Interphase distance measuring device for overhead line

Abstract

The invention discloses an overhead line phase-to-phase distance measuring device, belongs to the technical field of electric power engineering, and aims at solving the problems that an existing measuring method is low in precision, poor in efficiency and large in environmental interference. According to the device, a measuring mechanism is hung on a first overhead conductor through an unmanned aerial vehicle, and the measuring mechanism is connected with a distance marking line and a climbing remote sensing mechanism; the climbing remote sensing mechanism automatically climbs to a second wire along a distance marking line, the vertical alignment with the measuring mechanism is adaptively calibrated through the top position adjusting platform, the inter-phase distance is accurately measured and calculated through the alternating frequency signal receiving and transmitting module, meanwhile, parameters such as the temperature and the wind speed are collected in real time through the integrated environment sensing unit, and data are synchronously transmitted to the operation terminal. According to the invention, non-contact high-precision measurement is realized, the working efficiency and safety are greatly improved, the method is suitable for overhead line phase-to-phase distance detection under different layouts and complex working conditions, and reliable data support is provided for power operation and maintenance.

Description

Technical Field

[0001] This application belongs to the field of power engineering, and specifically relates to a device for measuring the phase-to-phase distance of overhead lines. Background Technology

[0002] Overhead transmission lines are the core carriers of electrical energy transmission in power systems. Phase-to-phase distance, as a key technical parameter ensuring the safe and stable operation of these lines, directly affects conductor flashover prevention, wind deflection resistance, and power supply reliability. According to standards such as the "Design Code for 110kV~750kV Overhead Transmission Lines" and the "Operation Regulations for Overhead Transmission Lines," the phase-to-phase distance of lines at different voltage levels and under varying meteorological conditions must strictly meet safety thresholds. Insufficient spacing or abnormal changes due to external forces or environmental factors can easily trigger phase-to-phase flashovers, line tripping, and other accidents, causing widespread power outages and equipment damage.

[0003] However, current methods for measuring the phase-to-phase distance of overhead lines still face numerous technical bottlenecks and application limitations:

[0004] I. Inherent Defects of Contact Measurement Methods: Traditional manual climbing measurement requires maintenance personnel to ascend towers, which not only poses safety risks such as falls from heights and electric shocks, but also results in extremely low work efficiency, with a single line measurement taking 1-2 hours, making it difficult to meet the routine inspection needs of large-scale lines. Furthermore, manual measurement relies on tools such as steel tape measures and measuring ropes, and is affected by conductor sway and human error, limiting measurement accuracy to centimeter-level, unable to accurately capture millimeter-level spacing changes. In addition, contact between tools and conductors during measurement may damage the conductor insulation, creating potential safety hazards.

[0005] II. Bottlenecks in the application of non-contact measurement technology:

[0006] Laser / ultrasonic rangefinders: These devices rely on signals propagating in a straight line to measure distance. However, due to atmospheric refraction, dust, and other environmental factors, the signal is prone to scattering and attenuation. In complex terrain or areas with multiple intersecting conductors, it is difficult to accurately pinpoint the measurement point of the target conductor. When the conductor sways dynamically due to wind, the device cannot track its position in real time, requiring repeated adjustments to the measurement angle. This results in long measurement cycles, large data dispersion, and errors exceeding 20%, failing to meet high-precision measurement requirements.

[0007] Theodolites / total stations: require the establishment of measurement benchmarks on the ground. Due to factors such as terrain undulations, building obstructions, and excessive track spans, the line of sight is often obstructed. At the same time, the measurement results rely on manual interpretation of the traverse outline by personnel. The human error is significant due to the influence of observation angle and experience level. Furthermore, the data needs to be manually processed and analyzed afterward, making it impossible to achieve real-time synchronization and dynamic monitoring. It is not suitable for line measurement in complex scenarios such as crossing valleys and rivers. Summary of the Invention

[0008] This application provides an overhead line phase-to-phase distance measuring device, which uses a drone to precisely transport the measuring mechanism to the target location, and combines a climbing remote sensing device to autonomously ascend, descend and position itself along the high-altitude distance marking line, capturing the minimum distance between two conductors in real time, in order to solve the problems of existing measurement technology in terms of measurement accuracy, work efficiency, safety and environmental adaptability.

[0009] To achieve the above objectives, this application provides an overhead line phase-to-phase distance measuring device. A drone hangs the measuring mechanism on a first cable via a bracket hook. One end of the measuring mechanism is fixedly provided with a distance mark, and the other end of the distance mark is connected to a climbing remote sensing mechanism.

[0010] The climbing remote sensing mechanism includes a housing, on which a climbing component, a signal transceiver module, an environmental sensing unit, and a position adjustment platform are mounted. The climbing component moves in tandem with the distance markers, climbing segment by segment along the markers. The signal transceiver module interacts with the measuring mechanism via an AC signal to calculate the relative position. The environmental sensing unit collects temperature and wind speed data based on a timeline and synchronizes it to the display system in real time. The position adjustment platform is used to achieve vertical alignment between the signal transceiver module and the measuring mechanism to obtain the overhead line spacing.

[0011] In one embodiment, the climbing assembly includes a marking climbing wheel and a drive motor. The drive motor is fixedly disposed inside the housing, the marking climbing wheel is rotatably disposed on the housing and connected to the output shaft of the drive motor, and the distance marking is wound through the groove of the marking climbing wheel.

[0012] In one embodiment, the position adjustment platform consists of two sets of parallel rotating ball shafts, which are rotatably mounted on the top of the housing, forming a cable passage between them.

[0013] In one embodiment, the signal transceiver module includes a distance sensor receiver and an AC signal transmitter. The distance sensor receiver is disposed inside the housing, and a signal through hole is opened in the housing at the position corresponding to the distance sensor receiver. The AC signal transmitter is fixed to the side of the measuring mechanism, forming a bidirectional AC ranging loop.

[0014] In one embodiment, the environmental sensing unit integrates a temperature sensor and a wind speed sensor, is embedded in the housing, and is directly connected to the display system.

[0015] In one embodiment, the display system is equipped with a distance display screen, a temperature display screen, a wind speed display screen, and a time display screen to present multi-dimensional data such as inter-phase distance, environmental parameters, and measurement time in real time.

[0016] In one embodiment, a cable hook is provided on the top of the measuring mechanism, and a bracket hanging ring is provided on the cable hook.

[0017] In one embodiment, the climbing remote sensing mechanism further includes a processing unit, which embeds a microprocessor, a wireless communication module and a distance warning light. The microprocessor analyzes the overhead line spacing data according to the signal transceiver module and drives the climbing component to calculate the distance change rate. The wireless communication module interacts with the remote command through real-time data synchronization with the operating terminal via a hotspot.

[0018] The distance warning light stays on when the rate of change of the distance between phases of the overhead line is lower than a preset threshold, indicating to the operator that the current line spacing measurement is approaching the actual accurate value.

[0019] Compared with the prior art, the beneficial effects of this application are:

[0020] 1. Through the coordinated action of the position adjustment platform and the distance markings, the climbing remote sensing mechanism can automatically slide and calibrate along the guide wire, precisely aligning with the measuring mechanism to the same vertical plane, completely avoiding measurement offsets caused by wind disturbances, guide wire swaying, and terrain obstruction.

[0021] 2. The operation mode of using drones to mount the surveying mechanism eliminates the need for maintenance personnel to climb towers or set up ground benchmarks, completely eliminating safety risks such as falls from heights and electric shocks. A single person can complete the entire operation. The automatic climbing and calibration function replaces manual point selection, significantly reducing the measurement time for a single line section compared to traditional methods, and significantly improving work efficiency.

[0022] The modular mounting design enables rapid assembly of the measuring mechanism and the drone, adapting to different models of industrial-grade drones and effectively reducing equipment investment and maintenance costs.

[0023] 3. Supports measurement requirements for various conductor layouts, such as vertical parallel arrangement and horizontal arrangement, and enables accurate measurement of complex crossing areas through drone wire winding operation and adjustment of climbing remote sensing mechanism. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 A schematic diagram of an overhead line phase-to-phase distance measuring device provided in this application;

[0026] Figure 2A schematic diagram of a climbing remote sensing mechanism for an overhead line phase-to-phase distance measuring device provided in this application;

[0027] Figure 3 This is a schematic diagram of the internal structure of a climbing remote sensing mechanism for an overhead line phase-to-phase distance measuring device provided in this application.

[0028] Explanation of reference numerals in the attached diagram: 1. UAV; 2. Bracket hook; 3. Bracket ring; 4. Cable hook; 5. Measuring mechanism; 6. Distance marking; 7. Climbing remote sensing mechanism; 8. Operating terminal; 9. Position adjustment platform; 10. Marking climbing wheel; 11. Distance warning light; 12. Distance sensor receiver; 13. Time display screen; 14. Temperature display screen; 15. Distance display screen; 16. Wind speed display screen. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application are described clearly and completely below. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are also within the scope of protection of this application.

[0030] See Figures 1 to 3 As shown, this application provides an overhead line phase-to-phase distance measuring device. The drone 1 hangs the measuring mechanism 5 on the first cable through the bracket hook 2. One end of the distance mark 6 is fixedly installed on the measuring mechanism 5, and the other end of the distance mark 6 is connected to the climbing remote sensing mechanism 7.

[0031] In this process, after selecting the two overhead lines to be measured, the staff attaches the measuring mechanism 5 to the drone 1 via the bracket hook 2. After the attachment is completed, the drone 1 takes off and the staff controls the position of the drone 1 to attach the measuring mechanism 5 to the first wire. Then, the staff controls the drone to hover at a safe distance.

[0032] The climbing remote sensing mechanism 7 automatically climbs along the distance marker 6 to the position of the second conductor. After reaching the second conductor, the climbing remote sensing mechanism 7 forms a sliding contact limit with the second conductor. At this time, the continued movement of the climbing remote sensing mechanism 7 generates a tension force on the distance marker 6. If the climbing remote sensing mechanism 7 is not in the same vertical plane as the measuring mechanism 5 at this time, the distance marker 6 will experience a skewed tension, causing the climbing remote sensing mechanism 7 and the measuring mechanism 5 to slide horizontally off-center on their respective conductors until they are re-aligned and stable in the same vertical plane. At this time, the distance marker 6 is taut, the climbing remote sensing mechanism 7 stops, and the distance between the measuring mechanism 5 and the climbing remote sensing mechanism 7 is the actual phase-to-phase distance between the two overhead lines. At the same time, the measuring mechanism 5 collects distance data and transmits it to the operating terminal 8. This design avoids measurement interference caused by wind disturbance, conductor sway, and terrain obstruction, making the phase-to-phase distance data accurate, stable, and reproducible.

[0033] It should be noted that the selection of the first conductor should be based on a comprehensive judgment of the conductor arrangement order and safe operation specifications in the actual working conditions, and priority should be given to sections with clear phase sequence, no crossing or crossing and appropriate span.

[0034] In the specific implementation process, there are two common working conditions: First, the two overhead lines to be measured are parallel conductors arranged vertically. In this case, the measuring mechanism 5 is attached to the upper conductor, and the climbing remote sensing mechanism 7 rises along the marking line to the lower conductor, and finally automatically calibrates to the minimum distance position. Second, the conductors are arranged horizontally. In this case, the drone 1 needs to control the measuring mechanism 5 to approach from the side of the second conductor and go around it from above, and then attach the measuring mechanism 5 to the first conductor, that is, to ensure that the distance marking line 6 goes around the second conductor, thereby providing a vertical climbing path for the climbing remote sensing mechanism 7, and enabling the climbing remote sensing mechanism 7 to make contact with the second conductor along the distance marking line 6, thereby completing the distance calibration measurement between the horizontally arranged conductors.

[0035] The climbing remote sensing mechanism 7 includes a housing, on which a climbing component, a signal transceiver module, an environmental sensing unit, and a position adjustment platform 9 are disposed. The climbing component moves in coordination with the distance marker 6, climbing segment by segment along the distance marker 6. The signal transceiver module interacts with the measuring mechanism 5 via an AC signal to calculate the relative position. The environmental sensing unit collects temperature and wind speed data based on a timeline and synchronizes it to the display system in real time. The position adjustment platform 9 is used to achieve vertical alignment between the signal transceiver module and the measuring mechanism 5 to obtain the overhead line spacing.

[0036] In this embodiment, after the measuring mechanism 5 completes the connection of the first guide wire, the climbing component starts to wind up the distance marker 6, thereby pulling the housing vertically upward along the distance marker 6 until the position adjustment platform 9 contacts the second guide wire and limits its movement. At this time, the signal transceiver module triggers a self-calibration program, and the climbing component dynamically fine-tunes the winding speed of the distance marker 6 based on its real-time feedback signal to ensure that the housing stops at the vertical point directly below the second guide wire. Subsequently, the position adjustment platform 9 slides along the second guide wire under the tension of the distance marker 6, adjusting the vertical alignment accuracy with the measuring mechanism 5 until the signal transceiver module measures the minimum stable distance value. At this point, the signal transceiver module locks the minimum distance value and triggers a data freeze command, and the display system synchronously refreshes and displays this distance value.

[0037] At the same time, the environmental sensing unit collects the temperature, wind speed and system running time at the current altitude and displays them through the screen display system.

[0038] Optionally, the climbing assembly includes a marking climbing wheel 10 and a drive motor. The drive motor is fixedly installed inside the housing, and the marking climbing wheel 10 is rotatably installed on the housing and connected to the output shaft of the drive motor. The distance marking 6 passes through the groove of the marking climbing wheel 10.

[0039] In this embodiment, the drive motor controls the speed and direction of the marking climbing wheel 10 via precise pulse control, ensuring a smooth and slip-free climbing process. During rotation, the marking climbing wheel 10 winds up the distance marking 6, simultaneously generating a slight clamping force to eliminate marking sag errors. A high-friction silicone layer is embedded in the groove of the marking climbing wheel 10 to prevent marking slippage and improve winding reliability. When the wheel climbs to the second guide and the position adjustment platform 9 contacts the second guide, the drive motor automatically slows down and adjusts its speed in conjunction with feedback from the signal transceiver module. This fine-tuning of the tension of the distance marking 6 achieves horizontal alignment between the housing and the measuring mechanism 5. After alignment, the drive motor locks in the minimum distance value via feedback from the signal transceiver module and enters standby mode.

[0040] It should be noted that the drive motor is an electromagnetic motor, which has high responsiveness and low power consumption. The electromagnetic motor integrates a Hall sensor, which can monitor the rotor position and rotation angle in real time to ensure millimeter-level positioning accuracy of the winding action.

[0041] The main control chip of the drive motor receives distance feedback signals from the signal transceiver module. As the distance change rate gradually decreases, it automatically reduces the pulse frequency and enters fine-tuning mode. When the distance change rate approaches zero and remains stable for 200ms, the main control chip determines that alignment is complete and immediately sends a lock-up command to the electromagnetic motor, cutting off the power output and activating the mechanical brake. At this time, the distance warning light 11 simultaneously changes from yellow to red, emitting a soft, constant illumination. The signal transceiver module locks the distance value at this moment, which is the actual phase-to-phase distance between the two conductors.

[0042] Optionally, the position adjustment platform 9 consists of two sets of parallel rotating ball shafts, which are rotatably mounted on the top of the housing, forming a cable passage between them.

[0043] The rotating ball bearings form a spherical mesh support structure, with an array of micro-protrusions on the surface of each set of rotating ball bearings to enhance frictional compatibility with the conductor surface. When the housing slides along the second conductor, the ball bearings adaptively rotate with the curvature of the conductor, eliminating lateral offset stress.

[0044] Optionally, the signal transceiver module includes a distance sensor receiver 12 and an AC signal transmitter. The distance sensor receiver 12 is disposed inside the housing, and a signal through hole is opened in the housing at the position corresponding to the distance sensor receiver 12. The AC signal transmitter is fixed to the side of the measuring mechanism 5 to form a bidirectional AC ranging circuit.

[0045] In this embodiment, the AC signal transmitter continuously transmits a modulated wave at a frequency of 2Hz. The distance sensor receiver 12 captures the reflected phase difference in real time, and outputs a distance value with a millisecond-level response after calculation by the built-in DSP chip. The inner wall of the signal through-hole is coated with absorbing material to effectively suppress multipath interference and ensure a ranging accuracy better than ±1.5mm in strong electromagnetic environments. A bidirectional loop synchronously verifies the timing deviation between transmission and reception and dynamically corrects the propagation speed of the 2Hz signal, thereby minimizing signal attenuation errors caused by environmental temperature drift and airflow disturbances.

[0046] Optionally, the environmental sensing unit integrates a temperature sensor and a wind speed sensor, embedded within the housing and directly connected to the display system. The temperature sensor and wind speed sensor collect real-time temperature, humidity, and wind speed data at the distance testing site and transmit them to the display system for display.

[0047] Optionally, the display system is configured with a distance display screen 15, a temperature display screen 14, a wind speed display screen 16, and a time display screen 13 to present multi-dimensional data such as phase distance, environmental parameters, and measurement time in real time.

[0048] In this embodiment, all screen display data is synchronously uploaded to the cloud database via the LoRa wireless module, with timestamps automatically bound, supporting historical data backtracking and multi-condition comparative analysis.

[0049] Optionally, a cable hook 4 is provided on the top of the measuring mechanism 5, and a bracket ring 3 is provided on the cable hook 4. The bracket hook 2 of the drone 1 is attached to the bracket ring 3 to achieve quick assembly of the measuring mechanism 5 and the drone 1. After the measuring mechanism 5 hovers over the target guide wire, the drone 1 is operated to attach the cable hook 4 to the first guide wire. After the attachment is completed, the drone 1 is further operated to detach the bracket hook 2 from the bracket ring 3, so that the measuring mechanism 5 can slide freely along the first guide wire.

[0050] Optionally, the climbing remote sensing mechanism 7 further includes a processing unit, which embeds a microprocessor, a wireless communication module, and a distance warning light 11. The microprocessor analyzes the overhead line spacing data according to the signal transceiver module and drives the climbing component to calculate the distance change rate. The wireless communication module achieves real-time data synchronization and remote command interaction with the operation terminal 8 through a hotspot.

[0051] The microprocessor analyzes the millisecond-level distance value output by the distance sensor receiver 12 in real time, calculates the phase-to-phase distance change rate, and thus performs closed-loop adjustment of the speed of the drive motor to ensure that the climbing remote sensing mechanism 7 can still accurately approach the minimum distance point under wind disturbance and wire sway.

[0052] The distance warning light 11 will remain lit when the rate of change of the distance between phases of the overhead line is lower than a preset threshold, indicating to the operator that the current line spacing measurement is approaching the actual accurate value.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them; although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An overhead line phase-to-phase distance measuring device, wherein a drone (1) hangs a measuring mechanism (5) on a first cable via a bracket hook (2), characterized in that: One end of the distance mark (6) is fixedly installed on the measuring mechanism (5), and the other end of the distance mark (6) is connected to the climbing remote sensing mechanism (7); The climbing remote sensing mechanism (7) includes a housing, on which a climbing component, a signal transceiver module, an environmental sensing unit, and a position adjustment platform (9) are provided. The climbing component moves in coordination with the distance marker (6) and climbs segment by segment along the distance marker (6). The signal transceiver module interacts with the measuring mechanism (5) to calculate the relative position through an AC signal. The environmental sensing unit collects temperature and wind speed data based on a timeline and synchronizes it to the display system in real time. The position adjustment platform (9) is used to achieve vertical alignment between the signal transceiver module and the measuring mechanism (5) to obtain the overhead line spacing.

2. The overhead line phase-to-phase distance measuring device according to claim 1, characterized in that: The climbing assembly includes a marking climbing wheel (10) and a drive motor. The drive motor is fixedly installed inside the housing. The marking climbing wheel (10) is rotatably installed on the housing and connected to the output shaft of the drive motor. The distance marking (6) passes through the groove of the marking climbing wheel (10).

3. The overhead line phase-to-phase distance measuring device according to claim 1, characterized in that: The position adjustment platform (9) consists of two sets of parallel rotating ball shafts, which are rotatably mounted on the top of the housing, forming a cable passage between them.

4. The overhead line phase-to-phase distance measuring device according to claim 1, characterized in that: The signal transceiver module includes a distance sensor receiver (12) and an AC signal transmitter. The distance sensor receiver (12) is disposed inside the housing. A signal through hole is opened in the housing at the position corresponding to the distance sensor receiver (12). The AC signal transmitter is fixed to the side of the measuring mechanism (5) to form a bidirectional AC ranging circuit.

5. The overhead line phase-to-phase distance measuring device according to claim 1, characterized in that: The environmental sensing unit integrates a temperature sensor and a wind speed sensor, is embedded in the housing, and is directly connected to the display system.

6. The overhead line phase-to-phase distance measuring device according to claim 1, characterized in that: The display system is equipped with a distance display screen (15), a temperature display screen (14), a wind speed display screen (16), and a time display screen (13) to present multi-dimensional data such as phase distance, environmental parameters, and measurement time in real time.

7. The overhead line phase-to-phase distance measuring device according to claim 1, characterized in that: A cable hook (4) is provided on the top of the measuring mechanism (5), and a bracket hanging ring (3) is provided on the cable hook (4).

8. A device for measuring the phase-to-phase distance of an overhead line according to any one of claims 1-7, characterized in that: The climbing remote sensing mechanism (7) also includes a processing unit, which is embedded with a microprocessor, a wireless communication module and a distance warning light (11). The microprocessor analyzes the overhead line spacing data according to the signal transceiver module and drives the climbing component to calculate the distance change rate. The wireless communication module interacts with the operation terminal in real time (8) through hotspot data synchronization and remote command interaction. The distance warning light (11) will continue to illuminate when the rate of change of the distance between phases of the overhead line is lower than a preset threshold, prompting the operator that the current line spacing measurement is approaching the actual accurate value.

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