CN101398877A - Data uploading extender card device embedded in computer - Google Patents
Data uploading extender card device embedded in computer Download PDFInfo
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- CN101398877A CN101398877A CNA2008102268461A CN200810226846A CN101398877A CN 101398877 A CN101398877 A CN 101398877A CN A2008102268461 A CNA2008102268461 A CN A2008102268461A CN 200810226846 A CN200810226846 A CN 200810226846A CN 101398877 A CN101398877 A CN 101398877A
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Abstract
The invention relates to a data uploading transmission expansion card device internally embedded in a computer. The device is internally arranged in a target computer; the device consists of a unidirectional data transmission module and a computer expansion slot interface unit; the unidirectional data transmission module consists of a data channel unit, a data input interface unit, a control unit and a data output unit, a memorizing unit and a read-only memorizing unit. The device is the device which unidirectionally transmits the data on the external memorizer of the computer into the computer; the device is provided with an exclusive identifying number; the non-volatile memorizing unit is adopted for memorizing the history operation records of the device, thus improving the secrecy management performance of the device. Simultaneously, the data channel unit and a high-speed expansion slot interface are adopted by the device, thus greatly improving the transmission speed of data.
Description
Technical field
The present invention relates to a kind of data uploading extender card device embedded in computer, it belongs to data security guard technology field.
Background technology
Because national information security needs, army, institutional settings and concerning security matters enterprise all face the Low Security Level equipment that how to guarantee (comprising Low Security Level computing machine or Low Security Level memory bank, such as USB flash disk, portable hard drive, CF card, digital camera, mobile phone etc.) and transmit file data safely to High Security Level equipment (comprising High Security Level computing machine or High Security Level store storage body etc.).So-called safety must guarantee exactly in carrying out the copy function process of data, data can only be unidirectional from Low Security Level equipment to High Security Level equipment, and can the not divulge a secret equipment of Low Security Level of the confidential data in the High Security Level equipment.Present normally used method is the equipment of the isolated different security level of physics, or manually adopt portable memory apparatus (such as CF card, memory stick, USB flash disk, disk cartridge etc.) copies data from the computer equipment of Low Security Level, again with the copying data on the portable memory apparatus in High Security Level equipment.This method not only efficient is low, and, if in the portable set if any similar trojan horse, perhaps the human error will cause the leakage of confidential data.A kind of system that addresses the above problem has been proposed in publication CN200710129797.5, but the data one-way transmission apparatus that this system relates to is to be placed on computing machine, can not built-in computing machine, therefore this device powers on when using at every turn, the user must be connected into two memory devices two interfaces of this data transmission device by hand, user for frequent this device of use can feel loaded down with trivial details, for the limited user in space or dislike user, can wish that all peripheral hardwares can be built-in in addition at the computing machine external device.In addition, the data one-way transmission apparatus that is placed on computing machine must connect an interface of computing machine, and these interfaces all are bi-directional data interfaces, therefore the user can illegally skip the data one-way transmission apparatus, directly bank device is connected with the data-interface of relating computer and carries out copies data, therefore still there is certain risk in this external data transmission device for relating computer.It as Fig. 4 the structure of the one-way data transmitting device that in publication CN200710129797.5, proposes, processor wherein need be finished the function of all logic controls of internal system, all data reads, all data processing and data output, cause system can only be in a kind of duty of serial, therefore require very high to performance of processors, improved the cost of system, also limited simultaneously the data rate of system, particularly when for example transmitting mass data files such as image, video, the user waits for that the time of data transmission can be very long.In addition, the system that this patent relates to does not carry out safety record to the crucial historical information in the one-way data transmission operating process, therefore can't provide strong evidence to the verification work after the secret leaking incident, is not easy to security management work.
Summary of the invention
The present invention is directed to the deficiency that exists in the existing secrecy-involved apparatus technology for safely applying, particularly a kind of data uploading extender card device embedded in computer has been proposed at the technical deficiency among the publication CN200710129797.5, the External memory equipment that the relating computer of this device has been installed in assurance can only unidirectional copies data advance computing machine by this device, guaranteed in the copying data process safety of data in the computing machine, by control or physical restriction to other bi-directional data input and output interface of relating computer, can prevent that the user from illegally skipping the data one-way transmission apparatus, directly pass through the bi-directional data input and output interface copies data of relating computer, consider that from preventing the angle that subjectivity is stolen secret information the device that the present invention proposes is more safer than the relating computer that uses external data one-way transmission apparatus.In addition, the device that the present invention relates to has adopted data channel unit and the interior high-speed data expansion slot interface of computing machine at a high speed to carry out the transmission of data, has improved the data rate of data transmission device greatly, has also reduced cost simultaneously.Further, the inner historical record that adopts non-volatile memory cells to store this device operation of the device that the present invention relates to, and this device also has unique identifier (ID number), therefore provide a kind of strong evidence to the verification work after the secret leaking incident, be very easy to security management work.
The invention is characterized in:
A kind of data uploading extender card device embedded in computer, described device comprises:
Data sheet is to transport module, is used for obtaining file data from memory bank or computing machine that needs carry out beyond the object computer of data protection, and this document data is one-way transmitted to the expansion slot interface of object computer;
The expanded slot of computer interface unit, be connected in data individual event transport module, in order at data sheet under the control of transport module, obtain file data from data sheet to transport module, finish and the Control on Communication that need carry out the object computer expansion slot interface of data protection, and the output file data are to this object computer;
Described data sheet comprises to transport module:
Storage unit is a kind of nonvolatile memory;
Read-only memory unit is a kind of ROM (read-only memory);
Control module, be connected in storage unit and read-only memory unit, the duty that is used for all other unit in the control device, control computer expansion slot interface unit and Data Input Interface unit obtain data file information and the temporal information that will transmit, and as the historical data write storage unit, read unique identifier of readout device historical data and the read-only memory unit from storage unit, output to the data channel unit interface;
The Data Input Interface unit is connected in control module, reads in file data in order to the interface communication control of carrying out bank device beyond the object computer of data protection or computer equipment with needs, and exports the data channel unit to reading in file data;
The data channel unit, be connected in Data Input Interface unit and control module, reception is from the output data of Data Input Interface unit and receive from the historical data of control module output and unique identifier of device, and these data are one-way transmitted to the data output unit;
The data output unit is connected in data channel unit, control module, expanded slot of computer interface unit, in order to the data transmission that reads from the data channel unit to the expanded slot of computer interface unit.
Described read-only memory unit has been stored unique identifier of device.
Described data channel unit comprises,
The Data Receiving passage is used to receive from the data of Data Input Interface unit and historical data and the identification signal of exporting from control module, and data that receive are write the data buffer;
The data buffer is connected in the Data Receiving passage, is used to transmit the cushioning medium storage of data;
The data sendaisle is connected in Data Receiving passage and data buffer, in order to from the data buffer reading of data, and these data is exported to the data output unit.
Described data buffer has the memory module of carrying out read and write data manipulation ability simultaneously.
Described data channel unit can adopt FPGA or adopt FPGA+ static random storage chip to constitute.
Described control module adopts the processor of low performance or FPGA to realize.
Described data sheet adopts the SOC technology to realize to transport module and expanded slot of computer interface unit..
The present invention has following good effect:
1) data uploading extender card device embedded in computer that the present invention relates to is a kind of package card of built-in computing machine, solved and be not suitable for the data one-way transmission apparatus and be placed on the outer situation of computing machine, simultaneously, by control or physical restriction to other input and output interface of relating computer, can prevent that the user from illegally skipping the data one-way transmission apparatus, directly pass through the bi-directional data interface copies data of relating computer, consider that from preventing the angle that subjectivity is stolen secret information the device that the present invention proposes is more safer than the relating computer that uses external data one-way transmission apparatus.
2) adopted the high-speed data expansion slot interface in a kind of high-speed data channel unit and the computing machine to carry out the transmission of data in the data uploading extender card device embedded in computer that the present invention relates to, can improve the data rate of device, and reduce the cost of data transmission device.
3) the inner historical record that adopts non-volatile memory cells to store this device operation of the data uploading extender card device embedded in computer that the present invention relates to, and this device also has unique identifier, therefore provide a kind of strong evidence to the verification work after the secret leaking incident, be very easy to security management work.
Description of drawings
Fig. 1. system schematic of the present invention.
Fig. 2. the synoptic diagram of working method one.
Fig. 3. the synoptic diagram of working method two.
Fig. 4. data unidirectional transmission unit structure of the prior art
Fig. 5. the data uploading extender card device embedded in computer structure.
Fig. 6. the hardware configuration of data channel unit.
Embodiment
Fig. 1 is the simple signal that will relate to system, and wherein " data uploading extender card device embedded in computer " is the hardware core device that the present invention will realize.This device mainly contains two interfaces, one is that the A mouth is Data Input Interface (this interface can adopt com port, USB interface, ide interface, parallel port, Ethernet interface or other storage device interface etc.), be used for connecting the memory device (this equipment can be USB flash disk, portable hard drive, CF card, SD card, the mobile phone of being with memory bank, digital camera, computing machine or the like) of Low Security Level, and read in data, and export the data channel unit to reading in data with the control of the interface communication of this memory device; Another is that the B mouth is that (this interface can be the interface that links to each other with expansion slot in the computing machine to data output interface, such as pci interface, PCI-Express interface, AGP interface, ISA interface, EISA interface, CNR interface, ACR interface, WI-FI interface, VXB interface and pcmcia interface etc.), be used for the Control on Communication of expanded slot of computer interface and output data to computing machine.When work, the data of the Low Security Level memory device that the A mouth connects are read in by the A mouth of data uploading extender card device embedded in computer, and then by the B mouth data of reading in are outputed to relating computer.For the confidential data in the computing machine that guarantees the connection of B mouth can not leak in the Low Security Level equipment that is connected with the A mouth, the data transfer direction of the data uploading extender card device embedded in computer that the present invention relates to is unidirectional, be that data can only be input to the output of B mouth from the A mouth, do not allow data transmission in the design, definitely guaranteed safety of data from the B mouth to the A mouth.
According to the function that will realize, system provides two kinds of working methods:
1) the unidirectional copies data of Low Security Level memory bank is to the working method of High Security Level computing machine, as shown in Figure 2.Operating process is as follows: operating personnel connect the High Security Level computing machine to the B mouth of data transmission device, this interface can be com port, parallel port, USB, network interface, then memory banks such as Low Security Level portable hard drive or USB flash disk are connected the A mouth of data transmission device, the last operation personnel realize the data of safe copy Low Security Level portable hard drive or USB flash disk by the special software of installing of communicating by letter with data transmission device on the High Security Level computing machine.
2) this machine data of the unidirectional copy of Low Security Level computing machine is to the working method of High Security Level computing machine, and as shown in Figure 3, wherein data uploading extender card device embedded in computer is installed in the High Security Level computing machine.Operating process is as follows: operating personnel connect the High Security Level computing machine to the B mouth of data transmission device, then data transmission device A mouth is connected the Low Security Level computing machine, operating personnel move special software and are in data receiving state in the High Security Level computing machine, and then the special software by design selects the data that will copy transmission to get final product on the Low Security Level computing machine.
The embodiment of apparatus of the present invention adopts structure as shown in Figure 5, this device mainly is made up of to transport module expanded slot of computer interface unit and data sheet, data sheet obtains file data to computing machine (being the High Security Level computing machine) relative Low Security Level memory bank or the computing machine in addition that transport module is used for carrying out from needs data protection, and this document data are one-way transmitted to the expanded slot of computer interface unit, export the High Security Level expanded slot of computer interface that need carry out data protection at last to; Data sheet is finished the Low Security Level memory bank or the computing machine that are used for carrying out from needs beyond the High Security Level computing machine of data protection to transport module and is obtained file data; and these data are one-way transmitted to the expansion slot interface that to carry out the computing machine of data protection; it comprises the Data Input Interface unit; the data channel unit; the data output unit; storage unit, read-only memory unit and control module.In this device, control module is the control core of total system, the duty that is used for all other unit in the control device, the Control on Communication with the expanded slot of computer interface (is finished in control computer expansion slot interface unit, obtaining of simple file attribute information and temporal information, and obtain file data to transport module from data sheet, and this document data are exported to computing machine) obtain the data file information that will transmit and the current time information of computing machine from computing machine, and write storage unit is as historical data, read the unique ID number of reading this device historical data and the read-only memory unit from storage unit, in the time will from the data uploading extender card device in being embedded in the High Security Level computing machine, reading historical data, control module can be read historical data and read this device from read-only memory unit from storage unit unique ID number, and export computing machine to by the expanded slot of computer interface unit.
When the A of data uploading extender card device embedded in computer mouth connect be the memory bank of look-alike disk the time, be under the situation of working method one, (this unit communication control processor and the file data finished with Low Security Level memory bank interface read in the control module of this device by the control data input interface unit, and output to the data channel unit reading in data) obtain its logical partition information from the Low Security Level memory bank, be transferred to data output unit and expanded slot of computer interface unit by the control data channel unit then, output to the High Security Level computing machine (computing machine can carry out obtaining of file directory and file-related information to interested logical partition then) that the B mouth is connected again, then control module control computer expansion slot interface unit receives the catalogue of obtaining the Low Security Level memory bank sent from the High Security Level computing machine and the order of fileinfo, and obtaining this appointed information from the memory bank of A mouth according to this order control data input interface unit, control module is transferred to the High Security Level computing machine to the information of obtaining by the expanded slot of computer interface unit more then.Then, the High Security Level computing machine is according to the catalogue and the fileinfo that read, file in the Low Security Level memory bank that appointment will be transmitted, and specifying the fileinfo (filename that will transmit, the document creation time, information such as file size) and the current time information of computing machine send to the expanded slot of computer interface unit, control module obtains this information from the expanded slot of computer interface unit, and this document information and computing machine current information of time write storage unit (nonvolatile memory) as historical data, last control module obtains the specified file data by the control data input interface unit from the Low Security Level memory bank of A mouth, and control this data transmission to the data channel unit, data output interface unit and expanded slot of computer interface unit output to the High Security Level computing machine that the B mouth is connected at last.The transmission course of each file is back and forth carried out successively, up to the All Files end of transmission.
The structure of data channel unit wherein as shown in Figure 6, it comprises Data Receiving passage, data buffer and data sendaisle.Its effect is the output data that is used for receiving from the Data Input Interface unit in the data file transmission course, and this data sheet to exporting the data output unit to.When beginning to carry out data transmission, control module can send the order that begins to transmit data to the data channel unit, Data Receiving passage and data sendaisle all are in the Data Receiving ready state, the data sendaisle is to Data Receiving passage control signal ready for data simultaneously, after the Data Receiving passage is received this signal, again to Data Input Interface unit control signal ready for data, after receiving data, the Data Receiving passage then writes data buffer area, from data buffer area, read these data again by the data sendaisle and output to the data output interface unit, finish the transmission work of data.In whole data transmission procedure, when if the data transmission rate of this device and intercomputer is lower than the read rate of data in magnetic disk, the full situation of data buffer area can appear, therefore the expanded slot of computer interface unit can send not ready state control signal to the data output unit, the data output unit transmits this signal to the data sendaisle, the data sendaisle can send the control signal that not ready state control signal suspends data transmission to the Data Receiving passage then, the Data Receiving passage sends the data transmission sus-pension control signal to control module and Data Input Interface unit again, time-out is from the disk reading of data, prevent that factor from writing the loss of data that completely causes according to buffer zone, consider that the data transmission rate of present computer interface generally will be higher than the actual conditions of the data transmission rate of disk interface (because the reading rate of data in magnetic disk will be lower than the flank speed of computer interface), only can be because the non real-time of operating system can cause computer interface speed to be lower than the reading rate of disk once in a while, consider the factor of cost simultaneously, the present embodiment preferably data buffer area in the data channel unit is arranged on the 64K byte, and has the operating function of read and write simultaneously, therefore can realize data channel unit reading in and output function data simultaneously, transmitting device has been realized transmitting data to computing machine simultaneously in the process of reading disk data like this, has improved the transmission speed of data.Therefore the present invention's data transmission procedure of proposing data transmission device can not occur as shown in Figure 4 because the data rate that the processing power of processor causes inadequately descends, require also not high to performance of processors, the hardware configuration of the data channel unit that adopts, and its message transmission rate can adopt the uniprocessor structure far above shown in Figure 4.The table tennis read-write memory that the SRAM by two same 32K sizes that present embodiment preferably adopts forms, this buffer area also can be to adopt two-port RAM to form certainly, or other type has the storage medium of the function of reading while write.
Each data uploading extender card device embedded in computer before dispatching from the factory to having write a unique ID identifier in the read-only read-only memory unit, present embodiment preferably this ID identifier is made up of 32 bits, can guarantee the unique correspondence of this device and user energy like this, so that to the unified management of device and later censorship and verification work.When this device stored history is downloaded, then computing machine sends the instruction that searches historical data to the expanded slot of computer interface unit of B mouth, after control module obtains instruction by this interface unit, be stored in the read-only memory unit ID number and storage unit in the historical data that satisfies condition read, write the Data Receiving passage of data channel unit, ensuing data transmission procedure and foregoing disk file data transmission procedure are identical, therefore no longer superfluous narration.In order to guarantee the authenticity of historical data, the data of storage unit can not be deleted, when only expiring in the space of storage unit, adopts new historical record to cover the method for old Chinese calendar history data, and the storage space of storage unit is preferably the 1G byte in the present embodiment.
The difference of working method two and working method one is, the Low Security Level memory device that the A mouth of transmitting device connects is a computing machine, at first (this unit communication protocol and the file data finished with the Low Security Level computer interface read in control module control data input interface unit, and output to the data channel unit reading in data) receive from the Low Security Level computing machine and send in the Low Security Level computing machine of transmission appointment data file to the instruction of High Security Level computing machine, this instruction has also comprised the fileinfo (filename that will transmit, the document creation time, information such as file size) and the current time information of computing machine, control module extracts fileinfo and temporal information and write storage unit as historical data from instruction, and the control data input interface unit, data channel unit and data output unit, the expanded slot of computer interface unit is in Data Receiving and transmission state.Last control module obtains the specified file data by the control data input interface unit from the Low Security Level computing machine of A mouth, and control this data transmission to the data channel unit, data output unit, expanded slot of computer interface unit, output at last in the High Security Level computing machine that the B mouth is connected.The transmission course of each file is back and forth carried out successively, up to the All Files end of transmission.
The historical data acquisition process and the working method one of the principle of work of data channel and data transmission device are basic identical, therefore repeat no more.
Two embodiment principles introduction of the above-mentioned data uploading extender card device embedded in computer that the present invention is proposed can be known, the file data transfer of unidirectional of this device is that the data transmission one-way by the data channel unit decides, and has guaranteed that the Low Security Level memory device is in the one-way security in the transmission data procedures of High Security Level computing machine.Wherein the control core unit can adopt processor or FPGA to realize, also can adopt the ASIC design, and the data channel unit can adopt FPGA or adopt FPGA+ static random storage chip to constitute, control module and data channel unit also can adopt SOC (system on chip) designing technique to realize that single-chip is integrated in addition, therefore the data transmission device of the present invention's proposition is compared with prior art shown in Figure 4, device is less demanding to performance of processors, the cost of data transmission device can be reduced, the transmission speed of data can also be improved simultaneously.In addition, by control or physical restriction to other input and output interface of relating computer, can prevent that the user from illegally skipping the data one-way transmission apparatus, the direct bi-directional data interface that carries by relating computer (USB interface for example, network interface, the parallel port, serial ports, infrared interface etc.) carry out copies data, consider from preventing the angle that subjectivity is stolen secret information, the built-in that the present invention proposes is more safer than the relating computer that uses external data one-way transmission apparatus, for example can physically isolate or remove the USB interface that computing machine carries, perhaps make the use of physical restriction USB interface otherwise, just can prevent that the user from illegally inserting USB interface that computing machine carries to the band portable hard drive of USB interface or USB flash disk and carrying out the copy of data and divulging a secret of causing.
The above only is preferred embodiment of the present invention, and in order to restriction the present invention, all equivalent transformation, replacements of doing in technical scheme of the present invention all should not be included within protection scope of the present invention.
Claims (8)
1, a kind of data uploading extender card device embedded in computer is characterized in that, described device places in the object computer, and described device comprises:
Data sheet is to transport module, is used for obtaining file data from memory bank or computing machine that needs carry out beyond the object computer of data protection, and this document data is one-way transmitted to the expansion slot interface of object computer;
The expanded slot of computer interface unit; be connected in data individual event transport module; in order at data sheet under the control of transport module; obtain file data from data sheet to transport module; finish and the Control on Communication that need carry out the object computer expansion slot interface of data protection, and the output file data are to this object computer.
2, a kind of data uploading extender card device embedded in computer as claimed in claim 1 is characterized in that, described data sheet comprises to transport module:
Storage unit is a kind of nonvolatile memory;
Read-only memory unit is a kind of ROM (read-only memory);
Control module, be connected in storage unit and read-only memory unit, the duty that is used for all other unit in the control device, control computer expansion slot interface unit and Data Input Interface unit obtain data file information and the temporal information that will transmit, and as the historical data write storage unit, read unique identifier of readout device historical data and the read-only memory unit from storage unit, output to the data channel unit interface;
The Data Input Interface unit is connected in control module, reads in file data in order to the interface communication control of carrying out bank device beyond the object computer of data protection or computer equipment with needs, and exports the data channel unit to reading in file data;
The data channel unit, be connected in Data Input Interface unit and control module, reception is from the output data of Data Input Interface unit and receive from the historical data of control module output and unique identifier of device, and these data are one-way transmitted to the data output unit;
The data output unit is connected in data channel unit, control module, expanded slot of computer interface unit, in order to the data transmission that reads from the data channel unit to the expanded slot of computer interface unit.
3, a kind of data uploading extender card device embedded in computer as claimed in claim 2 is characterized in that, described read-only memory unit has been stored unique identifier of device.
4, a kind of data uploading extender card device embedded in computer as claimed in claim 2 is characterized in that, described data channel unit comprises,
The Data Receiving passage is used to receive from the data of Data Input Interface unit and historical data and the identification signal of exporting from control module, and data that receive are write the data buffer;
The data buffer is connected in the Data Receiving passage, is used to transmit the cushioning medium storage of data;
The data sendaisle is connected in Data Receiving passage and data buffer, in order to from the data buffer reading of data, and these data is exported to the data output unit.
5, a kind of data uploading extender card device embedded in computer as claimed in claim 4 is characterized in that, described data buffer has the memory module of carrying out read and write data manipulation ability simultaneously.
6, a kind of data uploading extender card device embedded in computer as claimed in claim 2 is characterized in that: described data channel unit can adopt FPGA or adopt FPGA+ static random storage chip to constitute.
7, a kind of data uploading extender card device embedded in computer as claimed in claim 2 is characterized in that: described control module adopts the processor of low performance or FPGA to realize.
8, a kind of data uploading extender card device embedded in computer as claimed in claim 1 or 2 is characterized in that: described data sheet adopts the SOC technology to realize to transport module and expanded slot of computer interface unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810226846A CN100594506C (en) | 2008-11-18 | 2008-11-18 | Data uploading transmission extension card apparatus embeded in computer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810226846A CN100594506C (en) | 2008-11-18 | 2008-11-18 | Data uploading transmission extension card apparatus embeded in computer |
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| Publication Number | Publication Date |
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| CN101398877A true CN101398877A (en) | 2009-04-01 |
| CN100594506C CN100594506C (en) | 2010-03-17 |
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| CN200810226846A Expired - Fee Related CN100594506C (en) | 2008-11-18 | 2008-11-18 | Data uploading transmission extension card apparatus embeded in computer |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102624445A (en) * | 2012-03-12 | 2012-08-01 | 成都龙冠科技实业有限公司 | Infrared-based unidirectional data transmission equipment |
| CN103218323A (en) * | 2013-03-25 | 2013-07-24 | 广东工业大学 | High-speed data acquisition and transmission device |
| CN103677675A (en) * | 2013-12-30 | 2014-03-26 | 深圳市维信联合科技有限公司 | Data input method, data input device and data input system |
| CN106445420A (en) * | 2016-10-12 | 2017-02-22 | 安徽徽云信息科技有限公司 | Computer storage system |
| CN106982195A (en) * | 2016-01-19 | 2017-07-25 | 刘晓建 | A kind of utilization PLD realizes the device of unidirectional information transfer |
| CN112699072A (en) * | 2020-12-24 | 2021-04-23 | 北京鼎普科技股份有限公司 | Data transmission method, device and system |
-
2008
- 2008-11-18 CN CN200810226846A patent/CN100594506C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102624445A (en) * | 2012-03-12 | 2012-08-01 | 成都龙冠科技实业有限公司 | Infrared-based unidirectional data transmission equipment |
| CN103218323A (en) * | 2013-03-25 | 2013-07-24 | 广东工业大学 | High-speed data acquisition and transmission device |
| CN103218323B (en) * | 2013-03-25 | 2016-09-21 | 广东工业大学 | A kind of high-speed data acquisition and transmitting device |
| CN103677675A (en) * | 2013-12-30 | 2014-03-26 | 深圳市维信联合科技有限公司 | Data input method, data input device and data input system |
| CN106982195A (en) * | 2016-01-19 | 2017-07-25 | 刘晓建 | A kind of utilization PLD realizes the device of unidirectional information transfer |
| CN106445420A (en) * | 2016-10-12 | 2017-02-22 | 安徽徽云信息科技有限公司 | Computer storage system |
| CN112699072A (en) * | 2020-12-24 | 2021-04-23 | 北京鼎普科技股份有限公司 | Data transmission method, device and system |
| CN112699072B (en) * | 2020-12-24 | 2023-08-15 | 北京鼎普科技股份有限公司 | Data transmission method, device and system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100594506C (en) | 2010-03-17 |
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