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Capacitive proximity sensor

  • US 20020154039A1
  • Filed: 05/30/2002
  • Published: 10/24/2002
  • Est. Priority Date: 08/21/2000
  • Status: Active Grant
First Claim
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1. A capacitive proximity sensor characterized by:

  • an elongated electrically non-conductive housing;

    a first electrode positioned in said housing and constructed for receiving a voltage signal;

    a second electrode positioned in said housing and being constructed to generate an input signal to a detecting device and spaced from said first electrode;

    a ground electrode positioned in said housing and having at least a portion thereof operably disposed in relation to said first and second electrodes to normally decrease the capacitive coupling directly between the first and second electrode such that a substantial amount of electric field lines between the first and second electrodes are laterally spaced from an axis between the first and second electrodes.

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