Precision Photogrammetric Control Surveying Method, Apparatus and System

Abstract

The present application provides a precise photogrammetric control measurement method, device and system. The method includes: obtaining the control point coordinates of a plurality of control points arranged in the surrounding area of the object to be measured; a plurality of measured points are arranged on the object to be measured; by using a first total station instrument installed at a first measurement station, obtaining the first positional relationship between the first total station instrument and the control points, and obtaining the second positional relationship between the first total station instrument and the measured points; the first positional relationship includes the first distance, the first horizontal angle and the first zenith distance between the first total station instrument and the control points, and the second positional relationship includes the second distance, the second horizontal angle and the second zenith distance between the first total station instrument and the measured points; according to the control point coordinates of the control points, the first positional relationship and the second positional relationship, obtaining the measured point coordinates of the measured points, and determining the contour of the object to be measured according to the measured point coordinates. The method of the present application can accurately measure the coordinates of the measured points of the object to be measured.

Description

Technical Field

[0001] This application relates to the field of surveying and mapping technology, and in particular, to a precise photogrammetric control measurement method, device, and system. Background Art

[0002] When a device leaves the factory, it is necessary to perform contour detection on the device to ensure that the contour of the device leaving the factory meets the device quality requirements.

[0003] In the related art, for a device with a circular end face, by using a measuring tool such as a flexible ruler to measure, the distance between two points whose connecting line at the end face of the measured device passes through the center of the circle is obtained, and whether the end face contour of the device is circular is judged according to the measured distance.

[0004] However, for large-sized devices, this method has problems of difficult measurement and inaccurate measurement. In the case where there are obstacles between two points, the method of the related art has the problem of being unable to measure the end face contour of the device. In addition, this method can only measure the end contour of the device, and cannot measure the contour of the area between the two end faces of the device. Summary of the Invention

[0005] Embodiments of this application provide a precise photogrammetric control measurement method, device, and system to solve the problem of the method in the prior art that cannot simply and accurately measure the contour of an object to be measured.

[0006] In a first aspect, embodiments of this application provide a precise photogrammetric control measurement method, including: obtaining the control point coordinates of a plurality of control points arranged in the surrounding area of the object to be measured; a plurality of measurement points are arranged on the object to be measured; by using a first total station instrument installed at a first measuring station, obtaining the first position relationship between the first total station instrument and the control points, and obtaining the second position relationship between the first total station instrument and the measurement points; the first position relationship includes the first distance, first horizontal angle, and first zenith distance between the first total station instrument and the control points, and the second position relationship includes the second distance, second horizontal angle, and second zenith distance between the first total station instrument and the measurement points; according to the control point coordinates of the control points, the first position relationship, and the second position relationship, obtaining the measurement point coordinates of the measurement points, and determining the contour of the object to be measured according to the measurement point coordinates.

[0007] Optionally, the obtaining of control point coordinates of a plurality of control points arranged in the surrounding area of ​​the measured object includes: obtaining a third positional relationship between the second total station and the control points by means of a second total station set up at a second measuring station; the third positional relationship includes a third distance, a third horizontal angle and a third zenith distance between the second total station and the control points; and obtaining the control point coordinates of the control points according to the preset measuring station coordinates of the second measuring station and the third positional relationship.

[0008] Optionally, there are multiple second survey stations and multiple control points, and the second survey stations are located in the area between the measured object and the control points; the third position relationship between the second total station and the control points is obtained by using a second total station set up at the second survey station, including: for each second total station set up at the second survey station, measuring the third position relationship between the second total station and each of the control points that are in line of sight with the second total station in a clockwise or counterclockwise direction.

[0009] Optionally, for each second total station set up at the second survey station, the third positional relationship between the second total station and each of the control points in sight with the second total station is measured in sequence in a clockwise or counterclockwise measuring direction, including: for each second total station set up at the second survey station, obtaining a first target control point corresponding to the second total station from the control points in sight with the second total station; taking the first target control point as the backsight starting direction of the second total station, and measuring the third positional relationship between the second total station and each of the control points in sight with the second total station in sequence in a clockwise or counterclockwise direction.

[0010] Optionally, the control points include at least control points located at four first corner points of the area around the measured object; the second measuring station includes at least second measuring stations located at four second corner points of the area between the measured object and the control points; for each second total station set up at the second measuring station, the first target control points corresponding to the second total station are obtained from the control points in line of sight with the second total station, including: in a clockwise or counterclockwise arrangement direction, the four control points located at the four first corner points are respectively determined as the first target control points corresponding one-to-one to the second measuring stations located at the four second corner points.

[0011] Optionally, at least one control point is arranged between every two control points at adjacent first corner points; wherein each control point has line of sight with the second total stations at at least three second survey stations.

[0012] Optionally, according to the preset station coordinates of the second station and the third positional relationship, the control network point coordinates of the control network point are obtained, including: using the preset station coordinates of the second station and the third positional relationship as input parameters of an adjustment algorithm, and calculating the control network point coordinates of the control network point through the adjustment algorithm.

[0013] Optionally, there are multiple first survey stations and multiple control points, and the first survey stations are located in the area between the measured object and the control points; a first position relationship between the first total station and the control points is obtained by setting up a first total station at the first survey station, and a second position relationship between the first total station and the measured points is obtained, including: for each first total station set up at the first survey station, the first position relationship between the first total station and each of the control points that are in sight with the first total station is obtained in a clockwise or counterclockwise direction, and the second position relationship between the first total station and the measured points that are in sight with the first total station is obtained.

[0014] Optionally, for each first total station set up at the first survey station, the first position relationship between the first total station and each of the control points in sight with the first total station is obtained in sequence in a clockwise or counterclockwise measuring direction, and the second position relationship between the first total station and the measured point in sight with the first total station is obtained, including: for each first total station set up at the first survey station, a second target control point corresponding to the first total station is obtained from the control points in sight with the first total station; the second target control point is used as the backsight starting direction of the first total station, and the first position relationship between the first total station and each of the control points in sight with the first total station is measured in sequence in a clockwise or counterclockwise direction, and the second position relationship between the first total station and each of the measured points in sight with the first total station is measured in sequence.

[0015] Optionally, the multiple control points include control points located at four first corner points of the area around the measured object, and a control point is arranged between every two adjacent first corner points; the first measuring station includes at least eight first measuring stations located in the area between the measured object and the control points; for each first total station set up at the first measuring station, the second target control points corresponding to the first total station are obtained from the control points in line of sight with the first total station, including: according to a clockwise or counterclockwise arrangement direction, the eight control points are respectively determined as second target control points corresponding one-to-one to the first measuring station.

[0016] Optionally, the first total station at each of the first survey stations has line of sight with at least four of the control points.

[0017] Optionally, there are multiple first measuring stations and multiple control network points, and the first measuring stations are located in the area between the object to be measured and the control network points; obtaining the coordinates of the measured points according to the control network point coordinates of the control network points, the first positional relationship, and the second positional relationship includes: using the control network point coordinates of the control network points, the first positional relationship, and the second positional relationship as the input parameters of an adjustment algorithm, and calculating the coordinates of the measured points through the adjustment algorithm.

[0018] Optionally, there are multiple first measuring stations and multiple control network points, and the first measuring stations are located in the area between the object to be measured and the control network points; obtaining the coordinates of the measured points according to the control network point coordinates of the control network points, the first positional relationship, and the second positional relationship includes: for each first total station deployed at the first measuring station, obtaining the initial coordinates of the measured points that are visible to the first total station according to the control network point coordinates of the control network points, the first positional relationship between the first total station and the control network points, and the second positional relationship between the first total station and the measured points that are visible to the first total station.

[0019] For each measured point, averaging the initial coordinates of the measured points obtained from each first total station that is visible to the measured point to obtain the coordinates of the measured point.

[0020] In a second aspect, an embodiment of the present application provides a precise photogrammetric control measurement device, including: a first acquisition module, configured to acquire the control network point coordinates of multiple control network points deployed in the surrounding area of the object to be measured; multiple measured points are provided on the object to be measured; a second acquisition module, configured to acquire the first positional relationship between the first total station and the control network points and acquire the second positional relationship between the first total station and the measured points through the first total station installed at the first measuring station; the first positional relationship includes the first distance, the first horizontal angle, and the first zenith distance between the first total station and the control network points, and the second positional relationship includes the second distance, the second horizontal angle, and the second zenith distance between the first total station and the measured points; a third acquisition module, configured to acquire the coordinates of the measured points according to the control network point coordinates of the control network points, the first positional relationship, and the second positional relationship, and determine the contour of the object to be measured according to the coordinates of the measured points.

[0021] In a third aspect, an embodiment of the present application provides a precise photogrammetric control measurement system, including: a control point coordinate acquisition module, configured to acquire the control point coordinates of a plurality of control points arranged in the surrounding area of the object to be measured; a plurality of measured points are arranged on the object to be measured; a first total station instrument installed at a first measuring station, configured to acquire the first positional relationship between the first total station instrument and the control points, and acquire the second positional relationship between the first total station instrument and the measured points; the first positional relationship includes the first distance, the first horizontal angle, and the first zenith distance between the first total station instrument and the control points, and the second positional relationship includes the second distance, the second horizontal angle, and the second zenith distance between the first total station instrument and the measured points; a measured point coordinate acquisition module, configured to acquire the measured point coordinates of the measured points according to the control point coordinates of the control points, the first positional relationship, and the second positional relationship, and determine the contour of the object to be measured according to the measured point coordinates.

[0022] In a fourth aspect, an embodiment of the present application further provides an electronic device, including a processor; a memory for storing instructions executable by the processor; wherein, the processor is configured to execute the instructions to implement the method of the first aspect.

[0023] In a fifth aspect, an embodiment of the present application further provides a computer-readable storage medium, when the instructions in the computer-readable storage medium are executed by the processor of the electronic device, enabling the electronic device to execute the method of the first aspect.

[0024] In this embodiment, the control point coordinates of a plurality of control points arranged in the surrounding area of the object to be measured are acquired; a plurality of measured points are arranged on the object to be measured; through the first total station instrument installed at the first measuring station, the first positional relationship between the first total station instrument and the control points is acquired, and the second positional relationship between the first total station instrument and the measured points is acquired; the first positional relationship includes the first distance, the first horizontal angle, and the first zenith distance between the first total station instrument and the control points, and the second positional relationship includes the second distance, the second horizontal angle, and the second zenith distance between the first total station instrument and the measured points; according to the control point coordinates of the control points, the first positional relationship, and the second positional relationship, the measured point coordinates of the measured points are acquired, and the contour of the object to be measured is determined according to the measured point coordinates. Through the control points and the first total station instrument at the first measuring station, the measured point coordinates of a plurality of measured points on the object to be measured can be acquired. The method is simple and can achieve precise photogrammetric control measurement of the object to be measured, avoiding the problem in the related art that the contour of the object to be measured cannot be simply and accurately acquired.

[0025] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features, and advantages of this application more obvious and understandable, the following specifically illustrates the specific implementation manners of this application. Description of the Drawings

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0027] Figure 1 It is a flowchart of the steps of a precise photogrammetric control measurement method provided by an embodiment of this application;

[0028] Figure 2 It is a schematic diagram of the application scenario of a precise photogrammetric control measurement method provided by an embodiment of this application;

[0029] Figure 3 It is a flowchart of the steps of a precise photogrammetric control measurement method provided by an embodiment of this application;

[0030] Figure 4 It is a schematic diagram of the application scenario of a precise photogrammetric control measurement method provided by an embodiment of this application;

[0031] Figure 5 It is a flowchart of the steps of a method for obtaining control point coordinates provided by an embodiment of this application;

[0032] Figure 6 It is a schematic diagram of the application scenario of a precise photogrammetric control measurement method provided by an embodiment of this application;

[0033] Figure 7 It is a schematic diagram of the positional relationship between a total station and a prism provided by an embodiment of this application;

[0034] Figure 8 It is a schematic diagram of the positional relationship between a total station and a prism provided by an embodiment of this application;

[0035] Figure 9 It is a flowchart of the steps of a precise photogrammetric control measurement method provided by an embodiment of this application;

[0036] Figure 10 It is a structural block diagram of a precise photogrammetric control measurement device provided by an embodiment of this application;

[0037] Figure 11It is a structural block diagram of a precision photography control measurement system provided by an embodiment of the present application;

[0038] Figure 12 It is a block diagram of an electronic device provided by an embodiment of the present invention;

[0039] Figure 13 It is a block diagram of another electronic device according to another embodiment of the present invention. Detailed implementation manners

[0040] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0041] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are usually of the same category, and the number of objects is not limited. For example, the first object can be one or more. In addition, the terms and / or in the specification and claims are used to describe the association relationship between associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. The character / generally indicates that the associated objects before and after are in an "or" relationship. In the embodiments of the present application, the term "a plurality" means two or more, and other quantifiers are similar.

[0042] Figure 1 It is a precision photography control measurement method provided by an embodiment of the present application. Referring to Figure 1 , the method may include the following steps:

[0043] Step 101, obtain the control point coordinates of a plurality of control points arranged in the surrounding area of the object to be measured.

[0044] Among them, a plurality of measured points are provided on the object to be measured.

[0045] Exemplarily, the method of this embodiment can be used to obtain the relative coordinates of the measured points. Correspondingly, the control points in this step are relative control points. The number of control points is preferably 8. For example, referring to Figure 2 , the control points include to TP08, a total of 8 control points.

[0046] Among them, the measured points in this step are equivalent to the photo control points in the surveying and mapping field. A control network for obtaining the coordinates of the measured points of the measured object is formed by multiple control network points arranged in the surrounding area of the measured object. Among them, the number of control network points can be adjusted according to the actual observation scenario. Specifically, the number of control network points can be increased or decreased according to the visibility conditions at the observation site. Specifically, in the case of relatively good visibility conditions, the number of control network points can be reduced, and in the case of relatively poor visibility conditions, the number of control network points can be increased.

[0047] For example, a tripod prism is installed at the control network point, and the control network point can be arranged on a hard ground. Thus, it is not easy to have subsidence displacement when installing the tripod, which can ensure the accuracy of the measurement results. The control network points can be arranged in an area with relatively few electromagnetic devices with strong electromagnetic radiation around. In other words, there are not likely to be strong electromagnetic devices around the arranged control network points to avoid the influence of electromagnetic devices on the measurement accuracy.

[0048] For example, the method of this embodiment can be used to obtain the absolute coordinates of the measured points. Correspondingly, the control network points in this step are absolute control network points. At least 4 forced centering observation piers need to be built for each absolute control network point. In addition, at least four tripod prism control network points are arranged, and the known coordinates are introduced to the four control network point observation piers. After introducing the known coordinates to the control network points, the absolute coordinates of the control network points can be obtained through a total station. For example, the absolute coordinates of the control network points in the control network can be observed by using precise triangulation technology.

[0049] For example, the coordinates of each absolute control network point can be obtained through the Global Navigation Satellite System (GNSS) method; among them, the control network point coordinates obtained through GNSS can include the X-axis coordinate and the Y-axis coordinate. Further, the elevation values of each control network point can be obtained through a total station. Thus, by combining GNSS technology and a total station, the three-dimensional coordinates of the control network points can be obtained, and the three-dimensional coordinates include the X-axis coordinate, the Y-axis coordinate, and the elevation value.

[0050] Step 102: Through the first total station installed at the first measuring station, obtain the first positional relationship between the first total station and the control network point, and obtain the second positional relationship between the first total station and the measured point.

[0051] Among them, the first positional relationship includes the first distance, the first horizontal angle, and the first zenith distance between the first total station and the control network point, and the second positional relationship includes the second distance, the second horizontal angle, and the second zenith distance between the first total station and the measured point.

[0052] Further, during the measurement process of this embodiment, when observing the control points on the aerial photo, each first measuring station has line-of-sight communication with at least four control network points. In other words, each first measuring station needs to see four appropriate control network points. Among them, as the number of control network points observed by the first measuring station increases, the measurement accuracy of the photo control points will increase accordingly. However, too many control network points will increase the workload, so the number of control network points should not be too large. Among them, the photo control points are equivalent to the measured points in this embodiment. Therefore, the number of measured points arranged on the measured object can be set according to user requirements. For example, when the user has relatively high requirements for measurement accuracy, the number of measured points can be set to be larger. When the user has relatively high requirements for measurement efficiency, the number of measured points can be set to be smaller.

[0053] Step 103: Obtain the coordinates of the measured points based on the coordinates of the control network points, the first positional relationship, and the second positional relationship, and determine the contour of the measured object according to the coordinates of the measured points.

[0054] Exemplarily, the coordinates of the control network points, the first positional relationship, and the second positional relationship can be used as the input parameters of the adjustment algorithm, and the coordinates of the measured points can be calculated through the adjustment algorithm.

[0055] Exemplarily, the coordinates of the measured points can also be obtained through the triangle analysis method, as well as the coordinates of the control network points, the first positional relationship, and the second positional relationship of the control network points.

[0056] Specifically, based on the coordinates of the control network points and the first positional relationship, obtain the coordinates of the first measuring station, and then based on the coordinates of the first measuring station and the second positional relationship, obtain the coordinates of the measured points.

[0057] Further, according to the following method, obtain the coordinates of the first measuring station: Determine the projected distance of the first distance between the control network point and the first measuring station on the horizontal plane as the sine value of the first distance and the first zenith distance in the first positional relationship. Determine the distance along the X-axis between the control network point and the first measuring station as the product of the projected distance and the sine value of the first horizontal angle in the first positional relationship; Determine the distance along the Y-axis between the control network point and the first measuring station as the product of the projected distance and the cosine value of the first horizontal angle in the first positional relationship; Based on the X-axis coordinate and Y-axis coordinate of the control network point, as well as the distance along the X-axis between the control network point and the first measuring station and the distance along the Y-axis between the control network point and the first measuring station, obtain the X-axis coordinate and Y-axis coordinate of the first measuring station.

[0058] According to the following method, obtain the coordinates of the measured point: Determine the projected distance of the second distance between the measured point and the first measuring station on the horizontal plane by using the sine value of the second distance and the second zenith distance in the second position relationship. Determine the distance along the X-axis between the measured point and the first measuring station by using the projected distance and the sine value of the second horizontal angle in the second position relationship; Determine the distance along the Y-axis between the measured point and the first measuring station by using the projected distance and the cosine value of the second horizontal angle in the second position relationship; According to the X-axis coordinate and Y-axis coordinate of the first measuring station, as well as the distance along the X-axis between the measured point and the first measuring station and the distance along the Y-axis between the measured point and the first measuring station, obtain the X-axis coordinate and Y-axis coordinate of the measured point.

[0059] Furthermore, use the first total station to measure the elevation value of the measured point. Thus, based on the method of this embodiment, the coordinates of the measured point can be accurately obtained, and the coordinates of the measured point specifically include the X-axis coordinate, Y-axis coordinate, and elevation value of the measured point.

[0060] Exemplarily, the measured point is used to reflect the contour of the measured object. After obtaining the coordinates of the measured point, the contour of the measured object can be generated by using mapping software. For example, if the interface of the measured object is rectangular, the measured points can be set as the corner points of the end face of the rectangular object and the corner points between the end faces. After obtaining the coordinates of the measured point, the contour of the measured object can be obtained according to the connection of the corner points; Another example is that if the measured object is cylindrical, the measured points can be set as the points on the end face of the measured object and the points between the two end faces; According to the points on the end face, the contour of the end face of the measured object can be determined, and according to the points between the end faces, the contour of the cross section where the points between the end faces are located can be determined.

[0061] Furthermore, after obtaining the contour of the measured object based on the method of this embodiment, it is possible to determine whether the measured object is deformed according to the obtained contour, and then determine whether the measured object meets the quality requirements according to the judgment result of whether there is deformation; Specifically, if it is deformed, it is determined that the measured object does not meet the quality requirements, and if it is not deformed, it is determined that the measured object meets the quality requirements. Thus, based on the method of this embodiment, quality inspection can be performed on the measured object, especially the measured object with a large size.

[0062] For example, if the measured object needs to meet the quality requirement that the cross section is rectangular, and it is determined that the end face or the cross section between the end faces of the measured object is not rectangular according to the coordinates of the measured point, it is determined that the measured object does not meet the quality requirements; Another example is that if the measured object needs to meet the quality requirement that the cross section is circular, and it is determined that the end face or the cross section between the end faces is not circular according to the coordinates of the measured point, it is determined that the measured object does not meet the quality requirements.

[0063] The precise photogrammetric control measurement technology of this embodiment can be applied to fields such as high-level precision and high-reliability quality measurement. It is particularly suitable for the processing, manufacturing, installation measurement, and quality inspection of large and complex-shaped devices (such as metal structures) in the field of precision engineering.

[0064] Photogrammetric control measurement technology is a non-contact measurement technology. By taking relative photos of the object to be measured, a stereo model is established and manual or intelligent image matching and interpretation are carried out, and the precise spatial dimensions or three-dimensional coordinates of the object to be measured are calculated and measured. The technical method of photogrammetric measurement for large metal structure devices or large structure devices of other materials belongs to the category of precise photogrammetric technology. Among them, high-precision photo control points need to be set up during precise photogrammetric measurement. The higher the accuracy of the photo control points, the higher the accuracy of the photo control point coordinates obtained by the precise photogrammetric control measurement method, or the dimensions of the object to be measured obtained based on the photo control point coordinates. Therefore, it is very necessary to study a precise photogrammetric control measurement technology method. In this embodiment, the measured points of the object to be measured are the photo control points for coordinate measurement.

[0065] Furthermore, the precise photogrammetric control measurement technology method of this embodiment can be divided into two types: absolute control measurement and relative control measurement. Among them, when performing absolute control measurement, forced centering observation piers need to be set up, while relative control measurement does not require setting up forced centering observation piers, and only the temporary control network points in the previous steps need to be set up. For example, referring to Figure 2 , relative control network points as shown in to TP08 can be set up. Furthermore, a tripod prism is installed at the control network points. At least four forced centering observation piers need to be set up for the control network points arranged in the absolute control measurement, and the remaining control network points are arranged in the way of tripod prisms. Specifically, referring to Figure 2 , forced centering observation piers can be set up at the control network points , 3, 5, 7, and tripod prisms can be set up at the control network points , 4, 6, 8.

[0066] In this embodiment, the control point coordinates of multiple control points arranged around the object to be measured are obtained. Through the first total station instrument set up at the first measurement station, the first positional relationship between the first total station instrument and the control points is obtained, and the second positional relationship between the first total station instrument and the measured point is obtained. The first positional relationship includes the first distance, the first horizontal angle, and the first zenith distance between the first total station instrument and the control points, and the second positional relationship includes the second distance, the second horizontal angle, and the second zenith distance between the first total station instrument and the measured point. According to the control point coordinates of the control points, the first positional relationship, and the second positional relationship, the measured point coordinates of the measured point on the object to be measured are obtained, and the contour of the object to be measured is determined according to the measured point coordinates. Through the control points and the first total station instrument at the first measurement station, the measured point coordinates of multiple measured points on the object to be measured can be obtained. The method is simple and can achieve precise photogrammetric control measurement of the object to be measured, avoiding the problem in the related art that the contour of the object to be measured cannot be simply and accurately obtained.

[0067] Based on the method of this embodiment, it is not necessary to ensure that there is line of sight or no obstacle between different measured points, which can avoid the problem in the related art that when measuring by pulling a ruler between two points on the object to be measured, accurate measurement cannot be performed due to obstacles between the two points.

[0068] In addition, based on the method of measuring by pulling a ruler in the related art, only the contour of the end face of the object to be measured can be detected, and the cross-sectional contour between the end faces of the object to be measured cannot be detected. However, based on this embodiment, based on the first total station instrument at the first measurement station and the control point coordinates, the measured point coordinates can be obtained without ensuring that there is line of sight between the measured points. Therefore, based on this embodiment, the cross-sectional contour between the end faces of the object to be measured can also be detected, improving the accuracy of the contour quality detection of the object to be measured and solving the problem in the related art that the cross-sectional contour between the end faces cannot be detected.

[0069] Figure 3 is a step flowchart of a precise photogrammetric control measurement method provided by an embodiment of the present application. As Figure 3 shown, the method may include:

[0070] Step 201: Through the second total station instrument set up at the second measurement station, obtain the third positional relationship between the second total station instrument and the control points.

[0071] Among them, the third positional relationship includes the third distance, the third horizontal angle, and the third zenith distance between the second total station instrument and the control points.

[0072] Exemplarily, there are multiple second measurement stations and multiple control points, and the second measurement stations are located in the area between the object to be measured and the control points. Step 201 may include the following sub-steps:

[0073] Sub-step A1: For each second total station instrument set up at the second survey station, in a clockwise or counterclockwise direction, sequentially measure the third positional relationship between the second total station instrument and each control network point that is visible from the second total station instrument.

[0074] Refer to Figure 2 , the second survey station may include a total of 4 survey stations from Y11 to Y14. Among them, a second total station instrument is set up at each second survey station. The second survey station is used to construct a control network to obtain the coordinates of each control network point in the control network, and the first survey station is used to obtain the coordinates of the measured points. Further, the first survey station may include Figure 4 the 8 survey stations shown in Figure 4 . Specifically, refer to

[0075] By way of example, sub-step A1 may include the following sub-steps:

[0076] Sub-step A11: For each second total station instrument set up at the second survey station, from the control network points that are visible from the second total station instrument, obtain the first target control network point corresponding to the second total station instrument.

[0077] Among them, the control network points at least include the control network points at the four first corner points in the surrounding area of the measured object; the second survey stations at least include the second survey stations at the four second corner points in the area between the measured object and the control network points.

[0078] For example, refer to Figure 2 , the control network points at least include TP01, TP03, TP05, and TP07, and the second survey stations at least include Y11, Y12, Y13, and Y14.

[0079] Further, sub-step A11 may include the following sub-steps:

[0080] Sub-step A111: In a clockwise or counterclockwise arrangement direction, respectively determine the four control network points at the four first corner points as the first target control network points that are in one-to-one correspondence with the second survey stations at the four second corner points.

[0081] Among them, at least one control network point is arranged between the control network points at every two adjacent first corner points;

[0082] Each control network point is visible from the second total station instruments at at least three second survey stations.

[0083] For example, refer to Figure 2The control points include control points TP01, TP03, TP05, and TP07 located at the four first corner points of the area around the object to be measured. A control point TP02 is arranged between TP01 and TP03, a control point TP04 is arranged between TP03 and TP05, a control point TP06 is arranged between TP05 and TP07, and a control point TP08 is arranged between TP07 and TP01.

[0084] The second measuring station includes Y11, Y12, Y13 and Y14. Based on this embodiment, TP07, TP01, TP03 and TP05 are respectively determined as the first target control points of Y11, Y12, Y13 and Y14.

[0085] In this embodiment, control points can be arranged according to the measurement site, and at least some of the control points need to have line of sight. The number of control points can be adjusted according to the actual measurement application scenario. For example, under complex terrain conditions, the number of control points can be increased. During observation, each control point must have line of sight with at least three instrument stations (the first measurement station or the second measurement station) to ensure that at least three instrument stations observe each control point.

[0086] When placing control points, at least three sides of the control points must meet the preset side length conditions. In other words, each control point must have at least three sides to be constrained. The side length between TP08 and TP08 must be less than 50m. When the side length between the two is greater than 50m, the number of temporary control points needs to be increased during the control network observation. However, the sight distance cannot exceed 50m during the control network observation to ensure the measurement accuracy. For example, the control measurement uses a total station with a constant detection accuracy of 0.05mm and a prism constant difference of less than 0.1mm.

[0087] Sub-step A12, taking the first target control point as the backsight starting direction of the second total station, and sequentially measuring the third positional relationship between the second total station and each control point in line of sight with the second total station in a clockwise or counterclockwise direction.

[0088] For example, refer to Figure 2 TP07, TP01, TP03, and TP05 are determined as the backsight starting directions of Y11, Y12, Y13, and Y14, respectively.

[0089] Step 202: acquiring the control point coordinates of the control point according to the preset station coordinates of the second station and the third position relationship.

[0090] For example, one of the plurality of second total stations is determined as a target second total station, and the target second total station (for example, Figure 2The second total station at Y11 in the middle) sets the preset station coordinates ( , , ), is the target second total station and its backsight starting direction (for example, Figure 2 TP07 in the ); wherein the starting azimuth is equivalent to the horizontal angle between the second total station of the target and its backsight starting direction. , , They are respectively the X-axis coordinate, Y-axis coordinate, and elevation value of the preset measuring station.

[0091] Furthermore, with the first target control point as the backsight start direction of the second survey station, the second total station of the second survey station is used to sequentially measure the third position relationship between the second total station and each control point in sight with the second total station in a clockwise or counterclockwise direction. Figure 2 Set the preset station coordinates ( , , ), is the target second total station and its backsight starting direction (for example, Figure 2 TP07 in the ), and the third position relationship of each second total station test, to obtain the control network point coordinates of the control network points.

[0092] Further, according to the preset station coordinates of the target second station, the starting azimuth, and the third positional relationship between the target second station and each control point, the initial control point coordinates of each control point are obtained. Then, the next second station of the target second station is determined in a clockwise or counterclockwise direction, and the station coordinates of the next second station are calculated according to the initial control point coordinates of one of the control points and the third positional relationship between the next second station and the control point, and the initial control point coordinates of each control point are calculated according to the station coordinates of the second station and the third positional relationship between other control points.

[0093] After calculating the initial control network point coordinates corresponding to the second total station at each second survey station based on the third positional relationship measured by the second total station at each second survey station, for each control network point, the initial control network point coordinates calculated by the second total station at each second survey station that has line of sight with the control network point are averaged to obtain the network point coordinates of the control network point.

[0094] The following is an example of calculating the point coordinates of the control point according to the station coordinates and horizontal angle of the target second station and the third positional relationship between the target second station and the control point, to illustrate the coordinate conversion method between the second station and the control point: For example, the third distance in the third positional relationship and the sine value of the third zenith distance are determined as the projection distance of the third distance between the control point and the second station on the horizontal plane. The projection distance and the sine value of the third horizontal angle in the third positional relationship are determined as the distance along the X axis between the control point and the second station; the projection distance and the cosine value of the third horizontal angle in the third positional relationship are determined as the distance along the Y axis between the control point and the second station; the X-axis coordinates and Y-axis coordinates of the control point are obtained according to the X-axis coordinates and Y-axis coordinates of the second station, the distance along the X axis between the control point and the second station, and the distance along the Y axis between the control point and the second station. The elevation of the control point is obtained by the total station.

[0095] In other words, in this embodiment, one of the second measuring stations is used as the starting measuring station, and the third positional relationship between each second measuring station and each control grid point is measured in turn along the clockwise or counterclockwise direction, and the grid point coordinates of each control grid point are obtained according to the third positional relationship. Further, a preset coordinate can be set for the starting measuring station, and a preset angle can be set for the starting measuring station and the backsight starting direction of the starting measuring station. For example, referring to Figure 2 , the starting station is Y11, the backsight starting direction of Y11 is TP07, and the X-axis coordinate of Y11 is , the Y-axis coordinate is , the elevation value is H0; the starting azimuth of the Y01 and TP07 directions is .

[0096] For example, step 202 may include the following sub-steps:

[0097] Sub-step B1, using the preset station coordinates of the second station and the third positional relationship as input parameters of an adjustment algorithm, and obtaining the control network point coordinates of the control network point through calculation using the adjustment algorithm.

[0098] For example, the coordinates of the control points may also be obtained by a triangulation analysis method, the specific method of which has been described in the aforementioned step 202 and will not be repeated here.

[0099] For example, there are multiple first measuring stations and multiple control points, and the first measuring stations are located in an area between the measured object and the control points.

[0100] Step 203, for each first total station set up at the first survey station, obtain the first position relationship between the first total station and each control network point that has a line of sight with the first total station in sequence in a clockwise or counterclockwise direction, and obtain the second position relationship between the first total station and the measured point that has a line of sight with the first total station.

[0101] Among them, the first positional relationship includes the first distance, the first horizontal angle, and the first zenith distance between the first total station and the control network point, and the second positional relationship includes the second distance, the second horizontal angle, and the second zenith distance between the first total station and the measured point.

[0102] Exemplarily, step 203 may include the following sub-steps:

[0103] Sub-step C1, for each first total station set up at the first measurement station, obtain the second target control network point corresponding to the first total station from the control network points that are visible to the first total station.

[0104] Exemplarily, the multiple control network points include the control network points at the four first corner points in the surrounding area of the measured object, and there is one control network point set between every two adjacent first corner points; the first measurement station includes at least eight first measurement stations in the area between the measured object and the control network points.

[0105] Among them, the layout position and the number of the measured points as the photo control points can be set according to the requirements of photogrammetry. Exemplarily, a reflective film is used to make the photo control point marks to improve the ranging accuracy. That is, a reflective film is set at the measured point, and the first total station obtains the second positional relationship with the measured point through the signal reflected by the reflective film.

[0106] Furthermore, the shape of the photo control point mark pattern (i.e., the reflective film at the measured point) can be designed according to the photography requirements and the measurement requirements of the first total station. For example, it can be set in the shape of a crosshair, and the thickness of the innermost small crosshair is not greater than 0.1 mm. Furthermore, the crosshair is thin in the center and thickens outward, which is beneficial for the first total station to take images.

[0107] Furthermore, because there are redundant observations to judge the measurement accuracy, the observation of the photo control points needs to intersect with no less than three instrument stations. If it is a two-station intersection, it is observed twice respectively at different measurement stations. Among them, the maximum intersection angle of the photo control point observation is not less than 90 - 120°, and the minimum intersection angle is not less than about 45°.

[0108] Exemplarily, when the measurement accuracy requirement of the measured point is about 1 mm, the method of non-prism ranging is directly used to calculate the coordinates of the measured point. When the measurement accuracy requirement of the measured point is less than 1 mm, the horizontal angle intersection method can be used to calculate the coordinates of the measured point to improve the measurement accuracy of the coordinates of the measured point.

[0109] The precise photogrammetric control measurement technique method of this embodiment is an important guarantee for realizing precise photogrammetry technology, and its main characteristics are high precision level and high reliability. When measuring the coordinates of the measured points based on this embodiment, the relative control measurement accuracy can reach 0.1 mm, and the absolute control measurement accuracy can reach 1 mm, where the measurement accuracy reflects the mean error of each kilometer point position. It should be noted that the reason why the absolute control measurement accuracy is lower than the relative control measurement accuracy is that there are starting point errors and error propagation of the surveying and mapping line in absolute control measurement, while relative control measurement only has prism constant difference and total station observation error.

[0110] For example, during control measurement, a prism with a prism constant difference less than 0.1 mm is used, and the total station additive constant detection error is 0.05 mm. When the longest sight distance of the total station observation is controlled within 50 m, the measurement accuracy of the control network can reach 0.1 mm, and this measurement accuracy reflects the mean error of the control network point position.

[0111] In the case of absolute measurement without considering the influence of starting point errors and error propagation of the surveying and mapping line, etc., precise triangulation technology can be used to observe the control network, and the relative accuracy obtained based on this technology will also reach 0.1 mm. The repeated measurement accuracy of measuring the measured points based on the absolute measurement method is slightly lower than the relative control measurement accuracy, but the relative dimension accuracy of measuring the measured object is the same. The difference is that the measurement accuracy of the absolute coordinate position obtained based on absolute measurement is a bit worse, and the measurement accuracy is about 0.2 mm. The reason for this problem is that there is centering error of the two observation pedestals in absolute measurement.

[0112] For example, multiple said control network points include control network points at four first corner points in the surrounding area of the measured object, and there is a control network point between every two adjacent first corner points; the first measuring station at least includes eight first measuring stations in the area between the measured object and the control network points; further, sub-step C1 may include the following sub-steps:

[0113] Sub-step C11, arrange the eight control network points in a clockwise or counterclockwise direction, and respectively determine them as second target control network points corresponding to the first measuring stations one by one.

[0114] Among them, the first total station at each first measuring station is visible to at least four control network points.

[0115] For example, referring to Figure 4 , there are 8 first measuring stations from Y21 to Y28, and the second measuring station includes There are eight first measuring stations from Y21 to Y28, which are arranged in a clockwise direction. It should be noted that Y22, Y24, Y26 and Y28 are not marked in the figure. Based on the method of this step, the control points TP07 to TP06 are respectively determined as the second target control points of the first measuring stations Y21 to Y28.

[0116] Sub-step C2, taking the second target control point as the backsight starting direction of the first total station, measuring the first position relationship between the first total station and each control point that has a line of sight with the first total station in a clockwise or counterclockwise direction, and measuring the second position relationship between the first total station and each measured point that has a line of sight with the first total station in sequence.

[0117] There are multiple first measuring stations and multiple control network points, and the first measuring station is located in the area between the measured object and the control network point.

[0118] Step 204, using the control grid point coordinates, the first positional relationship and the second positional relationship of the control grid point as input parameters of an adjustment algorithm, and calculating the coordinates of the measured point through the adjustment algorithm.

[0119] In this embodiment, the coordinates of multiple measured points of the measured object can be obtained by controlling the grid points and the first total station of the first measuring station. The method is simple and can realize precise photographic control measurement of the measured object, avoiding the problem in related technologies that the contour of the measured object cannot be simply and accurately obtained.

[0120] For example, there are multiple first measuring stations and multiple control points, and the first measuring station is located in the area between the measured object and the control points; after step 203, the following steps are also included:

[0121] Step 205, for each first total station deployed at the first survey station, the initial measured point coordinates of the measured point in line of sight with the first total station are obtained based on the control network point coordinates of the control network point, the first positional relationship between the first total station and the control network point, and the second positional relationship between the first total station and the measured point in line of sight with the first total station.

[0122] For example, refer to Figure 4 , the first total station Y21, Y22 and Y28 are all in line of sight with the measured point X11, and the initial measured point coordinates of the measured point X11 are obtained according to the first total station Y21, Y22 and Y28, respectively. Among them, Y22 and Y28 are not marked.

[0123] Step 206 , for each measured point, the initial measured point coordinates obtained by each first total station that has line of sight with the measured point are averaged to obtain the measured point coordinates of the measured point.

[0124] For example, the initial measured point coordinates of the measured point X11 are obtained according to the first total station Y21, Y22 and Y28 respectively, and the three initial measured point coordinates are averaged to obtain the measured point coordinates of the measured point X11.

[0125] Further, see Figure 5 The precision photography control measurement method of this embodiment may include the following steps:

[0126] Step S1: deploy There are eight control sites from Y11 to TP08, and four instrument sites from Y11 to Y14.

[0127] The four instrument stations in this step are equivalent to the second measuring station in the aforementioned embodiment.

[0128] For example, refer to Figure 2 , set up eight control points with tripods and prisms around the object to be measured on site To TP08, the instrument sites are arranged with four instrument sites Y11 to Y14. If the object to be measured is large and affects the line of sight, additional instrument sites must be added. Each prism site has at least three instrument observation directions. Among them, the second measuring station where the tripod prism is set is a free-standing virtual site, and the prism is set up with a precision base bracket; the instrument site is a free-standing virtual site.

[0129] Step S2, set the Y11 station coordinates to , , , Y01 to TP07 direction is the starting azimuth .

[0130] Step S3, set up the total station at the Y01 instrument site and level it, input the meteorological parameters into the total station, set up the prisms at Go to TP08 and make it level, and align the prism face with the direction of the total station.

[0131] The total station in this step is the second total station in the aforementioned embodiment, and the instrument site in this step is the second measuring station in the aforementioned embodiment.

[0132] During the measurement, when rotating the prism lens, the prism bracket needs to be kept stationary. Specifically, the bracket and the base are marked or the bracket is fixed.

[0133] Step S4, taking TP07 as the backsight starting direction, observe TP07, TP08, , , TP03, TP04, and TP04 directions to obtain measurement data.

[0134] The measurement data obtained in this step is the third positional relationship in the foregoing embodiments.

[0135] For example, if there is no direct line of sight between Y21 and TP04, TP06, observe five directions.

[0136] Refer to Figure 2 , the measurement data is arranged in order as: the distance between Y11 and the horizontal angle , the zenith distance , the distance between Y11 and the horizontal angle the zenith distance , the distance between Y11 and the horizontal angle , the zenith distance the distance between Y11 and 1, the horizontal angle 1, the zenith distance , the distance between Y11 and the horizontal angle 2, the zenith distance , the distance between Y11 and 3, the horizontal angle the distance between Y11 and 3, the horizontal angle 3, the zenith distance , the distance between Y11 and 4, the horizontal angle 4, the zenith distance 4, the distance between Y11 and 6, the horizontal angle the distance between Y11 and 6, the horizontal angle 6, the zenith distance , the observation at the Y11 station ends.

[0137] Step S5, move the total station to the Y12 instrument station and level it. Input the meteorological parameters into the total station and align the prism face with the total station direction.

[0138] During the test, the support should remain stationary when rotating the prism head.

[0139] Step S6, using as the back sight starting direction, observe the seven directions of TP01, TP02, TP03, TP04, TP05, TP06, TP08 in sequence according to the preset number of measurement rounds to obtain the measurement data.

[0140] Refer to Figure 2 , the obtained measurement data results are arranged in order: the distance between Y12 and the horizontal angle , the zenith distance 1, the zenith distance , Y02 and The distance between 2. Horizontal angle 2. Zenith distance 2, Y02 and The distance between 3. Horizontal angle 3. Zenith distance 3, Y02 and The distance between 4. Horizontal angle 4. Zenith distance 4. Y02 and The distance between 5. Horizontal angle 5. Zenith distance 5.Y02 and The distance between 6 6. Horizontal Angle 6. Zenith distance 6, Y02 and 8 Distance between 8. Horizontal Angle 8. Zenith distance 8. Observation at station Y12 is completed.

[0141] Step S7, move the total station to the Y13 instrument site and level it, input the meteorological parameters into the total station, and align the prism with the direction of the total station.

[0142] During measurement, the holder remains stationary while the prism head is rotated.

[0143] Step S8, taking TP03 as the backsight starting direction, observing seven directions of TP03, TP04, TP05, TP06, TP07, TP08, and TP02 in sequence according to a preset number of measurement rounds to obtain measurement data.

[0144] Reference Figure 2 , the measurement data results are arranged in order: Y13 and The distance between 3 3. Horizontal angle 3. Zenith distance 4, Y13 and The distance between 4 4. Horizontal angle 4. Zenith distance 4, Y13 and The distance between 5. Horizontal angle 5. Zenith distance 5, Y13 and The distance between 6 6. Horizontal Angle 6. Zenith distance 6, Y13 and 7 The distance between 7. Horizontal Angle 7. Zenith distance 7, Y13 and 8 Distance between 8. Horizontal Angle 8. Zenith distance 8, Y13 and The distance between 2 2. Horizontal angle 2. Zenith distance 2. Observation at station Y13 is completed.

[0145] Step S9, move the total station to the Y14 instrument site and level it, input the meteorological parameters into the total station, and align the prism with the direction of the total station.

[0146] During measurement, the holder remains stationary while the prism head is rotated.

[0147] Step S10, taking TP05 as the backsight starting direction, observe TP05, TP06, TP07, TP08, , TP02, and TP04 to obtain measurement data.

[0148] Reference Figure 2 , the measurement data results are arranged in order: Y14 and The distance between 5 5. Horizontal angle 5. Zenith distance 5, Y14 and The distance between 6 6. Horizontal Angle 6. Zenith distance 6, Y14 and 7 The distance between 7. Horizontal Angle 7. Zenith distance 7, Y14 and 8 Distance between 8. Horizontal Angle 8. Zenith distance 8, Y14 and The distance between 1 1. Horizontal angle 1. Zenith distance 1, Y14 and The distance between 2 2. Horizontal angle 2. Zenith distance 2, Y14 and Distance between 4 4, Horizontal angle 4, Zenith distance 4, Observation at Station Y14 ended.

[0149] Step S11: After processing the observation data, conduct a measurement accuracy analysis on the observation data. If the measurement accuracy is unqualified, retest; if the accuracy is qualified, conduct photo control point observations.

[0150] The photo control points are the measured points in the foregoing embodiments.

[0151] The method for calculating the network point coordinates of the control network is as follows: When calculating the relative control coordinates (i.e., relative network point coordinates), the method of setting the coordinate origin is used for calculation. For example, set the Y01 coordinate as , , , with the back sight direction of TP07 as the azimuth , and conduct adjustment calculations through one point and one direction to obtain the network point coordinates. Further, evaluate and analyze the measurement accuracy of the control network based on the point position error obtained from the adjustment calculations.

[0152] When calculating the absolute control coordinates (i.e., absolute network point coordinates), use precise three-dimensional coordinate transfer measurement technology or precise traverse measurement technology for the known coordinates, and transfer them from the known starting point to the control network points. And use the coordinates of multiple known points introduced in the first adjustment calculation for constrained adjustment, and take one point and one direction for adjustment coordinates in the second adjustment calculation to eliminate the errors propagated within the network. Among them, select one point and one direction as the longer side.

[0153] Further, multiple absolute control network points can include four tripod prism control network points. Among them, the known coordinates use high-grade control network points at the engineering construction site. For example, at least three suitable known points can be selected, and according to the actual observation scenario, use precise satellite positioning measurement technology, precise three-dimensional coordinate transfer measurement technology, precise traverse measurement, etc. for introduction; while for underground chamber introduction, precise three-dimensional coordinate transfer measurement technology or precise traverse measurement technology can be used for ground introduction to transfer the known coordinates to the control network points.

[0154] Refer to Figure 7 , the distance between Y11 and TP07 is S107, then the projected distance of the distance between Y01 and TP07 in the XY plane 07 is 07×COS(90° - β107). The coordinates of Y01 are ( , , ), refer to Figure 8, in the XY plane, the distance along the X-axis between Y01 and TP07 is 07×COS(90° - ɑ107), and the distance along the Y-axis between Y11 and TP07 is 07×sin(90° - ɑ107), then the X-axis coordinate of TP07 is X0 + 07×COS(90° - ɑ107), and the Y-axis coordinate is Y0 + 07×sin(90° - ɑ107). Further, the elevation H of TP07 can be measured by a total station.

[0155] Further, referring to Figure 9 , the method for obtaining the coordinates of the measured points of the object to be measured may include the following steps:

[0156] Step F1, arrange a total of 24 photo control points from X11 to X83 on the surface of the object to be measured, and arrange a total of 8 instrument stations from Y21 to Y28.

[0157] The photo control point marks are the measured points in the foregoing embodiments. The instrument station points in this step are the first measuring stations in the foregoing embodiments.

[0158] Referring to Figure 6 , the photo control point marks include a total of 24, namely X11, X12, XI3 to X81, X82, X83. It should be noted that the photo control point marks X41, X42, X43, X21, X23, X61 and X81 are marked in the figure, and the others are not. In addition, Figure 6 the schematic connection lines of the measured points measured by the instrument at Y21 are marked, and the schematic connection lines of other total stations and measured points are not marked or only part of them are marked.

[0159] In this embodiment, during the actual measurement process, the number of arranged photo control points can be increased or decreased according to needs. Referring to Figure 6 , the arranged instrument stations include a total of 8 from Y21 to Y28. Among them, when observing the photo control point marks, the distance measurement is carried out in a prism-free manner. The calculated results of the coordinates of the measured points obtained thereby are only for reference, and the actual coordinates of the measured points are obtained by adjusting the observations using angles. For example, for photo control points with a vertical pitch angle exceeding 10 degrees, after calculating the horizontal distance by inverse calculation of the coordinates obtained by the intersection method, the height difference and elevation can be calculated. For photo control points with a vertical pitch angle within 10 degrees, the height difference and elevation can be directly calculated using the prism-free distance measurement method.

[0160] Step F2, set up the total station on the instrument station at Y21 and level it, input the meteorological parameters into the total station, and align the prism observation surface with the direction of the total station.

[0161] The total station in this step is the first total station in the above-mentioned embodiment. During the test, the bracket remains stationary when the prism lens is rotated.

[0162] Step F3, taking TP07 as the backsight starting direction, observe TP07, TP08, , TP02, TP03, X81, X82, X83, X11, X12, X13, X21, X22, X23, obtain measurement data.

[0163] For example, the number of control points to be observed is not less than 4. The measurement data in this step includes the first position relationship and the second position relationship in the above-mentioned embodiment.

[0164] Reference Figure 6 , the measurement data results are arranged in the following order: Y21 and 7 The distance between 7. Horizontal Angle 7. Zenith distance 7, Y21 and The distance between , horizontal angle , Zenith distance , Y21 and The distance between 1. Horizontal angle 1. Zenith distance 1, Y21 and The distance between 2. Horizontal angle , Zenith distance 2, Y21 and The distance between 3 3. Horizontal angle 3. Zenith distance 3. Distance between Y21 and X81 , horizontal angle , Zenith distance , the distance between Y21 and X82 , horizontal angle , Zenith distance , the distance between Y21 and X83 , horizontal angle , Zenith distance , the distance between Y21 and X11 , horizontal angle , Zenith distance , the distance between Y21 and X12 , horizontal angle , Zenith distance , the distance between Y21 and X13 , horizontal angle , Zenith distance , the distance between Y21 and X21 , horizontal angle X21, Zenith distance Distance between X21, Y21 and X22 X22, horizontal angle X22, Zenith distance Distance between X22, Y21 and X23 X23, horizontal angle X23, Zenith distance X23, the measurement of the image control points of the Y21 station is completed.

[0165] Step F4, move the total station and set it up on the Y22 instrument site, input the meteorological parameters into the total station, and align the prism observation surface with the direction of the total station.

[0166] Step F5, take TP08 as the backsight starting direction, and observe TP08, , TP02, TP03, TP04, X11, X12, X13, X21, X22, X23, X31, X32, X23, obtain measurement data.

[0167] Reference Figure 6 , the measurement data results are arranged in the following order: Y22 and 8 Distance between 8. Horizontal Angle 8. Zenith distance 8, Y22 and The distance between 1 1. Horizontal angle 1. Zenith distance 1, Y22 and The distance between 2 2. Horizontal angle 2. Zenith distance 2, Y22 and The distance between 3 3. Horizontal angle 3. Zenith distance 3, Y22 and The distance between 4 4. Horizontal angle 4. Zenith distance 4.

[0168] The distance between Y22 and X11 X11, horizontal angle X11, Zenith distance Distance between X11, Y22 and X12 X12, horizontal angle X12, Zenith distance Distance between X12, Y22 and X13 X13, horizontal angle X13, Zenith distance Distance between X13, Y22 and X21 X21, horizontal angle X21, Zenith distance Distance between X21, Y22 and X22 X22, horizontal angle X22, Zenith distance Distance between X22, Y22 and X23 X23, horizontal angle X23, Zenith distance Distance between X23, Y22 and X31 X31, horizontal angle X31, Zenith distance Distance between X31, Y22 and X32 X32, horizontal angle X32, Zenith distance Distance between X32, Y22 and X33 X33, horizontal angle X33, Zenith distance X33, thus, the image control point measurement of station Y22 is completed.

[0169] Step F6, move the total station and set it up on the Y23 instrument site, input the meteorological parameters into the total station, and align the prism observation surface with the direction of the total station.

[0170] During measurement, the bracket remains stationary while the prism head is rotated.

[0171] Step F7, with The starting direction of the backsight is the preset number of rounds of observation. , TP02, TP03, TP04, TP05, X21, X22, X23, X31, X32, X33, X41, X42, X43, obtain measurement data.

[0172] Referring to the figure, the measurement data results are arranged in order: Y23 and The distance between 1 1. Horizontal angle 1. Zenith distance 8, Y23 and The distance between 2 2. Horizontal angle 2. Zenith distance 2, Y23 and the distance between 3 3. Horizontal angle 3. Zenith distance 3, Y23 and the distance between 4 4. Horizontal angle 4. Zenith distance 4, Y23 and the distance between 5 5. Horizontal angle 5. Zenith distance the distance between 5, Y23 and X21 X21, Horizontal angle X21, Zenith distance the distance between X21, Y23 and X22 X22, Horizontal angle X22, Zenith distance the distance between X22, Y23 and X23 X23, Horizontal angle X23, Zenith distance the distance between X23, Y23 and X31 X31, Horizontal angle X31, Zenith distance the distance between X31, Y23 and X32 X32, Horizontal angle X32, Zenith distance the distance between X32, Y23 and X33 X33, Horizontal angle X33, Zenith distance the distance between X33, Y23 and X41 X41, Horizontal angle X41, Zenith distance the distance between X41, Y23 and X42 X42, Horizontal angle X42, Zenith distance the distance between X42, Y23 and X23 X43, Horizontal angle X43, Zenith distance Measurement of the photo control points at station Y23 of X43 is completed.

[0173] Step F8: Observe the instrument stations from Y24 to Y08 in sequence to obtain measurement data.

[0174] Observe the instrument stations Y24 to Y08 in sequence according to the above steps to obtain measurement data.

[0175] Refer to Figure 6 , the measurement data results are arranged in sequence as follows: the distance between Y24 and 2 2, horizontal angle 2, zenith distance 2, the distance between Y24 and 3 3, horizontal angle 3, zenith distance 3, the distance between Y24 and 4 4, horizontal angle 4, zenith distance 4, the distance between Y24 and 5 5, horizontal angle 5, zenith distance 5, the distance between Y24 and 6 6, horizontal angle , zenith distance 6, the distance between Y24 and X31 X31, horizontal angle X31, zenith distance X31, the distance between Y24 and X32 X32, horizontal angle X32, zenith distance X32, the distance between Y24 and X33 X33, horizontal angle X33, zenith distance X33, the distance between Y24 and X41 X41, horizontal angle X41, zenith distance X41, the distance between Y24 and X42 X42, horizontal angle X42, zenith distance X42, the distance between Y24 and X43 X43, horizontal angle X43, zenith distance X43, the distance between Y24 and X51 X51, horizontal angle X51, zenith distance X51, the distance between Y24 and X52 X52, horizontal angle X52, zenith distance The distance between X52, Y24 and X53 X53, horizontal angle X53, zenith distance For X53, the measurement of the photo control point at station Y24 is completed.

[0176] After obtaining the distances, horizontal angles, and zenith distances between Y28 and each measured point, and referring to the above method, the distances, horizontal angles, and zenith distances between Y25, Y26, Y27 to Y28 and each measured point are obtained in sequence. After obtaining the distances, horizontal angles, and zenith distances between all the first measuring stations and each measured point, the measurement is completed.

[0177] Furthermore, referring to Figure 6 , the measurement data results of the photo control points at station Y08 are arranged in order as follows: the distance between Y28 and 6 6, horizontal angle 6, zenith distance 6, the distance between Y28 and 7 7, horizontal angle 7, zenith distance 7, the distance between Y28 and 8 8, horizontal angle 8, zenith distance 8, the distance between Y28 and 1 1, horizontal angle 1, zenith distance 1, the distance between Y28 and 2 2, horizontal angle , zenith distance 2, the distance between Y28 and X71 X71, horizontal angle X71, zenith distance X71, the distance between Y28 and X72 X72, horizontal angle X72, zenith distance X72, the distance between Y28 and X73 X73, horizontal angle X73, zenith distance X73, the distance between Y28 and X81 X81, horizontal angle X81, zenith distance X81, the distance between Y28 and X82 X82, horizontal angle X82, zenith distance The distance between X82, Y28 and X83 X83, horizontal angle X83, zenith distance The distance between X83, Y28 and X11 X11, horizontal angle X11, zenith distance The distance between X11, Y28 and X12 X12, horizontal angle X12, zenith distance The distance between X12, Y28 and X13 X13, horizontal angle X13, zenith distance Measurement of the photo control points at station Y28 for X13 is completed.

[0178] Step F9, using to TP08 as known points and the measured points X11 to X83 as unknown points, the coordinates of the measured points X11 to X83 are calculated using the adjustment method.

[0179] After the observation of the photo control points is completed, the data is processed and adjusted. During the calculation process, the known points are to TP08, and the unknown points to be determined are X11, X12, X13 to X81, X82, X83. For example, the constrained adjustment calculation method can be used to calculate the coordinates of the points to be determined. Two sets of results are calculated. One is the result with the distance measurement during the observation of the photo control points. If the accuracy requirement is within 1 mm, this set of results can be directly used. The other set excludes the observed distances of the photo control points and uses the observed angles for adjustment calculation to obtain higher accuracy of the coordinates of the photo control points;

[0180] Furthermore, for the accuracy assessment of the photo control point measurement, the mean square error of the point position after adjustment calculation is used to assess the accuracy of the photo control point measurement.

[0181] Reference Figure 10, which shows a precision photographic control measurement device provided by an embodiment of the present application, the device 30 includes: a first acquisition module 301, used to obtain the control grid point coordinates of multiple control grid points arranged in the surrounding area of ​​the measured object; multiple measured points are arranged on the measured object; a second acquisition module 302, used to obtain a first position relationship between the first total station and the control grid point, and obtain a second position relationship between the first total station and the measured point through a first total station set up at a first measuring station; the first position relationship includes a first distance, a first horizontal angle and a first vertical distance between the first total station and the control grid point, and the second position relationship includes a second distance, a second horizontal angle and a second vertical distance between the first total station and the measured point; a third acquisition module 303, used to obtain the measured point coordinates of the measured point according to the control grid point coordinates of the control grid point, the first position relationship and the second position relationship, and determine the contour of the measured object according to the measured point coordinates.

[0182] Optionally, the first acquisition module 301 includes: a first acquisition sub-module, used to obtain a third position relationship between the second total station and the control point by setting up a second total station at the second survey station; the third position relationship includes a third distance, a third horizontal angle and a third zenith distance between the second total station and the control point; a second acquisition sub-module, used to obtain the control point coordinates of the control point according to the preset survey station coordinates of the second survey station and the third position relationship.

[0183] Optionally, there are multiple second measuring stations and multiple control points, and the second measuring stations are located in the area between the measured object and the control points; the first acquisition submodule includes: a first acquisition unit, which is used to measure, for each second total station set up at the second measuring station, the third position relationship between the second total station and each control point that has line of sight with the second total station in a clockwise or counterclockwise direction.

[0184] Optionally, the first acquisition unit includes: a first acquisition sub-unit, used to acquire, for each second total station set up at the second survey station, a first target control point corresponding to the second total station from the control points in sight with the second total station; a second acquisition sub-unit, used to use the first target control point as the backsight starting direction of the second total station, and measure the third position relationship between the second total station and each control point in sight with the second total station in a clockwise or counterclockwise direction.

[0185] Optionally, the control points include at least control points located at four first corner points of the area around the measured object; the second measuring stations include at least second measuring stations located at four second corner points of the area between the measured object and the control points; the first acquisition subunit includes: a first acquisition subunit, which is used to determine the four control points located at the four first corner points as first target control points corresponding one-to-one to the second measuring stations located at the four second corner points in a clockwise or counterclockwise arrangement direction.

[0186] Optionally, at least one control point is arranged between every two control points at adjacent first corner points; wherein each control point has line of sight with the second total stations at at least three second survey stations.

[0187] Optionally, the first acquisition submodule includes: a second acquisition unit, configured to use the preset station coordinates of the second station and the third positional relationship as input parameters of an adjustment algorithm, and calculate the control network point coordinates of the control network point through the adjustment algorithm.

[0188] Optionally, there are multiple first survey stations and multiple control points, and the first survey station is located in the area between the measured object and the control points; the second acquisition module 302 includes: a third acquisition sub-module, which is used to obtain, for each first total station set up at the first survey station, a first position relationship between the first total station and each control point that has a line of sight with the first total station in a clockwise or counterclockwise direction, and to obtain a second position relationship between the first total station and the measured point that has a line of sight with the first total station.

[0189] Optionally, the third acquisition submodule includes: a third acquisition unit, used to obtain, for each first total station set up at the first survey station, a second target control point corresponding to the first total station from the control points that are in sight with the first total station; a fourth acquisition unit, used to use the second target control point as the backsight starting direction of the first total station, and measure in a clockwise or counterclockwise direction, in sequence, a first position relationship between the first total station and each control point that is in sight with the first total station, and measure in sequence the second position relationship between the first total station and each measured point that is in sight with the first total station.

[0190] Optionally, the multiple control points include control points located at four first corner points of the area around the measured object, and one control point is arranged between every two adjacent first corner points; the first measuring station includes at least eight first measuring stations located in the area between the measured object and the control points; the third acquisition unit includes: a third acquisition sub-unit, which is used to determine the eight control points as second target control points corresponding to the first measuring stations in a clockwise or counterclockwise arrangement direction.

[0191] Optionally, the first total station at each first survey station has line of sight with at least four control points.

[0192] Optionally, there are multiple first survey stations and multiple control network points, and the first survey stations are located in the area between the object to be measured and the control network points; the third acquisition module 303 includes: a fourth acquisition sub-module, configured to use the control network point coordinates, the first position relationship, and the second position relationship of the control network points as the input parameters of the adjustment algorithm, and calculate the coordinates of the measured points through the adjustment algorithm.

[0193] Optionally, there are multiple first survey stations and multiple control network points, and the first survey stations are located in the area between the object to be measured and the control network points; the third acquisition module 303 includes: a fifth acquisition sub-module, configured to, for each first total station instrument deployed at the first survey station, obtain the initial measured point coordinates of the measured points visible to the first total station instrument according to the control network point coordinates of the control network points, the first position relationship between the first total station instrument and the control network points, and the second position relationship between the first total station instrument and the measured points visible to the first total station instrument;

[0194] a sixth acquisition sub-module, configured to, for each measured point, average the initial measured point coordinates obtained from each first total station instrument visible to the measured point to obtain the measured point coordinates of the measured point.

[0195] In this embodiment, the control network point coordinates of multiple control network points deployed in the surrounding area of the object to be measured are obtained; multiple measured points are provided on the object to be measured; through the first total station instrument installed at the first survey station, the first position relationship between the first total station instrument and the control network points is obtained, and the second position relationship between the first total station instrument and the measured points is obtained; the first position relationship includes the first distance, the first horizontal angle, and the first zenith distance between the first total station instrument and the control network points, and the second position relationship includes the second distance, the second horizontal angle, and the second zenith distance between the first total station instrument and the measured points; according to the control network point coordinates, the first position relationship, and the second position relationship of the control network points, the measured point coordinates of the measured points are obtained, and the contour of the object to be measured is determined according to the measured point coordinates. Through the control network points and the first total station instrument at the first survey station, the measured point coordinates of multiple measured points of the object to be measured can be obtained. The method is simple and can achieve precise photogrammetric control measurement of the object to be measured, avoiding the problem in the related art that the contour of the object to be measured cannot be simply and accurately obtained.

[0196] Figure 11It shows a precise photogrammetric control measurement system provided by an embodiment of the present application. The system 40 includes: a control network point coordinate acquisition module 401, configured to acquire the control network point coordinates of a plurality of control network points arranged in the surrounding area of the object to be measured; a plurality of measured points are provided on the object to be measured; a first total station 402 installed at a first measurement station, configured to acquire the first positional relationship between the first total station and the control network points, and acquire the second positional relationship between the first total station and the measured points; the first positional relationship includes the first distance, the first horizontal angle, and the first zenith distance between the first total station and the control network points, and the second positional relationship includes the second distance, the second horizontal angle, and the second zenith distance between the first total station and the measured points; a measured point coordinate acquisition module 403, configured to acquire the measured point coordinates of the measured points according to the control network point coordinates of the control network points, the first positional relationship, and the second positional relationship, and determine the contour of the object to be measured according to the measured point coordinates.

[0197] In this embodiment, the control network point coordinates of a plurality of control network points arranged in the surrounding area of the object to be measured are acquired; a plurality of measured points are provided on the object to be measured; by using the first total station installed at the first measurement station, the first positional relationship between the first total station and the control network points is acquired, and the second positional relationship between the first total station and the measured points is acquired; the first positional relationship includes the first distance, the first horizontal angle, and the first zenith distance between the first total station and the control network points, and the second positional relationship includes the second distance, the second horizontal angle, and the second zenith distance between the first total station and the measured points; according to the control network point coordinates of the control network points, the first positional relationship, and the second positional relationship, the measured point coordinates of the measured points are acquired, and the contour of the object to be measured is determined according to the measured point coordinates. By using the control network points and the first total station at the first measurement station, the measured point coordinates of a plurality of measured points on the object to be measured can be acquired. The method is simple and can achieve precise photogrammetric control measurement of the object to be measured, avoiding the problem in the related art that the contour of the object to be measured cannot be simply and accurately acquired.

[0198] Figure 12 It is a block diagram of an electronic device 500 shown according to an exemplary embodiment. For example, the electronic device 500 can be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, etc.

[0199] Refer to Figure 12 , the electronic device 500 may include one or more of the following components: a processing component 502, a memory 505, a power supply component 506, a multimedia component 508, an audio component 510, an input / output (I / O) interface 512, a sensor component 514, and a communication component 516.

[0200] The processing component 502 generally controls the overall operation of the electronic device 500, such as operations associated with display, telephone calls, data communication, camera operations, and recording operations. The processing component 502 may include one or more processors 520 to execute instructions to complete all or part of the steps of the above methods. In addition, the processing component 502 may include one or more modules to facilitate the interaction between the processing component 502 and other components. For example, the processing component 502 may include a multimedia module to facilitate the interaction between the multimedia component 508 and the processing component 502.

[0201] The memory 505 is used to store various types of data to support the operation of the electronic device 500. Examples of such data include instructions for any application or method operating on the electronic device 500, contact data, phone book data, messages, pictures, multimedia, etc. The memory 505 may be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk, or optical disk.

[0202] The power component 506 provides power to various components of the electronic device 500. The power component 506 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the electronic device 500.

[0203] The multimedia component 508 includes a screen that provides an output interface between the electronic device 500 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensors can not only sense the boundaries of touch or swipe actions but also detect the duration and pressure associated with the touch or swipe operations. In some embodiments, the multimedia component 508 includes a front camera and / or a rear camera. When the electronic device 500 is in an operating mode, such as a shooting mode or a multimedia mode, the front camera and / or the rear camera can receive external multimedia data. Each of the front camera and the rear camera may be a fixed optical lens system or have focal length and optical zoom capabilities.

[0204] The audio component 510 is used to output and / or input audio signals. For example, the audio component 510 includes a microphone (MIC) that is used to receive external audio signals when the electronic device 500 is in an operating mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signal can be further stored in the memory 505 or transmitted via the communication component 516. In some embodiments, the audio component 510 further includes a speaker for outputting audio signals.

[0205] The I / O interface 512 provides an interface between the processing component 502 and a peripheral interface module, and the peripheral interface module may be a keyboard, a click wheel, buttons, etc. These buttons may include, but are not limited to: a home button, a volume button, a start button, and a lock button.

[0206] The sensor component 514 includes one or more sensors for providing status assessments of various aspects of the electronic device 500. For example, the sensor component 514 can detect the on / off state of the electronic device 500, the relative positioning of components, such as the display and keypad of the electronic device 500. The sensor component 514 can also detect a change in the position of the electronic device 500 or a component of the electronic device 500, the presence or absence of user contact with the electronic device 500, the orientation or acceleration / deceleration of the electronic device 500, and the temperature change of the electronic device 500. The sensor component 514 can include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor component 514 can also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor component 514 can further include an acceleration sensor, a gyro sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

[0207] The communication component 516 is used to facilitate communication between the electronic device 500 and other devices in a wired or wireless manner. The electronic device 500 can access a wireless network based on communication standards, such as WiFi, a carrier network (such as 2G, 3G, 4G, or 5G), or a combination thereof. In an exemplary embodiment, the communication component 516 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 516 further includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0208] In an exemplary embodiment, the electronic device 500 may be implemented by one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors or other electronic components, and is used to implement a precise photography control measurement method provided by an embodiment of the present application.

[0209] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is further provided, such as a memory 504 including instructions. The above instructions can be executed by a processor 520 of the electronic device 500 to complete the above method. For example, the non-transitory storage medium may be a ROM, a random access memory (RAM), a CDROM, a magnetic tape, a floppy disk, an optical data storage device, etc.

[0210] Figure 13 FIG. is a block diagram of an electronic device 600 shown according to an exemplary embodiment. For example, the electronic device 600 may be provided as a server. Referring to Figure 13 , the electronic device 600 includes a processing component 622, which further includes one or more processors, and memory resources represented by a memory 632 for storing instructions executable by the processing component 622, such as application programs. The application programs stored in the memory 632 may include one or more modules each corresponding to a set of instructions. In addition, the processing component 622 is configured to execute instructions to perform a precise photography control measurement method provided by an embodiment of the present application.

[0211] The electronic device 600 may further include a power supply component 626 configured to perform power management of the electronic device 600, a wired or wireless network interface 650 configured to connect the electronic device 600 to a network, and an input / output (I / O) interface 658. The electronic device 600 may operate based on an operating system stored in the memory 632, such as Windows ServerTM, Mac OS XTM, UnixTM, LinuxTM, FreeBSD TM or the like.

[0212] An embodiment of the present application further provides a computer program product, including a computer program, which implements a precise photography control measurement method when executed by a processor.

[0213] Other embodiments of the present application will be readily contemplated by those skilled in the art upon consideration of the specification and practice of the application disclosed herein. The present application is intended to cover any variations, uses, or adaptations of the present application, which follow the general principles of the present application and include known common general knowledge or conventional technical means in the technical field not disclosed in the present application. The specification and examples are only illustrative, and the true scope and spirit of the present application are pointed out by the following claims.

[0214] It should be understood that the present application is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present application is only limited by the appended claims.

[0215] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

[0216] The above has introduced in detail a precise photography control measurement method, device, electronic device, and computer-readable storage medium provided by the present application. Specific examples are used herein to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the method and its core idea of the present application; at the same time, for those of ordinary skill in the art, according to the idea of the present application, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present application.

Claims

1. A precision photography control measurement method, characterized in that: include: For each second total station set up at the second survey station, measure the third positional relationship between the second total station and each control network point in sight with the second total station in sequence in a clockwise or counterclockwise direction; obtain the control network point coordinates of the control network point according to the preset survey station coordinates of the second survey station and the third positional relationship; the third positional relationship includes a third distance, a third horizontal angle and a third zenith distance between the second total station and the control network point; There are multiple second measuring stations, the control points are multiple control points located in the surrounding area of ​​the measured object, and the second measuring station is located in the area between the measured object and the control points; A plurality of measured points are arranged on the measured object; By setting up a first total station at a first measuring station, a first positional relationship between the first total station and the control network point is obtained, and a second positional relationship between the first total station and the measured point is obtained; the first positional relationship includes a first distance, a first horizontal angle, and a first vertical distance between the first total station and the control network point, and the second positional relationship includes a second distance, a second horizontal angle, and a second vertical distance between the first total station and the measured point; The measured point coordinates of the measured point are acquired according to the control point coordinates of the control point, the first positional relationship and the second positional relationship, and the contour of the measured object is determined according to the measured point coordinates.

2. The method according to claim 1, characterized in that For each second total station set up at the second survey station, sequentially measuring the third positional relationship between the second total station and each of the control network points in sight with the second total station in a clockwise or counterclockwise direction, including: For each second total station set up at the second survey station, obtaining a first target control network point corresponding to the second total station from the control network points in sight with the second total station; Taking the first target control point as the backsight starting direction of the second total station, the third position relationship between the second total station and each control point in sight with the second total station is measured in sequence in a clockwise or counterclockwise direction.

3. The method according to claim 2, characterized in that The control grid points at least include control grid points located at four first corner points of the area around the measured object; the second measuring stations at least include second measuring stations located at four second corner points of the area between the measured object and the control grid points; For each second total station set up at the second survey station, obtaining a first target control network point corresponding to the second total station from control network points in line of sight with the second total station includes: According to the clockwise or counterclockwise arrangement direction, the four control grid points located at the four first corner points are respectively determined as the first target control grid points corresponding one-to-one to the second measuring stations located at the four second corner points.

4. The method according to claim 3, characterized in that At least one control grid point is arranged between every two adjacent control grid points at the first corner points; Each control network point has line of sight with the second total stations at at least three second survey stations.

5. The method according to claim 1, characterized in that Acquiring the control grid point coordinates of the control grid point according to the preset station coordinates of the second station and the third positional relationship includes: The preset station coordinates of the second station and the third positional relationship are used as input parameters of an adjustment algorithm, and the control network point coordinates of the control network point are calculated by the adjustment algorithm.

6. The method according to claim 1, characterized in that There are a plurality of first measuring stations, a plurality of control points, and the first measuring station is located in an area between the measured object and the control points; a first positional relationship between the first total station and the control points is obtained by setting up a first total station at the first measuring station, and a second positional relationship between the first total station and the measured point is obtained, including: For each first total station set up at the first survey station, the first position relationship between the first total station and each of the control network points that are in sight with the first total station is obtained in sequence in a clockwise or counterclockwise direction, and the second position relationship between the first total station and the measured point that is in sight with the first total station is obtained.

7. The method according to claim 6, characterized in that For each first total station set up at the first survey station, sequentially obtaining a first position relationship between the first total station and each of the control network points in sight with the first total station in a clockwise or counterclockwise direction, and obtaining a second position relationship between the first total station and the measured point in sight with the first total station, including: For each first total station set up at the first survey station, obtaining a second target control network point corresponding to the first total station from the control network points in sight with the first total station; Taking the second target control point as the backsight starting direction of the first total station, the first position relationship between the first total station and each control point in sight with the first total station is measured in sequence in a clockwise or counterclockwise direction, and the second position relationship between the first total station and each measured point in sight with the first total station is measured in sequence.

8. The method according to claim 7, characterized in that The plurality of control points include control points at four first corner points around the measured object, and one control point is arranged between every two adjacent first corner points; the first measuring stations include at least eight first measuring stations located in the area between the measured object and the control points; The step of acquiring, for each first total station set up at the first survey station, a second target control network point corresponding to the first total station from control network points in line of sight with the first total station, comprises: According to the clockwise or counterclockwise arrangement direction, the eight control points are respectively determined as second target control points corresponding to the first measuring stations one by one.

9. The method according to claim 8, characterized in that The first total station at each of the first survey stations has line of sight with at least four of the control points.

10. The method according to claim 1, characterized in that There are a plurality of the first measuring stations, there are a plurality of the control points, and the first measuring stations are located in an area between the measured object and the control points; The acquiring the measured point coordinates of the measured point according to the control grid point coordinates of the control grid point, the first positional relationship and the second positional relationship comprises: The control grid point coordinates of the control grid points, the first positional relationship and the second positional relationship are used as input parameters of an adjustment algorithm, and the coordinates of the measured point are calculated by the adjustment algorithm.

11. The method according to claim 1, characterized in that: There are a plurality of the first measuring stations, there are a plurality of the control points, and the first measuring stations are located in an area between the measured object and the control points; Acquiring the measured point coordinates of the measured point according to the control point coordinates of the control point, the first position relationship and the second position relationship, including: For each first total station arranged at the first survey station, initial measured point coordinates of the measured point in line of sight with the first total station are obtained according to the control network point coordinates of the control network point, the first positional relationship between the first total station and the control network point, and the second positional relationship between the first total station and the measured point in line of sight with the first total station; For each measured point, the initial measured point coordinates obtained by each first total station that has line of sight with the measured point are averaged to obtain the measured point coordinates of the measured point.

12. A precision photography control measuring device, characterized in that: include: A first acquisition module is used for measuring, for each second total station set up at the second survey station, a third positional relationship between the second total station and each control network point in sight with the second total station in a clockwise or counterclockwise direction; and acquiring the control network point coordinates of the control network point according to the preset survey station coordinates of the second survey station and the third positional relationship; the third positional relationship includes a third distance, a third horizontal angle, and a third zenith distance between the second total station and the control network point; There are multiple second measuring stations, the control points are multiple control points located in the surrounding area of ​​the measured object, and the second measuring station is located in the area between the measured object and the control points; A plurality of measured points are arranged on the measured object; A second acquisition module is used to acquire a first positional relationship between the first total station and the control network point, and to acquire a second positional relationship between the first total station and the measured point by means of a first total station set up at a first measuring station; the first positional relationship includes a first distance, a first horizontal angle, and a first vertical distance between the first total station and the control network point, and the second positional relationship includes a second distance, a second horizontal angle, and a second vertical distance between the first total station and the measured point; The third acquisition module is used to acquire the measured point coordinates of the measured point according to the control point coordinates of the control point, the first position relationship and the second position relationship, and determine the contour of the measured object according to the measured point coordinates.

13. A precision photography control measurement system, characterized in that: include: A control network point coordinate acquisition module is used to measure, for each second total station set up at the second survey station, the third positional relationship between the second total station and each control network point in sight with the second total station in a clockwise or counterclockwise direction; and to acquire the control network point coordinates of the control network point according to the preset survey station coordinates of the second survey station and the third positional relationship; the third positional relationship includes a third distance, a third horizontal angle and a third zenith distance between the second total station and the control network point; There are multiple second measuring stations, the control points are multiple control points located in the surrounding area of ​​the measured object, and the second measuring station is located in the area between the measured object and the control points; A plurality of measured points are arranged on the measured object; A first total station set up at a first survey station is used to obtain a first positional relationship between the first total station and the control network point, and to obtain a second positional relationship between the first total station and the measured point; the first positional relationship includes a first distance, a first horizontal angle, and a first vertical distance between the first total station and the control network point, and the second positional relationship includes a second distance, a second horizontal angle, and a second vertical distance between the first total station and the measured point; The measured point coordinate acquisition module is used to acquire the measured point coordinates of the measured point according to the control point coordinates of the control point, the first position relationship and the second position relationship, and determine the contour of the measured object according to the measured point coordinates.

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