Method and system for identifying and managing path of underground pipeline guided by ground identifier

Abstract

The invention discloses a method and a system for identifying and managing a path of an underground pipeline guided by a ground identifier, and relates to the technical field of underground pipeline record processing. The method comprises the following steps of: acquiring longitude and latitude information by using a GNSS (Global Navigation Satellite System) measurement technology when a positioning instrument is positioned right above an underground pipeline marking point, encrypting the longitude and latitude information of the underground pipeline marking point and pipeline attribute information by communicating a first handheld terminal with a password server, and writing the encrypted information into a passive electronic tag positioned in a ground marking nail; and a second handheld terminal scans the passive electronic tag of the ground marking nail to obtain encrypted data, and communicates with the password server to realize decryption and restoration to obtain latitude and longitude information of the underground pipeline marking point and pipeline attribute information. And finally, the second handheld terminal draws an underground pipeline path diagram according to the latitude and longitude information of the plurality of underground pipeline mark points in the target area and the pipeline attribute information, and outputs and displays the underground pipeline path diagram, so that operation and maintenance patrol can be powerfully assisted, and information safety and city safety can be guaranteed.

Description

Technical Field

[0001] The present invention belongs to the technical field of underground pipeline record processing, and in particular relates to a method and system for managing the path identification of underground pipelines guided by ground markings. Background Art

[0002] With the rapid development of urban construction, the laying of urban underground pipelines has become more and more complicated. Various buried pipelines such as gas, heat, tap water and communications are often laid in an interlaced manner, which brings great difficulties to the inspection and leak detection of operation and maintenance personnel. For example: there is no electronic positioning map for old pipelines, which makes it difficult to find them during inspections and faults cannot be located in time; various professional pipelines are cross-distributed, making them difficult to identify and find; cross-construction briefings and docking data are more troublesome; and so on.

[0003] At present, traditional signboards and ground nails can only indicate the location of pipelines, but cannot provide detailed information such as pipeline direction, pipeline material and buried depth to operation and maintenance personnel. At the same time, the staggered underground pipelines are still managed in the traditional way, which will bring hidden dangers to the safety of the city, among which the safety of gas pipelines is particularly important. Therefore, how to provide a safe digital identification and management solution for underground pipeline paths to assist operation and maintenance personnel in inspections and leak detection, and accurately guide excavation construction operations, is a topic that technicians in this field urgently need to study. Summary of the invention

[0004] The purpose of the present invention is to provide a method and system for identifying and managing underground pipeline paths using ground marking guidance, so as to solve the problems of insufficient indication information and lack of effective protection for information security and urban safety in existing signboards, ground nails and underground pipeline management solutions.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: In a first aspect, a method for managing underground pipeline path identification guided by ground markings is provided, comprising: When the locator is directly above the first underground pipeline marking point, the locator uses GNSS measurement technology to obtain the latitude and longitude information of the first underground pipeline marking point, and transmits the obtained result to the first handheld terminal; After receiving the longitude and latitude information of the first underground pipeline marking point and manually entering the pipeline attribute information of the first underground pipeline marking point, the first handheld terminal communicates with the cryptographic server to encrypt the longitude and latitude information and pipeline attribute information of the first underground pipeline marking point to obtain first encrypted data; The first handheld terminal writes the first encrypted data into a passive electronic tag located inside a first ground identification nail through a writer, wherein the writer is integrated on the first handheld terminal, and the first ground identification nail is used to be nailed at intervals just above the first underground pipeline marking point; The second handheld terminal scans the passive electronic tag of the first ground marking nail through the second reader to obtain the first encrypted data, wherein the second reader is integrated on the second handheld terminal; The second handheld terminal communicates with the password server to decrypt the first encrypted data, and the longitude and latitude information and pipeline attribute information of the first underground pipeline marking point are restored; The second handheld terminal draws the underground pipeline path map of the target area according to the longitude and latitude information and pipeline attribute information of multiple underground pipeline marking points in the target area and outputs and displays it.

[0006] Based on the above invention content, a new digital security identification and management solution for underground pipeline paths is provided. That is, when the locator is directly above the underground pipeline marking point, the GNSS measurement technology is used to obtain the longitude and latitude information. The first handheld terminal communicates with the password server to encrypt the longitude and latitude information and pipeline attribute information of the underground pipeline marking point and write them into the passive electronic tag inside the ground marking nail. The second handheld terminal scans the passive electronic tag of the ground marking nail to obtain the encrypted data, and communicates with the password server to decrypt it, restoring the longitude and latitude information and pipeline attribute information of the underground pipeline marking point. Finally, the second handheld terminal draws the underground pipeline path map according to the longitude and latitude information and pipeline attribute information of multiple underground pipeline marking points in the target area and outputs and displays it. In this way, it can not only effectively assist the inspection and leakage detection work of maintenance personnel and accurately guide the excavation construction operation, but also effectively guarantee information security and urban security, facilitating practical application and promotion.

[0007] In a possible design, the pipeline attribute information includes pipeline burial depth, pipeline diameter, pipeline material, pipeline flow direction, pipeline type, pipeline project number to which it belongs, and / or reading permission.

[0008] In a possible design, after the first handheld terminal receives the longitude and latitude information of the first underground pipeline marking point and manually enters the pipeline attribute information of the first underground pipeline marking point, it communicates with the password server to encrypt the longitude and latitude information and pipeline attribute information of the first underground pipeline marking point to obtain the first encrypted data, including: After the first handheld terminal receives the longitude and latitude information of the first underground pipeline marking point and manually enters the pipeline attribute information of the first underground pipeline marking point, it communicates with the password server to establish a first session; The first session key, which is applied in the first session and is a symmetric key, is used by the first handheld terminal to encrypt the longitude and latitude information and pipeline attribute information of the first underground pipeline marking point to obtain a first ciphertext, and the public key of the password server is used to encrypt the first session key to obtain a second ciphertext. Then, the first ciphertext and the second ciphertext are transmitted to the password server together through the first session; The password server uses its local private key to decrypt the received second ciphertext to restore the first session key, and then uses the first session key to decrypt the received first ciphertext to restore the longitude and latitude information and pipeline attribute information of the first underground pipeline marking point; The password server randomly generates a pair of asymmetric keys for the first underground pipeline marking point, and uses the public key in the asymmetric keys to encrypt the longitude and latitude information and pipeline attribute information of the first underground pipeline marking point to obtain a third ciphertext. Then, the third ciphertext is transmitted to the first handheld terminal through the first session, and the private key in the asymmetric keys is stored in the local key library for decryption use; The first handheld terminal takes the received third ciphertext as the first encrypted data obtained by encrypting the longitude and latitude information and pipeline attribute information of the first underground pipeline marking point.

[0009] In a possible design, the second handheld terminal communicates with the password server to decrypt the first encrypted data and restore the longitude and latitude information and pipeline attribute information of the first underground pipeline marking point, including: The second handheld terminal communicates with the password server to establish a second session; The second handheld terminal transmits the first encrypted data to the password server through the second session; The password server retrieves the private key generated for the first underground pipeline marking point from the local key library and uses the private key to decrypt the first encrypted data to restore the longitude and latitude information and pipeline attribute information of the first underground pipeline marking point; The password server uses the second session key, which is applied in the second session and is a symmetric key, to encrypt the longitude and latitude information and pipeline attribute information of the first underground pipeline marking point restored most recently to obtain a fourth ciphertext, and uses the public key of the second handheld terminal to encrypt the second session key to obtain a fifth ciphertext. Then, the fourth ciphertext and the fifth ciphertext are transmitted to the second handheld terminal together through the second session; The second handheld terminal uses the local private key to decrypt the received fifth ciphertext to restore the second session key, and then uses the second session key to decrypt the received fourth ciphertext to restore the longitude and latitude information and pipeline attribute information of the first underground pipeline marking point.

[0010] In a possible design, when the pipeline attribute information includes a reading permission, the password server uses the second session key, which is applied in the second session and is a symmetric key, to encrypt the longitude and latitude information and pipeline attribute information of the first underground pipeline marking point recently restored, to obtain a fourth ciphertext, including: The password server obtains the reading permission of the second handheld terminal through the second session; The password server determines whether the reading permission of the second handheld terminal reaches the reading permission in the pipeline attribute information according to the pipeline attribute information of the first underground pipeline marking point recently restored. If so, the password server uses the second session key, which is applied in the second session and is a symmetric key, to encrypt the longitude and latitude information and pipeline attribute information of the first underground pipeline marking point recently restored, to obtain a fourth ciphertext. Otherwise, the decryption of the first encrypted data is terminated, and a reading failure reminder message indicating no reading permission is fed back to the second handheld terminal through the second session.

[0011] In a possible design, the first handheld terminal writes the first encrypted data into a passive electronic tag inside the first ground marking nail through a writer, including: The first handheld terminal transmits the first encrypted data and the password to be verified to a passive electronic tag inside the first ground marking nail through a writer, where the writer is integrated on the first handheld terminal, and the first ground marking nail is used to be nailed at intervals directly above the first underground pipeline marking point; The passive electronic tag verifies whether the local access password is consistent with the password to be verified. If so, the first encrypted data is written into the local storage area.

[0012] In a possible design, the first handheld terminal writes the first encrypted data into a passive electronic tag inside the first ground marking nail through a writer, including: The first handheld terminal scans the passive electronic tag of the second ground marking nail through the first reader to obtain second encrypted data, where the first reader is integrated on the first handheld terminal, and the second ground marking nail is used to be nailed at intervals directly above the second underground pipeline marking point, and the second underground pipeline marking point refers to other underground pipeline marking points located in the upstream direction or downstream direction of the pipeline of the first underground pipeline marking point; The first handheld terminal uses a hash algorithm to perform hash processing on the first encrypted data to obtain a first hash value, and uses the hash algorithm to perform hash processing on the second encrypted data to obtain a second hash value; The first handheld terminal writes the first encrypted data and the second hash value into the passive electronic tag inside the first ground marking nail through a writer, and also writes the second encrypted data and the first hash value into the passive electronic tag of the second ground marking nail in a refreshing manner, where the writer is integrated on the first handheld terminal, and the first ground marking nail is used to be nailed at intervals directly above the first underground pipeline marking point.

[0013] In a possible design, the second handheld terminal scans the passive electronic tag of the first ground marking nail through the second reader to obtain the first encrypted data, including: The second handheld terminal scans the passive electronic tag of the second ground marking nail through the second reader to obtain the first hash value, where the second reader is integrated on the second handheld terminal; The second handheld terminal scans the passive electronic tag of the first ground marking nail through the second reader to obtain the encrypted data to be verified, and uses the hash algorithm to perform hash processing on the encrypted data to be verified to obtain a third hash value; The second handheld terminal verifies whether the third hash value is consistent with the first hash value. If so, the encrypted data to be verified is used as the first encrypted data. Otherwise, a data tampering reminder message is output for the first underground pipeline marking point.

[0014] In a possible design, when the second underground pipeline marking point refers to other underground pipeline marking points located in the upstream direction or downstream direction of the pipeline of the first underground pipeline marking point and adjacent to the first underground pipeline marking point, the method further includes: When the second handheld terminal verifies that the third hash value is inconsistent with the first hash value, it restores and reproduces the longitude and latitude information and pipeline attribute information of the first underground pipeline marking point according to the longitude and latitude information and pipeline attribute information of multiple other underground pipeline marking points located in the upstream direction and / or downstream direction of the pipeline of the first underground pipeline marking point.

[0015] In a second aspect, a ground marking guiding underground pipeline path identification and management system is provided, including a locator, a first handheld terminal, a second handheld terminal, a password server, a first ground marking nail and a passive electronic tag. Among them, a writer is integrated on the first handheld terminal, and a second reader is integrated on the second handheld terminal; The locator is used to obtain the longitude and latitude information of the first underground pipeline marking point by using GNSS measurement technology when it is directly above the first underground pipeline marking point, and transmit the obtained result to the first handheld terminal; The first handheld terminal is used to communicate with the password server to encrypt the longitude and latitude information and pipeline attribute information of the first underground pipeline marking point after receiving the longitude and latitude information of the first underground pipeline marking point and manually inputting the pipeline attribute information of the first underground pipeline marking point, so as to obtain first encrypted data; The first handheld terminal is further used to write the first encrypted data into the passive electronic tag inside the first ground marking nail through the writer, where the first ground marking nail is used to be nailed at intervals directly above the first underground pipeline marking point; The second handheld terminal is used to scan the passive electronic tag of the first ground marking nail through the second reader to obtain the first encrypted data; The second handheld terminal is further used to communicate with the password server to decrypt the first encrypted data and restore the longitude and latitude information and pipeline attribute information of the first underground pipeline marking point; The second handheld terminal is further used to draw the underground pipeline path map of the target area according to the longitude and latitude information and pipeline attribute information of multiple underground pipeline marking points in the target area and output and display it.

[0016] Advantages of the above solution: The present invention provides a new digital security identification and management solution for underground pipeline paths. That is, when the locator is directly above the underground pipeline marking point, the GNSS measurement technology is used to obtain longitude and latitude information. The first handheld terminal communicates with the password server to encrypt the longitude and latitude information of the underground pipeline marking point and the pipeline attribute information, and write them into the passive electronic tag inside the ground identification nail. The second handheld terminal scans the passive electronic tag of the ground identification nail to obtain the encrypted data, and communicates with the password server to decrypt it, restoring the longitude and latitude information of the underground pipeline marking point and the pipeline attribute information. Finally, the second handheld terminal draws and outputs a display of the underground pipeline path map based on the longitude and latitude information and pipeline attribute information of multiple underground pipeline marking points in the target area. In this way, it can not only effectively assist the inspection and leakage detection work of maintenance personnel and accurately guide the excavation construction operation, but also effectively ensure information security and urban security, which is convenient for practical application and promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0018] Figure 1 It is a schematic flow chart of the method for identifying and managing the underground pipeline path guided by the ground identification provided in the embodiment of the present application.

[0019] Figure 2 It is the first example diagram of the underground pipeline path map provided in the embodiment of the present application.

[0020] Figure 3 It is the second example diagram of the underground pipeline path map provided in the embodiment of the present application.

[0021] Figure 4 It is a schematic structural diagram of the system for identifying and managing the underground pipeline path guided by the ground identification provided in the embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the present invention in combination with the drawings and the description of the embodiments or the prior art. Obviously, the following description of the structure of the drawings is only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other embodiments can be obtained based on these embodiments. It should be noted here that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation to the present invention.

[0023] It should be understood that although terms such as first and second may be used herein to describe various objects, these objects should not be limited by these terms. These terms are only used to distinguish one object from another. For example, the first object may be referred to as the second object, and similarly, the second object may be referred to as the first object, without departing from the scope of the exemplary embodiments of the present invention.

[0024] It should be understood that for the term "and / or" that may appear herein, it is merely a description of the association relationship between associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, B exists alone, or A and B exist simultaneously; for another example, A, B, and / or C can represent any one of A, B, and C or any combination thereof; for the term " / and" that may appear herein, it is a description of another association relationship between associated objects, indicating that there can be two relationships. For example, A / and B can represent: A exists alone or A and B exist simultaneously; in addition, for the character " / " that may appear herein, generally it represents that the associated objects before and after are in an "or" relationship.

[0025] Embodiment 1 As Figure 1 shown, the ground marking guiding underground pipeline path identification and management method provided in this embodiment can, but is not limited to, be interactively executed by a locator, a first handheld terminal, a second handheld terminal, a password server, a passive electronic tag, etc. in the ground marking guiding underground pipeline path identification and management system as Figure 4 shown, and specifically includes, but is not limited to, the following steps S1 to S6.

[0026] S1. When the locator is directly above the first underground pipeline marking point, the GNSS measurement technology is used to obtain the longitude and latitude information of the first underground pipeline marking point, and the obtained result is transmitted to the first handheld terminal.

[0027] In the step S1, the first underground pipeline marking point can be, but is not limited to, the marking point of professional underground pipelines such as gas, heat, tap water or communication, etc., which can be preset according to the needs of operation and maintenance management. The GNSS (Global Navigation Satellite System) measurement technology is an existing technology, that is, the locator can be, but is not limited to, realized by using an existing Beidou PTK (Real-time kinematic) high-precision locator, so that the longitude and latitude information has a high precision at the centimeter level. The first handheld terminal is an electronic device held by operation and maintenance management personnel, such as a smart phone or a tablet computer, etc. In addition, the specific transmission method of the longitude and latitude information can be, but is not limited to, realized by using existing wireless communication technologies such as WiFi or Bluetooth, etc.

[0028] S2. After the first handheld terminal receives the longitude and latitude information of the first underground pipeline marking point and manually enters the pipeline attribute information of the first underground pipeline marking point, it communicates with the password server to encrypt the longitude and latitude information and the pipeline attribute information of the first underground pipeline marking point, and obtains the first encrypted data.

[0029] In the step S2, specifically, the pipeline attribute information includes, but is not limited to, pipeline burial depth, pipeline diameter, pipeline material, pipeline flow direction, pipeline type, pipeline project number and / or reading permission, etc. The purpose of the foregoing encryption is to ensure the information security in the subsequent passive electronic tag. Among them, the password server is used to manage the secure generation, distribution, application, storage and destruction of keys for encryption and decryption, etc., and can specifically be, but is not limited to, empowered by using existing national cryptography algorithms (that is, specifically, there are SM1 algorithm, SM2 algorithm, SM3 algorithm and SM4 algorithm, etc.). In order to ensure the information security during the data encryption process, preferably, after the first handheld terminal receives the longitude and latitude information of the first underground pipeline marking point and manually enters the pipeline attribute information of the first underground pipeline marking point, it communicates with the password server to encrypt the longitude and latitude information and the pipeline attribute information of the first underground pipeline marking point, and obtains the first encrypted data, including but not limited to the following steps S21 to S25.

[0030] S21. After the first handheld terminal receives the longitude and latitude information of the first underground pipeline marking point and manually enters the pipeline attribute information of the first underground pipeline marking point, it communicates with the password server to establish a first session.

[0031] In the step S21, the specific establishment process of the first session can be routinely implemented based on the existing SIP (Session Initialization Protocol), and will not be elaborated here.

[0032] S22. The first handheld terminal uses the first session key, which is a symmetric key applied in the first session, to encrypt the longitude and latitude information and pipeline attribute information of the first underground pipeline marking point to obtain a first ciphertext, and uses the public key of the password server to encrypt the first session key to obtain a second ciphertext, and then transmits the first ciphertext and the second ciphertext to the password server together through the first session.

[0033] In the step S22, the public key of the password server is pre-transmitted and stored in the secure and trusted module of the first handheld terminal based on the existing security mechanism.

[0034] S23. The password server uses the local private key to decrypt the received second ciphertext to restore the first session key, and then uses the first session key to decrypt the received first ciphertext to restore the longitude and latitude information and pipeline attribute information of the first underground pipeline marking point.

[0035] S24. The password server randomly generates a pair of asymmetric keys for the first underground pipeline marking point, and uses the public key in the asymmetric keys to encrypt the longitude and latitude information and pipeline attribute information of the first underground pipeline marking point to obtain a third ciphertext, and then transmits the third ciphertext to the first handheld terminal through the first session, and stores the private key in the asymmetric keys in the local key library for decryption use.

[0036] In the step S24, the random generation process of the asymmetric keys can be routinely implemented based on the existing pseudo-random algorithm. To facilitate subsequent finding of the private key generated for the first underground pipeline marking point in the key library, the unique identifier of the first underground pipeline marking point (specifically, the unique identifier obtained by scanning the passive electronic tag of the subsequent first ground marking nail by the subsequent second reader can be used as the unique identifier of the first underground pipeline marking point, and this unique identifier can be encrypted in the first ciphertext together with the longitude and latitude information and pipeline attribute information of the first underground pipeline marking point to be securely transmitted from the first handheld terminal to the password server) can be bound and stored in the key library with the private key.

[0037] S25. The first handheld terminal uses the received third ciphertext as the first encrypted data obtained by encrypting the longitude and latitude information and pipeline attribute information of the first underground pipeline marking point.

[0038] S3. The first handheld terminal writes the first encrypted data into a passive electronic tag located inside the first ground identification nail through a writer, where the writer is integrated on the first handheld terminal, and the first ground identification nail is used to be nailed at intervals directly above the first underground pipeline marking point.

[0039] In step S3, the first ground identification nail can adopt the structure of a traditional sign ground nail, and by way of example but not limited to, has the following design parameters: the diameter of the top plate is 100 mm, the length of the nail rod is 100 mm, and the material of the nail body is 206 stainless steel; the first ground identification nail can be specifically nailed at intervals directly above the first underground pipeline marking point in a traditional manner. The passive electronic tag can specifically be implemented by, but not limited to, using an existing passive ultra-high frequency RFID (Radio Frequency Identification) tag, and by way of example but not limited to, has the following design parameters: the reading distance is less than 1000 mm, the data storage capacity is 64 bytes, and the designed service life is more than 20 years. The writer can also specifically be implemented by using an existing RFID reader, and by way of example but not limited to, has the following design parameters: the reading and writing time is less than 100 milliseconds, and the moving speed of the reader during reading and writing is less than 40 kilometers per hour. To ensure the legality of writing data into the tag, preferably, the first handheld terminal writes the first encrypted data into a passive electronic tag located inside the first ground identification nail through a writer, including but not limited to the following steps: the first handheld terminal transmits the first encrypted data and the password to be verified to a passive electronic tag located inside the first ground identification nail through a writer, where the writer is integrated on the first handheld terminal, and the first ground identification nail is used to be nailed at intervals directly above the first underground pipeline marking point; the passive electronic tag verifies whether the local access password is consistent with the password to be verified, and if so, writes the first encrypted data into the local storage area.

[0040] In step S3, to enable the upstream and downstream tags to have the ability to mutually verify the encrypted data in the tag to prevent data tampering, preferably, the first handheld terminal writes the first encrypted data into a passive electronic tag located inside the first ground identification nail through a writer, including but not limited to steps S31 to S33 as follows.

[0041] S31. The first handheld terminal scans the passive electronic tag of the second ground marking nail through the first reader to obtain second encrypted data. Herein, the first reader is integrated on the first handheld terminal, and the second ground marking nail is used to be nailed at intervals directly above the second underground pipeline marking point, and the second underground pipeline marking point refers to other underground pipeline marking points located in the upstream direction or downstream direction of the pipeline of the first underground pipeline marking point.

[0042] In step S31, the first reader can also be specifically implemented by using an existing RFID reader, and by way of example but not limited to, there are the following design parameters: the reading and writing time is less than 100 milliseconds, and the moving speed of the reader during reading and writing is less than 40 kilometers per hour. As Figure 4 shown, if the first underground pipeline marking point is the underground pipeline marking point B (i.e., the first ground marking nail can correspondingly be the ground marking nail B), then the second underground pipeline marking point can be the underground pipeline marking point A, the underground pipeline marking point C, the underground pipeline marking point D, etc., and the second ground marking nail can correspondingly be the ground marking nail A, the ground marking nail C, the ground marking nail D, etc. In order to facilitate the scanning of the passive electronic tag of the second ground marking nail before writing the first encrypted data into the passive electronic tag inside the first ground marking nail, the second underground pipeline marking point preferably refers to other underground pipeline marking points located in the upstream direction or downstream direction of the first underground pipeline marking point and adjacent to the first underground pipeline marking point (i.e., the underground pipeline marking point A or the underground pipeline marking point C). In addition, the second encrypted data can also be pre-written into the passive electronic tag of the second ground marking nail based on the foregoing steps S1 - S3.

[0043] S32. The first handheld terminal uses the hash algorithm to perform hash processing on the first encrypted data to obtain a first hash value, and uses the hash algorithm to perform hash processing on the second encrypted data to obtain a second hash value.

[0044] In step S32, the hash algorithm is an existing algorithm. For example, the MD5 algorithm is adopted, and the specific hash processing process will not be elaborated herein.

[0045] S33. The first handheld terminal writes the first encrypted data and the second hash value into the passive electronic tag inside the first ground marking nail through the writer, and also writes the second encrypted data and the first hash value into the passive electronic tag of the second ground marking nail in a refreshing manner. Herein, the writer is integrated on the first handheld terminal, and the first ground marking nail is used to be nailed at intervals directly above the first underground pipeline marking point.

[0046] In the step S33, since the first encrypted data is written into the passive electronic tag of the first ground identification nail and the first hash value is written into the passive electronic tag of the second ground identification nail, the passive electronic tag of the second ground identification nail has the ability to verify the in-tag encrypted data of the passive electronic tag of the first ground identification nail to determine whether there is data tampering. Similarly, since the second encrypted data is written into the passive electronic tag of the second ground identification nail and the second hash value is written into the passive electronic tag of the first ground identification nail, the passive electronic tag of the first ground identification nail also has the ability to verify the in-tag encrypted data of the passive electronic tag of the second ground identification nail to determine whether there is data tampering. Of course, if only the downstream tag is desired to have the ability to verify the in-tag encrypted data of the upstream tag to prevent data tampering, when the second underground pipeline marking point refers to another underground pipeline marking point located upstream of the pipeline of the first underground pipeline marking point and adjacent to the first underground pipeline marking point, only the first encrypted data and the second hash value are written into the passive electronic tag inside the first ground identification nail (in this case, there is no need to perform hash processing to obtain the first hash value); or if only the upstream tag is desired to have the ability to verify the in-tag encrypted data of the downstream tag to prevent data tampering, when the second underground pipeline marking point refers to another underground pipeline marking point located downstream of the pipeline of the first underground pipeline marking point and adjacent to the first underground pipeline marking point, only the first encrypted data and the second hash value are written into the passive electronic tag inside the first ground identification nail (in this case, there is no need to perform hash processing to obtain the first hash value). In addition, if the unique identifier of the first underground pipeline marking point and the unique identifier of the second underground pipeline marking point can also be obtained (the specific acquisition process is the same as that of the first underground pipeline marking point), the unique identifier of the first underground pipeline marking point can be bound to the first hash value and written into the passive electronic tag of the second ground identification nail, and the unique identifier of the second underground pipeline marking point can be bound to the second hash value and written into the passive electronic tag of the first ground identification nail for subsequent accurate verification.

[0047] S4. The second handheld terminal scans the passive electronic tag of the first ground identification nail through the second reader to obtain the first encrypted data, where the second reader is integrated on the second handheld terminal.

[0048] In step S4, the second handheld terminal is another electronic device such as a smartphone or a tablet computer held by an operation and maintenance management personnel. The second reader can also be specifically implemented by using an existing RFID reader, and by way of example but not limitation, it has the following design parameters: the reading and writing time is less than 100 milliseconds, and the moving speed of the reader during reading and writing is less than 40 kilometers per hour. To verify the encrypted data in the passive electronic tag of the first ground marking nail by the passive electronic tag of the second ground marking nail to determine whether there is data tampering, preferably, the second handheld terminal scans the passive electronic tag of the first ground marking nail through the second reader to obtain the first encrypted data, including but not limited to the following steps S41 to S43.

[0049] S41. The second handheld terminal scans the passive electronic tag of the second ground marking nail through the second reader to obtain the first hash value, wherein the second reader is integrated on the second handheld terminal.

[0050] In step S41, when scanning the passive electronic tag of the second ground marking nail, the second encrypted data will of course also be obtained, but since it is temporarily useless, it is not recorded. In addition, if the unique identifier of the first underground pipeline marking point is bound to the first hash value and written into the passive electronic tag of the second ground marking nail, the unique identifier of the first underground pipeline marking point can also be scanned.

[0051] S42. The second handheld terminal scans the passive electronic tag of the first ground marking nail through the second reader to obtain the encrypted data to be verified, and performs hash processing on the encrypted data to be verified by using the hash algorithm to obtain a third hash value.

[0052] In step S42, if the first encrypted data and the second hash value are written into the passive electronic tag inside the first ground marking nail, the second hash value can also be obtained. In addition, if the unique identifier of the second underground pipeline marking point is bound to the second hash value and written into the passive electronic tag of the first ground marking nail, the unique identifier of the second underground pipeline marking point can also be scanned.

[0053] S43. The second handheld terminal verifies whether the third hash value is consistent with the first hash value. If so, the encrypted data to be verified is used as the first encrypted data; otherwise, a data tampering reminder message is output for the first underground pipeline marking point.

[0054] In the step S43, for the purpose of achieving accurate verification, preferably, verifying whether the third hash value is consistent with the first hash value includes, but is not limited to: first verifying whether the unique tag identifier obtained by scanning the passive electronic tag of the first ground marking nail is consistent with the unique identifier of the first underground pipeline marking point obtained by scanning the passive electronic tag of the second ground marking nail. If they are consistent, then verifying whether the third hash value is consistent with the first hash value; otherwise, outputting a ground marking nail misplacement reminder message for the first underground pipeline marking point and / or the second underground pipeline marking point.

[0055] S5. The second handheld terminal communicates with the password server to decrypt the first encrypted data, and the longitude and latitude information and pipeline attribute information of the first underground pipeline marking point are restored.

[0056] In the step S5, to ensure the information security during the data decryption process, preferably, the second handheld terminal communicates with the password server to decrypt the first encrypted data, and the longitude and latitude information and pipeline attribute information of the first underground pipeline marking point are restored, including but not limited to the following steps S51 to S55.

[0057] S51. The second handheld terminal communicates with the password server to establish a second session.

[0058] In the step S51, the specific establishment process of the second session can be conventionally implemented based on the existing SIP protocol, which will not be elaborated here.

[0059] S52. The second handheld terminal transmits the first encrypted data to the password server through the second session.

[0060] S53. The password server searches the local key library for the private key generated for the first underground pipeline marking point, and uses the private key to decrypt the first encrypted data to restore the longitude and latitude information and pipeline attribute information of the first underground pipeline marking point.

[0061] In the step S53, to facilitate searching the local key library for the private key generated for the first underground pipeline marking point, specifically, according to the unique tag identifier obtained by scanning the passive electronic tag of the first ground marking nail by the second reader and encrypted and transmitted through the second session (the specific encryption transmission and decryption process can be conventionally deduced with reference to the previous steps S22 to S23 and will not be elaborated here), the private key generated for the first underground pipeline marking point is searched from the local key library.

[0062] S54. The password server uses the second session key, which is applied in the second session and is a symmetric key, to encrypt the longitude and latitude information and pipeline attribute information of the recently restored first underground pipeline marking point, obtaining a fourth ciphertext, and uses the public key of the second handheld terminal to encrypt the second session key, obtaining a fifth ciphertext. Then, through the second session, the fourth ciphertext and the fifth ciphertext are transmitted to the second handheld terminal together.

[0063] In step S54, the public key of the second handheld terminal is also pre-transmitted and stored in the secure and trustworthy module of the password server based on the existing security mechanism. For the purpose of implementing the management of the reading permission for the encrypted data in the tag, preferably, when the pipeline attribute information includes a reading permission, the password server uses the second session key, which is applied in the second session and is a symmetric key, to encrypt the longitude and latitude information and pipeline attribute information of the recently restored first underground pipeline marking point, obtaining a fourth ciphertext, including but not limited to the following steps S541 to S542.

[0064] S541. The password server obtains the reading permission of the second handheld terminal through the second session.

[0065] In step S541, specifically, but not limited to, the reading permission of the second handheld terminal can be routinely determined according to the identity information of the second handheld terminal encrypted and transmitted through the second session (the specific encryption transmission and decryption processes can be obtained by routine derivation with reference to the foregoing steps S22 to S23 and will not be elaborated here).

[0066] S542. The password server determines whether the reading permission of the second handheld terminal reaches the reading permission in the pipeline attribute information according to the pipeline attribute information of the recently restored first underground pipeline marking point. If so, the password server uses the second session key, which is applied in the second session and is a symmetric key, to encrypt the longitude and latitude information and pipeline attribute information of the recently restored first underground pipeline marking point, obtaining a fourth ciphertext. Otherwise, the decryption of the first encrypted data is terminated, and a reading failure reminder message indicating no reading permission is fed back to the second handheld terminal through the second session.

[0067] S55. The second handheld terminal uses the local private key to decrypt the received fifth ciphertext to restore the second session key, and then uses the second session key to decrypt the received fourth ciphertext to restore the longitude and latitude information and pipeline attribute information of the first underground pipeline marking point.

[0068] S6. The second handheld terminal draws the underground pipeline path map of the target area based on the longitude and latitude information and pipeline attribute information of multiple underground pipeline marking points in the target area, and outputs and displays it.

[0069] In the step S6, the specific acquisition process of the longitude and latitude information and pipeline attribute information of the multiple underground pipeline marking points can be obtained by referring to the foregoing steps S4 to S5 one by one (specifically, when scanning the passive electronic tag through the second reader, it is preferable to quickly move the second handheld terminal and the second reader by means of a robot or a robotic dog, etc., so as to improve the scanning efficiency), and the conventional derivation is not repeated here. Since the pipeline attribute information includes but is not limited to details such as pipeline burial depth, pipeline diameter, pipeline material, pipeline flow direction, pipeline type, and / or pipeline project number, etc., the underground pipeline path map as shown in Figure 2 can be conventionally drawn according to the longitude and latitude information and pipeline attribute information of the multiple underground pipeline marking points, or combined with a GIS (Geographic Information System) map, and the underground pipeline path map as shown in Figure 3 can be conventionally drawn.

[0070] Before the step S6, in the case where the encrypted data in the tag of the passive electronic tag of the first ground marking nail is tampered with, although it is impossible to restore the longitude and latitude information and pipeline attribute information of the first underground pipeline marking point based on the encrypted data in the tag through the foregoing step S5, considering that when the second underground pipeline marking point refers to other underground pipeline marking points located in the upstream or downstream direction of the pipeline of the first underground pipeline marking point and adjacent to the first underground pipeline marking point, there is a certain correlation in the details between these other underground pipeline marking points and the first underground pipeline marking point. For example, they have linearly correlated longitude and latitude information, pipeline burial depth, and the same pipeline diameter, pipeline material, pipeline flow direction, pipeline type, and engineering number to which the pipeline belongs. Therefore, it is still possible to restore the longitude and latitude information and pipeline attribute information of the first underground pipeline marking point as realistically as possible based on the longitude and latitude information and pipeline attribute information of these other underground pipeline marking points. That is, in order to supplement the longitude and latitude information and pipeline attribute information of the first underground pipeline marking point when the encrypted data in the corresponding tag is tampered with, preferably, when the second underground pipeline marking point refers to other underground pipeline marking points located in the upstream or downstream direction of the pipeline of the first underground pipeline marking point and adjacent to the first underground pipeline marking point, the method further includes but is not limited to the following steps: when the second handheld terminal verifies that the third hash value is inconsistent with the first hash value, based on the longitude and latitude information and pipeline attribute information of multiple other underground pipeline marking points located in the upstream and / or downstream direction of the pipeline of the first underground pipeline marking point, restore and reproduce the longitude and latitude information and pipeline attribute information of the first underground pipeline marking point. The specific acquisition process of the longitude and latitude information and pipeline attribute information of the multiple other underground pipeline marking points can also be obtained by referring to the foregoing steps S4 to S5 one by one through conventional derivation. The specific process of restoring and reproducing the longitude and latitude information and pipeline attribute information of the first underground pipeline marking point based on the longitude and latitude information and pipeline attribute information of the multiple other underground pipeline marking points can be conventionally realized by using existing technical means. For example, for longitude, latitude, or pipeline burial depth, a linear regression model can be obtained by using the least squares method based on the corresponding values of underground pipeline marking point A, underground pipeline marking point C, and underground pipeline marking point D, and then the corresponding value of underground pipeline marking point B can be calculated based on this linear regression model; and based on the pipeline diameter, pipeline material, pipeline flow direction, pipeline type, and engineering number to which the pipeline belongs of underground pipeline marking point A, underground pipeline marking point C, and underground pipeline marking point D, directly copy the pipeline attribute information of underground pipeline marking point D.In addition, when the passive electronic tag of the first ground identification nail is damaged or the first ground identification nail is misplaced and the first encrypted data cannot be obtained, the longitude and latitude information and pipeline attribute information of the first underground pipeline marking point can also be restored and reproduced based on the longitude and latitude information and pipeline attribute information of the multiple other underground pipeline marking points.

[0071] In summary, the ground identification-guided underground pipeline path identification and management method provided in this embodiment has the following technical effects: This embodiment provides a new digital security identification and management solution for underground pipeline paths. That is, when the positioning instrument is directly above the underground pipeline marking point, the GNSS measurement technology is used to obtain the longitude and latitude information. The first handheld terminal communicates with the password server to encrypt the longitude and latitude information and pipeline attribute information of the underground pipeline marking point, and write it into the passive electronic tag inside the ground identification nail. The second handheld terminal scans the passive electronic tag of the ground identification nail to obtain the encrypted data, and communicates with the password server to decrypt and restore the longitude and latitude information and pipeline attribute information of the underground pipeline marking point. Finally, the second handheld terminal draws and outputs a display of the underground pipeline path map based on the longitude and latitude information and pipeline attribute information of the multiple underground pipeline marking points in the target area. In this way, it can not only effectively assist the inspection and leakage detection work of maintenance personnel and accurately guide excavation construction operations, but also effectively ensure information security and urban security, facilitating practical application and promotion.

[0072] Embodiment 2 Based on the technical solution of Embodiment 1, this embodiment further provides an entity system for implementing the ground identification-guided underground pipeline path identification and management method described in Embodiment 1, as Figure 4 shown. The ground identification-guided underground pipeline path identification and management system includes, but is not limited to, a positioning instrument, a first handheld terminal, a second handheld terminal, a password server, a first ground identification nail, and a passive electronic tag. Among them, a writer is integrated on the first handheld terminal, and a second reader is integrated on the second handheld terminal; The positioning instrument is used to obtain the longitude and latitude information of the first underground pipeline marking point by using the GNSS measurement technology when it is directly above the first underground pipeline marking point, and transmit the obtained result to the first handheld terminal; The first handheld terminal is used to communicate with the password server to encrypt the longitude and latitude information and pipeline attribute information of the first underground pipeline marking point after receiving the longitude and latitude information of the first underground pipeline marking point and manually inputting the pipeline attribute information of the first underground pipeline marking point, to obtain the first encrypted data; The first handheld terminal is further configured to write the first encrypted data into a passive electronic tag located inside the first ground marking nail through the writer, where the first ground marking nail is used to be nailed at intervals directly above the first underground pipeline marking point; The second handheld terminal is configured to scan the passive electronic tag of the first ground marking nail through the second reader to obtain the first encrypted data; The second handheld terminal is further configured to communicate with the password server to decrypt the first encrypted data and restore the longitude and latitude information and pipeline attribute information of the first underground pipeline marking point; The second handheld terminal is further configured to draw an underground pipeline path map of the target area based on the longitude and latitude information and pipeline attribute information of multiple underground pipeline marking points in the target area and output and display the map.

[0073] In summary, the technical details and technical effects of this embodiment can be obtained by conventional derivation based on the technical details and technical effects of Embodiment 1, and will not be elaborated here.

[0074] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for identifying and managing underground pipeline paths guided by ground markings, characterized in that: include: When the locator is directly above the first underground pipeline marking point, the locator uses GNSS measurement technology to obtain the latitude and longitude information of the first underground pipeline marking point, and transmits the obtained result to the first handheld terminal; After receiving the longitude and latitude information of the first underground pipeline marking point and manually entering the pipeline attribute information of the first underground pipeline marking point, the first handheld terminal communicates with the cryptographic server to encrypt the longitude and latitude information and pipeline attribute information of the first underground pipeline marking point to obtain first encrypted data; The first handheld terminal writes the first encrypted data into a passive electronic tag located inside a first ground identification nail through a writer, wherein the writer is integrated on the first handheld terminal, and the first ground identification nail is used to be nailed at intervals just above the first underground pipeline marking point; The second handheld terminal scans the passive electronic tag of the first ground identification nail through a second reader to obtain the first encrypted data, wherein the second reader is integrated on the second handheld terminal; The second handheld terminal communicates with the cryptographic server to decrypt the first encrypted data, and restores the longitude and latitude information and pipeline attribute information of the first underground pipeline marking point; The second handheld terminal draws an underground pipeline path map of the target area based on the latitude and longitude information and pipeline attribute information of multiple underground pipeline marking points in the target area and outputs it for display.

2. The method for identifying and managing underground pipeline paths guided by ground markings as claimed in claim 1, characterized in that: The pipeline attribute information includes pipeline burial depth, pipeline diameter, pipeline material, pipeline flow direction, pipeline type, pipeline project number and / or reading authority.

3. The method for identifying and managing underground pipeline paths guided by ground markings as claimed in claim 1, characterized in that: After receiving the longitude and latitude information of the first underground pipeline marking point and manually entering the pipeline attribute information of the first underground pipeline marking point, the first handheld terminal communicates with the password server to encrypt the longitude and latitude information and pipeline attribute information of the first underground pipeline marking point, and obtains first encrypted data, including: After receiving the longitude and latitude information of the first underground pipeline marking point and manually inputting the pipeline attribute information of the first underground pipeline marking point, the first handheld terminal communicates with the cryptographic server to establish a first session; The first handheld terminal uses the first session key, which is a symmetric key and is applied in the first session, to encrypt the latitude and longitude information and pipeline attribute information of the first underground pipeline marking point to obtain a first ciphertext, and uses the public key of the cryptographic server to encrypt the first session key to obtain a second ciphertext, and then transmits the first ciphertext and the second ciphertext together to the cryptographic server through the first session; The cryptographic server uses the local private key to decrypt the received second ciphertext to restore the first session key, and then uses the first session key to decrypt the received first ciphertext to restore the latitude and longitude information of the first underground pipeline marking point and the pipeline attribute information; The cryptographic server randomly generates a pair of asymmetric keys for the first underground pipeline marking point, and uses the public key in the asymmetric key to encrypt the latitude and longitude information and pipeline attribute information of the first underground pipeline marking point to obtain a third ciphertext, and then transmits the third ciphertext to the first handheld terminal through the first session, and stores the private key in the asymmetric key in the local key library for decryption; The first handheld terminal uses the received third ciphertext as first encrypted data obtained by encrypting the longitude and latitude information and pipeline attribute information of the first underground pipeline marking point.

4. The method for identifying and managing underground pipeline paths guided by ground markings as claimed in claim 3, characterized in that: The second handheld terminal communicates with the cryptographic server to decrypt the first encrypted data, and restores the latitude and longitude information and pipeline attribute information of the first underground pipeline marking point, including: The second handheld terminal communicates with the cryptographic server to establish a second session; The second handheld terminal transmits the first encrypted data to the cryptographic server through the second session; The cryptographic server searches the local key library for the private key generated for the first underground pipeline marking point, and uses the private key to decrypt the first encrypted data to restore the latitude and longitude information and pipeline attribute information of the first underground pipeline marking point; The cryptographic server uses the second session key, which is a symmetric key and is applied in the second session, to encrypt the latitude and longitude information and pipeline attribute information of the first underground pipeline marking point that are most recently restored to obtain a fourth ciphertext, and uses the public key of the second handheld terminal to encrypt the second session key to obtain a fifth ciphertext, and then transmits the fourth ciphertext together with the fifth ciphertext to the second handheld terminal through the second session; The second handheld terminal uses the local private key to decrypt the received fifth ciphertext and restore the second session key, and then uses the second session key to decrypt the received fourth ciphertext and restore the latitude and longitude information and pipeline attribute information of the first underground pipeline marking point.

5. The method for identifying and managing underground pipeline paths guided by ground markings as claimed in claim 4, characterized in that: When the pipeline attribute information includes a reading permission, the cryptographic server uses the second session key applied in the second session and being a symmetric key to encrypt the latitude and longitude information and pipeline attribute information of the first underground pipeline marking point that are most recently restored to obtain a fourth ciphertext, including: The password server obtains the reading authority of the second handheld terminal through the second session; The cryptographic server determines whether the reading permission of the second handheld terminal reaches the reading permission in the pipeline attribute information based on the pipeline attribute information of the first underground pipeline marking point that was most recently restored. If so, the second session key that is a symmetric key and is applied in the second session is used to encrypt the latitude and longitude information and pipeline attribute information of the first underground pipeline marking point that were most recently restored to obtain a fourth ciphertext. Otherwise, the decryption of the first encrypted data is terminated, and a reading failure reminder message indicating that there is no reading permission is fed back to the second handheld terminal through the second session.

6. The method for identifying and managing underground pipeline paths guided by ground markings as claimed in claim 1, characterized in that: The first handheld terminal writes the first encrypted data into a passive electronic tag located inside the first ground identification nail through a writer, including: The first handheld terminal transmits the first encrypted data and the password to be verified to the passive electronic tag located inside the first ground identification nail through a writer, wherein the writer is integrated on the first handheld terminal, and the first ground identification nail is used to be nailed at intervals just above the first underground pipeline marking point; The passive electronic tag verifies whether the local access password is consistent with the password to be verified. If so, the first encrypted data is written into the local storage area.

7. The method for identifying and managing underground pipeline paths guided by ground markings as claimed in claim 1, characterized in that: The first handheld terminal writes the first encrypted data into a passive electronic tag located inside the first ground identification nail through a writer, including: The first handheld terminal scans the passive electronic tag of the second ground identification nail through the first reader to obtain the second encrypted data, wherein the first reader is integrated on the first handheld terminal, and the second ground identification nail is used to be nailed at intervals just above the second underground pipeline marking point, and the second underground pipeline marking point refers to other underground pipeline marking points located in the upstream direction of the pipeline or the downstream direction of the pipeline of the first underground pipeline marking point; The first handheld terminal uses a hash algorithm to perform a hash process on the first encrypted data to obtain a first hash value, and uses the hash algorithm to perform a hash process on the second encrypted data to obtain a second hash value; The first handheld terminal writes the first encrypted data and the second hash value into a passive electronic tag located inside a first ground identification nail through a writer, and also writes the second encrypted data and the first hash value into the passive electronic tag of the second ground identification nail in a refresh manner, wherein the writer is integrated on the first handheld terminal, and the first ground identification nail is used to be nailed at intervals directly above the first underground pipeline marking point.

8. The method for identifying and managing underground pipeline paths guided by ground markings as claimed in claim 7, characterized in that: The second handheld terminal scans the passive electronic tag of the first ground identification nail through a second reader to obtain the first encrypted data, including: The second handheld terminal scans the passive electronic tag of the second ground identification nail through a second reader to obtain the first hash value, wherein the second reader is integrated on the second handheld terminal; The second handheld terminal scans the passive electronic tag of the first ground identification nail through the second reader to obtain the encrypted data to be verified, and uses the hash algorithm to perform hash processing on the encrypted data to be verified to obtain a third hash value; The second handheld terminal verifies whether the third hash value is consistent with the first hash value. If so, the encrypted data to be verified is used as the first encrypted data. Otherwise, a data tampering reminder message is output for the first underground pipeline marking point.

9. The method for identifying and managing underground pipeline paths guided by ground markings as claimed in claim 8, characterized in that: When the second underground pipeline marking point refers to another underground pipeline marking point located in the upstream direction of the pipeline or the downstream direction of the pipeline of the first underground pipeline marking point and adjacent to the first underground pipeline marking point, the method further includes: When the second handheld terminal verifies that the third hash value is inconsistent with the first hash value, it restores and reproduces the longitude and latitude information and pipeline attribute information of the first underground pipeline marking point based on the longitude and latitude information and pipeline attribute information of multiple other underground pipeline marking points located in the upstream direction and / or downstream direction of the first underground pipeline marking point.

10. A ground marking-guided underground pipeline path identification and management system, characterized in that: The device comprises a locator, a first handheld terminal, a second handheld terminal, a password server, a first ground identification nail and a passive electronic tag, wherein the first handheld terminal is integrated with a writer, and the second handheld terminal is integrated with a second reader; The locator is used to obtain the longitude and latitude information of the first underground pipeline marking point by using GNSS measurement technology when the first underground pipeline marking point is directly above the first underground pipeline marking point, and transmit the obtained result to the first handheld terminal; The first handheld terminal is used to communicate with the cryptographic server to encrypt the longitude and latitude information and pipeline attribute information of the first underground pipeline marking point after receiving the longitude and latitude information of the first underground pipeline marking point and manually entering the pipeline attribute information of the first underground pipeline marking point, so as to obtain first encrypted data; The first handheld terminal is further used to write the first encrypted data into a passive electronic tag located inside the first ground identification nail through the writer, wherein the first ground identification nail is used to be nailed at intervals just above the first underground pipeline marking point; The second handheld terminal is used to scan the passive electronic tag of the first ground identification nail through the second reader to obtain the first encrypted data; The second handheld terminal is further used to communicate with the cryptographic server to decrypt the first encrypted data and restore the latitude and longitude information and pipeline attribute information of the first underground pipeline marking point; The second handheld terminal is also used to draw an underground pipeline path map of the target area based on the latitude and longitude information and pipeline attribute information of multiple underground pipeline marking points in the target area and output it for display.

Images