nexty
January 9, 2015, 2:10pm
1
Hi Folks,
I'm starting here - first message on the board,
I'm currently looking to do something similar has this:
I'm currently having the breaking board version of the MPX Sensor, and I'm able to read random data
the board is a MiniPro,
I'm currently trying to understand how I can do the convertion, that why I'm looking for any advice
thanks for your time reading,
regards,
Maybe this will be a start. wiki/Airspeed
nexty
January 9, 2015, 5:02pm
3
ok so far looking at how to calculate true speed I have:
a_0 = Speed of sound at standard sea level (661.4788 knots)
q_c = Impact pressure (inHg)
P = Static pressure (inHg)
T = Temperature (kelvin)
T_0 = Standard sea level temperature (288.15 kelvin)
I have
#define SEALEVEL_SOUND_KNOTS 661.4788
#define SEALEVEL_TEMP 288.15
float knots = SEALEVEL_SOUND_KNOTS * but then I'm stuck, how I can we get the racine being recocgnize?
thanks again
how I can we get the racine being recocgnize?
I have no idea what do you mean?
nexty
January 17, 2015, 12:42am
5
what the formulas should looks like?
not able to get the bottom of it
thanks
Dynamic pressure = 0.5 * density * velocity2
You can use 1.225kg/m3 for sea level air density. Velocity should be m/s. Pressure will be in Pascals.
Then you just need to calibrate your sensor so you know how many ADC units per Pa.