CN118067010B - Sag measurement method based on image, storage medium and electronic equipment - Google Patents

Abstract

The present invention discloses an image-based sag measurement method, storage medium and electronic device, comprising the following steps: using a camera to collect images of a gear to be measured and adjacent base pole towers A and base pole towers B; using base pole towers on both sides to establish a straight line in the vertical direction, and respectively converting the proportional relationship between the image distance and the actual distance of the two towers; establishing a vertical plane where the sag curve of the observation gear is located; drawing any tangent of the sag curve of the observation gear in the vertical plane, the tangent has an intersection with two vertical lines in the vertical plane, measuring the image vertical intercept of the tower ground wire hanging point on the corresponding vertical line in the image and the intersection in the vertical direction; converting the actual hanging point intercept of the hanging point according to the proportional relationship between the tower image distance and the actual distance; calculating the sag through two actual tower ground wire hanging point intercepts. The present invention collects the images of two adjacent base pole towers of the observation gear, uses a measuring tool to measure the necessary data required for the sag different length method on the image, and can obtain the sag of the observation gear through the different length method calculation formula.

Description

Image-based sag measurement method, storage medium and electronic device

Technical Field

The invention relates to the technical field of cable maintenance, and in particular to an image-based sag measurement method.

Background Art

At present, the line sag measurement adopts conventional theodolite measurement, which includes the end method, outside method, inside method and side method. However, in mountainous areas, the measurement is inconvenient and the workload is large when each level needs to be measured, especially when measuring the sag in the ice-covered state, the ground is slippery and it is more difficult to measure at the designated site. The existing methods all require many auxiliary components for measurement, and the measurement process is complicated and the calculation process is complicated. However, how to improve the sag measurement efficiency and how to directly calculate the sag of the ground conductor using only the image and the tower structure size information, the existing technology has not disclosed this, so a method as mentioned above is still needed to meet the actual needs.

Summary of the invention

The purpose of the present invention is to provide an image-based sag measurement method, storage medium and electronic device, which can quickly measure the sag when the sag cannot be observed due to topography, obstructions, etc. at construction sites such as ground wire tightening construction and emergency repair, so as to facilitate inspection and observation, as well as sag video monitoring, etc.

The technical solution adopted by the present invention is:

A sag measurement method based on an image comprises the following steps:

Step 1: Use a camera to collect images including the file to be measured and the adjacent base tower A and base tower B;

Step 2: Use the base towers on both sides to establish a straight line in the vertical direction, and use the measuring tool to measure the image distances _la and _{lb in the vertical direction from the corresponding tower ground wire hanging points on the base tower A and the base tower B in the image to the bottom of the tower component (or the appropriate position in the middle), and use the actual distances La and Lb in the} vertical direction from the corresponding tower ground wire hanging points on the base tower A and the base tower B on the known tower diagram to the bottom of the tower component (or the appropriate position in the middle), and calculate the proportional relationship between the image distance and the actual distance of the two towers k _a = _La / _la , k _b = L _b / l _b ;

Step 3: Establish the vertical plane where the observation gear sag curve is located;

Step 4: Draw any tangent line of the observation sag curve in the vertical plane. The tangent line and the two vertical lines in the vertical plane have an intersection point. Measure the image vertical intercepts s _a and s _b in the vertical direction between the tower guide ground wire hanging point on the corresponding vertical line in the image and the intersection point;

Step 5: Using the two measured image vertical intercepts s _a and s _b , the actual hanging point intercepts S _a = s _a × k _a and S _b = s _b × k _b are calculated according to the proportional relationship between the tower image distance and the actual distance;

Step 6: Calculate the sag f= (S _a ^1/2 + S _b ^1/2 ) ² /4 through the two actual tower conductor ground wire hanging point intercepts.

The step 3 specifically includes the following steps: establishing a vertical line at the tower ground wire hanging point at the same side end of the adjacent base towers A and base tower B of the observation gear in the image, and connecting the two hanging points at the same side end of the base tower A and base tower B with a straight line to establish the vertical plane where the sag curve of the observation gear is located.

In the step 2, the vertical straight line is established by using the base towers on both sides. Through the symmetrical structure of the tower in the picture, a horizontal center point is taken at the top and bottom, and then the vertical straight line is obtained by connecting the two centers.

A computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the device where the computer-readable storage medium is located executes the image-based sag measurement method.

An electronic device comprises: a memory and a processor, wherein the memory stores a program that can be run on the processor, and when the processor executes the program, the image-based sag measurement method as described above is implemented.

The present invention collects images of two adjacent pole towers of the observation file, uses a measuring tool to measure the necessary data required by the sag different length method on the image, and can calculate the sag of the observation file through the calculation formula of the different length method.

BRIEF DESCRIPTION OF THE DRAWINGS

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

Fig. 1 is a flow chart of the present invention;

FIG2 is a schematic diagram of the algorithm position of the present invention;

FIG. 3 is a schematic diagram of a specific example of the present invention.

DETAILED DESCRIPTION

The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

As shown in Figures 1 and 2, the present invention comprises the following steps:

Step 1: Use a camera to collect images including the file to be measured and the adjacent base tower A and base tower B;

Step 2: Use the base towers on both sides to establish a straight line in the vertical direction, and use the measuring tool to measure the image distances la and _lb in the vertical direction from the corresponding tower ground wire hanging points on the base tower A and the base tower B to the bottom of the tower component, respectively. Use the actual distances _La and _Lb in the vertical direction from the corresponding tower ground wire hanging points on the base tower _A and the base tower B on the known tower diagram to the bottom of the tower component to convert the proportional relationship between the image distance of the two towers and the actual distance k _a = _La / _la , k _b = L _b / l _b ;

In the step 2, the vertical straight line is established by using the base towers on both sides. Through the symmetrical structure of the tower in the picture, a horizontal center point is taken at the top and bottom, and then the vertical straight line is obtained by connecting the two centers.

Step 3: Establishing a vertical plane where the sag curve of the observation file is located; the step 3 specifically comprises the following steps: establishing a vertical line at the tower ground wire hanging points at the ends of the adjacent base towers A and B on the same side of the observation file in the image, and connecting the two hanging points at the ends of the base towers A and B on the same side with a straight line to establish the vertical plane where the sag curve of the observation file is located;

Step 4: Draw any tangent line of the observation file sag curve. The tangent line intersects with two vertical lines in the vertical plane. Measure the vertical intercepts s _a and s _b of the image in the vertical direction between the hanging point on the corresponding vertical line in the image and the intersection point.

Step 5: Use the two measured vertical intercepts of the image s _a and s _b to calculate the actual intercepts of the hanging point: S _a = s _a × k _a and S _b = s _b × k _b ;

Step 6: Calculate the sag f = (S _a ^1/2 + S _b ^1/2 ) ² /4 using the two actual intercepts of the hanging points.

The present invention uses the tower image to establish the vertical plane where the sag curve is located, uses the tower structure size to inversely calculate the proportional relationship, uses any tangent line to measure the hanging point distance, inversely calculates the hanging point distance, and calculates the sag value. Use a camera to collect images including the observation file and the two adjacent towers.

A computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the device where the computer-readable storage medium is located executes the image-based sag measurement method.

An electronic device comprises: a memory and a processor, wherein the memory stores a program that can be run on the processor, and when the processor executes the program, the image-based sag measurement method as described above is implemented.

The computer program includes computer program code, which may be in source code form, object code form, executable file or some intermediate form, etc. The computer readable medium may include: any entity or device capable of carrying the computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory and other memory, etc.

If the module/unit integrated in the electronic device described in this application is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present application implements all or part of the processes in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware devices through a computer program. The computer program can be stored in a computer-readable storage medium, and when the computer program is executed by the processor, the steps of each of the above-mentioned method embodiments can be implemented.

Furthermore, the computer-readable storage medium may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function, etc.; the data storage area may store data created according to the use of the blockchain node, etc.

The present invention can directly use images to calculate sag. Specifically, it can directly use the structural dimensions of the tower to establish a vertical direction line, establish a vertical plane, and obtain a proportional relationship. The intercept of the surface where the sag is located is measured through the obtained proportional relationship, so that the size of the sag can be obtained through the formula for calculating the sag through the intercept. The whole method is intuitive and simple to calculate, easy to obtain, saves complicated procedures and complex methods, and greatly improves the efficiency of sag measurement.

The following is a further explanation with a specific example. As shown in Figure 3, a 500kV compact line is taken as an example, and a drone is used to take photos of the site. Using the tower structure image, the vertical line is determined, translated to the corresponding conductor hanging point, and after connecting the hanging point line, the tangent is set in the vertical plane, and the tangent point is as close to the center of the span as possible. The _la = 91.56 measured in the figure, the actual tower structure size is _La = 14.1m, then k _a = 14.1/91.56 = 0.153997379, and by the same token, l _b = 385.23 can be obtained. The actual tower structure size is L _b = 21.9m, then k _b = 21.9/385.23 = 0.056849155. The intercepts of the hanging points are s _a =103.05, s _b =100.26, and the corresponding S _a = _ka *s _a =0.153997379*103.05=15.86942991m, S _b =k _b *s _b =0.056849155*100.26=5.69969628m. Finally, the sag f=（S _a ^1/2 + S _b ^1/2 ） ² /4= 10.148m is calculated. The actual measured sag is 10.179m, and the sag error is 0.031m. It meets the specification requirements.

In the description of the present invention, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like, indicating directions and positional relationships based on the directions or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and cannot be understood as limiting the specific protection scope of the present invention.

It should be noted that the terms "including" and "having" and any variations thereof in the specification and claims of the present application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units that are not explicitly listed or are inherent to these processes, methods, products or apparatuses.

Note that the above are only preferred embodiments of the present invention and the principles of the application technology. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the specific embodiments described herein, and may include more other effective embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims (6)

1. An image-based sag measurement method is characterized in that: the method comprises the following steps:

Step 1: acquiring images comprising a to-be-detected file and adjacent base towers A and B by using photographing equipment;

Step 2: establishing a straight line in the vertical direction by using the two side-base towers, measuring the image distance L _a、l_b from the corresponding tower ground wire hanging points on the base towers A and B to the bottom of the iron tower component in the image by using a measuring tool, and converting the proportional relationship k _a=l_a/L_a、k_b=l_b/L_b between the image distance and the actual distance of the two sides of the iron tower by using the known actual distance L _a、L_b from the corresponding tower ground wire hanging points on the base towers A and B to the bottom of the iron tower component;

step 3: establishing a vertical plane in which an observation gear sag curve is located;

step 4: drawing an arbitrary tangent line of an observation gear sag curve in a vertical plane, wherein the tangent line has an intersection point with two vertical lines in the vertical plane, and measuring an image vertical intercept s _a、s_b of a tower ground wire hanging point on a corresponding vertical line and the intersection point in the vertical direction in the image;

Step 5: using two measured vertical intercepts s _a、s_b of the images, and according to the proportional relation between the image distance and the actual distance of the iron tower, calculating the actual hanging point intercept Sa=s _a×k_a、S_b= s_b×k_b of the hanging point;

Step 6: sag f= (S _a ^1/2+ S_b ^1/2）²/4) is calculated from the intercept of the two actual tower ground lead suspension points.

2. The image-based sag measurement method according to claim 1, wherein: the step 3 specifically comprises the following steps: and at the hanging points of the ground wire of the tower at the same side end part of the adjacent foundation tower A and the foundation tower B of the observation gear in the image, establishing a vertical line, and simultaneously establishing a vertical plane where an arc sag curve of the observation gear is located by connecting two hanging points at the same side end part of the foundation tower A and the foundation tower B by a straight line.

3. The image-based sag measurement method according to claim 2, wherein: in the step 2, a straight line in the vertical direction is established by utilizing the towers on the two sides, a horizontal center point is respectively taken up and down through a symmetrical structure of an iron tower in a picture, and then the straight line in the vertical direction can be obtained by connecting the upper center and the lower center.

4. The image-based sag measurement method according to claim 3, wherein: the image is acquired by taking a photograph of an unmanned aerial vehicle and a mobile phone of a field person.

5. A computer readable storage medium having stored thereon a computer program, which when executed by a processor causes the computer readable storage medium to perform the image-based sag measurement method according to any one of claims 1-4.

6. An electronic device, comprising: a memory and a processor, the memory having stored thereon a program executable on the processor, the processor implementing the image-based sag measurement method according to any one of claims 1-4 when executing the program.