This report describes the design and implementation of a multi-master, packet based protocol for small and tiny microcontrollers where resources are limited. The protocol was named "Tiny Controller Network" or TCN for short. The protocol is meant mainly as a control bus for automation and sensor acquisition applications but due to its flexibility can also be used for other purposes as well. It borrows some of its functionality and design ideas from the well known CAN bus and Modbus but also has a number of major differences like the use of standard hardware and time synchronisation. One of the key aspects during the design was the use of very little system resources and common on-chip hardware peripherals like a UART.

In the pulp industry, digesters are used to disolve lignin in wood chips. The concentration of lignin is measured and is called the Kappa number. In this thesis, the question of whether an online Kappa sensor, taking samples from the mid-phase of the digester, is useful or not is analyzed. For the samples to be useful, there has to be a relationship between the measured Kappa at the mid- phase and the measured Kappa in the blowpipe at the bottom of the digester. An ARX model of the lower part of the digester has been estimated.

AASS (Applied Autonomous Sensor Systems, Centrum för Tillämpade Autonoma Sensorsystem) arbetar med forskning inom autonoma system. Deras stora användningsområden är utveckling av automatiska system till fordonsindustrin samt system till äldrevården.AASS, har ett önskemål om en enklare modell av en CNC fräs för enklare fräsning till bland annat prototyptillverkning. Fokus ska ligga på kostnaden då precisionen inte är av största intresse.Uppdraget innebär att ta fram en konstruktion av en cnc- router med tre axlar med ett arbetsrum på 600x450x150mm. Maskinen ska kunna skära i mjuka material som trä, plaster men även mjukare aluminium.Resultatet är en tre axlig cnc- router som drivs av tre stycken stepmotorer som är kopplade till respektive kulskruv. Cnc routern har ett arbetsrum på cirka 600x450x150mm.

An often encountered problem when implementing a mass flow regulator in a rolling mill is the one with measurement of speed. The most widely used solution is to fit a pulse counter to a wheel that is in contact with the strip. Common problems with this design are for instance scratch marks on the strip and problems with the flatness measuring system.  One way of circumventing the aforementioned problems would be a non-contact measuring system. The market of today only offers systems based on the Doppler principle.This report evaluates three different systems for non-contact speed measurement. Important areas in the evaluation have been the ability to operate under normal rolling conditions, integration in existing control system and how well the sensor can be fitted to the rolling mill.

An often encountered problem when implementing a mass flow regulator in a rolling mill is the one with measurement of speed. The most widely used solution is to fit a pulse counter to a wheel that is in contact with the strip. Common problems with this design are for instance scratch marks on the strip and problems with the flatness measuring system.  One way of circumventing the aforementioned problems would be a non-contact measuring system. The market of today only offers systems based on the Doppler principle.This report evaluates three different systems for non-contact speed measurement. Important areas in the evaluation have been the ability to operate under normal rolling conditions, integration in existing control system and how well the sensor can be fitted to the rolling mill.

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.

Detta projekt har syftat till att inleda arbetet med att utveckla ett system för snabb och dynamisk reglering av pelletsbrännare. Projektet har haft tre målsättningar: ? Undersöka potentialen att minska utsläpp från en kommersiell pelletsbrännare för villabruk. ? Kartlägga vilka sensorer som lämpligen kan användas i en sådan reglering med hänsyn till funktionalitet och pris.

Renal dysplasia is a developmental anomaly of the kidneys which is considered to be the primary lesion in juvenile progressive nephropathy, a condition leading to chronic renal failure in young dogs. It is defined as disorganised development of the renal parenchyma due to abnormal differentiation, and pathological lesions include persistent foetal structures, dysplastic tubules and cartilaginous and osseus metaplasia. The aetiology of renal dysplasia in dogs is still unknown, but possible causes are infection with canine herpesvirus, teratogenic substances or intrauterine ureteral obstruction. In some breeds renal dysplasia is a familial or inherited disease. Clinical signs of chronic renal failure, such as polyuria, polydipsia, vomiting, weight loss, anorexia, lethargy and anemia, usually appear before the age of 2 years.

The last ten years two major movies about journalists have been made in Sweden; Sprängaren and Män som hatar kvinnor. This study has looked closer at the heroine Annika Bengtsson and the hero Mikael Blomkvist from these two movies. Since movies do have great influence on how we see the world it is important to find out how these characters are being portrayed. Also, in a time when journalism is about to become a female dominant occupation it is relevant to see how the female journalist compares to the male. It is important to ensure that the films do not give a wrongful picture of male and female journalists.

I detta examensarbete undersöks möjligheten att automatisera underhåll med ett trådlöst inbyggt sensorsystem i en fallstudie om tvättmaskiner. Idén är att produkten ständigt kontrolleras via ett trådlös inbyggd sensor-system, där den kopplas upp och övervakas via ett moln. Det presenteras två molntjänster varav ett av dem används. En trådlös sensordesign an-vänds för att visa hur arbetet läggs upp, följt av hierarkiska modeller som beskriver designen i hårdvaru-och mjukvarunivå. Fem olika input-/outpu-tanalyser presenteras, där viktiga parametrar undersöks utifrån flera olika perspektiv och sensorer som kan mäta dessa parametrar.Som det framgår i resultatet, används den mest effektiva input-/outpu-tanalysen praktiskt på tvättmaskinen samt att prototypen anpassas efter den valda input-/outputanalysen.

There is always a need for more effective ways to store energy in order to reduce the human impact on the environment. One step on the way can be the use of flywheels as kinetic energy storage devices. Low frictional losses are essential for a flywheel to be effective. To minimize these losses active magnetic bearings (AMB) can be used to keep the shaft centered instead of the more conventional ball-bearings. AMBs use actuators and a fast control system that needs correct and noise-free measurement data of the shaft position and the current in the actuators to work properly.This thesis explains the process of constructing power electronics and a current measurement system for active magnetic bearings (AMB).

This study presents results for observing forest changes in Sweden using multi-temporal L-band satellite data and is a part of the JAXA?s ALOS Kyoto and Carbon Initiative. An extensive dataset of images acquired by the Advanced Land Observing Satellite Phased Array type L-band Synthetic Aperture Radar (ALOS PALSAR) is investigated for clear-cut detection in boreal forests in northern Sweden (Lat. 64°14? N, Long.

Målet med detta examensarbete är att ersätta den tidigare lösningen av sensorfingret med andra komponenter, eller hitta en annan sensor med motsvarande funktion.Arbetet har begränsats av att ESAB vill ha ett mekaniskt finger för användarvänlighetens skull. Efter en förundersökning av olika typer av sensorer har vi valt att använda oss av trådtöjningsgivare som sensorer till det mekaniska sensorfingret. I och med detta val behövde vi även komma med ett teoretiskt förslag på en mekanisk upphängning av sensorfingret.Vi har byggt upp två separata Wheatstonebryggor med varsin instrumentförstärkare (INA125). Utsignalen från bryggorna är relativt liten och behövde förstärkas cirka 2000 gånger.Nollbalansering av bryggorna har skett manuellt med potentiometrar men vi har även gett ett förslag på en lösning där nollbalansering kan ske med ett enkelt knapptryck. Knappen är placerad på upphängningen på ett sådant sätt att man inte kan trycka oavsiktligt på knappen.Resultatet av arbetet är en uppkoppling på en experimentplatta samt förslag på hur upphängningen och sensorfingret designmässigt kan se ut.För vidare arbetsgång behövs en prototyp för att testa livslängden och ta reda på vilken känslighet som är mest optimal..

This report is written in cooperation with Eskilstuna municipality public administration for urban planning. The reports purpose is to look into how other public authorities carry out public purchase of consultants and entrepreneurs in the urban planning area. The goal is to come up with suggestions of how Eskilstuna municipality public administration for urban planning can improve its purchasing process in this field in order to minimize the risk where a consultant or entrepreneur files an appeal against the decision of awarding a contract to another rival. The appeal can be filed to the county administrative court.The public administration for urban planning can do its purchases through the model of "lowest price" or "economically most favorable" for them. When using "economically most favorable", the department can value a number of soft parameters by giving them points and the offer which gets most points can be rewarded the right to sign a contract.

For several years Uppsala University together with several companies has been involved in a WISENET project aimed at improving railway transport security. By placing a sensor system near the wheels of each wagon, the temperature of the bearings can be measured and transmitted to a collector placed centrally on the wagon. This in turn transmits the collected data to RFID receivers placed intermittently along the railway.As the signals are transmitted wirelessly, problems may occur as the antennas get dirty or coated with ice and snow. To determine the effects of these coatings, several tests were performed examining the reflection coefficient S11, the impedance Z11 and the efficiency eta of an antenna, and how they varied when various coatings were placed over the antenna. Examined coatings were ice, snow and water to determine the effects of weather, and various metal-based coatings: powdered iron both pure and partially oxidized, and iron ore granules.