Vehicle-mounted positioning device and positioning method

Abstract

The present invention discloses a vehicle-mounted positioning device and a positioning method. The vehicle-mounted positioning device comprises a GNSS module, an OBD module, a central control module and a communication module. The GNSS module outputs a GNSS vehicle speed and a GNSS original coordinate. The OBD module outputs an OBD vehicle speed and a steering angle. The central control module receives the GNSS vehicle speed, the OBD vehicle speed, the steering angle and the GNSS original coordinate, solves out a standard vehicle speed according to the OBD speed and the GNSS speed, calculates a vehicle instantaneous acceleration according to the standard vehicle speed, and figures out a data uploading frequency matched with the vehicle real-time information according to the standard vehicle speed, the acceleration and the steering angle. The communication module uploads a vehicle coordinate to an LBS platform according to the data uploading frequency figured out by the central control module. According to the technical scheme of the invention, the data uploading frequency and the uploaded data content can be automatically adjusted according to the information of the acquired vehicle speed, the acceleration, the vehicle steering angle and the like. Therefore, the flow is saved and the running track of a platform is displayed more uniformly and more smoothly. The vehicle running track can be displayed on the GIS platform more truly.

Description

technical field [0001] The invention relates to the field of vehicle positioning and navigation, and in particular relates to a vehicle positioning device and a positioning method. [0002] technical background [0003] GNSS satellite positioning technology has become more and more mature. With its remarkable features such as all-weather, high precision, automation, and high efficiency, as well as its unique powerful functions in positioning and navigation, timing and frequency calibration, and precision measurement, it has set foot in many application fields. . The vehicle-mounted GNSS navigation and positioning technology is an important application of GNSS positioning technology. Its main principle in the vehicle monitoring system is to receive GNSS position information through the vehicle-mounted device (composed of GNSS receiver, communication module, data storage and other functions), and through the vehicle-mounted device. The data is processed and encrypted, and the ...

AI Technical Summary

Problems solved by technology

[0004] For the existing vehicle positioning devices, most of the communication modules used are GSM modules, which can only support 2G networks, the data upload speed is slow, and the data packet loss is serious.

At the same time, due to the large positioning error of the GPS positioning system itself

[0005] The frequency of vehicle data uploaded by the existing vehicle positioning device is fixed, all of which are preset values. When it is necessary to display the vehicle trajectory, the trajectory cannot be accurately displayed on the map, and there is a large deviation in the inflection point

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