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Container falling early warning system and method for container ship

A container ship and early warning system technology, applied in the direction of alarms, measuring devices, instruments, etc., can solve the problems of reducing the probability of container falling into the sea, and achieve the effects of preventing container falling accidents, avoiding falling events, and reducing transportation risks

Pending Publication Date: 2020-02-18
上港集团长江港口物流有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide an early warning system and method for a container ship falling into the sea, which can predict whether the container has the risk of falling into the sea by monitoring the rolling and tilting state of the hull, so as to solve the technical problem of how to reduce the probability of the container falling into the sea

Method used

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  • Container falling early warning system and method for container ship
  • Container falling early warning system and method for container ship
  • Container falling early warning system and method for container ship

Examples

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Embodiment 1

[0049] See figure 1 , the present invention provides a container ship drop warning system comprising: a ship posture monitoring device 100, a drop container early warning analysis device 200 and an alarm prompt device 300; the ship posture monitoring device 100 and the alarm prompt device 300 are respectively connected The early warning analysis device 200 is electrically connected; the ship posture monitoring device 100 is used to send the acquired ship's lateral inclination angle to the box drop early warning analysis device 200; The angle and the measurement time interval of two adjacent lateral inclination angles obtain the lateral inclination angular acceleration, and the cumulative number of times that the lateral inclination angle and the lateral inclination angular acceleration are respectively higher than the threshold value set in the falling box early warning analysis device 200 exceeds When the number of times is set, the alarm prompting device is triggered to send...

Embodiment 2

[0068] On the basis of Embodiment 1, this embodiment provides a container ship crash warning method, the method comprising the following steps:

[0069] Measure and obtain the functional mapping relationship F(x) between the ship heel angle and the critical fall angular acceleration under the critical state of container fall, and the static minimum fall angle x m ;

[0070] The function mapping relationship F(x) is fitted to a straight line function G(x) by the least square method;

[0071] Transform the horizontal and vertical coordinates of the function G(x) to the original 0.9 times to obtain the fall warning function U(x);

[0072] In the set data monitoring time period, the ship’s heel angle is collected at the same time interval and the ship’s heel angle acceleration is calculated according to the two adjacent ship heel angle acquisition data; in any data collection, if the absolute value of the ship’s heel angle greater than the static minimum fall angle x m ; or the...

Embodiment 3

[0077] This embodiment is on the basis of embodiment 1, with Figure 5 The freighter structure of the shown freighter is taken as an example to describe the analysis process in the falling container early warning analysis device in detail. In order to clarify the positive and negative of the ship’s rolling angle, the establishment of Figure 5 The Oxy right-handed Cartesian coordinate system shown fixed to the ship. The X-axis direction is the bow direction; looking from the stern to the bow, the port side is the positive direction of the Y-axis, and the roll angle is positive clockwise around the X-axis; the Z-axis is along the vertical direction, and the upward direction is positive, and the roll angle acceleration is around the X-axis. The clockwise axis is positive. In this system, unless explicitly marked, the unit of time is second, the unit of angle is degree, the unit of angular velocity is degree per second, and the unit of angular acceleration is degree per square s...

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Abstract

The invention aims at providing a container falling early warning system and method for a container ship, thereby solving a technical problem of reducing the probability of container falling into thesea by monitoring the rolling inclination state of a ship body. The early warning system comprises a ship attitude monitoring device, a container falling early warning and analysis device and an alarmprompt device. The ship attitude monitoring device and the alarm prompt device are connected with the container falling early warning and analysis device electrically. The ship attitude monitoring device is used for sending an obtained transverse inclination angle of a ship body to the container falling early warning and analysis device; and the container falling early warning and analysis deviceis used for acquiring a transverse inclination angle acceleration according to the transverse inclination angle and a measurement time interval of two adjacent transverse inclination angle measurement and triggering the alarm prompt device to send out alarm information under the condition that the accumulated frequency sum of exceeding a thread set in the container falling early warning and analysis device by the transverse inclination angle and the transverse inclination angle acceleration respectively exceeds a set number of times. Therefore, whether a container falls is determined in advance.

Description

technical field [0001] The invention relates to the technical field of early warning of container ship falling, in particular to an early warning system and method for container ship falling. Background technique [0002] With the continuous development of economic globalization, more and more items are shipped in the form of containers, resulting in increasingly frequent activities of large container ships. However, due to the complex and changeable marine environment, accidents of container falling into the water occur from time to time. Under the joint action of torsion, vibration and shaking in strong winds and waves, the lashing rods and turnbuckles used to fix the containers will gradually lose their effect, resulting in almost completely "free" state of the containers stacked on the deck. Containers used on container ships in the prior art are usually in the shape of cuboids, and the stacking method on container ships is usually that the length of the container is al...

Claims

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Application Information

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IPC IPC(8): G08B21/24G01C9/00
CPCG01C9/00G08B21/24
Inventor 姜伟程斌刘开龙冯上民裴志勇陶代洁吴卫国陈泓锟陆小乐鲁全斌
Owner 上港集团长江港口物流有限公司
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