KR101695568B1 - Multi-function sensor module - Google Patents

Abstract

The present invention relates to a multifunctional sensor module. According to an embodiment of the present invention, the multifunctional sensor module comprises: a main substrate (10) which is flexible and stretchable, and has a hollow transmission tunnel (11) formed therein; an energy receiving unit (20) which is arranged on one surface of the main substrate (10), includes a reception antenna (21) to receive a microwave transmitted from the outside and a rectifier (23) to convert alternating current power of the microwave into direct current power, and wirelessly receives energy; an energy storage unit (30) which is arranged on one surface of the main substrate (10) and stores energy received by the energy receiving unit (20); an environment sensor unit (40) which is arranged on one surface of the main substrate (10) and receives energy stored in the energy storage unit (30) to detect an environment factor; a bio-signal sensor unit (50) which is arranged on one surface of the main substrate (10) and receives the energy stored in the energy storage unit (30) to measure a bio-signal; and liquid metal (60) injected into the transmission tunnel (11) to electrically connect at least two among the energy receiving unit (20), the energy storage unit (30), the environment sensor unit (40), and the bio-signal sensor unit (50).

Description

Multifunction Sensor Module {MULTI-FUNCTION SENSOR MODULE}

The present invention relates to a multifunctional sensor module.

An element that detects a physical quantity from a measurement object and changes the detected physical quantity into an electrical signal is called a sensor. As the industry becomes more sophisticated, the proportion of the sensor is increasing. For example, a conventional vehicle that simply operated mechanically was equipped with a variety of electronic components and sensors to automatically activate the wiper when it rains, automatically detecting obstacles in the front and rear and informing the driver . Also, in recent years, as in the case of a gas sensor disclosed in the patent documents of the following prior art documents, the present invention is also applied to a field for preventing people's safety accidents. Specifically, the gas sensor detects the harmful gas to the human body, thereby informing the operator that the harmful level of gas has leaked, or driving the exhaust system to prevent the human injury caused by the gas accident. On the other hand, the gas sensor operates by receiving power from an external power source, and continuously consumes a large amount of electric power because it continuously detects gas in the air against harmful gas leakage. Therefore, in order to use the gas sensor, it is inconvenient to fix the gas sensor to a mechanical device or a facility equipped with a separate power source, or to use an external connection line. In addition, when the gas sensor is mounted on a portable device and used, it is necessary to use a battery. The battery is heavy in weight and large in size, and is inconvenient to carry. In addition, conventional gas sensors only detect gas leaks and can not detect changes in the user's body. Therefore, even if the user is exposed to the noxious gas, it is not easy to grasp the state of the user, so that quick treatment is difficult. As a result, the conventional sensor has low portability and many sensors are not integrated so that various information can not be detected at the same time.

Accordingly, there is a desperate need for a solution to the problem occurring in the sensor according to the prior art.

KR 10-2015-0102841 A

According to an aspect of the present invention, there is provided an apparatus for detecting an energy of an object, comprising: an energy receiving unit for receiving energy wirelessly; an energy storing unit for storing energy; an environmental sensor unit; So as to provide a multifunctional sensor module in which a plurality of sensors are driven.

Another aspect of the present invention is to provide a multifunctional sensor module in which a substrate is flexible and stretchable, and an energy receiving unit, an energy storage unit, and a plurality of sensor units are electrically connected by liquid metal in the substrate, .

The multifunctional sensor module according to an embodiment of the present invention includes a main substrate having a flexible, stretchable and hollow transmission tunnel formed therein, a plurality of microphones arranged on one surface of the main substrate, And a rectifier for converting the AC power of the microwave into DC power, the apparatus comprising: an energy receiving unit for receiving energy by radio; an energy receiving unit disposed on one surface of the main substrate, for receiving the energy received by the energy receiving unit; An energy storage unit disposed on one side of the main substrate for receiving the energy stored in the energy storage unit and detecting an environmental factor; an energy storage unit disposed on one surface of the main substrate, A living body signal sensor unit receiving the stored energy and measuring a living body signal, and a living body signal sensor injected into the transmission tunnel, Receiver, and includes the energy storage unit, wherein the environmental sensor unit, or a liquid metal for electrically connecting at least two of the bio-signal sensor.

Further, in the multifunctional sensor module according to the embodiment of the present invention, the main board is attached to the human body.

Further, in the multi-function sensor module according to the embodiment of the present invention, the energy storage unit is a supercapacitor.

Further, in the multi-function sensor module according to the embodiment of the present invention, the supercapacitor includes a flexible element substrate, a collector on which titanium and gold are sequentially deposited on one surface of the element substrate, a multiwall carbon nanotube And an electrolyte layer coated with an electrolyte on the electrode layer so as to cover the electrode layer.

Further, in the multifunctional sensor module according to the embodiment of the present invention, the plurality of supercapacitors are arranged in a plurality of rows along the longitudinal direction of the main substrate.

Further, in the multi-function sensor module according to the embodiment of the present invention, the element substrate is formed in a hexagonal plate shape, and the two adjacent element substrates are arranged so that one side faces each other.

Further, in the multifunctional sensor module according to the embodiment of the present invention, the environmental sensor unit is electrically connected to the energy storage unit.

Further, in the multifunctional sensor module according to the embodiment of the present invention, the environmental sensor unit detects at least one of nitrogen dioxide or ultraviolet rays.

Further, in the multifunctional sensor module according to the embodiment of the present invention, the environmental sensor unit includes a flexible environmental sensor substrate, titanium and gold are sequentially deposited on both sides of one surface of the environmental sensor substrate, A lower thin film layer formed by applying a multi-wall carbon nanotube between a pair of the environmental sensor electrodes, and an upper thin film layer formed by applying tin oxide on the lower thin film layer.

Further, in the multifunctional sensor module according to the embodiment of the present invention, the bio-signal sensor unit is electrically connected to the environmental sensor unit.

Further, in the multifunctional sensor module according to the embodiment of the present invention, the bio-signal sensor unit may include a film layer formed in a thin film shape, a slice layer disposed on one side of the film layer and formed of a graphene foam fragment, And a bio-signal sensor electrode disposed on the fragment layer.

The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings.

Prior to that, terms and words used in the present specification and claims should not be construed in a conventional and dictionary sense, and the inventor may properly define the concept of the term in order to best explain its invention It should be construed as meaning and concept consistent with the technical idea of the present invention.

According to the present invention, since an energy receiving unit for receiving energy wirelessly, an energy storing unit for storing energy, an environmental sensor unit and a living body signal sensor unit are disposed on one substrate, there is no connection line connected to an external power source, Are simultaneously driven, and harmful environmental factors and biological signals can be detected at once.

According to the present invention, since the substrate is flexible and stretchable, the liquid metal is injected into the tunnel in the substrate, and the energy receiving unit, the energy storing unit, and the plurality of sensors are electrically connected to each other. have.

1 is a plan view of a multi-function sensor module according to an embodiment of the present invention.
2 is a cross-sectional view of a multi-function sensor module according to an embodiment of the present invention.
3 is a perspective view of a multifunctional sensor module according to an embodiment of the present invention attached to a human body.
4 is a top view of the supercapacitor of FIG.
5 is a cross-sectional view of the supercapacitor according to line AA 'in FIG.
6 is a plan view of the environmental sensor unit of FIG.
7 is a cross-sectional view of the environmental sensor unit taken along line BB 'of FIG.

BRIEF DESCRIPTION OF THE DRAWINGS The objectives, specific advantages and novel features of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG. It should be noted that, in the present specification, the reference numerals are added to the constituent elements of the drawings, and the same constituent elements are assigned the same number as much as possible even if they are displayed on different drawings. Also, the terms "first "," second ", and the like are used to distinguish one element from another element, and the element is not limited thereto. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following description of the present invention, detailed description of related arts which may unnecessarily obscure the gist of the present invention will be omitted.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a cross-sectional view of a multi-function sensor module according to an embodiment of the present invention. FIG. 3 is a cross-sectional view of a multi-function sensor module according to an embodiment of the present invention, Fig.

1 and 2, a multifunctional sensor module according to an embodiment of the present invention includes a main substrate (flexible substrate) 11 that is flexible, stretchable, and has a hollow transmission tunnel 11 formed therein 10, a receiving antenna 21 disposed on one surface of the main substrate 10 for receiving microwaves transmitted from the outside, and a rectifier 23 for converting AC power of the microwave into DC power, An energy storage unit 30 disposed on one side of the main substrate 10 and storing the energy received by the energy reception unit 20, an energy storage unit 30 disposed on one side of the main substrate 10, An environmental sensor unit 40 that receives energy stored in the energy storage unit 30 and detects an environmental factor; a power supply unit 40 that is disposed on one surface of the main substrate 10 and receives energy stored in the energy storage unit 30, A biological signal sensor unit 50 for measuring a signal, The mouth, and includes an energy receiving unit 20, an energy storage unit 30, an environmental sensor unit 40, a bio-signal sensor or a liquid metal (60) electrically connected to at least two of the 50.

The multifunctional sensor module according to the present embodiment includes a main substrate 10, an energy receiving unit 20, an energy storage unit 30, An environment sensor unit 40, a living body signal sensor unit 50, and a liquid metal 60.

Here, the main substrate 10 is a substrate on which an energy receiving unit 20, an energy storing unit 30, an environmental sensor unit 40, and a living body signal sensor unit 50 are disposed and integrated, flexible, and stretchable. In order to have such flexibility and stretchability, the main substrate 10 is made of a polymer material such as ecoflex or the like. At this time, the polymer material is not necessarily limited to the ecoflex, and various materials can be used as long as the main substrate 10 can have flexibility and stretchability. In addition, the main substrate 10 may be made of a transparent material.

The main substrate 10 is provided with a transmission tunnel 11 for electrically connecting the energy receiving unit 20, the energy storage unit 30, the environmental sensor unit 40, and the living body signal sensor unit 50 do. Specifically, the transmission tunnel 11 is formed in a hollow shape inside the main substrate 10, and a liquid metal 60, which will be described later, is injected therein to enable electrical connection.

The energy receiving unit 20 includes a receiving antenna 21 and a rectifier 23 for receiving energy from the outside to drive the environment sensor unit 40 and the living body signal sensor unit 50. Here, the energy receiving unit 20 receives power wirelessly using a radio frequency (RF). More specifically, the receiving antenna 21 receives the high output microwave transmitted from the external transmitting unit. At this time, since the microwave is transmitted by the AC signal, the rectifier 23 converts the AC power of the microwave into the DC power. Since the microwave signal is radiated into the air and the electric power is transmitted wirelessly, the electric power can be effectively transmitted and received even at a long distance. On the other hand, the received energy is stored in the energy storage unit 30.

The energy storage unit 30 is an element for storing energy transferred from the energy reception unit 20, and may be, for example, a supercapacitor 30. [ Here, the supercapacitor 30 is known as an electrochemical capacitor or an ultracapacitor, and has a high energy density, a large power density, and a long cycle life. At this time, the supercapacitor 30 used as the energy storage unit 30 may be a flexible supercapacitor 30, which will be described later in detail. The energy stored in the energy storage unit 30 drives the environment sensor unit 40 and the living body signal sensor unit 50.

Here, the environmental sensor unit 40 is a sensor for detecting an environmental factor. At this time, the environmental factor is various factors constituting the environment, for example, it may be an element which gives a harmful environment to the human body such as nitrogen dioxide, ultraviolet ray, and the like. Therefore, the environmental sensor unit 40 can detect at least one of nitrogen dioxide or ultraviolet rays as a harmful environmental factor, and warn the user that the user is exposed to a harmful environment. However, the environmental factor detected by the environmental sensor unit 40 is not limited to this, and may include environmental factors such as moisture, temperature, oxygen, and carbon dioxide. Meanwhile, since the environmental sensor unit 40 is driven by receiving the energy stored in the energy storage unit 30, it is possible to more stably detect environmental factors. At this time, the environmental sensor unit 40 may be electrically connected directly to the energy storage unit 30 in order to minimize the transmission loss. At this time, the energy storage unit 30 disposed adjacent to the shortest distance can be connected to receive power. The specific configuration of the environmental sensor unit 40 will be described later.

On the other hand, the living body signal sensor unit 50 is a sensor for measuring a living body signal. The living body signal sensor unit 50 detects a living body signal such as a pulse, a voice, a swallowing motion, a muscle motion, etc., and the living body signal is converted into an electric signal and transmitted. Therefore, when the measurement subject is exposed to a specific environment such as a harmful environment, it is possible to immediately detect a change in the body that occurs to the measurement subject.

Specifically, the bio-signal sensor unit 50 may include a film layer 51, a fragment layer 53, and a bio-signal sensor electrode 55. Here, the film layer 51 is a layer formed in a thin film shape. At this time, the film layer 51 may be made of, for example, polydimethylsiloxane (PDMS). Since the film layer 51 formed of polydimethylsiloxane has elasticity and is flexible and stretchable, it deforms together with the main substrate 10 when the main substrate 10 is warped or stretched. However, the material of the film layer 51 is not limited to polydimethylsiloxane.

The piece layer 53 is a layer disposed on one side of the film layer 51, and is formed of a graphene foam fragment. At this time, the graphene foam slice can be obtained by growing a graphene foam on a nickel foam substrate by chemical vapor deposition (CVD), and then grinding the graphene foam into isopropyl alcohol.

A living body signal sensor electrode 55 is disposed on the sliced layer 53 formed in this way, receives electric power, converts the detected living body signal into an electric signal, and transmits the electric signal.

At this time, the bio-signal sensor unit 50 may be driven by receiving power directly from the energy storage unit 30, but it may be supplied with electric power from the adjacent environmental sensor unit 40. [ When electric power is supplied from the environment sensor unit 40, electric power is transmitted to the bio-signal sensor unit 50 through the energy receiving unit 20, the energy storage unit 30, and the environment sensor unit 40 in sequence .

On the other hand, the liquid metal 60 is injected into the transmission tunnel 11 of the main substrate 10 as a metal or an alloy melted at the use temperature. There is free electrons in the liquid metal 60, so electricity is good. Therefore, at least two of the electronic elements disposed on one surface of the main board 10, that is, the energy receiving unit 20, the energy storage unit 30, the environmental sensor unit 40, or the biological signal sensor unit 50, . As a result, the liquid metal 60 serves as a power supply line. Particularly, since the liquid metal 60 is not broken even when the main board 10 is bent or stretched during operation, it is possible to effectively connect the electronic devices on the flexible and stretchable main board 10. This liquid metal 60 may be, for example, Galinstan. However, the liquid metal 60 is not necessarily limited to gallstones, but includes all metals and alloys that are electrically conductive in a liquid state.

The multifunctional sensor module according to the present embodiment includes an energy receiving unit 20 for receiving energy wirelessly, an energy storage unit 30 for storing energy, an environment sensor unit 40, and a living body signal sensor unit 50 Since it is disposed on one main substrate 10, there is no connection line connected to an external power source, so that it is easy to carry and a plurality of sensors are driven at the same time, so that harmful environmental factors and biological signals can be detected all at once.

3, the multifunctional sensor module according to the present embodiment includes a main board 10 which is flexible and expandable, receives energy by receiving energy wirelessly, and is connected to an energy receiving unit 20, an energy storage unit 30, the environment sensor unit 40, and the bio-signal sensor unit 50 are electrically connected by the liquid metal 60, they can be worn on the human body. That is, the multifunctional sensor module according to the present embodiment is a wearable device, and can be continuously worn by the user on the human body to perceive the user's surrounding environment and body change. At this time, the main board 10 can be attached to a human body. Therefore, the multifunctional sensor module according to the present embodiment can be directly attached to a human body without being attached to a separate attachment means such as a band or a buckle.

Hereinafter, the supercapacitor 30 and the environmental sensor unit 40 will be described in detail.

FIG. 4 is a plan view of the supercapacitor of FIG. 1, and FIG. 5 is a cross-sectional view of the supercapacitor along line A-A 'of FIG.

4 to 5, the supercapacitor 30 as the energy storage unit 30 of the multifunctional sensor module according to the embodiment of the present invention includes an element substrate 31, a current collector 33, an electrode layer 35 ), And an electrolyte layer (37).

Here, the element substrate 31 is a substrate on which a current collector 33, an electrode layer 35, and an electrolyte layer 37 are sequentially laminated on one surface thereof. At this time, the element substrate 31 is made of a polymer material and is flexible. At this time, the polymer material to be the material of the element substrate 31 may be polyethylene terephthalate (PET), but is not limited thereto and includes various polymeric materials that impart flexibility to the element substrate 31 . On the other hand, the current collector 33 is formed by sequentially depositing titanium (Ti) 1 and gold (Au) 3 on one surface of the element substrate 31. At this time, the current collector 33 is composed of two current collectors 33a and 33b. Specifically, the two current collecting powders 33a and 33b are formed with comb-like projecting portions 33aa and 33bb, respectively. The two current collecting powders 33a and 33b are arranged such that the respective projecting portions 33aa and 33bb are staggered, . The electrode layer 35 is laminated on the current collector 33 thus formed. Here, the electrode layer 35 is formed by stacking multi-wall carbon nanotubes, and is covered with the electrolyte layer 37. Here, the electrolyte layer 37 surrounds the electrode layer 35 so that the electrolyte is applied to the electrode layer 35 so that the electrode layer 35 is not exposed to the outside.

More specifically, the supercapacitor 30 will be described by way of a method of manufacturing the super capacitor 30. First, two layers of photoresist are spin-coated on the element substrate 31. Next, At this time, the first layer may be spin-coated at 500 rpm for 30 seconds, 3000 rpm for 60 seconds, and then annealed at 110 degrees for 1 minute. The second layer, the liftoff resist layer, can also be annealed at 170 degrees for 1 minute after coating with the same coating conditions as the first layer. In the next step, photolithography is performed on the coated element substrate 31, and titanium (1) and gold (3) are deposited to a predetermined thickness using a metal evaporator, (33). At this time, the predetermined thicknesses of the titanium (1) and gold (3) may be 5 nm and 50 nm, respectively. Here, the pattern of the current collector 33 is a pattern in which the two current collectors 33a and 33b face each other. In this case, the left and right width w of each of the projections 33aa and 33bb is 480 to 520 탆, The distance i between the protrusions 33aa and 33bb of the first and second protrusions 33a and 33b may be 130 to 170 占 퐉. The electrode layer 35 may be formed by dispersing the multi-wall carbon nanotubes in distilled water at a predetermined concentration, spray coating the patterned device substrate 31, evaporating distilled water using a hot plate, and then removing the photoresist layer have. As a next step, a solid electrolyte (PEGDA / [EMIM] [TFSI]) is applied to the electrode layer 35 and ultraviolet rays are irradiated only to a predetermined region by using a shadow mask to form an electrolyte layer 37 ). Finally, wash with chloroform.

For example, the supercapacitors 30 may be arranged in a plurality of rows along the longitudinal direction of the main substrate 10. The supercapacitors 30 may be spaced apart from each other and arranged in a predetermined shape. (See FIG. 1). At this time, the row of the supercapacitor 30 is formed by disposing a plurality of capacitors spaced apart at a predetermined interval. The rows of the supercapacitors 30 may be arranged in parallel with each other in such a manner that the rows of the supercapacitors 30 are arranged in three columns, with the other two columns facing each other. At this time, the element substrate 31 of the supercapacitor 30 is formed in a hexagonal plate shape, and the adjacent two element substrates 31 can be arranged so that one side faces each other. Here, one side of the element substrate 31 means one side excluding the one on which the current collector 33 is deposited and the opposite side, and as the element substrate 31 is formed into a hexagonal plate shape, The current collector 33, the electrode layer 35, or the electrolyte layer 37 may be stacked in a hexagonal plate shape. When the supercapacitors 30 having the hexagonal plate-shaped element substrate 31 are arranged in three rows in this patterning method, the fill factor is improved as compared with the rectangular plate substrate. Here, the charging rate is defined as a ratio of the operating area to the total area. The total area refers to an area formed by connecting the edges of the outermost supercapacitor 30 when the plurality of supercapacitors 30 are disposed, The area actually refers to the area occupied by the supercapacitors 30. The filling rate of the hexagonal supercapacitor 30 having the element substrate 31 in the hexagonal shape and the rectangular supercapacitor 30 having the rectangular plate shape of the element substrate 31 were measured and the results are shown in the following table.

shape Total area (㎠) Working area (㎠) Filling rate (%) Hexagon shape 14.8 11.5 77.7 Square shape 16 9 56.3

As has been experimentally confirmed, it was confirmed that the charging rate of the hexagonal supercapacitor 30 is improved by 1.38 times or more as compared with the square shape.

FIG. 6 is a plan view of the environmental sensor unit of FIG. 1, and FIG. 7 is a cross-sectional view of the environmental sensor unit taken along the line B-B 'of FIG.

6 through 7, the environmental sensor unit 40 may include an environmental sensor substrate 41, an environmental sensor electrode 43, a lower thin film layer 45, and an upper thin film layer 47. Here, the environmental sensor substrate 41 is a flexible substrate, for example, made of polyethylene terephthalate (PET). However, the material of the environmental sensor substrate 41 is not limited thereto, but includes all the polymer materials as long as it gives flexibility to the environmental sensor substrate 41. The environment sensor electrode 43 is formed by sequentially stacking titanium 1 and gold 3 and is disposed on both sides of one surface of the environmental sensor substrate 41 and exists as a pair. On the other hand, the lower thin film layer 45 is formed by spray-coating a multi-wall carbon nanotube solution between a pair of environmental sensor electrodes 43, and the upper thin film layer 47 is formed by depositing tin oxide (SnO ₂ ) Is applied and formed. More specifically, spraying a multi-walled carbon nanotube solution having a predetermined concentration dispersed in distilled water to form a lower thin film layer 45, and a predetermined concentration of tin oxide solution dispersed in ethanol is applied to the lower thin film layer 45 And the upper thin film layer 47 is formed by drop casting to produce a fusion film.

 While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the same is by way of illustration and example only and is not to be construed as limiting the present invention. It is obvious that the modification or improvement is possible.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

10: main substrate 11: transmission tunnel
20: energy receiving unit 21: receiving antenna
23: rectifier 30: energy storage unit
31: element substrate 33; Whole house
33a, 33b: current collecting powder 35: electrode layer
37: electrolyte layer 40: environmental sensor unit
41: environmental sensor substrate 43: environmental sensor electrode
45: lower thin film layer 47: upper thin film layer
50: biological signal sensor part 51: film layer
53: slice layer 55: biological signal sensor electrode
60: liquid metal

Claims (11)

A main board which is flexible, stretchable and has a hollow transmission tunnel formed therein;
An energy receiving unit that is disposed on one surface of the main substrate and receives radio energy by including a receiving antenna that receives microwaves transmitted from the outside and a rectifier that converts AC power of the microwave into DC power;
An energy storage unit disposed on one surface of the main substrate and storing the energy received by the energy receiving unit;
An environmental sensor disposed on one surface of the main substrate and configured to receive the energy stored in the energy storage unit and detect an environmental factor;
A bio-signal sensor unit disposed on one surface of the main substrate, for receiving the energy stored in the energy storage unit and measuring a bio-signal; And
A liquid metal that is injected into the transmission tunnel and electrically connects at least two of the energy receiver, the energy storage unit, the environmental sensor unit, and the living body signal sensor unit;
/ RTI >
The environmental sensor unit,
Flexible environmental sensor substrate;
A pair of environmental sensor electrodes which are sequentially deposited on both sides of one surface of the environmental sensor substrate and on which titanium and gold are sequentially deposited,
A lower thin film layer formed by applying a multi-wall carbon nanotube between a pair of the environmental sensor electrodes; And
An upper thin film layer formed by applying tin oxide on the lower thin film layer;
And a sensor module.
The method according to claim 1,
Wherein the main board is attached to a human body.
The method according to claim 1,
Wherein the energy storage unit is a supercapacitor.
The method of claim 3,
The supercapacitor includes:
Flexible device substrate;
A current collector on which titanium and gold are sequentially deposited on one surface of the element substrate;
An electrode layer formed by depositing multi-walled carbon nanotubes on the current collector; And
An electrolyte layer coated on the electrode layer to cover the electrode layer;
And a sensor module.
The method of claim 4,
Wherein the plurality of supercapacitors are arranged in a plurality of rows along a longitudinal direction of the main substrate.
The method of claim 5,
Wherein the element substrate is formed in a hexagonal plate shape, and two adjacent element substrates are disposed so that one side faces thereof face each other.
The method according to claim 1,
And the environmental sensor unit is electrically connected to the energy storage unit.
The method according to claim 1,
Wherein the environmental sensor unit detects at least one of nitrogen dioxide and ultraviolet rays.
delete The method according to claim 1,
And the bio-signal sensor unit is electrically connected to the environmental sensor unit.
The method according to claim 1,
Wherein the bio-
A film layer formed in a thin film shape;
A slice layer disposed on one side of the film layer and formed of a graphene foam fragment; And
A bio-signal sensor electrode disposed on the fragment layer;
And a sensor module.

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