Force sensor calibration system

Abstract

The invention relates to a calibration system, and the system comprises a transverse force loading device which is used for loading a transverse force for a to-be-calibrated force sensor, and comprises a transverse force sensor and a transverse cylindrical part disposed on the transverse force sensor; the fixing device is used for fixing the force sensor to be calibrated; the sleeve is arranged outside the fixing device in a sleeving mode, a first hole is formed in the side wall of the sleeve, the transverse force loading device penetrates through the first hole through the transverse cylindrical part to apply transverse force to the force sensor to be calibrated, and the first hole is configured to enable the angle, relative to the horizontal direction, of the transverse cylindrical part to range from 0 degree to 10 degrees. The direction precision of the transverse loading force is improved, and the calibration precision of the force sensor is improved.

Description

Technical Field

[0001] The present disclosure relates to a force sensor calibration system. Background Art

[0002] As modern medicine evolves, interventional surgery is gradually replacing traditional open surgery. As a crucial component in these procedures, force sensors are gaining increasing attention. Calibration of force sensors is a critical step before they can be put into use. Current calibration systems suffer from low accuracy. Researching and designing a high-precision force sensor calibration system is crucial for achieving accurate and efficient force sensor calibration. Summary of the Invention

[0003] Therefore, an object of the present disclosure is to provide a calibration system that improves the accuracy of force sensor calibration.

[0004] The above objects are achieved by a calibration system according to the following description.

[0005] A calibration system includes: a lateral force loading device, which is used to load lateral force on a force sensor to be calibrated, and includes a lateral force sensor and a lateral columnar member arranged on the lateral force sensor; a fixing device, which is used to fix the force sensor to be calibrated; a sleeve, which is sleeved on the outside of the fixing device and has a first hole provided on its side wall. The lateral force loading device applies lateral force to the force sensor to be calibrated through the lateral columnar member through the first hole, and the first hole is configured so that the angle of the lateral columnar member relative to the horizontal direction is between 0 and 10 degrees.

[0006] In one embodiment, the transverse cylindrical member includes a protruding arc-shaped end face or a pointed end face, forming a strip-shaped contact surface with the sensor to be calibrated.

[0007] In one embodiment, a plurality of first holes are provided on the side wall of the sleeve, and the rotational interval angles between the plurality of first holes are the same.

[0008] In one embodiment, a rotation platform is provided at the bottom of the fixing device.

[0009] In one embodiment, it also includes: an axial force loading device, which is used to load axial force on the force sensor to be calibrated, and includes an axial force sensor and an axial cylindrical member arranged on the axial force sensor; the top wall of the sleeve is provided with a second hole, and the axial force loading device passes through the second hole through the axial cylindrical member to apply axial force to the force sensor to be calibrated, and the second hole is configured to make the angle of the axial cylindrical member relative to the axial direction of the force sensor to be calibrated between 0 and 10°.

[0010] In one embodiment, further comprising: a visual amplification device for amplifying the display of the force sensor to be calibrated.

[0011] In one embodiment, comprising two visual amplification devices with non-linear settings for observing the force sensor to be calibrated from two angles.

[0012] In one embodiment, further comprising a multi-dimensional adjustment frame for adjusting the position of the lateral force loading device to align with the first hole.

[0013] In one embodiment, the side wall thickness of the sleeve is greater than 2mm.

[0014] In one embodiment, a channel is provided on the side wall of the fixing device for the optical fiber of the force sensor to be calibrated to pass through.

[0015] Beneficial effects: The present disclosure improves the directional accuracy of the lateral loading force by providing a sleeve on the outside of the fixing device, a first hole is provided on the side wall of the sleeve, the lateral force loading device passes through the first hole through the lateral cylindrical member to apply a lateral force to the force sensor to be calibrated, the first hole is configured to make the angle of the lateral cylindrical member relative to the horizontal direction between 0 and 10°, thereby improving the directional accuracy of the lateral loading force, and thus improving the calibration accuracy of the force sensor. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings of the embodiments of the present disclosure will be briefly introduced below. Among them, the drawings only serve to show some embodiments of the present disclosure, and not to limit all embodiments of the present disclosure to this. In the drawings: Figure 1 A front view of a fixing device according to an embodiment of the present disclosure is shown; Figure 2 A cross-sectional view of the fixing device shown is shown; Figure 1 Figure 3 A top view of the fixing device shown is shown; Figure 1 A structure schematic diagram of a sleeve according to an embodiment of the present disclosure is shown; Figure 4 A top view of the sleeve shown is shown; Figure 5 Figure 4 A structure schematic diagram of a lateral force loading device according to an embodiment of the present disclosure is shown; Figure 6 A structure schematic diagram of an axial force loading device according to an embodiment of the present disclosure is shown; Figure 7 A structure schematic diagram of an axial force loading device according to an embodiment of the present disclosure is shown; Figure 8 ​​A schematic view of a calibration system according to an embodiment of the present disclosure is shown.

[0017] 1 - fixture 11 - clamping device 12 - passage 2 - sleeve 21 - first hole 22 - second hole 3 - lateral force loading device 31 - lateral force sensor 32 - lateral column 4 - axial force loading device 41 - axial force sensor 42 - axial column 5 - three-dimensional adjustment frame 6 - magnification device DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the technical solutions of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be described clearly and completely below in combination with the drawings of the embodiments of the present disclosure. The same reference signs in the drawings represent the same components. It should be noted that the described embodiments are part of the embodiments of the present disclosure, rather than all the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by those of ordinary skill in the art without any creative effort fall within the scope of protection of the present disclosure.

[0019] Unless otherwise defined, technical terms or scientific terms used herein should be understood as having the same meaning as commonly understood by one of ordinary skill in the art to which the present disclosure belongs. The terms "first", "second" and similar terms used in the description and the claims of the present patent application do not denote any order, quantity or importance, but are used to distinguish different components. Similarly, the terms "one" or "a" or similar terms do not necessarily denote the quantity. The terms "including", "containing" or "having" and similar terms mean that the elements or objects before the term encompass the elements or objects listed after the term and their equivalents, without excluding other elements or objects. The terms "connected" or "communicated" and similar terms are not limited to the physical or mechanical connection or communication shown in the drawings, but can include equivalent connections or communications, whether direct or indirect. The terms "upper", "lower", "left", "right" and the like only represent relative positional relationships, which can change when the absolute position of the described object changes.

[0020] Reference will now be made to the drawings Figures 1 to 8 Detailed description of the embodiments of the calibration system according to the present disclosure.

[0021] The present disclosure provides a calibration system, comprising: a lateral force loading device for loading a lateral force to a force sensor to be calibrated, which comprises a lateral force sensor and a lateral column arranged on the lateral force sensor; a fixing device for fixing the force sensor to be calibrated; a sleeve arranged outside the fixing device, and a first hole is arranged on the side wall of the sleeve, the lateral force loading device applies a lateral force to the force sensor to be calibrated through the lateral column penetrating the first hole, and the first hole is configured to make the angle of the lateral column relative to the horizontal direction between 0 and 10 degrees.

[0022] The sleeve is arranged outside the fixing device, a first hole is arranged on the side wall of the sleeve, the lateral force loading device applies a lateral force to the force sensor to be calibrated through the lateral column penetrating the first hole, and the first hole is configured to make the angle of the lateral column relative to the horizontal direction between 0 and 10 degrees, which can reduce the angle error of the lateral force loading device applying a lateral force to the force sensor to be calibrated, thereby improving the calibration accuracy of the lateral force of the force sensor to be calibrated.

[0023] The cross-sectional shape of the lateral column 32 is not limited, such as square, oval or other irregular shapes. The lateral column 32 comprises a convex arc-shaped end face or a pointed end portion, forming a strip-shaped contact surface with the force sensor to be calibrated, thereby forming a point contact with the force sensor to be calibrated, ensuring the accuracy of the contact point height and improving the calibration accuracy. The cross-sectional shape of the lateral column is preferably non-circular to limit the rotation of the lateral column 32 relative to the first hole 21, so that the lateral column forms a horizontal strip-shaped contact surface.

[0024] The cross-sectional shape of the first hole 21 is not limited, such as square, oval or other irregular shapes. The cross-sectional shape of the first hole 21 is matched with the cross-sectional shape of the lateral column 32, and the first hole penetrates the sleeve 2 at an angle of 0 to 10 degrees relative to the horizontal direction, so that the angle of the lateral column 32 relative to the horizontal direction in the first hole is between 0 and 10 degrees.

[0025] In one embodiment, a plurality of first holes 21 are arranged on the side wall of the sleeve 2, and the rotation interval angles between the plurality of first holes are the same, so that the lateral forces in multiple directions of the force sensor to be calibrated can be calibrated. The bottom of the fixing device 1 can be provided with a rotary displacement table, so that only one lateral force loading device needs to be configured to calibrate the lateral forces in multiple directions. The thickness of the side wall of the sleeve is greater than 2 mm, which can further reduce the angle error of the lateral force and improve the calibration accuracy of the lateral force.

[0026] In one embodiment, the fixing device 1 is a hollow cylinder, the fixing device 1 comprises a clamping device 11 arranged in the fixing device 1, the clamping device 11 is used for clamping the force sensor to be calibrated. The outer diameter of the fixing device 1 is larger than the outer diameter of the force sensor to be calibrated, and there is a gap between the sleeve 2 and the force sensor to be calibrated. The side wall of the fixing device 1 can also be provided with a channel 12 for the optical fiber of the force sensor to be calibrated to pass through.

[0027] In one embodiment, the calibration system further comprises an axial force loading device 4 for loading the force sensor to be calibrated with an axial force, which comprises an axial force sensor 41 and an axial cylinder 42 arranged on the axial force sensor, and the top wall of the sleeve 2 is provided with a second hole 22, the axial force loading device 4 applies an axial force to the force sensor to be calibrated through the axial cylinder 42 penetrating the second hole 22, and the second hole 22 is configured to make the angle of the axial cylinder 42 relative to the axial direction of the force sensor to be calibrated between 0 and 10 degrees.

[0028] The cross-sectional shape of the axial cylinder 42 is not limited, such as square, oval or other irregular shape. The cross-sectional shape of the second hole 22 is not limited, such as square, oval or other irregular shape. The cross-sectional shape of the second hole 22 is matched with the cross-sectional shape of the axial force loading device 4, and the second hole penetrates the sleeve 2 at an angle of 0 to 10 degrees relative to the axial direction of the force sensor to be calibrated, so that the angle of the axial cylinder 42 relative to the axial direction in the second hole is between 0 and 10 degrees.

[0029] In one embodiment, the calibration system further comprises a visual magnification device for magnifying and displaying the force sensor to be calibrated, which can include a magnification device 6 and a display device. The calibration system can further comprise two visual magnification devices arranged non-linearly, and the two visual magnification devices are used to observe the force sensor to be calibrated from two angles, so as to adjust the force sensor to be calibrated to be placed vertically.

[0030] In one embodiment, the calibration system further comprises a three-dimensional adjustment frame 5 for adjusting the position of the lateral force loading device 3 to align the lateral cylinder 32 with the first hole 21. The calibration system can further comprise a multi-dimensional adjustment frame for adjusting the position of the axial force loading device 4 to align the axial cylinder 42 with the second hole 22.

[0031] In addition, the technical features disclosed above are not limited to the combinations disclosed with other features, and other combinations between technical features can be made by those skilled in the art according to the purpose of disclosure, and the purpose of the present disclosure is achieved.

Claims

1. A calibration system, characterized in that: include: A lateral force loading device, which is used to load a lateral force on the force sensor to be calibrated, and comprises a lateral force sensor and a lateral columnar member provided on the lateral force sensor; A fixing device, used for fixing the force sensor to be calibrated; A sleeve is sleeved on the outside of the fixing device, and a first hole is provided on the side wall of the sleeve. The lateral force loading device applies a lateral force to the force sensor to be calibrated through the lateral cylindrical member passing through the first hole. The first hole is configured to make the angle of the lateral cylindrical member relative to the horizontal direction between 0 and 10 degrees.

2. The calibration system according to claim 1, characterized in that: The transverse columnar member includes a protruding arc-shaped end face or a pointed end face, and forms a strip-shaped contact surface with the sensor to be calibrated.

3. The calibration system according to claim 1, characterized in that: A plurality of first holes are provided on the side wall of the sleeve, and the rotation interval angles between the plurality of first holes are the same.

4. The calibration system according to claim 3, characterized in that: A rotational translation platform is provided at the bottom of the fixing device.

5. The calibration system according to claim 1, characterized in that: Also includes: An axial force loading device, which is used to load the axial force on the force sensor to be calibrated, and includes an axial force sensor and an axial cylindrical member provided on the axial force sensor; A second hole is provided on the top wall of the sleeve, and the axial force loading device applies axial force to the force sensor to be calibrated through the axial cylindrical member through the second hole. The second hole is configured so that the angle of the axial cylindrical member relative to the axial direction of the force sensor to be calibrated is between 0 and 10°.

6. The calibration system according to claim 1, characterized in that: Also includes: The visual magnifying device is used to magnify and display the force sensor to be calibrated.

7. The calibration system according to claim 6, characterized in that: It comprises two non-linearly arranged visual amplification devices, and the two visual amplification devices are used to observe the force sensor to be calibrated from two angles.

8. The calibration system according to claim 1, wherein: Also included is a multi-dimensional adjustment mount for adjusting the position of the lateral force loading device to align with the first hole.

9. The calibration system according to claim 1, characterized in that: The side wall thickness of the sleeve is greater than 2 mm.

10. The calibration system according to claim 1, characterized in that: A channel for the optical fiber of the force sensor to be calibrated to pass through is provided on the side wall of the fixing device.

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