Hey there,
thanks for this awesome community and thanks for those who Keep this runnig!
I am trying to get the PX4Flow Sensor to run on my quad but the result is not good yet. I think the problem is that I am not using a LIDAR for height measurment.
Here my Setup:
Pixhawk 2.1
ACopter 3.5.3 (now 3.5.4, did not a testfly yet)
PX4Flow without LIDAR
Unfortunatly there is no LOG-File of the last flight, let me try to explain what happend:
-I put the Quad in place and armed in loiter mode
-sometimes it started to accelerate and keep the position in 1m height.
-then it drift away a bit and i switched to stabelized and land
-back to loiter on the ground sometimes only one side accelerate so that the props touched the ground or the drone shoes some other unpleasent behavoir
–> So in conclusion it seems to me that the drone got some proplems to get a proper height measurement
After Research (PX4Flow for multiple purposes) and reading the instructions it is clear that a LIDAR get highly recommended but that is a few days ago, and so I am wondering is there any possibility to get this run without LIDAR or with cheaper additional hardware?
Hi ppoirier,
thank´s for your answer. Correctly it is written in the Manual. But sometimes I seems the Manual is not complete and up to date (that´s my Impression so far). So I just want to ask if someone got some different expierience. I did another test flight and it´s very clearly that the pixhawk can´t Keep the Level without a exact measurement.
I can garantee that each and every steps are required
The Lidar distance signal is consumed by the EKF to scale the Optical Flow as well, so no rangefinder = no opticalflow.
Hi James,
thank you, that what I was looking for. But nevertheless I think I will buy a LIDAR directly and go straight for the propper way :-). I am struggling between LIDAR Lite V3 and TeraRanger One. Any advise or recommondation for these ones?! I think both will do the Job, but for the TeraRanger I do Need a I2C Adapter cable and possibly a USB Adapter cable. That means extra Money and maybe extra weight.
I haven’t used either of those: the earlier LidarLite had problems which I’m not sure have been resolved, and the Teraranger I don’t know much about (although I’ve used their Tower in a build, which worked better than I’d expected). I’m considering looking at the benewake TFMini. I think @ppoirier has tested them out.
Lidarlite v3 is working fine, its I2C and recommend using a decicated supply and capacitor
Benewake TFMINI has a relexion problem on short range making it useless under 40cm
Teraranger I havent tried
