The Weigh In Motion (WIM) system
BISON Weigh in Motion System: How does it work
BISON WIM technical features
The Weigh In Motion (WIM) system BISON is composed of 2 stainless steel bending plates equipped with fiber optic sensors connected to a datalogger.
The data acquisition unit (datalogger), processes, and stores all information collected in a database. All the transit information is made available to the user through a web interface easily accessible from every device.
- Approved by the Italian Ministry of Economic Development
- Calibration only every 2 years
- High durability and reduced maintenance
- Easy movement of the system to a new installation site
- Re-use of bending plates in case of maintenance work on the road surface
- Insensible to temperature variations
- Datalogger can be installed even at long distances (up to 10 km) without the measurement being affected
- No electric cable or electronic device under the bending plates
- Immunity to electromagnetic fields
- Works even in extreme conditions (snow or mud)
Weigh in Motion
Technical Features
COST 323 B+(7)
- Accuracy class: 7%
- Maximum weight per axle: 20 t
- Speed range: 5-110 km/h
- Transit directions: Both
OIML R134 CERTIFICATE
- Accuracy class: 10%
- Maximum weight per axle: 20 t
- Speed range: 5-90 km/h
- Transit directions: Both
BENDING PLATE
- Technology: Optical fibre sensor
- Dimensions WxHxD: 151/175x62x5 cm
- Power supply: Not required
- Digging: From 7 up to 24 cm
- Material: Stainless stee
DATALOGGER
- Connection to bending plates: Fiber Optic cable
- User Interface (web): PC, tablet e smartphone
- Power supply: 110-230 VAC
- Optional: Printer
WIM Data Collected
BISON, in addition to the weight, is able to supply the following data without additional devices:
Gross vehicle weight (GVW)
Transit speed
Vehicle counting and classification
Number of axles
Single wheel weight
Axle spacing
Axle width
Vehicle length
Twinned wheels
Alert transit out of one bending plate
Weigh in motion Software
The software is designed directly from iWIM, it has simple and intuitive and is able to provide, immediately and clear all the necessary information of specific interest to the user.
The system can be interfaced with other ITS systems such as ANPR cameras for license plate recognition.
