Triangulation elevation measurement method and system

Abstract

The invention belongs to the technical field of ranging triangulation elevation measurement, and particularly relates to a triangulation elevation measurement method and system. The triangulated elevation measurement method comprises the following steps: S1, determining the position of a point A to be measured, the position of a reference point B and the position of a turning point C; s2, adjusting and determining the sight line levelness of the reference point B and the sight line levelness of the turning point C; s3, constructing at least two observation stations, wherein each corresponding observation station is used for collecting data of the corresponding reference point B and data of the corresponding turning point C; s4, acquiring a height difference between the reference point B and the turning point C according to the data of the corresponding reference point B and the data of the corresponding turning point C; and S5, according to the height difference between the reference point B and the turning point C, obtaining the height difference between the to-be-measured point A and the turning point C. The method can be suitable for benchmark joint measurement under the difficult conditions of short distance and large height difference, and the related operation steps are relatively simple, so that the test accuracy is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of ranging trigonometric height measurement, and in particular relates to a trigonometric height measurement method and system. Background Art

[0002] Leveling is a traditional method of elevation transfer. It has a simple principle but reliable results. It is one of the main technical means for maintaining surveying and mapping benchmarks. Surveying and mapping benchmarks are important infrastructure for national economy, social development, national security and informatization construction. They provide reference benchmarks for precise positioning in many fields of national economic development and construction, such as geology, space science, oceanography, meteorology, environmental science, and resource development. Urban development is inseparable from the maintenance of surveying and mapping benchmarks. All kinds of engineering construction, including real estate development, rail transit, municipal pipelines, water conservancy projects, etc., need to use urban surveying and mapping benchmarks as references. The three-dimensional control network is an important part of the modern surveying and mapping benchmark. The control network points have both plane coordinates and elevation information, which provide support for the establishment of regional quasi-geoid refinement models and CORS.

[0003] However, the establishment of a three-dimensional control network requires an open environment, a stable foundation, and a distance from the signal transmission tower to avoid damage due to construction in the short term. These conditions determine that in modern cities, it is difficult to establish the points of the three-dimensional control network, and they can only be selected on the roof of the building or even the top of the stairwell. It is difficult to measure the second-class level at the points on the roof of the building. Using traditional leveling methods is time-consuming and labor-intensive, and the test accuracy is poor. Summary of the invention

[0004] The purpose of the present invention is to provide a trigonometric height measurement method to solve any of the above-mentioned technical problems in view of the deficiencies in the prior art.

[0005] In order to achieve the above object, the present invention adopts the following technical solution:

[0006] A trigonometric height measurement method comprises the following steps:

[0007] S1, determine the position of the test point A, the position of the reference point B and the position of the turning point C;

[0008] S2. Adjust and determine the sight level of reference point B and the sight level of turning point C;

[0009] S3, construct at least two observation stations, each corresponding observation station is used for collecting data of the corresponding reference point B and the corresponding turning point C;

[0010] S4, obtaining the height difference between the reference point B and the turning point C according to the data of the corresponding reference point B and the data of the corresponding turning point C;

[0011] S5. According to the height difference between the reference point B and the turning point C, obtain the height difference between the measured point A and the turning point C.

[0012] Preferably, the step of determining the position of the measured point A, the position of the reference point B and the position of the turning point C comprises:

[0013] Select the stairwell on the top floor of the building as the location of the test point A;

[0014] Select the bottom surface of the building as the location of the reference point B for joint measurement;

[0015] The platform where the stairwell on the top floor of the building is located and the position adjacent to the point A to be measured is selected as the turning point C.

[0016] Preferably, the step of adjusting and determining the sight level of the reference point B and the sight level of the turning point C comprises:

[0017] The first fixed prism device on the reference point B and the first testing prism device on the turning point C are leveled to ensure that the height of the collection end of the first fixed prism device is consistent with the height of the collection end of the first testing prism device.

[0018] Preferably, the step of constructing at least two observation stations, each corresponding observation station being used for collecting data of a corresponding reference point B and a corresponding turning point C, comprises:

[0019] Constructing a first observation station D and a second observation station P so that the distance between the second fixed prism device on the first observation station and the first fixed prism device is a first preset distance value, and the distance between the second test prism device on the second observation station and the first test prism device is a second preset distance value;

[0020] After the second fixed prism device on the first observation station D collects and obtains the data of the first fixed prism device; the second fixed prism device on the first observation station D collects and obtains the data of the first test prism device;

[0021] After the second test prism device on the second observation station P collects and obtains the data of the first test prism device, the second test prism device on the second observation station P is driven to collect and obtain the data of the first fixed prism device 1.

[0022] Preferably, the step of obtaining the height difference between the reference point B and the turning point C according to the data of the corresponding reference point B and the data of the corresponding turning point C comprises:

[0023] When observing prism points B and C at ground station D, the height difference between points B and C can be obtained.

[0024]

[0025] Where S is the slant distance; α is the vertical angle; i is the instrument height; V is the prism height; D is the horizontal distance; when ground station D observes B, and the heights are equal, the spherical aberration can be ignored. The height difference between B and C is obtained by subtracting the height difference between B and C observed by station D.

[0026]

[0027] Similarly, by subtracting the height difference between B and C observed by station P on the roof, we can obtain the height difference between A and D.

[0028]

[0029] When observations are made simultaneously between stations D and P, the refractive indexes of C observed by the ground station D and B observed by the rooftop station P are approximately equal, so the average of formulas (3) and (4) is obtained:

[0030]

[0031] Preferably, the step of obtaining the height difference between the measured point A and the turning point C according to the height difference between the reference point B and the turning point C comprises:

[0032] After obtaining the height difference between the reference point B and the turning point C, the elevation is transferred from the turning point C to the measured point A using the second-class leveling method using a level.

[0033] Preferably, after obtaining the height difference between the reference point B and the turning point C, the step of transferring the elevation from the turning point C to the point to be measured A by a second-class leveling method using a level meter comprises the following:

[0034] A first leveling rod is added at the position of the turning point C, and the first leveling rod is vertically installed through a first tripod;

[0035] A second leveling rod is added between the position of the turning point C and the point to be measured A; and the second leveling rod is vertically installed through a second tripod;

[0036] A third leveling rod 55 is added at the position of the measuring point A; and the third leveling rod 55 is vertically installed by a third tripod;

[0037] A third test prism device is added between the first leveling ruler and the second leveling ruler; and the second leveling ruler is vertically installed through a fourth tripod; and the third test prism device obtains the height data of the first leveling ruler and the second leveling ruler respectively;

[0038] A fourth test prism device is added between the second leveling scale and the third leveling scale; and is vertically installed through a fifth tripod; and the fourth test prism device obtains height data of the second leveling scale and the third leveling scale respectively.

[0039] The present invention also discloses a trigonometric height measurement system for executing the trigonometric height measurement method described above; the trigonometric height measurement system comprises a first fixed prism device, a first test prism device, a second fixed prism device, a second test prism device and a leveling device; the first fixed prism device is used to be assembled to the position of a reference point B; the first test prism device is used to be assembled to the position of a turning point C; the second fixed prism device is arranged adjacent to the first fixed prism device, and a first preset distance value is set between the second fixed prism device and the first fixed prism device; and the second fixed prism device is used to collect the second fixed prism The device is used to collect height difference data between the second test prism device and the first fixed prism device, and height difference data between the second fixed prism device and the first test prism device; the second test prism device, the first test prism device and the leveling measuring device are on the same installation platform; and a second preset distance value is set between the second test prism device and the first test prism device; and the second test prism device is used to collect height difference data between the second test prism device and the first test prism device, and height difference data between the second test prism device and the first fixed prism device; the leveling measuring device is used to be set between the position of the turning point C and the position of the point A to be measured.

[0040] Preferably, the first preset distance value is 20-40 m; the second preset distance value is 20-40 m.

[0041] Preferably, the leveling measuring device comprises a first leveling rod, a third test prism device, a second leveling rod, a fourth test prism device and a third leveling rod; the first leveling rod is used to be assembled to the position of the turning point C; and a first tripod is provided at the bottom of the first leveling rod; the second leveling rod is used to be assembled between the position of the turning point C and the position of the point A to be measured; and a second tripod is provided at the bottom of the second leveling rod; the third leveling rod is used to be assembled to the position of the point A to be measured; and a third tripod is provided at the bottom of the third leveling rod; the third test prism device is arranged between the first leveling rod and the second leveling rod; and a fourth tripod is provided at the bottom of the test prism device; the fourth test prism device is arranged between the second leveling rod and the third leveling rod; and a fifth tripod is provided at the bottom of the fourth test prism device;

[0042] Wherein, the height of the fifth tripod is greater than the height of the third tripod; the height of the third tripod is greater than the height of the fourth tripod;

[0043] Furthermore, the height h3 of the fifth tripod is less than or equal to 4 m; the height h2 of the third tripod and the height h1 of the fourth tripod are both less than or equal to 1.8 m.

[0044] The beneficial effect of the present invention lies in that the technical solution first determines the position of the test point A, the position of the reference point B and the position of the turning point C to achieve the relatively difficult elevation transfer of the distance position, which is conducive to achieving the accuracy requirements of the second-class leveling measurement and ensuring the accuracy of the subsequent measurement; then adjust and determine the line of sight level of the reference point B and the line of sight level of the turning point C to determine that the parameters such as the level of the selected measuring component reach the specified value, avoiding the error of the measuring component itself and affecting the overall test result; then construct at least two observation stations, each corresponding observation station is used for data collection of the corresponding reference point B and the corresponding turning point C, and the height difference between the reference point B and the turning point C is obtained according to the data of the corresponding reference point B and the corresponding turning point C, so as to obtain the height difference between the reference point B and the turning point C; finally, according to the height difference between the reference point B and the turning point C, the height difference between the test point A and the turning point C is obtained, so that it can be applied to the joint measurement of leveling points under difficult conditions of short distance and large height difference, and the operation steps involved are relatively simple, thereby improving the accuracy of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The following will refer to the attached Figures 1 to 3 To describe the features, advantages and technical effects of exemplary embodiments of the present invention.

[0046] Figure 1 A flow chart of a trigonometric height measurement method according to an embodiment of the present invention;

[0047] Figure 2 A schematic diagram of the structure of a trigonometric height measurement system according to an embodiment of the present invention;

[0048] Figure 3 The figure is a schematic structural diagram of a trigonometric height measurement system according to an embodiment of the present invention.

[0049] In the figure: 1-first fixed prism device; 2-first test prism device; 3-second fixed prism device; 4-second test prism device; 5-leveling measurement device; 51-first leveling rod; 52-third test prism device; 53-second leveling rod; 54-fourth test prism device; 55-third leveling rod. DETAILED DESCRIPTION

[0050] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0051] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0052] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0053] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and multiple situations exist alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0054] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0055] The following is combined with Figure 1 to Figure 3 The present invention is further described in detail, but is not intended to limit the present invention.

[0056] like Figure 1 As shown, in one embodiment of the present invention, the trigonometric height measurement method comprises the following steps:

[0057] S1, determine the position of the test point A, the position of the reference point B and the position of the turning point C;

[0058] S2. Adjust and determine the sight level of reference point B and the sight level of turning point C;

[0059] S3, construct at least two observation stations, each corresponding observation station is used for collecting data of the corresponding reference point B and the corresponding turning point C;

[0060] S4, obtaining the height difference between the reference point B and the turning point C according to the data of the corresponding reference point B and the data of the corresponding turning point C;

[0061] S5. According to the height difference between the reference point B and the turning point C, obtain the height difference between the measured point A and the turning point C.

[0062] The technical solution of the present invention first determines the position of the test point A, the position of the reference point B and the position of the turning point C, so as to realize the relatively difficult elevation transfer of the distance position, which is conducive to achieving the accuracy requirements of the second-class leveling measurement and ensuring the accuracy of the subsequent measurement; then adjust and determine the line of sight level of the reference point B and the line of sight level of the turning point C, so as to determine that the parameters such as the levelness of the selected measuring component reach the specified value, and avoid the error of the measuring component itself affecting the overall test result; then construct at least two observation stations, each corresponding observation station is used for the data collection of the corresponding reference point B and the corresponding turning point C, and the height difference between the reference point B and the turning point C is obtained according to the data of the corresponding reference point B and the corresponding turning point C, so as to obtain the height difference between the reference point B and the turning point C; finally, according to the height difference between the reference point B and the turning point C, the height difference between the test point A and the turning point C is obtained, so that it can be suitable for the joint measurement of leveling points under the difficult conditions of short distance and large height difference, and the operation steps involved are relatively simple, thereby improving the accuracy of the test.

[0063] Specifically, in some embodiments, in S1, the step of determining the position of the measured point A, the position of the reference point B, and the position of the turning point C includes:

[0064] Select the stairwell on the top floor of the building as the location of the test point A;

[0065] Select the bottom surface of the building as the location of the reference point B for joint measurement;

[0066] The platform where the stairwell on the top floor of the building is located and the position adjacent to the measured point A is selected as the turning point C. That is to say, the top of the stairwell of a high-rise building is selected as the measured point A, and the turning point C that can only reach the rooftop platform through stairs and the ground second-class leveling route have been connected to the reference point B near the ground, so as to solve the elevation transfer under the difficult conditions of short distance and large height difference in similar environments at the top of the building, and achieve the accuracy requirements of second-class leveling measurement.

[0067] Specifically, in some embodiments, in S2, the step of adjusting and determining the sight level of the reference point B and the sight level of the turning point C includes:

[0068] The first fixed prism device 1 on the reference point B and the first test prism device 2 on the turning point C are leveled to achieve the same height between the acquisition end of the first fixed prism device 1 and the acquisition end of the first test prism device 2. The first fixed prism device 1 and the first test prism device 2 are placed in a flat location, and then leveled using a total station, and the eyepiece sight is adjusted to be basically horizontal; at the same time, a fixed measuring station is set within 20 meters around the instrument to measure whether the heights of the two sets of prism devices are consistent. If the measured height difference is in the sub-millimeter level, it is considered that the heights of the two sets of prism groups are consistent; otherwise, the prism device should be calibrated.

[0069] Specifically, in some embodiments, in S3, the step of constructing at least two observation stations, each corresponding observation station being used for collecting data of a corresponding reference point B and a corresponding turning point C, includes:

[0070] Construct a first observation station D and a second observation station P so that the distance between the second fixed prism device 3 and the first fixed prism device 1 on the first observation station is a first preset distance value, and the distance between the second test prism device 4 and the first test prism device 2 on the second observation station is a second preset distance value; wherein the first preset distance value uses a horizontal distance of 20 to 40 meters; the second preset distance value uses a horizontal distance of 20 to 40 meters; that is, the distance between the ground and rooftop stations and the prism is generally 20 to 40 meters, which can better meet the accuracy of the observation and collection data;

[0071] After the second fixed prism device 3 on the first observation station D collects and obtains the data of the first fixed prism device 1; the second fixed prism device 3 on the first observation station D collects and obtains the data of the first test prism device 2; wherein the second fixed prism device 3 is a second total station;

[0072] After the second test prism device 4 on the second observation station P collects and obtains the data of the first test prism device 2, the second test prism device 4 on the second observation station P is driven to collect and obtain the data of the first fixed prism device 1. The second test prism device 4 is a second test total station.

[0073] That is, the second fixed prism device 3 on the first observation station first collects data at a relatively close distance, and then the total station eyepiece is reversed 180° to obtain data from the first test prism device 2 at a relatively long distance;

[0074] The second test prism device 4 first collects data from the first test prism device 2 at a relatively short distance, and then inverts the total station eyepiece 180° to obtain data from the first fixed prism device 1 at a relatively long distance; and according to the above process, after completing and recording the readings of the first half of the measurement, the ground station and the platform station exchange instruments. According to the same procedure, the readings of the second half of the measurement are completed and recorded. According to the above procedure, a total of eight measurement records are completed.

[0075] Specifically, in some embodiments, in S4, the step of obtaining the height difference between the reference point B and the turning point C according to the data of the corresponding reference point B and the data of the corresponding turning point C includes:

[0076] When observing prism points B and C at ground station D, the height difference between points B and C can be obtained.

[0077]

[0078] Where S is the slant distance; α is the vertical angle; i is the instrument height; V is the prism height; D is the horizontal distance; when ground station D observes B, and the heights are equal, the spherical aberration can be ignored. The height difference between B and C is obtained by subtracting the height difference between B and C observed by station D.

[0079]

[0080] Similarly, by subtracting the height difference between B and C observed by station P on the roof, we can obtain the height difference between A and D.

[0081]

[0082] When observations are made simultaneously between stations D and P, the refractive indexes of C observed by the ground station D and B observed by the rooftop station P are approximately equal, so the average of formulas 3 and 4 gives

[0083]

[0084] Specifically, in some embodiments, in S5, the step of obtaining the height difference between the measured point A and the turning point C according to the height difference between the reference point B and the turning point C includes:

[0085] After obtaining the height difference between the reference point B and the turning point C, the elevation is transferred from the turning point C to the measured point A using the second-class leveling method using a level.

[0086] Specifically, in some embodiments, after obtaining the height difference between the reference point B and the turning point C, the step of transferring the elevation from the turning point C to the point to be measured A by using a level through a second-class leveling method includes the following:

[0087] A first leveling rod 51 is added at the position of the turning point C, and the first leveling rod 51 is vertically installed through a first tripod;

[0088] A second leveling rod 53 is provided between the position of the turning point C and the measuring point A; and the second leveling rod 53 is vertically installed by a second tripod;

[0089] A third leveling rod 55 is added at the position of the measuring point A; and the third leveling rod 55 is vertically installed by a third tripod;

[0090] A third test prism device 52 is added between the first leveling scale 51 and the second leveling scale 53; and the second leveling scale 53 is vertically installed through a fourth tripod; and the third test prism device 52 obtains the height data of the first leveling scale 51 and the second leveling scale 53 respectively;

[0091] A fourth test prism device 54 is added between the second leveling scale 53 and the third leveling scale 55; and it is installed vertically through the fifth tripod; and the fourth test prism device 54 obtains the height data of the second leveling scale 53 and the third leveling scale 55 respectively. Among them, the height of the fifth tripod is greater than the height of the third tripod; the height of the third tripod is greater than the fourth tripod; further, the height h3 of the fifth tripod is 4m; the height h2 of the third tripod and the height h1 of the fourth tripod are respectively less than or equal to 1.8m. In other words, a 4-meter freely retractable high tripod (the retractable part is the lower fixed rod and the upper fixed rod that can be threadedly connected to the lower fixed rod) is customized, breaking through the restriction that the ordinary tripod can be raised to a maximum of 1.8 meters, thereby transferring the elevation from the building platform to the top of the stairwell, saving costs and improving work efficiency.

[0092] The present invention also proposes a trigonometric height measurement system, which is used to perform a trigonometric height measurement method. The specific method of the trigonometric height measurement method refers to the above embodiment. Since the second subject adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here. Figure 2 and 3As shown, the trigonometric height measurement system includes a first fixed prism device 1, a first test prism device 2, a second fixed prism device 3, a second test prism device 4 and a leveling device 5; the first fixed prism device 1 is used to be assembled to the position of the reference point B; the first test prism device 2 is used to be assembled to the position of the turning point C; the second fixed prism device 3 is arranged adjacent to the first fixed prism device 1, and a first preset distance value is set between the second fixed prism device 3 and the first fixed prism device 1; and the second fixed prism device 3 is used to collect the height between the second fixed prism device 3 and the first fixed prism device 1 The second test prism device 4, the first test prism device 2 and the leveling device 5 are on the same installation platform; and a second preset distance value is set between the second test prism device 4 and the first test prism device 2; and the second test prism device 4 is used to collect the height difference data between the second test prism device 4 and the first test prism device 2 and the height difference data between the second test prism device 4 and the first fixed prism device 1; the leveling device 5 is used to be set between the position of the turning point C and the position of the point A to be measured.

[0093] Specifically, in some embodiments, the first preset distance value is 20-40m; the second preset distance value is 20-40m. That is to say, the distance between the ground and rooftop stations and the prism is generally 20-40m, which can better meet the accuracy of observation and collection data.

[0094] Specifically, in some embodiments, Figure 3As shown, the leveling measuring device 5 includes a first leveling rod 51, a third test prism device 52, a second leveling rod 53, a fourth test prism device 54 and a third leveling rod 55; the first leveling rod 51 is used to be assembled to the position of the turning point C; and a first tripod is provided at the bottom of the first leveling rod 51; the second leveling rod 53 is used to be assembled between the position of the turning point C and the position of the point A to be measured; and a second tripod is provided at the bottom of the second leveling rod 53; the third leveling rod 55 is used to be assembled to the position of the point A to be measured; and a third tripod is provided at the bottom of the third leveling rod 55; The test prism device 52 is arranged between the first leveling scale 51 and the second leveling scale 53; and a fourth tripod is arranged at the bottom of the test prism device 52; the fourth test prism device 54 is arranged between the second leveling scale 53 and the third leveling scale 55; and a fifth tripod is arranged at the bottom of the fourth test prism device 54; wherein the height of the fifth tripod is greater than the height of the third tripod; the height of the third tripod is greater than the fourth tripod; further, the height h3 of the fifth tripod is less than or equal to 4m; the height h2 of the third tripod and the height h1 of the fourth tripod are respectively less than or equal to 1.8m. In other words, a 4-meter freely retractable high tripod (the retractable part is the lower fixed rod and the upper fixed rod that can be threadedly connected to the lower fixed rod) is customized, breaking through the restriction that the ordinary tripod can be raised to a maximum of 1.8 meters, thereby transferring the elevation from the building platform to the top of the stairwell, saving costs and improving work efficiency.

[0095] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode includes only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0096] According to the disclosure and teaching of the above description, those skilled in the art to which the present invention belongs can also change and modify the above embodiment. Therefore, the present invention is not limited to the above specific embodiment, and any obvious improvement, replacement or modification made by those skilled in the art on the basis of the present invention belongs to the protection scope of the present invention. In addition, although some specific terms are used in this specification, these terms are only for the convenience of description and do not constitute any limitation to the present invention.

Claims

1. A trigonometric height measurement method, characterized in that: The following steps are involved: S1, determine the position of the test point A, the position of the reference point B and the position of the turning point C; S2. Adjust and determine the sight level of reference point B and the sight level of turning point C; S3, construct at least two observation stations, each corresponding observation station is used for collecting data of the corresponding reference point B and the corresponding turning point C; S4, obtaining the height difference between the reference point B and the turning point C according to the data of the corresponding reference point B and the data of the corresponding turning point C; S5. According to the height difference between the reference point B and the turning point C, obtain the height difference between the measured point A and the turning point C.

2. The trigonometric height measurement method according to claim 1, characterized in that: The step of determining the position of the measured point A, the position of the reference point B and the position of the turning point C comprises: Select the stairwell on the top floor of the building as the location of the test point A; Select the bottom surface of the building as the location of the reference point B for joint measurement; The platform where the stairwell on the top floor of the building is located and the position adjacent to the point A to be measured is selected as the turning point C.

3. The trigonometric height measurement method according to claim 1, characterized in that: The step of adjusting and determining the sight level of the reference point B and the sight level of the turning point C comprises: The first fixed prism device on the reference point B and the first testing prism device on the turning point C are leveled to ensure that the height of the collection end of the first fixed prism device is consistent with the height of the collection end of the first testing prism device.

4. The trigonometric height measurement method according to claim 3, characterized in that: The step of constructing at least two observation stations, each corresponding observation station being used for collecting data of a corresponding reference point B and a corresponding turning point C, comprises: Constructing a first observation station D and a second observation station P so that the distance between the second fixed prism device on the first observation station and the first fixed prism device is a first preset distance value, and the distance between the second test prism device on the second observation station and the first test prism device is a second preset distance value; After the second fixed prism device on the first observation station D collects and obtains the data of the first fixed prism device; the second fixed prism device on the first observation station D collects and obtains the data of the first test prism device; After the second test prism device on the second observation station P collects and obtains the data of the first test prism device, the second test prism device on the second observation station P is driven to collect and obtain the data of the first fixed prism device 1.

5. The trigonometric height measurement method according to claim 4, characterized in that: The step of obtaining the height difference between the reference point B and the turning point C according to the corresponding data of the reference point B and the corresponding data of the turning point C comprises: When observing prism points B and C at ground station D, the height difference between points B and C can be obtained. Where S is the slant distance; α is the vertical angle; i is the instrument height; V is the prism height; D is the horizontal distance; when ground station D observes B, and the heights are equal, the spherical aberration can be ignored; the height difference between B and C is obtained by subtracting the height difference between B and C observed by station D; Similarly, by subtracting the height difference between B and C observed by the rooftop station P, we can get the height difference between A and D. When observations are made simultaneously between stations D and P, the refractive indexes of C observed by the ground station D and B observed by the rooftop station P are approximately equal, so the average of formulas (3) and (4) is obtained:

6. The trigonometric height measurement method according to claim 1, characterized in that: The step of obtaining the height difference between the measured point A and the turning point C according to the height difference between the reference point B and the turning point C comprises: After obtaining the height difference between the reference point B and the turning point C, the elevation is transferred from the turning point C to the measured point A using the second-class leveling method using a level.

7. The trigonometric height measurement method according to claim 6, characterized in that: After obtaining the height difference between the reference point B and the turning point C, the step of using a level to transfer the elevation from the turning point C to the point to be measured A by a second-class leveling method includes the following: A first leveling rod is added at the position of the turning point C, and the first leveling rod is vertically installed through a first tripod; A second leveling rod is added between the position of the turning point C and the point to be measured A; and the second leveling rod is vertically installed through a second tripod; A third leveling rod 55 is added at the position of the measuring point A; and the third leveling rod 55 is vertically installed by a third tripod; A third test prism device is added between the first leveling ruler and the second leveling ruler; and the second leveling ruler is vertically installed through a fourth tripod; and the third test prism device obtains the height data of the first leveling ruler and the second leveling ruler respectively; A fourth test prism device is added between the second leveling scale and the third leveling scale; and is vertically installed through a fifth tripod; and the fourth test prism device obtains height data of the second leveling scale and the third leveling scale respectively.

8. A trigonometric height measurement system, characterized in that: Used to execute the trigonometric height measurement method described in any one of claims 1 to 7 above; the trigonometric height measurement system includes a first fixed prism device, a first test prism device, a second fixed prism device, a second test prism device and a leveling device; the first fixed prism device is used to be assembled to the position of a reference point B; the first test prism device is used to be assembled to the position of a turning point C; the second fixed prism device is arranged adjacent to the first fixed prism device, and a first preset distance value is set between the second fixed prism device and the first fixed prism device; and the second fixed prism device is used to collect the second fixed prism device and the first fixed prism device. The invention relates to a level measuring device for measuring the height difference between a first test prism device and a second test prism device, and a level measuring device for measuring the height difference between a second fixed prism device and a first test prism device; the second test prism device, the first test prism device and the level measuring device are on the same installation platform; and a second preset distance value is set between the second test prism device and the first test prism device; and the second test prism device is used to collect the height difference data between the second test prism device and the first test prism device, and the height difference data between the second test prism device and the first fixed prism device; the level measuring device is used to be set between the position of the turning point C and the position of the point A to be measured.

9. The trigonometric height measurement system according to claim 8, characterized in that: The first preset distance value is 20-40m; the second preset distance value is 20-40m.

10. The trigonometric height measurement system according to claim 8, characterized in that: The leveling measuring device comprises a first leveling rod, a third test prism device, a second leveling rod, a fourth test prism device and a third leveling rod; the first leveling rod is used to be assembled to the position of the turning point C; and a first tripod is provided at the bottom of the first leveling rod; the second leveling rod is used to be assembled between the position of the turning point C and the position of the point A to be measured; and a second tripod is provided at the bottom of the second leveling rod; the third leveling rod is used to be assembled to the position of the point A to be measured; and a third tripod is provided at the bottom of the third leveling rod; the third test prism device is arranged between the first leveling rod and the second leveling rod; and a fourth tripod is provided at the bottom of the test prism device; the fourth test prism device is arranged between the second leveling rod and the third leveling rod; and a fifth tripod is provided at the bottom of the fourth test prism device; Wherein, the height of the fifth tripod is greater than the height of the third tripod; the height of the third tripod is greater than the height of the fourth tripod; Furthermore, the height h3 of the fifth tripod is less than or equal to 4 m; the height h2 of the third tripod and the height h1 of the fourth tripod are both less than or equal to 1.8 m.

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