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Design and implementation of a wood measurement system
KTH, School of Information and Communication Technology (ICT).
2011 (English)Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
Abstract [en]

This report presents the development of a computer system for calculating the volume of wood, with the help of air pressure, inside a closed and pressurized chamber. The work has been performed with the company Celite AB who is related to Woodair AB, a previous company who failed to complete the same task. The report also presents some information about the history, the current state, the future and the benefits of the project.

According to the ideal gas law, in a closed system with a constant amount of gas, the change in the pressure, the volume and the temperature of the gas has a proportional relationship with each other. By measuring the difference in pressure and temperature from pressurizing an airtight chamber with an object inside and without an object inside, it should be possible to determine the change in volume for the closed system and then also the volume of the object inside.

The computer system is written as a website using PHP and HTML. The motivation for using these high simplicity languages is simply that more is not needed and also that there is more graphical work to be done by the system than other computational work. The website runs on an Apache web server and is connected to a MySQL database. The website is organized in the MVC pattern. The website shows a page where a user can manually enter measurement values and other arguments. These values are then used to calculate the volume of the object. After calculation all values are stored in the database with a timestamp and id. The computed calculations in the database can then be listed and viewed.

Unfortunately the mini test model was not complete by the time I wrote this report. So instead we tested only the computer system. A so called "sanity test" of the computer system. A "sanity test" means that we test that the computer system responds reasonably to the arguments we feed it.

In the results of the "sanity test" we saw that the system responded as predicted in accordance to the current theory.

In the future will we test the computer system on a real scale mini model.

Place, publisher, year, edition, pages
2011. , 26 p.
Trita-ICT-EX, 201
National Category
Engineering and Technology
URN: urn:nbn:se:kth:diva-48139OAI: diva2:456865
Subject / course
Information and Software Systems
Educational program
Bachelor of Science in Engineering - Computer Engineering
Available from: 2011-11-16 Created: 2011-11-16 Last updated: 2011-11-16Bibliographically approved

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