Calibration tool for vane
By using a crossbeam calibration fixture to calibrate the crossbeam with a frame and pressure sensing device, the problem of lack of calibration for large integrated crossbeams in marine engineering is solved, achieving high-precision data measurement and consistency, and applicable to crossbeams of various specifications.
Patent Information
- Application Number
- CN202520144415.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-21
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2035-01-21
AI Technical Summary
Existing technologies lack effective calibration methods, especially for large integrated vanes applicable to offshore engineering operations, which cannot guarantee the accuracy and reliability of vane shear test data.
A crossbeam calibration fixture is provided, including a frame, a detection plate, and a pressure sensing device. The crossbeam is calibrated by applying torque using standard weights to form a mechanical response curve, ensuring that the sensor produces consistent electrical parameters during field operations.
It achieves high-precision vane calibration, ensuring the reliability and consistency of vane shear test data. It is applicable to vanes of different specifications and features a novel structural design with high integration.
Smart Images
Figure CN223910689U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to geological survey technical field especially relates to a cross board calibration tool. BACKGROUND
[0002] Vane Shear Test (VST) is a test method specially used for determining the shear strength of soft clay. When testing, the vane head is pressed into the soil layer or soil, and rotated at a constant speed, thereby forming a cylindrical failure surface in the soil layer. Through the measurement system, the resistance moment of the soil can be determined, and the shear strength of the soil can be calculated accordingly. As the core equipment of shear test, the vane shear tester can be divided into field type and indoor type according to different use environments. In engineering practice, the shear strength and sensitivity of soft clay are usually analyzed by combining the test results of the two types, and then the bearing capacity of foundation soil or single pile is evaluated, or used for calculating the slope stability, and judging the stress history of soft clay. The vane used in Vane Shear Test is equipped with a torque sensor inside, which can directly obtain the shear data of the stratum.
[0003] However, there is still a lack of effective calibration method for the calibration of vane, especially for large integrated vane suitable for offshore engineering operation, which lacks reliable calibration means. CONTENT OF THE UTILITY MODEL
[0004] In order to overcome the problems existing in the prior art, the utility model aims at providing a cross board calibration tool, which can calibrate cross boards of different specifications and sizes, and has better data reference and high measurement accuracy.
[0005] The utility model provides a cross board calibration tool, which comprises:
[0006] A frame body is used for fixing the cross board.
[0007] A detection disc has a cross slot matched with the cross board, and the detection disc is rotatably connected with the frame body.
[0008] A pressure sensing device is located on both sides of the frame body, and comprises a first support, a second support, a pressure sensor and a weight tray. The pressure sensor is arranged on the first support, the first support is arranged on the frame body, the second support is rotatably connected with the first support through a rotating shaft, the detection end of the pressure sensor is opposite to one side surface of the second support, and the weight tray is connected with a cable.
[0009] In some embodiments, the frame body comprises a frame, the bottom of the frame is provided with a support table, the support table is provided with a bearing, the detection disc is embedded on the bearing, the middle of the frame is provided with a clamp coaxial with the bearing, and the clamp is used for clamping the cross plate.
[0010] In some embodiments, the lower part of the clamp is further provided with a support seat coaxial with the bearing, and the support seat has a groove for clamping the cross plate.
[0011] In some embodiments, the support seat is detachably connected with the frame.
[0012] In some embodiments, the detection disc comprises a disc body and a disc shaft, the center of the disc body is provided with a groove, the inner circumferential wall of the groove is provided with a radial extending limiting groove, the circumferential direction of the disc shaft is provided with a protrusion for clamping the limiting groove, the disc shaft is contained in the groove, the disc shaft is provided with the cross slot, the disc shaft is provided with an annular flange, and the annular flange is embedded in the inner ring of the bearing.
[0013] In some embodiments, the first support comprises a mounting seat and a first hinge, the mounting seat is arranged on the frame body, the side of the mounting seat away from the frame body extends outwardly and horizontally to form a mounting plate, the first hinge is arranged on the mounting plate, the pressure sensor is arranged on the side of the mounting seat away from the frame body and below the support plate, and the second support is rotationally connected with the first hinge.
[0014] In some embodiments, the second support comprises a second hinge, a pulley support and a pulley, the second hinge is rotationally connected with the first hinge through a rotating shaft, the second hinge is opposite to the detection end of the pressure sensor, the pulley support is arranged on the end face of the second hinge away from the pressure sensor, the pulley is mounted on the pulley support, and the cable is wound around the pulley.
[0015] In some embodiments, both sides of the frame body are provided with two pressure sensing devices.
[0016] In some embodiments, a display device arranged on the frame body is further included, the display device is connected with the pressure sensing device, and the display device is used for displaying the hanging weight of the weight tray.
[0017] In some embodiments, the bottom of the frame body is provided with a castor.
[0018] The technical scheme provided by the utility model can have the following beneficial effects:
[0019] When the technical scheme of the utility model is applied, the detection end of the cross plate is fixed and installed upwards on the frame body, the detection end of the cross plate is embedded in the cross groove of the detection disc, the same standard weights are placed on the weight trays on both sides of the frame body, the weight of the standard weight is transmitted to the second support through the cable, the second support rotates under stress and contacts and abuts against the pressure sensor, the torque of the standard weight applied to the detection disc can be obtained, a standard mechanical reference value is given to the sensor system inside the micro cross plate, a load gradient can be formed by continuously increasing the standard weights of the same weight, a plurality of calibration points of the micro cross plate are determined, a mechanical response curve is finally connected, the K value of the stress response curve of the sensor inside the micro cross plate can be determined, the micro cross plate calibration tool, the micro cross plate is embedded in the recessed structure of the detection disc, the cross plate shear test is simulated by using the detection disc and the pressure sensing device, the standard weights of different weights are applied, the load is applied to the detection disc through the tangential direction of the cable, the torque is generated, the sensor also generates the same electrical parameters when subjected to the same external force in field operation, the corresponding parameters are collected, and finally it is ensured that the parameters obtained by the micro cross plate in field test are credible.
[0020] The cross plate calibration tool provided by the utility model realizes the calibration operation of the cross plate by using the detection disc and the pressure sensing device, the mechanical response curve of the cross plate can be drawn, the cross plate calibration tool has high-precision calibration characteristics and can adapt to the calibration requirements of cross plates of various specifications, has novel structure design and high integration, and ensures the consistency of detection results. BRIEF DESCRIPTION OF DRAWINGS
[0021] The above and other objects, features and advantages of the present application will become more apparent from the following detailed description of exemplary embodiments of the present application taken in conjunction with the accompanying drawings, in which like reference characters refer to the like parts throughout the figures, and in which:
[0022] Figure 1 is a structural schematic view of the cross plate calibration tool shown in the utility model embodiment;
[0023] Figure 2 is a structural schematic view of the frame body shown in the utility model embodiment;
[0024] Figure 3 is a structural schematic view of the detection disc shown in the utility model embodiment;
[0025] Figure 4 is an exploded schematic view of the detection disc shown in the utility model embodiment;
[0026] Figure 5 is a partial structural schematic view of the pressure sensing device shown in the utility model embodiment;
[0027] Figure 6 is an assembly schematic diagram of the cross plate calibration tool calibrating a cross plate, shown in the embodiments of the present utility model;
[0028] Figure 7 is a top view of the cross plate calibration tool calibrating a cross plate, shown in the embodiments of the present utility model;
[0029] Figure 8 is another assembly schematic diagram of the cross plate calibration tool calibrating a cross plate, shown in the embodiments of the present utility model;
[0030] Figure 9 is another top view of the cross plate calibration tool calibrating a cross plate, shown in the embodiments of the present utility model.
[0031] Reference signs:
[0032] 1, frame body; 11, frame; 12, support table; 13, clamp; 14, support seat;
[0033] 2, detection disc; 20, cross groove; 21, disc body; 21a, groove; 21b, limiting groove; 22, disc shaft; 22a, protrusion; 22b, annular flange;
[0034] 3, pressure sensing device; 31, first support; 311, mounting seat; 312, first hinge; 313, mounting plate; 32, second support; 321, second hinge; 322, pulley support; 323, pulley; 33, pressure sensor; 34, weight tray; 35, cable;
[0035] 4, display device;
[0036] 5, castor;
[0037] 6, cross plate. DETAILED DESCRIPTION
[0038] The preferred embodiments of the present application will be described in more detail by making reference to the drawings. Although the preferred embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.
[0039] In the description of the application, it needs to be understood that the terms "one end", "the other end", "outer side", "upper", "inner side", "horizontal", "coaxial", "central", "end", "length", "outer end" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.
[0040] In addition, in the description of the application, "a plurality of" means at least two, for example, two, three, etc., unless otherwise explicitly and specifically limited.
[0041] Calibration is a pre-step before factory as an electrical cross plate 6, the electrical cross plate 6 is a cross plate 6 with built-in torque sensor, calibration can give the sensor system a standard mechanical reference value, and then the correct parameters can be collected during operation. Generally speaking, the cross plate 6 needs to be calibrated before test operation.
[0042] Calibration is a process of giving a standard parameter to the sensor. The reason why the cross plate 6 needs to be calibrated is that it is impossible to control the parameter error in the production process by 100%, so the sensor will have a slight measurement error no matter how. Specifically, when the same force is applied to the same batch of sensors, the electrical parameters such as voltage and current fed back by each sensor are different. The calibration operation of the cross plate 6 can improve the reliability of the cross plate 6 shear test.
[0043] The technical scheme of the embodiment of the application is described in detail below with reference to the drawings.
[0044] As shown in Figures 1 to 6 The utility model discloses an embodiment provides a cross plate 6 calibration tool, including frame body 1 for fixing cross plate 6;
[0045] Detection disc 2 has cross groove 20 with cross plate 6 plug-in cooperation, detection disc 2 is rotatably connected with frame body 1;
[0046] Pressure sensing device 3 is located at both sides of frame body 1, including first support 31, second support 32, pressure sensor 33 and weight tray 34, pressure sensor 33 is arranged on first support 31, first support 31 is arranged on frame body 1, second support 32 is rotatably connected with first support 31 through pivot, the detection end of pressure sensor 33 is opposite to one side of second support 32, weight tray 34 is connected with cable 35, cable 35 is connected with detection disc 2 after passing through second support 32.
[0047] Mounting base 311 is used to mount the detection plate 2 and the pressure sensing device 3. Mounting base 311 can be a plate or frame structure. When the plate is used as the supporting platform for the detection plate 2, pressure sensing device 3, and mounting bracket, the plate can also have through holes to allow the detection plate 2 to pass. To ensure the structural strength and durability of the device and improve its portability, mounting base 311 can be constructed using aluminum profile tubing spliced together to form the frame. Cable 35 can be made of steel cable or fiber rope. When calibrating the miniature crossbeam 6, it is installed face down in the mounting bracket, with the detection end (e.g., the cross-shaped detection head) of the miniature crossbeam 6 fitted into the recessed structure of the detection disk 2. Then, standard weights of the same weight are placed on the weight trays 34 on both sides of the mounting base 311. The weight of the standard weights is transmitted to the second bracket 32 via cable 35. The second bracket 32 rotates under force and comes into contact with the pressure sensor 33, thus obtaining the torque applied to the detection disk 2 by the standard weights. This provides a standard mechanical reference value to the sensor system inside the miniature crossbeam 6. By continuously adding standard weights of the same weight, a load gradient is formed, determining the... Multiple calibration points of the cross plate 6 are eventually connected to form a mechanical response curve, which allows the determination of the K value of the force response curve of the sensor inside the cross plate 6. The cross plate 6 is calibrated using a fixture, with the cross plate 6 fitted into the recessed structure of the detection disk 2. The detection disk 2 and the pressure sensing device 3 are used to simulate the shear test of the cross plate 6. By applying standard weights of different weights, a load is applied to the detection disk 2 in the tangential direction through the cable 35. When the detection disk 2 rotates, it can drive the bottom of the miniature cross plate 6 to rotate, thereby loading and generating torque. This ensures that the sensor will generate the same electrical parameters when subjected to the same external force in field operations, and thus collect the corresponding parameters. Ultimately, this ensures that the parameters obtained by the miniature cross plate 6 in field tests are reliable.
[0048] In a preferred embodiment, the frame 1 includes a frame 11, the bottom of the frame 11 is provided with a support platform 12, the support platform 12 is provided with a bearing, the detection disc 2 is embedded in the bearing, and the middle of the frame 11 is provided with a clamp 13 coaxial with the bearing, the clamp 13 is used to clamp the cross plate 6.
[0049] Based on the above specific embodiments, a support seat 14 coaxial with the bearing is also provided below the clamp 13, and the support seat 14 has a groove for engaging the cross plate 6.
[0050] Furthermore, the support base 14 is detachably connected to the frame 11 to accommodate cross plates 6 of different lengths, ensuring that the cross plate 6 can be clamped and fixed by the clamp 13, that the support base 14 ensures that the cross plate 6 does not slip, and that the support platform 12 simulates the rotation of the cross plate 6.
[0051] In order to ensure that the force of the detection disc 2 and the pressure sensing device 3 can be maintained on the same straight line, two pressure sensing devices 3 are arranged on both sides of the frame body 1, so as to adapt to detection discs 2 of different sizes.
[0052] In a preferred embodiment, the detection disc 2 comprises a disc body 21 and a disc shaft 22, a recess 21a is arranged at the center of the disc body 21, a radial extending limiting groove 21b is arranged on the inner circumferential wall of the recess 21a, a protrusion 22a is arranged on the circumference of the disc shaft 22 and is clamped with the limiting groove 21b, the disc shaft 22 is accommodated in the recess 21a, the disc shaft 22 is provided with the cross slot 20, and the disc shaft 22 is provided with an annular flange 22b which is embedded in the inner ring of the bearing. The shape of the disc body 21 can be selected according to actual needs, for example, circular and elliptical, and in the embodiment, the disc body 21 is provided in a butterfly structure, similar to an 8-shaped structure, and the disc body 21 can also be understood as a disc with a missing part, which functions to apply a load in the tangent direction and further generate a torque. The cross plate 6 calibration tool provided by the utility model applies a standard weight to apply a load, and the diameter of the butterfly disc is known, that is, the torque value generated by the calibrated cross plate 6 in the middle is determined, and a standard external load for calibrating the sensor can be applied. By continuously increasing the same weight of the weight to form a load gradient, a plurality of calibration points are determined, and finally a calibrated mechanical response curve is connected, that is, the K value of the curve of the force response of the sensor is determined, and the calibration is completed.
[0053] In a preferred embodiment, the first support 31 comprises a mounting seat 311 and a first hinge 312, the mounting seat 311 is arranged on the frame body 1, the mounting seat 311 extends outwardly and horizontally on the side away from the frame body 1 to form a mounting plate 313, the first hinge 312 is arranged on the mounting plate 313, the pressure sensor 33 is arranged horizontally on the side of the mounting seat 311 away from the frame body 1, and the pressure sensor 33 is located below the support plate, and the second support 32 is rotationally connected with the first hinge 312.
[0054] Further, the second support 32 comprises a second hinge 321, a pulley support 322 and a pulley 323, the second hinge 321 is rotationally connected with the first hinge 312 through a rotating shaft, the second hinge 321 is opposite to the detection end of the pressure sensor 33, the pulley support 322 is arranged on the end face of the second hinge 321 away from the pressure sensor 33, the pulley 323 is installed on the pulley support 322, and the cable 35 is wound around the pulley 323.
[0055] On both sides of the mounting seat 311, pressure sensing devices 3 are equipped. Pulley 323 is installed on pulley bracket 322. First hinge 312 and second hinge 321 are connected through a rotating shaft to realize rotation connection, and together constitute a hinge structure. The hinge structure drives pulley bracket 322 to rotate around the rotating shaft, and then makes one side of pulley bracket 322 contact and press against pressure sensor 33. In some embodiments, pressure sensor 33 is a columnar pressure sensor, the axis of the detection end of which is perpendicular to the side of pulley bracket 322, ensuring that pressure sensor 33 can be correctly stressed. When pulley bracket 322 is rotated towards pressure sensor 33 under the action of the gravity of the weight, second hinge 321 can convert the force it bears into horizontal force, so that pressure sensor 33 is axially compressed.
[0056] In a preferred embodiment, the cross plate 6 calibration tool further comprises a display device 4 provided on the frame 1, the display device 4 being connected to the pressure sensing device 3, and the display device 4 being used to display the hanging weight of the weight tray 34.
[0057] In addition, the calibration tool can also be provided with a controller, the controller being connected to the pressure sensor 33, the controller internally being provided with a control module, a communication module and a display module, the communication module being able to connect with the terminal and computer of the user, the hanging weight of the pressure sensor 33 being displayed through the display module, or the hanging weight being uploaded to the terminal or computer of the user through the communication module, and the force response curve being generated by the program of the computer.
[0058] Further, in order to improve the portability of the calibration tool, the bottom of the frame 1 is provided with a brake-equipped caster 5, so that the user can move the calibration tool by pushing it and fix it at the working position.
[0059] As Figures 7 to 9As shown, the cross plate calibration tool can accurately calibrate large cross plates 6 and small cross plates 6. The specific operation is as follows: first, place the large cross plate 6 upwards, clamp the middle part of the large cross plate 6 with the clamp 13, support the end of the large cross plate 6 with the support seat 14, and the end of the large cross plate 6 is designed with a slope structure, the inside of the support seat 14 is provided with a conical cavity and a cylindrical cavity, and the end of the large cross plate 6 can be embedded and clamped with the conical cavity. The clamp 13 and the support seat 14 are coaxial with the bearing, which ensures that the large cross plate 6 can maintain a vertical posture on the frame 1. The cross structure of the large cross plate 6 passes out from the middle of the support table 12, and after the installation and fixation of the large cross plate 6 are completed, the disc body 21 is sleeved on the protruding part on the top of the large cross plate 6. The disc body 21 is in the shape of a butterfly, and a cross groove 20 is provided in the center, which can be embedded with the cross structure of the large cross plate 6. The bearing on the support table 12 enables the disc body 21 to be rotationally connected with the disc shaft 22, allowing the disc body 21 to rotate around the axis of the bearing. The disc body is provided with a cable 35 around the outer periphery, and the cable 35 is connected to the weight tray 34 after passing through the pulley. By placing equal weights on the two weight trays 34, the disc body can provide a balanced torque for the cross plate 6. By adjusting the weight, the torque value can be accurately adjusted, thereby completing the calibration work.
[0060] When calibrating the small cross plate 6, since the structure and range of the small cross plate 6 are smaller, the small cross plate 6 needs to be installed on an adaptive structure and hung with a small disc body 21. The overall diameter of the small disc body 21 is smaller, so the same weight can be used to exert a smaller torque on it for more accurate range calibration. Specifically, the calibration and installation of the small cross plate 6 are carried out through its dedicated adaptive module. It is mainly composed of a clamping rod, an adaptive joint and an extension rod. The adaptive joint is installed at the top of the clamping rod to adapt to extension rods of different lengths. The extension rod is connected with the adaptive joint, and finally the small cross plate 6 is installed at the top. After adjusting the installation position of the support seat 14 and fixing the small cross plate 6, the calibration work can be carried out.
[0061] In summary, compared with the prior art, the cross plate calibration tool provided by the utility model has a detachable support seat that can adapt to the fixing needs of cross plates of different specifications. The calibration operation of the cross plate is realized by using a detection disc and a pressure sensing device. The torque of the cross plate is measured by using weights of different weights, and then the mechanical response curve of the cross plate is drawn. The cross plate calibration tool has high-precision calibration characteristics and can adapt to the calibration needs of cross plates of various specifications. The structure design is novel and has high integration, which ensures the consistency of the test results.
[0062] Having described various embodiments of the application, it is to be understood that the above description is meant not to limit and not to encompass all of the possible embodiments. Many modifications and variations of this application can be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. It is intended that the scope of the application be defined by the scope of the patent and equivalents thereof.
Claims
1. A cross-plate calibration fixture, characterized in that, include: The frame (1) is used to fix the cross plate (6); The detection plate (2) has a cross groove (20) that is inserted into the cross plate (6), and the detection plate (2) is rotatably connected to the frame (1); The pressure sensing device (3) is located on both sides of the frame (1) and includes a first support (31), a second support (32), a pressure sensor (33), and a weight tray (34). The pressure sensor (33) is mounted on the first support (31), which is mounted on the frame (1). The second support (32) is rotatably connected to the first support (31) via a rotating shaft. The detection end of the pressure sensor (33) is opposite to one side of the second support (32). The weight tray (34) is connected to a cable (35), which passes around the second support (32) and connects to the detection plate (2).
2. The cross-plate calibration fixture according to claim 1, characterized in that, The frame (1) includes a frame (11), the bottom of the frame (11) is provided with a support platform (12), the support platform (12) is provided with a bearing, the detection disc (2) is embedded in the bearing, and the middle part of the frame (11) is provided with a clamp (13) coaxial with the bearing, the clamp (13) is used to clamp the cross plate (6).
3. The cross-plate calibration fixture according to claim 2, characterized in that, The clamp (13) is also provided with a support seat (14) coaxial with the bearing below it, and the support seat (14) has a groove for engaging the cross plate (6).
4. The cross-plate calibration fixture according to claim 3, characterized in that, The support base (14) is detachably connected to the frame (11).
5. The cross-plate calibration fixture according to claim 2, characterized in that, The detection disc (2) includes a disc body (21) and a disc shaft (22). The disc body (21) has a groove (21a) at its center. The inner circumferential wall of the groove (21a) has a radially extending limiting groove (21b). The disc shaft (22) has a protrusion (22a) in the circumferential direction that engages with the limiting groove (21b). The disc shaft (22) is housed in the groove (21a). The disc shaft (22) has the cross groove (20) and an annular flange (22b) that fits into the inner ring of the bearing.
6. The cross-plate calibration fixture according to claim 1, characterized in that, The first bracket (31) includes a mounting base (311) and a first hinge (312). The mounting base (311) is disposed on the frame (1). The mounting base (311) extends horizontally outward from the side facing away from the frame (1) to form a mounting plate (313). The first hinge (312) is disposed on the mounting plate (313). The pressure sensor (33) is horizontally disposed on the side of the mounting base (311) facing away from the frame (1) and the pressure sensor (33) is located below the support plate. The second bracket (32) is rotatably connected to the first hinge (312).
7. The cross-plate calibration fixture according to claim 6, characterized in that, The second bracket (32) includes a second hinge (321), a pulley bracket (322), and a pulley (323). The second hinge (321) is rotatably connected to the first hinge (312) via a pivot. The second hinge (321) is opposite to the detection end of the pressure sensor (33). The pulley bracket (322) is disposed on the end face of the second hinge (321) away from the pressure sensor (33). The pulley (323) is mounted on the pulley bracket (322). The cable (35) is wound around the pulley (323).
8. The cross-plate calibration fixture according to any one of claims 1 to 7, characterized in that, Two pressure sensing devices (3) are provided on both sides of the frame (1).
9. The cross-plate calibration fixture according to any one of claims 1 to 7, characterized in that, It also includes a display device (4) mounted on the frame (1), the display device (4) being connected to the pressure sensing device (3), and the display device (4) being used to display the load weight of the weight tray (34).
10. The cross-plate calibration fixture according to claim 1, characterized in that, The bottom of the frame (1) is equipped with casters (5).