Herbert A Hutchinson

US Patent:

6750787, Jun 15, 2004

Filed:

Mar 13, 2001

Appl. No.:

09/805691

Inventors:

Herbert A. Hutchinson - Westlake Village CA 91361

International Classification:

G08G 104

US Classification:

340942, 340933, 340935, 340936, 701119

Abstract:

The present invention is a vehicle traffic measurement system designed to accurately count and record the number of vehicles passing through a selected location, to more accurately determine and record the velocity at which the individual vehicles travel through that location, and to accurately determine and record in which relative direction the vehicles are traveling as they pass that location. The basic physical principle is of a moving object interrupting two parallel light beams a known reference distance apart, and information extracted from the interruptions sensed and electronically processed into count, direction, and velocity being recorded for subsequent data analysis.