A pipe-roof deflection testing device, method and control system

Abstract

The application belongs to the technical field of tunnel engineering monitoring, and specifically provides a pipe curtain deflection testing device, method and control system, which comprises an inclinometer tube, a loop tube, a pipe bottom assembly, a horizontal inclinometer, a power runner and a steel wire rope; the pipe bottom assembly comprises a pipe cover and a first turning pulley; the pipe cover is connected with one end of the inclinometer tube; the first turning pulley is rotatably connected with the pipe cover; the horizontal inclinometer is arranged in the inclinometer tube; the power runner is arranged on one side of the inclinometer tube, and the power runner comprises a power support, a second motor, a second turning pulley and a second transmission gear; the second transmission gear is mounted on the driving end of the second motor; a driven gear is also fixedly mounted on the second turning pulley; the steel wire rope is connected with the two ends of the first turning pulley, the second turning pulley, the loop tube and the horizontal inclinometer, respectively, and the horizontal displacement of the horizontal inclinometer in the inclinometer tube is driven by the second motor to realize the measurement of the vertical displacement of the horizontal pipe curtain.

Description

Technical Field

[0001] This invention belongs to the field of tunnel engineering monitoring technology, and relates to a pipe curtain deflection testing device, method and control system. Background Technology

[0002] With the acceleration of urbanization and the densification of transportation networks, the demand for new tunnels or box culverts passing under existing railway lines is increasing in areas with dense existing transportation facilities such as railways and subways. To reduce the impact of underground construction activities on existing structures, the pipe jacking method is commonly used. This method utilizes horizontal drilling and pipe jacking technology to insert support steel pipes or other prefabricated components around the proposed underground structure, forming an advanced support structure. This method effectively controls surface settlement and reduces the impact of construction on surface traffic. The pipe jacking employs a spiral-driven steel pipe follow-up process. After the steel pipes are pushed into place, concrete is poured inside to form a permanent isolation structure. As a protective structure for the underlying structure, the deflection deformation of the horizontal pipe jacking reflects the effectiveness of the isolation structure in protecting the existing structures.

[0003] However, existing technologies require manual operation of the inclinometer using steel bars or traction devices to monitor deflection. This method is inefficient, the data acquisition is unstable, and there is a certain lag, making it impossible to assess tunnel safety in real time. On the other hand, fixed inclinometers are expensive and cannot be repaired after damage, making them unsuitable for all projects. Automatic inspection instruments also suffer from malfunctions that can cause them to jam inside the inclinometer tube, affecting subsequent monitoring of the project.

[0004] Therefore, an automated monitoring device that is low in cost, provides continuous and effective data monitoring, and whose failure will not affect subsequent work is still needed to solve this problem. Summary of the Invention

[0005] The purpose of this invention is to provide an automated pipe curtain deflection testing device, method, and control system to solve the problems of inconvenient deflection monitoring of end-enclosed pipe curtains, low efficiency of traditional monitoring methods, and data acquisition lag. The device's built-in dual-power coordinated unit and wireless sensing system enable automated measurement of vertical displacement at various locations within the pipe curtain.

[0006] This invention provides a pipe curtain deflection testing device, including a clinometer tube, a return tube, a pipe bottom assembly, a horizontal clinometer, a power wheel, and a steel wire rope;

[0007] The inclinometer tube is configured as a hollow circular tube structure;

[0008] The return tube is configured as a hollow circular tube structure, and the outer surface of the return tube is fixedly connected to the outer surface of the inclinometer tube.

[0009] The tube bottom assembly includes a tube cap and a first steering pulley disposed on the tube cap; the tube cap is connected to one end of the inclinometer tube; the first steering pulley is rotatably connected to the tube cap via a first hinge seat;

[0010] The horizontal inclinometer is installed inside the inclinometer tube and is used to measure the vertical displacement of the horizontal tube curtain.

[0011] The power wheel is located on the side of the inclinometer tube away from the bottom assembly, and the power wheel includes a power support and a second motor, a second steering pulley, and a second transmission gear mounted on the power support. The fixed end of the second motor is fixedly mounted on the power support, and the second transmission gear is mounted on the driving end of the second motor. The second steering pulley is rotatably mounted on the power support, and a driven gear is also fixedly mounted on the second steering pulley. The second transmission gear is connected to the driven gear through a second transmission chain, so that the second steering pulley rotates under the drive of the second motor.

[0012] The steel wire rope passes through the first steering pulley, the second steering pulley, the return tube, and the two ends of the horizontal inclinometer, respectively, thereby driving the horizontal inclinometer to make horizontal displacement within the inclinometer tube through the drive of the second motor, thus realizing the measurement of the vertical displacement of the horizontal tube curtain.

[0013] Furthermore, the horizontal inclinometer includes an inclinometer body and a guide wheel assembly and a drive assembly disposed on the inclinometer body;

[0014] The guide wheel assembly has two sets of guide wheels spaced apart from each other along the central axis of the inclinometer tube. Each guide wheel assembly includes a connecting frame and guide wheels at both ends of the connecting frame. The two guide wheels are connected to each other by a transmission belt, and each guide wheel is rotatably connected to the connecting frame.

[0015] The drive assembly includes a first transmission gear, a first motor, and a rack. The first transmission gear has two parts corresponding to the two connecting frames. Each first transmission gear is fixedly connected to a single connecting frame, and the two first transmission gears are interconnected through a first transmission chain. The fixed end of the first motor is fixedly connected to the inclinometer body, and a drive wheel is installed on the drive end of the first motor. The drive wheel meshes with the first transmission chain. The rack is set on the inclinometer body and is arranged along the central axis of the inclinometer tube. The drive wheel and the two first transmission gears mesh with the rack, so that the guide wheel assembly is displaced along the central axis of the inclinometer tube by the drive of the first motor.

[0016] Furthermore, snap-fit ​​connectors are provided at both ends of the inclinometer body, and the two free ends of the wire rope are fixed to the inclinometer body through snap-fit ​​connectors.

[0017] Furthermore, a first groove for installing the return line tube is provided on the outer surface of the inclinometer tube;

[0018] A second groove for mounting guide wheels is also provided on the inner wall of the inclinometer tube.

[0019] Furthermore, a wear-resistant liner is provided at the part of the first steering pulley that comes into contact with the wire rope.

[0020] An anti-detachment rod is also provided on the pipe cover, and the anti-detachment rod is arranged opposite to the first steering pulley.

[0021] Furthermore, a tensioning assembly is also provided on the power support; the tensioning assembly is configured as a tensioning wheel structure.

[0022] As a further embodiment of the present invention, the tube curtain deflection testing device further includes a wiring assembly;

[0023] The cable routing assembly has at least two sets of cables spaced apart from each other along the central axis of the inclinometer tube. One set of cable routing assemblies is located near the bottom of the tube assembly, and the other set of cable routing assemblies is located near the power wheel. Each set of cable routing assemblies includes a connecting plate and a through hole for installing a steel wire rope at the center of the connecting plate. This hole is used to position the steel wire rope and prevent it from getting tangled inside the inclinometer tube.

[0024] Furthermore, the distance between one set of the wiring assembly and the end wall of the inclinometer tube near the bottom assembly is set to 20cm, and the distance between the other set of the wiring assembly and the end wall of the inclinometer tube near the power wheel is set to 20cm.

[0025] Furthermore, the single wiring assembly also includes at least two sets of self-resetting spring structures disposed on the connecting plate, the two sets of self-resetting spring structures being symmetrically arranged along the central bearing of the wiring hole.

[0026] As a further aspect of the present invention, the present invention also provides a method for testing the deflection of a tube curtain, comprising the following steps:

[0027] (I) Preparatory work;

[0028] Based on the layout of the horizontal tube curtain, install the tube curtain deflection testing device as described above.

[0029] The specific process for installing the pipe curtain deflection testing device is as follows:

[0030] Based on the layout of the horizontal pipe curtain, select the required length of inclinometer tube, install induction magnets at fixed intervals inside the inclinometer tube, and install the return tube parallel to the outer wall of the inclinometer tube, keeping the two equal in length;

[0031] Install the bottom assembly at the front end of the inclinometer tube;

[0032] A cable routing assembly is installed at a predetermined position on the inner wall of the inclinometer tube, and a self-resetting spring structure keeps the wire rope always in the center position of the inclinometer tube.

[0033] Select a steel wire rope of appropriate length as needed, and use a weight to pass the steel wire rope through the inside of the inclinometer tube, the center of the cable routing assembly, and the first steering pulley of the tube bottom assembly in sequence, and then through the upper return cable tube.

[0034] The horizontal inclinometer is fixed in the second groove of the inclinometer tube by the guide wheel and connected to the wire rope by the snap-fit ​​connector.

[0035] Install a power wheel at the tail end of the inclinometer tube;

[0036] (ii) Measure the vertical deflection of the horizontal pipe curtain;

[0037] The first motor of the horizontal inclinometer and the second motor of the power wheel start synchronously to drive the horizontal inclinometer to reciprocate along the central axis of the inclinometer tube under the traction of the wire rope;

[0038] During the movement of the horizontal inclinometer, the position sensor monitors and records the position, displacement value, and displacement velocity of the horizontal inclinometer in real time;

[0039] Based on the data obtained from real-time recording, the deflection curve of the horizontal tube curtain along the vertical direction is plotted.

[0040] As a further aspect of the present invention, the present invention also provides a pipe curtain deflection test and control system, which is applied to the pipe curtain deflection measuring device as described above, including a control module, a position detection module, a communication module and a monitoring terminal.

[0041] The control module is located inside the inclinometer body and is configured as an embedded microcontroller or PLC, used to receive measurement commands and control motion.

[0042] The position detection module includes at least two sets of position sensors disposed on the inclinometer body, used to acquire real-time position information, displacement information and displacement velocity information of the inclinometer body in the inclinometer tube;

[0043] The communication module is configured as a wireless communication unit, used to transmit the raw data collected by the position detection module to the monitoring terminal;

[0044] The monitoring terminal includes:

[0045] ① Fit the motion trajectory of the horizontal inclinometer based on the received raw data to obtain the smooth displacement-time curve of the horizontal inclinometer at each moment;

[0046] ② Based on the smooth displacement-time curve of the horizontal inclinometer at each moment, the deflection is calculated to obtain the continuous deflection distribution curve;

[0047] ③ Visualize the display.

[0048] Furthermore, the specific process of obtaining the smooth displacement-time curve of the horizontal inclinometer at each moment is as follows:

[0049] The raw data includes the trigger point sequence between the position sensor and the sensing magnet, the real-time position information of the position sensor, the displacement of the position sensor, the displacement velocity of the position sensor, and the timestamp when the communication module transmits the data.

[0050] Set the trigger point between a single position sensor and the sensing magnet as the positioning node, and set the real-time position information, displacement amount, and displacement velocity of the single position sensor as the single original point information.

[0051] By combining the information from multiple continuously collected original points and processing it in a time series, a set of original position points along the axis of the inclinometer tube is formed.

[0052] The multi-segment spline fitting method is used to fit and smooth the information of individual original points in the original location point set, so as to obtain the smooth displacement-time curve of the horizontal inclinometer at each moment.

[0053] Furthermore, the specific process for obtaining the continuous deflection distribution curve is as follows:

[0054] i. Based on the tilt angle detection unit built into the horizontal inclinometer, the tilt angle change information of the horizontal inclinometer during the displacement process is transmitted to the monitoring terminal; the tilt angle change information includes tilt angle data at several moments.

[0055] ii. The monitoring terminal aligns the tilt angle data at each moment with the information of a single raw point at each moment to obtain the tilt angle-position relationship curve and construct... The continuous function form, This is expressed as the change in inclination angle with the position of the inclinometer tube section;

[0056] iii. Based on the tilt angle-position relationship of the horizontal inclinometer, by... Integrating along the central axis of the inclinometer tube yields the relative displacement curve of the tube axis;

[0057] iv. Repeat steps ii and iii to process the tilt angle data and original point information at several times one by one to obtain several relative displacement curves of the pipe axis;

[0058] v. The relative displacement curves of several pipe axes are averaged, superimposed, and weighted in sequence to offset the influence of environmental disturbances on a single measurement, and finally the continuous deflection distribution curve is obtained.

[0059] Compared with the prior art, the present invention has the following beneficial effects:

[0060] (1) The pipe curtain deflection testing device provided by the present invention sets a return pipe with the same length as the pipe outside the inclinometer pipe, and uses a pulley in the front end pipe bottom assembly to turn the traction wire rope, so that the wire rope forms a complete closed loop. This avoids the wire rope from easily getting tangled in the pipe when it is long. Moreover, the present invention has the function of fully automatic measurement, and only one operator is needed to complete all measurement operations.

[0061] (2) In this invention, by setting up a wiring assembly, and the wiring assembly adopts a structure that combines a guide wheel with a self-resetting spring structure, the wire rope and the inclinometer's movement axis always pass through the center of the pipe, thus avoiding the wire rope from sweeping the wall, getting tangled, or getting stuck.

[0062] (3) In this invention, motors are respectively configured on the inclinometer body and the external power wheel, and synchronous coordination is achieved through the intelligent control system to reduce slack / slippage and positioning errors caused by the winding and unwinding of the tail end during long strokes.

[0063] (4) The testing device of this invention has more stable tension and more accurate positioning, and is especially suitable for long-distance, tortuous or high-friction pipe curtains. The inclinometer integrates an intelligent control system, which is superior to the data forwarding scheme that relies on external terminals / vehicle-mounted boxes in terms of automation. It is lighter to deploy and has stronger unattended operation capability. Moreover, the traction steel wire rope is made of high-strength anti-corrosion material and equipped with quick-release buckle connection, which can adapt to different underground environments.

[0064] In addition to the objectives, features, and advantages described above, the present invention has other objectives, features, and advantages. The invention will now be described in further detail with reference to the figures. Attached Figure Description

[0065] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0066] Figure 1 This is a schematic diagram of the overall structure of a tube curtain deflection testing device according to Embodiment 1 of the present invention;

[0067] Figure 2 yes Figure 1 Front view diagram;

[0068] Figure 3 yes Figure 1Schematic diagram of the structure of the bottom tube assembly;

[0069] Figure 4 yes Figure 1 Schematic diagram of a horizontal inclinometer;

[0070] Figure 5 This is a schematic diagram of the structure of a pipe curtain deflection testing and control system in Embodiment 3 of the present invention.

[0071] in:

[0072] 1. Inclinometer tube; 2. Return line tube; 3. Tube bottom assembly; 31. First steering pulley; 32. Wear-resistant liner; 33. Anti-detachment rod; 4. Cable routing assembly; 41. Self-resetting spring structure; 5. Horizontal inclinometer; 51. Guide wheel; 52. First transmission gear; 53. First motor; 54. Snap-on connector; 55. Transmission belt; 6. Power wheel; 61. Second motor; 62. Second steering pulley; 63. Second transmission gear; 64. Tensioning assembly; 7. Wire rope; 8. Position sensor; 81. Induction magnet. Detailed Implementation

[0073] To make the above-mentioned objectives, features, and advantages of the present invention clearer and easier to understand, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the accompanying drawings of the present invention are all in a simplified form and use non-precise proportions, and are only used to facilitate and clearly assist in illustrating the implementation of the present invention; the "several" mentioned in the present invention are not limited to the specific number shown in the examples in the accompanying drawings; the orientations or positional relationships indicated by terms such as "front," "middle," "rear," "left," "right," "up," "down," "top," "bottom," and "center" mentioned in the present invention are all based on the orientations or positional relationships shown in the accompanying drawings of the present invention, and do not indicate or imply that the device or component referred to must have a specific orientation, nor should they be construed as limitations on the present invention.

[0074] Example 1:

[0075] See Figures 1 to 4 As shown, the present invention provides a pipe curtain deflection testing device, specifically relating to an automated pipe curtain deflection testing device with dual-path coordinated control for end-closed pipe curtains; the pipe curtain deflection testing device includes a clinometer tube 1, a return tube 2, a pipe bottom assembly 3, a horizontal clinometer 5, a power wheel 6, and a steel wire rope 7;

[0076] The inclinometer tube 1 is configured as a hollow circular tube structure;

[0077] The return tube 2 is configured as a hollow circular tube structure, and the outer surface of the return tube 2 is fixedly connected to the outer surface of the inclinometer tube 1.

[0078] The tube bottom assembly 3 includes a tube cap and a first steering pulley 31 disposed on the tube cap; the tube cap is connected to one end of the inclinometer tube 1; the first steering pulley 31 is rotatably connected to the tube cap through a first hinge seat;

[0079] The horizontal inclinometer 5 is installed inside the inclinometer tube 1 and is used to measure the vertical displacement of the horizontal tube curtain; specifically, the horizontal inclinometer 5 includes an inclinometer body and a guide wheel assembly and a drive assembly installed on the inclinometer body;

[0080] The guide wheel assembly has two sets of guide wheels spaced apart from each other along the central axis of the inclinometer tube 1. Each set of guide wheels includes a connecting frame and guide wheels 51 located at both ends of the connecting frame. The two guide wheels 51 are connected to each other by a transmission belt 55, and each guide wheel 51 is rotatably connected to the connecting frame.

[0081] The drive assembly includes a first transmission gear 52, a first motor 53, and a rack. The first transmission gear 52 has two parts corresponding to the two connecting frames. Each first transmission gear 52 is fixedly connected to a single connecting frame, and the two first transmission gears 52 are interconnected through a first transmission chain. The fixed end of the first motor 53 is fixedly connected to the inclinometer body, and a drive wheel is installed on the drive end of the first motor 53. The drive wheel meshes with the first transmission chain. The rack is set on the inclinometer body and is arranged along the central axis of the inclinometer tube 1. The drive wheel and the two first transmission gears 52 mesh with the rack so that the guide wheel assembly is displaced along the central axis of the inclinometer tube 1 by the drive of the first motor 53.

[0082] The power wheel 6 is located on the side of the inclinometer tube 1 away from the tube bottom assembly 3, and the power wheel 6 includes a power support and a second motor 61, a second steering pulley 62 and a second transmission gear 63 mounted on the power support;

[0083] The fixed end of the second motor 61 is fixedly mounted on the power bracket, and the driving end of the second motor 61 is equipped with a second transmission gear 63; the second steering pulley 62 is rotatably mounted on the power bracket, and a driven gear is also fixedly mounted on the second steering pulley 62; the second transmission gear 63 is connected to the driven gear through a second transmission chain, so that the second steering pulley 62 is driven by the second motor 61 to rotate.

[0084] The steel wire rope 7 passes through the first steering pulley 31, the second steering pulley 62, the return tube 2, and the two ends of the horizontal inclinometer 5, respectively, thereby driving the horizontal inclinometer 5 to make horizontal displacement within the inclinometer tube 1 through the drive of the second motor 61, so as to measure the vertical displacement of the horizontal tube curtain.

[0085] Preferably, a first groove for installing the return tube 2 is provided on the outer surface of the inclinometer tube 1; and a second groove for installing the guide wheel 51 is also provided on the inner wall of the inclinometer tube 1.

[0086] Preferably, the length of the return tube 2 is the same as the length of the inclinometer tube 1.

[0087] Preferably, in order to increase the wear resistance of the first steering pulley 31, a wear-resistant liner 32 is provided at the part of the first steering pulley 31 that comes into contact with the wire rope 7, thereby extending the service life of the first steering pulley 31.

[0088] Preferably, in order to prevent the wire rope 7 from detaching from the first steering pulley 31 during movement, an anti-detachment rod 33 is also provided at the position corresponding to the first steering pulley 31 on the pipe cover. The anti-detachment rod 33 limits the wire rope 7 to prevent the wire rope 7 from falling off during operation, thereby causing the pipe curtain deflection testing device to jam.

[0089] Preferably, to achieve a fixed connection between the wire rope 7 and the inclinometer body, snap-fit ​​connectors 54 are respectively provided at both ends of the inclinometer body. The two free ends of the wire rope 7 are fixed to the inclinometer body through the snap-fit ​​connectors 54, thereby improving assembly and disassembly efficiency while ensuring connection stability. Specifically, the specific structure of the snap-fit ​​connector 54 refers to the prior art.

[0090] Preferably, to adjust the tension of the wire rope 7, a tensioning component 64 is also provided on the power support; the tensioning component 64 is preferably configured as a tensioning wheel structure, which maintains the wire rope in a taut state by winding or loosening the wire rope, preventing the wire rope from tangling. Specifically, the specific structure of the tensioning component 64 refers to the prior art.

[0091] As a further embodiment of the present invention, in order to prevent the wire rope 7 from getting tangled inside the inclinometer tube 1, the tube curtain deflection testing device also includes a wiring assembly 4.

[0092] The cable routing assembly 4 is provided with at least two sets of cable routing assemblies spaced apart from each other along the central axis of the inclinometer tube 1. One set of cable routing assemblies 4 is located near the bottom assembly 3, and the other set of cable routing assemblies 4 is located near the power wheel 6. Each set of cable routing assemblies 4 includes a connecting plate and a through hole for installing the wire rope 7 at the center of the connecting plate. This hole is used to position the wire rope 7 and prevent it from getting tangled inside the inclinometer tube 1.

[0093] Preferably, the distance between one set of the cable routing assembly 4 and the end wall of the inclinometer tube 1 near the bottom assembly 3 is preferably set to 20cm, and the distance between the other set of the cable routing assembly 4 and the end wall of the inclinometer tube 1 near the power wheel 6 is preferably set to 20cm. This ensures that the horizontal inclinometer 5 has sufficient measurement space within the inclinometer tube 1, and also controls the tension of the wire rope 7 by adjusting the distances between the cable routing assembly 4 and the first steering pulley 31 and between the cable routing assembly 4 and the second steering pulley 62, thereby preventing the wire rope 7 from getting tangled inside the inclinometer tube 1.

[0094] Further preferably, to further control the tension of the wire rope 7, the single-set cable assembly 4 also includes at least two sets of self-resetting spring structures 41 disposed on the connecting plate. The two sets of self-resetting spring structures 41 are symmetrically arranged along the central bearing of the cable threading hole, so as to clamp and pull the wire rope 7 through the spring force, thereby ensuring that the axial direction of the horizontal inclinometer 5 and the pulling direction of the wire rope 7 are always kept at the center of the inclinometer tube 1, so as to ensure effective measurement and measurement accuracy. Specifically, the specific structure of the self-resetting spring structure 41 refers to the prior art.

[0095] As a further embodiment of the present invention, in order to realize real-time monitoring of the position of the horizontal inclinometer 5, two sets of position sensors 8 are also provided on the main body of the inclinometer, which are spaced apart from each other along the central axis of the inclinometer tube 1. Multiple sets of induction magnets 81 are provided on the inner wall of the inclinometer tube 1, which are spaced apart from each other along its central axis. When the horizontal inclinometer 5 is displaced, the position sensors 8 realize the position detection of the horizontal inclinometer 5 by forming contact (triggering) or non-contact (non-triggering) with the induction magnets 81 at different positions.

[0096] Preferably, the spacing between two adjacent induction magnets 81 is set according to the length of the inclinometer tube 1. Specifically, in this embodiment, the spacing between two adjacent induction magnets 81 is set to 1m-1.5m.

[0097] Preferably, the position sensor 8 is disposed on the inner side of the guide wheel 51 and is used to detect the real-time position of the horizontal inclinometer 5.

[0098] As a further embodiment of the present invention, in order to adapt the wire rope 7 to different working environments, the wire rope 7 is made of high-strength corrosion-resistant material.

[0099] Example 2:

[0100] The present invention also provides a method for testing the deflection of a tube curtain, comprising the following steps:

[0101] (I) Preparatory work;

[0102] Based on the layout of the horizontal tube curtain, install the tube curtain deflection testing device as described in Example 1.

[0103] The specific process for installing the pipe curtain deflection testing device is as follows:

[0104] Based on the layout of the horizontal pipe curtain, select the required length of inclinometer tube 1, install induction magnets 81 at fixed intervals inside the inclinometer tube 1, and install the return tube 2 parallel to the outer wall of the inclinometer tube 1, keeping the two of equal length.

[0105] A pipe bottom assembly 3 is installed at the front end of the inclinometer tube 1. Inside, there is a steering pulley, a wear-resistant liner 32 is laid, and an anti-derailment rod 33 is installed to ensure the stable steering of the wire rope 7.

[0106] A cable routing assembly 4 is installed at a predetermined position on the inner wall of the inclinometer tube 1, and the steel wire rope 7 is always kept in the center position of the inclinometer tube 1 by the self-resetting spring structure 41.

[0107] Select a steel wire rope 7 of appropriate length as needed, and use the weight to pass the steel wire rope 7 through the inside of the inclinometer tube 1, the center of the cable routing assembly 4, and the first steering pulley 31 of the tube bottom assembly 3 in sequence, and then through the upper return cable tube 2.

[0108] The horizontal inclinometer 5 is fixed in the second groove of the inclinometer tube 1 by the guide wheel 51 and connected to the wire rope 7 by the snap-fit ​​connector 54.

[0109] A power wheel 6 is installed at the tail end of the inclinometer tube 1, and the prestress of the wire rope 7 is adjusted by the tensioning assembly 64.

[0110] (ii) Measure the vertical deflection of the horizontal pipe curtain;

[0111] The first motor 53 of the horizontal inclinometer 5 and the second motor 61 of the power wheel 6 start synchronously to drive the horizontal inclinometer 5 to reciprocate along the central axis of the inclinometer tube 1 under the traction of the wire rope 7.

[0112] During the movement of the horizontal inclinometer 5, the position sensor 8 monitors and records the position, displacement value and displacement speed of the horizontal inclinometer 5 in real time;

[0113] Based on the data obtained from real-time recording, the deflection curve of the horizontal tube curtain along the vertical direction is plotted.

[0114] Preferably, if the built-in motor of the horizontal inclinometer 5 malfunctions, the external power wheel 6 can independently complete the traction work, preventing the inclinometer from becoming stuck inside the pipe and affecting subsequent pipe curtain deflection measurements. The wire rope 7 is made of high-strength, corrosion-resistant material, maintaining long-term performance even in damp underground environments. The cable routing assembly 4 effectively prevents the wire rope 7 from sweeping against the wall or getting tangled, improving the operational stability of the device. All components of the device adopt a modular design, allowing for quick replacement after damage, reducing maintenance costs.

[0115] Example 3:

[0116] See Figure 5 As shown, the present invention also provides a pipe curtain deflection measurement and control system, including a control module, a position detection module, a communication module and a monitoring terminal;

[0117] The control module is located inside the inclinometer body and is configured as an embedded microcontroller or PLC, used to receive measurement commands and control motion.

[0118] The position detection module includes at least two sets of position sensors 8 installed on the inclinometer body, used to acquire the real-time displacement and velocity of the inclinometer body in the inclinometer tube 1, and record the real-time data of the horizontal inclinometer 5 as raw data;

[0119] The communication module is configured as a wireless communication unit, used to transmit the raw data collected by the position detection module to the monitoring terminal;

[0120] The monitoring terminal includes:

[0121] ① Fit the motion trajectory of the horizontal inclinometer based on the received raw data to obtain the smooth displacement-time curve of the horizontal inclinometer at each moment;

[0122] ② Based on the smooth displacement-time curve of the horizontal inclinometer at each moment, the deflection is calculated to obtain the continuous deflection distribution curve;

[0123] ③ Visualize the display.

[0124] Preferably, the specific process for obtaining the smooth displacement-time curve of the horizontal inclinometer at each moment is as follows:

[0125] The raw data includes the trigger point sequence between the position sensor and the sensing magnet, the real-time position information of the position sensor, the displacement of the position sensor, the displacement velocity of the position sensor, and the timestamp when the communication module transmits the data.

[0126] Set the trigger point between a single position sensor and the sensing magnet as the positioning node, and set the real-time position information, displacement amount, and displacement velocity of the single position sensor as the single original point information.

[0127] By combining the information from multiple continuously collected original points and processing it in a time series, a set of original position points along the axis of the inclinometer tube is formed.

[0128] The multi-segment spline fitting method is used to fit and smooth the information of individual original points in the original location point set, so as to obtain the smooth displacement-time curve of the horizontal inclinometer at each moment.

[0129] Preferably, the specific process for obtaining the continuous deflection distribution curve is as follows:

[0130] i. Based on the tilt angle detection unit built into the horizontal inclinometer, the tilt angle change information of the horizontal inclinometer during the displacement process is transmitted to the monitoring terminal; the tilt angle change information includes tilt angle data at several moments.

[0131] ii. The monitoring terminal aligns the tilt angle data at each moment with the information of a single raw point at each moment to obtain the tilt angle-position relationship curve and construct... The continuous function form, This is expressed as the change in inclination angle with the position of the inclinometer tube section;

[0132] iii. Based on the tilt angle-position relationship of the horizontal inclinometer, by... Integrating along the central axis of the inclinometer tube yields the relative displacement curve of the tube axis;

[0133] iv. Repeat steps ii and iii to process the tilt angle data and original point information at several times one by one to obtain several relative displacement curves of the pipe axis;

[0134] v. The relative displacement curves of several pipe axes are averaged, superimposed, and weighted sequentially to offset the influence of environmental disturbances on a single measurement, and finally a high-precision continuous deflection distribution curve is obtained.

[0135] Further optimized, the final continuous deflection distribution curve is formed by fusing the following three types of data:

[0136] 1. The time series of inclination angles recorded by the horizontal inclinometer 5 as it moves back and forth along the pipeline;

[0137] 2. The absolute positioning reference provided by position sensor 8 and magnetic trigger point;

[0138] 3. Repeated curves from multiple round trip measurements are fitted and weighted averaged to improve stability. The continuous deflection distribution curve reflects the real-time, spatially continuous deflection deformation state of the inclinometer along the entire length of the pipe curtain.

[0139] Furthermore, after obtaining the continuous deflection distribution curve, the monitoring terminal can: automatically identify abnormal deflection segments, settlement concentration areas, and abrupt change points; compare and analyze deflection curves measured at different times to form a deflection change trend chart; output early warning information to determine whether the pipe jacking has experienced excessive deformation; generate visual reports to support structural safety assessments by construction and monitoring units; and link with external monitoring systems (such as ground settlement and shield tunneling attitude monitoring) to achieve comprehensive early warning. Through trajectory fitting, integral deflection calculation, and multiple measurement superposition corrections, the monitoring terminal can generate high-precision continuous deflection monitoring curves, forming a real-time, full-process, and traceable monitoring system for the deformation state of the pipe jacking.

[0140] Preferably, the multi-point data can be reconstructed using interpolation or fitting algorithms to reconstruct the complete movement trajectory of the inclinometer at each moment. This method can accurately determine the real-time position of the inclinometer tube 1.

[0141] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A duct deflection testing apparatus, characterised in that, The utility model relates to a horizontal inclinometer system, including inclinometer tube (1), loop tube (2), pipe bottom subassembly (3), horizontal inclinometer (5), power runner (6) and steel wire rope (7). The inclinometer tube (1) is provided as a hollow circular tube structure. The loop tube (2) is provided as a hollow circular tube structure, and the outer surface of the loop tube (2) and the outer surface of the inclinometer tube (1) are fixedly connected with each other. The pipe bottom subassembly (3) includes a pipe cover and a first diverting pulley (31) arranged on the pipe cover. The horizontal inclinometer (5) is arranged in the inclinometer tube (1) and is used for measuring the vertical displacement of the horizontal pipe curtain. The power runner (6) is arranged on the side of the inclinometer tube (1) away from the pipe bottom subassembly (3), and the power runner (6) includes a power support and a second motor (61), a second diverting pulley (62) and a second transmission gear (63) arranged on the power support. One end of the steel wire rope (7) is connected to one end of the horizontal inclinometer (5), the steel wire rope (7) is sequentially wound around the first diverting pulley (31), the loop tube (2), the second diverting pulley (62) and the other end of the horizontal inclinometer (5), so that the horizontal inclinometer (5) is driven to horizontally displace in the inclinometer tube (1) by the second motor (61), and the vertical displacement of the horizontal pipe curtain is measured.

2. A tunnel canopy deflection testing apparatus according to claim 1, wherein, The horizontal inclinometer (5) includes an inclinometer main body and a guide wheel set and a driving assembly arranged on the inclinometer main body. The guide wheel set is provided with two groups of guide wheels (51) spaced apart along the central axis direction of the inclinometer tube (1), and each group of guide wheels (51) includes a connecting frame and a guide wheel (51) arranged at both ends of the connecting frame. The two guide wheels (51) are connected to each other by a transmission belt (55), and each guide wheel (51) is rotatably connected to the connecting frame. The driving assembly comprises a first transmission gear (52), a first motor (53) and a rack; the first transmission gear (52) is provided with two pieces corresponding to two connecting frames, a single piece of the first transmission gear (52) is fixedly connected with a single connecting frame, and the two pieces of the first transmission gear (52) are connected with each other through a first transmission chain; the fixed end of the first motor (53) is fixedly connected with the inclinometer main body, the driving end of the first motor (53) is provided with a driving wheel, and the driving wheel is engaged with the first transmission chain; the rack is arranged on the inclinometer main body, and the rack is arranged along the central axis direction of the inclinometer tube (1); the driving wheel and the two pieces of the first transmission gear (52) are engaged with the rack, so that the guide wheel set is driven to displace along the central axis direction of the inclinometer tube (1) by the first motor (53).

3. A tunnel rigging deflection testing apparatus according to claim 2, characterised in that, The two free ends of the steel wire rope (7) are fixedly connected with the inclinometer main body through the buckle type connecting pieces (54) respectively.

4. A tunnel canopy deflection testing apparatus according to any one of claims 1 to 3, wherein, A first groove for mounting the return tube (2) is arranged on the outer surface of the inclinometer tube (1); A second groove for mounting the guide wheel (51) is further arranged on the inner wall of the inclinometer tube (1).

5. A tunnel curtain deflection testing apparatus according to claim 4, wherein, A wear-resistant lining plate (32) is further arranged at the part of the first turning pulley (31) for contacting the steel wire rope (7); A anti-falling rod (33) is further arranged on the pipe cover, and the anti-falling rod (33) is arranged opposite to the first turning pulley (31).

6. The tunnel lining deflection testing apparatus of claim 4, wherein, A tensioning assembly (64) is further arranged on the power support; the tensioning assembly (64) is arranged in the form of a tensioning wheel structure.

7. A tunnel curtain deflection testing apparatus according to claim 5 or 6, wherein, The wire arrangement assembly (4) is arranged on the inclinometer tube (1) and comprises at least two groups of wire arrangement assemblies (4) arranged at intervals along the central axis direction of the inclinometer tube (1), one group of the wire arrangement assemblies (4) is arranged close to the pipe bottom assembly (3), and the other group of the wire arrangement assemblies (4) is arranged close to the power turning wheel (6); each group of the wire arrangement assemblies (4) comprises a connecting plate and a threading hole arranged in the center of the connecting plate for penetrating and mounting the steel wire rope (7), so as to position the steel wire rope (7) and prevent the steel wire rope (7) from being knotted in the inclinometer tube (1). The distance between one group of the wire arrangement assemblies (4) and the end wall of the inclinometer tube (1) close to the pipe bottom assembly (3) is 20 cm, and the distance between the other group of the wire arrangement assemblies (4) and the end wall of the inclinometer tube (1) close to the power turning wheel (6) is 20 cm.

8. A tunnel curtain deflection testing apparatus according to claim 7, characterised in that, Each group of the wire arrangement assemblies (4) further comprises at least two groups of self-resetting spring structures (41) arranged on the connecting plate and symmetrically arranged along the central bearing of the threading hole.

9. A pipe canopy deflection testing apparatus according to claim 8, wherein, The method comprises the following steps:

10. A method of testing the deflection of a pipe curtain, characterised by, (I) preparation work; based on the layout of the horizontal pipe curtain, the pipe curtain deflection testing device according to claim 9 is installed; the specific process of installing the pipe curtain deflection testing device is as follows: based on the layout of the horizontal pipe curtain, an inclinometer tube (1) with a required length is selected, induction magnets (81) are fixedly arranged in the inclinometer tube (1) at intervals, and a return tube (2) is arranged parallel to the outer wall of the inclinometer tube (1), and the two tubes are kept equal in length; a pipe bottom assembly (3) is arranged at the front end of the inclinometer tube (1); ​ A wire assembly (4) is installed at a predetermined position on the inner wall of the inclinometer casing (1), and a self-resetting spring structure (41) is used to keep the steel wire rope (7) always in the center of the inclinometer casing (1); According to the needs, a steel wire rope (7) of appropriate length is selected, and the heavy steel wire rope (7) is sequentially threaded through the inside of the inclinometer casing (1), the center of the wire assembly (4), and the first diverting pulley (31) of the pipe bottom assembly (3), and then threaded through the upper return pipe (2); The horizontal inclinometer (5) is fixed in the second groove of the inclinometer casing (1) through a guide wheel (51), and is connected with the steel wire rope (7) through a buckle type connector (54); A power pulley (6) is installed at the tail end of the inclinometer casing (1); (2) The vertical deflection of the horizontal pipe curtain is measured; The first motor (53) of the horizontal inclinometer (5) and the second motor (61) of the power pulley (6) are started synchronously to drive the horizontal inclinometer (5) to move back and forth along the central axis of the inclinometer casing (1) under the traction of the steel wire rope (7); During the movement of the horizontal inclinometer (5), the position sensor (8) monitors and records the position, displacement value and displacement speed of the horizontal inclinometer (5) in real time; Based on the data recorded in real time, the deflection curve of the horizontal pipe curtain along the vertical direction is drawn.

11. A pipe-roof deflection test control system applied to the pipe-roof deflection test device according to claim 9, characterized in that, It comprises a control module, a position detection module, a communication module and a monitoring terminal; The control module is arranged in the inclinometer main body and is an embedded single-chip microcomputer or PLC, which is used to receive measurement instructions and control movement; The position detection module comprises at least two groups of position sensors arranged on the inclinometer main body, which is used to obtain real-time position information, displacement information and displacement speed information of the inclinometer main body in the inclinometer casing; The communication module is a wireless communication unit, which is used to transmit the original data collected by the position detection module to the monitoring terminal; The monitoring terminal comprises: ① The motion trajectory of the horizontal inclinometer is fitted based on the received original data to obtain a smooth displacement-time curve of the horizontal inclinometer at each moment; ② The deflection is calculated based on the smooth displacement-time curve of the horizontal inclinometer at each moment to obtain a continuous deflection distribution curve; ③ Visual display is performed.

12. A pipe-roof deflection testing control system according to claim 11, characterised in that, The specific process of obtaining the smooth displacement-time curve of the horizontal inclinometer at each moment is as follows: The original data comprises a sequence of trigger points between the position sensor and the sensing magnet, real-time position information of the position sensor, displacement of the position sensor, displacement speed of the position sensor and time stamp when the communication module transmits; The trigger points between the single position sensor and the sensing magnet are set as positioning nodes, and the real-time position information of the single position sensor, the displacement of the position sensor and the displacement speed of the position sensor are set as single original point information; The multiple original point information collected continuously is time-sequenced to form an original position point set along the axial direction of the inclinometer casing; The single original point information in the original position point set is fitted and smoothed by using a multi-segment spline fitting method to obtain a smooth displacement-time curve of the horizontal inclinometer at each moment.

13. A pipe-roof deflection testing control system according to claim 12, characterised in that, The specific process of obtaining the continuous deflection distribution curve is as follows: i. Based on the inclination detection unit in the horizontal inclinometer, the inclination change information of the horizontal inclinometer in the displacement process is transmitted to the monitoring terminal; the inclination change information includes inclination data at several time points; ii. The monitoring terminal aligns the dip angle data at each moment with the single original point information at each moment to obtain a dip angle-position relationship curve and construct a continuous function form of which represents the change of the inclination angle with the position of the inclinometer tube section.​ iii. According to the inclination-position relationship of the horizontal inclinometer, by means of the formula Integrating in the direction of the central axis of the inclinometer tube, the relative displacement curve of the tube axis is obtained; iv. Repeat steps ii and iii, and process the inclination data at several time points and the original point information one by one to obtain the relative displacement curves of the several pipe axes; v. The relative displacement curves of the several pipe axes are sequentially averaged, superimposed and weight analyzed to offset the influence of environmental disturbance on single measurement, and finally the continuous deflection distribution curve is obtained.

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