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813 Uppsatser om Diameter measurement - Sida 32 av 55
Framtagande av ny höjdmätningsmetod till försvarets antennhiss 861
This bachelor degree project was carried out at Saab AB Service and Repair, Arboga, Sweden. The objective was to design, construct and implement a new stable and reliable method of measuring the continuous vertical displacement (height) of the military search radar PS861 mounted on a hydraulic powered elevator. The end product needs to be durable enough to be fully operational in the harsh environment of an outdoor elevator shaft and yet as accurate and precise as possible since one of its purposes is to calibrate control equipment. Previously used technique has proven not to meet any of the above mentioned properties.A prototype using a high resolution quadrature output rotary encoder has been developed, allowing a completely digital interface. This new method has been evaluated in laboratory environment where tests have been conducted regarding both reliability and validity.
Att våga vara innovativ: En fallstudie om affärsutveckling av befintliga produkter i ett högteknologisk företag
High technology companies in Sweden spend a huge amount of money on research and product development in proportion to what they get back in earnings from their inventions. Product development has traditionally been regarded as much more important than business development. This thesis aims to point out the critical factors behind successful business development processes for high technology companies. We have chosen to make a case study of Hexagon, a highly successful and innovative company within the measurement technology business. Internal and external actors that are important for business development have been identified and interviewed in order to understand how ideas are developed and executed.
Förslag till nytt utförande av fasta ställbara fläkthjul
Examensarbetet går ut på att frambringa några principkonstruktioner till axialfläktar med fasta inställbara skovlar åtFläktWoods. Fläktarna det rör sig om är stora industrifläktar med en diameter mellan en och fem meter, som används för atttill exempel transportera ner luft i gruvor. Endast förslag till principkonstruktioner tas fram och ej en färdig produkt, syftetmed rapporten är i första hand att ge FläktWoods konstruktörer ett annat synsätt på problemet. Två olika delar av fläktenundersöks, dels fästet av skoveln på hjulet, dels själva hjulet i sig. Tillvägagångssättet är att från formulerat problem tasförst några förslag fram, de utvärderas sedan och de bästa går vidare till nästa steg.
Demonstratortest av gassensor baserad på tryckt organisk elektronik och jonledande papper
Researchers at Karlstad University have developed a method for making paper ion conducting. The reasearchers want to test this technique in various applications and produce products that make use of the ion-conducting paper. Hopefully this will drive the development forward and result in new applications for the ion-conducting paper.This study was to test the possibility of manufacturing a gas sensor of conducting paper along with electrodes of conductive polymers printed on the paper. By comparing the paper sensor with an electrochemical cell in which the electrodes of conductive polymer replaces electrodes of metal and ion-conductive paper replaces the liquid electrolyte in the electrochemical cell, it was hoped that it would be possible to measure the oxidation and reduction reactions that a gas could introduce at the electrodes.It was shown that it is possible to measure a potential difference in the range of 0.3 V to 0.5 V between the electrodes when exposing an electrode to 100% oxygen. The reaction that takes place is relatively slow and the reaction rate is partly due to the distance between the electrodes.Since the sensor can measure oxidation and reduction reactions it is possible that, in further development of a sensor, the sensor can be made ??into a versatile sensor with more applications than gas measurement as there are many more ways to oxidize or reduce the electrodes than by exposure to oxygen.During the study there have been discussions and meetings held with various companies in the sensor industry to be able to specify what the market demands of a sensor made ??of paper and the requirements that must be placed on the sensor for it to be interesting for the companies..
Att ragga på de svårflörtade: Om värdet av kampanjsajter för besökare och annonsörer
Campaign websites are a growing Internet based type of advertising, dependent upon the advertisement being actively pursued by consumers. The popularity of campaign websites stands in sharp contrast to the increasing advertising boredom among consumers often discussed in both public media and academic contexts. Despite the increasing importance of this kind of communication, little academic research has been conducted on the subject. The purpose of this thesis is to investigate the value of campaign websites for advertisers and consumers. Through a quantitative web based field study combined with an exhaustive qualitative study, we can draw conclusions concerning campaign websites and contribute with a theoretical framework for this type of advertising.
Hur viktig är statens styrka för ekonomiskt välstånd?- En studie av alla världens länder
What role does the state play in economic development? This thesis seeks to investigate the relationship between a strong state and economic development. To define the concept of a strong state I focus on the relationship between the scope of state functions and the efficiency of which these functions are implemented. The concept of a strong state is in this thesis defined as the efficiency of the state functions. By using a database constructed by three economists; David Kaufman, Aart Kraay and Massimo Mastruzzi as a measurement of a strong state I test the relationship with economic development empirically.
Observiaire och film som analysmetod för cykeltrafik : En fallstudie på Götgatan i Stockholm där omställningen till supercykelbana utreds
The goal of this thesis is to analyse whether the method ?Observiaire? is of any use for traffic analysis. The method consists of analysing film material, preferably before and after changes are made to an area, by answering a survey for the users that are observed within the population. The method also opens up for deeper qualitative analyses which are rooted in the quantitative data collected from the survey-study. In this study we analyse the method by applying it to the case study of the changes made at Götgatan in Stockholm, where a green wave was implemented and the bicycle road widened.
Hårdfräsning i verktygsstål : Förslitning av skäregg
This thesis work is made by Torbjörn Johansson on Karlstad University for Uddeholms AB. The assignment in this thesis work was to investigate tough cutting in three different tool steels: Vanadis 4 Extra, Vancron 40 and Sverker 21. The research was to compare the wear of the tool after cutting in each one of the tool steel alloys. The research was also made to see if the tool cutting in Vancron 40 has a better wear than the tool cutting in Vanadis 4 Extra and also compare the results with Sverker 21. All three of these alloys are a part of Uddeholms AB:s range of products, and is used in applications like forming tools and knife tools. Vancron 40 is a powder steel with a very good combination of mechanical properties like ductility, adhesive strength and hardness.
Modellering och simulering av det evaporativa bränslesystemet i en personbil
This thesis work has been performed at the department of diagnosis and dependability at Volvo Car Company, Torslanda. The background of this project is based on interest in ascertaining how different factors possibly can affect a diagnosis method, which has been developed to find leaks in the fuel tank and evaporation system. According to the OBD II requirements leaks with an orifice diameter larger or equal to 0,5 mm, must be detected. The idea of the diagnosis method is to create an over pressure in the system with an air-pump. The current through the pump is measured and correlates to the power consumed by the pump.
Långtidsfrisk eller arbetsglädje - vad speglar arbetsrelaterad hälsa?
The work related illness has increased and instead of focusing on what?s causing it more and more efforts are put on trying to find the health factors within and outside the work environment. During the past years the term ?long-term health? has arisen; instead of focusing on the number of employees on the sick-list, the focus should be put on the number of employees that has a record of long-term health within an organization, i.e. health-presence.
Framtagning av OptimalInfästningsmetod av OGV mot Stag för Engine Product Systems Sweden : Development of optimum method of attachment of OGV to brace for Engine Product Systems Sweden
GKN Aerospace Sweden (GAS) utvecklar och tillverkar motorkomponenter för både den civila och militära flyg-och rymdindustrin. En av produkterna som GKN tillverkar är en outlet guide vane(OGV), vars funktion är att omdirigera det axiella luftflödet från fläkten. OGVn är den mekaniska länken mellan kärnstrukturen och fläkthuset. Ett viktigt mål är att minska vikten på motorn samtidigt som dess diameter ökar när motorerna blivit allt större.For att lösa detta krävs ett material med hög hållfasthet i förhallande till vikten. Ett examensarbete som föregår detta har utvecklat ett koncept som innefattar en OGV i en viss GKN-utvecklad tekonologi.
Koncept - detalj - byggnad
Concept - detail - buildingStockholm International Fairs, new main entrance I studied at the KTH School of Architecture from 1995 to 2000. After completing my studies I wanted to work in an office that had a structural way of thinking and that knew the building process; I therefore chose to work for Rosenberg Architects. I have worked on a number of projects, among them several for the Stockholm International Fairs, from the Rica Talk Hotel and Hall AE, to the new main entrance.In the projects we undertook at the School of Architecture we had to identify and draw details that were central to our concepts. I have here identified some key details that we considered to be essential for the concept in a built project; the new main entrance of the Stockholm International Fairs completed in 2013. The entrance has complex logistics with multiple intersecting flows: exhibitors, employees, journalists, VIPs and others.
The new accounting of intangible assets: Effects of IFRS 3 on the accounting of intangible assets in acquisition-intense companies on the Stockholm Stock Exchange
Intangible assets are often a significant part of Swedish companies? assets. Most of these are accounted for as goodwill, arising from acquisitions. After EU:s decision to adopt IFRS as the new accounting standard, intangible assets will to a larger extent be recognized separated from goodwill. This thesis aims to quantify this change and to analyze what specific intangibles are affected most by the transition to IFRS.
Vad är ?rätt? gjutkvalitet? Hur uppnås det?
Ever since ABB has begun diecasting their rotors instead of permanent mold casting it,variation in the quality of the cast has arisen. Diecasting is performed in three differentmachines, M1, M2, M3 with 400, 660 respectively 800 tons of die locking pressures.The aim of this thesis is to answer the following questions:What is the ?right? cast quality? How is the right quality achieved?For sizes 160-180 solutions will be proposed that consider eccentricity between thelaminate and the short circuit ring as well as elimination of the thin Al film that appearson the outer periphery of the rotors.Through considering the statistic material the most often diverging rotor type has beenidentified and one of the actual rotors has been sent to a laboratory to be analyzed inorder to establish the current defects. The result of the analysis shows that there areplenty of gas- and oxide-porosity.It has been proved that every time the dies temperature decreased below 120°C thecontent of gas porosity increased. It is due to rapid solidification of metal that flowsthrough the ?cold? laminate.It has confirmed that enhanced porosity in squirrel cage causes high impedance in therotors.
Analys av mätdata från nätstationer
Fortum has in a pilot project installed metering equipment with wireless communication in secondary substations in Stockholm. So far, the collected data are used only in specific projects.This master thesis was carried out at Fortum Distribution AB in Stockholm during 2013. The purpose of this study is to simplify and enhance the use of data in for example network planning process, by giving suggestions on how data can be managed and giving examples of analyzes that collected data can be used for.The electricity meter which Fortum has installed is a EDMI-Mk10A which is set to measure max/average/min values with a one hour time resolution of the following parameters: voltage (per phase), current (per phase) andactive power and active and reactive energy.In order to analyze the collected data an analysis tool is required. During this thesis two customized tools in Microsoft Excel have been developed, one for sorting data and one for analyzing.One aim of the thesis is to show examples of what collected measurement data can be used for. This work shows an example of analysis of active power, power factor, voltage, occurrence of interrupts and the relationship between outdoor temperature and power.This master thesis has among others resulted in the following advice: Expand the number of secondary substations with measuring equipment.