Mechanism Research Of Distributed Wearable Devices Navigation Technology

As a representative of the multitude of information technology,navigation technology is embedding into our daily life in all minutiae.With the development and progress of the society and the growing demand of people for positioning and navigation,pedestrian navigation research become a hot.Due to special application scenarios of pedestrian navigation and satellite signal of global navigation satellite system are susceptible to interference and shade,relying on global satellite positioning system like GPS has been unable to meet the needs of people on the location.The inertial navigation technology,which is not subject to interference from the outside environment,gradually become the main technology for autonomous navigation of pedestrians.First of all,based on the distributed wearable micro inertial measurement unit pedestrian navigation scheme,in this paper the inertia parameters of the waist,arm,leg,foot in a person’s walk were measured by micro inertial measurement unit.According to the analysis,the movement characteristics of each part in a person’s walk was obtained.Based on the above analysis,this paper puts forward three kinds of distributed inertial navigation measurement unit.1,Pedestrian navigation scheme based on double micro inertial measurement unit on single foot;2,Pedestrian navigation scheme based on double micro inertial measurement unit on both feet;3,Pedestrian navigation scheme based on double micro inertial measurement unit on the waist and foot.The constraints and error correction technology were selected aiming at the different installation site of micro inertial measurement unit in every kind of scheme.Secondly,through the comparative analysis the pedestrian navigation scheme based on double micro inertial measurement unit on the waist and feet was selected.the zero speed characteristic of foot movement was used to conduct zero speed correction on strapdown decoding speed and position error.The error between the course for calculating the waist and feet was used to correct the pedestrian navigation system course and the kalman filter was used on zero velocity and course correction,which could help realize that distributed micro inertial navigation measurement unit conduct the pedestrian navigation.Finally,according to the contrast analysis on the above schemes and existing experimental conditions,the pedestrian autonomous navigation system platform based onthe waist,feet double micro inertial measurement unit was built to conduct the pedestrian walking experiment and get the pedestrian walking routes,which aim at verifying the pedestrian autonomous navigation scheme based on the distributed micro inertial measurement unit in this paper.