Information one-way isolation transmission method based on image coding recognition

Abstract

The invention discloses an information one-way isolated transmission method based on image coding recognition, and relates to the technical field of one-way isolated transmission, the method comprises a data acquisition unit (1), a two-dimensional code display screen (2), a code scanning gun (3) and a data storage unit (4), the coding technology is utilized to convert field data into a two-dimensional code form, and the two-dimensional code form is transmitted through a 485 protocol; the coding mode is matched with the display characteristic of the liquid crystal module of the two-dimensional code display screen, the liquid crystal module accurately adjusts the driving voltage according to the reflectivity information of the two-dimensional code module, the accuracy of two-dimensional code display is ensured, meanwhile, the code scanning gun can accurately collect and decode the specially coded two-dimensional code, decoding errors are reduced, and the data storage unit is used for storing data. The gateway module can store data containing reflectivity information, the information can be used for follow-up analysis, and the integrity and confidentiality of the data can be guaranteed through an error correction coding segment in the transmission process.

Description

Technical Field

[0001] The present invention relates to the technical field of unidirectional isolated transmission, and in particular to a method for unidirectional isolated transmission of information based on image coding recognition. Background Art

[0002] One-way isolated transmission refers to the use of a transmission component with physical one-way transmission characteristics. One end of the component only sends signals, and the other end only receives signals. The two form a trusted one-way channel without any feedback information.

[0003] One-way isolated transmission involves achieving secure and controllable data exchange between networks of different levels on the basis of secure isolation, fully meeting relevant policies, regulations and regulatory requirements in the isolated network environment, and helping high-density network users such as the government, public security, procuratorial, judicial, military and military industry to strengthen compliance construction and meet regulatory requirements.

[0004] Based on this, the present invention designs a method for one-way isolated transmission of information based on image coding recognition to solve the above problem. Summary of the invention

[0005] The purpose of the present invention is to make up for the shortcomings of the prior art and provide a method for unidirectional isolated transmission of information based on image coding recognition. It can adopt a transmission component with physical unidirectional transmission characteristics. One end of the data acquisition unit only sends signals, and one end of the data storage unit only receives signals. The two constitute a trusted unidirectional channel without any feedback information.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a method for one-way isolated transmission of information based on image coding recognition, the method comprising: a data acquisition unit (1), a two-dimensional code display screen (2), a code scanning gun (3) and a data storage unit (4);

[0007] The data acquisition unit (1) is used to collect field data through the DI and AI modules, analyze and collect the data, and output the data to the QR code display screen in the form of a QR code containing light reflectivity adjustment through the 485 protocol, while realizing communication between the data acquisition units, wherein the light reflectivity adjustment code is R i =R base +k×P i , where R i is the reflectivity of the i-th module of the QR code, R base is the minimum reflectivity benchmark, k is the reflectivity adjustment coefficient, P i is the data priority value assigned to the i-th module;

[0008] The two-dimensional code display screen (2) is used to receive the two-dimensional code data transmitted by the data acquisition unit using the 485 protocol, and to display the two-dimensional code;

[0009] The barcode scanning gun (3) is used to collect the two-dimensional code data displayed on the two-dimensional code display screen, and decode and transmit it to the data storage unit;

[0010] The data storage unit (4) is used to implement local storage of data through custom software and to forward data to a higher-level management unit.

[0011] Furthermore, the data acquisition unit (1) comprises a CPU module (11), a digital quantity input module (12), a digital quantity output module (13), and a data communication module (14), wherein:

[0012] The CPU module (11) performs an in-depth analysis on the collected field data, and when converting the data into a two-dimensional code format, uses a coding algorithm based on light reflectivity adjustment to assign different reflectivity values ​​to each module of the two-dimensional code according to different priority attributes of the data, and outputs the encoded two-dimensional code data to a two-dimensional code display screen through a 485 protocol;

[0013] The digital quantity input module (12) realizes the field data acquisition function and provides raw data for encoding and transmission;

[0014] The digital quantity output module (13) outputs a protection signal when protection information is sent out in the on-site industrial control system;

[0015] The data communication module (14) ensures data communication between the data acquisition units, and ensures the consistency and accuracy of the data during the entire transmission and communication process.

[0016] Furthermore, the two-dimensional code display screen (2) comprises a liquid crystal module (21) and a data communication module (22), wherein:

[0017] When the liquid crystal module (21) displays a two-dimensional code, the arrangement of liquid crystal molecules and the driving voltage are precisely adjusted according to the coded information. For important information with a high priority in the two-dimensional code, the driving voltage of the liquid crystal pixels is increased to make it present a high reflectivity; for auxiliary information and verification information, a low driving voltage is used to produce a low reflectivity;

[0018] The data communication module (22) is responsible for transmitting the on-site collected data to the upper-level management unit while completing the display of the two-dimensional code, thereby ensuring the real-time sharing and further processing of the data.

[0019] Furthermore, the data storage unit (4) comprises a gateway module (41), a CS gateway configuration tool (42), and a data communication module (43), wherein:

[0020] The gateway module (41) stores the collected field data, which, after being decoded by a barcode scanner, retains the reflectivity information in the original code for subsequent data tracing and analysis;

[0021] The CS gateway configuration tool (42) is used to configure the gateway module so that it can correctly process and store data containing coded information of different priorities;

[0022] The data communication module (43) realizes the function of transmitting the on-site collected data to the upper-level management unit, thereby ensuring the efficient operation of the entire one-way isolated transmission of information.

[0023] Furthermore, when the liquid crystal module (21) receives the two-dimensional code data containing reflectivity information, for each two-dimensional code module, reads the corresponding reflectivity value R i , the LCD module calculates the driving voltage V i : Where V min and V max is the minimum and maximum driving voltage of the LCD module, R min and R max It is the minimum and maximum value of the reflectivity of the QR code module. The reflectivity value is converted into a driving voltage to adjust the arrangement of liquid crystal molecules, thereby accurately displaying QR codes with different reflectivities.

[0024] Furthermore, the barcode scanner (3) detects the light intensity I of the reflected light from the two-dimensional code module, calculates the reflectivity R of each module through the calibrated light intensity-reflectivity relationship curve R=f(I), and converts the reflectivity value R i =R base +k×P i The inverse operation of Calculate the data priority P i , where R i is the reflectivity of the i-th module of the QR code, R base is the minimum reflectivity benchmark, k is the reflectivity adjustment coefficient, P i It is the data priority value assigned to the i-th module, thereby realizing the decoding of the QR code data.

[0025] Furthermore, when storing data, the gateway module (41) decodes the data obtained by the barcode scanner and includes the data priority P i The data of reflectivity information are stored in the order of timestamps. The storage structure adopts a hierarchical storage method. Each layer corresponds to a priority. The data is stored in the corresponding layer according to the priority of the data. When tracing and analyzing the data, the data of the specific priority layer is queried to obtain and analyze the data.

[0026] Furthermore, during the 485 protocol transmission between the data acquisition unit (1) and the two-dimensional code display screen (2), error correction coding is performed on the two-dimensional code data including the reflectivity adjustment, and error correction code elements are added on the basis of the original two-dimensional code data. That is, the length of the original two-dimensional code data is n, and the number m of error correction code elements to be added is calculated according to m=log2(n+m+1), where m is rounded up. During the transmission process, errors in the two-dimensional code data caused by channel interference are corrected to ensure the integrity of the two-dimensional code data.

[0027] Compared with the prior art, this method of one-way isolated transmission of information based on image coding recognition has the following beneficial effects:

[0028] 1. The present invention utilizes coding technology to convert field data into a two-dimensional code format and transmits it through a 485 protocol. This coding method matches the display characteristics of the liquid crystal module of the two-dimensional code display screen. The liquid crystal module accurately adjusts the driving voltage according to the reflectivity information of the two-dimensional code module, thereby ensuring the accuracy of the two-dimensional code display. At the same time, the barcode scanner can accurately collect and decode this specially encoded two-dimensional code, thereby reducing decoding errors. In the data storage unit, the gateway module can store data containing reflectivity information, which can be used for subsequent analysis, and the error correction coding segment can be used during the transmission process to ensure the integrity and confidentiality of the data.

[0029] 2. The present invention outputs the field data in the form of a two-dimensional code containing light reflectivity adjustment in the data acquisition unit, so that the information is effectively protected at the initial stage of transmission. In the process of generating the two-dimensional code, different reflectivity values ​​are assigned to each module according to the priority attribute of the data, thereby increasing the difficulty of illegally obtaining information and further ensuring the security of the entire information transmission process.

[0030] Other advantages, objectives and features of the present invention will be set forth in part in the following description and, in part, will be apparent to those skilled in the art based on an examination of the following or may be taught from the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are only some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0032] Figure 1 A schematic diagram of the framework structure of a method for one-way isolated transmission of information based on image coding recognition according to the present invention;

[0033] Figure 2 It is a schematic diagram of the framework structure of the data acquisition unit in the present invention;

[0034] Figure 3 It is a schematic diagram of the framework structure of the two-dimensional code display screen in the present invention;

[0035] Figure 4 A schematic diagram of the framework structure of the data storage unit in the present invention;

[0036] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0037] 1-data storage unit, 11-CPU module, 12-digital input module, 13-digital output module, 14-data communication module, 2-QR code display, 21-LCD module, 22-data communication module, 3-barcode scanner, 4-data storage unit, 41-gateway module, 42-CS gateway configuration tool, 43-data communication module. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] The present invention provides a technical solution: a method for unidirectional isolated transmission of information based on image coding recognition, comprising a data acquisition unit (1), a two-dimensional code display screen (2), a code scanning gun (3) and a data storage unit (4), wherein the data acquisition unit (1) comprises a CPU module (11), a digital quantity input module (12), a digital quantity output module (13) and a data communication module (14), collects key data on site through DI and AI modules, converts the data into a two-dimensional code by using a coding method based on light reflectivity adjustment, and the data acquisition unit outputs the two-dimensional code data after the special coding to the two-dimensional code display screen (2) through a 485 protocol. At the same time, the data communication module (14) ensures communication between the data acquisition units, and the two-dimensional code display screen (2) comprises a liquid crystal module (21) and a data communication module (22), receives the two-dimensional code data containing the light reflectivity adjustment coding transmitted by the data acquisition unit through a 485 protocol, and when displaying the two-dimensional code, the liquid crystal module (21) can accurately present modules with different reflectivity, and the difference in reflectivity is obtained by adjusting the liquid crystal. The display technology is optimized, that is, the voltage of each display pixel is controlled to adjust its optical reflection characteristics, so as to accurately display the two-dimensional code with special coding. The data communication module (22) can also transmit the data collected on site to the upper management unit. The barcode scanner (3) has a special optical sensor, which can not only identify the black and white modules of the traditional two-dimensional code, but also accurately detect the areas with different reflectivity in the two-dimensional code. By analyzing the reflected light intensity, the barcode scanner can collect the two-dimensional code data containing the reflectivity adjustment code displayed on the two-dimensional code display screen, and decode it, and then transmit the decoded data to the data storage unit (4). The data storage unit (4) includes a gateway module (41), a CS gateway configuration tool (42), and a data communication module (43), which are used to realize the local storage of data and forward the data to the upper management unit. The gateway module (41) stores the collected key data, the CS gateway configuration tool (42) is used to configure the gateway module, and the data communication module (43) is used to realize the transmission function of the on-site collected data to the upper management unit.

[0040] Embodiment 1

[0041] This embodiment describes in detail the specific process of applying the method of one-way isolated transmission of information based on image coding recognition of the present invention in a large-scale chemical production plant to ensure the safe and reliable transmission of key production data.

[0042] First, in a specific implementation, multiple data acquisition units (1) are deployed in various production areas of the factory, such as the reaction workshop, storage tank area, etc. These data acquisition units (1) are connected to the server of the central monitoring room through a wired network, and at the same time establish a communication link with a nearby two-dimensional code display screen (2). Each data acquisition unit (1) is equipped with multiple types of sensors for collecting different types of field data, namely temperature sensors, pressure sensors, and liquid level sensors. These sensors are respectively connected to a digital input module (12) and an analog input module (12). The central monitoring room is provided with a data storage unit (4) for centrally storing and managing data transmitted from each data acquisition unit (1). At the same time, it is equipped with a number of barcode scanners (3) for inspection personnel to obtain information on the two-dimensional code display screen (2) on site and transmit it back to the data storage unit (4).

[0043] In the reaction workshop, the temperature sensor and pressure sensor installed on the reactor monitor the temperature and pressure changes in the reaction process in real time. The temperature sensor converts the continuously changing temperature value into a digital signal through the analog input module (12) and transmits it to the CPU module (11). The same is true for the pressure sensor. The temperature value collected by the temperature sensor is T, and the pressure value collected by the pressure sensor is P. The CPU module (11) analyzes the collected data according to the preset rules to determine its priority. Normal temperature and pressure data are set to low priority, and when the temperature exceeds the set safety threshold T max Or the pressure fluctuates abnormally (the pressure change rate exceeds ΔP max ), these data are judged as high priority, and the data priority is set as P i , for low priority data P i =P low ; For high priority data, P i =P high , the light reflectance adjustment coding formula R in the light reflectance adjustment coding i =R base +k×P i , the CPU module (11) calculates the reflectivity value of each two-dimensional code module, where R base is the basic reflectivity, k is the reflectivity adjustment coefficient, and for the two-dimensional code module corresponding to the low priority data, its reflectivity R low =R base +k×P low ; For the QR code module corresponding to the high priority data, its reflectivity R high =R base +k×P highThe encoded two-dimensional code data is transmitted to the two-dimensional code display screen (2) through the data communication module (14) using the 485 protocol. During the transmission process, the two-dimensional code data is error-corrected. Assuming that the length of the original two-dimensional code data is n, the number of error-correcting code elements m (m is rounded up) to be added is calculated according to m=log2(n+m+1) to improve the reliability of data transmission and prevent data errors caused by channel interference. After the liquid crystal module (21) of the two-dimensional code display screen (2) receives the two-dimensional code data transmitted by the data acquisition unit (1), for each two-dimensional code module, the corresponding reflectivity value R is read. i , then, according to Calculate the driving voltage V i , where V min and V max is the minimum and maximum driving voltage of the LCD module, R min and R max It is the minimum and maximum value of the reflectivity of the two-dimensional code module. By accurately adjusting the driving voltage of each module, the arrangement of the liquid crystal molecules is adjusted, so that the two-dimensional code with different reflectivity is accurately displayed. The data upload data communication module (22) transmits the field collected data (including sensor data, data collection time, equipment number and other basic information) to the upper-level management unit (i.e., the server in the central monitoring room) while completing the two-dimensional code display, to ensure real-time sharing of data so that the monitoring personnel can timely understand the situation of the production site.

[0044] Subsequently, the inspection personnel use a barcode scanner (3) to scan the QR code on the QR code display screen (2) on site. The optical sensor of the barcode scanner (3) detects the light intensity I of the reflected light from the QR code module, and then calculates the reflectivity R of each module through a pre-calibrated light intensity-reflectivity relationship curve R=f(I) (the curve is obtained by measuring the light intensity under a standard sample with known reflectivity and then performing data fitting). The calculated reflectivity value is inversely calculated. Calculate the data priority P iAccording to the data priority, the barcode scanner (3) can accurately decode the two-dimensional code data and restore the original sensor data (such as temperature value T and pressure value P). The decoded data is transmitted to the data storage unit (4) through wireless communication. After the gateway module (41) of the data storage unit (4) receives the data transmitted by the barcode scanner (3), the data containing the data priority and reflectivity information is stored in the order of timestamps. The storage structure adopts a hierarchical storage method, and each layer corresponds to a priority range. For example, high priority data is stored in the first layer, medium priority data is stored in the second layer, and low priority data is stored in the third layer. In this way, during data tracing and analysis, data of specific importance can be quickly obtained and analyzed by querying data in a specific priority layer. The data communication module (43) forwards the stored data to the upper-level management system. The production management software platform can perform further analysis and decision-making based on the priority and content of the data. When high-priority temperature or pressure abnormal data is received, the platform can immediately issue an alarm to notify relevant personnel to ensure the safety and stability of the production process. At the same time, engineers can retrieve historical data from the data storage unit (4) at any time for tracing and analysis, view the data change trend in the production process, optimize the production process, and improve production efficiency and product quality.

[0045] Finally, if a sensor in the data acquisition unit (1) fails: the digital output module (13) will detect an abnormal signal and output a protection signal. At the same time, the CPU module (11) will encode the fault information into the two-dimensional code data and display it through the two-dimensional code display screen (2). The inspection personnel use the barcode scanner (3) to collect the fault information and transmit it to the data storage unit (4). The maintenance personnel can perform maintenance in time according to the fault record in the storage unit. If the transmission process is abnormal: during the 485 protocol transmission between the data acquisition unit (1) and the two-dimensional code display screen (2), if the two-dimensional code data is wrong due to channel interference, the error correction coding mechanism will play a role. The receiving end (two-dimensional code display screen (2) or barcode scanner (3)) can detect and correct the error according to the error correction code element. If the error cannot be corrected, the barcode scanner (3) will find the data abnormality during decoding and send an error report to the data storage unit (4). The data storage unit (4) records the error information and notifies the relevant personnel to check the transmission line and equipment to ensure the accuracy of data transmission. If the barcode scanner decodes abnormally: the barcode scanner will automatically rescan the QR code. If it still cannot be decoded correctly after multiple attempts, the barcode scanner will issue an alarm to prompt the operator and record the abnormal situation and transmit it to the data storage unit (4). The operator can check whether the barcode scanner is working properly and whether the QR code display screen is damaged or stained, etc., to ensure that the data can be accurately collected and decoded.

[0046] In summary, through the above embodiments in industrial control systems, the effectiveness and reliability of the one-way isolated transmission method of information based on image coding recognition in practical applications are fully demonstrated. This method can not only ensure the security of data during transmission, prevent information leakage and tampering, but also ensure the accuracy and real-time nature of the data, providing strong support for the efficient and safe operation of industrial production.

[0047] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A method for unidirectional isolated transmission of information based on image coding recognition, characterized in that: The method comprises: a data collection unit (1), a two-dimensional code display screen (2), a code scanning gun (3) and a data storage unit (4); The data acquisition unit (1) is used to collect field data through the DI and AI modules, analyze and collect the data, and output the data to the QR code display screen in the form of a QR code containing light reflectivity adjustment through the 485 protocol, while realizing communication between the data acquisition units, wherein the light reflectivity adjustment code is R i =R base +k×P i , where R i is the reflectivity of the i-th module of the QR code, R base is the minimum reflectivity benchmark, k is the reflectivity adjustment coefficient, P i is the data priority value assigned to the i-th module; The two-dimensional code display screen (2) is used to receive the two-dimensional code data transmitted by the data acquisition unit using the 485 protocol, and to display the two-dimensional code; The barcode scanning gun (3) is used to collect the two-dimensional code data displayed on the two-dimensional code display screen, and decode and transmit it to the data storage unit; The data storage unit (4) is used to implement local storage of data through custom software and to forward data to a higher-level management unit.

2. According to claim 1, a method for one-way isolated transmission of information based on image coding recognition is characterized in that: The data acquisition unit (1) comprises a CPU module (11), a digital quantity input module (12), a digital quantity output module (13), and a data communication module (14), wherein: The CPU module (11) performs an in-depth analysis on the collected field data, and when converting the data into a two-dimensional code format, uses a coding algorithm based on light reflectivity adjustment to assign different reflectivity values ​​to each module of the two-dimensional code according to different priority attributes of the data, and outputs the encoded two-dimensional code data to a two-dimensional code display screen through a 485 protocol; The digital quantity input module (12) realizes the field data acquisition function and provides raw data for encoding and transmission; The digital quantity output module (13) outputs a protection signal when protection information is sent out in the on-site industrial control system; The data communication module (14) ensures data communication between the data acquisition units, and ensures the consistency and accuracy of the data during the entire transmission and communication process.

3. According to claim 1, a method for one-way isolated transmission of information based on image coding recognition is characterized in that: The two-dimensional code display screen (2) comprises a liquid crystal module (21) and a data communication module (22), wherein: When the liquid crystal module (21) displays a two-dimensional code, the arrangement of liquid crystal molecules and the driving voltage are precisely adjusted according to the coded information. For important information with a high priority in the two-dimensional code, the driving voltage of the liquid crystal pixels is increased to make it present a high reflectivity; for auxiliary information and verification information, a low driving voltage is used to produce a low reflectivity; The data communication module (22) is responsible for transmitting the on-site collected data to the upper-level management unit while completing the display of the two-dimensional code, thereby ensuring the real-time sharing and further processing of the data.

4. According to claim 1, the method for one-way isolated transmission of information based on image coding recognition is characterized in that: The data storage unit (4) comprises a gateway module (41), a CS gateway configuration tool (42), and a data communication module (43), wherein: The gateway module (41) stores the collected field data, which, after being decoded by a barcode scanner, retains the reflectivity information in the original code for subsequent data tracing and analysis; The CS gateway configuration tool (42) is used to configure the gateway module so that it can correctly process and store data containing coded information of different priorities; The data communication module (43) realizes the function of transmitting the on-site collected data to the upper-level management unit, thereby ensuring the efficient operation of the entire one-way isolated transmission of information.

5. According to claim 3, a method for one-way isolated transmission of information based on image coding recognition is characterized in that: When the liquid crystal module (21) receives the two-dimensional code data containing reflectivity information, for each two-dimensional code module, the corresponding reflectivity value R is read. i , the LCD module calculates the driving voltage Where V min and V max is the minimum and maximum driving voltage of the LCD module, R min and R max It is the minimum and maximum value of the reflectivity of the QR code module. The reflectivity value is converted into a driving voltage to adjust the arrangement of liquid crystal molecules, thereby accurately displaying QR codes with different reflectivities.

6. According to claim 1, a method for one-way isolated transmission of information based on image coding recognition is characterized in that: The barcode scanning gun (3) detects the light intensity I of the reflected light from the two-dimensional code module, calculates the reflectivity R of each module through the calibrated light intensity-reflectivity relationship curve R=f(I), and converts the reflectivity value R i =R base +k×P i The inverse operation of Calculate the data priority P i , where R base is the minimum reflectivity benchmark, k is the reflectivity adjustment coefficient, P i It is the data priority value assigned to the i-th module, thereby realizing the decoding of the QR code data.

7. The method for one-way isolated transmission of information based on image coding recognition according to claim 4, characterized in that: When storing data, the gateway module (41) decodes the data obtained by the barcode scanner and includes the data priority P i The data of reflectivity information are stored in the order of timestamps. The storage structure adopts a hierarchical storage method. Each layer corresponds to a priority. The data is stored in the corresponding layer according to the priority of the data. When tracing and analyzing the data, the data of the specific priority layer is queried to obtain and analyze the data.

8. The method for one-way isolated transmission of information based on image coding recognition according to claim 1, characterized in that: During the 485 protocol transmission between the data acquisition unit (1) and the two-dimensional code display screen (2), error correction coding is performed on the two-dimensional code data including the reflectivity adjustment, and error correction code elements are added on the basis of the original two-dimensional code data, that is, the length of the original two-dimensional code data is n, and the number m of error correction code elements to be added is calculated according to m=log2(n+m+1), where m is rounded up, and two-dimensional code data errors caused by channel interference are corrected during the transmission process to ensure the integrity of the two-dimensional code data.

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