Vehicle Detection Loops

Free Exit - Loop Detector to Reverse

    Motivation detectors are micro processor based, digital induction loop presence detectors are based upon the principle of the change of inductance in a coil whose Electro-magnetic field is interrupted by a metallic object. The coil is represented by special cable loops embedded in the roadway whose inductance is reduced when crossed by a vehicle. All of the most modern specification, proven reliability, with a large margin for movement and roadway settlement, plus good sensitivity to detect a wide parameter of vehicle sizes. All types are self tuning. The mode detection may be by vehicle presence, a pulse impulse (crossing or leaving the dedicated area) or with delay before impulse. Motivation induction loop detectors are an obvious answer where vehicular only access is required automatically and is nearly always incorporated in car park projects utilizing our range of traffic control barriers.

The explanation of how it works is as follows:

Entry

    The vehicle approaches the entrance and driver places the coded card into a card reader or punches a digital keypad. This creates an impulse which actuates the operator and opens the gate.

    As the vehicle goes through the opening, it passes over the 'outer loop', creating an impulse to hold the gate open. When the loops have been cleared, the timer, after a pre-set period, sends an impulse to the gate operator to 'close' the gate.

    If the gate is closing as a vehicle reaches the loop area, the gate reverses to the open position and the timer automatically resets. This is a safety feature to prevent accidents and damage from those who attempt to 'race' through a closing gate.

Exit

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