Research Of Vehicle Terminal Based On Android And OBD And Its Application To Driving Behavior Evaluation

As the world's largest automobile producer and consume,the Chinese Internet of Vehicles hold a huge market space.From the automobile to the Internet of Vehicles system,this ongoing process is the lifeblood of Chinese economy.The latest figures suggest China had more than 290 million registered vehicles including 194 million automobiles,the number of motor vehicle drivers has reached 360 million,among them 310 million automobile drivers as of 2016.In this case,the auto insurance market,at the same time of vigorous development there are also occurred some issues,malign competition,high road accident rates,lead to lower profits in auto insurers.Therefore,a differentiated insurance program designed by different driving behavior,vehicle history failure and other data is significant.Capturing operational information with vehicle information systems and OBD(On Board Diagnostic)and combining with large data mining algorithms analyze driver's driving behavior and vehicle conditions.Based on the above background,this dissertation has developed the vehicle terminal combined with an Android operating system equipment and WEB platform,which can monitor vehicle travel data and fault conditions in real time,then upload datas to the server in real time,and analyze and model driving behavior assessment through a large number of vehicle datas.Firstly,a system architecture is built.The vehicle terminal is divided into three parts,respectively vehicle data acquisition and fault diagnosis system,Android client and WEB platform.The hardware interface of the first two parts is analyzed and designed.Vehicle data acquisition and fault diagnosis system collect vehicle datas through the OBD interface from the vehicle inside the ECU in real time.It transmits the real-time data to Android client using the Cortex-A9 processor through bluetooth interface,then uploads data to the WEB platform through wireless communication technology.Secondly,the core function software of Android client and the WEB platform of vehicle terminal system have been developed and designed.Android client implements three core functions,respectively communication between Android side and vehicle OBD system,vehicle OBD data acquisition and uploading and map service.WEB platform implements three core functions,respectively the data storage and analysis,appearance of data graph anddata record query.Thirdly,the datas are processed by stepwise regression analysis,and the optimal regression mathematical model is established by the significance test to evaluate the behavior of drivers and provide references for the differentiated insurance schemes in the auto insurance industryFinally,this dissertation verifies the feasibility and reliability of vehicle terminal through the Android client function test and WEB platform function test.