Dual-antenna integrated positioning and orientation system and method based on carrier phase difference

Abstract

The invention relates to a dual-antenna integrated positioning and orientation system and method based on carrier phase difference. The system includes an antenna unit and a host unit. The antenna unit is provided with two antennas and receives satellite navigation signals at the same time. Data processing module and differential orientation calculation module; the main / sub-processing unit processes the signals received by the corresponding antennas, and sends the synchronized original observations to the differential data processing module after the positioning is completed, and the main / sub-processing unit sends their respective original observations The observation data and positioning results are sent to the differential orientation calculation module for calculation, and finally the positioning, speed measurement and orientation results of the whole machine are obtained. The system of the present invention adopts a double-antenna integrated design, which is small in size, reliable in use, high in orientation accuracy, has no time accumulation error, and has a long stable working time; the differential calculation is completed by the real-time calculation method, and the carrier's position can be obtained under static or dynamic conditions. The position and heading results, the first orientation time is short, and the real-time performance is strong.

Description

technical field [0001] The invention relates to a satellite navigation positioning and orientation system, in particular to a dual-antenna integrated positioning and orientation system and method based on carrier phase difference. Background technique [0002] How to accurately and reliably obtain the position and direction of the measured object has a wide range of needs and application prospects in military and civilian application fields such as building surveying, land surveying, aviation and navigation surveying, position deployment, artillery surveying, radar communication, and UAV control. . [0003] Traditionally, the platform compass system is generally used to measure the direction and angle, but the system is generally bulky, and the reliability is not high, and the measurement accuracy drifts with time; in addition, its price is relatively high, which limits its wide application. However, high-precision measuring equipment is often in the hands of foreign equipm...

AI Technical Summary

Problems solved by technology

[0003] Traditionally, the platform compass system is mainly used to measure the direction and angle, but the system is generally bulky, and the reliability is not high, and the measurement accuracy drifts with time; in addition, its price is relatively high, which limits its wide application

However, high-precision measuring equipment is often in the hands of foreign equipment manufacturers. It is expensive and difficult to obtain. The initial orientation time is too long when used, and its accuracy changes with time. Long-term work will accumulate large errors.

[0004] The true north value can be obtained accurately by using theodolite or astronomical measurement method, but the instrument is relatively bulky, the measurement requirements are complicated, the calculation is quite cumbersome, the orientation efficiency is not high, and various random errors may be caused by equipment installation, calibration, reading, etc.

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