Device for rapidly measuring tunnel ovality and outputting result in real time

Abstract

The utility model discloses a device for rapidly measuring tunnel ovality and outputting results in real time. The device comprises an ovality measuring module, a data transmission module, a mobile terminal data processing module and a data output module, the ellipticity measuring module is connected with the data transmission module, the data transmission module sends a signal to the mobile terminal data processing module, the signal is output through the data output module, the ellipticity measuring module comprises a sliding table module (5), a height adjusting structure is arranged below the sliding table module (5), and the sliding table module (5) is connected with the data transmission module. And a tubular level bubble (6) for detecting whether the long axis of the sliding table module (5) is horizontal or not is arranged above the sliding table module (5). The labor cost and the equipment cost are low; efficient measurement and real-time result output can be realized; and the device can adapt to complex working conditions.

Description

Technical Field

[0001] The utility model relates to the field of engineering measurement, in particular to a device for quickly measuring the ovality of a tunnel and outputting the results in real time. Background Art

[0002] In recent years, my country's subway construction has flourished, and many cities have successively carried out subway construction. At present, the main construction methods of subway projects include open-cut method, shallow buried dark excavation method, shield method, etc. The shield method has been widely used in subway construction due to its wide applicability, fast excavation speed, small disturbance to the stratum, and high safety. Most shield tunnels use circular segments as support structures. During the construction stage, the segments serve as support structures for tunnel construction, which can protect the excavation surface to prevent soil deformation, collapse and mud and water infiltration, and withstand the jack force and other construction loads during shield advancement; after the completion of the tunnel, it serves as a permanent support structure to prevent mud and water infiltration, and at the same time support the water and soil pressure around the lining. Therefore, the health monitoring of tunnel segments is particularly important.

[0003] Ovality, also known as out-of-roundness, can measure the assembly quality of shield tunnel segments, quantitatively analyze the overall deformation of shield tunnel segments, and quantify the out-of-roundness of shield tunnel segments. The design, acceptance and protection specifications for subway tunnel shield construction all stipulate and require the ovality tolerance of segments.

[0004] At present, the main methods for measuring ellipticity include manual plumb bob combined with steel ruler measurement, total station measurement, three-dimensional laser scanning, etc. During the assembly stage of shield tunnel segments, due to the large number of shield machine equipment and the small space at the tail of the shield, it is not suitable to set up total stations, scanners and other instruments and equipment. The on-site ellipticity measurement is generally carried out by manual plumb bob combined with steel ruler measurement. This method is cumbersome, time-consuming and labor-intensive, and the steel ruler measurement itself has a large error problem, resulting in inaccurate ellipticity. After the tunnel is formed, total stations, scanners and other instruments and equipment have operating space, but there are problems such as complex on-site operation, high labor costs, difficulty in data processing, and inability to output ellipticity in real time.

[0005] At present, the main methods for measuring ellipticity include manual plumb bob with steel ruler measurement, total station measurement, and three-dimensional laser scanning. In the manual plumb bob with steel ruler measurement method, workers hang a steel ruler along the edge of the segment, and then use a steel tape measure to measure the length of the vertical line to fit the major and minor axes of the segment. This method is cumbersome, time-consuming and labor-intensive, and the steel tape measure itself has a large error problem, resulting in inaccurate ellipticity. The total station measurement method uses the total station without prism method to collect point coordinates along the segment. The operation space requirement is large and it is not suitable for ellipticity measurement in the tunnel segment assembly stage. The operation is complicated, the labor and equipment costs are high, and the ellipticity results cannot be directly output on site, requiring post-processing. The three-dimensional laser scanning method uses a scanner to scan the tunnel, obtain the tunnel point cloud data, and then output the ellipticity through software processing. This method requires a large operation space and is not suitable for ellipticity measurement in the tunnel segment assembly stage. The on-site operation is complicated, the labor and equipment costs are high, and the large amount of data requires professional software to process. The ellipticity results cannot be output in real time on site. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide a device for quickly measuring the ovality of a tunnel and outputting the results in real time. The device can be used to measure the ovality of a tunnel in the tunnel segment assembly stage, and can solve the pain points of low precision, cumbersome operation, and time-consuming and labor-intensive measurement methods such as manual plumb bob and steel ruler measurement, and can guide the segment assembly process in real time to improve the assembly quality of the tunnel segments. In the tunnel forming stage, the utility model can solve the pain points of complex operation, high cost of manual equipment, time-consuming data processing, and inability to output the results in real time in measuring the ovality using the total station measurement method and the three-dimensional laser scanning method, and improve the efficiency of ovality measurement.

[0007] The utility model is a device for quickly measuring the ovality of a tunnel and outputting the results in real time, which is realized by the following technical scheme: comprising an ovality measurement module, a data transmission module, a mobile terminal data processing module and a data output module;

[0008] The ellipticity measurement module is connected to the data transmission module, and the data transmission module sends a signal to the mobile terminal data processing module and outputs it through the data output module.

[0009] As a preferred technical solution, the ellipticity measurement module includes:

[0010] A slide module, wherein a height adjustment structure is provided below the slide module, and a tube level bubble is provided above the slide module for detecting whether the long axis of the slide module is horizontal;

[0011] The base provides an installation platform for the rotary laser ranging module and the horizontal ranging laser module, and a servo motor is installed on the base; the base is connected to the slide module through a screw rod; the screw rod is driven by the servo motor, thereby driving the base to perform linear motion along the slide module.

[0012] As a preferred technical solution, the rotating laser ranging module is connected to the base via a rotating shaft, and a servo motor is installed on the rotating shaft, and the servo motor drives the rotating laser ranging module to perform circular motion.

[0013] As a preferred technical solution, a reflective sheet is installed at one end of the slide module, and the horizontal ranging laser module on the base corresponds to the position of the reflective sheet.

[0014] As a preferred technical solution, an integrated data transmission module is provided in the base, and the integrated data transmission module receives and transmits signals via Bluetooth.

[0015] As a preferred technical solution, the height adjustment structure is an adjustable height bolt symmetrically arranged below the slide module, and the slide module is placed in a horizontal state by adjusting the adjustable height bolt.

[0016] As a preferred technical solution, a foot support is installed below the adjustable height bolt, and the rear edges of the left and right foot supports are aligned with the annular gap, which can ensure that the measured points are located at the same mileage.

[0017] The beneficial effects of the utility model are:

[0018] 1. The labor and equipment costs of the utility model are low; the slide module, laser distance sensor, and rotation angle sensor used are cheap and easy to obtain, which greatly reduces the equipment cost compared to total stations, three-dimensional laser scanners and other instruments that cost hundreds of thousands of yuan; at the same time, it is simple and light, easy to carry, and simple to operate, and can be operated by one person, which greatly reduces labor costs.

[0019] 2. The utility model can measure efficiently and output the results in real time. It is simple to operate and has a fast measuring speed. It can measure the ovality of the pipe segment efficiently and accurately. It can also calculate and output the results of the ovality of the pipe segment in real time through the mobile data processing module and the data output module, so that data processing can be completed without leaving the tunnel, which greatly improves work efficiency.

[0020] 3. The utility model can adapt to complex working conditions; it is simple and light, easy to carry, and suitable for use under various working conditions. In addition to measuring ovality in the tunnel forming stage, it can also be used in the tunnel segment assembly stage, and has a wide range of applications; in the tunnel assembly stage, there are many shield tail devices, the space is extremely narrow, and the environment is harsh and complex. Conventional measuring equipment such as total stations and three-dimensional laser scanners are basically unable to measure at the shield tail station. The present invention uses a slide module and a rotating laser ranging module to overcome the influence of the narrow space, realize data collection under complex working conditions, and through the function of real-time output of the segment ovality results, guide the shield tail segment assembly work in real time, and improve the segment assembly quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a flow chart of the utility model;

[0023] Figure 2 This is a schematic diagram of the structure of the utility model

[0024] Figure 3 This is a flow chart of the mobile terminal data processing module of the utility model;

[0025] Figure 4 It is a measurement schematic diagram of the utility model.

[0026] Description of reference numerals:

[0027] 1. Rotating laser distance measurement module; 2. Horizontal distance measurement laser module; 3. Base; 4. Reflector; 5. Slide module; 6. Tube level bubble; 7. Adjustable height bolt; 8. Foot support. DETAILED DESCRIPTION

[0028] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.

[0029] like Figure 1 As shown, the utility model is a device for quickly measuring the ovality of a tunnel and outputting the results in real time, comprising an ovality measurement module, a data transmission module, a mobile terminal data processing module and a data output module;

[0030] The ellipticity measurement module is connected to the data transmission module, and the data transmission module sends a signal to the mobile terminal data processing module and outputs it through the data output module.

[0031] like Figure 2 As shown, the ellipticity measurement module includes: a rotating laser distance measurement module 1, a horizontal distance measurement laser module 2, a base 3, a reflector 4, a slide module 5, a tube level bubble 6, an adjustable height bolt 7 and a foot support 8;

[0032] First, set up the ovality measuring device on the inner wall of the segment, align the rear edges of the left and right foot supports 8 with the annular seam between the segments to ensure that the measured points are at the same mileage, then adjust the adjustable height bolt 7, observe the level bubble 6, and level the slide module 5 so that its long axis is in a horizontal position.

[0033] The base 3 and the reflector 4 are installed on the slide module 5; the base 3 and the slide module 5 are connected by a screw rod and can move linearly along the screw rod. The slide has a drive motor that can drive the base 3 to slide along the screw rod. The main purpose is to avoid objects that block the laser by moving the base 3 under complex working conditions, especially when there are many devices at the tail of the shield, and measure more positions on the inner wall of the tunnel. The reflector 4 is fixed on the slide module 5, and the surface of the reflector 4 is perpendicular to the laser emitted by the horizontal ranging laser module 2, and the center of the reflector 4 coincides with the laser.

[0034] The rotating laser ranging module 1 and the horizontal ranging laser module 2 are installed on the base 3. The rotating laser ranging module 1 is installed on a rotating shaft of the base 3. The other end of the rotating shaft is connected to a driving motor, which can drive the rotating laser ranging module 1 to make circular motion around the rotating shaft. The rotating laser ranging module 1 has a laser ranging sensor and a rotation angle sensor. At a certain moment when the rotating laser ranging module 1 rotates around the rotating shaft, the laser ranging sensor can measure the distance to the inner wall of the tunnel at this time, and the rotation angle sensor can measure the zenith angle of the laser at this time. The horizontal ranging laser module 2 is installed on the side of the base 3 and faces the reflector 4. The horizontal ranging laser module 2 has a laser ranging sensor, which can measure the distance to the reflector 4. Its main function is to measure the position of the base 3 on the slide.

[0035] A custom coordinate system is established with the center of the reflector 4 as the origin, the line connecting the center of the reflector 4 and the center of the laser of the horizontal ranging laser module 2 as the X-axis, and the vertical direction as the Y-axis. The coordinates of the inner wall of the tunnel in the custom coordinate system are calculated by measuring the distance and angle obtained by rotating the laser ranging module 1. The coordinate data is then transmitted to the mobile terminal data processing module through the data transmission module for processing. After the ellipticity result is calculated, the result is output through the data output module.

[0036] Among them, the rotating laser ranging module is composed of a laser ranging sensor and a rotation angle sensor. Under the combined action of the laser ranging sensor and the rotation angle sensor, the distance to the inner wall of the tunnel and the zenith angle of the laser are measured.

[0037] Among them, the horizontal ranging laser module is composed of a laser ranging sensor, which is used to measure the distance to the reflector.

[0038] The main function of the data transmission module is to transmit the original measurement data such as the distance and angle data measured by the rotating laser ranging module 1 and the horizontal ranging laser module 2 to the mobile terminal data processing module via Bluetooth.

[0039] like Figure 3 As shown, the main function of the mobile terminal data processing module is to process the raw measurement data and calculate the ellipticity data; first, the module receives the raw measurement data such as distance and angle, and converts the raw data such as side length and angle into the coordinates of the measurement point by calling the coordinate calculation program, and then eliminates the flying point data by the noise elimination program. After the noise elimination is completed, the ellipse fitting program is called to fit the measurement coordinates using the least squares method, and finally the ellipticity calculation module is called to calculate the major axis, minor axis, ellipticity and deflection angle of the segment; the mobile terminal data processing module and the data output module can be packaged into an application and installed on mobile terminals such as mobile phones and tablets.

[0040] Among them, the main function of the data output module is to output the results such as the major axis, minor axis, ellipticity, deflection angle and the distribution map of the measurement points of the pipe segment, and display them on the mobile phone or tablet computer display.

[0041] like Figure 4 As shown, the ellipticity measuring device is set up on the inner wall of the tunnel segment in the above manner, with the center of the reflector as the origin O, and a custom coordinate system is established as shown in the figure. At a certain instant T1, the rotating laser ranging module measures the distance to the inner wall of the tunnel as D, and the angle is α (α is the angle between the laser of the rotating laser ranging module and the positive direction of the Y axis). The distance from the emission center of the laser ranging sensor in the rotating laser ranging module to the center of the rotating shaft is d, and the vertical distance from the center of the rotating shaft to the X axis is h. The horizontal ranging laser module measures the distance to the center of the reflector as L, and the distance from the emission center of the laser ranging sensor of the horizontal ranging laser module to the center line of the vertical axis of the base is l. Then the coordinates of the inner wall of the tunnel measured at time T1 (X1, Y1) can be calculated by the following formula:

[0042] X1=L+1;

[0043] Y1=(D+d)*cosα+h;

[0044] By setting the sampling interval of the device, the inner wall coordinates of the pipe segments at different positions and with uniform distribution can be obtained. The obtained inner wall coordinates of the pipe segments are transmitted to the mobile data processing module through the data transmission module for processing, and the ovality results of the pipe segments can be obtained in real time.

[0045] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that are not conceived through creative work should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope defined in the claims.

Claims

1. A device for rapidly measuring tunnel ellipticity and outputting results in real time, characterized in that: include: Ellipticity measurement module, data transmission module, mobile terminal data processing module and data output module; The ellipticity measurement module is connected to the data transmission module, and the data transmission module sends a signal to the mobile terminal data processing module and outputs it through the data output module.

2. The device for rapidly measuring tunnel ellipticity and outputting results in real time according to claim 1 is characterized in that: The ellipticity measurement module comprises: A slide module (5), wherein a height adjustment structure is arranged below the slide module (5), and a tube level bubble (6) is arranged above the slide module (5) for detecting whether the long axis of the slide module (5) is horizontal; A base (3) is provided, wherein the base (3) provides a mounting platform for a rotary laser distance measurement module (1) and a horizontal distance measurement laser module (2), and a servo motor is mounted on the base (3); the base (3) is connected to a slide module (5) via a screw rod; the screw rod is driven by the servo motor, thereby driving the base (3) to perform linear motion along the slide module (5).

3. The device for rapidly measuring tunnel ellipticity and outputting results in real time according to claim 1 is characterized in that: The rotating laser distance measuring module (1) and the base (3) are connected via a rotating shaft, and a servo motor is installed on the rotating shaft. The servo motor drives the rotating laser distance measuring module (1) to perform circular motion.

4. The device for rapidly measuring tunnel ellipticity and outputting results in real time according to claim 2 is characterized in that: A reflective sheet (4) is installed at one end of the slide module (5), and the horizontal distance measuring laser module (2) on the base (3) corresponds to the position of the reflective sheet (4).

5. The device for rapidly measuring tunnel ellipticity and outputting results in real time according to claim 2 is characterized in that: An integrated data transmission module is arranged in the base (3), and the integrated data transmission module receives and transmits signals via Bluetooth.

6. The device for rapidly measuring tunnel ellipticity and outputting results in real time according to claim 2, characterized in that: The height adjustment structure is an adjustable height bolt (7) symmetrically arranged below the slide module (5), and the slide module (5) is placed in a horizontal state by adjusting the adjustable height bolt (7).

7. The device for rapidly measuring tunnel ellipticity and outputting results in real time according to claim 6 is characterized in that: A foot support (8) is installed below the adjustable height bolt (7), and the rear edges of the left and right foot supports (8) are aligned with the annular gap, which can ensure that the measured points are located at the same mileage.

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