CN215066653U - Ground crack geological disaster measuring device - Google Patents
Ground crack geological disaster measuring device Download PDFInfo
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- CN215066653U CN215066653U CN202121001897.1U CN202121001897U CN215066653U CN 215066653 U CN215066653 U CN 215066653U CN 202121001897 U CN202121001897 U CN 202121001897U CN 215066653 U CN215066653 U CN 215066653U
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- 239000007788 liquid Substances 0.000 claims abstract description 10
- 238000013016 damping Methods 0.000 claims description 24
- 230000000694 effects Effects 0.000 claims description 16
- 239000005341 toughened glass Substances 0.000 claims description 12
- 230000035939 shock Effects 0.000 claims description 5
- 238000005496 tempering Methods 0.000 claims description 5
- 238000005259 measurement Methods 0.000 abstract description 13
- 238000000034 method Methods 0.000 abstract description 3
- 230000000149 penetrating effect Effects 0.000 description 8
- 239000007787 solid Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 6
- 239000002689 soil Substances 0.000 description 6
- 230000008859 change Effects 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 4
- 238000005070 sampling Methods 0.000 description 3
- 206010021118 Hypotonia Diseases 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 208000017561 flaccidity Diseases 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000691 measurement method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
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- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The utility model discloses a ground fissure geological disaster measuring device, belonging to the technical field of ground fissure measurement; a geological disaster measuring device for ground cracks comprises a main body, wherein a connecting column is fixedly connected to the lower surface of the main body, a fixed base is fixedly connected to the lower surface of the connecting column, a transparent measuring cup is fixedly connected to the upper surface of the main body, thick liquid is arranged inside the transparent measuring cup, a connecting block is fixedly connected to one side of the outer surface of the main body, a fixed rod is fixedly connected to the inside of the connecting block, and a magnet strip is fixedly connected to the outer surface of one end of the fixed rod; the utility model discloses effectively solved current ground fissure's measurement needs fix measuring instrument respectively in both sides, if the crack broad, measuring instrument's fixed has just become the difficulty, and present measuring method need repeat multiple measurements for accurate figure and get the average value, and multiple measurements can consume the problem of a large amount of time and energy.
Description
Technical Field
The utility model relates to a ground crack measures technical field, specifically is a ground crack geological disasters measuring device.
Background
The ground fissure is a geological phenomenon that the rock and soil on the ground surface are cracked under the action of natural or artificial factors and form a fissure with a certain length and width on the ground, and when the phenomenon occurs in an area with human activities, the geological disaster can be caused. In cities, major cities such as Xian, Daqiang, Handan, Baodin, Shijiazhuang, Tianjin, Zibo and the like have ground cracks, wherein the most typical and serious situation is that the position of the ground crack is changed frequently, and the development and change of the ground crack can influence the safety of normal mine production, traffic roads and surface buildings, so that the change trend of the ground crack can be mastered, the ground crack is an important basis for engineering technicians to take corresponding precautionary and reinforcement measures in time, and the deformation monitoring of the engineering ground crack is very important.
Because the existing ground fissure measurement needs to fix the measuring instruments on two sides respectively, if the fissure is wide, the measuring instruments are difficult to fix, the existing measurement method needs to repeat multiple times of measurement and average value for accurate figures, the multiple times of measurement can consume a large amount of time and energy, the data of the ground fissure vertical measurement is also beneficial to the judgment of ground fissure change detection, and the existing design cannot simply and quickly obtain accurate data.
SUMMERY OF THE UTILITY MODEL
1. The to-be-solved technical problem of the utility model
An object of the utility model is to provide a ground crack geological disasters measuring device to solve the problem that proposes in the above-mentioned background art:
the existing ground crack measurement needs to fix measuring instruments on two sides respectively, if the crack is wide, the measuring instruments are difficult to fix, and the existing measurement method needs to repeat multiple measurements to obtain an average value for accurate figures, so that the problem that a large amount of time and energy are consumed for the multiple measurements.
2. Technical scheme
In order to achieve the above object, the utility model provides a following technical scheme:
a geological disaster measuring device for ground fissure comprises a main body, wherein a connecting column is fixedly connected to the lower surface of the main body, a fixed base is fixedly connected to the lower surface of the connecting column, a transparent measuring cup is fixedly connected to the upper surface of the main body, thick liquid is arranged in the transparent measuring cup, a connecting block is fixedly connected to one side of the outer surface of the main body, a fixed rod is fixedly connected to the inside of the connecting block, a magnet strip is fixedly connected to the outer surface of one end of the fixed rod, two magnet strips are connected together, a telescopic rod is movably connected to the inside of the fixed rod, rotating blocks are movably connected to the front side and the rear side of the telescopic rod, a penetrating block is fixedly connected to the rear surface of each rotating block, a fixed ring is movably sleeved on the outer surface of each penetrating block, a connecting rod is fixedly connected to one side of the outer surface of each penetrating block, and a clamping ring is arranged on the outer surface of each connecting rod, the other end fixedly connected with protection piece of connecting rod, one side of protection piece surface is provided with toughened glass, toughened glass's inside fixed mounting has the laser hole.
Preferably, the upper surface of the fixed base is provided with a connecting groove, the lower surface of the middle part of the fixed base is fixedly connected with a fixed rod, the lower surfaces of the four ends of the fixed base are fixedly connected with a fixed column, the lower surface of the fixed column is fixedly connected with a first fixed plate, the outer surface of the fixed column is movably sleeved with a damping groove, the lower surface of the first fixed plate is fixedly connected with a telescopic column, the lower surface of the telescopic column is movably sleeved with a sleeved column, the outer surface of the telescopic column is provided with a damping spring, the lower surface of the sleeved column is fixedly connected with a second fixed plate, the outer surface of the second fixed plate is fixedly connected with a fixed fixture block, the inner part of the fixed fixture block is movably sleeved with a damping rod, the other end of the damping rod is movably sleeved with a connecting button, one side of the outer surface of the connecting button is clamped with a reset spring, the outer surface of the damping groove is fixedly connected with a rubber block, and a tempered plate is arranged at the bottom end inside the rubber block.
Preferably, the outer fixed surface of dead lever one end is connected with the magnet strip, another magnet strip of outer fixed surface connection of the protection piece other end, one side fixed mounting of protection piece surface has toughened glass, toughened glass's inside fixed mounting has the laser hole, the middle part fixedly connected with connecting rod of protection piece surface opposite side, the telescopic link activity is in the inside of dead lever.
Preferably, the front and back surface of telescopic link all is provided with solid fixed ring, run through the piece activity and run through in solid fixed ring's inside, the front fixed surface who runs through the piece is connected with the turning block, the back fixed surface who runs through the piece is connected with the connecting rod, the surface of connecting rod is provided with the snap ring, the surface of snap ring is seted up slottedly, the diameter of connecting rod is less than the diameter size in groove, the diameter of turning block is greater than the size of solid fixed ring diameter.
Preferably, the fixed fixture block has eight even fixed connection in the surface of first fixed plate and second fixed plate, the lower surface activity of spliced pole is cup jointed in the inside of spread groove, the length of fixed stick is longer than the length of fixed column, the rubber piece adopts the rubber material, the inside bottom of rubber piece is provided with the tempering board.
3. Advantageous effects
(1) When the utility model is used, firstly, the determining device is in a horizontal state, a wood board vertical to the ground is erected on the other side of a ground fissure, then the switch is pressed, after the protection block receives a signal, the laser hole fixedly installed in the toughened glass emits laser rays, the operation is repeated for many times, the device calculates and obtains an average value according to the time from the laser to the opposite bank to obtain an accurate numerical value, in order to measure the depth in the vertical direction, the button is pressed, the telescopic rod can move outwards from the inside of the fixed rod, the snap ring can rotate, one end of the thick liquid is fixedly connected with the protection block, the connecting rod can drive the penetrating block and the rotating block to rotate downwards to pass through the groove arranged on the outer surface of the snap ring due to gravity, so that the laser hole is vertical to the ground, and a user can obtain the depths of different positions by continuously adjusting the length of the telescopic rod and the position of the main body, after using, can inter attraction between the magnet strip, prevent that the dust from getting into inside, the user can obtain accurate data according to simple measurement, has saved a large amount of manpower and materials, has avoided ground crack edge soil flaccidity to probably produce the possibility of collapsing simultaneously.
(2) When the utility model is used, the device is placed on the ground to step on the fixed base downwards, so that the fixed rod is inserted into a deeper position, after the fixed rod is inserted to a certain degree, the ground can generate relative pressure to the rubber block, the rubber block adopts rubber materials with better ground gripping performance, the rubber block is internally provided with a layer of steel plate which can play a role of wear resistance, the pressure generated by the fixed column at each corner due to uneven ground is different, when the horizontal position is adjusted, the telescopic column can move up and down in the sleeve column, the connecting rod can also compress to a certain degree, the damping rod movably connected with the fixed clamping block on the outer surface of the second fixed plate and the first fixed plate can push the connecting button to move inwards to compress the reset spring, the fixed column can move in the damping groove, after the fixed rod is fixed, whether the thick liquid in the transparent measuring cup keeps parallel with the scale or not can be observed to determine whether the thick liquid is in the parallel position, simultaneously can be better fixed on soft soil, damping spring and reset spring can prevent that pressure from too big leading to the fixed column fracture, play the effect of buffering and reseing, prevent to cause the damage of stationary part among the fixed process.
To sum up, the utility model discloses on the basis of unmanned aerial vehicle main part, through mutually supporting of first pneumatic cylinder, multistage telescopic link, actuating mechanism, the sampling mechanism that creeps into, sample storage mechanism and rotatory switching mechanism, effectively solved that current design can't accurately reach the sampling place fast and can't the stable stay fix on the solid useless surface of unevenness and can't carry out the problem of sampling work to the solid useless of the different degree of depth as required.
Drawings
Fig. 1 is a schematic structural view of a device for measuring geological disasters of ground cracks according to the present invention;
fig. 2 is a schematic view of the telescopic rod structure in fig. 1 of the device for measuring geological disasters of ground cracks of the utility model;
fig. 3 is a cross-sectional view of the telescopic rod in fig. 2 of the device for measuring geological disasters of ground cracks of the utility model;
fig. 4 is a schematic structural view of the fixing base in fig. 1 of the device for measuring geological disasters of ground cracks of the utility model;
fig. 5 is the utility model provides a cross-sectional view of fixed column in ground crack geological disaster measuring device figure 1.
The reference numbers in the figures illustrate:
1. a main body; 2. connecting columns; 3. a transparent measuring cup; 4. a thick liquid; 5. connecting blocks; 6. fixing the rod; 7. a fixed base; 8. fixing a column; 9. a fixing rod; 10. connecting grooves; 11. a rubber block; 12. a magnet bar; 13. rotating the block; 14. a connecting rod; 15. a protection block; 16. tempering the glass; 17. laser holes; 18. a fixing ring; 19. a through block; 20. a snap ring; 21. a first fixing plate; 22. a damping groove; 23. a telescopic column; 24. a damping spring; 25. sleeving the column; 26. A second fixing plate; 27. a return spring; 28. a connecting button; 29. fixing the fixture block; 30. a shock-absorbing lever; 31. tempering the plate; 32. a telescopic rod.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example 1:
a geological disaster measuring device for ground fissure comprises a main body 1, a connecting column 2 is fixedly connected to the lower surface of the main body 1, a fixed base 7 is fixedly connected to the lower surface of the connecting column 2, a transparent measuring cup 3 is fixedly connected to the upper surface of the main body 1, thick liquid 4 is arranged in the transparent measuring cup 3, a connecting block 5 is fixedly connected to one side of the outer surface of the main body 1, a fixed rod 6 is fixedly connected to the inside of the connecting block 5, a magnet strip 12 is fixedly connected to the outer surface of one end of the fixed rod 6, two magnet strips 12 are connected together, a telescopic rod 32 is movably connected to the inside of the fixed rod 6, rotating blocks 13 are movably connected to the front side and the rear side of the telescopic rod 32, a penetrating block 19 is fixedly connected to the rear surface of the rotating block 13, a fixed ring 18 is movably sleeved on the outer surface of the penetrating block 19, a connecting rod 14 is fixedly connected to one side of the outer surface of the penetrating block 19, and a clamping ring 20 is arranged on the outer surface of the connecting rod 14, the other end fixedly connected with protection piece 15 of connecting rod 14, one side of protection piece 15 surface is provided with toughened glass 16, and the inside fixed mounting of toughened glass 16 has laser hole 17.
The outer fixed surface of dead lever 6 one end is connected with magnet strip 12, and the outer fixed surface of the other end of protection piece 15 is connected another magnet strip 12, and one side fixed mounting of protection piece 15 surface has toughened glass 16, and the inside fixed mounting of toughened glass 16 has laser hole 17, and the middle part fixedly connected with connecting rod 14 of the protection piece 15 surface opposite side, telescopic link 32 activity is in the inside of dead lever 6.
The front and back surface of telescopic link 32 all is provided with solid fixed ring 18, runs through the inside that piece 19 activity runs through in solid fixed ring 18, and the front fixed surface who runs through piece 19 is connected with turning block 13, and the back fixed surface who runs through piece 19 is connected with connecting rod 14, and the surface of connecting rod 14 is provided with snap ring 20, and slotted is seted up to snap ring 20's surface, and the diameter of connecting rod 14 is less than the diameter size in groove, and the diameter of turning block 13 is greater than the size of solid fixed ring 18 diameter.
When the utility model is used, firstly, the device is determined to be in a horizontal state, a wood board perpendicular to the ground is erected on the other side of a ground fissure, then a switch is pressed, after a signal is received by the protection block 15, the laser hole 17 fixedly installed in the toughened glass 16 emits laser rays, the operation is repeated for many times, the device calculates the average value according to the time from laser to the opposite bank to obtain an accurate numerical value, in order to measure the depth in the vertical direction, a button is pressed, the telescopic rod 32 can move outwards from the inside of the fixed rod 6, the snap ring 20 can rotate for 90 degrees, one end of the thick liquid 4 is fixedly connected with the protection block 15, the connecting rod 14 can drive the penetrating block 19 and the rotating block 13 to rotate downwards to pass through the groove formed on the outer surface of the snap ring 20 due to gravity, so that the laser hole 17 is perpendicular to the ground, a user can obtain the depths of different positions by continuously adjusting the length of the telescopic rod 32 and the position of the main body 1, after using up, can inter attraction between magnet strip 12, prevent that the dust from getting into inside, the user can obtain accurate data according to simple measurement, has saved a large amount of manpower and materials, has avoided ground crack edge soil flaccidity to produce the possibility of collapsing simultaneously.
Example 2: the basis for combining embodiment 1 is different in that,
the upper surface of the fixed base 7 is provided with a connecting groove 10, the lower surface of the middle part of the fixed base 7 is fixedly connected with a fixed rod 9, the lower surfaces of four ends of the fixed base 7 are fixedly connected with a fixed column 8, the lower surface of the fixed column 8 is fixedly connected with a first fixed plate 21, the outer surface of the fixed column 8 is movably sleeved with a damping groove 22, the lower surface of the first fixed plate 21 is fixedly connected with a telescopic column 23, the lower surface of the telescopic column 23 is movably sleeved with a sleeved column 25, the outer surface of the telescopic column 23 is provided with a damping spring 24, the lower surface of the sleeved column 25 is fixedly connected with a second fixed plate 26, the outer surface of the second fixed plate 26 is fixedly connected with a fixed fixture block 29, the inner part of the fixed fixture block 29 is movably sleeved with a damping rod 30, the other end of the damping rod 30 is movably sleeved with a connecting button 28, one side of the outer surface of the connecting button 28 is clamped with a reset spring 27, the outer surface of the damping groove 22 is fixedly connected with a rubber block 11, the bottom end inside the rubber block 11 is provided with a tempered plate 31.
Fixed fixture block 29 has the surface of eight even fixed connection in first fixed plate 21 and second fixed plate 26, the inside swing joint of fixed fixture block 29 has shock-absorbing rod 30, connect the upper and lower both ends of button 28 and connect respectively in the other end of shock-absorbing rod 30, connect button 28 has four, the inboard surface joint of connecting button 28 has reset spring 27, damping spring 24's last fixed surface connects in the lower surface of first fixed plate 21, damping spring 24's lower fixed surface connects in the upper surface of second fixed plate 26, the diameter of flexible post 23 slightly is less than cover splicing column 25, flexible post 23 activity cup joints in the inside of cover splicing column 25, the lower fixed surface of fixed column 8 connects in the upper surface of first fixed plate 21, the lower fixed surface of second fixed plate 26 connects in the upper surface of shock attenuation groove 22.
The lower surface activity of spliced pole 2 is cup jointed in the inside of spread groove 10, and the length of fixed rod 9 is longer than the length of fixed column 8, and rubber block 11 adopts the rubber material, and the inside bottom of rubber block 11 is provided with tempering board 31
The utility model discloses when using, place the device and step on unable adjustment base 7 downwards on the soil, make fixed rod 9 insert great depths, after inserting the certain degree, ground can produce relative pressure to block rubber 11, block rubber 11 adopts rubber material to have better ground nature of grabbing, there is the one deck steel sheet inside of block rubber 11, can play wear-resisting effect, because the uneven ground is also different to the pressure of the fixed column 8 production in every corner, when adjusting horizontal position, flexible post 23 can be in the inside activity from top to bottom of cup jointing post 25, connecting rod 14 also can carry out the compression of certain degree, the shock attenuation pole 30 of the fixed fixture block 29 swing joint of second fixed plate 26 and first fixed plate 21 surface can promote and connect button 28 to inside removal compression reset spring 27, fixed post 8 is at the inside activity of damping slot 22, after fixed, whether can observe inside thick liquid 4 of transparent graduated flask 3 and whether scale keep parallel to confirm to be in flat level The line position can be better fixed on soft soil simultaneously, and damping spring 24 and reset spring 27 can prevent that pressure from too big leading to the fixed column 8 fracture, play the effect of buffering and reseing, prevent to cause the damage of stationary part among the fixed process.
The above description is only the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution and the improvement concept of the present invention within the technical scope disclosed in the present invention.
Claims (5)
1. The utility model provides a ground crack geological disaster measuring device, includes main part (1), its characterized in that: the lower surface of the main body (1) is fixedly connected with a connecting column (2), the lower surface of the connecting column (2) is fixedly connected with a fixed base (7), the upper surface of the main body (1) is fixedly connected with a transparent measuring cup (3), the interior of the transparent measuring cup (3) is provided with thick liquid (4), one side of the outer surface of the main body (1) is fixedly connected with a connecting block (5), the interior of the connecting block (5) is fixedly connected with a fixed rod (6), the interior of the fixed rod (6) is movably connected with a telescopic rod (32), the front side and the rear side of the telescopic rod (32) are both movably connected with rotating blocks (13), the rear surface of each rotating block (13) is fixedly connected with a through block (19), the outer surface of each through block (19) is movably sleeved with a fixed ring (18), and one side of the outer surface of each through block (19) is fixedly connected with a connecting rod (14), the surface of connecting rod (14) is provided with snap ring (20), the other end fixedly connected with protection piece (15) of connecting rod (14), the external fixed surface of dead lever (6) one end is connected with magnet strip (12), another magnet strip (12) of external fixed surface connection of the protection piece (15) other end, two magnet strip (12) link together, one side of protection piece (15) surface is provided with toughened glass (16), the inside fixed mounting of toughened glass (16) has laser hole (17).
2. A fracture geological disaster measuring device according to claim 1, characterized in that: the upper surface of the fixed base (7) is provided with a connecting groove (10), the lower surface of the middle part of the fixed base (7) is fixedly connected with a fixed rod (9), the lower surfaces of the four ends of the fixed base (7) are fixedly connected with fixed columns (8), the lower surface of each fixed column (8) is fixedly connected with a first fixed plate (21), the outer surface of each fixed column (8) is movably sleeved with a damping groove (22), the lower surface of each first fixed plate (21) is fixedly connected with a telescopic column (23), the lower surface of each telescopic column (23) is movably sleeved with a sleeving column (25), the outer surface of each telescopic column (23) is provided with a damping spring (24), the lower surface of each sleeving column (25) is fixedly connected with a second fixed plate (26), the outer surface of each second fixed plate (26) is fixedly connected with a fixed clamping block (29), and the inner part of each fixed clamping block (29) is movably sleeved with a damping rod (30), the other end activity of shock attenuation pole (30) has cup jointed connecting button (28), one side joint of connecting button (28) surface has reset spring (27), the fixed surface of shock attenuation groove (22) is connected with block rubber (11), the inside bottom of block rubber (11) is provided with tempering board (31).
3. A fracture geological disaster measuring device according to claim 1, characterized in that: the outer surface of the clamping ring (20) is provided with a groove, the diameter of the connecting rod (14) is smaller than that of the groove, and the diameter of the rotating block (13) is larger than that of the fixing ring (18).
4. A fracture geological disaster measuring device according to claim 2, characterized in that: fixed fixture block (29) has the surface of eight even fixed connection in first fixed plate (21) and second fixed plate (26), connect button (28) to have four, the inboard surface joint of connecting button (28) has reset spring (27), the last fixed surface of damping spring (24) is connected in the lower surface of first fixed plate (21), the lower fixed surface of damping spring (24) is connected in the upper surface of second fixed plate (26), the lower fixed surface of second fixed plate (26) is connected in the upper surface of shock attenuation groove (22), the diameter of flexible post (23) slightly is less than and overlaps grafting post (25), flexible post (23) activity cup joints in the inside of overlapping grafting post (25).
5. A fracture geological disaster measuring device according to claim 2, characterized in that: the lower surface of the connecting column (2) is movably sleeved inside the connecting groove (10), the length of the fixing rod (9) is longer than that of the fixing column (8), and the rubber block (11) is made of rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121001897.1U CN215066653U (en) | 2021-05-10 | 2021-05-10 | Ground crack geological disaster measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121001897.1U CN215066653U (en) | 2021-05-10 | 2021-05-10 | Ground crack geological disaster measuring device |
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| Publication Number | Publication Date |
|---|---|
| CN215066653U true CN215066653U (en) | 2021-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121001897.1U Expired - Fee Related CN215066653U (en) | 2021-05-10 | 2021-05-10 | Ground crack geological disaster measuring device |
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| Country | Link |
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| CN (1) | CN215066653U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114509010A (en) * | 2022-02-16 | 2022-05-17 | 山东省地质矿产勘查开发局第一地质大队（山东省第一地质矿产勘查院） | Geological disaster crack measuring device |
-
2021
- 2021-05-10 CN CN202121001897.1U patent/CN215066653U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114509010A (en) * | 2022-02-16 | 2022-05-17 | 山东省地质矿产勘查开发局第一地质大队（山东省第一地质矿产勘查院） | Geological disaster crack measuring device |
| CN114509010B (en) * | 2022-02-16 | 2024-05-10 | 山东省地质矿产勘查开发局第一地质大队（山东省第一地质矿产勘查院） | Geological disaster crack measuring device |
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Granted publication date: 20211207 |