Highly Accurate driver for the Sharp 2D120X proximity sensor

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I’ve spent the past 5hrs or so writing a driver for the sensor, as the output is not linear but a voltage curve it was rather difficult. I managed to come up with a 3rd order polynomial function that is accurate to within a few millimetres on my sensor.

My driver supports filtering, averaging outputs and moving averages to smooth the output. In addition i created a wiki page with some usage notes and further information.

You can find the driver and more about the sensor on the wiki:
(link removed)

It is now the first sensor in a suite i plan on creating.

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Thank you! ;D

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Let me know how you go with it, i have only got 1 sensor to test with.

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I have of these. I’ll test it later today.

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Thanks for the good work!

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Nice work ;D

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200 points, thanks

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Thanks guys, lots of work but i think it paid off :slight_smile:

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It does. If it does what I expect, this is awesome :o

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I have one of these sensors, too. I’ll try it as soon as time permits.

Wait till Greg sees this. He’s been obsessing over his rangefinders for a while now!

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Nice work Mark,

I tried my hand at creating a driver for that sensor, but t sounds like mine is not as accurate as yours. Mine was about ±2cm

Thanks for your contribution.

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Hi Mark,

You haven’t assigned your project to a category yet - not sure if you did this intentionally.
Makes it very hard to find - I had to use the link you provided in this post.

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Ah thanks RJ i forgot about that. I’m used to ScrewTurn wiki which is .net based and is a whole lot easier… oh well.

Please let me know how your sensors go guys. I’m measuring from the front edge of the sensor to the target.

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Mark, you like ScrewTurn Wiki then? After I get the storefront of my site tweaked in I was wanting to add a Wiki as a way letting customers show off there projects and have a better way to share information (stealing GHI idea for Wiki use :wink: ). Since all of my site is ASP.NET it seemed that ScrewTurn would be the way to go.

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Yep screwturn is great, i’ve used in in a number of internal projects and it’s working brilliant. We use it for our developer documentation at work - you know what icon is stored where on the server (incase you need the original), how to fix some errors on the slaves/masters, general documentation of process… the sort of stuff the clients and mining engineers don’t need access to. Much easier to get going with a page than mediawiki. Mediawiki is ok, but it was created for wikipedia so change is slow and innovation is lacking.

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Good work Mark.

I just posted a thread about this and turned around I see this. I 'll play with my sensor tonight and see.

Thanks!

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MarkH,

Could you add support for this sensor as well: GP2Y0A21YK

What you have is probably the right/organized way to setup a project, but just for sake of simplicity for dummies like me, a single-file driver for each device would be wonderful thing, see if you could simplify that a bit. Yes. having the entire project there still a very neccessary.

Thanks for the work.

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I bought one from sparkfun which should get here next week. I have no use for it, but i wanted to finish my set.

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Mark

That is awsome!!! I have 2 of these sensors and a GP2D12. I know I will use them on every freakin things I do as far as robotics…like building an air plane, a drone, a cruise missile, etc. ;)all of that cool mind blowing stuffs.

Thanks!

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well give me a week and we’ll see how i go with it