Apparatus is disclosed for monitoring use of a carriageway, the carriageway having two or more lanes (12, 14, 16) for use by vehicles travelling in a single direction A, the apparatus including: a pair of inductive loops (20abc, 22abc) on or in the surface of each lane (12, 14, 16), the loops in the pair being positioned substantially side-by-side across the lane (12, 14, 16) and the pairs of loops (18a, 18b, 18c) being positioned substantially side-by-side across the carriageway, each pair of loops (18abc) substantially extending across the full width of the lane (12, 14, 16), and each loop having a length in the direction of vehicle travel which is substantially shorter than the width of the loop across the lane; a loop controller associated with each loop, each loop controller energising its associated loop and carrying out measurements of the inductance of its associated loop; and processing means for receiving the measurements from the loop controllers, and for using the measurements for calculating the estimated position of vehicle(s) on the carriageway.
Vehicle detection apparatus with inductive loops
09.05.2018
Patent
Elektronische Ressource
Englisch
IPC: | G08G Anlagen zur Steuerung, Regelung oder Überwachung des Verkehrs , TRAFFIC CONTROL SYSTEMS |
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