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Design Challenge : accurately measure several liquids in a container

Catwell
It has been a while since my last Design Challenge to the community, but it's time to get back into the groove and working the prefrontal cortex. Innovation is spurred through creative thinking, so give it a shot even if you don't reply.
 
Similar to one I proposed in the past, Measuring liquid inside a closed container, but now you can put anything you want into the container. But it isn't that easy. I want to measure two different liquids that a present in the container, water and oil.
 
Here are the requirements:
1. Monitor a container that is between 10-15 feet tall and 10 feet in diameter
2. Report the whole volume of liquid in the container
3. Report the amount of water, or water level
4. Report how much total oil is present
5. Constantly measure changes
6. Report back with an accuracy of about a 1/10th of a gallon. (or as accurate as possible)

 
 
I have a few ideas, but I don't want to contaminate early ideas with my own.

 
 
There is not right or wrong answer, so give it a shot.

 
 
Cabe


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    A possible solution could be the  measurment of resistivity change using a vertically inserted small  electrodes from the top of the container  (controlled by a motorised  system allowing a fine control and measurment of the level of insertion  of the electrodes within the container).

    We will notice a resistivity change when crossing interfaces between air, liquid1 and liquid 2.

     

    An  enhancement of this solution could be to use a laser telemeter from the  top to measure height of the the two liquids togheter.... when this  level changes we control the electrodes system at the interface between  liquid 1 and liquid 2 so that we avoid that the electrodes system be  continiously moving up down and down up for  real time measurments. It  just needs to be moved to monitor the liquids interface height change.

     

    Lotfi

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  • 0

    A possible solution could be the  measurment of resistivity change using a vertically inserted small  electrodes from the top of the container  (controlled by a motorised  system allowing a fine control and measurment of the level of insertion  of the electrodes within the container).

    We will notice a resistivity change when crossing interfaces between air, liquid1 and liquid 2.

     

    An  enhancement of this solution could be to use a laser telemeter from the  top to measure height of the the two liquids togheter.... when this  level changes we control the electrodes system at the interface between  liquid 1 and liquid 2 so that we avoid that the electrodes system be  continiously moving up down and down up for  real time measurments. It  just needs to be moved to monitor the liquids interface height change.

     

    Lotfi

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