My first post on my new PC!
So my power supply on the old PC blew, zapped and caused a noise, and I decided that it was about time I got a new one. It had lasted me 7 years, overclocked for all of that and had about 14000 hours on it. She had a good [...]
Long time no post!
After a period of about 3-4 months which was spent on the bubble forcing idea, it was decided that it wasn’t going anywhere and it was cancelled. This meant that I had lost a great deal of time and needed to make it up. So, whats been going on recently:
Euronoise paper on [...]
Update on what I have been doing over the Christmas period, including impact detection, more anechoic testing and more 25m drop testing!
I have bought the final tank! Another milestone passed!
I now have two tanks, the small box that was used for the stairway experiments and the new 0.8m diameter circular tank, on the roof collecting data. The small box is still lined in the anechoic, but the large is not. Because of this, we get lots [...]
I have just computed the absorption coefficients for the drop impacts, instead of a pulse generation.
To do this, I imported the raw drop data into Matlab and manually set all of the areas that had any bubble noise to zero. Then I went back to my software and averaged the pulses like before. Back in [...]
I have now completed the anechoic lining tests and reached an acceptable combination of materials.
To recap, over the last couple of weeks I have used an audio frequency amplifier to increase the transmit power of the pulsed tx signal. I expected this to provide poor results since the pulse was 6.6 uS long, hence providing [...]
For about 2 weeks now I have been struggling to find a test that I could perform to ascertain the absorption coefficient in a small tank. The problem is that this tank is only 0.5 m x 1.5 m x 0.3 m and most tests are producing spurious reflections that are masking the reflection that [...]
Just to remind myself for next time, when entering variables into windows’ PATH, all entries seperated by a semicolon MUST NOT have a space in between. If you do then the compiler (mingw32-make) complain about:
‘g++’ is not recognized as an internal or external command
The Final Preamplifier for the acousic disdrometer has been designed and built and is working well. Below are a few pictures. The only thing that I would do differently next time is make the whole thing single supply rather than dual supply. Becuase I have used a rail splitter and connected the ground from that [...]
I tried to get the open-source drivers working, but it just messed things up. So I used this guide to install the propriatey drivers.