- Mon Nov 18, 2013 5:01 pm
#165699
I'm creating a pretty interesting project, part of it is to be able to measure altitude from 50' down to about 1' at an accuracy of 1'.
The sensor is going to be mounted to an airplane, as the plane comes in for landing I want to get an altitude call-out, something like:
50', 40', 30', 20', 15', 10', 9', 8', 7', 6', 5', 4', 3', 2', 1'...
Its not for an R/C plane, I'm a pilot and working on a number of sensors (including airspeed, altitude, etc), the problem with using a barometric altitude sensor for this is that small changes in pressure can cause a 5-10' error. Right now the altitude sensor calibrates when the sensor pack is turned on to 0' AGL, but a couple hours of flying or flying to a different location can throw that off.
So I was wondering if there was a sensor out there that can be used like that. The laser sensors don't seem to be a good fit, and ultrasonics seem to only go to about 25'.
The sensor is going to be mounted to an airplane, as the plane comes in for landing I want to get an altitude call-out, something like:
50', 40', 30', 20', 15', 10', 9', 8', 7', 6', 5', 4', 3', 2', 1'...
Its not for an R/C plane, I'm a pilot and working on a number of sensors (including airspeed, altitude, etc), the problem with using a barometric altitude sensor for this is that small changes in pressure can cause a 5-10' error. Right now the altitude sensor calibrates when the sensor pack is turned on to 0' AGL, but a couple hours of flying or flying to a different location can throw that off.
So I was wondering if there was a sensor out there that can be used like that. The laser sensors don't seem to be a good fit, and ultrasonics seem to only go to about 25'.