Two-dimensional force measurement sensor
By setting staggered and interconnected functional holes on both sides of the parallel beam of the two-dimensional force measurement sensor, the shortcomings of the sensor in terms of measurement accuracy and anti-interference ability are solved, and higher measurement accuracy and stability are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN XINJINGCHENG SENSING TECHNOLOGY CO LTD
- Filing Date
- 2025-06-23
- Publication Date
- 2026-04-28
AI Technical Summary
Existing two-dimensional force measurement sensors are insufficient in terms of measurement accuracy, spatial optimization, and anti-interference capabilities, making it difficult to meet the diverse needs of the market.
The system employs a parallel beam structure with staggered, interconnected functional holes on both sides. By decoupling forces in non-measuring directions, interference is eliminated, improving measurement accuracy and anti-interference capabilities.
By designing a parallel beam structure, higher measurement accuracy and stability were achieved, force interference in non-measurement directions was reduced, and the sensor's anti-interference capability and space utilization efficiency were improved.
Smart Images
Figure CN224175992U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of sensor technology, and in particular to a two-dimensional force measurement sensor. Background Technology
[0002] Two-dimensional force sensors have been widely used in the weighing and force measurement industries. These sensors detect minute deformations by applying force, which are then converted into electrical signals via a Wheatstone bridge. Therefore, the range and size of a typical two-dimensional force sensor are limited by its structure and the size of the strain gauge.
[0003] However, as market demand for two-dimensional force measurement sensors becomes more diverse, the requirements for their accuracy and stability are also increasing. General two-dimensional force measurement sensors are insufficient in terms of measurement accuracy, spatial optimization, and anti-interference capabilities. Utility Model Content
[0004] The embodiments of this application provide a two-dimensional force measurement sensor that can decouple forces in directions not required for measurement through a parallel beam structure, eliminate the influence of forces in other directions on measurement accuracy, and improve the sensor's anti-interference capability and measurement accuracy.
[0005] In a first aspect, embodiments of this application provide a two-dimensional force measurement sensor, the two-dimensional force measurement sensor comprising:
[0006] First elastic body;
[0007] Second elastic body;
[0008] A parallel beam, one end of which is connected to the first elastic body and the other end of which is connected to the second elastic body;
[0009] The parallel beam has a first side and a second side arranged adjacent to each other. The first side is provided with a first functional hole that penetrates the parallel beam, and the second side is provided with a second functional hole that penetrates the parallel beam. The first functional hole and the second functional hole are offset along the axial direction of the parallel beam, and the first functional hole and the second functional hole are connected within the parallel beam.
[0010] In some embodiments, the first functional hole includes a first hole portion, a second hole portion, and a third hole portion that are connected in sequence; the first hole portion and the third hole portion are symmetrically arranged.
[0011] The second functional hole includes a fourth hole section, a fifth hole section, and a sixth hole section that are connected in sequence; the fourth hole section and the sixth hole section are symmetrically arranged.
[0012] In some embodiments, the first hole forms a first sub-beam and a second sub-beam on the first side and the edge of the parallel beam, and the third hole forms a third sub-beam and a fourth sub-beam on the first side and the edge of the parallel beam.
[0013] In some embodiments, the fourth hole forms a fifth sub-beam and a sixth sub-beam on the second side and the edge of the parallel beam, and the sixth hole forms a seventh sub-beam and an eighth sub-beam on the second side and the edge of the parallel beam.
[0014] In some embodiments, the shape of the first hole and the third hole is one of square, round and oblong;
[0015] And / or, the shape of the fourth hole and the sixth hole is one of square, round and oblong.
[0016] In some embodiments, the first elastomer and the second elastomer are each provided with at least one mounting hole;
[0017] In this configuration, the first elastic body serves as the fixed end, and the second elastic body serves as the force-bearing end.
[0018] In some embodiments, the first elastomer is provided with a circuit board, and a cable is connected to the circuit board.
[0019] In some embodiments, the first elastomer and the second elastomer are in the shape of a cube or a cuboid.
[0020] In some embodiments, a first stress sensing element is further provided on the first side, and a second stress sensing element is further provided on the second side;
[0021] The first stress-sensing element is disposed between the first functional hole and the second elastic body, and the second stress-sensing element is disposed between the second functional hole and the first elastic body.
[0022] In some embodiments, the first elastic body, the second elastic body, and the parallel beam are integrally formed;
[0023] And / or, the first elastomer, the second elastomer, and the parallel beam are all made of metallic materials.
[0024] The beneficial effects of this application are: by setting a first functional hole and a second functional hole on the adjacent sides of the parallel beam respectively, and setting the first functional hole and the second functional hole in a staggered and connected manner, space can be saved, and the force in the direction not required for measurement can be decoupled by the structure of the parallel beam, eliminating the influence of the force in other directions on the measurement accuracy, and improving the anti-interference ability and measurement accuracy of the sensor. Attached Figure Description
[0025] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0026] Figure 1 This is a schematic diagram of a sensor structure according to an embodiment of this application;
[0027] Figure 2 This is a schematic diagram of a sensor structure according to another embodiment of this application;
[0028] Figure 3 This is a front view of the first side of a sensor according to an embodiment of this application;
[0029] Figure 4 This is a front view of the second side of a sensor according to an embodiment of this application.
[0030] Explanation of reference numerals in the attached figures:
[0031] 10. First elastic body;
[0032] 20. Second elastic body;
[0033] 30 Parallel beam; 301 First side; 302 Second side; 31 First sub-beam; 32 Second sub-beam; 33 Third sub-beam; 34 Fourth sub-beam; 35 Fifth sub-beam; 36 Sixth sub-beam; 37 Seventh sub-beam; 38 Eighth sub-beam;
[0034] 40 First functional hole; 41 First hole portion; 42 Second hole portion; 43 Third hole portion;
[0035] 50 Second functional hole; 51 Fourth hole section; 52 Fifth hole section; 53 Sixth hole section;
[0036] 60 Mounting hole; 70 First stress sensor; 80 Second stress sensor; 90 Circuit board; 91 Cable. Detailed Implementation
[0037] The technical solutions of the embodiments of this application 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 this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.
[0038] Please refer to Figure 1 One embodiment of this application provides a two-dimensional force measurement sensor, which includes:
[0039] A first elastic body 10; a second elastic body 20; a parallel beam 30, one end of which is connected to the first elastic body 10 and the other end of which is connected to the second elastic body 20; wherein, the parallel beam 30 has a first side 301 and a second side 302 arranged adjacent to each other, the first side 301 is provided with a first functional hole 40 that penetrates the parallel beam 30, and the second side 302 is provided with a second functional hole 50 that penetrates the parallel beam 30; the first functional hole 40 and the second functional hole 50 are offset along the axial direction of the parallel beam 30, and the first functional hole 40 and the second functional hole 50 are connected within the parallel beam 30.
[0040] In this embodiment, the first elastic body 10 and the second elastic body 20 are connected to both ends of the parallel beam 30, one of which is the force-bearing end. When subjected to force, the parallel beam 30 undergoes uniform and predictable deformation, enabling the sensor to measure two-dimensional force. This structural design reduces nonlinearity and hysteresis effects, thereby improving overall measurement accuracy.
[0041] In this embodiment, by providing a first functional hole 40 and a second functional hole 50, the parallel beam 30 can form a two-parallel-beam 30 structure, improving the accuracy of the parallel beam 30 structure. Specifically, the first functional hole 40 is located on the first side 301 of the parallel beam 30 and penetrates through the parallel beam 30, while the second functional hole 50 is located on the second side 302 of the parallel beam 30 and penetrates through the parallel beam 30, thus forming a two-parallel-beam 30 structure. Furthermore, by offsetting and connecting the first functional hole 40 and the second functional hole 50 along the axial direction of the parallel beam 30, space can be efficiently utilized in the same plane, making the sensor design more compact, avoiding the extra space required for alignment, thereby saving overall volume and optimizing space utilization.
[0042] In this embodiment, by designing the first functional hole 40 and the second functional hole 50 to be axially misaligned along the parallel beam 30, the first elastic body 10 and the second elastic body 20 respond in a specific two-dimensional direction (see reference). Figure 1 , Figure 2 , Figure 3 ,and Figure 4 When forces are applied in the FX and FZ directions, structural separation is achieved through a staggered design, ensuring that forces in other directions (forces not required for measurement) do not interfere with the measurement results. This effectively decouples the sensor and improves its stability and anti-interference capabilities.
[0043] In one embodiment, this application can be applied to a small-range two-dimensional force measurement sensor.
[0044] In one embodiment, this application can also be applied to multidimensional force measurement.
[0045] In one embodiment, this application can be applied to fields such as robotics, medical, and precision manufacturing.
[0046] Please refer to Figure 1 , Figure 3 and Figure 4 In one embodiment, the first functional hole 40 includes a first hole portion 41, a second hole portion 42, and a third hole portion 43 connected in sequence; the first hole portion 41 and the third hole portion 43 are symmetrically arranged; the second functional hole 50 includes a fourth hole portion 51, a fifth hole portion 52, and a sixth hole portion 53 connected in sequence; the fourth hole portion 51 and the sixth hole portion 53 are symmetrically arranged.
[0047] In this embodiment, the structure of the first functional hole 40 is optimized. The first functional hole 40 consists of three sequentially connected holes: a first hole 41, a second hole 42, and a third hole 43. These holes are connected together in a specific way to form a continuous channel or structure. The first hole 41 and the third hole 43 are symmetrically distributed in space to ensure more uniform force transmission and avoid local stress concentration. Similarly, the design of the second functional hole 50 is similar to that of the first functional hole 40. Its fourth hole 51 and sixth hole 53 are symmetrically distributed in space. This arrangement can further optimize the force transmission path and ensure consistent sensor response in different directions.
[0048] In this embodiment, the processing of the first functional hole 40 and the second functional hole 50 can be achieved in various ways, such as forming holes of a specific shape on the material through precision machining technology, or constructing complex internal structures through 3D printing technology. In specific implementation, appropriate materials (such as metals, plastics, or composite materials) can be selected, and their symmetry and connectivity can be ensured.
[0049] In this embodiment, the above design enables the two-dimensional force measurement sensor to transmit and distribute force more evenly, thereby improving the accuracy and stability of the measurement. The symmetrically arranged first functional hole 40 and second functional hole 50 effectively reduce stress concentration and extend the sensor's lifespan. Furthermore, this structural design provides more signal transmission paths, further enhancing the sensor's sensitivity and response speed.
[0050] Please refer to Figure 3 In one embodiment, the first hole 41 forms a first sub-beam 31 and a second sub-beam 32 at the edge of the first side 301 and the parallel beam 30, and the third hole 43 forms a third sub-beam 33 and a fourth sub-beam 34 at the edge of the first side 301 and the parallel beam 30.
[0051] In this embodiment, a first sub-beam 31 and a second sub-beam 32 are formed through the first hole 41 and the edge of the parallel beam 30, and a third sub-beam 33 and a fourth sub-beam 34 are formed through the third hole 43 and the edge of the parallel beam 30. This design decomposes the originally single large beam into multiple small beams, thereby distributing the stress under external force more evenly, reducing structural damage caused by concentrated stress, and improving the sensitivity and measurement accuracy of the two-dimensional force measurement sensor. Specifically, through the interaction between the small beams, the changes in external force can be reflected more accurately, enhancing the structural strength and stability of the sensor under stress.
[0052] Please refer to Figure 4 In one embodiment, the fourth hole 51 forms a fifth sub-beam 35 and a sixth sub-beam 36 at the edge of the second side 302 and the parallel beam 30, and the sixth hole 53 forms a seventh sub-beam 37 and an eighth sub-beam 38 at the edge of the second side 302 and the parallel beam 30.
[0053] In this embodiment, similar to the previous embodiment, fifth, sixth, seventh, and eighth sub-beams 38 are formed by the fourth hole 51 and the sixth hole 53 and the edge of the parallel beam 30, respectively, reducing the risk of deformation due to stress concentration. Furthermore, this structural design allows the two-dimensional force measurement sensor to distribute stress more evenly when subjected to external forces, thereby improving measurement accuracy and reliability, and extending the sensor's service life.
[0054] Please refer to Figure 3 and Figure 4 In one embodiment, the first hole portion 41 and the third hole portion 43 are square, circular and oblong in shape; and / or, the fourth hole portion 51 and the sixth hole portion 53 are square, circular and oblong in shape.
[0055] In this embodiment, by designing the hole shapes of the first hole 41 and the third hole 43 as square, circular, or oblong, the structural strength and stability of the two-dimensional force measurement sensor can be improved, while providing higher processing accuracy and load distribution capability. Different hole shapes can be selected to optimize performance according to actual application requirements, thereby enhancing the overall performance and reliability of the sensor. Similarly, the design of the fourth hole 51 and the sixth hole 53 also provides the sensor with greater design flexibility and adjustability, meeting different installation and usage requirements, further enhancing the sensor's practicality and adaptability.
[0056] Please refer to Figure 1 and Figure 2 In one embodiment, the first elastic body 10 and the second elastic body 20 are each provided with at least one mounting hole 60; wherein the first elastic body 10 serves as a fixed end and the second elastic body 20 serves as a force-bearing end.
[0057] In this embodiment, the sensor can be easily fixed to an external structure via the mounting hole 60, allowing the force-bearing end to independently withstand external forces, thus improving the sensor's installation flexibility and measurement accuracy. Furthermore, providing the mounting hole 60 simplifies the sensor assembly process and reduces assembly difficulty.
[0058] In this embodiment, a first elastic body 10 is set as a fixed end for fixing the sensor to an external structure; a second elastic body 20 is set as a force-bearing end for bearing external force and generating deformation to achieve force measurement, so that the sensor can generate a clear deformation signal when subjected to force, thereby improving the measurement sensitivity and accuracy.
[0059] In one embodiment, the mounting hole 60 can be one or more of a through hole, a blind hole, and a pin hole, and its specific shape and size can be customized according to actual needs. The mounting hole 60 is used to fix the elastomer to the corresponding position, for example, by bolts, rivets, or other connection methods. Furthermore, this application does not limit the number of mounting holes 60, and the number of mounting holes 60 can be customized according to actual needs.
[0060] Please refer to Figure 2 In one embodiment, a circuit board 90 is provided on the first elastic body 10, and a cable 91 is connected to the circuit board 90.
[0061] In this embodiment, the first elastic body 10 is a key component for sensing and transmitting force signals. A circuit board 90 is mounted on the first elastic body 10 to convert mechanical deformation into electrical signals. The circuit board 90 is connected to an external device via a cable 91 to ensure that measurement data can be transmitted to a processing system for analysis and display.
[0062] Please refer to Figure 1 and Figure 2 In one embodiment, the first elastic body 10 and the second elastic body 20 are cubes or cuboids.
[0063] In this embodiment, by designing the first elastic body 10 and the second elastic body 20 as cubes or cuboids, the structural stability of the two-dimensional force measurement sensor can be significantly improved, and it is easier to install or use with other components. This shape selection also makes it easier to achieve high-precision dimensional control of the elastic bodies during manufacturing, thereby improving interchangeability and reliability. Simultaneously, the cube and cuboid shapes of the elastic bodies have a large surface area to volume ratio, which helps to improve the sensor's sensitivity and measurement accuracy. Furthermore, this design allows for convenient surface treatment (such as smoothing or texturing) to further optimize the sensor's performance.
[0064] Please refer to Figure 2In one embodiment, a first stress sensing element 70 is further provided on the first side 301, and a second stress sensing element 80 is further provided on the second side 302; wherein, the first stress sensing element 70 is disposed between the first functional hole 40 and the second elastic body 20, and the second stress sensing element 80 is disposed between the second functional hole 50 and the first elastic body 10.
[0065] In this embodiment, stress sensing elements are respectively provided on the first side 301 and the second side 302 of the two-dimensional force measurement sensor. These stress sensing elements are used to detect stress changes. The first stress sensing element 70 is installed between the first functional hole 40 and the second elastic body 20, and can sense the deformation of the first elastic body 10; similarly, the second stress sensing element 80 is disposed between the second functional hole 50 and the first elastic body 10, and can measure the force on the second elastic body 20. This structural design enables the sensor to accurately capture changes in external force in different directions.
[0066] In this embodiment, by installing stress sensing elements on two adjacent sides, the sensor can sense the force in the corresponding direction and convert these forces into measurable electrical signals, thereby achieving accurate measurement of two-dimensional forces.
[0067] In one embodiment, the first elastic body 10, the second elastic body 20, and the parallel beam 30 are integrally formed; and / or, the first elastic body 10, the second elastic body 20, and the parallel beam 30 are all made of metal.
[0068] In this embodiment, by designing the first elastic body 10, the second elastic body 20, and the parallel beam 30 as a single integral molding, the overall rigidity and reliability of the sensor can be significantly improved. Furthermore, using metal as the material for these components not only provides better durability and the ability to withstand greater loads, but also offers good corrosion resistance. This arrangement also facilitates structural fabrication.
[0069] In one embodiment, the first elastic body 10, the second elastic body 20, and the parallel beam 30 are all made of aluminum alloy.
[0070] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.
Claims
1. A two-dimensional force measurement sensor, characterized in that, The two-dimensional force measurement sensor includes: First elastic body; Second elastic body; A parallel beam, one end of which is connected to the first elastic body and the other end of which is connected to the second elastic body; The parallel beam has a first side and a second side arranged adjacent to each other. The first side is provided with a first functional hole that penetrates the parallel beam, and the second side is provided with a second functional hole that penetrates the parallel beam. The first functional hole and the second functional hole are offset along the axial direction of the parallel beam, and the first functional hole and the second functional hole are connected within the parallel beam.
2. The two-dimensional force measurement sensor according to claim 1, characterized in that, The first functional hole includes a first hole portion, a second hole portion, and a third hole portion connected in sequence; the first hole portion and the third hole portion are symmetrically arranged. The second functional hole includes a fourth hole section, a fifth hole section, and a sixth hole section that are connected in sequence; the fourth hole section and the sixth hole section are symmetrically arranged.
3. The two-dimensional force measurement sensor according to claim 2, characterized in that, The first hole forms a first sub-beam and a second sub-beam on the first side and the edge of the parallel beam, and the third hole forms a third sub-beam and a fourth sub-beam on the first side and the edge of the parallel beam.
4. The two-dimensional force measurement sensor according to claim 3, characterized in that, The fourth hole forms a fifth sub-beam and a sixth sub-beam on the second side and the edge of the parallel beam, and the sixth hole forms a seventh sub-beam and an eighth sub-beam on the second side and the edge of the parallel beam.
5. The two-dimensional force measurement sensor according to claim 4, characterized in that, The shape of the first hole and the third hole is one of square, round and oblong; And / or, the shape of the fourth hole and the sixth hole is one of square, round and oblong.
6. The two-dimensional force measurement sensor according to claim 1, characterized in that, The first elastic body and the second elastic body are each provided with at least one mounting hole; In this configuration, the first elastic body serves as the fixed end, and the second elastic body serves as the force-bearing end.
7. The two-dimensional force measuring sensor according to claim 6, characterized in that, The first elastomer is provided with a circuit board, and a cable is connected to the circuit board.
8. The two-dimensional force measurement sensor according to claim 6, characterized in that, The first elastomer and the second elastomer are in the shape of a cube or a cuboid.
9. The two-dimensional force measurement sensor according to claim 1, characterized in that, The first side is also provided with a first stress sensing element, and the second side is also provided with a second stress sensing element; The first stress-sensing element is disposed between the first functional hole and the second elastic body, and the second stress-sensing element is disposed between the second functional hole and the first elastic body.
10. The two-dimensional force measurement sensor according to claim 1, characterized in that, The first elastic body, the second elastic body, and the parallel beam are integrally formed; And / or, the first elastomer, the second elastomer, and the parallel beam are all made of metallic materials.