Synchronization of Event Data Recorder (EDR) Data to Data from the CAN Bus and LabVIEW in emulated non-deployment and deployment laboratory experiments

摘要

Research on the Event Data Recorder (EDR) and Crash Data Retrieval (CDR) at the University of Malta was extended to also cover a deployment event, i.e. a crash of enough severity that an airbag deployment is commanded. The experimental campaign was based on emulation of vehicle and engine parameters (wheel speeds, vehicle speeds, engine speed) such that experiments were performed in the laboratory while the Electronic Control Units (ECUs) sensed the vehicle as if being driven under various conditions. Over hundred non- deployment events were performed on a single Airbag Control Module (ACM). However the deployment event freezes the ACM, i.e. the ACM cannot be reused. Data of the only one deployment event performed was captured by the EDR, LabViewand a CAN bus sniffer simultaneously. Synchronization of these three different data acquisition platforms was thus required and is discussed in this publication. The synchronization of EDR to CAN bus data was implemented by using an Inertial Measuring Unit transmitting onto the CAN bus. Synchronization of LabViewanalog input data was synchronized by means of a circuit that silenced a purposely injected CAN message.