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![Figure 2.2: Slip stream of the lead cyclist from [2].](publication/359227508/figure/fig1/AS:1133733025456176@1647314425385/Slip-stream-of-the-lead-cyclist-from-2_Q320.jpg)
![Figure 2.4: Example of modelling a road network from [25].](publication/359227508/figure/fig2/AS:1133733025464321@1647314425446/Example-of-modelling-a-road-network-from-25_Q320.jpg)
This is a Masters Thesis completed at University College Dublin, Ireland in 2017 which involved augmenting an off-the-shelf electric bike with sensors to enable new services to be delivered to cyclists in cities. The application of primary interest was to control the cyclist's ventilation rate based on the concentration of local air pollutants. Det...
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... Original 700 36V Electric Bike was purchased from Decathlon 1 . A photograph of the unmodified electric bike is depicted in Figure 3.3. The electric bike specifications when purchased were as shown in 1 https://www.decathlon.ie/original-700-36v-electric-bike-en-s152571.html ...
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... such, it was decided to replace the controller with a Grinfineon C4820-GR 3 controller which made it possible to design a control input. An image of the new controller 4 is shown in Figure 3.4. for electric bike controllers and motors it was required to test the order that both phase current carrying and hall-sensor cables should be connected in order to achieve smooth operation of the motor. ...
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... were added to the bike to measure the variables shown in The data from each of the sensors was read by a data acquisition system called the cycle analyst 5 . The cycle analyst is shown in Figure 3.5 6 . ...
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... custom built data transfer system was designed (with thanks to Mr. The serial data stream from the cycle analyst was wired directly to the RX pin of the RN-41 bluetooth module as shown in Figure 3.11. The bluetooth module was powered 10 From Microchip's RN41 Evaluation Kit User Guide by using a Traco Power DC/DC converter to step down the battery voltage (nominally 36V) to 5V. ...
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... shown in Figure 3.11, data was sent from the TX pin of the bluetooth module to pin A5 of the Arduino. ...
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... PWM signal was then converted to an analog voltage in the range 0-5V using a low pass RC filter. This specific part of the signal conversion is shown in Figure 3.13. The output of the low pass RC filter was then connected to the Grinfineon controller. ...
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... achieved the second data transfer objective of transferring data from the smartphone to the motor of the electric bike. A photograph of the complete data transfer system is shown in Figure 3.15. Figure 3.15: Photograph of data transfer system. ...
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... photograph of the complete data transfer system is shown in Figure 3.15. Figure 3.15: Photograph of data transfer system. ...
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... can be seen from Figure 3.15, the data transfer system was implemented on a PCB (printed circuit board). Since it was required to use the data transfer system while cycling, it was a requirement that it had to be waterproofed. ...
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... was achieved by protecting the data transfer system by placing it in a waterproof box (waterproof standard IP54). The complete sealed box is shown in Figure 3.16. The box was also made from ABS plastic. ...
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... will be discussed in Chapters 5 and 6. In general, the data analysis architecture can be summarised as shown in Figure 3.17. This decision was made because it was deemed that the output of both of these sensors had a higher priority than the output of the smartphone analytics. ...
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... any bluetooth enabled devices were detected, the names of these devices were printed on the screen as part of an ArrayAdapter in a ListView. Screenshots of some of these steps are shown in Figure 3.19. The user was then instructed to select the device that they wished to connect to. ...
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... connect to the RN-41 bluetooth module, the user would select "RNBT-DC85" in Figure 3.19. Once the user selected the device, this initiated the connection process. ...
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... was implemented in order to give the user more control. The system architecture is shown in Figure 3.20. Data from these inputs had to be processed by writing software for the Arduino. ...
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... shown in Figure 3.11 communication between the RN-41 bluetooth module and the Arduino was achieved by directly wiring the two components together. ...
