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--- wind_sensor:meeting_minutes_mar_17_2017 [2017/03/18 01:00]
mwu created
+++ wind_sensor:meeting_minutes_mar_17_2017 [2021/09/19 21:59] (current)
@@ Line 3: / Line 3: @@
 =====Acoustic Wind Sensor=====
   * Updates:
-    *
+    * Soldered new microphones to tests
+    * Began testing algorithm using the new microphones
+      * recalculated coefficients for mapping wind speed to real time process output
+      * calculated using single trials of 5 different wind speeds
+      * New microphones were tested on a breadboard
+      * Results are consistent - algorithm accurately determines wind speeds, but has fairly poor precision
   * To Do:
-    *
+    * De-solder microphones from pcb and see if that fixes the original problem
 =====Ultrasonic Wind Sensor=====
   * Updates:
-    *
+    * Transferred the filtering algorithm onboard the Teensy, so the results display immediately, without me having to copy the values and run the numbers through Python.
+      * Using 1k samples, the results were pretty consistent (varies by around 1 microsecond). However, I noticed that the experiment was **very** sensitive to its surroundings. Even moving my hand around (about 2 feet away) was still enough to cause fluctuations in the results.
+      * The good news is that if I keep my hands still, the results are pretty consistent.
+    * Constructed a 40kHz square wave using a 555 timer and plan to use that to drive the transducer emitter.
   * To Do:
-    *
+    * Gather some data using our current experimental setup.
+    * Start implementing amplifier with the transducers so the Teensy can control the emitter.
+    * Look into using high speed ADC found here: https://forum.pjrc.com/threads/25532-ADC-library-update-now-with-support-for-Teensy-3-1. Only use a limited bit precision to try and get the highest speed.
+    * Look into using thresholding to detect a wave, and then run some ADCs to determine the phase shift afterwards.