Automatic detection system for super draught of navigation vessel

Abstract

The invention discloses an automatic detection system for super draught of a navigation vessel. The automatic detection system comprises a measuring head, a measuring head lifting subsystem, a real-time data acquisition device, a data communication interface, a data processing and controlling subsystem and a display and operation panel, wherein the measuring head is connected to a steel wire rope of the measuring head lifting subsystem; the input end of the real-time data acquisition device is connected with the measuring head; the output end of the real-time data acquisition device is connected with the data processing and controlling subsystem through the data communication interface; and the data processing and controlling subsystem is connected with the display and operation panel. According to the automatic detection system, non-contact type automatic detection of (super) draught of the vessel during navigation is realized, the detection efficiency and the detection precision are increased and the detection cost is reduced.

Description

technical field [0001] The invention relates to a ship draft detection technology, in particular to an on-site automatic detection system for a ship's excess draft during navigation. Background technique [0002] The draft of a ship refers to the depth of the submerged part of the hull due to its own weight or load. The draft value of a ship reflects the displacement and cargo weight of the ship. "Overdraft" refers to the pursuit of economic interests of some domestic inland ships, which exceed the water depth standard for channel maintenance and sail, or exceed the maximum draft allowed by the ship due to overloading. Ships sailing with "overdraft" will not only damage the hull itself and endanger the lives of the crew, but may also change the direction of water flow after being grounded, causing sedimentation and other adverse conditions, thereby destroying the channel, causing the channel to be cut off or obstructed, and affecting the smooth flow of the channel And safet...

AI Technical Summary

Problems solved by technology

Ships sailing with "overdraft" will not only damage the hull itself and endanger the lives of the crew, but may also change the direction of water flow after being grounded, causing sedimentation and other adverse conditions, thereby destroying the channel, causing the channel to be cut off or obstructed, and affecting the smooth flow of the channel and safety, the hazards are enormous

[0003] At present, the existing ship draft detection methods mainly include: manual observation, ultrasonic water gauge, laser water level gauge, pressure sensor, sonar or laser imaging, etc., but there are many subjective factors, low detection accuracy, low degree of automation, and high labor intensity. Disadvantages such as large size, high device or system cost, and inconvenient use and maintenance

For example, the Chinese utility model patent "a ship water gauge" with the patent number ZL200720106838.4 refers to a ship water gauge, and the Chinese utility model patent "intelligent water detector" with the patent number ZL92208452.1 provides a measuring ship And the measuring instrument of load capacity, a portable ship draft measuring instrument mentioned in the Chinese utility model patent "Portable Ship Draft Measuring Instrument" with the authorized announcement number CN200985088Y, all need the inspectors to board the inspected ship to carry out the inspection. However, in actual law enforcement, it is obviously unrealistic to stop ships underway for testing

The Chinese utility model patent "ship draft depth detection device" with the authorized announcement number CN201989930U provides a ship draft depth detection device, and the Chinese utility model patent "ship draft depth acquisition system" with the authorized announcement number CN201980396U provides A ship draft depth acquisition system based on pressure sensors is installed directly on the ship to be detected, which obviously cannot be applied to law enforcement inspections

There are also on-site detection methods that do not affect navigation. For example, in the Chinese invention patent "A Ship Displacement Measuring Device and Its Measurement Method" with the publication number CN101216338A, a measuring device fixedly installed on the river bed and the underwater part of the river bank is used. It is mentioned in the Chinese invention patent of CN101628612A "ship draft over-limit early warning system and early warning method" that by setting a horizontal rod that can be lifted up and down underwater in the gateway, and detecting the height when the horizontal rod is in contact with the bottom of the ship, the draft over-limit alarm is performed. method, and the Chinese utility model patent "An Ultrasonic Sensor-Based Ship Draft Exceeding Warning System" with the authorized announcement number CN201800887U mentioned an ultrasonic sensor supplemented by video Although the early warning system can realize non-contact detection, due to the complex underwater situation, the detection accuracy is greatly disturbed by eddies, sundries, etc., and the installation and maintenance of the device are inconvenient. After the gateway is detected, the channel damage may become a fait accompli

There are also those that use image processing algorithms to calculate the draft of a ship. For example, the Chinese invention patent "ship draft dynamic detection system and detection method" with application publication number CN101913415A provides a dynamic detection system for ship draft using underwater laser arrays and underwater cameras. However, because the water quality of the Yangtze River is relatively turbid, the sediment content is high, and the visibility is extremely low. In this environment, whether the effective detection distance of the laser and the effective line-of-sight of the laser imaging equipment meet the requirements of super-draft dynamic detection still need to be passed. A large number of experiments are used to verify, and the system cost is high, and installation and maintenance are not convenient

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