Counter-cutting strain beam tension sensor

Abstract

The present application relates to a kind of tension sensors, especially a kind of reverse shear strain beam tension sensor, including tension sensor body, tension sensor body at least includes support end and first cantilever, rigid connection is connected between support end and first cantilever, first cantilever is used to bear the load applied to tension sensor body, and ensure the stability of entire tension sensor structure, first cantilever end is fixedly provided with free end, free end side wall is rigidly connected with sleeve, sleeve other end is fixedly connected with the side of connecting end, sleeve is used to ensure that external load is evenly distributed to entire sensor structure. Double cantilever structure is formed by first cantilever and sleeve, bending moment generated by the weakest part of shear beam is reduced by second cantilever, double cantilever reverse shear strain beam can operate at much lower stress level than single cantilever shear beam, with high structural strength, high overload capacity and fatigue resistance.

Description

Technical Field

[0001] This invention relates to a tension sensor, and more particularly to a shear strain beam tension sensor. Background Technology

[0002] With the development of process equipment, the stability of material tension is improving, and the detection accuracy and stability of material tension measurement are also improving. However, the problems of conventional tension sensors, such as being greatly affected by the environment, having low protection, single force measurement direction, and poor sensor stability, are becoming more and more obvious.

[0003] When an external load is applied to a tension sensor, the strain zone of an existing single cantilever tension sensor suffers from stress concentration, causing the strain or stress in that area to exceed the material's load-bearing capacity, thereby affecting the stability and reliability of the sensor. Therefore, the purpose of this invention is to provide a reverse shear strain beam tension sensor to improve the monitoring accuracy of the tension sensor. Summary of the Invention

[0004] The purpose of this invention is to solve the problem of stress concentration in the strain zone of the single cantilever structure tension sensor proposed in the background art by proposing a reverse shear strain beam tension sensor, which causes the strain or stress in the region to exceed the material's bearing capacity.

[0005] The technical solution adopted in this invention is as follows:

[0006] A shear strain beam tension sensor is provided, comprising a tension sensor body, the tension sensor body including at least a support end and a first cantilever, the support end and the first cantilever being rigidly connected by a connecting end, the first cantilever being used to bear the load applied to the tension sensor body and to ensure the stability of the entire tension sensor structure, a free end being fixedly provided at the end of the first cantilever, a sleeve being rigidly connected to the side wall of the free end, the other end of the sleeve being fixedly connected to one side of the connecting end, the sleeve being used to ensure that the external load is evenly distributed throughout the sensor structure.

[0007] As a preferred technical solution of the present invention: the first cantilever sidewall is further provided with a strain zone, which is used to install a tension sensor and to measure the strain force.

[0008] As a preferred embodiment of the present invention: a gap is reserved between the inner wall of the sleeve and the outer wall of the first cantilever, and a plurality of support rings are fixedly installed in the gap.

[0009] As a preferred embodiment of the present invention: the support ring is located near the free end, and a plurality of the support rings are evenly arranged.

[0010] As a preferred technical solution of the present invention: the support ring has a ring structure and is used to provide support for the first cantilever and the sleeve, thereby improving the stability of the entire structure.

[0011] As a preferred technical solution of the present invention: the inner wall of the sleeve is closely fitted with the outer wall of the first cantilever, which is used to transfer external strain to the strain zone through the contact surface.

[0012] As a preferred technical solution of the present invention: one end of the support end is provided with a wire outlet, which is used to connect the internal cable of the sensor to the outside of the sensor.

[0013] As a preferred embodiment of the present invention: the support end, the first cantilever and the sleeve are all cylindrical structures, and the sleeve is nested and installed on the outside of the first cantilever.

[0014] As a preferred embodiment of the present invention, the strain zone is located on the side wall of the first cantilever near the free end.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] In this type of anti-shear strain beam tension sensor, a double cantilever structure is formed by a first cantilever and a sleeve. When a load is applied, the second cantilever brings the load application point to the point directly above the anti-shear zone. The bending moment of the entire strain zone is close to zero. By reducing the bending moment generated by the weakest part of the shear beam through the second cantilever, the double cantilever anti-shear beam can operate at a stress level much lower than that of a single cantilever shear beam. It has high structural strength, high overload capacity and fatigue resistance.

[0017] Meanwhile, as part of the sensor structure, the sleeve provides additional support and stability, which helps maintain the structural stability of the sensor and ensures that the sensor will not deform excessively when subjected to external loads. In addition, the sleeve is used to transfer external loads, ensuring that the external loads can be evenly distributed throughout the entire sensor structure, reducing local stress concentration in the structure. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the tension sensor in preferred embodiment 1 of the present invention;

[0019] Figure 2 This is a schematic cross-sectional view of the sleeve structure in preferred embodiment 1 of the present invention;

[0020] Figure 3 This is a partial cross-sectional view of the planar structure of the tension sensor in preferred embodiment 2 of the present invention.

[0021] The meanings of the various markings in the diagram are as follows:

[0022] 1. Support end; 101. Connecting end; 102. Outgoing cable end;

[0023] 2. First cantilever; 201. Free end; 202. Strain zone;

[0024] 3. Sleeve;

[0025] 4. Support ring. Detailed Implementation

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in this embodiment can be combined with each other. The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0027] Example 1:

[0028] Please see Figures 1-2 As shown, the purpose of this embodiment is to provide a shear strain beam tension sensor, including a tension sensor body. The tension sensor body includes at least a support end 1 and a first cantilever 2. One end of the support end 1 is provided with a wire outlet 102, which is used to connect the internal cable of the sensor to the outside of the sensor. The first cantilever 2 is used to support, transmit loads and generate bending deformation, while ensuring the stability and accuracy of the entire sensor structure. A connecting end 101 is rigidly connected between the support end 1 and the first cantilever 2. The first cantilever 2 is used to bear the load applied to the tension sensor body and ensure the stability of the entire tension sensor structure. A free end 201 is fixedly provided at the end of the first cantilever 2. A sleeve 3 is rigidly connected to the side wall of the free end 201. The other end of the sleeve 3 is fixedly connected to one side of the connecting end 101. The sleeve 3 is used to ensure that the external load is evenly distributed to the entire sensor structure.

[0029] The first cantilever 2 sidewall is also provided with a strain zone 202. The strain zone 202 is located at the end of the first cantilever 2 sidewall near the free end 201. The strain zone 202 is used to install a tension sensor and to measure the strain force. The inner wall of the sleeve 3 is in close contact with the outer wall of the first cantilever 2, so as to transfer the external strain to the strain zone 202 through the contact surface, thereby improving the accuracy of the measurement.

[0030] Among them, the support end 1, the first cantilever 2 and the sleeve 3 are all cylindrical structures, and are preferably made of alloy steel. The cylindrical structure is used to meet the requirement that the tension sensor can be installed at any installation angle, and the sleeve 3 is nested on the outside of the first cantilever 2.

[0031] Sleeve 3 serves as the second cantilever and is rigidly connected to the free end 201. Therefore, the first cantilever 2 and sleeve 3 form a double cantilever structure. When a load is applied, the second cantilever brings the load application point to the point directly above the strain zone 202. The bending moment of the entire strain zone 202 is close to zero. By reducing the bending moment generated by the weakest part of the shear beam through the second cantilever, the double cantilever shear strain beam can operate at a stress level far lower than that of the single cantilever shear beam. It has high structural strength, high overload capacity, and fatigue resistance.

[0032] Furthermore, as part of the sensor structure, the sleeve 3 provides additional support and stability, which helps maintain the structural stability of the sensor and ensures that the sensor will not deform excessively when subjected to external loads; and the sleeve 3 is used to transfer external loads, ensuring that the external loads can be evenly distributed throughout the entire sensor structure, reducing local stress concentration in the structure.

[0033] The double cantilever structure, consisting of the first cantilever 2 and the sleeve 3, can generate shear force in the strain zone 202. This shear force is generated within the strain zone 202 due to the bending deformation of the strain beam under external force or pressure. When an external load is applied to the cantilever, the cantilever will bend, resulting in shear force within the strain zone 202. This shear force can be measured and monitored by a strain sensor, thus enabling the measurement and monitoring of the external load. At the same time, the double cantilever structure can increase the overall strength and stability of the sensor, allowing it to withstand greater external loads without structural damage.

[0034] In this tension sensor, the change in tension is converted into a change in resistance value through a Wheatstone bridge. The change in tension is indirectly measured by measuring the change in resistance value. The Wheatstone bridge is installed on the tension sensor body and is used to measure the change in tension or pulling force sensed by the sensor.

[0035] Example 2:

[0036] Please see Figure 3 As shown, the difference between Embodiment 2 and Embodiment 1 is that Embodiment 2 provides a shear strain beam tension sensor. A gap is reserved between the inner wall of the sleeve 3 and the outer wall of the first cantilever 2, and several support rings 4 are fixedly installed in the gap. The support rings 4 are located near the free end 201, and several support rings 4 are evenly arranged. The support rings 4 have a ring structure and are used to provide support for the first cantilever 2 and the sleeve 3, thereby improving the stability of the entire structure. The support rings 4 are used to control the deflection of the cantilever, thereby ensuring that the sensor can accurately measure the change of external strain or force. The support rings 4 are preferably any one of aluminum alloy, carbon iron alloy and titanium alloy. The support rings 4 are used to provide necessary support at the free end 201 to counteract the bending force generated by the external load.

[0037] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0038] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A shear strain beam tension sensor, comprising a tension sensor body, the tension sensor body comprising at least a support end (1), a first cantilever (2), and a sleeve (3), characterized in that: The support end (1) is rigidly connected to the first cantilever (2) by a connecting end (101). The first cantilever (2) is used to bear the load applied to the tension sensor body. A strain zone (202) is provided on the side wall of the first cantilever (2). The strain zone (202) is located on the side wall of the first cantilever (2) near the free end (201) and is used to install the strain sensor and measure the strain force. A free end (201) is fixedly provided at the end of the first cantilever (2). A sleeve (3) is rigidly connected to the side wall of the free end (201). The other end of the sleeve (3) is fixedly connected to one side of the connecting end (101). The sleeve (3) serves as the second cantilever. The cantilever and the first cantilever (2) form a double cantilever reverse shear structure. When an external load is applied, the second cantilever will bring the load application point to the point directly above the strain zone (202), so that the bending moment of the entire strain zone (202) is close to zero. A gap is reserved between the inner wall of the sleeve (3) and the outer wall of the first cantilever (2), and several support rings (4) are fixedly installed in the gap. The support rings (4) are located near the free end (201), and several support rings (4) are evenly arranged. The support rings (4) have a ring structure and are used to provide radial support for the first cantilever (2) and the sleeve (3) and control the deflection of the cantilever to counteract the bending force generated by the external load.

2. The anti-shear strain beam tension sensor according to claim 1, characterized in that: One end of the support end (1) is provided with a wire outlet (102), which is used to connect the internal cable of the sensor to the outside of the sensor.

3. The anti-shear strain beam tension sensor according to claim 1, characterized in that: The support end (1), the first cantilever (2) and the sleeve (3) are all cylindrical structures, and the sleeve (3) is nested and installed on the outside of the first cantilever (2).

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