Power transmission line sag detection early warning method

Abstract

The invention discloses a power transmission line sag detection and early warning method, and belongs to the technical field of power transmission line sag detection and early warning, the detection method is implemented by a power transmission line sag detection system through a thunder ranging system composed of two two-dimensional radars and an early warning system in cooperation with a camera, and the detection method comprises the following steps: 1, determining the field angle (Field of View, File View, File View, File View, File View, File View, File View, File View, File View) of the camera; the field angle is a range angle which can be observed by the camera in the horizontal direction or the vertical direction, and can be determined by physical parameters (such as focal length and sensor size) of the camera. According to the invention, vertical calibration installation is carried out on the thundersight detection assembly, the thundersight detection assembly is further locked and fixed through the arrangement of the locking assembly, the actual sag height of the power transmission line is calculated through the thundersight detection assembly, and early warning is carried out on a target object entering a warning range through the early warning system. Therefore, the purposes of convenient calibration and installation and accurate sag detection of the power transmission line can be achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of transmission line sag detection and early warning, and particularly relates to a transmission line sag detection and early warning method. Background Art

[0002] Due to the influence of factors such as gravity, temperature, wind force, and electromagnetic force, the conductor will naturally sag between the support points in a transmission line, that is, "sag". The change of sag will affect the safety distance of the line. If not monitored and controlled in time, it may cause the conductor to come into contact with ground objects, vegetation, etc., and then lead to risks such as short circuits and fires. Therefore, the accurate detection and monitoring of the sag of transmission lines are crucial.

[0003] However, when detecting the sag degree of transmission lines, non-contact methods such as lasers, images, and 3D radars have high equipment costs and are difficult to meet the economic applicability of large-scale transmission lines. And the sensor method based on the Internet of Things requires frequent maintenance and has poor stability. For this reason, a transmission line sag detection and early warning method is needed. Through the layout of dual two-dimensional radars, the indirect measurement of three-dimensional space data is realized, and the sag monitoring of transmission lines is achieved with a lower cost and easier maintenance solution. At the same time, combined with the inclination detection results, it can be installed more quickly and accurately. Summary of the Invention

[0004] The purpose of the present invention is to provide a transmission line sag detection and early warning method, which realizes the indirect measurement of three-dimensional space data through the layout of dual two-dimensional radars, and realizes the sag monitoring of transmission lines with a lower cost and easier maintenance solution. At the same time, combined with the inclination detection results, it can be installed more quickly and accurately to solve the above technical problems.

[0005] The technical solution of the present invention to solve the above technical problems is as follows: A transmission line sag detection and early warning method, characterized in that the detection method is a radar-vision ranging system composed of two two-dimensional radars and an early warning system in cooperation with a camera, which is used for the implementation of the transmission line sag detection system. The steps of the detection method are as follows:

[0006] I. Calculation of the camera's field of view (Field of View, FOV):

[0007] The field of view is the range angle that the camera can observe in the horizontal or vertical direction, and can be determined by the physical parameters of the camera (such as focal length and sensor size). It is defined as follows:

[0008] ·

[0009] ·sensor dimension: The size (horizontal or vertical) of the camera sensor.

[0010] ·Focal length: the focal length of the camera.

[0011] After determining the field of view angle, at the installation height of the camera, the spatial coverage range of the camera in the horizontal or vertical direction can be calculated, which provides a basis for subsequently converting the pixel position in the image into the actual physical space position.

[0012] II. Conversion between Image Pixels and Actual Angles

[0013] Assume that the camera is fixedly installed at a position where it can capture the suspension position of the transmission line. Each pixel point in the image has a certain angular offset relative to the camera center. The actual angle of the target point can be calculated by the following formula:

[0014] ·

[0015] · θ: The offset angle of the target point relative to the camera center.

[0016] · P: The pixel position of the transmission line in the image.

[0017] · Pcenter: The pixel position at the center of the image.

[0018] · Pmax: The maximum pixel value in the image resolution.

[0019] This formula can help calculate the actual angle corresponding to the transmission line in the image.

[0020] III. Calculation of the Actual Sag Height of the Transmission Line

[0021] Assume that the installation height of the camera is Hcam, and the field of view angle and installation angle are known. After calculating the angle θ of the transmission line in the image through the above formula, the horizontal distance D and the actual height Hsag of the suspension position of the transmission line can be further calculated.

[0022] . Horizontal distance D from the transmission line to the camera

[0023] Through the installation height of the camera and the calculated angle θ, the horizontal distance D of the transmission line can be obtained:

[0024] · D = H cam · tan(θ)

[0025] · D: The horizontal projection distance from the suspension point of the transmission line to the camera.

[0026] . Actual sag height Hsag of the transmission line

[0027] Use the installation height of the camera minus the height difference of the horizontal distance projection to calculate the actual sag height Hsag of the transmission line:

[0028] · Hsag = H cam -D·sin(θ)

[0029] ·Hsag: The actual sag height of the transmission line at the shooting position.

[0030] The lightning and vision ranging system for detecting the sag of transmission lines includes an installation angle iron installed on the tower frame of the electric tower. A support crossbar is fixedly installed on the right side of the installation angle iron. An installation crossbar is arranged on the right side of the support crossbar. A lightning and vision detection component is arranged on the surface of the installation crossbar. The lightning and vision detection component includes an installation frame fixedly connected to the surface of the installation crossbar. An intelligent cloud platform is fixedly installed on the top of the installation frame. A camera is arranged on the left side of the top of the intelligent cloud platform. An LED fill light is arranged on the right side of the top of the intelligent cloud platform. The rotating disk of the intelligent cloud platform is fixedly connected to the camera and the LED fill light. A suspension column is fixedly installed at the bottom of the installation frame. A bracket is fixedly installed at the bottom of the surface of the suspension column. Detection radars are fixedly installed on the front side and the rear side of the bracket. A calibration component is arranged on the right side of the surface of the support crossbar. A locking component is arranged on the right side of the support crossbar.

[0031] Preferably, the calibration component includes a hexagonal rotating cylinder rotatably connected to the inner cavity of the support crossbar. A hexagonal column is inserted into the inner cavity of the hexagonal rotating cylinder. Flanges are welded to the opposite ends of the hexagonal column and the installation crossbar. A plurality of bolts I are annularly distributed on the surfaces of the two flanges. The two flanges are fixedly connected by the bolts I.

[0032] Preferably, a protective shell is fixedly installed at the bottom of the support crossbar. A stepping motor is fixedly installed in the inner cavity of the protective shell. The output shaft of the stepping motor is fixedly connected to a driving gear. A stress gear is fixedly connected to the surface of the hexagonal rotating cylinder. The driving gear and the stress gear are meshed with each other.

[0033] Preferably, a mounting seat is fixedly connected to the left side of the suspension column. An inclination sensor is fixedly installed on the left side of the mounting seat. The inclination sensor is electrically connected to the stepping motor through a motor controller and a wire.

[0034] Preferably, the locking component includes a limit sliding sleeve sleeved on the surface of the support crossbar. Knurled chucks are fixedly connected to the right side of the limit sliding sleeve and the right side of the surface of the hexagonal rotating cylinder. A threaded rotating sleeve is rotatably connected to the surface of the support crossbar. The threaded rotating sleeve is simultaneously threadedly connected to the surface of the limit sliding sleeve.

[0035] Preferably, limit sliders are fixedly connected to the top and the bottom of the inner cavity of the limit sliding sleeve. Limit sliding grooves adapted to the limit sliders are opened on the right sides of the top and the bottom of the support crossbar.

[0036] Preferably, two reinforcing rods are fixedly connected to the surface of the support cross bar, and a threaded pull rod is threadedly connected to one end of the reinforcing rod away from the support cross bar.

[0037] Preferably, the steps of the warning system include inputting target position data, boundary detection, and triggering an alarm. Inputting target position data: Obtain the target position (x, y, z) from the detection radar.

[0038] Preferably, the purpose of the boundary detection is to compare whether the target position exceeds the range of the warning cube.

[0039] Preferably, triggering the alarm: If the detected target object exceeds the boundary, immediately send an alarm signal, record the time and target information, and the alarm is issued by a loudspeaker.

[0040] The beneficial effects of the present invention are as follows: Through the setting of the calibration component, the thunder and vision detection component is vertically calibrated and installed. Subsequently, through the setting of the locking component, the thunder and vision detection component is further locked and fixed. Subsequently, the actual sag height of the transmission line is calculated by the thunder and vision detection component, and the target object entering the warning range is warned through the warning system, so as to achieve the purpose of facilitating calibration installation and accurate detection of the sag of the transmission line. Description of the Drawings

[0041] Through the following detailed description in conjunction with the accompanying drawings, the above and / or other aspects of the present invention will become clearer and easier to understand. These drawings are only schematic and do not limit the present invention, where:

[0042] Figure 1 It is a working schematic diagram of a thunder and vision ranging system according to an embodiment of the present invention;

[0043] Figure 2 It is a three-dimensional schematic diagram of a thunder and vision ranging system according to an embodiment of the present invention;

[0044] Figure 3 It is a three-dimensional schematic diagram of a thunder and vision detection component according to an embodiment of the present invention;

[0045] Figure 4 It is a three-dimensional exploded view of a thunder and vision detection component and a calibration component according to an embodiment of the present invention;

[0046] Figure 5 It is a three-dimensional exploded view of a support cross bar, a mounting cross bar, a locking component, and a calibration component according to an embodiment of the present invention;

[0047] Figure 6 It is a three-dimensional exploded view of a support cross bar, a locking component, and a calibration component according to an embodiment of the present invention;

[0048] Figure 7Schematic diagram of the connection between an early warning system and a radar-vision ranging system according to an embodiment of the present invention.

[0049] In the drawings, the components represented by the reference numerals are as follows:

[0050] 1. Mounting angle iron, 2. Support cross bar, 3. Mounting cross bar, 4. Radar-vision detection component, 41. Mounting frame, 42. Intelligent pan-tilt, 43. Camera, 44. LED fill light, 45. Suspension post, 46. Bracket, 47. Detection radar, 5. Locking component, 51. Limit sliding sleeve, 52. Knurled chuck, 53. Threaded rotating sleeve, 54. Limit slider, 55. Limit chute, 56. Clamp, 57. Screw, 6. Calibration component, 61. Hexagonal rotating cylinder, 62. Hexagonal column, 63. Flange, 64. Stepper motor, 65. Driving gear, 66. Load-bearing gear, 67. Mounting seat, 68. Inclination sensor, 69. Protective shell, 7. Reinforcing rod, 8. Threaded tie rod. Specific embodiments

[0051] In the following, embodiments of the method for detecting and early warning the sag of a transmission line according to the present invention will be described with reference to the drawings.

[0052] The embodiments described herein are specific specific embodiments of the present invention for explaining the concept of the present invention, and are all explanatory and exemplary, and should not be construed as limiting the embodiments of the present invention and the scope of the present invention. Except for the embodiments described herein, those skilled in the art can also adopt other obvious technical solutions based on the content disclosed in the claims and the specification of the present application, and these technical solutions include technical solutions that make any obvious substitutions and modifications to the embodiments described herein.

[0053] The drawings in this specification are schematic diagrams to assist in explaining the concept of the present invention, schematically showing the shapes of various parts and their mutual relationships. Please note that in order to clearly show the structures of the components in the embodiments of the present invention, the drawings are not drawn according to the same scale. The same reference numerals are used to represent the same parts.

[0054] Embodiment 1: Figure 1-7 A method for detecting and early warning the sag of a transmission line according to an embodiment of the present invention is shown. The detection method is implemented by a radar-vision ranging system composed of two two-dimensional radars and an early warning system in cooperation with a camera, and the steps of the detection method are as follows:

[0055] I. Calculation of the Field of View (FOV) of the camera:

[0056] The field of view is the range angle that the camera can observe in the horizontal or vertical direction, and can be determined by the physical parameters of the camera such as the focal length and the sensor size. The definition is as follows:

[0057] ·

[0058] ·sensor dimension: The size of the camera sensor, either horizontal or vertical.

[0059] ·focal length: The focal length of the camera.

[0060] After determining the field of view angle, at the installation height of the camera, the spatial coverage range of the camera in the horizontal or vertical direction can be calculated, which provides a basis for converting the pixel position in the image to the actual physical space position in the subsequent process.

[0061] II. Conversion between Image Pixels and Actual Angles

[0062] Assume that the camera is fixedly installed at a position where it can capture the suspension position of the transmission line. Each pixel point in the image has a certain angular offset relative to the camera center. The actual angle of the target point can be calculated by the following formula:

[0063] ·

[0064] ·θ: The offset angle of the target point relative to the camera center.

[0065] ·P: The pixel position of the transmission line in the image.

[0066] ·Pcenter: The pixel position at the center of the image.

[0067] ·Pmax: The maximum pixel value in the image resolution.

[0068] This formula can help calculate the actual angle corresponding to the transmission line in the image.

[0069] III. Calculation of the Actual Sag Height of the Transmission Line

[0070] Assume that the installation height of the camera is Hcam, and the field of view angle and installation angle are known. After calculating the angle θ of the transmission line in the image through the above formula, the horizontal distance D and the actual height Hsag of the suspension position of the transmission line can be further calculated.

[0071] 3.1 Horizontal Distance D from the Transmission Line to the Camera

[0072] Through the installation height of the camera and the calculated angle θ, the horizontal distance D of the transmission line can be obtained:

[0073] ·D = H cam ·tan(θ)

[0074] ·D: The horizontal projection distance from the suspension point of the transmission line to the camera.

[0075] 3.2 Actual Sag Height Hsag of Transmission Line

[0076] Calculate the actual sag height Hsag of the transmission line by subtracting the height difference of the horizontal distance projection from the camera installation height:

[0077] ·H sag = H cam - D·sin(θ)

[0078] ·Hsag: The actual suspension height of the transmission line at the shooting position.

[0079] The lightning and vision ranging system for detecting the sag of transmission lines includes an installation angle iron 1 installed on the tower frame of the electric tower. A support crossbar 2 is fixedly installed on the right side of the installation angle iron 1. Two reinforcing bars 7 are fixedly connected to the surface of the support crossbar 2. One end of the reinforcing bar 7 far from the support crossbar 2 is threadedly connected with a threaded tie rod 8. By the combined use of the reinforcing bar 7 and the threaded tie rod 8, the support crossbar 2 can be obliquely braced and fixed to the tower frame of the electric tower, which plays a role of supporting and limiting the support crossbar 2, thereby further increasing the connection position and relationship between the support crossbar 2 and the tower frame and enhancing the stability of the support crossbar 2 after installation. An installation crossbar 3 is arranged on the right side of the support crossbar 2. A lightning and vision detection component 4 is arranged on the surface of the installation crossbar 3. The lightning and vision detection component 4 includes an installation frame 41 fixedly connected to the surface of the installation crossbar 3. An intelligent pan-tilt 42 is fixedly installed on the top of the installation frame 41. A camera 43 is arranged on the left side of the top of the intelligent pan-tilt 42. An LED fill light 44 is arranged on the right side of the top of the intelligent pan-tilt 42. The rotating disk of the intelligent pan-tilt 42 is fixedly connected to the camera 43 and the LED fill light 44. A suspension post 45 is fixedly installed at the bottom of the installation frame 41. A bracket 46 is fixedly installed at the bottom surface of the suspension post 45. Detection radars 47 are fixedly installed on the front side and the rear side of the bracket 46. A calibration component 6 is arranged on the right side of the surface of the support crossbar 2. A locking component 5 is arranged on the right side of the support crossbar 2. The early warning system steps include inputting target position data, boundary detection, and triggering an alarm. Inputting target position data: Obtain the target position x, y, z from the detection radar 47. The purpose of boundary detection is to compare whether the target position exceeds the range of the warning cube. Triggering an alarm: If the detected target object exceeds the boundary, immediately send an alarm signal, record the time and target information, and the alarm is issued by a loudspeaker.

[0080] Embodiment 2: It is basically the same as Embodiment 1, and furthermore: The calibration assembly 6 includes a hexagonal cylinder 61 rotatably connected to the inner cavity of the support cross bar 2. A hexagonal column 62 is inserted into the inner cavity of the hexagonal cylinder 61. Flanges 63 are welded to the opposite ends of the hexagonal column 62 and the mounting cross bar 3. A plurality of first bolts are annularly distributed on the surfaces of the two flanges 63. The two flanges 63 are fixedly connected by the first bolts. A protective shell 69 is fixedly installed at the bottom of the support cross bar 2. A stepping motor 64 is fixedly installed in the inner cavity of the protective shell 69. The output shaft of the stepping motor 64 is fixedly connected to a driving gear 65. A stress gear 66 is fixedly connected to the surface of the hexagonal cylinder 61. The driving gear 65 and the stress gear 66 are meshed with each other. A mounting seat 67 is fixedly connected to the left side of the hanging column 45. An inclination sensor 68 is fixedly installed on the left side of the mounting seat 67. The inclination sensor 68 and the stepping motor 64 are electrically connected through a motor controller and wires. Through the setting of the calibration assembly 6, with the cooperation of the mounting seat 67 and the inclination sensor 68, the perpendicularity of the hanging column 45 and the bracket 46 is detected. At the same time, through the cooperation of the motor controller and the wires, the stepping motor 64 is driven, so that the stepping motor 64 drives the driving gear 65 to rotate. And with the cooperation of the driving gear 65 and the stress gear 66, the driving rotation of the hexagonal cylinder 61 and the hexagonal column 62 in its inner cavity is realized. Furthermore, the vertical angles of the hanging column 45, the detection radar 47, the intelligent cloud platform 42 and the camera 43 are adjusted, so that the above components are vertically installed, ensuring the stability after installation. At the same time, the automatic calibration method for the perpendicularity eliminates the need for manual comparison during installation, improves the installation efficiency, and improves the accuracy of the installation position and installation angle.

[0081] Embodiment 3: It is basically the same as Embodiment 1, and furthermore: The locking assembly 5 includes a limiting sliding sleeve 51 sleeved on the surface of the support cross bar 2. On the right side of the limiting sliding sleeve 51 and the right side of the surface of the hexagonal rotating cylinder 61, knurled chucks 52 are fixedly connected. A threaded rotating sleeve 53 is rotatably connected to the surface of the support cross bar 2. The threaded rotating sleeve 53 is simultaneously threadedly connected to the surface of the limiting sliding sleeve 51. At the top and bottom of the inner cavity of the limiting sliding sleeve 51, limiting sliders 54 are fixedly connected. On the right side of the top and bottom of the support cross bar 2, limiting sliding grooves 55 adapted to the limiting sliders 54 are provided. Through the setting of the locking assembly 5, during the rotation of the threaded rotating sleeve 53, the limiting sliding sleeve 51 can be pushed through the internal thread of its inner wall, so that the limiting sliding sleeve 51 drives the knurled chuck 52 on its right side to move horizontally on the surface of the support cross bar 2, and then the two knurled chucks 52 can be engaged, so that the support cross bar 2 and the hexagonal rotating cylinder 61 are in a meshing and locking state, which is convenient for the user to lock and position after vertically calibrating the detection radar 47 and the camera 43, preventing them from moving during use. At the same time, with the combined use of the limiting sliders 54 and the limiting sliding grooves 55, the limiting and guiding effects on the limiting sliding sleeve 51 are achieved, so that the limiting sliding sleeve 51 can only slide horizontally on the surface of the support cross bar 2, avoiding the phenomenon that the hexagonal rotating cylinder 61 rotates by itself after being limited. After the two knurled chucks 52 are engaged and locked, the user finally clamps the clamp 56 on the surfaces of the two knurled chucks 52 to further limit and lock them, improving the stability of the installation cross bar 3 and its surface structure after installation.

[0082] In summary: For this method for detecting and warning the sag of a transmission line, through the setting of the calibration assembly 6, the thunder and vision detection assembly 4 is vertically calibrated and installed. Subsequently, through the setting of the locking assembly 5, the thunder and vision detection assembly 4 is further locked and fixed. Subsequently, the actual sag height of the transmission line is calculated by the thunder and vision detection assembly 4, and the warning system warns the target objects entering the warning range, so as to achieve the purpose of facilitating calibration installation and accurate detection of the sag of the transmission line.

[0083] The disclosed technical features are not limited to the combinations with other disclosed features. Those skilled in the art can also make other combinations among the technical features according to the purpose of the invention, subject to achieving the purpose of the present invention.

Claims

1. A transmission line sag detection and early warning method, characterized in that: The detection method is a radar ranging system composed of two two-dimensional radars and an early warning system with a camera, which is used for the implementation of the transmission line sag detection system. The detection method steps are as follows:

1. Calculation of camera field of view (FOV): The field of view is the angle of the camera's ability to observe in the horizontal or vertical direction. It can be determined by the camera's physical parameters (such as focal length and sensor size); it is defined as follows: ● ●Sensor dimension: The size of the camera sensor (horizontal or vertical); ●focal length: the focal length of the camera; After determining the field of view angle, the spatial coverage of the camera in the horizontal or vertical direction can be calculated at the installation height of the camera, which provides the basis for the subsequent conversion of the pixel position in the image into the actual physical space position; 2. Conversion between image pixels and actual angles Assuming that the camera is fixedly installed in a suspended position where it can capture the power line, each pixel in the image has a certain angle offset relative to the center of the camera; the actual angle of the target point can be calculated by the following formula: ● ●θ: The offset angle of the target point relative to the camera center ●P: The pixel position of the power line in the image ●Pcenter: image center pixel position ●Pmax: Maximum pixel value in image resolution This formula can help calculate the actual angle that the transmission line corresponds to in the image; 3. Calculation of actual sag height of transmission line Assuming that the installation height of the camera is Hcam, the field of view angle and the installation angle are known, after calculating the angle θ of the transmission line in the image by the above formula, the horizontal distance D and the actual height Hsag of the suspension position of the transmission line can be further calculated; 3.1 Horizontal distance D from power line to camera The horizontal distance D of the transmission line can be obtained by the camera installation height and the calculated angle θ: ·D=H cam ·time(θ) ●D: The horizontal projection distance from the transmission line hanging point to the camera; 3.2 Actual sag height Hsag of transmission line Use the camera installation height minus the height difference of the horizontal distance projection to calculate the actual sag height Hsag of the transmission line: ·H sag =H cam -D sin(θ) Hsag: the actual hanging height of the transmission line at the shooting location; The radar vision ranging system for detecting sag of a power transmission line comprises a mounting angle iron (1) mounted on a tower frame of an electric tower, a supporting cross bar (2) being fixedly mounted on the right side of the mounting angle iron (1), a mounting cross bar (3) being arranged on the right side of the supporting cross bar (2), a radar vision detection component (4) being arranged on the surface of the mounting cross bar (3), the radar vision detection component (4) comprising a mounting frame (41) fixedly connected to the surface of the mounting cross bar (3), an intelligent pan-tilt platform (42) being fixedly mounted on the top of the mounting frame (41), and a camera (4) being arranged on the left side of the top of the intelligent pan-tilt platform (42). 3), an LED fill light (44) is arranged on the right side of the top of the intelligent pan-tilt platform (42), the rotating disk of the intelligent pan-tilt platform (42) is fixedly connected to the camera (43) and the LED fill light (44), a hanging column (45) is fixedly installed at the bottom of the mounting frame (41), a bracket (46) is fixedly installed at the bottom of the surface of the hanging column (45), and a detection radar (47) is fixedly installed on the front and rear sides of the bracket (46), a calibration component (6) is arranged on the right side of the surface of the supporting cross bar (2), and a locking component (5) is arranged on the right side of the supporting cross bar (2).

2. A transmission line sag detection and early warning method according to claim 1, characterized in that: The calibration assembly (6) comprises a hexagonal rotating cylinder (61) rotatably connected to the inner cavity of the supporting cross bar (2), a hexagonal column (62) is inserted into the inner cavity of the hexagonal rotating cylinder (61), and flanges (63) are welded to the opposite ends of the hexagonal column (62) and the mounting cross bar (3), and a plurality of bolts are distributed in an annular pattern on the surfaces of the two flanges (63), and the two flanges (63) are fixedly connected by bolts.

3. A transmission line sag detection and early warning method according to claim 2, characterized in that: A protective shell (69) is fixedly installed at the bottom of the supporting crossbar (2), a stepper motor (64) is fixedly installed in the inner cavity of the protective shell (69), an output shaft of the stepper motor (64) is fixedly connected to a driving gear (65), a surface of the hexagonal rotating cylinder (61) is fixedly connected to a force-bearing gear (66), and the driving gear (65) and the force-bearing gear (66) are meshed.

4. A transmission line sag detection and early warning method according to claim 3, characterized in that: The left side of the suspension column (45) is fixedly connected with a mounting seat (67), and the left side of the mounting seat (67) is fixedly installed with an inclination sensor (68). The inclination sensor (68) is electrically connected to the stepping motor (64) through a motor controller and a wire.

5. A transmission line sag detection and early warning method according to claim 4, characterized in that: The locking assembly (5) comprises a limiting sleeve (51) sleeved on the surface of the supporting cross bar (2); a knurled chuck (52) is fixedly connected to the right side of the limiting sleeve (51) and the right side of the surface of the hexagonal rotating cylinder (61); a threaded rotating sleeve (53) is rotatably connected to the surface of the supporting cross bar (2); and the threaded rotating sleeve (53) is simultaneously threadedly connected to the surface of the limiting sleeve (51).

6. A transmission line sag detection and early warning method according to claim 5, characterized in that: The top and bottom of the inner cavity of the limiting sliding sleeve (51) are fixedly connected to the limiting sliding block (54), and the right sides of the top and bottom of the supporting cross bar (2) are provided with limiting sliding grooves (55) adapted to the limiting sliding block (54).

7. A transmission line sag detection and early warning method according to claim 6, characterized in that: Two reinforcing rods (7) are fixedly connected to the surface of the supporting cross bar (2), and one end of the reinforcing rod (7) away from the supporting cross bar (2) is threadedly connected to a threaded pull rod (8).

8. A transmission line sag detection and early warning method according to claim 7, characterized in that. The early warning system steps include inputting target position data, boundary detection and triggering alarm, inputting target position data: by obtaining the target position (x, y, z) from the detection radar (47).

9. A transmission line sag detection and early warning method according to claim 8, characterized in that: The purpose of the boundary detection is to compare whether the target position exceeds the range of the warning cube.

10. A transmission line sag detection and early warning method according to claim 9, characterized in that: The trigger alarm: if the detected target object exceeds the boundary, an alarm signal is immediately sent, the time and target information are recorded, and the alarm is issued by a loudspeaker.

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