Two-dimensional force sensor and crash dummy

Abstract

The utility model is suitable for the technical field of sensors, and provides a two-dimensional force sensor and a crash dummy. The two-dimensional force sensor comprises a first mounting flange, a second mounting flange, an elastic body and a strain gauge. The first mounting flange is matched with the femoral head to at least transmit the stress of the femoral head; the second mounting flange is used for being fixed on the ilium; the elastic body is used for receiving force transmitted by the first mounting flange and generating deformation, and the first mounting flange and the second mounting flange are connected to the two opposite sides of the elastic body respectively; the strain gauge is attached to the elastic body. The first mounting flange is provided with the groove which is matched and connected with the femoral head, and the shape of the groove is matched with that of the femoral head, so that the connection of the femoral head can be well accommodated, the stress of the connection part can be sensitively detected, the detection accuracy is improved, and the detection efficiency is improved. And the effectiveness of the detection result of the collision dummy in the collision test is improved.

Description

Technical Field

[0001] This utility model belongs to the field of sensor technology, and in particular relates to a two-dimensional force sensor and a collision dummy. Background Technology

[0002] Crash dummies, through high-precision simulation and data acquisition, have become an indispensable tool in vehicle safety research and development. In real-vehicle crash tests, dummies are used to simulate the extent of damage experienced by real people during a collision. Therefore, accurate data collection of the forces acting on the dummies during the crash test is crucial to the success of the test.

[0003] To analyze the force distribution between the iliac crest and femoral head of a dummy during a collision, sensors are typically placed at the junction of the iliac crest and femoral head to obtain data. However, in some related technologies, the sensors at the junction do not fit snugly against the femoral head, affecting the accuracy of the measurements. Utility Model Content

[0004] In view of this, the present invention provides a two-dimensional force sensor and a collision dummy to solve the problem of poor detection accuracy caused by insufficient fit between the sensor and the femoral head.

[0005] To solve the above problems, the technical solution of this utility model is implemented as follows:

[0006] A two-dimensional force sensor, installed at the junction of the iliac crest and femoral head of a collision dummy, includes: a first mounting flange for cooperating with the femoral head to at least transmit the force on the femoral head; a second mounting flange for fixing to the iliac crest, the second mounting flange having a mounting structure for connecting to the iliac crest; an elastomer for receiving the force transmitted by the first mounting flange and deforming, the first mounting flange being connected to one side of the elastomer via a first connecting structure, the second mounting flange being connected to the opposite side of the elastomer via a second connecting structure, the projections of the first connecting structure and the second connecting structure in a first direction at least partially not overlapping; and a strain gauge attached to the elastomer for detecting the deformation of the elastomer; wherein the first mounting flange has a groove for cooperating with the femoral head, the shape of the groove matching the shape of the femoral head.

[0007] In some embodiments, the groove is recessed toward the interior of the first mounting flange, and the outline of the groove is projected in the first direction as a rugby ball shape.

[0008] In some embodiments, the elastomer has a structural hole, and the strain gauge is attached inside the structural hole; wherein the axis of the structural hole is perpendicular to the first direction.

[0009] In some embodiments, the elastomer has a first patch surface facing the first mounting flange and a second patch surface facing the second mounting flange, and the strain gauge is attached to both the first patch surface and the second patch surface.

[0010] In some embodiments, the elastomer is further provided with a wiring groove communicating with the structural hole, and the wiring groove extends to the first patch surface and the second patch surface; wherein the wires electrically connected to each strain gauge are disposed in the wiring groove.

[0011] In some embodiments, the first connecting structure and the second connecting structure are located at opposite ends of the elastomer.

[0012] In some embodiments, both the first connecting structure and the second connecting structure are connecting screw holes, and fastening bolts are inserted into each connecting screw hole.

[0013] In some embodiments, a first deformation gap is formed between the first mounting flange and the elastomer; and / or, a second deformation gap is formed between the second mounting flange and the elastomer.

[0014] In some embodiments, the two-dimensional force sensor further includes: a cable, one end of which is electrically connected to each of the strain gauges and the other end of which is connected to an external detection device; a pad, which presses against the cable; and a fixing block, which presses against the pad and is connected to the second mounting flange by fasteners to fix the cable and the pad.

[0015] This utility model embodiment also provides a collision dummy, including a prosthesis and a two-dimensional force sensor as described in any of the above embodiments, wherein the two-dimensional force sensor is installed at the connection between the iliac bone and the femoral head in the prosthesis.

[0016] This invention provides a two-dimensional force sensor and a collision dummy. The two-dimensional force sensor includes a first mounting flange, a second mounting flange, an elastomer, and strain gauges. The first mounting flange mates with the femoral head to transmit at least the force on the femoral head; the second mounting flange is fixed to the iliac bone; the elastomer receives the force transmitted by the first mounting flange and deforms, with the first and second mounting flanges respectively connected to opposite sides of the elastomer; the strain gauge is attached to the elastomer and used to detect the deformation of the elastomer. In this embodiment, the two-dimensional force sensor can better adapt to the assembly between the iliac bone and the femoral head in the collision dummy. By using a groove on the first mounting flange that mates with the femoral head, and the shape of the groove matching the shape of the femoral head, the connection of the femoral head can be better accommodated. Therefore, the force at the connection point can be sensitively detected, improving the accuracy of the detection and thus enhancing the effectiveness of the detection results in the collision test of the collision dummy. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the first three-dimensional structure of the two-dimensional force sensor provided in this embodiment of the utility model;

[0018] Figure 2 This is an exploded view of the two-dimensional force sensor provided in this embodiment of the utility model;

[0019] Figure 3 This is a schematic diagram of the second three-dimensional structure of the two-dimensional force sensor provided in this embodiment of the utility model.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1. Two-dimensional force sensor; 10. Cable; 11. First mounting flange; 111. First connecting structure; 112. Groove; 12. Second mounting flange; 121. Mounting structure; 122. Second connecting structure; 13. Elastomer; 130. Structural hole; 131. First patch surface; 132. Second patch surface; 133. Wiring groove; 14. Strain gauge; 15. Fastening bolt; 16. First deformation gap; 17. Second deformation gap; 18. Pad; 19. Fixing block; 191. Fastener. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0023] The specific technical features described in the specific embodiments can be combined in any suitable manner without contradiction. For example, different combinations of specific technical features can form different embodiments and technical solutions. To avoid unnecessary repetition, the various possible combinations of the specific technical features in this utility model will not be described separately.

[0024] In the following description, the terms "first," "second," and "..." are used merely to distinguish different objects and do not indicate that the objects have the sameness or relationship. It should be understood that the directional descriptions "above," "below," "outside," and "inside" refer to the orientation under normal use conditions, while "left" and "right" refer to the left and right directions shown in the corresponding diagrams, which may or may not be the left and right directions under normal use conditions.

[0025] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. "A plurality of" means two or more.

[0026] like Figure 1 As shown in the illustration, this utility model provides a two-dimensional force sensor 1, which is installed at the junction of the iliac crest and femoral head of a collision dummy. This collision dummy is used in real-world vehicle collision tests to simulate the degree of damage experienced by a human during a collision. The two-dimensional force sensor 1 is used to detect the force at the junction of the iliac crest and femoral head during the collision test. By installing the two-dimensional force sensor 1 at this junction, force data can be obtained, providing data support for the research and development of vehicle safety performance. Specifically, the junction of the iliac crest and femoral head is typically where the seatbelt acts on the body. Therefore, by installing the two-dimensional force sensor 1 at this location to check the force on this area, the aim is to quantify the force state of the pelvic region during a collision, providing key biomechanical data for the optimization of vehicle passive safety systems.

[0027] Specifically, the principle of the two-dimensional force sensor 1 for detecting force is as follows: "When the two-dimensional force sensor 1 is subjected to an external force, it undergoes a certain deformation. By detecting the degree of deformation (also known as strain), the change in the current force can be determined." The detection of strain in the two-dimensional force sensor 1 is achieved through the strain gauge 14 inside the sensor. The strain gauge 14 is typically made of conductive or semiconductor material and has a sensitive grid structure, used to measure strain. When the strain gauge 14 undergoes mechanical deformation under external force, its resistance changes accordingly; this phenomenon is called the "strain effect." In use, the strain gauge 14 is attached to the detection point of a component (such as an elastic body). When the component is subjected to force, strain occurs at the detection point, and the sensitive grid deforms accordingly, causing a change in its resistance. The magnitude of this resistance change is then measured by a detection instrument and converted into a strain value at the detection point, thus revealing the force at that point.

[0028] The sensitive grid of strain gauge 14 is a set of parallel wires arranged in a zigzag pattern along a narrow conductor strip. This arrangement accumulates minute deformations along the baseline to form a larger cumulative value of resistance change. The specific detection principle of strain gauge 14 utilizes the physical and geometric properties of conductors. When a conductor is stretched within its elastic limit, it will not break or undergo permanent deformation but will instead narrow and lengthen, resulting in increased terminal resistance. Conversely, when a conductor is compressed, it will widen and shorten, resulting in decreased terminal resistance. Strain gauge 14 is connected via a Wheatstone bridge circuit, converting the resistance change into a voltage signal output. Thus, by measuring the resistance of strain gauge 14, the strain in its covered area can be calculated.

[0029] like Figure 1 As shown, the two-dimensional force sensor 1 includes a first mounting flange 11, a second mounting flange 12, an elastomer 13, and a strain gauge 14. The first mounting flange 11 is used to mate with the femoral head to at least transmit the force on the femoral head. The second mounting flange 12 is used to fix itself to the ilium, and the second mounting flange 12 is provided with a mounting structure 121 for connecting to the ilium (see reference). Figure 2 Thus, the entire two-dimensional force sensor 1 can be fixedly installed at the junction of the iliac bone and the femoral head through the mounting structure 121. The shapes of the first mounting flange 11 and the second mounting flange 12 are matched with the shape of the space available for installation at the installation location, thereby enabling fixed installation.

[0030] Specifically, such as Figure 1 and Figure 2 As shown, the elastic body 13 receives the force transmitted by the first mounting flange 11 and deforms. The first mounting flange 11 is connected to one side of the elastic body 13 via a first connecting structure 111, and the second mounting flange 12 is connected to the opposite side of the elastic body 13 via a second connecting structure 122. Furthermore, the projections of the first connecting structure 111 and the second connecting structure 122 in the first direction do not overlap at least partially. With this configuration, the elastic body 13 is connected between the first mounting flange 11 and the second mounting flange 12, allowing the first mounting flange 11 to transmit the force to be detected to the elastic body 13, causing deformation that can be used for detection. A strain gauge 14 for detecting the stress and strain of the elastic body 13 is attached to the elastic body 13, so that when the elastic body 13 deforms, the strain gauge 14 deforms synchronously, causing a change in resistance, thus revealing the stress state of the elastic body 13.

[0031] like Figure 1As shown, the projections of the first connecting structure 111 and the second connecting structure 122 in the first direction do not overlap at least partially. Specifically, the first mounting flange 11 and the elastic body 13 are supported by the first connecting structure 111, which facilitates the transmission of force between them; the second mounting flange 12 and the elastic body 13 are supported by the second connecting structure 122, which facilitates the transmission of force between them. By ensuring that the projections of the first connecting structure 111 and the second connecting structure 122 in the first direction do not overlap at least partially, the two support points are staggered, forming a lever arm under stress. Therefore, when the first mounting flange 11 is subjected to force, the elastic body 13 can deform more sensitively through the action of the lever arm, thereby enabling the detection of the stress condition.

[0032] The "first direction" mentioned above refers to Figure 1 In the vertical direction shown, in the first direction, the projections of the first connecting structure 111 and the second connecting structure 122 onto the elastic body 13 will at least partially not overlap. That is, the positions of the first connecting structure 111 and the second connecting structure 122 are not located on opposite sides of the same part of the elastic body 13, thereby improving the sensitivity of detection.

[0033] The two-dimensional force sensor 1 provided in this embodiment of the present invention employs a groove 112 on the first mounting flange 11 that mates with the femoral head, and the shape of the groove 112 matches the shape of the femoral head. Specifically, since the femoral head has a basically stable shape, the shape of the groove 112 is set to match the shape of the femoral head. In this way, when the femoral head is inserted into the groove 112, the femoral head and the groove 112 have a high degree of matching and good fit. As a result, there is a large contact area between the femoral head and the first mounting flange 11, and the force on the femoral head can be transmitted to the elastomer 13 in a timely manner through the first mounting flange 11 for detection. The accuracy is good, which better meets the need for accurate detection of the force at the junction of the iliac bone and the femoral head.

[0034] This utility model provides a two-dimensional force sensor 1, comprising a first mounting flange 11, a second mounting flange 12, an elastomer 13, and a strain gauge 14. The first mounting flange 11 mates with the femoral head to transmit at least the force on the femoral head; the second mounting flange 12 is fixed to the iliac bone to achieve fixation at the detection position. The elastomer 13 receives the force transmitted by the first mounting flange 11 and deforms, with the first mounting flange 11 and the second mounting flange 12 respectively connected to opposite sides of the elastomer 13. The strain gauge 14 is attached to the elastomer 13 and is used to detect the deformation of the elastomer 13. In this utility model embodiment, by providing a groove 112 on the first mounting flange 11 to mate with the femoral head, and by matching the shape of the groove 112 to the shape of the femoral head, the connection of the femoral head can be better accommodated, resulting in a high degree of fit at the connection and a large contact area, thereby enabling sensitive detection of the force at the connection and improving the accuracy of the detection. Furthermore, the shape of the two-dimensional force sensor 1 can be well adapted to the assembly between the ilium and femoral head in the collision dummy, and can well meet the installation requirements at the connection between the ilium and femoral head, which is ingenious.

[0035] like Figure 1 and Figure 3 As shown, in some embodiments, the groove 112 is recessed towards the interior of the first mounting flange 11, and in Figure 1 In the shown state, when viewed from a direction perpendicular to the paper, the groove 112 is U-shaped. Simultaneously, the projection of the groove 112's outline in the first direction resembles a rugby ball. This design ensures that the groove 112 does not increase the volume of the first mounting flange 11, facilitating the miniaturization of the entire sensor design. Furthermore, setting the outline of the groove 112 to a rugby ball shape in the first direction provides a larger accommodating opening, facilitating fitting with the femoral head and ensuring good contact for reliable force transmission. Additionally, the rugby ball shape of the groove 112 allows the structures at both ends to provide deformation space for the femoral head to swing in both directions within the groove 112, further improving the compatibility with the femoral head.

[0036] like Figure 1 As shown, in some embodiments, a structural hole 130 is formed on the elastic body 13, and a strain gauge 14 is attached inside the structural hole 130. Specifically, the structural hole 130 is formed on the elastic body 13 such that the axis of the structural hole 130 is perpendicular to the first direction. Thus, the structural hole 130 can be formed in... Figure 1The elastic body 13 in the shown state has a blind hole structure on its front or rear, or a through hole structure penetrating both the front and rear of the elastic body 13. Strain gauges 14 are attached to the inner wall of the structural holes 130, and the number of gauges is set according to the required detection specifications, so as to form a Wheatstone bridge in the first dimension, thereby realizing the detection of force in the first dimension (the X-axis direction in the Cartesian coordinate system). That is, realizing the detection of tensile or compressive forces on the elastic body 13 in the X-axis direction.

[0037] like Figure 1 and Figure 2 As shown, in some embodiments, the elastomer 13 has a first patch surface 131 facing the first mounting flange 11 and a second patch surface 132 facing the second mounting flange 12. Strain gauges 14 are attached to both the first patch surface 131 and the second patch surface 132. This arrangement causes the strain gauges 14 attached to the first patch surface 131 and the second patch surface 132 to form a Wheatstone bridge in the second dimension. When the elastomer 13 is subjected to a force in the second dimension (the Y-axis direction in the Cartesian coordinate system), the strain gauges 14 attached to the first patch surface 131 and the second patch surface 132 will generate electrical signals, thereby enabling the acquisition of detection values. This achieves torque detection of the elastomer 13 in the Y-axis direction.

[0038] The two-dimensional force sensor 1 provided in this embodiment of the present invention achieves force detection in the first dimension by attaching strain gauges 14 inside the structural hole 130; and achieves force detection in the second dimension by respectively setting strain gauges 14 on the first attachment surface 131 and the second attachment surface 132. In this way, it realizes the detection of force in two dimensions.

[0039] like Figure 1 and Figure 2 As shown, in some embodiments, the elastomer 13 is further provided with a wiring groove 133 communicating with the structural hole 130, and the wiring groove 133 extends to the first patch surface 131 and the second patch surface 132. In this way, the wires electrically connected to each strain gauge 14 can be disposed within the wiring groove 133. That is, the wires electrically connected to the strain gauges 14 on the first patch surface 131 and the second patch surface 132, as well as the wires electrically connected to the strain gauges 14 within the structural hole 130, can be arranged within the wiring groove 133, thereby allowing the wires to be hidden by the wiring groove 133 and not exposed. This not only protects the wires from damage but also improves the simplicity and aesthetics of the overall structure.

[0040] like Figure 1As shown, in some embodiments, the first connecting structure 111 and the second connecting structure 122 are located at opposite ends of the elastic body 13. This arrangement, while ensuring that both the first mounting flange 11 and the second mounting flange 12 can be reliably fixed to the elastic body 13, also allows for a larger distance between the first connecting structure 111 and the second connecting structure 122, thus forming a longer lever arm. This makes the elastic body 13 more prone to deformation under stress, resulting in more sensitive detection performance.

[0041] like Figure 2 As shown, in some embodiments, both the first connecting structure 111 and the second connecting structure 122 are connecting screw holes, and fastening bolts 15 pass through each connecting screw hole. With this arrangement, the first mounting flange 11 and the second mounting flange 12 can be fixed to the elastic body 13 respectively through the threaded connection between the connecting screw holes and the fastening bolts 15. The overall structure of the first connecting structure 111 and the second connecting structure 122 is relatively simple, and the fixing reliability is good, which can reliably meet the fixing requirements of the first mounting flange 11 and the second mounting flange 12.

[0042] like Figure 1 As shown, in some embodiments, a first deformation gap 16 is formed between the first mounting flange 11 and the elastic body 13 at an interval; and / or, a second deformation gap 17 is formed between the second mounting flange 12 and the elastic body 13 at an interval. Specifically, the first deformation gap 16 can be formed at intervals between the first mounting flange 11 and the elastic body 13, except at the connection point where they remain in contact. The presence of the first deformation gap 16 allows the first mounting flange 11 to provide deformation space after being subjected to force, thereby making it easier for the force to be transmitted to the elastic body 13 and detected. Alternatively, the second deformation gap 17 can be formed at intervals between the second mounting flange 12 and the elastic body 13, except at the connection point where they remain in contact. The presence of the second deformation gap 17 allows the second mounting flange 12 to provide deformation space after being subjected to force, thereby making it easier for the force to be transmitted to the elastic body 13 and detected. Of course, the detection performance of the two-dimensional force sensor 1 can also be improved by simultaneously forming the first deformation gap 16 and the second deformation gap 17 through the above-mentioned interval setting method.

[0043] Specifically, a first deformation gap 16 can be formed by providing a raised structure at the connection point between the first mounting flange 11 and / or the elastomer 13. A second deformation gap 17 can be formed by providing a raised structure at the connection point between the second mounting flange 12 and / or the elastomer 13. The specific arrangement can be selected according to actual design requirements and is not limited here.

[0044] like Figure 1 and Figure 2As shown, in some embodiments, the two-dimensional force sensor 1 further includes a cable 10, a pad 18, and a fixing block 19. One end of the cable 10 is electrically connected to each strain gauge 14, and the other end of the cable 10 is connected to an external detection device. This allows the cable 10 to transmit the electrical signals generated by the strain gauges 14 to the external detection device for processing, ultimately obtaining the measured values. The pad 18 presses against the cable 10, and the fixing block 19 presses against the pad 18, and is connected to the second mounting flange 12 via fasteners 191 to fix the cable 10 and the pad 18. This arrangement, through the cooperation of the fixing block 19 and the fasteners 191, generates a fixing force that presses the pad 18 and the cable 10 together, preventing the cable 10 from loosening and improving the reliability of the electrical signal transmission. The pad 18 can be a flexible component, capable of elastic deformation under the pressure of the fixing block 19. This not only improves the stability of fixing the cable 10 but also prevents the fixing block 19 from directly pressing the cable 10 and causing damage, thus enhancing the safety of the cable 10 in use.

[0045] Specifically, the two-dimensional force sensor 1 provided in this embodiment detects the pressure generated by the seat belt at the iliac crest of the pelvis. The detection principle is that this force is measured as Fx and is not affected by the position of the seat belt on the iliac crest. Channel My is designed to indicate the position of the seat belt on the iliac crest. If the center of pressure of the seat belt is located on the neutral axis (center line of the force-bearing surface) of the two-dimensional force sensor 1, the output reading is zero; if the seat belt is above the neutral axis, a positive bending moment reading will be generated; if the seat belt is below the neutral axis, a negative bending moment output will be generated. The calibration data of the two-dimensional force sensor 1 is positive when the sensor is under pressure from the front. Thus, by analyzing the data obtained by the two-dimensional force sensor 1, the magnitude and direction of the force in actual collision tests can be determined, thereby providing data support for vehicle structural protection design and side impact safety system development.

[0046] In the above, "Fx" refers to the force on the sensor in the X direction in the reference Cartesian coordinate system, while "My" refers to the torque on the sensor in the Y direction.

[0047] This embodiment of the invention also provides a crash test dummy, including a dummy body and a two-dimensional force sensor 1 as described in any of the above embodiments. The two-dimensional force sensor 1 is installed at the connection between the iliac bone and the femoral head in the dummy body. Since this crash test dummy uses the aforementioned two-dimensional force sensor 1, it at least has the effects of the aforementioned two-dimensional force sensor 1, which will not be elaborated further here. The overall shape of the two-dimensional force sensor 1 matches the installation space between the iliac bone and the femoral head, thus facilitating installation and enabling more accurate detection of the force between the iliac bone and the femoral head. This improves the accuracy of crash test data using the crash test dummy and provides more accurate data for vehicle safety research and development.

[0048] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A two-dimensional force sensor, installed at the junction of the iliac crest and femoral head of a collision dummy, characterized in that, include: First mounting flange; It cooperates with the femoral head to at least transmit the force to the femoral head; A second mounting flange is used to fix it to the iliac bone, and the second mounting flange is provided with a mounting structure that connects to the iliac bone. An elastomer is used to receive the force transmitted by the first mounting flange and to deform. The first mounting flange is connected to one side of the elastomer through a first connecting structure, and the second mounting flange is connected to the opposite side of the elastomer through a second connecting structure. The projections of the first connecting structure and the second connecting structure in a first direction do not overlap at least partially. A strain gauge is attached to the elastic body and is used to detect the deformation of the elastic body. The first mounting flange is provided with a groove that mates with the femoral head, and the shape of the groove matches the shape of the femoral head.

2. The two-dimensional force sensor as described in claim 1, characterized in that, The groove is recessed towards the interior of the first mounting flange, and the outline of the groove is projected in the first direction as a rugby ball shape.

3. The two-dimensional force sensor as described in claim 1, characterized in that, The elastic body has structural holes, and the strain gauges are attached inside the structural holes; The axis of the structural hole is perpendicular to the first direction.

4. The two-dimensional force sensor as described in claim 3, characterized in that, The elastomer has a first patch surface facing the first mounting flange and a second patch surface facing the second mounting flange, and the strain gauge is attached to both the first patch surface and the second patch surface.

5. The two-dimensional force sensor as described in claim 4, characterized in that, The elastomer is further provided with a wiring groove that communicates with the structural hole, and the wiring groove extends to the first patch surface and the second patch surface; wherein the wires that are electrically connected to each strain gauge are disposed in the wiring groove.

6. The two-dimensional force sensor as described in claim 1, characterized in that, The first connecting structure and the second connecting structure are located at opposite ends of the elastic body.

7. The two-dimensional force sensor as described in claim 1, characterized in that, Both the first and second connecting structures have connecting screw holes, and fastening bolts are inserted into each of the connecting screw holes.

8. The two-dimensional force sensor according to any one of claims 1 to 7, characterized in that, A first deformation gap is formed between the first mounting flange and the elastic body; and / or, a second deformation gap is formed between the second mounting flange and the elastic body.

9. The two-dimensional force sensor according to any one of claims 1 to 7, characterized in that, The two-dimensional force sensor also includes: The cable has one end electrically connected to each of the strain gauges and the other end connected to an external testing device. A pad is pressed against the cable; A fixing block is pressed against the pad and connected to the second mounting flange by fasteners to secure the cable and the pad.

10. A collision dummy, characterized in that, The device includes a prosthesis and a two-dimensional force sensor as described in any one of claims 1 to 9, the two-dimensional force sensor being mounted in the prosthesis at the junction of the iliac bone and the femoral head.

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