Technology Profile |
Direct enforcement WIM
ready for deployment
With KiTraffic Digital,
measurement
technology expert
Kistler is bringing to market its
most accurate weigh-in-motion
(WIM) system to date. The new
system promises an accuracy
of up to 2% GVW (gross vehicle
weight) – independent of almost
all external factors, such as
driving manoeuvres or road
conditions. In this way, Kistler
has created the conditions for
automatically imposing fines
for overloaded vehicles.
WIM technology is already
being used for various purposes
– for example, to protect bridges
and roads or to collect data.
Sensors in the road surface
record the weight of vehicles
without impairing the flow of
traffic. However, the technology
has not so far been capable of
fining overloaded vehicles
directly after weighing in
the same way as we are used
to with speed controls.
| Need to know In the vast majority of
Characteristics of the
KiTraffic Digital system
> Multiple quartz crystals
inside the Lineas Digital
sensor provide increased
accuracy, even when the
external conditions are
sub-optimal
> Enables the individual
calibration of each quartz
crystal, which significantly
improves the accuracy of
the sensor
> Features a graphical webbased
user interface and
can be easily integrated
into higher level systems
countries, ‘direct enforcement’ –
i.e. automated recording of
vehicle data with subsequent
notification of fines – requires
vehicles to be weighed using
certified, static scales. The
authorities also need to be
able to rely on the measurement
results if, for example, the road
quality is sub-optimal or a
vehicle drives diagonally across
the sensor. WIM technology
is therefore primarily used for
pre-selection. Officers are then
subsequently required to verify
the measurement with the aid
of a static weighbridge and can
only then fine the driver.
Multiple sensors
With KiTraffic Digital, the
Swiss company Kistler has now
succeeded in bringing a solution
onto the market that significantly
078 Traffic Technology International January/February 2020
www.TrafficTechnologyToday.com
21-24 APR 2020 AMSTERDAM
KISTLER Stand: 10.308
Top: Kistler has made
automatic fines for
overloaded vehicles
possible
Far left: The Lineas Digital
sensor incorporates
multiple quartz crystals
Left: Each crystal is
calibrated to prevent
signal interference
the sensor delivers reliable
results even when the vehicle
is about to overtake and is
driving diagonally over the
WIM sensors, while monitoring
can be carried out on any
number of lanes.
Tire updates
The sensors also provide
information on whether a
vehicle is equipped with single
or dual tires and can draw
conclusions about the condition
of the tires. KiTraffic Digital
automatically records this
information without the need
for additional hardware. On
the contrary, it even eliminates
the need for the previously
necessary induction loops
for vehicle detection.
The new system will be
presented to the public for the
first time in April next year at
Intertraffic Amsterdam.
improves measurement accuracy
and enables direct enforcement
in accordance with legal
requirements.
The entirely new sensor
incorporates multiple quartz
crystals that independently
deliver data via a digital
interface. The digital measuring
signal permits individual
calibration of each quartz
crystal and prevents signal
interference on the transmission
path. Working from the
measurement signals,
sophisticated algorithms
calculate the wheel, axle and
total weight of each vehicle.
Thanks to open standard
interfaces, the system can be
easily integrated into third-party
traffic monitoring systems.
The new digital system
enables other potential sources of
error to be ignored. For example,
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