CN114313145A - Installation detection method for large base on arc-shaped deck - Google Patents
Installation detection method for large base on arc-shaped deck Download PDFInfo
- Publication number
- CN114313145A CN114313145A CN202210030863.8A CN202210030863A CN114313145A CN 114313145 A CN114313145 A CN 114313145A CN 202210030863 A CN202210030863 A CN 202210030863A CN 114313145 A CN114313145 A CN 114313145A
- Authority
- CN
- China
- Prior art keywords
- laser
- base
- installation
- arc
- laser level
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000009434 installation Methods 0.000 title claims abstract description 54
- 238000001514 detection method Methods 0.000 title claims abstract description 29
- 238000005259 measurement Methods 0.000 claims abstract description 17
- 238000007689 inspection Methods 0.000 claims abstract description 12
- 238000003466 welding Methods 0.000 claims abstract description 9
- 238000005520 cutting process Methods 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 7
- 241001290864 Schoenoplectus Species 0.000 claims description 6
- 238000013461 design Methods 0.000 claims description 4
- 230000000630 rising effect Effects 0.000 claims description 2
- 238000010276 construction Methods 0.000 description 4
- 239000004568 cement Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000012031 short term test Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
Abstract
The invention provides an installation detection method of a large base on an arc-shaped deck, which utilizes a laser level meter as an installation height reference and a levelness inspection reference of the base. When the base is installed, the prefabricated base is firstly placed at the appointed position of the arc-shaped deck, then the emergent laser of the laser level meter is adjusted to be at the preset installation height, the emergent laser is used as a reference to measure and cut off the supporting legs to form a finished base, and finally the welding is carried out to complete the installation. According to the installation detection method, the prefabricated base is directly placed at the designated position for measurement, so that the measurement and the removal are more suitable for the actual working condition, and meanwhile, the laser level meter is used as the installation standard of all the bases, so that the deviation among the bases is avoided. The characteristics of long distance measurement and high precision of the laser level meter are utilized, the installation detection speed is greatly improved, the installation inspection reporting efficiency is greatly improved, the dock period is shortened, and the laser level meter has higher practical value.
Description
Technical Field
The invention relates to the technical field of ship manufacturing, in particular to an installation detection method of a large base on an arc-shaped deck.
Background
The levelness of a large ship base during installation is always a concern of site constructors in the ship industry, the levelness of the large ship base must be guaranteed within a height drop range of 6mm according to the requirements of a ship installation process, the levelness of the large ship base installed on an arc deck needs to be guaranteed, and the large ship base needs to be assembled, so that the site constructors are difficult to assemble. At present, generally adopt the level gauge to carry out the test of levelness with supplementary installation, the level gauge is the bar form usually, and length is no longer than 1 meter, needs one section multiple measurement during the mounting base, and the polylith base is assembled the back and is hardly reached the requirement that the height drop is less than 6mm, even can reach the requirement, also must spend a lot of time of doing over again, also will spend a large amount of time energy to the eastern newspaper of later stage simultaneously and examine the detection.
Therefore how to with the large-scale base horizontal installation of boats and ships at arc deck face and can the short-term test levelness, guarantee in the within range of height drop 6mm to improve the efficiency of construction, shorten the report of later stage and examine the check-out time, guarantee the high accuracy that disposable passes through simultaneously and detect, further shorten dock cycle, be the technical problem that needs to solve at present.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, the present invention provides an installation detection method for a large base on a curved deck, comprising the steps of:
s1: providing a plurality of prefabricated bases, and putting the prefabricated bases to the appointed positions of the arc-shaped deck according to a design drawing, wherein each prefabricated base comprises a supporting plate and a supporting leg which are vertically connected;
s2: placing a laser level meter on a central line of the arc-shaped deck, wherein the central line is positioned at the highest position of the arc-shaped deck, so that emergent laser of the laser level meter is horizontally projected onto supporting legs of the prefabricated base, and adjusting the height of the emergent laser of the laser level meter to enable the emergent laser to be at a preset installation height, wherein the preset installation height is the position of the upper surface of a rear supporting plate after installation is finished;
s3: keeping a support plate of the prefabricated base horizontal, determining intersection points of the emergent laser and each support leg, measuring vertical distances between the intersection points and an arc deck, recording the vertical distances as cutting reserved values, taking the upper surface of the support plate of the prefabricated base as a reference, vertically measuring the cutting reserved values downwards, and marking points on the support legs;
s4: cutting off the lower parts of the supporting legs of the prefabricated base from the marking points to form a finished base;
s5: and putting the finished product base to a designated position again for welding.
Optionally, the predetermined installation height of the outgoing laser in step S2 is a height position with a vertical distance of 70mm from the center line.
Optionally, in step S3, determining the cutting reserve value and the mark point by using a proportional three-edged ruler, specifically:
during measurement, the proportional triangular scale is tightly attached to the supporting legs, the vertical distance between the intersection point and the arc-shaped deck is measured along the vertical direction, then the proportional triangular scale is tightly attached to the supporting legs by taking the upper surface of the prefabricated base as a reference, the cutting reserved value is vertically measured downwards, and mark points are made on the supporting legs.
Optionally, in step S3, when the supporting foot cannot be projected by the outgoing laser of the laser level, the laser level is shifted along the center line of the arc-shaped deck to change the irradiation range of the outgoing laser.
Optionally, in step S5, before or after welding, a step of checking is further included, specifically:
and (3) rising or lowering the emergent laser of the laser level meter to ensure that the height of the emergent laser does not coincide with the upper surface of the finished product base, then measuring the vertical distance between the upper surface of the supporting plate and the emergent laser at the position of each supporting leg, recording the vertical distance as a detection value, then comparing the size of each detection value, and when the numerical difference of each detection value is within 6mm, conforming to the installation requirement.
Optionally, the check value is obtained by measuring with a proportional three-square ruler, specifically:
and raising the emergent laser of the laser level meter, vertically placing the proportional triangular scale on the supporting plate at the position of each supporting leg, and measuring the vertical distance between the surface of the supporting plate and the emergent laser to obtain the inspection value.
Optionally, when the emitted laser of the laser level is raised, the distance between the emitted laser and the upper surface of the support plate is 20 mm.
Optionally, the laser level is an infrared laser level.
As described above, the present invention provides a method for mounting and inspecting a large base on an arc-shaped deck, in which a laser level is used as a base mounting height reference and a levelness inspection reference. When the base is installed, the prefabricated base is firstly placed at the appointed position of the arc-shaped deck, then the emergent laser of the laser level meter is adjusted to be at the preset installation height, the emergent laser is used as a reference to measure and cut off the supporting legs to form a finished base, and finally the welding is carried out to complete the installation. According to the installation detection method, the prefabricated base is directly placed at the designated position for measurement, so that the measurement and the removal are more suitable for the actual working condition, and meanwhile, the laser level meter is used as the installation standard of all the bases, so that the deviation among the bases is avoided. The remote distance measurement and high precision characteristics of the laser level meter are utilized to greatly improve the installation detection speed, thereby greatly improving the installation check reporting efficiency and shortening the dock period. Meanwhile, the method can be widely applied to the field of ship construction such as high and new ships, official ships and the like, and has higher practical value.
Drawings
Fig. 1 shows a schematic view of the structure of a prefabricated base according to the invention.
Fig. 2 shows a schematic top view of the placement of the prefabricated base of the present invention.
Fig. 3 is a side view of the placement of the prefabricated base of the present invention.
Figure 4 is a schematic representation of the determination of cut retention using a proportional three-square ruler.
Fig. 5 is a schematic diagram showing the determination of the marking points using a proportional three-square ruler.
Fig. 6 shows a schematic side view of the placement of the finished susceptor.
FIG. 7 is a schematic illustration of raising a laser level to perform a levelness check.
Fig. 8 is a schematic diagram showing the determination of the check value using a proportional three-square scale.
Fig. 9-10 show schematic views of shifting the laser level.
Description of the element reference numerals
1 laser level meter
2 proportion three-square ruler
4 emitting laser
5 Room coaming
6 arc deck
7 center line
31 prefabricated base
32 finished product base
301 supporting plate
302 support foot
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
As in the detailed description of the embodiments of the present invention, the cross-sectional views illustrating the device structures are not partially enlarged in general scale for convenience of illustration, and the schematic views are only examples, which should not limit the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in the actual fabrication.
For convenience in description, spatial relational terms such as "below," "beneath," "below," "under," "over," "upper," and the like may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that these terms of spatial relationship are intended to encompass other orientations of the device in use or operation in addition to the orientation depicted in the figures. Further, when a layer is referred to as being "between" two layers, it can be the only layer between the two layers, or one or more intervening layers may also be present. As used herein, "between … …" is meant to include both endpoints.
In the context of this application, a structure described as having a first feature "on" a second feature may include embodiments in which the first and second features are formed in direct contact, and may also include embodiments in which additional features are formed in between the first and second features, such that the first and second features may not be in direct contact.
It should be noted that the drawings provided in the present embodiment are only for illustrating the basic idea of the present invention, and the drawings only show the components related to the present invention rather than being drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of each component in actual implementation may be changed freely, and the layout of the components may be more complicated.
For the installation of a large base on a plane deck, the height of the supporting feet of the base is usually directly given according to design drawings, the height of the supporting feet of all the bases is consistent, and the height error during the installation can be controlled within the range of 6 mm. However, large-scale base of installation on deck that has the radian, then face more difficulty, because the deck is the cambered surface, and base quantity is a plurality of, if the surface level of base will be guaranteed, then each supporting legs height of base must be incomplete unanimous, and general level bar physical length is limited, generally not more than 1 meter, can only measure each base one by one, owing to lack unified benchmark, when the supporting legs intercepting, the deviation appears very easily, the condition of height unevenness often can appear in each base, hardly reach the requirement that height error is less than 6mm, also can spend more time simultaneously, influence construction cycle.
As shown in fig. 1, the present invention provides an installation detection method for a large base on an arc-shaped deck, which includes the following steps:
s1: providing a plurality of prefabricated bases 31, and putting the prefabricated bases 31 to the designated positions of the arc-shaped deck 6 according to a design drawing, wherein the prefabricated bases 31 comprise supporting plates 301 and supporting legs 302 which are vertically connected, as shown in fig. 1 and 2;
s2: placing the laser level 1 on a center line 7 of the arc-shaped deck 6, wherein the center line 7 is located at the highest position of the arc-shaped deck 6, so that the emergent laser of the laser level 1 is horizontally projected onto the supporting legs 302 of the prefabricated base 31, and adjusting the height of the emergent laser 4 of the laser level 1, so that the emergent laser 4 is located at a preset installation height, wherein the preset installation height is the position of the upper surface of the supporting plate 301 after installation is completed, as shown in fig. 3;
specifically, since the laser beam emitted from the laser level 1 is in a horizontal state, the emitted laser beam 4 is a reference for ensuring the levelness of the base, and the predetermined installation height of the emitted laser beam 4 in step S2 is a height position which is vertically 70mm away from the center line 7, since cement needs to be laid on the arc-shaped deck 6 after the base is installed, it is usually required to ensure that the height difference between the cement plane and the base surface is 10-20mm after the cement is laid. The laser level 1 is an infrared laser level.
S3: keeping the supporting plate 301 of the prefabricated base 31 horizontal, determining intersection points of the emergent laser 4 and each supporting leg 302, measuring vertical distances between the intersection points and the arc-shaped deck 6, recording the vertical distances as cutting reserved values, taking the upper surface of the supporting plate 301 of the prefabricated base 31 as a reference, vertically measuring the cutting reserved values downwards, and making marking points on the supporting legs 302, as shown in fig. 3-5;
specifically, the cutting reserved value and the marking point are determined by using the proportional triangular scale 2, during measurement, the proportional triangular scale 2 is tightly attached to the supporting leg 302, the vertical distance between the intersection point and the arc-shaped deck 6 (namely the cutting reserved value, which corresponds to d1, d2, d3 and d4 in the drawing) is measured along the vertical direction, then the proportional triangular scale 2 is tightly attached to the supporting leg 302 by taking the upper surface of the prefabricated base 31 as a reference, the cutting reserved value is vertically measured downwards, and the marking point is made on the supporting leg 302.
S4: cutting off the lower parts of the supporting feet 301 of the prefabricated base 31 from the marked points to form a finished base 32;
specifically, since the height of the emergent laser beam 4 is the upper surface position of the finished product base 32 after installation is completed, the vertical distance between the intersection point of the emergent laser beam 4 and the supporting leg 302 and the arc-shaped deck 6 is the height of the supporting leg 302 of the finished product base 32, and therefore, the vertical distance between the intersection point and the arc-shaped deck 6 (i.e., the cutting retention value) is measured first, then the vertical distance is measured downwards from the upper surface of the prefabricated base 31, unnecessary parts are cut off, and the supporting leg of the finished product base 32 is ensured to obtain an accurate height value finally, so that the levelness of base installation is ensured. The prefabricated base 31 is directly placed at a designated position for measurement, and cutting is not measured according to a drawing, so that the measurement and cutting are more suitable for actual working conditions.
S5: the finished base 32 is replaced to the desired position for welding, as shown in fig. 6.
Further, in step S3, when the supporting legs cannot be projected by the outgoing laser 4 of the laser level 1, the laser level 1 is shifted along the center line 7 of the arc-shaped deck 6, because in the case of a large number of bases, it is difficult for the laser level 1 to project all the supporting legs without moving the position, and therefore, it is necessary to shift the position of the laser level 1 along the center line 7 in time to change the irradiation range of the outgoing laser 4, as shown in fig. 9 and 10.
Further, in step S5, before or after welding, a step of checking is further included, as shown in fig. 7 and 8, specifically: the method comprises the steps of lifting or lowering the emergent laser 4 of the laser level meter 1 to enable the height of the emergent laser 4 not to coincide with the upper surface of the finished product base 32, then measuring the vertical distance between the upper surface of the supporting plate 301 and the emergent laser 4 at the position of each supporting leg 302, recording the vertical distance as a detection value, then comparing the size of each detection value, and when the numerical difference of each detection value is within 6mm, meeting the installation requirement.
Specifically, the step of inspecting may also be accomplished by the proportional triangular scale 2. Preferably, the emitted laser light 4 of the laser level 1 is raised so that the distance between the emitted laser light 4 and the upper surface of the finished base 32 is 20mm, for easy observation and measurement. Then, the proportional triangular scale 2 is vertically placed on the supporting plate 301 at the position of each supporting leg 302, and then the vertical distance between the surface of the supporting plate 301 and the emergent laser 4 is measured to obtain the inspection value.
In summary, the present invention provides a method for detecting the installation of a large base on an arc-shaped deck, which uses a laser level as a base installation height reference and a levelness inspection reference. When the base is installed, the prefabricated base is firstly placed at the appointed position of the arc-shaped deck, then the emergent laser of the laser level meter is adjusted to be at the preset installation height, the emergent laser is used as a reference to measure and cut off the supporting legs to form a finished base, and finally the welding is carried out to complete the installation. According to the installation detection method, the prefabricated base is directly placed at the designated position for measurement, so that the measurement and the removal are more suitable for the actual working condition, and meanwhile, the laser level meter is used as the installation standard of all the bases, so that the deviation among the bases is avoided. The remote distance measurement and high precision characteristics of the laser level meter are utilized to greatly improve the installation detection speed, thereby greatly improving the installation check reporting efficiency and shortening the dock period. Meanwhile, the method can be widely applied to the field of ship construction such as high and new ships, official ships and the like, and has higher practical value.
The installation detection method of the laser level meter is applied to practice, the height drop range between the bases can be controlled within 2mm and is smaller than the specified range of 6mm, and the precision requirement is completely met. In addition, the inspection time can be controlled to be about one hour, the inspection progress is greatly shortened, and the efficiency is improved.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (8)
1. The installation detection method of the large base on the arc-shaped deck is characterized by comprising the following steps:
s1: providing a plurality of prefabricated bases, and putting the prefabricated bases to the appointed positions of the arc-shaped deck according to a design drawing, wherein each prefabricated base comprises a supporting plate and a supporting leg which are vertically connected;
s2: placing a laser level meter on a central line of the arc-shaped deck, wherein the central line is positioned at the highest position of the arc-shaped deck, so that emergent laser of the laser level meter is horizontally projected onto supporting legs of the prefabricated base, and adjusting the height of the emergent laser of the laser level meter to enable the emergent laser to be at a preset installation height, wherein the preset installation height is the position of the upper surface of a rear supporting plate after installation is finished;
s3: keeping a support plate of the prefabricated base horizontal, determining intersection points of the emergent laser and each support leg, measuring vertical distances between the intersection points and an arc deck, recording the vertical distances as cutting reserved values, taking the upper surface of the support plate of the prefabricated base as a reference, vertically measuring the cutting reserved values downwards, and marking points on the support legs;
s4: cutting off the lower parts of the supporting legs of the prefabricated base from the marking points to form a finished base;
s5: and putting the finished product base to a designated position again for welding.
2. The mounting inspection method according to claim 1, wherein the predetermined mounting height of the outgoing laser light in step S2 is a height position vertically spaced from the center line by a distance of 70 mm.
3. The mounting detection method according to claim 1, wherein in step S3, the cut reserve value and the mark point are determined by using a proportional three-edged ruler, specifically:
during measurement, the proportional triangular scale is tightly attached to the supporting legs, the vertical distance between the intersection point and the arc-shaped deck is measured along the vertical direction, then the proportional triangular scale is tightly attached to the supporting legs by taking the upper surface of the prefabricated base as a reference, the cutting reserved value is vertically measured downwards, and mark points are made on the supporting legs.
4. The installation detection method of claim 1, wherein in step S3, when the supporting foot cannot be projected by the outgoing laser light of the laser level, the laser level is shifted along the center line of the arc-shaped deck to change the irradiation range of the outgoing laser light.
5. The mounting detection method according to claim 1, wherein in step S5, before or after welding, further comprising a step of checking, in particular:
and (3) rising or lowering the emergent laser of the laser level meter to ensure that the height of the emergent laser does not coincide with the upper surface of the finished product base, then measuring the vertical distance between the upper surface of the supporting plate and the emergent laser at the position of each supporting leg, recording the vertical distance as a detection value, then comparing the size of each detection value, and when the numerical difference of each detection value is within 6mm, conforming to the installation requirement.
6. The installation detection method according to claim 5, wherein the inspection value is obtained by measurement with a proportional three-square ruler, specifically:
and raising the emergent laser of the laser level meter, vertically placing the proportional triangular scale on the supporting plate at the position of each supporting leg, and measuring the vertical distance between the surface of the supporting plate and the emergent laser to obtain the inspection value.
7. The mounting inspection method according to claim 6, wherein the distance between the emitted laser light of the laser level and the upper surface of the support plate is 20mm when the emitted laser light is raised.
8. The installation detection method of claim 1, wherein said laser level is an infrared laser level.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210030863.8A CN114313145A (en) | 2022-01-12 | 2022-01-12 | Installation detection method for large base on arc-shaped deck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210030863.8A CN114313145A (en) | 2022-01-12 | 2022-01-12 | Installation detection method for large base on arc-shaped deck |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114313145A true CN114313145A (en) | 2022-04-12 |
Family
ID=81025849
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210030863.8A Pending CN114313145A (en) | 2022-01-12 | 2022-01-12 | Installation detection method for large base on arc-shaped deck |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114313145A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115031693A (en) * | 2022-06-09 | 2022-09-09 | 安庆中船柴油机有限公司 | Device for testing levelness of base surface of marine main engine |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109367693A (en) * | 2018-10-25 | 2019-02-22 | 上海船舶工艺研究所(中国船舶工业集团公司第十研究所) | A kind of large scale equipment pedestal peculiar to vessel without surplus installation method |
| CN110102982A (en) * | 2019-05-30 | 2019-08-09 | 广船国际有限公司 | A kind of setting-out of equipment base and installation method and setting-out tooling |
| CN110789684A (en) * | 2019-09-25 | 2020-02-14 | 沪东中华造船(集团)有限公司 | Method for assembling large deck machinery body base |
| CN112429171A (en) * | 2020-10-23 | 2021-03-02 | 沪东中华造船(集团)有限公司 | Method for cutting allowance at bottom of base of large-scale ship equipment |
-
2022
- 2022-01-12 CN CN202210030863.8A patent/CN114313145A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109367693A (en) * | 2018-10-25 | 2019-02-22 | 上海船舶工艺研究所(中国船舶工业集团公司第十研究所) | A kind of large scale equipment pedestal peculiar to vessel without surplus installation method |
| CN110102982A (en) * | 2019-05-30 | 2019-08-09 | 广船国际有限公司 | A kind of setting-out of equipment base and installation method and setting-out tooling |
| CN110789684A (en) * | 2019-09-25 | 2020-02-14 | 沪东中华造船(集团)有限公司 | Method for assembling large deck machinery body base |
| CN112429171A (en) * | 2020-10-23 | 2021-03-02 | 沪东中华造船(集团)有限公司 | Method for cutting allowance at bottom of base of large-scale ship equipment |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115031693A (en) * | 2022-06-09 | 2022-09-09 | 安庆中船柴油机有限公司 | Device for testing levelness of base surface of marine main engine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101112180B1 (en) | Edge distance measuring and checking apparatus for bridge bearing | |
| CN109489618B (en) | Engineering construction supervision quality acceptance actual measurement device and method | |
| CN108663021B (en) | Building wall perpendicularity detection device and detection method using same | |
| CN102094532B (en) | Method for measuring and controlling size of building construction horizontal member | |
| CN114313145A (en) | Installation detection method for large base on arc-shaped deck | |
| CN104359391A (en) | Detecting device for reinforced concrete protective layer measurer and floor thickness measurer | |
| CN108845480A (en) | A kind of position alignment of inner layer plates accuracy measurement method | |
| CN105115407A (en) | Portable multifunctional planeness detection device and application method therefor | |
| CN114858071A (en) | Device and method for measuring roughness of superposed surface of precast concrete member | |
| CN113607190A (en) | Building construction horizontal component size measurement and verification method | |
| CN109724493A (en) | Three foot needle-like fireproof coating wet-film thickness measuring instruments of one kind and its measurement method | |
| CN218443819U (en) | Concrete placement thickness and roughness detection device | |
| JP3483631B2 (en) | Stair measurement method and device | |
| CN113959348B (en) | Method for checking height interference in post wheel | |
| CN107764235B (en) | Elevation vertical transmission measurement method for high-rise building construction | |
| CN106092044B (en) | Building level measurement method | |
| CN110986780B (en) | Hole site deviation detection device | |
| CN211147651U (en) | Device for measuring inclination of building | |
| JPH08232265A (en) | Ruler for measuring deviation of structure position | |
| CN206450185U (en) | A kind of deformable sheet materials thickness detection apparatus | |
| CN203550857U (en) | Surfacing layer height measuring ruler | |
| CN212620625U (en) | Floor board surface flatness detection device | |
| JP4514592B2 (en) | Steel tower main leg installation check equipment | |
| CN220644379U (en) | Roadbed settlement monitoring device | |
| JPH0425615Y2 (en) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220412 |