CN114268454B - Data ferrying method for physical isolation environment - Google Patents
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Abstract
The invention discloses a data ferrying method for a physical isolation environment, which comprises the following steps: acquiring target data; dividing the acquired target data into a plurality of data packets according to a preset program, wherein each data packet comprises a plurality of data frames; each data frame is encoded one by one, and corresponding color two-dimensional codes are generated; the intranet plays the generated color two-dimensional codes one by one; the outer network shoots the color two-dimensional codes played by the inner network one by one, decodes the shot color two-dimensional codes one by one, and restores target data; wherein, the physical isolation between the external network and the internal network gateway is set. The invention can realize the data ferry of the physical isolation environment.
Description
Technical Field
The invention relates to a data ferrying method for a physical isolation environment, and belongs to the technical field of data ferrying transmission.
Background
And for safety consideration, the data communication between the internal network and the external network of the new energy power station power prediction system adopts a unidirectional transmission mode. The external network and the internal network are completely isolated, disconnected and independently exist in physical terms through the reverse isolation device, and the internal network cannot directly transmit data to the external network. However, the power prediction model needs to train and optimize the field data collected by the intranet power prediction host, so that the intranet and the extranet are required to be logically connected, and moderate data communication can be performed.
The existing modes of ferrying data are as follows: the method comprises a double-machine double-network ferrying method, a manual copying ferrying method, an optical disc ferrying method, an isolation gateway ferrying method and an image ferrying method. The dual-machine dual-network ferrying method and the isolation gateway ferrying method can meet the standards of network security isolation, but require frequent switching of networks or gateways, are inconvenient to use and cannot be automatically realized. Similarly, the manual copying ferrying method and the optical disc ferrying method need manual participation and are not automatic enough; in addition, the storage medium for copying data is easily affected by viruses and the like, so that hidden danger is generated in the security of the intranet. The image ferrying method is to generate two-dimensional codes from data, and the digital capacity of the two-dimensional codes is generally about 3K, so that the two-dimensional codes cannot adapt to ferrying transmission of large data volume.
Therefore, under physical isolation conditions, an automated solution for data ferry is needed that maintains logical connections and improves usability while ensuring system security. The invention provides a data ferrying method of a physical isolation environment, which can keep logical connection and improve usability while ensuring the safety of a system.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a data ferrying method for a physical isolation environment, which can realize data ferrying of the physical isolation environment.
In order to achieve the above purpose, the invention is realized by adopting the following technical scheme:
the invention provides a data ferrying method for a physical isolation environment, which comprises the following steps:
acquiring target data;
dividing the acquired target data into a plurality of data packets according to a preset program, wherein each data packet comprises a plurality of data frames;
each data frame is encoded one by one, and corresponding color two-dimensional codes are generated;
the intranet plays the generated color two-dimensional codes one by one;
the outer network shoots the color two-dimensional codes played by the inner network one by one, decodes the shot color two-dimensional codes one by one, and restores target data;
wherein, the physical isolation between the external network and the internal network gateway is set.
Further, the target data comprise network-connected active power, starting capacity, operation maintenance and repair and electricity limiting information of the new energy power station of the intranet and time sequence data of historical weather.
Further, the dividing the acquired target data into a plurality of data packets according to the preset program includes:
dividing target data into a plurality of data packets according to the type of the target data;
each data packet includes a plurality of equal-sized data frames.
Further, the dividing each data packet into a plurality of corresponding data frames one by one according to a preset data frame format includes:
the first frame of data frame of each data packet is a first frame, and each frame of data frame is a following frame;
each data frame comprises a data head and a data area, and the data area is tightly connected with the corresponding data head;
the data head formats of the first frame and each following frame are different, and the data area formats of the first frame and each following frame are the same.
Further, the header format of the first frame includes:
a packet sequence number recorded in 2 bytes;
a first frame number recorded in 2 bytes;
the entire packet size of the 4 byte record;
single frame capacity size of 2 byte record;
the amount of data contained in the 2 byte recorded data packet;
2 bytes of recorded data area frame number;
check code recorded in 4 bytes.
Further, the following frame header format includes:
a following frame block sequence number of 2 bytes record;
a following frame number recorded in 2 bytes;
wherein the frame number of the following frame starts from 1, and the frame number increases from each following frame.
Further, each data frame data area format includes:
data point serial number recorded by 3 bytes;
a 1 byte recorded data type;
a time stamp recorded in 8 bytes;
a data size of 2 bytes record;
actual data recorded in bytes of data size;
when the total data amount of each data frame data area is smaller than Shan Zhen capacity fs, n data are contained in a certain frame, and the actual data size is Σdata_size (k), so that the condition needs to be satisfied:wherein k is an integer between 1 and n;
when the last frame of data is not filled with the data frame, the rest blank part is filled with 0.
Further, the step of encoding each data frame in each data packet one by one and generating a plurality of corresponding color two-dimensional codes includes:
encoding each data frame into a color two-dimensional code picture;
each color two-dimensional code comprises 2n colors, and each color codes an n-bit binary number;
wherein n is 4 or 8, and the matrix size of the color two-dimensional code is 100x100, 150x150 or 200x200.
Further, the speed of the intranet to play the generated color two-dimensional codes one by one is N pages/second.
Further, the external network shoots the played color two-dimensional codes one by one, decodes the shot color two-dimensional codes one by one, and the recovery of the target data comprises:
the outer network shoots the color two-dimensional codes played one by the inner network at the rate of 2N frames/second, and continuously shoots the color two-dimensional codes played by each page of the two frames;
according to the color types during encoding, decoding the shot color two-dimensional codes one by one to obtain corresponding data frames, and comparing and decoding two frames of data frames obtained by continuously shooting the same color two-dimensional code:
when the color two-dimensional code of the first frame data frame is decoded, comparing whether the data packet sequence numbers of the two continuous frames of data frames are the same as the first frame sequence numbers respectively, if so, acquiring fails, if so, acquiring successfully, analyzing and acquiring the first frame data according to the format of the first frame data frame, and storing;
when decoding the color two-dimensional code of the following frame data frame, comparing whether the data packet sequence numbers of the two continuous frame data frames are the same as the following frame sequence numbers respectively, if so, failing to acquire, if so, analyzing each data frame according to the format of the following frame data frame, and arranging each data frame according to the sequence of the following frame sequence numbers to form a data packet;
and calculating decoding check codes forming the data packet, comparing the decoding check codes with check codes recorded by the first frame of data frame, if the decoding check codes are different from the check codes, decoding the data packet fails, if the decoding check codes are the same, decoding the data packet successfully, and classifying and storing the data according to the data type to obtain actual target data.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the target data is encoded through the color two-dimensional code, so that the capacity of data transmission can be improved, and the efficiency of data ferrying can be improved; the target data is divided into data frames with uniform formats, so that the difficulty of encoding and decoding the data is reduced, and the efficiency of data ferrying is improved; by setting check code comparison, the accuracy of data ferry is improved; and the target data is restored by shooting the played color two-dimensional code and decoding frame by frame, so that the automation degree of the data ferry is improved.
Drawings
FIG. 1 is a flow chart of one embodiment of a data ferrying method for a physically isolated environment of the present invention;
FIG. 2 is a diagram illustrating an embodiment of the packet format of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present invention, and are not intended to limit the scope of the present invention.
Example 1
The embodiment provides a data ferrying method for a physical isolation environment, referring to fig. 1, including the following steps:
acquiring target data;
dividing the acquired target data into a plurality of data packets according to a preset program, wherein each data packet comprises a plurality of data frames;
each data frame is encoded one by one, and corresponding color two-dimensional codes are generated;
the intranet plays the generated color two-dimensional codes one by one;
the outer network shoots the color two-dimensional codes played by the inner network one by one, decodes the shot color two-dimensional codes one by one, and restores target data;
the target data are target data of an intranet, and the external network and the intranet gateway are physically isolated.
According to the invention, the color two-dimensional codes of each data frame can be coded by shooting the internal network one by one, and then the shot color two-dimensional codes are decoded one by one, so that the data ferrying of the physical isolation environment is completed.
Example 2
On the basis of embodiment 1, this embodiment also describes that dividing the acquired target data into a plurality of data packets according to a preset program includes: dividing the target data into a plurality of data packets according to the type of the target data, wherein each data packet comprises a plurality of data frames with equal size.
The target data are time sequence data, and the time sequence data comprise time sequence data of grid-connected active power, starting capacity, operation, maintenance, overhaul and electricity limiting information and historical weather of the new energy power station.
When in use, referring to fig. 2, the first frame of data frame of each data packet is the first frame, and each frame of data frame is the following frame; each data frame comprises a data head and a data area, the data areas are tightly connected with the corresponding data heads, wherein the data head formats of the first frame and each following frame are different, and the data area formats of the first frame and each following frame are the same.
Example 3
On the basis of embodiment 2, referring to fig. 2, this embodiment also introduces a header format of the first frame, a header format of the following frame, and a data area format of each data frame.
Referring to the header format list of the first frame data frame in table 1, the first frame header format includes:
2 bytes 0000-0001 recorded packet sequence number block_id;
the first frame number frame_id recorded in 2 bytes 0002-0003;
the entire packet size block_size recorded in 4 bytes 0004-0007;
single frame size frame_size recorded in 2 bytes 0008-0009;
the data amount data_num contained in the data packet recorded in 2 bytes 000A-000B is denoted as dn;
data area frame number frame_num recorded in 2 bytes 000C-000D;
4 bytes 000E-0011.
Referring to table 1, after the header, the data area is directly connected, and the data area included in the first frame data frame is the 0 th frame.
Table 1 list of header formats for first frame data frame
The (two) follow frame header format includes:
a following frame block sequence number block_id recorded by 2 bytes;
a following Frame number frame_id recorded in 2 bytes;
wherein the following Frame sequence number frame_id starts from 1, and each following Frame sequence number frame_id increases itself.
Thirdly, the data areas of the data frames sequentially arrange dn quantity data, and the actual size of each data is asymmetric because the data type of each data frame is different, so that the formats of the data areas of the data frames are unified as follows:
data point sequence number pt_id of 3 bytes record;
data type data_type recorded in 1 byte;
8 bytes of recorded timestamp time_stamp;
data size data_size of 2 bytes record;
actual data recorded in data size data_size bytes;
if the data frames of the data packet are the same in size, the total data amount of the data frame data areas is not greater than the capacity fs of a single frame data frame, n data are contained in a certain frame, and the actual data size is Σdata_size (k), so that the conditions are required to be satisfied:wherein k is an integer between 1 and n;
when the last frame of data is not filled with the data frame, the rest blank part is filled with 0.
Example 4
On the basis of any one of embodiments 1 to 3, this embodiment describes that encoding each data frame in each data packet one by one, and generating a plurality of corresponding color two-dimensional codes includes:
encoding each data frame into a color two-dimensional code picture; each color two-dimensional code comprises 2n colors, and each color codes an n-bit binary number. Wherein n is 4 or 8, and the matrix size of the color two-dimensional code is 100x100, 150x150 or 200x200. Referring to table 2, table 2 shows a coding table of 16-color corresponding binary numbers when n is 4, and each RGB color value in the table encodes one 4-bit binary number. And converting and encoding binary data content of each data frame into RGB color values according to the encoding table of the table 2, and completing the encoding process of the 16-color two-dimensional code.
When the method is applied, the color palette of RGB8 of the industrial high-speed camera selected when the color two-dimensional code played by the intranet is shot is adapted, so that the graph color in the two-dimensional code can be accurately and rapidly identified.
In application, n is 8, when 256 color codes are adopted, each RGB color value codes an 8-bit binary number, and the correction is required to be carried out with a color card of a palette of RGB8 of an industrial high-speed camera for shooting and collecting two-dimensional codes.
Table 2 coding table of 16-color corresponding binary numbers
In the embodiment, a plurality of corresponding color two-dimensional codes are generated, and a streaming media file is generated according to sequence organization and played; and sequentially playing the generated streaming media files by adopting a high-refresh display, wherein the playing speed is N pages/second. And playing one generated color two-dimensional code per frame.
In the application, a 240Hz high refresh display is selected to play the streaming media files one by one, and the speed of playing the color two-dimensional code page is 50 pages/second.
Example 5
On the basis of embodiment 4, this embodiment describes specific steps of capturing played color two-dimensional codes one by the external network, and decoding the captured color two-dimensional codes one by one, so as to recover target data.
Shooting a played color two-dimensional code: and the outer network shoots the color two-dimensional codes played one by the inner network at the rate of 2N frames/second, and continuously shoots the color two-dimensional codes played by each page of the two frames. In application, a color high-speed camera with a frame rate of more than 100fps is adopted, and the high-speed shooting is carried out at a frame rate of 100 frames/second by using a high-speed color camera MV-CA016-10UC with resolution 1440x1080 and a frame rate of 166 fps.
Decoding photographed color two-dimensional codes one by one:
firstly, determining a graph range of a color two-dimensional code according to a positioning block and an edge operator, and cutting off the rest part of the image;
then, according to the color type during encoding, in application, the photographed color two-dimensional codes are decoded one by one according to the encoding table of binary numbers adopted during encoding to obtain corresponding data frames, and two frames of data frames obtained by continuously photographing the same color two-dimensional code are compared and decoded:
when the color two-dimensional code of the first frame data frame is decoded, comparing whether the data packet sequence numbers of the two continuous frames of data frames are the same as the first frame sequence numbers respectively, if so, acquiring fails, if so, acquiring successfully, analyzing and acquiring the first frame data according to the format of the first frame data frame, and storing;
when decoding the color two-dimensional code of the following frame data frame, comparing whether the data packet sequence numbers of the two continuous frame data frames are the same as the following frame sequence numbers respectively, if so, failing to acquire, if so, analyzing each data frame according to the format of the following frame data frame, and arranging each data frame according to the sequence of the following frame sequence numbers to form a data packet;
and calculating a decoding check code CRC of the data packet, comparing the decoding check code CRC with a check code CRC recorded by the first frame of data frame, if the decoding check code is different from the check code, decoding the data packet fails, if the decoding check code CRC is the same as the check code CRC, and classifying and storing the data packet according to the data type to obtain actual target data.
In the application, the external network encrypts and transmits the recovered data in the external network, and the data analysis and the storage are completed on the remote terminal.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present invention and the scope of the claims, which are all within the protection of the present invention.
Claims (7)
1. A data ferrying method for a physically isolated environment, comprising the steps of:
acquiring target data;
dividing the acquired target data into a plurality of data packets according to a preset program, wherein each data packet comprises a plurality of data frames;
each data frame is encoded one by one, and a corresponding color two-dimensional code is generated;
the intranet plays the generated color two-dimensional codes one by one;
the outer network shoots the color two-dimensional codes played by the inner network one by one, decodes the shot color two-dimensional codes one by one, and restores target data;
the external network and the internal network gateway are arranged in a physical isolation way;
the speed of the color two-dimensional code generated by the internal network in a one-by-one playing mode is N pages/second;
the external network shoots the played color two-dimensional codes one by one, decodes the shot color two-dimensional codes one by one, and restores the target data, wherein the method comprises the following steps:
the outer network shoots the color two-dimensional codes played one by the inner network at the rate of 2N frames/second, and then shoots the color two-dimensional codes played by each page of two frames one by one continuously;
according to the color types during encoding, decoding the shot color two-dimensional codes one by one to obtain corresponding data frames, and comparing and decoding two frames of data frames shot on the same color two-dimensional code:
when the color two-dimensional code of the first frame data frame is decoded, comparing whether the data packet sequence numbers of the two continuous frames of data frames are the same as the first frame sequence numbers respectively, if so, acquiring fails, if so, acquiring successfully, analyzing and acquiring the first frame data according to the format of the first frame data frame, and storing;
when decoding the color two-dimensional code of the following frame data frame, comparing whether the data packet sequence numbers of the two continuous frame data frames are the same as the following frame sequence numbers respectively, if so, failing to acquire, if so, analyzing each data frame according to the format of the following frame data frame, and arranging each data frame according to the sequence of the following frame sequence numbers to form a data packet;
calculating decoding check codes forming the data packet, comparing the decoding check codes with check codes recorded by the first frame of data frame, if the decoding check codes are different from the check codes, decoding the data packet fails, if the decoding check codes are the same, decoding the data packet successfully, classifying and storing the data packet according to the data type, and obtaining actual target data;
the step of encoding each data frame in each data packet one by one and generating a plurality of corresponding color two-dimensional codes comprises the following steps:
encoding each data frame into a color two-dimensional code picture;
each color two-dimensional code comprises 2 n Color, each color encoding an n-bit binary number;
wherein n is 4 or 8, and the matrix size of the color two-dimensional code is 100x100, 150x150 or 200x200.
2. The method of claim 1, wherein the target data includes time series data of network-connected active power, power-on capacity, operation and maintenance and electricity limiting information and historical weather of the new energy power station.
3. The data ferrying method for physical isolation environment according to claim 2, wherein the dividing the acquired target data into a plurality of data packets according to a preset program comprises:
dividing target data into a plurality of data packets according to the type of the target data;
each data packet includes a plurality of equal-sized data frames.
4. The method for data ferrying for physical isolation environment according to claim 3, wherein the dividing each data packet one by one into a plurality of corresponding data frames according to a preset data frame format comprises:
the first frame of data frame of each data packet is a first frame, and each frame of data frame is a following frame;
each data frame comprises a data head and a data area, and the data area is tightly connected with the corresponding data head;
the data head formats of the first frame and each following frame are different, and the data area formats of the first frame and each following frame are the same.
5. The data ferrying method for physical isolation environment according to claim 4, wherein the header format of the first frame comprises:
a packet sequence number recorded in 2 bytes;
a first frame number recorded in 2 bytes;
the entire packet size of the 4 byte record;
single frame capacity size of 2 byte record;
the amount of data contained in the 2 byte recorded data packet;
2 bytes of recorded data area frame number;
check code recorded in 4 bytes.
6. The method of data ferrying for a physically isolated environment according to claim 4, wherein the following frame header format comprises:
a following frame block sequence number of 2 bytes record;
a following frame number recorded in 2 bytes;
wherein the frame number of the following frame starts from 1, and the frame number increases from each following frame.
7. The data ferrying method for physical isolation environment of claim 4, wherein each data frame data field format comprises:
data point serial number recorded by 3 bytes;
a 1 byte recorded data type;
a time stamp recorded in 8 bytes;
a data size of 2 bytes record;
actual data recorded in bytes of data size;
when the total data amount of each data frame data area is smaller than Shan Zhen capacity fs, n data are contained in a certain frame, and the actual data size is Σdata_size (k), so that the condition needs to be satisfied:wherein k is an integer between 1 and n;
when the last frame of data is not filled with the data frame, the rest blank part is filled with 0.
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