CN107883197A - A kind of line leakage sensor - Google Patents
A kind of line leakage sensor Download PDFInfo
- Publication number
- CN107883197A CN107883197A CN201610874925.8A CN201610874925A CN107883197A CN 107883197 A CN107883197 A CN 107883197A CN 201610874925 A CN201610874925 A CN 201610874925A CN 107883197 A CN107883197 A CN 107883197A
- Authority
- CN
- China
- Prior art keywords
- sensor
- external member
- semicircle external
- present
- leakage
- 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.)
- Pending
Links
- 239000000835 fiber Substances 0.000 claims abstract description 28
- 239000013307 optical fiber Substances 0.000 claims abstract description 15
- 238000012544 monitoring process Methods 0.000 abstract description 7
- 238000005259 measurement Methods 0.000 abstract description 4
- 230000035945 sensitivity Effects 0.000 abstract description 4
- 238000004891 communication Methods 0.000 abstract description 2
- 230000003287 optical effect Effects 0.000 abstract description 2
- 230000005540 biological transmission Effects 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 5
- 238000001514 detection method Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000001755 vocal effect Effects 0.000 description 3
- 238000011160 research Methods 0.000 description 2
- 230000032258 transport Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004807 localization Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/02—Preventing, monitoring, or locating loss
- F17D5/06—Preventing, monitoring, or locating loss using electric or acoustic means
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The present invention provides a kind of line leakage sensor, including 2 semicircle external members, sensor fibre is provided with the semicircle external member, the semicircle external member both ends are arranged with a connection straight panel, bolt connecting hole is equipped with the connection straight panel, it is bolted, one of them semicircle external member is provided with annular perforations, and the sensor fibre passes connection measuring system by annular perforations.The present invention provides a kind of novel optical fiber ring sensor, monitoring sensor is directly clamped and installed on pipeline by the present invention, it is fused to along pipeline laying direction on transmission cable, it is possible to achieve distributed measurement, general single mode communications optical cable can both realize collecting sensor signal.Cost is low, and durability is strong, makes simple, high sensitivity, and positioning precision is high, anti-interference is good.
Description
Technical field
The invention belongs to field of sensing technologies, more particularly, to a kind of line leakage sensor.
Background technology
It is a kind of economic method that long range fluid line, which transports, already the extensive use in the world and China's industry.But
For various reasons, pipe leakage accident happens occasionally.This not only brings serious economic loss to country and enterprise, also to ring
Serious pollution is caused in border, or even triggers large area disaster.Therefore, the prevention to pipe leakage and and alarm, leakage point
Positioning and the calculating of leak sizes have particularly important realistic meaning.The external research to Discussion on Pipe Leakage Detection Technology is compared
It is early, such as U.S., Britain, France, since the age in last century, it has been mounted with leak detection in many oil-gas pipeline systems
System.It is domestic at present also without one and China's convection body Discussion on Pipe Leakage Detection Technology since the age in last century is just is studied
Individual longtime running, the liquid-transport pipe-line monitoring system that integrates leakage detection and localization.Therefore research meets China's woven hose
The leakage detecting sensor system of line actual conditions is of practical significance very much.
For various reasons, pipe leakage accident happens occasionally, economic loss caused by order to reduce pipe leakage, and
Seriously polluted to caused by environment, it is necessary to which line leakage technology is studied.Existing monitoring device and monitoring side
Method, or it is expensive, or maintenance difficult, or normal operation is influenceed, all it is undesirable for long-distance transport pipes.
The content of the invention
In view of this, the present invention is directed to propose a kind of line leakage sensor, it is possible to achieve distributed measurement, commonly
Single mode communication optical cable can realize collecting sensor signal, and cost is low, and durability is strong.
To reach above-mentioned purpose, the technical proposal of the invention is realized in this way：
A kind of line leakage sensor, including 2 semicircle external members, the semicircle external member is interior to be provided with sense light
Fibre, the semicircle external member both ends are arranged with a connection straight panel, bolt connecting hole are equipped with the connection straight panel,
The semicircle external member both ends are equipped with annular perforations, and the sensor fibre is passed by annular perforations leaves tail optical fiber.
Further, the sensor fibre uses single-mode fiber.
Further, the tail optical fiber connection Mach-Zahnder interference system.
Relative to prior art, a kind of line leakage sensor of the present invention has the advantage that：The present invention
A kind of novel optical fiber ring sensor is provided, optical fiber is fastened around on pipeline, because pipe leakage can produce vibration and noise,
Sensor automatic identification vocal print signal, is positioned to leakage point.According to pipeline leakage noise profile and phase property identification pipe
Road leaks and determines the position of leakage point；Simple, high sensitivity, the cost of the invention of making is cheap, and positioning precision is high, anti-interference
It is good.
Brief description of the drawings
The accompanying drawing for forming the part of the present invention is used for providing a further understanding of the present invention, schematic reality of the invention
Apply example and its illustrate to be used to explain the present invention, do not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is a kind of structural representation of line leakage sensor described in the embodiment of the present invention；
Fig. 2 is the structural representation described in the embodiment of the present invention during a kind of line leakage sensor clamping pipe；
Fig. 3 is the sensor distributed measurement schematic diagram described in the embodiment of the present invention；
Description of reference numerals：
1- semicircle external members, 2- sensor fibres, 3- connection straight panels, 4- tail optical fibers, 5- pipelines, 6- single-mode fibers.
Embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " on ", " under ",
The orientation or position relationship of the instruction such as "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer " are
Based on orientation shown in the drawings or position relationship, it is for only for ease of the description present invention and simplifies description, rather than instruction or dark
Show that the device of meaning or element there must be specific orientation, with specific azimuth configuration and operation, thus it is it is not intended that right
The limitation of the present invention.In addition, term " first ", " second " etc. are only used for describing purpose, and it is not intended that instruction or hint phase
To importance or the implicit quantity for indicating indicated technical characteristic.Thus, the feature for defining " first ", " second " etc. can
To express or implicitly include one or more this feature.In the description of the invention, unless otherwise indicated, " multiple "
It is meant that two or more.
In the description of the invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can
To be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, above-mentioned term can be understood by concrete condition
Concrete meaning in the present invention.
Describe the present invention in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
As shown in figure 1, a kind of line leakage sensor, including 2 semicircle external members 1, in the semicircle external member 1
Provided with sensor fibre 2, the semicircle both ends of external member 1 are arranged with a connection straight panel 3, described to connect in straight panel 3
Provided with bolt connecting hole, the semicircle both ends of external member 1 are equipped with annular perforations, and the sensor fibre 2 is worn by annular perforations
Go out to leave tail optical fiber 4.The sensor fibre 2 uses single-mode fiber.The tail optical fiber 4 connects distributed optical fiber sensor.
Sensor is divided into the 2 semicircle external members in left and right, and internal fiber optic loop is shielded；2 be sensor fibre, with right side
Sensor fibre connection, be vibration signal pickup part, when pipeline 5 is revealed, vibration signal passes through sensor first
Semicircle external member 1 is transferred to the inside of sensor fibre 2, and sensor fibre 2 uses single-mode fiber, and inside is made up of multiple fibre cores, is passed
The photosensitive fine outside Mach-Zahnder interference system of 2 connection；According to Mach-Zahnder interference principle, the different fibre cores inside sensor fibre 2
Experience vibration signal and have larger difference, produce interference.
It is locked in use, being fixedly connected between the connection straight panel 3 of two semicircle external members 1 by connecting bolt
On pipeline 5, sensor fibre 2 is arranged using pipe penetration method (inside of semicircle external member 1 is previously provided with annular perforations), finally
Tail optical fiber 4 is flowed out, Mach-Zahnder interference system is connected, is connected multiple sensor series by single-mode fiber 6, by Mach once
German system carries out leakage monitoring and positioning.
The present invention announces a kind of novel optical fiber ring sensor, optical fiber is fastened around on pipeline, due to pipe leakage meeting
Vibration and noise are produced, sensor automatic identification vocal print signal, leakage point is positioned.According to pipeline leakage noise profile and
Phase property identifies pipe leakage and determines the position of leakage point.Pass through the leakage numerical computations to aqueduct and oil pipeline
It was found that the comprehensive change rule of pipeline upstream and downstream hydraulic parameters is different from hydraulic parameters caused by valve opening and closing during pipe leakage
Changing rule, the proposition for being found to be leakage recognition methods of this rule provide foundation.
The present invention discloses proposes a kind of novel optical fiber ring leakage monitoring sensor based on Mach-Zahnder interference principle, realizes
The measurement of early warning and leak source positioning is revealed water delivery steel construction pipeline.This new fiber optic loop based on Mach-Zahnder interference principle
Leakage monitoring sensor not only makes that simple, high sensitivity, cost are cheap, and positioning precision is high, anti-interference is good.Experiment shows,
This its effective sensing scope of fiber optic loop vocal print sensor is 0~200m, and the monitoring to water hammer and bubble is also with high
Response sensitivity.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God any modification, equivalent substitution and improvements made etc., should be included in the scope of the protection with principle.
Claims (3)
- A kind of 1. line leakage sensor, it is characterised in that：Including 2 semicircle external members (1), the semicircle external member (1) sensor fibre (2) is provided with, semicircle external member (1) both ends are arranged with a connection straight panel (3), the company Connect and bolt connecting hole is equipped with straight panel (3), semicircle external member (1) both ends are equipped with annular perforations, the sensor fibre (2) passed by annular perforations and leave tail optical fiber (4).
- A kind of 2. line leakage sensor according to claim 1, it is characterised in that：The sensor fibre (2) is adopted Use single-mode fiber.
- A kind of 3. line leakage sensor according to claim 1, it is characterised in that：The tail optical fiber (4) connects horse Conspicuous once moral interference system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610874925.8A CN107883197A (en) | 2016-09-30 | 2016-09-30 | A kind of line leakage sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610874925.8A CN107883197A (en) | 2016-09-30 | 2016-09-30 | A kind of line leakage sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107883197A true CN107883197A (en) | 2018-04-06 |
Family
ID=61769543
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610874925.8A Pending CN107883197A (en) | 2016-09-30 | 2016-09-30 | A kind of line leakage sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107883197A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111623249A (en) * | 2020-05-29 | 2020-09-04 | 承德石油高等专科学校 | Intelligent pipe capable of sensing leakage position and parameters of pipeline |
| CN112697300A (en) * | 2020-12-31 | 2021-04-23 | 湖北工业大学 | Pipeline leakage monitoring test device and method based on distributed optical fiber temperature measurement technology |
| CN113154267A (en) * | 2021-03-10 | 2021-07-23 | 北京航空工程技术研究中心 | Non-invasive pipe wall clamping sensor for pipeline detection |
Citations (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2442284Y (en) * | 2000-09-21 | 2001-08-08 | 昆山光通塑胶有限公司 | Honeycomb optical cable sheath tube |
| CN200961787Y (en) * | 2006-10-31 | 2007-10-17 | 于伟 | Oil delivery pipe detector for preventing oil theft |
| CN101097281A (en) * | 2006-06-30 | 2008-01-02 | 中国石油天然气集团公司 | Optical fiber safety early warning polarization control system |
| CN101216149A (en) * | 2007-12-27 | 2008-07-09 | 电子科技大学 | Optical fiber distributed type monitoring method for long-distance conduit wiring safe monitoring and its device |
| CN101334331A (en) * | 2007-06-27 | 2008-12-31 | 中国石油天然气股份有限公司 | Distributed Optical Fiber Pipeline Safety Early Warning System Based on Phase Interference |
| CN101813238A (en) * | 2010-04-20 | 2010-08-25 | 上海大学 | Sagnac/Mach-Zehnder interferometer profile fiber sensing system and time domain positioning method thereof |
| CN201662859U (en) * | 2010-05-04 | 2010-12-01 | 武巍 | Light-guide fiber monitoring and alarming system for cable fault, stealing and pipeline damage |
| CN201858525U (en) * | 2010-07-14 | 2011-06-08 | 西安金和光学科技有限公司 | Optical fiber type non-intrusive pipeline pressure sensing device |
| CN102168808A (en) * | 2011-01-14 | 2011-08-31 | 中国科学院上海光学精密机械研究所 | Distributed optical fiber vibration sensor |
| AU2012101045A4 (en) * | 2012-07-12 | 2012-08-16 | Sanfreund Corporation | Gas leak prevention device |
| CN102720949A (en) * | 2012-06-11 | 2012-10-10 | 天津大学 | Fiber duct leakage monitoring device and control method thereof |
| CN103016851A (en) * | 2012-12-06 | 2013-04-03 | 同济大学 | Smart pipeline with optical fiber sensing function and manufacturing method for smart pipeline |
| CN203337111U (en) * | 2013-07-25 | 2013-12-11 | 无锡市政设计研究院有限公司 | Hoop type optical fiber grating reinforcement meter |
| CN203404621U (en) * | 2013-05-30 | 2014-01-22 | 王天宝 | Pipeline system with functions of sensing and communication |
| CN204153471U (en) * | 2014-09-09 | 2015-02-11 | 青岛厚科信息工程有限公司 | A kind of combustion gas lateral Leak testtion and emergent treatment system |
| CN104565826A (en) * | 2013-10-29 | 2015-04-29 | 中国石油天然气股份有限公司 | Pipeline optical fiber safety monitoring and early warning method and system |
| CN204573600U (en) * | 2015-01-30 | 2015-08-19 | 武汉工程大学 | Based on the pipeline of nuclear power plant leakage detector of distributed optical fiber temperature measurement |
| CN204756463U (en) * | 2015-07-11 | 2015-11-11 | 裴志刚 | Detect optical fiber detection system that natural gas line leaked |
| CN204831619U (en) * | 2015-08-05 | 2015-12-02 | 国网电力科学研究院武汉南瑞有限责任公司 | Optic fibre lead temperature sensor anchor clamps |
| CN105866508A (en) * | 2016-04-28 | 2016-08-17 | 云南省计量测试技术研究院 | Online current testing clamp for flexible optical fiber |
| CN206504119U (en) * | 2016-09-30 | 2017-09-19 | 天津市誉航润铭科技发展有限公司 | A kind of fiber optic loop leakage monitoring sensor based on Mach-Zahnder interference |
-
2016
- 2016-09-30 CN CN201610874925.8A patent/CN107883197A/en active Pending
Patent Citations (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2442284Y (en) * | 2000-09-21 | 2001-08-08 | 昆山光通塑胶有限公司 | Honeycomb optical cable sheath tube |
| CN101097281A (en) * | 2006-06-30 | 2008-01-02 | 中国石油天然气集团公司 | Optical fiber safety early warning polarization control system |
| CN200961787Y (en) * | 2006-10-31 | 2007-10-17 | 于伟 | Oil delivery pipe detector for preventing oil theft |
| CN101334331A (en) * | 2007-06-27 | 2008-12-31 | 中国石油天然气股份有限公司 | Distributed Optical Fiber Pipeline Safety Early Warning System Based on Phase Interference |
| CN101216149A (en) * | 2007-12-27 | 2008-07-09 | 电子科技大学 | Optical fiber distributed type monitoring method for long-distance conduit wiring safe monitoring and its device |
| CN101813238A (en) * | 2010-04-20 | 2010-08-25 | 上海大学 | Sagnac/Mach-Zehnder interferometer profile fiber sensing system and time domain positioning method thereof |
| CN201662859U (en) * | 2010-05-04 | 2010-12-01 | 武巍 | Light-guide fiber monitoring and alarming system for cable fault, stealing and pipeline damage |
| CN201858525U (en) * | 2010-07-14 | 2011-06-08 | 西安金和光学科技有限公司 | Optical fiber type non-intrusive pipeline pressure sensing device |
| CN102168808A (en) * | 2011-01-14 | 2011-08-31 | 中国科学院上海光学精密机械研究所 | Distributed optical fiber vibration sensor |
| CN102720949A (en) * | 2012-06-11 | 2012-10-10 | 天津大学 | Fiber duct leakage monitoring device and control method thereof |
| AU2012101045A4 (en) * | 2012-07-12 | 2012-08-16 | Sanfreund Corporation | Gas leak prevention device |
| CN103016851A (en) * | 2012-12-06 | 2013-04-03 | 同济大学 | Smart pipeline with optical fiber sensing function and manufacturing method for smart pipeline |
| CN203404621U (en) * | 2013-05-30 | 2014-01-22 | 王天宝 | Pipeline system with functions of sensing and communication |
| CN203337111U (en) * | 2013-07-25 | 2013-12-11 | 无锡市政设计研究院有限公司 | Hoop type optical fiber grating reinforcement meter |
| CN104565826A (en) * | 2013-10-29 | 2015-04-29 | 中国石油天然气股份有限公司 | Pipeline optical fiber safety monitoring and early warning method and system |
| CN204153471U (en) * | 2014-09-09 | 2015-02-11 | 青岛厚科信息工程有限公司 | A kind of combustion gas lateral Leak testtion and emergent treatment system |
| CN204573600U (en) * | 2015-01-30 | 2015-08-19 | 武汉工程大学 | Based on the pipeline of nuclear power plant leakage detector of distributed optical fiber temperature measurement |
| CN204756463U (en) * | 2015-07-11 | 2015-11-11 | 裴志刚 | Detect optical fiber detection system that natural gas line leaked |
| CN204831619U (en) * | 2015-08-05 | 2015-12-02 | 国网电力科学研究院武汉南瑞有限责任公司 | Optic fibre lead temperature sensor anchor clamps |
| CN105866508A (en) * | 2016-04-28 | 2016-08-17 | 云南省计量测试技术研究院 | Online current testing clamp for flexible optical fiber |
| CN206504119U (en) * | 2016-09-30 | 2017-09-19 | 天津市誉航润铭科技发展有限公司 | A kind of fiber optic loop leakage monitoring sensor based on Mach-Zahnder interference |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111623249A (en) * | 2020-05-29 | 2020-09-04 | 承德石油高等专科学校 | Intelligent pipe capable of sensing leakage position and parameters of pipeline |
| CN111623249B (en) * | 2020-05-29 | 2022-02-01 | 承德石油高等专科学校 | Intelligent pipe capable of sensing leakage position and parameters of pipeline |
| CN112697300A (en) * | 2020-12-31 | 2021-04-23 | 湖北工业大学 | Pipeline leakage monitoring test device and method based on distributed optical fiber temperature measurement technology |
| CN113154267A (en) * | 2021-03-10 | 2021-07-23 | 北京航空工程技术研究中心 | Non-invasive pipe wall clamping sensor for pipeline detection |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104613885A (en) | Tunnel pipeline monitoring and early warning system | |
| CN107883197A (en) | A kind of line leakage sensor | |
| CN102011940B (en) | Distributed optical fiber and flow pressure value-based pipeline leakage joint detection method | |
| CN205919126U (en) | Novel oil pipe leaks pressure detecting system | |
| CN105509979A (en) | Fiber optic negative pressure wave-based oil and gas pipeline leakage monitoring positioning system and method | |
| CN105864642A (en) | Novel pipeline leakage detecting device and method | |
| CN105258670A (en) | Interior settlement monitoring pipe for dam | |
| CN202836679U (en) | Optical fiber probe and liquid interface detection device provided with the same | |
| CN107084313A (en) | Ore slurry pipeline leaks positioning alarm system and method | |
| CN206504119U (en) | A kind of fiber optic loop leakage monitoring sensor based on Mach-Zahnder interference | |
| CN105022131A (en) | Sensing optical cable for monitoring leakage of long-distance tunnel/pipeline | |
| CN101334331B (en) | Distributed Optical Fiber Pipeline Safety Early Warning System Based on Phase Interference | |
| CN111089646A (en) | Method for detecting position of pipeline external water entering buried pipeline or hidden culvert by using distributed optical fiber | |
| CN104456091B (en) | Fiber-optic interferometer CO2 pipe leak detection device based on 3*3 couplers | |
| CN209705740U (en) | A kind of oil field pipeline road leakage monitoring system | |
| CN205280311U (en) | Oil gas pipeline leak detection positioning system based on optic fibre rarefaction wave | |
| CN112697300A (en) | Pipeline leakage monitoring test device and method based on distributed optical fiber temperature measurement technology | |
| CN108869894B (en) | Intelligent gas pipeline | |
| CN208381770U (en) | Distribution type fiber-optic many reference amounts leakage alarm system for pipeline | |
| CN108731743B (en) | Drainage pipeline on-line monitoring system and method based on OFDR distributed optical fibers | |
| CN205066745U (en) | See settlement monitoring pipe in dam | |
| CN109611693A (en) | A kind of gas drainage vacuum lines leak detecting device and method | |
| CN109296945A (en) | A kind of natural gas line leak detection method | |
| CN207394380U (en) | A kind of pipeline two-dimension vibration monitoring sensor based on the orthogonal sensitive structure of optical fiber | |
| CN109424859A (en) | A kind of Novel optical cable sensor-based system for pipeline leak detection |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180406 |
|
| RJ01 | Rejection of invention patent application after publication |