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New ViaFrictionGeneral presentation
H. Farstad, haavard@viatech.no01.10.2015
● Features of the new ViaFriction unit– Twice as much braking power as previous model– Vertical load > 100 Kg (Previously 50Kg)– Less variation in vertical load than previous model– Can measure high friction surface in 20 Km/h– Measurement unit increased by 20Kg
● Still free floating vertical load, rugged design andeasy & accurate distance calibration due to ONE wheel.
New ViaFriction
Easy to useNew ViaFriction
● In Norway, the driver operates the system● Easy to use Windows user interface● User interface contains the information you need while
measuring● Extensive check of system while measuring● Extensive and easy to use self-test
Easy to maintainNew ViaFriction
● Easy to maintain the equipment, few parts● Self-test pinpoints the faulty part● Easy to fix mechanical and electrical problems● Remote control and service from ViaTech via PC
Fixed slip measurementNew ViaFriction
● Can adjust slip percentage from 1% to 75% in the software within 30 sec.
● Normal slip percentage 15-20%● Measures 30Km on 1000 litre tank● Excellent repeatability● Keeps calibration for years
Variable slip measurementNew ViaFriction
● Gives the whole curve● Gives much more
information than fixed slip
● F30, F60, Sp
Nantes April 2015
Testing ViaFriction
● 10 longitudinal friction devices participated from all over Europe(2 commercial available for road survey: ViaFriction and Griptester)
● 11 different surfaces on test track– Each track measured in 3 speeds, 40 60 and 80 km/h– Each track measured 5 times– Friction level from 0.1 to 1.0
● 7 different surfaces on normal road outside test track– Each surface measured 3 times– Road measurement speed 60 km/h
Testing ViaFriction
Nantes April 2015
● Project objectives– Create a standard for measurements
● Data processing– Average and standard deviation for each surface– Data sent Rosanne project by end of May– Rosanne Report much later
Testing ViaFriction
Nantes April 2015
5 measurements, unfiltered data
Nantes April 2015
Testing ViaFriction
Klikk ikonet for å legge til et bilde
ViaFriction: Repeatability
5 measurements give same result !
Data to Rosanne
Nantes April 2015
Testing ViaFriction
ViaFriction Repeatbility
ViaFriction-sum up
• On the market since 2006, more than 70 sold• Easy operation by use of a touch screen laptop• Operated in normal traffic speed with controlled water flow• 1000 liter water tank gives approx. 30 KM of survey• Standard trailer coupling with AL-KO stabiliser • Result may be reported as text files. May be imported to Excel• Temperature-, humidity, MPD and GPS sensors as option• ViaPhoto system and web as option• Support different testing modes:
• Fixed slip mode (with adjustable % in the software)• Detection mode for reducing wear of tire & equipment• Variable slip mode
• Easy to calibrate, just adjustment in the software• Robust device with low maintenance costs• Remote diagnostics for online support• Trailer solution(EU approved) with superb suspention or on Truck/Van• Results provided instantly (realtime with WEB)
Some of the friction devices measure as much as 20 000 km per year on uneven roads
Appendix
ViaFriction ( CEN/TS15901-14)
ICAO approved
70 ViaFriction devices are sold since 2006-All still in use
ViaFriction + ViaPhotoW + GPS+WEB
Friction Limit AirTemp.
Hummidity
RoadTemp.
Dewpoint
Fric
tion
le
vel
Hu
mm
idit
y
Tem
p.
ViaFriction + ViaPhotoW + GPS+WEB
ViaPhotoLite-MK4
ViaFriction-design water system
Flow is controlled according to speedProtection system prevent dry run
The water tank of 1000-1200 liter can be filled automatically from water stored in the towing vehicle
1000 liter gives approx. 30 km of survey
SPIRAX:●
TREDAL has constructed its own suspension system. It was developed over several years and called SPIRAX
● The system consists of:● 1 Coil springs on swing arm● 2 Hydraulic double acting shock absorber● 3 Rubber Stopper to prevent breakage /
damage by overload or reckless driving.
● SPIRAX is based on the same principle as most cars have today, i.e. that a TREDAL trailer has virtually the same handling characteristics as your car. It provides comfortable and secure transport also on bad roads.
● ViaTech has further improved stability
ViaFriction-design trailer
EU-approved
ROaR (Norwegian Road Authorithy)
Product development of ViaFriction
Oscar (Norwegian Road Authorithy)
Oscar
ViaTech do the maintenance of OSCAR for the Norwegian publicroad administration (Vegvesen.no). Oscar is the Norwegian master for friction Also support during harmonisation
ROaR
Since 2005 ViaTech do the maintenance of ROAR for theNorwegian public road administration. 5 devices. Also support during harmonisation
Harmonisation in Norway
Picture taken 2013
Harmonisation in Norway-2015
Calibration certificate received 16/6-2015
ViaFriction - Optional water tank in the vehicle
ViaFriction - Optional Truck
ViaFriction - Optional Truck
ViaFriction-winter
Rough conditions: Temp, salt, sand and bumpy Requires a robust design
ViaFriction Airport
ViaFriction Extended-split friction
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