CN101477364A - Forwarding data system between system databases - Google Patents
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- CN101477364A CN101477364A CNA2008102080842A CN200810208084A CN101477364A CN 101477364 A CN101477364 A CN 101477364A CN A2008102080842 A CNA2008102080842 A CN A2008102080842A CN 200810208084 A CN200810208084 A CN 200810208084A CN 101477364 A CN101477364 A CN 101477364A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention relates to a data transmission system between system databases, which comprises a control and data acquisition system, a source database which is positioned inside a monitoring computer in the control and data acquisition system, an application system and a target database which are positioned inside an application network, and a data transmission system and two network cards which are arranged inside an intermediate computer, wherein the data transmission system is communicated and connected with the source database through one network card and communicated and connected with the target database through the other network card; and the application system acquires data information in the source database through the data transmission system, and the data information in the source database is transmitted to the application system through the data transmission system and stored in the target database. The source database and the target database perform data transmission through the data transmission system and direct data flows can not be generated, so that data transmission is safe and reliable. Moreover, the data transmission system between the system databases avoids the inconvenience due to requirement of special hardware communication interface software when acquiring data from the control and data acquisition system.
Description
Technical field
The present invention relates to a kind of data forwarding system, be specifically related to the forwarding data system between a kind of system database.
Background technology
In the higher manufacturing enterprise of automaticity, moving SCADA system (Supervisory Control And Data Acquisition supervisory control and data acqui sition system) usually, be used for streamline or technological process are controlled automatically.The so-called configuration software of the upper computer software that moves on the SCADA system monitoring terminal computing machine (or claiming upper computer control system) (or claiming configuration system), it shows the operating condition of production procedure and major equipment intuitively by patterned way.Also can control field apparatus simultaneously by man-machine interaction mode.Configuration system can also be according to certain interval time data being sampled and being saved in the SCADA database when gathering and showing the real time data of field control equipment.Fig. 1 has illustrated the typical structure of SCADA system of manufacturing enterprise.
As shown in Figure 1, communicate by Ethernet, fieldbus between the PLC in the SCADA system (Programmable Logic Controller programmable logic controller (PLC)), DCS (Distributed Control System scattered control system) and the configuration system.In order to guarantee the stability and safety operation of SCADA system, usually need set up a relatively network environment of sealing for the SCADA system, at the network of SCADA system and be equipped with the isolation of carrying out certain mode between the administrative office network, the Internet of application system (software), to take precautions against virus, network intrusions equivalent risk factor.Quarantine measures commonly used comprise that physics disconnects, distributes different IP subnet section, hardware firewall etc. is installed.
In manufacturing enterprise, also can move other application software usually, for example resource management software, operation Report Server Management software, risk status supervision software etc.These software systems need to obtain the data of SCADA system acquisition in real time or aperiodically, so that finish some management function.
For example: the asset management system (EAM, Enterprise Asset Management) needs the accumulated running time data of acquisition equipment, so that the Check and Maintenance plan of the equipment of formulation.The operation report management system need obtain different equipment startup-shutdown, faults constantly and whether wait data, so that produce the equipment operation statistical report form.Data such as the quantity that application system (software) the needs acquisition factory of governmental environmental monitoring department discharges pollutants constantly in difference, concentration.In addition, application software system such as data mining and operational decisions support software, equipment failure inline diagnosis software all needs to obtain the data of SCADA system acquisition.But because the communication network relative closure of SCADA system makes to address that need the difficulty that becomes.
Some appearred from the mode of SCADA system to other application systems (software) forwarding data, the OPC that relatively is widely known by the people (OLE for Process Control is used for the OLE of flow process control) standard, DDE (exchange of Dynamic Data Exchange dynamic data) technology in the same time.Because the Performance And Reliability of DDE technology is very low, the few employing to the utmost in industrial scale applications.
The OPC standard is based on the OLE technology of Microsoft, and it is by providing standard set OLE/COM interface for to set up information bridge based on application program and the field process devices of Windows.Software vendor is according to OPC standard development OPC client-side program, by the opc server program that OPC interface accessing hardware producer or third party provide, can realize and the communicating by letter of hardware device, and avoided writing driver respectively for different hardware.Fig. 2 A and Fig. 2 B have illustrated the dual mode that obtains data in the SCADA system by the OPC technology.Fig. 2 A is the supervisory control comuter that is equipped with the data forwarding program in the SCADA system, the OPC client is connected to opc server in supervisory control comuter, opc server is connected with PLC, and the application system that is arranged in administrative office networking is directly carried out data with the data forwarding program of SCADA system supervisory control comuter and exchanged.Fig. 2 B is arranged in the opc server connection of administrative office networking application system OPC client with administrative office networking, opc server be positioned at the intrasystem PLC of SCADA and directly carry out data and exchange.
The advantage of OPC technology is to have realized a kind of standardized interface mode, has shielded the communication protocol details of the field control equipment of producing with different manufacturers, makes software be easy to realize a kind of general data acquisition interface.But the OPC technology also has the some shortcomings part.Can learn that from Fig. 2 A and Fig. 2 B OPC technical requirement data acquisition software is directly visited the SCADA network, there is adverse effect in the network security of SCADA system.Also can enlarge markedly the communication flows of SCADA network by OPC interface accessing field control equipment, under a fairly large number of situation of opertaing device signaling point, cause network service to block up sometimes at the scene.In addition, gather data if desired, need buying and multiple special opc server software is installed and field control equipment communicates interface, not only increase cost, also strengthened whole complicacy from the field control equipment of different manufacturers.
Summary of the invention
The purpose of this invention is to provide a kind of system that obtains and transmit data from the SCADA system, can overcome the OPC technology the network security of SCADA system and the adverse effect of communication flows.Can adapt to configuration systems different in the SCADA system platform, field control equipment, and not need to buy special hardware communication interface software separately for data forwarding.In the reduced data repeating process, improve efficient from SCADA system acquisition data.
To achieve the above object, the technical scheme of being taked is: a kind of forwarding data system between system databases is provided, comprise: control and data acquisition system (DAS), be positioned at the supervisory control comuter of control and data acquisition system (DAS), place the configuration system in the supervisory control comuter, source database that is connected with configuration system and programmable logic controller (PLC);
Application network is positioned at the application system and the target database of application network;
Intermediate computer places the data forwarding system in the intermediate computer and places two network interface cards on the intermediate computer; Data forwarding system connects with source database network service by a network interface card; Data forwarding system connects with target database network service by another network interface card;
The described application system that is arranged in application network is obtained the data message of source database by the data forwarding system of intermediate computer; Data message in the source database is transferred to application system by the data forwarding system in the intermediate computer and stores in the target database.
As above-mentioned structure, the present invention uses an intermediate computer service data repeater system (software), and intermediate computer has been equipped with two network interface cards, is connected to the network segment of SCADA grid and the network segment of application network respectively.In order to improve internet security, on intermediate computer, fire wall can be installed, the necessary port of only open data forwarding.Data forwarding system (software) reads the related data of the field control equipment of being preserved by configuration system (software) according to certain time interval from the source database (SCADA database) of SCADA system, repeater system according to the data forwarding rule with these data forwarding to application system and be saved in the target database (application system database).
The measured database connecting mode of connection between described data forwarding system homology (SCADA) database and target (application system) database, as comprise ODBC (connection of OpenDatabase Connectivity open database) etc.Data forwarding process only carries out between two databases, does not form direct data stream at the scene between the application system (software) of opertaing device and ultimate demand data.The forwarding time of data forwarding system (software) can be adjusted at interval, to adapt to different data usage requests.Data forwarding system (software) can also carry out data relatively, only transmits the data that change, so that reduce network traffic data and memory data output.
Description of drawings
Fig. 1 is the synoptic diagram that the SCADA system exchanges with application system data in the administrative office network by Ethernet in the prior art;
Fig. 2 A and Fig. 2 B are the dual mode synoptic diagram that obtains data in the SCADA system in the prior art by the OPC technology;
Fig. 3 transmits the structural representation of data system one embodiment for the present invention;
Fig. 4 is all data table related in the data forwarding process;
Fig. 5 is for placing the structural representation of data forwarding system in the intermediate computer (software) embodiment;
Fig. 6 is the structural representation of database data forwarding module one embodiment;
Fig. 7 is the process flow diagram of database data forwarding module.
Embodiment
Further specify the architectural feature that the present invention transmits data system below in conjunction with drawings and Examples.
Fig. 3 is the structural representation of forwarding data system between system databases one embodiment of the present invention.As shown in Figure 3, the present invention transmits data system
Comprise SCADA (control and data acquisition system (DAS)) system 30, be positioned at the supervisory control comuter 301 of control and data acquisition system (DAS) 30, place the configuration system (configuration software) 302 in the supervisory control comuter 301, with configuration system 302 joining PLC (programmable logic controller (PLC)s) 304 and source database (or claiming the SCADA database) 303;
Comprise application network 32 (in the present embodiment, being administrative office network), be positioned at application system (software) 321 and the target database (or claiming application system database) 322 of application network 32;
Comprise: intermediate computer 31 places the data forwarding system (or claiming data forwarding software) 311 in the intermediate computer 31; Place two network interface cards 312,313 on the intermediate computer 31; Described data forwarding system 311 connects by 30 interior source database 303 network services of network interface card 312 and SCADA system; Data forwarding system 311 connects with target database (application system database) 322 network services by network interface card 313.
As above-mentioned structure, data forwarding system from source database collection and forwarding data, because data logger has similar structure usually in the source database, the field that can discern the source data record sheet according to configuration information constitutes, and and the definition of target measuring point mate, with the purpose table of specified data forwarding, i.e. measuring point data record sheet.Data forwarding system reads its state-of-the-art record, and filters out the field data that has changed according to the time interval timing scan source data record sheet that can be provided with, and writes the measuring point data record sheet.
Fig. 4 is a data table related included in the data forwarding process.Comprise N ≧ 1 a source data record sheet 3031 in the described source database 303.As shown in Figure 4, comprise A, B ..., multiple source data logger 3031 such as N.
As shown in Figure 4, comprise database table in the described target database 322, database table comprises site definitions table 3221, measuring point definition list 3222 and N ≧ 1 a measuring point data record sheet 3222.
The field feature information of certain source data record sheet 3031 in the database of source (SCADA) described respectively in each bar record in the described site definitions table 3221.
Each bar of described measuring point definition list 3222 writes down a measuring point of corresponding field apparatus.
Described N ≧ 1 (a plurality of) measuring point data record sheet 3222, each table is deposited whole historical datas of a measuring point of field apparatus.
The required configuration information of described data forwarding leaves in site definitions table 3221 and the measuring point definition list 3222.
Table 1 is an exemplary embodiments of source data record sheet 3031 in source database (the SCADA database) 303.
Table 1
| Increment serial number ID | Writing time RecTime | Enter flow Flowln | Pressure P ressure | Temperature 1 Temp1 | Temperature 2 Temp2 | ... |
| 1002 | 2007-02-22 14:45:35 | 24.40 | 0.247 | 121.6 | 129.3 | ... |
| 1003 | 2007-02-22 14:46:35 | 2580 | 0.312 | 124.9 | 1288 | ... |
| 1004 | 2007-02-22 14:47:35 | 26.27 | 0.465 | 126.4 | 125.7 | ... |
| ... | ... | ... | ... | ... | ... | ... |
As shown in table 1, its architectural feature is: an increment serial number field is arranged as major key, have the field of a character or time on date type to be used for the record data acquisition time, other each fields are represented the measuring point data of a field control equipment.Configuration system (software) inserts a record to this table at regular intervals, and the transient data of each measuring point is filled up to the field of measuring point correspondence.
Table 2 is exemplary embodiments of site definitions table 3221 in the target database 322.
Table 2
| Period SitelD stands | Title Name | Table name claims TableName | Writing time field name DTColName | Increment serial number field name IDColName |
| 1 | The water treatment zone data | WaterData | RecTime | ID |
| 2 | Mud treatment region data | MudData | RecTime | ID |
| ... | ... | ... | ... | ... |
As shown in table 2, its architectural feature is: have a table name to claim field, write down the title of corresponding source data record sheet 3031.Have one writing time the field name field, corresponding source data record sheet 3031 writing time field title.An increment serial number field name field is arranged, the title of the increment serial number field of corresponding source data record sheet 3031.
Table 3 is exemplary embodiments of measuring point definition list 3222 in target database 322 application system database.
Table 3
| Measuring point numbering MPointlD | Title Name | Measuring point code MPointCode | Period SitelD stands | Numerical value Value | Writing time RecTime | Type Type |
| 1 | Flow of inlet water | Flowln | 1 | 26.27 | 2007-02-22?14:45:35 | A |
| 2 | Pressure | Pressure | 1 | 0.465 | 2007-02-22?14:46:35 | A |
| ... | ... | ... | ... | ... | ... | ... |
As shown in table 3, its architectural feature is: a measuring point number field is arranged as major key.A measuring point code field is arranged, and its value equals the title of certain measuring point field in the source data record sheet 3031.Have one writing time field, the record data final updating time.A numeric field is arranged, the up-to-date numerical value of record measuring point.
Table 4 is exemplary embodiments of measuring point data record sheet 3223 in target database 322 application system database.
Table 4
| Serial number ID | Data recording time D ataDT | Numerical value Value |
| 4350 | 2007-02-22 14:45:35 | 24.40 |
| 4351 | 2007-02-22 14:46:35 | 25.80 |
| 4352 | 2007-02-22 14:47:35 | 26.27 |
| ... | ... | ... |
As shown in table 4, measuring point data record sheet 3223 is object tables of data forwarding, and its architectural feature is: table name be called one fixedly prefix add certain measuring point numbering.There is one from increasing the serial number field as major key.Data field writing time is arranged, and record data insert the time.A numeric field is arranged, record measuring point numerical value.Each measuring point data record sheet 3223 all with measuring point definition list 3222 in certain line item correspondence, both associations are measuring point numberings.
Fig. 5 is the structural representation of described data forwarding system (software) 311 1 embodiment.As shown in Figure 5, described data forwarding system 311 comprises 4 modules.Comprise timer-triggered scheduler module 3111, with timer-triggered scheduler module 3111 joining database data forwarding module 3112 and OPC data forwarding modules 3113, with database data forwarding module 3112 and OPC data forwarding module 3113 joining log patterns 3114.
Described timer-triggered scheduler module 3111 is used for regularly log-on data database data forwarding module 3112 (concrete structure of database data forwarding module 3112 as shown in Figure 6) or OPC data forwarding modules 3113; OPC data forwarding module 3113 adopts the OPC technical design.Logger module 3114 is used for writing down the various information of repeating process.
As above-mentioned structure, during operation, timer-triggered scheduler module 3111 triggers according to pre-set time interval, log-on data database data forwarding module 3112 or OPC data forwarding module 3113, and what data forwarding system 311 acquiescences started usually is database data forwarding module 3112.But both effects of database data forwarding module 3112 and OPC data forwarding module 3113 are equivalent.Database data forwarding module 3112 (or OPC data forwarding module 3113) reading of data from the site definitions table 3221 of target database 322 and measuring point definition list 3222 is transmitted required configuration information, reading of data from the source data record sheet 3031 of source database 303, guidance according to configuration information is resolved data, inserts in the measuring point data record sheet 3223 corresponding in target (application system) database 322.If can't use database data forwarding module 3112 because of being restricted, allow initialization system to start OPC data forwarding module 3113, gather and transmit data by the OPC technology.The function of database data forwarding module 3112 and OPC data forwarding module 3113 is equivalent, is the technology difference that adopts, to adapt to different network environments.Various information records (storage) are in log pattern 3112 in all repeating processs.
Fig. 6 is the detailed structure of database data forwarding module 3112 among Fig. 5.As shown in Figure 6, described database data forwarding module 3112 comprises with source database 303 networkings and communicating to connect and the source database that is connected with timer-triggered scheduler module 3111 inquiry submodule 31121, connect and the configuration information inquiry submodule 31122 that is connected with timer-triggered scheduler module 3111 with target database 322 network services, transmit submodule 31123 and switching value data forwarding submodule 31124 with source database inquiry submodule 3111 joining analog datas respectively, analog data transmits submodule 31123 and switching value data forwarding submodule 31124 all connects with target database 322 network services.
As above-mentioned structure, timer-triggered scheduler module 3111 starts configuration information inquiry submodule 31122 reads site definitions table 3221 and measuring point definition list 3222 from target database 322 record, synthesize the field configuration information of source data record sheet 3031, pass to source (SCADA) data base querying submodule 31121.Inquire about state-of-the-art record in the source data record sheet 3031 of source database inquiry submodule 31121 from source (SCADA) database 303, pass to analog data and transmit submodule 31123 and switching value data forwarding submodule 31124.Analog data is transmitted submodule 31123 and is transmitted submodule 31124 respectively with in the measuring point data record sheets 3222 different in the two class data insertion target database 322 with switching value data.
Described analog quantity refers to the continually varying signal, as electric current, flow, pressure etc.Switching value refers to the signal of discontinuous variation, as water pump start-stop, valve folding etc.The rate of change of analog quantity is higher, requires according to the fixed sampling frequency continuous recording usually.And the switching value rate of change is lower, adopts the mode that changes the back storage usually, to reduce storage space.Analog quantity is transmitted according to different rules with switching value, can be improved forwarding speed, can save data space again simultaneously.
Fig. 7 is the process flow diagram of database data forwarding module 3112.In step 1101 and 1102, configuration information inquiry submodule 31122 in target database site definitions table 3221 and measuring point definition list 3222 read configuration information; Step 1103 finds source data record sheet 3031 according to configuration information in the database of source (SCADA), and analyzes its field structure, judges the corresponding relation of measuring point data record sheet 3223 in each field and the target database; Select maximum serial number mode in step 1104 by the numeric field that increases certainly, obtain state-of-the-art record wherein source data record sheet 3031; Step 1105 and 1106 pairs of word for word section circulations of this record; Step 1107 checks whether the data of each field change, and mainly is the preceding secondary data comparison field current data according to each measuring point of measuring point definition list 3222; If data variation then in step 1108, transmit submodule 31123 and switching value data and transmit submodule 31124 data are inserted into measuring point data record sheet 3223 corresponding in the intended application system database 322 by analog data.Above-mentioned flow process triggers automatically according to setting cycle, continues to transmit data from source database 303 in target database 322.
Most preferred embodiment is described although The present invention be directed to, and the present invention is not limited to this embodiment.Various modifications within the present invention's spirit scope will be conspicuous for a person skilled in the art.Scope of the present invention will be limited by claims.
Claims (8)
1. forwarding data system between system databases comprises:
Control and data acquisition system (DAS) are positioned at the supervisory control comuter of controlling with data acquisition system (DAS), place the configuration system in the supervisory control comuter, with joining source database of configuration system and programmable logic controller (PLC);
Application network is positioned at the application system and the target database of application network;
It is characterized in that comprising:
Intermediate computer places the data forwarding system in the intermediate computer and places two network interface cards on the intermediate computer; Data forwarding system connects with source database network service by a network interface card; Data forwarding system connects with target database network service by another network interface card;
Described application system is obtained data message in the source database by the data forwarding system in the intermediate computer; Data message in the source database is transferred to application system by the data forwarding system in the intermediate computer and stores in the target database.
2. forwarding data system between system databases according to claim 1, it is characterized in that placing the data forwarding system in the intermediate computer to comprise: the timer-triggered scheduler module, with joining database data forwarding module of timer-triggered scheduler module and OPC data forwarding module, with database data forwarding module and the joining log pattern of OPC data forwarding module.
3. forwarding data system between system databases according to claim 2 is characterized in that, the function of database data forwarding module and OPC data forwarding module is equivalent, can use any one module among both to carry out data forwarding.
4. forwarding data system between system databases according to claim 1 and 2, it is characterized in that described database data forwarding module comprises with the source database networking communicates to connect and the source database that is connected with timer-triggered scheduler module inquiry submodule, connect and the configuration information inquiry submodule that is connected with the timer-triggered scheduler module with target database network service, linking with source database inquiry submodule respectively, analog data is transmitted submodule and switching value data is transmitted submodule, and analog data is transmitted submodule and switching value data forwarding submodule all connects with target database network service.
5. forwarding data system between system databases according to claim 1 is characterized in that comprising in the described source database N ≧ 1 a source data record sheet.
6. forwarding data system between system databases according to claim 1 is characterized in that comprising database table in the described target database, comprises site definitions table, measuring point definition list and N ≧ 1 a measuring point data record sheet in the database table.
7. according to claim 6 or 5 described forwarding data system between system databases, it is characterized in that comprising in the described site definitions table table name and claim field, write down the title of corresponding source data record sheet, one writing time the field name field, corresponding source data record sheet writing time field title, an increment serial number field name field, the title of the increment serial number field of corresponding source data record sheet.
8. according to claim 6 or 5 described forwarding data system between system databases, it is characterized in that comprising in the described site definitions table table name and claim field, write down the title of corresponding source data record sheet, one writing time the field name field, corresponding source data record sheet writing time field title, an increment serial number field name field, the title of the increment serial number field of corresponding source data record sheet.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101931559A (en) * | 2010-09-02 | 2010-12-29 | 上海北塔软件股份有限公司 | Method for demonstrating access traffic flow distribution |
| CN102045366A (en) * | 2011-01-05 | 2011-05-04 | 上海北塔软件股份有限公司 | Method for actively discovering network attacked by viruses |
| CN103049551A (en) * | 2012-12-27 | 2013-04-17 | 福州福大自动化科技有限公司 | Method for automatic association of data points of database in configuration software |
| CN103268099A (en) * | 2013-05-06 | 2013-08-28 | 国家电网公司 | Real-time data collecting method of automatic monitoring system during discharging of pollutant source of coal-fired power plant |
| CN103997487A (en) * | 2014-05-04 | 2014-08-20 | 绿网天下(福建)网络科技有限公司 | Safe network-surfing isolation method based on browser |
| CN105138390A (en) * | 2015-07-31 | 2015-12-09 | 中国人民解放军海军工程大学 | Real-time data communication system and method applied between process monitoring control system and emulation support system |
| CN105678673A (en) * | 2016-01-11 | 2016-06-15 | 杭州电子科技大学 | Method for calculating and updating level of water-flow situation |
| CN107015540A (en) * | 2017-04-18 | 2017-08-04 | 江苏信息职业技术学院 | A kind of creation data real-time acquisition system based on DCS |
| CN110502584A (en) * | 2019-08-28 | 2019-11-26 | 北京三快在线科技有限公司 | The synchronous method and apparatus of data |
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| CN101931559A (en) * | 2010-09-02 | 2010-12-29 | 上海北塔软件股份有限公司 | Method for demonstrating access traffic flow distribution |
| CN101931559B (en) * | 2010-09-02 | 2013-02-13 | 上海北塔软件股份有限公司 | Method for demonstrating access traffic flow distribution |
| CN102045366A (en) * | 2011-01-05 | 2011-05-04 | 上海北塔软件股份有限公司 | Method for actively discovering network attacked by viruses |
| CN103049551A (en) * | 2012-12-27 | 2013-04-17 | 福州福大自动化科技有限公司 | Method for automatic association of data points of database in configuration software |
| CN103049551B (en) * | 2012-12-27 | 2016-01-20 | 福州福大自动化科技有限公司 | A kind of method of the data point auto-associating of database in configuration software |
| CN103268099B (en) * | 2013-05-06 | 2015-07-01 | 国家电网公司 | Real-time data collecting method of automatic monitoring system during discharging of pollutant source of coal-fired power plant |
| CN103268099A (en) * | 2013-05-06 | 2013-08-28 | 国家电网公司 | Real-time data collecting method of automatic monitoring system during discharging of pollutant source of coal-fired power plant |
| CN103997487A (en) * | 2014-05-04 | 2014-08-20 | 绿网天下(福建)网络科技有限公司 | Safe network-surfing isolation method based on browser |
| CN105138390A (en) * | 2015-07-31 | 2015-12-09 | 中国人民解放军海军工程大学 | Real-time data communication system and method applied between process monitoring control system and emulation support system |
| CN105138390B (en) * | 2015-07-31 | 2018-11-30 | 中国人民解放军海军工程大学 | Apply the real-time data communication system and method between process monitoring control system and simulation support svstem |
| CN105678673A (en) * | 2016-01-11 | 2016-06-15 | 杭州电子科技大学 | Method for calculating and updating level of water-flow situation |
| CN107015540A (en) * | 2017-04-18 | 2017-08-04 | 江苏信息职业技术学院 | A kind of creation data real-time acquisition system based on DCS |
| CN110502584A (en) * | 2019-08-28 | 2019-11-26 | 北京三快在线科技有限公司 | The synchronous method and apparatus of data |
| CN110502584B (en) * | 2019-08-28 | 2021-09-28 | 北京三快在线科技有限公司 | Data synchronization method and device |
| CN112069166A (en) * | 2020-07-09 | 2020-12-11 | 浙江南都电源动力股份有限公司 | Power station equipment data acquisition method and system |
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