CN203644070U - Bulk handling device production data wireless postback system - Google Patents
Bulk handling device production data wireless postback system Download PDFInfo
- Publication number
- CN203644070U CN203644070U CN201320636452.XU CN201320636452U CN203644070U CN 203644070 U CN203644070 U CN 203644070U CN 201320636452 U CN201320636452 U CN 201320636452U CN 203644070 U CN203644070 U CN 203644070U
- Authority
- CN
- China
- Prior art keywords
- data
- instrument
- wireless
- real
- time
- 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 - Lifetime
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 30
- 238000003860 storage Methods 0.000 claims abstract description 15
- 238000005303 weighing Methods 0.000 claims description 17
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 abstract description 8
- 238000004458 analytical method Methods 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 5
- 238000012544 monitoring process Methods 0.000 abstract description 5
- 238000009412 basement excavation Methods 0.000 abstract description 2
- 238000007726 management method Methods 0.000 description 20
- 239000000446 fuel Substances 0.000 description 11
- 239000003921 oil Substances 0.000 description 9
- 230000006870 function Effects 0.000 description 7
- 238000010276 construction Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000013523 data management Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 3
- 230000008520 organization Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000013480 data collection Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 230000005622 photoelectricity Effects 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 241001269238 Data Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 238000013481 data capture Methods 0.000 description 1
- 238000007418 data mining Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Images
Landscapes
- Operation Control Of Excavators (AREA)
- Management, Administration, Business Operations System, And Electronic Commerce (AREA)
Abstract
The utility model discloses a bulk handling device production data wireless postback system. A server is connected with a plurality of user browsers, a plurality of mobile subscribers, a plurality of bridge APs of wired networks and wireless networks. Each of APs is connected with a data acquisition device, which is connected with a portal crane instrument and a loader instrument of a device on a wharf. The system is advantageous in that data acquisition cards are provided, and informatization data acquisition interfaces are unified, and therefore the acquisition, the storage, and the postback of the device data can be realized; by adopting the wireless local network technology, the wireless and real-time acquisition and the wireless and real-time transmission of the production data can be realized, and at the same time, the real-time performance of the data can be improved, and the foundation can be provided for improving the device real-time monitoring and the device data pertinence; the data statistics and the analyzing platform can be built, and the unified storage, the unified management, and the unified analysis of the production information can be realized; the information sharing can be realized, and the platform can be provided for the subsequent data excavation and other works.
Description
Technical field
The utility model belongs to pier facilities management system, particularly a kind of bulk-handling device fabrication data wireless return system.
Background technology
Current, the information-based key factor that day by day becomes port development construction, application by infotech in port construction, production, operation, management and service, farthest realizes information sharing, and has become current promotion low-carbon (LC), green port construction important force.As the supvr of harbour facilities, in equipment control practice in recent years, all the more profoundly realize, improving and the process developing of current harbour facilities, be exactly the information-based process of constantly improving and developing to a certain extent, in this course, a series of new management modes based on infotech progressively form, for port equipment management has injected fresh and alive strength.
The proposition of system, process is improved in informationization
Taking South Sinkiang, PORT OF TIANJIN bulk-handling harbour as example, its informationization to the operation such as trestle crane, shovel loader major equipment drops into and the dynamics of improving is the trend strengthening year by year, and main building-up work has:
2009 is hoisting loading apparatus loading quality, for shovel loader is installed import shovel loader weighing instrument;
2011, implement the transformation of door machine overload device, make it in moment restriction, possess function of measuring;
2012, implementing on the basis of door machine overload transformation, utilize IC-card to realize the management of door machine driver unit piecework wage.This management belongs in group first Application in bulk cargo terminals company.
2013, for shovel loader, fuel flowmeter is installed, bicycle fuel oil service condition is carried out to accurate-metering
2013, utilize the Informationization Equipments such as weighing instrument, the management of reckoning by the piece of the unit of having realized loader engineer;
2013, for door machine is installed electric power meter, realize the metering of door machine power consumption by IC-card.
The enforcement of a series of information-based Perfect the works of current Shortcomings, provide device resource for being originally difficult to realize the functions such as the metering of door machine operation amount, shovel loader real-time fuel consumption, shovel loader entrucking metering, simultaneously also for the management of facilities and equipments operating personnel unit piecework wage is laid a good foundation, by awarding the diligent and punishing the lazy, effectively transfer employee's work incentive.In making full use of information-based means and promoting operation quality and efficiency, we have also realized in practice current informationization and have also existed and need further research and perfect problem, mainly contain following some:
The one, information gathering point disperses, collect means is various, is difficult to statistics.Company's existing equipment is gone into operation more than 10 years mostly, its Informationization Equipment is according to the actual demand of equipment control or production to be increased successively, cause information point to be disperseed, the mode of information has the various ways such as the receipt of printing, IC-card, flash memory, and Data Collection difficulty is large.
The 2nd, data synchronism can not meet the demands.Taking the information system management of energy consumption as example, in conjunction with working condition, equipment being started shipment to ton unit consumption, to carry out statistical study meaning larger, this just require originated tonnage according to and energy consumption data can carry out according to time point correspondingly, ensure that unit consumption data are true.And in practical application, because Weighing and energy measurement are two cover systems, be difficult to accomplish the accurate correspondence of data time point.
The 3rd, the post analysis management difficulty of data is larger.Each information-based device has the pipe software that meets self-demand, management data separately.In actual production, if want to carry out comprehensive data analysis, will be subject to many restrictions such as different system, different data format, disparate databases.
The 4th, quantity of information deficiency.Each device only design data relevant to self gathers, for haveing nothing to do with self but equipment control being had to the information acquisition quantity not sufficient of greater significance.For example shovel loader weighing instrument, only possesses " entrucking " a kind of job state pattern optional, once equipment carries out the operations such as stack, lower cabin, status information cannot be added up.
Utility model content
Technical problem to be solved in the utility model is: a kind of bulk-handling device fabrication data wireless return system is provided.Reach information gathering point optimization, collect means unification, be convenient to statistics; Data synchronism is strong, is convenient to the post analysis management of data, and information completely, is convenient to management.
The technical solution of the utility model is:
A kind of bulk-handling device fabrication data wireless return system, is characterized in that: the bridge AP that is connected multiple user browsers, multiple mobile subscriber, multiple wired network and wireless network by server; Each AP connection data harvester, each data collector connects the instrument of equipment on harbour: door machine instrument, shovel loader instrument.
Described data collector has core board, has mass storage, serial ports, parallel port on core board, and mass storage connects these serial ports and parallel port; Serial ports on core board is outwards connected photoisolator with parallel port, and photoisolator connects respectively 16 way switch, WIR module and multiple level conversion; Level switch module is connection traffic meter, electric energy instrument, door machine limiter of moment and weighing instrument respectively.
The utility model effect is:
It mainly possesses following functions: the one, and design data capture card, unified each information-based data acquisition interface, gathers, stores and return current each device data; The 2nd, employing wireless local area network technology, realizes that production data is wireless, Real-time Collection and transmission, gives up the inefficient data acquisition modes such as original printing receipt, IC-card, and employee is freed from stiff data transmission work.Promote real-time property, for device real-time monitoring, device data promote and lay the foundation targetedly simultaneously; The 3rd, build data statistics and analysis platform, realize production operation information and unify storage, unified management, unified analysis, fully realize sharing of information, and provide platform for work such as late time data excavations; The 4th, on the basis of device data acquisition, further add large information capacity, increase the information such as operation ship name, freight space, cargo storage place, for the informationization of organization of production creates conditions.
Brief description of the drawings
Fig. 1 is the structural drawing of bulk-handling device fabrication data wireless return system
Fig. 2 is the data collector theory diagram of bulk-handling device fabrication data wireless return system
Embodiment
A kind of bulk-handling device fabrication data wireless return system as shown in Figure 1, 2, is connected the bridge AP of multiple user browsers, multiple mobile subscriber, multiple wired network and wireless network by server; Each AP connection data harvester, each data collector connects the instrument of equipment on harbour: door machine instrument, shovel loader instrument.
Described data collector has core board, has mass storage, serial ports, parallel port on core board, and mass storage connects these serial ports and parallel port; Serial ports on core board is outwards connected photoisolator with parallel port, and photoisolator connects respectively 16 way switch, WIR module and multiple level conversion; Level switch module is connection traffic meter, electric energy instrument, door machine limiter of moment and weighing instrument respectively.
Bulk-handling device fabrication data wireless return system:
Installation data collection on every door machine and shovel loader, return device, application interface technology, gathers data such as the metering of site work amount, oil consumption, electric energy instruments.First the data that gather are stored in the built-in storer of capture card, guarantee data security., data are sent in the server of LAN (Local Area Network) in real time by wireless network card and LAN (Local Area Network) WAP, user can conduct interviews to server data by PC and other mobile clients meanwhile.
Meanwhile, on server, design a set of data management platform, be convenient to the device fabrication data of real-time reception to add up and manage, utilize data to instruct activities such as equipment daily management, organizations of production, for management decision provides foundation.
Data acquisition
Realize the data mining in production data real-time management, statistical study and even the later stage of the bulk-handling equipment such as a machine, shovel loader, precondition is that required handling machinery basic status and job information are carried out to real-time collection and passback.
Trestle crane work data
The information that bulk goods operation door owner will gather has device numbering, operating personnel's job number, operation goods class, operation technique, power consumption etc., and details are in table 1.
Table 1 machine gathers Back ground Information table
| Sequence number | Title | Explanation | Remarks |
| 1 | Door plane No. code | No. 1-7 | Door machine operation, sends after driver's entry information |
| 2 | Job number | Correspondence name driver teams and groups photo | Door machine operation, sends after driver's entry information |
| 3 | Series of lot | A0 coke a1 nickel minerals a2 .... | Door machine operation, sends after driver's entry information |
| 4 | Single hook net weight | The every hook weight of bicycle (ton) | Each hook is passed data back |
| 5 | Entry time | Hour minute second date | Door machine operation, sends after driver's entry information |
| 6 | Running time | Hour minute second | Single operation duration |
| 7 | Action type | Loading unloading moves storehouse | Door machine operation, sends after driver's |
| 8 | Overload number of times | Inferior | According to retrieval time section change |
| 9 | Power consumption | Degree | According to retrieval time section change |
| 10 | Failure code | The states such as door machine fault | Want the corresponding failure message of typing code |
Wherein, door machine operation numbering, operating personnel's job number, working condition and workload information are gathered by door machine overload instrument (model LX-W); Operation power consumption adopts the DSS633 three-phase electric energy instrument that possesses electrical energy pulse sending function to gather; Failure message is directly exported 6 scale-of-two failure codes and is realized in the time that door machine breaks down by door machine Programmable Logic Controller.
Shovel loader work data
Bulk goods operation shovel loader is mainly used in carrying out the operations such as entrucking, stack, lower cabin, and the information that can reflect its job state has the information such as instrument table number (car number), driver's job number, single and accumulative total entrucking weight, instantaneous and accumulative total oil consumption.Details are in table 2.
Wherein, the information such as instrument table number, job number, entrucking weight is gathered by T2000 type shovel loader weighing instrument; Information is gathered by fuel flowmeter when instantaneous and accumulative total oil consumption, operation post etc.; Trouble of loader information gathers from shovel loader running control system.
Table 2 shovel loader gathers Back ground Information table
| Sequence number | Title | Explanation | Remarks |
| 1 | Instrument table number | License number | Weighing instrument, car loading operation triggers and sends |
| 2 | Job number | Corresponding name driver | Weighing instrument, car loading operation triggers and sends |
| 3 | Article No. | ? | Weighing instrument, car loading operation triggers and sends |
| 4 | Pound | ? | Weighing instrument, car loading operation triggers and sends |
| 5 | Tired heavy | Bicycle is tired heavy | Weighing instrument, car loading operation triggers and sends |
| 6 | Time | Hour minute second date | Weighing instrument, car loading operation triggers and sends |
| 7 | Table number | License number | Fuel flowmeter, upgrades for every 5 |
| 8 | Oil consumption aggregate-value | ? | Fuel flowmeter, upgrades for every 5 seconds |
| 9 | Time | Hour minute second date | Fuel flowmeter, upgrades for every 5 seconds |
| 10 | Failure code | Trouble of loader state | Reserved |
Data collector design number harvester is taking STM32 high-performance arm processor as core, use computer communication technology is means, integrate multiple intelligent instrument, by the special purpose computer control device of production data Real-time Collection, storage the transmission of shovel loader and door machine.Its schematic diagram is as shown below:
This device is made up of following part:
That STM32 system is used is STM32F103RC, has the functional parts such as 72M dominant frequency, 256KFLASH, 48KRAM, 5USART serial ports, SPI interface, IIC interface, real time clock and house dog.Harvester uses the part such as its FLASH, RAM, 3 USART serial ports, real time clock, house dog, IIC and SPI interfaces.
Large capacity storage W25X64
STM32 joins through SPI interface and W25X64.W25X64 has 32768 pages able to programme, and every page of 256 bytes, provide the storage of 8M byte, can store more than 120,000 of the record of 64 bytes.
Under the not good condition of wireless network signal quality, as cabin operation under shovel loader, harvester can first be stored in the data of collection in storer, concentrates passback after signal takes a turn for the better.According to data, fuel flowmeter occurs and produce data the most every 5 seconds and calculate, per hourly can produce approximately 720 data, storer can provide the storage space of 166 hours, has ensured the reliability of data.
Power module
The power unit of communicator adopts the modular power source that LM2596 is core, wide input voltage range (direct current 8-44V, interchange 6-36V), and output power large (5V output can reach 3A), antijamming capability is strong.
The output of power module to STM32 core and periphery power supply thereof, becomes 3.3V to WIFI module for power supply through LM117 through 5S3.3 insulating power supply.
16 way switch amount inputs
Number passes device has 16 way switch amount inputs to be connected in the parallel port of STM32 through photoelectricity isolation, the running status of shovel loader or door machine can be collected in system and passes to count in data center server.
Serial port
The serial ports 1 and 3 of STM32 through photoelectricity isolation and 232 level conversion can with 232 interfacing equipments or Instrument connection, obtain operational data in equipment or instrument.Serial ports 1 can connect shovel loader fuel flowmeter and door machine limiter of moment, and serial ports 3 can connect the weighing instrument of shovel loader.
Data wireless passback
Construction of Wireless LAN
The each production data of equipment is being concentrated on the basis that gathers storage, the equipment of opposite house machine, this class of shovel loader to move is realized real-time Transmission and the management of data, and adopting radio data-transmission equipment to return data is comparatively reasonably implementation of one.
For this reason, company shuts down regional construction AP(AccessPoint at operation field and shovel loader) 8, this AP equipment possesses 250 meters of network expansion scopes, has realized comprehensive covering of wireless network, for the wireless backhaul of data provides data channel.
Wireless network data transmission
Data collector is designed with WIFI module, and this WIFI module is supported 802.11b/g/n wireless standard, and built-in TCP/IP procotol is supported transparent transmission mode, can realize data wireless passback through exploitation.Meanwhile, communicating by letter of harvester and data center adopts TCP mode to communicate by letter, and can guarantee that data can not lose, and historical data functions of retransmission is provided, and can be retransmitted to center by being kept at the historical datas that number passes in devices.
Data management platform
After completing the passback work of data, how scientific utilization production data, carries out statistics and the processing in later stage, is really reached for management decision, organization of production, equipment control foundation is provided, and is to determine that whole system builds the key of success or failure.
Extensively carrying out on the basis of investigation, company adopts B/S(browser/server) structure carried out development to management software, system is divided into a machine Product Data Management, shovel loader Product Data Management two large divisions, now, taking shovel loader management as example, system exemplary functions and applicable cases are introduced.
When operation post, add up
Utilize this system, can be according to real-time statuss such as fuel flowmeter, shovel loader weighing instruments, judgment device state, added up for device standby time, car loading operation time, stack activity duration.In addition, can be using the device standby time as the examination standard that improves organization of production level, lifting energy utilization rate.
Form retrieval
User of service can pass through the information such as select time section, license number, order of classes or grades at school, operating personnel's job number in system, the information such as oil consumption during to operation post, when the loading of freight waggon, real-time fuel consumption, accumulative total oil consumption, entrucking unit consumption, platform, fuel cost are retrieved, and form form.
The inquiry of historical data
By information such as typing time, license number, operation order of classes or grades at school, personnel, can retrieve in oil consumption, the entrucking weighing data details of historical certain time period equipment, realize historical data and reviewed.
Icon is expressed
Retrieve and generate corresponding oil consumption/work amount curve according to activity duration, vehicle number, according to curve, can analyze situations such as VE Vehicle Economy, power-save operation method applicable cases, unit cost, goods class task difficulties.
Can generate the charts such as histogram, pie chart to corresponding data according to managerial demand is analyzed simultaneously, provide possibility for implementing online " operating energy-conservation tourney ", encouraged to the full extent the difficulty of organizing of the activity such as employee work enthusiasm, reduction tourney.
Monitoring in real time
Be designed with real-time monitoring interface, for vehicle, current real-time information is monitored, and the information that can monitor comprises: license number, order of classes or grades at school, name (job number), instantaneous oil consumption, job state, accumulative total entrucking ton etc.
Failure logging
Can retrieve trouble of loader information according to information such as time, license number, fault types.
Applicable cases
After system Construction completes, enter operation and the later stage improve the stage, modules normal operation.The one, data transmission success reaches 100%, and particularly, in the unsettled situation of network signal, data security has obtained good guarantee; The 2nd, application loader production data real-time monitoring and control, can understand machine operation and production operation situation in time; The 3rd, application system statistical function, adds up the data such as ton, energy consumption of starting shipment of equipment unit, by data such as contrast unit consumption, operating efficiencies, operating personnel's technical ability is assessed, and the earth has been transferred personnel's job enthusiasm simultaneously; The 4th, the comparatively popular B/S structure that system adopts, can, by PC or mobile terminal to the system operation that conducts interviews, be used simple and convenient without client is installed.
Claims (2)
1. a bulk-handling device fabrication data wireless return system, is characterized in that: the bridge AP that is connected multiple user browsers, multiple mobile subscriber, multiple wired network and wireless network by server; Each AP connection data harvester, each data collector connects the instrument of equipment on harbour: door machine instrument, shovel loader instrument.
2. bulk-handling device fabrication data wireless return system according to claim 1, is characterized in that: described data collector has core board, and on core board, have mass storage, serial ports, parallel port, mass storage connects these serial ports and parallel port; Serial ports on core board is outwards connected photoisolator with parallel port, and photoisolator connects respectively 16 way switch, WIR module and multiple level conversion; Level switch module is connection traffic meter, electric energy instrument, door machine limiter of moment and weighing instrument respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320636452.XU CN203644070U (en) | 2013-10-16 | 2013-10-16 | Bulk handling device production data wireless postback system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320636452.XU CN203644070U (en) | 2013-10-16 | 2013-10-16 | Bulk handling device production data wireless postback system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203644070U true CN203644070U (en) | 2014-06-11 |
Family
ID=50875298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320636452.XU Expired - Lifetime CN203644070U (en) | 2013-10-16 | 2013-10-16 | Bulk handling device production data wireless postback system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203644070U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103559601A (en) * | 2013-10-16 | 2014-02-05 | 天津港焦炭码头有限公司 | Wireless postback system of production data of bulk cargo loading and unloading equipment |
-
2013
- 2013-10-16 CN CN201320636452.XU patent/CN203644070U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103559601A (en) * | 2013-10-16 | 2014-02-05 | 天津港焦炭码头有限公司 | Wireless postback system of production data of bulk cargo loading and unloading equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103559601A (en) | Wireless postback system of production data of bulk cargo loading and unloading equipment | |
| CN201757929U (en) | Fully wireless networked power consumer power consumption information acquisition system | |
| CN102005821B (en) | Integrated automation terminal of intelligent station area | |
| CN102354178B (en) | Energy efficiency monitoring system | |
| CN102969796B (en) | Near-real-time electric quantity monitoring and dispatching management system for rural power grid | |
| CN102013155B (en) | Remote meter reading system utilizing time division (TD) network and implementation method thereof | |
| CN103034213A (en) | Remote monitoring and controlling system | |
| CN202141765U (en) | Base station electricity utilization information collecting and monitoring system | |
| CN102855525A (en) | System and method for forecasting and analyzing load of resident user | |
| CN103941312A (en) | Remote rainfall monitoring system | |
| CN201859537U (en) | Multifunctional bandwidth power carrier concentrator | |
| CN101354577A (en) | Solar power station remote wireless monitoring method | |
| CN101853564A (en) | Wireless remote meter reading and electrical energy management system | |
| CN102122429A (en) | Intelligent wireless meter reading device for electrical locomotive | |
| CN105467951A (en) | Bridge-type grab ship unloader work online monitoring and performance assessment system and method | |
| CN203644070U (en) | Bulk handling device production data wireless postback system | |
| CN202120433U (en) | Meter reading system | |
| CN201340536Y (en) | Power equipment remote monitoring system | |
| CN204010288U (en) | A kind of power information remote wireless terminal collector | |
| CN203038073U (en) | Bus type intelligent water meter, electricity meter and gas meter centralized management system | |
| CN201819954U (en) | 0.5-level single-phase electronic energy meter | |
| CN201773298U (en) | Electric energy monitoring system for container loading and unloading machines | |
| CN201689131U (en) | Wireless long-distance meter-reading and electric energy management system | |
| CN208674966U (en) | Grid operating monitoring intelligent management device | |
| CN202711453U (en) | Remote meter reading system based on WCDMA (Wideband Code Division Multiple Access) network |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140611 |
|
| CX01 | Expiry of patent term |