Book 2012 des projets Systematic

Diagnosis0-DEFECTOutil de Diagnostic Embarquéde Faisceaux AUTomobilesON GOINGPROJECTEmbedded systems are equipped with diagnosis functions, but the wired network, whichis a critical system, is not considered. In 2006 the project SEEDS has proven thefeasibility of a wire diagnosis system usable in garage for maintenance or embedded forharness monitoring purpose. The objectives of 0-DEFECT are to study and implementmethods more adapted to embedded diagnosis. The previous method provides tencentimeters localization accuracy for hard defects, but is not compatible with embeddedconstraints (EMC and interaction of the diagnosis signals with those of the network).New methods will be implemented, the models will be refined and prototypes will bebuilt and tested in the vehicle, aiming at proving viability and feasibility for an embeddedwire diagnosis system.TECHNOLOGICAL OR SCIENTIFIC INNOVATIONSThe main scientific and technical objectives inthe project are:◗ Online diagnosis of real topology cable network(in a concurrent way to the normal functioningof the network),◗ Low cost detection & localization of hard defectswith a few centimeters accuracy,◗ Solving the localization ambiguity of ramifiednetworks,◗ Detection of the degradation premises of connectors,follow-up of the evolution of degradationparameters and way of measuring them,Integration of a wire diagnosis system inside a car ECU.◗ Study of the embedded diagnosis architecture,◗ Microelectronic integration study, in an objective of diffusion in the automotive domainafter end of the project.STATUS - MAIN PROJECT OUTCOMESA new diagnosis method suited for embedded application has been developed andtested: called MCTDR (Multi Carrier Time Domain Reflectometry) it separates thespectra of diagnosis and useful signals to cancel any possible interaction that wouldlead to false alarms or communication jamming.The integration of the MCTDR system inside the automobile ECU is currently under teston a real automotive harness. This system can monitor 4 lines at a time. Harmlessnessand EMC compliance remain to be confirmed.Specifications for the diagnosis chip have been provided.The integration study of the chip has shown that the best solution is to connect adiagnosis chip to the existing architecture of the calculator.CONTACTFabrice AUZANNEAUCEA LIST+33 (0)1 69 08 60 00fabrice.auzanneau@cea.frPARTNERSLarge companies:DELPHI, FREESCALE,PSA PEUGEOT CITROËNRENAULT TRUCKSResearch institutes, universities:CEA LIST, INRIA,SUPELEC LGEPPROJECT DATACoordinator:CEA LISTCall:ANRStart date:August 2009Duration:36 monthsGlobal budget (M2):4.1Funding (M2):1.914Automotive & Transports WG