CN112947745B - Pain feedback flexible wearable device and method based on chemical reaction - Google Patents

Abstract

The invention discloses pain feedback flexible wearable equipment and a method based on chemical reaction, wherein the equipment comprises a binding band, a three-layer structure, a micro liquid pump, a liquid storage bin and a control circuit board; the three-layer structure comprises a heat dissipation system layer, a temperature control layer and a chemical substance conveying layer; the chemical substance conveying layer is provided with a microflow pipeline which can release the chemical agent which can generate pain to the skin surface of a wearer; the temperature control layer comprises a temperature sensor and a Peltier, and the bottom of the temperature control layer is provided with a microneedle which is embedded into the skin and used for heat transfer; the control circuit board controls the start, stop and power of the micro liquid pump according to the virtual scene event signal of the VR system, controls the temperature generated by the Peltier, and receives real-time temperature data of the temperature sensor. The invention utilizes the micro chemical reaction of the chemical agent generating the pain to the skin to generate the pain, the pain combines with the temperature to jointly simulate diversified pain, and the VR equipment is matched to enhance the virtual reality.

Description

Pain feedback flexible wearable device and method based on chemical reaction

Technical Field

The invention relates to flexible wearable equipment, in particular to flexible wearable equipment for generating pain feedback based on chemical reaction and a pain feedback method.

Background

The wearable device is characterized in that daily wearing of people is intelligently configured by using a wearable technology, various sensors, identification, connection, cloud service and the like are implanted into daily wearing of people such as glasses, watches, bracelets, clothes, shoes and socks, accordingly, the perception capability of a user is expanded, and the wearable device is attractive in appearance and easy to wear. Wearable devices have four basic attributes, including not being distracting to the user, not being user-limited, being controllable by the user, being communicable with others. Meanwhile, the wearable device has four basic operation attributes, namely persistence, enhancement, mediation and privacy. The persistence means that the wearable device is always in an operating state and constantly interacts with the user, for example, the smart watch records the motion data of the user in real time. Enhanced refers to the wearable device can run and provide services to the user while the user is doing things, e.g., enhance the user's senses, assist in analyzing data, etc. Mediation refers to the wearable device being able to achieve human-to-device integration. Compare in handheld devices such as cell-phone, flat board, wearable equipment can contact with the skin, fuse with the human body, measures human physiological index, really realizes the integration of people with equipment. In addition, the wearable device may filter some signals that the user is unwilling to see, such as advertisements, and then slowly change the user's perception of reality in a gentle manner. Privacy refers to the wearable device that can protect our privacy as much as the user wears clothes on a daily basis. The privacy information of the computer or the mobile phone is possibly snooped by people, while the privacy of the wearable device is protected, and other people cannot operate the wearable device without permission of a user. Based on the characteristics, the wearable equipment is widely applied to the fields of sports fitness, medical care, social entertainment, pet wearing, safety protection and the like.

The flexible wearable device is further, compared with ordinary wearable device, flexible wearable device has integrated flexible material and flexible electronic technology to it is lighter, dress more comfortable more. The flexible electronic technology is a novel electronic technology for manufacturing electronic components made of organic and inorganic materials on flexible materials such as plastic or thin gold substrates with high flexibility and ductility, and the existing applications comprise flexible electronic displays, organic light-emitting diodes (OLEDs), thin-film solar cells, flexible biochemical signal sensors and the like. Therefore, the flexible wearable technology based on the flexible electronic technology has great mechanical flexibility, can adapt to different working environments to a certain extent, and meets the deformation requirements of human bodies, pets and the like on equipment in daily activities. Compared with common wearable devices, flexible wearable devices are generally small in size and light in weight, can be worn for a long time without fatigue, and are widely applied to many aspects of human life, such as electronic skins, wearable physiological monitoring and treatment devices, flexible conductive fabrics, thin film transistors, transparent thin film flexible gates and the like. A miniature supercapacitor for the manufacture of textile planes developed by the subject group as taught in Wang Zhonglin; electronic skin composed of mechanically flexible and stretchable sensor networks, etc., that can be used for sensory detection, quantifying various stimuli to mimic the human sensory system. Also as a scalable array of polymer transistors developed by the professor group Bao Zhena for making stretchable skin. And flexible skin, visceral physiological signal sensors developed by the subject group of professor john rogers, and the like. Generally, flexible wearable devices are most rapidly developed in the biomedical field, and there is a high demand for flexible wearable devices in the fields of entertainment, sports, and the like. For example, in the field of Virtual Reality (VR), real-time haptic feedback has been a hot spot of research in related fields, and flexible wearable devices have great application potential in this field.

Virtual Reality (VR) technology, which utilizes computer simulation to generate a virtual world of a three-dimensional space, provides simulation of senses of vision and the like for a user, enables the user to feel as if the user is in the real-time and unrestricted observation of things in the three-dimensional space, and when the user moves, the computer immediately performs complex operation and returns an accurate three-dimensional world image to generate the presence. The technology integrates the latest development of technologies such as computer graphics, computer simulation, artificial intelligence, induction, display, network parallel processing and the like, and is a high-technology simulation system generated by assistance of computer technology. At present, the simulation of virtual reality technology in vision has been greatly developed, but there is still enough research space in touch. Haptic sensation, one of the most important human senses, is not well simulated in virtual reality systems. Particularly, for the simulation of pain, a more convenient and effective device needs to be developed urgently, and wearable equipment has certain potential in the field.

Disclosure of Invention

The invention aims to provide pain feedback flexible wearable equipment based on chemical reaction and a pain feedback method.

In order to achieve the purpose, the invention adopts the technical scheme that:

a pain feedback flexible wearable device based on chemical reaction comprises a bandage, a three-layer structure connected with the bandage, a micro liquid pump, a liquid storage bin and an external control circuit board; wherein the content of the first and second substances,

the liquid storage bin is used for storing chemical agents which generate pain;

one port of the micro liquid pump is connected with the liquid storage bin and is used for conveying the chemical agent;

the three-layer structure comprises a heat dissipation system layer at the top layer, a temperature control layer at the middle layer and a chemical substance conveying layer at the bottom layer; a penetrating central hole is formed in the center of the chemical substance conveying layer, a micro-flow pipeline is arranged on the chemical substance conveying layer and surrounds the central hole, one end of the micro-flow pipeline is connected to the other end of the micro-liquid pump and used for introducing the chemical agent, and the other end of the micro-flow pipeline is located at the central hole and used for releasing the chemical agent to the skin surface of a wearer; the temperature control layer comprises a temperature sensor and a Peltier, the bottom of the temperature control layer is provided with a microneedle which can penetrate through the central hole, and the microneedle is used for being embedded into the skin epidermis of a wearer and conducting heat transfer between the Peltier and the skin; the heat dissipation system layer is connected on the temperature control layer and used for dissipating heat;

the control circuit board is connected with the temperature sensor, the Peltier and the micro liquid pump and is provided with an interface externally connected with the VR system, and the control circuit board is used for controlling the starting and stopping and the power of the micro liquid pump, controlling the temperature generated by the Peltier and receiving the real-time temperature data of the temperature sensor according to a virtual scene event signal sent by the VR system through a preset control strategy.

Furthermore, the heat dissipation system layer comprises an upper fan and a lower heat dissipation plate, and the heat dissipation plates are connected to the temperature control layer.

Further, the fan is fixed on the heat sink through screw connection, and the heat sink is adhered to the temperature control layer through an adhesive.

Furthermore, the control circuit board is connected with the fan and controls the start and stop of the fan.

Further, the micro liquid pump and the liquid storage bin are adhered to the binding band through an adhesive.

Further, the control circuit board adopts an Arduino control circuit board.

Furthermore, the chemical substance transport layer is made of a siloxane elastomer material and is molded by a hard mold.

Further, the chemical agent is selected from TRP nerve agonist, including histamine solution, dihydrocapsaicin solution or capsaicin solution.

A pain feedback method based on chemical reaction is based on the equipment and comprises the following steps:

the pain feedback flexible wearable device based on the chemical reaction is worn on a body part of a wearer and is externally connected to a VR system, and the micro-needle of the temperature control layer is embedded into the skin epidermis of the wearer;

starting a control circuit board of the equipment, wherein the control circuit board controls a micro liquid pump to deliver chemical agents generating pain feeling through a preset control strategy according to virtual scene event signals sent by a VR system, so that the on-off and flow of the chemical agents in a micro flow pipeline are controlled, the temperature generated by the Peltier is controlled, and real-time temperature data of a temperature control layer are received;

the micro-needles transmit heat to or absorb heat from the skin of the wearer, and the chemical agents act on pain nerve endings of the skin of the wearer to generate pain, so that the pain generated by the virtual scene events is simulated together.

Further, the control circuit board controls the starting and stopping of the fan.

Compared with the prior art, the invention has the advantages that: 1) The equipment can generate different levels of pain sensation feelings by using chemical agents generating the pain sensation through adjusting the temperature, and compared with the traditional mechanical and electronic pain sensation feedback equipment, the equipment can simulate unique pain feelings such as burning sensation, corrosive pain sensation and the like; 2) The device can generate different pain feelings through the micro chemical reaction on the skin, can generate long-time continuous feelings after one-time action, and has significant duration compared with the traditional mechanical and electronic pain feedback devices; 3) The device can be conveniently worn on each part of the body, thereby meeting the pain feedback requirements of different parts of the body; 4) The device can provide more real pain simulation under the condition of not damaging skin tissues; 5) The equipment can generate and eliminate pain sense in time, thereby meeting the timeliness requirement of the VR system.

Drawings

Fig. 1 is a schematic three-dimensional structure diagram of a pain feedback flexible wearable device based on chemical reaction according to the invention.

Fig. 2 is a top view of the upper layer of the pain feedback flexible wearable device based on chemical reaction according to the present invention.

In the figure: the device comprises a fan 1, a microneedle 2, a chemical substance conveying layer 3, a micro liquid pump 4, a liquid storage bin 5, a heat radiating fin 6, a Peltier 7, a temperature sensor 8, a micro flow pipeline 9 and a binding band 10.

Detailed description of the preferred embodiments

The present invention is described in detail with reference to the following embodiments, but the scope of protection is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the scope of protection of the present invention.

The embodiment discloses a wearable device for pain feedback based on chemical reaction, which is structurally shown in fig. 1-2 and comprises a bandage 10, a three-layer structure connected to the bandage 10, a micro liquid pump 4 and a liquid storage tank 5, and an external control circuit board (not shown). Wherein, the liquid storage bin 5 is used for storing chemical agents which generate pain. One port of the micro liquid pump 4 is connected to the liquid storage bin 5 and is used for conveying the chemical agent. The three-layer structure comprises a heat dissipation system layer at the top layer, a temperature control layer at the middle layer and a chemical substance conveying layer 3 at the bottom layer. The central point of chemical delivery layer 3 puts and is equipped with a central hole that runs through, and chemical delivery layer 3 goes up and is equipped with microflow pipeline 9 around central hole, and the other end of miniature liquid pump 4 is connected to the one end of this microflow pipeline 9 for let in chemical agent, the other end of this microflow pipeline 9 is located central hole department, is used for with chemical agent releases to the wearer's skin surface. The temperature control layer includes temperature sensor 8 and peltier 7, and the bottom of temperature control layer is equipped with the micropin 2 that can pass central hole, and this micropin 2 is used for as the heat conduction bridge between peltier 7 and the wearer's skin. The heat dissipation system layer comprises an upper fan 1 and a lower heat dissipation sheet 6, and the heat dissipation sheet 6 is connected to the temperature control layer and used for dissipating heat. The control circuit board is connected with the temperature sensor 8, the Peltier 7 and the micro liquid pump 4 and is provided with an interface externally connected with a VR system, and the control circuit board is used for controlling the starting, the stopping and the power of the micro liquid pump 4 through a preset control strategy according to a virtual scene event signal sent by the VR system, controlling the temperature generated by the Peltier 7 and receiving real-time temperature data of the temperature sensor 8.

Wherein, a mold is prepared by utilizing a 3D printing technology, and the siloxane elastomer flexible material is poured into the mold for molding to prepare the chemical substance conveying layer 3. The annular peltier 7 is snapped into the central hollow of the chemical delivery layer 3. The upper surface of the chemical substance transport layer 3 and the heat sink 6 are bonded by an adhesive, and the lower surface thereof and the temperature sensor 8 are bonded by an adhesive. The fan 1 and the heat sink 6 are fixed by screws. And the band 10 is passed through the heat sink 6 by a string to be connected and fixed. The miniature liquid pump 4 and the liquid storage bin 5 are connected into a whole through a pipeline and then are bonded with the binding band 10 through an adhesive, so that the wearable pain feedback equipment based on chemical reaction is obtained. Wherein, the chemical agent for generating pain is selected from TRP nerve stimulant and is delivered to the skin surface by the microflow pipeline 9 of the chemical substance delivery layer 3.

This embodiment also discloses a pain feedback method based on chemical reaction, which is specifically described as follows:

in using the above-described device, the user needs to secure the device to the body part where the user needs to feel, including but not limited to the arms, palms, legs, torso, etc. When a user encounters scenes which can generate pain in reality, such as chemical substance corrosion, boiled water scald, animal bite and the like in a VR system, a virtual scene event signal is sent, the control circuit board controls chemical agents which can generate the pain, such as TRP nerve agonists, according to the signal through a preset control strategy, the chemical agents flow out through the microfluidic pipeline 9 in a liquid mode and cover the skin action surface, the temperature of the micro-needle 2 is controlled through the control strategy, and the pain with corresponding grade is generated under the condition that the skin tissue of a human body is not damaged. The TRP nerve agonist producing pain sensation was delivered to the microfluidic channel 9 of the chemical transport layer 3 via the external microfluidic channel 9. The microneedle 2 is embedded into the epidermis after the bandage 10 is tightly bound, and a skin channel is opened, so that the TRP nerve agonist contacts with pain nerves positioned in the dermis layer to generate pain, and the upper limit of the duration time of the pain can be controlled within 10-30 min. TRP neural agonists are capable of lowering the threshold of the TRP ion channel for pain sensation produced by temperature stimulation and thus are capable of producing corresponding pain levels at lower temperatures. The liquids of different temperatures may be provided externally. The Arduino control circuit board and the battery are both worn on the arm. The control strategy is a docking protocol related to virtual scene event signals and parameters such as chemical agent flow and temperature control, and is preset in the control circuit board, for example, a virtual event is burnt by a certain level of fire, and the fire burning event of the level corresponds to the parameters such as a certain chemical agent flow value and temperature value.

The pain feedback flexible wearable device based on the chemical reaction comprises the following steps in practical use:

step 1: wearing a chemical reaction-based pain feedback flexible wearable device, binding a bandage 10 tightly, embedding the micro-needle 2 into the skin surface to open a skin channel, and starting the micro liquid pump 4;

step 2: starting an Arduino control circuit board of the device and Unity software for controlling VR scenes, and selecting the VR scenes;

and step 3: when a virtual scene event of pain, itching, heat, cold and the like is encountered in a scene, the virtual scene event signal is sent to a control circuit board of the equipment, after the control circuit board identifies, the temperature of the surface of the skin is controlled through a temperature control layer, the pain is generated through a chemical substance conveying layer, and different types of feelings are generated by combining the temperature and the pain;

and 4, step 4: and finishing the VR event scene, controlling the temperature change of the surface of the skin by the control circuit board according to the finished signal, manually smearing pain-removing medicaments after the VR event scene is taken down, and flushing the surface of the skin with cold water to stop pain sensation.

Specific examples of applications are listed below:

example 1:

when a user encounters chemical corrosion in a VR system, the temperature is controlled to 40 ℃, and a 0.1% histamine solution flows out through a microfluidic channel in a liquid manner and covers the action surface, creating a pain sensation that the body feels as a result of the chemical corrosion.

Example 2:

when a user is scalded by boiled water in a VR system, the temperature is controlled to be 37 ℃, and a 0.05% dihydrocapsaicin solution flows out through a microflow pipeline in a liquid mode and covers an action surface to generate pain feeling which is generated by scalding of the boiled water by a human body.

Example 3:

when a user encounters an animal bite in the VR system, the temperature is controlled to 39 ℃, and a 0.01% capsaicin solution flows out in a liquid manner through the microfluidic channel and covers the active surface, creating a painful sensation that the human body feels as the animal bites.

Example 4:

when a user encounters a mosquito bite in the VR system, a dihydrocapsaicin solution at a concentration of 0.005% at a temperature of 25 ℃ is controlled to flow in a liquid manner through the microfluidic channel and cover the affected surface, creating a painful sensation felt by the body as a result of the mosquito bite.

Example 5:

when a user encounters a hot oil burn in the VR system, the temperature is controlled to 36 ℃, and a 0.1% histamine solution is discharged in a liquid form through the microfluidic channel and covers the active surface, creating a painful sensation that the body feels as a result of the hot oil burn.

Example 6:

when a user encounters a tattoo in a VR system, the temperature is controlled at 32 ℃, and a 0.01% capsaicin solution flows out in a liquid manner through the microfluidic channel and covers the affected surface, creating a painful sensation that the human body feels as a tattoo.

Claims (10)

1. A pain feedback flexible wearable device based on chemical reaction is characterized by comprising a bandage, a three-layer structure connected with the bandage, a micro liquid pump, a liquid storage bin and an external control circuit board; wherein the content of the first and second substances,

the liquid storage bin is used for storing chemical agents which generate pain, and the chemical agents are selected from TRP nerve agonists;

one port of the micro liquid pump is connected with the liquid storage bin and is used for conveying the chemical agent;

the three-layer structure comprises a heat dissipation system layer at the top layer, a temperature control layer at the middle layer and a chemical substance conveying layer at the bottom layer; a penetrating central hole is formed in the center of the chemical substance conveying layer, a micro-flow pipeline is arranged on the chemical substance conveying layer and surrounds the central hole, one end of the micro-flow pipeline is connected to the other end of the micro-liquid pump and used for introducing the chemical agent, and the other end of the micro-flow pipeline is located at the central hole and used for releasing the chemical agent to the skin surface of a wearer; the temperature control layer comprises a temperature sensor and a Peltier, the bottom of the temperature control layer is provided with a microneedle which can penetrate through the central hole, and the microneedle is used for being embedded into the skin epidermis of a wearer and conducting heat transfer between the Peltier and the skin; the heat dissipation system layer is connected on the temperature control layer and used for dissipating heat;

the control circuit board is connected with the temperature sensor, the Peltier and the micro liquid pump and is provided with an interface externally connected with a VR system, the control circuit board is used for controlling the starting and stopping and the power of the micro liquid pump through a preset control strategy according to a virtual scene event signal sent by the VR system, controlling the temperature generated by the Peltier and receiving real-time temperature data of the temperature sensor, and the control strategy is a butt joint protocol related to the virtual scene event signal and controlling the flow and the temperature parameters of the chemical agent.

2. The apparatus of claim 1, wherein the heat dissipation system layer comprises an upper layer of fans and a lower layer of heat sinks, the heat sinks being attached to the temperature control layer.

3. The apparatus of claim 2, wherein the fan is secured to the heat sink by a screw connection, the heat sink being attached to the temperature control layer by an adhesive.

4. The apparatus of claim 2, wherein the control circuit board is coupled to the fan and controls the start and stop of the fan.

5. The apparatus of claim 1, wherein the micro fluid pump and the reservoir are affixed to the strap by an adhesive.

6. The apparatus of claim 1, wherein the control circuit board is an Arduino control circuit board.

7. The apparatus of claim 1, wherein the chemical delivery layer is formed of a silicone elastomer material and is molded with a rigid mold.

8. The apparatus of claim 1, wherein the TRP neuroagonist comprises a histamine solution, a dihydrocapsaicin solution, or a capsaicin solution.

9. A pain feedback method based on a chemical reaction, based on the device of any one of claims 1-8, characterized in that the method comprises the following steps:

the pain feedback flexible wearable device based on the chemical reaction is worn on a body part of a wearer and externally connected to a VR system, and the micro-needle of the temperature control layer is embedded into the skin epidermis of the wearer;

starting a control circuit board of the equipment, wherein the control circuit board controls a micro liquid pump to convey chemical agents generating pain according to virtual scene event signals sent by a VR system through a preset control strategy, so that the on-off and flow of the chemical agents in a micro flow pipeline are controlled, the temperature generated by the Peltier is controlled, and real-time temperature data of a temperature control layer are received;

the micro-needles transmit heat to or absorb heat from the skin of the wearer, and the chemical agents act on pain nerve endings of the skin of the wearer to generate pain, so that the pain generated by the virtual scene events is simulated together.

10. The method of claim 9, wherein the control circuit board controls the start and stop of the fan.

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