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
Signal judgment method, signal judgment apparatus, program, and signal judgment system
Aggregating completion messages in a sideband interface
Voltage detecting device for LED driver
Method and system for automatically hiding irrelevant parts of hierarchical structures in computer user interfaces
Information processing device and display control method
Color imaging device
Efficient forward ranking in a search engine
  Randomly Featured Patents
Orientation processing device for magnetic particles on disc-shaped magnetic recording medium
Superconductive magnet device and magnetic resonance imaging apparatus
Thin film formation process
System for asynchronous DMA command completion notification wherein the DMA command comprising a tag belongs to a plurality of tag groups
Piping assembly for use in roll section of continuous casting line
Dense wavelength division multiplexer/demultiplexer with parallel separation of wavelengths utilizing glass block interruption of the optic signal
Forward error correction for media transmission
Hunting bullet with reduced aerodynamic resistance
Thermometer-clock face
Atmospheric pressure afterglow ionization system and method of use, for mass spectrometer sample analysis systems