CN106643605B - Door body level jump real-time monitoring device and its monitoring method under ship gateway operation state - Google Patents

Door body level jump real-time monitoring device and its monitoring method under ship gateway operation state Download PDF

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CN106643605B
CN106643605B CN201710004667.2A CN201710004667A CN106643605B CN 106643605 B CN106643605 B CN 106643605B CN 201710004667 A CN201710004667 A CN 201710004667A CN 106643605 B CN106643605 B CN 106643605B
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door body
miter gate
water level
miter
door
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CN106643605A (en
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乌旭
熊木地
张旭东
王莹
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Dalian Maritime University
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Dalian Maritime University
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B21/00Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M13/00Testing of machine parts

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Abstract

The invention discloses door body level jump real-time monitoring device and its monitoring methods under a kind of ship gateway operation state, the monitoring device includes obliquity sensor, herringbone door rotation angle degree and water level sensor, obliquity sensor data acquisition and sending module, herringbone door rotation angle degree and water level sensor data acquisition and sending module, computer analysis and processing module, the analog signal of acquisition is AD converted with water level sensor data acquisition with sending module through obliquity sensor data acquisition with sending module and herringbone door rotation angle degree by obliquity sensor and herringbone door rotation angle degree and water level sensor respectively, data storage is sent with HSSI High-Speed Serial Interface data, and it receives and saves by computer analysis and processing module, and the analysis and processing of data are carried out in computer analysis and processing module;The present invention monitors miter gate's door body horizontal direction position hopping using obliquity sensor, not only easily and effectively, but also saves resources for research, facilitates installation and debugging.

Description

Door body level jump real-time monitoring device and its monitoring method under ship gateway operation state
Technical field
The present invention relates to Hydraulic Metal monitoring technical fields, in particular to a kind of Miter Lock Gates door body horizontal position The method of real-time of jump.
Background technique
Miter Lock Gates are one of the critical facilities of dealing ship upstream and downstream navigation, are undertaken to long-time high load capacity a large amount of logical Boat task, is opened and closed repeatedly and during charge and discharge water in miter gate, due to by water impact, underwater pressure change and door body metal The comprehensive function of the factors such as chemical attack, so that irreversible structural damage occurs in miter gate's door body, and then it is hidden to generate safety Suffer from.Existing detection method is periodically to suspend ship lock, expends a large amount of manpower and material resources and is manually overhauled, this method is not Normal shipping transport is only influenced, there is also the possibility of missing inspection, it is most important that can not know within prolonged non-turn(a)round The healthy operating status of current Miter Lock Gates is found the problem early it is therefore necessary to carry out real-time monitoring to miter gate, and and Shi Jinhang maintenance.
Miter gate causes door body inevitably to be ground due to up to a hundred tons of weight and a large amount of opening and closings repeatedly itself Damage, and abrasion embodies a concentrated reflection of at the door-hinge mushroom head of miter gate bottom, so the wear condition monitoring to mushroom head becomes people One of the important topic of word door operation health status monitoring.But mushroom head is in the position of the lower tens meters of depths of miter gate's bottom water On, contact surface easy to wear is in the state of closure at work, is difficult directly through existing direct surveillance or three-dimensional structure Measuring technique observes the current degree of wear.But because miter gate's door body can approximation regard a huge rigid body, door-hinge mushroom as The variation of door body horizontal position, generates during the abrasion of head and the structural damage of door body itself necessarily bring miter gate to be opened and closed The jump at inclination angle relative to horizontal direction, so the jump of real-time monitoring miter gate's door body horizontal position can be used as a weight Index is wanted to measure indirectly to miter gate's health status, and traditional method based on vibration calculating position hopping is because of interference Multipole is easily distorted, and data volume is huge, can not really reflect the transitional states when front door body, is not suitable for miter gate's jump Monitoring, so the relevant technologies for being badly in need of a kind of maturation carry out real-time measurement for the horizontal jump of miter gate position.
Summary of the invention
To solve the above problems existing in the prior art, the present invention will design a kind of jump that can really reflect when front door body Door body level jump real-time monitoring device and its monitoring method under change state and convenient and practical ship gateway operation state.
To achieve the above object, technical scheme is as follows: the jump of door body level is supervised in real time under ship gateway operation state Survey device, including obliquity sensor, herringbone door rotation angle degree and water level sensor, obliquity sensor data acquisition and transmission mould Block, herringbone door rotation angle degree and water level sensor data acquisition and sending module, computer analysis and processing module, the herringbone Door rotation angle degree and water level sensor include miter gate's angular sensor and water level sensor, the herringbone door rotation angle Spending sensor includes compass or encoder;Obliquity sensor and herringbone door rotation angle degree and water level sensor believe the simulation of acquisition Number respectively through obliquity sensor data acquisition and sending module and herringbone door rotation angle degree and water level sensor data acquisition and hair Module is sent to be AD converted, data storage sends with HSSI High-Speed Serial Interface data, and receives by computer analysis and processing module And preservation, and in computer analysis and processing module carry out data analysis and processing;
The obliquity sensor data acquisition and sending module includes A/D converter circuit, embedded control unit, storage Unit and high speed data interface;
The herringbone door rotation angle degree and water level sensor data acquisition and sending module include A/D converter circuit, insertion Formula control unit, storage unit and high speed data interface;
The obliquity sensor has one, is horizontally arranged at the upper of door body along the direction for being parallel to door body upper surface long side At surface;
Miter gate's angular sensor is horizontally arranged at the upper surface of door body;
The water level sensor is mounted on the lock wall at 2-3 meters of ship lock lowest water level or less;
The obliquity sensor data acquisition and sending module is integrated in the embedded Control system of obliquity sensor itself In system, herringbone door rotation angle degree and water level sensor data acquisition and sending module are integrated in the embedded control system of itself In, computer analysis and processing module is integrated in main control computer;
The monitoring method of door body level jump real-time monitoring device under ship gateway operation state comprising the steps of:
A, mounted angle sensor
Miter Lock Gates door body due to operation when bear huge load, cause door body to be easy to appear structural damage, The horizontal hopping amplitude of middle door body is an important indicator of door body operating status, therefore uses obliquity sensor real-time monitoring herringbone The horizontal hopping amplitude of door door body monitors the current safe operation state of miter gate's door body;The top of selected miter gate is inclination angle The installation site of sensor is installed an obliquity sensor in the horizontal direction for being parallel to door body, and will be inclined using industrial glue Angle transducer is fixed on specified position;
B, herringbone door rotation angle degree and water level sensor are installed
Since the process of Miter Lock Gates door body appearance level jump is a dynamic process, the amplitude of level jump Change with the state of miter gate's work operation, so the folding angle and ship of wanting real-time monitoring Miter Lock Gates door body current Height of water level these running state informations in lock;Miter gate's angular sensor is parallel to miter gate's door body and is placed in people At the upper surface of word door door body, to obtain the angle of miter gate and ship lock wall and upload to computer in real time;Water level is passed Sensor is mounted on the lock wall at ship lock lowest water level or less-rice;
C, miter gate's door body inclination data is acquired
Obliquity sensor is substantially a kind of acceleration transducer with principle of inertia, obliquity sensor acceleration of gravity Angle between the gravity vertical axis and acceleration transducer sensitive axis in direction is inclination angle;Obliquity sensor data acquisition and hair Module is sent to convert digital quantity for the collected electrical simulations amount of obliquity sensor by analog to digital conversion circuit, and by calculating To the inclination angle of Miter Lock Gates door body, computer analysis and processing module is uploaded to finally by communication interface and is stored and is shown Show;The obliquity sensor belongs to two-dimension tilt angle sensor, and there are two measurement directions for tool, and measurement obtains being parallel to door body respectively The inclination angle theta of longitudinal directionxWith the inclination angle theta perpendicular to door body longitudinal directiony
D, the jump amount of miter gate's door body is calculated by the inclination data of miter gate's door body
The jump amount of miter gate is one of important health index of miter gate, calculates the jump of miter gate's static state by inclination value Measurer has quickly and accurately advantage, and the jump amount calculation formula for being parallel to door body longitudinal direction is as follows:
hx=r tan θx
In formula: θxTo be parallel to door body longitudinal direction inclination value, r between miter gate's door body measured point and door-hinge away from From hxFor be parallel to door body longitudinal direction miter gate jump amount;
It is as follows perpendicular to the jump amount calculation formula of door body longitudinal direction:
In formula: θy(β) is the inclination value perpendicular to door body longitudinal direction rotated when angle is β, β0End is rotated for miter gate The angle value at moment, hyFor the jump amount of the miter gate perpendicular to door body longitudinal direction;
Total jump amount calculation formula of miter gate's door body is as follows:
In formula: h is total jump amount of miter gate's door body;
By calculate separately obliquity sensor be parallel to door body longitudinal direction with perpendicular to the jump amount of door body longitudinal direction, And then total jump amount of miter gate is calculated;
E, analysis and the dynamic hop amount data of miter gate's door body are handled
The jump variable data that miter gate's door body is handled by main control computer, by herringbone door rotation angle degree and water level sensor Obtained water level information and folding angle information and the jump variable information of miter gate's door body are integrated, and miter gate's hop value is obtained Switch gate and the two-dimensional signal of ship lock charge and discharge water period, information is judged one by one, obtain jump variable data in different items Value range and the secure threshold of determining inclination angle under various operating conditions under part, when the maximum value of this period jump amount is greater than Secure threshold just illustrates that this period miter gate is in misoperation position, when the minimum value of this period jump amount is less than secure threshold Illustrate that miter gate is in normal operational position at this time, formula is as follows:
In formula S indicate current safe state value, be worth for when represent at this time section miter gate be in abnormal operating condition, being worth is 0 Shi represents section miter gate at this time and is in safe operation state, hrIndicate the length value of the total jump amount of present period, htForefathers are worked as in expression The secure threshold of the jump amount of word door working condition, and the safe work state that current miter gate runs is judged with this.
Compared with the prior art, the advantages of the present invention are as follows:
1, traditional method required precision based on vibration calculating position hopping is high, needs to pass through algorithm to vibration acceleration It is converted into vibration displacement, complexity is calculated, to the more demanding of embedded control system, needs to handle a large amount of data, be difficult to protect It is undistorted to demonstrate,prove data, causes the research and development time long, higher cost.And the present invention is horizontal using obliquity sensor monitoring miter gate's door body Direction position hopping not only easily and effectively, but also saves resources for research, facilitates installation and debugging, is suitable for Miter Lock Gates door body Position hopping monitoring.
2, the present invention is available using aiding sensors such as compass formula angular transducer, temperature sensor and water-level gauges The dynamic folding angle information and dynamic water table information of the operation of current miter gate, so that accurately obtaining miter gate is currently at switch Which of door or charge and discharge water state, the secure threshold of miter gate's door body tilt angles of different conditions is not also identical, passes through The present safe work state of trouble free service threshold decision miter gate under different working condition, obtains valid conclusion.
Detailed description of the invention
The present invention shares 2 width of attached drawing, in which:
Fig. 1 is herringbone door and scheme of installation of the invention.
Fig. 2 is the flow chart of the method for the present invention.
In figure: 1, miter gate at the top of, 2, obliquity sensor, 3, aiding sensors, 4, obliquity sensor data acquisition and hair Send module, 5, auxiliary sensor data acquisition and sending module, 6, computer analysis and processing module.
Specific embodiment
Below with reference to attached drawing, a preferred embodiment of the present invention will be described in detail:
As shown in Figs. 1-2, door body level jumps real-time monitoring device, including obliquity sensor 2, people under ship gateway operation state Word door rotation angle degree and water level sensor 3, obliquity sensor data acquisition and sending module 4, herringbone door rotation angle degree and water level Sensing data obtains and sending module 5, computer analysis and processing module 6, the herringbone door rotation angle degree and level sensor Device 3 include miter gate's angular sensor and water level sensor, miter gate's angular sensor include compass or Encoder;Obliquity sensor 2 and herringbone door rotation angle degree sense the analog signal of acquisition with water level sensor 3 through inclination angle respectively Device data acquisition and sending module 4 and herringbone door rotation angle degree and water level sensor data acquisition and sending module 5 carry out AD and turn It changes, data storage and HSSI High-Speed Serial Interface data send, and receive and save by computer analysis and processing module 6, and counting The analysis and processing of data are carried out in calculation machine analysis and processing module 6;
The obliquity sensor data acquisition and sending module 4 includes A/D converter circuit, embedded control unit, storage Unit and high speed data interface;
The herringbone door rotation angle degree and water level sensor data acquisition and sending module 5 include A/D converter circuit, embedding Enter formula control unit, storage unit and high speed data interface;
The obliquity sensor 2 has one, is horizontally arranged at door body along the direction for being parallel to door body upper surface long side At upper surface;
Miter gate's angular sensor is horizontally arranged at the upper surface of door body;
The water level sensor is mounted on the lock wall at 2-3 meters of ship lock lowest water level or less;
The obliquity sensor data acquisition and sending module 4 is integrated in the embedded Control of obliquity sensor 2 itself In system, herringbone door rotation angle degree and water level sensor data acquisition and sending module 5 are integrated in the embedded Control system of itself In system, computer analysis and processing module 6 is integrated in main control computer;
The monitoring method of door body level jump real-time monitoring device under ship gateway operation state comprising the steps of:
A, mounted angle sensor 2
Miter Lock Gates door body due to operation when bear huge load, cause door body to be easy to appear structural damage, The horizontal hopping amplitude of middle door body is an important indicator of door body operating status, therefore uses 2 real-time monitoring people of obliquity sensor The horizontal hopping amplitude of word door door body monitors the current safe operation state of miter gate's door body;1 is to incline at the top of selected miter gate The installation site of angle transducer 2 installs an obliquity sensor 2 in the horizontal direction for being parallel to door body, and uses industrial glue Obliquity sensor 2 is fixed on specified position;
B, installation herringbone door rotation angle degree and water level sensor 3
Since the process of Miter Lock Gates door body appearance level jump is a dynamic process, the amplitude of level jump Change with the state of miter gate's work operation, so the folding angle and ship of wanting real-time monitoring Miter Lock Gates door body current Height of water level these running state informations in lock;Miter gate's angular sensor is parallel to miter gate's door body and is placed in people At the upper surface of word door door body, to obtain the angle of miter gate and ship lock wall and upload to computer in real time;Water level is passed Sensor is mounted on the lock wall at 2-3 meters of ship lock lowest water level or less;
C, miter gate's door body inclination data is acquired
Obliquity sensor 2 is substantially a kind of acceleration transducer with principle of inertia, and 2 gravity of obliquity sensor accelerates The angle spent between the gravity vertical axis and acceleration transducer sensitive axis in direction is inclination angle;Obliquity sensor data acquisition with Sending module 4 converts digital quantity for the collected electrical simulations amount of obliquity sensor 2 by analog to digital conversion circuit, and passes through meter Calculation obtains the inclination angle of Miter Lock Gates door body, is uploaded to computer analysis and processing module 6 finally by communication interface and is stored And it shows;The obliquity sensor 2 belongs to two-dimension tilt angle sensor, and there are two measurement directions for tool, and measurement obtains parallel respectively In the inclination angle theta of door body longitudinal directionxWith the inclination angle theta perpendicular to door body longitudinal directiony
D, the jump amount of miter gate's door body is calculated by the inclination data of miter gate's door body
The jump amount of miter gate is one of important health index of miter gate, calculates the jump of miter gate's static state by inclination value Measurer has quickly and accurately advantage, and the jump amount calculation formula for being parallel to door body longitudinal direction is as follows:
hx=r tan θx
In formula: θxTo be parallel to door body longitudinal direction inclination value, r between miter gate's door body measured point and door-hinge away from From hxFor be parallel to door body longitudinal direction miter gate jump amount;
It is as follows perpendicular to the jump amount calculation formula of door body longitudinal direction:
In formula: θy(β) is the inclination value perpendicular to door body longitudinal direction rotated when angle is β, β0End is rotated for miter gate The angle value at moment, hyFor the jump amount of the miter gate perpendicular to door body longitudinal direction;
Total jump amount calculation formula of miter gate's door body is as follows:
In formula: h is total jump amount of miter gate's door body;
By calculate separately obliquity sensor be parallel to door body longitudinal direction with perpendicular to the jump amount of door body longitudinal direction, And then total jump amount of miter gate is calculated;
E, analysis and the dynamic hop amount data of miter gate's door body are handled
The jump variable data that miter gate's door body is handled by main control computer, by herringbone door rotation angle degree and water level sensor 3 obtained water level informations and folding angle information and the jump variable information of miter gate's door body are integrated, and miter gate's jump is obtained The switch gate and the two-dimensional signal of ship lock charge and discharge water period of value, judge information one by one, obtain jumping variable data in difference Under the conditions of value range and determine inclination angle secure threshold under various operating conditions, when the maximum value of this period jump amount is big Just illustrate that this period miter gate is in misoperation position in secure threshold, when the minimum value of this period jump amount is less than safety threshold Miter gate is in normal operational position to value explanation at this time, and formula is as follows:
S indicates current safe state value in formula, is worth when being 1 and represents section miter gate at this time and be in abnormal operating condition, being worth is 0 Shi represents section miter gate at this time and is in safe operation state, hrIndicate the length value of the total jump amount of present period, htForefathers are worked as in expression The secure threshold of the jump amount of word door working condition, and the safe work state that current miter gate runs is judged with this.
The present invention is not limited to the present embodiment, any equivalent concepts within the technical scope of the present disclosure or changes Become, is classified as protection scope of the present invention.

Claims (2)

1. door body level jumps real-time monitoring device under ship gateway operation state, it is characterised in that: including obliquity sensor (2), people Word door rotation angle degree and water level sensor (3), obliquity sensor data acquisition and sending module (4), herringbone door rotation angle degree and Water level sensor data acquisition and sending module (5), computer analysis and processing module (6), the herringbone door rotation angle degree with Water level sensor (3) includes miter gate's angular sensor and water level sensor, miter gate's angular sensor Including compass or encoder;Obliquity sensor (2) and herringbone door rotation angle degree and water level sensor (3) are by the analog signal of acquisition Respectively through obliquity sensor data acquisition and sending module (4) and herringbone door rotation angle degree and water level sensor data acquisition and hair Module (5) is sent to be AD converted, data storage sends with HSSI High-Speed Serial Interface data, and passes through computer analysis and processing module (6) it receives and saves, and carry out the analysis and processing of data in computer analysis and processing module (6);
The obliquity sensor data acquisition and sending module (4) includes A/D converter circuit, embedded control unit, storage list Member and high speed data interface;
The herringbone door rotation angle degree and water level sensor data acquisition and sending module (5) include A/D converter circuit, insertion Formula control unit, storage unit and high speed data interface;
The obliquity sensor (2) has one, is horizontally arranged at the upper of door body along the direction for being parallel to door body upper surface long side At surface;
Miter gate's angular sensor is horizontally arranged at the upper surface of door body;
The water level sensor is mounted on the lock wall at 2-3 meters of ship lock lowest water level or less;
The obliquity sensor data acquisition and sending module (4) is integrated in the embedded Control of obliquity sensor (2) itself In system, herringbone door rotation angle degree and water level sensor data acquisition and sending module (5) are integrated in the embedded Control of itself In system, computer analysis and processing module (6) is integrated in main control computer.
2. the monitoring method of door body level jump real-time monitoring device under ship gateway operation state according to claim 1, It is characterized in that: comprising the steps of:
A, mounted angle sensor (2)
Miter Lock Gates door body causes door body to be easy to appear structural damage, wherein door due to bearing huge load when operation The horizontal hopping amplitude of body is an important indicator of door body operating status, therefore uses obliquity sensor (2) real-time monitoring herringbone The horizontal hopping amplitude of door door body monitors the current safe operation state of miter gate's door body;(1) is to incline at the top of selected miter gate The installation site of angle transducer (2) installs an obliquity sensor (2) in the horizontal direction for being parallel to door body, and uses industry Obliquity sensor (2) are fixed on specified position by glue;
B, installation herringbone door rotation angle degree and water level sensor (3)
Since the process of Miter Lock Gates door body appearance level jump is a dynamic process, the amplitude of level jump is also with people Word door work operation state and change, so in the folding angle and ship lock of wanting real-time monitoring Miter Lock Gates door body current Height of water level these running state informations;Miter gate's angular sensor is parallel to miter gate's door body and is placed in miter gate At the upper surface of door body, to obtain the angle of miter gate and ship lock wall and upload to computer in real time;By water level sensor It is mounted on the lock wall at 2-3 meters of ship lock lowest water level or less;
C, miter gate's door body inclination data is acquired
Obliquity sensor (2) is substantially a kind of acceleration transducer with principle of inertia, and obliquity sensor (2) gravity accelerates The angle spent between the gravity vertical axis and acceleration transducer sensitive axis in direction is inclination angle;Obliquity sensor data acquisition with Sending module (4) converts digital quantity for the collected electrical simulations amount of obliquity sensor (2) by analog to digital conversion circuit, and leads to Cross the inclination angle that Miter Lock Gates door body is calculated, finally by communication interface be uploaded to computer analysis and processing module (6) into Row is stored and is shown;The obliquity sensor (2) belongs to two-dimension tilt angle sensor, and there are two measurement directions for tool, measures respectively Obtain the inclination angle theta for being parallel to door body longitudinal directionxWith the inclination angle theta perpendicular to door body longitudinal directiony
D, the jump amount of miter gate's door body is calculated by the inclination data of miter gate's door body
The jump amount of miter gate is one of important health index of miter gate, calculates miter gate's static state by inclination value and jumps measurer There is quickly and accurately advantage, the jump amount calculation formula for being parallel to door body longitudinal direction is as follows:
hx=r tan θx
In formula: θxTo be parallel to door body longitudinal direction inclination value, r is the distance between miter gate's door body measured point and door-hinge, hxFor It is parallel to the jump amount of the miter gate of door body longitudinal direction;
It is as follows perpendicular to the jump amount calculation formula of door body longitudinal direction:
In formula: θy(β) is the inclination value perpendicular to door body longitudinal direction rotated when angle is β, β0The last moment is rotated for miter gate Angle value, hyFor the jump amount of the miter gate perpendicular to door body longitudinal direction;
Total jump amount calculation formula of miter gate's door body is as follows:
In formula: h is total jump amount of miter gate's door body;
By calculate separately obliquity sensor be parallel to door body longitudinal direction with perpendicular to the jump amount of door body longitudinal direction, in turn Total jump amount of miter gate is calculated;
E, analysis and the dynamic hop amount data of miter gate's door body are handled
The jump variable data that miter gate's door body is handled by main control computer, by herringbone door rotation angle degree and water level sensor (3) Obtained water level information and folding angle information and the jump variable information of miter gate's door body are integrated, and miter gate's hop value is obtained Switch gate and the two-dimensional signal of ship lock charge and discharge water period, information is judged one by one, obtain jump variable data in different items Value range and the secure threshold of determining inclination angle under various operating conditions under part, when the maximum value of this period jump amount is greater than Secure threshold just illustrates that this period miter gate is in misoperation position, when the minimum value of this period jump amount is less than secure threshold Illustrate that miter gate is in normal operational position at this time, formula is as follows:
S indicates current safe state value in formula, is worth when being 1 and represents section miter gate at this time and be in abnormal operating condition, is worth for 0 epoch Table this period miter gate is in safe operation state, hrIndicate the length value of the total jump amount of present period, htIndicate current miter gate The secure threshold of the jump amount of working condition, and the safe work state that current miter gate runs is judged with this.
CN201710004667.2A 2017-01-04 2017-01-04 Door body level jump real-time monitoring device and its monitoring method under ship gateway operation state Active CN106643605B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116880344A (en) * 2017-09-04 2023-10-13 长江三峡通航管理局 Closing final alignment control system for herringbone gate
CN111625903B (en) * 2020-05-27 2023-08-04 江苏物联网研究发展中心 Sedimentation deformation analysis method, device and system for ship lock cambered surface triangular gate

Citations (4)

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Publication number Priority date Publication date Assignee Title
JPS6182109A (en) * 1984-09-04 1986-04-25 Tohoku Metal Ind Ltd Magnetic azimutm device
CN102285431A (en) * 2011-04-29 2011-12-21 大连海事大学 Navigable ship draft real-time measuring device and measuring method
CN202101643U (en) * 2010-12-31 2012-01-04 中国船舶科学研究中心上海分部 Angle monitoring system based on displacement sensor
CN202925510U (en) * 2012-11-19 2013-05-08 长江三峡通航管理局 Bottom assembly damage simulation laboratory device for hydraulic miter gate

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6182109A (en) * 1984-09-04 1986-04-25 Tohoku Metal Ind Ltd Magnetic azimutm device
CN202101643U (en) * 2010-12-31 2012-01-04 中国船舶科学研究中心上海分部 Angle monitoring system based on displacement sensor
CN102285431A (en) * 2011-04-29 2011-12-21 大连海事大学 Navigable ship draft real-time measuring device and measuring method
CN202925510U (en) * 2012-11-19 2013-05-08 长江三峡通航管理局 Bottom assembly damage simulation laboratory device for hydraulic miter gate

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