Vehicle Loop Detector Circuit Schematic

The microcomputer monitors the oscillator frequency and controls the switching of the capacitors to periodically return the frequency to a predetermined value. For high bed vehicle detection the typical loop size is 6 x 8. A circuit used to detect a vehicle on blacktop pavement concrete and trigger an alarm or relay.

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Vehicle Loop Detector

Inductive Loop Vehicle Detector V2 1 Elektronika Ba

Induction Loop Vehicle Detector

Vehicle Loop Detector 2

Dual Channel Inductive Loop Vehicle Detector Elektronika Ba

Chapter 2 Traffic Detector Handbook Third Edition Volume I Fhwa Hrt 06 108

The detector powers the loop causing a magnetic field in the loop area.

Vehicle loop detector circuit schematic.

A base frequency is established when there is no vehicle over the loop. If the inductive loop is placed correctly it will detect vehicle open gate and keep it open until the vehicle clears the gate. 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. This tiny test coil was for testing only on my work bench and although it works detection distance is not very good.

Extension cable which in turn connects to the vehicle detector. Observe the detection call light on the detector module for all sensitivity settings. Drive a large vehicle over adjacent lanes loop detectors and observe if a false call spillover is detected. Set the sensitivity to the lowest setting that will detect a bicycle.

Good practice dictates multiple loops and detectors in this situation. The number of turns in the loop is determined by the size of the loop. Loop detectors are available as direct plug in for specific gate operator control boards or use a universal 11 pin octal connector. Into the designated loop.

The time will be calculated by arduino when the vehicle interrupts the start laser the timer begins and when the vehicle interrupts the end laser the timer stops and applying the values to the equation arduino will find the speed of the vehicle. For example a 4 x 8 loop will give a detection height between 2 1 2 and 2 3 4 feet. We carry models from emx platinum access northstar diabo mmtc liftmaster doorking reno a7e. View more loop detector loop overview.

Executive summary of the induction loop vehicle detector. This circuit can also be used in conjunction with my delay. The octal connector is available as a harness or a mountable socket. Loop detector schematic modified to drive a relay.

The loop resonates at a constant frequency that the detector monitors. Detection distance is much better with a large 6 foot coil.