Vehicle Detection Loop Circuit

Loop detectors are used in conjunction with vehicle detection loops to detect vehicular traffic traveling or stopping overhead in a roadway these are commonly used to trigger traffic lights and you have undoubtedly traveled over thousands of them without even realizing it.

Vehicle detection loop circuit. 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. The electronics unit applies alternating current electrical energy onto the wire loops at frequencies between 10 khz to 200 khz. Good practice dictates multiple loops and detectors in this situation. There is a misconception that inductive loop vehicle detection is based on metal mass.

If the inductive loop is placed correctly it will detect vehicle open gate and keep it open until the vehicle clears the gate. Basics of vehicle detection loops. An insulated electrically conducting loop is installed in the pavement. Is a block diagram of a vehicle detector circuit according to the invention for the induction loop vehicle detector description of the induction loop vehicle detector referring to fig.

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.