maesoph
Posts: 5
Joined: Mon Dec 11, 2017 4:13 pm

Raspberry Pi Data Acquisition - 50KHz or Higher

Mon Dec 11, 2017 4:15 pm

Fair warning - mechanical engineer here so this is just my "hobby" to support my other hobbies.

Looking to acquire data at minimum 50KHz - three channels at most. Would like a "hat" for a Raspberry Pi or some other plug in device. I have done a bunch of Googling and have been disappointed in the results. Only needs to be 8 bit data. This will be interfacing with some 3mm break beam sensors for measuring the velocity of a Mach 1 ping pong ball. Would like to acquire the data and display it on a screen for the kids to see. Screen I can handle, just need help with the data acquisition.

Mike

maesoph
Posts: 5
Joined: Mon Dec 11, 2017 4:13 pm

Re: Raspberry Pi Data Acquisition - 50KHz or Higher

Mon Dec 11, 2017 9:53 pm

Looks like this is the best option.

https://www.mccdaq.com/usb-data-acquisi ... eries.aspx

Thanks for looking. I'll let everyone know how it works, but they do have Linux support and a quick start guide for Raspberry Pi so I am not expecting problems.

Paul Hutch
Posts: 277
Joined: Fri Aug 25, 2017 2:58 pm
Location: Blackstone River Valley, MA, USA

Re: Raspberry Pi Data Acquisition - 50KHz or Higher

Tue Dec 12, 2017 12:39 am

Those look nice, they are a local company and I've heard good things about their product lines from other engineers.

maesoph
Posts: 5
Joined: Mon Dec 11, 2017 4:13 pm

Re: Raspberry Pi Data Acquisition - 50KHz or Higher

Tue Dec 12, 2017 12:44 am

Thanks for the feedback. Probably order this coming payday! Looking forward to this.

IanS
Posts: 190
Joined: Wed Jun 20, 2012 2:51 pm
Location: Southampton, England

Re: Raspberry Pi Data Acquisition - 50KHz or Higher

Wed Dec 13, 2017 4:01 pm

A Mach 1 ping pong ball? How?

maesoph
Posts: 5
Joined: Mon Dec 11, 2017 4:13 pm

Re: Raspberry Pi Data Acquisition - 50KHz or Higher

Wed Dec 13, 2017 4:14 pm

https://www.instructables.com/id/Vacuum ... personic-/

He claims Mach 1 results, but I see a slight flaw in his testing method. That's why I want the break beam sensors. Won't have the same issue with those.

nospam
Posts: 45
Joined: Sun Jun 14, 2015 10:38 pm

Re: Raspberry Pi Data Acquisition - 50KHz or Higher

Mon Jan 01, 2018 4:24 pm

Take a look at BeagleBone black and it's variants if you are looking for high speed DAQ....these devices feature a PRU and can operate independent of your OS.

beagleboard.org

maesoph
Posts: 5
Joined: Mon Dec 11, 2017 4:13 pm

Re: Raspberry Pi Data Acquisition - 50KHz or Higher

Mon Jan 01, 2018 5:55 pm

Nice!!!!! Keep in mind I am a mechanical engineer so have to keep my electronics as simple as possible. I will keep this in mind for future use!! For now, I am using USB-204 plugged into my plain old Windows laptop - totally bourgeois I know, but it works for now.

nospam
Posts: 45
Joined: Sun Jun 14, 2015 10:38 pm

Re: Raspberry Pi Data Acquisition - 50KHz or Higher

Tue Jan 02, 2018 2:42 pm

Just a warning - the beaglebone support community is small and everything is more "bleeding edge" so don't expect much in terms of software support like you see for the Pi. Hardware wise it's got great features on paper but implementation can be a hard slog as there is little to no support. Complete documentation can be sparse. Thankfully they've moved to Debian meaning it's easier to get OS support.

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