Piezoelectric classification sensor : PF’2N
The PF-2N sensor is a ceramic piezoelectric sensor that delivers class II signals (20%). Once installed in the road surface, this sensor provides a signal for each axle of the vehicles moving over it. These signals are then used by the HERA Road Traffic Analysis Station to provide measurements of speed – axle numbers, length, classification, etc.
This sensor is custom made at our premises (maximum length of 2.2 metres).
The PF’2N sensors, depending on their sizes, can be used for other applications, for example :
- the On-Scale” (0.7 mètre) sensor, used to detect vehicles that are not centred on the lane.
- the “45 °” (2.2 metres) sensor, used to detect vehicles with dual wheel axles.
For classification of more than 2.20 metres, a PE2N sensor will be used. This is still a class II ceramic piezoelectric sensor, but is reinforced with a “U” shaped aluminium support. This provides a classification sensor that can reach up to 3.5 metres in length.
Key features :