Utilization of Onboard Diagnostic II (OBD-II) on Four Wheel Vehicles for Car Data Recorder Prototype

The government has required public transport provider to equip their fleets with information tools if their fleets get in an accident. Currently, the collection of evidence of motor vehicle accidents by the authorities has not included data on the condition of the vehicle before the occurrence of the accident. Unlike an aircraft accident investigation that includes aircraft condition data derived from various sensors recorded in Flight Data Recorder (FDR). The recording data in FDR can be the evidence of the accident and it is expected to add to the accuracy of an accident investigation. Car Data Recorder Prototype is a system capable of recording the condition of four-wheeled vehicles and notify if there has been an accident. Vehicle condition recording utilizes Onboard Diagnostic-II (OBD-II) feature with parameter recording: gas pedal position, engine speed, vehicle speed, and engine temperature. Accident detection utilizes the ADXL345 accelerometer sensor and the condition of open or non-open airbag vehicles monitored by Diagnostic Trouble Code (DTC). If there is an indication of an accident, notification in the form of SMS will be sent by using GSM SIM800L module. Testing the data recording feature prototype car data recorder performed on city car is able to take advantage of features OBD-II to record the parameters that have been determined. Recorded data is processed into graphical information showing the position of the gas pedal, engine speed, vehicle speed, and engine temperature within a specified time range. There is a 5-second delay in recording data of engine speed and speed of the vehicle, but the data pattern of recording engine rotation is identical with 84.8% accuracy while the data of vehicle speed recording is also synonymous with 74.4% accuracy. Based on the accident simulation results, the ADXL345 and DTC accelerometer can detect frontal collisions and airbag conditions, which triggers GSM SIM800L to send SMS notification.