The Project54 common interface for the intelligent transportation systems data bus

Abstract

Police cruisers have a variety of afermarkef equipmenf such (IS lighfs, sirens, radar unifs, mdios, efc Mosf police afermarkef equipment was not designed with infegafion in mind In order IO allow the integration of eledronic equipment in police cruisers a common interface for connecfing afermarkef car electronics lo an Intellirent Transporfafion Sjsfems Data Bus (IDB) was designed and implemented The interface hardware uses Version 2.OB of the Control Area Network (CAN) profocol as fhe method of bidirectional daIa transmission on rhr IDB. As a means Io conned the affermarket devicrs IO the IDB the inferface has hvo optiom The firsf qp o/ connecfion offered is a serial porf fhat YWS standard RS-232 signaling. The second fype of connrnion is a pod that offers Jive parallcl TTL lrwl i i p a h fhaf can be used for a variety of appiiirorions including swirehing. The cammor intcr/acr b rurrenfly being insfdIed in severol NH Stare Pdirr Cruisers IniIial tesfs show Ihe sysrem IO be rrliobk .

Project54: standardizing electronic device integration in police cruisers

“…The IDB standard prescribes both the hardware components and the protocol needed to accomplish control tasks and to exchange information between the car's systems. 3 Most devices meant for police cruisers can't connect to the IDB; however, most have serial and/or parallel inputs and outputs. We developed the Common IDB Interface, an embedded device that can interface to electronic products serially or in parallel and can communicate with the IDB.…”