Datalogger for LVDT outside

Projects General Guidance
1

Hi!

I was thinking of making a datalogger with a arduino. I want to log a LVDT sensor and a temperaturetransmitter.
This will sitt on a bridge outside for a couple of months.
I was wondering if the arduino would work in a industrial enviroment, is the arduino reliable enough.

I think i know how to do it in practice, but i just have to figure out how to save energy because of the long time it will be in operation.
And in general how to use batteries and which batteries to use.

The main issue I was hoping to get an answer about is if the arduino is reliable enough to use twoards a costumer.

If anyone is curious about details about project, im glad to elaborate.
If anyone has any tips, I'm open for suggestions

Thank you in advance!

2

Something like this could be reliable enough.

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An ESP could be the best choice since you can use the sleep mode.

About battery, there's many examples of solar and battery powered projects over the internet.

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3

Hi

That looks great! Do you know where i could find this?
That looks perfect.
@FernandoGarcia

4

Google is your friend.

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if you are logging the data what do you do with it? write it to an SD card? transmit it over WiFi or LoRa?

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For sure an SD card. Might use something like LoRa later. But I'll start with SD.

I've looked at arduino datalogger shield etc. But im not sure if it will be reliable and give good results

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The arduino will be fine if properly protected. That enclosure looks like something that you can find at Polycase.

I'd be more concerned about the LVDT. They're not exactly power-sipping unless you can control the excitation and only turn it on periodically. What are you using to interface arduino to an LVDT?

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Ok thank you. That looks like a great site aswell.

Yes the LVDT will for sure draw some power. Im hoping to figure out a way to turn it off.
The frequency of my measurements wont be high. Just over a long timeperiod.

My initial idea was to just interface it directly since the LVDT runs on 5v aswell. But i might either need a relay for the 5v to the LVDT, or i was hoping there was a sleepmode or something for the aruduino which would turn of the LVDT aswell.'

Im thinking of using an arduino uno with a datalogger shield ontop with a RTC battery.
Then because of lack of sun, just use batteries, and maybe change them when needed
Im open for better solutions as i have not spent to much time planning this

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Does your LVDT already have the sensing electronics built in?

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Then start with the SD issue at the beginning.

First, design an Arduino setup, that has deep sleep capability, and is also able to power down the SD card.

Maybe when that is done, consider the rest of the project.

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The version im planning to use has builtin electronics for 0-5V

12

Yes, agreed.

That might be a good place to start

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