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Microwave sensor and mutual interference preventing system between microwave sensors

  • US 7,256,376 B2
  • Filed: 03/30/2005
  • Issued: 08/14/2007
  • Est. Priority Date: 03/30/2004
  • Status: Expired due to Fees
First Claim
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1. A microwave sensor for transmitting microwaves toward a detection area, performing an object detecting operation based on reflected waves from an object being present in the detection area, and outputting an object detection signal based on a result of the object detecting operation, the microwave sensor comprising:

  • a detecting operation controller for controlling the object detecting operation to be performed intermittently at a predetermined detection cycle,a time setting changer for changing a time setting of the detection cycle, andan electrical filter for preventing an electrical signal outside of a frequency region of an electrical signal obtained when detecting a human figure from being output in the object detection signal.

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