The English Proceedings of the College of Instru ion&Electrical Engineering.n University,in the Second Half of 013 Pedestrian Dead Reckoning Device Design Based on STM32 Luo Yin,Lu Hongzhou,Zhao Yu,Wang Jun College of Instrumentation and Electrical Engineering.Jilin University.Changchun 130012. China Abstract-We put forward a new design of pedestrian dead reckoning device based on the portability and practicality.The device uses lsM303DLHC integrated with a three-dimensional ascelerometer and an eleetronis compassand MPU3050 the mationof Pedestrian.T Cortex-M3 dead-reckoning information of pedestrian on a TFTLCD.Experiments prove that the device has the high precision of dead-reckoning and satisfies the requirement of practical application. Key words-STM32F103RBT6:multi-sensor:heading:step count:track display sofware on the computer,it is not very useful,while in INTRODUCTION the outdoor,the portability of the computer is not high so the development of a portable.practical pedestrian IN the wild woodlands,rocky areas or the urban region dead reckoning device is very necessary for the above of design shortcomings combined with the characteristics ng navigatio of pedestrians dead recko ingwe design a portable will descend because of the signal block,it even can't and practical pedestrian dead reckoning device.It uses finish positioning in some circumstances.Therefore in three-dimensional accelerometer and electronic recent years self-contained positioning scheme based compass integrated chip LSM303DLHC and on movement characteristics for pedestrians has gyroscope integrated chip MPU3050.multiple sensors become a research hot po Most of the accuracy y of collected i solutions use wearable to complet movement.and ARM Cortex .M3 pedestrian dead reckoning(PDR).such as Lei FangI micro-controller core STM32F103RBT6 as a data extracted motion information by the sensors worn or processing unit The real-time processing pedestrian the pedestrian waist and transmitted the informatior dead reckoning information is displaved on a to the computer to complete pedestrian dead TFTLCD,which has high data processing accuracy reckoning Laur Ojeda2]set the gyroscope and also meet the needs of portability and practicality three-dimensional accelerometer on the foot to extrac information then transmitted it to a computer and use 1 SYSTEM COMPOSITION AND WORKING PRINCIPLE Matlab software for 3D image processing.SUN Zuolei[]used the particle filter and probabilistic The pedestrian dead reckoning device contains a neural network to identify andflte heading sensc motion information and improved the accuracy of a display module,the specific composition diagram is pedestrian dead reckoning.However,the information shown in Figure I. of PDR of these designs is produced by specialized 期 The English Proceedings of the College of Instrumentation & Electrical Engineering, Jilin University, in the Second Half of 2013 6 Pedestrian Dead Reckoning Device Design Based on STM32 Luo Yin,Lu Hongzhou,Zhao Yu,Wang Jun College of Instrumentation and Electrical Engineering,JiLin University,Changchun 130012， China Abstract—We put forward a new design of pedestrian dead reckoning device based on the portability and practicality.The device uses LSM303DLHC integrated with a three-dimensional accelerometer and an electronic compass,and MPU3050 integrated with a gyroscope to collect the real-time movement information of pedestrian.The Cortex-M3 core STM32F103RBT6 in the device collects data produced by the sensors,performs pedestrian dead reckoning and displays the dead-reckoning information of pedestrian on a TFTLCD.Experiments prove that the device has the high precision of dead-reckoning and satisfies the requirement of practical application. Key words—STM32F103RBT6;multi-sensor;heading;step count；track display INTRODUCTION IN the wild woodlands, rocky areas or the urban region located with skyscrapers,the positioning accuracy of global satellite positioning navigation system(GPRS) will descend because of the signal block,it even can’t finish positioning in some circumstances.Therefore in recent years,self-contained positioning scheme based on movement characteristics for pedestrians has become a research hot spot.Most of the adopted solutions use wearable multi-sensor to complete pedestrian dead reckoning(PDR),such as Lei Fang[1] extracted motion information by the sensors worn on the pedestrian waist and transmitted the information to the computer to complete pedestrian dead reckoning.Lauro Ojeda[2] set the gyroscope and three-dimensional accelerometer on the foot to extract information then transmitted it to a computer and use Matlab software for 3D image processing.SUN Zuolei[3] used the particle filter and probabilistic neural network to identify and filter the pedestrian motion information and improved the accuracy of pedestrian dead reckoning.However, the information of PDR of these designs is produced by specialized software on the computer,it is not very useful,while in the outdoor, the portability of the computer is not high, so the development of a portable, practical pedestrian dead reckoning device is very necessary.For the above design shortcomings combined with the characteristics of pedestrians dead reckoning,we design a portable and practical pedestrian dead reckoning device.It uses three-dimensional accelerometer and electronic compass integrated chip LSM303DLHC and gyroscope integrated chip MPU3050, multiple sensors ensure the accuracy of collected information of pedestrian movement,and ARM Cortex-M3 micro-controller core STM32F103RBT6 as a data processing unit.The real-time processing pedestrian dead reckoning information is displayed on a TFTLCD, which has high data processing accuracy and also meet the needs of portability and practicality. 1 SYSTEM COMPOSITION AND WORKING PRINCIPLE The pedestrian dead reckoning device contains a heading sensor module, a data processing module and a display module, the specific composition diagram is shown in Figure 1