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
Integrated transmit/receive switch
Reading apparatus and reading method
Semiconductor device and method of forming interconnect structure with conductive pads having expanded interconnect surface area for enhanced interconnection properties
Puncture resistant fabric
Method of applying a spherical correction to map data for rendering direction-of-travel paths on a wireless communications device
User interfaces
Domestic soda-water preparing device
  Randomly Featured Patents
Metal e-fuse with intermetallic compound programming mechanism and methods of making same
Fabrication of complementary bipolar transistors and CMOS devices with poly gates
Method of treating excess sludge
Utility tool for power chain saw
Process for subbing photographic hydrophobic films
Anti theft locking system
Recombinantly producing levodione reductase
Production process of liquid crystal display panel, seal material for liquid crystal cell and liquid crystal display
Method for treating spark plugs
Linkage arrangement for steam turbine valves