Research On Ultrasonic Network Positioning Method For Indoor Mobile Vehicle

In the age of information technology,with the continuous breakthroughs in cloud computing and the new iterations of Io T technology,"location" as a member of information has gradually developed and played an important role in people’s daily life,the development of new technological products and industrial production,especially in large public environments,such as intelligent courier sorting,large shopping centres In particular,location services play a pivotal role in large public environments such as intelligent courier sorting,large shopping centres,airports,giant arenas and other areas.Especially in the mobile Internet era,where 5G technology and starlink technology are fully promoted,the demand for location-based services is driving the development of indoor positioning technology at a fast pace.Among the several existing indoor positioning technologies,ultrasonic positioning technology requires a stable system platform hardware and simple structure,which is suitable for rapid deployment in large and complex environments;the existing ultrasonic sensors are relatively cheap,so the ultrasonic positioning system is arranged at a low cost;ultrasound is sound in nature,so the lower speed of sound is conducive to signal processing compared to light signals;ultrasound is not affected by electromagnetic fields,light and fog,and Ultrasound is not affected by electromagnetic fields,light and fog,and colour,so ultrasonic signals have strong anti-interference ability and are suitable for indoor positioning.This article will focus on ultrasonic positioning from three aspects: system structure layer,algorithm optimisation layer and hardware circuit layer,and build an indoor ultrasonic positioning system for locating moving objects,taking into account possible situations.The article starts with a study of the development and iteration of relevant localisation technologies at home and abroad,then analyses and simulates the principle of ultrasonic localisation systems and common algorithms;then analyses the scope of ultrasonic localisation,proposes a layout scheme based on regular graphics in combination with the scope,and simulates the layout scheme to verify the feasibility;after completing the layout scheme,the positioning algorithm is analysed,and the time-based compensation is proposed in combination with the characteristics of the moving trolley.After completing the layout scheme,the positioning algorithm is analysed,the concept of time-based compensation factor is proposed and the related algorithm optimisation is simulated;then the Kalman filter is added to the whole algorithm for real-time correction,considering that the direction and speed of the cart movement are known;finally,the circuit and hardware of the whole system are designed and implemented with the layout scheme and the optimised algorithm.After the layout,algorithm optimisation and circuit design are completed,the whole system is combined.The ultrasonic positioning system was tested for the positioning of stationary carts and for the positioning of carts moving at constant speed.Through the experiments,it was confirmed that the functional modules of the whole system worked well and the positioning accuracy reached the expected results.The whole solution can well improve the positioning accuracy of moving objects,especially when the object to be positioned moves at a uniform speed,the positioning accuracy tends to be stable and can well position the object with a certain speed.