CN115591002A

CN115591002A - Virtual smell generation system

Info

Publication number: CN115591002A
Application number: CN202211291016.3A
Authority: CN
Inventors: 陈翔宇; 杨鹏
Original assignee: Beijing Institute of Nanoenergy and Nanosystems
Current assignee: Beijing Institute of Nanoenergy and Nanosystems
Priority date: 2022-10-21
Filing date: 2022-10-21
Publication date: 2023-01-13

Abstract

The invention relates to the technical field of human body interaction equipment, and discloses a virtual smell generation system, which comprises: a mask for covering the mouth and nose regions of a human face; the spray emission device is fixed on the inner side of the mask and can spray mist-shaped liquid drops in a power-on state; the receiving device is positioned at one side of the corresponding spray emission device close to the face of the human body and is used for receiving the mist-shaped liquid drops sprayed by the spray emission device, and the receiving device can accelerate the evaporation of the received liquid drops in a power-on state; and the output terminal of the power supply is electrically connected with the spray emission device and the receiving device. The virtual olfaction generation system can enable the spray emission device to respond quickly and liquid drops to evaporate quickly, has high compatibility, and can reduce the occupied space of the system.

Description

Virtual smell generation system

Technical Field

The invention relates to the technical field of human body interaction equipment, in particular to a virtual smell generation system.

Background

Virtual reality and augmented reality technologies establish a communication channel between the real world and the virtual world and provide immersive, interactive and imaginative simulation experience for users. Olfaction is also an unavoidable element in order to reconstruct a complete virtual environment. Compared to visual and auditory perception, olfactory production has many unique requirements, such as high sensitivity, inertia, repeatability, and individual variation. The addition of an olfactory simulator to a traditional audiovisual virtual environment not only enhances the realism of the immersive experience, but also provides an additional way to manipulate the mood and memory of the person. Generally, there are four methods of odor generation for virtual olfactory devices: free discharge, card-based heating, surface acoustic wave atomization, and gas injection. However, these methods have their own limitations, such as slow free-emission response speed, poor compatibility of the cassette heating system, loud working noise of the acoustic atomizer, large volume of the gas injection device, etc.

Disclosure of Invention

The invention provides a virtual smell generation system, which can enable a spray emission device to quickly respond and liquid drops to quickly evaporate, is easy to realize the electric connection structure of a power supply, the spray emission device and a receiving device, has high compatibility, and can reduce the occupied space of the system by atomizing liquid.

In order to achieve the purpose, the invention provides the following technical scheme:

a virtual olfaction generation system comprising:

a mask for covering the mouth and nose regions of a human face;

the spray emission device is fixed on the inner side of the mask and can spray mist-shaped liquid drops in a power-on state;

the receiving device is positioned on one side of the corresponding spray emission device close to the face of a human body and used for receiving the atomized liquid drops sprayed by the spray emission device, and the receiving device can accelerate the evaporation of the received liquid drops in a power-on state;

and the output terminal of the power supply is electrically connected with the spray emission device and the receiving device.

The virtual olfactory generating system comprises a face mask, at least one spray transmitting device, at least one receiving device and a power supply, wherein the face mask can cover the mouth, nose and other regions of the face of a human body, the generated smell can be ensured to enter the nasal cavity of a user, an output terminal of the power supply is electrically connected with the spray transmitting device and the receiving device, the power supply can provide a high-voltage electric field for the spray transmitting device and the receiving device, and in the using process, the spray transmitting device can spray fog-shaped liquid drops in the electrified state and has the characteristic of high transmission response speed.

Optionally, the power supply is a triboelectric nanogenerator.

Optionally, the friction nanogenerator comprises a first support plate, a second support plate, a first friction material part, a second friction material part, a disc electrode, an output terminal, a conducting rod and a driving motor;

the first supporting plate and the second supporting plate are oppositely arranged;

the disc electrode is positioned between the first supporting plate and the second supporting plate, a first sector electrode array arranged around the central line of the disc electrode is arranged on one side of the disc electrode facing the first supporting plate, a second sector electrode array arranged around the central line of the disc electrode is arranged on one side of the disc electrode facing the second supporting plate, and electrodes in the first sector electrode array and electrodes in the second sector electrode array are arranged in a staggered mode;

the first friction part and the second friction part are positioned on one side of the first supporting plate facing the disc electrode, and the first friction part and the second friction part are opposite in charged polarity;

the conducting rod and the output terminal are positioned on one side of the second support plate far away from the first support plate, and the conducting rod and the output terminal are in contact with the second fan-shaped electrode array;

the driving motor is used for driving the disc electrode to rotate around the central line of the disc electrode.

Optionally, the support plate further comprises an elastic pad located between the first friction part and the second friction part and the first support plate.

Optionally, the spray emission device comprises a plurality of emission spray heads, each emission spray head having a spray direction towards the receiving device.

Optionally, the emitter nozzle comprises a housing, a liner, a connection electrode and an emitter;

the shell is provided with an inner cavity and a spraying channel communicated with the inner cavity, and a spraying opening of the spraying channel is arranged towards the receiving device;

the inner container is positioned in the inner cavity and is used for storing liquid;

one end of the emitter extends into the inner cavity, and the other end of the emitter extends out of the shell from the injection channel;

the connecting electrode penetrates through the shell and the inner container, the part of the connecting electrode, which is positioned in the inner container, is in lap joint with the emitter, and the part of the connecting electrode, which is positioned outside the shell, is electrically connected with the output terminal of the functional power supply.

Optionally, the housing comprises a main body portion and a sealing cover, the sealing cover cooperating with an opposing surface of the main body portion to enclose the spray channel.

Optionally, the material of the emitter is a porous medium.

Optionally, the receiving device is a bionic fiber membrane, the bionic fiber membrane includes a plurality of sequentially stacked fiber layers, and the average fiber diameter and the average pore diameter of the plurality of fiber layers decrease sequentially along the direction in which the spray emission device points to the receiving device.

Optionally, at least one of the fiber layers is a conductive layer, and the conductive layer is electrically connected with an output terminal of the power supply.

Optionally, the materials of the plurality of fibrous layers are different.

Optionally, the receiving device further comprises a support for supporting the biomimetic fibrous membrane to deploy.

Optionally, the device further comprises a power-on adjusting device, wherein the power-on adjusting device comprises a switch unit, a communication unit and a control unit;

the switch unit is connected between the power supply and the emission nozzle of the spray emission device and between the power supply and the receiving device, and is used for controlling the connection and disconnection between the power supply and the spray emission device and the receiving device;

the switch unit is in signal connection with the control unit through the communication unit, and the control unit is used for controlling the switch-on and switch-off of the switch unit.

Drawings

Fig. 1 is a schematic structural diagram of a virtual olfaction generation system provided in an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a power supply provided in an embodiment of the present invention;

FIG. 3 is an exploded view of a spray emitting device provided in an embodiment of the present invention;

FIG. 4 is a cross-sectional view of a spray emitting device provided in an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a receiving apparatus according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a virtual olfaction generation device provided in an embodiment of the present invention.

Icon:

1-a face mask; 2-a spray emission device; 21-a transmitting nozzle; 211-a housing; 2111-main body portion; 2112-sealing cover; 212-inner container; 213-a transmitter; 214-connecting electrodes; 3-a receiving device; 31-a support; 32-biomimetic fibrous membranes; 321-a first fibre layer; 322-a second fibrous layer; 323-a third fibrous layer; 4-connecting rings; 5-a power supply; 51-a first support plate; 52-a second support plate; 53-disc electrode; 54-a first friction material portion; 55-a second friction material portion; 56-elastic cushion; 57-a conductive rod; 58-output terminal; 59-a drive motor; 61-a switching unit; 62-a communication unit; 63-a control unit.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, the present invention provides a virtual olfaction generation system, including:

a mask 1, the mask 1 being for covering the mouth and nose regions of a human face;

at least one spray emission device 2, the spray emission device 2 is fixed on the inner side of the face mask 1, and the spray emission device 2 can spray mist-shaped liquid drops in a power-on state;

the receiving device 3 is positioned at one side of the corresponding spray emission device 2 close to the face of a human body, the receiving device 3 is used for receiving the mist-like liquid drops sprayed by the spray emission device 2, and the receiving device 3 can accelerate the evaporation of the received liquid drops in a power-on state;

the power supply 5, and the output terminal 58 of the power supply 5 are electrically connected to the spray emitter 2 and the receiver 3.

The virtual olfactory generating system provided by the embodiment of the invention comprises a face mask 1, at least one spray transmitting device 2, at least one receiving device 3 and a power supply 5, wherein the face mask 1 can cover the mouth, nose and other areas of the face of a human body, the generated smell can be ensured to enter the nasal cavity of a user, an output terminal 58 of the power supply 5 is electrically connected with the spray transmitting device 2 and the receiving device 3, the power supply 5 can provide a high-voltage electric field for the spray transmitting device 2 and the receiving device 3, in the using process, the spray transmitting device 2 can spray atomized liquid drops in the electrified state, the characteristic of high transmission response speed is provided, the receiving device 3 receives the atomized liquid drops sprayed by the spray transmitting device 2, the evaporation of the liquid drops can be accelerated in the electrified state, the smell can be carried by the liquid drops, the smell can be rapidly diffused along with the rapid evaporation of the liquid drops, the rapid response and the rapid evaporation of the virtual olfactory generating system can be realized, in addition, the electric connection structure of the power supply 5, the spray transmitting device 2 and the receiving device 3 is easy to realize, the high compatibility is realized, the liquid atomization can reduce the occupied space of the system.

In particular, the embodiment of the invention realizes a virtual olfactory smell generation system based on self-powered and electrospray-electropromotion evaporation principles, and can enhance the immersive experience of the augmented reality. In the working process of the power supply 5, high-voltage electrostatic fields can be respectively arranged between the spray emission device 2 and the receiving device 3 and between the receiving device 3 and the skin on the outer surface of the nasal cavity (two chambers), so that the whole process is divided into two stages of electrospray and electrically-promoted evaporation, rich expression of smell can be realized by controlling the types of the sprayed liquid, and diversified olfactory information interaction between a virtual environment and a user is obtained. In the long run, the self-powered virtual olfactory smell generation system can bear the olfactory interactive work between an extended reality system and a user, and is expected to be widely applied to the fields of intelligent medical treatment, special protection and the like due to the excellent function expansion characteristic.

The virtual olfaction generation system can comprise two groups of spray emission devices 2 and receiving devices 3 which can be respectively arranged in the areas of the face mask 1 corresponding to the two sides of the nose. The mask 1 is a wearable mask 1, and the spray emitter 2 and the spray receiver 3 on the mask 1 can be arranged not to contact with the nose, so as to reduce the influence on the normal physiological activities of the human body to the maximum extent.

In the embodiment of the present invention, the power supply 5 may be a friction nano-generator. The friction nano generator is a self-driven device and has unique high-voltage and low-current output characteristics. Based on the continuous high-voltage output characteristic, the friction nano generator is successfully applied to the fields of micro plasma, electrostatic spinning, petroleum/water purification, air cleaning, electrostatic driving, electron field emission, electronic jet printing and the like. Compared with the traditional high-voltage power supply, the friction nano generator has the advantages of incomparable advantages in system integration of human body wearable equipment due to the characteristics of self-driving, portability, safety and the like.

Specifically, in the embodiment of the present invention, as shown in fig. 2, the friction nanogenerator may include a first support plate 51, a second support plate 52, a first friction material part 54, a second friction material part 55, a disc electrode 53, an output terminal 58, a conductive rod 57, and a driving motor 59; wherein the first support plate 51 and the second support plate 52 are oppositely arranged; the disc electrode 53 is positioned between the first support plate 51 and the second support plate 52, one side of the disc electrode 53 facing the first support plate 51 is provided with a first sector electrode array arranged around the central line of the disc electrode 53, one side of the disc electrode 53 facing the second support plate 52 is provided with a second sector electrode array arranged around the central line of the disc electrode 53, and the electrodes in the first sector electrode array are arranged in a staggered way with the electrodes in the second sector electrode array; the first friction part and the second friction part are positioned on one side of the first supporting plate 51 facing the disc electrode 53, and the charging polarities of the first friction part and the second friction part are opposite; the conducting rod 57 and the output terminal 58 are positioned on the side of the second support plate 52 away from the first support plate 51, and the conducting rod 57 and the output terminal 58 are in contact with the second fan-shaped electrode array; a drive motor 59 may be used to drive the disc electrode 53 to rotate about its centerline.

The friction nano generator with the structure is an ultrafast voltage boosting TENG (UVE-TENG) structure, can provide a high-voltage electrostatic field, and adopts the principle of charge accumulation to ensure the stability of output through continuous rotation.

The first support frame and the second support frame can be made of acrylic (PMMA) materials, and the stability of the structure of the working device of the friction nano generator can be protected.

The materials of the first friction material part 54 and the second friction material part 55 may be polyimide (kapton) and nylon, respectively, or may be other materials, which is not limited herein. The first friction material part 54 and the second friction material part 55 may be disposed opposite to each other in the radial direction of the disc electrode 53.

The first fan electrode array and the second fan electrode array on the disk electrode 53 may have the same structure, except that the electrodes in the first fan electrode array and the electrodes in the second fan electrode array are angularly offset. For example, the first fan electrode array and the second fan electrode array may be each a fan array in which 30 fan electrodes are arranged with a central angle of 5 degrees.

The conducting rod 57 and the output terminal 58 are located above the disk electrode 53 and keep good contact with the disk upper electrode array, so as to ensure reliable charge transfer and transmission.

The driving motor 59 may be a brushless electrode, and the disc electrode 53 may be driven to operate at a high speed, for example, when the internal rotor speed of the driving motor 59 is 1200rpm, the output voltage of the power supply 5 may reach 8kV. When the disk electrode 53 rotates clockwise, the first fan-shaped electrode array will rub against the first friction material part 54 and the second friction material part 55 respectively, and the surface charge density of the dielectric layer will be maintained in a saturated state due to the triboelectrification and charge transfer between the first friction material part 54 and the second friction material part 55 (dielectric layer) and the first fan-shaped electrode array, which is called a tribo-self-excitation process. Meanwhile, due to the misalignment between the second sector electrode array and the first sector electrode array on the disk electrode 53, the charges on the first sector electrode array do not have much influence on the charges on the second sector electrode array.

The inventors of the present application have studied the voltage output mechanism of the above-mentioned triboelectric nanogenerator with two opposing electrodes a and B in the second fan-shaped electrode array as objects of study. The electrification process of the above-described friction nanogenerator can be divided into 4 stages according to the principle of contact electrification and the charge transfer characteristics. When the disc electrode 53 rotates clockwise and the electrodes a and B do not enter the areas where the first friction material part 54 and the second friction material part 55 are located, the first stage is performed, at this time, the electrodes a and B are not in contact with the conductive rod 57, and the friction nanogenerator does not output voltage. In the second stage, the electrodes a and B rotate to above the first friction material portion 54 and the second friction material portion 55 respectively, and negative charges and positive charges are induced on the electrodes a and B respectively due to electrostatic induction, so that the conductive rod 57 can move directionally to reach an electrostatic equilibrium state. When in the third stage, the conductive rod 57 is in the gap between the electrodes, and the charge on electrodes a and B will continue to be retained while new induced charge will accumulate on subsequent electrodes. In the fourth stage, as the disk electrode 53 continues to rotate, the electrodes a and B come into contact with the output terminal 58, and the surface charges thereof are output to the outside to form a voltage output in an external circuit.

Specifically, as shown in fig. 2, the friction nanogenerator further includes an elastic pad 56, the elastic pad 56 is located between the first friction part and the second friction part and the first support plate 51, and the elastic pad 56 is laid below the first friction part and the second friction part, so that sufficient contact between the first sector electrode array on the disc electrode 53 and the first friction part and the second friction part can be ensured. The material of the elastic pad 56 may be a sponge material, or may be other materials, which is not limited herein.

In an embodiment of the present invention, the spray emitter 2 may include a plurality of emitters 21, and each emitter 21 may emit a spray in a direction toward the receiver 3. The plurality of emitter nozzles 21 can emit mist-like liquid droplets of different odors.

In particular, the spray emitter 2 may be a 4-channel electrospray device, i.e. having 4 emitter nozzles 21, and the spray emitter 2 may be connected to the mask 1 by a connection ring 4.

The function of the Virtual Olfactory Generation (VOG) system is realized by combining Electrospray (ES) and Electrostatic Field Induced Evaporation (EFIE) technologies, and the generation, mixing and diffusion of different odors can be accurately controlled. Meanwhile, the ES and EFIE devices are both driven by an ultra-fast voltage boost TENG (UVE-TENG) with charge accumulation principle, while mixing different smells using the multi-channel spray emission device 2. Due to the high voltage and low current characteristics of UVE-TENG, the high voltage output it produces does not harm personal safety. By controlling the type of the sprayed essence water solution, the abundant expression of smell can be realized, so that diversified olfactory information interaction between the virtual environment and the user is obtained.

Specifically, as shown in fig. 3 and 4, the above-mentioned emitter nozzle 21 may include a housing 211, a liner 212, a connection electrode 214, and an emitter 213; the housing 211 has an inner cavity and a jet channel communicating with the inner cavity, the jet orifice of the jet channel being arranged towards the receiving means 3; the inner container 212 is positioned in the inner cavity, and the inner container 212 is used for storing liquid; one end of the emitter 213 extends into the inner cavity and the other end extends out of the housing 211 from the injection channel; the connection electrode 214 penetrates the case 211 and the inner container 212, a portion of the connection electrode 214 located inside the inner container 212 is overlapped with the transmitter 213, and a portion of the connection electrode 214 located outside the case 211 is electrically connected to the output terminal 58 of the functional power supply.

The material of the housing 211 may be resin, and the housing 211 may be manufactured by a 3D printing process.

Specifically, the housing 211 may include a body portion 2111 and a seal cover 2112, the seal cover 2112 cooperating with an opposing surface of the body portion 2111 to define a spray channel.

Specifically, the inner container 212 may store 0.1-0.5mL of solution at a time, while the liquid stored therein can overcome the influence of gravity.

In particular, the emitter 213 plays a decisive role in the spraying and atomization of the liquid during the spraying with the emitter nozzle 21 towards the receiving device 3, and the material of the emitter 213 may be a porous medium. The material of the emitter 213 may be polypropylene-polytetrafluoroethylene (PP-PTFE) which is composed of a PP coarse fiber skeleton and overlying PTFE fibers. Inspired by capillary effect and microfluidics, a porous media based spray emitter 213 is used to generate atomized droplets with self-regulated liquid supply, easy to integrate design, and easy to multiplex.

The spray emission device 2 can realize relatively uniform atomization effect of droplet diameter in micrometer or even nanometer range in a certain range by applying electrospray liquid atomization technology. Under the combined action of surface tension and electric stress, the meniscus of the liquid at the tip of the emitter 213 in the emitting nozzle 21 of the spray emitting device 2 forms a taylor cone and emits a liquid jet flow with a micro-nano scale at the cone tip, and then the liquid jet flow is split into atomized liquid drops due to rayleigh instability.

In practical applications, in the emitting nozzle 21, due to the wicking effect, the liquid with a special smell stored in the inner container 212 is collected to the tip of the emitter 213, and then the liquid on the tip is ejected under the action of the high-voltage electrostatic field, the initial droplet size at the tip of the emitter 213 is in the micrometer range, and the liquid volume for one ejection can be between 0.5-1 μ L. The volume of the spray from the generator tip can be about 0.5-1 mul within 10s, whereby the spray emitting device 2 can be designed to achieve a spray rate of 0.05-0.1 mul/s. It should be noted that the angle of the tip of the emitter 213 also has some effect on the final spray area.

In the embodiment of the present invention, in order to ensure that the sprayed mist-like liquid droplets can be rapidly evaporated, and inspired by the plant transpiration, the receiving device 3 may be a bionic fiber membrane 32, so as to improve the phase change efficiency of the mist-like liquid droplets. The bionic fiber membrane 32 comprises a plurality of layers of sequentially stacked fiber layers, the average fiber diameter and the average pore diameter of the plurality of layers of fiber layers are sequentially reduced along the direction of the spray emission device 2 pointing to the receiving device 3, and the plurality of layers of fiber layers are well combined, so that the transmission resistance at the interface of the membrane can be effectively reduced. Compared with the traditional single-layer quick-drying material, the prepared bionic fiber membrane 32 material has the excellent characteristics of fast liquid drop absorption, self-driven directional water delivery and the like.

Specifically, as shown in fig. 5, the biomimetic fiber membrane 32 may include a first fiber layer 321, a second fiber layer 322, and a third fiber layer 323, which are sequentially stacked, wherein the pore size distribution of the three fiber layers follows the law of morley, the average fiber diameter of the first fiber layer 321 may be 20 μm, the average pore size may be 100 μm (large pore), and larger than the second fiber layer 322 (micron-sized pore, average fiber diameter of 250nm, and average pore size of 1.5 μm) and the third fiber layer 323 (submicron-sized pore, average fiber diameter of 120nm, and average pore size of 700 nm). It can be seen that the fiber diameters and pore diameters of the three different fiber layer materials are gradually reduced, and the distribution characteristics of the macroscopic pores, the micron pores and the submicron pores ensure the directional transmission effect of the liquid drops. First fibrous layer 321, second fibrous layer 322, and third fibrous layer 323 are all films.

Specifically, the materials of the above-described multiple fiber layers are different. For example, the material of the first fiber layer 321 may be PP-SBNF, the material of the second fiber layer 322 may be PAN-CFM, and the material of the third fiber layer 323 may be PVDF-FM.

In the embodiment of the present invention, at least one of the plurality of fiber layers is a conductive layer, and the conductive layer is electrically connected to the output terminal 58 of the power supply 5. For example, the second fiber layer 322 is a conductive film as a conductive layer, and thus, the second fiber layer 322 can also be used as an electrode in Electrospray (ES) and Electrostatic Field Induced Evaporation (EFIE) processes. The introduction of electric field force on the bionic fiber membrane 32 polarizes water dipoles, affects the translation and vibration modes at the same time, effectively reduces the free energy barrier of water evaporation, and thus increases the flux of evaporated water molecules.

In the above-described receiving device 3, the ejected liquid droplets rapidly penetrate to the other side due to the difference in surface energy of the fiber layers of the receiving device 3, and finally spread completely on the other side. Whereas the liquid on the receiving means 3 evaporates rapidly due to the high voltage electrostatic field enhancing the conditioning of the interfacial water molecules, whereby the scent is rapidly diffused to be received by the scent receptors in the nasal cavity.

In practical application, water drops with a volume of 15uL fall on the bionic fiber membrane 32, and then the water drops start to rapidly permeate, expand and evaporate under the action of Laplace force, the total evaporation process takes 245s, and the good quick-drying characteristic of the bionic fiber membrane is shown. The electrostatic field applied between the receiving means 3 and the nasal cavity has a significant promoting effect on the evaporation of the liquid on the receiving means 3. The required evaporation time increases gradually as the volume of liquid on the receiving means 3 increases, but the two are not strictly linear. When the external voltage is 5kV and the distance between the electrodes is 5mm, the highest water evaporation rate can reach 0.43g/h under the action of a high-voltage electrostatic field.

In the embodiment of the present invention, the receiving device 3 further includes a supporting member 31, and the supporting member 31 may be configured to support the biomimetic fiber membrane 32 to be unfolded, so as to facilitate the setting of the biomimetic fiber membrane 32.

In an embodiment of the present invention, the virtual olfaction generation system may further include an energization adjusting device, which can control a spraying process of the plurality of emission nozzles 21, specifically, as shown in fig. 6, the energization adjusting device may include a switch unit 61, a communication unit 62, and a control unit 63; wherein, the switch unit 61 is connected between the power supply 5 and the emission nozzle 21 of the spray emission device 2 and between the power supply 5 and the receiving device 3, and the switch unit is used for controlling the connection between the power supply 5 and the emission nozzle 21 and the receiving device 3 of the spray emission device 2; the switch unit is in signal connection with the control unit through the communication unit, and the control unit is used for controlling the on and off of the switch unit.

The switch unit can be a reed switch relay, the controllable switch voltage of the reed switch relay can reach 20kV, the electric capacitor is 2pF, the contact resistance is 120-150M omega, and the closing time and the releasing time of the two contacts are respectively 4ms and 2ms. The reed switch relay does not have great influence on the electrical parameters of the reed switch relay in the process of controlling the on-off of the power supply 5.

The communication unit can be WIFI wireless communication, and the opening and closing of the external magnetic field of the reed switch relay are controlled by means of the WIFI wireless communication.

The control unit can be an intelligent mobile device, can regulate and control the spray emission device 2, and can reserve a communication interface to realize virtual world scene sharing and interaction by means of a cloud communication platform.

The virtual olfactory smell generation system further improves communication between the virtual digital world and the real world, and enhances immersive and interactive experience of the augmented reality user. Meanwhile, the work also has potential application value in the aspects of auxiliary respiration, nasal administration and the like.

The inventor of the present application can test the jetting effect of the virtual olfaction generation system. Specifically, the ejection effect of driving 4 ejection heads 21 in the spray emitter 2 by the power supply 5 was tested, while the ejection area showed a tendency to rise as the driving voltage increased, verifying the feasibility of controlling the ejection volume by voltage. Further, the influence of the distance between the plurality of emission nozzles 21 and the receiving device 3 on the spray area under the driving of the high voltage electrostatic field was verified, and it can be seen that there is an optimum working distance for the effect of the spray emission device 2 (in the experiment, when the electrostatic voltage applied to the 4 channels is 10kV, the optimum working distance is in the vicinity of 6 mm). This is because when the distance is too far, the ejected droplets evaporate too quickly, and when the distance is too close, a weak current therebetween is unavoidable, thereby reducing the energy for driving the spray-emitting device 2. The friction nano generator is used as a high-voltage source, similar driving effects can be achieved for different numbers of the emission nozzles 21, and the reliability of TENG high-voltage source driving is proved. On the other hand, the evaporation effect of the liquid in the 4 regions of the receiving device 3 in the multi-channel operation mode was examined, and since the spatial positions of the ball electrodes on the outer surface of the nasal cavity are not completely symmetrical with respect to the 4 regions, there was a difference in the evaporation time of the liquid in the 4 regions, but there was a uniformity in the response to the voltage enhancement. The method can be completely realized by controlling 4 channels of electric spray by using the mobile equipment, when the channels 1, 2, 3 and 4 are sequentially pressed down on a mobile phone interface, the liquid carried by each channel sequentially appears on the receiving device 3, and the response speed of the electric spray is related to the WIFI signal intensity and the transmission distance. The interaction between the VOG system and the user was further tested and the results showed that the user could feel the change in odor in about 3 seconds on average during the operation of the whole system. The result is consistent with a single-channel test result, and the reliability of the system operation in a multi-channel state is shown. The integrated design of electrospray-electroenhanced evaporation ensures that the scent can be rapidly released to be received by the receptor cells in the nasal cavity, indicating the great potential of the virtual olfactory scent generation system in practical use.

In the virtual olfaction generation system provided by the embodiment of the invention, the whole spray emission device 2 and the whole receiving device 3 are driven by the high-voltage electrostatic field, and the on-off and the strength of the high-voltage electrostatic field are main control parameters, so that the generation, mixing and diffusion processes of smells can be accurately adjusted by changing the rotating speed of the friction nano generator (TENG) and controlling the state of the multi-channel switch unit. Specifically, the virtual olfaction generation system works in such a way that gas molecules existing in the spray emission device 2 enter the nasal cavity of the human body finally in three stages of electrospray, transmission and spreading on the bionic fiber film and electrostatic field induced evaporation.

It will be apparent to those skilled in the art that various changes and modifications may be made in the embodiments of the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A virtual olfaction generation system, comprising:

a mask for covering the mouth and nose regions of a human face;

the receiving device is positioned on one side of the corresponding spray emission device close to the face of a human body and is used for receiving the atomized liquid drops sprayed by the spray emission device, and the receiving device can accelerate the evaporation of the received liquid drops in a power-on state;

2. The virtual olfactory generation system of claim 1 wherein the power supply is a triboelectric nanogenerator.

3. The virtual olfaction generation system according to claim 2, wherein the friction nano-generator includes a first support plate, a second support plate, a first friction material portion, a second friction material portion, a disk electrode, an output terminal, a conductive rod, and a driving motor;

the disc electrode is positioned between the first support plate and the second support plate, a first sector electrode array arranged around the central line of the disc electrode is arranged on one side of the disc electrode facing the first support plate, a second sector electrode array arranged around the central line of the disc electrode is arranged on one side of the disc electrode facing the second support plate, and electrodes in the first sector electrode array and electrodes in the second sector electrode array are arranged in a staggered mode;

4. The virtual olfactory generating system of claim 3 further comprising resilient pads between the first and second friction members and the first support plate.

5. The virtual olfactory generating system of any of claims 1-4 wherein the spray emitting device includes a plurality of emitting jets, each emitting jet having a direction of emission directed toward the receiving device.

6. The virtual olfactory generating system of claim 5 wherein the transmitting spray head includes a housing, a bladder, a connecting electrode, and a transmitter;

one end of the emitter extends into the inner cavity, and the other end of the emitter extends out of the shell from the spraying channel;

7. The virtual olfactory generating system of claim 6 wherein the housing includes a body portion and a sealing cover that cooperates with an opposing surface of the body portion to enclose the spray channel.

8. The virtual olfactory generating system of claim 6 wherein the emitter material is a porous media.

9. The virtual olfactory generating system of any of claims 1-4 wherein the receiving means is a biomimetic fiber membrane comprising a plurality of sequentially stacked layers of fibers, the layers of fibers having sequentially decreasing average fiber diameters and average pore sizes in a direction from the spray emitting means toward the receiving means.

10. The virtual olfactory generation system of claim 9 wherein at least one of the plurality of fibrous layers is a conductive layer that is electrically connected to an output terminal of the power supply.

11. The virtual olfactory generating system of claim 9 wherein the fibrous layers are of different materials.

12. The virtual olfactory generating system of claim 9 wherein the receiving means further includes a support for supporting deployment of the biomimetic fibrous membrane.

13. The virtual olfaction generation system according to claim 1, further comprising a power-on adjustment device including a switch unit, a communication unit, and a control unit;

the switch unit is connected between the power supply and the transmitting nozzle of the spray transmitting device and between the power supply and the receiving device, and is used for controlling the connection and disconnection between the power supply and the spray transmitting device and the receiving device;