Dynamic-to-dynamic real-time measurement system

Abstract

The invention discloses a dynamic-to-dynamic real-time measurement system. The dynamic-to-dynamic real-time measurement system is applied to a motion carrier and comprises a GNSS receiver, a carrier phase difference processing unit and wireless communication transmission equipment. When the motion carrier serves as a reference station, the GNSS receiver transmits a received satellite carrier phase observation value to a motion carrier serving as a mobile station through the wireless communication transmission equipment; when the motion carrier serves as a mobile station, the wireless communication transmission equipment receives a satellite carrier phase observation value of a reference station, the satellite carrier phase observation value combines the satellite carrier phase observation value received by the GNSS receiver of the motion carrier, and the relative position of the reference station and the mobile station is obtained through calculation via the carrier phase difference processing unit; on the basis of relative position data, through interaction of attitude data (like gyroscope attitude determination) between the reference station and the mobile station and data fusion calculation, relative position altitude data can be further obtained. The dynamic-to-dynamic real-time measurement system can reach centimeter-level relative position measurement accuracy.

Description

technical field [0001] The invention relates to the technical field of navigation and positioning, in particular to the real-time high-precision relative positioning technology between motion platforms. Background technique [0002] In application requirements such as air refueling docking guidance and dense formation flight, effectively obtaining accurate relative positioning data between two carriers is the key to realizing the application. Since the carriers that need to be positioned are all moving carriers, the positioning accuracy is high. Traditional positioning methods For example, the method based on inertial navigation data difference calculation is limited by the influence of factors such as terrain height data error and inertial navigation equipment navigation error increasing with time accumulation, so it is difficult to guarantee relative positioning accuracy. [0003] The satellite navigation system (GNSS) receives the navigation positioning and timing signals...

AI Technical Summary

Problems solved by technology

[0005] In recent years, the high-precision dynamic positioning method using fixed reference stations as reference points is the main form of differential positioning technology. Generally, GNSS carrier phase measurement technology is used to ensure positioning accuracy. This type of application is characterized by the use of fixed reference stations. Due to The real-time requirement of dynamic measurement requires the establishment of wireless data communication between the reference station and the dynamic user. Due to the effective coverage of the ground reference station, the cost of long-distance wireless transmission is huge in the environment far from the ground reference station (ocean). In addition, with the dynamic As the distance between the user and the base station increases, the differential positioning accuracy will also decrease

For applications such as formation flight, aerial refueling, aircraft landing, ocean formation navigation, and offshore platform operations, the main positioning requirement is often real-time high-precision relative positioning between moving carriers. Obviously, dynamic positioning based on fixed reference stations has limitations. It is difficult to meet the requirements. One solution is to set the reference station on the moving carrier. At present, this kind of dynamic-to-dynamic carrier phase difference technology is a pioneering research technology.

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