A VEHICLE DETECTING SYSTEM

摘要

The vehicle detecting system senses the existance of a vehicle on the roadway, and includes a pair of transmitting and receiving coils (2) and (4) arranged on both sides of a detection area set over the roadway of vehicle (c); a driving circuit (3) providing the high frequency excitation current to the transmitting coil (2); and a vehicle detecting means (5) outputting a vehicle detecting signal (S) in response to a variation of the characteristic such as level or phase of the electric signal induced in the receiving coil (4).