CN112902794A - Distance measuring device and method for building - Google Patents
Distance measuring device and method for building Download PDFInfo
- Publication number
- CN112902794A CN112902794A CN202110189348.XA CN202110189348A CN112902794A CN 112902794 A CN112902794 A CN 112902794A CN 202110189348 A CN202110189348 A CN 202110189348A CN 112902794 A CN112902794 A CN 112902794A
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- China
- Prior art keywords
- push rod
- rod
- range finder
- laser
- electric push
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- 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.)
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/02—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness
-
- 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
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/0002—Arrangements for supporting, fixing or guiding the measuring instrument or the object to be measured
- G01B5/0004—Supports
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/481—Constructional features, e.g. arrangements of optical elements
Abstract
A distance measuring device for buildings comprises a first electric push rod, a second electric push rod and a laser range finder, wherein the first electric push rod, the second electric push rod and the laser range finder are vertically arranged; a vertical rod is arranged above the first electric push rod, a vertical cavity is formed in the lower end of the vertical rod, the first push rod extends into the vertical cavity, and the first push rod is in clearance fit with the vertical cavity. The invention also discloses a measuring method using the distance measuring device for the building. Compared with the prior art, the laser range finder has the technical effects that the electric push rod is arranged, the horizontal height of the laser range finder can be adjusted, and two modes of laser range finding and mechanical range finding can be conveniently switched.
Description
Technical Field
The invention relates to a distance measuring device for buildings.
Background
At present, the building field often measures distance, and measuring tools mainly comprise a tape measure, a Laser rangefinder (Laser rangefinder) and the like.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: in practice, it is inconvenient for construction engineers to use.
The technical scheme of the invention is as follows:
a distance measuring device for buildings comprises a first electric push rod, a second electric push rod and a laser range finder, wherein the first electric push rod, the second electric push rod and the laser range finder are vertically arranged; a vertical rod is arranged above the first electric push rod, a vertical cavity is arranged at the lower end of the vertical rod, the first push rod extends into the vertical cavity, the first push rod is in clearance fit with the vertical cavity, the clearance is used for enabling the first push rod and the vertical rod to rotate along the axis of the first push rod, a first abutting nut is in threaded fit with the cavity wall of the vertical cavity, the first abutting nut is in surface contact with the first push rod, and the vertical rod can be fixed along the first push rod through the first abutting nut; two holding handles are fixed on the outer wall of the vertical rod; the laser range finder mount pad is fixed to the upper end of vertical pole, and laser range finder's below fixed mounting pole, the upper end of laser range finder mount pad are equipped with top open-ended open slot, and the installation pole is located this open slot, through round pin hub connection between laser range finder mount pad and the installation pole, and the mount pad can be rotatory along the round pin axle with the installation pole, and the tight nut is supported to the screw-thread fit second on the cell wall of open slot, and the second is supported tight nut and installation face and is contacted. The second abutting nut can be fixed between the laser range finder mounting seat and the mounting rod; the orientation of a laser emitting end of the laser range finder is vertical to the pin shaft; a connecting ring is fixed at the lower end of the second electric push rod, and a plurality of four supporting legs are fixed on the connecting ring; the fixed mechanical range finding dead lever of second push rod lower extreme, the below fixed axletree of mechanical range finding dead lever, the both ends of axletree all are equipped with the wheel, and one of them is the measuring wheel in these two wheels, and the side of measuring wheel is equipped with annular and accomodates the groove, receives the interior winding scale of line receipts.
The upper portion of vertical pole is fixed the display screen fixed plate, fixed display screen on the display screen fixed plate, and laser range finder's last fixed surface camera, display screen all connect the backstage server, and the camera lens direction of camera laser range finder's orientation is parallel.
The axial direction of the measuring wheel is fixed with the containing handle.
The supporting parts of the four supporting legs are four edges of a space regular quadrangular frustum.
The two gripping handles are symmetrical along the axis along which the vertical bar is located.
A measuring method using the distance measuring device for a building, comprising: when the system is used, firstly, a laser ranging mode is used, whether the data measured by the laser ranging mode is real or not is judged through a background server, and if yes, the measurement is finished; if not, measuring by using a mechanical distance measuring mode;
s, laser ranging
The second push rod for driving the second push rod to contract, so that the wheels are suspended, and the four support legs are supported on the ground;
the height of the laser range finder from the ground can be adjusted by adjusting the upward extending length of the first push rod of the first electric push rod; the first push rod and the vertical rod can rotate by rotating the two holding handles, and the laser emission direction of the laser range finder is adjusted; loosening the second abutting nut to enable the mounting rod to rotate along the pin shaft, so that the laser emission inclination angle of the laser range finder is adjusted; after the adjustment is finished, laser ranging is conveniently carried out;
s, mechanical distance measurement
The second push rod of the second push rod is driven to extend out, so that the wheel is supported on the ground, the measuring wheel is pressed at the starting end of the path to be measured, the holding handle is held by two hands to move the measuring wheel forward, and the measuring wheel is continuously pressed on the path to be measured in the moving process, so that when the measuring wheel is pressed at the ending end of the path to be measured, the reading of one graduated scale is the measuring distance; then, a second push rod driving the second push rod is contracted, the wheels are suspended, the four support legs are supported on the ground, and the containing handle is rotated manually, so that the measuring wheel rotates in the direction to drive the graduated scale to be contained in the containing groove;
the step of determining whether the data measured by the laser ranging method is real includes: after the laser ranging detection, the camera is opened, the camera shoots a picture of a measured point and transmits the picture to the background server, and the background server judges that the data is real according to whether a laser reflection point in the picture falls to the measured point position or not; and if the data is not true, the background server transmits the judgment result to the display screen.
Compared with the prior art, the laser range finder has the technical effects that the electric push rod is arranged, the horizontal height of the laser range finder can be adjusted, and two modes of laser range finding and mechanical range finding can be conveniently switched.
Drawings
FIG. 1 is a schematic diagram (one) of the present invention.
Fig. 2 is an enlarged schematic view of the upper end of fig. 1.
Fig. 3 is an enlarged schematic view of the lower end of fig. 1.
Fig. 4 is a right side schematic view (one) of the laser range finder.
Fig. 5 is a right side schematic view (two) of the laser range finder.
Fig. 6 is a schematic diagram of a state in which mechanical ranging is used.
Fig. 7 is a top view of a leg.
Fig. 8 is a schematic diagram (two) of the present invention.
Fig. 9 right side schematic view of the laser rangefinder (three).
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It is to be noted that, in the present invention, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.
When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present.
Furthermore, in the present invention, it should be understood that the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like, indicate orientations or positional relationships based on the orientation or positional relationships illustrated in the drawings, are only used for convenience in describing the present invention, and do not indicate or imply that the device or element so referred to must have this particular orientation, be configured to operate in a particular orientation, and thus should not be construed as limiting the present invention.
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments thereof.
Referring to fig. 1 to 7, a distance measuring device for buildings comprises a first electric push rod 10, a second electric push rod 20 and a laser distance measuring instrument 50 which are vertically arranged, wherein the ends of the first electric push rod 10 and the second electric push rod 20 are fixed together, the first electric push rod 10 is positioned on the first electric push rod 10, the first push rod 11 of the first electric push rod 10 extends upwards, and the second push rod 23 of the second electric push rod 20 extends downwards.
Referring to fig. 2, a vertical rod 30 is arranged above the first electric push rod 10, a vertical cavity 31 is arranged at the lower end of the vertical rod 30, the first push rod 11 extends into the vertical cavity 31, the first push rod 11 and the vertical cavity 31 are in clearance fit (see reference numeral 32 for clearance), the clearance is used for enabling the first push rod 11 and the vertical rod 30 to rotate along the axis of the first push rod 11, a first abutting nut 12 is in threaded fit on the cavity wall of the vertical cavity 31, and the first abutting nut 12 is in surface contact with the first push rod 11. The first clinch nut enables the vertical rod 30 to be secured along the first push rod 11.
Referring to fig. 2, the outer wall of the vertical rod 30 fixes two grip handles 33.
Referring to fig. 2, a laser range finder mounting seat 60 is fixed at the upper end of the vertical rod 30, a rod 52 is fixedly mounted below the laser range finder 50, an open slot with an upper opening is formed in the upper end of the laser range finder mounting seat 60, the mounting rod 52 is located in the open slot, the laser range finder mounting seat 60 is connected with the mounting rod 52 through a pin 61, the mounting seat 60 and the mounting rod 52 can rotate along the pin 61, a second tightening nut 62 is in threaded fit on the wall of the open slot, and the second tightening nut 62 is in surface contact with the mounting rod 52. The second jam nut 62 can be fixed between the laser range finder mounting base 60 and the mounting rod 52.
Referring to fig. 2, the laser emitting end 51 of the laser range finder 50 is oriented perpendicular to the pin 61.
Referring to fig. 3, the lower end of the second electric putter 20 is fixed with a connection ring 21, and the connection ring 21 is fixed with a plurality of four legs 22.
Referring to fig. 3 and 6, a mechanical distance measuring fixing rod 70 is fixed at the lower end of the second push rod 23, an axle 71 is fixed below the mechanical distance measuring fixing rod 70, wheels 72 are arranged at both ends of the axle 71, one of the two wheels 72 is a measuring wheel 73, an annular accommodating groove 74 is arranged on the side surface of the measuring wheel 73, and a scale is wound in the accommodating groove 74.
Referring to fig. 8 and 9, before use, in order to determine whether a laser ranging mode can be used, a display screen fixing plate 61 is fixed on the upper portion of the vertical rod 30, a display screen 60 is fixed on the display screen fixing plate 61, a CAMERA (CAMERA or WEBCAM)63 is fixed on the upper surface of the laser range finder 50, the CAMERA 63 is also called a computer CAMERA, a computer eye or an electronic eye, the CAMERA 63 and the display screen 60 are both connected with a background server (not shown in the figure), and the lens direction of the CAMERA 63 (see the arrow direction in fig. 9) is parallel to the direction of the laser emitting end 51 of the laser range finder 50.
For the convenience of housing the scale, the housing handle 75 is fixed in the axial direction of the measuring wheel 73.
For the purpose of stability, the support portions of the four legs 22 are the four edges of a spatial square frustum, see fig. 7.
For ease of gripping, the two gripping handles 33 are symmetrical along the axis along which the vertical rod 30 is located.
The working principle is as follows:
the invention can be switched between two modes of laser ranging and mechanical ranging.
When the system is used, firstly, a laser ranging mode is used, whether the data measured by the laser ranging mode is real or not is judged through a background server, and if yes, the measurement is finished; if not, the measurement is carried out by using a mechanical distance measuring mode.
S1 laser ranging
If the measured point of the distance measurement is relatively far, or relatively high, or an obstacle is in the middle, a laser distance meter can be adopted:
at this time, the second push rod 23 driving the second push rod 23 is contracted, the wheel 72 is suspended, and the four legs 22 are supported on the ground.
Firstly, the height of the laser range finder 50 from the ground can be adjusted by adjusting the upward extending length of the first push rod 11 of the first electric push rod 10.
Secondly, the first push rod 11 and the vertical rod 30 can rotate by rotating the two holding handles 33, so that the laser emission direction of the laser range finder 50 is adjusted, and if necessary, the laser range finder can be fastened through the first fastening nut 12.
Third, the second jam nut 62 is loosened, as shown in fig. 4-5, so that the mounting rod 52 is rotated along the pin 61, and the laser emitting inclination angle of the laser range finder 50 is adjusted.
After the adjustment is finished, the laser ranging is convenient to carry out.
S2, mechanical distance measurement
When the measured distance is not a straight line, a scale may be employed:
referring to fig. 1 and 6, at this time, the second push rod 23 driving the second push rod 23 is extended, the wheel 72 is supported on the ground, the measuring wheel 73 is pressed on the starting end of the path to be measured, the holding handle 33 is held by both hands, the present invention is moved forward, and the measuring wheel 73 is kept pressed on the path to be measured during the movement, so that when the measuring wheel 73 is pressed on the ending end of the path to be measured, the reading of one scale is the measuring distance.
Then, the second push rod 23 driving the second push rod 23 is retracted, the wheel 72 is suspended, the four legs 22 are supported on the ground, and the accommodating handle 75 is manually rotated to rotate the measuring wheel 73, so that the scale is accommodated in the accommodating groove 74.
The "determining whether the data measured by the laser ranging method is real" specifically includes: after the laser ranging detection, the camera 63 is turned on, the camera 63 shoots a picture of a measured point and transmits the picture to the background server, and the background server judges that the data is real according to whether a laser reflection point in the picture falls on the measured point position or not; if the data is not true in the case of 'no', the background server finally transmits the judgment result to the display screen 60.
See the prior art for additional details.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the overall concept of the present invention, and these should also be considered as the protection scope of the present invention.
Claims (6)
1. A distance measuring device for building which is characterized in that: the laser range finder comprises a first electric push rod (10), a second electric push rod (20) and a laser range finder (50), wherein the first electric push rod (10) and the second electric push rod (20) are vertically arranged, the end parts of the first electric push rod (10) and the second electric push rod (20) are fixed together, the first electric push rod (10) is positioned above the first electric push rod, a first push rod (11) of the first electric push rod (10) extends upwards, and a second push rod (23) of the second electric push rod (20) extends downwards;
a vertical rod (30) is arranged above the first electric push rod (10), a vertical cavity (31) is arranged at the lower end of the vertical rod (30), the first push rod (11) extends into the vertical cavity (31), the first push rod (11) is in clearance fit with the vertical cavity (31), the clearance is used for enabling the first push rod (11) and the vertical rod (30) to rotate along the axis of the first push rod (11), a first abutting nut (12) is in threaded fit with the wall of the vertical cavity (31), the first abutting nut (12) is in surface contact with the first push rod (11), and the first abutting nut can enable the vertical rod (30) to be fixed along the first push rod (11);
two holding handles (33) are fixed on the outer wall of the vertical rod (30);
a laser range finder mounting seat (60) is fixed at the upper end of the vertical rod (30), a mounting rod (52) is fixed below the laser range finder (50), an open slot with an upper opening is formed in the upper end of the laser range finder mounting seat (60), the mounting rod (52) is located in the open slot, the laser range finder mounting seat (60) is connected with the mounting rod (52) through a pin shaft (61), the mounting seat (60) and the mounting rod (52) can rotate along the pin shaft (61), a second abutting nut (62) is in threaded fit with the wall of the open slot, and the second abutting nut (62) is in surface contact with the mounting rod (52);
the second abutting nut (62) can be fixed between the laser range finder mounting seat (60) and the mounting rod (52);
the orientation of a laser emitting end (51) of the laser range finder (50) is vertical to the pin shaft (61);
a connecting ring (21) is fixed at the lower end of the second electric push rod (20), and a plurality of four supporting legs (22) are fixed on the connecting ring (21);
fixed mechanical range finding dead lever (70) of second push rod (23) lower extreme, fixed axletree (71) in the below of mechanical range finding dead lever (70), the both ends of axletree (71) all are equipped with wheel (72), one of them is measuring wheel (73) in these two wheels (72), and the side of measuring wheel (73) is equipped with annular and accomodates groove (74), receive and accomodate the interior winding scale of (74).
2. The distance measuring apparatus for construction according to claim 1, wherein: the display screen fixing plate (61) is fixed on the upper portion of the vertical rod (30), the display screen (60) is fixed on the display screen fixing plate (61), the camera (63) is fixed on the upper surface of the laser range finder (50), the camera (63) and the display screen (60) are both connected with the background server, and the directions of the laser emitting ends (51) of the laser range finder (50) in the lens direction of the camera (63) are parallel.
3. The distance measuring apparatus for construction according to claim 2, wherein: the axial direction of the measuring wheel (73) fixes the storage handle (75).
4. The distance measuring apparatus for construction according to claim 2, wherein: the supporting parts of the four supporting legs (22) are four edges of a space regular quadrangular frustum.
5. The distance measuring apparatus for construction according to claim 2, wherein: the two gripping handles (33) are symmetrical along the axis along which the vertical rod (30) is located.
6. A measuring method using the architectural distance measuring device of claim 2: the method is characterized in that:
when the system is used, firstly, a laser ranging mode is used, whether the data measured by the laser ranging mode is real or not is judged through a background server, and if yes, the measurement is finished; if not, measuring by using a mechanical distance measuring mode;
s1 laser ranging
The second push rod (23) driving the second push rod (23) contracts, so that the wheels (72) are suspended, and the four support legs (22) are supported on the ground;
the height of the laser range finder (50) from the ground can be adjusted by adjusting the upward extending length of the first push rod (11) of the first electric push rod (10);
the first push rod (11) and the vertical rod (30) can rotate by rotating the two holding handles (33), and the laser emission direction of the laser range finder (50) is adjusted;
loosening the second abutting nut (62) to enable the mounting rod (52) to rotate along the pin shaft (61), so that the laser emission inclination angle of the laser range finder (50) is adjusted;
after the adjustment is finished, performing laser ranging;
s2, mechanical distance measurement
The second push rod (23) of the second push rod (23) is driven to extend, the wheel (72) is supported on the ground, the measuring wheel (73) is pressed at the starting end of the path to be measured, the holding handle (33) is held by two hands to move the measuring device forward, and the measuring wheel (73) is kept continuously pressed on the path to be measured in the movement process, so that when the measuring wheel (73) is pressed at the ending end of the path to be measured, the reading of a graduated scale is taken as the measuring distance;
then, a second push rod (23) of the second push rod (23) is driven to contract, the wheel (72) is suspended, the four support legs (22) are supported on the ground, the accommodating handle (75) is rotated manually, the measuring wheel (73) is rotated in the direction, and the graduated scale is driven to be accommodated in the accommodating groove (74);
the step of determining whether the data measured by the laser ranging method is real includes: after the laser ranging detection, a camera (63) is opened, the camera (63) shoots a picture of a measured point and transmits the picture to a background server, and the background server judges that data is real by judging whether a laser reflection point in the picture falls to the measured point position or not if the laser reflection point in the picture is true; if the data is not true in the case of 'no', finally, the background server transmits the judgment result to a display screen (60).
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CN202110189348.XA CN112902794A (en) | 2021-02-19 | 2021-02-19 | Distance measuring device and method for building |
Applications Claiming Priority (1)
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CN202110189348.XA CN112902794A (en) | 2021-02-19 | 2021-02-19 | Distance measuring device and method for building |
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CN202110189348.XA Pending CN112902794A (en) | 2021-02-19 | 2021-02-19 | Distance measuring device and method for building |
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Cited By (2)
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CN113375638A (en) * | 2021-06-10 | 2021-09-10 | 青岛黄海学院 | Building engineering perpendicularity measuring instrument and using method |
CN116147454A (en) * | 2023-04-18 | 2023-05-23 | 平原县自然资源服务中心 | Auxiliary measuring tool for engineering management |
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CN206177245U (en) * | 2016-09-29 | 2017-05-17 | 深圳市迈测科技股份有限公司 | Electrooptical distance measuring device |
CN206818872U (en) * | 2017-04-19 | 2017-12-29 | 珠海码硕科技有限公司 | Rangefinder with roller function |
CN206919797U (en) * | 2017-07-25 | 2018-01-23 | 南通市市政工程设计院有限责任公司 | A kind of rolling chi being convenient for measuring |
US20180128588A1 (en) * | 2016-02-02 | 2018-05-10 | Northwest Instrument Inc. | Ranging system |
CN209310740U (en) * | 2018-12-26 | 2019-08-27 | 长泰县易捷房产信息咨询服务部 | A kind of real estate laser measuring equipment |
CN210426545U (en) * | 2019-04-18 | 2020-04-28 | 安徽宇捷电力工程设计有限公司 | Circuit reconnaissance equipment |
CN210603078U (en) * | 2019-11-15 | 2020-05-22 | 重庆兴宇工程建设监理有限公司 | Building engineering manages and uses range unit |
CN211504085U (en) * | 2019-11-06 | 2020-09-15 | 广东天人不动产测绘规划有限公司 | Laser measuring equipment for real estate |
CN212390930U (en) * | 2020-05-11 | 2021-01-22 | 青岛金源盛工程检测有限公司 | Construction area rapid measuring device for building detection |
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US20180128588A1 (en) * | 2016-02-02 | 2018-05-10 | Northwest Instrument Inc. | Ranging system |
CN206177245U (en) * | 2016-09-29 | 2017-05-17 | 深圳市迈测科技股份有限公司 | Electrooptical distance measuring device |
CN206818872U (en) * | 2017-04-19 | 2017-12-29 | 珠海码硕科技有限公司 | Rangefinder with roller function |
CN206919797U (en) * | 2017-07-25 | 2018-01-23 | 南通市市政工程设计院有限责任公司 | A kind of rolling chi being convenient for measuring |
CN209310740U (en) * | 2018-12-26 | 2019-08-27 | 长泰县易捷房产信息咨询服务部 | A kind of real estate laser measuring equipment |
CN210426545U (en) * | 2019-04-18 | 2020-04-28 | 安徽宇捷电力工程设计有限公司 | Circuit reconnaissance equipment |
CN211504085U (en) * | 2019-11-06 | 2020-09-15 | 广东天人不动产测绘规划有限公司 | Laser measuring equipment for real estate |
CN210603078U (en) * | 2019-11-15 | 2020-05-22 | 重庆兴宇工程建设监理有限公司 | Building engineering manages and uses range unit |
CN212390930U (en) * | 2020-05-11 | 2021-01-22 | 青岛金源盛工程检测有限公司 | Construction area rapid measuring device for building detection |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
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CN113375638A (en) * | 2021-06-10 | 2021-09-10 | 青岛黄海学院 | Building engineering perpendicularity measuring instrument and using method |
CN116147454A (en) * | 2023-04-18 | 2023-05-23 | 平原县自然资源服务中心 | Auxiliary measuring tool for engineering management |
CN116147454B (en) * | 2023-04-18 | 2023-06-27 | 平原县自然资源服务中心 | Auxiliary measuring tool for engineering management |
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