Wireless displacement sensor used in foundation pile load test

Abstract

The invention discloses a wireless displacement sensor used in a foundation pile load test, and relates to the technical field of displacement sensors, and the wireless displacement sensor comprises a housing and a horizontal adjustment assembly. An elevation acquisition module, a wireless transmission module and a mobile power supply are installed in the shell, and a touch display screen is installed on the front side of the shell; the horizontal adjusting assembly comprises a fixing column, a connecting ball and a connecting column, a groove is formed in the upper end of the fixing column, the connecting ball is arranged in the groove, the connecting column is fixed to the upper end of the surface of the connecting ball, the upper end of the connecting column is fixed to the lower side of the shell, and a supporting assembly is installed at the lower end of the fixing column. The high-precision displacement sensor does not need a datum beam, supports wireless transmission and is fast to install, so that the large-diameter pile detection requirement is met, and the data accuracy and the engineering efficiency are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of displacement sensors, in particular to a wireless displacement sensor used in pile load tests. Background Art

[0002] Static load tests determine the bearing capacity of pile foundations through the load-displacement curve at the top of the pile. Traditional methods rely on wired displacement sensors or dial indicators fixed to the reference beam to measure displacement. However, existing technologies have significant drawbacks: First, the sensor needs to be connected to the front-end machine by wire, and the equipment layout is limited by the length of the wire, resulting in poor flexibility. Second, the reference beam needs to be erected on the reference pile, and the spacing between the reference pile and the test pile and the weighted platform pier must be strict (≥4D and >2 meters). In large-diameter pile scenarios, the reference beam is bulky and the reference pile is difficult to install, resulting in time-consuming and labor-intensive preliminary preparations. Third, the steel reference beam is susceptible to temperature deformation and environmental vibration interference, requiring additional protective measures, and data accuracy is difficult to guarantee.

[0003] These issues severely restrict detection efficiency and reliability: the complicated installation of the benchmark system leads to a surge in labor costs, the benchmark pile spacing in a limited site is difficult to meet regulatory requirements, and wired transmission and benchmark beam deformation directly introduce measurement errors. To address this, we propose a wireless displacement sensor for pile load testing. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the existing defects and provide a wireless displacement sensor for pile foundation load testing. The high-precision displacement sensor does not require a reference beam, supports wireless transmission and can be quickly installed to adapt to the needs of large-diameter pile detection, improve data accuracy and engineering efficiency, and effectively solve the problems in the background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solutions: a wireless displacement sensor for use in pile load testing, comprising a housing and a level adjustment assembly;

[0006] Housing: The elevation acquisition module, wireless transmission module and mobile power supply are installed inside, and a touch screen is installed on the front side of the housing;

[0007] Level adjustment assembly: includes a fixed column, a connecting ball and a connecting column, the upper end of the fixed column is provided with a groove, the interior of the groove is provided with a connecting ball, the upper end of the surface of the connecting ball is fixed with a connecting column, the upper end of the connecting column is fixed to the lower side of the shell, the lower end of the fixed column is installed with a supporting assembly, the upper end of the supporting assembly is installed with a toggle assembly, the supporting assembly and the toggle assembly cooperate, the circumferential surface of the fixed column is installed with an extrusion assembly and a fastening assembly, the extrusion assembly and the fastening assembly cooperate, and the level of the elevation acquisition module is adjusted by setting the level adjustment assembly in conjunction with the bubble level;

[0008] Wherein: the input end of the touch screen is electrically connected to the output end of the mobile power supply, and the touch screen is bidirectionally electrically connected to the elevation acquisition module and the wireless transmission module respectively.

[0009] Furthermore, the fastening assembly includes a fixing ring, a sliding rod, a fastening disk, a spring and an oblique extrusion block, the circumferential surface of the fixing column is provided with four corresponding sliding holes, the interior of the sliding hole is fixed with a fixing ring, the interior of the fixing ring is slidably connected with a sliding rod, one end of the sliding rod is fixed with a fastening disk, four fastening disks are all fitted with the surface of the connecting ball, the other end of the sliding rod is fixed with an oblique extrusion block, the circumferential surface of the sliding rod is sleeved with a spring, one end of the spring is fixed to the end face of the fixing ring, and the other end of the spring is fixed to the end face of the fastening disk, and the connecting ball is fixed by setting a fastening assembly in conjunction with the extrusion assembly.

[0010] Furthermore, the extrusion assembly includes an adjusting nut and an extrusion ring. The lower end of the circumferential surface of the fixed column is threadedly connected to the adjusting nut, and the upper end of the adjusting nut is fixed with an extrusion ring. The extrusion ring fits into the inclined surfaces of the four oblique extrusion blocks, and the four oblique extrusion blocks are extruded by setting the extrusion assembly.

[0011] Furthermore, the support assembly includes a connecting barrel, a magnetic suction cup base, a gear and a supporting cam. The connecting barrel is fixed to the lower end of the fixed column, and the magnetic suction cup base is fixed to the lower end of the connecting barrel. Two corresponding grooves are provided at the left and right ends of the circumferential surface of the connecting barrel. The inner part of the groove is rotatably connected to a gear, and a supporting cam is fixed on the end face of the gear, which is connected to the iron plate at the detection point by setting the support assembly.

[0012] Furthermore, the toggle assembly includes a connecting bar, a limiting rod, a threaded rod and a rack. A mounting groove is provided on the front side of the upper end of the connecting barrel, and a connecting bar is provided inside the mounting groove. Two corresponding limiting holes are provided on the front side of the connecting bar, and the limiting holes are internally slidably connected to the limiting rods. Both limiting rods are fixed to the rear end of the mounting groove. A threaded hole is provided in the middle of the front side of the connecting bar, and the internal thread of the threaded hole is connected to the threaded rod. The rear end of the threaded rod is rotatably connected to the rear end of the mounting groove. Two corresponding racks are fixed on the rear side of the connecting bar, and the racks are meshed with gears. By setting the toggle assembly, the two gears are driven to rotate, so that the two supporting cams rotate to support the magnet suction cup base.

[0013] Furthermore, a baffle is fixed to the upper side of the shell by bolts, a bubble level is installed in the middle of the upper side of the baffle, and a handle is fixed to the upper side of the baffle, so that the user can carry it conveniently.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] 1. The magnetic chuck base is directly attached to the iron plate at the detection point, breaking away from the installation restrictions of traditional reference beams and reference piles. The linkage design of the support component and the toggle component enables rapid fixation, adapting to large-diameter pile detection scenarios, avoiding measurement errors caused by insufficient reference pile spacing, and solving the problem of bulky and difficult installation of large-diameter pile reference systems.

[0016] 2. The elevation acquisition module integrates a wireless transmission module, which enables real-time elevation calibration and data transmission through the touch screen, eliminating signal interference problems caused by wired connections. The spring-bevel locking structure connecting the ball and the fastening component in the level adjustment component, combined with the bubble level, enables precise level calibration, significantly improving measurement stability and reducing the impact of ambient temperature deformation.

[0017] 3. The gears and support cam mechanism of the support assembly cooperate with the threaded drive design of the toggle assembly to facilitate quick and easy disassembly. The continuous power supply capability of the mobile power supply reduces the wiring requirements and the manpower consumption of traditional wiring methods, which significantly improves the overall engineering efficiency. The fully enclosed structure of the shell and the rigid connection design of the magnetic suction cup base enhance the vibration resistance and adapt to complex site environments. The lightweight design of the detachable baffle and handle improves the portability of the equipment and meets the needs of rapid deployment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the front structure of the present invention;

[0019] Figure 2 It is a front sectional view of the present invention;

[0020] Figure 3 This is a schematic structural diagram of the fastening assembly of the present invention;

[0021] Figure 4 It is a schematic diagram of the support assembly structure of the present invention.

[0022] In the figure: 1 housing, 2 elevation acquisition module, 3 wireless transmission module, 4 mobile power supply, 5 level adjustment assembly, 51 fixing column, 52 connecting ball, 53 connecting column, 6 fastening assembly, 61 fixing ring, 62 sliding rod, 63 fastening disk, 64 spring, 65 oblique extrusion block, 7 extrusion assembly, 71 adjusting nut, 72 extrusion ring, 8 support assembly, 81 connecting barrel, 82 magnetic suction cup base, 83 gear, 84 support cam, 9 toggle assembly, 91 connecting strip, 92 limit rod, 93 threaded rod, 94 rack, 10 touch screen, 11 baffle, 12 bubble level, 13 handle. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] See also Figure 1-4 ,This embodiment provides a technical solution: a wireless displacement sensor for pile load testing, comprising a housing 1 and a level adjustment component 5;

[0025] Housing 1: The elevation acquisition module 2, wireless transmission module 3 and mobile power supply 4 are installed inside, and a touch screen 10 is installed on the front side of the housing 1;

[0026] Horizontal adjustment component 5: includes a fixed column 51, a connecting ball 52 and a connecting column 53. A groove is provided at the upper end of the fixed column 51, and a connecting ball 52 is provided inside the groove. The upper end of the surface of the connecting ball 52 is fixed with a connecting column 53, and the upper end of the connecting column 53 is fixed to the lower side of the shell 1. A support component 8 is installed at the lower end of the fixed column 51, and a toggle component 9 is installed at the upper end of the support component 8. The support component 8 and the toggle component 9 cooperate with each other. An extrusion component 7 and a fastening component 6 are installed on the circumferential surface of the fixed column 51. The extrusion component 7 and the fastening component 6 cooperate with each other. The fastening component 6 includes a fixing ring 61, a slide rod 62, a fastening disk 63, a spring 64 and an oblique extrusion block 65. Four corresponding sliding holes are provided on the circumferential surface of the fixed column 51. The inner surface of the sliding hole The top is fixed with a fixing ring 61, and the interior of the fixing ring 61 is slidably connected to a sliding rod 62. A fastening disk 63 is fixed to one end of the sliding rod 62. The four fastening disks 63 are all in contact with the surface of the connecting ball 52. The other end of the sliding rod 62 is fixed with an oblique extrusion block 65. A spring 64 is sleeved on the circumferential surface of the sliding rod 62. One end of the spring 64 is fixed on the end face of the fixing ring 61, and the other end of the spring 64 is fixed on the end face of the fastening disk 63. The extrusion assembly 7 includes an adjusting nut 71 and an extrusion ring 72. The lower end of the circumferential surface of the fixed column 51 is threadedly connected with an adjusting nut 71. The upper end of the adjusting nut 71 is fixed with an extrusion ring 72. The extrusion ring 72 is in contact with the inclined surfaces of the four oblique extrusion blocks 65. The support assembly 8 includes a connecting barrel 81 and a magnetic suction cup base 82. , gear 83 and supporting cam 84, the lower end of the fixed column 51 is fixed with a connecting barrel 81, the lower end of the connecting barrel 81 is fixed with a magnet suction cup base 82, and two corresponding grooves are provided at the left and right ends of the circumferential surface of the connecting barrel 81, and the gear 83 is rotatably connected inside the groove, and a supporting cam 84 is fixed on the end surface of the gear 83. The toggle assembly 9 includes a connecting bar 91, a limiting rod 92, a threaded rod 93 and a rack 94. A mounting groove is provided on the front side of the upper end of the connecting barrel 81, and a connecting bar 91 is provided inside the mounting groove. Two corresponding limiting holes are provided on the front side of the connecting bar 91, and the limiting rod 92 is slidably connected to the internal of the limiting hole. The two limiting rods 92 are fixed to the rear end inside the mounting groove, and a threaded hole is provided in the middle of the front side of the connecting bar 91. The internal thread of the perforation is connected with a threaded rod 93, and the rear end of the threaded rod 93 is rotatably connected to the rear end of the mounting groove. Two corresponding racks 94 are fixed to the rear side of the connecting bar 91, and the racks 94 are meshed with the gears 83. The two gears 83 are driven to rotate by setting a toggle assembly 9, so that the two supporting cams 84 rotate to prop up the magnet suction cup base 82, and the support assembly 8 is connected to the iron plate of the detection point by setting a support assembly 8, and the four oblique extrusion blocks 65 are extruded by setting an extrusion assembly 7. The connecting ball 52 is fixed by setting a fastening assembly 6 in cooperation with the extrusion assembly 7, and the level of the elevation acquisition module 2 is adjusted by setting a level adjustment assembly 5 in cooperation with the bubble level 12. The elevation acquisition module 2 is integrated with a GPS positioning system;

[0027] The input end of the touch screen 10 is electrically connected to the output end of the mobile power supply 4 , and the touch screen 10 is bidirectionally electrically connected to the elevation acquisition module 2 and the wireless transmission module 3 .

[0028] Wherein: a baffle 11 is fixed to the upper side of the housing 1 by bolts, a bubble level 12 is installed in the middle of the upper side of the baffle 11, and a handle 13 is fixed to the upper side of the baffle 11, which is convenient for users to carry.

[0029] The working principle of a wireless displacement sensor for pile foundation load test provided by the present invention is as follows: when the equipment is installed, the magnetic suction cup base 82 at the bottom of the support component 8 is first adsorbed on the surface of the iron plate embedded at the detection point, and then the horizontal state of the equipment is observed through the bubble level 12 on the top of the shell 1 and then the horizontality of the shell 1 is adjusted by turning the connecting ball 52. After adjustment, the adjusting nut 71 is turned upward to push the extrusion ring 72 to move upward along the axial direction of the fixed column 51. The inclined surface of the extrusion ring 72 is used to contact the oblique extrusion block 65 of the fastening component 6, forcing the four slide rods 62 to retract synchronously and lock the connecting ball 52. After locking, the test can be carried out. During the test process, the elevation acquisition module 2 monitors the displacement changes of the pile top in real time, and obtains absolute elevation data in combination with the GPS positioning system inside the elevation acquisition module 2. The acquisition parameters are set through the touch display screen 10 and the wireless transmission module 3 is started to send the encrypted data to the remote receiving terminal; the mobile power supply 4 provides continuous power support for the entire system, avoiding the limitations of traditional wiring on the test site. During disassembly, the threaded rod 93 is rotated to move the two racks 94 and drive the two gears 83 to rotate, so that the two supporting cams 84 rotate to lift the magnet suction cup base 82, and then the disassembly can be carried out quickly.

[0030] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A wireless displacement sensor for pile load testing, characterized by: It comprises a housing (1) and a level adjustment assembly (5); Housing (1): an elevation acquisition module (2), a wireless transmission module (3) and a mobile power supply (4) are installed inside, and a touch screen (10) is installed on the front side of the housing (1); A level adjustment component (5): comprising a fixed column (51), a connecting ball (52) and a connecting column (53); a groove is provided at the upper end of the fixed column (51); a connecting ball (52) is provided inside the groove; a connecting column (53) is fixed to the upper end of the surface of the connecting ball (52); the upper end of the connecting column (53) is fixed to the lower side of the housing (1); a supporting component (8) is installed at the lower end of the fixed column (51); a toggle component (9) is installed at the upper end of the supporting component (8); the supporting component (8) and the toggle component (9) cooperate with each other; an extrusion component (7) and a fastening component (6) are installed on the circumferential surface of the fixed column (51); the extrusion component (7) and the fastening component (6) cooperate with each other; The input end of the touch screen (10) is electrically connected to the output end of the mobile power supply (4), and the touch screen (10) is bidirectionally electrically connected to the elevation acquisition module (2) and the wireless transmission module (3).

2. The wireless displacement sensor for pile load testing according to claim 1, characterized in that: The fastening assembly (6) comprises a fixing ring (61), a slide rod (62), a fastening disk (63), a spring (64) and an oblique extrusion block (65); four corresponding sliding holes are opened on the circumferential surface of the fixing column (51); a fixing ring (61) is fixed inside the sliding hole; a slide rod (62) is slidably connected inside the fixing ring (61); a fastening disk (63) is fixed at one end of the slide rod (62); four fastening disks (63) are all fitted with the surface of the connecting ball (52); an oblique extrusion block (65) is fixed at the other end of the slide rod (62); a spring (64) is sleeved on the circumferential surface of the slide rod (62); one end of the spring (64) is fixed on the end face of the fixing ring (61), and the other end of the spring (64) is fixed on the end face of the fastening disk (63).

3. The wireless displacement sensor for pile load testing according to claim 2, characterized in that: The extrusion assembly (7) comprises an adjusting nut (71) and an extrusion ring (72); the lower end of the circumferential surface of the fixing column (51) is threadedly connected to the adjusting nut (71); the upper end of the adjusting nut (71) is fixed with the extrusion ring (72); the extrusion ring (72) is fitted with the inclined surfaces of the four oblique extrusion blocks (65).

4. The wireless displacement sensor for pile load testing according to claim 1, characterized in that: The support assembly (8) comprises a connecting barrel (81), a magnetic suction cup base (82), a gear (83) and a supporting cam (84); the connecting barrel (81) is fixed to the lower end of the fixing column (51); the magnetic suction cup base (82) is fixed to the lower end of the connecting barrel (81); two corresponding grooves are provided at the left and right ends of the circumferential surface of the connecting barrel (81); the gear (83) is rotatably connected inside the groove; and the supporting cam (84) is fixed to the end surface of the gear (83).

5. The wireless displacement sensor for pile load testing according to claim 4, characterized in that: The toggle assembly (9) comprises a connecting bar (91), a limiting rod (92), a threaded rod (93) and a rack (94); a mounting groove is provided on the front side of the upper end of the connecting barrel (81); a connecting bar (91) is provided inside the mounting groove; two corresponding limiting holes are provided on the front side of the connecting bar (91); the limiting rods (92) are slidably connected to the limiting rods (92) inside the limiting holes; the two limiting rods (92) are fixed to the rear end inside the mounting groove; a threaded hole is provided in the middle of the front side of the connecting bar (91); the threaded rod (93) is threadedly connected to the interior of the threaded hole; the rear end of the threaded rod (93) is rotatably connected to the rear end inside the mounting groove; two corresponding racks (94) are fixed to the rear side of the connecting bar (91); the racks (94) are meshed with the gear (83).

6. The wireless displacement sensor for pile load testing according to claim 1, characterized in that: A baffle (11) is fixed to the upper side of the housing (1) by bolts, a bubble level (12) is installed in the middle of the upper side of the baffle (11), and a handle (13) is fixed to the upper side of the baffle (11).

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