Using an ultrasonic thickness gauge with a microcontroller?

Discussion in 'Test & Measurement Forum' started by mbferguson, Oct 4, 2018.

  1. ebp

    Well-Known Member

    Feb 8, 2018
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    Alas, the only Krautkramer thing I still have is a scan of a power supply schematic.

    If found this on the web for a GE USIP 40, dated 2007. This was several years after my last involvement with KB equipment. I'm guessing GE acquired the NDT assets of KB.

    Pulser Spike Pulse 100 V, 400 V / Charging Capacitor, 1 nF, 220 pF / Rise Time, 10 ns

    It just occurred to me that I may have at least some notes on the nature of the pulse. I had designed an in-line preamp for the return signal which required propagating the "ping" around the amp through a diode. The 8 ampere pulse was kind of cruel to a 1N4148-class signal diode, so I was concerned with total energy loss in the diode and may have made notes or calculations that might be at least a little useful. I'll have to root around a bit.
     
  2. kubeek

    Expert

    Sep 20, 2005
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    What was used to switch the pulse?
     
  3. ebp

    Well-Known Member

    Feb 8, 2018
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    I've been racking my aged brain and I cannot remember. I didn't find any notes on the pulse, but I'm reasonably sure nothing shaped it - it was just discharge of the selected capacitor, so contrary to what I said previously, there was no "dwell" time at the peak voltage.
     
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