CN111631702A

CN111631702A - Ear muff device is measured to flexible rhythm of heart of pleasant formula based on polymer sensor

Info

Publication number: CN111631702A
Application number: CN202010496143.1A
Authority: CN
Inventors: 朱子才; 苏春; 卞长生
Original assignee: Xian Jiaotong University; Shaanxi Normal University
Current assignee: Xian Jiaotong University; Shaanxi Normal University
Priority date: 2020-06-03
Filing date: 2020-06-03
Publication date: 2020-09-08

Abstract

The invention discloses an in-ear flexible heart rate measuring earmuff device based on a polymer sensor, which comprises a flexible earmuff with a flexible polymer pressure sensor, wherein the flexible earmuff is sleeved on an earphone upper cover structure, the earphone upper cover structure is connected with an earphone lower cover structure, a micro-control circuit, a sensor measuring circuit, a power module and a Bluetooth module which are mutually connected are arranged between the earphone upper cover structure and the earphone lower cover structure, the flexible earmuff is in contact with blood vessels in ears for monitoring the heart rate in the exercise process, an electric response signal is sent to the micro-control circuit through the sensor measuring circuit, and the micro-control circuit sends a mobile terminal for displaying through the Bluetooth module. The invention can effectively monitor the heart rate change of the human body by measuring the pulsating pressure of the auditory canal blood vessels based on the polymer sensor, has simple test principle and power saving, and hardly increases the structural complexity and the quality of the earphone.

Description

Ear muff device is measured to flexible rhythm of heart of pleasant formula based on polymer sensor

Technical Field

The invention belongs to the technical field of heart rate measurement, and particularly relates to an in-ear flexible heart rate measurement earcap device based on a polymer sensor.

Background

With the improvement of living standard, people pay more and more attention to their health, and the sports are popular with more and more people. The heart rate is the most effective standard for measuring the exercise effect and controlling the exercise amount, the intervals of fat burning, heart and lung exercise and peak exercise can be provided for the user, the data can help the exercise to be more scientific, and meanwhile, the heart rate has a certain evaluation effect on the long-term exercise effect of the user. Therefore, heart rate measurement is the most basic and key monitoring index of the existing wearable sports equipment.

In the heart rate monitoring field, the most accurate is the heart rate area at present, but because the wearing effect is not good, influence the impression, do not receive extensive concern, the substitute is all kinds of bracelets and wrist-watch. However, the accuracy of heart rate measurement of various bracelet and watch products seriously depends on the wearing condition of the user, and if the user wears loosely, the heart rate module cannot be attached to the skin, which can result in inaccurate heart rate measurement. Especially, in the process of movement, arm movement brings some uncertain influences on the wearing state, and further influences the measurement accuracy.

Compared with the wrist, the area beside the ear is an ideal place for testing various body parameters, the internal carotid artery system runs vertically along the ear canal area, and the capillary blood vessel system runs through the tragus and the earlobe. The ear position, particularly in the ear, is relatively stable and does not move too vigorously during the daily activities of people, which makes it an ideal and stable test platform. Therefore, the intra-aural heart rate measurement has higher accuracy.

There are some commercial earphone products for measuring heart rate in ear, which mainly use photoelectric method to monitor heart rate, and the method is widely used in wrist-ring and watch heart rate measuring devices. The principle is that the reflection value of the skin, the bone, the muscle, the fat and the like of the human body to the light is a fixed value, and the capillary vessels, the artery and the vein are continuously increased and decreased along with the pulse volume, so the reflection value to the light is a fluctuation value which is exactly consistent with the heart rate, and the photoelectric volume method determines the heart rate data of the user by the frequency of the fluctuation. The technical scheme of the method is mature, the price is relatively low, but the method has some defects, such as fast power consumption, influence on the endurance of the intelligent wearable device, and easily interfered by ambient light or the skin surface to cause errors of heart rate data.

In recent years, along with the rapid development of wearing technology, more flexible pressure polymer materials appear, and experiments prove that physiological parameters such as heart rate, breathing rhythm and the like can be measured by wearing the pressure polymer materials on the wrist, the throat and the chest, but no related devices or assumptions for in-ear measurement exist. The invention provides an ear muff device for manufacturing an in-ear type flexible heart rate measurement by using a flexible polymer pressure sensor, which has the advantages of simple test principle, electricity saving, almost no increase of the structural complexity and quality of an earphone and important popularization value.

Disclosure of Invention

The invention aims to solve the technical problem of providing an ear-in type flexible heart rate measuring earcap device based on a polymer sensor, aiming at the defects in the prior art, and accurately measuring the heart rate by sensing the pulsating pressure of blood vessels in ears.

The invention adopts the following technical scheme:

the utility model provides an earmuff device is measured to flexible rhythm of heart of pleasant formula based on polymer sensor, which comprises a body, the body is including the flexible earmuff of taking flexible polymer pressure sensor, flexible earmuff suit is structural at earphone upper cover, earphone upper cover structure and earphone lower cover structural connection, be provided with interconnect's microcontroller between earphone upper cover structure and the earphone lower cover structure, sensor measuring circuit, power module and bluetooth module, flexible earmuff contact intra-aural blood vessel is arranged in the rhythm of the heart monitoring of motion in-process, sensor measuring circuit can send electric response signal to microcontroller, microcontroller sends mobile terminal through bluetooth module and is used for showing.

Specifically, flexible earmuff includes outer fringe cap and interior sleeve pipe, and interior sleeve pipe setting is provided with flexible earmuff inner tube surface electrode in the center of outer fringe cap respectively with the step surface in the interior sleeve pipe bottom surface, and the interval sets up between two flexible earmuff inner tube surface electrodes.

Furthermore, the side surface of a ring at the top end of the sound outlet pipe of the upper cover structure of the earphone and the surface of a step under the necking are respectively provided with an external electrode of the sound outlet pipe, and the external electrodes of the two sound outlet pipes are arranged at intervals and are respectively connected with a sensor measuring circuit through electrode leads.

Furthermore, the inner sleeve is buckled with the sound outlet pipe of the upper cover structure of the earphone, and the external electrode of the sound outlet pipe is ensured to be effectively contacted by the elastic force of the flexible earmuff.

Further, the surface of the outer edge cap is entirely coated with an insulating protective layer.

Specifically, the flexible polymer pressure sensor is made of an active flexible polymer pressure sensing material, the active flexible polymer pressure sensing material comprises an ionic polymer, a composite ionic polymer material or a piezoelectric polymer, and a diaphragm-shaped pressure sensor with an ionic polymer/composite ionic polymer surface structure, a flexible earmuff-shaped integrated pressure sensor or a diaphragm-shaped pressure sensor without an ionic polymer/composite ionic polymer surface structure is made to serve as a flexible earmuff; the diaphragm-shaped pressure sensor is of a strip structure or an arc structure and is arranged along the circumferential direction or the radial direction of the surface of the outer edge cap of the flexible earmuff.

Further, the ionomer/polyion has a surface structure of a channel-type microstructure or a mesa-type microstructure.

Specifically, the flexible polymer pressure sensor is made of a passive polymer pressure sensing material and comprises a resistance-type polymer pressure sensor and/or a capacitance-type polymer pressure sensor, wherein an arc-shaped diaphragm pressure sensor without a surface structure, a flexible earmuff-shaped integrated pressure sensor, a diaphragm pressure sensor with a surface structure or an earplug pressure sensor with a surface structure are made to serve as the flexible earmuff, the diaphragm pressure sensor is of a long strip structure or an arc structure and is arranged along the circumferential direction or the radial direction of the surface of an outer edge cap of the flexible earmuff.

Further, the surface structure is a channel-shaped microstructure, a mesa-shaped microstructure, a pyramid-shaped microstructure or a columnar microstructure.

Compared with the prior art, the invention has at least the following beneficial effects:

the in-ear flexible heart rate measuring earcap device based on the polymer sensor can sense the pulse of blood vessels in an ear canal and measure the heart rate condition of a human body in real time, so that the heart rate health condition of a user can be known, and the abnormal heart rate state can be warned in time.

Further, the flexible ear muff can be adapted to the shape of the human ear canal freely, while the surface can be provided with electrodes for sensing heart rate signals.

Furthermore, the sound tube external electrode can transmit the heart rate signal to the measuring circuit. The round platform structure can conveniently disassemble the flexible earmuff while ensuring accurate circuit connection.

Furthermore, the insulating protective layer can effectively protect the measuring signal from being influenced by external human charges, the accuracy of the heart rate signal is guaranteed, and the wearing comfort of the flexible earmuff is improved.

Furthermore, the flexible polymer pressure sensor is made of active flexible polymer pressure sensing materials, and can directly generate electric signals in the materials when sensing the pulsation of blood vessels in the auditory canal, so that real-time heart rate signals are formed.

Further, the surface structure of the sensor may further improve the sensor sensitivity against the influence of the ear canal blood vessel pulsation.

Furthermore, the flexible polymer pressure sensor is made of a passive polymer pressure sensing material, so that the change of material detaching characteristics can be caused when the blood vessel pulsation of the auditory canal is sensed, and a real-time heart rate signal can be obtained by measuring the material characteristics.

Furthermore, the arrangement of the surface structure can further amplify the change of the characteristics of the ear canal blood vessel pulsation aiming at the influence of the ear canal blood vessel pulsation, thereby improving the sensitivity of the sensor.

In conclusion, the invention can effectively monitor the heart rate change of the human body by measuring the pulsating pressure of the auditory canal blood vessels based on the polymer sensor, has simple test principle and power saving, and hardly increases the structural complexity and the quality of the earphone.

The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.

Drawings

FIG. 1 is a view showing a structure of a body in which (a) is an integral structure and (b) is an exploded view of components;

FIG. 2 is a schematic view of the overall structure of a flexible earmuff;

FIG. 3 is a schematic diagram of a flexible earcap formed by casting a film of an ionomer/composite ionomer material, wherein (a) is of a type without a surface structure, (b) is of a type with a surface structure, and (c) is of a different surface microstructure type;

FIG. 4 is a schematic view of a flexible earmuff of any polymer diaphragm pressure sensor, wherein (a) is circumferentially disposed and (b) is radially disposed;

FIG. 5 is a diagram of a passive polymer pressure sensor die formed flexible earmuff wherein (a) is of the type without a surface structure, (b) is of the type with a surface structure, and (c) is of a different surface microstructure type;

FIG. 6 is a schematic diagram of a flexible earmuff for a microstructured diaphragm-type polymer pressure sensor, wherein (a) is circumferentially disposed and (b) is radially disposed;

FIG. 7 illustrates a flexible earcap sensor electrode and package, wherein (a) is a flexible earcap containing a sensor, (b) is an electrode interface arrangement, and (c) is a protective packaging layer;

fig. 8 is a schematic view of an electrode interface between a flexible ear cap and a sound outlet tube, wherein (a) is an electrode arrangement on the sound outlet tube, (b) is an electrode connection sectional view, and (c) is an electrode contact sectional view;

FIG. 9 is a diagram of an electrical quantity measuring circuit of an active polymer pressure sensor, wherein (a) is a current measuring circuit and (b) is a charge measuring circuit;

FIG. 10 is an electrical parameter measuring circuit for a passive polymer pressure sensor, wherein (a) is a bridge measuring circuit and (b) is a constant current source measuring circuit.

Wherein: 1. a body; 11. a flexible ear cap; 12. an earphone upper cover structure; 13. a horn; 14. a sensor measurement circuit; 15. a power supply module; 16. a Bluetooth module; 17. a micro control circuit; 18. a lower cover structure of the earphone; 111. an inner sleeve; 112. a peripheral cap; 21. the ionic polymer/composite ionic polymer has no surface structure; 22. the ionic polymer/composite ionic polymer has a surface structure; 221. a channel-type microstructure; 222. a mesa-shaped microstructure; 223. a pyramid-shaped microstructure; 32. a diaphragm-like pressure sensor; 41. the passive polymer has no surface structure; 42. the passive polymer has a surface structure; 424. a columnar microstructure; 61. the inner tube and outer surface electrodes of the flexible earmuff; 62. an insulating protective layer; 71. an external electrode of the sound outlet pipe; 81. a feedback resistor; 82. an operational amplifier; 83. a feedback capacitance; 91. a sensor equivalent impedance; 92. bridge arm resistance.

Detailed Description

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "one side", "one end", "one side", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The invention provides an in-ear flexible heart rate measuring earcap device based on a polymer sensor, which adopts the technical modes of solution film casting, crosslinking or hot pressing and the like to form an integrated flexible earcap, or is made into a diaphragm-shaped sensor which is embedded in or attached to the surface of a flexible silica gel earplug to form an in-ear contact type heart rate sensor. Through the conversion of the sensor measuring circuit, the electric signal of heart rate response is processed by the micro control circuit and is sent to the terminal equipment through the Bluetooth module, and the heart rate information is analyzed and displayed. The invention has high accuracy of measuring the heart rate, is convenient to wear and has higher popularization and application values.

Referring to fig. 1, the present invention relates to an in-ear flexible heart rate measuring earcap device based on a polymer sensor, which includes a body 1, wherein the body 1 includes a flexible earcap 11 with a flexible polymer pressure sensor, an upper cover structure 12 of an earphone, and a lower cover structure 18 of the earphone.

The flexible earmuff 11 with the flexible polymer pressure sensor is sleeved on the earphone upper cover structure 12, the earphone upper cover structure 12 is connected with the earphone lower cover structure 18 to form an internal installation space, a micro control circuit 17 which is connected with each other is arranged in the internal installation space, a loudspeaker 13, a sensor measuring circuit 14, a power supply module 15 and a Bluetooth module 16, the flexible earmuff 11 with the flexible polymer pressure sensor is in contact with blood vessels in ears and used for accurately monitoring the heart rate in the motion process, the blood vessel pulsation of a human in the ears under the static or motion state is measured through the flexible polymer pressure sensor, an electric response signal enters the micro control circuit 17 through the sensor measuring circuit 14 to be processed, and is sent to mobile Bluetooth terminals such as a mobile phone and an iPad through the Bluetooth module 16, and the heart rate information is analyzed.

Referring to fig. 2, 7 and 8, the flexible ear cap 11 includes an outer cap 112 and an inner sleeve 111, the inner sleeve 111 is disposed at the center of the outer cap 112, the inner and outer electrodes 61 of the inner tube of the flexible ear cap are distributed on the bottom surface and the step surface of the inner sleeve 111, and a sufficient gap is left between the inner and outer electrodes 61 of the inner tube of the two flexible ear caps to prevent short circuit; and an insulating protective layer 62 is entirely coated on the surface of the outer cap 112 for protection and improvement of wearing comfort of the flexible earmuff.

Referring to fig. 8, an electrode interface is disposed on the sound outlet tube of the earphone upper cover structure 12, the positions of the outer electrodes 71 of the sound outlet tube are respectively located on the side surface of the ring at the top end of the sound outlet tube and the surface of the step below the neck, a sufficient gap is left between the two outer electrodes 71 of the sound outlet tube to prevent short circuit, and the two outer electrodes 71 of the sound outlet tube are connected to the sensor measuring circuit 14 through electrode leads; when the inner sleeve 111 is fastened with the sound outlet tube of the earphone upper cover structure 12, the elastic force of the flexible ear cap ensures that the outer electrode 71 of the sound outlet tube is effectively contacted.

The sensor measuring circuit 14 includes two categories according to different principles of the flexible polymerization pressure sensor, one is that the electric quantity measuring circuit measures voltage, current or charge and the like, and is suitable for an active polymer pressure sensor; the other type is that the electrical parameter measuring circuit measures resistance or capacitance and the like, and is suitable for passive polymer pressure sensors.

All types of polymer pressure sensing materials can be made into a non-structural diaphragm shape, or made into a diaphragm-shaped pressure sensor with microstructures (except piezoelectric polymers and piezoelectric electret polymers) with different upper and lower surface areas, wherein the microstructures are a channel-type microstructure 221, a mesa-type microstructure 222, a pyramid-type microstructure 223 and a columnar microstructure 424.

The membrane is in a strip film or arc film structure and is attached or embedded in the silica gel flexible earmuff 11 along the circumferential direction or the radial direction of the outer edge cap 112.

The sensing materials used in flexible polymer pressure sensors include both active flexible polymer pressure sensing materials and passive polymeric pressure sensing materials.

According to different flexible polymer pressure sensing principles and material characteristics, different sensing structures (whether surface microstructures are provided) and installation forms (diaphragm distributed installation or integrated sensor) and forming processes (solution casting, cross-linking forming and hot-press forming) are selected to obtain different forms of flexible earmuffs 11.

Referring to fig. 3 and 4, the active flexible polymer pressure sensing material includes an ionomer and/or a composite ionomer material, and is made into a diaphragm-shaped pressure sensor 32 with an ionomer/composite ionomer surface structure 22, or is made into a flexible earmuff-shaped integrated pressure sensor as the flexible earmuff 11; the diaphragm-like pressure sensor 32 is of an arc-shaped structure; to improve the sensitivity of the sensor, the ionomer/polyion has a surface structure 22 that is either a channel-type microstructure 221 or a mesa-type microstructure 222.

Referring to fig. 4, the active flexible polymer pressure sensing material further includes a piezoelectric polymer, a piezoelectric electret polymer, and a diaphragm-like pressure sensor 32 for forming the ionomer/polyion non-surface structure 21 as the flexible earmuff 11.

Wherein the diaphragm pressure sensor 32 is disposed circumferentially or radially along the surface of the outer peripheral cap 112.

Referring to fig. 5, the passive flexible polymer pressure sensing material includes a resistive polymer pressure sensor and/or a capacitive polymer pressure sensor, and is made into an arc-shaped diaphragm pressure sensor 32 without a surface structure 41, or is made into a flexible earmuff-shaped integrated pressure sensor; in order to improve the sensitivity of the sensor, the diaphragm-shaped pressure sensor 32 or the earplug-shaped pressure sensor with the surface structure 42 is manufactured to be used as the flexible earcap 11, and the surface structure 42 is a track-shaped microstructure 221, a platform-shaped microstructure 222, a pyramid-shaped microstructure 223 or a columnar microstructure 424.

Referring to FIG. 6, the diaphragm pressure sensor 32 is disposed circumferentially or radially along the surface of the peripheral cap 112.

The material of the flexible polymer pressure sensor is, for example, a polymer formed by solution volatilization, such as an ionic polymer, a composite ionic polymer material, PVC gel, a thermoplastic polyurethane elastomer doped with conductive particles, and the like, or a cross-linked polymer, such as silicone rubber doped with conductive particles, silicone rubber for a capacitive sensor, and the like. A flexible earmuff structure mold is designed, a flexible sensor in the shape of an earplug is formed by solution casting, and in order to improve the sensitivity of the sensor, the mold is improved, and the flexible polymer pressure sensor in the shape of the earplug with microstructures with different upper and lower surface areas such as a channel, a table shape or a cone shape is cast.

The material of the flexible polymer pressure sensor is thermoplastic polymer, such as thermoplastic polyurethane elastomer doped with conductive particles. The flexible earmuff structure mold is designed, the flexible sensor in the shape of the earplug is manufactured through hot press molding, and in order to improve the sensitivity of the sensor, the mold is improved, and the flexible polymer pressure sensor in the shape of the earplug with the channel, the table shape, the cone shape or the column shape and other microstructures is cast.

Different active flexible polymer pressure sensors select different electric quantity measuring circuits, and piezoelectric polymer and piezoelectric electret polymer sensors adopt voltage or charge measuring circuits; ionic polymers and composite ionic polymer materials preferably employ current or charge measurement circuits, as well as voltage measurement circuits.

Referring to fig. 9, the flexible polymer pressure sensor on the flexible ear cap 11 is connected to the sensor measurement circuit 14 through an electrode interface and a lead, and different measurement circuits are selected according to the principle of the flexible polymer pressure sensor.

Referring to fig. 9, the active flexible polymer pressure sensor selects different electrical quantity measuring circuits:

piezoelectric polymers and piezoelectric electret polymer sensors employ a voltage or charge measurement circuit (fig. 9 (b));

the ionic polymer and composite ionic polymer material preferably adopt a current (figure 9(a)) or charge measuring circuit (figure 9(b)), the negative electrode and the output end of an operational amplifier 82 are connected with a feedback resistor 81 or a feedback capacitor 83 in parallel, and the conversion gain of the operational amplifier 82 is adjusted through the feedback resistor 81 or the feedback capacitor 83, and a voltage measuring circuit can also be adopted.

The electrical parameters of the passive flexible polymer pressure sensor adopt a bridge circuit to measure resistance or capacitance; or the constant current source is used as excitation, and the voltage at the two ends of the sensor is measured to sense the pulsation of the blood vessel.

Referring to fig. 10, the passive polymer pressure sensor selects different electrical parameter measurement circuits:

measuring resistance or capacitance by using a bridge circuit (fig. 10(a)), wherein the bridge circuit comprises three bridge arm resistances 92 and a sensor equivalent impedance 91 which are sequentially connected in series; or using a constant current source as excitation, measuring the voltage at two ends of the sensor (figure 10(b)) to sense the blood vessel pulsation, and the electric parameter measuring circuit comprises a bridge arm resistor 92 and a sensor equivalent impedance 91.

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. 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.

In this embodiment, the structure, installation and process of the various forms of flexible earmuffs are primarily described.

The active flexible polymer pressure sensing material comprises Nafion material of DuPont company, Flemion material of Asahi glass company, polyelectrolyte gel and the like; and PVDF and ionic liquid composite materials, thermoplastic polyurethane elastomers, ionic liquid composite materials and the like.

Referring to fig. 3, the ionic polymer and the composite ionic polymer material can be formed by a solution volatilization film forming method, a flexible earcap structure mold is designed, and the ionic polymer/the composite ionic polymer material is integrally cast to form a film without a surface structure; in order to improve the sensitivity of the sensor, the ionic polymer/composite ionic polymer material is integrally cast to form a surface structure, the upper surface area and the lower surface area of the surface structure are different, and the surface structure is a channel-type microstructure 221, a platform-shaped microstructure 22 (a prismoid or a circular truncated cone) 2, a pyramid-type microstructure 223 (a pyramid or a cone) or the like.

Referring to fig. 4(a), the ionic polymer and the composite ionic polymer material are made into the diaphragm-shaped pressure sensor 32 with the ionic polymer/composite ionic polymer non-surface structure 21 by a conventional process, the diaphragms of the diaphragm-shaped pressure sensor 32 can be circumferentially or radially arranged, and two or more diaphragm-shaped pressure sensors 32 are circumferentially or radially attached to the outer edge cap 112, so that the flexible earmuff 11 with pressure sensing capability can be obtained.

In order to improve the sensitivity of the diaphragm-shaped pressure sensor, the diaphragm-shaped pressure sensor 32 with the ionic polymer/composite ionic polymer having the surface structure 22 is manufactured by die casting, and is attached to the body by the same method, so that the flexible earcap 11 with pressure sensing capability can be obtained, wherein the surface structure is a channel-type microstructure 221 or a mesa-type microstructure 222.

Referring to fig. 4(b), the active flexible polymer pressure sensing material further includes polyvinylidene fluoride (PVDF) and its modified polymer; piezoelectric film of eTouch corporation, and the like. The piezoelectric polymer and the piezoelectric electret polymer are formed by a complex forming process, the diaphragm-shaped pressure sensor 32 of the ionic polymer/composite ionic polymer non-surface structure 21 is manufactured by adopting a traditional process, the diaphragm-shaped pressure sensor 32 is arranged in the circumferential direction or the radial direction, and two or more diaphragm-shaped pressure sensors 32 are attached to the outer edge cap 112 along the circumferential direction or the radial direction, so that the flexible earmuff 11 with the pressure sensing capability can be obtained.

The passive flexible polymer pressure sensing material comprises a polymer composite material doped with conductive particles, wherein the polymer can be various silicon rubbers, thermoplastic polyurethane elastomers and the like, and the conductive particles can be carbon nano tubes, activated carbon, conductive graphite, metal nano particles, nano wire materials and the like; high dielectric constant flexible polymers (silicone rubber, polyvinyl chloride (PVC) gels), ionomers, and composite ionomer materials, among others.

Referring to fig. 5 and 6, the thermoplastic polyurethane elastomer, the PVC gel, the ionomer, the composite ionomer material, etc. doped with the conductive particles may be formed by solution evaporation; the silicon rubber doped with conductive particles, the silicon rubber used for the capacitive sensor and the like can be formed by solution crosslinking; the thermoplastic polyurethane elastomer or the like doped with the conductive particles can be formed by hot pressing.

The passive polymer pressure sensor material is made into the diaphragm-shaped pressure sensor 32 of the passive polymer non-surface structure 41 by adopting the traditional process, the diaphragm-shaped pressure sensor can be arranged in the circumferential direction or in the radial direction, and two or more diaphragm-shaped pressure sensors 32 are attached to the outer edge cap 112 along the circumferential direction or the radial direction, so that the flexible earmuff 11 with the pressure sensing capability can be obtained.

In order to improve the sensitivity of the sensor, the flexible earmuff 11 with pressure sensing capability can be obtained by modifying the mold and casting the membrane-shaped pressure sensor 32 with the passive polymer surface structure 42, and attaching the membrane-shaped pressure sensor to the outer edge cap 112 by the same method, wherein the passive polymer surface structure 42 is a channel-type microstructure 221, a mesa-type microstructure 222 (a frustum or a circular truncated cone), a pyramid-type microstructure 223 (a pyramid or a cone), a columnar microstructure 424 (a prism or a cylinder), and the like.

Through the embodiment, the flexible earmuffs 11 with different polymer pressure sensing materials and different structures can be obtained, and the two electrodes of the sensor are distributed on the two sides of the external cap of the flexible earmuff. Referring to fig. 7 and 8, the inner and outer surface electrodes 61 of the inner tube of the flexible earmuff are led to the bottom surface and the step surface of the inner tube of the flexible earmuff through the flexible electrodes, and a sufficient gap is left between the two electrodes to prevent short circuit. And an insulating protective layer 62 is coated on the outer surface of the flexible earmuff to protect and improve the wearing comfort of the flexible earmuff.

The diameter of the inner tube of the flexible earmuff is slightly smaller than that of the step of the sound outlet tube, and the inner and outer surface electrodes 61 and the outer electrode 71 of the sound outlet tube in the inner tube of the flexible earmuff can be in firm contact under the action of the elastic force of the flexible earmuff, so that the connection with a sensor measuring circuit is ensured.

In conclusion, the invention utilizes the flexible polymer pressure sensor to measure the pulse of the blood vessel in the auditory canal, thereby monitoring the heart rate health condition of a user, having simple test principle and power saving, hardly increasing the complexity and quality of the earphone structure and having important popularization value.

The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.

Claims

1. An in-ear flexible heart rate measuring earmuff device based on a polymer sensor is characterized by comprising a body (1), wherein the body (1) comprises a flexible earmuff (11) with a flexible polymer pressure sensor, the flexible earmuff (11) is sleeved on an earphone upper cover structure (12), the earphone upper cover structure (12) is connected with an earphone lower cover structure (18), a micro-control circuit (17) and a sensor measuring circuit (14) which are mutually connected are arranged between the earphone upper cover structure (12) and the earphone lower cover structure (18), power module (15) and bluetooth module (16), flexible earmuff (11) contact the blood vessel in the ear and are used for the heart rate monitoring of motion in-process, and sensor measuring circuit (14) can send electric response signal to little control circuit (17), and little control circuit (17) send mobile terminal through bluetooth module (16) and are used for showing.

2. The ear-in-ear type flexible heart rate measuring ear cap device based on the polymer sensor according to claim 1, characterized in that the flexible ear cap (11) comprises an outer edge cap (112) and an inner sleeve (111), the inner sleeve (111) is arranged in the center of the outer edge cap (112), the bottom surface and the step surface of the inner sleeve (111) are respectively provided with inner tube inner and outer surface electrodes (61) of the flexible ear cap, and the inner tube inner and outer surface electrodes (61) of the two flexible ear caps are arranged at intervals.

3. The in-ear flexible heart rate measuring earcap device based on the polymer sensor as claimed in claim 2, wherein the sound outlet tube top ring side surface and the necked-down step surface of the earphone top cover structure (12) are respectively provided with a sound outlet tube external electrode (71), and the two sound outlet tube external electrodes (71) are arranged at intervals and are respectively connected with the sensor measuring circuit (14) through electrode leads.

4. An ear-in-ear type flexible heart rate measuring ear muff device based on polymer sensor according to claim 3, characterized in that the inner sleeve (111) is fastened with the sound outlet tube of the earphone upper cover structure (12), and the elastic force of the flexible ear muff is used to ensure the effective contact of the outer electrode (71) of the sound outlet tube.

5. The polymer sensor-based ear-in-ear flexible heart rate measuring ear cap device according to claim 2, characterized in that the surface of the outer peripheral cap (112) is entirely coated with an insulating protective layer (62).

6. The in-ear flexible heart rate measuring earcap device based on a polymer sensor according to claim 1, wherein the flexible polymer pressure sensor is made of an active flexible polymer pressure sensing material, the active flexible polymer pressure sensing material comprises an ionomer, a composite ionomer material or a piezoelectric polymer, and a membrane-shaped pressure sensor (32) with an ionomer/composite ionomer surface structure (22), a pressure sensor with an integrated flexible earcap shape or a membrane-shaped pressure sensor (32) without an ionomer/composite ionomer surface structure (21) is made as the flexible earcap (11); the diaphragm-shaped pressure sensor (32) is of a strip structure or an arc structure and is arranged along the circumferential direction or the radial direction of the surface of the outer edge cap (112) of the flexible earmuff (11).

7. The ear-in flexible heart rate measuring ear cap device based on polymer sensor according to claim 6, characterized in that the ionomer/polyion has a surface structure (22) that is a channel type microstructure (221) or a mesa type microstructure (222).

8. The ear-in-ear type flexible heart rate measuring earcap device based on the polymer sensor as claimed in claim 1, wherein the flexible polymer pressure sensor is made of a passive polymer pressure sensing material, and comprises a resistive polymer pressure sensor and/or a capacitive polymer pressure sensor, the flexible earcap shape integrated pressure sensor, the diaphragm pressure sensor (32) with the surface structure (42) or the earplug shape pressure sensor without the surface structure (41) is made into an arc-shaped structure diaphragm pressure sensor (32), the flexible earcap shape integrated pressure sensor, the diaphragm pressure sensor (32) with the surface structure (42) or the earplug shape pressure sensor is made into a flexible earcap (11), and the diaphragm pressure sensor (32) is a strip structure or an arc-shaped structure and is circumferentially or radially arranged along the surface of the outer edge cap (112) of the flexible earcap.

9. The polymer sensor-based ear-in-ear flexible heart rate measuring ear cap device according to claim 8, characterized in that the surface structure (42) is a track-type microstructure (221), a mesa-type microstructure (222), a pyramid-type microstructure (223) or a pillar-type microstructure (424).