Resources Contact Us Home
Signal processing for object detection system

Image Number 16 for United States Patent #6243036.

Methods and apparatus for detecting objects are disclosed. In one embodiment of the invention, a person entering a secured or "Safe Zone.TM." is illuminated with low-power polarized radio waves. Differently polarized waves which are reflected back from the person are collected and measured. In a preferred embodiment of the invention, concealed weapons are detected by calculating the difference of a pair of differences between levels of different polarized reflected energy in the time domain, and by using signal processing methods and apparatus to improve the reliability of the detection process. Alternative embodiments of the invention may be used to detect a wide variety of objects other than concealed firearms. The invention may be used for inventory control or to thwart shoplifting.

  Recently Added Patents
Representations of compressed video
Defected ground plane inductor
Adsorptive molded parts and the use thereof
Method and apparatus for closed-loop control of anti-tachyarrhythmia pacing using hemodynamic sensor
Methods and system for displaying segmented images
Monitoring and correcting upstream packet loss
  Randomly Featured Patents
Rare earth magnet powder and method of producing the same
Water sports garments fabricated using stitchless seams reinforced by vulcanization and cross-linking
Safety circuit for an electronic throttle control of internal combustion engines
System and method for providing flexible data rate transmission in a telecommunication system
Contact array
Antisense modulation of SRC-1 expression
Process for producing aromatic amine
Functionalized imidazolinone haptens and protein conjugates thereof useful in assays for the detection of imidazolinone herbicides
Apparatus for detecting positioning error of a component with respect to a suction nozzle
Image forming system