|The count rates acquired by the detectors are continuously compared to the pre-set alarm thresholds; if a threshold is exceeded, the system immediately gives a warning to the operator through acoustic and luminous indications.
The standard system is composed of: 2 detectors, an electronic desktop rack and a PC control console.
The detectors are installed in a portal configuration: the two mechanical structures are installed one at each side of the passageway.
|The number of detectors can be adapted to the expected vehicle type or measurement geometry. Each detector is composed of a high-efficiency plastic scintillator facing the passageway, coupled with a PMT and the electronics for HV and signal processing. The detectors are properly shielded to lower the environmental background contribution. A set of transit sensors detects the vehicle’s transit and calculates its speed.|