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Hull attitude calculation method and application

A calculation method and hull technology, applied in the direction of climate sustainability, instruments, measuring devices, etc., can solve the problems of high equipment installation and maintenance costs, achieve the effects of saving equipment installation, ensuring navigation safety, and improving data quality

Active Publication Date: 2020-11-03
OCEANOGRAPHIC INSTR RES INST SHANDONG ACAD OF SCI
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Problems solved by technology

The direct measurement method usually adopts the principle of laser ranging or ultrasonic ranging, which requires the installation of special optical and acoustic sensors, so the sensors need to be cleaned regularly, and the cost of equipment installation and maintenance is high

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  • Hull attitude calculation method and application
  • Hull attitude calculation method and application
  • Hull attitude calculation method and application

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Embodiment Construction

[0057] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention.

[0058] The invention provides a method for calculating the hull attitude, such as figure 1 As shown, the specific method is as follows:

[0059] (1) Observing the signal-to-noise ratio of the GNSS signal by using the ship-borne GNSS antenna and GNSS receiver:

[0060] Such as figure 2 As shown, the ship-borne GNSS antenna receives the superimposed signal of the direct satellite and the water surface reflection, and the coherence between the direct signal and the reflected signal is reflected in the fluctuation of the signal-to-noise ratio. The host computer receives and stores the NMEA standard format data sent by each GNSS receiver, and uses the $GPGSV statement to extract the current visible satellite signal carrier-to-noise ratio C / N of each GNSS receiver 0 , calculate ...

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Abstract

The invention discloses a hull attitude calculation method and application. The hull attitude calculation method comprises the following steps: (1) observing a GNSS signal signal signal-to-noise ratioby utilizing a shipborne GNSS antenna and a GNSS receiver; (2) inverting the height from the GNSS antenna to the water surface; and (3) fitting a hull attitude plane, and calculating a rolling angle,a pitching angle and heaving displacement; after the hull posture is obtained, mapping the hull external sensor mounting point and the design coordinate of the lowest point of the hull to the ship body posture plane through rotation and translation, obtaining the vertical height after coordinate transformation, and calculating the vertical height from the ship body external sensor to the water surface or the ship body draft. According to the method, metadata description of the measurement height can be provided for measurement data of an external sensor, the data quality is improved, the method and other draught depth measurement equipment installed on a ship supplement each other, and the navigation safety of the ship is guaranteed. Other external optical and acoustic sensors do not needto be installed.

Description

technical field [0001] The invention relates to a calculation method and application of hull attitude. Background technique [0002] When a ship is sailing, the hull is affected by factors such as load capacity, sea conditions, speed and course, and changes in attitude such as pitch, roll, and heave under the combined effects of wind, waves, and current. The instantaneous change of the attitude of the hull causes the vertical height of the sensors installed outside the hull and the superstructure to change from the water surface. Obtaining the vertical height of the sensor from the water surface in real time can be directly measured or indirectly calculated. The direct measurement method usually adopts the principle of laser ranging or ultrasonic ranging, and requires the installation of special optical and acoustic sensors. Therefore, the sensors need to be cleaned regularly, and the cost of equipment installation and maintenance is high. The indirect calculation method u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/53
CPCG01S19/53Y02A90/30
Inventor 胡桐仇志金王东明王中秋邹靖漆随平
Owner OCEANOGRAPHIC INSTR RES INST SHANDONG ACAD OF SCI
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