Vehicle Detection Loop Circuit

In other words the relay circuit output will be closed opened the entire time that a vehicle is present over the loop and does not switch again until the vehicle drives away.

Vehicle detection loop circuit. Basics of vehicle detection loops. 3 an oscillator circuit comprises a road loop 1 and a plurality of capacitors 2 arranged to be switched in circuit with the road loop 1 under the. Vehicle detection loops or inductive loop traffic detectors can detect vehicles. There is a misconception that inductive loop vehicle detection is based on metal mass.

Vehicle detection loops called inductive loop traffic detectors can detect vehicles passing or arriving at a certain point for instance approaching a traffic light or in motorway traffic. Good practice dictates multiple loops and detectors in this situation. An insulated electrically conducting loop is installed in the pavement. The electronics unit applies alternating current electrical energy onto the wire loops at frequencies between 10 khz to 200 khz.

Loops are used to stop or reverse a moving gate to allow free exit from or entrance to a site or as an arming loop to allow entrance.