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Measuring forces on a hydropower generator using strain gages
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Electricity.
2015 (English)Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
Abstract [en]

Increased awareness concerning our energy consumption and its environmentaleffects, has led to a high demand for renewable energies. Hydropower providesaround 40 percent of the electric energy consumed in Sweden today. If energyefficiency and production time were to increase only by some percent in thehydropower plants, vast amounts of additional renewable energy could besupplied to the electric grid. The Hydropower group at Uppsala University usesa hydropower generator to localize and decrease some of the power losses andthe wearing in the generator. New equipment is being tested and evaluated onthe generator. By measuring static and dynamic forces in the generator broaderinsight can be reached during these tests.

This thesis describes the development of a system measuring forces on ahydropower generator using strain gages. Each sensor node is equipped withfour strain gages and a signal conditioning circuit. The system measures strain inthe generator, converts it to a voltage signal, amplifies it, filters and transmits it.After calibration of the nodes, forces can be extracted indirectly. This thesisdescribes considerations made during design of the system as well as its differentparts and configurations.

Place, publisher, year, edition, pages
2015. , 29 p.
Keyword [en]
strain sensing, strain gages, measuring mechanical stress, force measurements, hydropower generator, programmable amplifier, voltage to current converter, PGA309, XTR117, EEPROM, I2C interface
Keyword [sv]
kraftmätning, töjsensor, mätning av mekanisk stress, vattenkraft, generator, PGA309, XTR117, EEPROM, I2C gränssnitt, programmerbar förstärkare, spänning- till ström-konvertering
National Category
Signal Processing Other Electrical Engineering, Electronic Engineering, Information Engineering Control Engineering Robotics Energy Engineering
URN: urn:nbn:se:uu:diva-256575ISRN: UTH-INGUTB-EX-E-2015/07-SEOAI: diva2:825901
Educational program
Bachelor Programme in Electrical Engineering
Available from: 2015-06-24 Created: 2015-06-24 Last updated: 2015-06-24Bibliographically approved

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Signal ProcessingOther Electrical Engineering, Electronic Engineering, Information EngineeringControl EngineeringRoboticsEnergy Engineering

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