cricket ball line and length tracker
DESCRIPTION
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: - PowerPoint PPT PresentationTRANSCRIPT
Cricket Ball Line and Length TrackerChris Chester
Corridor of Uncertainty
corridor of uncertainty: PitchVision (2011)
Just outside the offstump
Pitched 3/4 of the way down the pitch
Hard to for a batsman to play
1st Design : Using Pressure Sensor Pad
Issues:• Bulky – would alter the trajectory of the ball• Costly – Pads cost more than $40 each
The ball causes the distance to decrease
Therefore the
capacitance will increase
2nd Design : Using Capacitive Pad
d
d
Calculating Capacitance Microcontroller
used to detect capacitance
Uses RC time constant
• Set up internal clock to count ticks
Internal
Detecting Changing Capacitance Calibrate the Pad Look for Change in
amount of ticks Activate feedback Recalibrate
50
100 𝜇𝑠
300
Observations and Future Considerations Effective Cheap Thin Multiple Uses
• Better interface to the bowler
• Remove alligator clips
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
Extra Info PIC16F1827 by Microchip Speed = 250kHz Cost is about $7 W/O LEDs