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Intrusion Detection Sensor

  • US 20090079563A1
  • Filed: 06/22/2006
  • Published: 03/26/2009
  • Est. Priority Date: 06/24/2005
  • Status: Active Grant
First Claim
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1. An intrusion detection sensor comprising:

  • a microwave sensor that transmits microwaves toward a detection area, receives the microwaves reflected by an object present in the detectionarea, and outputs a reflected wave reception intensity signal according to the received intensity;

    a direction variable antenna device that can change the direction of the microwaves transmitted/received from/by the microwave sensor within a predetermined range of angle;

    a scanning measurement means that provides, to the direction variable antenna device, an instruction to scan the predetermined range of angle of the transmission/reception direction so as to determine a relationship between the transmission/reception direction and the output of the reflected wave reception intensity signal;

    a detection target object presence determination means that determines whether or not a detection target object is present based on the relationship between the transmission/reception direction and the output of the reflected wave reception intensity signal determined by the scanning measurement means; and

    an alarm signal output control means that performs control so that an alarm signal is outputted when the detection target object presence determination means determines that a detection target object is present.

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