Introduction to WIM
Like other Intelligent Transportation Systems (ITS), Weigh-in-Motion (WIM) technology is used for various applications in connection with the weights and axle loads of road vehicles and train cars; which are installed on the road or railroad tracks, to measure, store and display data from a specific vehicle, or the flow of the traffic in general. For WIM system to function properly, certain conditions must be met that impact the quality and reliability of the data that is being collected, including, but not limited to the road surface condition, type and durability of the sensors and the WIM hardware itself. Thus, specific knowledge and expertise is required for a successful implementation of a WIM system.
FARD Group International designs, manufactures, and implements weigh in motion (WIM) systems utilizing a highly specialized and complex methodology in its operation. We apply extreme data analysis knowledge.
The complexities of the proper installation, calibration, operation, and maintenance of WIM systems beg the question:
“What is the justification for installing a WIM system?”
The simple answer is:
“Only through an accurately installed WIM system, detailed data on vehicle weight, speed, classification, and violation type can be obtained!”
Importance Of Vehicle Weight Information
A WIM system measures a vehicle’s dynamic axle loads, and attempts to best estimate the transmitted static weight of the same vehicle. The data offered by WIM Systems include license plate recognition, gross vehicle weight, single axle weight & group of axles weights, date & time, location, speed and vehicle classification.
This knowledge will obviously replace the estimated weighing data, which in turn will drastically reduce the margins of uncertainty, optimizing the pairing of heavy goods vehicles data and the road infrastructure endurance; which translates to efficient transportation, and a more economical infrastructure management.
The ideal WIM systems perform without attendance, under all types of traffic and environmental harshness, without any control over the vehicles’ movement or the drivers’ behavior.
Low Speed Weigh-in-Motion (LS-WIM)
A dedicated axle weigher platform, installed on a level and smooth spot, away from the main traffic lanes.
LS-WIM eliminates the dynamic effects of the vehicles, by controlling the velocity and unusual movements of the passing vehicles at low speeds, ensuring a close as possible wheel load measurement.
Key Features:
- Axle To Axle Distance
- GVW, Single Axle, Group Of Axles, Axle Of The Group, Measurement At ±0.5% Error
- Vehicle Classification
- Weighing Station Identification
- Date & Time
- License Plate Number Capture
- Speed
- Overweight Information Per Axle
- Vehicle Length & Wheel Base
- Vehicle Position By Lane & Direction
- Overload Violation
- Number Of Tires
High Speed Weigh-in-Motion (HS-WIM)
A HS-WIM is installed on the open traffic lanes, where vehicles travel under free flow conditions, at the appropriate speed limits. The vehicle dynamics which is dependent on the road conditions, the drivers’ driving behavior, and the reaction of the vehicle suspension are then measured.
The acceptable inaccuracy of a properly installed HS-WIM should be between ±5 to ± 10 % of GVW measurements.
Key Features:
- Uses Deep Learning Techniques To Estimate Axle Weight
- Very High Frequency Sensors With Class C6 Accuracy
- Short Installation Time
- Accuracy & Precision Is Not Affected By Seasonal Unpredictability
- Accuracy & Precision Is Not Affected By Road Surface Conditions
- No Accuracy & Precision Fluctuations Due To Vehicle Tires’ Pressure
- Minimum 10-Year Service Life
- Minimum & Easy Maintenance
- Accurate Speed Detection
- Axle To Axle Distance
- GVW, Single Axle, Group Of Axles, Axle Of The Group, Measurement At ±0.5% Error
- Vehicle Classification
- Weighing Station Identification
- Date & Time
- License Plate Number Capture
- Speed
- Overweight Information Per Axle
- Vehicle Length & Wheel Base
- Vehicle Position By Lane & Direction
- Overload Violation
- Number Of Tires