A stretch sensor

Abstract

The utility model discloses a kind of stretch sensors, it is related to stretch sensor technical field, including stretch sensor component, including stretch sensor, the side of stretch sensor is provided with stretch sensor buffer zone, sealing reinforcement component, setting in the outside of stretch sensor component.The utility model is through the collaborative design of stretch sensor component and sealing reinforcement component, effectively solve the defect that flexible stretch sensor structure stability is poor, impact resistance stretch performance is insufficient, on one hand, abandon single reinforcing material, adopt multiple sealing reinforced composite structure, improve stretch threshold, when encountering sudden external force, stress is dispersed through multilayer structure cooperation, avoid local stress concentration, prevent internal conductive path fracture and flexible substrate tear;On the other hand, buffer protection structure is additionally arranged in key stress area, reduce the risk of structural damage caused by accidental collision, instantaneous pull, eliminate secondary problems such as short circuit.

Description

Technical Field

[0001] This utility model relates to the field of tensile sensor technology, and in particular to a tensile sensor. Background Technology

[0002] In wearable devices, flexible electronics, intelligent robots, medical rehabilitation equipment, and other applications, tensile sensors are often used to control the adaptability of the tensile range, measurement accuracy, flexibility, and stability under repeated stretching. This is to prevent sensor breakage due to insufficient tensile limit, poor flexibility that prevents it from fitting curved surfaces, or signal drift and increased measurement error after repeated stretching, which would affect the accuracy of the detection data, equipment compatibility, long-term reliability, and the scalability of the application scenarios.

[0003] Existing flexible tensile sensors have significant deficiencies in structural stability and impact tensile resistance. During tensile testing, the choice of reinforcement materials is relatively limited, often relying on single elastomers or fiber materials for structural reinforcement. The lack of composite reinforcement designs results in generally low tensile thresholds, making them unable to withstand sudden, excessive external forces. When encountering unexpected collisions or sudden stretching, single reinforcement materials cannot effectively disperse stress, leading to localized stress concentrations. This can cause structural damage such as broken internal conductive paths and torn flexible substrates, directly resulting in signal interruption and data acquisition failure. Furthermore, structural damage can lead to secondary problems like short circuits. Simultaneously, this design significantly shortens the sensor's lifespan in motion monitoring, flexible robotics, and other scenarios requiring frequent stretching or exposure to sudden forces. Frequent replacements are necessary to ensure system operation, increasing maintenance costs and reducing overall application reliability. Utility Model Content

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0005] In view of the problems existing in the above and / or existing tensile sensors, this utility model is proposed.

[0006] Therefore, the problem that this utility model aims to solve is that the tensile sensor has relatively poor fastening properties and is prone to breakage under sudden strong external force.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a tensile sensor, comprising: a tensile sensor assembly including a tensile sensor, wherein a tensile sensor buffer strip is provided on one side of the tensile sensor; and a sealing and reinforcing assembly disposed on the outside of the tensile sensor assembly, including a flexible encapsulation layer fixed to the top of the tensile sensor, and a reinforcing member fixed to the bottom of the tensile sensor.

[0008] In a preferred embodiment of the tensile sensor described in this utility model, a load-bearing reinforcement layer is provided at the bottom of the tensile sensor, and the load-bearing reinforcement layer is specifically a reinforced polyurethane elastomer material.

[0009] In a preferred embodiment of the tensile sensor described in this utility model, an adhesive sealing layer is provided at the bottom of the load-bearing reinforcing layer, specifically a modified silane sealant material.

[0010] In a preferred embodiment of the tensile sensor described in this utility model, an interface reinforcement layer is fixed at the bottom of the adhesive sealing layer, and the interface reinforcement layer is specifically a silane coupling agent modified nano-silica sol material.

[0011] In a preferred embodiment of the tensile sensor described in this utility model, a flexible encapsulation layer is fixed to the top of the tensile sensor, and the flexible encapsulation layer is specifically a thermoplastic vulcanized rubber material.

[0012] In a preferred embodiment of the tensile sensor described in this utility model, the reinforcing component includes a positioning block fixed to the bottom of the tensile sensor, and a dovetail groove is provided on one side of the positioning block.

[0013] In a preferred embodiment of the tensile sensor described in this utility model, a plugging protrusion is provided on one side of the positioning block, and a dovetail block that mates with the dovetail groove is fixed on the surface of the plugging protrusion.

[0014] In a preferred embodiment of the tensile sensor described in this utility model, a connecting rod is fixed to one side of the insertion protrusion, and an adhesive reinforcement seat is provided at the bottom of the connecting rod.

[0015] In a preferred embodiment of the tensile sensor described in this utility model, a reinforcing hook seat is fixed on one side of the adhesive reinforcing seat, and a snap-fit ​​groove is provided on the top of the reinforcing hook seat.

[0016] The beneficial effects of this utility model are as follows: Through the coordinated design of the tensile sensor component and the sealing and reinforcement component, the defects of poor structural stability and insufficient impact tensile performance of flexible tensile sensors are effectively solved. On the one hand, it abandons the single reinforcement material and adopts a composite structure with multiple sealing and reinforcement to improve the tensile threshold. When encountering sudden external force, the stress is dispersed through the multi-layer structure to avoid local stress concentration and prevent the internal conductive path from breaking and the flexible substrate from tearing. On the other hand, a buffer protection structure is added to the key stress area to reduce the risk of structural damage caused by accidental collision and instantaneous traction, and to eliminate secondary problems such as short circuits. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them: Figure 1 This is a structural diagram of a tension sensor.

[0018] Figure 2 This is an exploded view of the tension sensor.

[0019] Figure 3 Local structure of the reinforcement for the tension sensor Figure 1 .

[0020] Figure 4 Local structure of the reinforcement for the tension sensor Figure 2 .

[0021] Figure 5 Another perspective view of the reinforcement components for the stretch sensor.

[0022] In the diagram: 1. Tensile sensor assembly; 11. Tensile sensor; 12. Tensile sensor buffer strip; 2. Sealing and reinforcement assembly; 21. Interface reinforcement layer; 22. Adhesive sealing layer; 23. Load-bearing reinforcement layer; 24. Flexible encapsulation layer; 25. Reinforcement component; 251. Adhesive reinforcement seat; 252. Snap-fit ​​groove; 253. Reinforcement hook seat; 254. Connecting rod; 255. Insertion protrusion; 256. Dovetail block; 257. Positioning block; 258. Dovetail groove. Detailed Implementation

[0023] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0024] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0025] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0026] Example 1, referring to Figure 1 and Figure 2 This is the first embodiment of the present invention. This embodiment provides a tensile sensor, which includes a tensile sensor assembly 1 and a sealing and reinforcing assembly 2.

[0027] By coordinating the design of the tensile sensor component 1 and the sealing and reinforcement component 2, the defects of poor structural stability and insufficient impact tensile performance of flexible tensile sensors are effectively solved. On the one hand, the single reinforcement material is abandoned and a composite structure with multiple sealing and reinforcement is adopted to improve the tensile threshold. When encountering sudden external force, the stress is dispersed through the multi-layer structure to avoid local stress concentration and prevent the internal conductive path from breaking and the flexible substrate from tearing. On the other hand, a buffer protection structure is added to the key stress area to reduce the risk of structural damage caused by accidental collisions and instantaneous tension, and to eliminate secondary problems such as short circuits.

[0028] Specifically, the tension sensor assembly 1 includes a tension sensor 11, and a tension sensor buffer strip 12 is provided on one side of the tension sensor 11.

[0029] Specifically, the sealing and reinforcing component 2 is disposed on the outside of the tensile sensor component 1, including a flexible encapsulation layer 24 fixed to the top of the tensile sensor 11, and a reinforcing component 25 fixed to the bottom of the tensile sensor 11.

[0030] Example 2, refer to Figures 2-5 This is the second embodiment of the present invention. Based on the previous embodiment, this embodiment focuses on optimizing the structural strength, interlayer bonding stability and overall reinforcement effect of the tensile sensor. The specific structure is described below.

[0031] Specifically, the bottom of the tensile sensor 11 is provided with a load-bearing reinforcement layer 23, which is specifically made of reinforced polyurethane elastomer material.

[0032] The load-bearing reinforcement layer 23 is attached to the bottom of the tensile sensor 11. As the core load-bearing and buffer structure, it is used to disperse the tensile and impact forces borne by the tensile sensor 11 during operation, and to prevent damage to the sensor body due to localized force concentration. The reinforced polyurethane elastomer material is selected, which has both excellent elastic recovery and mechanical strength. It can not only meet the tensile deformation requirements of the sensor, but also extend the service life of the sensor through the wear resistance and aging resistance of the material itself. At the same time, its flexibility can avoid interfering with the detection accuracy of the sensor.

[0033] Specifically, an adhesive sealing layer 22 is provided at the bottom of the load-bearing reinforcing layer 23, and the adhesive sealing layer 22 is specifically a modified silane sealant material.

[0034] The bonding and sealing layer 22 is located between the load-bearing reinforcement layer 23 and the interface reinforcement layer 21, and performs a dual function: on the one hand, it uses the strong bonding properties of the modified silane sealant to firmly connect the load-bearing reinforcement layer 23 and the interface reinforcement layer 21, ensuring no gaps between the layers and avoiding delamination during the stretching process; on the other hand, it uses its excellent sealing performance to isolate external moisture, dust and other impurities from entering the sensor, protecting the core detection element. At the same time, the high and low temperature resistance of the modified silane material can adapt to different working environments and improve the environmental adaptability of the sensor.

[0035] Specifically, an interface reinforcement layer 21 is fixed to the bottom of the adhesive sealing layer 22, and the interface reinforcement layer 21 is specifically a silane coupling agent modified nano-silica sol material.

[0036] The interface reinforcement layer 21 serves as a transition layer between the adhesive sealing layer 22 and the mounting surface. Its core function is to enhance the interfacial bonding force of the overall structure. The silane coupling agent modified nano-silica sol material has a nano-scale particle size distribution, which can uniformly penetrate into the micro-gap between the adhesive sealing layer 22 and the mounting surface to form a dense bonding interface. This significantly enhances the interlayer adhesion and prevents the structure from loosening due to interface slippage during stretching. At the same time, the high strength characteristics of the nanomaterials can further enhance the load-bearing capacity of the overall structure.

[0037] Specifically, a flexible encapsulation layer 24 is fixed to the top of the stretch sensor 11, and the flexible encapsulation layer 24 is specifically a thermoplastic vulcanized rubber material.

[0038] The flexible encapsulation layer 24 wraps around the top and sides of the tensile sensor 11, forming all-round protection. The thermoplastic vulcanized rubber material combines the flexibility of rubber with the processing stability of plastic. It can adapt to the deformation requirements of the tensile sensor 11 without affecting its detection sensitivity. At the same time, the material itself has wear resistance, tear resistance and chemical corrosion resistance properties, which can resist external friction, collision and erosion from harsh environments, protect the internal circuit and detection elements of the sensor and extend its service life.

[0039] Specifically, the reinforcement component 25 includes a positioning block 257 fixed to the bottom of the tension sensor 11, and a dovetail groove 258 is provided on one side of the positioning block 257.

[0040] The reinforcement component 25 is used to enhance the connection stability between the tensile sensor 11 and the external structure. The positioning block 257 is fixed to the bottom of the tensile sensor 11 and fits against the load-bearing reinforcement layer 23, providing an installation reference for the subsequent plug-in structure. The dovetail groove 258 is opened on one side of the positioning block 257 and adopts a wedge-shaped slot structure, which has the characteristics of convenient installation and stable connection. It can form a tight fit with the dovetail block 256 of the plug-in protrusion 255 to prevent the connection part from falling off along the tensile direction.

[0041] Specifically, a plugging protrusion 255 is provided on one side of the positioning block 257, and a dovetail block 256 that mates with the dovetail groove 258 is fixed on the surface of the plugging protrusion 255.

[0042] The insertion protrusion 255 serves as the connecting medium between the positioning block 257 and the connecting rod 254. The dovetail block 256 on its surface is precisely matched with the dovetail groove 258 of the positioning block 257. Through the interlocking action of the wedge structure, the two can be quickly inserted and rigidly fixed. There is no relative displacement after connection, ensuring the stable transmission of tensile force. At the same time, this mating structure is easy to disassemble and maintain, improving the convenience of use.

[0043] Specifically, a connecting rod 254 is fixed to one side of the insertion protrusion 255, and an adhesive reinforcement seat 251 is provided at the bottom of the connecting rod 254.

[0044] The connecting rod 254 is a rigid rod fixed to one side of the insertion protrusion 255. It is used to transmit the tension of the positioning block 257 to the adhesive reinforcement seat 251, so as to realize the force distribution and avoid excessive local stress. The adhesive reinforcement seat 251 is set at the bottom of the connecting rod 254. It is made of a material with high bonding strength and can be firmly bonded to the mounting surface to form a stable fixed foundation and enhance the tensile strength of the overall structure.

[0045] Specifically, a reinforcing hook seat 253 is fixed on one side of the adhesive reinforcing seat 251, and a snap-fit ​​groove 252 is provided on the top of the reinforcing hook seat 253.

[0046] The reinforcing hook seat 253 is an additional reinforcing structure, fixed to one side of the adhesive reinforcing seat 251, forming a double guarantee with the adhesive fixation; the snap-fit ​​groove 252 on its top can cooperate with external snap-fit ​​components to achieve mechanical hook fixation, further improving the connection stability of the overall structure, preventing the adhesive part from failing under extreme tensile conditions, and ensuring that the tensile sensor 11 always maintains a stable installation state.

[0047] Example 3, referring to Figures 2-5 This is the third embodiment of the present invention, which is based on the first two embodiments.

[0048] When the tensile sensor 11 is installed at the target position, the interface reinforcement layer 21 first contacts the mounting surface. Its silane coupling agent modified nano-silica sol material fills the tiny gaps in the mounting surface through the nanoscale structure, while optimizing the surface activity. This triggers the modified silane sealant of the bonding and sealing layer 22 to spread evenly and bond deeply, forming a strong "interface anchoring" and laying the foundation for subsequent interlayer structure cooperation.

[0049] The adhesive sealing layer 22 is simultaneously bonded and fixed to the load-bearing reinforcement layer 23. The load-bearing reinforcement layer 23, made of reinforced polyurethane elastomer, supports the body of the tensile sensor 11. When the sensor is subjected to tensile force, the tensile sensor buffer strip 12 first absorbs the instantaneous impact force, and the load-bearing reinforcement layer 23 then disperses the continuous tensile stress. The two form a "buffering-load-bearing" linkage to prevent the core components of the tensile sensor 11 from being damaged due to excessive local stress. At the same time, the flexible encapsulation layer 24, made of thermoplastic vulcanized rubber, wraps around the top of the tensile sensor 11, forming a "double seal" with the adhesive sealing layer 22 to block the intrusion of moisture and dust, achieving all-round protection. Moreover, the flexible characteristics of the flexible encapsulation layer 24 and the load-bearing reinforcement layer 23 complement each other, which does not restrict the tensile deformation of the sensor from affecting the detection accuracy, and also ensures the structural integrity.

[0050] When installing the reinforcement component 25, the positioning block 257 fixed to the bottom of the tension sensor 11 is precisely engaged with the dovetail block 256 on the surface of the insertion protrusion 255 through the dovetail groove 258, triggering the insertion protrusion 255 to rigidly link with the adhesive reinforcement seat 251 through the connecting rod 254. The adhesive reinforcement seat 251 relies on its own adhesive properties to fit tightly with the mounting surface, forming a double fixation of "engagement + adhesion". Subsequently, the reinforcement hook seat 253 engages with the external mounting structure through the engagement groove 252, constructing a three-point fixation structure of "positioning block 257 + adhesive reinforcement seat 251 + reinforcement hook seat 253", dispersing the pressure of the tensile force on a single fixation point.

[0051] When the tensile sensor 11 is working, the tensile force triggers the synergistic effect of each structure: the load-bearing reinforcement layer 23 further disperses the tensile stress, the flexible encapsulation layer 24 resists frictional damage during the tensile process with its excellent wear resistance, and the adhesive sealing layer 22 keeps the interlayer seal intact; at the same time, the reinforcement member 25, through the anti-detachment cooperation between the dovetail groove 258 and the dovetail block 256, prevents the sensor from shifting laterally or twisting, and protects the interlayer structures such as the interface reinforcement layer 21 and the adhesive sealing layer 22 from being pulled and peeled off. Its "rigid fixation" and the "flexible load-bearing" of each layer structure form a complementary gain, which not only ensures the accuracy of the detection signal of the tensile sensor 11, but also greatly improves the tensile stability and service life of the structure.

[0052] The lead wire of the tensile sensor 11 is made of flexible wire, which matches the tensile deformation characteristics of the tensile sensor 11 and avoids the lead wire from breaking due to tensile stress. The lead wire is led out by a waterproof connector, and the waterproof connector and the flexible encapsulation layer 24 are integrated and sealed together, forming a linkage protection with the bottom seal of the adhesive sealing layer 22, which prevents the sealing failure at the lead wire and further ensures the overall sealing performance of the sensor, ensuring its long-term stable operation in complex environments.

[0053] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A tensile sensor, characterized in that: include, The tensile sensor assembly (1) includes a tensile sensor (11), a tensile sensor buffer strip (12) is provided on one side of the tensile sensor (11), and; A sealing and reinforcing component (2) is disposed on the outside of the tensile sensor assembly (1) and includes a flexible encapsulation layer (24) fixed to the top of the tensile sensor (11) and a reinforcing component (25) fixed to the bottom of the tensile sensor (11).

2. The tensile sensor as described in claim 1, characterized in that: The bottom of the tensile sensor (11) is provided with a load-bearing reinforcement layer (23), which is specifically a reinforced polyurethane elastomer material.

3. The tensile sensor as described in claim 2, characterized in that: The bottom of the load-bearing reinforcing layer (23) is provided with an adhesive sealing layer (22), which is specifically a modified silane sealant material.

4. The tensile sensor as described in claim 3, characterized in that: The bottom of the adhesive sealing layer (22) is fixed with an interface reinforcement layer (21), which is specifically a silane coupling agent modified nano-silica sol material.

5. The tensile sensor as described in claim 4, characterized in that: The top of the tensile sensor (11) is fixed with a flexible encapsulation layer (24), which is specifically a thermoplastic vulcanized rubber material.

6. The tensile sensor as described in claim 5, characterized in that: The reinforcement component (25) includes a positioning block (257) fixed to the bottom of the tension sensor (11), and a dovetail groove (258) is provided on one side of the positioning block (257).

7. The tensile sensor as described in claim 6, characterized in that: The positioning block (257) has a plug-in protrusion (255) on one side, and a dovetail block (256) that mates with the dovetail groove (258) is fixed on the surface of the plug-in protrusion (255).

8. The tensile sensor as described in claim 7, characterized in that: A connecting rod (254) is fixed to one side of the insertion protrusion (255), and an adhesive reinforcement seat (251) is provided at the bottom of the connecting rod (254).

9. The tensile sensor as described in claim 8, characterized in that: One side of the adhesive reinforcement seat (251) is fixed with a reinforcement hook seat (253), and the top of the reinforcement hook seat (253) is provided with a snap-fit ​​groove (252).

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