Monitoring datum point device

Abstract

The utility model belongs to the technical field of deformation monitoring, and discloses a datum point monitoring device. Comprising a first mounting column, a GNSS receiver and a first measuring instrument; the first mounting column is arranged at a monitoring reference point; the GNSS receiver and the first measuring instrument are vertically and coaxially arranged on the first mounting column; the GNSS receiver is located above the first measuring instrument. According to the utility model, the GNSS receiver and the first measuring instrument which are coaxially aligned in the vertical direction are arranged on the first mounting column, a GNSS technology and a measuring robot technology can be combined, data of the GNSS technology and data of the measuring robot technology are integrated, whether a reference measured by the first measuring instrument displaces or not can be judged by utilizing the GNSS technology, and the accuracy of measurement is improved. The GNSS data result can be optimized by using the measurement data of the first measurement instrument, and the accuracy of the monitoring data is ensured.

Description

Technical Field

[0001] The utility model discloses a monitoring reference point device, belonging to the technical field of deformation monitoring. Background Art

[0002] Deformation monitoring is to use special instruments and methods to continuously observe the deformation phenomenon of the measured object, analyze the deformation of the measured object and predict the deformation development trend of the measured object. If the deformation of the measured object can be accurately monitored and its deformation development trend can be predicted, relevant measures and countermeasures can be taken as early as possible to minimize the losses caused by the disaster. However, a reliable deformation monitoring result must first be supported by a stable and reliable monitoring reference point.

[0003] At present, in the field of deformation monitoring, measurement robot observation technology or GNSS (Global Navigation Satellite System) observation technology is generally used to realize the automation of surface deformation monitoring of the measured object. However, the measurement robot observation technology cannot know whether the established monitoring reference point has shifted, which affects the authenticity of the deformation of the measured object. GNSS observation technology generally calibrates the monitoring reference point in GNSS observation technology by joint measurement with national or local reference stations, but its measurement accuracy is low, reliability is poor, and it is easily affected by weather and environment.

[0004] In the prior art, surveying robot observation technology and GNSS observation technology usually respectively set up monitoring reference devices at different monitoring reference points, which results in the monitoring data obtained being separated from each other and unable to be coordinated and verified, resulting in insufficient accuracy of the monitoring reference and inconvenience in use. Utility Model Content

[0005] The utility model overcomes the shortcomings of the prior art and proposes a device for monitoring reference points, comprising a first mounting column, a GNSS receiver and a first measuring instrument;

[0006] The first mounting column is arranged at a monitoring reference point;

[0007] The GNSS receiver and the first measuring instrument are vertically coaxially arranged on the first mounting column;

[0008] The GNSS receiver is located above the first measuring instrument.

[0009] Preferably, it also includes a coaxial mounting frame;

[0010] The coaxial mounting bracket is arranged at the top end of the first mounting column;

[0011] The GNSS receiver and the first measuring instrument are arranged on the coaxial mounting frame.

[0012] Preferably, the coaxial mounting frame specifically comprises an upper plate and a lower plate arranged in parallel;

[0013] A plurality of support rods are arranged between the upper plate and the lower plate, and a receiving space is formed between the upper plate and the lower plate;

[0014] The GNSS receiver is arranged at the center of the upper surface of the upper plate;

[0015] The first measuring instrument is arranged at the center of the upper surface of the lower plate and is located in the accommodating space.

[0016] Preferably, the coaxial mounting frame further comprises a mounting rod;

[0017] The mounting rod is arranged at the center of the upper surface of the lower plate;

[0018] The first measuring instrument is rotatably arranged on the mounting rod.

[0019] Preferably, it also includes a second mounting column and a second measuring instrument;

[0020] The second mounting column is arranged on the monitoring reference point and is horizontally spaced apart from the first mounting column;

[0021] The second measuring instrument is arranged on the top end of the second mounting column.

[0022] Preferably, the first measuring instrument is a total station or a prism;

[0023] The second measuring instrument is a total station or a prism.

[0024] Preferably, the first mounting column and the second mounting column are arranged on the same mounting base.

[0025] Preferably, the installation height of the second measuring instrument is smaller than the installation height of the GNSS receiver.

[0026] Preferably, the monitoring reference point device further comprises a first forced centering disk;

[0027] The first forced centering disk is disposed between the coaxial mounting bracket and the first mounting post.

[0028] Preferably, the monitoring reference point device further includes a power supply device;

[0029] The power supply device is arranged on the first mounting column;

[0030] The power supply device is connected to the GNSS receiver.

[0031] Beneficial effect: The utility model can combine GNSS technology with measurement robot technology by arranging a GNSS receiver and a first measuring instrument in a vertically coaxially aligned manner on a first mounting column, so that the data of the two can be integrated, and then the GNSS technology can be used to determine whether the reference measured by the first measuring instrument has been displaced. The measurement data of the first measuring instrument can be used to optimize the GNSS data results and ensure the accuracy of the monitoring data.

[0032] The first mounting column and the second mounting column are both arranged on the mounting base, and the second measuring instrument is arranged on the second mounting column, and the second measuring instrument and the first measuring instrument are arranged at intervals in the horizontal direction. In this way, the second measuring instrument can be used to monitor another reference point, so that the reference point monitoring device can monitor two different reference points at the same time, and then by mutually checking the monitoring data of the two reference points, it is accurately determined whether the reference point has been displaced, thereby improving the measurement accuracy.

[0033] Making the height of the first mounting column higher than the height of the second mounting column can prevent the GNSS receiver from being blocked, improve the stability of GNSS data, and thus improve the accuracy of actual benchmark measurement and the convenience of data verification. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic diagram of the overall structure of the second embodiment of the present utility model;

[0035] Figure 2 This is a schematic diagram of the coaxial mounting frame structure of the second embodiment of the utility model;

[0036] Figure 3 It is a top view schematic diagram of the bottom flange in the second embodiment of the utility model;

[0037] Figure 4 This is a workflow diagram of Embodiment 2 of the present utility model.

[0038] In the figure: 1. mounting base; 2. first mounting column; 3. second mounting column; 31. transverse stirrups; 32. vertical longitudinal reinforcement; 4. coaxial mounting frame; 41. upper plate; 42. lower plate; 43. support rod; 44. mounting rod; 45. connecting bolt; 46. positioning adjustment bolt; 5. first forced centering plate; 6. second forced centering plate; 7. GNSS receiver; 8. first measuring instrument; 9. second measuring instrument; 10. power supply device; 101. solar panel; 102. battery junction box; 11. solar mounting bracket; 111. first mounting frame; 112. second mounting frame; 12. bottom flange; 13. screw rod; 14. triangle iron; 15. steel pipe base; 16. support plate; 17. casting template for mounting base; 18. casting template for second mounting column; 19. level mark; 20. concrete; 21. lightning rod. DETAILED DESCRIPTION

[0039] In the following description, specific details such as specific system structures and technologies are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present invention. However, it should be clear to those skilled in the art that the present invention can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems and devices are omitted to avoid unnecessary details that hinder the description of the present invention.

[0040] The preferred technical solution of the utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0041] Embodiment 1:

[0042] like Figure 1 As shown, a monitoring reference point device includes a first mounting column, a GNSS receiver and a first measuring instrument; the first mounting column is arranged at the monitoring reference point; the GNSS receiver and the first measuring instrument are vertically coaxially arranged on the first mounting column; and the GNSS receiver is located above the first measuring instrument.

[0043] Specifically, Figure 1 As shown, in one embodiment, the monitoring reference point device includes a first mounting column, which is vertically fixed at a preset position as the monitoring reference point, and a GNSS receiver and a first measuring instrument are arranged on the first mounting column. The GNSS receiver and the first measuring instrument are located on the same vertical axis, and their plane coordinates are consistent; the GNSS technology and the measuring robot technology can be combined to integrate the data of the two, and then the GNSS technology can be used to determine whether the reference measured by the first measuring instrument is displaced, and the measurement data of the first measuring instrument can be used to optimize the GNSS data results and ensure the accuracy of the monitoring data. To ensure that the GNSS receiver is not blocked, the GNSS receiver is located above the first measuring instrument.

[0044] It should be understood that in the present invention, the GNSS receiver and the first measuring instrument may be located on the same vertical axis as the first mounting column, or may not be located on the same vertical axis as the first mounting column. Specifically, in this embodiment, the GNSS receiver and the first measuring instrument may be located on the same vertical axis as the first mounting column, and the GNSS receiver and the first measuring instrument are arranged at the top of the first mounting column.

[0045] Furthermore, it also includes a second mounting column and a second measuring instrument; the second mounting column is arranged on the monitoring reference point and is arranged horizontally spaced from the first mounting column; the second measuring instrument is arranged at the top of the second mounting column. Specifically, in order to obtain the monitoring data of another monitoring reference point so that the monitoring reference point can be mutually verified with it, the utility model also includes a second mounting column and a second measuring instrument, the second measuring instrument is arranged on the second mounting column and is arranged horizontally spaced from the first measuring instrument, and is used to detect another reference point, so that the automatic maintenance device for the detection reference can monitor two different reference points at the same time, and then accurately judge whether the reference point is displaced by mutually verifying the monitoring data of the two reference points, thereby improving the measurement accuracy.

[0046] Furthermore, the first mounting column and the second mounting column are arranged on the same mounting base.

[0047] Specifically, in this embodiment, the first mounting column and the second mounting column are arranged on the same mounting base, which is convenient for the layout of the reference points. At the same time, the accuracy of the mutual verification of the two reference points is improved, and different degrees of deformation of the first mounting column and the second mounting column at the same reference point are avoided, which affects the verification accuracy.

[0048] Furthermore, it also includes a coaxial mounting frame; the coaxial mounting frame is arranged on the top of the first mounting column; the GNSS receiver and the first measuring instrument are arranged on the coaxial mounting frame.

[0049] Furthermore, the coaxial mounting frame specifically includes an upper plate and a lower plate arranged in parallel; a plurality of support rods are arranged between the upper plate and the lower plate, and a receiving space is formed between the upper plate and the lower plate; the GNSS receiver is arranged at the center of the upper surface of the upper plate; the first measuring instrument is arranged at the center of the upper surface of the lower plate, located in the receiving space.

[0050] Furthermore, the coaxial mounting frame also includes a mounting rod; the mounting rod is arranged at the center of the upper surface of the lower plate; and the first measuring instrument is rotatably arranged on the mounting rod.

[0051] Specifically, in this embodiment, in order to quickly and conveniently mount the GNSS receiver and the first measuring instrument, a coaxial mounting frame is further provided at the top of the first mounting column, and the GNSS receiver and the first measuring instrument are arranged on the coaxial mounting frame. Specifically, the coaxial mounting frame includes an upper plate and a lower plate arranged in parallel, a plurality of support rods are arranged between the upper plate and the lower plate, and the plurality of support rods are arranged at non-centers of the upper plate and the lower plate, the GNSS receiver is arranged at the center of the upper surface of the upper plate, and the first measuring instrument is rotatably arranged on the mounting rod at the center of the upper surface of the lower plate, and is located in the accommodation space formed between the upper plate and the lower plate.

[0052] Furthermore, the first measuring instrument is a total station or a prism; the second measuring instrument is a total station or a prism.

[0053] Specifically, in this embodiment, the first measuring instrument is a prism, and the second measuring instrument is a total station.

[0054] Furthermore, the installation height of the second measuring instrument is smaller than the installation height of the GNSS receiver.

[0055] Specifically, in this embodiment, in order to prevent the GNSS receiver from being blocked and affecting its signal reception, the installation height of the second measuring instrument is smaller than the installation height of the GNSS receiver.

[0056] Furthermore, the device for monitoring reference points also includes a first forced centering disk; the first forced centering disk is arranged between the coaxial mounting frame and the first mounting column.

[0057] Specifically, in this embodiment, in order to facilitate the adjustment of the level of the lower plate and thereby ensure the level of the first measuring instrument arranged on the lower plate, a first forced centering plate is also arranged on the first mounting column, and the first forced centering plate is arranged between the coaxial mounting frame and the first mounting column.

[0058] Furthermore, the device for monitoring reference points also includes a power supply device; the power supply device is arranged on the first mounting column; and the power supply device is connected to the GNSS receiver.

[0059] Specifically, the present embodiment further includes a power supply device, which is used to supply power to the GNSS receiver and also to supply power to the first measuring instrument and / or the second measuring instrument.

[0060] The preferred technical solution of the utility model is further described below in conjunction with the accompanying drawings and Example 2.

[0061] Embodiment 2:

[0062] refer to Figures 1 to 4 ,like Figure 1 As shown, in this embodiment, the mounting base 1 and the second mounting column 3 are an integrated structure cast by concrete 20, and a level mark 19 is cast on the upper end surface of the mounting base 1. Specifically, transverse stirrups 31 and vertical longitudinal bars 32 are arranged alternately inside the second mounting column 3, and a plurality of transverse stirrups 31 are arranged at intervals along the vertical direction. A transverse stirrup 31 is also arranged inside the mounting base 1, and the vertical longitudinal bars 32 of the second mounting column 3 extend to the position of the transverse stirrup 31 inside the mounting base 1, and all transverse stirrups 31 are fixed on the vertical longitudinal bars 32. In this way, the structural strength of the mounting base 1 and the second mounting column 3 can be improved by the transverse stirrups 31 and the vertical longitudinal bars 32, thereby ensuring the stability and monitoring accuracy of the monitoring reference automatic maintenance device.

[0063] In this embodiment, if Figure 1As shown, the first mounting column 2 is a steel pipe structure, and its bottom is a steel pipe base 15, on which a support plate 16 is arranged, and a mounting cavity adapted to the steel pipe body is arranged at the position of the mounting base 1 corresponding to the first mounting column 2, and the steel pipe base 15 is located in the mounting cavity and the support plate 16 is supported on the mounting base 1. A plurality of triangle irons 14 arranged at intervals along the circumferential direction are arranged between the support plate 16 and the steel pipe body to improve the supporting strength of the steel pipe.

[0064] like Figure 1 , 3 As shown, a bottom flange 12 is provided at a position corresponding to the first mounting column 2 at the lower part of the mounting base 1, a mounting hole corresponding to the flange hole of the bottom flange 12 is provided on the support plate 16, and a through hole connecting the mounting hole and the flange hole is provided on the mounting base 1. A screw 13 is passed through the through hole, and the screw 13 passes through the mounting hole, the through hole and the flange hole on the support plate 16 from top to bottom, and the lower end of the screw 13 is fixed on the bottom flange 12, and a gasket is provided between the screw 13 and the support plate 16. In this way, the bottom flange 12 can be cast inside the mounting base 1, and the first mounting column 2 is fixed to the bottom flange 12 by the screw 13 passing through the inside of the mounting base 1, which can ensure that the first mounting column 2 is firmly and reliably fixed to the mounting base 1, thereby improving the stability of the first mounting column 2.

[0065] In actual construction, Figure 1 As shown, the outline is constructed using the template of the mounting base 1 and the template of the second mounting column 3, and then the first mounting column 2, the bottom flange 12 and the screw 13 are arranged, and then concrete 20 is poured to form the mounting base 1 and the second mounting column 3. In this way, the first mounting column 2, the bottom flange 12 and the screw 13 can also be cast and fixed at the same time to improve stability.

[0066] In this embodiment, if Figure 1 As shown, a GNSS receiver 7 and a first measuring instrument 8 are arranged on the top of the first mounting column 2, and the GNSS receiver 7 and the first measuring instrument 8 are aligned in the vertical direction. In this embodiment, the first measuring instrument 8 is a prism, and a first forced centering plate 5 is welded and fixedly installed on the upper end of the first mounting column 2, and a coaxial mounting frame 4 is arranged on the upper end of the first forced centering plate 5, and the GNSS receiver 7 and the first measuring instrument 8 are aligned in the vertical direction through the coaxial mounting frame 4.

[0067] Specifically, Figure 2As shown, the coaxial mounting frame 4 includes an upper plate 41, a lower plate 42, and a plurality of supporting rods 43 disposed between the upper plate 41 and the lower plate 42. A connecting bolt 45 is disposed at the center of the upper plate 41, and a mounting rod 44 is disposed at the center of the lower plate 42, so as to ensure that the connecting bolt 45 is coaxially arranged with the mounting rod 44. The lower end of the mounting rod 44 is fixed to the first forced centering plate 5, so that the coaxial mounting frame 4 is fixed to the first forced centering plate 5.

[0068] A plurality of adjustment holes are arranged in an array along the circumferential direction on the lower plate 42, and a positioning adjustment bolt 46 is threadedly connected to the inner surface of the adjustment hole. An adjustment bayonet is provided at a position corresponding to the positioning adjustment bolt 46 on the upper end surface of the first forced centering plate 5, and the lower end of the positioning adjustment bolt 46 abuts against the corresponding adjustment bayonet, so that the lower plate 42 can be adjusted to be horizontal by adjusting the positioning adjustment bolt 46.

[0069] In this embodiment, the GNSS receiver 7 is fixedly mounted on the connecting bolt 45, and a prism bracket is rotatably mounted on the mounting rod 44, and the prism is fixedly mounted on the prism bracket. In this way, the prism can rotate relatively during actual use, which can improve the practicality of the test. The GNSS receiver 7 and the first measuring instrument 8 are aligned in the up and down directions through the coaxially arranged connecting bolts 45 and the mounting rod 44, and the positioning adjustment bolts 46, ensuring that the plane coordinate values ​​of the GNSS receiver 7 and the prism are consistent. In addition, during actual monitoring, the automatic monitoring reference maintenance device can combine GNSS technology and measurement robot technology, integrate the data of the two, and use GNSS technology to determine whether the reference measured by the first measuring instrument 8 is displaced, thereby ensuring the accuracy of the data measured by the measurement robot. At the same time, the measurement data of the first measuring instrument 8 is used to optimize the GNSS data results, which is convenient for the inspection and analysis of GNSS monitoring data and measurement robot monitoring data.

[0070] like Figure 1 As shown, in this embodiment, the height of the second mounting column 3 is lower than that of the first mounting column 2, so that the GNSS receiver 7 can be prevented from being blocked and interfered, thereby improving the stability of the GNSS data. A second measuring instrument 9 is arranged on the top of the second mounting column 3, and the second measuring instrument 9 is arranged horizontally with the first measuring instrument 8 on the first mounting column 2. Specifically, in this embodiment, the second measuring instrument 9 is a total station. A second forced centering plate 6 is fixedly installed on the upper end of the second mounting column 3, and the total station is fixedly installed on the second forced centering plate 6. In this way, the first measuring instrument 8 and the second measuring instrument 9 can be used to check the data with each other, determine whether the position of the mounting base 1 has changed, and then check whether the reference point has been displaced, thereby improving the measurement accuracy.

[0071] In this embodiment, if Figure 1As shown, the monitoring reference automatic maintenance device also includes a power supply device 10 for powering. Specifically, the power supply device 10 includes a solar power supply component, and the solar power supply component includes a solar panel 101 and a battery for storing electrical energy. Of course, in other embodiments, the power supply device 10 may only include a battery, and in actual use, the power supply is continuously provided by manually replacing the battery.

[0072] A solar mounting bracket 11 is fixedly installed at the upper position of the first mounting column 2, and a solar panel 101 is fixedly installed on the solar mounting bracket 11, and the height of the solar mounting bracket 11 is higher than the height of the second mounting column 3. A battery junction box 102 is fixedly installed at the lower position of the first mounting column 2, and the battery is arranged in the battery junction box 102. The solar panel 101 is electrically connected to the battery, and the GNSS receiver 7 and the total station are electrically connected to the battery through a wire, so that the monitoring benchmark automatic maintenance device can be powered by the solar panel 101, and the power can be stored in the battery, ensuring that the monitoring benchmark automatic maintenance device can perform 24-hour uninterrupted data collection. Using solar panels to power the device can improve the practicality of the device, and the staff does not need to reach the detection point where landslide deformation may occur, thereby improving safety.

[0073] In this embodiment, if Figure 1 As shown, the solar mounting bracket 11 includes a first mounting bracket 111 and a second mounting bracket 112. The first mounting bracket 111 is arranged above the second mounting bracket 112, and the first mounting bracket 111 and the second mounting bracket 112 are disposed on both sides of the first mounting column 2. The first mounting bracket 111 is an L-shaped bracket arranged toward the second mounting column 3 and extending upward, and the two ends of the solar panel 101 are respectively fixed on the first mounting bracket 111 and the second mounting bracket 112. In this way, on the one hand, the solar mounting bracket 11 can support a larger area of ​​solar panels 101, and on the other hand, the solar panels 101 can be arranged at an angle, which is more convenient for light exposure and improves power generation efficiency.

[0074] Of course, in other embodiments, the solar mounting bracket 11 may be an integral frame structure. In other embodiments, the solar mounting bracket 11 may only include a mounting bracket disposed on one side of the first mounting column 2. In other embodiments, the first mounting bracket 111 may be a straight-line structure. In other embodiments, when actual needs are met, the heights of the first mounting bracket 111 and the second mounting bracket 112 may be the same.

[0075] In this embodiment, if Figure 1 As shown, an extension plate is provided above the second mounting frame 112, and a lightning rod 21 extending upward is fixedly mounted on the extension plate to improve the safety of field operations.

[0076] The use process of this utility model: Figure 4As shown, the first mounting column 2, the second mounting column 3 and the mounting base 1 are fixed by casting to form an integrally cast rigid building platform, the battery junction box 102, the solar panel 101, the GNSS receiver 7 and the first measuring instrument 8 are fixed on the steel pipe body of the first mounting column 2, and the second measuring instrument 9 is fixed on the second mounting column 3. The solar panel 101 generates electrical energy and stores it in the battery of the battery junction box 102, and the battery is used to power the monitoring reference automatic maintenance device.

[0077] In actual use, the first measuring instrument 8 is used to collect data from the total station at the monitored reference point, and the second measuring instrument 9 is used to collect prism data at the monitored reference point. In this way, by integrating GNSS data and the data of the first measuring instrument 8, GNSS technology can be used to determine whether the reference measured by the first measuring instrument 8 has shifted, and the measurement data of the first measuring instrument 8 can be used to optimize the GNSS data results to ensure the accuracy of the monitoring data.

[0078] The second measuring instrument 9 monitors another reference point, so that the monitoring reference automatic maintenance device can monitor two different reference points at the same time. By mutually verifying the data of the two reference points, it can be determined whether the position of the reference point has changed, thereby ensuring the monitoring accuracy.

[0079] Embodiment 3: This embodiment provides a different first measuring instrument. In this embodiment, unlike Embodiment 2, in this embodiment, the first measuring instrument is a total station. In this case, a prism is set on the opposite side, and the first measuring instrument is used to collect data of the opposite prism.

[0080] Embodiment 4: This embodiment provides a different second measuring instrument. In this embodiment, unlike Embodiment 2, in this embodiment, the second measuring instrument is a prism. In this case, a total station is set on the opposite side, and the second measuring instrument is used to collect data by the total station on the opposite side.

[0081] Embodiment 5: This embodiment provides a different first installation column. In this embodiment, unlike Embodiment 2, in this embodiment, the first installation column can also be formed by pouring concrete while meeting actual needs.

[0082] Embodiment 6: This embodiment provides a different second mounting column. In this embodiment, unlike Embodiment 2, in this embodiment, the second mounting column may also be a steel pipe structure while meeting actual needs.

[0083] Embodiment 7: This embodiment provides a different mounting base. In this embodiment, unlike Embodiment 2, in this embodiment, the mounting base can be a steel frame structure while meeting actual needs.

[0084] Embodiment 8: This embodiment provides a different mounting base. In this embodiment, unlike Embodiment 2, in this embodiment, when actual requirements are met, the height of the solar mounting bracket can be lower than the height of the second mounting column, or in other embodiments, the height of the solar mounting bracket can be equal to the height of the second mounting column.

[0085] Embodiment 9: This embodiment provides a different way to vertically align a GNSS receiver with a first measuring instrument. In this embodiment, a vertical extension rod is fixedly installed on the first forced centering plate, and two parallel horizontal rods of equal length are arranged on the vertical extension rod along vertical intervals. The GNSS receiver and the first measuring instrument are respectively fixed at the end of a horizontal rod, so that the GNSS receiver and the first measuring instrument are vertically aligned.

[0086] The above are only several embodiments of the utility model, and do not limit the utility model in any form. Although the utility model is disclosed as above in the preferred embodiments, it is not used to limit the utility model. Any technician familiar with this profession, without departing from the scope of the technical solution of the utility model, makes slight changes or modifications using the technical contents disclosed above, which are equivalent to equivalent implementation cases and fall within the scope of the technical solution.

Claims

1. A device for monitoring reference points, characterized in that: It includes a first mounting column, a GNSS receiver and a first measuring instrument; The first mounting column is arranged at a monitoring reference point; The GNSS receiver and the first measuring instrument are vertically coaxially arranged on the first mounting column; The GNSS receiver is located above the first measuring instrument; Also included is a second mounting post and a second gauge; The second mounting column is arranged on the monitoring reference point and is horizontally spaced apart from the first mounting column; The second measuring instrument is arranged on the top end of the second mounting column.

2. The monitoring reference point device according to claim 1, characterized in that: Also included is a coaxial mount; The coaxial mounting bracket is arranged at the top end of the first mounting column; The GNSS receiver and the first measuring instrument are arranged on the coaxial mounting frame.

3. The monitoring reference point device according to claim 2, characterized in that: The coaxial mounting frame specifically comprises an upper plate and a lower plate arranged in parallel; A plurality of support rods are arranged between the upper plate and the lower plate, and a receiving space is formed between the upper plate and the lower plate; The GNSS receiver is arranged at the center of the upper surface of the upper plate; The first measuring instrument is arranged at the center of the upper surface of the lower plate and is located in the accommodating space.

4. The monitoring reference point device according to claim 3, characterized in that: The coaxial mounting frame also includes a mounting rod; The mounting rod is arranged at the center of the upper surface of the lower plate; The first measuring instrument is rotatably arranged on the mounting rod.

5. The monitoring reference point device according to claim 1, characterized in that: The first measuring instrument is a total station or a prism; The second measuring instrument is a total station or a prism.

6. The monitoring reference point device according to claim 1, characterized in that: The first mounting column and the second mounting column are arranged on the same mounting base.

7. The monitoring reference point device according to claim 1, characterized in that: The installation height of the second surveying instrument is smaller than the installation height of the GNSS receiver.

8. The monitoring reference point device according to claim 2, characterized in that: The monitoring reference point device also includes a first forced centering disk; The first forced centering disk is disposed between the coaxial mounting bracket and the first mounting post.

9. The monitoring reference point device according to claim 1, characterized in that: The monitoring reference point device also includes a power supply device; The power supply device is arranged on the first mounting column; The power supply device is connected to the GNSS receiver.

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