GPS locating and tracking device and system

Abstract

The invention discloses a GPS locating and tracking device. The GPS locating and tracking device comprises a master control module, a memory bank, a 3G Modem, a GPS module and a key switch, wherein the memory bank, the 3G Modem, the GPS module and the key switch are respectively connected with the master control module. The GPS module is used for receiving a GPS signal and transmitting the GPS signal to the master control module to be processed. The GPS locating and tracking device further comprises a wireless communication module and a storage, and the wireless communication module and the storage are connected with the master control module. The key switch is used for switching on and off the communication module, the wireless communication module is used for conducting data exchange with an external server, and the storage is used for recording and storing GPS information. The invention further discloses a GPS locating and tracking system. According to the GPS locating and tracking device and system, a target can be positioned and tracked quickly in real time under a good GPS signal environment, and the target can also be positioned and tracked quickly and accurately under a weak GPS signal environment.

Description

technical field [0001] The invention relates to GPS positioning technology, in particular to a GPS positioning tracker and system. Background technique [0002] We know that the basic positioning principle of GPS is to track all GPS satellites, and calculate the coordinates, moving speed and time of the location of the GPS receiver in real time. It is required to receive at least three satellites before calculating the plane coordinates (latitude and longitude). value, the height value can be calculated after receiving four, and the accuracy can be improved if more than five. Like this because common GPS receiver needs to search all GPS satellites in positioning, so positioning is slow, generally needs 2-3 minutes. [0003] When the GPS signal is weak, the GPS positioning time will be very long, or even unable to locate, because the weaker the signal, the longer it will take for the receiver to complete the signal acquisition, and it may happen that the captured satellite s...

AI Technical Summary

Problems solved by technology

[0005] At present, the recognized GPS positioning tracker generally uses a combination of single-chip microcomputer, GPS module, and GSM module, or a combination of ARM chip, GPS module, and GSM module, and some use mobile phone function chips and GSM The combination of modules, when these solutions adopt a closed operating system, there are generally problems of slow positioning under normal signals, and GPS signal drift under weak GPS signals, slow or impossible positioning

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