Measuring system with a single inductive loop and two polymeric pressure sensors

The most popular system for preselection weighing of vehicles in traffic today. Required module: p. WIM – module that works with a single inductive loop and two polymer pressure sensors Required sensors: one induction loop Two polymer contact sensors

Module: p. WIM

Measured parameters:

• vehicle arrival time (with 0.01s resolution),
• vehicle counts,
• interval between vehicles (0. 01s resolution),
• magnetic profile and vehicle classification based on it
  (4 classes are distinguished: cars, vans, trucks, buses)
• trailer detection,
• speed measurement (measurement error < 1 km/h),
• length measurement (measurement error 2%),
• number of axles,
• distance between axles (measurement error +-1 cm),
• classification by length (4 vehicle classes are distinguished),
• classification by FHWA F or ALT,
• axle tensions (measurement error 15 – 20%),
• total vehicle mass (measurement error 10 – 15%).

Determined characteristics (variation as a function of time):

• traffic density,
• flow (mass and vehicles),
• lane occupancy,
• average speed,
• number of vehicles by class (according to selected classification scheme).

.