A GNSS deformation monitoring method and device for eliminating temperature influence

Abstract

The present invention provides a GNSS deformation monitoring method and device for eliminating temperature influence. For GNSS monitoring stations installed on the same building, and using the same reference station, after calculating the coordinate values ​​of the monitoring stations, the result values ​​at the same time are used to calculate the horizontal distance and height difference between the monitoring stations, so as to monitor the deformation. This method can solve the influence of systematic deviation caused by temperature in GNSS deformation monitoring and improve the accuracy of monitoring.

Description

Technical Field

[0001] The present invention relates to the field of deformation monitoring technology, and in particular to a GNSS deformation monitoring method and device for eliminating temperature influence. Background Art

[0002] GNSS (Global Navigation Satellite System) technology has the characteristics of real-time, high precision and all-weather, and is widely used in real-time three-dimensional deformation monitoring of houses, bridges, slopes, etc. Continuous real-time deformation sequence is also a prerequisite for successful deformation monitoring and early warning.

[0003] In terms of the specific technology of GNSS deformation monitoring, relative positioning technology is mainly used to calculate the baseline changes between each monitoring station and the reference station, and then calculate the coordinates of the monitoring station in combination with the known coordinates of the reference station. Therefore, a stable reference station is the basis of GNSS deformation monitoring, so in actual engineering construction, the reference station is generally installed in a stable position nearby to ensure that it is firm and immovable.

[0004] However, natural temperature changes are uncontrollable, and different media and different media sizes are affected by temperature in completely different ways, so the temperature changes at the base station and the monitoring station cannot be considered the same. For example, during the Spring Festival or autumn, the temperature difference can reach more than 10 degrees in a day, and the length change of steel is about 0.003 meters, which has caused systematic deviations in deformation monitoring of houses or bridges.

[0005] Therefore, how to solve the influence of systematic deviation caused by temperature in GNSS deformation monitoring has become an urgent problem to be solved. Summary of the invention

[0006] The present invention aims to provide a GNSS deformation monitoring method and device for eliminating temperature influence, which overcomes the above problems or at least partially solves the above problems.

[0007] To achieve the above object, the technical solution of the present invention is specifically implemented as follows:

[0008] One aspect of the present invention provides a GNSS deformation monitoring method for eliminating temperature influence, comprising:

[0009] Obtaining a first coordinate value of a first GNSS monitoring point and a second coordinate value of a second GNSS monitoring point, wherein the first GNSS monitoring point and the second GNSS monitoring point are installed on the same structure and use the same reference station, the distance between the first GNSS monitoring point and the reference station does not exceed a preset value, and the distance between the second GNSS monitoring point and the reference station does not exceed the preset value;

[0010] Calculating the horizontal distance and height difference between the first GNSS monitoring point and the second GNSS monitoring point at the same time;

[0011] Calculating an initial value of a horizontal distance and an initial value of a height difference between the first GNSS monitoring point and the second GNSS monitoring point;

[0012] Calculate a monitoring value of a horizontal distance and a monitoring value of a height difference between the first GNSS monitoring point and the second GNSS monitoring point at a preset time;

[0013] Deformation monitoring is judged based on the initial value of the horizontal distance and the initial value of the height difference and the monitored value of the horizontal distance and the monitored value of the height difference.

[0014] Optionally, the calculating of an initial value of a horizontal distance and an initial value of a height difference between the first GNSS monitoring point and the second GNSS monitoring point comprises:

[0015] The initial value of the horizontal distance and the initial value of the height difference between the first GNSS monitoring point and the second GNSS monitoring point are calculated using the following formula:

[0016]

[0017] in, is the initial value of the horizontal distance, is the initial value of the height difference, represents the coordinate value of the first monitoring point in the E direction at time i, Indicates the N-direction coordinate value of the first monitoring point at time i, Indicates the U-direction coordinate value of the first monitoring point at time i, represents the coordinate value of the second monitoring point in the E direction at time i, represents the N-direction coordinate value of the second monitoring point at time i, It represents the U direction coordinate value of the second monitoring point at time i, and M is a preset value.

[0018] Optionally, the determination of deformation monitoring based on the initial value of the horizontal distance and the initial value of the height difference and the monitored value of the horizontal distance and the monitored value of the height difference includes:

[0019] The difference between the monitored value of the horizontal distance and the initial value of the horizontal distance is calculated using the following formula, and the difference between the monitored value of the height difference and the initial value of the height difference is calculated:

[0020]

[0021]

[0022] in, is the difference between the monitored value of the horizontal distance and the initial value of the horizontal distance, is the difference between the monitored value of the high difference and the initial value of the high difference, The preset time.

[0023] Deformation monitoring is performed according to a difference between the monitored value of the horizontal distance and the initial value of the horizontal distance, or a difference between the monitored value of the height difference and the initial value of the height difference.

[0024] Optionally, the performing deformation monitoring according to the difference between the monitored value of the horizontal distance and the initial value of the horizontal distance, or the difference between the monitored value of the height difference and the initial value of the height difference comprises:

[0025] If the preset condition is met, it is determined that the first monitoring point and the second monitoring point have actually deformed;

[0026] The preset conditions include: The first preset value or .

[0027] Optionally, M=100, the first preset value is 5 mm, and the second preset value is 10 mm.

[0028] Another aspect of the present invention provides a GNSS deformation monitoring device for eliminating temperature influence, comprising:

[0029] an acquisition module, configured to acquire a first coordinate value of a first GNSS monitoring point and a second coordinate value of a second GNSS monitoring point, wherein the first GNSS monitoring point and the second GNSS monitoring point are installed on the same structure and use the same reference station, the distance between the first GNSS monitoring point and the reference station does not exceed a preset value, and the distance between the second GNSS monitoring point and the reference station does not exceed the preset value;

[0030] A calculation module, used to calculate the horizontal distance and the height difference between the first GNSS monitoring point and the second GNSS monitoring point at the same time; calculate the initial value of the horizontal distance and the initial value of the height difference between the first GNSS monitoring point and the second GNSS monitoring point; calculate the monitoring value of the horizontal distance and the monitoring value of the height difference between the first GNSS monitoring point and the second GNSS monitoring point at a preset time;

[0031] A judgment module is used to make a judgment on deformation monitoring according to the initial value of the horizontal distance and the initial value of the height difference and the monitoring value of the horizontal distance and the monitoring value of the height difference.

[0032] Optionally, the calculation module calculates an initial value of a horizontal distance and an initial value of a height difference between the first GNSS monitoring point and the second GNSS monitoring point in the following manner:

[0033] The initial value of the horizontal distance and the initial value of the height difference between the first GNSS monitoring point and the second GNSS monitoring point are calculated using the following formula:

[0034]

[0035]

[0036] in, is the initial value of the horizontal distance, is the initial value of the height difference, represents the coordinate value of the first monitoring point in the E direction at time i, Indicates the N-direction coordinate value of the first monitoring point at time i, Indicates the U-direction coordinate value of the first monitoring point at time i, represents the coordinate value of the second monitoring point in the E direction at time i, represents the N-direction coordinate value of the second monitoring point at time i, It represents the U direction coordinate value of the second monitoring point at time i, and M is a preset value.

[0037] Optionally, the judgment module performs deformation monitoring judgment according to the initial value of the horizontal distance and the initial value of the height difference and the monitored value of the horizontal distance and the monitored value of the height difference in the following manner:

[0038] The difference between the monitored value of the horizontal distance and the initial value of the horizontal distance is calculated using the following formula, and the difference between the monitored value of the height difference and the initial value of the height difference is calculated:

[0039]

[0040]

[0041] in, is the difference between the monitored value of the horizontal distance and the initial value of the horizontal distance, is the difference between the monitored value of the high difference and the initial value of the high difference, The preset time.

[0042] Deformation monitoring is performed according to a difference between the monitored value of the horizontal distance and the initial value of the horizontal distance, or a difference between the monitored value of the height difference and the initial value of the height difference.

[0043] Optionally, the judgment module performs deformation monitoring according to the difference between the monitored value of the horizontal distance and the initial value of the horizontal distance, or the difference between the monitored value of the height difference and the initial value of the height difference in the following manner:

[0044] If the preset condition is met, it is determined that the first monitoring point and the second monitoring point have actually deformed;

[0045] The preset conditions include: The first preset value or .

[0046] Optionally, M=100, the first preset value is 5 mm, and the second preset value is 10 mm.

[0047] It can be seen that the GNSS deformation monitoring method and device for eliminating temperature influence provided by the present invention, for GNSS monitoring stations installed on the same building, and using the same reference station, after calculating the coordinate values ​​of the monitoring stations, the result values ​​at the same time are used to calculate the horizontal distance and height difference between the monitoring stations, so as to monitor the deformation, which can solve the influence of systematic deviation caused by temperature in GNSS deformation monitoring and improve the accuracy of monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0049] Figure 1 A flow chart of a GNSS deformation monitoring method for eliminating temperature effects provided by an embodiment of the present invention;

[0050] Figure 2 A specific flow chart of a GNSS deformation monitoring method for eliminating temperature influence provided by an embodiment of the present invention;

[0051] Figure 3 A schematic structural diagram of a GNSS deformation monitoring device for eliminating temperature influence provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0052] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0053] Figure 1 The flowchart of the GNSS deformation monitoring method for eliminating temperature influence provided by an embodiment of the present invention is shown. Figure 2 A specific flow chart of a GNSS deformation monitoring method for eliminating temperature influence provided by an embodiment of the present invention is shown, see Figure 1 and Figure 2 The GNSS deformation monitoring method for eliminating temperature influence provided by an embodiment of the present invention includes:

[0054] S1, obtaining a first coordinate value of a first GNSS monitoring point and a second coordinate value of a second GNSS monitoring point, wherein the first GNSS monitoring point and the second GNSS monitoring point are installed on the same structure and use the same reference station, a distance between the first GNSS monitoring point and the reference station does not exceed a preset value, and a distance between the second GNSS monitoring point and the reference station does not exceed a preset value.

[0055] Specifically, the GNSS monitoring stations (also called monitoring stations or monitoring points) installed on the same building of the present invention use the same reference station (also called reference station or reference point), and the straight-line distance between the reference station and the monitoring station does not exceed 10 km.

[0056] The present invention is based on the precise relative positioning technology of satellite carrier phase observation values, uses at least two GNSS receivers as monitoring points, and performs double difference calculations based on the satellite carrier phase observation values ​​obtained by simultaneous observation of the monitoring point and the reference point equipment, and finally uses the combined observation values ​​to solve the baseline vector between the monitoring point and the reference point, and then combines the known coordinates of the reference station to obtain the coordinate value of the monitoring point. After the present invention is processed by relative positioning solution of GNSS (such as China's Beidou system), the ENU coordinate values ​​of each monitoring station are obtained, wherein the station center coordinate system usually takes the position point P carried by the user as the coordinate origin (in Beidou deformation monitoring, the reference station position is taken as the origin), and the three coordinate axes are mutually perpendicular east, north and celestial (or zenith), so the station center coordinate system is also called the northeast celestial (ENU) coordinate system, and the coordinate values ​​of the point are represented by E (east), N (north), and U (zenith) respectively.

[0057] Of course, in the present invention, more than two GNSS monitoring points can be set in a deformation monitoring system, which is not specifically limited in the present invention. As long as any two monitoring points comply with the monitoring method of the present invention, they should fall within the protection scope of the present invention.

[0058] S2, calculating the horizontal distance and height difference between the first GNSS monitoring point and the second GNSS monitoring point at the same time;

[0059] S3, calculating an initial value of a horizontal distance and an initial value of a height difference between the first GNSS monitoring point and the second GNSS monitoring point.

[0060] As an optional implementation of the embodiment of the present invention, calculating the initial value of the horizontal distance and the initial value of the height difference between the first GNSS monitoring point and the second GNSS monitoring point includes:

[0061] The initial value of the horizontal distance and the initial value of the height difference between the first GNSS monitoring point and the second GNSS monitoring point are calculated using the following formula:

[0062]

[0063]

[0064] in, is the initial value of the horizontal distance, is the initial value of the height difference, represents the coordinate value of the first monitoring point in the E direction at time i, Indicates the N-direction coordinate value of the first monitoring point at time i, Indicates the U-direction coordinate value of the first monitoring point at time i, represents the coordinate value of the second monitoring point in the E direction at time i, represents the N-direction coordinate value of the second monitoring point at time i, It represents the U direction coordinate value of the second monitoring point at time i, and M is a preset value.

[0065] Specifically, the present invention takes monitoring points 1 and 2 as examples and adopts The arithmetic mean of the results at the time and the subsequent 100 times is taken as the initial value of the horizontal distance and the initial value of the height difference between the two points, respectively calculated as and The calculation formula is as follows, where Indicates the coordinate value of the E direction of monitoring point 1 at time i, Indicates the N-direction coordinate value of monitoring point 1 at time i, Indicates the U direction coordinate value of monitoring point 1 at time i.

[0066]

[0067]

[0068] S4, calculating a monitoring value of a horizontal distance and a monitoring value of a height difference between a first GNSS monitoring point and a second GNSS monitoring point at a preset time;

[0069] S5, making a judgment on deformation monitoring according to the initial value of the horizontal distance and the initial value of the height difference and the monitored value of the horizontal distance and the monitored value of the height difference.

[0070] As an optional implementation of the embodiment of the present invention, the determination of deformation monitoring based on the initial value of the horizontal distance and the initial value of the height difference and the monitored value of the horizontal distance and the monitored value of the height difference includes:

[0071] The following formula is used to calculate the difference between the monitored value of the horizontal distance and the initial value of the horizontal distance, and the difference between the monitored value of the height difference and the initial value of the height difference:

[0072]

[0073]

[0074] in, is the difference between the monitored value of the horizontal distance and the initial value of the horizontal distance, is the difference between the monitored value of the high difference and the initial value of the high difference, The preset time.

[0075] Deformation monitoring is performed based on the difference between the monitored value of the horizontal distance and the initial value of the horizontal distance, or the difference between the monitored value of the height difference and the initial value of the height difference.

[0076] The deformation monitoring based on the difference between the monitored value of the horizontal distance and the initial value of the horizontal distance, or the difference between the monitored value of the height difference and the initial value of the height difference includes:

[0077] If the preset conditions are met, it is determined that the first monitoring point and the second monitoring point have actually deformed;

[0078] The pre-conditions include: The first preset value or .

[0079] Specifically, the horizontal distance and height difference between the two monitoring stations at any time after the present invention and the initial value are calculated as and , the calculation formula is as follows,

[0080] (Formula 1)

[0081] (Formula 2)

[0082] Because they are installed on the same building object (such as the roof of a house), use the same installation medium, and use the same reference station, they are affected by temperature in a very consistent manner, resulting in consistent coordinate offsets.

[0083] The calculation of the distance between two points is essentially a relative relationship. If the two monitoring sites themselves do not undergo actual deformation and are only affected by temperature, then the horizontal distance and height difference between them should be basically consistent with those obtained by the initial calculation.

[0084] Therefore, the present invention makes the following judgment (judgment method 1): 5mm or 10mm, it is judged that actual deformation has occurred between the two points, and the above method is continued. , , Calculation and judgment are performed separately, that is, the horizontal distance difference and height difference between these two points and the remaining points on the building are judged. As long as the horizontal distance difference and height difference between one of the points and the remaining points also meet the above conditions, it is judged that the point has indeed undergone actual deformation.

[0085] In summary, the processing method of the prior art is that each monitoring point uses these coordinate values ​​generated at a certain time interval to directly and independently analyze and judge the difference between these coordinate values ​​and the initial fixed value set at the monitoring point to judge the deformation size and risk. However, in actual work, only the influence of temperature will cause actual changes of different amplitudes in the reference site and the monitoring site itself, resulting in large fluctuations in the data itself, and it is impossible to judge whether these deformations are risk deformations caused by stress in the building itself or normal changes in thermal expansion and contraction caused by temperature, which affects the result analysis. Therefore, the present invention is aimed at GNSS monitoring sites (for example: monitoring point 1, monitoring point 2 and monitoring point n) installed on the same building, and uses the same reference site. After calculating their coordinate values, these monitoring sites use the result values ​​at the same time to calculate the horizontal distance and height difference between the monitoring sites, so as to monitor the deformation, which can solve the influence of systematic deviation caused by temperature in GNSS deformation monitoring and improve the accuracy of monitoring.

[0086] It can be seen that the GNSS deformation monitoring method for eliminating temperature influence provided by the embodiment of the present invention is for GNSS monitoring stations installed on the same structure, and uses the same reference station. After calculating the coordinate values ​​of the monitoring stations, the result values ​​at the same time are used to calculate the horizontal distance and height difference between the monitoring stations, so as to monitor the deformation. This can solve the influence of systematic deviation caused by temperature in GNSS deformation monitoring and improve the accuracy of monitoring.

[0087] Figure 3 The schematic diagram of the structure of the GNSS deformation monitoring device for eliminating the temperature influence provided by an embodiment of the present invention is shown. The GNSS deformation monitoring device for eliminating the temperature influence applies the above method. The following is only a brief description of the structure of the GNSS deformation monitoring device for eliminating the temperature influence. For other matters not covered, please refer to the relevant description in the above GNSS deformation monitoring method for eliminating the temperature influence. Figure 3 , the GNSS deformation monitoring device for eliminating temperature influence provided by an embodiment of the present invention comprises:

[0088] an acquisition module, configured to acquire a first coordinate value of a first GNSS monitoring point and a second coordinate value of a second GNSS monitoring point, wherein the first GNSS monitoring point and the second GNSS monitoring point are installed on the same structure and use the same reference station, the distance between the first GNSS monitoring point and the reference station does not exceed a preset value, and the distance between the second GNSS monitoring point and the reference station does not exceed a preset value;

[0089] A calculation module, used to calculate the horizontal distance and the height difference between the first GNSS monitoring point and the second GNSS monitoring point at the same time; calculate the initial value of the horizontal distance and the initial value of the height difference between the first GNSS monitoring point and the second GNSS monitoring point; calculate the monitoring value of the horizontal distance and the monitoring value of the height difference between the first GNSS monitoring point and the second GNSS monitoring point at a preset time;

[0090] The judgment module is used to judge the deformation monitoring according to the initial value of the horizontal distance and the initial value of the height difference and the monitoring value of the horizontal distance and the monitoring value of the height difference.

[0091] As an optional implementation of the embodiment of the present invention, the calculation module calculates the initial value of the horizontal distance and the initial value of the height difference between the first GNSS monitoring point and the second GNSS monitoring point in the following manner:

[0092] The initial value of the horizontal distance and the initial value of the height difference between the first GNSS monitoring point and the second GNSS monitoring point are calculated using the following formula:

[0093]

[0094]

[0095] in, is the initial value of the horizontal distance, is the initial value of the height difference, represents the coordinate value of the first monitoring point in the E direction at time i, Indicates the N-direction coordinate value of the first monitoring point at time i, Indicates the U-direction coordinate value of the first monitoring point at time i, represents the coordinate value of the second monitoring point in the E direction at time i, represents the N-direction coordinate value of the second monitoring point at time i, It represents the U direction coordinate value of the second monitoring point at time i, and M is a preset value.

[0096] As an optional implementation of the embodiment of the present invention, the judgment module performs deformation monitoring judgment according to the initial value of the horizontal distance and the initial value of the height difference and the monitoring value of the horizontal distance and the monitoring value of the height difference in the following manner:

[0097] The following formula is used to calculate the difference between the monitored value of the horizontal distance and the initial value of the horizontal distance, and the difference between the monitored value of the height difference and the initial value of the height difference:

[0098]

[0099]

[0100] in, is the difference between the monitored value of the horizontal distance and the initial value of the horizontal distance, is the difference between the monitored value of the high difference and the initial value of the high difference, The preset time.

[0101] Deformation monitoring is performed based on the difference between the monitored value of the horizontal distance and the initial value of the horizontal distance, or the difference between the monitored value of the height difference and the initial value of the height difference.

[0102] As an optional implementation of the embodiment of the present invention, the judgment module performs deformation monitoring according to the difference between the monitored value of the horizontal distance and the initial value of the horizontal distance, or the difference between the monitored value of the height difference and the initial value of the height difference in the following manner:

[0103] If the preset conditions are met, it is determined that the first monitoring point and the second monitoring point have actually deformed;

[0104] The pre-conditions include: The first preset value or .

[0105] As an optional implementation of the embodiment of the present invention, M=100, the first preset value is 5 mm, and the second preset value is 10 mm.

[0106] It can be seen that the GNSS deformation monitoring device for eliminating temperature influence provided by the embodiment of the present invention is for GNSS monitoring stations installed on the same structure. After calculating the coordinate values ​​of the monitoring stations, the result values ​​at the same time are used to calculate the horizontal distance and height difference between the monitoring stations, thereby monitoring the deformation. This can solve the influence of systematic deviation caused by temperature in GNSS deformation monitoring and improve the accuracy of monitoring.

[0107] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included within the scope of the claims of the present application.

Claims

1. A GNSS deformation monitoring method for eliminating temperature influence, characterized in that: include: Obtaining a first coordinate value of a first GNSS monitoring point and a second coordinate value of a second GNSS monitoring point, wherein the first GNSS monitoring point and the second GNSS monitoring point are installed on the same structure and use the same reference station, the distance between the first GNSS monitoring point and the reference station does not exceed a preset value, and the distance between the second GNSS monitoring point and the reference station does not exceed the preset value; Calculating the horizontal distance and height difference between the first GNSS monitoring point and the second GNSS monitoring point at the same time; Calculating an initial value of a horizontal distance and an initial value of a height difference between the first GNSS monitoring point and the second GNSS monitoring point; Calculate a monitoring value of a horizontal distance and a monitoring value of a height difference between the first GNSS monitoring point and the second GNSS monitoring point at a preset time; Deformation monitoring is judged according to the initial value of the horizontal distance and the initial value of the height difference and the monitored value of the horizontal distance and the monitored value of the height difference; in: The calculating of the initial value of the horizontal distance and the initial value of the height difference between the first GNSS monitoring point and the second GNSS monitoring point comprises: The initial value of the horizontal distance and the initial value of the height difference between the first GNSS monitoring point and the second GNSS monitoring point are calculated using the following formula: in, is the initial value of the horizontal distance, is the initial value of the height difference, represents the coordinate value of the first monitoring point in the E direction at time i, Indicates the N-direction coordinate value of the first monitoring point at time i, Indicates the U-direction coordinate value of the first monitoring point at time i, represents the coordinate value of the second monitoring point in the E direction at time i, represents the N-direction coordinate value of the second monitoring point at time i, represents the U direction coordinate value of the second monitoring point at time i, where M is a preset value; The determination of deformation monitoring based on the initial value of the horizontal distance and the initial value of the height difference and the monitored value of the horizontal distance and the monitored value of the height difference includes: The difference between the monitored value of the horizontal distance and the initial value of the horizontal distance is calculated using the following formula, and the difference between the monitored value of the height difference and the initial value of the height difference is calculated: in, is the difference between the monitored value of the horizontal distance and the initial value of the horizontal distance, is the difference between the monitored value of the high difference and the initial value of the high difference, For preset time; Deformation monitoring is performed according to a difference between the monitored value of the horizontal distance and the initial value of the horizontal distance, or a difference between the monitored value of the height difference and the initial value of the height difference.

2. The method according to claim 1, characterized in that The performing deformation monitoring according to the difference between the monitored value of the horizontal distance and the initial value of the horizontal distance, or the difference between the monitored value of the height difference and the initial value of the height difference comprises: If the preset condition is met, it is determined that the first monitoring point and the second monitoring point have actually deformed; The preset conditions include: The first preset value or .

3. The method according to claim 2, characterized in that The M=100, the first preset value is 5 mm, and the second preset value is 10 mm.

4. A GNSS deformation monitoring device that eliminates temperature effects, characterized in that: include: an acquisition module, configured to acquire a first coordinate value of a first GNSS monitoring point and a second coordinate value of a second GNSS monitoring point, wherein the first GNSS monitoring point and the second GNSS monitoring point are installed on the same structure and use the same reference station, the distance between the first GNSS monitoring point and the reference station does not exceed a preset value, and the distance between the second GNSS monitoring point and the reference station does not exceed the preset value; A calculation module, used to calculate the horizontal distance and the height difference between the first GNSS monitoring point and the second GNSS monitoring point at the same time; calculate the initial value of the horizontal distance and the initial value of the height difference between the first GNSS monitoring point and the second GNSS monitoring point; calculate the monitoring value of the horizontal distance and the monitoring value of the height difference between the first GNSS monitoring point and the second GNSS monitoring point at a preset time; A judgment module, used for judging deformation monitoring according to the initial value of the horizontal distance and the initial value of the height difference and the monitoring value of the horizontal distance and the monitoring value of the height difference; in: The calculation module calculates an initial value of the horizontal distance and an initial value of the height difference between the first GNSS monitoring point and the second GNSS monitoring point in the following manner: The initial value of the horizontal distance and the initial value of the height difference between the first GNSS monitoring point and the second GNSS monitoring point are calculated using the following formula: in, is the initial value of the horizontal distance, is the initial value of the height difference, represents the coordinate value of the first monitoring point in the E direction at time i, Indicates the N-direction coordinate value of the first monitoring point at time i, Indicates the U-direction coordinate value of the first monitoring point at time i, represents the coordinate value of the second monitoring point in the E direction at time i, represents the N-direction coordinate value of the second monitoring point at time i, represents the U direction coordinate value of the second monitoring point at time i, where M is a preset value; The judgment module performs deformation monitoring judgment according to the initial value of the horizontal distance and the initial value of the height difference and the monitoring value of the horizontal distance and the monitoring value of the height difference in the following manner: The difference between the monitored value of the horizontal distance and the initial value of the horizontal distance is calculated using the following formula, and the difference between the monitored value of the height difference and the initial value of the height difference is calculated: in, is the difference between the monitored value of the horizontal distance and the initial value of the horizontal distance, is the difference between the monitored value of the high difference and the initial value of the high difference, For preset time; Deformation monitoring is performed according to a difference between the monitored value of the horizontal distance and the initial value of the horizontal distance, or a difference between the monitored value of the height difference and the initial value of the height difference.

5. The device according to claim 4, characterized in that The judgment module performs deformation monitoring according to the difference between the monitored value of the horizontal distance and the initial value of the horizontal distance, or the difference between the monitored value of the height difference and the initial value of the height difference in the following manner: If the preset condition is met, it is determined that the first monitoring point and the second monitoring point have actually deformed; The preset conditions include: The first preset value or .

6. The device according to claim 5, characterized in that The M=100, the first preset value is 5 mm, and the second preset value is 10 mm.

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