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Cricket Ball Line and Length Tracker

Cricket Ball Line and Length Tracker. Chris Chester. Corridor of Uncertainty. Hard to for a batsman to play. Just outside the offstump. Pitched 3/4 of the way down the pitch. corridor of uncertainty: PitchVision (2011). 1 st Design : Using Pressure Sensor Pad . Issues:

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Cricket Ball Line and Length Tracker

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  1. Cricket Ball Line and Length Tracker Chris Chester

  2. Corridor of Uncertainty Hard to for a batsman to play Just outside the offstump Pitched 3/4 of the way down the pitch corridor of uncertainty: PitchVision (2011)

  3. 1st Design : Using Pressure Sensor Pad • Issues: • Bulky – would alter the trajectory of the ball • Costly – Pads cost more than $40 each

  4. 2nd Design : Using Capacitive Pad • The ball causes the distance to decrease • Therefore the capacitance will increase d d

  5. Calculating Capacitance Internal • Microcontroller used to detect capacitance • Uses RC time constant • Set up internal clock to count ticks

  6. Detecting Changing Capacitance • Calibrate the Pad • Look for Change in amount of ticks • Activate feedback • Recalibrate 300 50 100

  7. Observations and Future Considerations • Effective • Cheap • Thin • Multiple Uses • Better interface to the bowler • Remove alligator clips

  8. Conclusions • Pressure Mat had several issues • Capacitive Sheet was a cheap, thin solution. • Utilised the Capacitive sensing function of the microcontrollers • Offers several different alternatives

  9. Extra Info • PIC16F1827 by Microchip • Speed = 250kHz • Cost is about $7 W/O LEDs

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