Hi,I'm doing project on waste segregation using sensors.I need help on what sensors should I use to segregate metal,paper and plastic.I want to know the differentiation between the inductive and capacitor proximity sensor and which one will be best to use?
Is the sensors are just enough to segregate the waste or will need any cameras to identify the waste?
I'm also using ultrasonic sensor to know the level of waste inside the bin.
Can help me with code tooo..
This is not easy to do.
Where does the waste come from?
How will the waste pieces be presented to the sensors?
Will all the material be dry?
...R
Is this a college assignment?
Robin2:
This is not easy to do.Where does the waste come from?
How will the waste pieces be presented to the sensors?
Will all the material be dry?
...R
I'm planning to design a recycle bin with three different compartments inside it for the metal,plastic and paper.
So, i'm confuse that how to place the sensors and segregate the wastes.
Yes ,all the materials will be dry.
PerryBebbington:
Is this a college assignment?
Yes it is my final year project
narmatha_rajamogun:
I'm planning to design a recycle bin with three different compartments inside it for the metal,plastic and paper.
So, i'm confuse that how to place the sensors and segregate the wastes.
That only describes the situation after the materials have been segregated.
What's important at this stage is how will the materials be presented to the sensors - i.e. before they are segregated.
For example will a person hold a single piece of material in front of each of the sensors in turn and then be told which bin to put it in ?
...R
Robin2:
That only describes the situation after the materials have been segregated.What's important at this stage is how will the materials be presented to the sensors - i.e. before they are segregated.
For example will a person hold a single piece of material in front of each of the sensors in turn and then be told which bin to put it in ?
...R
Yes,will hold single piece of material.Then,it should rotate to its compartment according to the type and drop the waste inside it.So,there will be a servo motor to rotate.What sensors and where to place to identify the waste?The wastes are metal,plastic and paper
metals can be separated by eddy current devices and conveyor belts with magnets
it is very hard to find a sensor that will tell the difference between paper and plastic.
a light plastic bag will be lighter than a post card, so wind or weight are not easy to use
neither paper or plastic is conductive when dry, so unless you wet the stuff, conductivity is not going to help.
the answer you seek is in the sensors. if you can find a sensor that can identify paper or plastic, then the interface can be made to a controller.
this is a case of application driving the solution
if you separate out the metals, the easy part
then shred everything else, you may be able to drop the waste past a slow fan. the light paper and plastic bags would move to one side and the heavy plastic from soda bottles would fall straight down.
dave-in-nj:
then shred everything else, you may be able to drop the waste past a slow fan. the light paper and plastic bags would move to one side and the heavy plastic from soda bottles would fall straight down.
IMHO it is also essential to separate the light plastics from the paper because they do just as much, maybe more, damage to the environment as the heavier plastics.
I understand the "mechanical" logic for shredding the stuff but I reckon that also adds to the problem because the smaller pieces of plastic are more likely to escape into the environment and into the food chain.
...R
Robin2:
IMHO it is also essential to separate the light plastics from the paper because they do just as much, maybe more, damage to the environment as the heavier plastics.I understand the "mechanical" logic for shredding the stuff but I reckon that also adds to the problem because the smaller pieces of plastic are more likely to escape into the environment and into the food chain.
...R
recycling paper requires one liquifies it and then uses the pulp for the next stage.
it is not hard to turn paper into pulp in a high water bath, then remove/filter out anthing that does not turn to pulp.
the filtering of all waste goes in stages, separating heavy plastic from light is only one stage
separating paper from light plastic is a different stage.
since we don't know any of the requirements for the assignment, the OP will have to find what fits the needs.
and separating heavy plastics does not separate HPDE from all other plastics so every path of separation will have a subsequent separation procedure.
@narmatha_rajamogun - your duplicate post in Sensors has been deleted
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Thanks in advance for your cooperation.
You will always need to have a large bin for the "don't know" items.
Paul
Paul_KD7HB:
You will always need to have a large bin for the "don't know" items.Paul
yes, and you probably will have a bin for 'mixed' where it is not worth the effort to separate them.
I think the ultimate goal is to make those bins as small and un=filled as possible
dave-in-nj:
yes, and you probably will have a bin for 'mixed' where it is not worth the effort to separate them.
I think the ultimate goal is to make those bins as small and un=filled as possible
The truth is, there is no market for any of the material and it ALL goes into the land fill.
Without making any public announcements, the local county garbage collection sites have stopped all attempts to segregate materials, except for: colored glass, metal, rubber tires, oil, and electronic waste. EVERYTHING else goes into large dumpster bins, all together.
I guess when they get all the bins filled, they take them to the land fill and start over.
The economy, Chinese virus and lack of income for the county make recycling too costly.
Paul
Alright ,so what I get it from the discussion is segregating between paper and plastic is not an easy task.
One more questions ~
If i want to segregate between metal,plastic and glass,is this will be easier?What the sensors will help me?
I want sensors and hardware in low budget and my project i want to be not so complicated.
I'm just a beginner for arduino.
Project Explanation:
I will drop the waste one by one.Then ,it should sort to its type using sensor and at same time can measure the level of waste.If it at maximum level,should notify.
Paul_KD7HB:
The truth is, there is no market for any of the material and it ALL goes into the land fill.
In that case I would prefer the plastic to be in large pieces rather than have it shredded.
...R
narmatha_rajamogun:
What the sensors will help me?
What about tapping the material with a small hammer and listening to the sound?
...R
Robin2:
What about tapping the material with a small hammer and listening to the sound?...R
Yes,I'm not planning to use shredded waste.All will be large pieces.
Paul_KD7HB:
The truth is, there is no market for any of the materialThe economy, Chinese virus and lack of income for the county make recycling too costly.
Paul
The Chinese used to take the lot, then sort on their end.
then, decided there were getting too much trash and required that everything was pure, no plastics in with paper, and they were getting 1 to 10% mixed so wanted 100% pure, ZERO mix.
it is nearly impossible to get pure because there are no sensors to select one from the other, it is lots of different approaches to sort.
but the reality is laid out in your first statement.
metals are easy to separate, all metals will be effected by electrical fields, some by magnets. so you can separate copper with aluminum from iron, and all metals from paper, plastic and glass
Glass will be more dense, so the fan to blow plastics to one side and let the glass drop straight down
run the lot over some sort of grate or fence so the small pieces are separated before getting to the fans.
Then larger plastics that fall with the glass will be hand sorted.
As you can see, no one has offered any sort of sensor that can identify the different things, because they are either nonexistent, or so expensive that they are out of the reach of any hobby work.