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The Passenger Counting Unit (PCU) is the heart of PMT's APC System. The PCU contains a microcomputer, and interfaces to the Treadle Switches, the Bus Interface Unit (BIU), and the communication ports. PCU Features
Detailed DescriptionThe Passenger Counting Unit contains the processing power for the passenger counting functions, as well as the communications with the outside world. All passenger counting signals from the vehicle connect directly, or through the BIU, to the PCU, where all the information is processed into raw passenger counting data. The PCU monitors switch closures in the treadles of each stepwell, and determines, with the use of a finite state algorithm, whether a passenger has entered or exited the vehicle It also monitors the odometer pulses and door switch signals to determine when a bus stop occurs.For each stop thus identified, the PCU will store the passenger count for each door, odometer count, arrival time, departure time and dwell time as a bus stop record in its memory. This data represents raw passenger counting data, which then has to be matched to the appropriate route, and analyzed for passenger activity, schedule adherence or other desired information. The latter functions are performed in post-processing, either by user-supplied software, or by the database/analysis software available through PMT. |
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Updated 08 FEb 2002