CN113804169A - Measuring method - Google Patents
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- CN113804169A CN113804169A CN202111092032.5A CN202111092032A CN113804169A CN 113804169 A CN113804169 A CN 113804169A CN 202111092032 A CN202111092032 A CN 202111092032A CN 113804169 A CN113804169 A CN 113804169A
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- 238000005259 measurement Methods 0.000 claims abstract description 84
- 238000004519 manufacturing process Methods 0.000 claims abstract description 8
- 238000000691 measurement method Methods 0.000 claims description 15
- 238000010276 construction Methods 0.000 abstract description 2
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C15/00—Surveying instruments or accessories not provided for in groups G01C1/00 - G01C13/00
- G01C15/02—Means for marking measuring points
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Abstract
The application relates to the field of ship construction, in particular to a measuring method. The method for measuring key points of a ship section, wherein the ship section is provided with an original model for manufacturing reference, comprises the following steps: a first measurement step, selecting a first observation position, and measuring two observation objects and the first key point; a second measurement step, selecting a second observation position, and measuring the two observation objects and the second key point; and a comparison step, namely establishing an actual model of the ship segment according to the data of the first key point and the data of the second key point, comparing the actual model with the original model, and removing the allowance of the actual model relative to the original model. According to the measuring method, the problems that in the existing measuring mode, the target position needs to be rearranged every time when the station is switched, the trouble and the labor are wasted, and the target position is difficult to find when the arrangement between the segments is too compact are solved.
Description
Technical Field
The application relates to the field of ship construction, in particular to a measuring method.
Background
In the ship building process, the ship body section building is carried out in a workshop environment or an outdoor platform, and in the section building process, the structural precision of the ship body is ensured through the measurement operation of a total station, namely, when the total station detects the section to be measured, the measurement result is input into a computer program to build a model, and the built model is compared with a model stored in advance for the section to be measured so as to guide the subsequent operation of field personnel, for example, the section to be measured is cut off.
Specifically, in the measurement process, firstly two targets are pasted on one surface of a segment which can be observed at one angle of the segment to be measured according to requirements, then the two targets and key points on the surface are sequentially measured by selecting a proper measurement position, data are stored, then the same two targets are pasted on the other angle (for example, the other surface) of the segment to be measured according to requirements, the two targets and the key points on the other surface are also measured and stored, and finally the data stored twice are recorded into a computer program.
In this regard, in the above-mentioned measuring method, the positions of the targets need to be rearranged each time the station is changed (the measuring position is changed), which is not only troublesome and laborious, but also difficult to find when the placement between the segments is too compact.
Disclosure of Invention
The application aims to provide a measuring method, so that the problems that in the existing measuring mode, the target position needs to be rearranged every time when a station is switched, the trouble and the labor are wasted, and the target position is difficult to find when the target position is too compact to place between segments are solved.
According to the present application there is provided a method of measuring key points of a vessel segment having an existing model for reference by manufacture, comprising: a first measurement step, namely selecting a first observation position at a first measurement angle, a first key point of the ship section, which can be observed at the first measurement angle, and two observation objects outside the ship section, and measuring the two observation objects and the first key point; a second measurement step, selecting a second observation position at a second measurement angle, a second key point of the ship section, which can be observed at the second measurement angle, and the two observation objects, and measuring the two observation objects and the second key point; and a comparison step, namely establishing an actual model of the ship section according to the data of the first key point obtained in the first measurement step and the data of the second key point obtained in the second measurement step, comparing the actual model with the original model, and removing the allowance of the actual model relative to the original model.
In any of the above technical solutions, further, the measuring method includes, before the first measuring step, an installing step of: providing a plurality of targets outside of the vessel segment; in the first measurement step and the second measurement step, the two observation objects are selected as two targets of the plurality of targets.
In any of the above technical solutions, further, the installing step further includes: setting a support, setting the plurality of targets to the support, and setting a height of each of the plurality of targets to be higher than a height of a highest point of the ship section.
In any of the above technical solutions, further, the installing step further includes: the number of the supporting pieces is the same as that of the targets, and any target is correspondingly arranged on one supporting piece to number the targets.
In any of the above aspects, further, in the mounting step, the height of the target is set to be greater than or equal to 15 meters.
In any of the above technical solutions, further, the installing step further includes: the plurality of supporting members are divided into two groups, and the two groups of supporting members are respectively arranged on two sides of the ship section, which are opposite to each other.
In any of the above technical solutions, further, the installing step further includes: and a ceiling is arranged, and the plurality of supporting members are connected with the indoor ceiling where the ship section is located.
In any of the above technical solutions, further, in the first measuring step and the second measuring step: a connection line between either one of the first observation position and the second observation position and one of the two observation objects is defined as a first connection line, and a connection line between either one of the first observation position and the second observation position and the other of the two observation objects is defined as a second connection line; the first line, the second line, and any three form an angle, the degree of which is set to 45 to 125 degrees.
In any of the above technical solutions, further, in the first measuring step and in the second measuring step: the two observed objects are observed first.
In any of the above technical solutions, further, the measurement method further includes, executed after the second measurement step: and an nth measurement step, namely selecting an nth observation position under an nth measurement angle, an nth key point of the ship section, which can be observed at the nth measurement angle, and two observation objects positioned outside the ship section, and measuring the two observation objects and the nth key point, wherein the value of n is greater than 2, and n is a positive integer.
According to the measuring method, a first observation position under a first measuring angle is selected to ensure that a first key point of a ship section and two observation objects positioned outside the ship section can be observed at the first measuring angle, then the two observation objects and the first key point are measured to obtain data of the first key point, a second observation position under a second measuring angle is selected to ensure that a second key point of the ship section and the two observation objects can be observed at a second measuring angle, then the two observation objects and the second key point are measured to obtain data of the second key point, finally an actual model of the ship section is established according to the data of the first key point and the data of the second key point, and the actual model is compared with a model which is provided by an original ship section and is used for manufacturing reference, and removing the allowance of the actual model relative to the original model.
In the measuring method, two observation objects (targets) can be arranged outside a ship section according to the field measuring requirements, so that when the measuring position (transfer station) is changed to measure the two observation objects each time, the two observation objects are in the measuring range (can be measured), therefore, after the transfer station is changed each time, the positions of the two observation objects do not need to be rearranged, the measuring method is simple and convenient in the measuring process, and the problem that the positions of the observation objects are difficult to find when the section and the section are too compact in the existing measuring process is solved.
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
Fig. 1 shows a schematic diagram of an overall process of a measurement method according to an embodiment of the present application;
FIG. 2 shows a first view position schematic of a measurement method according to an embodiment of the present application;
FIG. 3 shows another schematic diagram of a first observation location of a measurement method according to an embodiment of the present application;
FIG. 4 shows a second view position schematic of a measurement method according to an embodiment of the present application;
fig. 5 shows another schematic illustration of a second observation position of a measurement method according to an embodiment of the application.
Icon: 100-ship segmentation; 200-a total station; 300-a first set of targets; 1-a first target; 2-a second target; 3-a third target; 400-a second set of targets; 4-a fourth target; 5-a fifth target; 6-a sixth target; 500-ceiling; 600-support member.
Detailed Description
The following detailed description is provided to assist the reader in obtaining a thorough understanding of the methods, devices, and/or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and/or systems described herein will be apparent to those skilled in the art in view of the disclosure of the present application. For example, the order of operations described herein is merely an example, which is not limited to the order set forth herein, but rather, variations may be made in addition to operations which must occur in a particular order, which will be apparent upon understanding the disclosure of the present application. Moreover, descriptions of features known in the art may be omitted for the sake of clarity and conciseness.
The features described herein may be embodied in different forms and should not be construed as limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many possible ways to implement the methods, devices, and/or systems described herein that will be apparent after understanding the disclosure of the present application.
Throughout the specification, when an element (such as a layer, region, or substrate) is described as being "on," "connected to," coupled to, "over," or "overlying" another element, it may be directly "on," "connected to," coupled to, "over," or "overlying" the other element, or one or more other elements may be present therebetween. In contrast, when an element is referred to as being "directly on," "directly connected to," directly coupled to, "directly over" or "directly overlying" another element, there may be no intervening elements present.
As used herein, the term "and/or" includes any one of the associated listed items and any combination of any two or more of the items.
Although terms such as "first", "second", and "third" may be used herein to describe various elements, components, regions, layers or sections, these elements, components, regions, layers or sections should not be limited by these terms. Rather, these terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first element, component, region, layer or section referred to in the examples described herein may be termed a second element, component, region, layer or section without departing from the teachings of the examples.
For ease of description, spatial relationship terms such as "above … …," "upper," "below … …," and "lower" may be used herein to describe one element's relationship to another element as illustrated in the figures. Such spatial relationship terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "upper" relative to other elements would then be oriented "below" or "lower" relative to the other elements. Thus, the term "above … …" includes both an orientation of "above … …" and "below … …" depending on the spatial orientation of the device. The device may also be otherwise oriented (e.g., rotated 90 degrees or at other orientations) and the spatially relative terms used herein should be interpreted accordingly.
The terminology used herein is for the purpose of describing various examples only and is not intended to be limiting of the disclosure. The singular forms also are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," and "having" specify the presence of stated features, quantities, operations, elements, components, and/or combinations thereof, but do not preclude the presence or addition of one or more other features, quantities, operations, components, elements, and/or combinations thereof.
Variations from the shapes of the illustrations as a result, for example, of manufacturing techniques and/or tolerances, may be expected. Thus, the examples described herein are not limited to the particular shapes shown in the drawings, but include changes in shape that occur during manufacturing.
The features of the examples described herein may be combined in various ways that will be apparent after understanding the disclosure of the present application. Further, while the examples described herein have a variety of configurations, other configurations are possible, as will be apparent after understanding the disclosure of the present application.
The application provides a measuring method, through setting up two targets outside the boats and ships segmentation to when changing the measuring position (changing the station) at every turn and measuring two targets, two targets are all in measuring range (can be surveyed promptly), therefore, change the station back at every turn, the position of two targets need not to rearrange, not only makes simple and convenient among the measurement process, and when having solved among the current measurement process too compact that sets up between segmentation and the segmentation, the problem that the position of target arrangement was difficult to be sought.
Before the present application is proposed, in the existing measurement mode, firstly two targets are pasted on one surface of a segment which can be observed at one angle of the segment to be measured according to requirements, then an appropriate measurement position is selected to sequentially measure the two targets and key points on the surface, data is stored, then the same two targets are pasted on another angle (for example, on the other surface) of the segment to be measured according to requirements, the two targets and the key points on the other surface are also measured and the data is stored, and finally the data stored twice is recorded into a computer program.
In view of this, according to the present application, there is provided a measuring method for measuring key points of a ship section, wherein the ship section is provided with an original model for reference of manufacture in advance, the measuring method of the present application comprises the following steps:
first, in a first measurement step, a first observation position at a first measurement angle, a first key point of the ship section 100, which can be observed at the first measurement angle, and two observation objects located outside the ship section 100 are selected, and the two observation objects and the first key point are measured.
Then, in the second measurement step, a second observation position at a second measurement angle, a second key point of the ship section 100 that can be observed at the second measurement angle, and two observation objects are selected, and the two observation objects and the second key point are measured.
And finally, a comparison step, namely establishing an actual model of the ship segment 100 according to the data of the first key point obtained in the first measurement step and the data of the second key point obtained in the second measurement step, comparing the actual model with the original model, and removing the allowance of the actual model relative to the original model.
The above-described measurement method will be specifically described below with reference to fig. 1 to 5.
As shown in fig. 2 and 3, in the first measurement step, a first observation position at a first measurement angle, a first key point of the ship section 100 that can be observed at the first measurement angle, and two observation objects located outside the ship section 100 are selected, and two observation objects and the first key point are measured, where the measurement mode may use a detector to measure the key point and two observation objects located outside the ship section 100, in this embodiment of the application, the detector is preferably a total station 200, and the total station 200 may display and store the position of the measured point in the form of coordinates, so as to provide effective assistance for later model comparison, and a comparison process of the models will be described in detail below.
In this step, specifically, a section to be measured (i.e., a specific part of the hull section to be trimmed) is first selected, and key points are marked on the section to be measured, and two observation objects located outside the ship section 100 are arranged, the setting positions of which will be described in detail below, outside the ship section 100. Furthermore, it should be noted here that the two observation objects may be two targets of the same design, and the key point is the point on the ship segment 100 that is simulated and tested by the field personnel according to the working principle of the total station 200.
Next, a first observation position is selected according to the field situation, the total station 200 is placed, and the measurement angle is adjusted to ensure that, at this measurement angle, the first key point and two observation objects located outside the ship section 100 can be observed (i.e. the first key point and the two observation objects located outside the ship section 100 are within the observation range of the total station 200, that is, the observation line of sight of the total station 200 is not blocked by an obstacle).
Finally, two observation objects and a first key point are measured, and measured data are stored to prepare for model comparison in the later period.
Here, the two observation objects (hereinafter, targets are taken as an example) located outside the ship segment 100 may be two of a plurality of targets arranged outside the ship segment 100, that is, a plurality of targets are arranged outside the ship segment 100, and when a site person measures a key point of the ship segment 100, two suitable targets (for example, a target which is closest to the site and most convenient to measure, and the selected target can be observed by allowing the measurement to be performed at a plurality of measurement angles to be adopted) can be selected according to site requirements.
Specifically, in an example, the support 600 may be disposed according to an on-site environment, for example, the support 600 may be disposed in a workshop environment where the ship segment is located or an outdoor platform, a plurality of targets may be disposed on the support 600 (the target may be adhered or may be provided with a specific magnetic member to be adhered to the support 600), and the height of each of the plurality of targets is set to be higher than the highest point of the ship segment 100, so that the on-site personnel can conveniently select the target to be measured, and the target is not easily blocked by the ship segment and some obstacles that may exist in the surrounding environment, where the support 600 may be a column or a rod.
It should be noted that the positions of the two targets outside the ship segment 100 of the present application are not particularly limited as long as they can be observed, that is, the observation line of sight of the observer is not blocked by an obstacle.
In the embodiment of the application, the hull segment can be further provided with a plurality of supports 600 with the same number as the targets in a workshop environment, any target is correspondingly arranged on one support 600, and a plurality of targets (for example, a first target, a second target, a third target, a fourth target, a fifth target and a sixth target) can be marked with a mark which is obvious near the target, so that the finding and the measurement of field personnel are facilitated.
The field personnel can also divide a plurality of supports 600 into two groups according to experience (for example, the first target 1, the second target 2 and the third target 3 are set as the first group of targets 300, the fourth target 4, the fifth target 5 and the sixth target 6 are set as the second group of targets 400), the two groups of supports 600 are respectively arranged at two opposite sides of the ship segment 100, and by the design, when the segments to be measured are many, the field personnel can not only quickly and conveniently select two of the plurality of targets, but also can record the number of the selected targets, so as to prevent confusion in the next measuring process. In the embodiment of the application, the height of the target can be set to be greater than or equal to 15 meters, and the position is seen from the ground, so that the space view is wide, the distance is moderate, and the station transferring operation in the measuring operation process of the total station is facilitated.
Furthermore, to ensure the safety of the measurements, a plurality of support members may also be connected to the ceiling 500 of the room in which the ship section 100 is located.
Here, it should be noted that although the two observation objects other than the ship segment 100 are exemplified by the targets, the two observation objects may be other reference objects selected by field personnel according to the field environment, for example, marks made on the support 600 (the marked points are points to be measured), and the two observation objects are not particularly limited and may be used as long as they can be used as references.
Therefore, it can be understood that, in the case where the observation objects are targets that are manually set, the above-described mounting of the two observation objects is completed before the first step (i.e., measurement).
Further, in the second measurement step, as shown in fig. 4 and 5, after the first position measurement is completed, the substation selects a second observation position at a second measurement angle, places the total station 200, adjusts the measurement angle, measures the second key point and the two observation objects, and stores the measured data to prepare for later model comparison.
It should be noted that the specific steps of the second measurement step may refer to the first step, and the specific steps of the second measurement step will not be described here.
And a comparison step, namely establishing an actual model of the ship segment 100 according to the data of the first key point obtained in the first measurement step and the data of the second key point obtained in the second measurement step, comparing the actual model with the original model, and removing the allowance of the actual model relative to the original model.
Specifically, the data measured at the first position and the second position of the total station 200 are output to the computer, the software in the computer establishes an actual model of the measured ship block 100 according to the data measured at the first position and the second position (coordinate information of each point), and then compares the actual model with the original model, and the field personnel complete subsequent operations according to the comparison result, for example, remove the residual of the actual model relative to the original model.
In addition, although there are two position measurements (i.e. one station transfer) in the measurement process of the ship section 100, when the structure of the ship section 100 is complicated (irregular pattern), multiple measurements are needed to complete model comparison, and multiple station transfers are needed, so the measurement method further includes: an nth measurement step, which is to select an nth observation position at an nth measurement angle, an nth key point of the ship section 100, which can be observed at the nth measurement angle, and two observation objects located outside the ship section 100, and measure the two observation objects and the nth key point. Where n is a positive integer and n is greater than 2, that is, the subsequent measurement steps may be performed continuously, depending on the actual conditions of the structure of the ship section 100.
Above can know, among the measuring method of this application, at every turn after the station, the position of two observation objects need not to rearrange for not only make simple and convenient among the measurement process, solved among the current measurement process moreover when setting up too compactlyly between segmentation and the segmentation, the problem that the position that the observation object arranged is difficult to look for.
In an embodiment of the present application, a connection line between either one of the first and second observation positions and one of the two observation objects is defined as a first connection line, a connection line between either one and the other of the two observation objects is defined as a second connection line, and the first connection line, the second connection line, and either one form an angle, the degree of which is set to 45 degrees to 125 degrees.
Specifically, the spatial included angle formed by the two targets and the total station 200 is 45 degrees to 125 degrees, so that the accuracy of the measured data can be effectively ensured.
The measuring method is suitable for the sections of the ship types of bulk cargo ships, oil tankers, container ships, luxury mail ships, ocean engineering ships, large ore carriers and the like.
The measurement steps of the embodiments of the present application will be described below with reference to fig. 1-5, and two measurements will be taken as an example below:
first, a plurality of supports 600 (the supports 600 may be posts and connected to the ceiling 500) are provided, and any target is correspondingly provided on one support 600, and a plurality of targets are numbered, or a mark may be made to be conspicuous near the target.
Then, a segment to be measured is selected, a key point is marked on the segment to be measured, and two suitable targets (for example, a first target and a fourth target) are selected, a first observation position is selected according to the field situation, the total station 200 is placed, the measurement angle is adjusted, two observation objects and the first key point are measured, and the measured data is stored.
And then, the station is switched, after the first position measurement is completed, the station selects a second observation position at a second measurement angle, the total station 200 is placed, the measurement angle is adjusted, the second key point, the first target and the fourth target are measured, and the measured data are stored.
Finally, the data measured at the first position and the second position of the total station 200 are output to the computer, the software in the computer establishes an actual model of the measured ship block 100 according to the data measured at the first position and the second position (coordinate information of each point), and the actual model is compared with the original model.
According to the measuring method, a first observation position under a first measuring angle is selected to ensure that a first key point of a ship section and two observation objects positioned outside the ship section can be observed at the first measuring angle, then the two observation objects and the first key point are measured to obtain data of the first key point, a second observation position under a second measuring angle is selected to ensure that a second key point of the ship section and the two observation objects can be observed at a second measuring angle, then the two observation objects and the second key point are measured to obtain data of the second key point, finally an actual model of the ship section is established according to the data of the first key point and the data of the second key point, and the actual model is compared with a model which is provided by an original ship section and is used for manufacturing reference, and removing the allowance of the actual model relative to the original model.
In the measuring method, two observation objects (targets) can be arranged outside a ship section according to the field measuring requirements, so that when the measuring position (transfer station) is changed to measure the two observation objects each time, the two observation objects are in the measuring range (can be measured), therefore, after the transfer station is changed each time, the positions of the two observation objects do not need to be rearranged, the measuring method is simple and convenient in the measuring process, and the problem that the positions of the observation objects are difficult to find when the section and the section are too compact in the existing measuring process is solved.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present application, and are used for illustrating the technical solutions of the present application, but not limiting the same, and the scope of the present application is not limited thereto, and although the present application is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope disclosed in the present application; such modifications, changes or substitutions do not depart from the spirit and scope of the exemplary embodiments of the present application, and are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. A method of measuring key points of a ship section having an existing model for manufacturing reference, comprising:
a first measurement step, namely selecting a first observation position at a first measurement angle, a first key point of the ship section, which can be observed at the first measurement angle, and two observation objects outside the ship section, and measuring the two observation objects and the first key point;
a second measurement step, selecting a second observation position at a second measurement angle, a second key point of the ship section, which can be observed at the second measurement angle, and the two observation objects, and measuring the two observation objects and the second key point;
and a comparison step, namely establishing an actual model of the ship section according to the data of the first key point obtained in the first measurement step and the data of the second key point obtained in the second measurement step, comparing the actual model with the original model, and removing the allowance of the actual model relative to the original model.
2. The measuring method according to claim 1,
the measuring method comprises a mounting step, which is located before the first measuring step: providing a plurality of targets outside of the vessel segment;
in the first measurement step and the second measurement step, the two observation objects are selected as two targets of the plurality of targets.
3. The measurement method of claim 2, wherein the mounting step further comprises:
setting a support, setting the plurality of targets to the support, and setting a height of each of the plurality of targets to be higher than a height of a highest point of the ship section.
4. The measurement method of claim 3, wherein the mounting step further comprises:
the number of the supporting pieces is the same as that of the targets, and any target is correspondingly arranged on one supporting piece to number the targets.
5. The measuring method according to claim 3, wherein in the mounting step, the height of the target is set to be greater than or equal to 15 meters.
6. The measurement method of claim 4, wherein the mounting step further comprises:
the plurality of supporting members are divided into two groups, and the two groups of supporting members are respectively arranged on two sides of the ship section, which are opposite to each other.
7. The measurement method of claim 4, wherein the mounting step further comprises:
and a ceiling is arranged, and the plurality of supporting pieces are connected with the indoor ceiling where the ship section is located.
8. The measurement method according to any one of claims 1 to 7, characterized in that, in the first measurement step and in the second measurement step:
a connection line between either one of the first observation position and the second observation position and one of the two observation objects is defined as a first connection line, and a connection line between either one of the first observation position and the second observation position and the other of the two observation objects is defined as a second connection line;
the first line, the second line, and any three form an angle, the degree of which is set to 45 to 125 degrees.
9. The measurement method according to any one of claims 1 to 7, characterized in that, in the first measurement step and in the second measurement step: the two observed objects are observed first.
10. The measurement method according to any one of claims 1 to 7, characterized in that it further comprises, performed after the second measurement step:
and an nth measurement step, namely selecting an nth observation position under an nth measurement angle, an nth key point of the ship section, which can be observed at the nth measurement angle, and two observation objects positioned outside the ship section, and measuring the two observation objects and the nth key point, wherein the value of n is greater than 2, and n is a positive integer.
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2021
- 2021-09-17 CN CN202111092032.5A patent/CN113804169A/en active Pending
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| CN103697871A (en) * | 2013-12-26 | 2014-04-02 | 沪东中华造船(集团)有限公司 | Method for realizing automatic lofting detection by applying total station |
| CN107499454A (en) * | 2017-08-28 | 2017-12-22 | 上海外高桥造船有限公司 | A kind of control method of the ship body segment carrying precision based on OTS |
| CN112249262A (en) * | 2020-10-28 | 2021-01-22 | 上海外高桥造船有限公司 | Quick positioning method for ship anchor platform |
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