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Recent content by ahfa

  1. ahfa

    Connecting pulse output to Piezo alarm

    Dear all, Thanks for replying. I dont want to use paddle switch. The flow switch/meter is this one:http://www.ebay.com.au/itm/G3-4-034-Hall-effect-water-Flow-Sensor-Counter-DC3-24V-1-60L-min-Switch-Flow-Meter-/390600219998?_trksid=p2054897.l4275 And alarm is this...
  2. ahfa

    Connecting pulse output to Piezo alarm

    Dear all, I am mechanical engineer with no background to circuitry and electronics. I am trying to connect a flow switch ( using hall effect ,12 dc input) and I want it to trigger a piezo alarm (12V dc) when water flow stops. There are three wires from the flow switch, two for power and one...
  3. ahfa

    Sound Intensity Measurement

    Hi Walt, I have measured intensity very close( approx 200mm) from the surface using grid system (Using Using LD 2900 LD 2250 Probe). I need to predict dBA value expected from this surface at 1 m from the surface. Ahfa
  4. ahfa

    Sound Intensity Measurement

    Hi all, If anybody can guide me about how to Calculate(predict) SPL at 1 m from the surface from Sound Intensity measurements. Basically I am trying to predict SPL(dBA) around motor at 1 m at left, right and rear side. Any spread sheet or guide will be much appreciated. Thanks ahfa
  5. ahfa

    ANSYS Structural: Defining different materials in the same FEM model

    As long as you make model them as different parts , you can assign differentmaterial properties. You also need to pull all the materials in material library so that they can be assigned later.
  6. ahfa

    Meshing Help

    Hi all, I am new to Ansys. I am trying to a modal analysis on a piping system. Got a step file. After simplifying the geometry and applying the contraints (few fixed supports and applying couple of couplings). When I am solving the model (Solid) after meshing (auto) The solver goes on an and...
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