pupbot genevieve carre october 31st, 2013. content objective of special sensor inspiration summary...
TRANSCRIPT
PupBot
Genevieve CarreOctober 31st, 2013
Content• Objective of Special Sensor• Inspiration• Summary of Approach– Microphone sensor– Bandpass filters– Development– Status Update
Objective• Send commands to robot• Receive Feedback– Robot Behavior depends on command• i.e.– Start – Spin– Stop
Inspiration• i-SODOG – Small robotdog – Japanese manufacturer Takara Tomy – Sales began spring of 2013 in Asia – Many preprogrammed entertainment movements– Understands 50 voice commands– Can learn new behaviors– http://www.robots.nu/i-sodog-small-robotdog-of-
tomy/
Summary of Approach• Microphone Sensor– Electret Microphone Amplifier - MAX4466• 20-20KHz• Ideal for audio-reactive projects
Summary of Approach
• Initial Stages– Angel Recorder
Summary of Approach• Bandpass Filters– Pass Frequencies within a certain range– Reject Frequencies outside that range– Necessary since each command is assigned to a
specific frequency range
Development• Filterpro– Guide for part values
• LTSPICE– Simulation analysis• FFT algorithm
– finds the frequency components of a signal (by converting to frequency domain)
Development
• LTSPICE schematic – BP filter with fc=400Hz
Development• LTSPICE simulation – BP filter with fc=400Hz
Development
• LTSPICE schematic – BP filter with fc=1kHz
Development• LTSPICE simulation – BP filter with fc=1kHz
Status Update
• Smartphone App to generate signal at constant frequency
• Filter signal picked up by microphone• Assign commands to frequencies read in by
MicroController– Preprogram actions based on commands
Status Update
• Debug Code provided as well:– At 400Hz, turn on LED (equivalent to start
command)– At 1000Hz, turn LED off, wait 1 sec, turn LED on,
wait 1 sec, turn LED off
AnyQuestions?
Thank you for listening!