Detta är ett examensarbete på 7,5hp för CAD-Tekniker programmet på Högskolan I Halmstad. Gruppen har fått som uppdrag att ta fram en prototyplösning för en handikapsanpassad cykelpedal till en privatperson i Halmstad. Användaren kan inte böja sitt knä helt och kan inte använda en normal cykelpedal för höger ben. / This is a thesis report of 7,5hp for the CAD-Technician program at Halmstad Univeristy. The group was tasked with developing a prototype for a bicycle crank for an individual in Halmstad. The user has a bad knee, unable to bend it fully and is unable to use a normal crank for the right leg.

This report will describe the development of a subsystem for force measurement on bicycle pedals. The force is going to be used as a control parameter in a motor controller to control an electric motor on an electric bicycle. The report focuses on force measurement and will not process any control system. There has also been a survey of alternative power supplies to the circuit boards to be used in this project. Energy Harvesting has been investigated as an alternative source. The aim of the project is to measure the force applied on the pedal in a good way for use in a control system.This work resulted in that the force applied on the pedals was measured on the crank arms. The force was being measured by strain gauge sensors in a test rig designed in this project. The force signal can be used in the intended control system. This report has explained when, during a pedal stroke, the force should be measured. Processing of the signal will be done furthermore in the motor controller to fit the requirements set by the control system.