Vehicle Loop Detector Circuit Diagram

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.

Vehicle loop detector circuit diagram.

Twisted loop extension cable is used to extend the distance from the preformed or saw cut loop to the vehicle detector which is usually located indoors or in a weatherproof enclosure. The detector module powers the loop and causes a field to form around the loop. Loop detectors are the brains of the system. Loops can be direct burial pave over saw cut cut in or a sensor probe or wand.

Good practice dictates multiple loops and detectors in this situation. The detector module monitors this resonant frequency to determine if a vehicle is in the loop area. 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. If the extension cable.

The loop is connected to the detector. Two loops can be wired to one detector. Exit loops are used to open gates to allow a vehicle s exit. If the inductive loop is placed correctly it will detect vehicle open gate and keep it open until the vehicle clears the gate.

Inductance loops are available as direct burial or cut in. The electronics unit applies alternating current electrical energy onto the wire loops at frequencies between 10 khz to 200 khz. An insulated electrically conducting loop is installed in the pavement. Vehicle loops and loop detectors are used to detect the presence of a vehicle to open a gate or as a safety device to prevent the gate from closing on a vehicle in its path.

Loop detector wiring diagram 38 loop detector operating instructions 38 1 38 6 remote control station pedestal 39 notes 40 operator field installation for assembled gate 41 42 operator field installation for unassembled gate 41 42 balance system adjustment and safety warnings 43 44. Find emx d tek loop detector here. 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. They are control module components which are installed on the gate operator control or circuit board and operate in tandem with the loop.

See installation diagram loop detectors are used to detect the presence of vehicles. Momentary delay into the detection circuit to verify that a vehicle is present in the loop for a minimum time period before activation occurs. Safety loops are used to prevent a gate from closing on a vehicle. Extend detect this feature is controlled by dip switches 7 and 8 on the back of the detector.

Turning on switch 7 allows for a 6 second extension of the detection after the vehicle leaves the loop. The loop automatically tunes to a resonant frequency.