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Physical object detection system

  • US 20100220551A1
  • Filed: 02/12/2010
  • Published: 09/02/2010
  • Est. Priority Date: 02/27/2009
  • Status: Active Grant
First Claim
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1. A physical object detection system comprising:

  • at least one transmitting element for transmitting a transmission wave;

    at least two receiving elements for receiving a reflection wave, which corresponds to the transmission wave reflected by a physical object; and

    an electronic unit for detecting presence of the physical object based on a phase difference between the reflection waves received by the receiving elements,wherein the electronic unit includes;

    a detection section configured to detect a set of waves, each of which is a part of the reflection wave received by each of the receiving elements and has an amplitude greater than a predetermined level, a time difference between time points at which the amplitudes of the set of waves exceed the predetermined level is less than a predetermined time interval; and

    a determination section configured to determine presence of the physical object when the set of waves are detected between the receiving elements.

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