A non-contact power transmission tower bolt loosening detection device
By using a non-contact transmission tower bolt loosening detection device with a microphone array and angle adjustment device, the problems of low detection accuracy and environmental interference in the existing technology are solved, and efficient and accurate bolt loosening detection is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HONGHE POWER SUPPLY BUREAU OF YUNNAN POWER GRID
- Filing Date
- 2025-06-24
- Publication Date
- 2026-07-07
AI Technical Summary
Existing technologies are insufficient for efficiently and accurately detecting loose bolts on power transmission towers. In particular, manual inspections are difficult in complex environments, and drone inspections are easily affected by vibration, leading to inaccurate test data.
A non-contact transmission tower bolt loosening detection device is adopted, which includes a physical isolation shield, an acoustic detection module and a drone mount. It uses a microphone array to collect sound signals and combines angle adjustment and vibration reduction components to achieve long-distance, high-precision bolt loosening detection.
It enables long-distance, high-precision, and interference-resistant detection of loose bolts on power transmission towers in complex environments, improving detection efficiency and accuracy while reducing manpower and material costs.
Smart Images
Figure CN224471244U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of power transmission tower bolt loosening detection technology, and in particular to a non-contact power transmission tower bolt loosening detection device. Background Technology
[0002] In the operation and maintenance of power transmission lines, loose bolts on transmission towers seriously affect the safe and stable operation of the lines. Currently, commonly used infrared and ultraviolet thermography techniques for detecting loose bolts have limitations. In the early stages of bolt loosening, if there is no obvious discharge or heating phenomenon, the temperature change is slight, making it difficult for these methods to accurately detect whether the bolts are loose, failing to meet the stringent accuracy requirements of power operation and maintenance. While manual inspection can detect problems to some extent, its efficiency is extremely low. Transmission lines are widely distributed, and manual inspection requires significant manpower, material resources, and time. Moreover, in complex terrains such as mountainous and forested areas, and under adverse weather conditions, the difficulty and danger of manual inspection increase significantly, making it difficult to ensure a comprehensive and timely detection of the condition of all tower bolts.
[0003] Existing methods utilize drones equipped with inspection devices for power transmission line inspections, but the vibrations generated during flight can interfere with the inspection sensors, leading to inaccurate data. Furthermore, existing inspection devices have shortcomings in terms of inspection distance, accuracy, and adaptability to complex environments.
[0004] Based on this, this utility model proposes a non-contact transmission tower bolt loosening detection device to achieve long-distance, high-precision, and interference-resistant non-contact transmission tower bolt loosening detection. Utility Model Content
[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a non-contact transmission tower bolt loosening detection device, enabling long-distance, high-precision, and interference-resistant non-contact transmission tower bolt loosening detection.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] A non-contact transmission tower bolt loosening detection device includes: a physical isolation shield, an acoustic detection module disposed inside the physical isolation shield, a drone hanger rotatably connected to the physical isolation shield, and a transmission line; the physical isolation shield is a rectangular shell with an opening at one end, and the acoustic detection module is disposed inside the opening of the physical isolation shield;
[0008] The drone mount includes: a connecting bracket, a shock-absorbing component located at the bottom of the connecting bracket, a connecting seat located at the bottom of the shock-absorbing component, and an angle adjustment device detachably connected to the connecting seat; the connecting seat is electrically connected to the acoustic detection module, the angle adjustment device, and the drone respectively; one end of the transmission line is electrically connected to the connecting seat, and the other end is electrically connected to the drone.
[0009] Preferably, the angle adjustment device includes: a connecting buckle detachably connected to the connecting seat; a left-right angle adjustment motor disposed within the connecting buckle; a U-shaped clip fixedly connected at the top to the output shaft of the left-right angle adjustment motor; and two up-down angle adjustment motors whose output shafts are respectively fixedly connected to the bottom of the branches of the U-shaped clip; the two up-down angle adjustment motors are fixedly connected to the outside of a physical isolation shield; the physical isolation shield is placed between the branches of the U-shaped clip; the connecting seat is electrically connected to the connecting buckle; and the connecting buckle is electrically connected to the left-right angle adjustment motor, the up-down angle adjustment motor, and the acoustic detection module, respectively.
[0010] Preferably, the acoustic detection module includes: a microphone array, a signal amplification circuit connected to the input and output of the microphone array, a filter circuit connected to the input and output of the signal amplification circuit, and a signal acquisition card connected to the input and output of the filter circuit; the signal acquisition card is used to convert the output signal of the filter circuit into a digital signal; the signal acquisition card is electrically connected to the connection card.
[0011] Preferably, the microphone array has a high-definition camera imaging module at its center, and the high-definition camera imaging module is electrically connected to the connecting clip.
[0012] Preferably, the output shaft of the left and right angle adjustment motor is provided with a left and right angle adjustment gear, which is fixedly connected to the top of the U-shaped card; the output shafts of the two up and down angle adjustment motors are each provided with an up and down angle adjustment gear, which is fixedly connected to the bottom of the branch of the U-shaped card respectively.
[0013] Preferably, the physical isolation shield includes an insulating shield layer and a metal shield layer, with the metal shield layer placed between the two insulating shield layers.
[0014] Preferably, the connecting bracket includes: an upper bracket, a lower bracket, and a mounting plate; the shock absorption component is installed between the upper bracket and the lower bracket, the mounting plate is located above the upper bracket, and the mounting plate is detachably connected to the drone.
[0015] Preferably, one end of the transmission line is a fixed interface and the other end is a communication interface. The fixed interface is electrically connected to the connector and the communication interface is electrically connected to the UAV.
[0016] This utility model discloses a non-contact detection device for loose bolts on power transmission towers, which has the following beneficial effects.
[0017] This utility model includes: a physical isolation shield, an acoustic detection module housed within the physical isolation shield, a drone mount rotatably connected to the physical isolation shield, and a transmission line; the acoustic detection module is used to collect sound signals generated by loose transmission tower bolts and transmit them to the drone; the drone mount includes: a connecting bracket, a shock-absorbing component, a connecting seat, and an angle adjustment device; the angle adjustment device is used to adjust the direction of the acoustic detection module so that it can be aligned with transmission tower bolts at different positions and angles; the physical isolation shield includes an insulating shield layer and a metal shield layer, with the metal shield layer placed between the two insulating shield layers. The metal shield layer effectively shields against external electromagnetic interference, preventing external electromagnetic fields from affecting the internal circuitry and sensors of the detection device. The insulating shield layer isolates external electric field interference, protecting the internal circuitry; the acoustic detection module uses a microphone array with a circular array layout, utilizing the time and phase differences of sound reaching different microphones to accurately locate the source of the sound, thereby determining the specific location of the loose bolt; thus achieving long-distance, high-precision, and interference-resistant non-contact detection of loose transmission tower bolts. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model.
[0019] Figure 2 This is a schematic diagram of the connection structure between the angle adjustment device and the physical isolation shield of this utility model.
[0020] Figure 3 This is a cross-sectional structural diagram of the acoustic detection module and the physical isolation shield of this utility model.
[0021] Figure 4 This is a schematic diagram of the connection structure between the drone mount and the transmission line of this utility model.
[0022] Figure 5 This is a schematic diagram of the structure of the drone mounting bracket of this utility model.
[0023] Figure 6 This is a schematic diagram of the angle adjustment device of this utility model.
[0024] Figure 7 This is another schematic diagram of the angle adjustment device of this utility model.
[0025] Figure 8 This is a circuit diagram of the signal amplification circuit of this utility model.
[0026] Figure 9 This is a circuit diagram of the filter circuit of this utility model.
[0027] In the attached diagram: 1. Acoustic detection module; 11. Microphone array; 12. Signal amplification circuit; 13. Filtering circuit; 14. High-definition camera imaging module; 15. Signal acquisition card; 2. Physical isolation shield; 21. Insulating shield layer; 22. Metal shield layer; 3. UAV mount; 31. Connecting bracket; 311. Upper bracket; 312. Lower bracket; 313. Mounting plate; 32. Shock absorption component; 33. Connecting seat; 34. Angle adjustment device; 341. Connecting buckle; 342. U-shaped clip; 343. Left and right angle adjustment motor; 344. Up and down angle adjustment motor; 345. Left and right angle adjustment gear; 346. Up and down angle adjustment gear; 4. Transmission line; 41. Fixed interface; 42. Communication interface. Detailed Implementation
[0028] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended to limit the scope of protection of this application.
[0029] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.
[0030] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.
[0031] Unless otherwise specified, the use of terms such as “comprising,” “including,” “having,” or other similar expressions in this application is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a list of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.
[0032] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this application, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. For those skilled in the art to which this application pertains, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances. Example 1
[0033] Please refer to Figures 1 to 4 A non-contact transmission tower bolt loosening detection device includes: a physical isolation shield 2, an acoustic detection module 1 disposed inside the physical isolation shield 2, a drone hanger 3 rotatably connected to the physical isolation shield 2, and a transmission line 4; the physical isolation shield 2 is a rectangular shell with an opening at one end, and the acoustic detection module 1 is disposed inside the opening of the physical isolation shield 2;
[0034] In this embodiment, the acoustic detection module 1 is used to collect the sound signal generated by the loosening of the transmission tower bolts and transmit it to the drone.
[0035] The drone mount 3 includes: a connecting bracket 31, a shock-absorbing component 32 disposed at the bottom of the connecting bracket 31, a connecting seat 33 disposed at the bottom of the shock-absorbing component 32, and an angle adjustment device 34 detachably connected to the connecting seat 33; the connecting seat 33 is electrically connected to the acoustic detection module 1, the angle adjustment device 34, and the drone respectively; one end of the transmission line 4 is electrically connected to the connecting seat 33, and the other end is electrically connected to the drone. In this embodiment, the shock-absorbing component 32 is a rubber pad.
[0036] In this embodiment, the drone mount 3 is used to securely connect the non-contact transmission tower bolt loosening detection device to the bottom of the drone, and the angle adjustment device 34 in the drone mount 3 is used to adjust the direction of the acoustic detection module 1 so that the acoustic detection module 1 can be aligned with transmission tower bolts at different positions and angles.
[0037] Preferably, in this embodiment, the physical isolation shield 2 includes an insulating shielding layer 21 and a metal shielding layer 22, with the metal shielding layer 22 positioned between the two insulating shielding layers 21. The metal shielding layer 22 effectively shields against external electromagnetic interference, preventing external electromagnetic fields from affecting the internal circuitry and sensors of the detection device. The insulating shielding layer 21 isolates external electric field interference while protecting the internal circuitry.
[0038] Preferably, in this embodiment, the connecting bracket 31 includes: an upper bracket 311, a lower bracket 312, and a mounting plate 313; the shock absorption component 32 is installed between the upper bracket 311 and the lower bracket 312, the mounting plate 313 is located above the upper bracket 311, and the mounting plate 313 is detachably connected to the drone. Specifically, the mounting plate 313 is connected to the drone by bolts.
[0039] Preferably, in this embodiment, one end of the transmission line 4 is a fixed interface 41 and the other end is a communication interface 42. The fixed interface 41 is electrically connected to the connector 33, and the communication interface 42 is electrically connected to the UAV. Example 2
[0040] Based on Example 1, such as Figure 2 , Figure 5 , Figure 6 and Figure 7 As shown, in this preferred embodiment, the angle adjustment device 34 includes: a connecting buckle 341 detachably connected to the connecting seat 33; a left-right angle adjustment motor 343 disposed within the connecting buckle 341; a U-shaped clip 342 fixedly connected to the output shaft of the left-right angle adjustment motor 343 at its top; and two up-down angle adjustment motors 344 whose output shafts are respectively fixedly connected to the bottom of the branches of the U-shaped clip 342. The two up-down angle adjustment motors 344 are fixedly connected to the outside of the physical isolation shield 2. The physical isolation shield 2 is placed between the branches of the U-shaped clip 342. The connecting seat 33 is electrically connected to the connecting buckle 341, and the connecting buckle 341 is electrically connected to the left-right angle adjustment motor 343, the up-down angle adjustment motor 344, and the acoustic detection module 1, respectively.
[0041] like Figure 6 and Figure 7 As shown, in this preferred embodiment, the output shaft of the left and right angle adjustment motor 343 is provided with a left and right angle adjustment gear 345, which is fixedly connected to the top of the U-shaped card 342; the output shafts of the two up and down angle adjustment motors 344 are each provided with an up and down angle adjustment gear 346, which is fixedly connected to the bottom of the branch of the U-shaped card 342 respectively.
[0042] like Figure 5 and Figure 6 As shown, the bottom of the connector 33 is provided with a signal connection female port, and the connector buckle 341 is provided with a signal connection male port. The signal connection female port and the signal connection male port cooperate with each other. The signal connection female port is electrically connected to the transmission line 4, and the signal connection male port is electrically connected to the left and right angle adjustment motor 343, the up and down angle adjustment motor 344, the acoustic detection module 1, and the high-definition camera imaging module 14, respectively. The connector 33 and the connector buckle 341 are connected by bolts. In this embodiment, the connector 33 has a through hole, and the bolt passes through the through hole to connect the connector buckle 341 and the connector 33.
[0043] Preferably, in this embodiment, the acoustic detection module 1 includes: a microphone array 11, a signal amplification circuit 12 connected to the input and output of the microphone array 11, a filter circuit 13 connected to the input and output of the signal amplification circuit 12, and a signal acquisition card 15 connected to the input and output of the filter circuit 13; the signal acquisition card 15 is used to convert the output signal of the filter circuit 13 into a digital signal; the signal acquisition card 15 is electrically connected to the connecting clip 341. In this embodiment, the microphone array 11 is a commercially available Microflown AVISA Vector array with 128 channels; the signal acquisition card 15 is a commercially available MCC USB.
[0044] In this embodiment, the microphone array 11 is used to collect the sound signal generated by the loosening of bolts on the transmission tower. It has a wide frequency response characteristic and can accurately capture sound within the frequency range of 2kHz to 48kHz. The signal amplification circuit 12 amplifies the sound signal collected by the microphone array 11. The filtering circuit 13 effectively removes environmental noise and other interference signals, making the sound signal purer. The signal acquisition card 15 converts the analog sound signal into a digital signal for subsequent digital processing and analysis. It should be noted that the microphone array 11 adopts a circular array layout, utilizing the time difference and phase difference of sound reaching different microphones to accurately locate the sound source, thereby determining the specific location of the loose bolts. It should also be noted that the signal amplification circuit 12 and the filtering circuit 13 are existing technologies. Figure 8 and Figure 9 The circuit diagrams of signal amplification circuit 12 and filter circuit 13 are given.
[0045] Preferably, in this embodiment, a high-definition camera imaging module 14 is provided at the center of the microphone array 11, and the high-definition camera imaging module 14 is electrically connected to the connecting clip 341. The high-definition camera imaging module 14 is a commercially available RunCam Hybrid. The high-definition camera imaging module 14, together with the microphone array 11, realizes data acquisition and imaging. When there is an anomaly, the high-definition camera imaging module 14 can visualize the fault point on the UAV's flight control terminal, forming a colored light spot to indicate the location of the anomaly to the staff.
[0046] The following describes the workflow of the non-contact transmission tower bolt loosening detection device. A drone carrying the device flies to the vicinity of the transmission tower. The acoustic detection module 1 begins operation, and the microphone array 11 collects surrounding sound signals, including the sound of loose transmission tower bolts and ambient noise. After being amplified by the signal amplification circuit 12 and filtered by the filtering circuit 13 to remove interference, the sound signals are converted into digital signals by the signal acquisition card 15 and transmitted to the drone's data processing unit. During this process, the direction of the acoustic detection module 1 is adjusted by the angle adjustment device 34, allowing it to be aligned with transmission tower bolts at different positions and angles. In the drone's data processing unit, features are extracted from the collected sound signals. By analyzing the frequency, amplitude, phase, and other characteristic parameters of the sound, combined with machine learning algorithms or a preset sound feature library, it is determined whether the sound is caused by loose bolts. If the sound is determined to be from loose bolts, the microphone array 11 is further used to calculate the direction and distance of the sound source, determining the specific location of the loose bolt. The drone transmits the processed data to the ground control center in real time via the wireless communication module. Ground control center staff can visually view the test results and pinpoint the location of loose bolts. Based on this information, staff can promptly dispatch maintenance personnel to address the loose bolts, enabling rapid detection and precise maintenance of loose bolts on transmission towers, effectively ensuring the safe and stable operation of transmission lines.
[0047] It should be noted that the microphone array 11 adopts a circular array layout, utilizing the time difference and phase difference of sound reaching different microphones to achieve accurate location of the sound source. Specifically, using a circular array of microphones and utilizing the time difference and phase difference of sound reaching different microphones is existing technology. Any method that can utilize the time difference and phase difference of sound reaching different microphones for location can be used. As an example in this embodiment, the target location method in the Chinese invention patent "A Sound Target Location Method Based on a Uniform Concentric Circular Microphone Array" can be used for location. It should be emphasized that the above description of the microphone array 11 adopting a circular array layout and utilizing the time difference and phase difference of sound reaching different microphones to achieve accurate location of the sound source is only to indicate that it is existing technology. The computer programs involved are all known and do not include any improvement to the method itself.
[0048] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Substitutions may include replacements for some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made based on the technical solution and inventive concept of this utility model should all be covered within the scope of protection of this utility model.
Claims
1. A non-contact transmission tower bolt loosening detection device, characterized in that, include: Physical isolation shield, acoustic detection module installed inside the physical isolation shield, drone hanger rotatably connected to the physical isolation shield, and transmission line; The physical isolation shield is a rectangular shell with an opening at one end, and the acoustic detection module is located inside the opening of the physical isolation shield. The drone mount includes: a connecting bracket, a shock-absorbing component located at the bottom of the connecting bracket, a connecting seat located at the bottom of the shock-absorbing component, and an angle adjustment device detachably connected to the connecting seat; the connecting seat is electrically connected to the acoustic detection module, the angle adjustment device, and the drone respectively; one end of the transmission line is electrically connected to the connecting seat, and the other end is electrically connected to the drone.
2. The non-contact transmission tower bolt loosening detection device as described in claim 1, characterized in that, The angle adjustment device includes: a connecting buckle detachably connected to the connecting seat; a left-right angle adjustment motor disposed within the connecting buckle; a U-shaped clip fixedly connected to the output shaft of the left-right angle adjustment motor at the top; and two up-down angle adjustment motors whose output shafts are respectively fixedly connected to the bottom of the branches of the U-shaped clip. The two up-down angle adjustment motors are fixedly connected to the outside of a physical isolation shield. The physical isolation shield is placed between the branches of the U-shaped clip. The connecting seat is electrically connected to the connecting buckle, and the connecting buckle is electrically connected to the left-right angle adjustment motor, the up-down angle adjustment motor, and the acoustic detection module, respectively.
3. The non-contact transmission tower bolt loosening detection device as described in claim 2, characterized in that, The acoustic detection module includes: a microphone array, a signal amplification circuit connected to the input and output of the microphone array, a filter circuit connected to the input and output of the signal amplification circuit, and a signal acquisition card connected to the input and output of the filter circuit; the signal acquisition card is used to convert the output signal of the filter circuit into a digital signal; the signal acquisition card is electrically connected to the connection card.
4. The non-contact transmission tower bolt loosening detection device as described in claim 3, characterized in that, The microphone array is equipped with a high-definition camera imaging module at its center, which is electrically connected to the connecting clip.
5. The non-contact transmission tower bolt loosening detection device as described in claim 2, characterized in that, The output shaft of the left and right angle adjustment motor is equipped with a left and right angle adjustment gear, which is fixedly connected to the top of the U-shaped card; the output shafts of the two up and down angle adjustment motors are each equipped with an up and down angle adjustment gear, which is fixedly connected to the bottom of the branch of the U-shaped card respectively.
6. The non-contact transmission tower bolt loosening detection device as described in claim 1, characterized in that, The physical isolation shield includes an insulating shielding layer and a metal shielding layer, with the metal shielding layer placed between the two insulating shielding layers.
7. The non-contact transmission tower bolt loosening detection device as described in claim 1, characterized in that, The connecting bracket includes an upper bracket, a lower bracket, and a mounting plate; the shock absorption component is installed between the upper bracket and the lower bracket, the mounting plate is located above the upper bracket, and the mounting plate is detachably connected to the drone.
8. The non-contact transmission tower bolt loosening detection device as described in claim 1, characterized in that, One end of the transmission line is a fixed interface, and the other end is a communication interface. The fixed interface is electrically connected to the connector, and the communication interface is electrically connected to the UAV.