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Norwegian University of Science and Technology, Faculty of Information Technology, Mathematics and Electrical Engineering, Department of Engineering Cybernetics.
2012 (English)MasteroppgaveStudent thesis
Abstract [en]

This thesis is made upon a request from Cargosafe Systems., where the overall goal is to develop a motion based Data-logger. The project initiated by Cargosafe is developed in collaboration with the Norwegian University of Science and Technology(NTNU). To be able to collect sensor data from motion sensors from user defined placement, it is favourable that the unit is emancipated from cabling and a predefined environment. The thesis is the development of the stand-alone datalogger and tools. The datalogger is based on ``off-the-shelf'' hardware, own made hardware and software developed during the project. In order to produce reliable data, basic understanding of limitation, functionality, calibration and issues regarding motion sensors are presented. The information presented will act as a guideline when designing this type of devices. It is also important to regard these issues due to real tests, to ensure correctness of sampled data. As for now, the datalogger will act as a tool for collecting sensor data, and the collected data are post-processed on a computer. This to reduce load on the unit, and receiving the RAW measurement makes it possible to study the data without loss of information. Custom made C code is used as framework providing the necessary functionality. JavaScript is used for the graphical user interface(GUI). The solution developed in this thesis is now a usable platform for collecting motion data and store these to portable memory. Logging to memory makes it possible to analyse the data after the test have been conducted. The datalogger is battery-operated with long runtime and large data space making it useful for collecting motion from sensors. An effort is made to minimize errors caused by environmental disturbance and errors located in the sensor itself This is a solution to a stand-alone datalogger based sensor fusion system, which is simple, reliable and robust for motion based measuring. Currently, motion sensor platform are created in a variety of applications, but seldom as a total system with local storage capability and battery operated. This add flexibility and ease of use as the device can be mounted at location needed by the user. Here a solution to a datalogger in a small package, with modularity on a platform with a 8-bit controller in combination with high frequency and large program memory in a compact package. Following a simple design with replaceable sandwich approach this system is based on a small number of low-cost components. Its robust performance is achieved by using simple but reliable software.

Place, publisher, year, edition, pages
Institutt for teknisk kybernetikk , 2012. , 114 p.
Keyword [no]
ntnudaim:7114, MTTK teknisk kybernetikk
URN: urn:nbn:no:ntnu:diva-19225Local ID: ntnudaim:7114OAI: diva2:566517
Available from: 2012-11-08 Created: 2012-11-08

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