A method for measuring the shape of a high-voltage cable

Abstract

The application relates to the technical field of engineering survey, in particular to a high-voltage cable line shape measurement method, which can solve the problem that it is difficult to directly measure the elevation of a high-voltage cable. The method comprises the following steps: acquiring any three control points, the spatial coordinates of the three control points being known values; establishing a first reference point, acquiring the spatial coordinates of the first reference point; establishing a second reference point, acquiring the spatial coordinates of the second reference point; obtaining an expression of the projection of the high-voltage cable on a horizontal plane according to the projection of the spatial coordinates of the first reference point and the second reference point on the horizontal plane; calculating the horizontal coordinates of a to-be-measured point according to the expression of the projection of the high-voltage cable on the horizontal plane, establishing a third reference point, and acquiring the spatial coordinates of the third reference point; measuring the vertical angle between the third reference point and the to-be-measured point, calculating the elevation coordinates of the to-be-measured point, and then obtaining the line shape of the high-voltage cable.

Description

Technical Field

[0001] The present application relates to the field of engineering measurement technology, and in particular to a method for measuring the linear shape of a high-voltage cable. Background Art

[0002] Power transmission safety is the cornerstone of economic development. High-voltage transmission lines are the essential pathways for electricity to reach factories and homes from power plants. High-voltage transmission lines are primarily overhead lines supported by towers and insulated by insulators and air. High-voltage transmission lines are generally used for long-distance power transmission, and boosting the voltage for transmission effectively reduces losses. Furthermore, to reduce installation costs, high-voltage cables are often routed overhead when crossing valleys and rivers.

[0003] In some processes involving high-voltage cable construction projects, in order to determine whether the safety distance between the construction project and the existing high-voltage cables meets the safety requirements, it is necessary to measure the elevation of a certain point on the existing high-voltage cables.

[0004] However, due to the large span of high-voltage cables and the fact that they cross valleys and rivers, it is difficult to directly measure the elevation of high-voltage cables, which makes it difficult to determine the actual line shape, and ultimately makes it difficult to determine the positional relationship and safety distance between the high-voltage cables and construction projects. Summary of the Invention

[0005] In order to solve the problem of high difficulty in directly measuring the elevation of high-voltage cables, the present application provides a method for measuring the linear shape of high-voltage cables.

[0006] The embodiment of the present application is implemented as follows:

[0007] The present invention provides a method for measuring the linear shape of a high-voltage cable, the method comprising:

[0008] Obtain any three control points, where the spatial coordinates of the three control points are known values;

[0009] Establishing a first reference point and obtaining spatial coordinates of the first reference point, wherein the first reference point is located on the high-voltage cable;

[0010] Establishing a second reference point and obtaining the spatial coordinates of the second reference point, wherein the second reference point is also located on the high-voltage cable;

[0011] According to the projection of the spatial coordinates of the first reference point and the second reference point on the horizontal plane, an expression for the projection of the high-voltage cable on the horizontal plane is obtained;

[0012] Calculate the horizontal coordinates of the point to be measured according to the expression of the projection of the high-voltage cable on the horizontal plane, establish a third reference point, and obtain the spatial coordinates of the third reference point, wherein the third reference point is located at a position where the point to be measured can be observed;

[0013] The vertical angle between the third reference point and the point to be measured is measured, and the elevation coordinates of the point to be measured are calculated to obtain the linear shape of the high-voltage cable.

[0014] In some embodiments, in the steps of establishing a first reference point and obtaining the spatial coordinates of the first reference point, the method includes:

[0015] Establishing a first auxiliary point and obtaining spatial coordinates of the first auxiliary point, wherein the first auxiliary point is located at a position where the high-voltage cable can be observed;

[0016] Establishing a first reference point, wherein the first reference point is set at a position on the high-voltage cable that is relatively close to the first auxiliary point, and parameters between the first reference point and the first auxiliary point are measurable;

[0017] Parameters between the first auxiliary point and the first reference point are measured, and spatial coordinates of the first reference point are calculated based on the measured parameters and the spatial coordinates of the first auxiliary point.

[0018] In some embodiments, in the step of obtaining the spatial coordinates of the first auxiliary point, the method includes:

[0019] With the first auxiliary point as the endpoint, establish three rays towards the three standard points to form three angles;

[0020] measuring a first azimuth angle, wherein the first azimuth angle is set to any one of three included angles;

[0021] measuring a second azimuth angle, wherein the second azimuth angle is set to any one of the remaining two angles after removing the first azimuth angle from the three included angles;

[0022] According to the first azimuth, the second azimuth and the spatial coordinates of the three known standard points, the spatial coordinates of the first auxiliary point are obtained through the rear interactive function of the total station.

[0023] In some embodiments, in the step of measuring a parameter between the first auxiliary point and the first reference point, the method includes:

[0024] Placing a total station at a first auxiliary point of the measured spatial coordinates, and adjusting the objective lens of the total station to align with a first reference point of the high-voltage cable; wherein the laser emitted by the total station can be reflected by the high-voltage cable and received by the total station;

[0025] Record the azimuth, vertical angle, distance and other parameters measured by the total station at this time.

[0026] In some embodiments, in the step of establishing the second reference point and obtaining the spatial coordinates of the second reference point, the method comprises:

[0027] establishing a second auxiliary point and obtaining the spatial coordinates of the second auxiliary point, wherein the second auxiliary point is located at a position where the high-voltage cable can be observed;

[0028] establishing a second reference point, wherein the second reference point is arranged at a position close to the second auxiliary point on the high-voltage cable, and a parameter between the second reference point and the second auxiliary point is measurable;

[0029] measuring the parameter between the second auxiliary point and the second reference point, and calculating the spatial coordinates of the second reference point according to the measured parameter and the spatial coordinates of the second auxiliary point.

[0030] In some embodiments, in the step of obtaining the spatial coordinates of the second auxiliary point, the method comprises:

[0031] establishing three rays towards the three standard points with the second auxiliary point as an end point to form three included angles;

[0032] measuring a third azimuth angle, wherein the third azimuth angle is arranged as any one of the three included angles;

[0033] measuring a fourth azimuth angle, wherein the fourth azimuth angle is arranged as any one of the remaining two angles after removing the third azimuth angle from the three included angles;

[0034] obtaining the spatial coordinates of the second auxiliary point through the total station rear interactive function according to the third azimuth angle, the fourth azimuth angle, and the spatial coordinates of the three standard points.

[0035] In some embodiments, in the step of calculating the horizontal coordinates of the point to be measured according to the expression of the projection of the high-voltage cable on the horizontal plane, establishing a third reference point, and obtaining the spatial coordinates of the third reference point, the method comprises:

[0036] obtaining the horizontal coordinates of the point to be measured on the projection of the high-voltage cable on the horizontal plane according to any horizontal coordinates of the point to be measured and the expression of the projection of the high-voltage cable on the horizontal plane;

[0037] finding a third reference point that facilitates the observation of the point to be measured according to the obtained horizontal coordinates of the point to be measured, and obtaining the spatial coordinates of the third reference point.

[0038] In some embodiments, in the step of obtaining the spatial coordinates of the third reference point, the method comprises:

[0039] establishing three rays towards the three standard points with the third auxiliary point as an end point to form three included angles;

[0040] measuring a fifth azimuth, wherein the fifth azimuth is set to any one of the three included angles;

[0041] measuring a sixth azimuth angle, wherein the sixth azimuth angle is set to any one of the two remaining angles after removing the third azimuth angle from the three included angles;

[0042] According to the fifth azimuth, the sixth azimuth and the spatial coordinates of the three known standard points, the spatial coordinates of the third reference point are obtained through the interactive function at the rear of the total station.

[0043] In some embodiments, in the step of measuring the vertical angle between the third reference point and the point to be measured, the method includes:

[0044] Place a total station at the third reference point, input the horizontal coordinates of the point to be measured into the total station, and make the total station face the direction of the point to be measured in the horizontal plane;

[0045] Keep the total station in the horizontal plane and rotate the total station objective lens vertically so that the objective lens crosshairs are aligned with the high-voltage cable; record the vertical angle of the total station.

[0046] In some embodiments, the following expression is used to calculate the elevation coordinates of the point to be measured:

[0047] H K =H H +L tanγ

[0048] Among them, H K represents the elevation of the point to be measured, HH represents the elevation of the third reference point, L represents the distance between the projection of the point to be measured and the third reference point on the horizontal plane, and γ represents the vertical angle between the third reference point and the point to be measured.

[0049] The beneficial effects of the present application are as follows: the expression of the projection of the high-voltage cable on the horizontal plane is obtained by obtaining the horizontal coordinates of two different locations of the high-voltage cable, and the horizontal coordinates of the point to be measured are obtained based on the expression, so as to select the position of the third reference point for measuring the elevation of the point to be measured, which can improve the efficiency of obtaining the spatial coordinates of the point to be measured, and can solve the defect of high difficulty in directly measuring the elevation of the point to be measured; further, the expression of the projection of the high-voltage cable on the horizontal plane is obtained by the first reference point and the second reference point, which reduces the probability of inconvenience in directly measuring the linear shape of the high-voltage cable, and can improve the efficiency of measuring the linear shape of the projection of the high-voltage cable on the horizontal plane. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0051] Figure 1 This is a flow chart of a method for measuring the linear shape of a high-voltage cable according to an embodiment of the present application;

[0052] Figure 2 This is a schematic diagram of the points of a method for measuring the linear shape of a high-voltage cable according to an embodiment of the present application;

[0053] Figure 3 This is a schematic diagram of measuring the spatial coordinates of a first auxiliary point D in a method for measuring the linear shape of a high-voltage cable according to another embodiment of the present application;

[0054] Figure 4 This is a schematic diagram of measuring the spatial coordinates of a first reference point F in a method for measuring the linear shape of a high-voltage cable according to another embodiment of the present application;

[0055] Figure 5 This is a schematic diagram of measuring the spatial coordinates of a second auxiliary point E in a method for measuring the linear shape of a high-voltage cable according to another embodiment of the present application;

[0056] Figure 6 This is a schematic diagram of measuring the spatial coordinates of a second reference point G in a method for measuring the linear shape of a high-voltage cable according to another embodiment of the present application;

[0057] Figure 7 This is a schematic diagram of measuring the spatial coordinates of a third reference point H in a method for measuring the linear shape of a high-voltage cable according to another embodiment of the present application.

[0058] Description of the accompanying drawings: 1. High-voltage cable. DETAILED DESCRIPTION

[0059] In order to make the purpose, implementation mode and advantages of the present application clearer, the exemplary implementation mode of the present application will be clearly and completely described below in conjunction with the drawings in the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only part of the embodiments of the present application, not all of the embodiments.

[0060] It should be noted that the brief descriptions of terms in this application are only for the purpose of facilitating the understanding of the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise specified, these terms should be understood according to their ordinary and usual meanings.

[0061] In the specification and claims of this application and the accompanying drawings, the terms "first," "second," "third," etc. are used to distinguish similar or similar objects or entities, and are not necessarily intended to limit a particular order or sequence, unless otherwise noted. It should be understood that the terms used in this manner are interchangeable under appropriate circumstances.

[0062] The terms "comprise," "comprises," and "having," and any variations thereof, are intended to cover but not exclude inclusion; for example, a product or device comprising a list of components is not necessarily limited to all the components expressly listed but may include other components not expressly listed or inherent to such product or device.

[0063] When high-voltage cables are being erected, they are supported by towers. Since the main materials that make up the high-voltage cables have their own weight, the projection of the high-voltage cables in the vertical direction is a catenary, and in the horizontal plane is a straight line. When the high-voltage cables to be constructed need to pass through existing high-voltage cables, it is necessary to obtain the elevation of the erection point of the high-voltage cables to ensure that there is a sufficient safety distance between the two high-voltage cables.

[0064] like Figure 1-2 shown. Figure 1 This is a flow chart of a method for measuring the linear shape of a high-voltage cable according to an embodiment of the present application; Figure 2 This is a schematic diagram of the points of a high-voltage cable linear measurement method according to an embodiment of the present application.

[0065] In some embodiments, the present application provides a method for measuring the linear shape of a high-voltage cable 1, which includes: obtaining any three control points, wherein the spatial coordinates of the three control points are known values, the three control points are named A, B and C respectively, and the spatial coordinate of point A is expressed as (X A , Y A , H A ), the spatial coordinates of point B are expressed as (X B , Y B , H B ), the spatial coordinates of point C are expressed as (X C , Y C , H C ).

[0066] Establish a first reference point F and obtain the spatial coordinates of the first reference point F. The spatial coordinates of the first reference point F are expressed as (X F , Y F , H F ), wherein the first reference point F is located on the high-voltage cable 1, and the spatial coordinates of the first reference point F can be obtained by direct measurement or indirect measurement.

[0067] A second reference point G is established, and the spatial coordinates of the second reference point G are obtained, which are represented as (X G , Y G , H G ). The second reference point G is also located on the high-voltage cable 1, and the second reference point G and the first reference point F are located at different positions of the high-voltage cable 1. Meanwhile, the second reference point G is obtained in the same manner as the first reference point F.

[0068] Since the high-voltage cable 1 is projected as a straight line on the horizontal plane, the projection of the spatial coordinates of the first reference point F and the second reference point G on the horizontal plane, i.e., (X F , Y F ) and (X G , Y G ), are obtained, thereby obtaining the expression of the projection of the high-voltage cable 1 on the horizontal plane.

[0069] According to the expression of the projection of the high-voltage cable 1 on the horizontal plane, the horizontal coordinates (X K , Y K ) of the to-be-measured point K are obtained, a third reference point H is established, and the spatial coordinates (X H , Y H , H H ) of the third reference point H are obtained. The third reference point H is located at a position where the to-be-measured point K can be observed, and the third reference point H is obtained in the same manner as the first reference point F.

[0070] The vertical angle between the third reference point H and the to-be-measured point K is measured, and the elevation coordinate H K of the to-be-measured point K is calculated. Finally, the spatial coordinates of the to-be-measured point K are obtained as (X K , Y K , H K ), and the line shape of the high-voltage cable 1 is obtained, which facilitates the determination of the safety distance between the construction project and the existing cable.

[0071] The expression of the projection of the high-voltage cable 1 on the horizontal plane is obtained through the horizontal coordinates of two different points of the high-voltage cable 1, and the horizontal coordinates of the to-be-measured point are obtained according to the expression, so as to select the position of the third reference point for measuring the elevation of the to-be-measured point, thereby improving the efficiency of obtaining the spatial coordinates of the to-be-measured point and solving the defect that it is difficult to directly measure the elevation of the to-be-measured point. Furthermore, the expression of the projection of the high-voltage cable 1 on the horizontal plane is obtained through the spatial coordinates of the first reference point and the second reference point, thereby reducing the inconvenience of directly measuring the line shape of the high-voltage cable 1 and improving the efficiency of measuring the line shape of the projection of the high-voltage cable 1 on the horizontal plane.

[0072] In some embodiments, in order to solve the problem that it is difficult to directly measure the spatial coordinates of the first reference point, the following measurement method is used, which includes: establishing a first auxiliary point D, obtaining the spatial coordinates of the first auxiliary point D (X D , Y D , H D ), wherein the first auxiliary point D is located at a position where the high-voltage cable 1 can be observed.

[0073] A first reference point F is established, wherein the first reference point F is set at a position on the high-voltage cable 1 that is relatively close to the first auxiliary point D, and parameters between the first reference point F and the first auxiliary point D are measurable.

[0074] Measure the parameters between the first auxiliary point D and the first reference point F, and according to the measured parameters and the spatial coordinates (X D , Y D , H D ) calculate the spatial coordinates (X F , Y F , H F ).

[0075] By establishing the spatial coordinates of the first auxiliary point D to indirectly obtain the spatial coordinates of the first reference point F, the difficulty of directly measuring the spatial coordinates of the first reference point F can be reduced, thereby improving the efficiency and safety of measuring the spatial coordinates of the first reference point F and reducing the probability of needing to climb high during measurement.

[0076] like Figure 3 shown. Figure 3 This is a schematic diagram of measuring the spatial coordinates of a first auxiliary point D in a method for measuring the linear shape of a high-voltage cable according to another embodiment of the present application.

[0077] In some embodiments, in the step of obtaining the spatial coordinates of the first auxiliary point D, the measurement method includes: using the first auxiliary point D as an endpoint, establishing three rays toward the three standard points A, B, and C, the three rays converging at the first auxiliary point D and forming three included angles; measuring a first azimuth angle α1, wherein the first azimuth angle α1 is set to any one of the three included angles; measuring a second azimuth angle β1, wherein the second azimuth angle β1 is set to any one of the remaining two of the three included angles after removing the first azimuth angle α1; based on the first azimuth angle α1, the second azimuth angle β1, and the known spatial coordinates of the three standard points A, B, and C, the spatial coordinates (X D , Y D , H D ).

[0078] like Figure 4 As shown, Figure 4This is a schematic diagram of measuring the spatial coordinates of a first reference point F in a method for measuring the linear shape of a high-voltage cable according to another embodiment of the present application.

[0079] In some embodiments, in the step of measuring the parameters between the first auxiliary point D and the first reference point F, the measurement method includes: placing the total station at the measured spatial coordinates (X D , Y D , H D ), adjust the objective lens of the total station to align with the first reference point F of the high-voltage cable 1; wherein, the laser emitted by the total station can be reflected on the high-voltage cable 1 and received by the total station; record the azimuth, vertical angle, distance and other parameters measured by the total station at this time, wherein the azimuth represents the horizontal angle between the direction line from the north direction line of the first auxiliary point D to the first reference point F in a clockwise direction; the vertical angle represents; the vertical angle represents the angle between the direction line from the first auxiliary point D to the target point first reference point F and the horizontal line in the same vertical plane.

[0080] like Figure 5-Figure 6 As shown, Figure 5 This is a schematic diagram of measuring the spatial coordinates of a second auxiliary point E in a method for measuring the linear shape of a high-voltage cable according to another embodiment of the present application; Figure 6 This is a schematic diagram of measuring the spatial coordinates of a second reference point G in a method for measuring the linear shape of a high-voltage cable according to another embodiment of the present application.

[0081] In some embodiments, during the process of establishing the second reference point G and obtaining the spatial coordinates of the second reference point G, the measurement method includes: establishing a second auxiliary point E and obtaining the spatial coordinates (X E , Y E , H E ), wherein the second auxiliary point E is located at a position where the high-voltage cable 1 can be observed.

[0082] A second reference point G is established, wherein the second reference point G is set at a position on the high-voltage cable 1 that is closer to the second auxiliary point E, and parameters between the second reference point G and the second auxiliary point E are measurable.

[0083] The parameters between the second auxiliary point E and the second reference point G are measured in the same way as the parameters between the first auxiliary point D and the first reference point F. The measured parameters also include azimuth, vertical angle and distance. According to the measured parameters and the spatial coordinates (X E , Y E , H E ) calculate the spatial coordinates (X G , Y G , H G ).

[0084] In some embodiments, in the step of obtaining the spatial coordinates of the second auxiliary point E, the measurement method includes: taking the second auxiliary point E as an endpoint, establishing three rays toward the three standard points A, B, and C to form three angles; measuring a third azimuth angle α2, wherein the third azimuth angle α2 is set to any one of the three angles; measuring a fourth azimuth angle β2, wherein the fourth azimuth angle β2 is set to any one of the two remaining angles after removing the third azimuth angle α2 from the three angles; and directly obtaining the spatial coordinates (X) of the second auxiliary point E using the rear interaction function of the total station based on the third azimuth angle α2, the fourth azimuth angle β2, and the known spatial coordinates of the three standard points A, B, and C. E , Y E , H E ).

[0085] In some embodiments, on the basis of having obtained the spatial coordinates of the first reference point F and the second reference point G, in order to measure the linear shape of the high-voltage cable 1, and since the projection of the high-voltage cable 1 on the horizontal plane between the two towers is a straight line, after measuring the coordinates of points F and G, the expression of the projection of the high-voltage cable 1 on the horizontal plane can be known. Assuming that any point to be measured on the high-voltage cable 1 is K, its Y coordinate can be obtained by knowing its X coordinate, or its X coordinate can be obtained by knowing its Y coordinate, but the H coordinate of point K needs to be further measured.

[0086] In the process of measuring the H coordinate of point K, since the horizontal coordinate of point K (X K , Y K ), so first find a third reference point H near point K that is convenient for observation, and obtain the spatial coordinates of the third reference point H (X H , Y H , H H ).

[0087] like Figure 7 As shown, Figure 7 This is a schematic diagram of measuring the spatial coordinates of a third reference point H in a method for measuring the linear shape of a high-voltage cable according to another embodiment of the present application.

[0088] In some embodiments, in the step of measuring the spatial coordinates of the third reference point H, the measuring method comprises: establishing three rays towards the three standard points A, B and C with the third reference point H as the end point, the three rays converging at the third reference point H and forming three included angles; measuring a fifth azimuth angle a3, wherein the fifth azimuth angle a3 is set as any one of the three included angles; measuring a sixth azimuth angle b3, wherein the sixth azimuth angle b3 is set as any one of the remaining two after removing the fifth azimuth angle a3 from the three included angles; and directly obtaining the spatial coordinates (X H , Y H , H H ) of the third reference point H using the back-interaction function of the total station according to the fifth azimuth angle a3, the sixth azimuth angle b3 and the known spatial coordinates of the three standard points A, B and C.

[0089] In some embodiments, in the step of measuring the vertical angle between the third reference point H and the point to be measured K, the measuring method is as follows: setting up the total station at the H point, inputting the X coordinate and the Y coordinate of the K point, and then using the total station lofting function to loft the K point, so that the total station aims at the K point in the horizontal direction. Then, without rotating the total station in the horizontal plane, the total station objective is vertically rotated so that the crosshairs of the objective align with the K point on the high-voltage cable 1, and the vertical angle g of the total station at this time is recorded, which is the vertical angle between the third reference point H and the point to be measured K.

[0090] In some embodiments, in the process of obtaining the H coordinate of the point to be measured K, the following formula is used:

[0091] H K = H H + L tan g

[0092] wherein H K represents the elevation of the point to be measured, H H represents the elevation of the third reference point, L represents the distance between the point to be measured and the third reference point in the horizontal plane projection, and g represents the vertical angle between the third reference point and the point to be measured.

[0093] Meanwhile, since the horizontal coordinates of both the point to be measured K and the third reference point H are known values, the distance between the point to be measured K and the third reference point H in the horizontal plane projection can be expressed as

[0094] In some embodiments, the third reference point H can also be selected from any one of the three standard points A, B and C, the first auxiliary point D and the second auxiliary point E. In this embodiment, the third reference point H is separately built for the convenience of on-site observation operation.

[0095] The beneficial effect of the embodiments of the present part is that the expression of the horizontal plane projection of the high-voltage cable 1 is obtained through the horizontal coordinates of two different sites of the high-voltage cable 1, and then the horizontal coordinates of the to-be-measured point are obtained according to the expression, so as to select the position of the third reference point for measuring the elevation of the to-be-measured point, which can realize the effect of improving the efficiency of obtaining the spatial coordinates of the to-be-measured point, and can realize the effect of solving the defect that it is difficult to directly measure the elevation of the to-be-measured point; further, the expression of the horizontal plane projection of the high-voltage cable 1 is obtained through the spatial coordinates of the first reference point and the second reference point, which reduces the probability of inconvenience of directly measuring the linear shape of the high-voltage cable 1, and can realize the effect of improving the efficiency of measuring the linear shape of the horizontal plane projection of the high-voltage cable 1.

[0096] The above description has been made in conjunction with specific embodiments for the convenience of explanation. However, the above description discussed in some embodiments is not intended to be exhaustive or to limit the embodiments to the specific forms disclosed. Various modifications and variations can be derived from the above teachings. The selection and description of the above embodiments are to better explain the principles and practical applications, so that those skilled in the art can better use the embodiments and various different modified embodiments suitable for specific use considerations.

Claims

1. A method for measuring the linear shape of a high-voltage cable, characterized in that: The method comprises: Obtain any three standard points, where the spatial coordinates of the three standard points are known values; Establishing a first reference point and obtaining spatial coordinates of the first reference point, wherein the first reference point is located on the high-voltage cable; Establishing a second reference point and obtaining the spatial coordinates of the second reference point, wherein the second reference point is also located on the high-voltage cable; According to the projection of the spatial coordinates of the first reference point and the second reference point on the horizontal plane, an expression for the projection of the high-voltage cable on the horizontal plane is obtained; Calculate the horizontal coordinates of the point to be measured according to the expression of the projection of the high-voltage cable on the horizontal plane, establish a third reference point, and obtain the spatial coordinates of the third reference point, wherein the third reference point is located at a position where the point to be measured can be observed; Measuring the vertical angle between the third reference point and the point to be measured, calculating the elevation coordinates of the point to be measured, and then obtaining the line shape of the high-voltage cable; In the steps of establishing a first reference point and obtaining the spatial coordinates of the first reference point, the method includes: Establishing a first auxiliary point and obtaining spatial coordinates of the first auxiliary point, wherein the first auxiliary point is located at a position where the high-voltage cable can be observed; Establishing a first reference point, wherein the first reference point is set at a position on the high-voltage cable that is relatively close to the first auxiliary point, and parameters between the first reference point and the first auxiliary point are measurable; Measuring parameters between the first auxiliary point and the first reference point, and calculating the spatial coordinates of the first reference point based on the measured parameters and the spatial coordinates of the first auxiliary point; In the step of obtaining the spatial coordinates of the first auxiliary point, the method includes: With the first auxiliary point as the endpoint, establish three rays towards the three standard points to form three angles; measuring a first azimuth angle, wherein the first azimuth angle is set to any one of three included angles; measuring a second azimuth angle, wherein the second azimuth angle is set to any one of the remaining two angles after removing the first azimuth angle from the three included angles; According to the first azimuth, the second azimuth and the spatial coordinates of the three known standard points, the spatial coordinates of the first auxiliary point are obtained through the rear interactive function of the total station.

2. The high-voltage cable linear measurement method according to claim 1, characterized in that: In the step of measuring parameters between the first auxiliary point and the first reference point, the method includes: Placing a total station at a first auxiliary point of the measured spatial coordinates, and adjusting the objective lens of the total station to align with a first reference point of the high-voltage cable; wherein the laser emitted by the total station can be reflected by the high-voltage cable and received by the total station; Record the azimuth, vertical angle, distance and other parameters measured by the total station at this time.

3. The high-voltage cable linear measurement method according to claim 1, characterized in that: In the steps of establishing a second reference point and obtaining the spatial coordinates of the second reference point, the method includes: Establishing a second auxiliary point and obtaining the spatial coordinates of the second auxiliary point, wherein the second auxiliary point is located at a position where the high-voltage cable can be observed; Establishing a second reference point, wherein the second reference point is set at a position on the high-voltage cable that is closer to the second auxiliary point, and parameters between the second reference point and the second auxiliary point are measurable; Parameters between the second auxiliary point and the second reference point are measured, and the spatial coordinates of the second reference point are calculated based on the measured parameters and the spatial coordinates of the second auxiliary point.

4. The high-voltage cable linear measurement method according to claim 3, characterized in that: In the step of obtaining the spatial coordinates of the second auxiliary point, the method includes: With the second auxiliary point as the endpoint, establish three rays towards the three standard points to form three angles; Measuring the third-party angle, where the third-party angle is set to any one of the three included angles; measuring a fourth azimuth angle, wherein the fourth azimuth angle is set to any one of the two remaining angles after removing the third azimuth angle from the three included angles; According to the third azimuth, the fourth azimuth and the spatial coordinates of the three known standard points, the spatial coordinates of the second auxiliary point are obtained through the rear interactive function of the total station.

5. The high-voltage cable linear measurement method according to claim 1, characterized in that: In the steps of calculating the horizontal coordinates of the point to be measured based on the expression of the projection of the high-voltage cable on the horizontal plane, establishing a third reference point, and obtaining the spatial coordinates of the third reference point, the method includes: According to the arbitrary horizontal coordinates of the point to be measured and the expression of the projection of the high-voltage cable on the horizontal plane, the horizontal coordinates of the point to be measured on the high-voltage cable are obtained; According to the obtained horizontal coordinates of the point to be measured, a third reference point is found that is convenient for observing the point to be measured, and the spatial coordinates of the third reference point are obtained.

6. The high-voltage cable linear measurement method according to claim 5, characterized in that: In the step of obtaining the spatial coordinates of the third reference point, the method includes: With the third auxiliary point as the endpoint, establish three rays towards the three standard points to form three angles; measuring a fifth azimuth, wherein the fifth azimuth is set to any one of the three included angles; measuring a sixth azimuth angle, wherein the sixth azimuth angle is set to any one of the two remaining angles after removing the third azimuth angle from the three included angles; According to the fifth azimuth, the sixth azimuth and the spatial coordinates of the three known standard points, the spatial coordinates of the third reference point are obtained through the interactive function at the rear of the total station.

7. The high-voltage cable linear measurement method according to claim 1, characterized in that: In the step of measuring the vertical angle between the third reference point and the point to be measured, the method includes: Place a total station at the third reference point, input the horizontal coordinates of the point to be measured into the total station, and make the total station face the direction of the point to be measured in the horizontal plane; Keep the total station fixed in the horizontal plane and rotate the total station objective lens vertically so that the objective lens crosshairs are aligned with the high-voltage cable; Record the vertical angle of the total station.

8. The high-voltage cable linear measurement method according to claim 1, wherein: Use the following expression to calculate the elevation coordinates of the point to be measured: H K =H H +L tanγ Among them, H K Indicates the elevation of the point to be measured, H H represents the elevation of the third reference point, L represents the distance between the point to be measured and the projection of the third reference point on the horizontal plane, and γ represents the vertical angle between the third reference point and the point to be measured.

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