Any good methode to measure matureness of an avocado

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Hi,

I was asked to design a device that it could measure matureness of fruit avocado. I tried to google but found nothing about how to measure it. Could you please suggest me any good methode how to measure? Is ultrasound a methode I can use? I think this kind of project is funny. Thanks in advance!

Best Regards,
Alex
 

I think you need to measure the resistance of the fruit. I use similar method with flowers
 

First i want to specify that this project is amazing Yes you can use ultrasound imaging for this job. You can place a mature avocados in front of the ultrasonic transmitter than take the reflected waves to define the specialities of mature avocados. Then you can compare the avocados with your results. I think by this way you can obtain something.
 

Funny maybe - but VERY commercial.
A lot of effort goes into keeping fruit/veg fresh during transport including
special porous plastics to seal their packaging with.

Being able to monitor how things are going could be a very lucrative
project for you on top of the more obvious sorting at the growers end.

Don't forget gas sensors. I don't know about Avocados but banannas for example give off a specific ripening gas.

jack
 


It is possible to develop such system, based on transmission of ultrasonic waves through fruit. We have collected some experience with this topic and would be able to develop such equipment.

If you are interested, please contact me.

W. Bicz
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How do you couple the ultrasonic wave into the avo?
Do you use petroleum jelly ?
How does the ripeness effect the ultrasonic wave? Does it change the propagation speed?
Is the test totally non destructive?
 

klystron said:
How do you couple the ultrasonic wave into the avo?
Do you use petroleum jelly ?
How does the ripeness effect the ultrasonic wave? Does it change the propagation speed?
Is the test totally non destructive?
Click to expand...
The best way to couple ultrasound is to use immersion in water.
Ripeness changes the speed of sound, but also the attenuation. It is not sufficient to check only one way, but a kind of picture (cross section) would be necessary.
The necessary device will be not very simple, but quite effective and quick.

W. Bicz
link removed
 
What about the hardness or the firmness of the avocado?

An unripe fruit is firm and hard, it softens as it gets ripe. An over ripe fruit is very soft.
 

How would you measure hardness in a non destructive way ?
 

klystron said:
How would you measure hardness in a non destructive way ?
Click to expand...

Using ultrasonic waves it is easy, because both sound speed and attenuation are changing strongly, depending on the hardness (ripeness) but to achieve proper results some additional measurements must be made. They can be also made with ultrasound. This means: to achieve the goal, you must build a device, that is not very simple - not with one transducer.

W. Bicz
 

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