=====Wind Sensor Team Meeting-February 17, 2017=====
**Attended: Mengyuan, Creighton, Scott**
=====Acoustic Wind Sensor=====
  * Updates:
      * Completed real time processing algorithm
      * Documented development of algorithm
  * To Do:
      * Test accuracy of algorithm with a single microphone
=====Ultrasonic Wind Sensor=====
  * Updates:
    * Documented the test procedure, readjusted the voltage thresholds to 70% of the maximum value 
    * Implemented wave counting using voltage thresholding and hardware interrupts, for one and then two microphones.
    * Ran experiments involving counting wave periods and the wave-counting algorithm
      * Was able to play a 1kHz signal and have both microphones measure the time it took to count 1000 wave periods
      * Derived the original frequency based off of the number of periods (1000) and the elapsed time (f = periods/time)
      * Results were fairly accurate (mic 1 was generally within 1 Hz and mic2 was within 5 Hz)
      * Because mic2 is farther away, we think that some waves might have been "lost", or didn't have enough energy to successfully trigger mic2 in order to be registered.
  * To Do:
    * Think of ways to improve the accuracy of mic2 (maybe use a louder source?)
    * Implement the algorithm to derive the propagation time between mic1 and mic2 (and thus the wind speed).
    * Create a Schmitt trigger using an op-amp and replace the comparator circuit