Guyed tower top displacement acquisition method and system

Abstract

The invention provides a guyed tower top displacement acquisition method and system, and belongs to the field of power transmission tower maintenance, and the method comprises the following steps: determining a reference horizontal plane of a guyed tower in a certain inclined state; the inclination angle of the guyed tower at any moment in the operation process and the actual vertical height corresponding to the moment are obtained in combination with the reference horizontal plane; and obtaining the theoretical height of the guyed tower, and calculating the displacement of the tower top of the guyed tower according to the theoretical height, the actual vertical height and the inclination angle. According to the displacement acquisition method, the tower top displacement at the moment can be calculated only by measuring the inclination angle and the actual vertical height of the tower body, the whole process can be completed only through simple operation at the tower bottom, workers do not need to climb the tower, signal acquisition equipment does not need to be installed on the tower top for many times, tower top displacement data can be acquired without climbing the tower, and the working efficiency is improved. Potential safety hazards are reduced, and the measurement process is simple and efficient.

Description

Technical Field

[0001] The invention belongs to the field of transmission tower maintenance, and in particular relates to a method and system for obtaining the top displacement of a guy tower. Background Art

[0002] The displacement of the tower top is an inevitable problem that will occur during the operation of the guyed transmission tower. Whether the displacement of the tower top is within a reasonable range will greatly affect the safety of the guyed tower. Therefore, the displacement of the tower top is the data that needs to be focused on in the maintenance of the guyed tower. In actual maintenance projects, the detection method of the tower top displacement is the key. At present, the displacement acquisition methods for the tower top displacement mainly include the tower measurement method and the acceleration method. The tower measurement method is to manually climb the tower and manually measure the real-time height and lateral displacement of the tower body to obtain the displacement of the tower top; the acceleration method is to use the accelerometer to integrate the acceleration signal of the tower top to obtain the displacement signal, thereby calculating the displacement of the tower top.

[0003] Although the above two methods can measure the displacement of the tower top, there are some problems. For example, the tower measurement method requires manual tower measurement. However, since the guyed tower is used in high-voltage power transmission lines or communication lines, the guyed tower cannot be disconnected from the power transmission when the staff goes up the tower for measurement. Therefore, in order to ensure the safety of the staff, when using this method for measurement, the staff needs to prepare professional tower equipment and complex operations to perform relevant measurements normally and safely, which makes the measurement process complicated. When using the acceleration method for measurement, it is necessary to install an accelerometer on the top of the guyed tower, and use the accelerometer to obtain acceleration signal data within a certain period of time, and then calculate the displacement during this period of time. However, since the guyed tower is in the initial state, there is no accelerometer on its top. Therefore, every time a displacement measurement is required, the accelerometer needs to be installed on the top of the tower for a period of time. This process is very cumbersome.

[0004] In summary, for the maintenance of the guyed towers that have not been replaced, the existing method for obtaining the displacement of the top of the guyed tower has safety hazards and the measurement is very complicated. Summary of the invention

[0005] In order to overcome the disadvantage that the process of obtaining the top displacement of the cable tower in the prior art is very complicated, the present invention provides a method for obtaining the top displacement of the cable tower, comprising the following steps:

[0006] Determine the reference horizontal plane when the guyed tower is in a certain tilt state;

[0007] In combination with the reference horizontal plane, the tilt angle of the guying tower at any time during operation and the actual vertical height corresponding to any time are obtained;

[0008] The theoretical height of the guyed tower is obtained, and the displacement of the top of the guyed tower is calculated according to the theoretical height, the actual vertical height and the inclination angle.

[0009] Preferably, the method for determining the reference horizontal plane is:

[0010] Determine the positioning point, specifically: when the guyed tower is in a certain tilted state, measure upward from the bottom of the tower at least two symmetrical points with the same distance from the bottom of the tower, and the symmetrical points are the positioning points;

[0011] The reference plane position is determined by drawing horizontal lines along the tower body with the symmetrical points as reference points, aligning the prepared steel plates with matching sizes with the two horizontal lines and welding them to obtain the reference horizontal plane.

[0012] Preferably, the method for determining the reference horizontal plane is: finding a theoretical horizontal plane at a certain height of the guyed tower from the ground, that is, a plane parallel to the ground when the guyed tower is not tilted.

[0013] Preferably, the reference horizontal plane is fixedly arranged at a position where the cable tower is 1.5-2 meters above the ground.

[0014] Preferably, an inclinometer is used to measure the tilt angle of the cable tower at any time during operation.

[0015] Preferably, a laser rangefinder is used to measure the actual vertical height of the guyed tower at any time during operation.

[0016] Preferably, the displacement of the top of the guy tower is calculated according to the theoretical height, the actual vertical height and the inclination angle, specifically by the following formula:

[0017] Δ y =h0-h

[0018] Δ x =h0·sinθ

[0019] Δ y is the vertical displacement of the measuring point A at the top of the guyed tower, Δ x is the horizontal displacement of the measuring point A on the top of the cable tower, h is the actual vertical height of the cable tower at any time during operation, h0 is the theoretical height, and θ is the inclination angle of the cable tower.

[0020] The present invention also provides a system for obtaining displacement of a guyed tower top, comprising:

[0021] A reference horizontal plane acquisition module is used to determine the reference horizontal plane of the guyed tower when it is in a certain tilted state;

[0022] A parameter acquisition module, used to obtain the inclination angle of the guying tower at any time during operation and the actual vertical height corresponding to any time in combination with the reference horizontal plane;

[0023] The displacement calculation module is used to obtain the theoretical height of the guyed tower and calculate the displacement of the top of the guyed tower according to the theoretical height, the actual vertical height and the inclination angle.

[0024] The method and system for obtaining the top displacement of the cable tower provided by the present invention have the following beneficial effects:

[0025] 1. The displacement acquisition method of the present invention only needs to measure the inclination angle and actual vertical height of the tower body to calculate the displacement of the tower top at that moment. The whole process can be completed with simple operations at the bottom of the tower, without the need for workers to climb the tower. The tower top displacement data can be obtained without climbing the tower, thus reducing safety hazards and making the measurement process simple and efficient.

[0026] 2. The method of the present invention only needs to measure the inclination angle and actual vertical height of the tower body at a certain moment at any time according to actual needs to calculate the tower top displacement at that moment. There is no need to install signal acquisition equipment on the tower top multiple times, nor is there any need to obtain acceleration signal data within a certain period of time. The measurement process is simple and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiment of the present invention and its design scheme, the following briefly introduces the drawings required for this embodiment. 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 creative work.

[0028] Figure 1 A schematic diagram of a flow chart of a method for obtaining top displacement of a guyed tower according to an embodiment of the present invention;

[0029] Figure 2 The position diagram of the reference horizontal plane;

[0030] Figure 3 It is the top view of the reference horizontal plane;

[0031] Figure 4 A top view of the position diagram of the reference horizontal plane;

[0032] Figure 4 This is the position diagram after the guyed tower is displaced;

[0033] Figure 5 It is the displacement measurement point at the top of the guyed tower. DETAILED DESCRIPTION

[0034] In order to enable those skilled in the art to better understand the technical solution of the present invention and implement it, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the scope of protection of the present invention.

[0035] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the technical solutions of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0036] In addition, the terms "first", "second", etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise clearly specified or limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. In the description of the present invention, unless otherwise specified, "plurality" means two or more, which will not be described in detail here.

[0037] Example

[0038] The present invention provides a method for obtaining the top displacement of a guyed tower, specifically: Figure 1 As shown, the following steps are included:

[0039] Step 1: Determine the reference horizontal plane when the guyed tower is in a certain tilt state.

[0040] As attached Figure 1 As shown in the figure, find a theoretical horizontal plane about 2 meters above the ground of the guyed tower (about the same height as a person, easy to implement), that is, the plane that should be kept horizontal in the construction drawing is the reference horizontal plane. This plane is parallel to the ground when the guyed tower is not tilted, and the tilt angle in a certain tilted state is the same as the tilt angle of the tower body; if there is no reference horizontal plane, you can weld a reference horizontal plane by yourself, and the welding method is as follows: first, determine the positioning point, specifically: because the guyed tower is an axisymmetric figure, therefore, when the guyed tower is in a certain tilted state, measure at least two symmetrical points at the same distance from the bottom of the tower upward, and the symmetrical points are the positioning points; secondly, determine the position of the reference plane, specifically: use these two symmetrical points as reference points to draw horizontal lines along the tower body respectively, align the prepared steel plates with matching sizes with the two horizontal lines and weld them to obtain a reference horizontal plane, the tilt angle of the reference horizontal plane is the same as the tilt angle of the tower body, as shown in FIG. Figure 2 and Figure 3 shown.

[0041] Step 2: Combined with the reference horizontal plane, obtain the inclination angle of the cable tower at any time during operation and the actual vertical height corresponding to any time.

[0042] The inclinometer is fixed on the reference horizontal plane, and the inclinometer is used to measure the inclination angle between the reference horizontal plane and the ground. This inclination angle can reflect the angle θ at which the cable tower is tilted. The specific displacement acquisition method is: the inclinometer is fixed on the reference horizontal plane, ensuring that the inclinometer is tightly fitted with the reference horizontal plate, and the inclinometer is turned on for measurement (such as Figure 4 As shown), read the inclination data θ (i.e. the inclination angle).

[0043] Use a laser rangefinder to measure the actual vertical height h of the guyed tower when it is in a certain tilted state. Specifically, use a laser rangefinder at the bottom of the guyed tower to ensure that the laser is perpendicular to the horizontal plane (this can be ensured by making the laser rangefinder itself level), and align the laser with the measuring point (for easy confirmation, the middle point of the top of the guyed tower is generally selected, see Figure 5 The measured data at the measuring point A) is the actual vertical height h of the cable tower.

[0044] Step 3: Obtain the theoretical height of the guyed tower, and calculate the displacement of the top of the guyed tower based on the theoretical height, actual vertical height, and inclination angle.

[0045] The theoretical height of the guyed tower is obtained from the guyed tower drawing.

[0046] The displacement of the top of the guyed tower is calculated by the following formula:

[0047] Δ y =h0-h

[0048] Δ x =h0·sinθ

[0049] Among them, Δ y is the vertical displacement of the measuring point A at the top of the guyed tower, Δ x is the horizontal displacement of the measuring point A on the top of the cable tower, h is the actual vertical height of the cable tower at any time during operation, h0 is the theoretical height, and θ is the inclination angle of the cable tower.

[0050] The present invention also provides a system for obtaining the displacement of the top of a cable tower, including a reference horizontal plane obtaining module, a parameter obtaining module and a displacement calculation module. The reference horizontal plane obtaining module is used to determine the reference horizontal plane of the cable tower when it is in a certain tilted state; the parameter obtaining module is used to obtain the tilt angle of the cable tower at any time during operation and the actual vertical height corresponding to any time in combination with the reference horizontal plane; the displacement calculation module is used to obtain the theoretical height of the cable tower, and calculate the displacement of the top of the cable tower according to the theoretical height, the actual vertical height and the tilt angle.

[0051] The present invention overcomes the problem that the existing detection methods cannot perform real-time detection of the top displacement of a guyed transmission tower that is not equipped with real-time monitoring equipment, and the problem that the existing detection methods are too complicated and costly. By utilizing the inclination angle data of the guyed tower, as well as the force balance principle and geometric principle, a fast detection method for measuring the top displacement of the guyed tower is provided, thereby realizing real-time detection of the top displacement of the guyed transmission tower, and providing guarantee for the maintenance work of the guyed transmission tower.

[0052] The above embodiments are only preferred specific implementation methods of the present invention, and the protection scope of the present invention is not limited thereto. Any simple changes or equivalent replacements of the technical solutions that can be obviously obtained by any technician familiar with the field within the technical scope disclosed in the present invention belong to the protection scope of the present invention.

Claims

1. A method for obtaining the top displacement of a guyed tower, characterized in that: The steps include: Determine the reference horizontal plane when the guyed tower is in a certain tilt state; In combination with the reference horizontal plane, the tilt angle of the guying tower at any time during operation and the actual vertical height corresponding to any time are obtained; The theoretical height of the guyed tower is obtained, and the displacement of the top of the guyed tower is calculated according to the theoretical height, the actual vertical height and the inclination angle.

2. The method for obtaining the top displacement of a guyed tower according to claim 1, characterized in that: The method for determining the reference horizontal plane is: Determine the positioning point, specifically: when the guyed tower is in a certain tilted state, measure upward from the bottom of the tower at least two symmetrical points with the same distance from the bottom of the tower, and the symmetrical points are the positioning points; The reference plane position is determined by drawing horizontal lines along the tower body with the symmetrical points as reference points, aligning the prepared steel plates with matching sizes with the two horizontal lines and welding them to obtain the reference horizontal plane.

3. The method for obtaining the top displacement of a guyed tower according to claim 1, characterized in that: The method for determining the reference horizontal plane is to find a theoretical horizontal plane at a certain height of the guyed tower from the ground, that is, a plane parallel to the ground when the guyed tower is not tilted.

4. The method for obtaining the top displacement of a guyed tower according to claim 2 or 3, characterized in that: The reference horizontal plane is fixedly arranged at a position where the cable tower is 1.5-2 meters above the ground.

5. The method for obtaining the top displacement of a guyed tower according to claim 1, characterized in that: An inclinometer is used to measure the tilt angle of the cable tower at any time during operation.

6. The method for obtaining the top displacement of a guyed tower according to claim 1, characterized in that: A laser rangefinder is used to measure the actual vertical height of the cable tower at any time during operation.

7. The method for obtaining the top displacement of a guyed tower according to claim 1, characterized in that: The displacement of the top of the guyed tower is calculated according to the theoretical height, actual vertical height and inclination angle, and is specifically calculated by the following formula: D y =h0-h D x =h0·sinθ Among them, Δ y is the vertical displacement of the measuring point A at the top of the guyed tower, Δ x is the horizontal displacement of the measuring point A on the top of the cable tower, h is the actual vertical height of the cable tower at any time during operation, h0 is the theoretical height, and θ is the inclination angle of the cable tower.

8. A system for obtaining displacement of the top of a guyed tower, characterized in that: include: A reference horizontal plane acquisition module is used to determine the reference horizontal plane when the guyed tower is in a certain tilted state; A parameter acquisition module, used to obtain the inclination angle of the cable tower at any time during operation and the actual vertical height corresponding to any time in combination with the reference horizontal plane; The displacement calculation module is used to obtain the theoretical height of the guyed tower and calculate the displacement of the top of the guyed tower according to the theoretical height, the actual vertical height and the inclination angle.

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