Intelligent health detection method for transmission line tower

Abstract

The invention provides an intelligent health detection method for a power transmission line tower, and belongs to the technical field of tower detection, and the method comprises the steps: carrying out the shooting and scanning of the tower through a receiving end, generating a model of the tower according to the determined information, and feeding back the positions of a transmitting end and the receiving end to the model in real time. And determining the thickness of the component penetrated by the detection signal according to the strength of the detection signal received by the receiving end, setting the thickness as the actual length, picking up the thickness of the model penetrated by the connecting line between the transmitting end and the receiving end at the current time point from the model, and setting the thickness as the simulation length. If the simulated length is greater than the actual length, a crack appears in the component or a gap exists at the joint of the two components; and changing the position of a receiving end, determining the distribution and shape of cracks and gaps in a certain range, and finally deducing the occurred problems and performing early warning. According to the intelligent health detection method for the power transmission line tower, the state of the tower can be accurately and reliably evaluated, and the problem is prevented from being further serious.

Description

Technical Field

[0001] The present invention belongs to the technical field of pole tower detection, and more specifically, relates to a method for intelligently detecting the health of a transmission line pole tower. Background Art

[0002] Electricity needs to be transmitted through poles and transmission lines. The transmission lines are stably positioned above the ground through poles to avoid being affected by the external environment. Therefore, the condition of the poles directly affects the normal use of the entire transmission line. In view of the above situation, it is necessary to regularly inspect the poles to ensure that there are no problems with the components on the poles and the connections between adjacent components.

[0003] In the existing inspection methods, the appearance and shape of the tower are mostly inspected by personnel controlling drones. However, during the use of the tower, cracks may occur inside the components used for support and balance due to plastic deformation, and the connected components may become loose and the connection may fail due to the influence of the external environment. However, the existing methods cannot accurately inspect the above-mentioned faults, the data reference significance is poor, and it is impossible to warn of possible problems in advance. Summary of the invention

[0004] The purpose of the present invention is to provide a transmission line tower health intelligent detection method, aiming to solve the problem that faults cannot be accurately checked, data reference significance is poor, and possible problems cannot be warned in advance.

[0005] To achieve the above object, the technical solution adopted by the present invention is: to provide a transmission line tower health intelligent detection method, comprising: A transmitting end is installed on one side of the pole tower, and the transmitting end can emit a detection signal whose intensity will be attenuated to different degrees when passing through components of different thicknesses; the pole tower is photographed and scanned by the receiving end, and a model of the pole tower is generated according to the determined information, and the positions of the transmitting end and the receiving end are fed back to the model in real time; the thickness of the component passed by the detection signal is determined according to the strength of the detection signal received by the receiving end and is set as the actual length, and the thickness of the model passed by the line connecting the transmitting end and the receiving end at the current time point is picked up in the model and set as the simulated length; if the simulated length is greater than the actual length, it indicates that cracks appear inside the component or there is a gap at the connection between two components; the position of the receiving end is changed to determine the distribution and shape of cracks and gaps within a certain range, and finally the problems that have occurred are inferred and an early warning is issued.

[0006] In a possible implementation, installing a transmitting end on one side of a pole tower includes: The transmitting end sends the detection signal of the same strength to the outside, and the strength of the detection signal will not be attenuated when the detection signal does not pass through any component.

[0007] In a possible implementation manner, before photographing and scanning the tower through the receiving end, the method further includes: The receiving end is stably in the air and receives the detection signal, and calculates the current spatial position and angle of the receiving end in real time; The receiving end photographs the tower at different angles, integrates the photographed multiple pictures and generates the model.

[0008] In a possible implementation manner, generating the model of the tower according to the determined information includes: Communication is established between the transmitting end and the receiving end, and in the process of changing the spatial position of the receiving end, the size of the model is checked according to the shielding of the communication by the tower.

[0009] In a possible implementation, feeding back the positions of the transmitting end and the receiving end to the model in real time includes: The model is marked in a spatial coordinate system, and the positions of the transmitting end and the receiving end relative to the pole tower are fed back in real time on the spatial coordinate system.

[0010] In a possible implementation, determining the thickness of the component through which the detection signal passes according to the strength of the detection signal received by the receiving end and setting the thickness as the actual length includes: Identify and record the current position of the receiving end, infer the attenuation degree of the detection signal received by the receiving end based on its strength, analyze the thickness of the component passed by the detection signal at the current angle through the attenuation degree and use this thickness as the actual length.

[0011] In a possible implementation, picking up the thickness of the model passed by the line connecting the transmitting end and the receiving end at the current time point in the model and setting it as the simulation length includes: After the actual length is determined, a line is drawn between the position marking points of the current transmitting end and the receiving end in the spatial coordinate system, and the length of the model through which the line passes is determined and used as the simulated length.

[0012] In a possible implementation, if the simulated length is greater than the actual length, it indicates that a crack occurs inside the component or a gap exists at a connection between two components, including: If the simulated length is greater than the actual length, it is inferred that there may be cracks inside the component, or a gap appears at the connection between the two components; the above problems may lead to plastic deformation and damage of the component and failure of the connection between the two components.

[0013] In a possible implementation, the changing the position of the receiving end, determining the distribution and shape of cracks and gaps within a certain range, and finally inferring the problems and issuing warnings include: The position of the receiving end is adjusted within a certain range, and the spatial position of the receiving end is recorded when the simulated length is greater than the actual length again.

[0014] In a possible implementation, determining the distribution and shape of cracks and gaps within a certain range, and ultimately inferring the problems that have occurred and issuing warnings includes: The recorded position of the receiving end and the difference between the simulated length and the actual length are visualized in the spatial coordinate system according to the spatial position relationship between the transmitting end and the receiving end at that time; the cause of the problem is inferred based on the shape and distribution of the difference.

[0015] The beneficial effect of the intelligent health detection method for power transmission line towers provided by the present invention is that: compared with the prior art, the intelligent health detection method for power transmission line towers provided by the present invention firstly shoots and scans the towers through the receiving end, generates a model of the towers according to the determined information, and feeds back the positions of the transmitting end and the receiving end to the model in real time. According to the strength of the detection signal received by the receiving end, the thickness of the component through which the detection signal passes is determined and set as the actual length, and the thickness of the model passed by the line connecting the transmitting end and the receiving end at the current time point is picked up in the model and set as the simulated length.

[0016] In actual application, if the simulated length is greater than the actual length, it indicates that cracks appear inside the component or there is a gap at the connection between two components; by changing the position of the receiving end, the distribution and shape of cracks and gaps within a certain range are determined, and finally the problem is inferred and an early warning is issued. The method provided in this application can accurately and reliably evaluate the status of the tower, and can provide timely early warning before problems occur, preventing the problem from becoming more serious. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1The present invention provides a flow chart of a method for intelligently detecting the health of a transmission line tower. DETAILED DESCRIPTION

[0019] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0020] See also Figure 1 The intelligent health detection method for power transmission line towers provided by the present invention is now described. The intelligent health detection method for power transmission line towers comprises: A transmitter is installed on one side of the tower, which can emit a detection signal whose intensity will be attenuated to different degrees when passing through components of different thicknesses; the tower is photographed and scanned by the receiving end, and a model of the tower is generated according to the determined information, and the positions of the transmitter and the receiving end are fed back to the model in real time; the thickness of the component passed by the detection signal is determined according to the strength of the detection signal received by the receiving end and is set as the actual length, and the thickness of the model passed by the line connecting the transmitter and the receiving end at the current time point is picked up in the model and set as the simulated length; if the simulated length is greater than the actual length, it indicates that cracks appear inside the component or there is a gap at the connection between the two components; the position of the receiving end is changed to determine the distribution and shape of cracks and gaps within a certain range, and finally the problems that have occurred are inferred and an early warning is issued.

[0021] The beneficial effect of the intelligent health detection method for power transmission line towers provided by the present invention is that: compared with the prior art, the intelligent health detection method for power transmission line towers provided by the present invention firstly shoots and scans the towers through the receiving end, generates a model of the towers according to the determined information, and feeds back the positions of the transmitting end and the receiving end to the model in real time. According to the strength of the detection signal received by the receiving end, the thickness of the component through which the detection signal passes is determined and set as the actual length, and the thickness of the model passed by the line connecting the transmitting end and the receiving end at the current time point is picked up in the model and set as the simulated length.

[0022] In actual application, if the simulated length is greater than the actual length, it indicates that cracks appear inside the component or there is a gap at the connection between two components; by changing the position of the receiving end, the distribution and shape of cracks and gaps within a certain range are determined, and finally the problem is inferred and an early warning is issued. The method provided in this application can accurately and reliably evaluate the status of the tower, and can provide timely early warning before problems occur, preventing the problem from becoming more serious.

[0023] Electricity is undoubtedly indispensable to modern life, and electricity must be transmitted through the power grid. Due to the wide geographical distribution and complex and diverse geological conditions in my country, power transmission lines are often affected by the external environment during operation. Among them, pole towers often slip, tilt, settle, crack, etc., which cause the pole towers to deform or tilt. After a period of time, the conductors of the newly erected lines will sag to varying degrees. When the sag is too large, it may swing greatly under the action of electric force during strong winds or faults, causing mixed lines and short circuits. At the same time, accidents may occur due to insufficient distance from the intersections, roads, and buildings below. The above accidents will cause significant economic losses to the country, so it is very important to maintain power lines, and line inspection is an important basis for power line maintenance. The implementation of line inspection directly restricts the overall maintenance level of power transmission and distribution lines and even the power grid.

[0024] At present, some inspection methods are large helicopters or drones. Although this method improves inspection efficiency and reduces inspection difficulty compared with traditional manual inspection methods, the aircraft is controlled by personnel and the flight is unstable. The target often passes quickly in the camera's field of view, and reliable data cannot be collected comprehensively, which increases the technical difficulty. Another disadvantage of using large helicopters or drones for inspection is that the cost is high and there are great limitations on the convenience of operation.

[0025] In addition, the current monitoring method for pole tower inclination is to install a large number of sensors on the lines or pole towers for detection. The disadvantage of this method is that too many sensors increase the complexity and instability of the system, and the system maintenance is difficult and costly.

[0026] In some embodiments of the intelligent health detection method for power transmission line towers provided in the present application, installing a transmitter on one side of the tower includes: The transmitting end sends out a detection signal of the same intensity to the outside, and the intensity will not be attenuated when the detection signal does not pass through any component.

[0027] At present, a considerable part of the transmission line project is located in mountainous areas, high mountains and high altitude areas, with harsh environments. During the transportation of tower materials by ropeway and the installation of towers, tower materials are easily hit. If the tower materials in the bolt hole area at the end of the angle steel or the end of the node plate are hit, it may cause deformation of the bolt hole, local micro-tear or loss of steel. In addition, for the already operating towers, if they are subjected to continuous and repeated breeze vibrations, the bolt connection area of ​​the connecting plate is also prone to partial fatigue damage, resulting in defects and damage such as micro-cracks. The above defects will lead to serious safety hazards in the tower structure.

[0028] At present, welding repair is generally used to deal with notches and cracks in tower materials that have been energized. However, this repair method lacks optimization of the force transmission mechanism based on stress analysis, and cannot effectively reduce the stress level in the damaged area, improve the stress state in the damaged area, and transfer the stress amplitude to the non-damaged area. At the same time, there is a lack of relevant measures to suppress potential damage that may develop during long-term operation to ensure the long-term operation reliability of the tower.

[0029] In some embodiments of the intelligent health detection method for power transmission line towers provided in the present application, before photographing and scanning the towers through the receiving end, the method further includes: The receiving end is stable in the air and receives the detection signal, and calculates the current spatial position and angle of the receiving end in real time.

[0030] The receiving end takes pictures of the tower at different angles, integrates the multiple pictures taken and generates a model.

[0031] At present, ultrasonic phased array flaw detection is mostly used to detect welds or base materials of metal workpieces. Ultrasonic phased array flaw detection is a method of detecting defects by using the characteristic that ultrasonic waves can penetrate into metal and reflect at the interface when entering another medium from one medium. When the ultrasonic beam emitted by the probe encounters a defect inside the metal, a reflected wave is generated and various scanning images are formed on the fluorescent screen. The position and equivalent of the defect can be determined based on the position, height and dynamic form of these scanning images, and the nature of the defect can be further inferred. However, this judgment conclusion generally requires the inspector to perform multiple inspection operations and combine experience to draw a conclusion, which is time-consuming and relies on the subjective judgment of the operator, and has poor reliability. However, the use of ultrasonic flaw detection has certain limitations and is not applicable to the method of this application.

[0032] In the traditional tower health video detection method, the relevant operation and inspection personnel need to hold the detection device to detect the tower at the bottom of the tower. More importantly, in order to improve the detection accuracy, multiple sensors need to be installed on the detection device, and the spatial position and posture changes of the detection device can be determined in real time through the cooperation of multiple sensors. More importantly, after obtaining the image and video data of the tower, the data needs to be processed and analyzed. The ultimate goal is to make a preliminary judgment on the status of the tower through video analysis.

[0033] It should be pointed out that the pole tower is made of multiple steel structures spliced ​​and welded together. The above structures may not be able to distinguish the connection between them and the internal conditions of the components from the appearance, and nuts and bolts are used to locate the pole tower. If the nuts are loose, it will have a significant impact on the stability of the entire pole tower. The above defects cannot be found through simple video analysis, so the existing detection methods have certain drawbacks and cannot analyze and explore the deep-seated problems.

[0034] In some embodiments of the intelligent health detection method for power transmission line towers provided in the present application, generating a tower model according to the determined information includes: Communication is established between the transmitter and the receiver. In the process of changing the spatial position of the receiver, the size of the model is checked according to the shielding of the tower to the communication.

[0035] In this application, it is necessary to be able to perform preliminary modeling of the overall structure of the tower. After the modeling is completed, the data that can be determined by the model needs to be combined with flaw detection at different angles to finally conduct an in-depth analysis and judgment on the health status of the tower. The determined data is highly reliable and has a certain directionality that can identify the area where the problem occurs. It also has a certain degree of portability. More importantly, it can avoid major accidents and ensure property safety.

[0036] In order to achieve the above technical effects, this application needs to build a model based on the data detected on the outside of the tower, so that the constructed model can truly reflect the size of each position of the tower. After the model is created, the tower needs to be inspected. The main purpose of the inspection is to determine whether there are cracks and gaps between different components and within a single component. Through the above analysis, it can be determined whether the component itself can remain stable and whether the connection between components is reliable. At this time, it is necessary to compare the data determined by the model.

[0037] In some embodiments of the intelligent detection method for the health of a transmission line tower provided in the present application, feeding back the positions of the transmitting end and the receiving end to the model in real time includes: The model is marked in the spatial coordinate system, and the positions of the transmitter and the receiver relative to the tower are fed back in real time in the spatial coordinate system.

[0038] The specific implementation method is to first fix the transmitter on the ground on one side of the tower. The transmitter can transmit a detection signal to the outside, and the receiver can receive the detection signal. Usually, the receiver needs to be installed on a drone, and the drone is used to adjust the spatial position and angle relative to the transmitter. In the process of the drone carrying the transmitter, the spatial position and angle of the transmitter can be fed back to the host computer in real time through corresponding calculations.

[0039] When applying this application, it is necessary to first construct a model of the pole tower. In order to achieve the above purpose, different photos are first taken at different angles by the receiving end. After the photos are taken, a rough appearance model can be obtained through existing technology. After the rough model is determined, in order to obtain more accurate data, real-time communication can be established between the transmitting end and the receiving end. According to the time when the components of the pole tower block the communication between the two and the change of the current receiving end position, the dimensions on the constructed model are finally checked.

[0040] In some embodiments of the intelligent detection method for the health of a transmission line tower provided in the present application, determining the thickness of a component through which the detection signal passes according to the strength of the detection signal received by the receiving end and setting it as the actual length includes: Identify and record the current position of the receiving end, infer the attenuation degree of the detection signal received by the receiving end based on its strength, analyze the thickness of the component passed by the detection signal at the current angle through the attenuation degree and use this thickness as the actual length.

[0041] It should be pointed out that the material of the tower is mostly steel. The degree of signal attenuation varies when the detection signal passes through steel of different thicknesses. The receiving end determines the strength of the detection signal in each direction and combines it with the current appearance thickness fed back by the model to finally determine whether there is a problem in a certain direction.

[0042] To make it easier to understand, first calibrate the created tower model in the spatial coordinate system, and then calibrate the transmitter and receiver in the spatial coordinate system according to the actual position. The change in the receiver's position will be fed back to the coordinate system in real time. At this time, the thickness of the tower component through which the line connecting the transmitter and receiver passes can be determined in real time in the spatial coordinate system based on the relative position of the transmitter and receiver. The attenuation of the detection signal can be inferred from the strength of the detection signal received by the receiver, and the thickness of the tower component through which the transmitter and receiver actually pass can be determined from the attenuation.

[0043] Because there will be no cracks or contact between the components in the model, by comparing the two data, possible faults can be analyzed.

[0044] In some embodiments of the intelligent detection method for health of transmission line towers provided in the present application, picking up the thickness of the model passed by the line connecting the transmitting end and the receiving end at the current time point in the model and setting it as the simulation length includes: After the actual length is determined, the position marking points of the current transmitting end and the receiving end are connected in the spatial coordinate system, and the length of the model passed by the connecting line is determined and used as the simulation length.

[0045] First, according to the actual situation, the position change of the receiving end is simulated in real time in the spatial coordinate system. In the spatial model, the transmitting end and the receiving end are connected, and then the length of the connection through the model is picked up, that is, the length of the corresponding component of the connection in the model, and the specific value of the above length is set as the simulation length. At this time, it is necessary to determine the strength of the detection signal emitted by the transmitting end through the receiving end, because if there is no obstruction between the transmitting end and the receiving end, the detection signal will not be attenuated. If there is an obstruction of components of different unit lengths between the two, then by finally determining the strength of the detection signal received by the receiving end, it is possible to infer the thickness of the component between the transmitting end and the receiving end at the current spatial angle.

[0046] After receiving the detection signal, the specific receiving end can feed back the received signal to the host computer, determine the strength of the current detection signal in the host computer, and then infer the thickness based on the strength. At this time, the thickness value is used as the actual length.

[0047] In some embodiments of the intelligent health detection method for power transmission line towers provided in the present application, if the simulated length is greater than the actual length, it indicates that cracks appear inside the component or there is a gap at the connection between two components, including: If the simulated length is greater than the actual length, it is inferred that there may be cracks inside the component or a gap at the connection between the two components; the above problems may lead to plastic deformation and damage of the component and failure of the connection between the two components.

[0048] If the simulated length is the same as the actual length, it proves that there are no cracks in the components through which the line between the transmitter and the receiver passes, that is, the line passes through the two components and there is no gap between the two components, indicating good contact. If the simulated length is greater than the actual length, since cracks and gaps cannot be simulated in the spatial coordinate system, this means that there are cracks or gaps inside the components at the actual connection point of the tower and between the two components that cannot be observed from the outside. At this time, it can be determined that there may be problems that have not been discovered yet, so further observation is required.

[0049] Since cracks and gaps do not exist at a single point, it is precisely because of the above characteristics that when the simulated length is greater than the actual length, the position of the receiving end needs to be slightly changed in order to specifically determine the shape of the problem and the accident.

[0050] In some embodiments of the intelligent detection method for the health of a transmission line tower provided in the present application, the position of the receiving end is changed, the distribution and shape of cracks and gaps within a certain range are determined, and finally the problems that have occurred are inferred and the warning is issued, including: The position of the receiving end is adjusted within a certain range, and the spatial position of the receiving end is recorded when the simulated length is greater than the actual length again.

[0051] First, if the simulated length is greater than the actual length, it proves that there is a gap in the actual tower under the line. If this gap only passes through a single component, it can be judged that there is a problem inside the component. If the line passes through two components, it proves that there is a gap between the passed components or the two components, and further determination is required. For this reason, when the simulated length is greater than the actual length, it is necessary to start recording the spatial position of the receiving end. When the spatial position is determined, the receiving end is changed within a certain range. When the simulated length is greater than the actual length again, the difference between the two values ​​and the current position of the receiving end are determined and recorded.

[0052] In some embodiments of the intelligent detection method for the health of transmission line towers provided in the present application, the distribution and shape of cracks and gaps within a certain range are determined, and finally the problems that have occurred are inferred and the warning is issued, including: The recorded position of the receiving end and the difference between the simulated length and the actual length are visualized in the spatial coordinate system according to the spatial position relationship between the transmitting end and the receiving end at that time; the cause of the problem is inferred based on the shape and distribution of the difference.

[0053] Finally, all the points in the area where the simulated length is greater than the actual length are counted and marked in the spatial coordinate system, so as to obtain the approximate shape of the problem and the fault. By analyzing the shape, the type of possible problem can be determined to a certain extent, because cracks and gaps present different distributions. In order to improve the accuracy of identification, multi-angle detection can be used, that is, changing the position of the transmitter, and performing multi-angle detection on the problem area, so as to more accurately determine the cause of the problem.

[0054] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for intelligently detecting the health of a transmission line tower, characterized in that: include: A transmitting end is installed on one side of the tower, and the transmitting end can emit a detection signal whose intensity will be attenuated to different degrees when passing through components of different thicknesses; The tower is photographed and scanned by a receiving end, a model of the tower is generated according to the determined information, and the positions of the transmitting end and the receiving end are fed back to the model in real time; According to the strength of the detection signal received by the receiving end, the thickness of the component passed by the detection signal is determined and set as the actual length, and the thickness of the model passed by the line connecting the transmitting end and the receiving end at the current time point is picked up in the model and set as the simulated length; if the simulated length is greater than the actual length, it indicates that cracks appear inside the component or there is a gap at the connection between two components; the position of the receiving end is changed to determine the distribution and shape of cracks and gaps within a certain range, and finally the problems that have occurred are inferred and an early warning is issued.

2. The intelligent health detection method for power transmission line towers according to claim 1, characterized in that: The step of installing a transmitting end on one side of a pole tower comprises: The transmitting end sends the detection signal of the same strength to the outside, and the strength of the detection signal will not be attenuated when the detection signal does not pass through any component.

3. The intelligent health detection method for power transmission line towers according to claim 2, characterized in that: Before photographing and scanning the tower through the receiving end, the method further includes: The receiving end is stably in the air and receives the detection signal, and calculates the current spatial position and angle of the receiving end in real time; The receiving end photographs the tower at different angles, integrates the photographed multiple pictures and generates the model.

4. The intelligent health detection method for power transmission line towers according to claim 3, characterized in that: Generating the tower model according to the determined information includes: Communication is established between the transmitting end and the receiving end, and in the process of changing the spatial position of the receiving end, the size of the model is checked according to the shielding of the communication by the tower.

5. The intelligent health detection method for power transmission line towers according to claim 2, characterized in that: Feeding back the positions of the transmitting end and the receiving end to the model in real time includes: The model is marked in a spatial coordinate system, and the positions of the transmitting end and the receiving end relative to the pole tower are fed back in real time on the spatial coordinate system.

6. The method for intelligent health detection of power transmission line towers according to claim 5, characterized in that: The step of determining the thickness of the component through which the detection signal passes according to the strength of the detection signal received by the receiving end and setting the thickness as the actual length includes: Identify and record the current position of the receiving end, infer the attenuation degree of the detection signal received by the receiving end based on its strength, analyze the thickness of the component passed by the detection signal at the current angle through the attenuation degree and use this thickness as the actual length.

7. The intelligent health detection method for power transmission line towers according to claim 5, characterized in that: The step of picking up the thickness of the model passed by the line connecting the transmitting end and the receiving end at the current time point in the model and setting it as the simulation length comprises: After the actual length is determined, a line is drawn between the position marking points of the current transmitting end and the receiving end in the spatial coordinate system, and the length of the model through which the line passes is determined and used as the simulated length.

8. The method for intelligent health detection of power transmission line towers according to claim 2, characterized in that: If the simulated length is greater than the actual length, it indicates that a crack occurs inside the component or a gap exists at the connection between two components. If the simulated length is greater than the actual length, it is inferred that there may be cracks inside the component, or a gap appears at the connection between the two components; the above problems may lead to plastic deformation and damage of the component and failure of the connection between the two components.

9. The intelligent health detection method for power transmission line towers according to claim 5, characterized in that: The changing of the position of the receiving end, determining the distribution and shape of cracks and gaps within a certain range, and finally inferring the problems and issuing early warnings include: The position of the receiving end is adjusted within a certain range, and the spatial position of the receiving end is recorded when the simulated length is greater than the actual length again.

10. The intelligent health detection method for power transmission line towers according to claim 9, characterized in that: The determination of the distribution and shape of cracks and gaps within a certain range, and ultimately inferring the problems that have occurred and issuing early warnings include: The recorded position of the receiving end and the difference between the simulated length and the actual length are visualized in the spatial coordinate system according to the spatial position relationship between the transmitting end and the receiving end at that time; the cause of the problem is inferred based on the shape and distribution of the difference.

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