Making system for underwater 3D terrain of construction position of trailing suction hopper dredger

Abstract

A making system for underwater 3D terrain of a construction position of a trailing suction hopper dredger comprises a rabble arm position system, a ship position system, a data processing system and a graphic generation and display system, wherein the rabble arm position system comprises rabble arm equipment and a PLC (programmable logic controller); the ship position system comprises a GPS (global positioning system) beacon, an electric gyrocompass and a control computer; angle sensors for measuring angles of a rabble arm and a suction port pressure sensor for detecting a suction port state of the rabble arm are mounted on the rabble arm; the GPS beacon is mounted at the top of a cab; the electric gyrocompass is mounted in the middle of a navigation station; the angle sensors and the suction port pressure sensor are connected with a detection signal input end of the rabble arm position system through signal cables; the signal input end of the rabble arm position system is connected with a collection system of the PLC; the GPS beacon and the electric gyrocompass are connected with the control computer through a data transmission line; the collection system of the PLC and the control computer are connected with the data processing system through a gateway; the data processing system is connected with the graphic generation and display system through the gateway.

Description

technical field [0001] The invention belongs to a channel dredging application system, in particular to a system for providing underwater 3D topography for the construction of trailing suction dredgers. Background technique [0002] The more advanced water depth measurement equipment currently in use is the multi-beam sounding system, whose remarkable feature is that it can transmit and receive a column of beams at a time. Under the condition that the factors such as the measurement ship speed are properly controlled, the multi-beam sounder can survey an area. The full-coverage surface sounding improves the operational efficiency of the survey ship and provides convenience for water depth measurement. However, since the multi-beam bathymetry system needs to be measured by multiple sensors, there are many observation values ​​and many error sources (such as the delay effect of positioning and sounding, the influence of seabed topography, weather conditions, instrument install...

AI Technical Summary

Problems solved by technology

During the measurement process, the roll deviation and pitch deviation caused by the lateral angle and longitudinal angle during the installation of the multi-beam system, the navigation delay and gyro compass deviation caused by the ship sailing, the change of the tide level (reference datum), and the sound velocity of the seawater medium The change of the structure will lead to the displacement of the measuring point, which will affect the accuracy of the seabed sounding and lead to the distortion of the seabed shape.

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