Hi there -
For my major design project in Year 12 as my final year of school I’m looking to create a failsafe parachute device that can be attached to my drone (DJI Mavic Pro / DJI Phantom 3) which will release when there is a sudden drop in altitude detected.
The issues that I’d love some help on at the moment are;
- Would using the BME280 sensor to detect pressure variations be accurate enough? I did some research and found that there is slight variations in pressure constantly when using the feedback monitor in Arduino. However to combat this I can just set the threshold to deploy the parachute to be, for example say > than 10 pascal instead of 0.05 variations…
My plan is to have the arduino board trigger a servo that would release a spring-loaded parachute from a cylindrical compartment that is attached to the drone and this would be triggered by detecting a significant drop in pressure (height) in a small amount of time. Obviously, I’ll be factoring in the drone’s maximum descend speed to avoid false-positives.
Last question if I may - would it be easier to use a GPS module that can detect height or perhaps an altimeter instead of the pressure sensor? (my pressure sensor method sounds old school but I think would score more marks in HSC)
Any input would be amazing!
Attached is the output monitor from Ardunio showing some pressure variations over an average of 10 readings…