Installing a passenger counting system in trains, trams or subways requires a slightly different configuration. Trains are separated in cars, and our system must be compartimented accordingly.
Depending on the number of doors on each car, we will need a multiple-sensor bar for each door and an on-board computer with a network card for each car. The head car will also have a GPS antenna and a data transfer device such as a radio modem.
The multiple-sensor bars are installed above the doors, where they detect people coming in and going out of the train. The sensors signals are sent to the car's on-board computer. All on-board computers are networked together, so only one data transfer device is necessary.
The GPS antenna for trains is mounted externally. It is installed on the roof, near the front of the head car. The GPS antenna is connected to the on-board computer.
The on-board computer in the head car can also be connected to vehicle signals, such as the engine or the odometer. These signals are used to know when to count passengers (when the engine is turned on). Coupled with GPS data, the vehicle's signals are also used to localise stops.
The data collected in the on-board computer can be transferred manually with the Data-Collector. For automatic transfers, a radio modem modem is installed inside the head car, near a window. A similar radio modem is installed in the garage and connected to a computer where data is dumped regularly.