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.