CN109029397B - Portable laser demarcation device for building construction - Google Patents
Portable laser demarcation device for building construction Download PDFInfo
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- CN109029397B CN109029397B CN201810852047.9A CN201810852047A CN109029397B CN 109029397 B CN109029397 B CN 109029397B CN 201810852047 A CN201810852047 A CN 201810852047A CN 109029397 B CN109029397 B CN 109029397B
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- 238000009435 building construction Methods 0.000 title claims abstract description 14
- 238000010276 construction Methods 0.000 claims abstract description 27
- 239000003973 paint Substances 0.000 claims description 12
- 238000003860 storage Methods 0.000 claims description 7
- 239000004593 Epoxy Substances 0.000 claims description 6
- 230000001681 protective effect Effects 0.000 claims description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 4
- 239000004033 plastic Substances 0.000 claims description 4
- 230000002035 prolonged effect Effects 0.000 claims description 4
- 239000011701 zinc Substances 0.000 claims description 4
- 229910052725 zinc Inorganic materials 0.000 claims description 4
- 239000011521 glass Substances 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 19
- 239000011229 interlayer Substances 0.000 abstract description 5
- 230000002349 favourable effect Effects 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 20
- 230000009286 beneficial effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Classifications
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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
- G01C15/002—Active optical surveying means
- G01C15/004—Reference lines, planes or sectors
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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
- G01C15/002—Active optical surveying means
- G01C15/008—Active optical surveying means combined with inclination sensor
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
The invention discloses a portable laser demarcation device for building construction, which is characterized in that a sighting telescope, a level gauge and a switch are sequentially arranged at the top end of a laser demarcation device body from left to right; the two inclined sections at the bottom end of the laser demarcation device body are respectively provided with a laser lamp; the handle is arranged in the middle of the laser demarcation device body, and the power supply device is also arranged in the laser demarcation device body. The line throwing instrument is simple, convenient and quick to install, can greatly improve construction efficiency and construction precision, is favorable for improving construction progress and construction quality, reduces the input of manpower in the use process of the line throwing hammer and the error of a control line in the interlayer transfer process, reduces the potential safety hazard in the outer elevation line throwing process on a high-rise building, is convenient to use and carry, can reduce and even replace the line throwing hammer in the construction process, adopts laser line throwing, cannot be influenced by natural conditions, and is small in size, light in weight, and provided with a USB charging port, and long in continuous service time, and a configurable large-capacity battery is arranged.
Description
Technical Field
The utility model relates to a laser demarcation device, concretely relates to portable laser demarcation device for construction is mainly applied to structure unwrapping wire process, belongs to construction articles for use technical field.
Background
Along with the rapid development of engineering technology, the laser line projector gradually replaces the traditional line hanging hammer, but in the process of moving the construction horizontal control line up layer by layer, the traditional line hanging hammer is used for forming larger errors, particularly in high-rise buildings and super high-rise buildings, the verticality of the building is more difficult to control and is easily influenced by natural environment, although various laser line projectors on the market at present are layered, the application range is narrow, and the portable laser line projector which is applicable to various structures is not available.
Compared with the traditional plumb bob, the line projector is simple to operate, can reduce the input of manpower in the use process of the plumb bob, can be suitable for structures with various shapes compared with the common laser line projector, and can reduce the error of a control line in the interlayer transfer process; in addition, the line projector is simple in manufacture, low in cost, small in material input amount, high in practicality and capable of being widely popularized and used.
Therefore, it is necessary to develop a portable laser line projector for building construction with high practicality and high construction efficiency, which is a key point for solving the above technical problems.
Disclosure of Invention
Aiming at the defects and shortcomings in the background technology, the laser projector improves and innovates the defects, and aims to provide the portable laser projector for building construction, which can adapt to complex and severe construction conditions in site construction, can be suitable for structures with different shapes and has a certain practical value.
The line throwing instrument is simple, convenient and quick to install and easy to carry, can greatly improve construction efficiency and construction precision, is beneficial to improving construction progress and construction quality, reduces manpower input in the use process of the line hanging hammer and reduces errors of control lines in the interlayer transfer process.
In order to solve the problems and achieve the purposes of the invention, the portable laser projector for building construction is realized by adopting the following design structure and the following technical scheme:
as the improvement of this demarcation device for portable construction laser demarcation device, including laser demarcation device body (1), its characterized in that: a sighting telescope (13), a level (14) and a switch (12) are arranged at the top end of the laser demarcation device body (1) in sequence from left to right; two inclined sections at the bottom end of the laser demarcation device body (1) are respectively provided with a laser lamp (11); a handle (15) with a conjoined structure is arranged in the middle of the laser demarcation device body (1), and the handle (15) penetrates through the front and back surfaces of the laser demarcation device body (1); the laser demarcation device is characterized in that a power supply device is further arranged in the laser demarcation device body (1).
As the improvement of the line projector, the whole laser line projector body (1) is of an inverted V-shaped structure, and the laser line projector body (1) of the inverted V-shaped structure is connected with an upper layer structural plate (32) and a structural beam (34) in a clamping way, and the clamping connection is directly clamped and fixedly connected to form a whole or is bound and connected through a limiting rope to form a whole.
As a further improvement of the line projector, the outer surface of the laser line projector body (1) is sprayed with colored paint or a rust-proof layer, and the rust-proof layer comprises epoxy zinc-rich primer and chlorinated rubber finish paint.
As the further improvement of the line projector, the paint is yellow paint, so that the paint is not easy to rust and corrode, and the service life is prolonged; the rust-proof layer also comprises an epoxy cloud iron intermediate paint positioned between the epoxy zinc-rich primer and the chlorinated rubber top-coat.
As the aforesaid of this demarcation device still further improves, the total number of laser lamp (11) sets up to two, and two laser lamps (11) set up respectively on two upper and lower inclined cross sections of laser demarcation device body (1), just laser lamp (11) adopt infrared lamp light, are the linearity when opening and throw respectively front end and lower extreme.
As the further improvement of the line projector, the protective cover matched with the laser lamp (11) is movably arranged outside the laser lamp, and the protective cover is a glass protective cover, so that the laser lamp is not easy to damage and the service life is prolonged.
As a still further improvement of the line projector, the whole switch (12) is a plastic long-strip arc-shaped member which is arranged at the upper part of the handle (156) and used for controlling the opening and closing of the laser lamp (11), and a plurality of rubber anti-skid protrusions are arranged in the external hand-held part area of the switch (12); the level (14) is an electronic level or a bubble level.
As a still further improvement of the above-mentioned line projector, the level (14) is an electronic level, the electronic level is mounted on the outer wall of the upper end of the laser line projector body (1), and the level (14) is located between the switch (12) and the sighting telescope (13) and is used for displaying whether the plane perpendicular to the light beam emitted by the laser lamp (11) is horizontal or not.
As the aforesaid of this projection appearance still further improvement, handle (15) wholly be hollow rectangular form structure, be provided with on this rectangular form structure handle (15) with its looks adaptation rubber antiskid cover (15 a), be provided with a plurality of anti-skidding protrusion on this rubber antiskid cover (15 a).
As the projection instrument, the power supply device comprises a charging port (16), a storage battery (17) and a two-core flexible wire (18), wherein the two-core flexible wire (18) is used for connecting the storage battery (17), the switch (12), the charging port (16) and the laser lamp (11); the storage battery (17) is used for charging the demarcation device (1); and the charging port (16) is a Micro USB interface.
When the laser beam projection device is used, laser beams can be respectively projected in the horizontal direction and the vertical direction, the laser beams in the vertical direction are aligned with the straight line released from the lower layer, and the position where the horizontal laser beams pass is the horizontal line of the lower layer straight line projection on the upper layer.
The level (14) is arranged at the upper end of the projector (1), and when the projector (1) is used, the projector (1) is adjusted to be in a horizontal state through the position of the level bubble (14).
The handle (15) and the demarcation device (1) body form an integrated structure, and when the demarcation device is used, the handle (15) is held by hand, and the inner clamping right angle of the demarcation device (1) is clamped at the external corner of the concrete member.
Compared with the prior art, the line projector has the beneficial effects that:
1. the line projector is simple, convenient and quick to install, greatly improves the construction efficiency and the construction precision, and is beneficial to improving the construction progress and the construction quality;
2. the laser demarcation device shell of the demarcation device is made of hard plastic, so that the firmness is high, the environmental protection is realized, the material investment is reduced, the cost is reduced, and the practicability is high;
3. the line projector can reduce the input of manpower in the use process of the line hanging hammer;
4. the line projector can be suitable for structures with various shapes;
5. the line projector can reduce errors of control lines in the interlayer transfer process.
Drawings
The following describes in further detail the specific embodiments of the present projector with reference to the accompanying drawings, in which:
FIG. 1 is a large sample view of the body of the present projector;
FIG. 2 is a second large sample of the body of the present projector;
FIG. 3 is a cross-sectional view of the present projector;
FIG. 4 is a top view of the present line projector;
FIG. 5 is a bottom view of the present line projector;
FIG. 6 is a front view of the present projector;
FIG. 7 is a front view of the present projector;
FIG. 8 is a rear view of the present projector;
FIG. 9 is a large sample of a tripod;
FIG. 10 is a reference view of the first embodiment of the present projector in use;
FIG. 11 is a reference view of the second embodiment of the present projector in use;
FIG. 12 is a reference view of a third embodiment of the present projector in use;
FIG. 13 is a schematic view of the body operation of the present projector;
wherein, the reference numerals in the figures: 1-line projector body, 11-laser lamp, 12-switch, 13-sighting telescope, 14-level gauge, 15-handle, 16-charging port, 17-storage battery, 18-two-core flexible wire, 19-support fixing hole, 2-laser beam, 21-horizontal laser beam, 22-vertical laser beam, 31-arc structural plate, 32-upper structural plate, 33-lower structural plate, 34-structural beam, 35-structural column, 36-line throwing hole, 4-triangle support, 41-bolt fixing rod, 42-level bubble, 43-support rod, 44-adjusting knob, 5-arc projection line, 6-horizontal control line, 7-horizontal control line projection line, 8-outer vertical control line, 9-control point.
Detailed Description
In order to make the technical means, creation characteristics, achievement purposes and effects of the projector easy to understand, the technical scheme of the projector is described in further detail below with reference to the accompanying drawings and the detailed description.
Example 1 (for horizontal control line transfer between layers)
The device is used for being assembled as a standby before working, and the specific operation modes are as follows:
step one: as shown in fig. 10, the lower floor is cleaned first, and the horizontal control line is exposed;
step two: the portable laser line projector 1 for building construction is clamped on the external corner of an upper layer concrete structural member;
step three: opening the switch 12 to emit the laser beam 2;
step four: directing a vertical laser beam 21 at the lower horizontal control line 6;
step five: leveling and centering the level 14 of the line projector 1;
step six: again checking whether the vertical laser beam 21 is aligned with the lower horizontal control line 6;
step seven: the upper level horizontal control line pops up where the horizontal laser beam 22 passes.
After the use process is finished, the line projector 1 is taken down, and the specific steps are as follows:
step one: the operator firstly turns off the switch 12 of the line projector 1;
step two: finally, the line projector 1 is taken down.
Example 2 (control line for curved surface)
As shown in fig. 11, a portable laser demarcation device for construction includes a laser demarcation device body 1, and is characterized in that: a sighting telescope 13, a level 14 and a switch 12 are arranged on the top end of the laser demarcation device body 1 in sequence from left to right; the two inclined cross sections at the bottom end of the laser demarcation device body 1 are respectively provided with a laser lamp 11; the middle part of the laser demarcation device body 1 is provided with a handle 15 with a conjoined structure, and the handle 15 penetrates through the front and back surfaces of the laser demarcation device body 1; a power supply device is also arranged in the laser demarcation device body 1; wherein, the buckle of the laser demarcation device 1 is provided with a tripod fixing hole 19; the laser line projector 1 is also provided with a tripod 4 as an auxiliary device.
In the second embodiment, before use, the tripod 4 needs to be assembled as a spare, and the operation of auxiliary matching is completed in advance.
The specific operation is as follows:
as shown in fig. 11, since the ink lines on the arc-shaped structural plate 31 are not easy to straighten, errors are easily caused when the control lines are sprung, the line projector 1 can project 7 the control lines on the arc surface by the laser beam 2, and then the control lines are sprung in sections, so that the errors are reduced. The specific using steps are as follows:
step one: firstly, roughly cleaning a region on the cambered surface through which a control line passes;
step two: two end points of a control line are found out on the cambered surface by using a tape measure, a total station and the like to serve as control points 1;
step three: fixing the triangular bracket on the line projector 1 and screwing the triangular bracket;
step four: the line projector is placed between two control points 9, a switch 12 is turned on, and a laser beam 11 is emitted;
step five: aligning and controlling the laser beam 2 to two control points 9;
step six: centering the vial 42 on the tripod 4 by adjusting the knob 44 on the tripod 4;
step seven: again checking whether the laser beam 2 is aimed at two control points 9;
step eight: after the above steps are completed, the position where the laser beam 2 passes is the projection line 7 of the horizontal control line 6 on the cambered surface;
step nine: the ink lines are ejected in sections on the path of the laser beam 2, and the ejected ink lines are connected to form the required horizontal control line.
After the use process is finished, the line projector 1 is taken down, and the specific steps are as follows:
step one: closing the light switch 12 of the line projector 1;
step two: the line projector 1 and the triangular bracket 4 are taken down;
step three: the tripod 4 is removed from the line projector 1.
The aperture of the tripod fixing hole 19 is matched with the outer diameter of the bolt fixing rod 41 on the tripod 4, and the inner wall of the tripod fixing hole is of a spiral structure.
In the whole implementation operation process, the tripod 4 consists of a bolt fixing rod 41, a fixing surface disc 45 and three identical bracket rods 43, the upper end of the fixing screw 41 is provided with a spiral structure, and the outer diameter of the spiral structure is matched with the inner diameter of the tripod fixing hole 19 on the demarcation device.
The bolt fixing rods 41 are connected with three support rods 43 through fixing face plates 45, and a level bubble 42 is arranged on one side of each fixing face plate 45 and used for adjusting the level of the triangular support 4.
The number of the bracket rods 43 is three, each bracket rod 43 is formed by embedding two hollow cylinders with different diameters, wherein the outer diameter of the upper hollow cylinder is matched with the inner diameter of the lower hollow cylinder, the two cylinders form a drawable structure, an adjusting knob 44 is arranged at the middle-upper position of the lower hollow cylinder, when the knob 44 is unscrewed, the height of the triangular bracket 4 can be adjusted, and after the height adjustment is completed, the knob 44 is screwed tightly and fixed.
Example III (for measuring verticality deviation of high-rise building)
As shown in fig. 12, when measuring the deviation of the perpendicularity of a high-rise building, a first horizontal control line 7 is generally hung to the top layer by a plumb bob, and an operator generally needs to climb onto an outer frame to hang the line in the process, so that on one hand, the potential safety hazard of dropping the line on the outer frame is high; on the other hand, the higher the building is, the larger the influence of wind power on the line hanging hammer is, the error is easy to exist in the line hanging out, and when the horizontal control line is projected to the top layer by using the line projector, the potential safety hazard can be reduced, the influence of the natural environment is avoided, and the error is small. The specific using steps are as follows:
step one: when pouring floors, 3 to 4 casting holes 1 are reserved on the plate, and note that the casting holes 1 of each layer are on the same vertical line;
step two: projecting the first layer horizontal control line 6 layer by layer to the top layer by using a plumb bob;
step three: the buckle of the line projector 1 is clamped on the external corner of the top outer wall;
step four: opening the switch 12;
step five: aligning the vertical laser beam 2 to the first layer horizontal control line 6;
step six: the level 14 on the demarcation device is adjusted to be in the middle, so that the level of the demarcation device 1 is ensured;
step seven: again checking whether the vertical laser beam 22 is aligned with the first horizontal control line 6;
step eight: a straight line is popped up on the path of the horizontal laser beam 21, namely a projection line 7 of the lower horizontal control line 6 on the top layer;
step nine: and comparing and measuring the straight line projected by the line projector 1 with the straight line projected by the plumb bob, and judging the verticality deviation of the building.
After the use process is finished, the line projector 1 is taken down, and the specific steps are as follows:
step one: closing the switch 12 of the line projector 1;
step two: the line projector 1 is taken down.
In summary, the line projector has the following advantages in the specific embodiment:
the line projector is simple, convenient and quick to install, greatly improves the construction efficiency and the construction precision, and is beneficial to improving the construction progress and the construction quality; the shell of the laser demarcation device is made of hard plastic, so that the shell is high in firmness, environment-friendly, low in material investment, low in cost and high in practicality; the input of manpower in the use process of the plumb bob can be reduced; can be applied to structures of various shapes; the error of the control line in the interlayer transmission process can be reduced, so that the method can be widely popularized and applied.
Finally, it should be noted that the concept, specific structure and technical effects of the present projector have been clearly and completely described above in connection with the embodiments and the drawings, so as to fully understand the purposes, features and effects of the present projector. It is apparent that the described embodiments are only some embodiments of the present projector, but not all embodiments, and that other embodiments, based on the embodiments of the present projector, obtained by a person skilled in the art without the inventive effort, are within the scope of protection of the present projector. In addition, all the connection and connection relations mentioned herein do not refer to direct connection of the components, but rather refer to that a better connection structure can be formed by adding or reducing connection auxiliary parts according to specific implementation conditions. The technical features in the creation of the line projector can be combined interactively on the premise of no contradiction and conflict.
Claims (9)
1. The utility model provides a portable laser demarcation device for construction, includes laser demarcation device body (1), its characterized in that: the laser demarcation device comprises a laser demarcation device body (1), a laser demarcation device and a laser demarcation device, wherein the laser demarcation device body (1) is of an inverted V-shaped structure, the inverted V-shaped structure is provided with an inner side surface forming a V-shaped recess and an outer side surface opposite to the inner side surface, a connecting part between the inner side surface and the outer side surface is a bottom surface, the bottom part of the outer side surface is a top surface, and the V-shaped recess is a buckle part;
a sighting telescope (13), a level (14) and a switch (12) are arranged at the top end of the laser demarcation device body (1) in sequence from left to right; two inclined sections at the bottom end of the laser demarcation device body (1) are respectively provided with a laser lamp (11); a handle (15) with a conjoined structure is arranged in the middle of the laser demarcation device body (1), and the handle (15) penetrates through the front and back surfaces of the laser demarcation device body (1); the laser demarcation device is characterized in that a power supply device is further arranged in the laser demarcation device body (1), wherein:
the laser demarcation device body (1) further comprises a tripod (4), and a tripod fixing hole (19) is formed in the buckle position; the triangular bracket (4) consists of a bolt fixing rod (41), a fixing surface disc (45) and three identical bracket rods (43), the upper end of the bolt fixing rod (41) is provided with a spiral structure, and the outer diameter of the bolt fixing rod is matched with the inner diameter of a triangular bracket fixing hole (19) on the laser demarcation device body (1);
the bolt fixing rods (41) are connected with the three support rods (43) through fixing face plates (45), and a level bubble (42) is arranged on one side of each fixing face plate (45) and used for adjusting the level of the triangular support (4);
the laser demarcation device body (1) is detachably connected with the triangular bracket (4) through threads;
the laser demarcation device body (1) can also be clamped and connected with the upper layer structural plate (32) and the structural beam (34) through the clamping part, and the clamping connection is direct clamping and fixed connection to form an integral or is bound and connected through a limiting rope to form an integral;
the laser lamp (11) is linearly and respectively thrown to the front end and the lower end when being turned on.
2. The portable laser projector for building construction of claim 1, wherein: the outer surfaces of the laser demarcation device bodies (1) are respectively sprayed with a colored paint or a rust-proof layer, and the rust-proof layer comprises an epoxy zinc-rich primer and a chlorinated rubber top paint.
3. The portable laser projector for building construction according to claim 2, wherein: the paint is yellow paint, so that the paint is not easy to rust and corrode, and the service life is prolonged; the rust-proof layer also comprises an epoxy cloud iron intermediate paint positioned between the epoxy zinc-rich primer and the chlorinated rubber top-coat.
4. The portable laser projector for building construction of claim 1, wherein: the total number of the laser lamps (11) is two, the two laser lamps (11) are respectively arranged on the upper inclined section and the lower inclined section of the laser demarcation device body (1), and the laser lamps (11) adopt infrared lamp light.
5. The portable construction laser line projector according to claim 4, wherein: the outside of the laser lamp (11) is movably provided with a protective cover matched with the laser lamp, and the protective cover is a glass protective cover, so that the laser lamp is not easy to damage and the service life is prolonged.
6. The portable laser projector for building construction of claim 1, wherein: the switch (12) is integrally a plastic long-strip-shaped arc-shaped member, the long-strip-shaped arc-shaped member is arranged at the upper part of the handle (15) and used for controlling the opening and closing of the laser lamp (11), and a plurality of rubber anti-slip protrusions are arranged in the external handheld part area of the switch (12); the level (14) is an electronic level or a bubble level.
7. The portable laser projector for building construction of claim 1, wherein: the leveling instrument (14) is an electronic leveling instrument, the electronic leveling instrument is arranged on the outer wall of the upper end of the laser projection instrument body (1), and the leveling instrument (14) is positioned between the switch (12) and the sighting telescope (13) and is used for displaying whether a plane perpendicular to a light beam emitted by the laser lamp (11) is horizontal or not.
8. The portable laser projector for building construction of claim 1, wherein: the handle (15) is of a hollow strip-shaped structure, a rubber anti-slip sleeve (15 a) matched with the handle (15) of the strip-shaped structure is arranged on the handle (15), and a plurality of anti-slip protrusions are arranged on the rubber anti-slip sleeve (15 a).
9. The portable laser projector for building construction of claim 1, wherein: the power supply device comprises a charging port (16), a storage battery (17) and a two-core flexible wire (18), wherein the two-core flexible wire (18) is used for connecting the storage battery (17), the switch (12), the charging port (16) and the laser lamp (11); the storage battery (17) is used for charging the laser demarcation device body (1); and the charging port (16) is a Micro USB interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810852047.9A CN109029397B (en) | 2018-07-30 | 2018-07-30 | Portable laser demarcation device for building construction |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810852047.9A CN109029397B (en) | 2018-07-30 | 2018-07-30 | Portable laser demarcation device for building construction |
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| Publication Number | Publication Date |
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| CN109029397A CN109029397A (en) | 2018-12-18 |
| CN109029397B true CN109029397B (en) | 2024-02-06 |
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| CN109839103B (en) * | 2019-04-15 | 2023-06-27 | 湖南科技大学 | Adjustable curve projector for building construction measurement and use method |
| CN112729227B (en) * | 2020-12-31 | 2022-06-17 | 宁波建工工程集团有限公司 | Tower crane attaches wall and measures auxiliary device |
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