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==Short Description==
 
==Short Description==
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This project focusses on the development of an unobtrusive multisensory embedded system to assist coaches to better quantify jumping trajectories of athletes. Within the short duration of a ski-jump (< 10 seconds) and exposed to the conditions of nature (snow, wind, temperature) athletes must solve extremely difficult optimisation problems. Flight trajectories of athletes are decisive for victory in a ski jumping competition. They are influenced by the properties of the inrun, the take-off speeds, the applied forces, the athletes’ body position as well as ski edging angles during flight.
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In ski jumping, low repetition rates of jumps limit effectiveness of training. Thus, increasing learning rate within every single jump is key to success. A critical element of athlete training is motor learning, which has been shown to be accelerated using feedback methods. Today, training feedback from coaches is mainly verbal and based on recorded video data. To improve modern feedback methods in ski jumping, we aim to develop a system that collects athlete performance data with a body-worn sensor node and transmits the information to the coach in real time. This requires reliable wireless communication with sufficient bandwidth and range.
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The challenge in this project lies in the combination and synchronization of the sensors and the wireless data transmission between the flying athlete and the coaching tower. In addition, due to the complexity of such a flight situation, the body-mounted sensors and devices must be tiny and barely perceptible to the athlete so as not to disturb his/her sensitive jumping system.  
 
  
 
===Status: Available ===
 
===Status: Available ===
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===Character===
 
===Character===
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: 10% Literature research
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: 60% Firmware Development
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: 20% Sensor interfaces
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: 20% Fieldwork
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: 35% Embedded System Design
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: 10% Hardware evaluation and integration
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: 35% Wireless Communication
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: 10% Data analyses and documentation
  
 
===Professor===
 
===Professor===
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==Detailed Task Description==
 
==Detailed Task Description==
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The main goal of this thesis is to design, build and test a multisensory system to determine jump trajectories of athletes. The sensors should be able to record ski edging angles (e.g., using IMUs) and insole pressures (e.g. using piezoresistive sensors) during approach, take-off, and landing. The acquired data should be sent from the senor node to the coaching tower. According to the level of the student and the chosen thesis type (MT/BT/ST) the work will include some or all following tasks:  
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The main objective of this work is to implement and test a reliable Bluetooth Low Energy Coded PHY radio communication
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[[File:SkiEdgingAngles.png|thumb|]]
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between an existing sensor node and a gateway. Field measurements (also with real ski jumpers) shall demonstrate the performance of the developed system. According to the level of the student and the chosen thesis type (BT/ST) the work will include some or all following tasks:  
  
 
===Goals===
 
===Goals===
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=====Sensors and Acquisition=====
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=====Firmware Development=====
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* Investigation and evaluation of various commercially available sensor technologies (IMUs, pressure sensors).
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* Implement the BLE coded PHY stack on a nRF52 microcontroller (Nordic semiconductors) integrated in an existing multisensor system for ski-jumping
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* Evaluation of the attachment of sensors to skis and in boots.
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=====Characterization=====
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* Use an in-house multipurpose embedded systems controller (Vitalcore) to build & test data collection with sensors.
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Characterization of data transmission quality and identification of losses using BLE coded PHY in various laboratory scenarious:
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=====Communication and Data Transfer=====
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* with increasing distance between source and target
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* Develop a data transfer strategy to
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* with high velocity differences between source and target.
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** collect data from two different sensors, and  
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* Using synthetic and/or real sensor data
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** to transmit synchronized (raw) data to the coaching tower.
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=====Field Test=====
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** Use an in-house multipurpose embedded systems controller (Vitalcore) to test data transfers via BLE.
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* Transfer of the measurment setup on a ski jumping hill.
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** Test data transfer in ski jumping arena situation and revaluate transfer strategy if necessary.
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* Validation of the system in a real-world scenario.  
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=====Assembly and Test=====
 
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* Make a PCB board design for the readout system.
 
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* Design a casing to attach sensors system on the skis or shoes. Aiming for a minimalistic form-factor and weight.
 
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* Test, build and evaluate a working prototype in laboratory conditions and in a real-life environment.
 
  
  
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[[Category:Wearables for Sports and Fitness]]
 
[[Category:Wearables for Sports and Fitness]]
 
[[Category:SmartSensors]]
 
[[Category:SmartSensors]]
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[[Category:WearablesSF_fw]]
 
[[Category:Available]]
 
[[Category:Available]]
 
[[Category:Group Work]]
 
[[Category:Group Work]]

Latest revision as of 12:15, 23 July 2023

SkiJumpingArena l.png




Short Description

In ski jumping, low repetition rates of jumps limit effectiveness of training. Thus, increasing learning rate within every single jump is key to success. A critical element of athlete training is motor learning, which has been shown to be accelerated using feedback methods. Today, training feedback from coaches is mainly verbal and based on recorded video data. To improve modern feedback methods in ski jumping, we aim to develop a system that collects athlete performance data with a body-worn sensor node and transmits the information to the coach in real time. This requires reliable wireless communication with sufficient bandwidth and range.

Status: Available

Students will be co-supervised by the Center of Project Based Learning.
Looking for 1-2 Semester/Master students
Contact: Christoph Leitner, Lukas Schulthess (PBL)

Prerequisites

Embedded systems and PCB design
Microcontrollers

Character

60% Firmware Development
20% Fieldwork
10% Hardware evaluation and integration
10% Data analyses and documentation

Professor

Luca Benini

↑ top

Detailed Task Description

The main objective of this work is to implement and test a reliable Bluetooth Low Energy Coded PHY radio communication between an existing sensor node and a gateway. Field measurements (also with real ski jumpers) shall demonstrate the performance of the developed system. According to the level of the student and the chosen thesis type (BT/ST) the work will include some or all following tasks:

Goals

Firmware Development
  • Implement the BLE coded PHY stack on a nRF52 microcontroller (Nordic semiconductors) integrated in an existing multisensor system for ski-jumping
Characterization

Characterization of data transmission quality and identification of losses using BLE coded PHY in various laboratory scenarious:

  • with increasing distance between source and target
  • with high velocity differences between source and target.
  • Using synthetic and/or real sensor data
Field Test
  • Transfer of the measurment setup on a ski jumping hill.
  • Validation of the system in a real-world scenario.


Practical Details


Links

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