Measure hardness, any ideas?

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

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.

SimonTHK said:

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

Click to expand...

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.

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

Mike.

Pommie said:

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

Click to expand...

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.

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.

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

Mike.