Novel three-dimensional force sensor

Abstract

The utility model discloses a novel three-dimensional force sensor, which comprises an elastic sensor main body with a cylindrical structure, the upper part of the elastic sensor main body is provided with a first annular groove, the lower part of the elastic sensor main body is provided with a second annular groove, and four mounting positions are arranged in the second annular groove; an axial strain gauge is attached to the first annular groove, and three of the four installation positions are each provided with a transverse strain gauge. Thus, axial pressure information is received through the axial strain gauge in the first annular groove, transverse pressure information is received through the three transverse strain gauges, and the application scene of the sensor is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sensors, in particular to a novel three-dimensional force sensor. Background Art

[0002] A sensor is a device that converts physical, chemical, or biological quantities into electrical signals. The output signal can take various forms, such as voltage, current, frequency, and pulse, meeting the requirements of information transmission, processing, recording, display, and control. It is an indispensable component in automatic detection and control systems. However, due to structural limitations, many sensors can only withstand axial or lateral pressure.

[0003] Based on this, the applicant proposed a new three-dimensional force sensor that integrates XYZ axial pressure information acquisition. Utility Model Content

[0004] The utility model discloses a novel three-dimensional force sensor, which aims to solve the technical problems in the background technology.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A novel three-dimensional force sensor includes a cylindrical elastic sensor body, wherein a first annular groove is provided on the upper portion of the elastic sensor body, a second annular groove is provided on the lower portion, and four mounting positions are provided in the second annular groove; an axial strain gauge is affixed to the first annular groove, and a transverse strain gauge is respectively provided on three of the four mounting positions.

[0007] According to the improvement of the present invention, a first anti-overload groove is extended inwardly from the upper end surface of the first annular groove.

[0008] According to the improvement of the present invention, a second anti-overload groove is provided on both the upper end surface and the lower end of the second annular groove.

[0009] As an improvement to the present invention, an annular fixing seat is provided in the second annular groove, and four fixing holes are equidistantly provided on the side surface of the annular fixing seat.

[0010] The novel three-dimensional force sensor provided by the utility model has the following advantages:

[0011] The sensor comprises a cylindrical elastic sensor body with a first annular groove at the top and a second annular groove at the bottom. The second annular groove has four mounting locations. An axial strain gauge is attached to the first annular groove, and three of the four mounting locations each have a transverse strain gauge. This allows the sensor to receive axial pressure information via the axial strain gauge in the first annular groove, while the three transverse strain gauges receive transverse pressure information, broadening its application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The figure is a schematic diagram of the three-dimensional structure of a novel three-dimensional force sensor in one direction of the utility model.

[0013] Figure 2 This is a schematic diagram of the three-dimensional structure of a novel three-dimensional force sensor of the present utility model in another direction.

[0014] Figure 3 The figure is a schematic diagram of the planar structure of a novel three-dimensional force sensor in one direction of the utility model.

[0015] Figure 4 This is a schematic cross-sectional view of a novel three-dimensional force sensor in one direction.

[0016] Figure 5 This is the circuit layout of the strain gauge in a novel three-dimensional force sensor of the utility model. DETAILED DESCRIPTION

[0017] In the description of this utility model, it should be understood that the terms "center," "upper," "lower," "front," "back," "left," and "right" and the like, indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0018] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model in specific circumstances.

[0019] Reference Figures 1 to 5As shown, the utility model discloses a novel three-dimensional force sensor, including an elastic sensor body 1 of a cylindrical structure, wherein the upper portion of the elastic sensor body 1 is provided with a first annular groove 11, and the lower portion is provided with a second annular groove 12, and the second annular groove 12 is provided with four mounting positions 121; an axial strain gauge 2 is affixed to the first annular groove 11, and three of the four mounting positions 121 are respectively provided with a transverse strain gauge 3; specifically, the elastic sensor body 1 of the sensor is a cylindrical structure with a central hole, a first annular groove 11 is provided on the upper portion, and a longitudinal strain gauge is affixed to the surface thereof, and the longitudinal strain gauge is a T-shaped gauge to detect the voltage value of the axial output; the second annular groove 12 is provided with four mounting positions 121 , wherein the surface of each of the three mounting positions 121 is affixed with a transverse strain gauge 3, and the transverse strain gauge 3 is a feather gauge. When the elastic sensor body 1 is deformed by pressure, the strain grids of the T-shaped gauge and the feather gauge change, stretching or compressing, thereby causing the output voltage value to change (Wheatstone bridge). The T-shaped gauge is attached to the upper part of the elastic sensor body 1 to detect the axial output voltage value, and the feather gauge is attached to the lower part of the elastic sensor body 1 to check the radial output voltage value. When the elastic sensor body 1 is subjected to force, it will generate bending deformation, causing the T-shaped gauge or the feather gauge to stretch or compress. According to R=ρl / s, it can be seen that the lengthening or shortening of the strain grid will affect the change of the strain gauge resistance, thereby causing the output voltage to change.

[0020] It should be noted that although there are four mounting positions 121 in the second annular groove 12, only one transverse strain gauge 3 needs to be attached to each of three of the mounting positions 121 to receive the transverse pressure information of the xy axis; the four mounting positions 121 are equidistantly arranged on the side wall of the second annular groove 12.

[0021] Preferably, a first anti-overload groove 111 is extended inwardly from the upper end surface of the first annular groove 11; a second anti-overload groove 122 is extended inwardly from the upper end surface and the lower end of the second annular groove 12; when the pressure exceeds a predetermined value during measurement, the displacement generated by the first anti-overload groove 111 and the second anti-overload groove 122 will be greater than the normal working displacement, so that the strain of the elastic sensor body 1 is maintained within the elastic strain range, effectively protecting the elastic sensor body 1 from plastic deformation, and effectively increasing the torsional and bending resistance of the tension sensor.

[0022] Preferably, an annular fixing seat 123 is provided in the second annular groove 12 , and four fixing holes 124 are equidistantly provided on the side surface of the annular fixing seat 123 ; the annular fixing seat 123 is used to connect the elastic sensor body 1 with the sensor housing.

[0023] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. The replacements described may be partial structures, devices, or method steps, or they may be complete technical solutions. Any equivalent replacements or modifications based on the technical solution and the concept of the present invention shall be covered by the scope of protection of the present invention.

Claims

1. A novel three-dimensional force sensor, characterized in that: The invention comprises an elastic sensor body (1) of a columnar structure, wherein the upper portion of the elastic sensor body (1) is provided with a first annular groove (11), the lower portion is provided with a second annular groove (12), and the second annular groove (12) is provided with four mounting positions (121); an axial strain gauge (2) is attached to the first annular groove (11), and three of the four mounting positions (121) are respectively provided with a transverse strain gauge (3).

2. The novel three-dimensional force sensor according to claim 1, characterized in that: A first overload prevention groove (111) is formed inwardly extending from the upper end surface of the first annular groove (11).

3. The novel three-dimensional force sensor according to claim 1 or 2, characterized in that: A second overload prevention groove (122) is provided on the upper end surface and the lower end of the second annular groove (12) extending inward.

4. The novel three-dimensional force sensor according to claim 1 or 2, characterized in that: An annular fixing seat (123) is provided in the second annular groove (12), and four fixing holes (124) are equidistantly provided on the side surface of the annular fixing seat (123).

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