Quick and high-precision coordinate calibration method suitable for large-scale seabed transponder arrays

Abstract

The invention provides a quick and high-precision coordinate calibration method suitable for large-scale seabed transponder arrays. The method comprises the following steps: (1) selecting 3 to 4 transponders for calibrating dynamic geometric geodetic coordinates; (2) completing the measurement of distance among the transponder arrays by using a remote control based acoustic calibration method; and (3) solving the geodetic coordinates of each transponder by using a geometric method. The quick and high-precision coordinate calibration method is characterized in that: by combining a dynamic geometric geodetic coordinate calibration method and the remote control based acoustic calibration method, transponders are managed and controlled by radio / water acoustic remote control instructions, so long-baseline high-precision measurement advantages are maintained, and large-scale long-distance sailing of a working ship can be avoided simultaneously to realize high-efficiency operation.

Description

technical field [0001] The invention relates to a hydroacoustic positioning measurement method, and mainly relates to a method for calibrating geodetic coordinates of array elements of long baseline seabed transponders. Background technique [0002] Long-baseline hydroacoustic positioning technology has the advantages of wide range of action and high positioning accuracy. It is widely used in various fields of marine operations and plays an important role in geophysical surveying, seabed landform detection, scientific investigation, and mineral resource development. The underwater vehicle sails in the long-baseline submarine transponder array, and uses the transponder as a reference to measure its own position in the transponder array, and then completes the navigation and positioning solution. The coordinates of the transponder are used as reference coordinates, and its measurement accuracy directly affects the navigation and positioning accuracy of the long baseline system...

AI Technical Summary

Problems solved by technology

The long baseline intersection method is to select at least 3 measurement points on the water surface to complete underwater acoustic ranging, and use the spherical intersection method to complete the solution of the geodetic coordinates of the transponder in combination with the GPS coordinates of the measurement points. The advantage of this method is that it has high measurement accuracy. However, for a large-scale submarine transponder array, it is necessary for the working ship to sail around the array, which is time-consuming and labor-intensive, and the efficiency is low

The ultra-short baseline method and the short baseline method are to install the array on the bottom of the survey ship, and coordinate calibration can be completed through a single measurement. However, the disadvantages of this method are that the array is small in scale and the measurement accuracy is low, which makes it difficult to meet the high-precision measurement requirements. , when calibrating multiple transponders, it still needs to sail long distances to reduce the measurement slant distance, and the efficiency is low

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