CN207019560U - Measuring scale and survey tool component - Google Patents
Measuring scale and survey tool component Download PDFInfo
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- CN207019560U CN207019560U CN201721044440.2U CN201721044440U CN207019560U CN 207019560 U CN207019560 U CN 207019560U CN 201721044440 U CN201721044440 U CN 201721044440U CN 207019560 U CN207019560 U CN 207019560U
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- chi body
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Abstract
Engineering measuring technology field is the utility model is related to, in particular to a kind of measuring scale and survey tool component.The measuring scale includes the first chi body, the second chi body, articulated elements, obliquity sensor, display device and processor.The first chi body and the second chi body are hinged by the articulated elements, fold or deploy to realize, the obliquity sensor, display device and processor are arranged at the first chi body, the display surface of the display device deviates from the first chi body, and the obliquity sensor and display device are electrically connected with the processor respectively.The survey tool component includes the measuring scale.The measuring scale and the survey tool component accuracy of measurement are high.
Description
Technical field
Engineering measuring technology field is the utility model is related to, in particular to a kind of measuring scale and survey tool component.
Background technology
In the prior art, measuring scale is to apply gravity principle, pointer is driven with the swing of pendulum, in corresponding hunting range
It is interior it is uniform scale is set, to represent the scope of deviation, pointer stop indicated at scale, that is, represent the measuring surface with marking
The deviation of quasi- vertical plane.The structure of existing measuring scale is mechanical, and being particularly susceptible to external force influences and influence measurement result,
Such as the influence in collision, magnetic field etc..In addition, existing measuring scale is to determine measurement result by pointer indicating graduation value, and
The mark of graduation mark is influenceed by measurement range and visual line width, it is impossible to the too refinement of mark, is so just deposited in reading
In estimate, and in reading because visual angle difference also brings along certain deviation.
Utility model content
In view of this, the purpose of the utility model embodiment is to provide a kind of measuring scale and measuring method above-mentioned to solve
Problem.
The utility model embodiment provides a kind of measuring scale, including the first chi body, the second chi body, articulated elements, inclination angle biography
Sensor, display device and processor；
The first chi body and the second chi body are hinged by the articulated elements, are folded or are deployed to realize, the inclination angle passes
Sensor, display device and processor are arranged at the first chi body, and the display surface of the display device deviates from the first chi body,
The obliquity sensor and display device are electrically connected with the processor respectively.
Further, the measuring scale also includes sound broadcasting device, and the sound broadcasting device is arranged at described first
Chi body, and be electrically connected with the processor.
Further, the articulated elements includes connecting shaft, and is rotatablely connected with the first of the connecting shaft and is hinged
Portion and the second articulated section, first articulated section are connected to one end of the first chi body, and second articulated section is connected to institute
State one end of the second chi body.
Further, the first chi body is hollow cavity structure, and the second chi body is hollow cavity structure, described
One articulated section is arranged inside the hollow cavity of the first chi body, and second articulated section is arranged in the second chi body
Inside cavity body.
Further, the measuring scale also includes the first end cap and the second end cap, and first end cap is covered on described
One end of the remote articulated elements of one chi body, second end cap are covered on the remote articulated elements of the second chi body
One end.
Further, the measuring scale also includes positioner, and the positioner includes alignment pin and spacer, described
The close articulated elements that alignment pin is arranged at the first chi body is opening position, and the spacer is rotatably arranged at described
The opening position of the close articulated elements of second chi body, and can be by rotation lock due to the alignment pin or from the alignment pin
Depart from.
Further, the measuring scale also includes handle, and the handle is arranged at the first chi body, and/or, described
Two chi bodies.
Further, the measuring scale also includes control keyboard, and the control keyboard is arranged at the first chi body, and leans on
The nearly display device, and be electrically connected with the processor.
Further, the obliquity sensor is solid state sensor or liquid angular sensor.
The utility model embodiment additionally provides a kind of survey tool component, and the survey tool component includes above-mentioned measurement
Chi.
The utility model embodiment provide measuring scale and measuring method, by the first chi body set obliquity sensor,
Display device and processor, wherein, obliquity sensor is used for when the first chi body and the second chi are shown consideration for together in building sides, and measurement is built
The angle value of face and reference plane is built, processor is used for according to angle value, and the length of the first chi body and/or the length of the second chi body
Degree, calculates the error amount between building sides and reference plane, and show by display device.What the utility model embodiment provided
Compared to prior art, accuracy of measurement is high, and directly digitizes measurement result, is easy to use for measuring scale and measuring method
Person reads, and reduces error in reading, further enhances accuracy of measurement.
To enable above-mentioned purpose of the present utility model, feature and advantage to become apparent, preferred embodiment cited below particularly, and
Accompanying drawing appended by cooperation, elaborates.
Brief description of the drawings
, below will be to required use in embodiment in order to illustrate more clearly of the technical scheme of the utility model embodiment
Accompanying drawing be briefly described.It should be appreciated that the following drawings illustrate only some embodiments of the present utility model, therefore should not be by
Regard the restriction to scope as, for those of ordinary skill in the art, on the premise of not paying creative work, may be used also
To obtain other related accompanying drawings according to these accompanying drawings.
Fig. 1 is a kind of structural representation of the first state of measuring scale that the utility model embodiment provides.
Fig. 2 is a kind of structural representation of second of state of measuring scale that the utility model embodiment provides.
Fig. 3 is a kind of structural representation of the third state of measuring scale that the utility model embodiment provides.
Fig. 4 is a kind of schematic block diagram for measuring scale that the utility model embodiment provides.
Fig. 5 is a kind of assembling schematic diagram for measuring scale that utility model embodiment provides.
Fig. 6 is a kind of structural representation for articulated elements that the utility model embodiment provides.
Fig. 7 is that a kind of measuring scale the first chi body of the utility model embodiment offer and the structure of the second chi body hinged place are shown
It is intended to.
Fig. 8 is a kind of complementary explanation figure for measuring scale measuring method that the utility model embodiment provides.
Fig. 9 is another complementary explanation figure for the measuring scale measuring method that the utility model embodiment provides.
Icon：10- measuring scales；100- the first chi bodies；200- the second chi bodies；300- articulated elements；310- connecting shafts；320-
One articulated section；321- connecting portions；The installation portions of 322- first；The installation portions of 323- second；324- reinforcers；The articulated sections of 330- second；
400- obliquity sensors；500- display devices；600- processors；700- positioners；710- alignment pins；720- spacers；
800- handles；The end caps of 900- first；The end caps of 1000- second；1100- sound broadcast devices；1200- control keyboards.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describe.Obviously, described embodiment is only the utility model part of the embodiment, rather than whole
Embodiment.The component of the utility model embodiment being generally described and illustrated herein in the accompanying drawings can be with a variety of configurations
To arrange and design.Therefore, the detailed description of the embodiment of the present utility model to providing in the accompanying drawings is not intended to limit below
The claimed the scope of the utility model of system, but it is merely representative of selected embodiment of the present utility model.It is new based on this practicality
The embodiment of type, the every other embodiment that those skilled in the art are obtained on the premise of creative work is not made,
Belong to the scope of the utility model protection.
It should be noted that：Similar label and letter represents similar terms in following accompanying drawing, therefore, once a certain Xiang Yi
It is defined, then it further need not be defined and explained in subsequent accompanying drawing in individual accompanying drawing.
Fig. 1~Fig. 4 is referred to, the utility model embodiment provides a kind of measuring scale 10, including the first chi body 100,
Two chi bodies 200, articulated elements 300, obliquity sensor 400, display device 500 and processor 600.
Wherein, the first chi body 100 and the second chi body 200 are be hinged by the articulated elements 300, fold or open up to realize
Open, the obliquity sensor 400, display device 500 and processor 600 are arranged at the first chi body 100, the display device
500 display surface deviates from the first chi body 100, the obliquity sensor 400 and display device 500 respectively with the processor
600 are electrically connected with.
The obliquity sensor 400 is used for when the first chi body 100 and the second chi body 200 fit in building sides, surveys
Measure the angle value of the building sides and the plane of reference.The processor 600 is used for according to the angle value, and the first chi body
The length of 100 length and/or the second chi body 200, calculate the building sides and build the error amount between reference plane,
And shown by the display device 500.
The plane of reference can be horizontal plane or vertical plane, with specific reference to the specific of the obliquity sensor 400
Depending on design.In the present embodiment, the plane of reference is horizontal plane.The building reference plane can be vertical plane or water
Plane, specifically can be depending on building sides type.In the present embodiment, the building sides can be metope or ground,
When building sides is metope, the building reference plane is vertical plane, and when building sides is ground, the building reference plane is level
Face.
Alternatively, in the present embodiment, the processor 600 can also according to the angle value of the building sides and the plane of reference,
Judge the building sides type that the measuring scale 10 measures, with the operation rule according to corresponding to the building sides type selecting, calculate
Go out the building sides and build the error amount between reference plane.As a kind of embodiment, in the present embodiment, when the processor
600 judge to draw the threshold range residing for the angle value, for example, judging to show that the angle value is in the first predetermined threshold value model
When enclosing, the building sides for judging the measurement is metope, choose the first operation rule, calculate the metope with building reference plane it
Between error amount, when the processor 600 judges to draw threshold range residing for the angle value, for example, judging to draw described
When angle value is in the second preset threshold range, the building sides for judging the measurement is ground, chooses the second operation rule, is calculated
Go out the ground and build the error amount between reference plane.In the present embodiment, first preset threshold range can be 85 °~
90 °, second preset threshold range can be 0 °~5 °.Furthermore, it is necessary to explanation, the present embodiment is default to described first
The concrete numerical value of threshold range and second preset threshold range is not specifically limited.
In the present embodiment, the processor 600 can be also used for the angle value according to the building sides and the plane of reference, calculate
Go out the building sides and build the angle of reference plane, and shown by the display device 500.It is understood that alternatively,
In the present embodiment, the display device 500 is additionally operable to show incline direction of the building sides relative to the building reference plane.
Cost is fabricated to reduce, in the present embodiment, the first chi body 100 and the second chi body 200 can be
Two chi bodies of structure identical.In the present embodiment, the first chi body 100 and the second chi body 200 can be in flake, or
Hollow cavity structure.Further, in the present embodiment, the first chi body 100 and the second chi body 200 are hollow cavity knot
Structure, and the rectangular cross-section of the first chi body 100 and the second chi body 200, that is, the cavity is rectangular enclosure.In addition, this
In embodiment, the length of the length of the first chi body 100 and the second chi body 200 is one meter.It is understood that this reality
Apply in example, the length of the length of the first chi body 100 and the second chi body 200 can also be other, and first chi
The length of body 100 and the length of the second chi body 200 are it can also be provided that different value.
Incorporated by reference to Fig. 5 and Fig. 6, alternatively, in the present embodiment, the articulated elements 300 includes connecting shaft 310, and can turn
Dynamic the first articulated section 320 and the second articulated section 330 that are connected to the connecting shaft 310, first articulated section 320 is connected to
One end of the first chi body 100, second articulated section 330 are connected to one end of the second chi body 200.
In the present embodiment, first articulated section 320 includes connecting portion 321, and is connected to the of the connecting portion 321
One installation portion 322 and the second installation portion 323, interval between first installation portion 322 and second installation portion 323 be present.
The connecting portion 321 is provided with through hole, and the connecting portion 321 can be sheathed on the connecting shaft 310 by the through hole.This
Outside, to strengthen the structural strength of first articulated section 320, alternatively, in the present embodiment, first articulated section 320 is also wrapped
Reinforcer 324 is included, described one end of reinforcer 324 is connected to first installation portion 322, and the other end is connected to second installation
Portion 323.In the present embodiment, second articulated section 330 is identical with the structure of the first articulated section 320, and here is omitted.
First articulated section 320 is arranged inside the hollow cavity of the first chi body 100, and passes through screw, bolt
The first chi body 100 is connected to Deng removable connector, second articulated section 330 is arranged at the second chi body 200
Inside hollow cavity, the second chi body 200 is connected to again by removable connectors such as screw, bolts.
In the present embodiment, the making material of the first chi body 100, the second chi body 200 and articulated elements 300 can be stainless
The metal material such as Steel material or aluminium alloy, the present embodiment are not particularly limited to this.
The obliquity sensor 400 can be solid state sensor, for example, it may be SCA100T-D01/D02VTI inclination angles pass
Sense chip, can also MMA7361LCR1 inclination angles sensing chip.The obliquity sensor 400 can also be liquid angular sensor.Institute
It can be LCD liquid crystal display screen or LED display to state display device 500.The processor 600 can be a kind of tool
There is the IC chip of signal handling capacity.The processor 600 can also be general processor, and the processor 600 is also
Can be application specific integrated circuit (ASIC), discrete gate or transistor logic, discrete hardware components.The processor 600
It can realize or perform the disclosed structured flowchart in the utility model example.In addition, general processor can be microprocessor
(MCU) it can also be any conventional controller etc..
Incorporated by reference to Fig. 7, the convenience used for the enhancing measuring scale 10, alternatively, and in the present embodiment, the measuring scale
10 also include positioner 700, and the positioner 700 includes alignment pin 710 and spacer 720, and the alignment pin 710 is set
It is opening position in the close articulated elements 300 of the first chi body 100, the spacer 720 is rotatably arranged at described
The opening position of the close articulated elements 300 of second chi body 200, and can by rotation lock due to the alignment pin 710 or from
The alignment pin 710 departs from.Alternatively, in the present embodiment, the spacer 720 again may be by alignment pin 710 and be arranged at
The second chi body 200, the spacer 720 is only needed to rotate rotation lock relative to the second chi body 200 due to described
Alignment pin 710 departs from from the alignment pin 710.
To further enhance the convenience that the measuring scale 10 uses, alternatively, in the present embodiment, the measuring scale 10 is also
Including handle 800, the handle 800 is arranged at the first chi body 100, and/or, the second chi body 200.Specifically, originally
In embodiment, the handle 800 includes two, and is respectively arranged at the first chi body 100 and the second chi body 200.
To ensure the good appearance of the measuring scale 10, alternatively, in the present embodiment, the measuring scale 10 also includes first
The end cap 1000 of end cap 900 and second, first end cap 900 are covered on the remote articulated elements 300 of the first chi body 100
One end, second end cap 1000 is covered on one end of the remote articulated elements 300 of the second chi body 200.
Alternatively, in the present embodiment, the measuring scale 10 also includes sound broadcasting device 1100, the sound broadcasting device
1100 are arranged at the first chi body 100, and are electrically connected with the processor 600.The sound broadcasting device 1100 is used for
Error amount between the building sides and the building reference plane is reported.In this way, when measuring the error amount, make
User can be directly to obtain the error amount, without being read by the display device 500 by the sound broadcasting device 1100
Take, further improve operating efficiency.
During the use of the measuring scale 10, user can select to fold the measuring scale 10 according to the actual requirements
Measure, namely so that the measuring scale 10 works in one meter of measuring state, or the expansion measuring scale 10 measures,
Namely so that the measuring scale 10 works in two meters of measuring states.Two meters of measurement shapes will be worked in the measuring scale 10 below
State, and be used for exemplified by measuring the error amount between metope and building reference plane, the measuring method of the measuring scale 10 is said
It is bright.When building sides is metope, the building reference plane is vertical plane.
User deploys chi body, and is locked in the alignment pin 710 by spacer 720, by described the first of expansion
Chi body 100 and the second chi body 200 fit in the metope, and are measured perpendicular to wall corner line so that the inclination angle passes
Sensor 400 measures the angle value of the metope and the plane of reference, and the processor 600 is according to the angle value, and described
The length of the length of one chi body 100 and the second chi body 200, calculate between the building sides and the building reference plane
Error amount, and shown by the display device 500, reported by the sound broadcasting device 1100.
Specifically, after the obliquity sensor 400 measures the angle value of the building sides and the plane of reference, the processor
600 judge that angle value is in 85 °~90 ° of the first preset threshold range, judge that the building sides for metope, then chooses the first computing
Rule, to calculate the metope and build the error amount between reference plane.Fig. 8 is respectively that the incline direction of the metope is the
When one preset direction and the second preset direction, the measuring scale 10 is used to measure the metope and builds the error between reference plane
The complementary explanation figure of the measuring method of value, first preset direction and second preset direction are opposite direction.It please tie
Fig. 8 is closed, for example, the obliquity sensor 400 measures the angle value α of the metope and the plane of reference, the processor 600
Judging that the angle value α is in 85 °~90 ° of the first preset threshold range, the length of the first chi body 100 is L1, described
The length of two chi bodies 200 is L2, then the error amount between the metope and the building reference plane：
△ 1=(L1+L2) * cos α
Now, the building sides and the angle of the building reference plane：
β=90 °-α
It is understood that in the present embodiment, △ 1=(L1+L2) * cos α are the first operation rule.
Alternatively, can also be and described according to the building sides and the angle of the building reference plane in the present embodiment
Error amount between the length computation building sides and building reference plane of the length of first chi body 100 and the second chi body 200,
I.e.：
△ 1=(L1+L2) * sin β
It should be noted that in the present embodiment, the measuring scale 10 can be also used for measuring ground with build reference plane it
Between error amount.Two meters of measuring states will be worked in the measuring scale 10 below, and for measuring ground and building reference plane
Between error amount exemplified by, the measuring method of the measuring scale 10 is illustrated.It is understood that in the present embodiment, when
When building sides is ground, the building reference plane is horizontal plane.
User deploys chi body, and is locked in the alignment pin 710 by spacer 720, by described the first of expansion
Chi body 100 and the second chi body 200 fit in the ground and measured so that the obliquity sensor 400 measures institute
The angle value of ground and the plane of reference is stated, the processor 600 is according to the angle value, and the length of the first chi body 100
With the length of the second chi body 200, the error amount between the building sides and the building reference plane is calculated, and pass through institute
State display device 500 to show, reported by the sound broadcasting device 1100.
Specifically, after the obliquity sensor 400 measures the angle value of the building sides and the plane of reference, the processor
600 judge that angle value is in 0 °~5 ° of the first preset threshold range, judge the building sides for ground, then choose the second computing rule
Then, with calculate the ground and build reference plane between error amount.Fig. 9 is respectively that the incline direction on the ground is the 3rd
When preset direction and four preset directions, the measuring scale 10 is used to measure the ground and builds the error amount between reference plane
Measuring method complementary explanation figure, the 3rd preset direction and the 4th preset direction are opposite direction.Incorporated by reference to
Fig. 9, for example, the obliquity sensor 400 measures the ground and the α of the angle value of the plane of reference, the processor 600
Judging that the angle value α is in 0 °~5 ° of the second preset threshold range, the length of the first chi body 100 is L1, described second
The length of chi body 200 is L2, then the error amount between the ground and the building reference plane：
△ 1=(L1+L2) * sin α
Now, the building sides and the angle of the building reference plane are angle value α.
It is understood that in the present embodiment, △ 1=(L1+L2) * sin α are the second operation rule.
In the present embodiment, the measuring scale 10 also includes control keyboard 1200, and the control keyboard 1200 is arranged at described
First chi body 100, and close to the display device 500, and be electrically connected with the processor 600.User passes through the control
Keyboard 1200 processed be the changeable measuring scale 10 working condition, including start shooting, shut down, one meter of measuring state, two meters measurement
Switching between state.
The utility model embodiment additionally provides a kind of survey tool component, and the survey tool component includes above-mentioned measurement
Chi 10.
In summary, the measuring scale and survey tool component that the utility model embodiment provides, by the first chi body 100
Obliquity sensor 400, display device 500 and processor 600 are set, wherein, obliquity sensor 400 is used in the first chi body 100
When fitting in building sides with the second chi body 200, the angle value of building sides and reference plane is measured, processor 600 is used for according to angle
Value, and the length of the first chi body 100 and/or the length of the second chi body 200, calculate the error between building sides and reference plane
Value, and shown by display device 500.The measuring scale machine survey tool component that the utility model embodiment provides is compared to existing
Technology, accuracy of measurement is high, and directly digitizes measurement result, is easy to user to read, reduces error in reading, enters one
Step enhances accuracy of measurement.
In description of the present utility model, it is also necessary to which explanation, unless otherwise clearly defined and limited, term " are set
Put ", " installation ", " connection " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integratedly
Connection.Can be mechanical connection or electrical connection.Can be joined directly together, can also be indirectly connected by intermediary,
It can be the connection of two element internals.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition
Concrete meaning of the language in the utility model.
In description of the present utility model, it is also necessary to explanation, the orientation or position of the instruction such as term " interior " and " outer "
Relation be based on orientation shown in the drawings or position relationship, or the utility model product using when the orientation usually put or
Position relationship, it is for only for ease of description the utility model and simplifies description, rather than indicates or imply signified device or member
Part must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to limitation of the present utility model.
In addition, term " first ", " second " etc. are only used for distinguishing description, and it is not intended that instruction or hint relative importance.
Preferred embodiment of the present utility model is the foregoing is only, is not limited to the utility model, for this
For the technical staff in field, the utility model can have various modifications and variations.It is all in the spirit and principles of the utility model
Within, any modification, equivalent substitution and improvements made etc., it should be included within the scope of protection of the utility model.
Claims (10)
1. a kind of measuring scale, it is characterised in that including the first chi body, the second chi body, articulated elements, obliquity sensor, display device
And processor；
The first chi body and the second chi body are hinged by the articulated elements, are folded or are deployed to realize, the obliquity sensor,
Display device and processor are arranged at the first chi body, and the display surface of the display device deviates from the first chi body, described
Obliquity sensor and display device are electrically connected with the processor respectively.
2. measuring scale according to claim 1, it is characterised in that the measuring scale also includes sound broadcasting device, described
Sound broadcasting device is arranged at the first chi body, and is electrically connected with the processor.
3. measuring scale according to claim 1, it is characterised in that the articulated elements includes connecting shaft, and rotatably
The first articulated section and the second articulated section of the connecting shaft are connected to, first articulated section is connected to the one of the first chi body
End, second articulated section is connected to one end of the second chi body.
4. measuring scale according to claim 3, it is characterised in that the first chi body is hollow cavity structure, described
Two chi bodies are hollow cavity structure, and first articulated section is arranged inside the hollow cavity of the first chi body, described second
Articulated section is arranged inside the hollow cavity of the second chi body.
5. measuring scale according to claim 4, it is characterised in that the measuring scale also includes the first end cap and the second end
Lid, first end cap are covered on one end of the remote articulated elements of the first chi body, and second end cap is covered on institute
State one end of the remote articulated elements of the second chi body.
6. measuring scale according to claim 3, it is characterised in that the measuring scale also includes positioner, the positioning
Device includes alignment pin and spacer, and the close articulated elements that the alignment pin is arranged at the first chi body is opening position,
The spacer is rotatably arranged at the opening position of the close articulated elements of the second chi body, and can pass through rotation lock
Depart from due to the alignment pin or from the alignment pin.
7. measuring scale according to claim 1, it is characterised in that the measuring scale also includes handle, and the handle is set
In the first chi body, and/or, the second chi body.
8. measuring scale according to claim 1, it is characterised in that the measuring scale also includes control keyboard, the control
Keyboard is arranged at the first chi body, and is electrically connected with close to the display device, and with the processor.
9. measuring scale according to claim 1, it is characterised in that the obliquity sensor is solid state sensor or electrolyte
Sensor.
10. a kind of survey tool component, it is characterised in that the survey tool component includes claim 1~9 any one institute
The measuring scale stated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721044440.2U CN207019560U (en) | 2017-08-18 | 2017-08-18 | Measuring scale and survey tool component |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721044440.2U CN207019560U (en) | 2017-08-18 | 2017-08-18 | Measuring scale and survey tool component |
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ID=61477593
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109900247A (en) * | 2019-02-25 | 2019-06-18 | 孙亚泉 | A kind of pile body level detection device of architectural engineering |
| CN115096254A (en) * | 2022-06-17 | 2022-09-23 | 上海铁路北斗测量工程技术有限公司 | High-precision foldable leveling rod |
-
2017
- 2017-08-18 CN CN201721044440.2U patent/CN207019560U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109900247A (en) * | 2019-02-25 | 2019-06-18 | 孙亚泉 | A kind of pile body level detection device of architectural engineering |
| CN115096254A (en) * | 2022-06-17 | 2022-09-23 | 上海铁路北斗测量工程技术有限公司 | High-precision foldable leveling rod |
| CN115096254B (en) * | 2022-06-17 | 2024-03-26 | 上海铁路北斗测量工程技术有限公司 | High-precision foldable levelling rod |
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