A method and system for automatically monitoring horizontal displacement of a reference line by continuous tracking

Abstract

The application relates to a method and system for automatically monitoring horizontal displacement of a continuous tracking reference line method, which comprises the following steps: setting A point and B point as working base points, determining a reference line, setting n points as monitoring points, acquiring initial horizontal and vertical distances D of the monitoring points to the reference line through a total station, dividing the monitoring points into N groups, setting a laser emitter and a laser displacement sensor for each group of adjacent monitoring points, acquiring the abscissa of each monitoring point through the laser displacement sensor, calculating the horizontal displacement of each monitoring point according to the abscissa of each monitoring point this time and last time, and sending the horizontal displacement to a relevant monitoring data management platform. i The application has the beneficial effects that the horizontal displacement of a building foundation pit can be automatically monitored in real time, the workload of a measurer is reduced, and the real-time performance, reliability and accuracy of foundation pit monitoring are improved.

Description

Technical Field

[0001] This invention relates to the field of engineering measurement technology, and in particular to a method and system for automatic monitoring of horizontal displacement using a continuous tracking baseline method. Background Technology

[0002] With the development of economic construction, a large number of infrastructure projects have been put into construction. Engineering surveying is an important means to ensure the quality and safety of engineering construction, and the measurement of horizontal displacement at monitoring points is an essential part of monitoring work. Among the existing methods for measuring horizontal displacement, the baseline method, such as the small angle method and laser collimation, requires surveying technicians to operate instruments on-site, which cannot achieve automated monitoring. When measuring horizontal displacement using the polar coordinate method, it is possible to achieve automated monitoring with surveying robots, but the investment is large and the requirements for the installation conditions of on-site equipment and devices are stringent, which is not conducive to large-scale promotion and use.

[0003] The digital transformation of various industries also involves related professions in the construction field. The construction of smart construction sites has also placed higher demands on the safety monitoring of construction sites, requiring monitoring methods to transition from traditional manual monitoring to automated and intelligent monitoring. Currently, from a technical and economic perspective, there is a need for a measurement system that can monitor the horizontal displacement of engineering projects in real time over a long period of time, in order to reduce manual measurement and improve the reliability of measurement data. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a method and system for automatic monitoring of horizontal displacement using a continuous tracking baseline method that is capable of continuous automatic tracking and monitoring, has high accuracy, and is economical.

[0005] The objective of this invention is achieved through the following technical solution: One aspect of this invention: A method for automatic monitoring of horizontal displacement using a continuous tracking baseline method, comprising: setting points A and B as working base points, determining a baseline, wherein the straight line between points A and B is determined as the baseline; setting n points as monitoring points, and obtaining the initial horizontal and vertical distance Di between the monitoring points and the baseline using a total station; dividing the monitoring points into N groups, and setting laser displacement sensors for adjacent monitoring points in each group; obtaining the abscissa of each monitoring point using the laser displacement sensors; calculating the horizontal and vertical displacement changes of each group of monitoring points based on the abscissas obtained by the laser displacement sensors; calculating the horizontal displacement of each monitoring point based on the horizontal displacement changes and transmitting the data to a measurement terminal.

[0006] Preferably, the step of setting points A and B as working base points and determining the baseline includes determining the straight line between points A and B as the baseline, which includes:

[0007] Select the object whose horizontal displacement needs to be measured and set working base points A and B for it. The line connecting working base points A and B is determined as the baseline.

[0008] Preferably, n points are designated as monitoring points, and the initial horizontal and vertical distances D between the monitoring points and the baseline are obtained using a total station. i ,include:

[0009] Set n monitoring points, with an interval of less than 20 meters between adjacent monitoring points; select working base point A as the measuring station, install a total station at working base point A, and obtain the distance M from point A to the first monitoring point and the angle between the line connecting point A to the first monitoring point and the baseline through the total station;

[0010] Based on the distance M from point A to the first monitoring point obtained by the total station and the angle between the line connecting point A to the first monitoring point and the baseline, calculate the initial horizontal and vertical distance D1 between the first monitoring point and the baseline.

[0011] Preferably, the initial horizontal and vertical distance D of the n monitoring points is determined by the method described in claim 3 above. i .

[0012] Preferably, the monitoring points are divided into N groups, and laser displacement sensors are installed between adjacent monitoring points in each group; the abscissa of each group of monitoring points is obtained through the laser displacement sensors, including:

[0013] Divide the n monitoring points into N groups, and set up laser displacement sensors at adjacent monitoring points in each group;

[0014] The laser displacement sensor includes a laser transmitter and a laser receiver. The laser transmitter is located at the adjacent previous monitoring point. The laser receiver is located at the monitoring point to receive the laser emitted by the laser transmitter at the adjacent previous monitoring point. The monitoring point also has a laser transmitter at the adjacent next monitoring point.

[0015] Preferably, the distance between the laser displacement sensor and each set of monitoring points is less than 50cm, so that the spatial change of the laser displacement sensor is consistent with the spatial change of adjacent monitoring points. Only a laser emitter is installed at working base point A, only a laser receiver is installed at working base point B, and a laser receiver is installed at monitoring point n. The horizontal coordinate x of the monitoring point can be obtained through the laser receiver. i .

[0016] Preferably, the horizontal displacement change of each group of monitoring points is calculated based on the abscissa of each monitoring point obtained by the laser displacement sensor; including:

[0017] The horizontal coordinate of the center of the laser spot is obtained from the laser displacement sensor and uploaded to the cloud management platform;

[0018] Obtain the x-coordinate of each monitoring point from the previous monitoring and record it as x. i '; Obtain the x-coordinate of each monitoring point and record it as x'. i "; where the x-coordinate of each monitoring point in the previous measurement is the x-coordinate of each monitoring point in the previous measurement of the distance to be calculated this time;

[0019] The x-coordinate of each monitoring point in this study is used as a basis. i "and the x-coordinate of each monitoring point in the previous monitoring period" i The difference between the two points is used to calculate the change in horizontal displacement Δ between adjacent monitoring points. i ;

[0020] Based on the adjacent horizontal displacement change Δ at this monitoring point i Calculate the total horizontal displacement change ∑Δ at this monitoring point. i .

[0021] Preferably, based on the initial horizontal and vertical distance D of the previous monitoring point i The sum of the horizontal displacement changes ∑Δ i Calculate the actual horizontal and vertical distance D i '; where, through the initial horizontal and vertical distance D i The sum of the horizontal displacement changes ∑Δ i Add them together to get the actual horizontal and vertical distance D i '.

[0022] In another aspect of the present invention, a system for automatic monitoring of horizontal displacement using a continuous tracking baseline method is provided, comprising:

[0023] A total station is used to obtain the initial horizontal and vertical distance D between the monitoring point and the baseline. i This includes obtaining the distance M from point A to the first monitoring point and the angle between the line connecting point A to the first monitoring point and the baseline; calculating the initial horizontal and vertical distance D1 between the first monitoring point and the baseline; and obtaining the horizontal distance D using the steps described above. i .

[0024] A laser displacement sensor, comprising a laser emitter and a laser receiver, wherein the laser emitter emits laser light and the laser receiver receives the laser light emitted by the laser emitter and acquires the coordinates of the laser light on the laser receiver.

[0025] The coordinate analysis module is used to extract the laser coordinate information received by the laser receiving device, generate position data, and upload it to the data processing module.

[0026] The data processing module is used to calculate the data measured by the laser displacement sensor and send the calculation results to the measurement terminal;

[0027] A measurement terminal is used to receive and display measurement results.

[0028] The present invention has the following advantages:

[0029] Based on the above technical solution, a baseline is determined by setting points A and B as working base points, with the straight line between points A and B serving as the baseline. n points are designated as monitoring points, and the initial horizontal and vertical distances Di between the monitoring points and the baseline are obtained using a total station. The monitoring points are divided into N groups, with laser displacement sensors installed between adjacent monitoring points in each group. The abscissas of each group of monitoring points are obtained using the laser displacement sensors. Based on the abscissas of each group of monitoring points, the change in horizontal displacement of each group of monitoring points is calculated. The horizontal displacement of each group of monitoring points is then calculated based on the change in horizontal displacement and transmitted to the measurement terminal. This method enables automatic monitoring of horizontal displacement in building construction projects; it allows for long-term monitoring of horizontal displacement changes in large-scale building projects, reducing the workload of surveyors and improving the reliability and accuracy of long-term monitoring. Attached Figure Description

[0030] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the method steps of the present invention;

[0032] Figure 2 This is a schematic diagram of the system structure of the present invention. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0034] See Figure 1 and Figure 2 As shown: A method for automatic monitoring of horizontal displacement using a continuous tracking baseline method, comprising:

[0035] S101: Set points A and B as working base points and determine the baseline, wherein the straight line between points A and B is determined as the baseline;

[0036] Specifically, select the object whose horizontal displacement needs to be measured and set working base points A and B for it. The line connecting working base points A and B is determined as the baseline. The selection of working base points should be such that the object being measured is between working base points A and B. The connecting line between working base points A and B is set as the baseline. The baseline is used as a reference for the monitored object to determine whether the object has undergone displacement.

[0037] S102: Set n points as monitoring points, and use total station 21 to obtain the initial horizontal and vertical distance Di between the monitoring points and the baseline;

[0038] Specifically, n points are set as monitoring points, and the initial horizontal and vertical distances Di between the monitoring points and the baseline are obtained using a total station 21, including:

[0039] Set up n monitoring points, with the distance between adjacent monitoring points being less than 20 meters; select the working base point A as the measuring station, install a total station 21 at the measuring station location, and obtain the distance M from point A to the first monitoring point and the angle between the line connecting point A to the first monitoring point and the baseline through the total station 21;

[0040] Based on the distance M from point A to the first monitoring point and the angle between the line connecting point A and the first monitoring point and the baseline obtained from total station 21, the initial horizontal and vertical distance D1 between the first monitoring point and the baseline is calculated using the formula.

[0041]

[0042] Where D is the initial horizontal and vertical distance from the monitoring point to the baseline; M is the straight-line distance from the working base point A to the monitoring point; α is the angle between the straight line from the working base point A to the monitoring point and the baseline, in seconds; and ρ is a measurement constant with a value of 206265. The initial horizontal and vertical distances D of n monitoring points are measured using the above method. i .

[0043] S103: Divide the monitoring points into N groups, and set up laser displacement sensors 23 for adjacent monitoring points in each group; obtain the abscissa of each group of monitoring points through laser displacement sensors 23.

[0044] Specifically, n monitoring points are divided into N groups, and laser displacement sensors 23 are set between adjacent monitoring points in each group;

[0045] The laser displacement sensor 23 includes a laser emitter 24 and a laser receiver 25. The laser emitter 24 is located at the adjacent preceding monitoring point. The laser receiver 25 at this monitoring point receives the laser emitted by the laser emitter 24 at the adjacent preceding monitoring point. Simultaneously, a laser emitter 24 is also located at the adjacent next monitoring point. The distance between the laser displacement sensor 23 and each set of monitoring points is 50cm. Only the laser emitter 24 is located at the working base point A, and only the laser receiver 25 is located at monitoring point n. The horizontal coordinate (x) of the monitoring point can be obtained through the laser receiver 25. i .

[0046] S104: Obtain the abscissa of each group of monitoring points based on the laser displacement sensor 23, and calculate the change in adjacent horizontal displacement of each group of monitoring points.

[0047] Specifically, obtain the x-coordinate of each monitoring point from the previous monitoring and record it as x. i '; Obtain the x-coordinate of each monitoring point and record it as x'. i "; through formula

[0048] Δ i =x i "-x i '

[0049] Calculate Δ i Among them, the x-coordinate of each monitoring point in the previous monitoring period is... i 'That is, the x-coordinates of each monitoring point measured in the previous measurement for the distance obtained this time;

[0050] Based on the x-coordinate of each monitoring point... i "and the x-coordinate of each monitoring point in the previous monitoring period" i 'Calculate the change in horizontal displacement Δ between adjacent monitoring points. i .

[0051] Similarly, the change in horizontal displacement between adjacent working base point B is:

[0052] Δ B =x B "-x B '

[0053] The total amount is calculated based on all the displacements in this case:

[0054] ∑Δi=Δ b +Δ1+Δ2+....+Δn+Δ B

[0055] Theoretically, Δ = 0. If Δ is less than the allowable error range, the observation data is acceptable and can be used.

[0056] S105: Based on the adjacent horizontal displacement change Δ at each monitoring point i The horizontal displacement Di of each monitoring point is calculated and sent to the measurement terminal 22. Specifically, based on the initial horizontal and vertical distance D of the previous monitoring point... i and the adjacent horizontal displacement change Δ i Calculate the actual horizontal and vertical distance D i '; where, through the initial horizontal and vertical distance D i and the adjacent horizontal displacement change Δ i Add them together to get the actual horizontal and vertical distance D i '. Through the formula:

[0057] D1'=D1+Δ1

[0058] D2'=D2+Δ1+Δ2

[0059] D3'=D3+Δ1+Δ2+Δ3 ........

[0061] D n '=D i +Δ1+Δ2+....+Δn

[0062] Calculate the actual horizontal and vertical distance D i '。 Among them, D1, D2, D3...D iLet D1', D2', D3', ..., Dn' be the initial horizontal and vertical distances, and D1', D2', D3', ..., Dn' be the actual horizontal and vertical distances of each monitoring point. Since each monitoring point is equipped with a laser displacement sensor 23, when the horizontal displacement of this monitoring point changes, the laser received by the laser displacement sensor 23 at the next monitoring point originates from the laser emitter 24 at this monitoring point. Therefore, the laser position received by the laser receiving device 25 at the next monitoring point includes the change in horizontal displacement of this monitoring point. Thus, when calculating the horizontal displacement of the next monitoring point, the change in horizontal displacement of this monitoring point needs to be added. After the horizontal displacement of each monitoring point is calculated, it is sent to the measurement terminal 22. The testing personnel can then directly obtain the measurement results at the measurement terminal 22.

[0063] Based on the same inventive concept, embodiments of the present invention also provide an automatic horizontal displacement measurement system using a continuous tracking baseline method, comprising:

[0064] Total station 21, used to obtain the initial horizontal and vertical distance D between the monitoring point and the baseline. i This includes obtaining the distance M from point A to the first monitoring point and the angle between the line connecting point A to the first monitoring point and the baseline; calculating the initial horizontal and vertical distance D1 between the first monitoring point and the baseline; and obtaining the horizontal distance D using the steps described above. i .

[0065] The laser displacement sensor 23 includes a laser emitter 24 and a laser receiver 25. The laser emitter 24 is used to emit laser light, and the laser receiver 25 is used to receive the laser light emitted by the laser emitter 24 and obtain the coordinates of the laser light on the laser receiver 25.

[0066] The coordinate analysis module 26 is used to extract the laser coordinate information received by the laser receiving device 25, generate position data, and upload it to the data processing module 27.

[0067] Data processing module 27 is used to calculate the data measured by laser displacement sensor 23 and send the calculation results to measurement terminal 22;

[0068] Measurement terminal 22 is used to receive and display measurement results.

[0069] Based on the above technical solution, points A and B are set as working base points, and a baseline is determined, wherein the straight line between points A and B is defined as the baseline; n points are set as monitoring points, and the initial horizontal and vertical distances D between the monitoring points and the baseline are obtained using a total station 21. iThe monitoring points are divided into N groups, and laser displacement sensors 23 are installed between adjacent monitoring points in each group. The abscissa of each group of monitoring points is obtained through the laser displacement sensors 23. Based on the abscissa of each group of monitoring points obtained by the laser displacement sensors 23, the change in horizontal displacement between adjacent monitoring points in each group is calculated. Based on the change in horizontal displacement between adjacent monitoring points, the horizontal displacement of each monitoring point is calculated and sent to the measurement terminal 22. This method enables automatic monitoring of horizontal displacement in building engineering projects; it allows for long-term monitoring of horizontal displacement changes in large-scale building engineering projects, reducing the workload of surveyors and improving the reliability and accuracy of long-term monitoring.

[0070] Other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the following claims.

[0071] The above embodiments only illustrate preferred implementation methods, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this invention, and these all fall within the protection scope of this invention.

Claims

1. A method for automatic monitoring of horizontal displacement using a continuous tracking baseline method, characterized in that: include: Set points A and B as working base points and determine the baseline, wherein the straight line between points A and B is determined as the baseline; Set n points as monitoring points, and use a total station to obtain the initial horizontal and vertical distance Di between the monitoring points and the baseline; The monitoring points are divided into N groups, and laser displacement sensors are installed between adjacent monitoring points in each group; the horizontal coordinates of each monitoring point are obtained through the laser displacement sensors. The abscissa of each group of monitoring points is obtained based on the laser displacement sensor, and the change in adjacent horizontal displacement of each group of monitoring points is calculated. Based on the changes in adjacent horizontal displacements, the horizontal displacement of each monitoring point is calculated and sent to the measurement terminal; The process of setting n points as monitoring points and obtaining the initial horizontal and vertical distances Di between the monitoring points and the baseline using a total station includes: Set n monitoring points, with an interval of less than 20 meters between adjacent monitoring points; select working base point A as the measuring station, install a total station at working base point A, and obtain the distance M from point A to the first monitoring point and the angle between the line connecting point A to the first monitoring point and the baseline through the total station; Based on the distance M from point A to the first monitoring point and the angle between the line connecting point A to the first monitoring point and the baseline obtained by the total station, calculate the initial horizontal and vertical distance D1 between the first monitoring point and the baseline. Specifically through the formula Where D: is the initial horizontal and vertical distance from the monitoring point to the baseline; M: is the straight-line distance from the working base point A to the monitoring point; : The angle between the straight line from the working base point A to the monitoring point and the baseline, expressed in seconds. : is a measurement constant, The value is 206265; The step of setting points A and B as working base points and determining the baseline includes defining the straight line between points A and B as the baseline. Select the object whose horizontal displacement needs to be measured and set working base points A and B for it. The line connecting working base points A and B is determined as the baseline. The monitoring points are divided into N groups, and laser displacement sensors are installed between adjacent monitoring points in each group; the abscissas of the monitoring points in each group are obtained through the laser displacement sensors, including: Divide the n monitoring points into N groups, and set up laser displacement sensors at adjacent monitoring points in each group; The laser displacement sensor includes a laser transmitter and a laser receiver. The laser transmitter is located at the adjacent previous monitoring point. The laser receiver is located at the monitoring point to receive the laser emitted by the laser transmitter at the adjacent previous monitoring point. The monitoring point also has a laser transmitter at the adjacent next monitoring point.

2. The method for automatic monitoring of horizontal displacement using a continuous tracking baseline method according to claim 1, characterized in that, The distance between the laser displacement sensor and each monitoring point is less than 50cm, ensuring that the spatial change of the laser displacement sensor is consistent with the spatial change of adjacent monitoring points. Only a laser emitter is installed at working base point A, only a laser receiver is installed at working base point B, and a laser receiver is installed at monitoring point n. The horizontal coordinate (x) of each monitoring point can be obtained through the laser receiver. i .

3. The method for automatic monitoring of horizontal displacement using a continuous tracking baseline method according to claim 1, characterized in that, Based on the abscissa of each monitoring point obtained by the laser displacement sensor, the change in horizontal displacement between adjacent monitoring points in each group is calculated, including: The horizontal coordinate of the center of the laser spot is obtained from the laser displacement sensor and uploaded to the cloud management platform; Obtain the x-coordinate of each monitoring point from the previous monitoring and record it as x. i '; Obtain the x-coordinate of each monitoring point and record it as x'. i ''; where the x-coordinate of each monitoring point in the previous measurement is the x-coordinate of each monitoring point measured in the previous measurement for the distance to be calculated this time; The x-coordinate of each monitoring point in this study is used as a basis. i '' and the x-coordinate of each monitoring point in the previous monitoring. i The difference between the two points is used to calculate the change in horizontal displacement Δ between adjacent monitoring points. i .

4. The method for automatic monitoring of horizontal displacement using a continuous tracking baseline method according to claim 3, characterized in that, Based on the initial horizontal and vertical distance D of the previous monitoring point i The sum of the horizontal displacement changes ∑Δ i Calculate the actual horizontal and vertical distance D i '; where, through the initial horizontal and vertical distance D i The sum of the horizontal displacement changes ∑Δ i Add them together to get the actual horizontal and vertical distance D i '.

5. A system for automatic horizontal displacement monitoring using a continuous tracking baseline method, used to execute the method for automatic horizontal displacement monitoring using a continuous tracking baseline method as described in any one of claims 1 to 4, characterized in that, include: A total station is used to obtain the initial horizontal and vertical distance D between the monitoring point and the baseline. i This includes obtaining the distance M from point A to the first monitoring point and the angle between the line connecting point A to the first monitoring point and the baseline; calculating the initial horizontal and vertical distance D1 between the first monitoring point and the baseline; and obtaining the horizontal distance D using the steps described above. i ; A laser displacement sensor, comprising a laser emitter and a laser receiver, wherein the laser emitter emits laser light and the laser receiver receives the laser light emitted by the laser emitter and acquires the coordinates of the laser light on the laser receiver. The coordinate analysis module is used to extract the laser coordinate information received by the laser receiving device, generate position data, and upload it to the data processing module. The data processing module is used to calculate the data measured by the laser displacement sensor and send the calculation results to the measurement terminal; A measurement terminal is used to receive and display measurement results.

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