CN209649917U - A kind of low cost 3 D measuring instrument - Google Patents
A kind of low cost 3 D measuring instrument Download PDFInfo
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- CN209649917U CN209649917U CN201920239252.8U CN201920239252U CN209649917U CN 209649917 U CN209649917 U CN 209649917U CN 201920239252 U CN201920239252 U CN 201920239252U CN 209649917 U CN209649917 U CN 209649917U
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- Prior art keywords
- probe
- rack
- engraving machine
- conducting wire
- measuring instrument
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- 239000000523 sample Substances 0.000 claims description 84
- 239000002184 metal Substances 0.000 claims description 36
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 14
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 239000007769 metal material Substances 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000005259 measurement Methods 0.000 description 23
- 238000000034 method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 230000001960 triggered effect Effects 0.000 description 3
- 230000008602 contraction Effects 0.000 description 2
- 230000003137 locomotive effect Effects 0.000 description 2
- 239000010979 ruby Substances 0.000 description 2
- 229910001750 ruby Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
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- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The utility model discloses a kind of inexpensive 3 D measuring instruments, it is related to fine measuring instrument technical field, the utility model includes 3D engraving machine, the levelling bench for placing measured workpiece is provided on 3D engraving machine, 3D engraving machine is connected with the detecting head above levelling bench, measured workpiece and detecting head are electrically conductive, 3D engraving machine is electrically connected with control panel, limit switches are set in control panel, limit switch is connected separately with conducting wire A and conducting wire B, the conducting wire A other end is connect with detecting head, the conducting wire B other end is connect with measured workpiece, cut-out switch is provided on conducting wire B, the utility model has structure simple, it is easy to operate, the low advantage of manufacturing cost.
Description
Technical field
The utility model relates to fine measuring instrument technical fields, more particularly to a kind of inexpensive three-dimensional measurement
Instrument.
Background technique
Three-dimensional measuring instrument, also referred to as 3 D measuring instrument are primarily referred to as taking a little a kind of instrument to measure by three-dimensional,
Cardinal principle is: testee is placed in three-D measurement space, can get the coordinate position of each measuring point on testee, according to
The spatial value of these points, is computed the geometric dimension for finding out testee, shape and position.Basic principle is exactly to pass through spy
It surveys sensor (probe) and measures the cooperation of spatial axis movement, obtaining for discrete spatial point position is carried out to tested geometric element
It takes, then by certain mathematical computations, completes the analysis to measured point (point group) and be fitted, finally restore tested geometry
Element, and its deviation between theoretical value (nominal value) is calculated on this basis, to complete the inspection man to tested part
Make.
Structure is complicated for existing 3 D measuring instrument, and operation is more troublesome, and the higher 3 D measuring instrument valence of a measurement accuracy
Lattice sheet is in hundreds of thousands member, and expensive, use cost is high, is unfavorable for promoting the use of.
Therefore above-mentioned technical problem how is solved, there is very much realistic meaning to those skilled in the art.
Utility model content
The purpose of this utility model is that: in order to solve existing 3 D measuring instrument, structure is complicated, and operation is more troublesome,
And expensive, the high technical problem of use cost, the utility model provide a kind of inexpensive 3 D measuring instrument.
The utility model specifically uses following technical scheme to achieve the goals above:
A kind of low cost 3 D measuring instrument, including 3D engraving machine are provided with for placing measured workpiece on 3D engraving machine
Levelling bench, 3D engraving machine are connected with the detecting head above levelling bench, and measured workpiece and detecting head are electrically conductive, 3D carving
Quarter, machine was electrically connected with control panel, and setting limit switches, limit switch are connected separately with conducting wire A and conducting wire B, lead in control panel
The line A other end is connect with detecting head, and the conducting wire B other end is connect with measured workpiece, is provided with cut-out switch on conducting wire B.
Further, 3D engraving machine includes rack, and sliding shoe is provided in rack, and detecting head is connected to sliding shoe bottom,
It is provided with the X-axis motor for driving sliding shoe left and right horizontal mobile in rack, is provided in rack and sliding shoe is driven vertically to move up and down
Dynamic Z axis motor, bottom of the frame are provided with y-axis motor, and y-axis motor can drive levelling bench horizontal shifting.
Further, horizontal slide rail is provided in rack, sliding is provided with slide guide component on horizontal slide rail, and X-axis motor can
It drives slide guide component mobile, is provided with upright slide rail on slide guide component, sliding shoe is slidably arranged on upright slide rail, Z axis motor
At the top of upright slide rail.
Further, rack lower end is provided with the pedestal that can be slid in bottom of the frame, and levelling bench quadrangle is connected by screw
It connects on pedestal, lead screw is provided through in pedestal, lead screw is connect by shaft coupling with y-axis motor.
Further, detecting head includes the blocky probe clip for being connected to sliding shoe bottom, is opened up on blocky probe clip useful
In the mounting hole of connecting wire A, four sides of blocky probe clip and bottom extend vertically through and are provided with telescopic probe, telescopic
Probe is each attached on blocky probe clip, and telescopic telescopic one end of probe is respectively connected with metal probe, metal probe difference
Four sides and its bottom surface of face bulk probe clip, blocky probe clip and telescopic probe are metal material.
Further, telescopic probe includes the outer tube being fixed on blocky probe clip, and outer tube is open at one end, is set in outer tube
It is equipped with compressed spring, the flexible interior bar contacted with compressed spring is provided in outer tube, the other end of flexible interior bar stretches out outer tube and opens
Mouth is simultaneously connected with corresponding metal probe.
Working principle: after measured workpiece is placed on levelling bench, start 3D engraving machine, X-axis motor and Z axis motor can
Drive detecting head mobile with up and down direction in left and right directions respectively, it is tested that detecting head is moved downwardly until that its metal probe touches
In workpiece when bottom, the coordinate value can be measured in Z-direction, detecting head is moved to the left or right until its metal probe contacts
When to measured workpiece inner sidewall, the coordinate value can be measured in X-direction, y-axis motor can drive levelling bench and measured workpiece
It is whole to be moved forward and backward, until measured workpiece inner sidewall touches the metal probe of detecting head, the point can be measured in Y direction and sat
Scale value when measurement, closes cut-out switch, and when metal probe touches workpiece, limit switch is triggered, and 3D engraving machine stops fortune
Row, reads X, Y, Z coordinate value at this time, which seeks to the coordinate value of measurement, be then turned off cut-out switch, so that it may restore
The operation of 3D engraving machine closes cut-out switch before probe reaches next point to measure next coordinate value again, so that
Limit switch works again.
The beneficial effects of the utility model are as follows:
1, based on being worth thousand yuan or so of 3D engraving machine, to replace the 3 D measuring instrument master of existing value hundreds of thousands member
Body structure drives detecting head to carry out three-dimensional measurement to measured workpiece, by practical survey using the three-dimensional locomotive function of 3D engraving machine
Examination discovery measurement accuracy can reach 2 microns, and three to measured workpiece can also be realized in the case where guaranteeing fundamental measurement precision
Dimension measurement, greatly reduces manufacturing cost, while the relatively existing 3 D measuring instrument volume of the utility model is much smaller, space hold
It is small, when measurement, cut-out switch is closed, when metal probe touches workpiece, limit switch is triggered, and 3D engraving machine stops fortune
Row, reads X, Y, Z coordinate value at this time, which seeks to the coordinate value of measurement, be then turned off cut-out switch, so that it may restore
The operation of 3D engraving machine closes cut-out switch before probe reaches next point to measure next coordinate value again, so that
Limit switch works again, and structure is simple, easy to operate, greatly reduces operation difficulty, practical.
2, when 3D engraving machine works, X-axis motor can drive slide guide component to move left and right along horizontal slide rail, to drive perpendicular
Straight sliding rail, sliding shoe and its detecting head of bottom integrally move left and right, when detecting head is moved to the left or right until its metal is visited
When head touches measured workpiece inner sidewall, the coordinate value can be measured in X-direction, Z axis motor can drive sliding shoe along perpendicular
Straight sliding rail moves up and down, can be in Z axis side when detecting head is moved downwardly until that its metal probe touches bottom in measured workpiece
To the coordinate value is measured, y-axis motor can drive levelling bench and measured workpiece to be integrally moved forward and backward, on the inside of measured workpiece
Wall touches the metal probe of detecting head, can measure the coordinate value in Y direction, structurally reasonable, and measurement accuracy is high, horizontal
Platform quadrangle is connected by screw on pedestal, by adjust this four screws can controlled level platform levelness, this
It is to ensure that the accurate key of measurement.
3, by being correspondingly arranged on a metal probe, each direction in four sides of blocky probe clip and its bottom part down
Individually measured by a metal probe, 3D engraving machine drive detecting head move integrally when, either in the horizontal direction before
After move left and right, or moved down in vertical direction, can be transferred through corresponding metal probe and contacted with measured workpiece, work as metal
Probe can obtain the D coordinates value immediately when contacting with measured workpiece, simultaneous retractable formula probe is squeezed toward contract,
To realize the precise measurement to measured workpiece X, Y, Z axis direction, the cost of the single detecting head compares valence less than unitary
It is worth thousands of ruby probes and greatly reduces use cost, further reduces the manufacturing cost of the utility model.
4, when metal probe contact workpiece, certain opposition can be generated, metal probe and flexible interior bar are whole at this time
Body plays buffer function toward outer tube internal contraction, compressed spring, to avoid damage metal probe, long service life.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of inexpensive 3 D measuring instrument of the utility model；
Fig. 2 is the schematic perspective view of detecting head；
Fig. 3 is the planar structure schematic diagram of detecting head；
Fig. 4 is the surface structure schematic diagram of telescopic probe；
Fig. 5 is the schematic diagram of internal structure of telescopic probe.
Appended drawing reference: 1-3D engraving machine, 2- measured workpiece, 3- levelling bench, 4- detecting head, 4.1- bulk probe centre,
4.1.1- mounting hole, the telescopic probe of 4.2-, 4.2.1- outer tube, 4.2.2- compressed spring, 4.2.3- stretch interior bar, 4.3- metal
Probe, 5- control panel, 6- limit switch, 7- conducting wire A, 8- conducting wire B, 9- cut-out switch, 10- rack, 11- sliding shoe, 12-X axis
Motor, 13-Z spindle motor, 14-Y spindle motor, 15- horizontal slide rail, 16- slide guide component, 17- upright slide rail, 18- pedestal, 19- spiral shell
Nail.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only to explain this
Utility model is not used to limit the utility model, i.e., the described embodiments are only a part of the embodiments of the utility model,
Instead of all the embodiments.The component of the utility model embodiment being usually described and illustrated herein in the accompanying drawings can be with each
Different configurations is planted to arrange and design.
Therefore, requirement is not intended to limit to the detailed description of the embodiments of the present invention provided in the accompanying drawings below
The scope of the utility model of protection, but it is merely representative of the selected embodiment of the utility model.Reality based on the utility model
Apply example, those skilled in the art's every other embodiment obtained without making creative work belongs to
The range of the utility model protection.
It should be noted that the relational terms of term " first " and " second " or the like be used merely to an entity or
Operation is distinguished with another entity or operation, and without necessarily requiring or implying between these entities or operation, there are any
This actual relationship or sequence.Moreover, the terms "include", "comprise" or its any other variant be intended to it is non-exclusive
Property include so that include a series of elements process, method, article or equipment not only include those elements, but also
Further include other elements that are not explicitly listed, or further include for this process, method, article or equipment it is intrinsic
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including described
There is also other identical elements in the process, method, article or equipment of element.
The feature of the utility model and performance are described in further detail with reference to embodiments.
Embodiment 1
As shown in Fig. 1 to 2, the present embodiment provides a kind of inexpensive 3 D measuring instrument, including 3D engraving machine 1,3D engraving machines 1
On be provided with levelling bench 3 for placing measured workpiece 2,3D engraving machine 1 is connected with the detecting head above levelling bench 3
4, measured workpiece 2 and detecting head 4 are electrically conductive, and 3D engraving machine 1 is electrically connected with control panel 5, are provided with limit in control panel 5 and open
6 are closed, limit switch 6 is connected separately with conducting wire A7 and conducting wire B8, and the conducting wire A7 other end is connect with detecting head 4, the conducting wire B8 other end
It is connect with measured workpiece 2, cut-out switch 9 is provided on conducting wire B8.
In the present embodiment, based on being worth thousand yuan or so of 3D engraving machine, to replace the three of existing value hundreds of thousands member
Measuring instrument main structure is tieed up, using the three-dimensional locomotive function of 3D engraving machine, detecting head is driven to carry out three-dimensional measurement to measured workpiece,
2 microns can be reached by actual test discovery measurement accuracy, can also be realized in the case where guaranteeing fundamental measurement precision to quilt
The three-dimensional measurement for surveying workpiece, greatly reduces manufacturing cost, while the relatively existing 3 D measuring instrument of the utility model is small in size very
More, space hold is small, when measurement, closes cut-out switch, and when metal probe touches workpiece, limit switch is triggered, 3D carving
Quarter, machine was out of service, read X, Y, Z coordinate value at this time, which seeks to the coordinate value of measurement, be then turned off cut-out switch,
It can restore the operation of 3D engraving machine to measure next coordinate value, close cutting again before probe reaches next point
Switch, so that limit switch works again, structure is simple, easy to operate, greatly reduces operation difficulty, practicability
By force.
Embodiment 2
As shown in Fig. 1 to 2, the present embodiment is to be further optimized on the basis of embodiment 1, specifically, 3D engraving
Machine 1 includes rack 10, is provided with sliding shoe 11 in rack 10, detecting head 4 is connected to 11 bottom of sliding shoe, is provided in rack 10
The X-axis motor 12 of 11 left and right horizontal of sliding shoe movement is driven, the Z for driving about 11 sliding shoe to vertically move is provided in rack 10
Spindle motor 13,10 bottom of rack are provided with y-axis motor 14, and y-axis motor 14 can drive 3 horizontal shifting of levelling bench, rack
Horizontal slide rail 15 is provided on 10, sliding is provided with slide guide component 16 on horizontal slide rail 15, and X-axis motor 12 can drive slide guide component
16 is mobile, is provided with upright slide rail 17 on slide guide component 16, sliding shoe 11 is slidably arranged on upright slide rail 17, Z axis motor 13
Positioned at 17 top of upright slide rail, 10 lower end of rack is provided with the pedestal 18 that can be slid in 10 bottom of rack, and 3 four jiaos of levelling bench logical
It crosses screw 19 to be connected on pedestal 18, lead screw is provided through in pedestal 18, lead screw is connect by shaft coupling with y-axis motor 14.
In the present embodiment, when 3D engraving machine works, X-axis motor can drive slide guide component to move left and right along horizontal slide rail,
To drive upright slide rail, sliding shoe and its detecting head of bottom integrally to move left and right, when detecting head is moved to the left or right directly
When touching measured workpiece inner sidewall to its metal probe, the coordinate value can be measured in X-direction, Z axis motor can drive cunning
Motion block is moved up and down along upright slide rail, when detecting head is moved downwardly until that its metal probe touches bottom in measured workpiece
When, the coordinate value can be measured in Z-direction, X-axis motor and Z axis motor can drive corresponding portion by screw body here
Part movement, y-axis motor can drive levelling bench and measured workpiece to be integrally moved forward and backward, until measured workpiece inner sidewall touches spy
The metal probe of gauge head can measure the coordinate value in Y direction, structurally reasonable, and measurement accuracy is high, and levelling bench quadrangle is logical
Screw is crossed to be connected on pedestal, by adjust this four screws can controlled level platform levelness, this is to ensure that measurement
An accurate key.
Embodiment 3
As shown in fig. 1 to 4, the present embodiment is further optimized on the basis of embodiment 2, specifically, detecting head 4
Blocky probe clip 4.1 including being connected to 11 bottom of sliding shoe offers the peace for connecting wire A7 on blocky probe clip 4.1
Hole 4.1.1 is filled, four sides and bottom of blocky probe clip 4.1, which extend vertically through, is provided with telescopic probe 4.2, telescopic probe
4.2 are each attached on blocky probe clip 4.1, and the telescopic one end of telescopic probe 4.2 is respectively connected with metal probe 4.3, metal
Four sides and its bottom surface of 4.3 difference face bulk probe clip 4.1 of probe, blocky probe clip 4.1 and telescopic probe 4.2 are
Metal material.
In the present embodiment, visited by being correspondingly arranged on a metal in four sides of blocky probe clip and its bottom part down
Head, each direction are individually measured by a metal probe, when 3D engraving machine drives detecting head to move integrally, are either existed
Horizontal direction all around moves, or moves down in vertical direction, can be transferred through corresponding metal probe and measured workpiece
Contact can obtain the D coordinates value when metal probe is contacted with measured workpiece immediately, and simultaneous retractable formula probe is by crowded
Press toward contract, to realize the precise measurement to measured workpiece X, Y, Z axis direction, the cost of the single detecting head less than
Unitary greatly reduces use cost compared to the ruby probe for being worth thousands of, further reduces the manufacture of the utility model
Cost.
Embodiment 4
As shown in fig. 2 to 4, the present embodiment is further optimized on the basis of embodiment 3, specifically, telescopic
Probe 4.2 includes the outer tube 4.2.1 being fixed on blocky probe clip 4.1, and outer tube 4.2.1 is open at one end, setting in outer tube 4.2.1
There is compressed spring 4.2.2, the flexible interior bar 4.2.3 contacted with compressed spring 4.2.2 is provided in outer tube 4.2.1, interior bar of stretching
4.2.3 the other end stretches out outer tube 4.2.1 opening and connects with corresponding metal probe 4.3.
In the present embodiment, when metal probe contact workpiece, certain opposition can be generated, metal probe and is stretched at this time
Contracting interior bar is whole toward outer tube internal contraction, and compressed spring plays buffer function, to avoid damage metal probe, service life
It is long.
The above, the only preferred embodiment of the utility model, are not intended to limit the utility model, the utility model
Scope of patent protection be subject to claims, it is equivalent made by all specifications and accompanying drawing content with the utility model
Structure change similarly should be included in the protection scope of the utility model.
Claims (6)
1. a kind of low cost 3 D measuring instrument, which is characterized in that including 3D engraving machine (1), be provided with and be used on 3D engraving machine (1)
The levelling bench (3) of measured workpiece (2) is placed, 3D engraving machine (1) is connected with the detecting head (4) above levelling bench (3),
Measured workpiece (2) and detecting head (4) are electrically conductive, and 3D engraving machine (1) is electrically connected with control panel (5), setting in control panel (5)
Limit switches (6), limit switch (6) are connected separately with conducting wire A (7) and conducting wire B (8), conducting wire A (7) other end and detecting head
(4) it connects, conducting wire B (8) other end is connect with measured workpiece (2), and cut-out switch (9) are provided on conducting wire B (8).
2. a kind of inexpensive 3 D measuring instrument according to claim 1, which is characterized in that 3D engraving machine (1) includes rack
(10), it is provided with sliding shoe (11) in rack (10), detecting head (4) is connected to sliding shoe (11) bottom, and rack is arranged on (10)
There is the X-axis motor (12) of drive sliding shoe (11) left and right horizontal movement, is provided in rack (10) and drives sliding shoe (11) up and down
The Z axis motor (13) vertically moved, rack (10) bottom are provided with y-axis motor (14), and y-axis motor (14) can drive levelling bench
(3) horizontal shifting.
3. a kind of inexpensive 3 D measuring instrument according to claim 2, which is characterized in that rack is provided with level on (10)
Sliding rail (15) is slided on horizontal slide rail (15) and is provided with slide guide component (16), and X-axis motor (12) can drive slide guide component (16) to move
It is dynamic, it is provided on slide guide component (16) upright slide rail (17), sliding shoe (11) is slidably arranged on upright slide rail (17), Z axis electricity
Machine (13) is located at the top of upright slide rail (17).
4. a kind of inexpensive 3 D measuring instrument according to claim 2, which is characterized in that rack (10) lower end is provided with can
In the pedestal (18) of rack (10) bottom sliding, levelling bench (3) quadrangle is connected on pedestal (18) by screw (19), pedestal
(18) lead screw is provided through in, lead screw is connect by shaft coupling with y-axis motor (14).
5. a kind of low cost 3 D measuring instrument according to any claim in claim 2 to 4, which is characterized in that visit
Gauge head (4) includes the blocky probe clip (4.1) for being connected to sliding shoe (11) bottom, offers and is used on blocky probe clip (4.1)
The mounting hole (4.1.1) of connecting wire A (7), four sides and bottom of blocky probe clip (4.1) extend vertically through be provided with it is flexible
Formula probe (4.2), telescopic probe (4.2) are each attached on blocky probe clip (4.1), and telescopic probe (4.2) is telescopic
One end is respectively connected with metal probe (4.3), four sides and its bottom of metal probe (4.3) difference face bulk probe clip (4.1)
Face, blocky probe clip (4.1) and telescopic probe (4.2) are metal material.
6. a kind of inexpensive 3 D measuring instrument according to claim 5, which is characterized in that telescopic probe (4.2) includes
The outer tube (4.2.1) being fixed on blocky probe clip (4.1), outer tube (4.2.1) is open at one end, is provided in outer tube (4.2.1)
Compressed spring (4.2.2), outer tube (4.2.1) is interior to be provided with the flexible interior bar (4.2.3) contacted with compressed spring (4.2.2), stretches
The other end of contracting interior bar (4.2.3) stretches out outer tube (4.2.1) opening and connects with corresponding metal probe (4.3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920239252.8U CN209649917U (en) | 2019-02-25 | 2019-02-25 | A kind of low cost 3 D measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920239252.8U CN209649917U (en) | 2019-02-25 | 2019-02-25 | A kind of low cost 3 D measuring instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209649917U true CN209649917U (en) | 2019-11-19 |
Family
ID=68525138
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920239252.8U Expired - Fee Related CN209649917U (en) | 2019-02-25 | 2019-02-25 | A kind of low cost 3 D measuring instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209649917U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113500407A (en) * | 2021-08-17 | 2021-10-15 | 广东豪特曼智能机器有限公司 | Cell-phone center mills and grinds all-in-one with automatic positioning function |
| CN115523908A (en) * | 2022-09-19 | 2022-12-27 | 青岛理工大学 | Real-time mine landslide displacement monitoring equipment |
-
2019
- 2019-02-25 CN CN201920239252.8U patent/CN209649917U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113500407A (en) * | 2021-08-17 | 2021-10-15 | 广东豪特曼智能机器有限公司 | Cell-phone center mills and grinds all-in-one with automatic positioning function |
| CN115523908A (en) * | 2022-09-19 | 2022-12-27 | 青岛理工大学 | Real-time mine landslide displacement monitoring equipment |
| CN115523908B (en) * | 2022-09-19 | 2024-05-28 | 青岛理工大学 | Real-time mine landslide displacement monitoring facilities |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20191119 |