Home > hardware, progress reports, software > measuring airspeed

measuring airspeed

MPXV7002DP is great sensor for airspeed measurement, however it gives only difference between two pressures as output, hence you can use it only for calculating calibrated airspeed(CAS) as you don’t know value of the static pressure inside aircraft. To calculate true airspeed you need to know current static pressure, and current air temperature which both are changing due to altitude. To measure it I will use FREESCALE SEMICONDUCTOR – MPX4100AS.  Third IC used for airspeed sensor is temperature sensor LM50B. There will be three different voltages on output,

1. Impact pressure – differential pressure from MPXV700DP

2. Static pressure from MPX4100AS

3. Temperature from LM50B

directly connected to 3 channels of built-in analog-digital converter AD7918

I’ve created as well C++ algorithms for calculating both calibrated airspeed(CAS) and true airspeed(TAS). You can find them on my another blog.

  1. No comments yet.
  1. No trackbacks yet.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

%d bloggers like this: