Collision Monitoring and Alarm in Ice-Hockey
Sähkötekniikan korkeakoulu | Master's thesis
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TLT - Master’s Programme in Communications Engineering
AbstractFull contact sports are inherently dangerous as they involve tough collisions between players. Wireless and sensing technologies have the potential to reduce the risk of severe injuries in athletes by alarming the harshness of each collision between players to a medical team that can deal with this issue instantly, instead of allowing this hit to develop to a serious injury. Ice-Hockey is used as the basis of the experiment in this Master Thesis, since it is the highest contributor to brain injuries in sports and a source of devastating chest injuries. In order to achieve the goal of proposing and evaluating a sport safety system that can monitor and alarm the collisions between players to a medical team, several important questions were put to define the road-map of the research. Initially, a survey on the state-of-the-art sport safety systems has been made. The result of this survey shows that there is only one commercially available system: Head Impact Telemetry (HIT). Then, based on the study of HIT and its related products, several justified system requirements have been listed. Add to that, the applicable wireless and sensing technologies were benchmarked against the developed system requirements. This benchmarking resulted in selecting accelerometers and Bluetooth Low Energy (BLE) for the proposed system. In addition, a theoretical evaluation was made to the proposed system to find the Bit Error Rate (BER), Packet Error Rate (PER), average packet transmissions, average packet delay and packet loss percentage in AWGN, Rayleigh and Rician channels. The system evaluation results show that the proposed system with limited transmissions performs better than the system with infinite transmission attempts in both cases: no interfering users and one interfering user, over the stated channels. The limited transmission attempts system gives lower packet delay and less number of packet re-transmissions. However, this limited transmission attempts system introduces packet loss. Also, it has been observed that small packet size selection reduces the latency and transmission attempts. Therefore, this system offers the Ice-Hockey community with a cost-efficient and reliable solution to the players’ collisions monitoring and early diagnostic problem. Consequently, this may lead to reduction in total severe injuries and increased player career duration.
Thesis advisorJäntti, Riku
ice-hockey, BLE, collision monitoring, SFH-GMSK