Measure hardness, any ideas?

[SimonTHK]

Hello smart people

So I want to measure hardness of different kind of balls Ive got.
Does anyone have any Idea on how I can do this?

I want my "machine" to measure this by itself, using a microprocessor to measure som voltage or similar that indicate the hardness of the (the difference are not big, so it needs high accuracy). Do I need to be extremely innovative, or is this made before or easy for me in any way?

Thanks in advance
Best regards Simon

 

[Nigel Goodwin]

A little googling produces plenty of information - your 'problem' is finding, or making, some kind of sensor to provide a signal.

I presume you are aware it's pretty well a distructive' test?, you're measuring how much damage it takes.

5 Ways to Measure the Hardness of Materials

Knowing the hardness of materials is extremely useful as it assists in the selection of appropriate materials for specific applications. Prior knowledge of the

www.corrosionpedia.com

 

[Buk]

Does anyone have any Idea on how I can do this?

The only entirely non-destructive method of testing hardness -- assuming the balls are not brittle -- is a rebound test:

Have you seen this video

Ignore the "LiquidMetal", its just a brand name. The metal on the left is an amorphous (non-crystalline) metal, similar (if not the same) as MetGlas Amorphous Iron.

Its okay for comparative testing, but its not easy to calibrate.

Dunno how you would make a machine to do it. Maybe drop a ball in a glass tube onto a titanium plate and use lasers and diodes to time the speed of the rebound.

 

[Pommie]

What kind of balls? Ball bearings, tennis balls, bowling balls etc.

Mike.

 

[SimonTHK]

What kind of balls? Ball bearings, tennis balls, bowling balls etc. Mike.

Hello Mike

It is just a miniature golf ball. It is quite soft compared to metals.
I have no idea og how to do it

Maybe something about measuring the height of a bounch, maybe numbers of bounces I dunno.

 

[atferrari]

Sure it is NOT a solution for your query but could spark an idea: when testing fruits to see if still suitable for export they use a quite simple instrument with kind of a small piston striking the surface from a certain distance.

 

[Pommie]

Are these real golf balls? As most have full information available.

Mike.