CN108198404A - A kind of geotechnical engineering safety monitoring system based on wireless sensor network technology - Google Patents
A kind of geotechnical engineering safety monitoring system based on wireless sensor network technology Download PDFInfo
- Publication number
- CN108198404A CN108198404A CN201810176268.9A CN201810176268A CN108198404A CN 108198404 A CN108198404 A CN 108198404A CN 201810176268 A CN201810176268 A CN 201810176268A CN 108198404 A CN108198404 A CN 108198404A
- Authority
- CN
- China
- Prior art keywords
- node
- base station
- sensor
- safety monitoring
- working node
- 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- Withdrawn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
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
- H04W40/04—Communication route or path selection, e.g. power-based or shortest path routing based on wireless node resources
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/24—Connectivity information management, e.g. connectivity discovery or connectivity update
- H04W40/32—Connectivity information management, e.g. connectivity discovery or connectivity update for defining a routing cluster membership
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Computing Systems (AREA)
- General Health & Medical Sciences (AREA)
- Medical Informatics (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Alarm Systems (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The present invention provides a kind of geotechnical engineering safety monitoring systems based on wireless sensor network technology, including grating sensing monitoring device, communication network and data processing centre, grating sensing monitoring device is connected by communication network with data processing centre, the grating sensing monitoring device includes base station and multiple sensor nodes, each sensor node, which is mounted in ground monitoring region, to be responsible for obtaining ground safety monitoring data, each sensor node has unique ID number, and the two-way information interaction between sensor node and data processing centre is responsible in the base station.The present invention realizes Geotechnical Monitoring using wireless sensor network technology.
Description
Technical field
The present invention relates to geotechnical structure monitoring technical fields, and in particular to a kind of rock based on wireless sensor network technology
Geotechnological journey safety monitoring system.
Background technology
At present, Geotechnical Monitoring is mainly to railway, highway and water by Instrument observation and walkaround inspection mode
The situations such as sharp hydroelectric project agent structure, two sides side slope, foundation, land movement and sedimentation make assessment, judge engineering
Security situation provides administration base for supervisor or makes danger early warning, to prevent the generation of disaster accident.Existing prison
Main problem existing for survey method is：1st, sensor Embedded installation work progress is complicated, and sensor signal cable dosage is more, cable
Lay it is great in constructing amount, it is time-consuming；2nd, burying a large amount of cables causes site construction management difficult, inbuilt a large amount of in concrete
Cable can also reduce structural strength, bring security risk, once cable is damaged in construction will cause safety monitoring device
It can not work normally；3rd, after sensor Embedded installation, signal cable is led into data acquisition equipment, data acquisition equipment is responsible for
Digital signal is converted analog signals into, data acquisition equipment connect acquisition data with computer and analyzed, unattended
In the case of, it will usually technical staff's carrying data transmission and storage device is periodically sent to go to joint connection in site data acquisition equipment
Data are obtained, therefore level is more, data are delayed using lag, response speed in the acquisition of data and the transmission of use aspects presence signal
The defects of slow.
Invention content
In view of the above-mentioned problems, the present invention provides a kind of Geotechnical Monitoring system based on wireless sensor network technology
System.
The purpose of the present invention is realized using following technical scheme：
A kind of geotechnical engineering safety monitoring system based on wireless sensor network technology is provided, is filled including sensor monitoring
It puts, communication network and data processing centre, grating sensing monitoring device is connected by communication network with data processing centre, described
Grating sensing monitoring device includes base station and multiple sensor nodes, and each sensor node, which is mounted in ground monitoring region, is responsible for acquisition
Ground safety monitoring data, each sensor node have unique ID number, and sensor node and data processing are responsible in the base station
Two-way information interaction between center.
Data processing centre is used to that the ground safety monitoring data that base station is sent to be analyzed and processed and shown, and in rock
It alarms during native safety monitoring data exception.Preferably, the data processing centre includes data processor and display, should
The ground safety monitoring data received are compared by data processor with the secure threshold of corresponding setting, export comparison result,
And result is compared by display and is shown.
Beneficial effects of the present invention are：Realize geotechnical engineering safety ground safety monitoring data instantaneous acquiring, immediately
Collect and immediately using function, solve the problems, such as that spot sensor Embedded installation and signal cable laying are brought, have automatic
Networking, reliability is high, monitors the features such as accurate, convenient for installation and maintenance, operating cost is cheap.
Description of the drawings
Using attached drawing, the invention will be further described, but the embodiment in attached drawing does not form any limit to the present invention
System, for those of ordinary skill in the art, without creative efforts, can also obtain according to the following drawings
Other attached drawings.
Fig. 1 is the structural schematic block diagram of the geotechnical engineering safety monitoring system of one embodiment of the invention；
Fig. 2 is the block diagram representation of the data processing centre of one embodiment of the invention.
Reference numeral：
Grating sensing monitoring device 1, communication network 2, data processing centre 3, alarm 4, data processor 10, display 20.
Specific embodiment
The invention will be further described with the following Examples.
Referring to Fig. 1, a kind of Geotechnical Monitoring system based on wireless sensor network technology provided in this embodiment
System, including grating sensing monitoring device 1, communication network 2 and data processing centre 3, grating sensing monitoring device 1 passes through communication network 2 and number
It is connected according to processing center 3, the grating sensing monitoring device 1 includes base station and multiple sensor nodes, each sensor node peace
It is responsible for obtaining ground safety monitoring data in ground monitoring region, each sensor node has unique ID number, the base
It stands and is responsible for two-way information interaction between sensor node and data processing centre.
Wherein, communication network 2 is satellite communication network, Ethernet, fieldbus networks or radio station.
Sensor node includes sensor, signal conditioning circuit, microprocessor, memory, wireless radiofrequency module and power supply
Module, power module are microprocessor power supply, and sensor is connected to the input terminal of signal conditioning circuit, signal conditioning circuit it is defeated
Outlet is connected with the I/O interfaces of microprocessor, which also passes through I/O interfaces and wireless radiofrequency module and memory phase
Connection.
Wherein, data processing centre 3 is used to that the ground safety monitoring data that base station is sent to be analyzed and processed and shown,
And it alarms in ground safety monitoring data exception.As a kind of optional mode, as shown in Fig. 2, data processing centre 3
Including data processor 10 and display 20, the data processor 10 by the ground safety monitoring data received and it is corresponding setting
Secure threshold is compared, and exports comparison result, and be compared result by display 20 and show.Display 20 is additionally operable in real time
Ground safety monitoring data are shown, so as to the status information for monitoring personnel's real time inspection geotechnical structure.
Wherein, the ground safety monitoring data include the land movement data of ground.
Optionally, geotechnical engineering safety monitoring system further includes the alarm 4 being connect with data processor 10, when ground is pacified
When full monitoring data are beyond the secure threshold of corresponding setting, the data processor 10 drives alarm 4 to alarm.
Wherein, the alarm 4 includes buzzer siren or audible-visual annunciator, and the present embodiment is not construed as limiting this.
The above embodiment of the present invention realizes the instantaneous acquiring of geotechnical engineering safety ground safety monitoring data, collects immediately
With immediately using function, solve the problems, such as that spot sensor Embedded installation and signal cable laying bring, have automatic network-building,
The features such as reliability is high, monitoring is accurate, convenient for installation and maintenance, operating cost is cheap.
As a kind of optional mode, each sensor node builds the wireless sensor network of sub-clustering by clustering route protocol
Network, wherein each cluster includes first cluster head and second cluster head, the first cluster head is adopted for polymerizeing cluster inner sensor node
The ground safety monitoring data of collection, the ground safety monitoring data of polymerization that the second cluster head sends for the first cluster head of reception, and
The ground safety monitoring data of the polymerization of reception are sent to base station by way of multihop routing；Wherein, the sub-clustering road
Included by agreement：
(1) after each sensor node receives the beacon message of base station broadcast, itself is determined to the distance of base station, and record receipts
To the actual signal intensity of the beacon message, the beacon message includes receiving beacon letter by each sensor node of base station sets
The theory signal intensity of breath；
(2) the random generating probability D of sensor nodeiIf probability DiLess than the probability threshold value D of setting, then the sensor node
As working node and it is added immediately working node collection；If probability DiNo more than the probability threshold value D of setting, then the sensor node
As sleeping nodes；Working node determines the current the perception radius of itself, and remaining working node concentrated to working node is wide
Nodal information is broadcast, wherein nodal information includes itself ID number, current the perception radius information；
(3) after working node receives the nodal information of remaining working node, if working node α is located at working node β
Sensing range in, then working node α be added to working node β neighbor node concentrate；
(4) neighbor node of working node is concentrated, the working node of preferred value maximum be elected as the first cluster head and to remaining
Sensor node broadcasts are elected to information, and the working node of not elected first cluster head becomes member node and is added to nearest first
Cluster head；
(5) sleeping nodes are received after information is elected in the broadcast and are activated, and be added to the first nearest cluster head, point
After the completion of cluster, the first cluster head selects a sensor node as the second cluster head in its cluster.
The present embodiment proposes a kind of new clustering route protocol, passes through the first cluster head of selection and the second cluster head in the agreement
To undertake the polymerization of ground safety monitoring data and forwarding task, realization energy consumption dispersion, so as to reduce ground in completion cluster
The energy consumption of first cluster head of safety monitoring data aggregate and the frequency of the first cluster head rotation, and then the existence of network can be extended
Time.The conduct cluster head of current remaining maximum is directly selected relative to the prior art, the present embodiment is creatively chosen excellent
The sensor node of choosing value maximum is as the first cluster head.
Wherein, the calculation formula of preferred value is：
In formula, WjRepresent the preferred value of working node j, ZjFor the current remaining of working node j, Zj0For working node
The primary power of j, CjFor the current the perception radius of working node j, L (j, O) is distances of the working node j to base station；EjFor work
Node j receives the actual signal intensity of base station beacon message,To receive the reason of beacon message by the working node j of base station sets
By signal strength,For the value function of setting, whenWhen,WhenWhen,r1、r2For the weight coefficient of setting, and r1+r2=1.
The present embodiment creatively devises the calculation formula of preferred value, and the reality of base station information is received according to sensor node
The difference of border signal strength and theory signal intensity devises the weighting coefficient for distance so that the preferred value calculated is more smart
The position advantage of true weighbridge quantity sensor node, the present embodiment is according to energy and position advantage two because usually selecting the first cluster
Head enables to the first cluster head to reduce rock under the premise of having enough energy to complete the task of ground safety monitoring data aggregate
The energy consumption of native safety monitoring data forwarding, so as to reduce the rate of the first cluster head failure.
As a kind of optional mode, the first cluster head selects a sensor node as the second cluster head, packet in its cluster
It includes：
(1) first cluster head calculates the select probability of each sensor node in its cluster；
(2) first cluster heads are using the sensor node of select probability maximum in its cluster as the second cluster head；
Wherein, the calculation formula of the select probability is：
In formula, HxRepresent the select probability of sensor node x, ZxFor the current remaining of sensor node x, ZminTo set
Fixed minimum energy value, ZqThe current remaining of the first cluster head q for the affiliated clusters of sensor node x, L (x, q) are sensor
The distance of node x to its first cluster head q, L (q, O) are distances of the first cluster head q to base station, and L (x, O) is arrived for sensor node x
The distance of base station, y [L (q, O), L (x, O)] is judges value function, as L (q, O) >=L (x, O), y [L (q, O), L (x, O)]
=1, as L (q, O) ＜ L (x, O), y [L (q, O), L (x, O)]=g, g is the energy consumption weight factor of setting.
As a kind of optional mode, when the current remaining of the second cluster head is less than the minimum energy value Z setmi0When,
Second cluster head redefines a sensor node as the second cluster head in its cluster.
The present embodiment creatively devises the calculating of select probability according to the energy and positional factor of sensor node
Formula, select probability is bigger to represent sensor node with more preferably position and enough energy are responsible for ground safety monitoring number
According to the task of forwarding.Second cluster head is to relay energy consumption between the cluster of the first cluster head for undertaking, and the present embodiment is general according to above-mentioned selection
The calculation formula of rate calculates the select probability of each sensor node in cluster, and therefrom by the sensor node of select probability maximum
As the second cluster head, be conducive to ensure the reliability of ground safety monitoring data forwarding, reduce the first cluster head and sent out to the second cluster head
The energy consumption of ground safety monitoring data is sent, saves the communications cost of geotechnical engineering safety monitoring system.
As a kind of optional mode, sensor node also records the time for the beacon message for receiving base station broadcast, institute
The beacon message stated further includes the theoretical time that beacon message is received by each sensor node of base station sets；The current perception
The calculation formula of radius is：
In formula, CjFor the current the perception radius of working node j, L (j, O) is working node j to the distance of base station, LmaxFor
All the sensors node is to the maximum value in the distance of base station, LminFor the minimum in the distance of all the sensors node to base station
Value, v are the radius controlling elements of definition, and value is between [0.4,0.8], Cj0Perception during for all the sensors node initializing
Radius；；jThe time of base station beacon message is received for working node j,To receive base station letter by the working node j of base station sets
The theoretical time of information is marked,To judge value function, whenWhen,WhenWhen,
The present embodiment sets the calculation formula of current the perception radius, by controlling current the perception radius, controls each work
Make the neighbor node number of node, so as to further influence the competitive scope of working node.
The present embodiment also creatively according to sensor node receive base station broadcast beacon message time with it is theoretical
The difference of time devises the weighting coefficient for distance, improve the competitive scope of working node according to itself to base station away from
From and change precision.
The control that the present embodiment passes through current the perception radius so that the competitive scope of working node can arrive base according to itself
The distance stood and change, the competitive scope of the working node nearer apart from base station is relatively smaller, is conducive to nearer apart from base station
Region generates more the first cluster head, and cluster scale is relatively small, so as to the balanced energy consumption apart from base station immediate area, prevent away from
From the second cluster head in the immediate area of base station because comparatively fast failing during excessive ground safety monitoring data forwarding task, improve and obtain
The reliability of ground safety monitoring data is taken, the opposite monitoring accuracy for improving geotechnical engineering safety monitoring system.
Finally it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention rather than the present invention is protected
The limitation of range is protected, although being explained in detail with reference to preferred embodiment to the present invention, those of ordinary skill in the art should
Work as understanding, technical scheme of the present invention can be modified or replaced equivalently, without departing from the reality of technical solution of the present invention
Matter and range.
Claims (6)
1. a kind of geotechnical engineering safety monitoring system based on wireless sensor network technology, it is characterized in that, including sensor monitoring
Device, communication network and data processing centre, grating sensing monitoring device is connected by communication network with data processing centre, described
Grating sensing monitoring device include base station and multiple sensor nodes, each sensor node be mounted on ground monitoring region in is responsible for obtaining
Ground safety monitoring data are taken, each sensor node has unique ID number, and the base station is responsible at sensor node and data
Two-way information interaction between reason center.
2. a kind of geotechnical engineering safety monitoring system based on wireless sensor network technology according to claim 1,
It is characterized in, the data processing centre includes data processor and display, which supervises safely the ground received
Measured data is compared with the secure threshold of corresponding setting, exports comparison result, and be compared result by display and show.
3. a kind of geotechnical engineering safety monitoring system based on wireless sensor network technology according to claim 2,
It is characterized in, further includes the alarm being connect with data processor, when ground safety monitoring data are beyond the safety threshold of corresponding setting
During value, the data processor driving alarm is alarmed.
4. a kind of geotechnical engineering safety monitoring system based on wireless sensor network technology according to claim 1,
It is characterized in, sensor node includes sensor, signal conditioning circuit, microprocessor, memory, wireless radiofrequency module and power supply mould
Block, power module are microprocessor power supply, and sensor is connected to the input terminal of signal conditioning circuit, the output of signal conditioning circuit
End is connected with the I/O interfaces of microprocessor, which is also connected by I/O interfaces with wireless radiofrequency module and memory
It connects.
5. according to a kind of Geotechnical Monitoring based on wireless sensor network technology of claim 1-4 any one of them
System, it is characterized in that, each sensor node builds the wireless sensor network of sub-clustering by clustering route protocol, wherein each cluster
Including first cluster head and second cluster head, the ground that the first cluster head is used to polymerize the acquisition of cluster inner sensor node is supervised safely
Measured data, the second cluster head is for receiving the ground safety monitoring data for the polymerization that the first cluster head is sent, and by the polymerization of reception
Ground safety monitoring data are sent to base station by way of multihop routing；Wherein, the clustering route protocol includes：
(1) after each sensor node receives the beacon message of base station broadcast, itself is determined to the distance of base station, and record and receive this
The actual signal intensity of beacon message, the beacon message include receiving beacon message by each sensor node of base station sets
Theory signal intensity；
(2) the random generating probability D of sensor nodeiIf probability DiLess than the probability threshold value D of setting, then the sensor node becomes
Working node is simultaneously added immediately working node collection；If probability DiNo more than the probability threshold value D of setting, then the sensor node becomes
Sleeping nodes；Working node determines the current the perception radius of itself, and remaining working node concentrated to working node broadcasts section
Point information, wherein nodal information include itself ID number, current the perception radius information；
(3) after working node receives the nodal information of remaining working node, if working node α is located at the sense of working node β
In the range of knowing, then working node α is added to the neighbor node concentration of working node β；
(4) neighbor node of working node is concentrated, and the working node of preferred value maximum is elected as the first cluster head and is sensed to remaining
Device node broadcasts are elected to information, and the working node of not elected first cluster head becomes member node and is added to the first nearest cluster
It is first；
(5) sleeping nodes are received after information is elected in the broadcast and are activated, and be added to the first nearest cluster head, and sub-clustering is complete
Cheng Hou, the first cluster head select a sensor node as the second cluster head in its cluster.
6. a kind of geotechnical engineering safety monitoring system based on wireless sensor network technology according to claim 5,
Be characterized in, sensor node also records the time for the beacon message for receiving base station broadcast, the beacon message further include by
Each sensor node of base station sets receives the theoretical time of beacon message；The calculation formula of the current the perception radius is：
In formula, CjFor the current the perception radius of working node j, L (j, O) is working node j to the distance of base station, LmaxFor all biographies
Sensor node is to the maximum value in the distance of base station, LminFor the minimum value in the distance of all the sensors node to base station, v is
The radius controlling elements of definition, value is between [0.4,0.8], Cj0The perception radius during for all the sensors node initializing；
PjThe time of base station beacon message is received for working node j,To receive base station beacon message by the working node j of base station sets
Theoretical time,To judge value function, whenWhen,WhenWhen,
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810176268.9A CN108198404A (en) | 2018-03-03 | 2018-03-03 | A kind of geotechnical engineering safety monitoring system based on wireless sensor network technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810176268.9A CN108198404A (en) | 2018-03-03 | 2018-03-03 | A kind of geotechnical engineering safety monitoring system based on wireless sensor network technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108198404A true CN108198404A (en) | 2018-06-22 |
Family
ID=62594948
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810176268.9A Withdrawn CN108198404A (en) | 2018-03-03 | 2018-03-03 | A kind of geotechnical engineering safety monitoring system based on wireless sensor network technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108198404A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109194715A (en) * | 2018-08-02 | 2019-01-11 | 广州市花林景观工程有限公司 | Hydraulic engineering seepage flow intelligent monitor system |
-
2018
- 2018-03-03 CN CN201810176268.9A patent/CN108198404A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109194715A (en) * | 2018-08-02 | 2019-01-11 | 广州市花林景观工程有限公司 | Hydraulic engineering seepage flow intelligent monitor system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103968800B (en) | A kind of shield tunnel deformation wireless monitor system and method | |
| CN100521779C (en) | Environment monitoring apparatus and system | |
| CN103809537B (en) | Railway tower safety monitoring methods, devices and systems | |
| CN101945472B (en) | Method for positioning multiple moving targets by wireless sensor network syncretized with radio frequency identification | |
| CN105702032B (en) | A kind of monitoring of roadside accident and alarm system | |
| CN206987892U (en) | A kind of prior-warning device for being used to monitor Propagation in Tunnel Disaster | |
| CN108271136A (en) | Geotechnical engineering safety intelligent monitor system | |
| CN102184617A (en) | System and method for monitoring ground surface displacement in real time | |
| CN110017171A (en) | One kind being used for tunnel structure health Life cycle real-time monitoring system | |
| CN102722987A (en) | Roadside parking space detection method | |
| CN103292659A (en) | Electric transmission line conductor sag measuring method based on angle sensor | |
| CN110082498A (en) | A kind of landslide monitoring data unmanned plane acquisition system based on wireless sensor Internet of Things | |
| CN102868751A (en) | Underground target positioning system and method based on distance restriction | |
| CN108955775B (en) | Positioning monitoring device and method with RDSS function | |
| CN103439927A (en) | Remote monitoring method for telegraph pole | |
| CN108171956A (en) | A kind of power transformer environmental monitoring system based on big data and WSN technology | |
| CN108198404A (en) | A kind of geotechnical engineering safety monitoring system based on wireless sensor network technology | |
| CN205156956U (en) | Railway communication iron tower safety detection system | |
| KR102365368B1 (en) | System for monitoring displacement of slope | |
| CN107862834A (en) | A kind of mountain flood monitoring and warning system based on cloud framework | |
| KR20070105488A (en) | System for managing seawater information | |
| CN201820337U (en) | Railway geological disaster forecasting and monitoring system | |
| CN209625401U (en) | A kind of region mountain flood and geological disaster comprehensive monitoring early warning system | |
| CN115798164A (en) | Power distribution tower inclination monitoring method and system influenced by flood disasters | |
| CN109743400B (en) | One kind being used for municipal works reflection wave method device |
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 | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180622 |
|
| WW01 | Invention patent application withdrawn after publication |