CN116592798A - Concrete roughness detection device - Google Patents
Concrete roughness detection device Download PDFInfo
- Publication number
- CN116592798A CN116592798A CN202310554267.4A CN202310554267A CN116592798A CN 116592798 A CN116592798 A CN 116592798A CN 202310554267 A CN202310554267 A CN 202310554267A CN 116592798 A CN116592798 A CN 116592798A
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- Prior art keywords
- fixed
- wall
- leveling instrument
- laser leveling
- cylinder
- 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
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- 238000001514 detection method Methods 0.000 title claims abstract description 15
- 238000001125 extrusion Methods 0.000 claims abstract description 18
- 238000012546 transfer Methods 0.000 claims abstract description 7
- 238000004804 winding Methods 0.000 claims description 17
- 238000003860 storage Methods 0.000 claims description 10
- 230000008878 coupling Effects 0.000 claims 2
- 238000010168 coupling process Methods 0.000 claims 2
- 238000005859 coupling reaction Methods 0.000 claims 2
- 239000000428 dust Substances 0.000 abstract description 13
- 238000005259 measurement Methods 0.000 abstract description 11
- 230000005540 biological transmission Effects 0.000 description 21
- 230000001681 protective effect Effects 0.000 description 7
- 238000010276 construction Methods 0.000 description 5
- 238000007664 blowing Methods 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/30—Measuring arrangements characterised by the use of optical techniques for measuring roughness or irregularity of surfaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B5/00—Cleaning by methods involving the use of air flow or gas flow
- B08B5/02—Cleaning by the force of jets, e.g. blowing-out cavities
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention discloses a concrete flatness detection device, and relates to the technical field of concrete templates. The laser leveling instrument comprises a base, wherein a supporting plate is fixed at the top of the base, a top plate is fixed at the top of the supporting plate, an air cylinder is fixed at the bottom of the top plate, and a laser leveling instrument is fixed at the bottom of the air cylinder. This concrete flatness detection device, when not using the laser leveling instrument, can start the cylinder and make the laser leveling instrument upwards move, can extrude the slope piece through the extrusion pole and remove left, drive the slider and remove left, can make slider extrusion drive plate remove left, through the cooperation of transfer line, movable rod, connecting block and second electrode plate, make second electrode plate and first electrode plate contact, can carry out the circular telegram to the fan, make the fan start, can blow the measurement department of laser leveling instrument, can blow the dust that adheres to on the laser leveling instrument off for, prevent that a large amount of dust of adhesion from on the laser leveling instrument from influencing the measurement of laser leveling instrument.
Description
Technical Field
The invention relates to the technical field of concrete template flatness detection, in particular to a concrete flatness detection device.
Background
The concrete template refers to a template formed by newly casting concrete and a whole set of construction system for supporting the template, the classification of the template is divided into a plane template and a curved surface template according to the shape by various different staged methods; the concrete template is divided into a bearing template and a non-bearing template according to stress conditions, and when the concrete template is used, the flatness of the concrete template is required to be detected, so that the cast concrete is prevented from being uneven.
In the prior art, when the flatness of the concrete template is detected, a laser leveling instrument is needed, however, the laser leveling instrument is generally used on a construction site, so that a large amount of dust can fall on the measuring position of the laser leveling instrument, laser can be shielded, and the like, so that the measurement of the laser leveling instrument is influenced, and the measuring result is inaccurate; in view of this, we propose a concrete flatness detection device.
Disclosure of Invention
(one) solving the technical problems
Aiming at the defects of the prior art, the invention provides a concrete flatness detection device, which solves the problems mentioned in the background art.
(II) technical scheme
In order to achieve the above purpose, the invention is realized by the following technical scheme: the utility model provides a concrete flatness detection device, includes the base, the top of base is fixed with the backup pad, the top of backup pad is fixed with the roof, the bottom of roof is fixed with the cylinder, the bottom of cylinder is fixed with the laser leveling instrument, the top of base is fixed with places the board, the lateral wall of cylinder is fixed with fixed frame, be provided with protection machanism and control mechanism on the fixed frame, protection machanism includes:
the rotating rod is rotatably arranged on the inner wall of the fixed frame;
the cylinder is fixed on the outer wall of the rotating rod, and an arc chute is formed in the outer wall of the cylinder;
the winding wheel, the outer wall at the dwang is fixed to the winding wheel, the outer wall of winding wheel is fixed with the stay cord, the one end that the winding wheel was kept away from to the stay cord is fixed at the inner wall of safety cover, safety cover slidable mounting is at the outer wall of cylinder.
Preferably, an extrusion rod is fixed at the top of the laser leveling instrument.
Preferably, the inner wall slidable mounting of fixed frame has the slope piece, the right side of slope piece is fixed with drive spring, drive spring's right side is fixed at the inner wall of fixed frame, the top of slope piece is fixed with the slider.
Preferably, a reset spring is fixed on the inner wall of the protective cover, the bottom of the reset spring is fixed on a supporting block, and the supporting block is fixed on the outer wall of the air cylinder.
Preferably, an elastic telescopic rod is fixed on the right side of the fixed frame, a fan is fixed at the right end of the elastic telescopic rod, and a first electrode plate is fixed on the left side of the fan.
Preferably, the control mechanism comprises a storage battery, the storage battery is fixed on the right side of the fixed frame, a connecting wire is fixed at the top of the storage battery, and a second electrode plate is fixed at the top of the connecting wire.
Preferably, the bottom of second electrode plate is fixed with the connecting block, the bottom of connecting block articulates there is the movable rod, the one end that the connecting block was kept away from to the movable rod articulates at the transfer line, the one end that the movable rod was kept away from to the transfer line is fixed with the drive plate.
Preferably, a connecting spring is fixed at the bottom of the second electrode plate, a fixing block is fixed at the bottom of the connecting spring, and the fixing block is fixed at the right side of the fixing frame.
Preferably, a through hole is formed in the bottom of the fixing frame.
(III) beneficial effects
The invention provides a concrete flatness detection device. The beneficial effects are as follows:
(1) This concrete flatness detection device, when not using the laser leveling instrument, can start the cylinder and make the laser leveling instrument upwards move, can extrude the slope piece through the extrusion pole and remove left, drive the slider and remove left, can make slider extrusion drive plate remove left, through the cooperation of transfer line, movable rod, connecting block and second electrode plate, make second electrode plate and first electrode plate contact, can carry out the circular telegram to the fan, make the fan start, can blow the measurement department of laser leveling instrument, can blow the dust that adheres to on the laser leveling instrument off for, prevent that a large amount of dust of adhesion from on the laser leveling instrument from influencing the measurement of laser leveling instrument.
(2) This concrete flatness detection device, when not using laser leveling instrument, can start the cylinder and make laser leveling instrument upwards move, through the cooperation of extrusion stem, the through-hole, the slope piece, drive spring, the slider, the drum, the arc spout, the dwang, rolling wheel and stay cord, can make the safety cover downwardly moving, can make the safety cover laser leveling instrument, and then can play the effect to protect laser leveling instrument, because of laser leveling instrument also exposes outside for a long time, when transporting the device, can make laser leveling instrument receive damage such as collision, reduce laser leveling instrument life.
(3) This concrete flatness detection device, when needs use laser leveling instrument, when the extrusion stem was not extrudeed the sloping block, because of transmission spring is in tensile state, can make the sloping block remove right, makes the slider not extrude the drive plate, through the cooperation of connecting spring, makes the second electrode plate move back to the normal position downwards, makes second electrode plate and first electrode plate contactless, gets into can outage to the fan, makes the fan not start, prevents that the fan from starting always and causes the electric energy waste.
Drawings
FIG. 1 is a schematic view of the overall apparatus of the present invention;
FIG. 2 is a schematic diagram of the overall front view of the present invention;
FIG. 3 is an enlarged schematic view of the structure A of FIG. 2 in accordance with the present invention;
FIG. 4 is an enlarged schematic view of the B structure of FIG. 2 in accordance with the present invention;
FIG. 5 is an enlarged schematic view of the structure C of FIG. 4 in accordance with the present invention;
FIG. 6 is an enlarged schematic view of the D structure of FIG. 5 according to the present invention;
fig. 7 is a schematic view of the structure of the cylinder of the present invention.
In the figure: 1. a base; 2. placing a plate; 3. a support plate; 4. a top plate; 5. a cylinder; 6. a laser leveling instrument; 7. an extrusion rod; 8. a fixed frame; 9. a through hole; 10. a tilting block; 11. a transmission spring; 12. a slide block; 14. a protection mechanism; 141. a rotating lever; 142. a cylinder; 143. an arc chute; 144. a winding wheel; 145. a pull rope; 146. a protective cover; 147. a return spring; 148. a support block; 15. an elastic telescopic rod; 16. a blower; 17. a first electrode plate; 18. a control mechanism; 181. a storage battery; 182. a connecting wire; 183. a second electrode plate; 184. a connecting spring; 185. a connecting block; 186. a movable rod; 187. a transmission rod; 188. a fixed block; 189. and a transmission plate.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1 to 7, the present invention provides a technical solution: the utility model provides a concrete flatness detection device, including base 1, the top of base 1 is fixed with backup pad 3, the top of backup pad 3 is fixed with roof 4, the bottom of roof 4 is fixed with cylinder 5, the bottom of cylinder 5 is fixed with laser leveling instrument 6, laser leveling instrument 6 is with a laser plane to cover the measured plane, then measure the distance of measured plane to laser plane, but these distances are not final results, utilize these raw data, calculate the best plane of this measured plane and then obtain the result of flatness, generally calculate the peak value, root mean square value, flatness index such as standard deviation, need be used laser leveling instrument 6 to measure the template of concrete in the construction trade, the top of base 1 is fixed with and places board 2, when need to measure the concrete template, can place the concrete template on placing board 2, the laser leveling instrument 6 can be started to measure the concrete templates, the height of the laser leveling instrument 6 can be adjusted by starting the air cylinder 5, concrete templates with different thicknesses can be measured, the right side of the air cylinder 5 is fixed with the fixed frame 8, the bottom of the fixed frame 8 is provided with the through hole 9, the top of the laser leveling instrument 6 is fixed with the extrusion rod 7, the diameter of the through hole 9 is matched with the diameter of the extrusion rod 7, the inner wall of the fixed frame 8 is slidably provided with the inclined block 10, the right side of the inclined block 10 is fixed with the transmission spring 11, one side of the transmission spring 11 far away from the inclined block 10 is fixed on the inner wall of the fixed frame 8, the top of the inclined block 10 is fixed with the sliding block 12, when the laser leveling instrument 6 is not used, the air cylinder 5 can be started to drive the laser leveling instrument 6 to move upwards, when the extrusion rod 7 stretches into the fixed frame 8 through the through hole 9 of the fixed frame 8, the extrusion rod 7 can extrude the inclined surface of the inclined block 10, the inclined block 10 can approach the air cylinder 5 due to extrusion force, the transmission spring 11 stretches, the inclined block 10 drives the sliding block 12 to move leftwards, and the protection mechanism 14 is arranged on the fixed frame 8.
The protection mechanism 14 comprises a rotating rod 141, the rotating rod 141 is rotatably mounted on the inner wall of the fixed frame 8, a cylinder 142 is fixed on the outer wall of the rotating rod 141, an arc-shaped chute 143 for sliding the sliding block 12 is arranged on the outer wall of the cylinder 142, when the sliding block 12 moves leftwards in the arc-shaped chute 143, the cylinder 142 is driven to rotate forwards, the rotating rod 141 rotates forwards, a winding wheel 144 is fixed on the outer wall of the rotating rod 141, the rotating rod 141 can drive the winding wheel 144 to rotate forwards, a pull rope 145 is fixed on the outer wall of the winding wheel 144, one end of the pull rope 145 far away from the winding wheel 144 is fixed on the inner wall of the protection cover 146, the protection cover 146 is slidably mounted on the outer wall of the air cylinder 5, when the winding wheel 144 rotates forwards, the winding wheel 144 can wind the pull rope 145, the protection cover 146 moves downwards on the air cylinder 5, a reset spring 147 is fixed on the inner wall of the protection cover 146, the bottom of reset spring 147 is fixed with supporting shoe 148, the outer wall at cylinder 5 is fixed to supporting shoe 148, and then when the safety cover 146 moves down, can make reset spring 147 compress, when safety cover 146 moves down, can make safety cover 146 protect laser leveling instrument 6, prevent when not using laser leveling instrument 6, because of laser leveling instrument 6 also exposes outside for a long time, when transporting the device, can make laser leveling instrument 6 receive the damage such as collision, reduce laser leveling instrument 6 life, the right side of fixed frame 8 is fixed with flexible telescopic link 15, the one end that flexible telescopic link 15 kept away from fixed frame 8 is fixed with fan 16, the left side of fan 16 is fixed with first electrode plate 17, first electrode plate 17 and fan 16 electric connection are provided with control mechanism 18 on the fixed frame 8.
The control mechanism 18 comprises a storage battery 181, the storage battery 181 is fixed on the right side of the fixed frame 8, a connecting wire 182 is fixed on the top of the storage battery 181, a second electrode plate 183 is fixed on the top of the connecting wire 182, the connecting wire 182 is a flexible wire, the second electrode plate 183 is slidably mounted on the right side of the fixed frame 8, a connecting block 185 is fixed on the bottom of the second electrode plate 183, a movable rod 186 is hinged on the bottom of the connecting block 185, one end of the movable rod 186 far away from the connecting block 185 is hinged on a transmission rod 187, the transmission rod 187 penetrates the right side of the fixed frame 8, the transmission rod 187 is slidably connected with the penetrating part of the fixed frame 8, one end of the transmission rod 187 far away from the movable rod 186 is fixedly provided with a transmission plate 189, when the sliding block 12 moves leftwards to be attached to the right side of the transmission plate 189, the sliding block 12 is extruded by the transmission plate 189 to move leftwards, the transmission rod 187 is leftwards by the movable rod 186, the second electrode plate 183 can be moved upwards, the connecting spring 184 is fixed at the bottom of the second electrode plate 183, the bottom of the connecting spring 184 is fixed at the top of the fixed block 188, the fixed block 188 is fixed at the right side of the fixed frame 8, when the second electrode plate 183 moves upwards, the connecting spring 184 is stretched to enable the second electrode plate 183 to be contacted with the first electrode plate 17, further, the fan 16 can be powered, the fan 16 can be started, the laser measurement of the laser leveling instrument 6 can be blown, dust and the like can be possibly attached to the measuring position of the laser leveling instrument 6 due to a large amount of dust on a construction site, the dust attached to the measuring position of the laser leveling instrument 6 can be blown by blowing, the excessive attached dust is prevented, the measurement of the laser leveling instrument 6 is influenced, when the second electrode plate 183 continues to move upwards, the second electrode plate 183 can be pressed to the first electrode plate 17 to move rightwards, further, the elastic telescopic rod 15 is stretched, when the second electrode plate 183 moves to the top of the first electrode plate 17, the second electrode plate 183 is further not contacted with the first electrode plate 17, the fan 16 is further powered off, no blowing is performed, the fan 16 is prevented from being always in an open state, resource waste is easily caused, when the laser leveling instrument 6 needs to be used, the cylinder 5 is further started, the laser leveling instrument 6 is moved downwards, the extrusion rod 7 is further away from the inclined block 10, the sliding block 12 is further moved rightward in the arc-shaped sliding groove 143 due to the stretching state of the transmission spring 11, the cylinder 142 is reversed, the rolling rod 141 drives the rolling wheel 144 to be reversed, when the pull rope 145 is loosened, the restoring spring 147 is in a compressed state, the protective cover 146 is moved upward, the laser leveling instrument 6 is exposed, the laser leveling instrument 6 can be used, when the sliding block 12 moves rightward, the sliding block 12 does not squeeze the transmission plate 189, the connecting spring 184 is in a stretched state, the second electrode plate 183 moves downward to be in place, when the second electrode plate 183 returns to be in place, the second electrode plate 183 contacts the first electrode plate 17 again, the fan 16 is started again, and the secondary cleaning effect can be achieved.
When the concrete template is needed to be measured, the concrete template can be placed on the placing plate 2, the laser leveling instrument 6 can be started to measure the concrete template, the height of the laser leveling instrument 6 can be adjusted by starting the air cylinder 5, the concrete templates with different thicknesses can be measured, when the laser leveling instrument 6 is not used, the air cylinder 5 can be started to drive the laser leveling instrument 6 to move upwards, when the extrusion rod 7 stretches into the fixed frame 8 through the through hole 9 of the fixed frame 8, the extrusion rod 7 can extrude the inclined surface of the inclined block 10, the inclined block 10 can approach the air cylinder 5 due to extrusion force, the transmission spring 11 stretches, the inclined block 10 drives the sliding block 12 to move leftwards, when the sliding block 12 moves leftwards in the arc-shaped sliding groove 143, the cylinder 142 is driven to rotate forwards, the rotating rod 141 is rotated forward, the rotating rod 141 can drive the winding wheel 144 to rotate forward, the winding wheel 144 winds the pull rope 145, the protective cover 146 moves downwards on the cylinder 5, when the protective cover 146 moves downwards, the return spring 147 can be compressed, when the protective cover 146 moves downwards, the protective cover 146 can protect the laser leveling instrument 6 from being used, the laser leveling instrument 6 is prevented from being exposed to the outside for a long time, when the device is transported, the laser leveling instrument 6 can be damaged due to collision and the like, the service life of the laser leveling instrument 6 is reduced, when the sliding block 12 moves leftwards to be attached to the right side of the transmission plate 189, the sliding block 12 can squeeze the transmission plate 189 to move leftwards, the transmission rod 187 moves leftwards, the second electrode plate 183 can move upwards through the movable rod 186, the second electrode plate 183 is contacted with the first electrode plate 17, so that the fan 16 can be powered, the fan 16 is started, the laser measurement of the laser leveling instrument 6 can be blown, dust and the like can be attached to the measurement position of the laser leveling instrument 6 due to more dust on a construction site, the dust attached to the measurement position of the laser leveling instrument 6 can be blown off through blowing, excessive attached dust is prevented, and the measurement of the laser leveling instrument 6 is affected.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. The utility model provides a concrete roughness detection device, includes base (1), its characterized in that: the top of base (1) is fixed with backup pad (3), the top of backup pad (3) is fixed with roof (4), the bottom of roof (4) is fixed with cylinder (5), the bottom of cylinder (5) is fixed with laser leveling instrument (6), the top of base (1) is fixed with places board (2), the lateral wall of cylinder (5) is fixed with fixed frame (8), be provided with protection machanism (14) and control mechanism (18) on fixed frame (8), protection machanism (14) include:
a rotating rod (141), wherein the rotating rod (141) is rotatably arranged on the inner wall of the fixed frame (8);
the cylinder (142) is fixed on the outer wall of the rotating rod (141), and an arc chute (143) is formed in the outer wall of the cylinder (142);
the winding wheel (144), the outer wall at dwang (141) is fixed to winding wheel (144), the outer wall of winding wheel (144) is fixed with stay cord (145), the one end that winding wheel (144) was kept away from to stay cord (145) is fixed the inner wall of safety cover (146), the outer wall at cylinder (5) is installed in safety cover (146) slidable.
2. The concrete flatness detecting apparatus of claim 1, wherein: the top of the laser leveling instrument (6) is fixed with an extrusion rod (7).
3. The concrete flatness detecting apparatus of claim 1, wherein: the inner wall slidable mounting of fixed frame (8) has slope piece (10), the right side of slope piece (10) is fixed with drive spring (11), the right side of drive spring (11) is fixed at the inner wall of fixed frame (8), the top of slope piece (10) is fixed with slider (12).
4. The concrete flatness detecting apparatus of claim 1, wherein: the inner wall of the protection cover (146) is fixed with a return spring (147), the bottom of the return spring (147) is fixed on a supporting block (148), and the supporting block (148) is fixed on the outer wall of the air cylinder (5).
5. The concrete flatness detecting apparatus of claim 1, wherein: an elastic telescopic rod (15) is fixed on the right side of the fixed frame (8), a fan (16) is fixed at the right end of the elastic telescopic rod (15), and a first electrode plate (17) is fixed on the left side of the fan (16).
6. The concrete flatness detecting apparatus of claim 1, wherein: the control mechanism (18) comprises a storage battery (181), the storage battery (181) is fixed on the right side of the fixed frame (8), a connecting wire (182) is fixed at the top of the storage battery (181), and a second electrode plate (183) is fixed at the top of the connecting wire (182).
7. The concrete flatness detecting apparatus of claim 6, wherein: the bottom of second electrode plate (183) is fixed with connecting block (185), the bottom of connecting block (185) articulates there is movable rod (186), the one end that connecting block (185) were kept away from to movable rod (186) articulates at transfer line (187), the one end that movable rod (186) was kept away from to transfer line (187) is fixed with transfer line (189).
8. The concrete flatness detecting apparatus of claim 7, wherein: the bottom of second electrode plate (183) is fixed with coupling spring (184), the bottom of coupling spring (184) is fixed with fixed block (188), fixed block (188) are fixed in the right side of fixed frame (8).
9. The concrete flatness detecting apparatus of claim 1, wherein: the bottom of the fixed frame (8) is provided with a through hole (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310554267.4A CN116592798A (en) | 2023-05-17 | 2023-05-17 | Concrete roughness detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310554267.4A CN116592798A (en) | 2023-05-17 | 2023-05-17 | Concrete roughness detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116592798A true CN116592798A (en) | 2023-08-15 |
Family
ID=87607577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310554267.4A Pending CN116592798A (en) | 2023-05-17 | 2023-05-17 | Concrete roughness detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116592798A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117268317A (en) * | 2023-11-22 | 2023-12-22 | 成都大学 | Surface roughness measuring jig |
| CN118009933A (en) * | 2024-02-01 | 2024-05-10 | 中铁四局集团有限公司 | Flatness detection device for assembled precast concrete board after installation |
-
2023
- 2023-05-17 CN CN202310554267.4A patent/CN116592798A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117268317A (en) * | 2023-11-22 | 2023-12-22 | 成都大学 | Surface roughness measuring jig |
| CN117268317B (en) * | 2023-11-22 | 2024-02-02 | 成都大学 | Surface roughness measuring jig |
| CN118009933A (en) * | 2024-02-01 | 2024-05-10 | 中铁四局集团有限公司 | Flatness detection device for assembled precast concrete board after installation |
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