Attended: Mengyuan, Creighton, Scott

• Continued to collect raw data from teensy with one microphone
  • Processed the data via MATLAB by computing the FFT of the raw data
  • Analyzed results of the processed data to see if they matched previous results
• Still unable to interface anemometer with computer programs
  • Tried interfacing through both MATLAB and python with no success
  • After calling the manufacturer, we realized that the anemometer interfaces with a specific software, which we ordered.
• Ultrasound wind sensor
  • Implement a counter to determine time it takes for emitted signal to pass between two microphones.
    • Done via hardware interrupts for two microphones that are triggered when the emitted signal is detected by each microphone. The difference between the clock cycles is the amount of time that has elapsed.

• Currently using a HIGH to LOW transition on the pins to trigger the hardware interrupt. However, this won't work for the waveform because with no noise the voltage out of the microphone is 3.33V/2 = 1.67V (neither a logical 1 or 0)

• To Do:
  • Replicate Andy's test and results with four microphones and in different environments.
  • Compare results against the anemometer.
  • Implement a hardware solution that will output 1 normally and will output 0 when the amplitude of the waveform is greater than a certain threshold.
  • Etch/mill working board by the end of the semester.

Contributing authors:

Created by snishihara on 2016/10/18 10:22.