The "Virtual Inductive Loop"
Porta Saragozza, Bologna - Italy
This is a vehicle counter based on the inductive wire loops principle
. This transductor is emulated by a machine-vision algorithm which also
counts the vehicles. The bottom-left side number is the progressive vehicle
counter. Different colours in the displayed f(t) means different
There are two different ways to take count of vehicles
stops and standing under a VIL: "derivative" and "absolute". As shown the
count is double in the derivative case:
(both) Porta Saragozza, Bologna - Italy
The central lane vehicle is counted twice in the left sequence and single
in the right sequence.
Last update December, 11th 1998
me an e-mail