Tension sensor calibration device

Abstract

The invention relates to a tension sensor calibration device which comprises a supporting mechanism bottom plate connected with a supporting mechanism upper pressing plate through a supporting mechanism supporting column, and further comprises a force transmission mechanism upper pressing plate located on the upper side of the supporting mechanism upper pressing plate and a force transmission mechanism lower pressing plate located between the supporting mechanism bottom plate and the supporting mechanism upper pressing plate. The force transmission mechanism upper pressing plate is connected with the force transmission mechanism lower pressing plate through a force transmission mechanism force transmission column, the force transmission mechanism force transmission column is located on the periphery of the supporting mechanism upper pressing plate, and the force transmission mechanism lower pressing plate is provided with a lower side thrust structure used for applying downward thrust to the lower end of the calibrated tension sensor. An upper side thrust structure used for being pushed downwards by the upper end of the tension sensor is arranged on the upper pressing plate of the supporting mechanism. The tension sensor calibration device provided by the invention can assist the press machine in calibrating the tension sensor.

Description

Technical Field

[0001] The present invention relates to the technical field of verification and calibration, and particularly relates to a calibration device for a tensile force sensor. Background Art

[0002] With the digital, networked, and intelligent transformation and upgrading of the industrial and industrial sectors, the measurement and control of force are developing towards large-scale. In many cases, it is necessary to measure forces of several meganewtons or even more than ten meganewtons. Large-force sensors are not only applied in traditional fields such as airports, bridges, tunnels, mines, large-scale water conservancy projects, and highways. In these traditional fields, the measurement of large forces is mostly compressive force. With the rapid development of many high-precision and high-end fields such as aerospace, shipbuilding, heavy manufacturing equipment, and precision assembly, the metrological detection demand for large-force tensile forces, that is, tensile force sensors, is growing rapidly.

[0003] In recent years, in the aerospace field, with the rapid development of the aviation industry, the aircraft structure, materials, and processing technology have become increasingly complex. The test requirements, scale, and load complexity of newly developed models are getting higher and higher. Structural forms such as arresting hooks and ejection devices have emerged. These structures have a common feature, that is, the test load is large and it is a tensile load. How to accurately measure such single-point large tensile loads and achieve the true assessment of the structural load has become a difficult point in aircraft structure tests.

[0004] For the shipbuilding industry, large-force tensile force sensors are mainly used to detect the thrust of large ships, and then improve the ship power design and control the quality of ship components according to the detection data. Therefore, the metrology of large-force tensile forces is of great significance to the development of the shipbuilding industry. Due to the common problems of large self-weight (about 1 ton), large size (more than 1 meter in length), and mismatched detection space of large-force tensile force sensors, it is difficult to measure and detect tensile forces, and the supply of metrological detection services for large-force tensile forces has become the key bottleneck restricting the quality improvement of the shipbuilding industry.

[0005] For large-force pressure sensors, the metrological calibration process is relatively simple. For example, the pressure sensor can be directly pressurized by a press, while the press cannot directly apply a pull to the tensile force sensor, which makes the calibration of the tensile force sensor a difficult problem in the field of sensor metrological calibration. Summary of the Invention

[0006] The purpose of the present invention is to provide a calibration device for a tensile force sensor that can assist a press in calibrating the tensile force sensor.

[0007] To solve the above technical problems, the technical solution of a calibration device for a tensile force sensor in the present invention is as follows: A calibration device for a tensile force sensor, comprising a bottom plate of a support mechanism. A upper pressure plate of the support mechanism is connected to the bottom plate of the support mechanism through support mechanism columns. It further includes an upper pressure plate of a force transmission mechanism located above the upper pressure plate of the support mechanism and a lower pressure plate of the force transmission mechanism located between the bottom plate of the support mechanism and the upper pressure plate of the support mechanism. The support mechanism columns are located outside the lower pressure plate of the force transmission mechanism. The upper pressure plate of the force transmission mechanism is connected to the lower pressure plate of the force transmission mechanism through force transmission columns of the force transmission mechanism. The force transmission columns of the force transmission mechanism are located outside the upper pressure plate of the support mechanism. A lower side thrust structure for applying a downward thrust to the lower end of the calibrated tensile force sensor is provided on the lower pressure plate of the force transmission mechanism. An upper side thrust structure for downward pushing by the upper end of the tensile force sensor is provided on the upper pressure plate of the support mechanism.

[0008] Further, the upper side thrust mechanism includes an upper side ball seat and an upper side ball head. The upper side ball seat has an upper side ball groove with an upward concave notch for rotational cooperation with the upper side ball head. The upper side ball head has an upper side threaded hole for threaded connection with the upper end of the calibrated tensile force sensor. The upper side ball seat is fixedly provided on the upper pressure plate of the support mechanism.

[0009] Further, the lower side thrust mechanism includes a lower side ball seat and a lower side ball head. The lower side ball seat has a lower side ball groove with a downward concave notch for rotational cooperation with the lower side ball head. The lower side ball head has a lower side threaded hole for threaded connection with the lower end of the calibrated tensile force sensor. The lower side ball seat is fixedly provided on the lower pressure plate of the force transmission mechanism.

[0010] Further, both the upper pressure plate of the support mechanism and the lower pressure plate of the force transmission mechanism are triangular structures. Each corner of the upper pressure plate of the support mechanism is an upper pressure plate mounting corner extending outside the corresponding side of the lower pressure plate of the force transmission mechanism. Each corner of the lower pressure plate of the force transmission mechanism is a lower pressure plate mounting corner extending outside the corresponding side of the upper pressure plate of the support mechanism. There are three force transmission columns of the force transmission mechanism, and each force transmission column of the force transmission mechanism is respectively connected to the corresponding lower pressure plate mounting corner; there are three support mechanism columns, and each support mechanism column is respectively connected to the corresponding upper pressure plate mounting corner.

[0011] Further, the calibration device for the tensile force sensor further includes three adjustment cylinders arranged at intervals in the circumferential direction. The adjustment cylinders are located between the lower pressure plate of the force transmission mechanism and the lower pressure plate of the support mechanism. The upper ends of each adjustment cylinder are respectively used to push the bottom of the corresponding lower pressure plate mounting corner.

[0012] Further, the upper end of the force transmission column of the force transmission mechanism is provided with an upward protruding positioning head. The bottom of the upper pressure plate of the force transmission mechanism is provided with positioning holes that are adaptively inserted and connected with the positioning heads at the upper ends of the force transmission columns of the force transmission mechanism in the up and down direction.

[0013] The beneficial effects of the present invention are as follows: When the tension sensor calibration device in the present invention is in use, the upper end of the tension sensor to be calibrated is connected to the upper pressing plate of the support mechanism, and the upper end of the tension sensor to be calibrated is supported by the support mechanism. The lower end of the tension sensor to be calibrated is connected to the lower pressing plate of the force transmission mechanism. The pressure of the press acts on the upper pressing plate of the force transmission mechanism, and the pressure is transmitted to the lower pressing plate of the force transmission mechanism through the force transmission column of the force transmission mechanism, thereby realizing the pulling of the tension sensor and realizing the calibration of the tension sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] By reading the following detailed description with reference to the accompanying drawings, the above and other objects, features, and advantages of the exemplary embodiments of the present disclosure will become readily understood. In the drawings, several embodiments of the present disclosure are shown in an exemplary rather than restrictive manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein: Figure 1 is a schematic structural diagram of an embodiment of the tension sensor calibration device in the present invention; Figure 2 is Figure 1 a perspective view of; 1. Upper pressing plate of the force transmission mechanism; 2. Upper pressing plate mounting angle; 3. Positioning hole; 4. Positioning head; 5. Force transmission column of the force transmission mechanism; 6. Threaded rod; 7. Lower pressing plate of the force transmission mechanism; 8. Adjusting cylinder; 9. Lower pressing plate of the support mechanism; 10. Upper spherical head; 11. Upper spherical groove; 12. Upper spherical seat; 13. Tension sensor to be calibrated; 14. Lower spherical groove; 15. Lower spherical head; 16. Support mechanism pillar; 17. Lower pressing plate mounting angle. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] For ease of understanding of the present invention, the present invention will be described in more detail below with reference to the accompanying drawings and specific embodiments. The preferred embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described in this specification. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure content of the present invention more thorough and comprehensive.

[0016] It should be noted that unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not used to limit the present invention.

[0017] An embodiment of a tension sensor in the present invention is as Figures 1-2As shown in the figure, it includes a support mechanism and a force transmission mechanism. The support mechanism includes a support mechanism bottom plate and a support mechanism upper pressing plate located on the upper side of the support mechanism bottom plate. The support mechanism upper pressing plate is connected to the support mechanism bottom plate by three support mechanism columns arranged at intervals in the circumferential direction. The force transmission mechanism includes a force transmission mechanism upper pressing plate located on the upper side of the support mechanism upper pressing plate and a force transmission mechanism lower pressing plate located between the support mechanism bottom plate and the support mechanism upper pressing plate. The support mechanism columns are located on the periphery of the force transmission mechanism lower pressing plate. The force transmission mechanism upper pressing plate is connected to the force transmission mechanism lower pressing plate through force transmission mechanism force transmission columns. The force transmission mechanism force transmission columns are located on the periphery of the support mechanism upper pressing plate. A lower side thrust structure for applying a downward thrust to the lower end of the calibrated tension sensor is provided on the force transmission mechanism lower pressing plate. An upper side thrust structure for being pushed downward by the upper end of the tension sensor is provided on the support mechanism upper pressing plate.

[0018] In this embodiment, the upper side thrust mechanism includes an upper side ball seat and an upper side ball head. The upper side ball seat has an upper side ball groove with a concave opening facing upward and rotatably cooperating with the upper side ball head. The upper side ball head has an upper side threaded hole for threadedly connecting with the upper end of the calibrated tension sensor. The upper side ball seat is fixedly arranged on the support mechanism upper pressing plate.

[0019] The lower side thrust mechanism includes a lower side ball seat and a lower side ball head. The lower side ball seat has a lower side ball groove with a concave opening facing downward and rotatably cooperating with the lower side ball head. The lower side ball head has a lower side threaded hole for threadedly connecting with the lower end of the calibrated tension sensor. The lower side ball seat is fixedly arranged on the force transmission mechanism lower pressing plate. During use, the upper end of the calibrated tension sensor is threadedly connected to the upper side ball head, and the lower end of the calibrated tension sensor is threadedly connected to the lower side ball head. The calibrated tension sensor penetrates through the upper side ball seat and the lower side ball seat in the up and down direction.

[0020] In this embodiment, both the support mechanism upper pressing plate and the force transmission mechanism lower pressing plate are triangular structures. Each corner of the support mechanism upper pressing plate is an upper pressing plate mounting corner extending outside the corresponding side of the force transmission mechanism lower pressing plate. Each corner of the force transmission mechanism lower pressing plate is a lower pressing plate mounting corner extending outside the corresponding side of the support mechanism upper pressing plate. There are three force transmission mechanism force transmission columns, and each force transmission mechanism force transmission column is respectively connected to the corresponding lower pressing plate mounting corner; there are three support mechanism columns, and each support mechanism column is respectively connected to the corresponding upper pressing plate mounting corner.

[0021] The tension sensor calibration device further includes three adjustment cylinders arranged at intervals in the circumferential direction. The adjustment cylinders are located between the force transmission mechanism lower pressing plate and the support mechanism lower pressing plate. The upper ends of each adjustment cylinder are respectively used to push against the bottom of the corresponding lower pressing plate mounting corner. The upper end of the piston rod of the adjustment cylinder has no connection relationship with the bottom of the force transmission mechanism lower pressing plate, that is to say, the upper end of the piston rod of the adjustment cylinder can be separated from the mechanism lower pressing plate. The three adjustment cylinders can be independently controlled and operated to adjust the height and angle of the support mechanism according to the working conditions so as to install the calibrated tension sensor.

[0022] The lower end of the force transmission column of the force transmission mechanism is provided with a threaded rod for detachably connecting with the lower pressing plate of the force transmission mechanism. The upper end of the force transmission column of the force transmission mechanism is provided with an upward protruding positioning head, and the bottom of the upper pressing plate of the force transmission mechanism is provided with positioning holes that are adaptively inserted with the positioning heads at the upper ends of the force transmission columns of the force transmission mechanism in the vertical direction.

[0023] The calibration method using this tension sensor calibration device is as follows: In the first step, install the tension sensor to be calibrated on the tension sensor calibration device. Specifically, 1), move the upper pressing plate of the force transmission mechanism away from the force transmission column of the force transmission mechanism. This process can use corresponding lifting equipment to move the upper pressing plate of the force transmission mechanism away; 2), the adjustment cylinder drives the lower pressing plate of the force transmission mechanism to move upward with the lower spherical seat, and the lower spherical seat is separated from the lower spherical head; 3), rotate the lower spherical head, thread-connect the lower end of the tension sensor to be calibrated with the lower spherical head, rotate the upper spherical head, and thread-connect the upper spherical head with the upper end of the tension sensor to be calibrated. The tension sensor to be calibrated carries the lower spherical head upward, causing the lower spherical head and the lower end of the tension sensor under load to be separated from the lower pressing plate of the support mechanism; 4), the piston rod of the adjustment cylinder retracts, the lower pressing plate of the force transmission mechanism drives the lower spherical seat to move downward, the lower spherical seat contacts the lower spherical head, and the piston rod of the adjustment cylinder is separated from the lower pressing plate of the force transmission mechanism. The lower spherical head and the upper spherical head are equivalent to nuts. When the upper spherical head is connected to the tension sensor to be calibrated, the lower spherical head is at a lower position and has a lighter weight, making its rotation process easier and more convenient. Similarly, the rotation of the upper spherical head is also simple and convenient. By continuously rotating the upper spherical head, the lower spherical head, the tension sensor to be calibrated can also be separated from the lower pressing plate of the support mechanism, facilitating the subsequent pulling operation on the tension sensor to be calibrated.

[0024] In the second step, place the upper pressing plate of the force transmission mechanism on the upper ends of the force transmission columns of the force transmission mechanism, and the press applies pressure to the upper pressing plate of the force transmission mechanism to calibrate the tension sensor to be calibrated.

[0025] This tension sensor calibration device is combined with a 20MN press to form a 20MN tension detection mechanism, realizing the calibration of the tension sensor, meeting the increasing need for calibrating ultra-large force value tension sensors, and having significant innovation and advancement, filling the blank of calibrating ultra-large force value tension sensors in our institute.

[0026] A calibration method using the above-mentioned tension sensor calibration device is as follows: In the first step, install the tension sensor to be calibrated on the tension sensor calibration device. Specifically, 1), move the upper pressure plate of the force transmission mechanism away from the force transmission column of the force transmission mechanism; 2), the adjustment cylinder drives the lower pressure plate of the force transmission mechanism to move upward with the lower spherical seat, and the lower spherical seat disengages from the lower spherical head; 3), thread-connect the lower end of the tension sensor to be calibrated to the lower spherical head, and thread-connect the upper spherical head to the upper end of the tension sensor to be calibrated. The tension sensor to be calibrated moves upward with the lower spherical head and disengages from the lower pressure plate of the support mechanism; 4), retract the piston rod of the adjustment cylinder, the lower pressure plate of the force transmission mechanism drives the lower spherical seat to move downward, the lower spherical seat contacts the lower spherical head, and the piston rod of the adjustment cylinder disengages from the lower pressure plate of the force transmission mechanism. In the second step, place the upper pressure plate of the force transmission mechanism on the upper ends of the force transmission columns of each force transmission mechanism, and the press applies pressure to the upper pressure plate of the force transmission mechanism to calibrate the tension sensor to be calibrated.

[0027] In other embodiments of the present invention, the connection between the force transmission column of the force transmission mechanism and the lower pressure plate of the force transmission mechanism can also occur after the upper spherical head is connected to the tension sensor to be calibrated. In this way, during the connection process between the upper spherical head and the tension sensor to be calibrated, without the interference of the force transmission column of the force transmission mechanism, it will be more convenient and fast.

[0028] In the above description of this specification, unless otherwise clearly specified and limited, terms such as "fixed", "installed", "connected" or "connected" should be understood in a broad sense. For example, in terms of the term "connected", it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the communication inside two elements or the interaction relationship between two elements. Therefore, unless otherwise clearly limited in this specification, those skilled in the art can understand the specific meaning of the above terms in the present invention according to specific circumstances.

[0029] According to the above description of this specification, those skilled in the art can also understand the following terms used, such as "upper", "lower", "front", "rear", "left", "right", "length", "width", "thickness", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", "center", "longitudinal", "transverse", "clockwise" or "counterclockwise", etc. Terms indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings of this specification. It is only for the purpose of facilitating the description of the solution of the present invention and simplifying the description, rather than explicitly or implicitly indicating that the device or element involved must have the specific orientation, be constructed and operate in the specific orientation. Therefore, the above terms of orientation or position relationship cannot be understood or interpreted as a limitation to the solution of the present invention.

[0030] In addition, the terms "first", "second", etc. used in this specification to refer to numbered or ordinal terms are for descriptive purposes only and should not be construed as explicitly or implicitly indicating relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this specification, "a plurality of" means at least two, such as two, three or more, etc., unless otherwise specifically defined.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A tension sensor calibration device, characterized in that: It includes a support mechanism bottom plate, on which an upper pressure plate of the support mechanism is connected through support mechanism pillars, and also includes an upper pressure plate of the force transmission mechanism located on the upper side of the upper pressure plate of the support mechanism and a lower pressure plate of the force transmission mechanism located between the bottom plate of the support mechanism and the upper pressure plate of the support mechanism, the support mechanism pillars are located at the periphery of the lower pressure plate of the force transmission mechanism, the upper pressure plate of the force transmission mechanism is connected to the lower pressure plate of the force transmission mechanism through a force transmission column of the force transmission mechanism, the force transmission column of the force transmission mechanism is located at the periphery of the upper pressure plate of the support mechanism, the lower pressure plate of the force transmission mechanism is provided with a lower thrust structure for applying a downward thrust to the lower end of a calibrated tension sensor, and the upper pressure plate of the support mechanism is provided with an upper thrust structure for pushing downward by the upper end of the tension sensor.

2. The tension sensor calibration device according to claim 1, characterized in that: The upper thrust mechanism includes an upper ball seat and an upper ball head. The upper ball seat has an upper ball groove with an upward notch for rotationally cooperating with the upper ball head. The upper ball head has an upper threaded hole for threaded connection with the upper end of the calibrated tension sensor. The upper ball seat is fixedly arranged on the upper pressure plate of the support mechanism.

3. The tension sensor calibration device according to claim 1, characterized in that: The lower thrust mechanism includes a lower ball seat and a lower ball head. The lower ball seat has a lower ball groove with a downward notch for rotationally cooperating with the lower ball head. The lower ball head has a lower threaded hole for threaded connection with the lower end of the calibrated tension sensor. The lower ball seat is fixedly arranged on the lower pressure plate of the force transmission mechanism.

4. The tension sensor calibration device according to claim 1, characterized in that: The upper pressure plate of the support mechanism and the lower pressure plate of the force transmission mechanism are both triangular structures. Each corner of the upper pressure plate of the support mechanism is an upper pressure plate mounting angle extending outward from the corresponding side edge of the lower pressure plate of the force transmission mechanism, and each corner of the lower pressure plate of the force transmission mechanism is a lower pressure plate mounting angle extending outward from the corresponding side edge of the upper pressure plate of the support mechanism. The force transmission mechanism has three force transmission columns, and each force transmission column of the force transmission mechanism is respectively connected to the corresponding lower pressure plate mounting angle; the support mechanism has three pillars, and each support mechanism pillar is respectively connected to the corresponding upper pressure plate mounting angle.

5. The tension sensor calibration device according to claim 4, characterized in that: The tension sensor calibration device also includes three adjustment cylinders arranged at intervals along the circumferential direction. The adjustment cylinders are located between the lower pressure plate of the force transmission mechanism and the lower pressure plate of the support mechanism. The upper end of each adjustment cylinder is used to push the bottom of the corresponding lower pressure plate installation angle.

6. The tension sensor calibration device according to any one of claims 1 to 4, characterized in that: The upper end of the force transmission column of the force transmission mechanism is provided with a positioning head protruding upward, and the bottom of the upper pressure plate of the force transmission mechanism is provided with a positioning hole adapted to be plugged with the positioning head at the upper end of the force transmission column of each force transmission mechanism in the upper and lower directions.

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