CN103441850B - Wireless security router, power distribution network data transmission system and method for work thereof - Google Patents
Wireless security router, power distribution network data transmission system and method for work thereof Download PDFInfo
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- CN103441850B CN103441850B CN201310368902.6A CN201310368902A CN103441850B CN 103441850 B CN103441850 B CN 103441850B CN 201310368902 A CN201310368902 A CN 201310368902A CN 103441850 B CN103441850 B CN 103441850B
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- wireless security
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
-
- 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/124—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wired telecommunication networks or data transmission busses
-
- 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission
-
- 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/20—Information technology specific aspects, e.g. CAD, simulation, modelling, system security
Abstract
The invention provides a kind of wireless security router, power distribution network data transmission system and method for work thereof.Wireless security router comprises control mainboard, casing, and GPRS/3G wireless module, described control mainboard is provided with memory chip and safe SOC, and described wireless security router is provided with serial ports, USB interface, Ethernet interface.Power distribution network data transmission system comprises wireless security router, power supply administration's front end processor, distribution terminal.Described wireless security router connects distribution terminal by Ethernet interface or serial ports, accessed mobile interchange private network by GPRS/3G wireless module and with power supply administration's front end processor wireless connections.The present invention uses the safe SOC with national commercial cipher algorithm to realize wireless GPRS/3G router, the national commercial cipher algorithm coprocessor utilizing safe S0C chip carries out data encrypting and deciphering process to power distribution network data, achieves the data safety of power distribution network with relatively low cost.
Description
Technical field
The present invention is applicable to power distribution network and wireless industrial security fields, relates to wireless security router, distribution network data
Communication system and method for work thereof.
Background technology
10KV transformer station mainly applied by power distribution network, is directly connected to citizen's Electrical Safety, and prevailing transmission is deployed in power supply administration
Distribution dispatching and monitoring and data collecting system and be deployed in scene distribution terminal between communication data, including data acquisition
The data such as collection, warning, Stateful Inspection, remote control.Described data are all advised according to IEC60870-5-101 or IEC60870-5-104
About require to be packaged.Power distribution network typically uses industrial optical fiber looped network or GPRS/3G wireless private network as data transmission channel.Cause
Build optical fiber ring network excessive cycle, and limited by urban geography, cost puts into the factor such as the biggest is affected, power supply enterprise mostly selects
Select employing GPRS/3G wireless private network as power distribution network key data transmission network.Power distribution network data belong to critical data, if number
According to being tampered or forging, will cause city that large area blackout occurs, have a strong impact on people's life and economic development.Particularly
Using GPRS/3G wireless network transmissions data, its data are easy to be held as a hostage, distort and forge.
Clearly propose power distribution network during within 2011, Electricity Monitoring Commission specifies and need to use the safety of encryption technology protection transmission data.State
Family's grid company clear stipulaties installs the encrypted card with national commercial cipher algorithm at power supply administration's front end processor, at distribution terminal
Running country's soft algorithm of commercial cipher, the method being extended 101/104 stipulations has protected the safety of power distribution network transmission data.
Power distribution network data belong to real-time monitoring data, have higher requirements the real-time of its data.Distribution terminal is typically adopted
With the CPU of low calculated performance, country's commercial cipher algorithm belongs to high-intensity high-density and calculates, causes distribution terminal to process power supply administration
Front end processor issues the real-time of the data of encrypted process cannot arrive the requirement of its business itself.Simultaneously need to on-the-spot distribution
Terminal carries out software upgrading and has met the requirement of safety, and its upgrading and maintenance workload are huge.
Summary of the invention
For solving the problems referred to above, the invention provides a kind of wireless security router, power distribution network data transmission system and
Method of work.
Wireless security router, comprises control mainboard, casing, also comprises GPRS/3G wireless module, on described control mainboard
Be provided with memory chip and safe SOC, described safe SOC be internally integrated national commercial cipher algorithm coprocessor,
32 RISC CPU；Described GPRS/3G wireless module and memory chip are connected with safe SOC, and described wireless security route
Device is additionally provided with serial ports and/or USB interface.Described wireless security router is additionally provided with Ethernet interface.Described safe SOC connects
Ethernet interface, serial ports and/or USB interface, described GPRS/3G wireless module connects serial ports or USB interface.
Power distribution network data transmission system, it is characterised in that wireless security router, power supply administration described in comprising are preposition
Machine, distribution terminal, described wireless security router connects distribution terminal, wireless by GPRS/3G by Ethernet interface or serial ports
Module access mobile Internet and with power supply administration's front end processor wireless connections.
The method of work of above-mentioned power distribution network data transmission system is:
It is as follows to the flow process of distribution terminal that power supply administration's front end processor issues downlink data:
Step 1: downlink data selectivity is signed again and is sent to wireless security route after symmetric cryptography by power supply administration's front end processor
Device；
Step 2: according to the bebinning character 16H of downlink data, wireless security router judges that whether this downlink data is through testing
Signed certificate name symmetric cryptography again processes；
Step 3: wireless security router is decrypted posteriority signed certificate name and processes the downlink data of bebinning character 16H, its
Its data is not carried out；
Step 4: wireless security router is sent to distribution terminal downlink data by Ethernet interface or serial ports.
Distribution terminal reporting uplink data are as follows to the flow process of power supply administration's front end processor:
Step 1: distribution terminal reporting uplink data are to wireless security router；
Step 2: wireless security router judges the protocol type that distribution terminal carries out data transmission；
Step 3: as 104 stipulations, then wireless security router carries out network address translation IP packet, as 101
Stipulations, then wireless security router is set up TCP with power supply administration front end processor and is connected, and upstream data is encapsulated as Transmission Control Protocol load；
Step 4: as 101 stipulations, whether wireless security router is that remote signalling, telemetry determine and be according to upstream data
No upstream data is carried out Reseal；
Step 5: it is asymmetric whether wireless security router according to upstream data is that remote signalling, telemetry determine whether to carry out
Encryption；
Step 6: if desired for carrying out asymmetric encryption process, then carry out asymmetric encryption, do not carry out；
Step 7: upstream data uploads to power supply administration's front end processor by mobile Internet.
The outstanding advantages of the present invention is: use have the safe SOC of national commercial cipher algorithm realize wireless GPRS/
3G router, utilizes the national commercial cipher algorithm coprocessor of safe S0C chip that power distribution network data are met " mesolow
Distribution automation system security protection replenish regulations " data encrypting and deciphering process, it is achieved its data safety.
Accompanying drawing explanation
Fig. 1 is wireless security router hardware implementation and the schematic diagram of place distribution system thereof.
Fig. 2 is the functional module signal of the wireless security router using Ethernet interface to carry out data transmission with distribution terminal
Figure.
Fig. 3 is the functional module signal using the wireless security router carried out data transmission with serial ports and distribution terminal
Figure.
Fig. 4 is the wireless security router using the present invention, and power supply administration's front end processor issues downlink data to distribution terminal
Flow chart of steps.
Fig. 5 is the wireless security router using the present invention, and distribution terminal reporting uplink data are to power supply administration's front end processor
Flow chart of steps.
Detailed description of the invention
The present invention is described in further detail below in conjunction with the accompanying drawings.
First wireless security router hardware structure is illustrated.
It is illustrated in figure 1 hardware implementation mode schematic diagram.This wireless security router, comprise control mainboard, casing,
GPRS/3G wireless module, described control mainboard is provided with memory chip and safe SOC, inside described safe SOC
It is integrated with country commercial cipher algorithm coprocessor, 32 RISC CPU；Described GPRS/3G wireless module and memory chip and peace
Full SOC connects, and described wireless security router is additionally provided with serial ports and/or USB interface.Described wireless security router also sets
There is Ethernet interface.Described safe SOC connects Ethernet interface, serial ports and/or USB interface, described GPRS/3G at casing internal
Wireless module connects serial ports or USB interface.
The safe SoC chip of commercial cipher algorithm realizes wireless GPRS/3G router, and commercial cipher algorithm association of country processes
Power distribution network data are met at the data encrypting and deciphering of " low and medium voltage distribution network automated system security protection supplementary provisions " by device
Reason, it is achieved its data safety.
Above-mentioned wireless security router may be used in the data transmission procedure of power distribution network, forms a distribution network data
Communication system, as shown in Figure 1.This system comprises above-mentioned wireless security router, power supply administration's front end processor and is dispersed in joining everywhere
Electric terminals, described wireless security router is connected distribution terminal by Ethernet interface or serial ports, is connect by GPRS/3G wireless module
Enter mobile Internet and carry out radio communication with power supply administration's front end processor.
Specifically, the most described wireless security router passes through the distribution terminal phase of serial ports or ethernet link and rear end
Even, receive distribution terminal and upload data.Access mobile Internet by GPRS/3G wireless module, receive the number that power supply administration issues
According to.
Below the functional module of wireless security router is illustrated.
Described wireless security router is different from distribution terminal connected mode and be divided into different functional modules according to it, as
Fig. 2, shown in 3.
Fig. 2 is the functional module for the wireless security router using Ethernet interface to carry out data transmission with distribution terminal
Schematic diagram.
3G/GPRS dial module is responsible for PPP dialing, makes wireless security router access mobile Internet.
The IP message that NAT address conversion module is responsible for uploading distribution terminal is converted to the public network address of mobile Internet.
Cryptographic algorithm engine modules is responsible for the national commercial cipher algorithm coprocessor called within safe SoC chip, for
Conventions data secure processing module provides cryptographic algorithm service.
Conventions data secure processing module is responsible for being identified and carry out corresponding data adding solution to 101/104 conventions data
Close and checking signature processes.
Interface route configuration module is for realizing the related hardware configuration routeing each interface.
Fig. 3 is the functional schematic using the wireless security router carried out data transmission with serial ports and distribution terminal.
TCP Connection Service module is responsible for and sets up TCP between power supply administration front end processor and be connected, and 101 conventions data are carried out
TCP encapsulation has sent to power supply administration's front end processor.
The function of remaining module is identical with to the description of Fig. 2.
Below the working method of said system is described in detail.
During use, the wireless security router of the present invention is located between distribution terminal and wireless network.Wireless security
Router according to the characteristic half section of its 101/104 conventions data the need of carrying out corresponding asymmetric encryption or deciphering
Rear sign test processes, it is ensured that the data transmitted in the wireless network are 101/104 safe conventions data.Below to its specific works
Flow process is described in detail..
Using the wireless security router of the present invention, the downlink data that power supply administration's front end processor issues is sent to distribution terminal
Steps flow chart is as shown in Figure 4.
Downlink data selectivity is signed again and is sent to wireless security router after symmetric cryptography by S1: power supply administration's front end processor.
Particularly as follows: the downlink data that power supply administration's front end processor issues is according to " low and medium voltage distribution network automated system security protection
Supplementary provisions " require to be handed down to be deployed in by wireless network after the signature symmetric cryptography again of front end processor encrypting module processes
On-the-spot wireless security router.
Whether S2: wireless security router is that 16H determines this downlink data whether need according to the bebinning character of downlink data
It is decrypted and verifies that signature processes again.
Verify that signature processes again if desired for deciphering, then S3 is:
S3: call stipulations secure processing module and downlink data is decrypted verifies that signature processes again,
Particularly as follows: the national commercial cipher algorithm coprocessor that stipulations secure processing module calls safe SoC chip is carried out
The symmetry algorithm of downlink data is deciphered SM2 proof of algorithm signature again and is processed.Symmetry algorithm can be SM1 or SM4 algorithm.
Processing as need not signature, the most not carrying out S3, directly carrying out S4.
S4: data distributing to rear end distribution terminal.
This step particularly as follows:
If wireless security router is connected with distribution terminal by Ethernet interface, wireless security router is only to lower line number
Distribution terminal can be sent to by Ethernet according to after carrying out NAT address conversion (network address translation).
If wireless security router is connected with distribution terminal by serial ports, wireless security router calls TCP connection mode
Block restores original 101 conventions data, and is sent to rear end distribution terminal by serial ports.
Use the wireless security router of the present invention, the step of distribution terminal reporting uplink data to the front end processor of power supply administration
Flow process is as shown in Figure 5.
S1: distribution terminal reporting uplink data are to wireless security router.
S2: wireless security router judges protocol type.
If distribution terminal is carried out data transmission by Ethernet interface, then run 104 stipulations agreements；If distribution terminal leads to
Cross serial ports to carry out data transmission, then run 101 stipulations agreements.
If distribution terminal is connected with wireless security router by Ethernet interface, then S3～S5 is:
S3: call NAT address conversion module and carry out address conversion.
S4: be whether that remote signalling, telemetry determine whether to carry out asymmetric encryption process according to the data of 104 stipulations.
S5: need, calls stipulations secure processing module and realizes the encryption to upstream data.
If distribution terminal is connected with wireless security router by serial ports, then S3～S5 is:
S3: wireless security router calls TCP link block and sets up TCP with power supply administration front end processor and be connected, receive
Data are as TCP load data.
S4: be whether that remote signalling, telemetry determine whether according to " low and medium voltage distribution network is automatic according to the data of 101 stipulations
Change security of system protection supplementary provisions " upstream data is carried out Reseal, if need to carry out asymmetric encryption process.
S5: need then the upstream data of new encapsulation format to be carried out asymmetric encryption process.
In this step, it is that the national commercial cipher algorithm coprocessor calling safe SoC chip carries out SM2 calculation to upstream data
Method encryption.
S6: upstream data uploads to main website of power supply administration by wireless channel.
Concrete data frame format is:
The outstanding advantages of the present invention is: use have the safe SOC of national commercial cipher algorithm realize wireless GPRS/
3G router, utilizes the national commercial cipher algorithm coprocessor of safe S0C chip that power distribution network data are met " mesolow
Distribution automation system security protection replenish regulations " data encrypting and deciphering process, realize its data safety with relatively low cost.
Claims (6)
1. a method of work for power distribution network data transmission system, described power distribution network data transmission system, comprise wireless security road
By device, power supply administration's front end processor, distribution terminal, described wireless security router by Ethernet interface or serial ports connect distribution terminal,
By GPRS/3G wireless module access mobile Internet with power supply administration's front end processor wireless connections；Described secure router, comprises
Control mainboard, casing, it is characterised in that also comprising GPRS/3G wireless module, described control mainboard is provided with memory chip and peace
Full SOC, described safe SOC has been internally integrated national commercial cipher algorithm coprocessor, 32 RISC CPU；Institute
State GPRS/3G wireless module and memory chip to be connected with safe SOC, described wireless security router be additionally provided with serial ports and/
Or USB interface, it is characterised by,
It is as follows to the flow process of distribution terminal that power supply administration's front end processor issues downlink data:
Step 1: power supply administration's front end processor sends downlink data to wireless security router by mobile Internet；
Step 2: according to the bebinning character 16H of downlink data, wireless security router judges that this downlink data is whether after signature
Symmetric cryptography processes；
Step 3: wireless security router is decrypted posteriority signed certificate name and processes the downlink data of bebinning character 16H, under other
Row data are not decrypted the operation that posteriority signed certificate name processes；
Step 4: downlink data is sent to distribution terminal by Ethernet interface or serial ports；
Distribution terminal reporting uplink data are as follows to the flow process of power supply administration's front end processor:
Step 1: distribution terminal reporting uplink data are to wireless security router；
Step 2: wireless security router judges the protocol type that distribution terminal carries out data transmission；
Step 3: as 104 stipulations, then wireless security router carries out network address translation IP packet, as 101 stipulations,
Then wireless security router is set up TCP with power supply administration front end processor and is connected, and upstream data is encapsulated as Transmission Control Protocol load；
Step 4: as 101 stipulations, wireless security router according to upstream data whether be remote signalling, that telemetry determines whether is right
Upstream data carries out Reseal；
Step 5: whether wireless security router is that remote signalling, telemetry determine whether to carry out asymmetric encryption according to upstream data
Process；
Step 6: if desired for carrying out asymmetric encryption process, then carry out asymmetric encryption, do not carry out；
Step 7: upstream data uploads to power supply administration's front end processor by mobile Internet.
2. state the method for work of power distribution network data transmission system such as claim 1, it is characterised in that give under power supply administration's front end processor
Row data are in the step 4 of the flow process of distribution terminal, before downlink data is sent to distribution terminal by Ethernet interface, and wireless security
Router carries out network address translation to downlink data；Before downlink data is sent to distribution terminal by serial ports, wireless security road
Original 101 conventions data are restored by device.
3. state the method for work of power distribution network data transmission system such as claim 1, it is characterised in that distribution terminal reporting uplink number
In step 2 according to the flow process to power supply administration's front end processor, if distribution terminal is carried out data transmission by serial ports, then run 101 rule
About agreement；If distribution terminal is carried out data transmission by Ethernet interface, then run 104 stipulations agreements.
4. the method for work of power distribution network data transmission system as described in claim 1 or 2 or 3, it is characterised in that power supply administration is preposition
Machine issues downlink data in the step 3 of the flow process of distribution terminal, utilizes commercial cipher algorithm association of safe SoC chip country to process
Device carry out downlink data symmetry algorithm deciphering after carry out SM2 proof of algorithm signature process, symmetry algorithm according to can be SM1 or
SM4 algorithm.
5. the method for work of power distribution network data transmission system as described in claim 1 or 2 or 3, it is characterised in that on distribution terminal
Report upstream data in the step 6 of the flow process of power supply administration's front end processor, calls at the national commercial cipher algorithm association of safe SoC chip
Reason device carries out SM2 algorithm for encryption process to upstream data.
6. the method for work of power distribution network data transmission system as claimed in claim 1, it is characterised in that described safe SOC core
Sheet connects Ethernet interface, serial ports and/or USB interface, and described GPRS/3G wireless module connects serial ports or USB interface.
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| CN201310368902.6A CN103441850B (en) | 2013-08-22 | 2013-08-22 | Wireless security router, power distribution network data transmission system and method for work thereof |
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| CN201310368902.6A CN103441850B (en) | 2013-08-22 | 2013-08-22 | Wireless security router, power distribution network data transmission system and method for work thereof |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105577555A (en) * | 2016-01-12 | 2016-05-11 | 左冠高科技术有限公司 | Wireless routing equipment and wireless networking method |
| CN106254397A (en) * | 2016-10-17 | 2016-12-21 | 北京国泰网信科技有限公司 | Special line encrypted authentication system |
| CN106603499A (en) * | 2016-11-18 | 2017-04-26 | 国网甘肃省电力公司电力科学研究院 | Safety communication reconstruction method and system for power distribution terminal |
| CN106790089A (en) * | 2016-12-23 | 2017-05-31 | 厦门亿力天龙科技有限公司 | A kind of distribution low-voltage equipment information security certification transmission terminal and its implementation |
| CN107770032A (en) * | 2017-11-10 | 2018-03-06 | 中国南方电网有限责任公司 | The communication system and its means of communication of distribution terminal |
| CN108055316B (en) * | 2017-12-08 | 2021-06-01 | 深圳市田言智能科技有限公司 | Intelligent router start-stop system based on Internet of things |
| CN108156164B (en) * | 2017-12-28 | 2020-12-29 | 国网信息通信产业集团有限公司 | Method for increasing PPP service for electric power wireless private network terminal |
| CN114244417A (en) * | 2021-12-20 | 2022-03-25 | 广东电网有限责任公司 | DTU signal supplement relay device of underground power distribution room |
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| CN203434997U (en) * | 2013-08-22 | 2014-02-12 | 成都卫士通信息产业股份有限公司 | Wireless secure router and power-distribution-network data transmission system |
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| US8711875B2 (en) * | 2011-09-29 | 2014-04-29 | Intel Corporation | Aggregating completion messages in a sideband interface |
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| CN101777792A (en) * | 2009-12-24 | 2010-07-14 | 深圳先进技术研究院 | Safety communication system and method of electric network |
| CN202889399U (en) * | 2012-10-22 | 2013-04-17 | 上海照恒科技有限公司 | Information acquisition system |
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