Handheld segment local deformation measuring device

Abstract

The utility model discloses a handheld segment local deformation measuring device, which comprises a measuring slide rail, a data acquisition trolley arranged on the measuring slide rail, and a data acquisition mechanism arranged in the data acquisition trolley. According to the utility model, the handheld design is adopted, the operation is simple and convenient, the device can be rapidly deployed to the segment measurement position, the precise measurement of the local part of the segment is realized through the cooperation of the slide rail and the data acquisition trolley, and compared with the traditional measurement method, the measurement efficiency and the real-time performance are greatly improved, the manual operation error is reduced, and the measurement accuracy is improved. Reliable guarantee is provided for safe operation and maintenance of tunnel engineering, the laser displacement sensor has the advantages of being high in precision and sampling frequency, distance data between the inner surface of the duct piece and the sensor can be obtained in real time, and therefore the local deformation condition of the duct piece can be accurately reflected; and the data can be timely uploaded to the cloud, so that engineers can conveniently check and analyze the data anytime and anywhere.

Description

Technical Field

[0001] This utility model relates to the field of tunnel engineering inspection technology, and in particular to a handheld segment local deformation measuring device. Background Technology

[0002] In tunnel engineering, tunnel segments are the basic prefabricated units that make up the tunnel lining structure. They are usually made of reinforced concrete, steel or composite materials and are assembled to form a ring support system. During the construction and later operation and maintenance of tunnel projects, local deformation >5mm may cause a chain of instability. Bolt shear deformation or concrete crushing will reduce the circumferential stiffness and cause overall settlement. Therefore, monitoring the local deformation of tunnel segments is crucial.

[0003] Traditional measurement methods suffer from low efficiency and poor real-time performance, making it difficult to meet the high precision and real-time requirements of modern tunnel engineering for segment deformation monitoring. Therefore, developing an efficient, convenient, and accurate handheld segment local deformation measurement device is of great significance.

[0004] A portable tunnel lining inspection device is disclosed in Chinese patent document CN206348661U. This portable tunnel lining inspection device integrates a walking mechanism (3), an air suction device (4), a power supply module, and a ground-penetrating radar (2). The air suction device (4) and the ground-penetrating radar (2) are both fixed to the walking mechanism (3). The walking mechanism (3) can drive the portable tunnel lining inspection device to move on the tunnel lining surface (10). The lower end of the walking mechanism (3) is provided with a vacuum sponge suction device (1) for adsorbing onto the tunnel lining surface (10). This portable tunnel lining inspection device can be operated independently by one person. It can select different measuring lines for tunnel inspection in the direction of travel, and can also inspect circumferential tunnel lining. It is fast, highly adaptable to the tunnel surface condition, requires short preparation time, does not have heavy auxiliary equipment, can directly cross obstacles, is highly efficient, lightweight, has stable adsorption, and is completely wirelessly transmitted for remote control. It does not need to consider a series of problems such as interference when inspecting with spatial cables. However, this portable tunnel lining inspection device has low efficiency and poor real-time performance. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of traditional measurement methods that cannot meet the high precision and real-time requirements of modern tunnel engineering for segment deformation monitoring, and to provide a handheld segment local deformation measurement device that achieves the technical effect of efficient, convenient and accurate measurement of segment local deformation.

[0006] The objective of this utility model is achieved through the following technical solution:

[0007] A handheld segment local deformation measuring device includes a measuring slide rail, a data acquisition trolley mounted on the measuring slide rail, and a data acquisition mechanism mounted inside the data acquisition trolley.

[0008] The radius of curvature of the measuring slide rail is equal to that of the standard tunnel segment, and the radius of the measuring slide rail is consistent with the radius of the measuring tunnel. By setting a measuring slide rail with the same radius of curvature as the standard tunnel segment, the sliding surface of the data acquisition trolley on the measuring slide rail is adapted to the surface of the standard tunnel segment. By using the data acquisition mechanism to measure the distance between the data acquisition trolley and the inner wall of the tunnel segment, it is possible to measure whether the tunnel segment has deformed and the degree of deformation. This local deformation measuring device is simple to operate and can measure the deformation of the tunnel segment without damaging it.

[0009] The data acquisition mechanism includes a laser displacement sensor, a data storage device, and a battery, all fixedly connected inside the data acquisition vehicle.

[0010] The battery provides power to the laser displacement sensor and the data storage device. The data storage device is electrically connected to the laser displacement sensor. The data storage device stores and uploads the measurement data of the laser displacement sensor to the cloud. The deformation of the tube segment is determined by the change in distance between the data acquisition trolley and the inner wall of the tube segment during the movement process.

[0011] The laser displacement sensor continuously samples along the measuring slide rail with a sampling period of 2ms. The data collected by the laser displacement sensor is automatically transmitted to the data storage device and then automatically uploaded to the cloud. The local deformation value of the pipe segment is obtained based on the measurement data. By controlling the laser displacement sensor to measure the distance between the data acquisition trolley and the pipe segment at equal intervals and making the data acquisition trolley move at a constant speed on the measuring slide rail, the local deformation details of the pipe segment can be accurately captured, avoiding missed abrupt changes and improving detection accuracy.

[0012] An opening is provided at the center of the bottom of the data acquisition vehicle. The position of the opening corresponds to the sensing end of the laser displacement sensor. By providing an opening at the bottom of the data acquisition vehicle, the sensing end of the laser displacement sensor is exposed, enabling distance measurement of the tube below.

[0013] The battery is a rechargeable lithium battery, and the laser displacement sensor is a FUWEI FSD11 laser displacement sensor.

[0014] The data acquisition trolley has rotatably connected casters around its bottom. The trolley is slidably connected to the measuring slide rail via the casters. The casters allow the trolley to slide along the measuring slide rail, measuring the distance between the trolley and the tunnel segment during the movement. Limiting grooves adapted to the casters are provided on the measuring slide rail, allowing the casters to slide along the curved surface of the measuring slide rail. This prevents the casters and the trolley from deviating during the sliding process, which could affect the measurement accuracy.

[0015] Positive and beneficial effects:

[0016] 1. This handheld segment local deformation measuring device adopts a handheld design, is easy to operate, and can be quickly deployed to the segment measurement location. Through the cooperation of the slide rail and the data acquisition trolley, it can achieve accurate measurement of the segment. Compared with traditional measurement methods, it greatly improves measurement efficiency and real-time performance, reduces human operation errors, and provides a reliable guarantee for the safe operation and maintenance of tunnel engineering.

[0017] 2. This handheld segment local deformation measurement device features a laser displacement sensor with high precision and high sampling frequency, which can acquire the distance data between the inner surface of the segment and the sensor in real time, thereby accurately reflecting the local deformation of the segment.

[0018] 3. This handheld segment local deformation measurement device can not only store a large amount of measurement data, but also upload it to the cloud in a timely manner, so that engineers can view and analyze the data anytime and anywhere, providing strong support for the safety assessment and maintenance decision-making of tunnel segments. Attached Figure Description

[0019] Figure 1 This is the overall layout diagram of the present utility model;

[0020] Figure 2 This is a diagram of the measuring slide rail and data acquisition trolley of this utility model;

[0021] Figure 3 This is an internal view of the data acquisition vehicle.

[0022] In the diagram: 1-measuring slide rail, 2-data acquisition trolley, 21-moving wheel, 22-laser displacement sensor, 23-data storage device, 24-battery, 25-opening. Detailed Implementation

[0023] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model. Example 1

[0024] like Figures 1 to 3 As shown, a handheld segment local deformation measuring device includes a measuring slide rail 1, a data acquisition trolley 2 mounted on the measuring slide rail 1, and a data acquisition mechanism mounted inside the data acquisition trolley 2.

[0025] like Figure 1 As shown, the radius of curvature of the measuring slide rail 1 is equal to that of the standard segment, and the radius of the measuring slide rail 1 is consistent with the radius of the measuring tunnel. By setting the measuring slide rail 1 with the same radius of curvature as the standard segment, the sliding surface of the data acquisition trolley 2 on the measuring slide rail 1 is adapted to the surface of the standard segment. By using the data acquisition mechanism to measure the distance between the data acquisition trolley 2 and the inner wall of the segment, it is possible to measure whether the segment has deformed and the degree of deformation. This local deformation measuring device is simple to operate and can measure the deformation of the segment without damaging it.

[0026] Furthermore, suction cups or other structures that can fix the measuring slide rail 1 to the tube segment are set at the bottom of both ends of the measuring slide rail 1. When performing deformation measurement, the handheld measuring slide rail 1 is fixedly connected to the tube segment being measured. The suction cup adsorption fixation method is quick and will not damage the tube segment, enabling the handheld measuring device to be quickly fixed for deformation measurement, making the installation and use of the deformation measuring device more efficient and convenient.

[0027] Furthermore, an air curtain device is installed on the laser displacement sensor 22 to spray 0.2MPa compressed gas to isolate water mist and avoid the laser sensor being easily interfered with by water mist in the humid environment of the tunnel. Example 2

[0028] like Figure 3 As shown, the data acquisition mechanism includes a laser displacement sensor 22, a data storage device 23, and a battery 24, which are fixedly connected inside the data acquisition vehicle 2.

[0029] Battery 24 provides power to laser displacement sensor 22 and data storage device 23. Data storage device 23 is electrically connected to laser displacement sensor 22. Data storage device 23 stores the measurement data of laser displacement sensor 22 and uploads it to the cloud. By setting up a data acquisition mechanism consisting of laser displacement sensor 22, data storage device 23 and battery 24 in data acquisition vehicle 2, the distance change between laser displacement sensor 22 and inner surface of tube segment is collected. Data storage device 23 stores and uploads the data. The deformation of tube segment is determined by the distance change between the data acquisition vehicle and the inner wall of tube segment during the movement process.

[0030] like Figure 3As shown, the laser displacement sensor 22 continuously samples in the direction of the measuring slide rail 1 with a sampling period of 2ms. The data collected by the laser displacement sensor 22 is automatically transmitted to the data storage 23 and then automatically uploaded to the cloud. The local deformation value of the pipe segment is obtained based on the measurement data. By controlling the laser displacement sensor 22 to measure the distance from the data acquisition carriage 2 to the pipe segment at equal time intervals, and making the data acquisition carriage move at a constant speed on the measuring slide rail 1, the sampling period of 2ms (500Hz) is much higher than that of traditional manual measurement (usually >1s) and conventional sensors (such as total station sampling of about 100-200ms). It can accurately capture the details of local deformation of the pipe segment, avoid missing abrupt change signals, improve detection accuracy, and the data acquisition carriage can still collect enough data information even when moving rapidly during the detection process, so as to achieve efficient and accurate deformation measurement of the pipe segment.

[0031] like Figure 3 As shown, an opening 25 is provided at the center of the bottom of the data acquisition vehicle 2. The position of the opening 25 corresponds to the position of the sensing end of the laser displacement sensor 22. By setting the opening 25 at the bottom of the data acquisition vehicle 2, the sensing end of the laser displacement sensor 22 is exposed, enabling distance measurement of the tube below.

[0032] Furthermore, the middle part of the measuring slide rail 1 is hollowed out or made of transparent material, so that the measuring laser of the laser displacement sensor 22 can pass through the measuring slide rail 1 to measure the distance between the tube and the laser displacement sensor 22. The battery 24 is marked with a temperature range (-10℃~50℃) to avoid low temperature shutdown. Example 3

[0033] Battery 24 is a rechargeable lithium battery, and laser displacement sensor 22 is a FUWEI FSD11 laser displacement sensor. The FSD11 has a static repeatability of 0.15μm (tested on a standard ceramic sample) and a linear error of ±0.02% FS. Its laser triangulation measurement principle analyzes displacement through reflected light signals. It is not sensitive to unevenness or tilt on the surface of the tunnel segment and can adapt to the complex morphology of the tunnel wall. Compared with traditional caliper measurement (human error ±0.5mm), the accuracy is improved by more than 10 times.

[0034] like Figure 3 As shown, the bottom of the data acquisition trolley 2 is rotatably connected with movable wheels 21 on all four sides. The data acquisition trolley 2 is slidably connected to the measuring slide rail 1 through the movable wheels 21. By setting the movable wheels 21, the data acquisition trolley 2 slides on the measuring slide rail 1. During the movement, the distance between the data acquisition trolley 2 and the tube segment is measured. The measuring slide rail 1 is provided with a limiting groove that matches the movable wheels 21, so that the movable wheels 21 can slide along the curved surface of the measuring slide rail 1. This avoids the situation where the movable wheels 21 and the data acquisition trolley 2 deviate during the sliding process on the measuring slide rail 1, which would affect the measurement accuracy.

[0035] Furthermore, a small motor is used to drive the moving wheels 21, so that the data acquisition trolley 2 is driven by the motor during movement, and the speed of the data acquisition trolley is closer to a constant speed, thereby avoiding the situation where the trolley does not slide at a constant speed due to manual sliding of the data acquisition trolley 2, which would affect the movement speed.

[0036] The working principle of this utility model is as follows:

[0037] S1. The sliding surface of the data acquisition trolley 2 on the measuring slide rail 1 is adapted to the surface of the standard pipe segment. By using the data acquisition mechanism to measure the distance between the data acquisition trolley 2 and the inner wall of the pipe segment, it is possible to measure whether the pipe segment has deformed and the degree of deformation.

[0038] S2. The distance change between the laser displacement sensor 22 and the inner surface of the tube segment is collected, and the data is stored and uploaded by the data storage device 23. The deformation of the tube segment is determined by the distance change between the data acquisition trolley and the inner wall of the tube segment during the movement process.

[0039] The above description is only used to illustrate the technical solution of this utility model and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A handheld segment local deformation measuring device, comprising a measuring slide rail (1) and a data acquisition trolley (2) mounted on the measuring slide rail (1), characterized in that: It also includes a data acquisition mechanism installed inside the data acquisition vehicle (2).

2. The handheld segment local deformation measuring device according to claim 1, characterized in that: The radius of curvature of the measuring slide rail (1) is equal to the radius of curvature of the standard tunnel segment, and the radius of the measuring slide rail (1) is consistent with the radius of the measuring tunnel.

3. The handheld segment local deformation measuring device according to claim 1, characterized in that: The data acquisition mechanism includes a laser displacement sensor (22), a data storage device (23), and a battery (24) fixedly connected to the data acquisition vehicle (2). The battery (24) provides power to the laser displacement sensor (22) and the data storage device (23). The data storage device (23) is electrically connected to the laser displacement sensor (22). The data storage device (23) stores the measurement data of the laser displacement sensor (22) and uploads it to the cloud.

4. The handheld segment local deformation measuring device according to claim 3, characterized in that: The laser displacement sensor (22) continuously samples in the direction of the measuring slide rail (1) with a sampling period of 2ms. The data collected by the laser displacement sensor (22) is automatically transmitted to the data storage device (23) and then automatically uploaded to the cloud. The local deformation value of the pipe segment is obtained based on the measurement data.

5. The handheld segment local deformation measuring device according to claim 4, characterized in that: An opening (25) is provided at the center of the bottom of the data acquisition vehicle (2), and the position of the opening (25) corresponds to the sensing end position of the laser displacement sensor (22).

6. A handheld segment local deformation measuring device according to claim 3, characterized in that: The battery (24) is a rechargeable lithium battery, and the laser displacement sensor (22) is a FUWEI FSD11 laser displacement sensor.

7. The handheld segment local deformation measuring device according to claim 1, characterized in that: The data acquisition trolley (2) has rotatable wheels (21) connected to its bottom four sides, and the data acquisition trolley (2) is slidably connected to the measuring slide rail (1) through the rotatable wheels (21).

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