CN209166369U - A kind of passive roof delamination sensor of mining wide range fiber grating - Google Patents
A kind of passive roof delamination sensor of mining wide range fiber grating Download PDFInfo
- Publication number
- CN209166369U CN209166369U CN201920086366.3U CN201920086366U CN209166369U CN 209166369 U CN209166369 U CN 209166369U CN 201920086366 U CN201920086366 U CN 201920086366U CN 209166369 U CN209166369 U CN 209166369U
- Authority
- CN
- China
- Prior art keywords
- slide block
- inclined plane
- plane slide
- fixed
- gear
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Length Measuring Devices By Optical Means (AREA)
Abstract
A kind of passive roof delamination sensor of mining wide range fiber grating, including shell, wirerope idler wheel mechanism, fiber grating strain mechanism；It is characterized by: fiber grating strain mechanism includes second gear, the precision lead screw that one end and second gear are fixed and rotated with second gear；Inclined plane slide block equipped with an inclined-plane, inclined plane slide block are covered on precision lead screw and can be axially moved along lead screw；The position of the foil gauge fixed blocks being fixed on fore bearing support frame, foil gauge fixed blocks is corresponding with inclined plane slide block；Be additionally provided with a FBG strain gauge, one end of FBG strain gauge is fixed by foil gauge fixed blocks, the other end be with the contact of incline plane of inclined plane slide block and can the opposite free end slided, post fiber grating on FBG strain gauge；It pulls the circular motion of idler wheel to become the inclined plane slide block on accurate bar on wirerope to be axially moved, the wavelength change of fiber grating realizes real-time online roof delamination dynamic monitoring.
Description
Technical field
The utility model relates to technical field of coal mine safety detection more particularly to a kind of mining wide range fiber grating are passive
Roof delamination sensor.
Background technique
Optical fiber sensing technology is an important technical basis of a new science and technology and information-intensive society, in the present age
Occupy highly important position in high-tech.Optical fiber sensing technology is or so nineteen seventies with Fibre Optical Communication Technology
Rudiment and set up rapidly, by the way that with this carrier of light wave and optical fiber this medium, playing, there is perception to pass with signal
Defeated New Sensing Technology.Light wave as measured signal carrier and the optical fiber as light wave propagation medium have a series of
Unique, other carriers are difficult to the advantages of comparing with medium.
During monitoring to mine pressure, due to various objective and subjective, and stope is caused to sink, sternly
The production, transport and the personal safety of miner in mine are affected again.There are a considerable amount of mine accidents every year, pushes up
Plate accident is the accident of Coal Transportation most serious, so the prevention for doing roof accident well is current coal production technical management and peace
A highly important project in full management work.
Existing mine pressure detection device is incomplete, and poor anti jamming capability, data transmission capabilities are poor, transmission range is short, can not
Passive real time on-line monitoring, big region detection sensor and the power supply of substation scene are complicated, with the deep mining of mine, it is desirable that prison
It is big to survey roof deformation quantity sensor range, existing transducer range is unable to satisfy live actual needs, and sensing data not can this
Ground uploads etc. that often result in mine safety monitoring not in place in real time.
Sensing technology is application technology popular in recent years, and sensor is towards sensitive, accurate, adaptable, small and exquisite
Develop with the direction of wisdom.In this course, the newcomer of this sensor family of fibre optical sensor gains great popularity.
Summary of the invention
The utility model provides a kind of passive roof delamination sensor of mining wide range fiber grating, which can be remote
Journey monitors early-warning and predicting in real time, and the linear stretch movement of wirerope is passed to optic fiber grating wavelength variation, realizes wirerope
Variable quantity is uploaded and is shown in real time by the variation of optic fiber grating wavelength, and range is big, and precision is high.
The technical solution of the utility model are as follows:
A kind of passive roof delamination sensor of mining wide range fiber grating, including shell, wirerope idler wheel mechanism, optical fiber
Grating strain mechanism；Shell is equipped with fore bearing support frame, center bearing bracket, rear bearing support frame；Wirerope idler wheel mechanism
Including first gear, it is characterised in that: fiber grating strain mechanism includes second gear, and one end and second gear fix and with the
The precision lead screw of two gears rotation；Inclined plane slide block equipped with an inclined-plane, inclined plane slide block cover on precision lead screw and can be along silks
Thick stick is axially moved；The foil gauge fixed blocks being fixed on fore bearing support frame, the position and inclined-plane of foil gauge fixed blocks are sliding
Block is corresponding；It is additionally provided with a FBG strain gauge, one end of FBG strain gauge is fixed by foil gauge fixed blocks, another
End for the contact of incline plane of inclined plane slide block and can the opposite free end slided, post fiber grating on FBG strain gauge；Tiltedly
Face sliding block, which is axially moved, pushes FBG strain gauge radial deformation, FBG strain gauge wavelength change.
Further, for convenience using and convenient for be axially moved, the inclined plane slide block is to be cut into inclined-plane for one side is stupefied
Sides nut.
Further, two panels FBG strain gauge is set, ensure that two panels foil gauge is affected by temperature unanimously, two light
Fiber grating strain piece packaging technology is identical, and the inclined plane slide block is additionally provided with the second inclined-plane, and the second inclined-plane inclines with the first inclined-plane
Rake angle reverse symmetry；The second fiber grating is equipped between the second inclined-plane and the side of corresponding fixed blocks of inclined plane slide block
One end of foil gauge, the second FBG strain gauge is fixed by foil gauge fixed blocks, and the other end is the inclined-plane with inclined plane slide block
The free end that contacts and can slide relatively.
Further, for convenience using and convenient for be axially moved, the inclined plane slide block be by two side it is stupefied be cut into tiltedly
The sides nut in face.
Further, fiber-optic vibration or production process are broken in order to prevent, and the foil gauge fixed blocks are led equipped with optical fiber
To channel.
Further, inclined plane slide block is rotated along precision lead screw in order to prevent, and limitation inclined plane slide block can only be axially moved, and is also set
Have across inclined plane slide block and limit the thin optical axis of anti-rotation that inclined plane slide block can only be axially moved, the anti-thin optical axis of rotation is parallel with precision lead screw
Setting.
Further, the anti-thin optical axis of rotation is simply fixed in order to more convenient, one end of the anti-thin optical axis of rotation is by intermediate bearing branch
Support is fixed, the other end is fixed by foil gauge fixed blocks.
Further, smooth for happy rotation, friction is reduced, is pacified between second gear and inclined plane slide block, against second gear
Equipped with bearing.
Further, in order to move synchronously second gear with precision lead screw, the second gear and precision lead screw interference
Connection.
Further, it in order to move synchronously second gear with precision lead screw, is easily installed, the second gear is covered in essence
One end of close lead screw, is fixed by lock screw.
Further, the sensor is additionally provided with jackshaft, and jackshaft one end is by fore bearing support frame supporting and fixing, another
End is across center bearing bracket and rear bearing support frame.
Further, the wirerope idler wheel mechanism further includes the rolling that is arranged on jackshaft and can rotate relative to jackshaft
Wheel, idler wheel side rigidly fix first gear, and first gear is rotated with idler wheel.
The utility model has the following beneficial effects: technical solution transmission device provided by the utility model uses mechanical gear
Add accurate lead screw principle, pulls the circular motion of idler wheel to become the inclined plane slide block on accurate bar on wirerope and be axially moved, optical fiber
The wavelength change of grating realizes real-time online roof delamination dynamic monitoring, does not need to power to sensor.
Sensor is using fiber grating realization, fiber grating high, passive, electromagnetism interference, insulating properties with measurement accuracy
The excellent performances such as good, essential safety, not only for sensing element but also be information transmission medium, long transmission distance is up to 10 kilometers；
Using double strain chip architectures, the foil gauge of same elastic modulus is mounted on the two sides of foil gauge fixed block, double
Strain gauge adhesion fiber grating, inclined plane slide block are set there are two inclined-plane, two bevel direction reverse symmetries；When inclined plane slide block is in precision
When the screw rod amount of being subjected to displacement, two FBG strain gauges, one wavelength becomes larger, and a wavelength tails off；Two are influenced by temperature
The variable quantity of fiber grating is consistent, realizes temperature-compensating.
Detailed description of the invention
Fig. 1 is the planar structure schematic diagram of sensor provided by the utility model；
Fig. 2 is the schematic perspective view of sensor provided by the utility model；
Fig. 3 is the structural schematic diagram of the second gear of sensor provided by the utility model, precision lead screw and inclined plane slide block；
Fig. 4 is the structural schematic diagram of the inclined plane slide block of sensor provided by the utility model.
In figure, 1. idler wheels, 2. wirerope, 3. first gears, 4. second gears, 5. shells, 6. fore bearing support frames, in 7.
Between bearing supporting frame, 8. rear bearing support frames, 9. jackshafts, 10. precision lead screws, 11. inclined plane slide blocks, 12. first inclined-planes, 13.
Second inclined-plane, 14. foil gauge fixed blocks, 15. first FBG strain gauges, 16. optical fiber are oriented to channel, the 17. anti-thin light of rotation
Axis, 18. lock screws, 19. bearings, 20. second FBG strain gauges.
Specific embodiment
It elaborates with reference to the accompanying drawings and examples to the technical solution of the utility model.
A kind of passive roof delamination sensor of mining wide range fiber grating, including shell, wirerope idler wheel mechanism, optical fiber
Grating strain mechanism.
Referring to Figures 1 and 2, the shell 5 of sensor body includes three support frames, fore bearing support frame 6, intermediate bearing branch
Support 7, rear bearing support frame 8 are mainly used for the internal structure of fixed sensor.
Wirerope idler wheel mechanism includes first gear 3, and fiber grating strain mechanism includes second gear 4, one end and second
The precision lead screw 10 that gear is fixed and rotated with second gear；Inclined plane slide block 11 equipped with an inclined-plane, 11 sets of inclined plane slide block exist
It can be axially moved on precision lead screw and along precision lead screw；The foil gauge fixed blocks 14 being fixed on fore bearing support frame, are answered
The position for becoming piece fixed blocks 14 is corresponding with inclined plane slide block 11；It is additionally provided with a FBG strain gauge 15, fiber grating strain
One end of piece is fixed by foil gauge fixed blocks 14, and the other end is the contact of incline plane with inclined plane slide block and can be relatively free to slide
Fiber grating is posted on FBG strain gauge 15 in free end；Inclined plane slide block, which is axially moved, pushes FBG strain gauge radial
Deformation, FBG strain gauge wavelength change.
Such as Fig. 3, one end of precision lead screw 10 and second gear 4 are fixed, and the other end is free end, and length is greater than inclined plane slide block
Axial movement distance, meet axial movement of the inclined plane slide block along precision lead screw；Preferably, precision lead screw and the second tooth
Wheel interference fit, specifically, one end of accurate lead screw 10, as axis, 4 sets of second gear on this one end of accurate lead screw, pass through
Screw 18 is fixed as an entirety by second gear 4 and accurate lead screw 10, between second gear 4 and inclined plane slide block 11,
Bearing 19 is installed against second gear, bearing 19 is fixed together with center bearing bracket 7；Realize precision lead screw with the
The rotation of three gears and rotate, the two does not have displacement difference.
As shown in Figure 3 and Figure 4, sides nut in the slope, such inclined-plane are specially cut for one side is stupefied in inclined plane slide block 11
Sliding block has the first inclined-plane, and inclined plane slide block covers on precision lead screw, close to second gear, and can axially transport along precision lead screw
It is dynamic；Inclined plane slide block inner hole has screw thread and precision lead screw 10 to cooperate；When rotated, inclined plane slide block 11 is just able to achieve precision lead screw in this way
The axial movement of horizontal direction.The first fiber grating is equipped between the first inclined-plane 12 and corresponding fixed blocks of inclined plane slide block
One end of foil gauge 15, the first FBG strain gauge is fixed by the side on foil gauge fixed blocks inclined surface sliding block inclined-plane,
The other end be with the first contact of incline plane of inclined plane slide block and can the opposite free end slided, post optical fiber on FBG strain gauge
Grating.
Referring to Fig. 4, preferred embodiment, the inclined plane slide block is additionally provided with the second inclined-plane 13, the second inclined-plane 13 and the first inclined-plane
12 tilt angle reverse symmetry；First inclined-plane 12 is from low to high, high close to the side inclined-plane of second gear 4, other side inclined-plane
It is low；Second inclined-plane 13 is from high to low, opposite with the first inclined-plane.Correspondingly, inclined plane slide block 11 is to be cut into inclined-plane for two side is stupefied
Sides nut.
Intelligible, there are two inclined-planes for inclined plane slide block shown in Fig. 4, if one inclined-plane of setting, only by sides nut one
Side is stupefied to be cut into the first inclined-plane 12.
Correspondingly, being equipped with the second fiber grating between the second inclined-plane and the side of corresponding fixed blocks of inclined plane slide block
One end of foil gauge 20, the second FBG strain gauge 20 is fixed by foil gauge fixed blocks, and the other end is and inclined plane slide block
Second contact of incline plane and can opposite sliding free end, post fiber grating on FBG strain gauge.
The initial position of 20 free end of first FBG strain gauge 15 and the second FBG strain gauge is respectively on inclined-plane
13 middle position of 12 low side of the first inclined-plane and the second inclined-plane of sliding block, purpose is when inclined plane slide block moves axially, the first inclined-plane
The first FBG strain gauge deformation of 12 sides is ascending, and the second FBG strain gauge of 13 one side of the second inclined-plane becomes
Shape is descending；Such difference deformation can bring error with compensation temperature.
In order to prevent inclined plane slide block 11 from rotating along precision lead screw, limitation inclined plane slide block can only be moved horizontally axially, be additionally provided with
Across inclined plane slide block and the thin optical axis 17 of anti-rotation that limits inclined plane slide block, be axially moved inclined plane slide block can only, it will be appreciated that, anti-rotation
Thin optical axis is parallel with precision lead screw 10, is the thin axis for passing through inclined plane slide block setting, and one end of the anti-thin optical axis of rotation is by jackshaft
Hold that support frame 7 is fixed, the other end is fixed by foil gauge fixed blocks 14, the anti-thin optical axis of rotation can also be to inclined plane slide block 11 and accurate silk
Thick stick 10 is played a supporting role.
Foil gauge fixed blocks are fixed on fore bearing support frame, and the position of foil gauge fixed blocks is opposite with inclined plane slide block
It answers, it, being capable of horizontal fixed FBG strain gauge such as Fig. 2.
It is additionally provided with optical fiber guiding channel 16 in foil gauge fixed blocks, prevents fiber-optic vibration or production process from breaking, can manage
Solution, the quantity of optical fiber guiding channel can be set according to the quantity of FBG strain gauge, and a FBG strain gauge is set
One optical fiber is oriented to channel, and two FBG strain gauges set two optical fiber guiding channels, and under normal circumstances, optical fiber is oriented to channel
It is located on the side of the fixed FBG strain gauge of foil gauge fixed blocks.
Sensor is additionally provided with jackshaft 9, and jackshaft one end passes through jackshaft by the supporting and fixing of fore bearing support frame, the other end
Hold support frame and rear bearing support frame.
Wirerope idler wheel mechanism further includes the idler wheel 1 that is arranged on jackshaft and can rotate relative to jackshaft, idler wheel side
First gear 3 is rigidly fixed, first gear is rotated with idler wheel, winding wire ropes 2 on idler wheel.
Center bearing bracket 7 is located at the other side of first gear 3, center bearing bracket will not influence first gear and
The rotation of second gear；Mainly serve and supports and fixes.
Sensor also has external component, and external component is equipped with vertical fixed installation bar and fixed anchor fluke, vertical fixed
Mounting rod is tubular structure, and vertical one end that bar is fixedly mounted is used with sensor housing to be screwed；It is vertical that bar is fixedly mounted
Inside prevents external shower water from entering sensor internal using sealing structure is poured, and wirerope is by being vertically fixedly mounted in bar
Portion；One end of wirerope, which passes through, on the idler wheel of deep basic point measurement sensor and shallow foundation point measurement sensor is vertically fixedly mounted bar
Afterwards, steel cord ends are respectively provided with a fixed anchor fluke；Two fixed anchor flukes are respectively installed in the rock mass of top plate (deep base when installation
Point) and coal body in (shallow foundation point).
Wirerope is pulled to drive roller motion when top plate deforms, and then first gear rotates, the engagement of first gear 3 the
Two gears 4, second gear rotation, drive precision lead screw 10 to rotate, and inclined plane slide block 11, which is axially moved, pushes FBG strain gauge
The wirerope extensional motion of wirerope idler wheel mechanism is passed to FBG strain gauge wavelength change by 15 radial deformations, is realized
Data upload monitoring in real time.
It should be understood that the utility model creation is not limited to these examples shown in this article, it is all in the utility model
Spirit and principle within, any modification, equivalent substitution, improvement and etc. done should be included in the protection model of the utility model
Within enclosing.
Claims (12)
1. a kind of passive roof delamination sensor of mining wide range fiber grating, including shell, wirerope idler wheel mechanism, optical fiber light
Grid strain mechanism；Shell (5) is equipped with fore bearing support frame (6), center bearing bracket (7), rear bearing support frame (8)；Steel wire
Idler wheel mechanism of restricting includes first gear (3), it is characterised in that: fiber grating strain mechanism includes second gear (4), one end and the
The precision lead screw (10) that two gears are fixed and rotated with second gear；Inclined plane slide block (11) equipped with an inclined-plane, inclined plane slide block
(11) it covers on precision lead screw (10) and can be axially moved along precision lead screw (10)；The strain being fixed on fore bearing support frame
The position of piece fixed blocks (14), foil gauge fixed blocks (14) is corresponding with inclined plane slide block；The first fiber grating is additionally provided with to answer
Become piece (15), one end of the first FBG strain gauge is fixed by foil gauge fixed blocks, and the other end is oblique with inclined plane slide block
Face contact and can opposite sliding free end, post fiber grating on FBG strain gauge；Inclined plane slide block, which is axially moved, to be pushed
FBG strain gauge radial deformation, FBG strain gauge wavelength change.
2. sensor according to claim 1, it is characterised in that: the inclined plane slide block (11) be by one side it is stupefied be cut into tiltedly
The sides nut in face.
3. sensor according to claim 1, it is characterised in that: the inclined plane slide block is additionally provided with the second inclined-plane (13),
The tilt angle reverse symmetry on the second inclined-plane (13) and the first inclined-plane (12)；In the second inclined-plane and the corresponding fixation of inclined plane slide block
The second FBG strain gauge (20) are equipped between the side of square, one end of the second FBG strain gauge is fixed by foil gauge
Square (14) is fixed, and the other end is the free end for contacting and capable of being slided relatively with the second inclined-plane (13) of inclined plane slide block.
4. sensor according to claim 3, it is characterised in that: the inclined plane slide block (11) is to be cut into two side is stupefied
The sides nut on inclined-plane.
5. sensor according to claim 1, it is characterised in that: the foil gauge fixed blocks are equipped with optical fiber and are oriented to channel
(16).
6. sensor according to claim 1, it is characterised in that: be additionally provided with across inclined plane slide block and limit inclined plane slide block only
The thin optical axis of anti-rotation (17) that can be axially moved, the anti-thin optical axis (17) of rotation are arranged in parallel with precision lead screw (10).
7. sensor according to claim 6, it is characterised in that: one end of the anti-thin optical axis (17) of rotation is supported by intermediate bearing
Frame (7) is fixed, the other end is fixed by foil gauge fixed blocks (14).
8. sensor according to claim 1, it is characterised in that: between second gear and inclined plane slide block, abut the second tooth
Wheel is equipped with bearing (19).
9. sensor according to claim 1, it is characterised in that: the second gear (4) and precision lead screw (10) interference
Connection.
10. sensor according to claim 9, it is characterised in that: the second gear is covered in one end of precision lead screw, by
Lock screw (18) is fixed.
11. sensor described in -10 any claim books according to claim 1, it is characterised in that: the sensor is additionally provided with
Jackshaft (9), jackshaft one end pass through center bearing bracket and rear bearing branch by the supporting and fixing of fore bearing support frame, the other end
Support.
12. sensor according to claim 11, it is characterised in that: the wirerope idler wheel mechanism further includes being arranged in
Between on axis and the idler wheel (1) that can be rotated relative to jackshaft, idler wheel side rigidly fixes first gear (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920086366.3U CN209166369U (en) | 2019-01-18 | 2019-01-18 | A kind of passive roof delamination sensor of mining wide range fiber grating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920086366.3U CN209166369U (en) | 2019-01-18 | 2019-01-18 | A kind of passive roof delamination sensor of mining wide range fiber grating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209166369U true CN209166369U (en) | 2019-07-26 |
Family
ID=67328628
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920086366.3U Expired - Fee Related CN209166369U (en) | 2019-01-18 | 2019-01-18 | A kind of passive roof delamination sensor of mining wide range fiber grating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209166369U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109596060A (en) * | 2019-01-18 | 2019-04-09 | 山东道宽智能科技有限公司 | A kind of mining roof plate absciss layer sensor |
| CN109631791A (en) * | 2019-01-18 | 2019-04-16 | 山东道宽智能科技有限公司 | A kind of passive roof delamination sensor of mining wide range fiber grating |
| CN109855556A (en) * | 2019-01-18 | 2019-06-07 | 山东道宽智能科技有限公司 | A kind of passive visual roof delamination sensor of mining wide range fiber grating |
-
2019
- 2019-01-18 CN CN201920086366.3U patent/CN209166369U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109596060A (en) * | 2019-01-18 | 2019-04-09 | 山东道宽智能科技有限公司 | A kind of mining roof plate absciss layer sensor |
| CN109631791A (en) * | 2019-01-18 | 2019-04-16 | 山东道宽智能科技有限公司 | A kind of passive roof delamination sensor of mining wide range fiber grating |
| CN109855556A (en) * | 2019-01-18 | 2019-06-07 | 山东道宽智能科技有限公司 | A kind of passive visual roof delamination sensor of mining wide range fiber grating |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109631791A (en) | A kind of passive roof delamination sensor of mining wide range fiber grating | |
| CN209166369U (en) | A kind of passive roof delamination sensor of mining wide range fiber grating | |
| CN201903305U (en) | Gateway roof separation observation device | |
| CN111457864B (en) | Coal mining machine rocker arm angle detection device and method based on optical fiber sensing | |
| CN109764830B (en) | Omnibearing sensitization inclination sensor of fiber bragg grating | |
| CN209166367U (en) | A kind of mining roof plate absciss layer sensor | |
| CN105157577A (en) | Optical fiber grating sensor for engineering displacement measurement | |
| CN109596060A (en) | A kind of mining roof plate absciss layer sensor | |
| CN104330035A (en) | Precise vertical type length gauge | |
| CN207336559U (en) | Laser fiber tachogenerator, Boolean value output sensor | |
| CN112924069A (en) | Self-tensioning rope servo traction measuring device | |
| CN102486476A (en) | Monitoring apparatus for wind speed and wind direction | |
| CN213067478U (en) | Double-fiber grating tilt angle sensor based on sliding block bearing | |
| CN213748280U (en) | Optical fiber passive roof separation instrument | |
| CN107957502A (en) | Laser fiber tachogenerator, Boolean value output sensor and measuring method | |
| CN207850362U (en) | A kind of varifocal angle adjustable pries through inclinometer | |
| CN203672331U (en) | Separation apparatus for monitoring rock roof deformation | |
| CN115493502A (en) | Fiber grating displacement sensor device | |
| CN111060032B (en) | Optical fiber grating inclinometer | |
| CN203518992U (en) | Reel static settlement detection device of combine harvester | |
| CN113639649A (en) | Strain type roof separation layer sensor based on fiber bragg grating | |
| CN212363080U (en) | Large-deformation displacement sensor | |
| CN101358870B (en) | Digital absolute code optical fiber liquid level sensor | |
| CN212620748U (en) | Novel civil engineering measure device | |
| CN1283981C (en) | Oil and water content and profile fiber sensor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200519 Address after: 250000 Shandong Province Licheng District Tangwang Town Shuangyong Road and Longquan Street Intersection South 10 meters east Co-patentee after: Shandong Guang'an Intelligent Technology Co., Ltd Patentee after: SHANDONG DAOKUAN INTELLIGENT TECHNOLOGY Co.,Ltd. Address before: 250000 Shandong Province Licheng District Tangwang Town Shuangyong Road and Longquan Street Intersection South 10 meters east Patentee before: SHANDONG DAOKUAN INTELLIGENT TECHNOLOGY Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190726 Termination date: 20210118 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |