Speaking of sealed case, and heating issues. Why not fill the area where the BBB will sit with non conductive oil ? No idea if this is being done "professionally" but it's been done with PC motherboards before . . .
On Mon, Jul 13, 2015 at 8:42 AM, CEinTX <[email protected]> wrote: > Otto, > > This will prove to be an interesting challenge for you. > To handle your environments, you will likely need to enclose whatever board > you choose in an IP67 or Nema 4 sealed enclosure. I don't think potting > or conformal coating will suffice if you have salt and/or potential for > condensing > humidity. Serviceable contacts will eventually corrode (Power, Enet, uSD, > etc...) > > So when you enclosure your board you will have the potential to exceed the > 70*C > inside the enclosure. Ambient plus the thermal load of the board. > So, unless you use some form of active cooling transfer - not sure that > will help with > the condensing humidity or the saline. If you use thermo-electric > (peltier) you damn > better make sure you get 100% sealing or you will condense on your > internal heat(cool) > sink and eventually your enclosure will fill (been there done that). If > you are not 100% > sealed, thermal cycling will pull moisture in - condense on the heat sink > and fill the enclosure > Until something if not everything fails. > > So you will likely need industrial (+85) if not automotive (+105) temp > components - probably will need > testing to determine which will be needed. > > Next, I haven't heard of 128GB uSD cards being supported on BBB. I'm sure > the community will chime > in on that one. So you will likely need a bank of FLASH memory. Or create > a process that will fill what > you have/put on the board and periodically download/stream to a server or > the like. > > The IP67 or Nema 4 case will aid in longevity and reliability except in > the regards of heat. > Use the appropriate connectors to get you network and power inside and all > should be good. > > There are likely other systems out there that can potentially handle this. > You'll just have to do research. > > Alternately CircuitCo or some other companies can do a custom version of > the BBB that > can meet your needs. > > I could even do this as I've done an industrial temp version of the BBB > customized for my > company's needs - just not sure if I'll have time to do it. It could > potentially be modified > to meet your memory needs. So as long as you don't need functioning in > temps above > +85*C a variation of it could work for you. > > If you decide you want/need a custom board and are not going to do it > yourself, please give > CircuitCo the 1st chance at this since they do so much to support this > community. > > Best of luck to you in your endeavor, > Matt > > On Monday, July 13, 2015 at 9:10:10 AM UTC-5, [email protected] wrote: >> >> Hi all! >> >> I'm working for a wind turbine manufacturer, and I want to set up a >> super-robust data acquisition system. Basically it needs to: >> >> - receive about 200 channels, single precision, 10-50 Hz through wired >> network >> - store data for some time (I need about 128 GB storage ideally) >> - process it into secondary (much smaller) data summaries >> - and then the data summaries will be transferred over the wind farm >> network. >> >> Although it will be installed inside the turbine, conditions are still >> harsh: >> >> - Temperatures may range from about -20 to +70 C >> - condensation/humidity may be an issue >> - offshore use is also planned so salinity could be an issue. >> >> Lifetime should be long, say 10 years, with no/very few manual >> interference. I want to have about 2000 units in the next year. >> >> What do you think, will the BBB be an option for this task? Is airtight >> (and pressure resistant) casing available to avoid >> condensation/humidity/salinity issues? Is a micro SD card robust enough >> when inside this airtight casing? >> >> If the BBB is too hobbyist for my purpose, do you know a more robust >> system that I could use? >> >> Thanks for the help! >> >> Otto >> > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to the Google Groups > "BeagleBoard" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/d/optout. > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
