Automatic leakage alarm technology for liquid cargo tank of ship

Abstract

The invention discloses an automatic leakage alarm technology for a liquid cargo tank of a ship, and relates to the field of intelligent monitoring of ship safety. The automatic leakage alarm technology comprises the following steps: acquiring transient liquid level height of the liquid cargo tank by a cargo tank liquid level acquiring and transmitting unit, acquiring transverse and longitudinal dip angles of the ship by a ship shaking dip angle acquisition unit, correcting the liquid level height, and removing wind wave interference to obtain true liquid level height of the cargo tank; combining tank volume factor curve analysis and converting the true liquid level height of the cargo tank into real-time liquid cargo volume A of the cargo tank; defining an initial volume value B of liquidcargo of the cargo tank as 0 if a novel ship is not loaded, starting a liquid cargo loading and unloading pump each time loading and unloading after the ship operates normally, triggering a flow meter to acquire a flow signal of conveyed liquid cargo, and automatically correcting the initial volume B of the liquid cargo of the cargo tank; and continuously comparing and computing the real-time liquid cargo volume A of the cargo tank with the initial volume B of the liquid cargo of the cargo tank, and diagnosing whether the cargo tank has leakage or not by a comparing and leakage diagnosing unit. The automatic leakage alarm technology is quick and accurate in alarm, is slightly affected by a complex sea condition, and is suitable for various ship cargo tank structures.

Description

technical field [0001] The invention relates to the field of ship safety intelligent monitoring, in particular to an automatic alarm technology for ship liquid cargo tank leakage. Background technique [0002] Cargo tanks of ships are often loaded with a large amount of inflammable, explosive, toxic and harmful liquid dangerous goods (liquefied natural gas, liquefied petroleum gas, petroleum products). Once leakage occurs in marine accidents such as collision and grounding, if it is not discovered in time, it may cause disaster. Sexual consequences (fire, explosion, poisoning, frostbite). However, due to the complex navigation environment such as wind and waves and the complex structure of the ship's cargo tank, it is difficult to find the leakage of the ship's cargo tank. In the past, countless serious accidents at sea occurred, all of which were caused by failure to detect leakage in time. Accurate and rapid alarming of leakage accidents is conducive to quickly taking ef...

AI Technical Summary

Problems solved by technology

[0006] In view of the above-mentioned defects of the prior art, the technical problems to be solved by the present invention are the interference of complex sea conditions such as wind and waves; the difficulty of monitoring and alarming caused by the complexity and differentiation of the ship cargo hold structure; the difficulty of detecting leakage caused by the development trend of large ships; False alarms caused by ship loading and unloading operations

Images