Positioning system of water conservancy project outdoor communication overhaul well

Abstract

The invention provides a positioning system of a hydraulic engineering outdoor communication overhaul well, and belongs to the field of hydraulic engineering. According to the technical scheme, a microcontroller module is arranged at a communication overhaul well, a navigation positioning module, a near-field positioning auxiliary module, a posture or vibration detection module, an environment and safety sensing module, a mobile communication module, terminal equipment and a map module which are of a split structure are combined, and a positioning confidence fusion model is established; and manual confirmation of coordinate reference points and a multi-network adaptive communication strategy are introduced, so that stable output of a fusion positioning result of the communication overhaul well, quantitative evaluation of positioning confidence, closed-loop calibration of a position drift judgment result and graded reporting and map display of operation and maintenance alarms are realized. The beneficial effects are that a split structure of the navigation positioning module is matched with the near field positioning auxiliary module, a positioning confidence fusion model is combined with manual confirmation of a coordinate reference point, and position drift is determined; and the attitude or vibration detection module is awakened, a multi-network adaptive communication strategy is reported, and the reliability is improved.

Description

Technical Field

[0001] This invention relates to the field of water conservancy engineering, and more particularly to a positioning system for outdoor communication maintenance wells in water conservancy engineering. Background Technology

[0002] According to the construction requirements of the water conservancy project information system, information transmission relies on communication networks. The main components of these networks include optical cables, conduits, and communication maintenance wells. Based on the requirements of optical cable laying processes and line conditions, optical cable splicing points are required at locations such as distances exceeding 200 meters, crossing roads, rivers, and conduit entry / exit points. All optical cable splicing points should be located within communication maintenance wells. In water conservancy projects, these wells are typically located near rivers, lakes, and reservoirs for the maintenance and repair of the communication network. These wells not only undertake the connection and transmission of communication lines but also serve as crucial safeguards for the safe operation of water conservancy projects.

[0003] In the past, the location of maintenance wells relied mainly on manual memory and blueprints, a method with many limitations. First, manual memory is prone to errors, especially when there are a large number of maintenance wells widely distributed, making it extremely difficult to accurately remember the location of each one. Second, blueprints are not up-to-date; if changes occur to the water conservancy facilities or new maintenance wells are added, the blueprints cannot reflect these changes in a timely manner. Summary of the Invention

[0004] The purpose of this invention is to provide a positioning system for outdoor communication maintenance wells in water conservancy projects that assists maintenance personnel in quickly and accurately locating wells, reduces positioning errors of communication maintenance wells, reduces the risk of damage to communication networks, improves the accuracy, effectiveness and security of information transmission, and enhances the overall stability of communication networks.

[0005] This invention is achieved through the following measures: A positioning system for an outdoor communication maintenance well in a water conservancy project includes a microcontroller module, a navigation and positioning module, a near-field positioning auxiliary module, an attitude or vibration detection module, an optional environmental and safety sensing module, a mobile communication module, a terminal device, a map module, and a waterproof housing. The microcontroller module is housed within the waterproof housing and electrically connected to the navigation and positioning module, the near-field positioning assistance module, the attitude or vibration detection module, the environment and safety sensing module, and the mobile communication module. The microcontroller module performs data acquisition scheduling, power consumption control, data preprocessing, and strategy execution for the navigation and positioning module, mobile communication module, near-field positioning assistance module, attitude or vibration detection module, and environment and safety sensing module. The terminal device is communicatively connected to the mobile communication module. The map module is connected to or integrated into the terminal device. The near-field positioning auxiliary module is preferably located near the manhole cover or manhole opening, and is used to communicate or measure distances with the terminal equipment over short distances to generate near-field positioning data for the maintenance manhole.

[0006] The invention also has the following specific features: The microcontroller module is configured to perform weighted fusion of navigation positioning data, near-field positioning data and historical stable coordinates based on a fixed-position confidence fusion model to output fused positioning results and fixed-position confidence, and to perform position drift determination in conjunction with manually confirmed coordinate reference points, and to control the mobile communication module to complete hierarchical reporting according to a multi-network adaptive communication strategy. The location reliability fusion model uses at least three types of input sources: navigation positioning data, near-field positioning data, and historical stable coordinates. This allows the fusion positioning result to be stabilized by near-field positioning data or historical stable coordinates in scenarios where navigation positioning data is distorted or obstructed. The historical stable coordinates are derived from the statistical values ​​of the stable interval of previous fusion positioning results or manually confirmed coordinate reference points. The manually confirmed coordinate reference point is generated by the terminal device on-site confirmation of the location of the communication maintenance well, and serves as the basis for updating historical stable coordinates; when the deviation between the fused positioning result and the manually confirmed coordinate reference point exceeds a preset threshold, a location drift alarm is generated and the terminal device is triggered to update the spatial theme status of the communication maintenance well in the map module.

[0007] The navigation and positioning module is a split structure, including a positioning host installed inside the communication maintenance well and a high-gain navigation and positioning antenna installed inside the well cover, near the well opening, or in a concealed location on the ground surface. The high-gain navigation and positioning antenna is electrically connected to the positioning host through a sealed connection structure to reduce satellite signal attenuation caused by well body obstruction.

[0008] The attitude or vibration detection module is used to trigger the microcontroller module to wake up from a low-power state, so as to start the navigation and positioning module and the mobile communication module to complete the rapid location of abnormal events, position drift determination and hierarchical reporting.

[0009] The environment and safety sensing module is used to collect at least one or more environmental data, such as water accumulation in the well, water level, temperature and humidity, or open cover status. The microcontroller module associates the environmental data with the position drift determination result to generate an operation and maintenance risk warning bound to the spatial location of the communication maintenance well.

[0010] The mobile communication module includes a cellular communication submodule and a low-power wide-area communication submodule. The cellular communication submodule is used to carry high-priority alarms, location drift information and firmware upgrade data, while the low-power wide-area communication submodule is used to carry periodic heartbeat information and regular location information. The microcontroller module selects whether to carry the reporting by the cellular communication submodule or the low-power wide-area communication submodule according to a multi-network adaptive communication strategy. The multi-network adaptive communication strategy selects or switches communication modes based on at least two or more of the following: location confidence, location drift determination result, alarm level, link quality and power consumption budget. The terminal device includes an asset encoding module and a digital twin interface module; The asset coding module is used to generate a unique asset identifier for the communication maintenance well and bind it one by one with the fusion positioning result, the location drift determination result and the alarm information. The digital twin interface module is used to output the bound spatial elements, time series and event alarms to the water conservancy project digital twin platform.

[0011] The map module can be integrated into the terminal device or connected to the back-end terminal to display location and alarm information on the electronic map and remote sensing image map of the GIS geographic information system. The waterproof outer shell provides overall protection for the positioning host inside the well and performs surface anti-corrosion treatment.

[0012] The implementation steps of the system include: S1. The microcontroller module controls the navigation and positioning module to collect navigation and positioning data, controls the near-field positioning auxiliary module to collect near-field positioning data, controls the attitude or vibration detection module to collect attitude or vibration data, and controls the environment and safety sensing module to collect environmental data. The microcontroller module performs time stamping and preliminary verification on the data to form an original data set. S2. Perform noise suppression, anomaly removal, and spatiotemporal alignment on the original data set to generate a sample set for localization fusion; S3. Based on the sample set, establish or update the positioning confidence fusion model to obtain confidence weights applicable to navigation positioning data, near-field positioning data and historical stable coordinates; S4. The navigation positioning data, the near-field positioning data and the historical stable coordinates are weighted and fused according to the confidence weight to obtain the fused positioning result and positioning confidence of the communication maintenance well; S5. The terminal device generates or updates the manually confirmed coordinate reference point on site. The microcontroller module judges the deviation between the fused positioning result and the manually confirmed coordinate reference point to obtain the position drift judgment result, and generates or updates alarm information by combining the attitude or vibration data and the environmental data. S6. The microcontroller module executes a multi-network adaptive communication strategy based on the positioning confidence, the position drift determination result and the alarm information, and controls the mobile communication module to select a communication method to report to the terminal device. S7. The terminal device loads the fused positioning result, the position drift determination result and the alarm information into the map module for display, statistics or output, thereby forming a closed loop for the position calibration and operation and maintenance of the communication maintenance well.

[0013] The beneficial effects of this invention are as follows: 1. Improved locationability at the structural level By adopting a split-type navigation and positioning module, the positioning host is placed inside the communication maintenance well, and the high-gain navigation and positioning antenna is set inside the well cover, near the well opening, or in a concealed place on the ground surface and a sealed connection structure is adopted to achieve hardware-level compensation for well body obstruction scenarios, thereby improving the availability and stability of navigation and positioning data.

[0014] 2. Stable positioning output at the algorithm level By using a location reliability fusion model, navigation positioning data, near-field positioning data, and historical stable coordinates are weighted and fused to output fused positioning results and location reliability. This ensures that the fused positioning results remain stable even in scenarios where navigation positioning data is distorted or occluded, reducing the probability of coordinate jumps.

[0015] 3. Long-term consistency guarantee at the closed-loop level By generating or updating manually confirmed coordinate reference points on-site through terminal equipment, and determining the position drift based on the deviation between the fused positioning results and the manually confirmed coordinate reference points, the coordinates of communication maintenance wells can be calibrated and traceably updated, significantly improving the consistency of long-term asset positioning.

[0016] 4. Balancing low power consumption and reliable reporting The microcontroller module is woken up from a low-power state by the attitude or vibration detection module, and the navigation and positioning module and mobile communication module are started in an event-driven manner. At the same time, the multi-network adaptive communication strategy is used to select the communication mode between the cellular communication submodule and the low-power wide-area communication submodule, so as to achieve comprehensive optimization of power consumption and reliability.

[0017] 5. Comprehensive identification and mapping of operational risks The environmental and safety sensing module collects environmental data such as water accumulation, water level, temperature and humidity, or open cover status in the well, and associates it with the location drift judgment results to generate operation and maintenance risk warnings. This enables the terminal device to display alarm topics and statistical results on the map module that are bound to the spatial location of the communication maintenance well, thereby improving inspection efficiency and preventive maintenance capabilities. Attached Figure Description

[0018] Figure 1 A schematic diagram of the structure of an embodiment of the present invention.

[0019] Figure 2 A schematic diagram of the terminal device in this embodiment of the invention. Detailed Implementation

[0020] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0021] To clearly illustrate the technical features of this solution, the following detailed implementation method will be used to explain the solution.

[0022] Example 1 See Figures 1-2 A positioning system for an outdoor communication maintenance well in a water conservancy project includes a microcontroller module, a navigation and positioning module, a near-field positioning auxiliary module, an attitude or vibration detection module, an optional environmental and safety sensing module, a mobile communication module, a terminal device, a map module, and a waterproof housing. The microcontroller module is housed within the waterproof housing and electrically connected to the navigation and positioning module, the near-field positioning assistance module, the attitude or vibration detection module, the environment and safety sensing module, and the mobile communication module. The microcontroller module performs data acquisition scheduling, power consumption control, data preprocessing, and strategy execution for the navigation and positioning module, mobile communication module, near-field positioning assistance module, attitude or vibration detection module, and environment and safety sensing module. The terminal device is communicatively connected to the mobile communication module. The map module is connected to or integrated into the terminal device. The near-field positioning auxiliary module is preferably located near the manhole cover or manhole opening, and is used to communicate or measure distances with the terminal equipment over short distances to form near-field positioning data for the maintenance manhole. The map module can be integrated into the terminal device or connected to the back-end terminal to display location and alarm information on the electronic map and remote sensing image map of the GIS geographic information system. The waterproof outer shell provides overall protection for the positioning host inside the well and performs surface anti-corrosion treatment.

[0023] Example 2 See Figures 1-2 A positioning system for an outdoor communication maintenance well in a water conservancy project includes a microcontroller module, a navigation and positioning module, a near-field positioning auxiliary module, an attitude or vibration detection module, an optional environmental and safety sensing module, a mobile communication module, a terminal device, a map module, and a waterproof housing. The microcontroller module is housed within the waterproof housing and electrically connected to the navigation and positioning module, the near-field positioning assistance module, the attitude or vibration detection module, the environment and safety sensing module, and the mobile communication module. The microcontroller module performs data acquisition scheduling, power consumption control, data preprocessing, and strategy execution for the navigation and positioning module, mobile communication module, near-field positioning assistance module, attitude or vibration detection module, and environment and safety sensing module. The terminal device is communicatively connected to the mobile communication module. The map module is connected to or integrated into the terminal device. The near-field positioning auxiliary module is preferably located near the manhole cover or manhole opening, and is used to communicate or measure distances with the terminal equipment over short distances to generate near-field positioning data for the maintenance manhole.

[0024] The microcontroller module is configured to perform weighted fusion of navigation positioning data, near-field positioning data and historical stable coordinates based on a fixed-position confidence fusion model to output fused positioning results and fixed-position confidence, and to perform position drift determination in conjunction with manually confirmed coordinate reference points, and to control the mobile communication module to complete hierarchical reporting according to a multi-network adaptive communication strategy. In a preferred embodiment, the location confidence fusion model is used to perform confidence-driven weighted fusion of navigation positioning data, near-field positioning data, and historical stable coordinates, outputting the fused positioning result and location confidence of the communication maintenance well. The fusion expression is as follows:

[0025] in, For fusion positioning results; The navigation and positioning coordinates output by the navigation and positioning module;

[0026] The near-field positioning coordinates output by the near-field positioning assistance module; As a historical stable coordinate; Let the confidence weights correspond to the three types of input sources, and satisfy the following:

[0027] To enable the weights to be calculated in an engineerable manner, the microcontroller module preferably obtains the confidence score of each input source in the following fractional form and then normalizes it:

[0028] in, Scoring the navigation positioning reliability; Number of available satellites; This is the upper limit of the satellite quantity setting. The average signal-to-noise ratio of the satellite signal; This is the upper limit calibration value for the signal-to-noise ratio.

[0029] For near-field location reliability scoring; This refers to the near-field positioning ranging residual or short-time fluctuation. This is the baseline value for residual normalization.

[0030] Score the historical stability confidence level; This represents the time elapsed since the last manually confirmed update of the coordinate reference point; This serves as a baseline value for duration normalization.

[0031] The confidence weights are preferably obtained using a normalization method:

[0032] Therefore, when well blockage causes a decrease in the quality of navigation and positioning data, the positioning reliability fusion model can automatically increase the weight of near-field positioning data or historical stable coordinates to suppress jumps in the fused positioning results.

[0033] The location reliability fusion model uses at least three types of input sources: navigation positioning data, near-field positioning data, and historical stable coordinates. This allows the fusion positioning result to be stabilized by near-field positioning data or historical stable coordinates in scenarios where navigation positioning data is distorted or obstructed. The historical stable coordinates are derived from the statistical values ​​of the stable interval of previous fusion positioning results or manually confirmed coordinate reference points. In a preferred embodiment, the update priority of the historical stable coordinates is: updates of manually confirmed coordinate reference points are higher than updates of stable interval statistics; when manually confirmed coordinate reference points exist, the microcontroller module uses them as the main source of historical stable coordinates to improve the long-term positioning consistency of communication maintenance wells.

[0034] The manually confirmed coordinate reference point is generated by the terminal device on-site confirmation of the location of the communication maintenance well, and serves as the basis for updating historical stable coordinates; when the deviation between the fused positioning result and the manually confirmed coordinate reference point exceeds a preset threshold, a location drift alarm is generated and the terminal device is triggered to update the spatial theme status of the communication maintenance well in the map module.

[0035] In a preferred embodiment, the manually confirmed coordinate reference point is denoted as... The microcontroller module calculates the deviation between the fused positioning results and the manually confirmed coordinate reference points.

[0036] in, This is the distance of positional deviation; For fusion positioning results; The coordinate reference point is manually confirmed.

[0037] When the following conditions are met: If this occurs, a position drift alarm will be generated; where To preset the drift threshold, it is preferable to set it in stages according to different water conservancy project sections, geological conditions, or construction disturbance frequencies. The location drift alarm triggers the terminal device to update the spatial theme status of the communication maintenance well in the map module.

[0038] The navigation and positioning module is a split structure, including a positioning host installed inside the communication maintenance well and a high-gain navigation and positioning antenna installed inside the well cover, near the well opening, or in a concealed location on the ground surface. The high-gain navigation and positioning antenna is electrically connected to the positioning host through a sealed connection structure to reduce satellite signal attenuation caused by well body obstruction.

[0039] The attitude or vibration detection module is used to trigger the microcontroller module to wake up from a low-power state, so as to start the navigation and positioning module and the mobile communication module to complete the rapid location of abnormal events, position drift determination and hierarchical reporting.

[0040] In a preferred embodiment, the attitude or vibration detection module outputs an event intensity score. Its fractional expression is:

[0041] in, The collected peak acceleration or vibration amplitude; This is the normalized baseline value.

[0042] When the following conditions are met:

[0043] The microcontroller module is woken up from a low-power state and starts the navigation and positioning module and the mobile communication module to perform rapid data acquisition, fusion positioning calculation, position drift determination and hierarchical reporting.

[0044] The environment and safety sensing module is used to collect at least one or more environmental data, such as water accumulation in the well, water level, temperature and humidity, or open cover status. The microcontroller module associates the environmental data with the position drift determination result to generate an operation and maintenance risk warning bound to the spatial location of the communication maintenance well.

[0045] In a preferred embodiment, the microcontroller module converts environmental data into an environmental risk score. The preferred approach is to use a linear fractional form with decomposition:

[0046] in, This refers to the water level or other related quantity in the well. This serves as a baseline value for water accumulation. This refers to a comprehensive index of humidity or temperature and humidity within the well. This is the humidity normalization baseline value; The environmental weight coefficient is and satisfies .

[0047] The terminal device preferably includes The results of position drift determination and attitude or vibration data are used together for alarm classification, and thematic displays and statistical results bound to the spatial location of communication maintenance wells are generated in the map module.

[0048] The mobile communication module includes a cellular communication submodule and a low-power wide-area communication submodule. The cellular communication submodule is used to carry high-priority alarms, location drift information and firmware upgrade data, while the low-power wide-area communication submodule is used to carry periodic heartbeat information and regular location information. The microcontroller module selects whether to carry the reporting by the cellular communication submodule or the low-power wide-area communication submodule according to a multi-network adaptive communication strategy. The multi-network adaptive communication strategy selects or switches communication modes based on at least two or more of the following: location confidence, location drift determination result, alarm level, link quality and power consumption budget. In a preferred embodiment, the multi-network adaptive communication strategy is executed by a microcontroller module, which preferably constructs a utility function for the communication method and selects the communication bearer accordingly:

[0049] in, For the first The combined utility of various communication methods; Assess link quality. Report energy consumption estimates to the unit; This is the energy consumption penalty coefficient; This is the optimal communication method.

[0050] When the alarm level is high, the location drift determination result is abnormal, or a large data packet needs to be uploaded, the microcontroller module preferably controls the cellular communication submodule to report; when it is a periodic heartbeat or a regular fusion positioning result report, it preferably controls the low-power wide-area communication submodule to report.

[0051] The terminal device includes an asset encoding module and a digital twin interface module; The asset coding module is used to generate a unique asset identifier for the communication maintenance well and bind it one by one with the fusion positioning result, the location drift determination result and the alarm information. The digital twin interface module is used to output the bound spatial elements, time series and event alarms to the water conservancy project digital twin platform.

[0052] The map module can be integrated into the terminal device or connected to the back-end terminal to display location and alarm information on the electronic map and remote sensing image map of the GIS geographic information system. The waterproof outer shell provides overall protection for the positioning host inside the well and performs surface anti-corrosion treatment.

[0053] Example 3 See Figures 1-2 The implementation steps of the positioning system based on the outdoor communication maintenance well of water conservancy projects include: S1. The microcontroller module controls the navigation and positioning module to collect navigation and positioning data, controls the near-field positioning auxiliary module to collect near-field positioning data, controls the attitude or vibration detection module to collect attitude or vibration data, and controls the environment and safety sensing module to collect environmental data. The microcontroller module performs time stamping and preliminary verification on the data to form an original data set. S2. Perform noise suppression, anomaly removal, and spatiotemporal alignment on the original data set to generate a sample set for localization fusion; S3. Based on the sample set, establish or update the positioning confidence fusion model to obtain confidence weights applicable to navigation positioning data, near-field positioning data and historical stable coordinates; S4. The navigation positioning data, the near-field positioning data and the historical stable coordinates are weighted and fused according to the confidence weight to obtain the fused positioning result and positioning confidence of the communication maintenance well; S5. The terminal device generates or updates the manually confirmed coordinate reference point on site. The microcontroller module judges the deviation between the fused positioning result and the manually confirmed coordinate reference point to obtain the position drift judgment result, and generates or updates alarm information by combining the attitude or vibration data and the environmental data. S6. The microcontroller module executes a multi-network adaptive communication strategy based on the positioning confidence, the position drift determination result and the alarm information, and controls the mobile communication module to select a communication method to report to the terminal device. S7. The terminal device loads the fused positioning result, the position drift determination result and the alarm information into the map module for display, statistics or output, thereby forming a closed loop for the position calibration and operation and maintenance of the communication maintenance well.

[0054] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features of the invention herein.

Claims

1. A positioning system for a waterworks outdoor communication manhole, characterized by, The microcontroller module, the navigation positioning module, the near-field positioning auxiliary module, the attitude or vibration detection module, the optional environment and safety sensing module, the mobile communication module, the terminal device, the map module, and the waterproof shell are included. The microcontroller module is arranged in the waterproof shell and is electrically connected with the navigation positioning module, the near-field positioning auxiliary module, the attitude or vibration detection module, the environment and safety sensing module, and the mobile communication module respectively; the terminal device is in communication connection with the mobile communication module; and the map module is connected with the terminal device or integrated in the terminal device.

2. The hydraulic civil works outdoor communication manhole positioning system according to claim 1, characterized in that, The microcontroller module is configured to perform weighted fusion on navigation positioning data, near-field positioning data, and historical stable coordinates based on a positioning confidence fusion model to output a fusion positioning result and a positioning confidence, to perform position drift determination in combination with an artificial confirmation coordinate reference point, and to control the mobile communication module to complete hierarchical reporting according to a multi-network adaptive communication strategy; The positioning confidence fusion model uses at least navigation positioning data, near-field positioning data, and historical stable coordinates as three types of input sources, so that the fusion positioning result is compensated and stabilized by near-field positioning data or historical stable coordinates in a navigation positioning data distortion or shielding scene; The artificial confirmation coordinate reference point is generated by the terminal device on site by confirming the position of a communication maintenance well and serves as a basis for updating the historical stable coordinates; when the deviation between the fusion positioning result and the artificial confirmation coordinate reference point exceeds a preset threshold, a position drift alarm is generated and the terminal device is triggered to update the spatial theme state of the communication maintenance well in the map module.

3. The hydraulic engineering outdoor communication manhole positioning system according to claim 1, wherein, The navigation positioning module is of a split structure and includes a positioning host arranged in a communication maintenance well and a high-gain navigation positioning antenna arranged on the inner side of a manhole cover, near a manhole opening, or in a concealed place on the ground, the high-gain navigation positioning antenna being electrically connected with the positioning host through a sealing connection structure.

4. The hydraulic civil works outdoor communication manhole positioning system according to claim 1, characterized in that, The attitude or vibration detection module is used to trigger the microcontroller module to wake up from a low-power state to start the navigation positioning module and the mobile communication module to complete rapid positioning, position drift determination, and hierarchical reporting of an abnormal event.

5. The hydraulic civil works outdoor communication manhole positioning system according to claim 1, characterized in that, The environment and safety sensing module is used to collect one or more types of environment data such as water accumulation, water level, temperature and humidity, or cover opening state in the well, and the microcontroller module associates the environment data with the position drift determination result to generate an operation and maintenance risk prompt that is bound to the spatial position of the communication maintenance well.

6. The hydraulic civil works outdoor communication manhole positioning system according to claim 1, characterized in that, The mobile communication module includes a cellular communication submodule and a low-power wide-area communication submodule, and the microcontroller module selects the cellular communication submodule or the low-power wide-area communication submodule to carry out reporting according to a multi-network adaptive communication strategy; The multi-network adaptive communication strategy selects or switches a communication mode according to two or more of the positioning confidence, the position drift determination result, the alarm level, the link quality, and the power consumption budget; The terminal device includes an asset coding module and a digital twin interface module; The asset coding module is used to generate a unique asset identification for the communication maintenance well and bind it one by one with the fusion positioning result, the position drift determination result, and the alarm information; The digital twin interface module is used to output the above bound spatial elements, time series and event alarms to the digital twin platform of the water conservancy project.

7. The hydraulic civil works outdoor communication manhole positioning system of claim 1, wherein, The implementation steps of the system include: S1, the microcontroller module controls the navigation positioning module to collect navigation positioning data, controls the near-field positioning auxiliary module to collect near-field positioning data, controls the attitude or vibration detection module to collect attitude or vibration data, and controls the environment and safety sensing module to collect environment data, time marks and preliminarily verifies the data to form an original data set; S2, the original data set is subjected to noise suppression, abnormality rejection and space-time alignment to generate a sample set for positioning fusion; S3, a positioning confidence fusion model is established or updated based on the sample set to obtain confidence weights suitable for navigation positioning data, near-field positioning data and historical stable coordinates; S4, the navigation positioning data, the near-field positioning data and the historical stable coordinates are weighted fused according to the confidence weights to obtain a fusion positioning result and a positioning confidence of the communication maintenance well; S5, the terminal device generates or updates an artificial confirmation coordinate reference point on site, the microcontroller module judges the deviation between the fusion positioning result and the artificial confirmation coordinate reference point to obtain a position drift determination result, and generates or updates alarm information in combination with the attitude or vibration data and the environment data; S6, the microcontroller module executes a multi-network adaptive communication strategy according to the positioning confidence, the position drift determination result and the alarm information, and controls the mobile communication module to select a communication mode for reporting to the terminal device; S7, the terminal device loads the fusion positioning result, the position drift determination result and the alarm information to a map module for display, statistics or output, thereby forming a position calibration and operation and maintenance closed loop of the communication maintenance well.

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