Precision trigonometric leveling method, device and system

Abstract

The present application provides a precise trigonometric leveling method, device and system. The method includes: obtaining a first line-of-sight elevation difference between a first target measuring station and a first elevation point, and a second line-of-sight elevation difference between the first target measuring station and a second elevation point through a measuring device of the first target measuring station; obtaining a third line-of-sight elevation difference between a second target measuring station and the first elevation point, and a fourth line-of-sight elevation difference between the second target measuring station and the second elevation point through a measuring device of the second target measuring station; obtaining a first elevation difference between the second elevation point and the first elevation point according to the second line-of-sight elevation difference and the first line-of-sight elevation difference, obtaining a second elevation difference between the second elevation point and the first elevation point according to the fourth line-of-sight elevation difference and the third line-of-sight elevation difference, and obtaining a second elevation value of the second elevation point according to the first elevation value of the first elevation point, the first elevation difference and the second elevation difference. The method of the present application can accurately and quickly obtain the elevation value of the elevation point.

Description

Technical Field

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

[0002] In some application scenarios, it is necessary to measure the elevation of a measured point. Further, the measured point is a point in a geographical area for which an elevation value needs to be obtained.

[0003] In the related art, usually an instrument is set up at a measurement point A with a known elevation, the elevation difference between the measurement point A and the measured point B is measured by the instrument, and then an instrument is set up at the measured point B, and the elevation difference between the measured point B and the measurement point A is measured by the instrument at the measured point B. The average value between the two elevation differences is obtained, and based on the average value between the elevation differences, the elevation of the measured point B is obtained.

[0004] However, if there is an unobstructed view situation between the measurement point A and the measured point B, then the elevation difference between the measurement point A and the measured point B cannot be measured by the method of the related art, and thus the elevation of the measured point B cannot be obtained. That is, the method of the related art may have the problem that the elevation of the measured point cannot be obtained. Summary of the Invention

[0005] Embodiments of this application provide a precise trigonometric leveling method, device and system to solve the problem that the elevation of a measured point may not be obtained in the prior art.

[0006] In a first aspect, embodiments of this application provide a precise trigonometric leveling method, including: obtaining a first line-of-sight elevation difference between the first target measuring station and a first elevation point, and a second line-of-sight elevation difference between the first target measuring station and a second elevation point through a measuring device set up at the first target measuring station; the first elevation point has a first elevation value; obtaining a third line-of-sight elevation difference between the second target measuring station and the first elevation point, and a fourth line-of-sight elevation difference between the second target measuring station and the second elevation point through a measuring device set up at the second target measuring station; obtaining a first elevation difference between the second elevation point and the first elevation point according to the second line-of-sight elevation difference and the first line-of-sight elevation difference, and obtaining a second elevation difference between the second elevation point and the first elevation point according to the fourth line-of-sight elevation difference and the third line-of-sight elevation difference; obtaining a second elevation value of the second elevation point according to the first elevation value, the first elevation difference and the second elevation difference.

[0007] In a second aspect, an embodiment of the present application provides a precise trigonometric leveling device, including: a first acquisition module, configured to obtain a first line-of-sight elevation difference between the first target survey station and a first elevation point, and a second line-of-sight elevation difference between the first target survey station and a second elevation point through a surveying device installed at the first target survey station; the first elevation point has a first elevation value; a second acquisition module, configured to obtain a third line-of-sight elevation difference between the second target survey station and the first elevation point, and a fourth line-of-sight elevation difference between the second target survey station and the second elevation point through a surveying device installed at the second target survey station; a third acquisition module, configured to obtain a first elevation difference between the second elevation point and the first elevation point according to the second line-of-sight elevation difference and the first line-of-sight elevation difference, and obtain a second elevation difference between the second elevation point and the first elevation point according to the fourth line-of-sight elevation difference and the third line-of-sight elevation difference; a fourth acquisition module, configured to obtain a second elevation value of the second elevation point according to the first elevation value, the first elevation difference, and the second elevation difference.

[0008] In a third aspect, an embodiment of the present application further provides a precise trigonometric leveling system, the system including a surveying device and a data processing module; the surveying device is configured to obtain a first line-of-sight elevation difference between a first target survey station and a first elevation point, and a second line-of-sight elevation difference between the first target survey station and a second elevation point; the first elevation point has a first elevation value; the surveying device is further configured to obtain a third line-of-sight elevation difference between a second target survey station and the first elevation point, and a fourth line-of-sight elevation difference between the second target survey station and the second elevation point; the data processing module is configured to obtain a first elevation difference between the second elevation point and the first elevation point according to the second line-of-sight elevation difference and the first line-of-sight elevation difference, and obtain a second elevation difference between the second elevation point and the first elevation point according to the fourth line-of-sight elevation difference and the third line-of-sight elevation difference; the data processing module is further configured to obtain a second elevation value of the second elevation point according to the first elevation value, the first elevation difference, and the second elevation difference.

[0009] 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.

[0010] In a fifth aspect, an embodiment of the present application further provides a computer-readable storage medium, when instructions in the computer-readable storage medium are executed by a processor of an electronic device, enabling the electronic device to execute the method of the first aspect.

[0011] In an embodiment of the present application, by using the measuring device installed at the first target measuring station, the first line-of-sight elevation difference between the first target measuring station and the first elevation point, and the second line-of-sight elevation difference between the first target measuring station and the second elevation point are obtained; by using the measuring device installed at the second target measuring station, the third line-of-sight elevation difference between the second target measuring station and the first elevation point, and the fourth line-of-sight elevation difference between the second target measuring station and the second elevation point are obtained; according to the second line-of-sight elevation difference and the first line-of-sight elevation difference, the first elevation difference between the second elevation point and the first elevation point is obtained, and according to the fourth line-of-sight elevation difference and the third line-of-sight elevation difference, the second elevation difference between the second elevation point and the first elevation point is obtained; according to the first elevation value of the first elevation point, and the two groups of elevation differences between the second elevation point and the first elevation point, namely the first elevation difference and the second elevation difference, the second elevation value of the second elevation point can be accurately obtained. The method of this embodiment has the characteristics of high operation efficiency and high accuracy in measuring elevation differences. Compared with the trigonometric leveling and geometric leveling methods in the related art, this embodiment has a greater advantage in operation efficiency. In this embodiment, the elevation value of the second elevation point with unknown elevation is measured by the measuring devices at the first target measuring station and the second target measuring station. Based on the method of this embodiment, the problem that the elevation value of the elevation point with unknown elevation cannot be obtained due to non-line-of-sight between the elevation point with known elevation and the elevation point with unknown elevation in the related art can be avoided.

[0012] The above description is only an overview of the technical solution of the present application. In order to be able to understand the technical means of the present application more clearly, 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 the present application more obvious and understandable, the specific embodiments of the present application are specifically given below. Brief Description of the Drawings

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0014] Figure 1 It is a schematic diagram of the application scenario of a precise trigonometric leveling method provided by an embodiment of the present application;

[0015] Figure 2 It is a flowchart of the steps of another precise trigonometric leveling method provided by an embodiment of the present application;

[0016] Figure 3 It is a schematic diagram of the scenario of another precise trigonometric leveling method provided by an embodiment of the present application;

[0017] Figure 4 It is a flowchart of steps for calculating the third elevation value of the third elevation point provided by an embodiment of the present application;

[0018] Figure 5 It is a flowchart of steps for calculating the third elevation value of the third elevation point provided by an embodiment of the present application;

[0019] Figure 6 It is a flowchart of steps for another precise trigonometric leveling method provided by an embodiment of the present application;

[0020] Figure 7 It is a block diagram of a precise trigonometric leveling device provided by an embodiment of the present application;

[0021] Figure 8 It is a block diagram of a precise trigonometric leveling system provided by an embodiment of the present application;

[0022] Figure 9 It is a block diagram of an electronic device provided by an embodiment of the present invention;

[0023] Figure 10 It is a block diagram of another electronic device of another embodiment of the present invention. Specific Embodiments

[0024] 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.

[0025] 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 here, and the objects distinguished by "first", "second", etc. generally belong to the same category, and the number of objects is not limited. For example, the first object can be one or more. In addition, the term "and / or" in the specification and claims is used to describe the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects before and after. In the embodiments of the present application, the term "multiple" refers to two or more, and other quantifiers are similar.

[0026] Figure 1A precise trigonometric leveling method provided by an embodiment of the present application, with reference to Figure 1 , the method may include the following steps:

[0027] Step 101, through the measuring device installed at the first target measuring station, obtain the first line-of-sight elevation difference between the first target measuring station and the first elevation point, and the second line-of-sight elevation difference between the first target measuring station and the second elevation point.

[0028] Among them, the first elevation point has a first elevation value. Exemplarily, the measuring device may be a total station. The target measuring station is the location where the measuring device is set during measurement.

[0029] Exemplarily, the first line-of-sight distance between the first target measuring station and the first elevation point is approximately equal to the second line-of-sight distance between the first target measuring station and the second elevation point. Specifically, the difference between the first line-of-sight distance and the second line-of-sight distance is less than or equal to a preset line-of-sight distance threshold.

[0030] Step 102, through the measuring device installed at the second target measuring station, obtain the third line-of-sight elevation difference between the second target measuring station and the first elevation point, and the fourth line-of-sight elevation difference between the second target measuring station and the second elevation point.

[0031] Among them, the first target measuring station and the second target measuring station are free virtual measuring stations, the first elevation point is an elevation point with a known elevation value, and the second elevation point is an elevation point with an elevation value to be measured.

[0032] The third line-of-sight distance between the second target measuring station and the first elevation point is approximately equal to the fourth line-of-sight distance between the second target measuring station and the second elevation point. Specifically, the difference between the third line-of-sight distance and the fourth line-of-sight distance is less than or equal to a preset line-of-sight distance threshold.

[0033] Step 103, according to the second line-of-sight elevation difference and the first line-of-sight elevation difference, obtain the first elevation difference between the second elevation point and the first elevation point, and according to the fourth line-of-sight elevation difference and the third line-of-sight elevation difference, obtain the second elevation difference between the second elevation point and the first elevation point.

[0034] Obtain the difference between the second line-of-sight elevation difference and the first line-of-sight elevation difference, and determine this difference as the first elevation difference between the second elevation point and the first elevation point.

[0035] Obtain the difference between the fourth line-of-sight elevation difference and the third line-of-sight elevation difference, and determine this difference as the second elevation difference between the second elevation point and the first elevation point.

[0036] Step 104, according to the first elevation value, the first elevation difference and the second elevation difference, obtain the second elevation value of the second elevation point.

[0037] For example, obtain the average value between the first elevation difference and the second elevation difference, perform a summation process on the average value between the first elevation difference and the second elevation difference and the first elevation value, and obtain a summation result. Determine the summation result as the second elevation value of the second elevation point.

[0038] For example, based on the precise trigonometric leveling method of this embodiment, the instrument can be set up at a free virtual measuring station (including the first target measuring station and the second target measuring station). Through the instrument set up at the free virtual measuring station, the known elevation point (the first elevation point) and the unknown elevation point (the second elevation point) are observed simultaneously, or observed within a preset time period to calculate the elevation difference between the two elevation points. Then, based on the elevation value of the known elevation point (the first elevation value of the first elevation point) and the elevation difference, the elevation value of the unknown elevation point (the second elevation point) is calculated.

[0039] Furthermore, based on the precise trigonometric leveling method of this embodiment, multiple unknown elevation points can be observed simultaneously continuously, or after two or more observations, calculate the difference between the elevation differences obtained from the two or more observations, and evaluate the accuracy of the measurement result according to the difference between the elevation differences obtained from the two or more observations.

[0040] For example, when observing elevation points using the precise trigonometric leveling method, ensure that the sight distances between the same target measuring station and the two elevation points are basically equal. In other words, the difference in sight distances between the same target measuring station and the two elevation points should not be too large, or rather, the difference in sight distances is less than or equal to the sight distance difference threshold. Based on this setting, the influence of the refraction error on the observation result can be reduced, and thus the accuracy of the calculation result of the elevation value of the elevation point to be measured can be improved.

[0041] The precise trigonometric leveling technical method of this embodiment can be applied to various engineering survey fields of high-grade elevation survey. For example, in the field of precise satellite positioning survey, through satellite positioning technology, the longitude and latitude information of the point to be measured can be obtained; the point to be measured can be used as an elevation point, and based on the method of this embodiment, the elevation value of the point to be measured can be obtained. Thus, in combination with satellite positioning technology, the three-dimensional information of the point to be measured can be obtained, and the three-dimensional information includes longitude and latitude information, as well as the elevation value. Based on the method of this embodiment, it can provide high-precision and high-efficiency elevation measurement results for the precise satellite positioning strategy technology, and effectively improve the side length projection accuracy of the precise satellite positioning survey technology.

[0042] In the trigonometric leveling method in the related art, the instrument is set up at the elevation point A with a known elevation. Through the instrument set up at the elevation point A, the elevation difference of the elevation point B with an unknown elevation is observed, and the elevation of the elevation point B is calculated based on the elevation difference. Then, the instrument is set up at the elevation point B to observe the elevation difference of the elevation point A, and the average value of the two elevation differences is taken, and the elevation of the elevation point B is calculated based on the average value. However, if there is no line of sight between the elevation point A and the elevation point B, the elevation value of the elevation point B cannot be obtained according to this method.

[0043] In this embodiment, through the measuring device set up at the first target measuring station, the first line-of-sight elevation difference between the first target measuring station and the first elevation point, and the second line-of-sight elevation difference between the first target measuring station and the second elevation point are obtained; through the measuring device set up at the second target measuring station, the third line-of-sight elevation difference between the second target measuring station and the first elevation point, and the fourth line-of-sight elevation difference between the second target measuring station and the second elevation point are obtained; according to the second line-of-sight elevation difference and the first line-of-sight elevation difference, the first elevation difference between the second elevation point and the first elevation point is obtained, and according to the fourth line-of-sight elevation difference and the third line-of-sight elevation difference, the second elevation difference between the second elevation point and the first elevation point is obtained; according to the first elevation value of the first elevation point, and the two sets of elevation differences between the second elevation point and the first elevation point, namely the first elevation difference and the second elevation difference, the second elevation value of the second elevation point can be accurately obtained. The method of this embodiment has the characteristics of high operation efficiency and high accuracy in measuring elevation differences, that is, compared with the trigonometric leveling and geometric leveling methods in the related art, this embodiment has a greater advantage in operation efficiency. In addition, in this embodiment, through the measuring devices at the first target measuring station and the second target measuring station, the elevation value of the second elevation point with an unknown elevation is measured. Based on the method of this embodiment, the problem that the elevation value of the elevation point with an unknown elevation cannot be obtained due to the lack of line of sight between the elevation point with a known elevation and the elevation point with an unknown elevation in the related art can be avoided.

[0044] Referring to Figure 2 , the method may further include the following steps:

[0045] Step 201, determine a plurality of elevation points to be measured, and divide the plurality of elevation points to be measured into a plurality of groups to be measured.

[0046] For example, referring to Figure 3 , the elevation points to be measured include a total of N elevation points from B1 to BN. Among them, each elevation point to be measured has corresponding position information.

[0047] The N elevation points to be measured can be divided into a plurality of groups to be measured according to the position information of the elevation points to be measured. For example, according to the position information of the elevation points to be measured, the sorting of the N elevation points to be measured along the preset direction is obtained, and according to the sorting result, the N elevation points to be measured are divided into a plurality of groups to be measured.

[0048] The number of elevation points to be measured in each group to be measured may be equal or unequal. Exemplarily, multiple elevation points to be measured within a preset range interval may be divided into the same group to be measured.

[0049] Step 202, for each group to be measured, respectively determine the elevation points to be measured in the group to be measured as a first elevation point, a second elevation point, and a third elevation point.

[0050] Exemplarily, according to the position information of the elevation points to be measured in the group to be measured, the elevation points to be measured in the group to be measured may be respectively determined as a first elevation point, a second elevation point, and a third elevation point. For example, according to the arrangement order of the points to be measured in the preset direction in the group to be measured, the points to be measured may be sequentially determined as a first elevation point, a second elevation point, and a third elevation point.

[0051] Exemplarily, in the case where there are only two elevation points to be measured in the group to be measured, the elevation points to be measured therein are respectively determined as a first elevation point and a second elevation point.

[0052] Among them, in two adjacent groups to be measured, some of the elevation points to be measured in the previous group to be measured are the same as some of the elevation points to be measured in the subsequent group to be measured.

[0053] The number of the same elevation points to be measured in two adjacent groups to be measured can be set according to requirements. For example, it can be one, two, or other numbers, which are not limited herein.

[0054] In two adjacent groups to be measured, some of the elevation points to be measured in the previous group to be measured are the same as some of the elevation points to be measured in the subsequent group to be measured. Thus, after calculating the elevation values of each elevation point to be measured in the previous group to be measured according to the method of the foregoing embodiment, when calculating the elevation values of each elevation point to be measured in the subsequent group to be measured, the elevation points that are the same as those in the previous group to be measured can be used as the elevation points with known elevation values, and according to the elevation points with known elevation values, calculate the elevation values of other elevation points with unknown elevation values.

[0055] Exemplarily, according to the position information of the elevation points to be measured in the group to be measured, for example, according to the position arrangement of the group to be measured in the preset direction, sort the groups to be measured, and sequentially measure the elevation points in multiple groups to be measured according to the sorting serial numbers of the groups to be measured.

[0056] For example, referring to Figure 3 , the elevation points to be measured , and are a group, which can be marked as the first group to be measured; the elevation points to be measured , and can be grouped together and marked as the second group of groups to be measured. There are the same elevation points to be measured in these two adjacent groups to be measured and .

[0057] Among them, the elevation point to be measured with a known first elevation value is the first elevation point. In the first group of groups to be measured, according to the first elevation value of the first elevation point , obtain the second elevation value of the second elevation point , and the third elevation value of the third elevation point .

[0058] After measuring the elevation values of the elevation points to be measured in the first group to be measured, start measuring the elevation values of the elevation points in the second group to be measured. Specifically, determine the elevation point B2 of the elevation point to be measured whose elevation value has been calculated as the first elevation point in the second group to be measured. Based on this first elevation point, according to the method of this embodiment, calculate the third elevation value of the third elevation point in the second group to be measured. And so on, obtain the elevation values of all elevation points to be measured in all groups to be measured

[0059] Step 203, through the measuring device installed at the first target measuring station, obtain the first line-of-sight elevation difference between the first target measuring station and the first elevation point, and the second line-of-sight elevation difference between the first target measuring station and the second elevation point

[0060] Among them, the first elevation point has a first elevation value

[0061] For the method of this step, reference can be made to the description of the foregoing step 101, and details are not repeated here

[0062] Step 204, through the measuring device installed at the second target measuring station, obtain the third line-of-sight elevation difference between the second target measuring station and the first elevation point, and the fourth line-of-sight elevation difference between the second target measuring station and the second elevation point

[0063] For the method of this step, it has been described in the foregoing step 102, and details are not repeated here

[0064] Step 205, according to the second line-of-sight elevation difference and the first line-of-sight elevation difference, obtain the first elevation difference between the second elevation point and the first elevation point, and according to the fourth line-of-sight elevation difference and the third line-of-sight elevation difference, obtain the second elevation difference between the second elevation point and the first elevation point

[0065] For the method of this step, it has been described in the foregoing step 103, and details are not repeated here

[0066] Step 206: Obtain the second elevation value of the second elevation point based on the first elevation value, the first elevation difference, and the second elevation difference.

[0067] The method of this step has been described in the aforementioned step 104 and will not be elaborated here.

[0068] Exemplarily, step 206 may include the following sub-steps:

[0069] Sub-step 2061: Obtain the difference between the first elevation difference and the second elevation difference.

[0070] The first elevation difference represents the elevation difference between the first elevation point and the second elevation point obtained by the measuring device at the first target measuring station; the second elevation difference represents the elevation difference between the first elevation point and the second elevation point obtained by the measuring device at the second target measuring station.

[0071] The difference between the first elevation difference and the second elevation difference can reflect the magnitude of the difference between the elevation difference between the first elevation point and the second elevation point measured by the measuring device at the first target measuring station and the elevation difference between the first elevation point and the second elevation point measured by the measuring device at the second target measuring station.

[0072] Sub-step 2062: If the difference between the first elevation difference and the second elevation difference is less than or equal to the elevation difference threshold, then obtain the second elevation value of the second elevation point based on the first elevation value, the first elevation difference, and the second elevation difference.

[0073] If the difference between the first elevation difference and the second elevation difference is less than or equal to the elevation difference threshold, it indicates that the difference between the elevation difference between the first elevation point and the second elevation point measured by the measuring device at the first target measuring station and the elevation difference between the first elevation point and the second elevation point measured by the measuring device at the second target measuring station is small enough, indicating a small measurement error. In this case, obtain the second elevation value of the second elevation point based on the first elevation value, the first elevation difference, and the second elevation difference, and the accuracy of the obtained second elevation value is high.

[0074] Sub-step 2063: If the difference between the first elevation difference and the second elevation difference is greater than the elevation difference threshold, then re-enter the step of obtaining the first line-of-sight elevation difference between the first target measuring station and the first elevation point, and the second line-of-sight elevation difference between the first target measuring station and the second elevation point through the measuring device installed at the first target measuring station, in order to obtain a new first elevation difference and a new second elevation difference, until the new fifth difference between the new first elevation difference and the new second elevation difference is less than or equal to the first difference threshold.

[0075] If the difference between the first elevation difference and the second elevation difference is greater than the elevation difference threshold, which characterizes the comparison of the elevation difference between the first elevation point and the second elevation point measured by the measuring device at the first target survey station and the elevation difference between the first elevation point and the second elevation point measured by the measuring device at the second target survey station, indicating a large measurement error. In this case, re-enter the step of obtaining the first line-of-sight elevation difference between the first target survey station and the first elevation point, and the second line-of-sight elevation difference between the first target survey station and the second elevation point through the measuring device installed at the first target survey station, in order to retest the elevation points that do not meet the requirements. Specifically, in this case, re-execute steps 203 to 206 to obtain a new first elevation difference and a new second elevation difference until the new difference between the new first elevation difference and the new second elevation difference is less than or equal to the first difference threshold.

[0076] Sub-step 2064, obtain the second elevation value of the second elevation point according to the first elevation value, the new first elevation difference and the new second elevation difference.

[0077] When the new difference between the new first elevation difference and the new second elevation difference is less than or equal to the first difference threshold, in this case, obtain the second elevation value of the second elevation point according to the first elevation value, the new first elevation difference and the new second elevation difference, and the accuracy of this second elevation value is high.

[0078] Step 206 includes the following sub-steps:

[0079] Sub-step 2065, obtain the third average value between the first elevation difference and the second elevation difference.

[0080] The third average value between the first elevation difference and the second elevation difference can accurately characterize the elevation difference between the first elevation point and the second elevation point.

[0081] Sub-step 2066, perform a summation process on the first elevation value and the third average value to obtain the second elevation value.

[0082] For example, the first elevation value of the first elevation point is , the first line-of-sight elevation difference measured by the measuring device at the first target survey station is , and the second line-of-sight elevation difference is ; the third line-of-sight elevation difference measured by the measuring device at the second target survey station is , and the fourth line-of-sight elevation difference is ; then the first elevation difference is: , and the second elevation difference is .

[0083] Furthermore, the second elevation value of the second elevation point is:

[0084]

[0085] In an actual measurement environment, if there is a spherical atmosphere error in the observation, when the sight distances are basically equal, the influence values of the spherical atmosphere error on the elevation difference measurement results in the two line-of-sight directions are also basically equal. Assuming that the influence value of the spherical atmosphere error on the elevation difference is , then when considering the spherical atmosphere error, the second elevation value of the second elevation point is:

[0086]

[0087] It can be seen from this that based on the method of steps 201 to 206 to obtain the second elevation value of the second elevation point, the influence of the spherical atmosphere on the elevation is eliminated during the process of calculating the second elevation value. In other words, based on the method of this embodiment, the second elevation value of the second elevation point can be made unaffected by the spherical atmosphere error, improving the accuracy of the second elevation value of the second elevation point.

[0088] In trigonometric leveling, the earth curvature difference can be corrected when calculating the elevation difference through the sight distance length. When the distance between two ground points is less than 300 meters, these assumptions can be approximated. However, when the distance between the two points exceeds 300 meters, the influence of the earth curvature on the elevation should be considered. Among them, the curvature correction is called the spherical aberration correction, and its correction number is c. The earth curvature will affect the observation line of sight. In order to avoid the influence of the earth curvature difference on the second elevation value of the second elevation point, the sight distances between the first target station and the first elevation point, and between the second target station and the second elevation point can be made less than 300 meters to avoid the influence of the earth curvature difference, thereby improving the accuracy of the second elevation value of the second elevation point.

[0089] In one embodiment, obtain the first connection line between the first target station and the first elevation point, and the second connection line between the first target station and the second elevation point; obtain the corresponding relationship between the sunlight incident direction and different preset times. According to the corresponding relationship, obtain the target time point when the included angles between the sunlight incident direction and the first connection line, and the second connection line are closest to 90°. The measuring devices of the first target station and the second target station measure the elevation difference at the target time point.

[0090] The influence of atmospheric refraction error is very complex. The influence of atmospheric refraction error can be avoided or reduced by adjusting the observation direction. Through experimental research, when the incident direction of light (such as sunlight) is perpendicular to the connecting line direction of the two elevation points to be observed, the influence values on the elevation difference measurement of the two elevation points are basically equal, while there are significant differences when the light is parallel to the incident direction. Therefore, by obtaining the target time point when the included angles between the incident direction of sunlight and the first connecting line, as well as the second connecting line are closest to 90°, the measuring devices at the first target measuring station and the second target measuring station measure the elevation difference at the target time point, which can minimize the influence of light on the elevation difference and further improve the accuracy of obtaining the second elevation value of the second elevation point.

[0091] Step 207: Obtain the fifth line-of-sight elevation difference between the first target measuring station and the third elevation point through the measuring device installed at the first target measuring station, and obtain the sixth line-of-sight elevation difference between the second target measuring station and the third elevation point through the measuring device installed at the second target measuring station.

[0092] Among them, the first target measuring station and the second target measuring station need to meet at least some of the following conditions:

[0093] Condition 1: Among the first sight distance between the first target measuring station and the first elevation point, the second sight distance between the first target measuring station and the second elevation point, and the third sight distance between the first target measuring station and the third elevation point, the sight distance difference between any two sight distances is less than or equal to the preset sight distance difference threshold.

[0094] Specifically, the sight distance difference between the first sight distance and the second sight distance is less than or equal to the preset sight distance difference threshold; the sight distance difference between the first sight distance and the third sight distance is less than or equal to the preset sight distance difference threshold; the sight distance difference between the second sight distance and the third sight distance is also less than or equal to the preset sight distance difference threshold.

[0095] Condition 2: Among the fourth sight distance between the second target measuring station and the first elevation point, the fifth sight distance between the second target measuring station and the second elevation point, and the sixth sight distance between the second target measuring station and the third elevation point, the sight distance difference between any two sight distances is less than or equal to the preset sight distance difference threshold.

[0096] Specifically, the sight distance difference between the fourth sight distance and the fifth sight distance is less than or equal to the preset sight distance difference threshold; the sight distance difference between the fourth sight distance and the sixth sight distance is less than or equal to the preset sight distance difference threshold; the sight distance difference between the fifth sight distance and the sixth sight distance is less than or equal to the preset sight distance difference threshold.

[0097] Condition 3: The measuring device located at the first target measuring station and the first elevation point, the second elevation point, and the third elevation point are all in a line-of-sight state.

[0098] Condition 4: The measuring device at the second target measuring station, the first elevation point, the second elevation point, and the third elevation point are all in a sighting state.

[0099] Based on the above measurement conditions, it can be ensured that the measuring devices at the first target measuring station and the second target measuring station can successfully measure the elevation difference between the measuring device and the elevation point to be measured, and obtain the elevation value of the elevation point to be measured according to the elevation difference between the measuring device and the elevation point to be measured.

[0100] Furthermore, if the first target measuring station or the second target measuring station does not meet the above conditions, the positions of the first target measuring station and the second target measuring station can be adjusted until the first target measuring station and the second target measuring station meet the above conditions.

[0101] Step 208: Obtain the third elevation difference between the first elevation point and the third elevation point according to the fifth line-of-sight elevation difference and the first line-of-sight elevation difference, and obtain the fourth elevation difference between the first elevation point and the third elevation point according to the sixth line-of-sight elevation difference and the third line-of-sight elevation difference.

[0102] The fifth line-of-sight elevation difference is the line-of-sight elevation difference obtained by the measuring device at the first target measuring station. Therefore, the third elevation difference obtained according to the fifth line-of-sight elevation difference and the first line-of-sight elevation difference is the elevation difference between the third elevation point and the first elevation point obtained by the measuring device at the first target measuring station; the fifth line-of-sight elevation difference is the elevation difference obtained by the measuring device at the second target measuring station. Therefore, the fourth elevation difference obtained according to the sixth line-of-sight elevation difference and the third line-of-sight elevation difference is the elevation difference between the third elevation point and the first elevation point obtained by the measuring device at the second target measuring station.

[0103] Step 209: Obtain the third elevation value of the third elevation point according to the first elevation value, the third elevation difference, and the fourth elevation difference.

[0104] The third elevation difference and the fourth elevation difference are respectively the elevation differences between the third elevation point and the first elevation point obtained by the measuring device at the first target measuring station and the measuring device at the second target measuring station.

[0105] According to the first elevation value and the elevation differences between the third elevation point and the first elevation point obtained by the measuring devices at two different target measuring stations, the third elevation value of the third elevation point can be accurately obtained.

[0106] Optionally, referring to Figure 4 , step 209 may include the following sub-steps:

[0107] Sub-step A1: Obtain the fifth elevation difference between the fifth line-of-sight elevation difference and the second line-of-sight elevation difference, and the sixth elevation difference between the sixth elevation difference and the fourth elevation difference.

[0108] The fifth elevation difference between the fifth line-of-sight elevation difference and the second line-of-sight elevation difference is the elevation difference between the third elevation point and the second elevation point obtained by the measuring device at the first target measuring station.

[0109] The sixth elevation difference between the sixth elevation difference and the fourth elevation difference is the elevation difference between the third elevation point and the second elevation point obtained by the measuring device at the second target measuring station.

[0110] Sub-step A2: Obtain the third elevation value of the third elevation point according to the first elevation value, the first elevation difference, the second elevation difference, the third elevation difference, the fourth elevation difference, as well as the fifth elevation difference and the sixth elevation difference.

[0111] For example, referring to Figure 5 , sub-step A2 may include the following sub-steps:

[0112] Sub-step A21: Obtain the first average value between the third elevation difference and the fourth elevation difference.

[0113] Among them, the third elevation difference may represent the elevation difference between the third elevation point and the first elevation point obtained by the measuring device at the first target measuring station; the fourth elevation difference may represent the elevation difference between the third elevation point and the first elevation point obtained by the measuring device at the second target measuring station.

[0114] Then, the first average value between the third elevation difference and the fourth elevation difference can accurately reflect the elevation difference between the third elevation point and the first elevation point obtained through the two target measuring stations.

[0115] Sub-step A22: Perform a summation process on the first elevation value and the first average value to obtain the first initial elevation value of the third elevation point.

[0116] For example, the first initial elevation value is:

[0117]

[0118] Among them, is the first elevation value, and are respectively the fifth elevation difference of the third elevation point measured by the measuring device at the first target measuring station and the first elevation difference of the first elevation point; and are respectively the sixth elevation difference of the third elevation point measured by the measuring device at the second target measuring station and the third elevation difference of the first elevation point.

[0119] Sub-step A23: Obtain the second average value between the fifth elevation difference and the sixth elevation difference, and the third average value of the first elevation difference and the second elevation difference.

[0120] The fifth elevation difference and the sixth elevation difference respectively represent the elevation differences between the third elevation point and the second elevation point measured by the measuring devices of the first target measuring station and the second target measuring station. Then, the second average value between the fifth elevation difference and the sixth elevation difference can accurately represent the elevation difference between the third elevation point and the second elevation point obtained by the measuring devices of the two target measuring stations.

[0121] The first elevation difference and the second elevation difference respectively represent the elevation differences between the first elevation point and the second elevation point measured by the measuring devices of the first target measuring station and the second target measuring station. Then, the third average value between the first elevation difference and the second elevation difference can accurately represent the elevation difference between the second elevation point and the first elevation point obtained by the measuring devices of the two target measuring stations.

[0122] Sub-step A24: Sum the first elevation value, the second average value, and the third average value to obtain the second initial elevation value of the third elevation point.

[0123] By summing the first elevation value and the second average value, the second elevation value of the second elevation point can be accurately obtained. Summing the first elevation value, the second average value, and the third average value is to sum the second elevation value of the second elevation point and the elevation difference between the second elevation point and the third elevation point to obtain the second initial elevation value of the third elevation point.

[0124] The second initial elevation value of the third elevation point is:

[0125]

[0126] Sub-step A25: Obtain the fourth average value of the first initial elevation value and the second initial elevation value, and determine the fourth average value as the third elevation value of the third elevation point.

[0127] Determining the fourth average value of the first initial elevation value and the second initial elevation value as the third elevation value of the third elevation point is to average the elevation values of the third elevation point obtained by two calculation methods, and determine the fourth average value obtained by the averaging as the third elevation value of the third elevation point, which improves the accuracy of the third elevation value. The third elevation value of the third elevation point is:

[0128]

[0129] Sub-step A25 includes the following sub-steps:

[0130] Sub-step A251: Determine the difference between the first initial elevation value and the second initial elevation value as the closing difference of the line graph.

[0131] The line graph closing difference is used to reflect the error between the elevation values of the third elevation point obtained through two different measurement lines.

[0132] Specifically, the first initial elevation value is the sum of the first elevation value of the first elevation point and the elevation difference between the third elevation point and the first elevation point; the measurement line is the measurement line from the third elevation point to the first elevation point. The second initial elevation value is the sum of the first elevation value of the first elevation point, the elevation difference between the second elevation point and the first elevation point, and the elevation difference between the third elevation point and the second elevation point; the measurement line is the measurement line from the first elevation point, the second elevation point to the third elevation point.

[0133] Therefore, based on the first initial elevation value and the second initial elevation value, the line graph closing difference is obtained, which can reflect the difference between the elevation values of the two third elevation points obtained according to the closed line of the first elevation point, the second elevation point, the third elevation point, and the first elevation point.

[0134] Sub-step A252, if the line graph closing difference is less than or equal to the line graph closing difference threshold, obtain the fourth average value of the first initial elevation value and the second initial elevation value, and determine the fourth average value as the third elevation value of the third elevation point.

[0135] When the line graph closing difference is less than or equal to the line graph closing difference threshold, it indicates that the difference between the elevation values of the third elevation point obtained through the two measurement lines is small, and the accuracy of the elevation values of the third elevation point obtained through the two measurement lines is high. Further, the first initial elevation value and the second initial elevation value are obtained through the two lines respectively, and the fourth average value of the first initial elevation value and the second initial elevation value is determined as the third elevation value of the third elevation point, and the accuracy of the third elevation value is high.

[0136] Sub-step A253, if the line graph closing difference is greater than the line graph closing difference threshold, re-enter the step of obtaining the fifth line-of-sight elevation difference between the first target measuring station and the third elevation point through the measuring device installed at the first target measuring station, and obtaining the sixth line-of-sight elevation difference between the second target measuring station and the third elevation point through the measuring device installed at the second target measuring station, so as to obtain a new first initial elevation value and a new second initial elevation value, and determine the difference between the new first initial elevation value and the new second initial elevation value as the new line graph closing difference until the new line graph closing difference is less than or equal to the second preset threshold.

[0137] If the closing difference of the line pattern is greater than the threshold value of the closing difference of the line pattern, it indicates that the difference between the elevation values of the third elevation points obtained through the two measurement lines is large, indicating that the measurement results of these elevation points do not meet the requirements. It is necessary to re-enter the step of obtaining the fifth line-of-sight elevation difference between the first target measurement station and the third elevation point through the measurement device installed at the first target measurement station, and obtaining the sixth line-of-sight elevation difference between the second target measurement station and the third elevation point through the measurement device installed at the second target measurement station, so as to supplement the elevation points that do not meet the requirements, and further improve the accuracy of the third elevation value of the finally obtained third elevation point.

[0138] Sub-step A254, obtain a new fourth average value of the new first initial elevation value and the new second initial elevation value, and determine the new fourth average value as the third elevation value of the third elevation point.

[0139] For example, referring to Figure 3 , the first elevation group to be measured includes elevation points , and , and the second elevation value to be measured includes elevation points , and .

[0140] In the first elevation group to be measured, the elevation point is the first elevation point with a known elevation value, the elevation points and are the second elevation point and the third elevation point in the first elevation group to be measured respectively, and the target measurement stations and are the first target measurement station and the second target measurement station for the first elevation group to be measured respectively. According to the method of the foregoing embodiment, the second elevation value of the elevation point and the third elevation value of the elevation point can be obtained respectively.

[0141] In the second elevation group to be measured, the elevation points , and are the first elevation point, the second elevation point and the third elevation point in the second elevation group to be measured respectively, and the target measurement stations and are the first target measurement station and the second target measurement station for the second elevation group to be measured respectively. The elevation value of the elevation point is known, and the elevation value of the elevation point is the first elevation value of the first elevation point in the second elevation group to be measured. Based on the elevation value of the elevation point , according to the method of the foregoing embodiment, the third elevation value of the elevation point with an unknown elevation value can be obtained.

[0142] When measuring a measurement group including elevation points , and , the elevation points , and are respectively the first elevation point, the second elevation point and the third elevation point of the measurement group to be measured; the target survey stations and are respectively the first target survey station and the second target survey station for the measurement group to be measured.

[0143] When using the precise trigonometric leveling method for high-precision and high-grade (such as second-class and above) elevation measurement, it is necessary to conduct precise detection on the instrument and equipment and tools used. After passing the detection, the elevation value is measured based on the instrument and equipment and tools to ensure the accuracy of the measurement result.

[0144] For example, when measuring the elevation value based on the precise trigonometric leveling method of this embodiment, the number of observation runs is greater than or equal to two measurement rounds to ensure the accuracy of the measurement result.

[0145] Compared with the traditional trigonometric leveling method, the precise electronic trigonometric leveling method of this embodiment has more single-station observation directions, a more stable graphic structure, and more redundant observation conditions. Through long-term practice verification, for second-class precision elevation measurement, two runs can meet the measurement accuracy requirements. That is, the method of this embodiment has the characteristics of simple measurement steps and high measurement efficiency while ensuring the accuracy of the measured elevation value.

[0146] The following combines the drawings and details the precise trigonometric leveling method provided by the embodiments of the present application through specific embodiments.

[0147] In one embodiment, referring to Figure 3 , there are multiple elevation points, specifically including elevation points , to , where is a known elevation point, and its elevation is . Figure 6 is a flowchart of the steps of a precise trigonometric leveling method provided by the embodiments of the present application. As Figure 6 shown, the method may include:

[0148] Step S1, set up the instrument at the survey station position, and observe the elevation points , and with basically equal sight distances, and respectively obtain the distance from the survey station position to the elevation point , and elevation differences.

[0149] Among them, the survey station in this step is equivalent to the first target survey station in the foregoing embodiment, and the elevation points , and are respectively equivalent to the first elevation point, the second elevation point, and the third elevation point in the foregoing embodiment. The instrument in this step is the measuring device in the foregoing embodiment.

[0150] Specifically, the elevation differences of the line of sight observed by the survey station to the elevation points , and are respectively , and .

[0151] Step S2: Move the instrument and set it up at the survey station a few meters away from the station, and continue to observe the elevation points , and to respectively obtain the elevation differences from the position of the survey station to the elevation points , and .

[0152] Specifically, the elevation differences of the line of sight observed by the survey station to the elevation points , and are respectively , and .

[0153] Furthermore, referring to the methods in Step S1 and Step S2, observe other survey stations with basically equal stadia distances in sequence.

[0154] For example, through the survey station, respectively observe the elevation differences of the elevation points , and ; and through the survey station, respectively observe the elevation differences of the elevation points , and .

[0155] Again for example, move the instrument and set it up at the survey station, and observe the elevation points with basically equal stadia distances , and , observe the elevation difference between the survey station and the elevation point , and . The elevation differences of the sight lines are respectively , and .

[0156] Move the instrument to the station a few meters away station, and continue to observe the elevation point , and , observe the elevation difference between the survey station and the elevation point , and . The elevation differences of the sight lines are respectively , and .

[0157] Step S3, based on the first elevation value of the elevation point , the elevation differences between the Y11 survey station position and the elevation points B1, B2, B3, and the elevation differences between the Y12 survey station position and the elevation points B1, B2, B3, obtain the elevation values of the elevation points B2 and B3.

[0158] Based on , , , , , h 12 3, calculate the elevation of the elevation point B2 and the elevation of the elevation point B3.

[0159] Among them, the second elevation value of the second elevation point is:[[]]END]]

[0160] ;

[0161] The first initial elevation value of the third elevation point is:[[]]END]]

[0162]

[0163] The second initial elevation value of the third elevation point is:[[]]END]]

[0164]

[0165] The third elevation value of the third elevation point is:[[]]END]]

[0166]

[0167] Discrepancy value of two sight line elevations Among them, the elevation difference discrepancy value is equivalent to the fifth difference between the first elevation difference and the second elevation difference in the foregoing embodiment.

[0168] Closed error of line graph 。

[0169] Further, by analogy, the elevation values of other elevation points are calculated. Specifically, for other elevation points, after obtaining the elevation differences measured by different target survey stations with reference to steps S1 and S2, the elevation values of the elevation points are obtained with reference to the method of step S3.

[0170] The method of this embodiment is a new type of trigonometric leveling technology method developed on the basis of the traditional trigonometric leveling technology method. It is an update and iteration of the traditional trigonometric leveling technology, and is a result of quality improvement, upgrading and innovative development. This method has high measurement efficiency and high measurement accuracy. Further, the method of this embodiment has the characteristics of high operation efficiency and high accuracy of measured elevation difference, that is, compared with the trigonometric leveling and geometric leveling methods in the related art, this embodiment has a greater operation efficiency advantage. In addition, in this embodiment, the elevation values of elevation points with unknown elevations are measured by the measuring devices at two target survey stations, which can avoid the problem that the elevation points with known elevations and the elevation points with unknown elevations in the related art are not visible to each other, resulting in the inability to obtain the elevation values of the elevation points with unknown elevations.

[0171] Reference Figure 7 , which shows a precise trigonometric leveling device provided by an embodiment of the present application. The device 30 includes: a first acquisition module 301, configured to obtain a first sight line elevation difference between a first target survey station and a first elevation point, and a second sight line elevation difference between the first target survey station and a second elevation point through a measuring device installed at the first target survey station; the first elevation point has a first elevation value; a second acquisition module 302, configured to obtain a third sight line elevation difference between a second target survey station and the first elevation point, and a fourth sight line elevation difference between the second target survey station and the second elevation point through a measuring device installed at the second target survey station; a third acquisition module 303, configured to obtain a first elevation difference between the second elevation point and the first elevation point according to the second sight line elevation difference and the first sight line elevation difference, and obtain a second elevation difference between the second elevation point and the first elevation point according to the fourth sight line elevation difference and the third sight line elevation difference; a fourth acquisition module 304, configured to obtain a second elevation value of the second elevation point according to the first elevation value, the first elevation difference and the second elevation difference.

[0172] Optionally, the device 30 further includes: a sixth acquisition module, configured to acquire a fifth line-of-sight elevation difference between the first target survey station and the third elevation point through a measuring device installed at the first target survey station, and acquire a sixth line-of-sight elevation difference between the second target survey station and the third elevation point through a measuring device installed at the second target survey station; a seventh acquisition module, configured to acquire a third elevation difference between the first elevation point and the third elevation point according to the fifth line-of-sight elevation difference and the first line-of-sight elevation difference, and acquire a fourth elevation difference between the first elevation point and the third elevation point according to the sixth line-of-sight elevation difference and the third line-of-sight elevation difference; an eighth acquisition module, configured to obtain a third elevation value of the third elevation point according to the first elevation value, the third elevation difference, and the fourth elevation difference.

[0173] Optionally, the device 30 further includes: a grouping module, configured to determine a plurality of elevation points to be measured and divide the plurality of elevation points to be measured into a plurality of groups to be measured; a first determination module, configured to, for each group to be measured, respectively determine the elevation points to be measured in the group to be measured as a first elevation point, a second elevation point, and a third elevation point.

[0174] Optionally, in two adjacent groups to be measured, some of the elevation points to be measured in the previous group to be measured are the same as some of the elevation points to be measured in the next group to be measured.

[0175] Optionally, among the first line-of-sight distance between the first target survey station and the first elevation point, the second line-of-sight distance between the first target survey station and the second elevation point, and the third line-of-sight distance between the first target survey station and the third elevation point, the first line-of-sight distance difference between any two line-of-sight distances is less than or equal to a preset line-of-sight distance difference threshold; among the fourth line-of-sight distance between the second target survey station and the first elevation point, the fifth line-of-sight distance between the second target survey station and the second elevation point, and the sixth line-of-sight distance between the second target survey station and the third elevation point, the second line-of-sight distance difference between any two line-of-sight distances is less than or equal to a preset line-of-sight distance difference threshold.

[0176] Optionally, the measuring device located at the first target survey station and the first elevation point, the second elevation point, and the third elevation point are all in a sight-through state; the measuring device located at the second target survey station and the first elevation point, the second elevation point, and the third elevation point are all in a sight-through state.

[0177] Optionally, the fourth acquisition module 304 includes:

[0178] a first acquisition sub-module, configured to acquire a fifth elevation difference between the fifth line-of-sight elevation difference and the second line-of-sight elevation difference, and a sixth elevation difference between the sixth line-of-sight elevation difference and the fourth line-of-sight elevation difference; a second acquisition sub-module, configured to obtain a third elevation value of the third elevation point according to the first elevation value, the first elevation difference, the second elevation difference, the third elevation difference, the fourth elevation difference, and the fifth elevation difference and the sixth elevation difference.

[0179] Optionally, the second acquisition sub-module includes: a first acquisition unit configured to acquire a first average value between a third elevation difference and a fourth elevation difference; a second acquisition unit configured to sum the first elevation value and the first average value to obtain a first initial elevation value of a third elevation point; a third acquisition unit configured to acquire a second average value between a fifth elevation difference and a sixth elevation difference, and a third average value between a first elevation difference and a second elevation difference; a fourth acquisition unit configured to sum the first elevation value, the second average value, and the third average value to obtain a second initial elevation value of the third elevation point; a fifth acquisition unit configured to acquire a fourth average value of the first initial elevation value and the second initial elevation value, and determine the fourth average value as the third elevation value of the third elevation point.

[0180] Optionally, the fifth acquisition unit includes: a first determination sub-unit configured to determine a difference between the first initial elevation value and the second initial elevation value as a line graph closure difference; a first acquisition sub-unit configured to, if the line graph closure difference is less than or equal to a line graph closure difference threshold, acquire a fourth average value of the first initial elevation value and the second initial elevation value, and determine the fourth average value as the third elevation value of the third elevation point.

[0181] Optionally, the fifth acquisition unit includes: a second acquisition sub-unit configured to, after obtaining a line graph closure difference based on the first initial elevation value and the second initial elevation value, if the line graph closure difference is greater than the line graph closure difference threshold, re-enter the step of acquiring a fifth line-of-sight elevation difference between a first target survey station and a third elevation point through a surveying device installed at the first target survey station, and acquiring a sixth line-of-sight elevation difference between a second target survey station and the third elevation point through a surveying device installed at the second target survey station, so as to acquire a new first initial elevation value and a new second initial elevation value, and determine a difference between the new first initial elevation value and the new second initial elevation value as a new line graph closure difference until the new line graph closure difference is less than or equal to the line graph closure difference threshold; a third acquisition sub-unit configured to acquire a new fourth average value of the new first initial elevation value and the new second initial elevation value, and determine the new fourth average value as the third elevation value of the third elevation point.

[0182] Optionally, the fourth acquisition module 304 includes: a third acquisition sub-module configured to acquire a fifth difference between a first elevation difference and a second elevation difference; a fourth acquisition sub-module configured to, if the difference between the first elevation difference and the second elevation difference is less than or equal to an elevation difference threshold, obtain a second elevation value of a second elevation point based on the first elevation value, the first elevation difference, and the second elevation difference.

[0183] Optionally, the fourth acquisition module 304 includes: a fifth acquisition sub-module, configured to re-enter the step of acquiring the first line-of-sight elevation difference between the first target measurement station and the first elevation point, and the second line-of-sight elevation difference between the first target measurement station and the second elevation point through the measurement device installed at the first target measurement station if the difference between the first elevation difference and the second elevation difference is greater than the elevation difference threshold, so as to acquire a new first elevation difference and a new second elevation difference until the new difference between the new first elevation difference and the new second elevation difference is less than or equal to the elevation difference threshold; a sixth acquisition sub-module, configured to obtain the second elevation value of the second elevation point according to the first elevation value, the new first elevation difference, and the new second elevation difference.

[0184] Optionally, the fourth acquisition module 304 includes: a seventh acquisition sub-module, configured to acquire a third average value between the first elevation difference and the second elevation difference; an eighth acquisition sub-module, configured to perform a summation process on the first elevation value and the third average value to obtain the second elevation value.

[0185] The method of this embodiment has the characteristics of high operation efficiency and high measurement elevation difference accuracy. Compared with the trigonometric leveling and geometric leveling methods in the related art, this embodiment has a greater operation efficiency advantage. The measurement devices at the first target measurement station and the second target measurement station in this embodiment measure the elevation value of the second elevation point with unknown elevation. Based on the method of this embodiment, the problem that the elevation value of the elevation point with unknown elevation cannot be obtained due to non-line-of-sight between the elevation point with known elevation and the elevation point with unknown elevation in the related art can be avoided.

[0186] In one embodiment, referring to Figure 8 , a precise trigonometric leveling system, the system 40 includes a measurement device 401 and a data processing module 402; the measurement device 401 is configured to acquire the first line-of-sight elevation difference between the first target measurement station and the first elevation point, and the second line-of-sight elevation difference between the first target measurement station and the second elevation point; the first elevation point has a first elevation value; the measurement device 401 is further configured to acquire the third line-of-sight elevation difference between the second target measurement station and the first elevation point, and the fourth line-of-sight elevation difference between the second target measurement station and the second elevation point; the data processing module 402 is configured to acquire the first elevation difference between the second elevation point and the first elevation point according to the second line-of-sight elevation difference and the first line-of-sight elevation difference, and acquire the second elevation difference between the second elevation point and the first elevation point according to the fourth line-of-sight elevation difference and the third line-of-sight elevation difference; the data processing module 402 is further configured to obtain the second elevation value of the second elevation point according to the first elevation value, the first elevation difference, and the second elevation difference.

[0187] The method of this embodiment features high operation efficiency and high accuracy in measuring elevation differences. Compared with the trigonometric leveling and geometric leveling methods in related technologies, this embodiment has a significant advantage in operation efficiency. The measuring devices at the first target measuring station and the second target measuring station of this embodiment measure the elevation value of the second elevation point with an unknown elevation. Based on the method of this embodiment, it is possible to avoid the problem in related technologies where there is no line of sight between the elevation point with a known elevation and the elevation point with an unknown elevation, resulting in the inability to obtain the elevation value of the elevation point with an unknown elevation.

[0188] Figure 9 FIG. 4 is a block diagram of an electronic device 500 shown according to an exemplary embodiment. For example, the electronic device 500 may 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.

[0189] Referring to Figure 9 , the electronic device 500 may include one or more of the following components: a processing component 502, a memory 504, a power 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.

[0190] 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 method. 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.

[0191] The memory 504 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 504 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, a magnetic disk, or an optical disc.

[0192] The power supply component 506 provides power for various components of the electronic device 500. The power supply 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.

[0193] 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 can 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 sense not only 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 can be a fixed optical lens system or have a focal length and optical zoom capabilities. 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 signals can be further stored in the memory 504 or transmitted via the communication component 516. In some embodiments, the audio component 510 further includes a speaker for outputting audio signals.

[0194] 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, click wheel, buttons, etc. These buttons may include, but are not limited to: home button, volume button, power button, and lock button. The sensor component 514 includes one or more sensors for providing an assessment of the status 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 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor component 514 may 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 may further include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

[0195] The communication component 516 facilitates 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, carrier networks (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.

[0196] In an exemplary embodiment, the electronic device 500 can 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 for implementing a precise trigonometric leveling method provided by the embodiments of the present application.

[0197] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 504 including instructions, and the above instructions can be executed by a processor 520 of an electronic device 500 to complete the above method. For example, the non-transitory storage medium can be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, etc.

[0198] Figure 10 FIG. 4 is a block diagram of an electronic device 600 shown according to an exemplary embodiment. For example, the electronic device 600 can be provided as a server. Referring to Figure 10 FIG. 4, 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 can 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 trigonometric leveling method provided in an embodiment of the present application.

[0199] 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 can operate based on an operating system stored in the memory 632, such as WindowsServerTM, Mac OS XTM, UnixTM, LinuxTM, FreeBSDTM or the like.

[0200] An embodiment of the present application also provides a computer program product, including a computer program, and a precise trigonometric leveling method implemented when the computer program is executed by a processor.

[0201] Those skilled in the art will readily think of other embodiments of the present application after considering the specification and practicing 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 knowledge or conventional technical means in the technical field not disclosed in the present application. The specification and embodiments are only regarded as exemplary, and the true scope and spirit of the present application are pointed out by the following claims.

[0202] 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.

[0203] 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.

[0204] The above has introduced in detail a precise trigonometric leveling method, device, electronic device and computer-readable storage medium provided by the present application. Specific examples are used in this article 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 trigonometric height measurement method, characterized in that: include: By means of a measuring device set up at a first target station, a first sight elevation difference between the first target station and a first elevation point and a second sight elevation difference between the first target station and a second elevation point are obtained; The first elevation point has a first elevation value; By means of a measuring device installed at a second target station, a third sight line elevation difference between the second target station and the first elevation point and a fourth sight line elevation difference between the second target station and the second elevation point are obtained; According to the second sight line elevation difference and the first sight line elevation difference, a first elevation difference between the second elevation point and the first elevation point is obtained, and according to the fourth sight line elevation difference and the third sight line elevation difference, a second elevation difference between the second elevation point and the first elevation point is obtained; Obtaining a second elevation value of the second elevation point according to the first elevation value, the first elevation difference and the second elevation difference; Obtaining a fifth sight line elevation difference between the first target station and a third elevation point by using a measuring device installed at the first target station, and obtaining a sixth sight line elevation difference between the second target station and the third elevation point by using a measuring device installed at the second target station; According to the fifth sight line elevation difference and the first sight line elevation difference, a third elevation difference between the first elevation point and the third elevation point is obtained, and according to the sixth sight line elevation difference and the third sight line elevation difference, a fourth elevation difference between the first elevation point and the third elevation point is obtained; Acquire a fifth elevation difference between the fifth sight line elevation difference and the second sight line elevation difference, and a sixth elevation difference between the sixth sight line elevation difference and the fourth sight line elevation difference; The third elevation value of the third elevation point is obtained according to the first elevation value, the first elevation difference, the second elevation difference, the third elevation difference, the fourth elevation difference, the fifth elevation difference and the sixth elevation difference.

2. The method according to claim 1, characterized in that The method further comprises: Determine a plurality of elevation points to be measured, and divide the plurality of elevation points to be measured into a plurality of groups to be measured; For each group to be measured, the elevation points to be measured in the group to be measured are respectively determined as a first elevation point, a second elevation point, and a third elevation point.

3. The method according to claim 2, characterized in that In two adjacent groups to be measured, some of the elevation points to be measured in the former group to be measured are the same as some of the elevation points to be measured in the latter group to be measured.

4. The method according to claim 1, characterized in that: Among a first sight distance between the first target station and a first elevation point, a second sight distance between the first target station and the second elevation point, and a third sight distance between the first target station and a third elevation point, a first sight distance difference between any two sight distances is less than or equal to a preset sight distance difference threshold; Among the fourth sight distance between the second target station and the first elevation point, the fifth sight distance between the second target station and the second elevation point, and the sixth sight distance between the second target station and the third elevation point, a second sight distance difference between any two sight distances is less than or equal to a preset sight distance difference threshold.

5. The method according to claim 1, characterized in that: The measuring equipment located at the first target survey station and the first elevation point, the second elevation point, and the third elevation point are all in a line of sight state; The surveying equipment located at the second target survey station and the first elevation point, the second elevation point, and the third elevation point are all in a line-of-sight state.

6. The method according to claim 1, characterized in that The step of obtaining a third elevation value of the third elevation point according to the first elevation value, the first elevation difference, the second elevation difference, the third elevation difference, the fourth elevation difference, the fifth elevation difference and the sixth elevation difference comprises: Obtaining a first average value between the third elevation difference and the fourth elevation difference; The first elevation value and the first average value are summed to obtain a first initial elevation value of a third elevation point; Obtaining a second average value between the fifth elevation difference and the sixth elevation difference, and a third average value between the first elevation difference and the second elevation difference; The first elevation value, the second average value, and the third average value are summed to obtain a second initial elevation value of a third elevation point; A fourth average value of the first initial elevation value and the second initial elevation value is obtained, and the fourth average value is determined as a third elevation value of the third elevation point.

7. The method according to claim 6, characterized in that The step of obtaining a fourth average value of the first initial elevation value and the second initial elevation value, and determining the fourth average value as the third elevation value of the third elevation point, comprises: Determine the difference between the first initial elevation value and the second initial elevation value as the line figure closure difference; If the line graph closure difference is less than or equal to the line graph closure difference threshold, a fourth average value of the first initial elevation value and the second initial elevation value is obtained, and the fourth average value is determined as the third elevation value of the third elevation point.

8. The method according to claim 7, characterized in that After determining the difference between the first initial elevation value and the second initial elevation value as the line figure closure difference, the method further includes: If the line graph closure difference is greater than the line graph closure difference threshold, then re-enter the step of obtaining the fifth sight line elevation difference between the first target station and the third elevation point by using the measuring equipment set up at the first target station, and obtaining the sixth sight line elevation difference between the second target station and the third elevation point by using the measuring equipment set up at the second target station, so as to obtain a new first initial elevation value and a new second initial elevation value, and determine the difference between the new first initial elevation value and the new second initial elevation value as a new line graph closure difference, until the new line graph closure difference is less than or equal to the line graph closure difference threshold; A new fourth average value of the first initial elevation value and the second initial elevation value is obtained, and the new fourth average value is determined as the third elevation value of the third elevation point.

9. The method according to claim 1, characterized in that: The obtaining, according to the first elevation value, the first elevation difference and the second elevation difference, the second elevation value of the second elevation point comprises: Obtaining a difference between the first elevation difference and the second elevation difference; If the difference between the first elevation difference and the second elevation difference is less than or equal to an elevation difference threshold, the second elevation value of the second elevation point is obtained according to the first elevation value, the first elevation difference and the second elevation difference.

10. The method according to claim 9, characterized in that After obtaining the difference between the first elevation difference and the second elevation difference, the method further includes: If the difference between the first elevation difference and the second elevation difference is greater than the elevation difference threshold, re-entering the step of obtaining the first sight elevation difference between the first target station and the first elevation point, and the second sight elevation difference between the first target station and the second elevation point by means of the measuring device set up at the first target station, so as to obtain a new first elevation difference and a new second elevation difference, until the new difference between the new first elevation difference and the new second elevation difference is less than or equal to the elevation difference threshold; The second elevation value of the second elevation point is obtained according to the first elevation value, the new first elevation difference and the new second elevation difference.

11. The method according to claim 1, characterized in that: Obtaining a second elevation value of the second elevation point according to the first elevation value, the first elevation difference, and the second elevation difference includes: Obtaining a third average value between the first elevation difference and the second elevation difference; The first elevation value and the third average value are summed to obtain the second elevation value.

12. A precision trigonometric height measuring device, characterized in that: include: A first acquisition module is used to acquire a first sight elevation difference between the first target station and a first elevation point, and a second sight elevation difference between the first target station and a second elevation point by using a measurement device set up at the first target station; The first elevation point has a first elevation value; A second acquisition module is used to acquire a third sight line elevation difference between the second target station and the first elevation point, and a fourth sight line elevation difference between the second target station and the second elevation point by using a measurement device set up at the second target station; a third acquisition module, configured to acquire a first elevation difference between the second elevation point and the first elevation point according to the second sight line elevation difference and the first sight line elevation difference, and to acquire a second elevation difference between the second elevation point and the first elevation point according to the fourth sight line elevation difference and the third sight line elevation difference; a fourth acquisition module, configured to obtain a second elevation value of the second elevation point according to the first elevation value, the first elevation difference and the second elevation difference; a sixth acquisition module, configured to acquire a fifth sight line elevation difference between the first target station and a third elevation point by using a measurement device installed at the first target station, and to acquire a sixth sight line elevation difference between the second target station and the third elevation point by using a measurement device installed at the second target station; a seventh acquisition module, configured to acquire a third elevation difference between the first elevation point and the third elevation point according to the fifth sight line elevation difference and the first sight line elevation difference, and to acquire a fourth elevation difference between the first elevation point and the third elevation point according to the sixth sight line elevation difference and the third sight line elevation difference; A first acquisition submodule, used for acquiring a fifth elevation difference between the fifth sight line elevation difference and the second sight line elevation difference, and a sixth elevation difference between the sixth sight line elevation difference and the fourth sight line elevation difference; The second acquisition submodule is used to obtain the third elevation value of the third elevation point according to the first elevation value, the first elevation difference, the second elevation difference, the third elevation difference, the fourth elevation difference, the fifth elevation difference and the sixth elevation difference.

13. A precision trigonometric height measurement system, characterized in that: The system includes a measuring device and a data processing module; The measuring device is used to obtain a first sight elevation difference between a first target measuring station and a first elevation point, and a second sight elevation difference between the first target measuring station and a second elevation point; the first elevation point has a first elevation value; The surveying device is further used to obtain a third sight line elevation difference between the second target survey station and the first elevation point, and a fourth sight line elevation difference between the second target survey station and the second elevation point; The data processing module is used to obtain a first elevation difference between the second elevation point and the first elevation point according to the second sight line elevation difference and the first sight line elevation difference, and to obtain a second elevation difference between the second elevation point and the first elevation point according to the fourth sight line elevation difference and the third sight line elevation difference; The data processing module is further used to obtain a second elevation value of the second elevation point according to the first elevation value, the first elevation difference and the second elevation difference; The measuring device is further used to obtain a fifth sight line elevation difference between the first target station and a third elevation point through the measuring device set up at the first target station, and to obtain a sixth sight line elevation difference between the second target station and the third elevation point through the measuring device set up at the second target station; The data processing module is further used to obtain a third elevation difference between the first elevation point and the third elevation point according to the fifth sight line elevation difference and the first sight line elevation difference, and to obtain a fourth elevation difference between the first elevation point and the third elevation point according to the sixth sight line elevation difference and the third sight line elevation difference; Acquire a fifth elevation difference between the fifth sight line elevation difference and the second sight line elevation difference, and a sixth elevation difference between the sixth sight line elevation difference and the fourth sight line elevation difference; The third elevation value of the third elevation point is obtained according to the first elevation value, the first elevation difference, the second elevation difference, the third elevation difference, the fourth elevation difference, the fifth elevation difference and the sixth elevation difference.

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