AIO - Sampling rate

[Railmonitor]

Hello

I am working on a project, where we are looking to sample an analog accelerometer at a rate of 8000-9000 Hz. Is the AIO module able to sample on the analog input at this rate? If yes, how do I access the data on my RPI?

Thanks for the help
Jacob

[mdingena]

I'm certainly no expert, but doesn't the core module have a cycle time of 5 milliseconds? That would mean it's running at 200 Hz?

[volker]

Please read the technical data sheet:
https://revolution.kunbus.de/wp-content ... i_AIO.pdf
(can be found in our shop at the AIO product page).
There you can read:
Input conversion time (data rate in process image): 8…1000 ms (adjustable)
Therefore your aimed signal frequency revolution is far out of range for our AIO which is more a high precision (and therefor slow) analogue input device.

[Railmonitor]

That was what I figured, but I was hoping I read it wrong. Thanks for the answers!

Enjoy your weekend
Jacob

[wennemer]

Hi,
well the AIO module is not made to be used with accelerometers.

But will there be a suitable module in the near future?

[dirk]

Dear wennemer, it depends on the sampling rate of your application if the AIO module is fast enough to handle accelerometer data. Sure for motion applications the cycle time in general is the performance gap here, not a specific module... btw you may read out the cycle time in not rounded ms with

Code: Select all

piTest -r RevPiIOCycle

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[kobusnell]

I also have a question on the sampling rate of the AIO module.

8ms -> 125Hz. Will this be attainable on all channels if all channels are used, or will I only get ~30Hz per channel?

Thanks.