Intelligent sensing double-layer sock shoe and method thereof for monitoring foot action of wearer

Abstract

The invention relates to an intelligent sensing double-layer sock shoe and a method thereof for monitoring foot actions of a wearer, and belongs to the technical field of intelligent sensing fabrics. An intelligent sensing double-layer sock shoe based on a friction nanometer generator comprises an inner sock unit, an outer sock unit, a sole unit and a sensing unit. The inner sock unit supports the sole, the outer sock unit supports the inner sock unit, and the inner sock unit is connected with the outer sock unit; the inner sock unit comprises a first friction layer and a sensing layer, the outer sock unit comprises a second friction layer and a conducting layer, the sensing layer is connected with the sensor unit, the sensing unit comprises a sensor and a sending module, the sensor is arranged on the sensing layer, and the sensor senses foot movement of a wearer and converts the foot movement into foot movement electric signals; the first friction layer is connected with the conductive layer through the connecting unit, the sending module is connected with the connecting unit, and the sensor communicates with the sending module. According to the invention, self power supply can be realized, physiological data such as gait, plantar pressure and exercise intensity of a wearer can be monitored, and the development of a wearable technology is promoted.

Description

Technical Field

[0001] The present invention belongs to the technical field of intelligent sensing fabrics, and specifically relates to an intelligent sensing double-layer sock shoe and a method for monitoring the wearer's foot movements. Background Art

[0002] With the development of Internet technology and intelligent manufacturing technology, smart wearable products have been integrated into people's daily lives and shine in people's sports and health fields. At present, my country's textile industry intelligent manufacturing is in a critical period of coexistence of digitalization, networking and intelligent development. The development of technologies such as intelligent textile design and control, automatic forming of complex components of special fabrics, and intelligent factories has opened up new areas for textile intelligent manufacturing. Traditional smart wearable devices can no longer combine wearing comfort and sensing efficiency well, resulting in products that do not fit the wearer and are relatively bulky; at the same time, because traditional smart wearable devices require a large amount of petrochemical resources, the pollution caused to the environment during the production process is relatively large, which does not conform to the current concept of sustainable development. Therefore, the combination of friction nanogenerators with a wide range of materials, simple structure and strong energy collection capabilities with textiles to produce smart sensing fabrics is considered to be one of the solutions.

[0003] The friction nanogenerator uses the surface charge generated when two different materials come into contact and separate, as well as the electric field that changes over time, to drive the flow of electrons in an external circuit. This power generation technology collects energy from the surrounding environment, collects the weak energy in the surrounding environment, and outputs it in the form of an electrical signal. Combining the friction nanogenerator with textile technology can weave smart fabrics that can collect weak energy from the environment. This fabric is light, easy to combine with practical products, and reflects the relevant energy more accurately.

[0004] In recent years, the development of telemedicine and mobile medicine has led to the rapid development of wearable physiological monitoring equipment. Wearable physiological monitoring equipment has the advantages of less impact on people's daily living habits, large contact area with the wearer, and more detailed wearer's vital signs data. As a supporting technology in the fields of gait research, foot disease diagnosis and sports shoe design, plantar pressure measurement is becoming increasingly important in biomechanical gait research. Compared with ordinary shoes, socks and shoes have improved comfort, breathability and fit with the soles of people's feet. Smart sensing double-layer socks and shoes are divided into outer socks and inner socks. When the outer socks are used as the sensing area, the contact separation space between them and the inner socks is better than that of single-layer socks and shoes. At the same time, using socks and shoes as human foot pressure sensing equipment has a larger contact area with the soles of people's feet, is more comfortable to use, and has more accurate sensing of human foot posture and pressure. Summary of the invention

[0005] The present invention proposes a smart sensing double-layer socks and a method for monitoring the foot movements of the wearer, aiming to partially or completely solve the technical problems of the existing technology for plantar pressure monitoring equipment, such as poor fit between the wearer and the wearer, insufficient comfort, and the need for an external power supply that is too bulky. To achieve the above purpose, the technical solution adopted by the present invention is:

[0006] In the first aspect, a smart sensing double-layer sock shoe based on a friction nanogenerator includes: an inner sock unit, an outer sock unit, a sole unit and a sensing unit; the inner sock unit supports the sole of the foot, the outer sock unit supports the inner sock unit, and the inner sock unit is connected to the outer sock unit; the inner sock unit includes a first friction layer and a sensing layer, the outer sock unit includes a second friction layer and a conductive layer, the sensing layer is connected to the sensor unit, the sensing unit includes a sensor and a sending module, the sensor is arranged on the sensing layer, the sensor senses the wearer's foot movement and converts it into an electrical signal of the foot movement, the first friction layer is connected to the conductive layer through the connecting unit, the sending module is connected to the connecting unit, and the sensor communicates with the sending module.

[0007] Optionally, the raw materials of the sensing layer and the second friction layer include at least one of polyester, nylon, polypropylene, wool and silk, and the first friction layer and the conductive layer include conductive yarn, and the raw material of the conductive yarn includes at least one of silver-plated polyester and silver-plated nylon.

[0008] Optionally, the outer sock unit supports the inner sock unit via a supporting unit, and the supporting unit includes chemical fibers or natural fibers that are non-conductive and have relatively strong dielectric properties.

[0009] Optionally, the sensing layer includes M sensing areas, and the multiple sensing areas correspond one-to-one to multiple pressure areas on the sole of the wearer's foot: N sensors are provided, each sensor is provided in each sensing area, the sensor includes a piezoelectric sensor, M is greater than or equal to N, M is a positive integer greater than or equal to 2, and N is a positive integer.

[0010] In a second aspect, a method for monitoring the foot movement of a wearer using a smart sensing double-layer sock and shoe adopts any one of the smart sensing double-layer sock and shoe based on a friction nanogenerator described in the first aspect, comprising:

[0011] Step S100: obtaining a smart sensing double-layer sock shoe based on a friction nanogenerator;

[0012] Step S100 includes:

[0013] Step S101: weaving double-layer socks and shoes, the double-layer socks and shoes include: an inner sock unit and an outer sock unit; the outer sock unit supports the inner sock unit through a supporting unit, and the inner sock unit is connected to the outer sock unit; the inner sock unit includes a first friction layer and an induction layer, the outer sock unit includes a second friction layer and a conductive layer, and the induction layer includes a plurality of induction areas; based on a double-yarn-mouth feeding method, the double-layer socks and shoes are woven in a method of front single side, back single side and middle tuck loop, the raw materials of the yarns of the front single side and back single side of the inner sock unit are at least one of polyester, nylon, polypropylene, wool and silk, and the induction layer is woven; the middle tuck loop is made of conductive yarn, and the first friction layer is woven; the raw materials of the yarns of the front single side and back single side of the outer sock unit are at least one of polyester, nylon, polypropylene, wool and silk, and the second friction layer is woven; the middle tuck loop is made of conductive yarn, and the conductive layer is woven;

[0014] Step S102: The double-layer socks and shoes are connected to the sole unit, the sensor is set on the sensing layer, the first friction layer is connected to the conductive layer through the connecting unit, the sending module is connected to the connecting unit, and the sensor communicates with the sending module to obtain an intelligent sensing double-layer socks and shoes based on the friction nanogenerator;

[0015] Step S200: Use the smart sensing double-layer socks and shoes to monitor the wearer's foot movement data.

[0016] Optionally, step S200 includes:

[0017] Step S201: In the initial state, the smart sensing double-layer socks and shoes are not charged. Under the external force of the sole of the wearer's foot, the second friction layer of the outer sock unit and the first friction layer of the inner sock unit contact each other. At this time, the smart sensing double-layer socks and shoes are in an electrostatic equilibrium state for the first time.

[0018] Step S202: the inner sock unit and the outer sock unit begin to separate under the action of external force, and the first electrostatic equilibrium state is broken, and a potential difference appears between the contact surfaces of the first friction layer and the second friction layer. At this time, free electrons will move between the first friction layer and the conductive layer, thereby generating a directional moving current in the circuit formed by the first friction layer and the conductive layer; when the inner sock unit and the outer sock unit of the smart sensing double-layer socks are separated to a certain distance, the electrostatic charge generated by the friction between the first friction layer and the conductive layer is balanced again, and the smart sensing double-layer socks are in an electrostatic equilibrium state for the second time; when the sole of the wearer's foot Under the action of external force, when the smart sensing double-layer socks and shoes are acted on again, the distance between the inner sock unit and the outer sock unit decreases, and the electrostatic equilibrium state is broken for the second time. At this time, free electrons will move between the first friction layer and the conductive layer, thereby generating a directional moving current in the circuit formed by the first friction layer and the conductive layer again. When the second friction layer of the outer sock unit and the first friction layer of the inner sock unit contact each other again, the smart sensing double-layer socks and shoes are in an electrostatic equilibrium state for the third time; the sensor transmits the foot movement electrical signal to the sending module, and the sending module sends the foot movement electrical signal to the smart device to monitor the wearer's foot movement data.

[0019] Optionally, the wearer's foot motion data includes at least one of: gait data, plantar pressure data, and exercise intensity data.

[0020] The beneficial effects achieved by the present invention are as follows:

[0021] (1) In the present invention application, the smart sensing double-layer socks and shoes include a multi-layer structure design of an inner sock unit, a support unit, and an outer sock unit. The double-layer structure design is simple and can be produced at low cost. It can provide better support and comfort, reduce the impact and pressure on the sole of the wearer's foot during exercise, and make the inner sock unit and the outer sock unit have better contact and separation space, better air permeability and comfort, and suitable for long-term wear.

[0022] (2) In the present invention, the smart sensing double-layer socks and shoes adopt the principle of friction nanogenerator. Through the gait movement of the wearer's feet, the first friction layer of the inner sock unit and the second friction layer of the outer sock unit can generate electrical energy by friction. The electrical energy can provide power support for the sending module, the transmission module, etc., to achieve self-power supply, without relying on external power supply or traditional batteries, avoiding the environmental pollution problem of waste batteries, reducing the trouble of battery replacement for users, and greatly improving the durability and convenience of the smart sensing double-layer socks and shoes;

[0023] (3) In the present invention application, the sensor arranged on the sensing layer can sense the wearer's foot movement and convert it into a foot movement electrical signal. The sensor can be a piezoelectric sensor, etc. The foot movement electrical signal includes one or more physical parameters such as strain, voltage, current, charge, stress, etc. The foot movement electrical signal obtained by the sensor is transmitted to the sending module, and the sending module sends the foot movement electrical signal to the smart device (such as a smart phone, a smart bracelet, etc.) or a mobile phone application APP, so as to monitor the wearer's gait, plantar pressure, exercise intensity and other physiological data. By analyzing and processing these physiological data, the wearer can be monitored in real time for sports health monitoring, health management, gait analysis and early warning, etc., effectively improving the wearer's experience and promoting the development of smart wearable technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 The schematic diagram of the principle of the smart sensing double-layer socks and shoes based on the friction nanogenerator applied by the present invention is shown;

[0026] Figure 2 The schematic diagram of the structure of the smart sensing double-layer socks and shoes based on the friction nanogenerator applied in the present invention is shown;

[0027] Figure 3 The working principle diagram of the charge balance and current generation of the smart sensing double-layer socks and shoes in one monitoring cycle is shown in the present invention ( Figure 3 (a) is a schematic diagram of the first time the smart sensing double-layer socks and shoes are in electrostatic equilibrium. Figure 3 (b) is a schematic diagram of the current generation of the smart sensor double-layer socks and shoes Figure 1 , Figure 3 (c) is a schematic diagram of the smart sensing double-layer socks and shoes in the electrostatic equilibrium state for the second time. Figure 3 (d) is a schematic diagram of the current generation of the smart sensor double-layer socks Figure 2 ).

[0028] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments; based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0030] In the description of the present invention application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention application. "Including" can at least be understood as the meaning of only including, and the sequence number of the steps does not represent a specific order of precedence. In order to make the purpose, technical solution and advantages of the present invention application clearer, the implementation mode of the present invention application will be further described in detail below in conjunction with the accompanying drawings.

[0031] A smart sensing double-layer sock shoe based on friction nanogenerator

[0032] like Figure 1 , Figure 2 As shown, in the first aspect, a smart sensing double-layer sock shoe based on a friction nanogenerator includes: an inner sock unit 100, an outer sock unit 200, a sole unit 300 and a sensing unit; the inner sock unit 100 supports the sole of the foot, the outer sock unit 200 supports the inner sock unit 100, and the inner sock unit 100 is connected to the outer sock unit 200; the inner sock unit 100 includes a first friction layer 101 and a sensing layer 102, the outer sock unit includes a second friction layer 201 and a conductive layer 202, the sensing layer 102 is connected to the sensing unit, the sensing unit includes a sensor 401 and a sending module, the sensor 401 is arranged on the sensing layer 102, the sensor 401 senses the wearer's foot movement and converts it into a foot movement electrical signal, the first friction layer 101 is connected to the conductive layer 202 through the connecting unit 402, the sending module is connected to the connecting unit 402, and the sensor 401 communicates with the sending module.

[0033] In some embodiments, the smart sensing double-layer socks and shoes include an inner sock unit 100 and an outer sock unit 200. The inner sock unit 100 supports the sole of the foot, and the outer sock unit 200 supports the inner sock unit 100, so that the smart sensing double-layer socks and shoes have a double-layer structure. The double-layer structure is simple in design and can be produced at low cost. It can also provide better support and comfort, reduce the impact and pressure on the sole of the wearer during exercise, and make the inner sock unit 100 and the outer sock unit 200 have better contact separation space, better air permeability and comfort, and are suitable for long-term wear.

[0034] In some embodiments, the smart sensing double-layer socks and shoes adopt the principle of friction nanogenerator. Through the gait movement of the wearer's feet, the first friction layer 101 of the inner sock unit 100 and the second friction layer 201 of the outer sock unit 200 can generate electrical energy by friction. The first friction layer 101 is connected to the conductive layer 202 through the connecting unit 402. The connecting unit 402 can adopt a wire, etc., and a certain amount of alternating current will be output between the first friction layer 101 and the conductive layer 202.

[0035] In some embodiments, based on the principle of friction nanogenerator, the current output between the first friction layer 101 and the conductive layer 202 is alternating current, which can be converted into direct current output through a full-wave rectifier circuit and stored in electrical energy (for example, an energy storage device). The electrical energy stored in the (energy storage device) can provide power support for electronic components inside and outside the socks and shoes (such as a sending module, a transmission module, etc.). Accordingly, the connection unit 402 can be connected to a full-wave rectifier device, the full-wave rectifier device is connected to an energy storage device, and the energy storage device is connected to a sending module to provide electrical energy to the sending module, that is, the sending module is connected to the first friction layer 101 and the conductive layer 202, so that the sending module can continue to work and achieve self-powered power without relying on an external power supply or traditional batteries, thereby avoiding the environmental pollution problem of waste batteries, reducing the trouble of battery replacement for users, and greatly improving the durability and convenience of the smart sensing double-layer socks and shoes.

[0036] In some embodiments, when the inner sock unit 100 contacts the sole of the wearer's foot, the inner sock unit 100 fits the sole of the foot (see FIG. Figure 1 The sensor 401 is disposed on the sensing layer 102 and the sensor 401 is disposed on the upper part of the middle sensing layer 102. When the wearer stands, walks or exercises, as the pressure applied by the sole of the wearer's foot changes, the inner sock unit 100 and the outer sock unit 200 will repeatedly come into contact and separate. The sensor 401 disposed on the sensing layer 102 can sense the wearer's foot movement and convert it into an electrical signal of the foot movement. The sensor 401 can be a piezoelectric sensor, etc. The piezoelectric sensor can measure one or more of the physical parameters such as strain, voltage, current, charge, stress, etc. Correspondingly, the electrical signal of the foot movement includes one or more of the physical parameters such as strain, voltage, current, charge, stress, etc.

[0037] In some embodiments, the sensor 401 communicates with the sending module. The sensor 401 can communicate with the sending module through the transmission module. The transmission module includes a wireless transmission module or a wired transmission module. The sensor 401 transmits the foot movement electrical signal to the sending module, and the sending module sends the foot movement electrical signal to a smart device (such as a smart phone, a smart bracelet, etc.) or a mobile phone application APP, thereby monitoring the wearer's gait, plantar pressure, exercise intensity and other physiological data. By analyzing and processing these physiological data, the wearer can be monitored for sports health, health management, gait analysis and warning in real time, etc., effectively improving the wearer's experience and promoting the development of smart wearable technology.

[0038] In the present invention application, the smart sensing double-layer socks and shoes can provide the wearer with long-term health monitoring data such as human gait and human movement, and then can perform wearer health monitoring, health management and early warning. The wearer of the smart sensing double-layer socks and shoes can obtain their own foot health status through smart devices or mobile phone applications, and can detect foot health problems (such as uneven plantar pressure, abnormal walking posture, etc.) at an early stage, providing the wearer with scientific sports health management data to prevent sports injuries or health problems caused by bad posture.

[0039] Optionally, the raw materials of the sensing layer 102 and the second friction layer 201 include at least one of polyester, nylon, polypropylene, wool, and silk, and the first friction layer 101 and the conductive layer 202 include conductive yarn, and the raw material of the conductive yarn includes at least one of silver-plated polyester and silver-plated nylon.

[0040] In some embodiments, the raw materials of the sensing layer 102 and the second friction layer 201 are selected from at least one of polyester, nylon, polypropylene, wool, and silk. Polyester, nylon, polypropylene, wool, and silk not only provide good comfort, environmental protection, and easy accessibility, but also have a good friction coefficient and wear resistance. They do not add extra weight and are suitable for long-term wear. They do not affect walking comfort and can effectively generate friction during walking. The first friction layer 101 of the inner sock unit 100 and the second friction layer 201 of the outer sock unit 200 can generate friction and convert it into electrical energy, ensuring the continuous generation of friction charges and the collection of electrical energy.

[0041] In some embodiments, the conductive yarn has good electrical conductivity and can efficiently conduct the charge generated by friction to the sensing circuit. The conductive properties of silver-plated polyester and nylon can effectively enhance the frictional electric energy collection capability of the smart sensing double-layer socks and shoes, so that the smart sensing double-layer socks and shoes can quickly convert and provide electrical energy, achieve self-powered, and do not rely on external power supplies or traditional batteries. It can provide power support for electronic components inside and outside the socks and shoes (such as sending modules, transmission modules, etc.).

[0042] Optionally, the outer sock unit 200 supports the inner sock unit 100 via a support unit 400 , and the support unit 400 includes chemical fibers or natural fibers that are non-conductive and have relatively strong dielectric properties.

[0043] In the present application, the support unit 400 is made of non-conductive materials, such as chemical fibers or natural fibers, which can effectively prevent the current from short-circuiting between the inner sock unit and the outer sock unit, thereby ensuring the normal operation of the friction nanogenerator and avoiding electrostatic interference; at the same time, the use of natural fibers or synthetic chemical fibers, especially materials with strong dielectric properties, can provide good support without adding too much weight. The support unit can be woven by chemical fibers or natural fibers, and these materials usually have good air permeability and softness, thereby improving the comfort of the wearer.

[0044] like Figure 2 As shown, optionally, the sensing layer 102 includes M sensing areas 1021, and the multiple sensing areas 1021 correspond one-to-one to multiple pressure areas on the sole of the wearer's foot: N sensors 401 are provided, each sensor is provided in each sensing area, and the sensor 401 includes a piezoelectric sensor, M is greater than or equal to N, M is a positive integer greater than or equal to 2, and N is a positive integer.

[0045] In some embodiments, the sensor 401 includes a piezoelectric sensor, and multiple sensing areas correspond one-to-one to multiple pressure areas on the sole of the wearer's foot. Each sensor 401 is arranged in each sensing area. The piezoelectric sensor can accurately sense the pressure distribution and pressure changes in different parts of the sole of the wearer's foot, and convert them into foot motion electrical signals. The foot motion electrical signals include one or more of the physical parameters such as strain, voltage, current, charge, and stress, and can provide one or more of the physical data such as detailed strain data, voltage data, current data, charge data, stress data, etc. In this way, the sensor 401 can monitor and sense the wearer's gait, sole pressure, exercise intensity and other physiological data in real time.

[0046] In some embodiments, the sensing layer 102 includes M sensing areas, and the M sensing areas correspond precisely to multiple pressure areas on the sole of the wearer's foot. The M sensing areas may correspond to different areas of the sole of the wearer's foot, such as the forefoot, the arch, the heel, etc., illustratively, sensing area 1 10211 (1021), sensing area 2 10212 (1021) and sensing area 3 10213 (1021). The M sensing areas may be used to capture the wearer's gait changes, pressure distribution and other motion information, and may provide the wearer with a personalized smart sensing socks and shoes customization solution based on the sole shape, gait and pressure distribution of different wearers, to avoid the pressure or discomfort caused by long-term wearing, and are particularly suitable for people who need to walk or stand for a long time, such as the elderly, athletes, etc., to improve the wearer's comfort and health.

[0047] In some embodiments, the number of sensors 401 is N, where M is greater than or equal to N. The number of sensors can be reasonably set according to the plantar pressure of different wearers to avoid the number of sensors 401 being redundant, thereby improving the actual availability of subsequent monitoring of physiological data such as the wearer's gait, plantar pressure, and exercise intensity.

[0048] In the present application, by setting a one-to-one correspondence between the sensing area and the pressure area of ​​the wearer's sole in the sensing layer 102, the sensor unit is integrated into the smart sensing double-layer socks and shoes, so that the smart sensing double-layer socks and shoes can not only realize the collection of frictional electric energy, but also can monitor and analyze human gait, human motion data, etc. in real time, and can provide the wearer with a more intelligent, personalized and healthy wearing experience, enhance the comfort and intelligence of the smart sensing double-layer socks and shoes, and provide strong data support for the innovation and development of future smart wearable devices.

[0049] A method for monitoring the wearer's foot movements using intelligent sensing double-layer socks and shoes

[0050] In a second aspect, a method for monitoring the foot movement of a wearer using a smart sensing double-layer sock shoe comprises the following steps:

[0051] Step S100: obtaining a smart sensing double-layer sock shoe based on a friction nanogenerator;

[0052] Specifically, step S100 includes:

[0053] Step S101: weaving double-layer socks and shoes, the double-layer socks and shoes include: an inner sock unit 100 and an outer sock unit 200; the outer sock unit 200 supports the inner sock unit 100 through a supporting unit, and the inner sock unit 100 is connected to the outer sock unit 200; the inner sock unit 100 includes a first friction layer 101 and a sensing layer 102, the outer sock unit includes a second friction layer 201 and a conductive layer 202, and the sensing layer 102 includes multiple sensing areas; based on the double yarn mouth feeding method, the front single side, the back single side and the middle tuck are adopted The double-layer socks and shoes are woven in a manner, the raw materials of the yarns of the front and back sides of the inner sock unit 100 are at least one of polyester, nylon, polypropylene, wool, and silk, and are woven to form the induction layer 102, and the middle tuck is woven with conductive yarn to form the first friction layer 101; the raw materials of the yarns of the front and back sides of the outer sock unit 200 are at least one of polyester, nylon, polypropylene, wool, and silk, and are woven to form the second friction layer 201; the middle tuck is woven with conductive yarn to form the conductive layer 202;

[0054] Step S102: The double-layer socks and shoes are connected to the sole unit 300, the sensor 401 is set on the sensing layer 102, the first friction layer 101 is connected to the conductive layer 202 through the connecting unit 402, the sending module is connected to the connecting unit 402, and the sensor 401 communicates with the sending module to obtain an intelligent sensing double-layer socks and shoes based on friction nanogenerators.

[0055] In some embodiments, the double-layer socks and the sole unit 300 are connected mechanically or chemically to form a stable smart sensing double-layer sock structure. The sole unit 300 can stably support the entire smart sensing double-layer sock to facilitate walking.

[0056] In some embodiments, the first friction layer 101 of the inner sock unit 100 and the second friction layer 201 of the outer sock unit 200 can generate electrical energy by friction, the first friction layer 101 is connected to the connecting unit, the connecting unit 402 is connected to the conductive layer 202, and the connecting unit 402 is connected to the sending module, so that the electrical energy generated by friction can be provided. For example, through the first friction layer 101 of the inner sock unit 100 and the second friction layer 201 of the outer sock unit 200, not only can self-power be achieved, but also the data of the collected foot movement electrical signal can be transmitted to the external smart device.

[0057] In some embodiments, the first friction layer 101 is connected to the conductive layer 202 through the connecting unit 402, the connecting unit 402 is connected to the full-wave rectifier, the full-wave rectifier is connected to the energy storage device, and the energy storage device is connected to the sending module, that is, the first friction layer 101 is connected to the sending module, and the sending module is connected to the conductive layer 202, ensuring the normal operation of the sending module.

[0058] Therefore, in step S100 of the present application, step S101 can be performed on a computer flat knitting machine. By combining friction nanogenerator technology, pressure sensors, weaving technology, etc., smart sensing double-layer socks and shoes based on friction nanogenerators can be obtained. The smart sensing double-layer socks and shoes system based on friction nanogenerators can not only collect frictional electrical energy, but also be used for wearer sports health monitoring, health management, wearer gait analysis and early warning, etc., effectively improve user experience, promote the development of smart wearable technology, and have broad application prospects and markets.

[0059] Step S200: Use the smart sensing double-layer socks and shoes to monitor the wearer's foot movements.

[0060] Specifically, step S200 includes:

[0061] Step S201: In the initial state, the smart sensing double-layer socks and shoes are not charged. Under the external force of the sole of the wearer's foot, the second friction layer 201 of the outer sock unit and the first friction layer 101 of the inner sock unit contact each other. At this time, the smart sensing double-layer socks and shoes are in an electrostatic equilibrium state for the first time.

[0062] In some embodiments, due to the different electron affinities of different materials, electron transitions occur on the surfaces of the two materials when the two materials are in vertical contact and separation, causing the two materials to generate electrostatic charges of different polarities, and the smart sensing double-layer socks and shoes are in an electrostatic equilibrium state.

[0063] Step S202: the inner sock unit 100 and the outer sock unit 200 begin to separate under the action of external force, and the first electrostatic equilibrium state is broken, and a potential difference appears between the contact surfaces of the first friction layer 101 and the second friction layer 201. At this time, free electrons will move between the first friction layer 101 and the conductive layer 202, thereby generating a directional moving current in the circuit formed by the first friction layer 101 and the conductive layer 202; when the inner sock unit 100 and the outer sock unit 200 of the smart sensing double-layer socks and shoes are separated to a certain distance, the electrostatic charge generated by the friction between the first friction layer 101 and the conductive layer 202 is balanced again, and the smart sensing double-layer socks and shoes are in an electrostatic equilibrium state for the second time; when the wearer's foot Under the action of external force on the sole of the foot, when the smart sensing double-layer socks and shoes are applied again, the distance between the inner sock unit 100 and the outer sock unit 200 decreases, and the electrostatic equilibrium state is broken for the second time. At this time, free electrons will move between the first friction layer 101 and the conductive layer 202, thereby generating a directional moving current in the circuit formed by the first friction layer 101 and the conductive layer 202 again. When the second friction layer 201 of the outer sock unit and the first friction layer 101 of the inner sock unit contact each other again, the smart sensing double-layer socks and shoes are in the electrostatic equilibrium state for the third time; the sensor 401 transmits the foot movement electrical signal to the sending module, and the sending module sends the foot movement electrical signal to the smart device to monitor the wearer's foot movement data.

[0064] In some embodiments, first, in step S202, the separation and contact between the inner sock unit 100 and the outer sock unit 200 will cause the generation and disappearance of electrostatic charge, thereby generating current changes. Each time the charge balance is broken, different pressure areas or foot movement states of the wearer's foot sole can be accurately sensed; at the same time, by repeating step S202 many times, electric energy storage can be realized, and the electric energy storage can power the sending module, and the sending module can send the foot movement electrical signal to the smart device to monitor the wearer's foot movement data; at the same time, after repeating step S202 many times, the smart double-layer sensing socks and shoes can continuously monitor the wearer's pressure distribution or movement changes in walking, running, standing, etc., and each break and rebalance of the electrostatic balance can be used as a data collection point for the foot movement electrical signal, and through the friction nanogenerator technology, the charge generated by the socks and shoes during each separation and contact process can be self-powered, and the wearer's foot movement data can be stably monitored for a long time, and the wearer's foot movement data includes: gait data, sole pressure data, and at least one of exercise intensity data.

[0065] In some embodiments, gait refers to the movement pattern between the two feet of a person when walking or running. Gait data can provide at least one of the information such as the wearer's movement habits, step length, step frequency, stride, and gait symmetry. By monitoring gait, the wearer's movement pattern can be analyzed to help detect whether there are gait abnormalities, such as excessive inversion, eversion, or unstable steps. These data have important application value in rehabilitation therapy, sports medicine, and fall risk assessment for the elderly.

[0066] In some embodiments, plantar pressure refers to the pressure distribution of various parts of the sole of the foot when the wearer is walking or standing. By indirectly monitoring the plantar pressure data through sensors, the plantar contact time, pressure distribution diagram and its changing trend in each gait can be obtained. These data are not only helpful for analyzing whether the gait is normal, but also can evaluate the wearer's standing posture, find out whether there is an imbalance in posture (such as excessive pressure on one side), and provide a reference for the prevention and treatment of foot diseases (such as plantar fasciitis, flat feet, etc.).

[0067] In some embodiments, exercise intensity refers to the intensity and duration of exercise when the wearer is exercising. Exercise intensity data can be inferred by analyzing at least one of the pressure changes, step frequency, step length, and other data generated during exercise. For example, long-term high-intensity exercise may lead to increased plantar pressure and gait changes, while low-intensity exercise may show a gentler foot contact. Monitoring exercise intensity helps guide the wearer to exercise scientifically, avoid excessive exercise and sports injuries, and also helps to provide more suitable training programs for exercisers.

[0068] In the present invention, the foot motion data of the wearer includes at least one of gait, plantar pressure and exercise intensity. By analyzing the changes in gait and plantar pressure, it is determined whether the wearer is in a state of excessive fatigue or whether there are potential risks during exercise. By monitoring the exercise intensity, the wearer's exercise load can be quantitatively evaluated, and personalized suggestions can be provided for the wearer's health management, exercise adjustment and rehabilitation treatment. In this way, the wearer can be provided with comprehensive foot health monitoring and scientific exercise guidance.

[0069] Test example of smart sensing double-layer socks and shoes based on triboelectric nanogenerator

[0070] (1) Obtaining smart sensing double-layer socks and shoes based on friction nanogenerators

[0071] Step S11: weaving double-layer socks and shoes, the double-layer socks and shoes include: an inner sock unit 100 and an outer sock unit 200; the outer sock unit 200 supports the inner sock unit 100 through a supporting unit, and the inner sock unit 100 is connected to the outer sock unit 200; the inner sock unit 100 includes a first friction layer 101 and a sensing layer 102, the outer sock unit includes a second friction layer 201 and a conductive layer 202, the sensing layer 102 includes a plurality of sensing areas; the plurality of sensing areas include a sensing area 1 and a sensing area 2, the raw materials of the sensing layer 102 and the second friction layer 201 both include 160D polyester, the first friction layer 101 includes a first friction layer 102 and a conductive layer 202, the sensing layer 102 includes a plurality of sensing areas; the plurality of sensing areas include a sensing area 1 and a sensing area 2, the raw materials of the sensing layer 102 and the second friction layer 201 both include 160D polyester, the first friction layer 101 includes a first friction layer 101 and a conductive layer 202, the sensing layer 102 includes a first friction layer 101 and a conductive layer 202, the sensing layer 102 includes a plurality of sensing areas; the plurality of sensing areas include ... first friction layer 101 and a conductive layer 202, the sensing layer 102 includes a first friction layer 101 and a The conductive layer 101 and the conductive layer 202 both include conductive yarns, and the raw materials of the conductive yarns include 100D silver-plated polyester; based on the double yarn mouth feeding method, the double-layer socks and shoes are woven by the method of single-sided front and single-sided back plus middle tuck loops, the raw materials of the yarns of the single-sided front and single-sided back of the inner sock unit 100 are polyester, woven to form the induction layer 102, and the middle tuck loops are woven with conductive yarns to form the first friction layer 101; the raw materials of the yarns of the single-sided front and single-sided back of the outer sock unit 200 are polyester, woven to form the second friction layer 201; the middle tuck loops are made of conductive yarns, woven to form the conductive layer 202;

[0072] Step S12: The double-layer socks and shoes are connected to the sole unit 300, the sensor 401 is a piezoelectric sensor, the sensor 401 is arranged on the sensing layer 102, the first friction layer 101 is connected to the conductive layer 202 through the connecting unit 402, the connecting unit 402 is connected to the full-wave rectifier circuit and the energy storage device, the energy storage device is connected to the sending module, and the sensor 401 communicates with the sending module to obtain an intelligent sensing double-layer socks and shoes based on the friction nanogenerator.

[0073] (2) Test method

[0074] 1) The material of the external friction layer simulating the sole of the wearer's foot is a polytetrafluoroethylene (PTFE) film, and the external friction layer is placed on the woven smart sensing double-layer socks and shoes, and the inner sock sensing layer 102 is in contact with the external friction layer.

[0075] 2) The external friction layer simulating the sole of the wearer's foot can move linearly in the vertical direction. The external friction layer is installed on a linear motor (manufacturer LinMot, model: E1100) that can adjust the vertical movement distance and vertical movement speed; by controlling the movement of the linear motor, the first friction layer 101 of the inner sock unit and the second friction layer 201 of the outer sock unit produce periodic vertical contact-separation movement. Specifically, the polytetrafluoroethylene membrane moves linearly in the reciprocating vertical direction at a speed of 50 mm / s, a load pressure of 1 kPa, and a vertical movement distance of 50 mm, thereby causing the first friction layer 101 of the inner sock unit and the second friction layer 201 of the outer sock unit to produce periodic vertical contact-separation movement.

[0076] 3) During operation, the plurality of sensing areas include sensing area 1 and sensing area 2, the size of sensing area 1 is 6 cm (length) × / 4 cm (width), and the size of sensing area 2 is 4 cm (length) × / 3 cm (width). A triboelectric output test is performed on sensing area 1 and sensing area 2. Specifically, two sensors 401 are provided, both of which are piezoelectric sensors. One sensor 401 is provided on sensing area 1 of the sensing layer 102, and the other sensor 401 is provided on sensing area 2 of the sensing layer 102. When the external friction layer simulating the sole of the wearer's foot is linearly moved in the vertical direction, During exercise, when pressure acts on the two sensors 401, the piezoelectric sensor works, senses the wearer's foot movement and converts it into foot movement electrical signals, and sends the collected foot movement electrical signals to the sending module; at the same time, since the current output by the friction nanogenerator is alternating current, in order to enable the sending module to work continuously, the input alternating current is converted into direct current through a diode and a full-wave rectifier circuit and output to the energy storage device. The energy storage device can power the sending module, thereby achieving a self-powered effect, so that the sending module can work continuously and output the collected foot movement electrical signals, and output the foot movement electrical signals (open circuit voltage, short circuit current and short circuit charge) collected in real time as more intuitive and clear digital signals on the LabVIEW platform.

[0077] In other embodiments, the polytetrafluoroethylene (PTFE) film may not be used to simulate the external friction layer of the sole of the human foot. The wearer can directly put on the smart sensing double-layer socks and shoes, and the wearer can adjust the posture of the sole of the foot while standing. The sole of the wearer's foot contacts the inner sock unit, and the inner sock unit and the outer sock unit will produce a periodic vertical contact-separation movement. The current output between the first friction layer 101 and the conductive layer 202 is alternating current. The alternating current is converted into direct current through the full-wave rectifier circuit of the full-wave rectifier device and output to the energy storage device. The energy storage device can power the sending module. The sensor 401 is connected to the wearer. The wearer's foot movement is sensed and converted into foot movement electrical signals. The sending module can send foot movement electrical signals to achieve long-term and stable monitoring of the wearer's gait, plantar pressure, exercise intensity and other physiological data. These physiological data can be used to reflect the pressure distribution and gait of the wearer's sole. The wearer's physiological function, pathological mechanics and even various changes in mental state will affect the wearer's gait to varying degrees. By analyzing and processing these physiological data, the wearer's sports health monitoring, health management, gait analysis and early warning can be performed in real time, thereby improving the wearer's experience and promoting the development of smart wearable technology.

[0078] Therefore, in the present invention application, the mature double-layer socks and shoes technology is combined with the friction nanogenerator. The raw materials of the intelligent sensing double-layer socks and shoes are easy to obtain, and they are comfortable to wear and breathable. While meeting the requirements of self-power supply, they can also stably monitor the wearer's gait, plantar pressure, exercise intensity and other physiological data for a long time, providing the wearer with a more intelligent, personalized and healthy wearing experience, and have good technical value and market prospects.

[0079] What is shown in the accompanying drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. The above-mentioned various embodiments or the combination of some of the features thereof constitute the scope of protection of the present invention. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the present invention, they should all fall within the scope of protection of the present invention.

Claims

1. An intelligent sensing double-layer sock shoe based on a friction nanogenerator, characterized in that: include: Inner sock unit, outer sock unit, sole unit and sensor unit; The inner sock unit supports the sole of the foot, the outer sock unit supports the inner sock unit, and the inner sock unit is connected to the outer sock unit; the inner sock unit includes a first friction layer and a sensing layer, the outer sock unit includes a second friction layer and a conductive layer, the sensing layer is connected to the sensor unit, the sensing unit includes a sensor and a sending module, the sensor is arranged on the sensing layer, the sensor senses the wearer's foot movement and converts it into an electrical signal of the foot movement, the first friction layer is connected to the conductive layer through the connecting unit, the sending module is connected to the connecting unit, and the sensor communicates with the sending module.

2. According to claim 1, the intelligent sensing double-layer socks and shoes based on friction nanogenerators are characterized in that: The materials of the induction layer and the second friction layer include at least one of polyester, nylon, polypropylene, wool and silk; the first friction layer and the conductive layer include conductive yarn, and the material of the conductive yarn includes at least one of silver-plated polyester and silver-plated nylon.

3. According to claim 2, the intelligent sensing double-layer socks and shoes based on friction nanogenerators are characterized in that: The outer sock unit supports the inner sock unit through a supporting unit, and the supporting unit includes chemical fibers or natural fibers that are non-conductive and have relatively strong dielectric properties.

4. The intelligent sensing double-layer socks and shoes based on friction nanogenerator according to claim 3 is characterized in that: The sensing layer includes M sensing areas, and the multiple sensing areas correspond one-to-one to multiple pressure areas on the sole of the wearer's foot: N sensors are provided, each sensor is provided in each sensing area, the sensor includes a piezoelectric sensor, M is greater than or equal to N, M is a positive integer greater than or equal to 2, and N is a positive integer.

5. A method for monitoring the foot movement of a wearer using a smart sensing double-layer socks and shoes, using a smart sensing double-layer socks and shoes based on a friction nanogenerator as claimed in any one of claims 1 to 4, comprising: Step S100: obtaining a smart sensing double-layer sock shoe based on a friction nanogenerator; Step S100 includes: Step S101: weaving double-layer socks and shoes, the double-layer socks and shoes include: an inner sock unit and an outer sock unit; the outer sock unit supports the inner sock unit through a supporting unit, and the inner sock unit is connected to the outer sock unit; the inner sock unit includes a first friction layer and an induction layer, the outer sock unit includes a second friction layer and a conductive layer, and the induction layer includes a plurality of induction areas; based on a double yarn mouth feeding method, the double-layer socks and shoes are woven in a method of front single side, back single side and middle tuck loop, the raw materials of the yarns of the front single side and back single side of the inner sock unit are at least one of polyester, nylon, polypropylene, wool and silk, and the induction layer is formed by weaving, and the middle tuck loop is woven by conductive yarn to form the first friction layer; the raw materials of the yarns of the front single side and back single side of the outer sock unit are at least one of polyester, nylon, polypropylene, wool and silk, and the second friction layer is formed by weaving; the middle tuck loop is woven by conductive yarn to form a conductive layer; Step S102: The double-layer socks and shoes are connected to the sole unit, the sensor is set on the sensing layer, the first friction layer is connected to the conductive layer through the connecting unit, the sending module is connected to the connecting unit, and the sensor communicates with the sending module to obtain an intelligent sensing double-layer socks and shoes based on the friction nanogenerator; Step S200: Use the smart sensing double-layer socks and shoes to monitor the wearer's foot movements.

6. A method for monitoring the foot movement of a wearer using smart sensing double-layer socks and shoes according to claim 5, characterized in that: Step S200 includes: Step S201: In the initial state, the smart sensing double-layer socks and shoes are not charged. Under the external force of the sole of the wearer's foot, the second friction layer of the outer sock unit and the first friction layer of the inner sock unit contact each other. At this time, the smart sensing double-layer socks and shoes are in an electrostatic equilibrium state for the first time. Step S202: the inner sock unit and the outer sock unit begin to separate under the action of external force, and the first electrostatic equilibrium state is broken, and a potential difference appears between the contact surfaces of the first friction layer and the second friction layer. At this time, free electrons will move between the first friction layer and the conductive layer, thereby generating a directional moving current in the circuit formed by the first friction layer and the conductive layer; when the inner sock unit and the outer sock unit of the smart sensing double-layer socks are separated to a certain distance, the electrostatic charge generated by the friction between the first friction layer and the conductive layer is balanced again, and the smart sensing double-layer socks are in an electrostatic equilibrium state for the second time; when the sole of the wearer's foot Under the action of external force, when the smart sensing double-layer socks and shoes are acted on again, the distance between the inner sock unit and the outer sock unit decreases, and the electrostatic equilibrium state is broken for the second time. At this time, free electrons will move between the first friction layer and the conductive layer, thereby generating a directional moving current in the circuit formed by the first friction layer and the conductive layer again. When the second friction layer of the outer sock unit and the first friction layer of the inner sock unit contact each other again, the smart sensing double-layer socks and shoes are in an electrostatic equilibrium state for the third time, and the sensor transmits the foot movement electrical signal to the sending module. The sending module sends the foot movement electrical signal to the smart device to monitor the wearer's foot movement data.

7. A method for monitoring the foot movement of a wearer using smart sensing double-layer socks and shoes according to claim 6, characterized in that: The wearer's foot motion data includes at least one of gait data, plantar pressure data, and exercise intensity data.

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