The Technology Research Of The Embedded Wireless Location Tracking System

At present, wireless location technology is widely used in the field of car navigation. However, because the car navigation system is limited by volume and power consumption, there are some limitations in flexibility and can not be carried with oneself. In addition, among the common GPS positioning handles, mobile phones and other products, some of them bias in positioning tracking and some bias in the communications, so combining positioning and communication is also a hot research topic. For example, public security, prison custody, criminals escort all put forward the combination of positioning and communication. There are certain problems in the separate positioning method. For example, GPS positioning method may not locate if there are less than four stars which been carried, and radiolocation positioning accuracy is too low. How to combine the various positioning methods in order to positioning anywhere and meet the accuracy requirements is also a focus of current researches.Based on the above, researching practical embedded wireless location tracking system is of great signification. The paper proposes a method to solve the above problems, designs an embedded wireless location tracking system which uses GPS positioning as its main tracking method and network positioning as a secondary way, completes the positioning data communication via the GSM/GPRS network.The system is divided into two parts of the position tracking signal source and the tracking management handset. The paper studies the theoretical basis associated with the system, concerns about the selection of the devices based on small and low-power requirements. On this basis, the paper completes the drawing of the system hardware circuit and circuit board production. The system selects NEO-5M to receive satellite positioning signals, LEON-G100to complete the auxiliary positioning and mutual transmission of information. Otherwise, the system provides a control button, a LCD display module, and designs the USB interface circuit to facilitate follow-up data processing and map matching. Finally, on the basis of completing hardware design and software design, study some filtering methods to deal with data and carry out simulations, do a group of tests, preliminary verify that the system’s error is beyond5m and has good stability.