Resistive sensor RES2

Removable Axle Detection Resistive Sensor : RES2

The “Sensor / Support / Detector” set is designed for the detection of vehicle axles for a toll classification.

This set is used to detect vehicles travelling between 0 and 90 km/h (0 to 56 mph), with 99.9% detection accuracy.

Its shape also means that the sensor can slide into its SUP2 support directly in a toll lane. Replacing the sensor is easy and extremely fast during maintenance, so the toll lane can be reopened very quickly.

Axles are detected following pressure exerted by one or more wheels of the vehicle. This pressure therefore causes variation in the sensor’s electrical resistance. The signal is used by the Capella RD detector, which then transmits an “On-Off control” digital signal.

Key features :

Capabilities

Depending on the layout of RES2 sensors on the toll lane, different measurements may be provided, such as the detection of :
- Motorcycles (2 wheels),
- Reversing vehicles,
- Dual wheels.
Example RES sensor layout scheme and possible application :

OperationSpecificationsPicturesDocumentations

Detection process for toll classification of vehicles

The sensor is installed in the toll lane, after an induction loop.

When a vehicle enters the toll lane, the vehicle is classified as follows::

Detection of the metal mass of the vehicle by the loop: Connection / Capella BCL.
The signal is analysed by the BCL detector and transmitted as an “all-or-nothing” signal to the classification electronics.
Detection of the vehicle axles by the resistive sensor (RES1 or RES2): Connexion / Capella DR2.
The signal is analysed by the RD2 detector and transmitted as an “all-or-nothing” signal to the classification electronics.
The classification electronics receive the signals from both detectors (RD2 and BCL).
Depending on the signals received, the device will classify the based on the registered classification.

Specific shape for easy and extremely quick maintenance,
Minimum pressure for activation : 80kg,
Precision of detection : 99.9%,
Detection speed : 0 (static) to 90 km/h (0 to 56 mph) (maximum),
MTBF : 4 million axles,
Operating temperature : -20°C to +75°C (-4°F to 167°F),
Protection index : IP67,
Insensitive to the concrete slab vibration.

Technical sheet - Resistive sensor RES2