Carrier phase differential-based dual-antenna integrated positioning and orientation system and method

Abstract

The invention relates to a carrier phase differential-based dual-antenna integrated positioning and orientation system and method. The system includes an antenna unit and a host unit, wherein the antenna unit is provided with two antennas which receive satellite navigation signals simultaneously, and the host unit comprises a main processing unit, an auxiliary processing unit, a differential data processing module and a differential orientation calculation module. The main processing unit and the auxiliary processing unit process signals received by corresponding antennas, and transmit synchronized original observed quantity to the differential data processing module after positioning is accomplished; the main processing unit and the auxiliary processing unit transmit respective original observed quantity data and positioning results to the differential orientating calculation module so that calculation can be performed; and finally, positioning, velocity measurement and orientation results of a whole unit can be obtained. With the dual-antenna integrated design adopted, the system of the invention has the advantages of small size, reliable use, high orientation precision, no time accumulated error and long stable working time; and differential calculation can be completed through a real-time calculation method, and the position and course results of a carrier can be obtained in a static state or dynamic state, and primary orientation time is short, and real-time performance is high.

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 applications such as architectural surveying, land surveying, aviation navigation and aerial surveying, position deployment, artillery ground surveying, radar communication, drone control, etc. . [0003] Traditionally, the platform compass system is mainly used to measure the direction and angle, but the system is generally bulky and has low reliability, 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...

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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