Data Acquisition System

[Caito]

Hi guys. As a final project for Electronics Engineering I'm thinking about making a data acquisition system. Rather than making the software I'd rather use an open source one. Do you know of any?

Thanks,
Caito.-

[Greg Locock]

No I don't, but you could write one in Octave, an open source Matlab equivalent.

[gixxer_drew]

No I don't, but you could write one in Octave, an open source Matlab equivalent.

Open source DAQ: http://www.autosportlabs.net/Main_Page

Also, you can license Motec I2 with an import license.

[Caito]

No I don't, but you could write one in Octave, an open source Matlab equivalent.

We're capable enough of writing it in C/C++ or MatLAB. The problem is that to make a good software, user friendly, requires lot's of boring programming. It poses no challenge and it's just about letting the user drop graphs, bar, windows, etc. That would account for at least half of all our available time.

So our intention was to look for open source software, or some format that could be read by other free software.

<span>Open source DAQ: <a class="smarterwiki-linkify" href="http://www.autosportlabs.net/Main_Page" ... </a></span>

Also, you can license Motec I2 with an import license.

Thanks, I'm checking both options. Will let you know if it works.

[andylaurence]

How about Xoomcentre? It's free and supports importing of data in CSV format. It's also easily extensible with Javascript plugins.

[Caito]

How about Xoomcentre? It's free and supports importing of data in CSV format. It's also easily extensible with Javascript plugins.

Yup, that would basically work, but we have decided we will long the long road and do it ourselves.


I'll probably build another post soon, but to give a heads up.. with a friend, as a final career project we're building a data logger system.
We're only beginning yet, defining sampling ratios, amount of channels needed, standards used, etc.

[andylaurence]

Brilliant. Do keep us posted with your progress. I'm currently looking for a new logger if you want a test subject!

[Greg Locock]

Can i suggest you use the same data sampling rates as a commercial system? What programming language have you decided on?

[Caito]

Can i suggest you use the same data sampling rates as a commercial system? What programming language have you decided on?

Everything is under evaluation. Do you mean using AT LEAST the sampling rates of commercial systems, or the same? That will most probably be configurable.

Software per se will probably be C++, while the microcontroller is programmed in C and/or Assembler.

[Greg Locock]

No, exactly the same.

[Caito]

No, exactly the same.

Why? For comparison reasons?

[Greg Locock]

Basically to save you and your users work. Downsampling from 1024 Hz to 1000 Hz sampling rate is a PITA, and guess who gets to do that?

[Caito]

Sorry greg I'm not totally getting your point.

Why would you downsample? What would be wrong with 1024Hz that needs to be downsampeld to 1000 Hz?

[Greg Locock]

OK, probably not something that comes up much but it so happens I do need to do just that due to poor design of two systems.

[Caito]

Oh, that's clearer now. Anyway, the sampling frequency would be user selectable so you can basically use what you want up to some predetermined limit.