Doppler radar system for measuring range, speed, and relative direction of movement of an object
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United States of America Patent
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N/A
Issued Date -
Nov 18, 2004
app pub date -
May 12, 2003
filing date -
May 12, 2003
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A ranging Doppler radar system for identifying, and measuring range, velocity, direction of movement of a vehicle with minimal interference from surrounding environs and with low probability of intercept by the vehicle. The transmitted radar signal is modulated with pseudorandom code which acts as a frequency spreading agent and which allows a radar system to resolve range to targets into discrete 'range cells'. Range cells can be grouped to yield a 'range segment' which defines a region of roadway, such as a school zone. Traffic can be monitored in all range cells, or only in a predetermined range segment. Maps of traffic flow and vehicle parameters are generated and displayed using radar output parameters. Images representing vehicles violating posted speed limits are identified and highlighted on the traffic flow maps. Output from the radar system can be combined with supplemental data such as video and audio communication to yield an even more extensive presentation of traffic flow.
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