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--- wind_sensor:meeting_minutes_feb_17_2017 [2017/02/18 03:48]
mwu [Ultrasonic Wind Sensor]
+++ wind_sensor:meeting_minutes_feb_17_2017 [2021/09/19 21:59]
@@ Line 1: / Line 1: @@
-=====Wind Sensor Team Meeting-February 17, 2017=====
-**Attended: Mengyuan, Creighton, Scott**
-=====Acoustic Wind Sensor=====
-  * Updates:
-  * To Do:
-=====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 comparater circuit