Vehicle Loop Detector Circuit Schematic

If the inductive loop is placed correctly it will detect vehicle open gate and keep it open until the vehicle clears the gate.

Vehicle loop detector circuit schematic. The loop resonates at a constant frequency that the detector monitors. We carry models from emx platinum access northstar diabo mmtc liftmaster doorking reno a7e. Drive a large vehicle over adjacent lanes loop detectors and observe if a false call spillover is detected. Loop detectors are available as direct plug in for specific gate operator control boards or use a universal 11 pin octal connector.

This circuit can also be used in conjunction with my delay. The microcomputer monitors the oscillator frequency and controls the switching of the capacitors to periodically return the frequency to a predetermined value. For example a 4 x 8 loop will give a detection height between 2 1 2 and 2 3 4 feet. A base frequency is established when there is no vehicle over the loop.

Loop detector schematic modified to drive a relay. Executive summary of the induction loop vehicle detector. View more loop detector loop overview. Extension cable which in turn connects to the vehicle detector.

For high bed vehicle detection the typical loop size is 6 x 8. Set the sensitivity to the lowest setting that will detect a bicycle. Into the designated loop. The octal connector is available as a harness or a mountable socket.

The detector powers the loop causing a magnetic field in the loop area. A circuit used to detect a vehicle on blacktop pavement concrete and trigger an alarm or relay. Detection distance is much better with a large 6 foot coil. This tiny test coil was for testing only on my work bench and although it works detection distance is not very good.

Observe the detection call light on the detector module for all sensitivity settings. An induction loop vehicle detector comprises an oscillator circuit having a plurality of capacitors switchable in circuit with a road loop under the control of a microcomputer to determine the oscillator frequency.