Question about the optical altitude sensor

[Konrad]

The GeoLink V2 has a barometric and optical altitude sensor. When exactly is the optical laser sensor active or relevant? When the helicopter lifts off the ground, there is an overpressure under the blades and therefore an altitude of about minus 2m is displayed by the barometric sensor. The optical sensor could indicate the correct altitude near the ground. So far I have only seen that the optical sensor is active during automatic landing.
It is an effort to attach the GeoLink to the tail tube so that the optical laser sensor has a view to the ground. If this is useless, I can mount the GeoLink more easily.

[Konrad]

Now that version 4 is ready, please, I would like to get an answer to my question. Simply said: What do you need the laser sensor on the geolink2 for? Is it worth the effort to find a special position for GeoLink2 so that the laser sensor can see the ground? So far it has only been useful for auto landing, which I don't use.

[franz88]

if it can help I created a support for geolink with corner to clear the view laser
https://www.spirit-system.com/phpBB3/vi ... =21&t=5701
from what I understand the laser help from the ground up to a certain height (5or6 meters i think)

[senaka]

Now that version 4 is ready, please, I would like to get an answer to my question. Simply said: What do you need the laser sensor on the geolink2 for? Is it worth the effort to find a special position for GeoLink2 so that the laser sensor can see the ground? So far it has only been useful for auto landing, which I don't use.

I don’t own a geolink but with some years of building autonomous drones I believe this extra sensor should give a more precise controlled rate of descent. The last few meters is when precision is needed for a smooth landing where often the combination of a barometer gps altitude and accelerometers may be a bit imprecise at low near ground altitudes.

[ZeXx86]

Hello,

Laser sensor can help mainly at closer proximity to ground to accurately find out altitude.
Within 8m the sensor is able to measure with mm precision how close it is. In a real world conditions it is suitable for 0 - 2m sensing due to sun light/terrain disturbances.
It will mainly help for autolanding feature where sensing close proximity is needed perfectly.

For upcoming updates we will be focusing on new GeoLink features, including manual selection which sensors should be used and for what purpose to achieve the best performance for each model. Also we will be able to achieve same level of precision as drones in new version.