| Due to the rapid development of social industry level,people’s working environment is becoming more and more complex,which brings many problems in people’s life and work.Especially in military,transportation,fire protection,logistics and other fields,accurate and fast positioning information is particularly important.At present,the satellite navigation system is widely used.Although satellite navigation systems are very mature,they can only provide stable positioning services in outdoors.The use of satellite navigation system in indoor or sheltered elevated environment will have many limitations.However,there is no positioning method that can meet the high requirements of interior and outside environment at the same time.Therefore,people need a good interior positioning method to seamlessly connect with outdoor location,so as to realize the integration of interior and outside positioning.In this paper,we design an interior and outside integrated location system based Beidou location and RSSI location.This design uses wireless signals of outside Beidou satellite location and indoor positioning,and a combination of handheld devices(mobile phone and tablet computer)to display the user’s corresponding longitude,latitude and altitude position information.This information can be transmitted or retained for query by communication through the data transfer module.The systematic design includes hardware design and software design.The software part connects with the background database to get and process the data of longitude,latitude,altitude and time,and show location information through the same API,so that the position on the map can be seen intuitively.The hardware part provides data 4G communication,indoor and outdoor positioning,sensors and other chip modules,and uploads the collected data to the background database.Through the combination of hardware and software,the system utilizes Beidou satellite outdoor positioning technology,RSSI location technique,interior/outdoor location toggling skill to realize the humanized positioning mode with independent module,high integration degree,convenient maintenance and complete functions.After selection and testing,it can be found that the time required for positioning is fast and accurate,the hardware and software connections is reliable,the power dissipation and price are relatively low,and it can be used in logistics,transportation,fire protection and other environments. |
