Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
Devices including composite thermal capacitors
Changing sound alerts during a messaging session
Systems and methods for sensing external magnetic fields in implantable medical devices
Stevia formulation
Semiconductor device element formed on SOI substrate comprising a hollow region, and having capacitors in an electric field alleviation region
Encoding method and encoding device, decoding method and decoding device and transcoding method and transcoder for multi-object audio signals
Method for manufacturing non-volatile memory device, non-volatile memory element, and non-volatile memory device
  Randomly Featured Patents
Electrically operated jigsaw
Azeotropic compositions of 1,1,1,4,4,4-hexafluorobutane and 2-methyl butane and the use thereof in the production of foams
Document retrieving apparatus, document retrieving method, program, and storage medium
Storage system having a plurality of controllers
Heat-insulating body
Ozone resistant elastomeric articles
Ear plug
Memantine titration/compliance dosage methods
Automatic selector device for multi-gear change-speed gearbox
Sodium hydroxymethane sulfonate to improve the color stability of rosin resins