An insulated electrically conducting loop is installed in the pavement.
Vehicle detection loop detector wiring diagram.
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A buried coil of wire loop in the roadway vehicle detector electronic module.
In general loop vehicle detectors from all manufacturers work under the same principle and will all work reliably if the installation is done.
This video just want to show our traffic vehicle detector function and the loop inductive can be identification if you want to use it for traffic control app.
Vehicle detection if no response should be an increased sensitivity to stall so repeated several times until the car seized stability for normal work.
Be sure that other loop wire is floating not connected.
Loop wire insulation and sealant.
It is shipped with a underwriters laboratories approved class 2 plug in the wall 12 vdc power adapter.
However the power can be supplied by any external device and connected via the screw terminals provided inside the enclosure.
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The wire should maintain its integrity under the pavement stress.
Use a multi meter to measure the resistance from one loop wire to ground stick long nail in dirt if operator does not have ground.
The proper installation and material is critical.
Since asphalt is more flexible than concrete it is recommended that a heavier gauge wire be used for loop installations in asphalt.
The wire gauge is not critical to proper operation of the loop detector.
The marsh loop vehicle detector can be powered by either a 9 20vdc or 9 16vac.
Inductance loops are available as direct burial or cut in.
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.
In general direct burial loops are placed below the surface prior to application of asphalt or concrete while cut in loops are installed within a slot sawed into.
Basics of vehicle detection loops.
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 incorrect type of wire will also leak to ground.
The electronics unit applies alternating current electrical energy onto the wire loops at frequencies between 10 khz to 200 khz.
