Measuring quantity in a container
Measuring quantity in a container
(OP)
Hi,
We want to measure the quantity in the steel container placed on ABS plastic body. We are planning to go with flexible pressure sensor placed as shown in figure.
But i doubt if it would measure the correct quantity?
Can you suggest on how to place the pressure sensor so that the sensor measurements are accurate( we cannot place it above the plastic body due to application constrains).

Thankyou
We want to measure the quantity in the steel container placed on ABS plastic body. We are planning to go with flexible pressure sensor placed as shown in figure.
But i doubt if it would measure the correct quantity?
Can you suggest on how to place the pressure sensor so that the sensor measurements are accurate( we cannot place it above the plastic body due to application constrains).

Thankyou
RE: Measuring quantity in a container
RE: Measuring quantity in a container
We are going for indirect measurement because we don't want to expose electronics on the product.
RE: Measuring quantity in a container
RE: Measuring quantity in a container
RE: Measuring quantity in a container
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RE: Measuring quantity in a container
RE: Measuring quantity in a container
RE: Measuring quantity in a container
TTFN (ta ta for now)
I can do absolutely anything. I'm an expert! https://www.youtube.com/watch?v=BKorP55Aqvg
FAQ731-376: Eng-Tips.com Forum Policies forum1529: Translation Assistance for Engineers Entire Forum list http://www.eng-tips.com/forumlist.cfm
RE: Measuring quantity in a container
The accuracy is +/- 40gms.
The range of measurement is 60gms to 1200gms
THIS IS NOT FOR "SCHOOL"
RE: Measuring quantity in a container
TTFN (ta ta for now)
I can do absolutely anything. I'm an expert! https://www.youtube.com/watch?v=BKorP55Aqvg
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RE: Measuring quantity in a container
we planned going with the load cells but they are too bulky for our application
ABS virgin grade is 2.5mm thick.
Density changes are taken care by defining the range 60gms to 1200gms.
RE: Measuring quantity in a container
the application in the video uses load cells,and load cells are too bulky for our application so is the reason we chose flexible pressure sensors
RE: Measuring quantity in a container
RE: Measuring quantity in a container
TTFN (ta ta for now)
I can do absolutely anything. I'm an expert! https://www.youtube.com/watch?v=BKorP55Aqvg
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RE: Measuring quantity in a container
Burning is not suitable for our application.
Can you suggest any cost effective device or method which can measure calories for the application
RE: Measuring quantity in a container
TTFN (ta ta for now)
I can do absolutely anything. I'm an expert! https://www.youtube.com/watch?v=BKorP55Aqvg
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RE: Measuring quantity in a container
burning is not suitable for our application.
RE: Measuring quantity in a container
Without understanding your exact process and what you want to accomplish, the help you get will be minimal. For example, why do you want to check weight in the container? Why you want to weigh the container with in enclosure and why can't it be done outside? What is the relevance of temperature measurement and calorific values (or calories) etc. May be there is other way of controlling your process or may be not.
RE: Measuring quantity in a container
we are trying to implement a lunchbox which would measure the weight of the content in food container to calculate the calories in the food.
to calculate calories in the food, we need the calories of the food present in the box and also the amount of food in the box. So, we can give the total amount of calories in the food contained in the box.
RE: Measuring quantity in a container
I'm having difficulty believing that this is for work, when you have no detailed requirements and no detailed concept and are asking strangers on the internet for help.
TTFN (ta ta for now)
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RE: Measuring quantity in a container
As IRStuff already mentioned, the only way to check food strength is using a calorie meter and this is no more being practised as database usage is more handy now a days. Personalized and portable calorie meters are not a possibility, presently.
The option for pressure sensor is incorrect as solids don't exert uniform pressure as liquids do. If the solids are granular then cohesion forces between solid particles tend to reduce pressure at the bottom of container. Sometimes, at certain conditions, increased height of solids won't even impact the pressure at the bottom.
RE: Measuring quantity in a container
TTFN (ta ta for now)
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RE: Measuring quantity in a container
Why not a spring and a cheap capacitive, or IR reflective, or inductive displacement sensor? Better yet, why not graduations on the side of the cylinder to indicate filled volume (too low-tech?)
Measurement of calories is impossible without either burning in a bomb calorimeter (as suggested by IRstuff, but note that this method has issues with non-digestible materials) or by prior knowledge of the foodstuff calorie content per unit weight.
RE: Measuring quantity in a container
TTFN (ta ta for now)
I can do absolutely anything. I'm an expert! https://www.youtube.com/watch?v=BKorP55Aqvg
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RE: Measuring quantity in a container
Thank you for the suggestions
Burning food is not suitable for our application. So, there is no point in measuring the weight of the contents in the container when there is not scope of measuring calories without burning .
Can you suggest some methods to measure volume.
RE: Measuring quantity in a container
TTFN (ta ta for now)
I can do absolutely anything. I'm an expert! https://www.youtube.com/watch?v=BKorP55Aqvg
FAQ731-376: Eng-Tips.com Forum Policies forum1529: Translation Assistance for Engineers Entire Forum list http://www.eng-tips.com/forumlist.cfm
RE: Measuring quantity in a container
RE: Measuring quantity in a container
Walt