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asarangan(at)gmail.com
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 Posted: Mon Jun 23, 2014 5:37 am Post subject: Noncontact fuel level indicator |
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Bob
That is a good suggestion. I considered that option as well but didn't
pursue it. I could not figure out a way to cleanly separate the
reflected scatter off the tank faces from overwhelming the detectors.
Perhaps a strip of foam barrier might work.
On Mon, Jun 23, 2014 at 7:34 AM, Robert Borger <rlborger(at)mac.com> wrote:
[quote]
Andrew,
It is one fantastic idea!
Question: Since you are looking at diffused/scattered light not transmitted light, does it require 2 boards or could the whole thing be done with a single board? LED’s down the left side & detectors down the right. Perhaps a light barrier between the emitters & detectors. Less wiring complication that way?
Blue skies & tailwinds,
Bob Borger
Europa XS Tri, Rotax 914, Airmaster C/S Prop (50 hrs).
Little Toot Sport Biplane, Lycoming Thunderbolt AEIO-320 EXP
3705 Lynchburg Dr.
Corinth, TX 76208-5331
Cel: 817-992-1117
rlborger(at)mac.com
On Jun 22, 2014, at 9:12 PM, Andrew Sarangan <asarangan(at)gmail.com> wrote:
Regarding the fuel indicator, I made a brief video to show how it
works. Here is the link: https://www.youtube.com/watch?v=zagLfErDOQI
On Wed, Jun 18, 2014 at 6:51 PM, Paul McAllister
<paul.the.aviator(at)gmail.com> wrote:
>
>
> Andrew, since you are writing code you might like to incorporate compensation tables for the shape of the tank so you get a linear scale.
>
> The system I have is a variant of Tony K's that weights the fuel with a 0 ~ 1" pressure transducer. The fuel sloshing and tank shape compensation is done with a PIC Micro. It has worked flawlessly for 10 years.
>
> Cheers, Paul
>
> --
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peterz(at)zutrasoft.com
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| Posted: Mon Jun 23, 2014 5:53 am Post subject: Noncontact fuel level indicator |
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I would assume that you would lose some of the contrast performance due to light being "conducted" through the tank material itself, regardless of barrier?
Cheers,
Pete
On Mon, Jun 23, 2014 at 9:36 AM, Andrew Sarangan <asarangan(at)gmail.com (asarangan(at)gmail.com)> wrote:
[quote] --> Europa-List message posted by: Andrew Sarangan <asarangan(at)gmail.com (asarangan(at)gmail.com)>
Bob
That is a good suggestion. I considered that option as well but didn't
pursue it. I could not figure out a way to cleanly separate the
reflected scatter off the tank faces from overwhelming the detectors.
Perhaps a strip of foam barrier might work.
On Mon, Jun 23, 2014 at 7:34 AM, Robert Borger <rlborger(at)mac.com (rlborger(at)mac.com)> wrote:
> --> Europa-List message posted by: Robert Borger <rlborger(at)mac.com (rlborger(at)mac.com)>
>
> Andrew,
>
> It is one fantastic idea!
>
> Question: Since you are looking at diffused/scattered light not transmitted light, does it require 2 boards or could the whole thing be done with a single board?  LED’s down the left side & detectors down the right.  Perhaps a light barrier between the emitters & detectors. Less wiring complication that way?
>
> Blue skies & tailwinds,
> Bob Borger
> Europa XS Tri, Rotax 914, Airmaster C/S Prop (50 hrs).
> Little Toot Sport Biplane, Lycoming Thunderbolt AEIO-320 EXP
> 3705 Lynchburg Dr.
> Corinth, TX Â 76208-5331
> Cel: [url=tel:817-992-1117]817-992-1117[/url]
> rlborger(at)mac.com (rlborger(at)mac.com)
>
>
> On Jun 22, 2014, at 9:12 PM, Andrew Sarangan <asarangan(at)gmail.com (asarangan(at)gmail.com)> wrote:
>
> --> Europa-List message posted by: Andrew Sarangan <asarangan(at)gmail.com (asarangan(at)gmail.com)>
>
> Regarding the fuel indicator, I made a brief video to show how it
> works. Here is the link: https://www.youtube.com/watch?v=zagLfErDOQI
>
>
> On Wed, Jun 18, 2014 at 6:51 PM, Paul McAllister
> <paul.the.aviator(at)gmail.com (paul.the.aviator(at)gmail.com)> wrote:
>> --> Europa-List message posted by: "Paul McAllister" <paul.the.aviator(at)gmail.com (paul.the.aviator(at)gmail.com)>
>>
>> Andrew, since you are writing code you might like to incorporate compensation tables for the shape of the tank so you get a linear scale.
>>
>> The system I have is a variant of Tony K's that weights the fuel with a 0 ~ 1" pressure transducer. The fuel sloshing and tank shape compensation is done with a PIC Micro. Â It has worked flawlessly for 10 years.
>>
>> Cheers, Paul
>>
>> --
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tonyrenshaw268(at)gmail.c
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| Posted: Mon Jun 23, 2014 8:52 am Post subject: Noncontact fuel level indicator |
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Hi Andrew,
Thanks for the YouTube video. You’ve got what appears to be a solid prototype. I’m just wondering how easily the strip of LEDs can be installed if the tank has already been put in, if in fact it can?
Regards
Tony Renshaw
On 22 Jun 2014, at 7:12 pm, Andrew Sarangan <asarangan(at)gmail.com> wrote:
[quote]
Regarding the fuel indicator, I made a brief video to show how it
works. Here is the link: https://www.youtube.com/watch?v=zagLfErDOQI
On Wed, Jun 18, 2014 at 6:51 PM, Paul McAllister
<paul.the.aviator(at)gmail.com> wrote:
>
>
> Andrew, since you are writing code you might like to incorporate compensation tables for the shape of the tank so you get a linear scale.
>
> The system I have is a variant of Tony K's that weights the fuel with a 0 ~ 1" pressure transducer. The fuel sloshing and tank shape compensation is done with a PIC Micro. It has worked flawlessly for 10 years.
>
> Cheers, Paul
>
> --
| | - The Matronics Europa-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
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Richard Wheelwright
Joined: 15 Sep 2008
Posts: 111
Location: Halifax, West Yorkshire, UK
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| Posted: Mon Jun 23, 2014 9:18 am Post subject: Noncontact fuel level indicator |
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Just a couple of things to consider ??
The tank will yellow with age will this effect the light?
The tank will also change shape (bulge) the surface you are fitting the circuit boards too will mole her be flat. Will this also cause a problem?
Just thinking out loud!!!
Regards
Richard
[quote] On 23 Jun 2014, at 17:52, Tony Renshaw <tonyrenshaw268(at)gmail.com> wrote:
Hi Andrew,
Thanks for the YouTube video. You’ve got what appears to be a solid prototype. I’m just wondering how easily the strip of LEDs can be installed if the tank has already been put in, if in fact it can?
Regards
Tony Renshaw
> On 22 Jun 2014, at 7:12 pm, Andrew Sarangan <asarangan(at)gmail.com> wrote:
>
>
>
> Regarding the fuel indicator, I made a brief video to show how it
> works. Here is the link: https://www.youtube.com/watch?v=zagLfErDOQI
>
>
> On Wed, Jun 18, 2014 at 6:51 PM, Paul McAllister
> <paul.the.aviator(at)gmail.com> wrote:
>>
>>
>> Andrew, since you are writing code you might like to incorporate compensation tables for the shape of the tank so you get a linear scale.
>>
>> The system I have is a variant of Tony K's that weights the fuel with a 0 ~ 1" pressure transducer. The fuel sloshing and tank shape compensation is done with a PIC Micro. It has worked flawlessly for 10 years.
>>
>> Cheers, Paul
>>
>> --
| | - The Matronics Europa-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
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_________________
Richard Wheelwright
G-IRPW
First Flight 24th July 2013 |
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asarangan(at)gmail.com
Guest
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| Posted: Mon Jun 23, 2014 5:17 pm Post subject: Noncontact fuel level indicator |
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Good questions.
Yellowing of the tank might affect the performance, but as long as it
is still transparent I believe it should work. The yellow might also
mean that it is more optically transparent in the infrared.
Bulging tank will be a problem. I can't think of a solution for that.
A flexible circuit board might be an option.
Regarding installation after the tank has been put in, I don't see why
not. One board can be mounted on the baggage bay bulkhead with a few
drilled holes to allow the light through, and the other board would
need access to the front of the tank, which should be accessible
through the bottom access panel. I plan on attaching the board to the
fuel tank with a few fiberglass brackets glued to the tank.
On Mon, Jun 23, 2014 at 1:17 PM, Richard Wheelwright
<rpwheelwright(at)yahoo.co.uk> wrote:
[quote]
Just a couple of things to consider ??
The tank will yellow with age will this effect the light?
The tank will also change shape (bulge) the surface you are fitting the circuit boards too will mole her be flat. Will this also cause a problem?
Just thinking out loud!!!
Regards
Richard
> On 23 Jun 2014, at 17:52, Tony Renshaw <tonyrenshaw268(at)gmail.com> wrote:
>
>
>
> Hi Andrew,
> Thanks for the YouTube video. You’ve got what appears to be a solid prototype. I’m just wondering how easily the strip of LEDs can be installed if the tank has already been put in, if in fact it can?
> Regards
> Tony Renshaw
>
>> On 22 Jun 2014, at 7:12 pm, Andrew Sarangan <asarangan(at)gmail.com> wrote:
>>
>>
>>
>> Regarding the fuel indicator, I made a brief video to show how it
>> works. Here is the link: https://www.youtube.com/watch?v=zagLfErDOQI
>>
>>
>> On Wed, Jun 18, 2014 at 6:51 PM, Paul McAllister
>> <paul.the.aviator(at)gmail.com> wrote:
>>>
>>>
>>> Andrew, since you are writing code you might like to incorporate compensation tables for the shape of the tank so you get a linear scale.
>>>
>>> The system I have is a variant of Tony K's that weights the fuel with a 0 ~ 1" pressure transducer. The fuel sloshing and tank shape compensation is done with a PIC Micro. It has worked flawlessly for 10 years.
>>>
>>> Cheers, Paul
>>>
>>> --
| | - The Matronics Europa-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
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iancook_1(at)hotmail.com
Guest
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| Posted: Tue Jun 24, 2014 4:10 am Post subject: Noncontact fuel level indicator |
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I have been watching the e-mail string with much interest and would also be very pleased to receive the details. Very happy to make contribution to costs.
Ian Cook
G-CBHI
Europa MG
Sent from my iPad
[quote] On 23 Jun 2014, at 04:25, "Andrew Sarangan" <asarangan(at)gmail.com> wrote:
Will be happy to send you the board layout, schematics and the code.
Let me clean it up a bit so it is a more readable.
> On Sun, Jun 22, 2014 at 10:45 PM, Pete <peterz(at)zutrasoft.com> wrote:
>
>
> An ingenious solution, and perfectly executed. Kudos!
>
> You could sell it easily to the other builders like me, or at least the board layout, and code....(which I'd like to duplicate for each saddle, and add some software error checking etc).
>
> Thanks for the great vid!!
>
> Cheers,
> Pete 
> A239
>
>> On Jun 22, 2014, at 10:12 PM, Andrew Sarangan <asarangan(at)gmail.com> wrote:
>>
>>
>>
>> Regarding the fuel indicator, I made a brief video to show how it
>> works. Here is the link: https://www.youtube.com/watch?v=zagLfErDOQI
>>
>>
>> On Wed, Jun 18, 2014 at 6:51 PM, Paul McAllister
>> <paul.the.aviator(at)gmail.com> wrote:
>>>
>>>
>>> Andrew, since you are writing code you might like to incorporate compensation tables for the shape of the tank so you get a linear scale.
>>>
>>> The system I have is a variant of Tony K's that weights the fuel with a 0 ~ 1" pressure transducer. The fuel sloshing and tank shape compensation is done with a PIC Micro. It has worked flawlessly for 10 years.
>>>
>>> Cheers, Paul
>>>
>>> --
| | - The Matronics Europa-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
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