Weigh-in-Motion (WIM)

The TDS 821/WIM-S is a WIM system which detects and classifies traffic on up to 8 lanes and measures the weights on up to 6 lanes using 2 rows of sensors in each case (24 LINEAS quartz sensors).

The data material shows daily trends and variations which are of great importance for conservation management. This applies particularly in the case of sections which are organised in the private sector, so-called PPP projects (Public Private Partnership), in which these values or values derived from them often form part of the contract during both construction and maintenance. In this case, traffic safety is not the most important aspect. More often, the focus is on financial considerations which result from the fact that an overloaded HGV can stress the road up to 20,000 times more than a permissibly loaded vehicle.

In 2003, Traffic Data Systems supplied the first WIM-S system to be used as part of a PPP project (Public Private Partnership) in the road construction industry.

• 1 to 6-lane WIM with 2 or 3 rows of sensors per lane
• Up to 8 lanes with double inductive loops
• Detector/classifi er with BASt certifi cation since June 2009, accuracy class A1 with300 m cable length
• Optimised for LINEAS sensors from Kistler Instrumente AG
• Integral quad band GPRS/EDGE or UMTS modem
• Card holder for 3V SIM cards (front accessible)
• Integral FG2-EAK (optional control module, FG1, FG3 and FG6)
• RS 485 interface (local bus)
• RS 232 interface (modem)
• Mini SD card (front accessible)
• Battery-backed real-time clock with calendar, time zones and automatic summer/winter time (can be synchronised in operation via IEEE 1588 and NTP)
• 28-channel A/D converter 100 kS/s
• USB interface
• Ethernet interface
• Temperature range -25°C/+75°C
• 19-inch rack or desktop case
• Power supply 230V/50-60 Hz or 12-28VDC

(Technical data are subject to change without notice)