A stress monitoring node mounted on an overhead line tower

Abstract

The utility model provides an installation in overhead line pole tower's stress monitoring node relates to overhead line early warning device technical field, this installation in overhead line pole tower's stress monitoring node includes installation in overhead line pole tower's multiple stress monitoring nodes and is used for centralized processing early warning information's monitoring center, stress monitoring node includes: stress collection unit, data processing unit is connected to stress collection unit, judges whether the tension exceeds the preset threshold value, and generates early warning signal, wireless communication unit is connected to data processing unit, installation fixing device is used for fixing stress collection unit, data processing unit and wireless communication unit in overhead line pole tower's wire junction, monitoring center includes: data receiving unit, data analysis unit is connected to data receiving unit, is used for analyzing early warning signal, determines the wire position of abnormal occurrence, alarm unit is connected to data analysis unit. Realize to overhead line wire tension real -time monitoring and early warning.

Description

Technical Field

[0001] This utility model relates to the technical field of early warning devices for overhead lines, and in particular to a stress monitoring node installed on an overhead line tower. Background Technology

[0002] As the main carrier of power transmission, overhead lines are exposed to the natural environment for a long time and are susceptible to severe weather (such as icing, strong winds, rainstorms, wildfires, etc.) and external damage (such as bird damage, construction damage, etc.), which can lead to serious accidents such as conductor breakage, pole collapse, or even tower collapse, causing large-scale power outages and causing huge losses to the national economy and people's lives.

[0003] Therefore, real-time monitoring and early warning of overhead lines, and timely detection and handling of potential line breakage risks are crucial for ensuring the safe and stable operation of the power grid.

[0004] Traditional overhead line inspections rely primarily on regular manual patrols, which are inefficient and fail to detect hidden faults. While some regions have begun using technologies such as video surveillance or robotic inspections, these technologies mainly target visible external defects and are ineffective in providing early warnings of line breakage risks caused by changes in internal stress.

[0005] Therefore, it is necessary to improve the existing overhead line early warning technology to overcome its shortcomings. Summary of the Invention

[0006] To overcome the problems existing in related technologies, the purpose of this utility model is to provide a stress monitoring node installed on overhead line towers. This stress monitoring node installed on overhead line towers integrates a stress acquisition unit, a data processing unit, a wireless communication unit, and a fixing device, thereby realizing real-time monitoring, intelligent early warning, and wireless data transmission of the tension of overhead line conductors, overcoming the problem of untimely early warning in the prior art.

[0007] A stress monitoring node installed on an overhead line tower includes: The stress acquisition unit includes a tension sensor, which is installed at the connection between the overhead line tower and the conductor to convert the tension change of the conductor into an electrical signal. A data processing unit is connected to the stress acquisition unit. The data processing unit includes a microprocessor. Before the electrical signal enters the microprocessor, it is filtered by a hardware circuit of an RC filter or an active filter. The data processing unit is used to determine whether the tensile force exceeds a preset threshold and to generate a warning signal when the tensile force exceeds the preset threshold. A wireless communication unit, connected to the data processing unit, is used to transmit the warning signal outward; The mounting and fixing device is used to fix the stress acquisition unit, the data processing unit and the wireless communication unit to the conductor connection of the overhead line tower. The mounting and fixing device includes a connecting mechanism and a wire clamping mechanism; The connecting mechanism includes a large triangular connecting plate, a connecting hanging plate, a double parallel hanging plate, a single hanging plate, a U-shaped hanging ring, a compensating chain fitting, and an extension rod; the single hanging plate is provided with an elevation angle adjustment column and an annular bolt, which are used to adjust the elevation angle of the single hanging plate to adjust the installation angle of the stress monitoring node; the tension sensor is installed on the compensating chain fitting; The wire clamping mechanism includes a wire clamp and a wedge-shaped wire groove, the inner surface of which is coated with a graphene nano-anti-corrosion coating.

[0008] By using multiple stress monitoring nodes deployed in a distributed manner to monitor changes in conductor tension in real time, and by using a monitoring center to centrally process early warning information, comprehensive monitoring and timely early warning of the overhead line's operating status have been achieved. This has effectively prevented safety accidents and economic losses caused by conductor breakage and improved the reliability and safety of the power system.

[0009] Furthermore, the alarm unit includes at least one audible and visual alarm, which is installed at the monitoring center or connected to a remote alarm terminal via a wireless communication unit.

[0010] Audible and visual alarms can be installed at the monitoring center or remote alarm terminals, enabling alarm information to be transmitted to on-duty personnel or remote management personnel in a timely and accurate manner, thus improving the practicality and response speed of the early warning system.

[0011] Furthermore, in addition to audible and visual alarms, vibration alarms, LED display scrolling text alarms, and projection alarms can also be used to provide more suitable alarm methods for different application scenarios and needs.

[0012] Furthermore, multi-level audible and visual alarms use different colors or flashing frequencies of light, and different tones or loudness of sound to represent different warning levels. For example, a level one warning is a flashing yellow light, a level two warning is a flashing orange light, and a level three warning is a solid red light accompanied by a rapid alarm sound.

[0013] Furthermore, audible and visual alarms can be installed in prominent locations such as the control console, walls, and roof of the monitoring center, while remote alarm terminals can be set up in locations such as the maintenance team's office and the manager's office.

[0014] Furthermore, multiple audible and visual alarms can be installed in different locations, so that if one alarm fails, the others can continue to operate, thus improving the reliability of the system.

[0015] Furthermore, the alarm unit can be linked with other systems, such as automatically cutting off the power to the faulty line or activating the backup line when a serious warning occurs.

[0016] Furthermore, the alarm unit also includes a mobile communication module, used to send an alarm SMS containing the location information of the abnormal wire to a designated mobile phone number or to dial a preset alarm phone number.

[0017] By connecting the alarm unit to the mobile communication module, the system can quickly notify the relevant responsible persons of alarm information via SMS or telephone. Even if the responsible persons are not on-site at the monitoring center, they can be informed of the abnormal line situation in time, which improves the efficiency of emergency response.

[0018] Furthermore, in addition to SMS and phone calls, alarm information can also be sent via email, instant messaging software (such as WeChat and DingTalk), and app push notifications.

[0019] Furthermore, different alarm information formats are sent according to different warning levels. For example, a level 1 warning only sends an SMS notification, while a level 3 warning sends both an SMS and makes a phone call.

[0020] Going a step further, set up multi-level contacts, for example, first notify the front-line maintenance staff, and if there is no response within a certain period of time, then notify the higher-level manager.

[0021] Furthermore, automatic speech synthesis uses speech synthesis technology to convert alarm information into speech, which is then automatically broadcast to relevant personnel via telephone, conveying the information more clearly.

[0022] Furthermore, by integrating with a GIS system, a link to geographic location information can be added to the sent alarm SMS messages. Clicking the link allows users to directly view the location of the fault on a map.

[0023] Furthermore, the data analysis unit has a built-in three-level early warning mechanism, and the alarm unit triggers different modes of sound, light and / or electrical signals according to different early warning levels; The alarm unit also includes an alarm log recording module, which records the time, location, warning level, and processing status of each alarm event.

[0024] The three-level early warning mechanism can trigger different alarm signals based on the severity of the stress on the conductor, making the early warning information more precise and enabling maintenance personnel to quickly determine the urgency of the fault and take corresponding countermeasures.

[0025] The alarm log recording module can record detailed information about each alarm event, providing data support for post-event analysis of accident causes, evaluation of system performance, and optimization of early warning strategies, which helps improve the reliability and accuracy of the early warning system.

[0026] Furthermore, based on actual needs, four, five, or even more levels of alerts can be set to more finely classify risk levels. Users can customize the thresholds for each alert level according to the actual conditions of the network lines, thereby improving the accuracy of alerts.

[0027] Furthermore, in addition to the tensile strength, environmental factors such as wind speed, temperature, and ice thickness, as well as historical operating data of the conductor, can be combined for comprehensive judgment to improve the accuracy of early warning.

[0028] Furthermore, different alarm modes can be combined according to different warning levels. For example, a level 1 warning is a text message notification, a level 2 warning is a text message plus an audible and visual alarm, and a level 3 warning is a text message, an audible and visual alarm plus a telephone notification.

[0029] Furthermore, in addition to time, location, and warning level, it can also record information such as the pull force value at the time of the alarm, environmental parameters (such as wind speed and temperature), relevant responsible persons, handling measures, and handling results.

[0030] Furthermore, logs can be stored on local storage devices, cloud servers, or distributed databases.

[0031] Furthermore, it provides a user-friendly log query interface, supporting searches by time, location, alert level, and other criteria, and offers statistical analysis functions to generate reports or charts. It also supports exporting logs to common file formats (such as CSV and Excel) and regular backups to prevent data loss.

[0032] Furthermore, alarm logs can be integrated with other systems (such as defect management systems and equipment management systems) to achieve data sharing and linkage.

[0033] Furthermore, the monitoring center also includes a data storage unit and a display unit; the storage unit is used to record received early warning signals and corresponding conductor position information; the display unit is used to display the topology of the overhead line and the status information of each stress monitoring node.

[0034] The data storage and display units enable the monitoring center to intuitively display the overall operating status of overhead lines and conveniently query and manage historical early warning information, providing operation and maintenance personnel with an effective monitoring tool and improving the efficiency and level of line management.

[0035] Furthermore, data storage methods can include local hard drives, solid-state drives, network storage devices (NAS), cloud storage, and more.

[0036] Furthermore, by utilizing 3D modeling technology, the overhead lines and their surrounding environment can be displayed in 3D form, providing a more intuitive view of the lines' operational status.

[0037] Furthermore, the stress acquisition unit includes a tension sensor, which is installed at the connection between the overhead line tower and the conductor to monitor the changes in the tension of the conductor in real time. The tension sensor is a piezoelectric tension sensor or a fiber optic tension sensor.

[0038] Tension sensors are directly installed at the connection between the overhead line tower and the conductor, enabling direct and accurate measurement of the actual stress on the conductor, ensuring the reliability and accuracy of stress monitoring data. Piezoelectric or fiber optic tension sensors offer advantages such as high precision, strong anti-interference capabilities, and long service life, making them adaptable to the harsh working environment of overhead lines and ensuring long-term stable and reliable monitoring.

[0039] Furthermore, in addition to the connection between the tower and the conductor, the sensor can also be installed at the mid-span of the conductor, or multiple sensors can be installed at different locations to perform data fusion and improve the accuracy of monitoring.

[0040] Furthermore, non-contact measurement methods such as laser ranging and machine vision can be used to measure the deformation or vibration frequency of the conductor and indirectly calculate the tension of the conductor.

[0041] Furthermore, the following can also be adopted: A strain sensor is a device that attaches a strain gauge to a wire and calculates the tension by measuring the strain in the wire. A resistance strain gauge tension sensor is a sensor that measures tension by utilizing the resistance strain effect. A magnetostrictive force sensor is a sensor that measures tensile force by utilizing the property of ferromagnetic materials to deform in a magnetic field. A vibrating wire tension sensor is a sensor that measures tension based on the principle that the vibration frequency of a string is related to the tension.

[0042] Furthermore, the data processing unit employs a low-power microprocessor, which has embedded a data processing algorithm for filtering, amplifying, and comparing the signals acquired by the stress acquisition unit.

[0043] Low-power microprocessors can reduce the energy consumption of stress monitoring nodes and extend their working time; at the same time, the embedded data processing algorithms can effectively preprocess stress signals, improving data accuracy and anti-interference capabilities.

[0044] Furthermore, hardware filtering involves filtering the signal through hardware circuitry before it enters the microprocessor, for example, using an RC filter or an active filter.

[0045] Furthermore, the wireless communication unit employs an NB-IoT communication module or a LoRa communication module to transmit the early warning signal to the monitoring center over a long distance.

[0046] NB-IoT or LoRa communication modules have advantages such as wide coverage, low power consumption, and long transmission distance, enabling reliable transmission of early warning signals and ensuring that the monitoring center can receive alarm information in a timely manner.

[0047] Furthermore, wired communication methods, such as fiber optic communication and power line carrier communication (PLC), can be used, which are suitable for scenarios with short communication distances or high reliability requirements.

[0048] Furthermore, multiple stress monitoring nodes can form a self-organizing network and transmit data to the monitoring center through relay nodes, making it suitable for areas with complex terrain and poor signal coverage.

[0049] Furthermore, satellite communication can be used as a backup communication method. When other communication methods fail, data can be transmitted to the monitoring center via satellite, thereby improving the reliability of the system.

[0050] Furthermore, the stress monitoring node also includes a power supply unit, which is a solar cell and an energy storage battery.

[0051] The power supply unit, composed of solar cells and energy storage batteries, enables the stress monitoring nodes to be powered by clean energy, eliminating the need for an external power source. This makes installation and deployment more flexible and convenient, and is also energy-saving and environmentally friendly.

[0052] Furthermore, in areas with abundant wind resources, wind turbines can be used to power stress monitoring nodes.

[0053] Furthermore, power line carrier communication (PLC) technology can be used to power stress monitoring nodes using existing power lines.

[0054] Furthermore, the installation and fixing device includes a connection mechanism for connecting the stress acquisition unit, the data processing unit and the wireless communication unit to the overhead line tower, and a conductor clamping mechanism for fixing the conductor to the stress acquisition unit. The wire clamping mechanism includes a wire clamp and a wedge-shaped wire groove, the inner surface of which is coated with a graphene nano-anti-corrosion coating.

[0055] The installation and fixing device can reliably fix each component of the stress monitoring node to the overhead line tower, ensuring its stability and safety; the conductor clamping mechanism adopts wedge-shaped conductor grooves and graphene nano-anti-corrosion coating, which enhances the clamping force and corrosion resistance, and extends the service life of the device.

[0056] Furthermore, different connection mechanisms can be designed according to different tower types and installation environments, such as clamp type, suspension type, and support type.

[0057] Furthermore, hydraulic clamping or eccentric wheel clamping can be used to increase clamping force and reduce damage to the conductor.

[0058] Furthermore, in addition to graphene nano-anti-corrosion coatings, other high-performance anti-corrosion coatings, such as ceramic coatings and composite coatings, can be used to improve corrosion resistance and wear resistance.

[0059] Furthermore, the design incorporates quick-installation structures, such as snap-fit ​​or plug-in connections, to facilitate installation and maintenance.

[0060] Furthermore, the stress acquisition unit and the wire clamping mechanism are integrated into a single design, simplifying the installation process and improving reliability.

[0061] The beneficial effects of this utility model are as follows: This utility model provides a stress monitoring node installed on overhead line towers. This node distributes multiple stress monitoring nodes across the towers, enabling real-time, continuous, and accurate monitoring of conductor tension. Monitoring data from each node is aggregated to a monitoring center via a wireless communication unit, where it is centrally processed and intelligently analyzed by a data analysis unit. Combined with an alarm unit, it promptly and accurately issues early warnings and locates anomalies. This system overcomes the limitations of traditional manual inspection methods, achieving comprehensive perception and intelligent early warning of overhead line operating status. It effectively prevents safety accidents caused by conductor breakage, overload, etc., reduces maintenance costs, ensures the safe and reliable operation of the power system, and improves the intelligence level of the power grid, resulting in significant economic and social benefits. Attached Figure Description

[0062] Figure 1 This is a schematic diagram of a stress monitoring node installed on an overhead line tower as provided in Embodiment 1 of this application; Figure 2 This is a schematic diagram of a stress monitoring node installed on an overhead line tower, as provided in Embodiment 2 of this application; Figure 3 This is a schematic diagram of a stress monitoring node installed on an overhead line tower, as provided in Embodiment 3 of this application; Figure 4 This is a schematic diagram of the installation and fixing device provided in this application.

[0063] Figure label: 1. Large triangular connecting plate; 2. UL hanging ring; 3. Anti-loosening nut; 4. Tension steel anchor; 5. Drainage plate; 6. Tension clamp; 7. Double parallel hanging plate; 8. Tension sensor; 9. Sensor wire end; 10. Bowl head hanging plate; 11. Wire clamp; 12. Wire; 13. Single hanging plate; 14. Elevation adjustment column; 15. Ring bolt; 16. Extension rod. Detailed Implementation

[0064] Preferred embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While preferred embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention will be thorough and complete, and will fully convey the scope of the present invention to those skilled in the art.

[0065] Example 1 like Figure 1 , Figure 4 As shown, this embodiment provides a stress monitoring node installed on an overhead line tower. The system mainly includes multiple stress monitoring nodes installed on the overhead line tower and a monitoring center for centralized processing of early warning information.

[0066] Each stress monitoring node mainly includes a stress acquisition unit, a data processing unit, a wireless communication unit, and an installation and fixing device.

[0067] In this embodiment, the stress acquisition unit uses a tension sensor (8), which is installed at the connection between the overhead line tower and the conductor (12), that is, installed on the compensating chain fitting, and directly bears the tension of the conductor (12).

[0068] The tension sensor (8) converts the tension change of the wire (12) into an electrical signal.

[0069] The data processing unit uses a low-power microprocessor, which has a built-in data processing algorithm. This algorithm mainly includes the following steps: The signal collected by the tension sensor (8) is digitally filtered using a digital filtering algorithm to remove high-frequency noise and improve the signal-to-noise ratio.

[0070] Based on the calibration curve of the pre-calibrated tension sensor (8), the filtered signal is converted into the actual tension value.

[0071] The calculated tensile force value is compared with the preset three-level warning threshold to determine whether it exceeds the threshold.

[0072] Level 1 warning threshold: For example, if the tension reaches 80% of the rated tension, it corresponds to a slight overload, and maintenance personnel will be notified via SMS.

[0073] Level 2 warning threshold: For example, if the tension reaches 90% of the rated tension, it corresponds to a severe overload, triggering an audible and visual alarm and sending an SMS notification.

[0074] Level 3 warning threshold: For example, when the tension reaches 95% of the rated tension, it corresponds to the risk of wire breakage, triggering an audible and visual alarm, SMS notification, and activation of the emergency plan.

[0075] If the tensile force exceeds the preset threshold, a corresponding warning signal is generated. The warning signal contains the warning level and the ID information of the stress monitoring node.

[0076] The wireless communication unit adopts a narrowband Internet of Things (NB-IoT) communication module, which features wide coverage, low power consumption, and a large number of connections, making it suitable for overhead line monitoring applications.

[0077] The NB-IoT communication module transmits the early warning signal generated by the data processing unit to the monitoring center through the NB-IoT network.

[0078] The communication protocol adopts a lightweight IoT communication protocol to ensure the reliability and real-time performance of data transmission.

[0079] The mounting and fixing device is used to fix the stress acquisition unit, data processing unit and wireless communication unit to the conductor (12) connection of the overhead line tower. It mainly includes the connection mechanism and the conductor (12) clamping mechanism.

[0080] The connecting mechanism includes a large triangular connecting plate (1), a connecting hanging plate, a double parallel hanging plate (7), a single hanging plate (13), a U-shaped hanging ring, a compensating chain fitting, and an extension rod (16).

[0081] The large triangular connecting plate (1) has multiple bolt holes for connecting other components.

[0082] The connecting plate is fixed to the large triangular connecting plate (1) by bolts. In this embodiment, a Z-shaped plate is used.

[0083] The double parallel hanging plate (7) is fixed to the large triangular connecting plate (1) by bolts. It has a connecting hole, and the U-shaped hanging ring is connected to the double parallel hanging plate (7) through the connecting hole.

[0084] One end of the single-joint hanging plate (13) is connected to the large triangular connecting plate (1), and the other end is connected to one end of the compensation chain fitting.

[0085] The other end of the compensating chain fitting is connected to the wire (12) clamping mechanism, and a tension sensor (8) is installed on the compensating chain fitting.

[0086] The extension rod (16) is used to adjust the length of the connecting mechanism.

[0087] By adjusting the bolt hole positions on the large triangular connecting plate (1) and extending the length of the tie rod (16), the connecting mechanism can be fixed on different types of overhead line towers.

[0088] The conductor (12) clamping mechanism includes a conductor (12) clamp (11) and a wedge-shaped conductor (12) groove.

[0089] The wire clamp (11) includes two clips and a bolt, which clamps the two clips onto the wire (12).

[0090] The wedge-shaped conductor (12) groove is fitted on the conductor (12) clamp (11), and a movable slider is provided inside. When the conductor (12) is subjected to force, the slider slides in the wedge-shaped conductor (12) groove, clamping the conductor (12) more tightly.

[0091] The inner surface of the wedge-shaped conductor (12) groove is coated with a high-performance nano anti-corrosion coating to enhance wear resistance and corrosion resistance and extend service life.

[0092] Each stress monitoring node is also equipped with a power supply unit. In this embodiment, a combination of solar panels and energy storage batteries is used to power the stress monitoring nodes. The solar panels convert solar energy into electrical energy during the day to power the stress monitoring nodes and charge the energy storage batteries; the energy storage batteries power the stress monitoring nodes at night or on cloudy or rainy days.

[0093] The monitoring center mainly includes a data receiving unit, a data analysis unit, an alarm unit, a data storage unit, and a display unit.

[0094] The data receiving unit uses an IoT cloud platform as the NB-IoT data receiving platform, which is responsible for receiving early warning signals from various stress monitoring nodes.

[0095] The platform can handle large amounts of concurrent data, ensuring the reliability and real-time nature of data reception.

[0096] The data analysis unit uses a high-performance server to analyze and process the received early warning signals.

[0097] The data analysis unit determines the specific location of the abnormal conductor (12) based on the stress monitoring node ID information in the early warning signal.

[0098] The data analysis unit has a built-in three-level early warning mechanism, and triggers different alarm modes of the alarm unit according to different early warning levels.

[0099] The alarm unit includes an audible and visual alarm, a mobile communication module, and an alarm log recording module.

[0100] The audible and visual alarm is installed at the monitoring center. It activates an audible and visual alarm upon receiving a level two or three warning signal. The sound intensity of the alarm is greater than 80 decibels, and the flashing frequency is 1Hz to 5Hz.

[0101] When the mobile communication module receives an early warning signal, it sends alarm SMS messages to multiple pre-set mobile phone numbers. The SMS messages include information such as the warning level, time of occurrence, line name, tower number, and conductor location. Users can also dial pre-set alarm numbers.

[0102] The alarm log recording module uses a database to record information such as the time, location, warning level, and processing status of each alarm event, and provides query and export functions.

[0103] The data storage unit uses a large-capacity hard disk as the storage medium to store the received warning signals, the corresponding wire (12) location information, and the alarm log information.

[0104] The display unit uses a large-size display screen to show the topology of the overhead line and the status information of each stress monitoring node.

[0105] In the topology diagram, different colors are used to represent different warning levels. For example, green represents normal, yellow represents Level 1 warning, orange represents Level 2 warning, and red represents Level 3 warning.

[0106] Clicking on a stress monitoring node icon allows you to view detailed information about that node, including real-time tensile force values ​​and historical data curves.

[0107] Example 2 like Figure 2 As shown, the difference between this embodiment and Embodiment 1 is that: In this embodiment, a fiber optic grating tension sensor is used instead of the resistance strain gauge tension sensor in Embodiment 1. The tension of the conductor (12) is measured by utilizing the principle that the center wavelength of the fiber optic grating shifts with strain.

[0108] Fiber Bragg grating tension sensors have advantages such as strong anti-electromagnetic interference capability, high accuracy, corrosion resistance, and long service life, making them particularly suitable for overhead line environments with high voltage and strong electromagnetic fields.

[0109] Fiber Bragg grating tension sensors can be mounted on compensating chain fittings using either adhesive or embedded methods. Adhesive mounting is convenient and quick, suitable for on-site modifications; embedded mounting embeds the fiber Bragg grating inside the fitting, providing better protection and superior long-term stability.

[0110] Fiber Bragg grating tension sensors require a fiber Bragg grating demodulator to convert the wavelength changes of the fiber Bragg grating into electrical signals. The demodulator can be integrated into the data processing unit or connected to the sensor via optical fiber as a standalone device.

[0111] In order to more comprehensively reflect the stress state of the conductor (12), multiple fiber optic grating sensors can be installed on the same fitting, for example, arranged along the axial and radial directions of the conductor (12) to achieve multi-point measurement and data fusion.

[0112] This embodiment uses a LoRa communication module instead of the NB-IoT communication module in Embodiment 1. The LoRa communication module uses, for example, a frequency band of 470MHz-510MHz for communication, and has advantages such as long transmission distance, low power consumption, and strong penetration, making it suitable for scenarios with long overhead lines and complex environments.

[0113] LoRa communication modules can be networked in either a star topology or a mesh topology. Star topologies are simple and easy to deploy, while mesh topologies offer longer transmission distances and higher reliability.

[0114] The data transmission frequency can be set according to actual needs, such as reporting data every 5 minutes. Alternatively, an event-triggered method can be used, reporting data only when the tensile force exceeds a preset threshold, in order to reduce power consumption.

[0115] The antenna of the LoRa communication module can be an external rod antenna or a suction cup antenna. The appropriate antenna type should be selected according to the installation environment and signal strength.

[0116] This embodiment adds a voice broadcast module to the existing embodiment 1. The voice broadcast module can convert warning information (such as warning level, occurrence time, line name, tower number, conductor location, etc.) into speech and broadcast it through a speaker.

[0117] The voice broadcast module uses offline speech synthesis technology to combine and play pre-recorded voice segments based on the warning information, without relying on a network connection. Alternatively, online speech synthesis technology can be used to convert text information into speech in real time, offering greater flexibility.

[0118] Voice broadcasts can be triggered simultaneously with sound and light alarms, or trigger conditions can be set separately as needed, such as triggering voice broadcasts only when a level 3 warning is issued.

[0119] The volume of the voice broadcast module can be adjusted according to the on-site environment to ensure that alarm information can be clearly conveyed to the staff.

[0120] This embodiment adds a GIS (Geographic Information System) module to the existing embodiment 1. The GIS module can import the geographical location, route, and tower information of overhead lines into the system and display them on an electronic map.

[0121] The GIS (Geographic Information System) module can interface with the data analysis unit to display early warning information on an electronic map in real time, and mark the location of the tower where the early warning occurred with different colors or icons.

[0122] When an early warning is issued, the GIS (Geographic Information System) module can automatically plan the best route to the site based on the tower's location information and provide navigation functionality to facilitate maintenance personnel's rapid arrival at the site.

[0123] The GIS (Geographic Information System) module can integrate surrounding environmental data such as meteorological and geological information, providing a more comprehensive reference for early warning analysis.

[0124] Example 3 like Figure 3 , Figure 4 As shown, the difference between this embodiment and Embodiment 1 is that: This embodiment employs a higher-performance ARM processor, such as a Cortex-A series processor, and is equipped with larger memory and storage capacity. Furthermore, it integrates edge computing capabilities, enabling more complex data analysis and processing locally on the data processing unit.

[0125] By embedding machine learning algorithms, such as Support Vector Machines (SVM) or Artificial Neural Networks (ANN), real-time analysis and prediction of conductor tension data can be achieved. For example, models can be trained based on historical tension data and environmental data to predict the fatigue state and remaining life of conductors, enabling more refined early warning management.

[0126] In addition to filtering and calibration, the data processing unit can also perform more complex preprocessing operations, such as feature extraction, to extract more representative feature parameters from the raw tensile data for subsequent model training and prediction.

[0127] The algorithm model in the data processing unit can be remotely updated via the wireless communication unit to adapt to different line conditions and operating states.

[0128] The connection mechanism in this embodiment adopts a clamp-type design, suitable for circular towers. The clamp is made of [for example, stainless steel], which has sufficient strength and corrosion resistance.

[0129] The inner diameter of the clamp can be customized according to the diameter of the tower to ensure a tight fit.

[0130] The clamps are secured using, for example, bolts and nuts, and are equipped with anti-loosening washers to prevent loosening due to vibration or other reasons.

[0131] Rubber or silicone pads can be attached to the inside of the clamp to protect the surface of the tower from scratches.

[0132] In addition to the tensile sensor (8), the stress monitoring node in this embodiment also includes a wind speed sensor and a temperature sensor for monitoring environmental parameters.

[0133] The wind speed sensor used is, for example, a three-cup anemometer or an ultrasonic anemometer, to measure the wind speed around the tower. The wind speed data can be used to analyze the impact of wind force on conductor tension.

[0134] The temperature sensor used is, for example, a platinum resistance temperature sensor or a thermistor temperature sensor, to measure the ambient temperature. The temperature data can be used to correct the temperature drift of the tension sensor (8) and improve the measurement accuracy.

[0135] The data processing unit can integrate environmental parameters such as wind speed and temperature with tensile data, and use the integrated data to make early warning judgments, thereby improving the accuracy of early warnings.

[0136] Wind speed and temperature sensors can be installed on the top or side of the stress monitoring node, with necessary protective measures to prevent rain, dust, etc. from affecting measurement accuracy.

[0137] Furthermore, the stress monitoring node in this embodiment can also be equipped with a tilt sensor to monitor the tilt angle of the tower and assist in determining the tower's stability. The tilt sensor, for example, is a MEMS accelerometer, which can measure the tilt angle of the tower in the X and Y axis directions. When the tilt angle exceeds a preset threshold, the data processing unit can generate an alarm signal and report it to the monitoring center via a wireless communication unit.

[0138] More specifically, such as Figure 4 As shown, the mounting and fixing device in this embodiment includes: The tension steel anchor (4), as the foundation of the entire installation and fixing device, is pre-securely installed on the overhead line tower by tension clamp (6) and anti-loosening nut (3), providing a stable starting connection point.

[0139] The current guide plate (5) is installed near the tension steel anchor (4) to guide the current and prevent damage to the sensor and data processing unit caused by factors such as lightning strikes.

[0140] The large triangular connecting plate (1) is connected to the tension steel anchor (4) by bolts. As the core component connecting various components, it has multiple bolt holes, providing flexible installation and adjustment space.

[0141] The double parallel hanging plate (7) is fixed to the large triangular connecting plate (1) by bolts, and has connecting holes. The U-shaped hanging ring (2) is connected to the double parallel hanging plate (7) through the connecting holes to form a flexible connection point.

[0142] The single-joint mounting plate (13) is connected to the large triangular connecting plate (1) at one end by bolts, and to one end of the compensating chain fitting at the other end. The single-joint mounting plate (13) is equipped with an elevation adjustment column (14) and an annular bolt (15). By rotating the annular bolt (15), the extension length of the elevation adjustment column (14) can be adjusted, thereby adjusting the elevation angle of the single-joint mounting plate (13), and thus adjusting the installation angle of the entire device to adapt to different tower and conductor angles.

[0143] The compensating chain fitting is connected at one end to the single-joint mounting plate (13), at the other end to the bowl-head mounting plate (10), and finally to the wire clamping mechanism. The compensating chain fitting is used to absorb and buffer the vibration and impact of the wire (12) and protect the tension sensor (8) from damage.

[0144] The tension sensor (8) is connected to the data processing unit through the sensing wire (9) and is installed on the compensation chain fitting to directly bear the tension of the wire (12).

[0145] Extension rod (16): The overall length of the connecting mechanism can be adjusted by extending the extension rod (16) according to the on-site installation requirements.

[0146] The wire clamping mechanism includes a wire clamp (11) and a wedge-shaped wire groove. The wire clamp (11) clamps the wire (12) with bolts, and the wedge-shaped wire groove is fitted onto the wire clamp (11) and has a slider inside. When the wire (12) is under force, the slider slides in the wedge-shaped wire groove, clamping the wire (12) more tightly and preventing the wire (12) from slipping.

[0147] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of this application. Any specific values ​​in all examples shown and discussed herein should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0148] Furthermore, it should be noted that the use of terms such as "first" and "second" is merely for ease of distinction, and unless otherwise stated, these terms have no special meaning and therefore should not be construed as limiting the scope of protection of this application.

[0149] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A stress monitoring node installed on an overhead line tower, characterized in that, include: The stress acquisition unit includes a tension sensor (8), which is installed at the connection between the overhead line tower and the conductor (12) to convert the tension change of the conductor (12) into an electrical signal. A data processing unit is connected to the stress acquisition unit. The data processing unit includes a microprocessor. Before the electrical signal enters the microprocessor, it is filtered by a hardware circuit of an RC filter or an active filter. The data processing unit is used to determine whether the tensile force exceeds a preset threshold and to generate a warning signal when the tensile force exceeds the preset threshold. A wireless communication unit, connected to the data processing unit, is used to transmit the warning signal outward; The mounting and fixing device is used to fix the stress acquisition unit, the data processing unit and the wireless communication unit to the conductor (12) connection of the overhead line tower; The mounting and fixing device includes a connecting mechanism and a wire (12) clamping mechanism; The connecting mechanism includes a large triangular connecting plate (1), a connecting hanging plate, a double parallel hanging plate (7), a single hanging plate (13), a U-shaped hanging ring, a compensating chain fitting, and an extension rod (16); the single hanging plate (13) is provided with an elevation angle adjustment column (14) and a ring bolt (15) for adjusting the elevation angle of the single hanging plate (13) to adjust the installation angle of the stress monitoring node; the tension sensor (8) is installed on the compensating chain fitting; The wire (12) clamping mechanism includes a wire clamp (11) and a wedge-shaped wire groove, the inner surface of which is coated with a graphene nano-anti-corrosion coating.

2. The stress monitoring node installed on an overhead line tower according to claim 1, characterized in that: The tension sensor (8) is a piezoelectric tension sensor or a fiber optic tension sensor.

3. The stress monitoring node installed on an overhead line tower according to claim 1, characterized in that: The wireless communication unit adopts an NB-IoT communication module or a LoRa communication module.

4. The stress monitoring node installed on an overhead line tower according to claim 1, characterized in that: The stress monitoring node also includes a power supply unit, which consists of a solar cell and an energy storage battery.

5. The stress monitoring node installed on an overhead line tower according to claim 1, characterized in that: The stress monitoring node also includes a wind speed sensor and a temperature sensor.

6. The stress monitoring node installed on an overhead line tower according to claim 1, characterized in that: The stress monitoring node also includes a tilt sensor.

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