The Classax Traffic Data Acquisition System
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 Fiber optic axle sensors from SENSOR LINE and inductive loops work well together. The abilities of them combined are more than the sum of the abilities of each, and the effort for installation of both is almost the same as for one of them. A combined setup can be used to solve virtually any problem of traffic data acquisition.
The original approach incorporated a three-sensor setup which was able to perform speed measurement with the TKV process. The signals were acquired with MA-100/110 interfaces connected to an ADC card in a PC which did the processing. An obsolete brochure is still available.
But CLASSAX has advanced. It has shown to be of special interest for toll collection applications where extreme speed measuring accuracy is not required, and so the TKV processing was discontinued. Thus, it can now be operated with a loop and only two axle sensors. Its full power, however, is obtained with a four-sensor setup which allows to include axle and tire widths into the vehicle characteristics. This yields really impressive accuracy even with difficult classification schemes.
Signal processing is also no longer performed with a separate PC but incorporated in an arrangement of two specially modified MD-220 interfaces which also operate the axle sensors. Thus, CLASSAX is a self-contained turnkey solution. Unlike other systems (e.g. IDRIS) it only needs to be plugged into some host computer which can directly process the classification results.
Since October 2006 CLASSAX has its own homepage. Please visit. |
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