CN114279407B - Multifunctional laser level measuring instrument - Google Patents
Multifunctional laser level measuring instrument Download PDFInfo
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- CN114279407B CN114279407B CN202111617663.4A CN202111617663A CN114279407B CN 114279407 B CN114279407 B CN 114279407B CN 202111617663 A CN202111617663 A CN 202111617663A CN 114279407 B CN114279407 B CN 114279407B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E60/10—Energy storage using batteries
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Abstract
The invention relates to the technical field of measuring equipment, in particular to a multifunctional laser level measuring instrument; including rack, base, counterweight body, controller, rotating assembly, rolling disc and measuring apparatu body, at first place multi-functional laser level measuring apparatu subaerial, the gravity influence that receives through the counterweight body for the measuring apparatu body remains perpendicularly all the time, when the measuring direction of measuring apparatu body is unanimous with the measured object needs to be adjusted, start rotating assembly, drive the rolling disc and rotate on the base, distance between measuring device and the measured object through infrared ranging sensor, until the distance that surveys is minimum, indicate that the measuring direction of measuring apparatu body is unanimous with the measured object, adopt above-mentioned structure, the measuring direction that can the automatically regulated measuring apparatu body is unanimous with the measured object, do not need manual regulation, it is more convenient to operate.
Description
Technical Field
The invention relates to the technical field of measuring equipment, in particular to a multifunctional laser level measuring instrument.
Background
The level is a common tool for measuring small angles, is used for measuring an inclination angle relative to a horizontal position in the machining industry, and detecting the horizontal position and the vertical position of equipment assembly, and is a level, can measure more accurately and is usually used in building decoration.
However, most of the existing multifunctional laser horizontal measuring instruments are movably mounted on the support, the heights of the supporting legs are required to be manually adjusted, so that the measuring instrument body is kept vertical, the measuring instrument body is required to be manually rotated, the measuring direction of the adjusting instrument body is consistent with that of a measured object, and the operation is troublesome.
Disclosure of Invention
The invention aims to provide a multifunctional laser level measuring instrument, which solves the problems that most of the existing multifunctional laser level measuring instruments in the prior art are movably arranged on a bracket, the heights of supporting legs are required to be manually adjusted, so that a measuring instrument body is kept vertical, the measuring instrument body is required to be manually rotated, the measuring direction of the adjusting instrument body is consistent with that of a measured object, and the operation is troublesome.
In order to achieve the above purpose, the invention provides a multifunctional laser level measuring instrument, which comprises a placing frame, a base, a counterweight body, a controller, a rotating assembly, a rotating disc and a measuring instrument body, wherein one end of the placing frame far away from the ground is provided with two rotating shafts, the base is movably connected with the two rotating shafts, one end of the base close to the ground is provided with the counterweight body, one end of the base far away from the ground is provided with a groove, the rotating assembly is arranged in the groove, the side surface of the base is provided with the controller, and the rotating assembly is electrically connected with the controller;
the rotating disc is movably connected with the base and is located above the rotating assembly, a driven tooth part is arranged on one side, close to the groove, of the rotating disc, a measuring instrument body is arranged at one end, far away from the groove, of the rotating disc, the output end of the rotating assembly corresponds to the driven tooth part, an infrared ranging sensor is further arranged on the outer side of the rotating disc, and the infrared ranging sensor is electrically connected with the controller.
Firstly, the multifunctional laser horizontal measuring instrument is placed on the ground, as the base is movably connected with the placing frame, the weight body is arranged at the bottom of the base, the measuring instrument body is always vertical under the influence of gravity received by the weight body, when the measuring direction of the measuring instrument body is required to be regulated to be consistent with that of a measured object, the rotating assembly is started to drive the rotating disc to rotate on the base, the distance between the measuring device and the measured object is measured by the infrared ranging sensor until the distance measured by the infrared ranging sensor is the minimum, the measuring direction of the measuring instrument body is indicated to be corresponding to the measured object, so that the position of the measuring instrument body is regulated, and the measuring direction of the measuring instrument body is automatically regulated to be consistent with the measured object without manual regulation, so that the operation is more convenient.
The rotating assembly comprises a servo motor, a gear reduction box, an output shaft and an output gear, wherein the servo motor is detachably connected with the base and located in the groove, the output end of the servo motor is provided with the gear reduction box, the output end of the gear reduction box is provided with the output shaft, the output end of the output shaft is provided with the output gear, and the output gear is meshed with the driven tooth part.
After the output rotating speed of the servo motor is slowed down by the gear reduction box, the output gear is driven to rotate by the output shaft, and the output gear is meshed with the driven tooth part, so that the rotating disc is driven to rotate on the base, and the measuring direction of the measuring instrument body is adjusted.
The rotating assembly further comprises a storage battery, a battery groove is further formed in the base, the storage battery is located in the battery groove, and the storage battery is used for supplying power to the servo motor, the controller and the infrared ranging sensor.
The storage battery is arranged in the battery groove, and the servo motor, the controller and the infrared ranging sensor are powered by the storage battery.
The number of teeth of the output gear is smaller than that of the driven gear, and heat dissipation grooves are formed in two sides of the base and correspond to the servo motor.
The number of teeth of the output gear is smaller than that of the driven gear part, and the output rotating speed of the output gear is further reduced through the driven gear part, so that the rotation angle of the measuring instrument body is more convenient to adjust.
The counterweight body comprises a fixing plate, a guy rope and a counterweight ball, one side of the fixing plate is connected with the bottom of the base in a detachable mode, a first hanging ring is arranged on the other side of the fixing plate, a second hanging ring is arranged on the counterweight ball, a first hanging hook is arranged at one end of the guy rope, a second hanging hook is arranged at the other end of the guy rope, the first hanging hook is matched with the first hanging ring, and the second hanging hook is matched with the second hanging ring.
When the counterweight body is installed, the fixing plate is fixed at the bottom of the base by utilizing the screw, the first hook is hung on the first hanging ring, so that the installation of the inhaul cable is completed, the second hook is hung on the second hanging ring, the installation of the counterweight ball is completed, and the measuring instrument body on the base always maintains a vertical state under the influence of gravity received by the counterweight ball.
Wherein, the rack includes bottom plate, a plurality of stabilizer blade and collar, be provided with two on the collar the axis of rotation, the lateral wall of collar still is provided with a plurality of first installing frames, one side that the ground was kept away from to the bottom plate evenly is provided with a plurality of second installing frames, every first installing frame with correspond all be provided with between the second installing frame the stabilizer blade, the one end of stabilizer blade with correspond first installing frame dismantles to be connected, the other end of stabilizer blade with correspond second installing frame dismantles to be connected, one side that the ground was kept away from to the bottom plate still is provided with a plurality of receiver, and every receiver all is used for accomodating measuring tool.
Utilize the screw with a plurality of the stabilizer blade is installed corresponding first installing frame with between the second installing frame, thereby accomplish the installation of rack one side that the bottom plate kept away from ground sets up a plurality of the receiver, every the receiver all is used for accomodating measuring tool, makes multifunctional laser level measuring apparatu still possesses the function of accomodating except possessing level measurement's function, and the functionality is stronger.
The multifunctional laser horizontal measuring instrument comprises a placing frame, a base, a counterweight body, a controller, a rotating assembly, a rotating disc and a measuring instrument body, wherein the multifunctional laser horizontal measuring instrument is placed on the ground, the measuring instrument body is always vertical under the influence of gravity received by the counterweight body, when the measuring direction of the measuring instrument body is required to be regulated to be consistent with that of a measured object, the rotating assembly is started to drive the rotating disc to rotate on the base, the distance between a device and the measured object is measured through an infrared ranging sensor, and the measuring direction of the measuring instrument body corresponds to the measured object until the distance measured by the infrared ranging sensor is the smallest, so that the position regulation of the measuring instrument body is completed.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a multifunctional laser level meter provided by the invention.
Fig. 2 is an enlarged view of a partial structure at a of fig. 1 provided by the present invention.
Fig. 3 is a schematic view of a part of the structure of the multifunctional laser level meter provided by the invention.
Fig. 4 is a cross-sectional view of the internal structure of the line B-B of fig. 3 provided by the present invention.
Fig. 5 is an enlarged view of a part of the structure at C of fig. 3 provided by the present invention.
Fig. 6 is a schematic diagram of a split structure of a part of the structure of the multifunctional laser level meter provided by the invention.
Fig. 7 is an enlarged view of a part of the structure at D of fig. 6 provided by the present invention.
1-rack, 2-base, 3-counterweight body, 4-controller, 5-rotating assembly, 6-rotating disk, 7-measuring instrument body, 8-rotating shaft, 9-groove, 10-driven tooth, 11-infrared ranging sensor, 12-servo motor, 13-gear reduction box, 14-output shaft, 15-output gear, 16-battery, 17-battery jar, 18-heat sink, 19-fixed plate, 20-guy cable, 21-counterweight ball, 22-first hanging ring, 23-second hanging ring, 24-first hanger, 25-second hanger, 26-base plate, 27-support leg, 28-mounting ring, 29-first mounting frame, 30-second mounting frame, 31-storage box, 32-base, 33-rotating block, 34-rotating groove, 35-shaft, 36-rotating handle, 37-threaded hole, 38-threads, 39-disk, 40-ring body, 41-limiting plate, 42-limiting ring, 43-fixing hole, 44-fixing bolt.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
In the description of the present invention, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, in the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
Referring to fig. 1 to 7, the present invention provides a multifunctional laser level measuring apparatus, which includes a placing frame 1, a base 2, a counterweight body 3, a controller 4, a rotating assembly 5, a rotating disc 6 and a measuring apparatus body 7, wherein one end of the placing frame 1 far away from the ground is provided with two rotating shafts 8, the base 2 is movably connected with the two rotating shafts 8, one end of the base 2 near the ground is provided with the counterweight body 3, one end of the base 2 far away from the ground is provided with a groove 9, the rotating assembly 5 is arranged in the groove 9, the side surface of the base 2 is provided with the controller 4, and the rotating assembly 5 is electrically connected with the controller 4;
the rotating disc 6 is movably connected with the base 2 and is located above the rotating assembly 5, a driven tooth part 10 is arranged on one side, close to the groove 9, of the rotating disc 6, a measuring instrument body 7 is arranged at one end, far away from the groove 9, of the rotating disc 6, an output end of the rotating assembly 5 corresponds to the driven tooth part 10, an infrared ranging sensor 11 is further arranged on the outer side of the rotating disc 6, and the infrared ranging sensor 11 is electrically connected with the controller 4.
In this embodiment, firstly, the multifunctional laser level measuring apparatus is placed on the ground, because the base 2 is movably connected with the placing frame 1, the bottom of the base 2 is provided with the counterweight body 3, the measuring apparatus body 7 is always kept vertical under the influence of gravity received by the counterweight body 3, when the measuring direction of the measuring apparatus body 7 needs to be adjusted to be consistent with the measured object, the rotating assembly 5 is started to drive the rotating disc 6 to rotate forward on the base 2, the distance between the measuring apparatus and the measured object is measured by the infrared ranging sensor 11, when the measured distance is in a trend of increasing, the rotating assembly 5 is reversely output, so as to drive the rotating disc 6 to reversely rotate on the base 2 until the measured distance of the infrared ranging sensor 11 is the minimum, when the measured distance is in a trend of decreasing, the rotating assembly 5 continuously outputs forward, when the measured distance of the infrared ranging sensor 11 is the minimum, the rotating assembly 5 stops to automatically rotate, and the measuring apparatus body 7 is not required to be adjusted to be in the measuring direction, thereby adjusting the measuring apparatus body 7, and the measuring apparatus is not required to be adjusted to be more convenient to be operated.
Further, the rotating assembly 5 includes a servo motor 12, a gear reduction box 13, an output shaft 14 and an output gear 15, the servo motor 12 is detachably connected with the base 2 and located inside the groove 9, an output end of the servo motor 12 is provided with the gear reduction box 13, an output end of the gear reduction box 13 is provided with the output shaft 14, an output end of the output shaft 14 is provided with the output gear 15, and the output gear 15 is meshed with the driven tooth portion 10.
In this embodiment, after the servo motor 12 is started and the output rotation speed of the servo motor 12 is slowed down by the gear reduction box 13, the output gear 15 is driven to rotate by the output shaft 14, and the output gear 15 is meshed with the driven gear 10, so that the rotating disc 6 is driven to rotate on the base 2, thereby adjusting the measurement direction of the measuring instrument body 7.
Further, the rotating assembly 5 further comprises a battery 16, a battery groove 17 is further formed in the base 2, the battery 16 is located in the battery groove 17, and the battery 16 is used for supplying power to the servo motor 12, the controller 4 and the infrared ranging sensor 11.
In the present embodiment, the storage battery 16 is provided in the battery case 17, and the servo motor 12, the controller 4, and the infrared distance measuring sensor 11 are supplied with power by the storage battery 16.
Further, the number of teeth of the output gear 15 is smaller than the number of teeth of the driven gear 10, and heat dissipation grooves 18 are further formed on two sides of the base 2, and the heat dissipation grooves 18 correspond to the servo motor 12.
In this embodiment, the number of teeth of the output gear 15 is smaller than the number of teeth of the driven gear 10, and the output rotation speed of the output gear 15 is further reduced by the driven gear 10, so that it is more convenient to adjust the rotation angle of the measuring instrument body 7.
Further, the counterweight body 3 includes fixed plate 19, cable 20 and counterweight ball 21, one side of fixed plate 19 with the bottom of base 2 is dismantled and is connected, the opposite side of fixed plate 19 is provided with first link 22, be provided with second link 23 on the counterweight ball 21, the one end of cable 20 is provided with first couple 24, the other end of cable 20 is provided with second couple 25, first couple 24 with first link 22 looks adaptation, second couple 25 with second link 23 looks adaptation.
In this embodiment, when the weight body 3 is mounted, the fixing plate 19 is first fixed to the bottom of the base 2 by using a screw, the first hook 24 is hung on the first hanging ring 22, so that the installation of the cable 20 is completed, the second hook 25 is hung on the second hanging ring 23, so that the installation of the weight ball 21 is completed, and the weight force applied to the weight ball 21 affects the measuring instrument body 7 on the base 2, so that the measuring instrument body 7 always maintains a vertical state.
Further, the rack 1 includes bottom plate 26, a plurality of stabilizer blade 27 and collar 28, be provided with two on the collar 28 the axis of rotation 8, the lateral wall of collar 28 still is provided with a plurality of first installing frame 29, one side that the ground was kept away from to the bottom plate 26 evenly is provided with a plurality of second installing frame 30, every all be provided with between first installing frame 29 and the corresponding second installing frame 30 stabilizer blade 27, the one end of stabilizer blade 27 with the corresponding first installing frame 29 dismantles to be connected, the other end of stabilizer blade 27 with the corresponding second installing frame 30 dismantles to be connected, one side that the ground was kept away from to the bottom plate 26 still is provided with a plurality of receiver 31, and every receiver 31 all is used for accomodating measuring tool.
In the present embodiment, the plurality of legs 27 are mounted between the corresponding first mounting frame 29 and second mounting frame 30 by screws, so that the mounting of the rack 1 is completed, and the plurality of storage boxes 31 are provided on the side of the bottom plate 26 away from the ground, and each storage box 31 is used for storing a measuring tool, so that the multifunctional laser level measuring instrument has a storage function in addition to a level measuring function, and has a higher functionality.
Further, the base 2 includes a base 32 and two rotating blocks 33, the rotating blocks 33 are disposed on two sides of the base 32, a rotating groove 34 is disposed on each rotating block 33, and each rotating shaft 8 corresponds to one rotating groove 34.
In this embodiment, the two sides of the base 32 are respectively provided with the rotating blocks 33, and each rotating shaft 8 corresponds to one rotating groove 34, so that the base 2 is movably connected with the placement frame 1.
Further, the two rotating shafts 8 each comprise a shaft body 35 and a rotating handle 36, threaded holes 37 are formed in two sides of the mounting ring 28, one end of the shaft body 35 is provided with the rotating handle 36, the other end of the shaft body 35 is matched with the rotating groove 34, one end, close to the rotating handle 36, of the shaft body 35 is provided with threads 38, and the threads 38 are matched with the threaded holes 37.
In this embodiment, when the base 2 is mounted, the base 2 is first placed in the middle of the mounting ring 28, so that each of the rotating grooves 34 is respectively matched with one of the threaded holes 37, the rotating handle 36 is rotated to be screwed into the shaft body 35, and then one end of the shaft body 35, which is far from the rotating handle 36, is inserted into the corresponding rotating groove 34, thereby completing the mounting of the base 2.
Further, the rotating disc 6 includes a disc body 39, a ring body 40 and a limiting plate 41, one end of the base 2 far away from the counterweight body 3 is provided with a limiting ring 42, the ring body 40 is fixedly connected with the disc body 39 and is located below the disc body 39, the driven tooth portion 10 is arranged on the inner side wall of the ring body 40, the limiting plate 41 is sleeved outside the base 2 and is located below the limiting plate 41, the disc body 39 and the limiting plate 41 are both eccentrically provided with a plurality of fixing holes 43, and fixing bolts 44 are respectively arranged on each two corresponding fixing holes 43.
In this embodiment, the limiting ring 42 is sleeved below the limiting ring 42 from the bottom of the base 2, the disc 39 is placed above the base 2, so that after the ring body 40 is located at the port of the groove 9, the disc 39 and the limiting plate 41 are fixed by the fixing bolt 44, so that the rotating disc 6 is mounted, the rotating disc 6 is movably connected with the base 2, and the rotating disc 6 and the base 2 cannot fall off when the multifunctional laser level measuring instrument is carried.
The above disclosure is only a preferred embodiment of the present invention, and it should be understood that the scope of the invention is not limited thereto, and those skilled in the art will appreciate that all or part of the procedures described above can be performed according to the equivalent changes of the claims, and still fall within the scope of the present invention.
Claims (5)
1. A multifunctional laser level measuring instrument is characterized in that,
the multifunctional laser level measuring instrument comprises a placing rack, a base, a counterweight body, a controller, a rotating assembly, a rotating disc and a measuring instrument body, wherein two rotating shafts are arranged at one end, far away from the ground, of the placing rack, the base is movably connected with the two rotating shafts, the counterweight body is arranged at one end, close to the ground, of the base, a groove is formed at one end, far away from the ground, of the base, the rotating assembly is arranged in the groove, the controller is arranged on the side face of the base, and the rotating assembly is electrically connected with the controller;
the rotary disc is movably connected with the base and is positioned above the rotary assembly, a driven tooth part is arranged on one side, close to the groove, of the rotary disc, the measuring instrument body is arranged at one end, far away from the groove, of the rotary disc, the output end of the rotary assembly corresponds to the driven tooth part, an infrared ranging sensor is further arranged on the outer side of the rotary disc, and the infrared ranging sensor is electrically connected with the controller;
the rotating assembly comprises a servo motor, a gear reduction box, an output shaft and an output gear, wherein the servo motor is detachably connected with the base and is positioned in the groove, the gear reduction box is arranged at the output end of the servo motor, the output shaft is arranged at the output end of the gear reduction box, the output gear is arranged at the output end of the output shaft, and the output gear is meshed with the driven tooth part;
the rotating disc comprises a disc body, a ring body and a limiting plate, wherein a limiting ring is arranged at one end, far away from the counterweight body, of the base, the ring body is fixedly connected with the disc body and located below the disc body, driven tooth parts are arranged on the inner side wall of the ring body, the limiting plate is sleeved outside the base and located below the limiting plate, a plurality of fixing holes are eccentrically arranged on the disc body and the limiting plate, and fixing bolts are arranged on each two corresponding fixing holes.
2. The multifunctional laser level meter of claim 1, wherein,
the rotating assembly further comprises a storage battery, a battery groove is further formed in the base, the storage battery is located in the battery groove, and the storage battery is used for supplying power to the servo motor, the controller and the infrared ranging sensor.
3. The multifunctional laser level meter of claim 1, wherein,
the number of teeth of the output gear is smaller than that of the driven gear part, and heat dissipation grooves are formed in two sides of the base and correspond to the servo motor.
4. The multifunctional laser level meter of claim 1, wherein,
the counterweight body comprises a fixing plate, a guy rope and a counterweight ball, one side of the fixing plate is connected with the bottom of the base in a detachable mode, a first hanging ring is arranged on the other side of the fixing plate, a second hanging ring is arranged on the counterweight ball, a first hanging hook is arranged at one end of the guy rope, a second hanging hook is arranged at the other end of the guy rope, the first hanging hook is matched with the first hanging ring, and the second hanging hook is matched with the second hanging ring.
5. The multifunctional laser level meter of claim 1, wherein,
the rack includes bottom plate, a plurality of stabilizer blade and collar, be provided with two on the collar the axis of rotation, the lateral wall of collar still is provided with a plurality of first installing frame, one side that the ground was kept away from to the bottom plate evenly is provided with a plurality of second installing frames, every first installing frame with correspond all be provided with between the second installing frame the stabilizer blade, the one end of stabilizer blade with correspond first installing frame dismantles to be connected, the other end of stabilizer blade with correspond the second installing frame dismantles to be connected, one side that the ground was kept away from to the bottom plate still is provided with a plurality of receiver, and every receiver all is used for accomodating measuring tool.
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| CN202111617663.4A CN114279407B (en) | 2021-12-27 | 2021-12-27 | Multifunctional laser level measuring instrument |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111617663.4A CN114279407B (en) | 2021-12-27 | 2021-12-27 | Multifunctional laser level measuring instrument |
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| CN114279407A CN114279407A (en) | 2022-04-05 |
| CN114279407B true CN114279407B (en) | 2023-07-25 |
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| CN114871837A (en) * | 2022-05-24 | 2022-08-09 | 江苏铝技精密机械有限公司 | Waterwheel type combined machining equipment |
| CN118442994A (en) * | 2024-07-08 | 2024-08-06 | 福建福大建筑规划设计研究院有限公司 | Dynamic monitoring and analyzing device for implementation of homeland space planning |
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| JP6775342B2 (en) * | 2016-07-19 | 2020-10-28 | 株式会社トプコン | Laser remote length measuring device |
| CN210773935U (en) * | 2019-12-13 | 2020-06-16 | 东北大学 | Mining three-dimensional laser digital measuring instrument |
| WO2021187650A1 (en) * | 2020-03-20 | 2021-09-23 | 김진형 | Long-range measuring instrument optical sensor focally-aligned by jigs, long-range measuring instrument comprising same, and method for manufacturing same |
| CN111830520B (en) * | 2020-07-09 | 2023-08-04 | 广东诚浩工程项目管理有限公司 | Engineering construction supervision quality acceptance actual measurement device and method |
| CN111750843A (en) * | 2020-08-06 | 2020-10-09 | 连云港职业技术学院 | Measuring device for municipal engineering and using method thereof |
| CN212300359U (en) * | 2020-08-06 | 2021-01-05 | 连云港职业技术学院 | Measuring device that municipal works were used |
| CN215173729U (en) * | 2021-01-28 | 2021-12-14 | 成都建工第九建筑工程有限公司 | GPS-RTK measuring apparatu that can automatic leveling |
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