CN107588757A - A kind of laser detector of rod-like articles perpendicularity - Google Patents
A kind of laser detector of rod-like articles perpendicularity Download PDFInfo
- Publication number
- CN107588757A CN107588757A CN201710951159.5A CN201710951159A CN107588757A CN 107588757 A CN107588757 A CN 107588757A CN 201710951159 A CN201710951159 A CN 201710951159A CN 107588757 A CN107588757 A CN 107588757A
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- China
- Prior art keywords
- support bar
- rotating shaft
- rod
- fixedly connected
- chute
- 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.)
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Abstract
The invention discloses a kind of laser detector of rod-like articles perpendicularity, including fix bar, the side of the fix bar is fixedly connected with the collar and lower collar, the side of the upper collar and lower collar away from fix bar is threaded with fixing bolt, the one side of the fix bar opens up fluted, the inwall of the groove is plugged with first rotating shaft and the second rotating shaft, the surface of the first rotating shaft is fixedly connected with first support bar, the surface of second rotating shaft is fixedly connected with second support bar, and the side of the first support bar offers the first chute.The present invention launches laser straight up by generating laser, laser leaves luminous point on the surface of graduated scale, the skew reading of luminous point is read by the position of luminous point on the scale, so that user goes out the perpendicularity of the body of rod to be measured according to the distance computation between the reading and first rotating shaft of skew and the second rotating shaft, consequently facilitating the angle of the adjustment body of rod, simple and easy to use.
Description
Technical field
The present invention relates to technical field of laser detection, specially a kind of laser detector of rod-like articles perpendicularity.
Background technology
Laser measuring technology such as laser interference length-measuring, laser ranging, vibration measurement with laser, laser velocimeter, is swashed using quite varied
Light speckle measurement, laser alignment, laser hologram, laser scanning, laser tracking, laser spectral analysis etc. all show laser measurement
Huge superiority.Laser heterodyne interference is the important technology of nano measurement.Laser measurement is a kind of non-contact measurement, not shadow
The motion of testee is rung, precision is high, measurement range is big, detection time is short, has very high spatial resolution.
The application of laser detection is quite varied, very convenient using laser detection in the detection of object perpendicularity, hangs down
Straight degree is to represent that element to be measured relative to reference element, keeps correct 90 ° of angle situations on part.It is namely usually said
Orthogonal degree is kept between two key elements.Perpendicularity is form tolerance, and squareness tolerance is：The actual direction of element to be measured, it is right
Between the perpendicular ideal orientation of benchmark, the maximum variation that is allowed.Namely provided on pattern, it is tested to limit
Actual feature offset from perpendicular, the maximum mobility scale allowed, the key element of perpendicularity are generally straight line and plane.Benchmark will
Element is generally plane, naturally it is also possible to is straight line.Perpendicularity evaluation straight line between, between plane or between straight line and plane hang down
Straight state.One of straight line or plane are metewands, and straight line can be the straight line portion or linear motion of sample,
Plane can be the plane that the planar section of sample or movement locus are formed, and the measuring method of perpendicularity has a lot.Market
The upper verticality measuring instrument for also having special measurement perpendicularity.But the tolerance for seeing workpiece requirement is how many, if the margin of tolerance
If very little, in general measuring instrument may not measure not come out.So suggest squareness tolerance within 0.05, or with sharp
Optical measuring instrument is just guaranteed to measure.
It is very huge to be used to measure the laser detector volume of article perpendicularity in the market, and laser detection fills
More precision is put, cost is higher, and as the use of instrument, the life-span of instrument can also gradually decrease, and instrument can be deposited
In the danger of damage, and can extremely be wasted using so accurate instrument when some simple objects carry out squareness measurement,
On the other hand, cost can not only be reduced by providing a kind of laser detector of convenient type, while it can also improve operating efficiency.
The content of the invention
(1) technical problem solved
In view of the shortcomings of the prior art, the invention provides a kind of laser detector of rod-like articles perpendicularity, solve
The problem of laser detector of in the market is complex, and cost is higher.
(2) technical scheme
To achieve the above object, the present invention provides following technical scheme：A kind of laser detection dress of rod-like articles perpendicularity
Put, including fix bar, the side of the fix bar are fixedly connected with the collar and lower collar, the upper collar and lower collar are remote
The side of fix bar is threaded with fixing bolt, and the one side of the fix bar opens up fluted, the inwall of the groove
First rotating shaft and the second rotating shaft are plugged with, the surface of the first rotating shaft is fixedly connected with first support bar, second rotating shaft
Surface be fixedly connected with second support bar, the side of the first support bar offers the first chute, in first chute
The first sliding block is connected with, the surface of first sliding block is plugged with the 3rd rotating shaft, and the surface of the fix bar is plugged with the 4th turn
Axle, the 3rd rotating shaft are flexibly connected with the 4th rotating shaft by first connecting rod, and the front of the first support bar is fixedly connected with
First rolling bearing units, the first screw rod are plugged with first rolling bearing units, the upper surface of first sliding block is fixedly connected with
First rack rails, first rack rails engage with the first screw rod, and the surface of the second support bar offers the second chute, and described
The second sliding block is connected with two chutes, the surface of second sliding block is plugged with the 5th rotating shaft, the positive grafting of the fix bar
There is the 6th rotating shaft, the 5th rotating shaft is flexibly connected with the 6th rotating shaft by second connecting rod, and the front of the second support bar is consolidated
Surely the second rolling bearing units are connected with, the second screw rod is plugged with second rolling bearing units, the upper surface of second sliding block is consolidated
Surely the second rack rails is connected with, second rack rails engages with the second screw rod, solid in the first support bar and second support bar
Surely be connected with horizontal bubble instrument, the lower surface of the first support bar is fixedly connected with graduated scale, the second support bar it is upper
Surface is fixedly connected with generating laser.
Preferably, the upper collar is identical with the shapes and sizes of lower collar, and the upper collar and lower collar are with fix bar
Center line is symmetrical arranged for line of symmetry.
Preferably, first chute and the second chute are shaped as T-shaped, the shape of first sliding block and the second sliding block
It is consistent with the shape of the first chute and the second chute.
Preferably, the described one end of first screw rod and the second screw rod away from fix bar has been fixedly connected with regulation handle.
Preferably, the precision of the graduated scale is millimeter, and the center of the graduated scale is zero graduation, and the graduated scale is with zero
Scale is that midpoint is symmetrically arranged with positive and negative scale.
Preferably, the equal length of the first support bar and second support bar, and first support bar is positioned at the second support
The surface of bar.
Preferably, the lower surface of the generating laser face graduated scale, and generating laser is located at second support bar
Centre.
Preferably, the shape of the upper sliding sleeve and low sleeve is polygon prism, and upper sliding sleeve and low sleeve are preferably positive four
Prism.
(3) beneficial effect
The invention provides a kind of laser detector of rod-like articles perpendicularity.Possesses following beneficial effect：
(1), the present invention is by setting fix bar, upper fixed cover, lower fixed cover and fixing bolt, by by upper fixed cover and
Lower fixed cover is socketed on the body of rod to be measured, passes through rotary fixing screw bolt so that one end of fixing bolt and the surface of the body of rod to be measured
Only paste, so as to which fix bar is fixed on the body of rod to be measured, while above fixed cover and lower fixed cover are jointly fixed so that fix bar
Install smooth, be fixed with fixing bolt so that it is simple to operate, it is easy for installation.
(2), the present invention launches laser straight up by generating laser, and laser leaves luminous point on the surface of graduated scale,
The skew reading of luminous point is read by luminous point position on the scale, so that user is according to the reading of skew and the
Distance computation between one rotating shaft and the second rotating shaft goes out the perpendicularity of the body of rod to be measured, consequently facilitating the angle of the adjustment body of rod, is used
It is convenient and simple.
(3), the present invention is by setting the first chute, the first sliding block, the 3rd rotating shaft, the 4th rotating shaft, first connecting rod, first band
Seat bearing, the first screw rod and the first rack rails, when rotate regulation handle, drive the rotation of the first screw rod, the first screw rod rotate so that
So that the screw thread on the first screw rod produces motive force to the first rack rails, the first rack rails drives the first rack rails horizontal in the presence of thrust
To movement, so as to the first sliding block in the first chute it is movable, when the first sliding block slides, pass through the impetus of connecting rod the
One support bar rotates around first rotating shaft, so as to change the angle of first support bar, so as to by changing first support bar
Angle so that first support bar keep level, debugging in the same way can cause second support bar also to keep water
Flat, operating method is simple, and adjustment is accurate.
(4), the present invention is by setting horizontal bubble instrument intuitively to find out whether are first support bar and second support bar
Keep level state, consequently facilitating adjustment is carried out to first support bar and second support bar, when the water of regulation to horizontal bubble instrument
Ensure that first support bar and second support bar are horizontal when flat bubble is placed in the middle, so that measurement result is accurate.
(5), the present invention is by setting generating laser and graduated scale, so that the light of the transmitting of generating laser erects
Straight irradiation on the scale, so as to accurately measure the water of first support bar and second support bar in vertical spacing
Flat deviant, and then the effect of measurement body of rod perpendicularity, it is practical simple and convenient.
Brief description of the drawings
Fig. 1 is the structural representation of front view of the present invention；
Fig. 2 is the structural representation of fix bar side view of the present invention.
In figure：1 fix bar, the collar, 3 lower collars, 4 fixing bolts, 5 grooves, 6 first rotating shafts, 7 second rotating shafts, 8 on 2
One support bar, 9 second support bars, 10 first chutes, 11 first sliding blocks, 12 the 3rd rotating shafts, 13 the 4th rotating shafts, 14 first connecting rods,
15 first rolling bearing units, 16 first screw rods, 17 first rack rails, 18 second chutes, 19 second sliding blocks, 20 the 5th rotating shafts, 21 the 6th
Rotating shaft, 22 second connecting rods, 23 second rolling bearing units, 24 second screw rods, 25 second rack rails, 26 horizontal bubble instrument, 27 graduated scales, 28
Generating laser, 29 regulation handles.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
As shown in Figure 1-2, the present invention provides a kind of technical scheme：A kind of laser detector of rod-like articles perpendicularity,
Including fix bar 1, the side of fix bar 1 is fixedly connected with the collar 2 and lower collar 3, the shape of the upper collar 2 and lower collar 3 and
Size is identical, and the upper collar 2 is symmetrical arranged with lower collar 3 using the center line of fix bar 1 as line of symmetry, upper sliding sleeve 2 and low sleeve 3
Shape is polygon prism, and upper sliding sleeve 2 and low sleeve 3 are preferably four-prism, and the upper collar 2 and lower collar 3 are away from fix bar 1
Side is threaded with fixing bolt 4, and the one side of fix bar 1 opens up fluted 5, and the inwall of groove 5 is plugged with first turn
The rotating shaft 7 of axle 6 and second, the surface of first rotating shaft 6 are fixedly connected with first support bar 8, and the surface of the second rotating shaft 7 is fixedly connected with
The equal length of second support bar 9, first support bar 8 and second support bar 9, and first support bar 8 is located at second support bar 9
Surface, the side of first support bar 8 offer the first chute 10, and the first sliding block 11 is connected with the first chute 10, and first slides
The surface of block 11 is plugged with the 3rd rotating shaft 12, and the surface of fix bar 1 is plugged with the 4th rotating shaft 13, the 3rd rotating shaft 12 and the 4th rotating shaft
13 are flexibly connected by first connecting rod 14, and the front of first support bar 8 is fixedly connected with the first rolling bearing units 15, and first ushers to seat axle
Hold and the first screw rod 16 is plugged with 15, the upper surface of the first sliding block 11 is fixedly connected with the first rack rails 17, the first rack rails 17 and
One screw rod 16 engages, and the surface of second support bar 9 offers the second chute 18, and the second sliding block 19 is connected with the second chute 18,
First chute 10 and the second chute 18 are shaped as T-shaped, the shape of the first sliding block 11 and the second sliding block 19 and the first chute 10 and
The shape of second chute 18 is consistent, and the surface of the second sliding block 19 is plugged with the 5th rotating shaft 20, and the front of fix bar 1 is plugged with the 6th
Rotating shaft 21, the 5th rotating shaft 20 are flexibly connected with the 6th rotating shaft 21 by second connecting rod 22, and the front of second support bar 9 is fixedly connected
There are the second rolling bearing units 23, the second screw rod 24 is plugged with the second rolling bearing units 23, the first screw rod 16 and the second screw rod 24 are remote
One end of fix bar 1 has been fixedly connected with regulation handle 29, and the upper surface of the second sliding block 19 is fixedly connected with the second rack rails 25, the
Two rack rails 25 are engaged with the second screw rod 24, and horizontal bubble instrument 26 has been fixedly connected with first support bar 8 and second support bar 9,
The lower surface of first support bar 8 is fixedly connected with graduated scale 27, and the precision of graduated scale 27 is millimeter, and the center of graduated scale 27 is zero
Scale, graduated scale 27 are symmetrically arranged with positive and negative scale using zero graduation as midpoint, and the upper surface of second support bar 9 is fixedly connected with sharp
Optical transmitting set 28, the lower surface of the face graduated scale 27 of generating laser 28, and generating laser 28 is being located at second support bar 9 just
Center.
In use, upper fixed cover 2 and lower fixed cover 3 are socketed on the body of rod to be measured, pass through rotary fixing screw bolt 4 so that
One end of fixing bolt 4 and the surface of the body of rod to be measured are only pasted, so as to which fix bar 1 is fixed on the body of rod to be measured, and meanwhile it is solid above
Surely set 2 and lower fixed cover 3 it is jointly fixed that fix bar 1 is installed is smooth, be fixed with fixing bolt 4, rotate regulation handle
When 29, the first screw rod 16 is driven to rotate, the first screw rod 16 rotates so that the screw thread on the first screw rod 16 is to the first rack rails 17
Motive force is produced, the first rack rails 17 drives the transverse shifting of the first rack rails 17 in the presence of thrust, so as to which the first sliding block 11 is the
It is movable in one chute 10, when the first sliding block 11 slides, first is surrounded by the impetus first support bar 14 of connecting rod
Rotating shaft 5 rotates, so as to change the angle of first support bar 8, by setting horizontal bubble instrument 26 intuitively to find out first
Strut 8 and second support bar 9 whether keep level state, consequently facilitating being adjusted to first support bar 8 and second support bar 9
School, ensure that first support bar 8 and second support bar 9 are horizontal when the horizontal bubble of regulation to horizontal bubble instrument 26 is placed in the middle, with same
The method debugging of sample can cause the also keep level of second support bar 9, the vertical irradiation of the light of the transmitting of generating laser 28
On graduated scale 27, so as to accurately measure the level of first support bar 8 and second support bar 9 in vertical spacing partially
Shifting value, and then the effect of measurement body of rod perpendicularity, can adjust the body of rod so that the body of rod hangs down according to the perpendicularity measured
Directly.
It can to sum up obtain, (1), the present invention are led to by setting fix bar 1, upper fixed cover 2, lower fixed cover 3 and fixing bolt 4
Cross and upper fixed cover 2 and lower fixed cover 3 are socketed on the body of rod to be measured, pass through rotary fixing screw bolt 4 so that the one of fixing bolt 4
The surface with the body of rod to be measured is held only to paste, so as to which fix bar 1 is fixed on the body of rod to be measured, while above fixed cover 2 and lower fixation
It is smooth that the common fixation of set 3 causes fix bar 1 to install, and is fixed with fixing bolt 4 so that it is simple to operate, it is easy for installation.
(2), the present invention launches laser straight up by generating laser 28, and laser leaves light on the surface of graduated scale 27
Point, the skew reading of luminous point is read by position of the luminous point on graduated scale 27, so that reading of the user according to skew
And the distance computation between the rotating shaft 6 of first rotating shaft 5 and second goes out the perpendicularity of the body of rod to be measured, consequently facilitating the angle of the adjustment body of rod
Degree, it is simple and easy to use.
(3), the present invention is by setting the first chute 10, the first sliding block 11, the 3rd rotating shaft 12, the 4th rotating shaft 13, first to connect
Bar 14, the first rolling bearing units 15, the first screw rod 16 and the first rack rails 17, when rotating regulation handle 29, drive the first screw rod 16
Rotation, the first screw rod 16 rotates so that the screw thread on the first screw rod 16 produces motive force, the first rack rails to the first rack rails 17
17 drive the transverse shifting of the first rack rails 17 in the presence of thrust, so as to the first sliding block 11 in the first chute 10 it is movable, when the
When one sliding block 11 slides, rotated by the impetus first support bar 14 of connecting rod around first rotating shaft 5, so as to change the
The angle of one support bar 8, so as to the angle by changing first support bar 8 so that the keep level of first support bar 8,
Debugging can cause the also keep level of second support bar 9 in the same way, and operating method is simple, and adjustment is accurate.
(4), the present invention is by setting horizontal bubble instrument 26 intuitively to find out first support bar 8 and second support bar 9
Whether keep level state, consequently facilitating adjustment is carried out to first support bar 8 and second support bar 9, when regulation to horizontal bubble
Ensure that first support bar 8 and second support bar 9 are horizontal when the horizontal bubble of instrument 26 is placed in the middle, so that measurement result is accurate.
(5) it is, of the invention by setting generating laser 28 and graduated scale 27, so that the transmitting of generating laser 28
The vertical irradiation of light is on graduated scale 27, so as to accurately measure first support bar 8 and second support bar 9 vertical
Horizontal offset values in spacing, and then the effect of measurement body of rod perpendicularity, it is practical simple and convenient.
It should be noted that herein, such as first and second or the like relational terms are used merely to a reality
Body or operation make a distinction with another entity or operation, and not necessarily require or imply and deposited between these entities or operation
In any this actual relation or order.Moreover, term " comprising ", "comprising" or its any other variant are intended to
Nonexcludability includes, so that process, method, article or equipment including a series of elements not only will including those
Element, but also the other element including being not expressly set out, or it is this process, method, article or equipment also to include
Intrinsic key element.In the absence of more restrictions, the key element limited by sentence " including a reference structure ", is not arranged
Except other identical element in the process including the key element, method, article or equipment being also present.
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of changes, modification can be carried out to these embodiments, replace without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (8)
1. a kind of laser detector of rod-like articles perpendicularity, including fix bar (1), it is characterised in that：The fix bar (1)
Side be fixedly connected with the collar (2) and lower collar (3), the upper collar (2) and lower collar (3) are away from fix bar (1)
Side is threaded with fixing bolt (4), and the one side of the fix bar (1) opens up fluted (5), the groove (5)
Inwall is plugged with first rotating shaft (6) and the second rotating shaft (7), and the surface of the first rotating shaft (6) is fixedly connected with first support bar
(8), the surface of second rotating shaft (7) is fixedly connected with second support bar (9), and the side of the first support bar (8) opens up
There is the first chute (10), be connected with the first sliding block (11) in first chute (10), the surface of first sliding block (11) is inserted
The 3rd rotating shaft (12) is connected to, the surface of the fix bar (1) is plugged with the 4th rotating shaft (13), the 3rd rotating shaft (12) and the 4th
Rotating shaft (13) is flexibly connected by first connecting rod (14), and the front of the first support bar (8) is fixedly connected with first and usherd to seat axle
Hold (15), be plugged with the first screw rod (16) in first rolling bearing units (15), the upper surface of first sliding block (11) is fixed
The first rack rails (17) is connected with, first rack rails (17) is engaged with the first screw rod (16), the surface of the second support bar (9)
The second chute (18) is offered, the second sliding block (19), the table of second sliding block (19) are connected with second chute (18)
Face is plugged with the 5th rotating shaft (20), and the front of the fix bar (1) is plugged with the 6th rotating shaft (21), the 5th rotating shaft (20) with
6th rotating shaft (21) is flexibly connected by second connecting rod (22), and the front of the second support bar (9) is fixedly connected with the second band
Seat bearing (23), second rolling bearing units (23) are interior to be plugged with the second screw rod (24), the upper surface of second sliding block (19)
Be fixedly connected with the second rack rails (25), second rack rails (25) is engaged with the second screw rod (24), the first support bar (8) and
Horizontal bubble instrument (26) is fixedly connected with second support bar (9), the lower surface of the first support bar (8) is fixedly connected with
Graduated scale (27), the upper surface of the second support bar (9) are fixedly connected with generating laser (28).
A kind of 2. laser detector of rod-like articles perpendicularity according to claim 1, it is characterised in that：The upper set
Ring (2) is identical with the shapes and sizes of lower collar (3), and the upper collar (2) and lower collar (3) using the center line of fix bar (1) as pair
Line is claimed to be symmetrical arranged.
A kind of 3. laser detector of rod-like articles perpendicularity according to claim 1, it is characterised in that：Described first
The shape and first for being shaped as T-shaped, first sliding block (11) and the second sliding block (19) of chute (10) and the second chute (18)
Chute (10) is consistent with the shape of the second chute (18).
A kind of 4. laser detector of rod-like articles perpendicularity according to claim 1, it is characterised in that：Described first
The one end of screw rod (16) and the second screw rod (24) away from fix bar (1) has been fixedly connected with regulation handle (29).
A kind of 5. laser detector of rod-like articles perpendicularity according to claim 1, it is characterised in that：The scale
The precision of chi (27) is millimeter, and the center of the graduated scale (27) is zero graduation, and the graduated scale (27) is using zero graduation as midpoint
It is symmetrically arranged with positive and negative scale.
A kind of 6. laser detector of rod-like articles perpendicularity according to claim 1, it is characterised in that：Described first
The equal length of support bar (8) and second support bar (9), and first support bar (8) is located at the surface of second support bar (9).
A kind of 7. laser detector of rod-like articles perpendicularity according to claim 1, it is characterised in that：The laser
The lower surface of transmitter (28) face graduated scale (27), and generating laser (28) is located at the centre of second support bar (9).
A kind of 8. laser detector of rod-like articles perpendicularity according to claim 1, it is characterised in that：The upper cunning
The shape for covering (2) and low sleeve (3) is polygon prism, and upper sliding sleeve (2) and low sleeve (3) are preferably four-prism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710951159.5A CN107588757A (en) | 2017-10-13 | 2017-10-13 | A kind of laser detector of rod-like articles perpendicularity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710951159.5A CN107588757A (en) | 2017-10-13 | 2017-10-13 | A kind of laser detector of rod-like articles perpendicularity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107588757A true CN107588757A (en) | 2018-01-16 |
Family
ID=61053842
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710951159.5A Withdrawn CN107588757A (en) | 2017-10-13 | 2017-10-13 | A kind of laser detector of rod-like articles perpendicularity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107588757A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108548521A (en) * | 2018-04-23 | 2018-09-18 | 黄宇松 | A kind of rotary angle surveying device of bridge construction |
| CN114252055A (en) * | 2021-11-18 | 2022-03-29 | 中建八局第二建设有限公司 | Wood formwork and aluminum formwork perpendicularity detection device |
| CN116753929A (en) * | 2023-08-16 | 2023-09-15 | 山东鲁南数据科技股份有限公司 | Long distance measuring device for verticality measurement |
-
2017
- 2017-10-13 CN CN201710951159.5A patent/CN107588757A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108548521A (en) * | 2018-04-23 | 2018-09-18 | 黄宇松 | A kind of rotary angle surveying device of bridge construction |
| CN114252055A (en) * | 2021-11-18 | 2022-03-29 | 中建八局第二建设有限公司 | Wood formwork and aluminum formwork perpendicularity detection device |
| CN114252055B (en) * | 2021-11-18 | 2024-03-08 | 中建八局第二建设有限公司 | Wood template and aluminum template straightness detection device that hangs down |
| CN116753929A (en) * | 2023-08-16 | 2023-09-15 | 山东鲁南数据科技股份有限公司 | Long distance measuring device for verticality measurement |
| CN116753929B (en) * | 2023-08-16 | 2023-11-28 | 山东鲁南数据科技股份有限公司 | Long distance measuring device for verticality measurement |
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Application publication date: 20180116 |