Differencses in amplitude in Booms

Hi,

We are using two Raspberry Booms in our research to collect data, but we experience a large difference in our data. The amplitude difference is by almost a factor 10 between the two booms. Even if we use wind reduction system on the boom with the highest amplitudes, the amplitudes is still way higher than the boom right next to it without a WRS.
We also tested this in our lab, just to confirm that there is a problem.

Do you have any recommendations to fix this probelm?

Hello bjorn, welcome to our community!

Thank you for contacting us about this. It is indeed unusual, since their performance should be the same if they are located in the same spot (or, at least, close enough that the difference between the two is not created by their different positioning, as I am sure you have already checked).

Could you please post a couple of pictures for each BOOM, to verify that the microbarograph filter (the red one, if you haven’t switched for your research purposes to the yellow one) is in the correct place?

Could you also post sample datasets (even screenshots are all right, as long they show the discrepancy you are describing) and the logs from both BOOMs? You can download the log files following these instructions: Please read before posting!

Thank you!

Hi, thank you for the welcome and reply.
Form the hardware perspective, I can se a dent in one of the red tubes in boom 1, but this is actually the boom we are getting the “expecting” results.

Here are the pictures of the Booms:

Log files:
RSH.RCF56.2021-10-08T12_02_34.logs.tar (2.8 MB) RSH.RF32E.2021-10-08T11_51_03.logs.tar (3.3 MB)

Picture results:
Skjermbilde1

The time and date is:
UTCDateTime(‘2021-10-06T13:08:20’)

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Hello again bjorn,

Thank you for both logs and pictures, and also for that very interesting data visualization of the two signals!

I will pass them to our hardware team so that they will be able to check that there is nothing wrong with the microbarograph setup. I will update you as soon as I have news from them!

Thank you for your patience.