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Pulse Induction target responses:
I have used Python , and its' ready-made chart libraries to visualise and curve fit. The code is available on 'git-hub' https://github.com/Rollpopptery/coil_lab
The curve-fit finds the Time constant 'Tau' of the fitted exponential decay, here are 3 targets (attached)
The 'Grab' button is pressed multiple times to take multiple signal snapshots.
Note the Iron Pliers target clearly shows the typical Iron deviation from an ideal curve; it is peakier at the beginning and 'bows in', more than a purely conductive (non iron target) does.
Picture1: Bottle Cap Time constant 12 uSec
Picture2: Pliers Time constant 40 uSec
Picture3: Silver Coin Time constant 61 uSec
I have used Python , and its' ready-made chart libraries to visualise and curve fit. The code is available on 'git-hub' https://github.com/Rollpopptery/coil_lab
The curve-fit finds the Time constant 'Tau' of the fitted exponential decay, here are 3 targets (attached)
The 'Grab' button is pressed multiple times to take multiple signal snapshots.
Note the Iron Pliers target clearly shows the typical Iron deviation from an ideal curve; it is peakier at the beginning and 'bows in', more than a purely conductive (non iron target) does.
Picture1: Bottle Cap Time constant 12 uSec
Picture2: Pliers Time constant 40 uSec
Picture3: Silver Coin Time constant 61 uSec