Thermal Tests
To determine whether a companion pc is capable for use in a closed capsule inside the drone, the temperature, power usage + ???( e.g. run algorithms) needs to be measured which is needed in a similar setup.
Methodology
put the unit into a box
connect camera
trigger a camera shot every second
measure temperature by using onboard sensor
measure average power usage by using external power meter
run the test for at least 30 minutes
Results
Pi4B
Powerusage: 2.9W
Take Photo:
raspistill -t 1800000 -tl 1000 -o image%04d.jpg
Temperature:
/opt/vc/bin/vcgencmd measure_temp
Pi3B
Powerusage: 2.3W
Take Photo:
raspistill -t 1800000 -tl 1000 -o image%04d.jpg
Temperature:
/opt/vc/bin/vcgencmd measure_temp