A quality control system and method applied to the detection of foundation piles

Abstract

The present invention discloses a quality control system applied to the detection of foundation piles, including: a foundation pile detection terminal, a GPS positioning sensor, a camera device, a foundation pile detection sensor, and a master station control platform; the foundation pile detection sensor obtains the status data of different parts of the foundation pile and is electrically connected to the foundation pile detection terminal; the GPS positioning sensor is used to obtain the geographical location information of the current foundation pile to be detected and is electrically connected to the foundation pile detection terminal; the camera device is used to capture the target image of the survey site and is electrically connected to the foundation pile detection terminal; the foundation pile detection sensor is used by the user to process the obtained status data and establish communication with the master station control platform; the master station control platform is used to collect and control the data of the survey site. By performing security control on the collected data, it is prevented that the information is tampered with, stolen or leaked in the links of collection, transmission and control, etc., ensuring the authenticity of the data. Using the on-site image data as an encryption means ensures the randomness and uniqueness of the encryption key.

Description

Technical Field

[0001] The present invention relates to the technical field of engineering quality control, and specifically, to a quality control system and method applied to the detection of foundation piles. Background Art

[0002] The foundation project is the key part of the civil engineering of the power transmission and transformation project, and its quality is directly related to the normal use and safety of the main structure. The foundation project is a concealed project, and its supervision and inspection are difficult. Once an accident occurs, it is difficult to reinforce and treat. The construction of the power transmission and transformation project has obvious industry characteristics. Especially for the transmission line project, the line is long, the crossing area is wide, the terrain and geological conditions along the way are different, the mechanical properties of rock and soil are diverse and complex, the construction sites are scattered and restricted and affected by terrain, geology, transportation conditions, etc. It is difficult for large construction equipment and machinery to enter the construction site, the controllability of the foundation construction quality is poor, the construction and supervision are difficult, and civil engineering quality problems occur from time to time, and there are even phenomena of cutting corners. If it cannot be detected and remedied in time, it will cause inestimable losses to the entire project.

[0003] The power transmission and transformation project adopts the professional subcontracting method. The existing quality supervision system can no longer meet the requirements of intrinsic safety. Problems such as the construction unit "managing by subcontracting", the supervision unit "existing in name only", the owner management "attenuating layer by layer", and the subcontracting team "fighting scattered" are prominent. It is difficult to implement the foundation construction quality control measures, and the infrastructure safety situation faces severe challenges. At present, the power civil engineering quality inspection business is market-oriented, and the levels of participating units are uneven, and there are a large number of false report phenomena. As an important link in the acceptance of the foundation project, the function of the third-party inspection has also been greatly reduced. In view of the current safety situation, it is necessary to strengthen the research and application of key technologies for foundation quality control, and promote the improvement of the civil engineering quality of the power transmission and transformation project by technical means to ensure the intrinsic safety of the project.

[0004] As an important part of the existing quality control system, the role of the third-party quality inspection is crucial. How to ensure its independence and quality inspection level is the key; the sonic echo method is the most advanced and reliable non-destructive inspection method for foundation quality at present. During the foundation construction, sonic testing tubes are embedded. Sound waves are transmitted and received between the sonic testing tubes. By measuring the relative changes of acoustic parameters such as the acoustic time, frequency, and amplitude attenuation of the sound waves propagating in the concrete medium, the position, scope, and degree of pile shaft defects are determined. When detecting by the sonic echo method, it is not affected by the pile diameter, pile length, and geological conditions, and the instrument and equipment are relatively easy to carry and can be used under various complex terrain conditions in mountainous areas. However, there are still risks of information being tampered with, intercepted, and leaked in all aspects of information collection, transmission, and storage management. If a comprehensive foundation quality control system and control method are constructed, it is an urgent problem to be solved at present. Summary of the Invention

[0005] The object of the present invention is to provide a quality control system applied to the detection of foundation piles. With the acoustic transmission method as the core, the data collected by the detection equipment is securely controlled through information security transmission technology. The detection process can be tracked in real time, the detection data can be uploaded in real time and encrypted to prevent information from being tampered with, stolen or leaked during data collection, transmission control and other links, ensuring the authenticity and traceability of the data. The on-site image data is used as an encryption means to ensure the randomness and uniqueness of the encryption key.

[0006] To achieve the above technical object, a technical solution provided by the present invention is a quality control system applied to the detection of foundation piles, including: a foundation pile detection terminal, a GPS positioning sensor, a camera device, a foundation pile detection sensor, and a master station control platform;

[0007] The foundation pile detection sensor is used to extend into the acoustic logging tube to obtain the state data of different parts of the foundation pile and is electrically connected to the foundation pile detection terminal;

[0008] The GPS positioning sensor is used to obtain the geographical location information of the foundation pile to be detected currently and is electrically connected to the foundation pile detection terminal;

[0009] The camera device is used to take target images of the survey site and is electrically connected to the foundation pile detection terminal;

[0010] The user of the foundation pile detection sensor processes the obtained state data and establishes communication with the master station control platform;

[0011] The master station control platform is used to collect and control the data of the survey site.

[0012] In this solution, the camera device collects on-site pictures and sends them to the master station control platform. After the master station control platform obtains the on-site pictures, it triggers a detection instruction, and the GPS positioning sensor starts to detect. Among them, image cutting technology and transcoding technology are used to encrypt the state data of each part into the first encrypted data block with the binary code corresponding to the cut fragment image, making the transmitted information difficult to be cracked. After the first encrypted data block is transmitted to the master station control platform, it is decrypted with the binary code corresponding to the corresponding fragment image to obtain the original data. Even if the data is stolen and intercepted during the transmission process, the information is difficult to be cracked and tampered with, ensuring the authenticity of the data source and further improving the effectiveness of quality control; among them, the on-site image data is used as an encryption means to ensure the randomness and uniqueness of the encryption key.

[0013] Preferably, the pile foundation detection terminal includes a first storage unit, a first image segmentation unit, a first image transcoding unit, an encryption unit, and a communication module; the first storage unit stores the geographic coordinate data collected by the GPS positioning sensor, the state data of different parts of the pile foundation collected by the pile foundation detection sensor, and the target image data obtained by the imaging device; the first image segmentation unit obtains the target image data stored in the first storage unit and segments the target image data, and the number of segments is the same as the number of collection points of the pile foundation detection sensor;

[0014] The first image transcoding unit transcodes the segmented target image data into a binary data stream L and converts the obtained state data of different parts of the pile foundation into a binary data stream D;

[0015] The encryption unit is used to perform a first layer of encryption on the state data of different parts of the pile foundation to obtain a first encrypted data block P1, and the first encrypted data block P1 and the geographic coordinate data are subjected to a second layer of encryption by an asymmetric encryption method to obtain a second encrypted data block P2;

[0016] The communication module sends the second encrypted data block P2 and the target image data to the master station control platform respectively.

[0017] Preferably, the master station control platform includes a second storage unit, a second image segmentation unit, a second image transcoding unit, a decoding unit, and a decryption unit;

[0018] The second storage unit stores the second encrypted data block P2 and the target image;

[0019] The second image segmentation unit segments the obtained target image data, and the segmentation method is the same as the processing method of the first image segmentation unit;

[0020] The decryption unit decrypts the obtained second encrypted data block P2 by an asymmetric decryption method to obtain the first encrypted data block P1 and the geographic coordinate data; and performs a second layer of decryption on the first encrypted data block P1 to obtain the binary data stream D of different parts of the pile foundation;

[0021] The decoding unit decodes the binary data stream D to obtain the real data.

[0022] A quality control method applied to pile foundation detection includes the following steps:

[0023] S1. The pile foundation detection terminal establishes a communication connection with the master station control platform;

[0024] S2. The pile foundation detection terminal obtains the geographical location information of the target pile foundation, the target image information of the survey site, and the status data of different parts of the tower foundation collected in real time, and performs double encryption on the obtained data to obtain the second encrypted data block P2, and sends the second encrypted data block P2 to the master station control platform;

[0025] S3. The master station control platform obtains the second encrypted data block P2, and performs double decryption on the second encrypted data block P2 to obtain the original status data of different parts of the pile foundation; if the decryption results in garbled characters, it means that the data has failed, and a report is made and re-collection is performed.

[0026] Preferably, S1 includes the following steps:

[0027] The imaging device takes a target image of the survey site, and the target image data is sent to the master station control platform via the communication module of the pile foundation detection terminal. After receiving the target image, the master station control platform stores it in the second storage unit for filing and sends a detection instruction to the pile foundation detection terminal; after receiving the detection instruction, the pile foundation detection terminal starts to control the pile foundation detection sensor to perform pile foundation detection operations.

[0028] Preferably, S2 includes the following steps:

[0029] S21. The pile foundation detection terminal obtains the geographical coordinate data collected by the GPS positioning sensor and the target image data G obtained by the imaging device and stores them in the first storage unit;

[0030] S22. The first image segmentation unit divides the image into i parts according to any size according to the number i of target pile foundation detection points; recorded as G = [G1, G2, ··· G i ;

[0031] S23. The first image transcoding unit transcodes the segmented image data G to obtain a binary data stream L, cuts the binary data stream into i segments, denoted as L = [L1, L2, ···, L i ; converts the obtained status data of different parts of the pile foundation into a binary data stream D, denoted as D = [D1, D2, ···, D i , where the number of bits of the binary code of L i is greater than the number of bits of the binary code of D i ;

[0032] S4. The encryption unit sequentially obtains the binary data stream D i and the binary data stream L i at the corresponding bits, performs exclusive OR operations bit by bit, and pads with zeros for insufficient bits to obtain the first encrypted data block P1;

[0033] S5. The first encrypted data block P1 and the geographical coordinate data are encrypted at the second layer by means of asymmetric encryption to obtain the second encrypted data block P2; The second encrypted data block P2 is sequentially sent to the master station control platform through the communication module.

[0034] Preferably, S3 includes the following steps:

[0035] S31. The master station control platform stores the received target image data and the second encrypted data block P2 in the second storage unit; S32. The decryption unit decrypts the second encrypted data block P2 by means of asymmetric decoding to obtain the first encrypted data block P1; S33. The second image segmentation unit segments the image in the manner of S22; the segmented image data G = [G1, G2, ··· G i ;

[0036] S34. The second image transcoding unit transcodes the segmented image data G according to S23 to obtain the binary data stream L,

[0037] S35. The decryption unit obtains the binary data stream L and performs an exclusive OR operation on the first encrypted data block P1 bit by bit to obtain the binary data stream D representing the state data of different parts of the foundation pile. If a string of garbled characters is obtained, a report is made and step S1 is executed again; S36. The decoding unit decodes the binary data stream D to obtain the real data.

[0038] Advantages of the present invention: A quality control system and method for foundation pile detection according to the present invention collect on-site pictures through a camera device and send them to the master station control platform. After the master station control platform obtains the on-site pictures, a detection instruction is triggered, and the GPS positioning sensor starts to detect. Among them, image cutting technology and transcoding technology are adopted to encrypt the state data of each part with the binary code corresponding to the cut fragment image into the first encrypted data block, making the transmitted information difficult to be cracked. After the first encrypted data block is transmitted to the master station control platform, it is decrypted through the binary code corresponding to the corresponding fragment image to obtain the original data. Even if the data is stolen and intercepted during the transmission process, the information is difficult to be cracked and tampered with, ensuring the authenticity and traceability of the data source and further improving the effectiveness of quality control; among them, on-site image data is used as a means of encryption, ensuring the randomness and uniqueness of the encryption key. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a schematic structural diagram of a quality control system for foundation pile detection according to the present invention.

[0040] Figure 2 It is a flowchart of a quality control method for foundation pile detection according to the present invention.

[0041] Explanation of the markings in the figure: 11 - GPS positioning sensor, 12 - camera device, 13 - pile foundation detection sensor, 2 - pile foundation detection terminal, 21 - first storage unit, 22 - first image segmentation unit, 23 - first image transcoding unit, 24 - encryption unit, 25 - communication module, 3 - master station control platform, 31 - second storage unit, 32 - second image segmentation unit, 33 - second image transcoding unit, 34 - decoding unit, 35 - decryption unit. Specific implementation mode

[0042] To make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific implementation mode described herein is only one of the best embodiments of the present invention, which is only used to explain the present invention and does not limit the protection scope of the present invention. All other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0043] Embodiment: As Figure 1 shown, a structural schematic diagram of a quality control system applied to pile foundation detection, which is composed of a pile foundation detection terminal 2, a GPS positioning sensor 11, a camera device 12, a pile foundation detection sensor 13, and a master station control platform 3;

[0044] The pile foundation detection sensor is used to extend into the acoustic logging tube to obtain the state data of different parts of the pile foundation and is electrically connected to the pile foundation detection terminal;

[0045] The GPS positioning sensor is used to obtain the geographical location information of the pile foundation to be detected currently and is electrically connected to the pile foundation detection terminal;

[0046] The camera device is used to take the target image of the survey site and is electrically connected to the pile foundation detection terminal;

[0047] The pile foundation detection sensor user processes the obtained state data and establishes communication with the master station control platform;

[0048] The master station control platform is used to collect and control the data of the survey site.

[0049] In this embodiment, the imaging device captures on-site pictures and sends them to the master station control platform. After the master station control platform obtains the on-site pictures, it triggers a detection instruction, and the GPS positioning sensor starts to detect. Among them, image cutting technology and transcoding technology are adopted to encrypt the status data of each part into the first encrypted data block with the binary code corresponding to the cut fragment image, making the transmitted information difficult to be cracked. After the first encrypted data block is transmitted to the master station control platform, it is decrypted through the binary code corresponding to the corresponding fragment image to obtain the original data. Even if the data is stolen and intercepted during the transmission process, the information is difficult to be cracked and tampered with, ensuring the authenticity of the data source and further improving the effectiveness of quality control; among them, the on-site image data is used as an encryption means to ensure the randomness and uniqueness of the encryption key.

[0050] The pile foundation detection terminal includes a first storage unit 21, a first image segmentation unit 22, a first image transcoding unit 23, an encryption unit 24, and a communication module 25; the first storage unit stores the geographical coordinate data collected by the GPS positioning sensor, the status data of different parts of the pile foundation collected by the pile foundation detection sensor, and the target image data obtained by the imaging device;

[0051] The first image segmentation unit obtains the target image data stored in the first storage unit and segments the target image data, and the number of segments is the same as the number of collection points of the pile foundation detection sensor;

[0052] The first image transcoding unit transcodes the segmented target image data into a binary data stream L and converts the obtained status data of different parts of the pile foundation into a binary data stream D;

[0053] The encryption unit is used to perform a first layer of encryption on the status data of different parts of the pile foundation to obtain the first encrypted data block P1, and the first encrypted data block P1 and the geographical coordinate data are subjected to a second layer of encryption through an asymmetric encryption means to obtain the second encrypted data block P2;

[0054] The communication module sends the second encrypted data block P2 and the target image data to the master station control platform respectively.

[0055] The master station control platform includes a second storage unit 31, a second image segmentation unit 32, a second image transcoding unit 33, a decoding unit 34, and a decryption unit 35;

[0056] The second storage unit stores the second encrypted data block P2 and the target image;

[0057] The second image segmentation unit segments the obtained target image data, and the segmentation method is the same as the processing method of the first image segmentation unit;

[0058] The decryption unit decrypts the obtained second encrypted data block P2 by means of asymmetric decryption to obtain the first encrypted data block P1 and the geographic coordinate data; the first encrypted data block P1 is decrypted at two levels to obtain the binary data stream D of different parts of the pile foundation;

[0059] The decoding unit decodes the binary data stream D to obtain the real data.

[0060] As Figure 2 shown, a flowchart of a quality control method applied to pile foundation detection includes the following steps:

[0061] S1. The pile foundation detection terminal establishes a communication connection with the master station control platform;

[0062] S1 includes the following steps:

[0063] The camera device takes a target image of the survey site, and the target image data is sent to the master station control platform via the communication module of the pile foundation detection terminal. After receiving the target image, the master station control platform stores it in the second storage unit for filing and sends a detection instruction to the pile foundation detection terminal; after receiving the detection instruction, the pile foundation detection terminal starts to control the pile foundation detection sensor to perform the pile foundation detection operation.

[0064] S2. The pile foundation detection terminal obtains the geographical location information of the target pile foundation, the target image information of the survey site, and the status data of different parts of the tower foundation collected in real time, and after double encryption of the obtained data, obtains the second encrypted data block P2, and sends the second encrypted data block P2 to the master station control platform;

[0065] S2 includes the following steps:

[0066] S21. The pile foundation detection terminal obtains the geographical coordinate data collected by the GPS positioning sensor and the target image data G obtained by the camera device and stores them in the first storage unit;

[0067] S22. The first image segmentation unit divides the image into i parts according to any size according to the number i of target pile foundation detection points; recorded as G = [G1, G2, ··· G i ;

[0068] S23. The first image transcoding unit transcodes the segmented image data G to obtain the binary data stream L, cuts the binary data stream into i segments, denoted as L = [L1, L2, ···, L i ; converts the obtained status data of different parts of the pile foundation into the binary data stream D, denoted as D = [D1, D2, ···, D i , where the number of bits of the binary code of L i is greater than the number of bits of the binary code of D i ;

[0069] S4, the encryption unit obtains the binary data stream D in sequence i and the binary data stream L on the corresponding bit i , perform bit-by-bit XOR operations on each of them, and fill in zeros if the number of bits is insufficient, to obtain the first encrypted data block P1;

[0070] S5, the first encrypted data block P1 and the geographic coordinate data are encrypted in two layers by asymmetric encryption to obtain a second encrypted data block P2; The second encrypted data block P2 is sent to the main station management and control platform in sequence through the communication module.

[0071] S3. The main station control platform obtains the second encrypted data block P2, and double-decrypts the second encrypted data block P2 to obtain the original status data of different parts of the foundation pile; if garbled characters appear in the decryption, it means that the data has failed, and it is reported and collected again.

[0072] S3 includes the following steps:

[0073] S31, the main station control platform stores the received target image data and the second encrypted data block P2 in the second storage unit;

[0074] S32, the decryption unit decrypts the second encrypted data block P2 by an asymmetric decoding method to obtain the first encrypted data block P1;

[0075] S33, the second image segmentation unit segments the image according to the method of S22; obtain the segmented image data G=[G1,G2,···G i ];

[0076] S34, the second image transcoding unit transcodes the segmented image data G according to S23 to obtain a binary data stream L,

[0077] S35, the decryption unit obtains the binary data stream L and performs an XOR operation on the first encrypted data block P1 bit by bit to obtain a binary data stream D representing the status data of different parts of the pile. If a string of garbled codes is obtained, a report is made and step S1 is executed again;

[0078] S36. Decode the binary data stream D through a decoding unit to obtain real data.

[0079] The specific implementation described above is a preferred implementation of a quality control system and method for pile foundation testing of the present invention, and is not intended to limit the specific implementation scope of the present invention. The scope of the present invention includes but is not limited to this specific implementation. All equivalent changes made in accordance with the shape and structure of the present invention are within the protection scope of the present invention.

Claims

1. A quality control system applied to the detection of foundation piles, characterized in that: It includes: a pile foundation detection terminal, a GPS positioning sensor, a camera device, a pile foundation detection sensor, and a master station control platform; The pile foundation detection sensor is used to extend into the sonic logging tube to obtain the status data of different parts of the pile foundation and is electrically connected to the pile foundation detection terminal; The GPS positioning sensor is used to obtain the geographical location information of the pile foundation to be detected currently and is electrically connected to the pile foundation detection terminal; The camera device is used to capture the target image of the survey site and is electrically connected to the pile foundation detection terminal; The pile foundation detection sensor is used by the user to process the obtained status data and establish communication with the master station control platform; The master station control platform is used to collect and control the data of the survey site; The pile foundation detection terminal includes a first storage unit, a first image segmentation unit, a first image transcoding unit, an encryption unit, and a communication module; the first storage unit stores the geographical coordinate data collected by the GPS positioning sensor, the status data of different parts of the pile foundation collected by the pile foundation detection sensor, and the target image data obtained by the camera device; The first image segmentation unit obtains the target image data stored in the first storage unit and segments the target image data, and the number of segments is the same as the number of collection points of the pile foundation detection sensor; The first image transcoding unit transcodes the segmented target image data into a binary data stream L and converts the obtained status data of different parts of the pile foundation into a binary data stream D; The encryption unit is used to perform a first layer of encryption on the status data of different parts of the pile foundation to obtain a first encrypted data block P1, and the first encrypted data block P1 and the geographical coordinate data are subjected to a second layer of encryption by an asymmetric encryption method to obtain a second encrypted data block P2; The communication module sends the second encrypted data block P2 and the target image data to the master station control platform respectively.

2. The quality control system for pile foundation detection according to claim 1, characterized in that: The master station control platform includes a second storage unit, a second image segmentation unit, a second image transcoding unit, a decoding unit, and a decryption unit; The second storage unit stores the second encrypted data block P2 and the target image data; The second image segmentation unit segments the obtained target image data, and the segmentation method is the same as the processing method of the first image segmentation unit; The decryption unit decrypts the obtained second encrypted data block P2 by an asymmetric decryption method to obtain the first encrypted data block P1 and the geographical coordinate data; perform a second layer of decryption on the first encrypted data block P1 to obtain the binary data stream D of different parts of the pile foundation; The decoding unit decodes the binary data stream D to obtain the real data.

3. A quality control method applied to the detection of foundation piles, characterized in that; It includes the following steps: S1. The pile foundation detection terminal establishes a communication connection with the master station control platform; S2. The pile foundation detection terminal obtains the geographical location information of the target pile foundation, the target image information of the survey site, and the status data of different parts of the tower foundation collected in real time, and performs double encryption on the obtained data to obtain a second encrypted data block P2, and sends the second encrypted data block P2 to the master station control platform; S3. The master station control platform obtains the second encrypted data block P2, and performs double decryption on the second encrypted data block P2 to obtain the original state data of different parts of the foundation pile; if garbled characters appear during decryption, it indicates that a data failure has occurred, and a report is made and data collection is performed again. S2 includes the following steps: S21. The foundation pile detection terminal obtains the geographical coordinate data collected by the GPS positioning sensor and the target image data G obtained by the imaging device and stores them in the first storage unit. S22. The first image segmentation unit divides the image into i parts of any size according to the number i of target pile detection points; recorded as G = [G1, G2, ··· G i ; S23. The first image transcoding unit transcodes the segmented image data G to obtain a binary data stream L, and cuts the binary data stream into i segments, denoted as L = [L1, L2, ···, L i ; Convert the status data of different parts of the pile foundation obtained into a binary data stream D, denoted as D = [D1, D2, ···, D i , where the number of bits of the binary code of L i is greater than the number of bits of the binary code of D i ; S4. The encryption unit sequentially obtains the binary data stream D i and the binary data stream L at the corresponding bit i , and performs an exclusive OR operation bit by bit. If the number of bits is insufficient, zeros are padded to obtain the first encrypted data block P1; P1 = [(L1⊕D1), (L2⊕D3), ···, (L i ⊕D i )]; S5. The first encrypted data block P1 and the geographical coordinate data are encrypted at the second layer by means of asymmetric encryption to obtain the second encrypted data block P2; P2 = [(d, L1⊕D1), (d, L2⊕D2), ···, (d, L i ⊕D i )]; The second encrypted data block P2 is sequentially sent to the master station control platform through the communication module.

4. A quality control method applied to the detection of foundation piles according to claim 3, characterized in that ； S1 includes the following steps: The imaging device takes a target image of the survey site, and the target image data is sent to the master station control platform via the communication module of the foundation pile detection terminal. After receiving the target image, the master station control platform stores it in the second storage unit for filing and sends a detection instruction to the foundation pile detection terminal; after receiving the detection instruction, the foundation pile detection terminal starts to control the foundation pile detection sensor to perform the foundation pile detection operation.

5. The quality control method for pile foundation inspection according to claim 3, wherein ； S3 includes the following steps: S31. The master station control platform stores the received target image data and the second encrypted data block P2 in the second storage unit. S32. The decryption unit decrypts the second encrypted data block P2 by means of asymmetric decoding to obtain the first encrypted data block P1. S33. The second image segmentation unit segments the image in the same way as in S22; the segmented image data G = [G1, G2, ··· G i ; S34. The second image transcoding unit transcodes the segmented image data G according to S23 to obtain the binary data stream L. S35. The decryption unit obtains the binary data stream L and performs an exclusive OR operation on the first encrypted data block P1 bit by bit to obtain the binary data stream D representing the state data of different parts of the foundation pile. If a string of garbled characters is obtained, a report is made and step S1 is executed again. S36. The decoding unit decodes the binary data stream D to obtain the real data.

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