Calibration tool for force transducer of biaxial testing machine
By designing a calibration fixture for the force sensor of a biaxial testing machine, and using a jack to provide pressure to detect the axial and radial force values of the biaxial testing machine, the problem of inconvenient sensor calibration is solved, and the convenience and accuracy of internal calibration are achieved.
Patent Information
- Application Number
- CN202520364999.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-04
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2035-03-04
AI Technical Summary
The current biaxial testing machine requires external assistance for sensor calibration, making internal calibration difficult and leading to testing uncertainty and wasted human resources.
Design a calibration fixture for a force sensor of a biaxial testing machine, including a fixture base, a standard sensor and a jack. The jack provides axial or radial pressure to detect the axial and radial force values of the biaxial testing machine, thereby achieving internal calibration.
It enables internal calibration of the biaxial testing machine, facilitating regular inspection and calibration, reducing damage and waste of manpower caused by disassembly, and ensuring the accuracy of force measurement.
Smart Images
Figure CN223827197U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of biaxial testing machines, and in particular relates to a calibration fixture for a force sensor of a biaxial testing machine. Background Technology
[0002] During wheel testing, it is often necessary to apply vertical, lateral, and longitudinal composite loads to the wheel simultaneously using a biaxial testing machine to reproduce the complex stresses that the wheel experiences during driving, such as acceleration torque, turning lateral force, and bump impact, in order to verify the fatigue resistance of structures such as the wheel hub and spokes.
[0003] To ensure the accuracy of the test, the biaxial testing machine needs to be inspected and calibrated regularly. Existing technologies often require external institutions to perform calibration, making it difficult to perform internal calibration and thus detect the force values in both the axial and radial directions of the biaxial testing machine. Utility Model Content
[0004] The purpose of this utility model is to provide a calibration fixture for a force sensor of a biaxial testing machine, which can detect the force values in both the axial and radial directions of the biaxial testing machine, facilitates internal calibration, and is beneficial for the periodic inspection and calibration of the biaxial testing machine.
[0005] To achieve the above objectives, the present invention adopts the following technical solution:
[0006] This utility model provides a calibration fixture for a force sensor on a biaxial testing machine, including a fixture base, a standard sensor, and a jack. The fixture base is used to be installed on the biaxial testing machine and to contact the equipment sensor on the biaxial testing machine. The standard sensor is installed on the fixture base. One end of the jack is in contact with the standard sensor and is used to provide pressure to the standard sensor. The pressure is transmitted to the equipment sensor through the standard sensor and the fixture base.
[0007] The present invention relates to a calibration fixture for a force sensor of a biaxial testing machine. The jack is used to provide axial or radial pressure to a standard sensor and an equipment sensor, and the accuracy of the axial and radial force measurement values of the biaxial testing machine can be detected by comparing the pressure values detected by the two.
[0008] Preferably, the jack is connected to the standard sensor via a screw.
[0009] Preferably, the device sensor is mounted on the biaxial testing machine.
[0010] Preferably, the screw is screwed to the nut, and the other end of the jack is in contact with the nut; the jack is used to be coaxially arranged with the biaxial testing machine to detect the axial force value of the biaxial testing machine.
[0011] Preferably, the bidirectional testing machine is provided with a tail end worktable, and the equipment sensor is installed on the tail end worktable; the tooling base is used to connect to the tail end worktable via the screw.
[0012] Preferably, the bidirectional testing machine is provided with a reserved hole, and the tail end worktable is provided with a protrusion, which is inserted into and connected to the reserved hole.
[0013] Preferably, the inner diameter of the reserved hole is larger than the outer diameter of the screw, and the screw passes through the reserved hole.
[0014] Preferably, the standard sensor is equipped with a level, the biaxial testing machine is equipped with a pre-breakage fixture, the jack is arranged radially with the biaxial testing machine, and the other end of the jack is used to contact the pre-breakage fixture to detect the radial force value of the biaxial testing machine.
[0015] Preferably, the biaxial testing machine is equipped with a radial force platform, and the equipment sensor is mounted on the radial force platform.
[0016] Preferably, the tooling base has a connecting groove, and one end of the jack is disposed in the connecting groove.
[0017] The biaxial testing machine force sensor calibration fixture provided by this utility model has the following beneficial effects:
[0018] The force sensor calibration fixture for biaxial testing machines provided by this utility model solves the uncertainty and damage caused by the need to disassemble the sensor for calibration and inspection of biaxial testing machines, as well as the waste of human resources. It can detect the force values in both the axial and radial directions of the biaxial testing machine, which facilitates internal calibration, regular inspection and calibration of the biaxial testing machine, and online calibration of biaxial force measurement and real-time calibration of the testing machine force measurement. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the working state structure of the force sensor calibration fixture for a biaxial testing machine provided in an embodiment of the present invention, which detects the axial force value of the biaxial testing machine.
[0020] Figure 2 This is a schematic diagram of the working state structure of the force sensor calibration fixture for a biaxial testing machine provided in an embodiment of the present invention, which detects the radial force value of the biaxial testing machine.
[0021] Figure 3 This is a side view of the working state of the biaxial testing machine force sensor calibration fixture for detecting the radial force value of the biaxial testing machine, according to an embodiment of this utility model.
[0022] Figure 4This is a schematic diagram of the fixture base of the force sensor calibration fixture for a biaxial testing machine provided in one embodiment of the present invention.
[0023] Figure 5 This is a side view of the fixture base of the force sensor calibration fixture for a biaxial testing machine provided in one embodiment of this utility model.
[0024] Figure 6 This is a structural diagram of the tail worktable of the force sensor calibration fixture for a biaxial testing machine provided in one embodiment of the present invention.
[0025] Figure 7 This is a side view of the tail end worktable of the force sensor calibration fixture for a biaxial testing machine provided in one embodiment of this utility model.
[0026] Figure reference numerals:
[0027] 101. Fixture base; 102. Standard sensor; 103. Jack; 104. Screw; 105. Mounting hole; 106. First screw hole; 111. Nut; 121. Level; 122. Pre-breakage fixture; 200. Biaxial testing machine; 201. Reserved hole; 211. Tail end worktable; 212. Protrusion; 213. Second screw hole; 221. Radial force table. Detailed Implementation
[0028] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0029] Example
[0030] Please refer to the reference. Figures 1 to 5 This embodiment provides a calibration fixture for a force sensor of a biaxial testing machine, including a fixture base 101, a standard sensor 102, and a jack 103. The fixture base 101 is used to be mounted on the biaxial testing machine 200 and to contact the equipment sensor on the biaxial testing machine 200. The standard sensor 102 is mounted on the fixture base 101. One end of the jack 103 is in contact with the standard sensor 102 and is used to provide pressure to the standard sensor 102. The pressure is transmitted to the equipment sensor through the standard sensor 102 and the fixture base 101.
[0031] The biaxial testing machine force sensor calibration fixture of this embodiment provides pressure to the standard sensor 102 through the jack 103, and transmits the pressure axially or radially through the standard sensor 102 and the fixture base 101 to the equipment sensor. Then, the output data of the standard sensor 102 and the tested equipment sensor are read and compared, so as to determine the accuracy of the axial and radial force measurement of the biaxial testing machine 200. This facilitates internal calibration and makes it convenient for periodic inspection and calibration of the biaxial testing machine 200.
[0032] Among them, jack 103 can be a hydraulic jack.
[0033] Specifically, the jack 103 is connected to the standard sensor 102 via the screw 104.
[0034] The tooling base 101 has a first screw hole 106, and the screw 104 is connected to the first screw hole 106. The tooling base 101 can be circular.
[0035] The fixture base 101 can have mounting holes 105, and the standard sensor 102 can be mounted on the fixture base 101 through pins provided in the mounting holes 105. The mounting holes 105 can be screw holes, and the pins can be screws. There can be two mounting holes 105 and two pins, which are symmetrically distributed.
[0036] Specifically, the equipment sensors are installed on the biaxial testing machine 200.
[0037] Specifically, the tooling base 101 has a connecting groove, and one end of the jack 103 is set in the connecting groove.
[0038] The connecting groove can be set as a spherical groove, and one end of the jack 103 can be set as a spherical protrusion.
[0039] Please refer to the reference. Figure 1 , Figures 4 to 7 In one embodiment, the screw 104 is screwed to the nut 111, and the other end of the jack 103 is in contact with the nut 111; the jack 103 is used to be coaxially arranged with the biaxial testing machine 200 to detect the axial force value of the biaxial testing machine 200.
[0040] In this embodiment, the tooling base 101, standard sensor 102, and equipment sensor can be connected in series coaxially by screw 104. Then, axial pressure is applied to the equipment sensor by jack 103. The output data of standard sensor 102 and the tested equipment sensor are read and compared to determine the accuracy of the axial force measurement of the biaxial testing machine 200.
[0041] Specifically, the bidirectional testing machine is equipped with a tail end worktable 211, and the equipment sensors are installed on the tail end worktable 211; the tooling base 101 is used to connect to the tail end worktable 211 via a screw 104.
[0042] The tail end worktable 211 can be configured as a rectangular block. A second screw hole 213 can be opened at the center of the tail end worktable 211, and the screw 104 is screwed into the second screw hole 213. The tail end worktable 211 is located at the tail end of the biaxial testing machine 200. The fixture base 101, standard sensor 102, jack 103, and nut 111 are located on the front side of the biaxial testing machine 200, and the fixture base 101 and standard sensor 102 are located behind the jack 103, which is located behind the nut 111.
[0043] Among them, the tail end direction, that is, the rearward direction, refers to Figure 1 and Figure 3 The left-hand direction and the front direction are indicated by... Figure 1 and Figure 3 The direction shown is to the right.
[0044] Specifically, the bidirectional testing machine is equipped with a pre-drilled hole, and the tail end worktable 211 is equipped with a protrusion 212, which is inserted into the pre-drilled hole. The protrusion 212 can be located at the center of one side of the tail end worktable 211. The screw hole of the tail end worktable 211 can be coaxial with the protrusion 212.
[0045] The reserved hole can be set as a round hole, and the protrusion 212 can be set as a cylinder.
[0046] Specifically, the inner diameter of the reserved hole is larger than the outer diameter of the screw 104, and the screw 104 passes through the reserved hole.
[0047] When testing the axial force measurement accuracy of the biaxial testing machine 200, both the fixture base 101 and the tail end worktable 211 are connected to the screw 104, so that the fixture base 101 is mounted on the biaxial testing machine 200 and in contact with the equipment sensor on the biaxial testing machine 200; the jack 103 is coaxially arranged with the biaxial testing machine 200, and one end of the jack 103 provides pressure to the standard sensor 102; specifically, the following steps may be included:
[0048] First, connect the standard sensor 102 to the tooling base 101;
[0049] Screw 104 is screwed into the reserved screw hole of biaxial testing machine 200, and then the tail end fixing table 211 is installed in the reserved hole;
[0050] Install the standard sensor 102 and jack 103, which have already been fixedly connected, onto the screw 104 and tighten them with nut 111.
[0051] By applying axial pressure through jack 103, both standard sensor 102 and equipment sensor can simultaneously sense the axial pressure.
[0052] Simultaneously record the displayed values of the standard sensor 102 and the device sensor, compare the force measurement results of the two, and determine whether the accuracy of the biaxial testing machine is accurate.
[0053] Please refer to the reference. Figures 2 to 5 In another embodiment, a standard sensor 102 is equipped with a level 121, a biaxial testing machine 200 is provided with a pre-breakage fixture 122, and a jack 103 is arranged radially with the biaxial testing machine 200, with the other end of the jack 103 used to contact the pre-breakage fixture 122 to detect the radial force value of the biaxial testing machine 200.
[0054] In this embodiment, by applying radial pressure to the equipment sensor through the jack 103, and then reading and comparing the output data of the standard sensor 102 and the tested equipment sensor, the accuracy of the radial force measurement of the biaxial testing machine 200 can be determined.
[0055] Specifically, the biaxial testing machine 200 is equipped with a radial force table 221, and the equipment sensors are installed on the radial force table 221.
[0056] The radial force-bearing platform 221 is located at the top, i.e., the front end, of the biaxial testing machine 200. The tooling base 101 here can be set as a rectangle or a horizontally placed right-angled bent S-shape, one end of which can contact the radial force-bearing platform 221.
[0057] When testing the radial force measurement accuracy of the biaxial testing machine 200, the jack 103 is arranged radially with the biaxial testing machine 200, and its other end is in contact with the pre-breakage fixture 122; specifically, it may include the following steps:
[0058] Screw 104 is screwed into the reserved screw hole of biaxial testing machine 200, and then radial force table 221 is coaxially installed on biaxial testing machine 200; the radial force table 221 can be connected to biaxial testing machine 200 by screws.
[0059] Pre-breakage fixture 122 for installing biaxial testing machine 200;
[0060] The standard sensor 102, jack 103 and radial force table 221 can be connected by bolts in the measuring plane where the radial force direction is located.
[0061] The biaxial testing machine 200 can be manually moved toward the pre-breakage fixture 122 so that the jack 103 comes into contact with the pre-breakage fixture 122, and the level of the standard sensor 102 and the jack 103 can be adjusted using the level 121.
[0062] The above embodiments are merely illustrative examples and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.
[0063] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.
[0064] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to has a specific orientation, or is constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0065] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
Claims
1. A calibration fixture for a force sensor of a biaxial testing machine, characterized in that, include: A tooling base for mounting on a biaxial testing machine and contacting the equipment sensors on the biaxial testing machine; A standard sensor is mounted on the tooling base; The jack, one end of which is in contact with the standard sensor, is used to provide pressure to the standard sensor, and the pressure is transmitted to the device sensor through the standard sensor and the tooling base.
2. The biaxial testing machine force sensor calibration fixture according to claim 1, characterized in that, The jack is connected to the standard sensor via a screw.
3. The biaxial testing machine force sensor calibration fixture according to claim 2, characterized in that, The device sensor is mounted on the biaxial testing machine.
4. The biaxial testing machine force sensor calibration fixture according to claim 3, characterized in that, The screw is screwed to the nut, and the other end of the jack is in contact with the nut; the jack is used to be arranged coaxially with the biaxial testing machine to detect the axial force value of the biaxial testing machine.
5. The biaxial testing machine force sensor calibration fixture according to claim 4, characterized in that, The biaxial testing machine is equipped with a tail end worktable, and the equipment sensor is mounted on the tail end worktable; the tooling base is used to connect to the tail end worktable via the screw.
6. The biaxial testing machine force sensor calibration fixture according to claim 5, characterized in that, The biaxial testing machine is provided with a reserved hole, and the tail end worktable is provided with a protrusion, which is inserted into and connected to the reserved hole.
7. The biaxial testing machine force sensor calibration fixture according to claim 6, characterized in that, The inner diameter of the reserved hole is larger than the outer diameter of the screw, and the screw passes through the reserved hole.
8. The biaxial testing machine force sensor calibration fixture according to claim 3, characterized in that, The standard sensor is equipped with a level, the biaxial testing machine is equipped with a pre-breakage fixture, and the jack is arranged radially with the biaxial testing machine, with the other end of the jack contacting the pre-breakage fixture to detect the radial force value of the biaxial testing machine.
9. The biaxial testing machine force sensor calibration fixture according to claim 8, characterized in that, The biaxial testing machine is equipped with a radial force platform, and the equipment sensor is mounted on the radial force platform.
10. The biaxial testing machine force sensor calibration fixture according to any one of claims 1-9, characterized in that, The tooling base has a connecting groove, and one end of the jack is set in the connecting groove.