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
Printing apparatus and method of operation of a printing apparatus
Controller with screen
Display screen with graphical user interface
Method of using N-thio compounds for oligonucleotide synthesis
Contact detection between a disk and magnetic head
DRAM refresh method and system
Providing policy-based operating system services in an operating system on a computing system
  Randomly Featured Patents
Semiconductor memory with trench capacitor
Semiconductor memory device
Method and apparatus for manufacturing high melting point glasses with volatile components
Leucanthemum plant named `LWMWH03-0`
Photomultiplier tube comprising a large first dynode and a stackable-dynode multiplier
Electrical insulating oils
Grounding terminal block assembly for multiple services
Locking apparatus of swing hinge module for mobile communication terminals
Chewing gum pellet coated with a hard coating containing erythritol
Self-servo-write using ramp-tracks