CN100537350C - Electric immergence monitoring system for watercraft - Google Patents
Electric immergence monitoring system for watercraft Download PDFInfo
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- CN100537350C CN100537350C CNB2006101253667A CN200610125366A CN100537350C CN 100537350 C CN100537350 C CN 100537350C CN B2006101253667 A CNB2006101253667 A CN B2006101253667A CN 200610125366 A CN200610125366 A CN 200610125366A CN 100537350 C CN100537350 C CN 100537350C
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Abstract
The invention discloses an electric ship draft monitoring system, which relates to a ship draft monitoring system. The invention is formed by a slave which is equipped with four electric draft scales, a system host arranged inside a cockpit and a RS485 bus. The system host comprises a microprocessor (100) and external memory storages (600), clock circuits (200), keyboard circuits (300), liquid crystal display circuits (400) and audible and visual alarm circuits (700) which are respectively connected with the microprocessor (100). A first slave (800), a second slave (900), a third slave (1000) and a fourth slave (1100) which are respectively arranged on port forward, starboard forward, port aft and starboard aft are respectively connected with interfaces of host microprocessor (100) through the RS485 bus and interface circuits (500). The invention is capable of automatically collecting the ship draft information, providing the corresponding technical support for the reasonable loading and navigation of the ships. The invention has the advantages of high measuring precision, swift control, reliable communication and good real-time, and can be widely used for the draft monitoring of various ships in rivers and seas.
Description
Technical field
The present invention relates to a kind of drauht monitoring system, relate in particular to a kind of drauht monitoring system based on plane capacitance electric immergence scale.
Background technology
For a long time, the boats and ships load-carrying of China's shipping is calculated many by manually finishing, especially the class sources of goods such as coal, sand, ore calculate trouble, and accuracy is not high, shipment need by virtue of experience reach eye-observation draft scale error in addition, and is often improper because of loading, especially the owner of cargo is to goods said to weigh seriously unfounded (conceaing), easily causes the unbalance and stability of boats and ships to descend, not only influence the operational configuration of boats and ships, the safety of navigation of the direct threatens vessel of possibility when serious.
Summary of the invention
The present invention is directed to above-mentioned drawback, aim to provide a kind of automatic electric immergence monitoring system for watercraft.
Technical scheme of the present invention is:
Constitute by the slave that four plane capacitance electric immergence scales are housed and the system host in the cockpit and RS485 bus; System host comprise microprocessor 100 and respectively with microprocessor 100 bonded assembly external memory storages 600, clock circuit 200, keyboard circuit 300, liquid crystal display circuit 400, sound light alarming circuit 700; Be positioned at that boats and ships are left front, right front, left back, the 1st, 2,3,4 slaves 800,900,1000,1100 of the right back side of a ship are connected with the serial ports of host microprocessors 100 respectively by RS485 bus and interface circuit 500;
Described the 1st slave 800 is a kind of devices that are used for measuring draft and the river or the sea temperature of the left front side of a ship of boats and ships;
Described the 2nd, 3,4 slaves the 900,1000, the 1100th, a kind of device that is used for measuring the draft of the right front side of a ship of boats and ships, the left back side of a ship, the right back side of a ship respectively.
Principle of work of the present invention is:
By host setting navigable zone (fresh water or sea water density) information, prestowage information, main frame and the 1st, 2,3,4 slaves 800,900,1000,1100 are realized half-duplex operation by RS485 bus and interface circuit 500,1st, 2,3,4 slaves 800,900,1000,1100 are sent to microprocessor 100 with the draft data and the water temperature data of the left and right preceding side of a ship of the boats and ships that collect and the left and right back side of a ship, show trim, heel and the overload information of boats and ships after microprocessor 100 calculates on the liquid crystal display of liquid crystal display circuit 400 in real time.Trim (heel or overload) situation occurs as boats and ships, then make corresponding warning, the adjustment of reminding the crewman to be correlated with by microprocessor 100 guide sound optical alarm circuits 700.
In detail:
The microprocessor 100 of main frame is carried out half-duplex operations with four slaves that are positioned at the left and right preceding side of a ship of boats and ships and the left and right back side of a ship by RS485 bus and interface circuit 500 and is communicated by letter, the drinking water information and the water temperature information of the side of a ship and the left and right back side of a ship before the real-time automatic collecting boats and ships are left and right are in the Mean Draft that calculates and write down boats and ships Before Loading and trim, heel data.
During shipment, by keyboard circuit 300 input navigable zone (fresh water or sea water density) information, prestowage information comprises presetting and desires cargo kind, quantity, volume and weight information, stow sequencing, port of destination and port of call unloading information.In loading process, behind the drinking water data handing of microprocessor 100 with the left and right preceding side of a ship of the boats and ships that receive and the left and right back side of a ship, on the liquid crystal display of liquid crystal display circuit 400, show the Mean Draft of shipment process and trim, heel and the load-carrying data of boats and ships in real time.As the boats and ships trim appears or heel unbalance, microprocessor 100 guide sound optical alarm circuits 700 send unbalance alerting signal, prompting crewman and loading and unloading person adjusts mobile goods and puts the position; Automatically send the overload warning signal when presetting weight as surpassing.After shipment finishes, the present invention will generate the plan for adjustment Lay list of thing weight information and the ballast water of freighting automatically.
In the navigation, the real-time monitoring calculation of electric immergence monitoring system also shows trim, the heel data of the Mean Draft and the vessel of shipment process.As the boats and ships trim appears or heel unbalance, then sound light alarming circuit 700 sends unbalance alerting signal automatically, the prompting steersman adjusts the position of vessel navigation, during the water entering accident that especially causes because of hit a submerged reef, collision etc., captain or first mate can according to the head and the tail of boats and ships, about the electric immergence data of two sides of a ship implement to reduce ballast water or fresh water, shift operations such as bunker oil and goods.
About during two sides of a ship drinking water balance, the present invention is according to the survey boats and ships head of institute, the tail drinking water, calculate Mean Draft, utilize again by tonnage scale, the data bank that hydrostatic force parameter and curve generate is looked into than the displacement that goes out boats and ships, hydrous water density correction (being keyboard input fresh water or seawater zone water tightness value), the coolant-temperature gage correction, shell coefficient correction (oneself is stored in the electric immergence monitoring system microprocessor in advance according to each ship actual parameter) draws the actual displacement (promptly equaling to form every weight sum of boats and ships) of boats and ships, and the increment of displacement during shipment (other condition is constant) can be considered the weight of the instant thing of freighting.Especially. the class sources of goods such as coal, sand, ore are weighed calculate easily and fast and have a higher accuracy.For super large mixed boat and cargo ship, in order to monitor drauht better, can set up two electric immergence scales at Chuan Zhongchu; Otherwise, also can consider only in ship for small-sized transship goods wheel about on the shell wall of two sides of a ship two electric immergence scales of installing get final product.In addition, the common draft scale of eye-observation still can be engraved on the shell, keeps sailor's observation habit.
The present invention has following advantage and good effect:
1, the present invention can gather drauht information automatically, and real-time monitoring calculation and show stowage of goods weight, Mean Draft and trim, the heel data of boats and ships, the corresponding techniques support is provided for the reasonable loading and the safety of navigation of boats and ships;
2, have the survey precision height, control is flexible, reliable communications, the good all advantages of real-time;
3, can be widely used in the drinking water monitoring of all kinds of boats and ships of rivers,lakes and seas.
Description of drawings
Fig. 1 is a structured flowchart of the present invention;
Fig. 2 is the host circuit schematic diagram;
Fig. 3 is main frame sound light alarming circuit figure;
Fig. 4 is the 1st slave schematic circuit diagram that are positioned at the left front side of a ship of boats and ships;
Fig. 5 is the temperature measurement and the transmission circuit schematic diagram of the 1st slave;
Fig. 6 is the 2nd slave schematic circuit diagram that are positioned at the right front side of a ship;
Fig. 7 .1 is an electric immergence scale structure scheme drawing,
Fig. 7 .2 is the containment structure scheme drawing,
Fig. 7 .1 is the electric immergence scale containment structure scheme drawing of packing into.
Wherein,
100-host microprocessors.
200-host clock circuit.
300-host keyboard circuit,
310-keyboard interface circuit, 320-host keyboard.
400-main frame liquid crystal display circuit,
410-address latch, 420-liquid crystal display circuit.
500-RS485 bus and interface circuit.
600-external memory storage circuit,
610-decoder, 620-memory chip
700-main frame sound light alarming circuit.
800-the 1 slave,
810-electric immergence scale and signal conditioning circuit, 820-slave microprocessor,
830-analog to digital conversion circuit, 840-RS485 bus interface circuit,
850-conversion switch circuit, 860-temperature measurement circuit,
870-temperature measurement signal V/I transmission circuit, 880-temperature measurement signal I/V transmission circuit.
900-the 2 slave,
910-electric immergence scale and signal conditioning circuit,
920-slave microprocessor, 930-analog to digital conversion circuit, 940-RS485 bus and interface circuit.
1000-the 3 slave.
1100-the 4 slave.
A-insulation material negative, B-metal pool bar, C-shelter-clad, D-aperture;
A-first lead, b-second lead.
The specific embodiment
Below in conjunction with drawings and Examples, the present invention is further described:
1, main frame
Among Fig. 2,
1) host microprocessors 100 is selected the 89C55 microprocessor for use.
2) clock circuit 200 is selected the DS1302 clock chip for use.
3) keyboard circuit 300 is selected ZLG7290 keyboard interface chip 310 for use and is equipped with 5 * 4 keyboards 320.
4) liquid crystal display circuit 400 comprises SN74F373 address latch 410 and HD44780 liquid crystal display circuit 420.
5) RS485 bus and interface circuit 500 comprise the MAX485 chip;
6) external memory storage 600 comprises 74LS138 decoder 610 and MCM6264 memory chip 620.
The 89C55 microprocessor 100 of main frame passes through P1.1, P1.5, and the INT0 mouth is connected with clock circuit 200, the T1 of 89C55 host microprocessors 100, T0 and INT1 link to each other with keyboard interface chip ZLG7290 circuit 310, the Dig0 of keyboard interface chip ZLG7290 circuit 310, Dig1, Dig2, Dig3 and SegA, SegB, SegC, SegD, SegE links to each other with keyboard circuit 320, the P0 mouth of 89C55 host microprocessors 100 and ALE mouth are connected with HD44780 liquid crystal display circuit 420 by SN74F373 address latch 410,16 of 89C55 host microprocessors 100,17 pin (access hole) and P2.7 mouth are connected with HD44780 liquid crystal display circuit 420 by NAND gate circuit 74LS04,89C55 host microprocessors 100 is connected with MCM6264 memory chip 620 with 74LS138 decoder 610 by SN74F373 address latch 410, MCM6264 memory chip 620 is carried out data write, the RXD of 89C55 host microprocessors 100, TXD and P1.0 mouth link to each other with RS485 bus and interface circuit 500, thereby form the monitoring system main frame.
3, the main frame sound light alarming circuit 700
Among Fig. 3, be depicted as the sound light alarming circuit 700 of monitoring system main frame.
The P1.2 of host microprocessors 100, P1.3, P1.4 mouth are respectively by NAND gate 74LS04 control relay JK1, JK2, JK3 coil break-make, relay J K1, JK2, one group of normal opened contact of JK3 cross limit with heel, trim respectively and the overload warning lamp links to each other, three Warning light L1, L2, L3 send the light of different colours respectively so that difference, relay J K1, JK2, another group normal opened contact parallel control alarm voice chip of JK3 KD9561 break-make, its output is sent the news of reporting to the police by LM386 and is rung.
4, as Fig. 4, electric immergence monitoring system the 1st slave comprises: electric immergence scale and signal conditioning circuit 810, slave microprocessor 89C51 chip 820, analogue to digital conversion AD574A chip 830, RS485 bus and interface circuit 840, analog switch MAX333A chip 850, temperature measurement circuit 860, temperature measurement signal V/I transmission circuit 870, temperature measurement signal I/V transmission circuit 880.
Wherein electric immergence scale and signal conditioning circuit 810 comprise: ICL8038 sine wave generator circuit 811, follower 812, see-saw circuit 813, sinusoidal waveform phase shifter 814, sinusoidal waveform/square wave conversion circuit 815, electric immergence rule sensor 816, metering circuit 817,4066A analog switch 818, active low-pass filter 819;
The sine wave signal that ICL8038 sine wave generator circuit 811 produces is the driving source of electric immergence rule sensor 816 through the signal of follower 812 outputs, it is again the derived reference signal of sinusoidal waveform phase shifter 814, this is exported one the tunnel and connects electric immergence rule sensor 816, a tunnel and connect sinusoidal waveform phase shifter 814 input ends through see-saw circuit 813.Sinusoidal waveform phase shifter 814 exports sinusoidal waveform/square wave conversion circuit 815 to and finishes the control end of delivering to analog switch 818 after the waveform transformation, the height of water level changes, the variation that is converted to electric signal in real time by electric immergence rule sensor 816 reaches the input end of metering circuit 817, the mouth of metering circuit 817 is delivered to variable signal the input end of analog switch 818, the sinusoidal signal of metering circuit 817 outputs and the same frequency square wave after the phase shift are realized related operation by analog switch 818, operation result exports active low-pass filter 819 to, and the low frequency signal of active low-pass filter 819 outputs is delivered to the NC3 input end of change-over swith MAX333A chip 850.
Fig. 5 is the 1st slave temperature measurement and transmission circuit; Quartz conductor temperature measuring A/D 590L sensor inputs to survey water temperature electric signal LM3140 chip 871 end of oppisite phase of temperature measurement signal V/I transmission circuit 870 and links to each other with the mouth of voltage-reference REF10 chip 872 through temperature measurement circuit 860, output 6 pin of LM3140 chip 871 link to each other with V/I circuit I NA105 chip 873 input ends 2 pin, INA105 chip 873 mouths link to each other through the outer meeting resistance of shielded cable with the RCV420AG chip 881 input end IN+ of temperature measurement signal I/V transmission circuit 880, and RCV420AG chip 881 mouths are connected with the NO3 of MAX333A change-over swith 850 through 882 outputs of in-phase amplifier OPA111 chip.
P1.4 mouth control MAX333A change-over swith 850 water levels of slave microprocessor 820 and the switching of water temperature signal.The output COM3 of MAX333A change-over swith 850 inserts A/D converter AD574 chip 830 input ends, the I/O mouth of the mouth of AD574 chip 830 and corresponding controling end and microprocessor AT89C51 joins, slave microprocessor 820 can read in AD574 chip 830 transformation results judging the height of water level (and water temperature) by the I/O mouth, and realizes serial communication by RS485 bus and interface circuit 840 with main frame.
5, electric immergence monitoring system the 2nd slave
As Fig. 6, electric immergence monitoring system the 2nd slave comprises: electric immergence scale and signal conditioning circuit 910, slave microprocessor 920, AD574A analog to digital conversion circuit 930, RS485 bus and interface circuit 940.
Electric immergence monitoring system the 2nd slave 900 circuit structures are not except that establishing dress temperature measurement and transmission circuit, analog switch, and other are all identical with the 1st slave 800 circuit, are used for measuring the draft of the right front side of a ship of boats and ships.
Electric immergence monitoring system the 3rd, 4 slaves 1000,1100 and the 2nd slave 9000 circuit structures are in full accord, are used for measuring the draft of the left back side of a ship of boats and ships, the right back side of a ship.
6, electric immergence scale structure
As Fig. 7 .1, electric immergence scale (sensor) is made of the staggered metal pool bar B that is embedded on insulation material (as poly fourfluoroplastics) the base plate A, and these metal pool bars B is divided into two groups, links to each other with the signal conditioning circuit input end by lead a, b respectively.This electric immergence scale surface is topped insulation, acid-fast alkali-proof waterproofing coating, but perception river to be measured (sea) water floods degree to sensor, the water level message can be converted to electric signal, the electric immergence scale can be designed to plane or curve form, (needing according to the ship side shaped design) and identical being installed on the cooresponding shell wall of ship side, the calibrated error of electric immergence scale can be carried out the software correction by the microprocessor of four slaves.
As Fig. 7 .2, shelter-clad C is that a kind of and adaptive outside face of electric immergence scale is that fleetline has lid, the betal can at its following no end on it, and the betal can bottom is provided with limber hole D.
As Fig. 7 .3, electric immergence scale outside face is equipped with the shelter-clad C of shield earthing.
Second nearby other ship influence that drinking water is measured to this ship of maskable first can effectively isolate the winding to draft scale of pasture and water and other water surface drift.Be installed on boats and ships left and right before the 1st, 2,3,4 slaves of four electric immergence scales on the side of a ship and the left and right back side of a ship communicate by letter with the host microprocessors of cockpit interior draft monitoring system and adopt RS485 sata standard bus implementation half-duplex operation.
In addition, on the other shell wall of the left front side of a ship electric immergence of boats and ships scale, water temperature detection line pipeline is housed, the bottom of water temperature detection line pipeline is lower than the least draft line, and be provided with the iron-clad quartz conductor temperature probe of corrosion-resistant steel and directly monitor river (sea) flowing water temperature, design has water repellant gas-tight silo in the water temperature detection line pipeline, after temperature measurement circuit and current transducer circuit, water temperature information are housed in the gas-tight silo convert current signal to, input to through water temperature detection line pipeline inner cable on the slave microprocessor 820 of the 1st slave 800 nearby by transmitter circuit.The microprocessor of four boats and ships electric immergence scales is formed principal and subordinate's multi-computer serial communication with the microprocessor in the electric immergence monitoring system for watercraft of controlling in the storehouse.
During electric immergence monitoring system for watercraft work, earlier by keyboard input navigable zone (fresh water or sea water density) information, prestowage information; Comprise presetting and desire cargo kind, quantity, volume and weight information.Stow sequencing, port of destination and port of call unloading information, electric immergence monitoring system will generate the plan for adjustment Lay list of thing weight information and the ballast water of freighting automatically.
During ship-loading operation, electric immergence monitoring system (main frame) is through RS485 bus and four electric immergence scales (slave) polling communication, the head and the tail of real-time automatic collecting boats and ships, about two sides of a ship drinking water information and water temperature information, monitoring calculation also shows trim, the heel data of the Mean Draft and the vessel of shipment process, as the boats and ships trim appears or heel unbalance, electric immergence monitoring system sends unbalance alerting signal automatically, and prompting crewman and loading and unloading person adjust mobile goods and put the position.
After shipment finishes, about during two sides of a ship drinking water balance, the present invention is according to the survey boats and ships head of institute, the tail drinking water, calculate Mean Draft, utilize again by tonnage scale, the data bank that hydrostatic force parameter and curve generate is looked into than the displacement that goes out boats and ships, hydrous water density correction (being keyboard input fresh water or seawater zone water tightness value), the coolant-temperature gage correction, shell coefficient correction (oneself is stored in the electric immergence monitoring system external memory storage in advance according to each ship actual parameter) draws the actual displacement (promptly equaling to form every weight sum of boats and ships) of boats and ships, and the increment of displacement during shipment (other condition is constant) can be considered the weight of the instant thing of freighting.The electric immergence monitoring system on-line monitoring calculates and shows the stowage of goods weight of shipment process, sends overload sound and light alarm signal when presetting weight as surpassing automatically.
In the navigation, the electric immergence monitoring system monitoring calculation also shows trim, the heel data of the Mean Draft and the vessel of shipment process.As the boats and ships trim appears or heel unbalance, automatically send unbalance alerting signal, the prompting steersman adjusts the pose of vessel navigation, during the water entering accident that especially causes because of hit a submerged reef, collision etc., captain or first mate can according to the head and the tail of boats and ships, about the electric immergence data of two sides of a ship implement to reduce ballast water or fresh water, shift operations such as bunker oil and goods.
Claims (6)
1, a kind of electric immergence monitoring system for watercraft is characterized in that:
Constitute by the slave that four plane capacitance electric immergence scales are housed and the system host in the cockpit and RS485 bus; System host comprise microprocessor and respectively with microprocessor bonded assembly external memory storage (600), clock circuit, keyboard circuit, liquid crystal display circuit, sound light alarming circuit; Be positioned at that boats and ships are left front, right front, left back, the 1st, 2,3,4 slaves of the right back side of a ship are connected with the serial ports of host microprocessors respectively by RS485 bus and interface circuit (500);
Described the 1st slave is a kind of device that is used for measuring draft and the river or the sea temperature of the left front side of a ship of boats and ships;
Described the 2nd, 3,4 slaves are a kind of devices that are used for measuring the draft of the right front side of a ship of boats and ships, the left back side of a ship, the right back side of a ship respectively.
2, according to the described a kind of electric immergence monitoring system for watercraft of claim 1, it is characterized in that:
The 1st slave comprises electric immergence scale and signal conditioning circuit, slave microprocessor, analog to digital conversion circuit, RS485 bus and interface circuit, change-over swith, temperature measurement circuit, temperature measurement signal V/I transmission circuit, temperature measurement signal I/V transmission circuit;
Electric immergence scale and signal conditioning circuit output are connected with the change-over swith input, and change-over swith (850) output is connected with analog to digital conversion circuit, and the slave microprocessor is connected with change-over swith, analog to digital conversion circuit (830), RS485 bus and interface circuit respectively;
The 1st slave also is provided with temperature measurement and transmission circuit; Quartz conductor temperature probe and temperature measurement circuit link to each other with the discharge circuit end of oppisite phase of temperature measurement signal V/I transmission circuit and the mouth of voltage-reference, the output of discharge circuit links to each other with V/I chip input end, the V/I chip output links to each other through the input end of shielded cable with temperature measurement signal I/V transmission circuit, and I/V transmission circuit mouth is connected with change-over swith through in-phase amplifier output.
3, according to the described a kind of electric immergence monitoring system for watercraft instrument of claim 1, it is characterized in that:
2nd, 3,4 slaves all are made up of electric immergence scale and signal conditioning circuit, slave microprocessor (920), analog to digital conversion circuit, RS485 bus and interface circuit; Electric immergence scale and signal conditioning circuit output are connected with analog to digital conversion circuit, and the slave microprocessor is connected with analog to digital conversion circuit, RS485 bus and interface circuit respectively.
4, according to the described a kind of electric immergence monitoring system for watercraft instrument of claim 1, it is characterized in that:
The electric immergence scale is made of the staggered metal pool bar that is embedded on the insulation material negative, and metal pool bar is divided into two groups, links to each other with the signal conditioning circuit input end by two leads respectively;
Electric immergence scale surface is topped insulation, acid-fast alkali-proof waterproofing coating;
The electric immergence scale is designed to plane or curve form, and identical being installed on the cooresponding shell wall of ship side.
5, according to the described a kind of electric immergence monitoring system for watercraft instrument of claim 1, it is characterized in that:
Electric immergence scale outside face is equipped with the shelter-clad of shield earthing;
Described shelter-clad is that a kind of and adaptive outside face of electric immergence scale is that fleetline has lid, the betal can at its following no end on it, and the betal can bottom is provided with the limber hole.
6, according to the described a kind of electric immergence monitoring system for watercraft of claim 1, it is characterized in that by tonnage scale, hydrostatic force parameter and curve, water tightness correction, the database storing that coolant-temperature gage correction, the correction of shell coefficient are formed is in external memory storage, host microprocessors is connected with memory chip with decoder by address latch, and memory chip is carried out data write.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101253667A CN100537350C (en) | 2006-12-08 | 2006-12-08 | Electric immergence monitoring system for watercraft |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101253667A CN100537350C (en) | 2006-12-08 | 2006-12-08 | Electric immergence monitoring system for watercraft |
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| CN101195405A CN101195405A (en) | 2008-06-11 |
| CN100537350C true CN100537350C (en) | 2009-09-09 |
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| CNB2006101253667A Expired - Fee Related CN100537350C (en) | 2006-12-08 | 2006-12-08 | Electric immergence monitoring system for watercraft |
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Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101628612B (en) * | 2009-08-19 | 2011-08-17 | 河海大学 | Draught transfinite pre-warning system and pre-warning method |
| CN102050211B (en) * | 2010-12-02 | 2013-01-23 | 徐传仁 | Intelligent water gage weighing device for ship |
| CN102147616A (en) * | 2011-05-27 | 2011-08-10 | 赣州天目领航科技有限公司 | SKW real control network field bus |
| CN104085511A (en) * | 2014-06-30 | 2014-10-08 | 田广祥 | System using seats for controlling ship draft |
| CN104316133A (en) * | 2014-11-06 | 2015-01-28 | 江苏华豪航海电器有限公司 | Liquid level measurement device of ship liquid cargo cabin |
| CN104362749A (en) * | 2014-11-10 | 2015-02-18 | 国家电网公司 | Fuse alarm extension device based on star extension |
| CN106741706B (en) * | 2017-01-11 | 2019-02-26 | 江苏科技大学 | A kind of attitude of ship and drinking water measuring device and its measurement method |
| CN107458553A (en) * | 2017-07-28 | 2017-12-12 | 广船国际有限公司 | A kind of modification method of drauht value |
| KR102197665B1 (en) * | 2018-08-27 | 2020-12-31 | 가부시키가이샤 큐메이 | Gm calculation system, method and program thereof, and shear wave period prediction system, method and program thereof |
| CN112124510A (en) * | 2020-09-24 | 2020-12-25 | 广船国际有限公司 | Ship draft monitoring device and monitoring method |
| JP6948554B1 (en) * | 2021-01-28 | 2021-10-13 | 株式会社ステップ・ケイ・スリー | Draft surface detection method for ships and draft control system |
| CN113060253A (en) * | 2021-04-29 | 2021-07-02 | 广船国际有限公司 | Redundant design method for cabin immersion detection and ship |
| CN113247197B (en) * | 2021-07-01 | 2022-03-15 | 金睛兽数字科技(重庆)有限公司 | Ship electronic water gauge measuring method and system |
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