CN106428120A - Distributed type optical fiber-based real-time monitoring system and method for early warning of arriving of train for operating personnel - Google Patents
Distributed type optical fiber-based real-time monitoring system and method for early warning of arriving of train for operating personnel Download PDFInfo
- Publication number
- CN106428120A CN106428120A CN201610926102.5A CN201610926102A CN106428120A CN 106428120 A CN106428120 A CN 106428120A CN 201610926102 A CN201610926102 A CN 201610926102A CN 106428120 A CN106428120 A CN 106428120A
- Authority
- CN
- China
- Prior art keywords
- train
- early warning
- information
- operating personnel
- data center
- 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.)
- Withdrawn
Links
- 238000012544 monitoring process Methods 0.000 title claims abstract description 36
- 239000013307 optical fiber Substances 0.000 title claims abstract description 11
- 238000000034 method Methods 0.000 title claims description 16
- 238000001514 detection method Methods 0.000 claims abstract description 23
- 230000003287 optical effect Effects 0.000 claims abstract description 12
- 238000004891 communication Methods 0.000 claims description 27
- 238000003909 pattern recognition Methods 0.000 claims description 6
- 239000000523 sample Substances 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims 1
- 238000012546 transfer Methods 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 3
- 239000000835 fiber Substances 0.000 abstract description 2
- 230000007547 defect Effects 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 210000001367 artery Anatomy 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 229940085805 fiberall Drugs 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L23/00—Control, warning, or like safety means along the route or between vehicles or vehicle trains
- B61L23/06—Control, warning, or like safety means along the route or between vehicles or vehicle trains for warning men working on the route
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L1/00—Devices along the route controlled by interaction with the vehicle or vehicle train, e.g. pedals
- B61L1/18—Railway track circuits
- B61L1/181—Details
Abstract
The invention discloses a distributed type optical fiber-based real-time monitoring technology for early warning of arriving of a train for an operating personnel. The technology is based on a distributed type optical fiber detection system, and the detection system gives the state information, such as location, speed and running direction, of the train running on a roadway. A monitoring platform data center achieves the positioning of the operating personnel through the GPS information sent by a portable wireless terminal; the monitoring platform data center is allowed to conduct logic division on early warning information in accordance with allowable speeds on the roadway and relevant provisions in early warning distance, transfer the early warning information to the operating personnel, conduct normalized operation according to the prompts of the handheld terminal and transfer the relevant information to a management terminal of a dispatch monitoring center. In this way, no additional fiber optical cable is needed, positioning accuracy is high, monitoring distance is long, real-time monitoring of running condition of the train is convenient to conduct by the operating personnel, and safety of the operating personnel working on the roadway can be guaranteed at the same time.
Description
Technical field
The present invention relates to railway security technical field, the especially early warning of railroad personnel's Train Approaching, particularly one kind are based on
Distribution type fiber-optic personnel train near real-time early warning system and method.
Background technology
Railway is the important infrastructure of country, national economy large artery trunks and the popular vehicles.In the face of so huge
How big rail diatom, ensure that the safety of railway has become the problem that railway interests pays close attention to the most.Wherein, on work business personnel
Road operation is used as an important basic work for ensureing railway security, but props up due to lacking technological means for a long time
Hold, during upper track operating personnel goes out operation, management personnel are difficult to grasp operating personnel's whereabouts at any time, be unfavorable for ensureing train
Traffic safety and the inherently safe of upper track operating personnel；On the other hand, also cause to be difficult to effectively mistake for upper track operation
Journey supervision and dynamic dispatching.For this purpose, in the urgent need to strengthening the management to upper track operation by information-based means, improving management effect
Rate, reduces Along Railway potential safety hazard.
In the current railway system, control centre relies primarily on artificial prompting to the management of upper track operating personnel, when in work
When having the train of current operating area to pass through during industry, operating area is reminded by broadcast or the transmitter receiver mode of propagandaing directed to communicate by control centre
Personnel avoid vehicle, and the artificial alarm mode of this dependence has many defects：One is a lack of carrying out essence to on-site personnel
True job position information gathering, easily occurs misrepresenting deliberately, failing to report phenomenon；Two is that early warning information instruction mode of communication excessively relies on language
Sound, there is a possibility that to listen by mistake；Three be convey to on-site personnel early warning information directivity indefinite, to operating personnel people
Body is constituted a threat to safely.
Distributed fiberoptic sensor has anti-electromagnetic interference capability by force, Noninvasive, high sensitivity, it is not necessary to which scene supplies
Electricity, achievable distributed measurement, corrosion-resistant, explosion-proof, light path has flexibility, the advantage such as is easy to be connected with fibre system.In recent years
Come, be widely used in natural gas, petroleum pipeline safety monitoring, bridge crack is monitored, gas concentration detection, border security protection etc. are led
Domain.
Content of the invention
For above-mentioned situation, the purpose for overcoming the defect of prior art, the present invention is just to provide one kind based on distributed
The management operating personnel of fiber-optic probe with train near prior-warning device, can effectively solving railway upper track operating personnel safety pre-
Alert, reduce the problem of vehicle accident.
The technical scheme is that, based on distribution type fiber-optic personnel train near early warning real-time monitoring system, including dividing
Cloth fiber-optic probe system, monitoring platform data center, management terminal, road junction terminal, existing railway communications optical cable, multiple are warned
Road junction terminal is installed at road junction；
Described distribution type fiber-optic detection system includes that Rayleigh or the distributed optical fiber vibration of Brillouin scattering are passed with strain
Sensor, detecting instrument, pattern recognition unit, distributed optical fiber vibration is laid along whole rail length with strain transducer, institute
Have the position of train and the strain in traveling process, vibration signal by distributed optical fiber vibration in distribution type fiber-optic detection system with
Rayleigh or brillouin scattering signal in strain transducer is given, and through pattern recognition unit signal processing, obtains optical fiber
All train lengths, train position on the rail of detection system covering, real time running speed, train up-downlink direction information,
Obtain certain space or time interval by by the train relative position information at certain road junction, reletive arriving time, real-time row
Sail speed, be close to road junction train length, train up-downlink direction information；Communications equipment room connection along railway laying described in both
There is railway communication optical cable, monitor in real time is carried out to the Train Approaching state by alert road junction described in Along Railway distribution and is prevented
Shield；Described distribution type fiber-optic detection system is by the described monitoring platform data center of communication link connection；Monitoring platform number
The positioning of operating personnel is realized according to the GPS information for sending back centrally through portable radio terminal；Monitoring platform data center will
Early warning information is close to distance according to circuit permissible velocity and pertinent regulations early warning, carries out logic distinguishing, and passes to operating personnel,
Standardized work is pointed out according to handheld terminal, and relevant information is passed to the management terminal of dispatch center.
Based on distribution type fiber-optic personnel train near early warning method for real-time monitoring, method is based on distribution type fiber-optic detection system
System, monitoring platform data center, wireless terminal, existing railway communications optical cable；
Described personnel's train, near early warning method for real-time monitoring and device, is given by distribution type fiber-optic detection system
The status information of running train on circuit, including position, speed, up-downlink direction etc.；Monitoring platform data center is by portable
The GPS information that formula wireless terminal sends back realizes the positioning of operating personnel；Monitoring platform data center is by early warning information according to line
Road permissible velocity and pertinent regulations early warning are close to distance, carry out logic distinguishing, and pass to operating personnel, carry according to handheld terminal
Show standardized work, and relevant information is passed to the management terminal of dispatch center.
Described distribution type fiber-optic detection system includes the positioning to train, be based on Rayleigh (or Brillouin) scatter point
Cloth fiber-optic vibration (strain) sensor, lays along whole rail length, Rayleigh (or Brillouin) scattered signal, can detect
Strain, vibration signal in all distribution type fiber-optic detection systems i.e. in all train traveling process, and know through pattern
Deng can not remove noise jamming, identify train signal after signal processing.And by further algorithm process, obtain
All train lengths, train position, real time running speed, train up-downlink direction on the rail of fiber-optic probe system covering etc.
Information, can obtain (select certain space or time interval) by the train relative position information at neighbouring road junction, relative arrive
Reach time, real time running speed, be close to the information such as road junction train length, train up-downlink direction.Distribution type fiber-optic detection system
These information are carried out after comprehensive analysis processing, the judgement of integrity is formed, early warning information is formed, and these early warning information are led to
Communication links are crossed to described monitor supervision platform data center, data center is sent to monitoring information described in different rights
User terminal；
Described distribution type fiber-optic detection system, disposes in communications equipment room along the railway, is linked into railway existing
Communications optical cable, and be connected with the communication link inside railway, distribution type fiber-optic detection system is using in existing communications optical cable
One core is detected.
Described communication link is railway private network, can ensure safety, the reliability of information transfer.
Described monitoring platform data center includes server, center monitors display device etc.；Can be by distribution type fiber-optic
The information that Detection location instrument is uploaded carries out logic manage, and the authority according to each terminal, sends out to road junction terminal and monitor terminal
Send corresponding early warning information.
Beneficial effects of the present invention：1st, the present invention is based on distribution type fiber-optic personnel train near real-time early warning system and side
Method, using Distributed Optical Fiber Sensing Techniques, by pattern recognition, can be with real-time monitoring train relative position information, relative arrival
The information such as time, real time running speed, train up-downlink direction.
2nd, existing railway communications optical cable is adopted, optical cable need not be laid again substantially, reduce construction cost.
3rd, train position and speed orientation sensing unit live need not be powered, reliability height.
4th, communication link is railway private network, can to ensure safety, the reliability of information transfer.
Description of the drawings
Fig. 1 is based on distribution type fiber-optic personnel's train near real-time early warning system structured flowchart for the present invention；
Specific embodiment
Below in conjunction with the accompanying drawings presently preferred embodiments of the present invention is described in detail, so that advantages and features of the invention energy
It is easier to be readily appreciated by one skilled in the art, apparent clearly defines so as to make to protection scope of the present invention.
Fig. 1, Fig. 1 refer to first for the present invention based on distribution type fiber-optic personnel's train near real-time early warning system structural frames
Figure.As seen from Figure 1, the present invention is based on distribution type fiber-optic personnel train near real-time early warning system and method, and constituting includes distribution
Formula fiber-optic probe instrument, monitoring platform data center, portable radio terminal, existing railway communications optical cable；Described distributed light
Fine Detection location instrument, in the existing railway communications optical cable described in communications equipment room connection laying along the line, enters to Train Approaching state
Row monitor in real time and protection；Described distribution type fiber-optic Detection location instrument passes through the signal to detecting carries out pattern recognition etc.
After reason, noise jamming can be removed, will to train relative position information, reletive arriving time, real time running speed, be close to road junction
The information such as train length, train up-downlink direction carry out real-time monitoring, and report described monitoring platform by communication link
Data center；Described monitoring platform data center by early warning information according to circuit permissible velocity and pertinent regulations early warning be close to away from
From carrying out logic distinguishing, and the authority according to each terminal, be accurately transferred to described portable mobile wireless by communication link
Terminal, operating personnel shows according to described terminal and prompting is standardized operation, while relevant information passes to station section tune
Spend Surveillance center and pass to the described monitor terminal of upper level Surveillance center as requested.
Portable radio terminal used, the GSM/GPS portable radio terminal for being produced by Shanghai Yi Ke company is concrete
Parameter is as follows：
Embodiments of the invention are the foregoing is only, the scope of the claims of the present invention is not thereby limited, every using this
Equivalent structure or equivalent flow conversion that bright description and accompanying drawing content are made, or directly or indirectly it is used in other related skills
Art field, is included within the scope of the present invention.
Claims (6)
1., based on distribution type fiber-optic personnel train near early warning real-time monitoring system, it is characterized in that including distribution type fiber-optic detection system
System, monitoring platform data center, management terminal, road junction terminal, existing railway communications optical cable, multiple by alert road junction installation road junction end
End；Described distribution type fiber-optic detection system include the distributed optical fiber vibration of Rayleigh or Brillouin scattering and strain transducer,
Detecting instrument, pattern recognition unit, distributed optical fiber vibration is laid along whole rail length with strain transducer, all trains
Position and traveling process in strain, vibration signal by distributed optical fiber vibration in distribution type fiber-optic detection system and strain pass
Rayleigh or brillouin scattering signal in sensor is given, and through pattern recognition unit signal processing, obtains fiber-optic probe system
All train lengths, train position on the rail of system covering, real time running speed, train up-downlink direction information, that is, obtain
Certain space or time interval by by the train relative position information at certain road junction, reletive arriving time, real time running speed,
It is close to road junction train length, train up-downlink direction information；In communications equipment room connection along the existing railway described in railway laying
Communications optical cable, carries out monitor in real time and protection to the Train Approaching state by alert road junction described in Along Railway distribution；Described
Distribution type fiber-optic detection system by the described monitoring platform data center of communication link connection；Monitoring platform data center leads to
Cross the positioning that the GPS information that portable radio terminal sends back realizes operating personnel；Monitoring platform data center is by early warning information
Distance is close to according to circuit permissible velocity and pertinent regulations early warning, logic distinguishing is carried out, and operating personnel is passed to, according to hand-held
Terminal notifying standardized work, and relevant information is passed to the management terminal of dispatch center.
2. real-time monitoring system according to claim 1, it is characterised in that distribution type fiber-optic detection system utilizes Communication ray
A core in cable is detected along railway laying.
3. real-time monitoring system according to claim 1, it is characterised in that described communication link be.
4. according to claim 1 supervised near early warning real-time monitoring system in real time based on distribution type fiber-optic personnel train
The method of control, is characterized in that providing the status information of running train on circuit by distribution type fiber-optic detection system, including position,
Speed, up-downlink direction etc.；Monitoring platform data center realizes operation people by the GPS information that portable radio terminal sends back
The positioning of member；Early warning information is close to distance according to circuit permissible velocity and pertinent regulations early warning by monitoring platform data center, is entered
Row logic distinguishing, and operating personnel is passed to, standardized work is pointed out according to handheld terminal, and relevant information is passed to scheduling
The management terminal of Surveillance center.
5. method according to claim 4, it is characterised in that monitoring platform data center is by the hand-held nothing of management personnel
The GPS position information that line data terminal sends（Or BEI-DOU position system）The train running information for sending with fiber-optical probe, meter
The position relationship of personnel and train is calculated, and early warning information is sent in risk distance.
6. method according to claim 4, it is characterised in that the communication module for being adopted be
Wireless communication module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610926102.5A CN106428120A (en) | 2016-10-24 | 2016-10-24 | Distributed type optical fiber-based real-time monitoring system and method for early warning of arriving of train for operating personnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610926102.5A CN106428120A (en) | 2016-10-24 | 2016-10-24 | Distributed type optical fiber-based real-time monitoring system and method for early warning of arriving of train for operating personnel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106428120A true CN106428120A (en) | 2017-02-22 |
Family
ID=58176243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610926102.5A Withdrawn CN106428120A (en) | 2016-10-24 | 2016-10-24 | Distributed type optical fiber-based real-time monitoring system and method for early warning of arriving of train for operating personnel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106428120A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111458059A (en) * | 2019-01-21 | 2020-07-28 | 中国科学院上海光学精密机械研究所 | Continuous vehicle collision detection system and method thereof |
| CN111854919A (en) * | 2020-07-16 | 2020-10-30 | 南京大学 | Railway health monitoring method based on distributed optical fiber vibration sensing system |
| CN114084198A (en) * | 2021-10-14 | 2022-02-25 | 山东大学 | Train state identification and warning system and method based on distributed sound wave sensing |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201224417Y (en) * | 2008-06-20 | 2009-04-22 | 北京交通大学 | Distribution type stress sensing train locating and real time trace system based on Raman amplification |
| WO2012152575A1 (en) * | 2011-05-06 | 2012-11-15 | Siemens Aktiengesellschaft | A method for railway monitoring based on fiber optics |
| CN104960549A (en) * | 2015-06-25 | 2015-10-07 | 北京交通大学 | Protective unattended system capable of sensing railway field operation on the basis of thin-core optical fiber |
| CN104960552A (en) * | 2015-06-25 | 2015-10-07 | 北京交通大学 | Unmanned watching system for railway on-site operation protection based on coreless optical fiber sensing |
| CN105128892A (en) * | 2015-09-07 | 2015-12-09 | 上海劲易电子科技有限公司 | Safety guaranteeing system for railway operator |
-
2016
- 2016-10-24 CN CN201610926102.5A patent/CN106428120A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201224417Y (en) * | 2008-06-20 | 2009-04-22 | 北京交通大学 | Distribution type stress sensing train locating and real time trace system based on Raman amplification |
| WO2012152575A1 (en) * | 2011-05-06 | 2012-11-15 | Siemens Aktiengesellschaft | A method for railway monitoring based on fiber optics |
| CN104960549A (en) * | 2015-06-25 | 2015-10-07 | 北京交通大学 | Protective unattended system capable of sensing railway field operation on the basis of thin-core optical fiber |
| CN104960552A (en) * | 2015-06-25 | 2015-10-07 | 北京交通大学 | Unmanned watching system for railway on-site operation protection based on coreless optical fiber sensing |
| CN105128892A (en) * | 2015-09-07 | 2015-12-09 | 上海劲易电子科技有限公司 | Safety guaranteeing system for railway operator |
Non-Patent Citations (1)
| Title |
|---|
| 阚建平: "铁路道口列车接近安全预警系统", 《铁道通信信号》, vol. 52, no. 8, pages 55 - 56 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111458059A (en) * | 2019-01-21 | 2020-07-28 | 中国科学院上海光学精密机械研究所 | Continuous vehicle collision detection system and method thereof |
| CN111458059B (en) * | 2019-01-21 | 2022-01-28 | 中国科学院上海光学精密机械研究所 | Continuous vehicle collision detection system and method thereof |
| CN111854919A (en) * | 2020-07-16 | 2020-10-30 | 南京大学 | Railway health monitoring method based on distributed optical fiber vibration sensing system |
| CN114084198A (en) * | 2021-10-14 | 2022-02-25 | 山东大学 | Train state identification and warning system and method based on distributed sound wave sensing |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106394612A (en) | Crossing train approaching real-time pre-warning system and method based on distributed optical fibers | |
| CN205445677U (en) | Tunnel safety precaution and automatic control system of measurationing | |
| CN204415435U (en) | Based on the high ferro line boundary invasion on-line monitoring system of distributed optical fiber sensing | |
| CN105128892A (en) | Safety guaranteeing system for railway operator | |
| CN107861134A (en) | Based on the Big Dipper, distribution type fiber-optic and the steel tower of radar detection real-time monitoring system | |
| CN106347416A (en) | Distributed optical fiber-based train compartment separation real-time early warning system and method | |
| CN106428120A (en) | Distributed type optical fiber-based real-time monitoring system and method for early warning of arriving of train for operating personnel | |
| CN108732614B (en) | A kind of online railway monitoring system and method based on distributed acoustic sensor | |
| CN108717785A (en) | A kind of wisdom traffic safety management system | |
| CN105303777A (en) | Tunnel lining structure spalling and collapsing real-time monitoring and alarming system | |
| CN106184235A (en) | A kind of rail vehicle system | |
| CN202294879U (en) | Train operation early warning system | |
| CN109872505A (en) | A kind of freeway guardrail alarm system and method based on optical fiber micro-vibration | |
| CN206255023U (en) | Based on distribution type fiber-optic road junction Train Approaching real-time early warning system | |
| CN104960548A (en) | Operation protective method and system based on comparison between track occupation and operation position | |
| CN104374466B (en) | Optical fiber vibration real-time monitoring and alarming system for roadbed collapse | |
| CN212556288U (en) | Railway broken rail monitoring device | |
| CN106274993B (en) | A kind of electric rail vehicle environment automatic recognition system based on wireless radio-frequency | |
| CN207396743U (en) | Based on the Big Dipper, distribution type fiber-optic and the steel tower of radar detection real-time monitoring system | |
| RU89055U1 (en) | REMOTE CONTROL SYSTEM OF THE RAILWAY STATE | |
| CN105835911B (en) | operation management system and operation management method | |
| CN206258083U (en) | Active network deformation implementing monitoring system based on distributed stress measurement | |
| CN114084198A (en) | Train state identification and warning system and method based on distributed sound wave sensing | |
| CN204368188U (en) | Infrared detector railway crossing warning device | |
| JP2018114792A (en) | Railway control system using optical cable |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| CB03 | Change of inventor or designer information |
Inventor after: Zhang Jie Inventor after: Wang Zhaoyong Inventor after: Ye Qing Inventor after: Cai Haiwen Inventor after: Zheng Hanrong Inventor after: Song Guoliang Inventor after: Zhao Yue Inventor after: Yang Maozhou Inventor after: Cao Yulong Inventor after: Wu Haijun Inventor after: Jiang Xiaobing Inventor after: Xia Baoqian Inventor after: Lu Bin Inventor before: Cao Yulong Inventor before: Wu Haijun Inventor before: Jiang Xiaobing Inventor before: Xia Baoqian Inventor before: Lu Bin Inventor before: Wang Zhaoyong Inventor before: Ye Qing Inventor before: Cai Haiwen Inventor before: Zheng Hanrong |
|
| CB03 | Change of inventor or designer information | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20171211 Address after: No. 80 Tianmu East Road, Jingan District, Shanghai Applicant after: SHANGHAI RAILWAY BUREAU Applicant after: NANJING PI-LIGHTWAVE INFORMATION TECHNOLOGY CO.,LTD. Address before: Shuanglong street in Qinhuai District of Nanjing City, Jiangsu province 210007 No. 1 Ssangyong science and Technology Industrial Park 2 Building 3 floor Applicant before: NANJING PI-LIGHTWAVE INFORMATION TECHNOLOGY CO.,LTD. |
|
| TA01 | Transfer of patent application right | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20170222 |
|
| WW01 | Invention patent application withdrawn after publication |