CN115628708A - Method for measuring length of ship body on inclined ship platform - Google Patents
Method for measuring length of ship body on inclined ship platform Download PDFInfo
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- CN115628708A CN115628708A CN202211377993.5A CN202211377993A CN115628708A CN 115628708 A CN115628708 A CN 115628708A CN 202211377993 A CN202211377993 A CN 202211377993A CN 115628708 A CN115628708 A CN 115628708A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B73/00—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms
- B63B73/60—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms characterised by the use of specific tools or equipment; characterised by automation, e.g. use of robots
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention discloses a method for measuring the length of a ship body on an inclined slipway, which comprises the steps of marking a slipway straight cut line on the slipway, erecting a stern target, a bow target and a middle target on the slipway straight cut line, arranging reflectors on the bow part and the stern target of the ship body, and measuring the length of the stern part and the bow part by using a total station so as to obtain the length of the ship body. The method of the invention measures the length of the ship body by marking the straight ship berth cutting line and erecting the stern target, the bow target and the middle target on the straight ship berth cutting line, thereby avoiding the error influence of the ship building period and seasonal temperature on the measurement of the length of the ship body and improving the precision of the measurement of the length of the ship body.
Description
Technical Field
The invention belongs to the technical field of ship construction, and particularly relates to a method for measuring the length of a ship body on an inclined slipway.
Background
With the propulsion of modern shipbuilding modes, shipbuilding efficiency is continuously improved, and shipbuilding is becoming large. The influence of temperature difference on the length direction of the shipway by the shipway lattice line serving as a basis for carrying, positioning and measuring in sections in the ship construction is increased.
The traditional method for measuring the length of the ship body of the inclined slipway is characterized in that before a ship is hoisted on the slipway in a subsection mode and carried, grid lines used during ship construction are marked on the slipway, and fore and aft end point position lines of a ship body marked by the grid lines are used as datum lines for measuring the length of the ship; after the ship body is built, respectively measuring the relative position difference of the fore-and-aft end points of the ship body relative to the fore-and-aft end points of the slipway marked by the slipway grid line by using a total station, and calculating to obtain the length of the ship body; in practical operation, the slipway is used as a large reinforced concrete structure and is affected by thermal expansion and cold contraction, and particularly along the length direction of the slipway, the time difference of months generally exists between the check line of the slipway and the length measurement of the ship body; the fore and aft end points of the lattice line of the ship berth are influenced by the carrying construction period of the ship berth subsection and seasonal temperature change, the length between the fore and aft end points of the lattice line can change to a certain extent, so that the error of ship length measurement is increased, and the precision of the ship length measurement is reduced.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a method for measuring the length of a ship body on an inclined slipway.
In order to achieve the purpose of the invention, the invention provides the following technical scheme:
a method for measuring the length of a hull at an inclined berth, comprising the steps of:
step one, marking a center line of a slipway on an inclined slipway by using a total station, wherein the center line of the slipway is superposed with a longitudinal section in a ship body;
secondly, after the marking of the center line of the slipway is finished, a total station is used for marking a straight cutting line of the slipway on the inclined slipway;
thirdly, after the straight sectioning line of the slipway is scribed, respectively erecting a stern target and a bow target on the straight sectioning line of the slipway, and adjusting the target center of the stern target and the target center of the bow target by using a total station so that the inclination angles of the target center lines of the stern target and the bow target are the same as the inclination angle of the slipway;
fourthly, after the fore target and the stern target are erected, erecting an intermediate target on a straight sectioning line of a shipway between the fore target and the stern target, and adjusting an intermediate target center through a total station to enable the intermediate target center to be in the same straight line with the target center of the stern target and the target center of the fore target;
fifthly, after the stern target, the bow target and the middle target are erected, arranging a stern reflector at the stern part of the ship body, arranging a bow reflector at the bow part of the ship body, measuring the length of the stern part by using a total station according to the positions of the stern target, the middle target and the stern reflector, and measuring the length of the bow part by using the total station according to the positions of the bow target, the middle target and the bow reflector;
and sixthly, adding the measured bow ship length and stern ship length to obtain the length of the ship body, and measuring the length of the ship body.
The longitudinal section of the hull in the first step is a midship section along the length direction of the hull.
The straight cutting line of the slipway in the second step is parallel to the centerline of the slipway, and the distance between the straight cutting line of the slipway and the centerline of the slipway is greater than the half width of the ship body.
The third step of erecting the stern target and the bow target comprises the following specific steps: erecting a stern target on a straight ship body section line where a stern part of a ship body is located, erecting a first total station outside the straight ship body section line where the stern part of the ship body is located, taking the straight ship body section line as a reference line, and measuring and adjusting a target center of the stern target by using the first total station to enable the target center of the stern target to be superposed with a vertical plane where the straight ship body section line is located, so that the erection of the stern target is completed; erecting a bow target on a straight ship body sectioning line where a ship body bow is located, erecting a second total station outside the straight ship body sectioning line where the ship body bow is located, taking the straight ship body sectioning line as a reference line, and measuring and adjusting the target center of the bow target by using the second total station to enable the target center of the bow target to be superposed with a vertical plane where the straight ship body sectioning line is located, so that the erection of the bow target is completed; and simultaneously, measuring and adjusting the target center of the stern target by using a first total station so that the inclination angle of the target center line where the target center of the stern target and the target center of the bow target are located is the same as the inclination angle of the ship berth.
The fourth step of the intermediate target erection specifically comprises the following steps: after the stern target and the bow target are erected, an intermediate target is erected on a straight section line of the ship body where the middle part of the ship body is located, a target center of the intermediate target is measured and adjusted by using a first total station, the target center of the intermediate target is made to coincide with the target center line, and the stern target, the bow target and the intermediate target are on the same straight line.
The fifth step of measuring the stern captain and the bow captain specifically comprises the following steps: erecting a first total station outside a straight section line of a ship body where a stern part of the ship body is located, wherein the position of the first total station can be used for measuring a stern reflector, a stern target and an intermediate target, measuring a target center of the intermediate target and a target center line where the target center of the stern target is located by using the first total station, taking the target center line as a reference line and taking the target center of the intermediate target as a reference point by using the first total station to measure the stern reflector to obtain the projection distance of the stern reflector and the intermediate target on the target center line, and thus obtaining the length of the stern part; and erecting a second total station outside a straight sectioning line of the ship body where the bow part of the ship body is located, wherein the position of the second total station can measure a bow reflector, a bow target and a middle target, measuring a target center of the middle target and a target center line where the target center of the bow target is located by using the second total station, and measuring the bow reflector by using the target center line as a reference line and the target center of the middle target as a datum point to obtain the projection distance of the bow reflector and the middle target on the target center line so as to obtain the length of the bow part.
When the stern captain and the bow captain are measured, the first total station and the second total station are used for measuring the stern captain and the bow captain respectively and simultaneously.
Based on the technical scheme, the method for measuring the length of the ship body on the inclined ship platform obtains the following technical advantages through practical application:
1. the method for measuring the length of the ship body on the inclined slipway, disclosed by the invention, measures the length of the ship body by marking the straight sectioning line of the slipway and erecting the stern target, the bow target and the middle target on the straight sectioning line of the slipway, thereby avoiding the error influence of the ship construction period and seasonal temperature on the measurement of the length of the ship body and improving the precision of the measurement of the length of the ship body.
2. Compared with the prior art, the method for measuring the length of the ship body on the inclined slipway can measure the length of the ship body in different temperature differences and different seasons, and provides accurate data for the deformation condition of the length of each ship type ship body influenced by temperature difference illumination.
Drawings
Fig. 1 is a view showing a structure of a hull length measurement used in a method for measuring a length of a hull at an inclined berth according to the present invention.
Detailed Description
In order that the objects, aspects and advantages of the invention will become more apparent, the invention will now be described by way of example only, as illustrated in the accompanying drawings. It is to be understood that such description is merely illustrative and not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
As shown in fig. 1, the present invention pertains to a method for measuring the length of a hull at an inclined berth, which specifically comprises the following steps:
firstly, drawing a slipway center line 6 on an inclined slipway 11 by using a total station, wherein the slipway center line 6 is superposed with a longitudinal section in a ship body;
secondly, after the building of the center line 6 of the slipway is finished, a total station is used for building a straight building line 10 of the slipway on an inclined slipway 11;
thirdly, after the straight slipway line 10 is marked, respectively erecting a stern target 7 and a bow target 9 on the straight slipway line 10, and adjusting the target center of the stern target 7 and the target center of the bow target 9 by using a total station so that the inclination angle of the target line where the target center of the stern target 7 and the target center of the bow target 9 are located is the same as the inclination angle of the slipway;
fourthly, after the fore target 9 and the stern target 7 are erected, erecting an intermediate target 8 on a straight ship berth sectioning line 10 between the fore target 9 and the stern target 7, and adjusting the target center of the intermediate target 8 through a total station to enable the target center of the intermediate target 8 to be on the same straight line with the target center of the stern target 7 and the target center of the fore target 9;
fifthly, after the stern target 7, the bow target 9 and the middle target 8 are erected, arranging a stern reflector 1 at the stern part of the ship body, arranging a bow reflector 2 at the bow part of the ship body, measuring the stern length 51 by using a total station according to the positions of the stern target 7, the middle target 8 and the stern reflector 1, and measuring the bow length 52 by using the total station according to the positions of the bow target 9, the middle target 8 and the bow reflector 2;
and sixthly, adding the measured bow length 52 and stern length 51 to obtain the length of the ship body, and measuring the length of the ship body.
The longitudinal section of the hull in the first step is a midship section along the length direction of the hull.
The straight slipway cross-section line 10 in the second step is parallel to the slipway center line 6, and the distance between the slipway cross-section line 10 and the slipway center line 6 is greater than the half width of the hull.
The third step of erecting the stern target 7 and the bow target 9 comprises the following specific steps: erecting a stern target 7 on a straight ship body section line where a ship body stern part is located, erecting a first total station 12 outside the straight ship body section line where the ship body stern part is located, taking the straight ship body section line as a reference line, and measuring and adjusting a target center of the stern target 7 by using the first total station 12 to enable the target center of the stern target 7 to be superposed with a vertical plane where the straight ship body section line is located, so that erection of the stern target 7 is completed; erecting a bow target 9 on a straight ship body sectioning line where a ship body bow is located, erecting a second total station 13 outside the straight ship body sectioning line where the ship body bow is located, taking the straight ship body sectioning line as a reference line, and measuring and adjusting the target center of the bow target 9 by using the second total station 13 to enable the target center of the bow target 9 to be superposed with a vertical plane where the straight ship body sectioning line is located, so that the erection of the bow target 9 is completed; and simultaneously, measuring and adjusting the target center of the stern target 7 by using the first total station 12, so that the inclination angle of a target line where the target center of the stern target 7 and the target center of the bow target 9 are located is the same as the inclination angle of the ship berth.
The specific steps of erecting the intermediate target 8 in the fourth step are as follows: after the stern target 7 and the bow target 9 are erected, an intermediate target 8 is erected on a straight sectioning line of the ship body where the middle part of the ship body is located, the target center of the intermediate target 8 is measured and adjusted by using a first total station 12, the target center of the intermediate target 8 is overlapped with the target center line, and the stern target 7, the bow target 9 and the intermediate target 8 are on the same straight line.
The specific steps of measuring the stern captain 51 and the bow captain 52 in the fifth step are as follows: erecting a first total station 12 outside a straight section line of a ship body where a stern part of the ship body is located, wherein the position of the first total station 12 can be used for measuring a stern reflector 1, a stern target 7 and a middle target 8, measuring a target center of the middle target 8 and a target center line where a target center of the stern target 7 is located by using the first total station 12, and measuring the projection distance of the stern reflector 1 and the middle target 8 on the target center line by using a target center line as a reference line and using the target center of the middle target 8 as a datum point by using the first total station 12, so as to obtain a stern length 51; erecting a second total station 13 outside a straight sectioning line of the ship body where the bow part of the ship body is located, wherein the position of the second total station 13 can measure a bow reflector 2, a bow target 9 and a middle target 8, measuring a target line where a target center of the middle target 8 and a target center of the bow target 9 are located by using the second total station 13, taking the target line as a reference line and the target center of the middle target 8 as a datum point by using the second total station 13, and measuring the bow reflector 2 to obtain the projection distance of the bow reflector 2 and the middle target on the target line so as to obtain the bow ship length 52; the straight ship berth cutting line 10 is marked on the ship berth, and the stern target 7, the bow target 9 and the middle target 8 are erected on the straight ship berth cutting line 10 to measure the length of the ship body, so that the error influence of the ship building period and seasonal temperature on the measurement of the length of the ship body is avoided, and the precision of the measurement of the length of the ship body is improved.
When the stern captain 51 and the bow captain 52 are measured, the first total station 12 and the second total station 13 respectively measure the stern captain 51 and the bow captain 52 at the same time.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that; modifications of the specific embodiments of the invention or equivalent substitutions for parts of the technical features are possible; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.
Claims (7)
1. A method for measuring the length of a hull at an inclined berth, characterized in that it comprises in particular the following steps:
firstly, a total station is used for drawing a slipway central line (6) on an inclined slipway (11), wherein the slipway central line (6) is superposed with a longitudinal section in a ship body;
secondly, after the center line (6) of the slipway is scribed, scribing a slipway straight cutting line (10) on an inclined slipway (11) by using a total station;
thirdly, after the straight slipway line (10) is marked, respectively erecting a stern target (7) and a bow target (9) on the straight slipway line (10), and adjusting the target center of the stern target (7) and the target center of the bow target (9) by using a total station to ensure that the inclination angles of target lines where the target center of the stern target (7) and the target center of the bow target (9) are positioned are the same as the inclination angle of the slipway;
fourthly, after erecting the bow target (9) and the stern target (7), erecting a middle target (8) on a straight sectioning line (10) of a slipway between the bow target (9) and the stern target (7), and adjusting the target center of the middle target (8) through a total station to enable the target center of the middle target (8), the target center of the stern target (7) and the target center of the bow target (9) to be on the same straight line;
fifthly, after the stern target (7), the bow target (9) and the middle target (8) are erected, arranging a stern reflector (1) at the stern of the ship body, arranging a bow reflector (2) at the bow of the ship body, measuring the stern length (51) by using a total station according to the positions of the stern target (7), the middle target (8) and the stern reflector (1), and measuring the bow length (52) by using the total station according to the positions of the bow target (9), the middle target (8) and the bow reflector (2);
and sixthly, adding the measured bow captain (52) and stern captain (51) to obtain the length of the ship body, and finishing the measurement of the length of the ship body.
2. A method for measuring the length of a hull at an inclined berth according to claim 1, characterized in that the hull in the first step has a midship section in the direction of the hull length.
3. A method for measuring the length of a hull at an inclined slipway according to claim 1, characterized in that the straight slipway cut line (10) in the second step is parallel to the slipway centre line (6), the distance between the straight slipway cut line (10) and the slipway centre line (6) being larger than the half width of the hull.
4. A method for measuring the length of the hull at an inclined slipway according to claim 1, characterized in that the specific steps of erecting the stern target (7) and the bow target (9) in the third step are: erecting a stern target (7) on a straight ship body sectioning line where a ship body stern part is located, erecting a first total station (12) outside the straight ship body sectioning line where the ship body stern part is located, taking the straight ship body sectioning line as a reference line, and measuring and adjusting a target center of the stern target (7) by using the first total station (12), so that the target center of the stern target (7) is overlapped with a vertical plane where the straight ship body sectioning line is located, and the erection of the stern target (7) is completed; erecting a bow target (9) on a straight ship body cutting line where the bow part of the ship body is located, erecting a second total station (13) outside the straight ship body cutting line where the bow part of the ship body is located, taking the straight ship body cutting line as a reference line, measuring and adjusting the target center of the bow target (9) by using the second total station (13), and enabling the target center of the bow target (9) to be superposed with a vertical plane where the straight ship body cutting line is located to complete the erection of the bow target (9); and simultaneously, measuring and adjusting the target center of the stern target (7) by using a first total station (12), so that the inclination angle of a target line where the target center of the stern target (7) and the target center of the bow target (9) are located is the same as the inclination angle of the slipway.
5. A method for measuring the length of a hull at an inclined berth according to claim 1, characterized by the specific steps of intermediate target (8) erection in the fourth step: after the stern target (7) and the bow target (9) are erected, erecting a middle target (8) on a straight sectioning line of the ship body at the middle part of the ship body, measuring and adjusting the target center of the middle target (8) by using a first total station (12), enabling the target center of the middle target (8) to coincide with the target center line, wherein the stern target (7), the bow target (9) and the middle target (8) are on the same straight line.
6. A method for measuring the length of the hull at an inclined slipway according to claim 1, characterized in that the specific steps of stern (51) and bow (52) measurements in the fifth step are: erecting a first total station (12) outside a straight section line of a ship body where a stern part of the ship body is located, wherein the position of the first total station (12) can measure a stern reflector (1), a stern target (7) and an intermediate target (8), measuring a target center of the intermediate target (8) and a target center line where the target center of the stern target (7) is located by using the first total station (12), and measuring the stern reflector by using the target center line as a reference line and the target center of the intermediate target (8) as a reference point by using the first total station (12) to obtain the projection distance of the stern reflector (1) and the intermediate target (8) on the target center line so as to obtain the ship length (51) of the stern part; and erecting a second total station (13) outside a straight sectioning line of the ship body where the bow part of the ship body is located, wherein the position of the second total station (13) can measure a bow reflector (2), a bow target (9) and an intermediate target (8), measuring a target center of the intermediate target (8) and a target center line where the target center of the bow target (9) is located by using the second total station (13), and measuring the bow reflector (2) by using the target center line as a reference line and the target center of the intermediate target (8) as a reference point to obtain the projection distance of the bow reflector (2) and the intermediate target on the target center line so as to obtain the bow ship length (52).
7. Method for measuring hull length at an inclined berth according to claim 6, characterized in that, at the time of the measurement of stern (51) and bow (52) captain, the first total station (12) and the second total station (13) take the measurement of stern (51) and bow captain (52) simultaneously, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211377993.5A CN115628708A (en) | 2022-11-04 | 2022-11-04 | Method for measuring length of ship body on inclined ship platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211377993.5A CN115628708A (en) | 2022-11-04 | 2022-11-04 | Method for measuring length of ship body on inclined ship platform |
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| Publication Number | Publication Date |
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| CN115628708A true CN115628708A (en) | 2023-01-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211377993.5A Pending CN115628708A (en) | 2022-11-04 | 2022-11-04 | Method for measuring length of ship body on inclined ship platform |
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| CN (1) | CN115628708A (en) |
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- 2022-11-04 CN CN202211377993.5A patent/CN115628708A/en active Pending
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