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Hantering och presentation av mätdata i en webbapplikation
2012 (Swedish)Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesisAlternative title
Handling and presentation of measurement data  in a web application (English)
Abstract [sv]

Mätning av exempelvis energiförbrukning och temperatur förekommer i vissa industriellasystem. Mätning sker med hjälp av en eller flera sensorer. Data samlas in, bearbetas, lagrasför att slutligen presenteras. Teknik och konsultföretaget Altran i Karlstad har utvecklatett sådant system. Mätdata presenteras i en Android-app.Denna uppsats beskriver ett projekt med syftet att utveckla en plattformsoberoendewebbapplikation för presentation av mätdata. Webbapplikationer är inte bundna till ettspecifikt operativsystem, utan visas i en webbläsare. En annan viktig del av projektet vardessutom att utveckla ett system som på ett generellt sätt hanterar insamlad mätdata.Två metoder för generering av grafer har jämförts i ett flertal prestandatester. En metodär generering av grafer på servern, som skickas som bild till klienten. Den andra metodenär att skicka mätdata till klienten och där generera grafen.Projektet har resulterat i en webbapplikation med funktionalitet mycket lik den Android-app som tidigare utvecklats av Altran. Ett komplett system för insamling, hantering ochlagring av mätdata har också utvecklats.Resultaten från prestandatesterna visar att ingen av metoderna är överlägsen i allasituationer. Vilken metod som är optimal beror mycket på prestanda hos klient och server,samt bandbredd.

Abstract [en]

Measuring of energy consumption and temperature occurs in certain industrial systems.The measuring is performed with one or several sensors. Data is collected, processed andstored and later presented. A technical consulting company, Altran, in Karlstad, havedeveloped such a system. The measurement data is presented in an Android app.This dissertation describes a project with the purpose of developing a plattform inde-pendent web application for presenting measurement data. Web applications are not boundto a specific operating system but are instead shown in a web browser. Another impor-tant aspect of the project was to develop a system that in a general way handles collectedmeasurement data. Two methods for graph generation have been compared in a number ofperformance tests. One method is by generating the graph as an image on the server andthen sending the image to the browser. The other way is to send the measurment data tothe client and then to generate the graph in the browser.The project has resulted in a web application with functionality very similar to theAndroid app that was developed by Altran. A complete system for collecting, handlingand storing data has also been developed.The result from the performance tests shows that none of the methods for generatinggraphs is best in all situations. Which metod that is best depends on the performance ofthe server and the client and also on the bandwidth.

Place, publisher, year, edition, pages
2012.
National Category
Computer Sciences
Identifiers
URN: urn:nbn:se:kau:diva-13629Local ID: DAV C-20OAI: oai:DiVA.org:kau-13629DiVA: diva2:533565
Subject / course
Computer Science and Engineering, Bachelor of Science
Uppsok
Technology
Available from: 2012-06-20 Created: 2012-06-13 Last updated: 2018-01-12Bibliographically approved

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