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Hardware architecture

The major problem in integrating the control of the various devices in a police cruiser is that in general the devices are not designed to be connected to any type of shared data bus. Each device uses different (and sometimes proprietary) electronic signaling and needs a special connection to the computer. Our solution to this problem, shown in Figure 2, was to design low-cost interface boxes, that we called Common IDB Interfaces (CIDBI), which sit between each device and an industry standard in-vehicle communications bus (Intelligent Transportation System Data Bus or IDB, using CAN version 2.0B).

Figure 2: Project54 software architecture