programs normally need to combine, exchange, and share relevant product data to each other. For instance, Finite Element Analysis and Computational Fluid Dynamics may use geometrical data from a solid model and loads from a Multibody System to perform structural analysis and fluid analysis. The integration of engineering information becomes a more and more important issue in the product development process. However it is difficult to perfectly realize it due to some of the characteristics of engineering information: Heterogeneity. Programs use their own formats (domain specific or application specific) to store information and run on different operating systems and hardware. Distribution. With the development of computer network technology, a trend of engineering information systems has evolved from central systems towards distributed systems. Both data and computer programs are distributed and dynamic. This thesis deals with integration of engineering analysis information in the product development process. The research question is formulated as: How to integrate, share and exchange engineering analysis information in the product development process? The aim is to improve the ability and efficiency of integrating engineering analysis information by using modern database technology as well as other relevant technologies. A prototyping system consisting of a Mechanical Computer Aided Engineering (MCAE) system and an active mediating Database Management System (DBMS) is built. In this system the DBMS is embedded within the MCAE system, meaning that engineering applications not only gain general database capabilities such as storage management, uniform data model, query language and query processing, but also the possibility of combining data from different representations and data sources. In addition, this work presents an active database approach to enable exchange of engineering information among distributed team members in a timely manner. The distributed information is automatically synchronized between different places using database ECA rule and mediation. Only the changes are distributed to other places, which minimise the information transfer and enhance the performance. Members working at different locations can therefore interactively manipulate the same set of information at the same time. / Godkänd; 2002; 20070224 (ysko)

It is important to control critical dimensions of aero engine components during the manufacturing process in order to maintain the quality. However, there is also a need for reduced lead-time and cost. Simulation can be a tool to achieve this. It can give information about dimension, shape, and residual stresses after each manufacturing process. The objective of the work presented in this thesis is to develop an efficient and reliable method for simulation of welding and heat treatment by using finite element analysis. The simulations will be used for designing and planning the manufacturing processes in order to obtain an acceptable final shape of the component and a robust manufacturing process. An experimental set-up has been developed to evaluate the accuracy of simulations models used in welding analysis. Experiments show that the models can be used in the preliminary manufacturing preparations, in order to evaluate fixture set-ups and process parameters for welding qualitatively. A reliable simulation method can not be achieved if not the process parameters are closely coupled to the simulation model. The stress relief heat treating process in a gas cooled vacuum furnace can be simulated by using radiation boundary conditions for the heating sequence. By using computational fluid dynamics is the estimation of the heat transfer during the cooling stage of the heat treatment process improved. These conditions are strongly dependent on the position of the component in the furnace. There are also large differences in heat transfer coefficient on the individual surfaces on the component. / Godkänd; 2001; 20070313 (ysko)

Hydroelectric power generation supplies about 20 percent of the world's electricity and is the most important renewable energy converting industry. The installed capacity of Hydro-electrical power generation is approximately 700GW with a production of 2600TWh/year. The technically feasible potential of hydro power is 14000TWh/year. In many countries, the hydroelectric generation where build in the 20th century on a regulated energy market, where the units served base load. Nowadays hydroelectric generation are more and more used to serve intermittent load on a deregulated market. This has lead to a new way to use old constructions, and it becomes interesting to study the characteristics of these machines, used for the demands of the 21th century. The aim of the research project of this thesis is to characterise, model and simulate old in service hydro electrical power generating units, to improve the design to the demands of today. This thesis presents three different models for hydro power rotor systems. The first model is developed to study the fundamental dynamics of the whole rotor system and includes simplified models for the unsymmetrical electro- magnetic field and the fluid interaction in the turbine. The model has been evaluated with on-site measurements. From the first model it has been shown that the fundamental excitation frequencies due to the electro-magnetic field can be described on a simple form. The results from this model also indicate that the fluid dynamical interaction in the turbine has to be model more in detail to determine both amplitudes and frequencies of excitations. The second model is concerning the generator of the rotor system. The model is divided into one electro-magnetic finite element model and one simplified mechanical model. Simulation and analysis are carried out due to the reactive power produced by the generator. It has been shown that the reactive power influence the natural frequencies, steady state response and stability of the rotor system. The third model presented in the thesis is developed for characterisation of hydro power rotor systems by use of the electro-mechanical interaction in the generator. The model consists of a finite element model with rotor dynamical applications. Simulations are carried out for one commercial hydro power unit and the results are compared with measurements. The results indicates that the suggested method excite a few eigenfrequencies. It is concluded that the method needs to be improved in order to separate response due to electro-mechanical and fluid dynamical excitations. / <p>Godkänd; 2006; 20060925 (cira)</p>

IoT- technology, Internet of Things, is a fast-growing business, it means that more and more products, clothes, even people are provided with sensors that can communicate and perceive the surroundings to create a smarter community. For companies to keep up to date, it is essential to continuously provide products with better components and reduced size. To stand out further, companies should provide revolutionary products, with totally new feature. One of these ideas, of a new kind of product with special features, have been investigated and developed in this thesis. The thesis has been conducted with the company CombiQ, located in Jönköping, Sweden. The product that was going to be developed was an industrial sensor, that uses the technology of IIoT, Industrial Internet of Things, that the company develops. At the time when this project took place, CombiQ did not sell any own product, only the technology that was placed inside the products. To develop the industrial sensor for CombiQ, not only the functions of the product had to be investigated, further the brand had to be analyzed to create a design expression reflecting the company. Through implement several tools and methods, from among other things the product development process and design thinking, a concept of an industrial sensor is presented that fulfill the specific requirements and functions. Where the main-feature is that the sensor should be a modular solution to be adjusted for the specific need of the clients. Furthermore, during the project a visual brand language with design guidelines have been developed to reflect the design aspects of the company CombiQ. Design guidelines can be used for further product for the company in the same manners, which also has been displayed by developing design concept of the rest of the industrial sensor that counts to the same product family as the modular sensor. / IoT-teknologi, Internet of Things, är en snabbt växande marknad, det innebär att mer och mer produkter, kläder, även människor förses med sensorer som i sin tur kan förstå omgivningen och kommunicera, detta för att skapa ett smartare samhälle. För att företag ska kunna vidhålla positionen på marknaden är det viktigt att hela tiden erbjuda produkter med bättre komponenter och mindre till storleken. För skapa en starkare position, företaget borde erbjuda revolutionerande produkter med unika egenskaper. Det är en av de här idéerna som har undersökts i det här examensarbetet. Arbetet har skett under ett samarbete med företaget CombiQ, belägen i Jönköping. Produkten som skulle tas fram var en industriell sensor, som skulle använda sig av IIoT-teknologin, Industrial Internet of Things, som företaget utvecklar. Tidpunkten när det här arbete utfördes, CombiQ hade inga egna produkter men all teknologi som sitter i sensorerna. För att ta fram en industriell sensor för CombiQ behövde inte bara möjligheterna att tillverka en produkt utefter funktionerna undersökas. Varumärket behövde även analyseras för att utveckla en produkt som uttrycker företaget och dess varumärke på rätt sätt. Genom att tillämpa metoder och verktyg från både produktutvecklingsprocesser och designprocesser, kunde ett koncept tas fram som uppfyllde de uppställda kraven och funktionerna. Den huvudsakliga funktionen i sensorn var att produkten skulle bestå av moduler och på det viset kunna justeras utefter vad kunden behöver. Vidare, under projektet har även CombiQ som varumärke undersökts och riktlinjer för designen har tagits fram som reflekterar företaget och dess varumärke. Design riktlinjerna kan användas för att ta fram ytterligare produkter med samma maner, vilket har visats i detta arbete genom att ta fram designkoncept på ytterligare produkter som räknas till samma produktfamilj som sensorn med moduler.

Denna rapport kommer att avhandla det examensarbete som genomförts inom CAD-Teknikerprogrammet på Högskolan i Halmstad. Arbetet har genomförts på Maltes Fuel &amp; Wash AB och startade 24:e mars 2017 med slutpresentation den 23:e maj 2017. Malte Fuel &amp; Wash AB är ett företag baserat i Halmstad och tillverkar bland annat portabla bränslestationer till oljeindustrin samt bilindustrin. Den produkt som detta projekt kretsas runt är deras nyaste version av en minitank som rymmer ca 57m^3 bränsle som är en lite större variant av deras nuvarande portabla bränslestationer. Uppdraget från Maltes Fuel &amp; Wash Ab var att optimera stålchassit så de väger så lite som möjligt men ska klara transporten utan några skador samt deformationer i materialet. Då det är en portabel konstruktion så måste man räkna med att den ska kunna lyftas med kran och transporteras på lastbilar då ett problem som kan uppstå är böjningar i balkarna då de är 12m långa och blir belastade ca 18 ton av resten av konstruktionen. För att lösa dessa problem så har uppdraget uppdelats i olika delmoment som ska lösas på olika sätt. Det har tagits fram olika 3D koncept och optimeringsberäkningar samt FEM analyser med hjälp av Catia v5. Dessa koncept har utvärderats så att de uppfyller Maltes Fuel &amp; Wash AB’s krav och önskemål.

The supplying of engineer-to-order joinery products to the construction industry is a novel research area in both the wood-related and the construction-related fields. The process of supplying the construction industry with highly refined one-of-a-kind wood products is here examined in order to explore possible process innovations to identify factors contributing to inefficiency, to define areas for innovation to improve industry performance, and to evaluate 3-D sensing technologies as a way of achieving a model-based joinery production. The organizations studied use a mixture of concept-to-order and design-to-order production strategies to produce what in this thesis are called engineer-to-order joinery products.The main consumer of the engineer-to-order joinery products are theconstruction industry, an industry that has been criticized for not keeping upwith other production industries in terms of quality, cost efficiency, innovation,and production methods. The development of Lean production principles andsupply chain management are innovations commonly suggested to increase the degree of industrialization in the construction industry, and this is reflected in the research approach adopted for the work described in this thesis. The conditions for supplying engineer-to-order joinery products to theconstruction industry have been studied and areas for innovation efforts aresuggested. The primary research question has been: Can new technology and new management methods be applied to improve process efficiency and efficacy in the supplying of engineer-to-order joinery products? Lean principles and 3-D sensing are two perspectives chosen to investigate this supply process. The study has used both qualitative and quantitative research methods, with a slight overweight towards the qualitative methods, as the context for the quantitative research has always been in focus. Real-world case studies have been used for the empirical data collection.The results suggest that there is a significant potential for increasing efficiency and efficacy through: greater focus on cross-organisational innovation focusing on higher levels of industrialisation, new forms of contractual relations, supply chain cooperation, improved knowledge-transfer and information management, developing competence on 3-D sensing and “BIM”-modelling, and through organisational consolidation. / Godkänd; 2016; 20160413 (samuelfo); Nedanstående person kommer att disputera för avläggande av teknologie doktorsexamen. Namn: Samuel Forsman Ämne: Träteknik/Wood Science and Engineering Avhandling: Suggestions for Innovation in the Supplying of Joinery Products Through the Application of Lean-Thinking and 3-D Sensing Opponent: Biträdande professor Jakob Rehme, Institutionen för eknomisk och indstriell utveckling, Linköpings universitet. Ordförande: Professor Dick Sandberg, Avdelningen för träteknologi, Institutionen för teknikvetenskap och matematik, Luleå tekniska universitet, Skellefteå. Tid: Torsdag 2 juni, 2016 kl 10.00 Plats: Hörsal A, Luleå tekniska universitet, Skellefteå