Flexible strain sensor for sensing muscle deformation

Abstract

According to the flexible strain sensor for sensing the muscle deformation, a first hand-pinching sheet and a second hand-pinching sheet are attached to the two ends of the upper surface of a flexible substrate respectively, a conductive layer is attached to the portion, located between the first hand-pinching sheet and the second hand-pinching sheet, of the upper surface of the flexible substrate, and one end of the conductive layer is connected with one end of a positive electrode; the other end of the positive electrode is clamped between the flexible substrate and the first hand-pinching sheet and is welded with one end of a positive wire penetrating through the first hand-pinching sheet, the other end of the conductive layer is connected with one end of the negative electrode, and the other end of the negative electrode is clamped between the flexible substrate and the first hand-pinching sheet and is welded with one end of a negative wire penetrating through the first hand-pinching sheet; the lower surface of the flexible substrate is pasted with a lower-layer protection sheet, the lower-layer protection sheet covers the lower surface of the flexible substrate, the upper-layer protection sheet is pasted on the upper surfaces of the first hand-pinching sheet, the conductive layer and the second hand-pinching sheet, the upper-layer protection sheet covers the upper surfaces of the first hand-pinching sheet, the conductive layer and the second hand-pinching sheet, and the upper-layer protection sheet and the lower-layer protection sheet are bonded.

Description

Technical Field

[0001] The utility model relates to the technical field of sensors, in particular to a flexible strain sensor for muscle deformation perception. Background Technique

[0002] With the rapid development of flexible electronic devices, the demand for efficient and accurate strain detection is increasing day by day. As the front end of strain detection - flexible strain sensors, they are the key parts of the entire electronic device. Flexible strain sensors are an emerging sensor technology, which are sensor components made of flexible materials with strain sensing functions. They have excellent flexibility and deformability, can measure the shape and surface strain of objects, and are widely used in many fields such as healthcare, wearable devices, and robotics.

[0003] At present, although various flexible strain sensors have been designed and studied, the current flexible strain sensors are not convenient to install, and there is no structural design for protecting the flexible strain sensors. Therefore, this application designs a flexible strain sensor for muscle deformation perception that is easy to install and has a protective structure. Content of the Utility Model

[0004] The utility model aims at the problems and deficiencies existing in the prior art, and provides a flexible strain sensor for muscle deformation perception.

[0005] The utility model solves the above technical problems through the following technical solutions:

[0006] The utility model provides a flexible strain sensor for muscle deformation perception, which is characterized in that it includes a flexible substrate, and a first hand-held piece and a second hand-held piece are respectively attached to both ends of the upper surface of the flexible substrate. A conductive layer is attached to the upper surface of the flexible substrate and located between the first hand-held piece and the second hand-held piece. One end of the conductive layer is connected to one end of the positive electrode. The other end of the positive electrode is clamped between the flexible substrate and the first hand-held piece and welded to one end of the positive wire passing through the first hand-held piece. The other end of the conductive layer is connected to one end of the negative electrode. The other end of the negative electrode is clamped between the flexible substrate and the first hand-held piece and welded to one end of the negative wire passing through the first hand-held piece.

[0007] A lower protective sheet is pasted on the lower surface of the flexible substrate, and the lower protective sheet covers the lower surface of the flexible substrate. An upper protective sheet is pasted on the upper surfaces of the first hand-held piece, the conductive layer and the second hand-held piece, and the upper protective sheet covers the upper surfaces of the first hand-held piece, the conductive layer and the second hand-held piece. The upper protective sheet and the lower protective sheet are bonded to each other.

[0008] The utility model designs a flexible strain sensor for muscle deformation perception. Through the design of the first hand-squeezing piece and the second hand-squeezing piece, it is convenient for users to hold and install. Through the design of the upper protective piece and the lower protective piece, the protection of the flexible strain sensor is realized. The structure of the utility model is simple and convenient to wear. Description of the Drawings

[0009] Figure 1 It is a schematic structural diagram of a flexible strain sensor for muscle deformation perception according to a preferred embodiment of the utility model. Detailed Embodiment

[0010] To make the objectives, technical solutions, and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the utility model without creative efforts shall fall within the protection scope of the utility model.

[0011] As Figure 1 shown, this embodiment provides a flexible strain sensor for muscle deformation perception, including a flexible substrate 1. The flexible substrate 1 is a long strip-shaped, hydrogel flexible substrate. Square first hand-squeezing pieces 2 and square second hand-squeezing pieces 3 are respectively attached to both ends of the upper surface of the flexible substrate 1. A conductive layer 4 is attached to the upper surface of the flexible substrate 1 and between the first hand-squeezing piece 2 and the second hand-squeezing piece 3. The conductive layer 4 is a graphene conductive layer. One end of the conductive layer 4 is connected to one end of a positive electrode 5. The other end of the positive electrode 5 is clamped between the flexible substrate 1 and the first hand-squeezing piece 2 and is welded to one end of a positive wire 6 passing through the first hand-squeezing piece 2. The other end of the conductive layer 4 is connected to one end of a negative electrode 7. The other end of the negative electrode 7 is clamped between the flexible substrate 1 and the first hand-squeezing piece 2 and is welded to one end of a negative wire 8 passing through the first hand-squeezing piece 2.

[0012] Moreover, a lower protective piece 9 is adhered to the lower surface of the flexible substrate 1, and the lower protective piece 9 covers the lower surface of the flexible substrate 1. The size of the lower protective piece 9 is larger than that of the flexible substrate 1. An upper protective piece 10 is adhered to the upper surfaces of the first hand-squeezing piece 2, the conductive layer 4, and the second hand-squeezing piece 3. The upper protective piece 10 covers the upper surfaces of the first hand-squeezing piece 2, the conductive layer 4, and the second hand-squeezing piece 3. The size of the upper protective piece 10 is larger than that of the flexible substrate 1. The upper protective piece 10 and the lower protective piece 9 are bonded to each other.

[0013] During use, remove the upper protective sheet 10 and the lower protective sheet 9, pinch the first pinch piece 2 and the second pinch piece 3 by hand, and attach the flexible substrate 1 to the part of the human body to be detected (such as the human neck), so that the flexible strain sensor is attached to the part of the human body to be detected, and is used to sense the deformation signal caused by the stretching of human muscles.

[0014] In this embodiment, the flexible strain sensor is a flexible electronic component constructed with hydrogel as the flexible substrate and graphene as the conductive material, that is, it combines the high water permeability, good biocompatibility of hydrogel, and the flexibility and wearability of flexible electronics. This combination opens up new possibilities for various applications such as medical detection, smart wearable devices, flexible sensors, and artificial skin, and has the following characteristics: ① High flexibility and stretchability: Due to its high water content and three-dimensional network structure, hydrogel has excellent flexibility and elasticity; this enables hydrogel-based electronic components to withstand large mechanical deformations such as bending, stretching, and twisting while maintaining functionality, making it very suitable for making wearable devices and flexible electronic products. ② Good biocompatibility: Hydrogel is usually made of biocompatible materials such as natural polymers (gelatin, alginate) or synthetic polymers (polyvinyl alcohol, polyacrylic acid); this good biocompatibility makes hydrogel-based flexible electronic components particularly suitable for medical applications that directly contact the skin or are implanted into the human body. ③ Excellent water conductivity: The high water content and unique network structure of hydrogel promote the effective transmission of water and dissolved substances; this property is of great significance for the development of new electronic components such as humidity sensors and ion conductive devices. ④ Self-healing ability: Hydrogel can self-heal through intermolecular interactions after physical damage, improving the durability and reliability of electronic components based on these materials. ⑤ Transparency: Many hydrogel materials have good optical transparency and are suitable for optoelectronic devices that require transparent or semi-transparent substrates, such as flexible displays and optical sensors. ⑥ Environmentally friendly: Hydrogel materials are usually biodegradable and have less impact on the environment compared to electronic components based on traditional plastics or silicon-based materials; select appropriate hydrogel materials as the substrate, considering their biocompatibility, mechanical strength, and chemical stability; commonly used ones are polyvinyl alcohol (PVA), polyacrylamide (PAM), etc.

[0015] Although the specific implementation manners of the present invention have been described above, those skilled in the art should understand that these are only examples, and the protection scope of the present invention is defined by the appended claims. Without departing from the principles and essence of the present invention, those skilled in the art can make various changes or modifications to these implementation manners, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A flexible strain sensor for muscle deformation perception, characterized in that, It includes a flexible substrate, with a first hand-held piece and a second hand-held piece respectively attached to both ends of the upper surface of the flexible substrate. A conductive layer is attached to the upper surface of the flexible substrate and located between the first hand-held piece and the second hand-held piece. One end of the conductive layer is connected to one end of the positive electrode. The other end of the positive electrode is clamped between the flexible substrate and the first hand-held piece and is welded to one end of the positive wire passing through the first hand-held piece. The other end of the conductive layer is connected to one end of the negative electrode. The other end of the negative electrode is clamped between the flexible substrate and the first hand-held piece and is welded to one end of the negative wire passing through the first hand-held piece; A lower protective sheet is pasted on the lower surface of the flexible substrate, and the lower protective sheet covers the lower surface of the flexible substrate. An upper protective sheet is pasted on the upper surfaces of the first hand-held piece, the conductive layer and the second hand-held piece, and the upper protective sheet covers the upper surfaces of the first hand-held piece, the conductive layer and the second hand-held piece. The upper protective sheet and the lower protective sheet are bonded to each other.

2. The flexible strain sensor for muscle deformation perception according to claim 1, characterized in that, The flexible substrate is a hydrogel flexible substrate.

3. The flexible strain sensor for muscle deformation perception according to claim 1, wherein The conductive layer is a graphene conductive layer.

4. The flexible strain sensor for muscle deformation perception according to claim 1, wherein The flexible substrate is strip-shaped.

5. The flexible strain sensor for muscle deformation perception according to claim 1, characterized in that, Both the first hand-held piece and the second hand-held piece are square.

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