CN113804732B - Wearable humidity sensing device for detecting human body sweat rate and manufacturing method thereof - Google Patents
Wearable humidity sensing device for detecting human body sweat rate and manufacturing method thereof Download PDFInfo
- Publication number
- CN113804732B CN113804732B CN202110976214.2A CN202110976214A CN113804732B CN 113804732 B CN113804732 B CN 113804732B CN 202110976214 A CN202110976214 A CN 202110976214A CN 113804732 B CN113804732 B CN 113804732B
- Authority
- CN
- China
- Prior art keywords
- humidity
- humidity sensor
- hydrophobic
- mxene
- sensing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 210000004243 sweat Anatomy 0.000 title claims abstract description 59
- 241000282414 Homo sapiens Species 0.000 title claims abstract description 44
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 25
- 230000002209 hydrophobic effect Effects 0.000 claims abstract description 55
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 45
- 239000000463 material Substances 0.000 claims abstract description 34
- 238000004806 packaging method and process Methods 0.000 claims abstract description 24
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims abstract description 15
- 239000004793 Polystyrene Substances 0.000 claims abstract description 15
- 229920002223 polystyrene Polymers 0.000 claims abstract description 15
- 229910052708 sodium Inorganic materials 0.000 claims abstract description 15
- 239000011734 sodium Substances 0.000 claims abstract description 15
- 229920000642 polymer Polymers 0.000 claims abstract description 14
- 238000001514 detection method Methods 0.000 claims abstract description 6
- 239000004020 conductor Substances 0.000 claims description 32
- 238000000034 method Methods 0.000 claims description 25
- 239000000758 substrate Substances 0.000 claims description 15
- 238000006243 chemical reaction Methods 0.000 claims description 11
- 238000002156 mixing Methods 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims description 7
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- 230000006698 induction Effects 0.000 claims description 6
- 239000011810 insulating material Substances 0.000 claims description 5
- 238000005507 spraying Methods 0.000 claims description 3
- 101150096185 PAAS gene Proteins 0.000 abstract description 54
- 230000004044 response Effects 0.000 abstract description 31
- 239000004744 fabric Substances 0.000 abstract description 19
- 230000008859 change Effects 0.000 abstract description 18
- 230000029058 respiratory gaseous exchange Effects 0.000 abstract description 16
- 230000035945 sensitivity Effects 0.000 abstract description 10
- 230000033001 locomotion Effects 0.000 abstract description 7
- 230000005641 tunneling Effects 0.000 abstract description 7
- 239000010410 layer Substances 0.000 description 62
- 238000012806 monitoring device Methods 0.000 description 16
- 238000012544 monitoring process Methods 0.000 description 14
- 230000003075 superhydrophobic effect Effects 0.000 description 13
- 229920000742 Cotton Polymers 0.000 description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 10
- 229920002799 BoPET Polymers 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 7
- 210000001061 forehead Anatomy 0.000 description 7
- 239000005020 polyethylene terephthalate Substances 0.000 description 7
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 6
- 239000004205 dimethyl polysiloxane Substances 0.000 description 5
- 238000001035 drying Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- 238000011084 recovery Methods 0.000 description 5
- 239000000377 silicon dioxide Substances 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 229920000139 polyethylene terephthalate Polymers 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000000284 resting effect Effects 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229920004933 Terylene® Polymers 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 230000036387 respiratory rate Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005538 encapsulation Methods 0.000 description 2
- 235000019441 ethanol Nutrition 0.000 description 2
- 210000000887 face Anatomy 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000006855 networking Effects 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000002522 swelling effect Effects 0.000 description 2
- 238000009210 therapy by ultrasound Methods 0.000 description 2
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- -1 Polydimethylsiloxane Polymers 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 229920001940 conductive polymer Polymers 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 238000001548 drop coating Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910021389 graphene Inorganic materials 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 229910052740 iodine Inorganic materials 0.000 description 1
- 239000011630 iodine Substances 0.000 description 1
- 235000000396 iron Nutrition 0.000 description 1
- 230000004199 lung function Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000001338 self-assembly Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/12—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid
- G01N27/125—Composition of the body, e.g. the composition of its sensitive layer
- G01N27/126—Composition of the body, e.g. the composition of its sensitive layer comprising organic polymers
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/42—Detecting, measuring or recording for evaluating the gastrointestinal, the endocrine or the exocrine systems
- A61B5/4261—Evaluating exocrine secretion production
- A61B5/4266—Evaluating exocrine secretion production sweat secretion
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Pathology (AREA)
- Physics & Mathematics (AREA)
- Endocrinology (AREA)
- Biophysics (AREA)
- Analytical Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Electrochemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Gastroenterology & Hepatology (AREA)
- Physiology (AREA)
- Biochemistry (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
Abstract
The invention discloses a wearable humidity sensing device for detecting human sweat rate and a manufacturing method thereof. The humidity sensing device mainly has the mechanism that water molecules penetrate between the layers of a two-dimensional material MXene to cause the tunneling resistance of the humidity sensing device to be increased, and the sensing of humidity response is realized by measuring the resistance. The tunneling resistance change between the MXene layers is further enhanced by doping sodium Polystyrene (PAAS), an extremely moisture sensitive hydrophilic material, into the MXene sheets. When the mass ratio of the polymer PAAS to the two-dimensional material MXene is 1: at 10, the humidity sensor is prepared to have the most excellent humidity sensitivity. And the self-assembled fabric hydrophobic layer, the packaging layer, the conductive electrode and the flexible wireless module are combined, so that the service performance and stability of the humidity sensor can be effectively improved. The humidity sensing device is simple to prepare, low in cost and high in sensitivity, can detect the perspiration rate of a human body in different motion states, and can be applied to detection of human body breathing parameters, voice recognition and the like.
Description
Technical Field
The invention relates to a wearable humidity sensing device for detecting human sweat rate and a manufacturing method thereof.
Background
At present, the attention of human beings to body health indexes is getting more and more, and few wearable devices for detecting human body perspiration rate exist in the market, so that researchers at home and abroad do much work for detecting human body perspiration. Researchers have reported to spray iodine powder on human skin to make it dark purple in color by contacting with sweat, for detecting the presence of sweat. But this method has not been able to evaluate the sweat level of the human body. In addition, the sweat rate of the human body is calculated by weighing the change in the weight of the patch on the subject, which takes a long time and cannot continuously detect the sweat rate of the human body. Also, researchers have described a wearable sweat rate monitoring sensor that monitors the humidity of two humidity levels in real time by placing the two humidity sensors at different levels of the skin and then converts to sweat rate using the fick first law. However, this device is not flexible and is bulky, requiring two different humidity sensors to operate simultaneously, complicating the overall device. Researchers introduce a graphene paper-based pressure sensor with the working range of 0-20kPa, and the pressure sensor is pressurized by means of air flow during expiration, and the respiration of a human body is monitored by means of the principle of depressurization during inspiration. Although the work realizes the monitoring of respiration, unfortunately, wireless data transmission and remote monitoring cannot be performed, and most of wireless modules currently adopt Bluetooth data transmission, one device can only be connected with one terminal, and single-wire data transmission is realized. In addition, the method for monitoring the human breath mainly depends on a lung function instrument and other heavy and complex instruments, and the high price of the method makes common families difficult to bear. There are few products on the market that are related to human sweat monitoring, so it is urgent to develop a device for monitoring human sweat and breath that is inexpensive and flexible and wearable.
Disclosure of Invention
In order to solve the technical problems of low sensitivity, small detection range, obvious hysteresis effect, complex device structure and high price of the conventional sensor for monitoring the human sweat rate, the invention provides a conductive material, a sensing unit, a sensing end and a humidity sensor in a humidity sensing device, which are simple to process and prepare, low in production cost and good in stability, and a manufacturing method thereof.
In order to achieve the technical purpose, the technical scheme of the invention is that,
A conductive material is prepared by mixing high molecular polymer sodium polystyrene and two-dimensional material MXene.
The mass ratio of the high molecular polymer sodium polystyrene to the two-dimensional material MXene is 1:20-1:5.
The sensing unit of the humidity sensor adopts the conductive material, and further comprises a substrate layer and conductive electrodes, wherein the substrate layer and the conductive electrodes are made of insulating materials, the conductive material is paved on at least one of two sides of the substrate layer, and one conductive electrode is respectively arranged on two sides of the conductive material paved on each side.
The sensing end of the humidity sensor is characterized by comprising a sensing unit, a hydrophobic layer and a packaging layer made of a waterproof material, wherein the packaging layer wraps the hydrophobic layer, the hydrophobic layer wraps the humidity sensing unit, the hydrophobic layer is made of a hydrophilic material and is coated with the hydrophobic material at the position corresponding to the humidity sensing unit to form a hydrophobic structure, a water guide structure for guiding water is arranged on the hydrophobic structure, and a hollowed-out part is arranged at the corresponding position of the water guide structure on the packaging layer.
The sensing end of the humidity sensor is characterized in that the water guide structure is a water transportation line structure and comprises at least two water absorption lines which are distributed on the water drainage structure at equal intervals and are treated by hydrophilic solution.
The humidity sensor comprises a humidity sensor, a wireless module, a control module and a control module, wherein the humidity sensor adopts an induction end of the humidity sensor and further comprises the wireless module which is electrically connected with a conductive electrode on the induction end of the humidity sensor through a wire, the wireless module comprises an Internet of things main control chip, a digital-to-analog conversion chip and a resistive voltage division circuit, and an electric signal transmitted by the conductive electrode is transmitted to the digital-to-analog conversion chip through the resistive voltage division circuit and is transmitted to the Internet of things main control chip for uploading after being converted; and a wireless module is simultaneously connected with the sensing ends of the two humidity sensors at least.
A humidity transducer for sweat rate detects adopts humidity transducer, still includes the gauze mask, the gauze mask in correspond the position of mouth and nose department and buried humidity transducer's sensing end, the wireless module has been buried in the gauze mask in the position of corresponding cheek department.
The preparation method of the conductive material comprises the step of mixing high polymer sodium polystyrene with a two-dimensional material MXene according to a mass ratio of 1:20-1:5.
A manufacturing method of an induction unit of a humidity sensor comprises the following steps:
step1, respectively coating conductive substances on two opposite sides of at least one surface of an insulating material serving as a substrate layer, and fixing a conductor on the conductive substances to obtain a conductive electrode;
And 2, coating the conductive material manufactured by the method between the conductive electrodes on the two sides.
A manufacturing method of an induction end of a humidity sensor comprises the following steps:
Step one, based on the area of the sensing unit of the humidity sensor manufactured by the method, spraying hydrophobic materials with the same area on hydrophilic materials to form a hydrophobic structure, and fixing a water guide structure on the hydrophobic structure to obtain a hydrophobic layer;
Step two, manufacturing a packaging layer with a two-layer structure by using a flexible material, and reserving hollowed-out parts corresponding to the positions of the water guide structures on the packaging layer;
And thirdly, sandwiching the humidity sensing unit of the humidity sensor manufactured by the method between two hydrophobic layers, and sandwiching the two hydrophobic layers between two packaging layers to form a sensing end of the humidity sensor.
The manufacturing method of the humidity sensor is based on the sensing end of the humidity sensor manufactured by the method, and further comprises the following steps:
The method comprises the steps that a conductive electrode at the sensing end of a humidity sensor and a wireless module are connected through a wire to form a loop, wherein the wireless module comprises an Internet of things main control chip, a digital-to-analog conversion chip and a resistive voltage dividing circuit, an electric signal transmitted by the conductive electrode is transmitted to the digital-to-analog conversion chip through the resistive voltage dividing circuit and is transmitted to the Internet of things main control chip after being converted for uploading; and the wireless module is simultaneously connected with the induction ends of the two humidity sensors at least.
The manufacturing method of the humidity sensor device is based on the humidity sensor manufactured by the method, and further comprises the following steps:
the humidity sensor is directly arranged on the surface of a human body and used as a humidity sensing device for detecting the sweat rate; or alternatively
The sensing end of the humidity sensor is buried in the position corresponding to the mouth and nose in the mask, and the wireless module is buried in the position corresponding to the cheek in the mask, so that the humidity sensing device for sweat rate detection or voice recognition is obtained.
The invention has the technical effects that the MXene has the advantages of high conductivity, good hydrophilicity, rich surface terminal (such as-F, -OH) and the like, and the MXene shows hydration in a wider Relative Humidity (RH) range. The water molecules are preferentially adsorbed on the cavities and hydrophilic groups through double bonds or single bonds. The water molecules are inserted between the MXene layers to cause the change of resistivity, thereby realizing the sensing of humidity. The invention aims to further improve the sensitivity, and inserts a hydrophilic and water-swellable material into the MXene layer, so that the change of tunneling resistance between the MXene layer can be further increased, and the response sensitivity of the MXene material to humidity is promoted. PAAS (sodium polystyrene) has very good water swelling property, and is a substance extremely sensitive to humidity. And PAAS is neutral after being dissolved in water, and can not cause aggregation or decomposition after being compounded with MXene. Therefore, a composite of MXene and PAAS is highly expected to be a moisture-sensitive material having high sensitivity and high response speed. The invention is based on the compound to manufacture the humidity sensor for detecting the sweat rate of human body, and the principle is that the tunneling resistance is increased after water molecules are inserted between MXene layers, thereby realizing the sensing of humidity. When the MXene/PAAS composite humidity sensor used in the invention is exposed in a humidity environment, the interlayer spacing is increased due to the expansion of PAAS water absorption, so that the tunneling resistance of the MXene sheet is increased, and the humidity change of the environment is converted into a visible electric signal. The humidity sensor is mainly formed by integrating a high-sensitivity MXene/PAAS humidity sensor, a flexible PDMS film and a super-hydrophobic fabric layer. And then, the in-situ collection of data and the transmission of data in a wireless WiFi mode are realized by connecting the flexible PCB module. Through the super hydrophobic layer of fabric of self-assembly structure, encapsulation layer, fabric super hydrophobic layer, conductive electrode and flexible wireless module, effectively improve humidity transducer's durability. Wherein the hydrophobic layer is embedded in a plurality of cotton threads treated with a hydrophilic solution in the treated hydrophobic region. One surface with cotton thread structure faces to skin, not only can prevent human sweat from directly contacting the humidity sensor through the hydrophobic area, but also can transport accumulated sweat of skin to the hydrophilic area through cotton threads, thus finishing human sweat detection. On the other hand, the humidity sensor realizes multi-channel wireless data transmission and remote monitoring through a Wifi network established by the flexible wireless module.
Drawings
Fig. 1: MXene/PAAS humidity sensor sweat rate monitoring device structure schematic diagram
Fig. 2: the MXene/PAAS humidity sensor is researched to find an experimental diagram of the optimal mass ratio of the PAAS to the two-dimensional material MXene, FIG. 2 (a) is used for comparing the sensitivity comparison of humidity sensors with different PAAS contents to humidity response, and FIGS. 2 (b) and (c) are used for comparing the PAAS response/recovery time of 2mg and 3mg under the condition of 50% RH.
Fig. 3: dynamic characteristics of resistance response versus time for MXene/PAAS humidity sensors under different moderate conditions.
Fig. 4: the MXene/PAAS humidity sensor has a dynamic response curve at a temperature of 19 ℃, 28 ℃, 37 ℃, 40 ℃ and 45 ℃ under a relative humidity of 45%.
Fig. 5: the MXene/PAAS humidity sensor human body sweat rate monitoring device is attached to the arm of FIG. 5 (a); fig. 5 (b) forehead; fig. 5 (c) shows the resistance change value versus time characteristic curve of the back.
Fig. 6: MXene/PAAS humidity sensor, resistance change values versus time curves for different hydrophilic/hydrophobic structure fabrics.
Fig. 7: an MXene/PAAS humidity sensor, fig. 7 (a) studied the resistance change of the human respiration monitoring device at the time of normal walking, running, resting, and deep resting of the volunteer; FIG. 7 (b) is a graph of the resistive dynamic response of MXene/PAAS composite humidity sensor speech recognition.
Wherein 1 is a basal layer, 2 is a hydrophobic layer provided with a water guide structure, 3 is a packaging layer correspondingly provided with a water guide structure, 4 is a hydrophobic layer without a water guide structure, 5 is a packaging layer correspondingly without a water guide structure, 6 is a wire for connecting a wireless module with a conductive electrode, and 7 is a wireless module.
Detailed Description
The technical means used to achieve the intended objects and advantages of the present invention will be described in detail and fully with reference to the accompanying drawings and the preferred embodiments. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by a person skilled in the art without any inventive effort, are intended to fall within the scope of the present invention.
Firstly, the embodiment discloses a conductive material which is formed by mixing high molecular polymer sodium polystyrene and a two-dimensional material MXene. Wherein the mass ratio of the high polymer sodium polystyrene to the two-dimensional material MXene is 1:20-1:5. According to the invention, the conductive polymer is obtained by doping a two-dimensional conductive material MXene with a high molecular polymer sodium Polystyrene (PAAS). The sodium polystyrene has good water swelling property, and is a substance extremely sensitive to humidity. And PAAS is neutral after being dissolved in water, and can not cause aggregation or decomposition after being compounded with MXene.
Referring to fig. 2, further, the effect of PAAS content on the humidity response sensitivity of the humidity sensor was measured. 0mg, 1mg, 2mg, 3mg and 4mg PAAS were added to obtain MXene/PAAS complex solutions with different PAAS contents, and the relative humidity of 7% was used as the reference humidity condition of the humidity sensor under the condition of the relative humidity of 7%. The corresponding resistance responses were measured to be 210%, 800%, 1124%, 1080%, 880%, respectively. The mass ratio of the polymer PAAS to the two-dimensional material MXene is 1:10, the sensitivity of the conductive material is highest.
To further derive the effect of PAAS content on the humidity response sensitivity of the humidity sensor. Under the condition of 50% relative humidity, the response/recovery time of the PAAS resistance added with 2mg is 1.5s and 1.2s respectively, and the response/recovery time of the PAAS added with 3mg is 3.2s and 3.3s respectively, because the added PAAS is excessive, the expansion speed of the film is slowed down due to the excessive PAAS content when water is absorbed, and the shrinkage recovery capability of the film is weakened due to the confinement effect of the PAAS on water molecules when water is removed. The mass ratio of PAAS to MXene is found to be 1 by comparison: there is a faster response speed at 10.
Further, the embodiment discloses a sensing unit of a humidity sensor, wherein a substrate layer made of an insulating material is coated with a conductive material formed by mixing high polymer sodium polystyrene and a two-dimensional material MXene. The substrate layer is sheet-like. And the conductive material may be coated on one or both sides of the base layer. A conductive electrode is provided at each of opposite ends of the coated conductive material so that each side of the coated conductive material forms a separate sensing element. The substrate layer adopted in the embodiment is a flexible PET substrate, and the thickness is only 0.075mm, so that the substrate layer has good flexibility and bendability.
Referring to fig. 1, further, this embodiment discloses a sensing end of a humidity sensor, which adopts the sensing unit described above, and further includes a hydrophobic layer and a packaging layer made of a waterproof material, wherein the packaging layer wraps the hydrophobic layer, the hydrophobic layer wraps the humidity sensing unit, the hydrophobic layer is made of a hydrophilic material, and a hydrophobic material is coated at a position corresponding to the humidity sensing unit to form a hydrophobic structure, a water guiding structure for guiding water is arranged on the hydrophobic structure, and a hollow is arranged at a corresponding position of the water guiding structure on the packaging layer. Wherein the hydrophobic layer of this example was made of fabric and was treated with a hydrophobic SiO 2 solution at a concentration of 2% wt to form a hydrophobic structure. The encapsulation layer is made of Polydimethylsiloxane (PDMS) film. In the embodiment shown in fig. 1, only one side of the substrate layer is coated with a conductive material and provided with a conductive electrode, so that only one side of the hydrophobic layer is provided with a water guiding structure, and the side provided with the water guiding structure faces to a position where humidity sensing is required in use. If both sides are coated with conductive materials, the corresponding hydrophobic layers are provided with water guide structures on both sides, so that humidity sensing can be performed on both sides.
Further, the water guiding structure of this embodiment is a water transporting line structure, and in this embodiment, 8 water absorbing lines, such as cotton lines or other fabric lines, which are equally spaced on the hydrophobic structure and treated with hydrophilic solution are used. The hydrophilic SiO 2 solution used in the wick was 3% by weight. The gradient balance of wetting may accelerate liquid transport. Thus, the sensor is matched with the hydrophobic layer, the sensing unit can be effectively protected from directly contacting with liquid, and accumulated skin sweat can be transported to a hydrophilic area of the fabric of the hydrophobic layer, so that the humidity sensor can complete measurement. The provision of a hydrophobic layer firstly allows the device to be relatively breathable and to be well protected against dominant perspiration from the skin and external liquid ingress, and also allows the transport of skin perspiration accumulation through cotton threads to the hydrophilic area. And secondly, the packaging layer is prevented from being damaged due to direct contact with the MXene/PAAS compound film under the condition of complex human skin bending.
Further, this embodiment also discloses a humidity sensor, adopts humidity sensor's sensing end, still includes wireless module, and wireless module passes through the wire and is connected with the conductive electrode electricity on humidity sensor's the sensing end, and wireless module includes thing networking main control chip, digital analog conversion chip and resistance bleeder circuit, and the signal of telecommunication that conductive electrode transmitted is through resistance bleeder circuit transmission to digital analog conversion chip to send to thing networking main control chip after the conversion in order to upload. And a wireless module is simultaneously connected with the sensing ends of the two humidity sensors at least. The resistive divider circuit is used for converting the sensor resistance signal into a voltage signal. The wireless module of the embodiment simplifies a circuit on the original Wemos D mini development edition and adds an AD sampling chip, and only uses an ESP8266 chip to communicate with the AD chip through an I2C protocol. The defect that the original ESP chip has only one analog signal channel is overcome, and a plurality of channels are expanded. And the wireless module directly uses an ESP8266 chip as a main control chip, so that a USB-UART circuit, a voltage-stabilizing power supply circuit and a switch reset circuit are reduced, and the area of the whole circuit is reduced to 3cm by 2cm.
Further, this embodiment also discloses a humidity transducer for sweat rate detects, adopts humidity transducer, still includes the gauze mask, and humidity transducer's sensing end has been buried in the position that corresponds mouth and nose department in the gauze mask, and wireless module has been buried in the position that corresponds cheek department in the gauze mask. The gauze mask that this embodiment adopted is the N95 gauze mask, and the humidity transducer who makes like this can realize the normal position collection and the wireless WiFi mode transmission of data.
The embodiment also discloses a manufacturing method of the conductive material, which is obtained by directly mixing the high polymer sodium polystyrene with the two-dimensional material MXene according to the mass ratio of 1:20-1:5. The mass ratio of the sodium polystyrene polymer to the two-dimensional material MXene is preferably 1:10.
The embodiment also discloses a manufacturing method of the sensing unit of the humidity sensor, which comprises the following steps:
Step 1, cutting the PET film into squares with the diameter of 10 multiplied by 10mm, and putting the squares into deionized water and absolute ethyl alcohol for ultrasonic treatment for 10 minutes to ensure that the surfaces of the squares are dust-free and glossy. Then placing the mixture into a blast drying box at 60 ℃ for drying. A base layer is obtained. The cleaned square sheet of 10X 10mm PET was then pressed against the slide glass with forceps, and then conductive silver paste as a conductive substance was brushed with a thin-head brush along both right and left sides of the square PET, with a width of about 1mm. Then the conductive copper wire serving as the conductor is connected, and the conductive copper wire is put into a blast drying oven at 60 ℃ to be dried for 2 hours. And obtaining the conductive electrode.
And 2, coating conductive materials between the conductive electrodes on the two sides. Wherein the conductive electrode can be made on one side or both sides of the PET film as required, and the conductive material is correspondingly coated on one side or both sides. Wherein, in order to make the conductive material adhere to the PET film better, the PET film can be subjected to plasma hydrophilic treatment in advance, so that the conductive material can be combined with the PET film better.
The embodiment further discloses a manufacturing method of the sensing end of the humidity sensor, which comprises the following steps:
The hydrophobic layer was prepared, 0.789g of hydrophobic silica powder and 1.183g of hydrophilic silica powder were weighed, 50ml of absolute ethyl alcohol was measured respectively, and the hydrophobic silica powder and the hydrophilic silica powder were mixed and subjected to ultrasonic treatment by an ultrasonic crusher for 2 hours to obtain a hydrophobic/hydrophilic silica ethanol solution (2 wt%, 3 wt%) which was uniformly dispersed. Cutting the terylene cloth into a rectangle with the length of 24 multiplied by 18mm, firstly covering one surface of the cleaned terylene cloth with a layer of temporary structure cover plate which is provided with hollows at the positions corresponding to the size and the positions of the sensing units, then intermittently spraying the hydrophobic solution containing silicon elements or fluorine elements for 20 times to ensure that the terylene cloth in the hollowed-out area is super-hydrophobic, and then embedding eight cotton threads which are distributed at intervals and are treated by hydrophilic solution in the treated hydrophobic structure area for liquid transportation. If only one side of the PET film is provided with the conductive electrode and the conductive material, the other side of the fabric is subjected to the same region superhydrophobic treatment and cotton threads are not embedded. The side with the cotton thread structure faces the skin. If the conductive electrodes and conductive materials are arranged on both sides of the PET film, cotton threads are embedded on both sides of the fabric, namely both sides can face the skin.
And then manufacturing the packaging layer. The two-dimensional plan view of the sweat rate monitoring device can be designed through software, and then the designed graph is used for engraving on an acrylic plate with the thickness of 10 multiplied by 10cm by a CO 2 marking machine. In the engraving process, the power of the CO 2 marking machine is 10W, the scanning speed is 1200mm & s -1, and the frequency is set to 8KHz. The resulting sweat rate test device pattern was approximately 500 μm deep. And then washing the acrylic plate with the groove pattern of the sweat rate monitoring device by alcohol and distilled water respectively and drying by nitrogen.
The preparation method comprises the following steps of (1) pre-polymerizing PDMS and a curing agent according to a mass ratio of 10:1, mixing and stirring uniformly, and then placing into a vacuum box to remove bubbles in the vacuum box by using a vacuum pump. The PDMS mixture was then poured into the grooves of an acrylic plate and again bubble removed with a vacuum pump and dried at 80℃for 4h. And then taking off the packaging layer to obtain an upper cover plate and a lower cover plate which are used as packaging layers, and then ultrasonically cleaning and drying the packaging layer for standby.
And welding two electrodes of the MXene/PAAS humidity sensor with thin copper wires by using electric soldering irons respectively, and then clamping the two electrodes between two layers of flexible super-hydrophobic fabrics to form a sandwich structure of the super-hydrophobic fabric-the MXene/PAAS humidity sensor-the super-hydrophobic fabric. And (3) performing plasma high-grade treatment on the upper and lower cover plates of the prepared sweat rate monitoring device for 5min, and packaging the sandwich structure of the super-hydrophobic fabric-MXene/PAAS humidity sensor-super-hydrophobic fabric by using the upper and lower cover plates to form the sensing end of the humidity sensor.
The embodiment further discloses a manufacturing method of the humidity sensor, which is based on the sensing end of the humidity sensor manufactured by the method, and further comprises the following steps: and connecting the conductive electrode of the humidity sensor with the flexible wireless module through an interface to form a closed loop.
The embodiment further discloses a manufacturing method of the humidity sensor device for detecting the sweat rate, and the humidity sensor manufactured based on the method further comprises the following steps:
the sensing end of the humidity sensor is buried in the position corresponding to the mouth and nose in the mask, and the wireless module is buried in the position corresponding to the cheek in the mask, so that the humidity sensing device for detecting the sweat rate is obtained.
Referring to fig. 3, dynamic characteristics of time-resistance response under different relative humidity conditions. The relative humidity of 7% was used as a reference humidity condition for the humidity sensor, and then the test was performed sequentially from 20% to 80% relative humidity and from 80% to 20% relative humidity, wherein the test was continued for 15 seconds under each relative humidity condition. When the humidity sensor is switched from the relative humidity of 7% to other high humidity conditions, the resistance response quickly reaches a relatively stable value, exhibiting its rapid humidity sensing performance, and when switched back to the relative humidity of 7% condition again, the resistance response of the humidity sensor quickly returns to the original state. Furthermore, the resistive response when humidity conditions are from low level to high relative humidity conditions is substantially symmetrical to the resistive response from high relative humidity to low relative humidity, which illustrates that the MXene/PAAS humidity sensor has good stability of the resistive response under various different relative humidity conditions.
Referring to FIG. 4, the MXene/PAAS humidity sensor was tested under four temperature conditions of 19 ℃, 28 ℃,37 ℃, 40 ℃ and 45 ℃ respectively set under air humidity conditions (relative humidity about 45%). When the temperature is 19 ℃, the resistance response of the MXene/PAAS humidity sensor is the same as that of a normal condition, the resistance response has higher response performance, and the resistance response value can reach 152% after three continuous tests. As the temperature increases, the resistance response of the MXene/PAAS humidity sensor decreases, and when the temperature increases to 45 ℃, the resistance response is only 21%. Notably, the response of the MXene/PAAS humidity sensor changed from 46.5% to 36.2% with a response change of only 10% when the temperature was increased from 37 ℃ to 40 ℃. Whereas the temperature of the human body does not vary by more than 40 c, the response of the MXene/PAAS humidity sensor is relatively small in the temperature range of 37 c to 40 c. Therefore, the MXene/PAAS humidity sensor has great application potential in monitoring the sweat rate of human skin.
Referring to fig. 5, fig. 5a is a view showing the sweat rate of the human arm after the combined exercise of running and push-up for 5 minutes. The MXene/PAAS humidity sensor was attached directly to the skin as a sweat rate monitoring device for real-time monitoring before the volunteer began to exercise. After the movement starts, the human body is known to have no heating phenomenon when the movement starts by a way of oral reporting, the human body has obvious heat feeling after the continuous movement for 3min, the sweat rate monitoring device starts to have resistance change, then the movement continues for 2min, the resistance change value continues to rise until the resistance change value starts to decline and returns to the initial state after 7-8kΩ. Figures 5b and 5c monitor the sweats of the forehead and back, respectively, of a human body after exercise. As described above, the volunteer did a combined exercise of running and push-up for 5min, respectively, and it was found that the sweat rate monitoring device started to have an increase in resistance value when the volunteer moved to 3min on both the forehead and back of the human body. The resistance change value of the sweat rate monitor device was still rising after the volunteer completed the 5min exercise, which indicated that the volunteer was in a hot state and the sweat rate was also rising. It was then found that the resistance change values of the test forehead and the back sweat rate monitoring device began to decrease after reaching 19-20kΩ and 17-18kΩ, respectively, until the initial state was restored. In addition, it was found through experiments that the resistance change value of the sweat rate monitoring device is approximately the same after two identical movements of the arms, forehead and back of the human body. By simulating the linear relation between the sweat rate and the resistance change value, the resistance change value of the sweat rate monitoring device, which is tested on the arms, forehead and back of the human body, is converted into sweat rate information of the human body, and the maximum sweat rate of the arms of the volunteer is 57g/m 2 & h, the maximum sweat rate of the forehead is 112g/m 2 & h and the maximum sweat rate of the back is 104g/m 2 & h through analysis. This demonstrates that the sweat rate monitoring device prepared in this example has good monitoring repeatability and reliability.
Referring to fig. 6, fig. 6a shows that when the humidity sensor is applied to a hydrophilic fabric under the condition that the air humidity is 45%, the tunneling resistance of the humidity sensor increases as the sweat amount of the volunteer increases, and when the sweat amount increases to be able to wet the fabric, the sweat directly contacts the sensor, and the signal transmitted from the computer terminal through the flexible wireless module indicates that the sensor is damaged. Fig. 6b shows that when the super-hydrophobic fabric is used as the lower layer of the humidity sensor under the same humidity condition, the super-hydrophobic structure effectively protects the humidity sensor when sweat increases to a certain amount, and the tunneling resistance increases first and then gradually and finally decreases again along with the evaporation resistance of sweat, so that a complete measurement is completed. In consideration of accumulation of sweat on the superhydrophobic surface, eight hydrophilic cotton threads are embedded on the superhydrophobic structure, accumulated sweat can be transported to a hydrophilic area, and measurement of the sensor under complex conditions is guaranteed.
Referring to fig. 7, fig. 7a shows the real-time monitoring of breathing of volunteers in different exercise states by placing an MXene/PAAS humidity sensor in a mask as a human breathing monitoring device. The resistance of the MXene/PAAS humidity sensor instantaneously increases when the volunteer exhales from the nose, because the moisture content of the gas exhaled from the human nose is much greater than the moisture content of the environment. When the volunteer inhales, the gas with smaller external moisture content enters the N95 mask to replace the gas with higher moisture content, and the process is relatively quick, so that the resistance of the MXene/PAAS humidity sensor is instantaneously restored to the initial state. When the volunteer breathes in a normal state during normal walking, three clear and identical-outline electricity drag hump appears by intercepting the resistance change of 10s from the resistance information recorded by the human respiration monitoring device, which indicates that the volunteer breathes for 3 times in 10s under normal conditions. The volunteer then began running with an increase in the number of electricity drag hump in 10s, indicating a significant increase in respiratory rate. And after the volunteer sits down for a few minutes, the frequency of his breathing begins to slow down, returning to the original normal level. When the volunteer had a deep rest after stepping down, the respiratory rate was significantly reduced. The volunteer breathes slowly from normal respiration level to the quickening of breathing to normal respiration, and the breathing information recorded by the human respiration monitoring device in the whole process is very clear, so that the device has good stability in the respiration monitoring process. Finally, the duration of exhalation was summarized as being 2.3s, 1s, 2.2s and 3.7s, respectively, and the duration of inhalation was 1.2s, 0.7s, 1.1s and 2.5s, respectively, for the volunteers in the normal state, running state, rest and lying down to a deep rest. According to formula R res＝60/(Tex+Tin) wherein R res represents the respiratory rate, T ex represents the exhalation interval, and T in represents the inhalation interval. The breathing rate of the volunteers at normal state, running state, resting and lying down to a deep resting was thus 16min -1、38min-1、17min-1 and 10min -1. These results indicate that the MXene/PAAS humidity sensor has great potential for monitoring human breath in real time.
Fig. 7b shows that the volunteer serially speaks "Humidity" and "Sensor" twice against the MXene/PAAS humidity Sensor, and as a result, the MXene/PAAS humidity Sensor clearly and completely records the voice information of the volunteer speaking. The three resistance peaks recorded in the volunteer 'Humidity's speaking were in a stepwise decreasing trend, while in the two 'Sensor's speaking, the three resistance peaks recorded by the MXene/PAAS humidity Sensor were at substantially the same resistance level. The MXene/PAAS humidity sensor disclosed in the embodiment can be used for human voice recognition because characteristic peaks of the resistors are different.
This example discloses that an MXene/PAAS wearable humidity sensor was prepared on a flexible two-electrode PET substrate using a drop coating method with response/recovery times of 1.5s and 1.2s, respectively, and a maximum resistance response of 1124%. The humidity sensor disclosed by the embodiment not only can detect the sweat rate conditions of the human body in different motion states, but also can be applied to detection of human body breathing parameters, voice recognition and the like. Meanwhile, the method has the characteristics of simple processing and preparation, low production cost, good stability and the like.
Claims (10)
1. The humidity-sensitive conductive material is characterized by being formed by mixing high molecular polymer sodium polystyrene and a two-dimensional material MXene;
the mass ratio of the high polymer sodium polystyrene to the two-dimensional material MXene is 1:20-1:5.
2. The sensing end of the humidity sensor is characterized by comprising a substrate layer and conductive electrodes, wherein the substrate layer is made of an insulating material, the wet-sensitive conductive material is paved on at least one of two sides of the substrate layer, humidity sensing units of one conductive electrode are respectively arranged on two sides of each of the wet-sensitive conductive materials, the humidity sensing end also comprises a hydrophobic layer and a packaging layer made of a waterproof material, the packaging layer wraps the hydrophobic layer, the humidity sensing units are wrapped in the hydrophobic layer, the hydrophobic layer is made of a hydrophilic material, a hydrophobic structure is formed by coating the hydrophobic material at the position corresponding to the humidity sensing units, a water guiding structure for guiding water is arranged on the hydrophobic structure, and hollow parts are arranged at the corresponding positions of the water guiding structure in the packaging layer.
3. The sensing terminal of claim 2, wherein the water guiding structure is a water transporting line structure comprising at least two water absorbing lines equally spaced on the water draining structure and treated with hydrophilic solution.
4. The humidity sensor is characterized by comprising a wireless module, wherein the wireless module is electrically connected with a conductive electrode on the sensing end of the humidity sensor through a wire, the wireless module comprises an Internet of things main control chip, a digital-to-analog conversion chip and a resistive voltage division circuit, and an electric signal transmitted by the conductive electrode is transmitted to the digital-to-analog conversion chip through the resistive voltage division circuit and is transmitted to the Internet of things main control chip for uploading after being converted; and a wireless module is simultaneously connected with the sensing ends of the two humidity sensors at least.
5. The humidity sensing device for detecting the sweat rate is characterized by further comprising a mask, wherein the sensing end of the humidity sensor is buried in the mask at a position corresponding to the mouth and nose, and a wireless module is buried in the mask at a position corresponding to the cheek.
6. The manufacturing method of the humidity-sensitive conductive material is characterized in that the humidity-sensitive conductive material is obtained by mixing high molecular polymer sodium polystyrene with a two-dimensional material MXene according to a mass ratio of 1:20-1:5.
7. The manufacturing method of the humidity sensing unit of the humidity sensor is characterized by comprising the following steps of:
step1, respectively coating conductive substances on two opposite sides of at least one surface of an insulating material serving as a substrate layer, and fixing a conductor on the conductive substances to obtain a conductive electrode;
step 2, coating the humidity-sensitive conductive material manufactured by the method of claim 6 between the conductive electrodes on two sides.
8. The manufacturing method of the sensing end of the humidity sensor is characterized by comprising the following steps of:
Step one, based on the area of a humidity sensing unit of the humidity sensor manufactured by the method of claim 7, spraying hydrophobic materials with the same area on hydrophilic materials to form a hydrophobic structure, and fixing a water guide structure on the hydrophobic structure to obtain a hydrophobic layer;
Step two, manufacturing a packaging layer with a two-layer structure by using a flexible material, and reserving hollowed-out parts corresponding to the positions of the water guide structures on the packaging layer;
And thirdly, sandwiching the humidity sensing unit of the humidity sensor manufactured by the method of claim 7 between two hydrophobic layers, and sandwiching the two hydrophobic layers between two packaging layers to form a sensing end of the humidity sensor.
9. A method for manufacturing a humidity sensor, wherein the sensing end of the humidity sensor manufactured by the method according to claim 8 further comprises the following steps:
The method comprises the steps that a conductive electrode at the sensing end of a humidity sensor and a wireless module are connected through a wire to form a loop, wherein the wireless module comprises an Internet of things main control chip, a digital-to-analog conversion chip and a resistive voltage dividing circuit, an electric signal transmitted by the conductive electrode is transmitted to the digital-to-analog conversion chip through the resistive voltage dividing circuit and is transmitted to the Internet of things main control chip after being converted for uploading; and the wireless module is simultaneously connected with the induction ends of the two humidity sensors at least.
10. A method for manufacturing a humidity sensor, characterized in that the humidity sensor manufactured based on the method according to claim 9 further comprises the steps of:
the humidity sensor is directly arranged on the surface of a human body and used as a humidity sensing device for detecting the sweat rate; or alternatively
The sensing end of the humidity sensor is buried in the position corresponding to the mouth and nose in the mask, and the wireless module is buried in the position corresponding to the cheek in the mask, so that the humidity sensing device for sweat rate detection or voice recognition is obtained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110976214.2A CN113804732B (en) | 2021-08-24 | 2021-08-24 | Wearable humidity sensing device for detecting human body sweat rate and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110976214.2A CN113804732B (en) | 2021-08-24 | 2021-08-24 | Wearable humidity sensing device for detecting human body sweat rate and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113804732A CN113804732A (en) | 2021-12-17 |
| CN113804732B true CN113804732B (en) | 2024-05-24 |
Family
ID=78941634
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110976214.2A Active CN113804732B (en) | 2021-08-24 | 2021-08-24 | Wearable humidity sensing device for detecting human body sweat rate and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113804732B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117030804B (en) * | 2023-10-10 | 2023-12-12 | 冰零智能科技(常州)有限公司 | Sensor and use method thereof |
Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204228657U (en) * | 2014-10-15 | 2015-03-25 | 南京皓运投资管理有限公司 | Sweat collection and analytic system |
| CN105300927A (en) * | 2015-10-22 | 2016-02-03 | 中国计量学院 | Optical fiber humidity sensor based on graphene oxide and polyvinyl alcohol composite film |
| CN106725490A (en) * | 2017-01-23 | 2017-05-31 | 中国科学院合肥物质科学研究院 | A kind of humidity sensor and the breathing detection system using the humidity sensor |
| CN109060923A (en) * | 2018-08-20 | 2018-12-21 | 浙江大学 | The body surface sweat electrochemical sensor and monitoring method of origami structure |
| CN109239139A (en) * | 2018-09-29 | 2019-01-18 | 厦门大学 | A kind of yam-like humidity sensor |
| CN109384194A (en) * | 2017-08-07 | 2019-02-26 | 张家港祥成医用材料科技有限公司 | A kind of preparation method of the non-solid phase biological pressure sensor of electronic skin |
| CN109799013A (en) * | 2019-01-28 | 2019-05-24 | 江南大学 | A kind of pressure resistance type flexible sensor and preparation method thereof |
| CN109803577A (en) * | 2016-08-08 | 2019-05-24 | 外分泌腺系统公司 | Biofluid sensing device with EAB integral biosensor |
| CN110289389A (en) * | 2019-05-09 | 2019-09-27 | 广东工业大学 | A kind of molybdenum disulfide/carbon nano-fiber composite material and the preparation method and application thereof |
| CN110672670A (en) * | 2019-10-18 | 2020-01-10 | 吉林大学 | Planar flexible room temperature NO based on three-dimensional MXene folded ball/ZnO composite material2Sensor and preparation method thereof |
| CN111198219A (en) * | 2020-02-19 | 2020-05-26 | 苏州微湃医疗科技有限公司 | Wearable biosensor for sweat detection |
| CN111366615A (en) * | 2020-03-26 | 2020-07-03 | 电子科技大学 | Humidity sensor based on thin nano-flake MXene niobium carbide and preparation method thereof |
| CN111678425A (en) * | 2020-05-22 | 2020-09-18 | 扬州大学 | Breathable and waterproof multi-response fabric sensor |
| KR20210053694A (en) * | 2019-11-04 | 2021-05-12 | 주식회사 엘지화학 | Polyaniline-polymer nanofiber composite and preparation method thereof |
| CN112964764A (en) * | 2021-02-05 | 2021-06-15 | 深圳市刷新智能电子有限公司 | Electrode for detecting sweat marker and sweat sensor |
| CN112999885A (en) * | 2021-02-18 | 2021-06-22 | 上海工程技术大学 | MXene-GO composite membrane with humidity response and preparation method and application thereof |
| CN113049637A (en) * | 2021-03-21 | 2021-06-29 | 徐州乾尚元生物科技有限公司 | Wireless wearable micro-sensing system for real-time detection of multiple pathogens and preparation method thereof |
| CN113203771A (en) * | 2021-04-27 | 2021-08-03 | 华中科技大学 | Humidity sensing fiber and preparation method and application thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11231384B2 (en) * | 2018-04-02 | 2022-01-25 | Bioconn Corporation | Humidity sensor |
-
2021
- 2021-08-24 CN CN202110976214.2A patent/CN113804732B/en active Active
Patent Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204228657U (en) * | 2014-10-15 | 2015-03-25 | 南京皓运投资管理有限公司 | Sweat collection and analytic system |
| CN105300927A (en) * | 2015-10-22 | 2016-02-03 | 中国计量学院 | Optical fiber humidity sensor based on graphene oxide and polyvinyl alcohol composite film |
| CN109803577A (en) * | 2016-08-08 | 2019-05-24 | 外分泌腺系统公司 | Biofluid sensing device with EAB integral biosensor |
| CN106725490A (en) * | 2017-01-23 | 2017-05-31 | 中国科学院合肥物质科学研究院 | A kind of humidity sensor and the breathing detection system using the humidity sensor |
| CN109384194A (en) * | 2017-08-07 | 2019-02-26 | 张家港祥成医用材料科技有限公司 | A kind of preparation method of the non-solid phase biological pressure sensor of electronic skin |
| CN109060923A (en) * | 2018-08-20 | 2018-12-21 | 浙江大学 | The body surface sweat electrochemical sensor and monitoring method of origami structure |
| CN109239139A (en) * | 2018-09-29 | 2019-01-18 | 厦门大学 | A kind of yam-like humidity sensor |
| CN109799013A (en) * | 2019-01-28 | 2019-05-24 | 江南大学 | A kind of pressure resistance type flexible sensor and preparation method thereof |
| CN110289389A (en) * | 2019-05-09 | 2019-09-27 | 广东工业大学 | A kind of molybdenum disulfide/carbon nano-fiber composite material and the preparation method and application thereof |
| CN110672670A (en) * | 2019-10-18 | 2020-01-10 | 吉林大学 | Planar flexible room temperature NO based on three-dimensional MXene folded ball/ZnO composite material2Sensor and preparation method thereof |
| KR20210053694A (en) * | 2019-11-04 | 2021-05-12 | 주식회사 엘지화학 | Polyaniline-polymer nanofiber composite and preparation method thereof |
| CN111198219A (en) * | 2020-02-19 | 2020-05-26 | 苏州微湃医疗科技有限公司 | Wearable biosensor for sweat detection |
| CN111366615A (en) * | 2020-03-26 | 2020-07-03 | 电子科技大学 | Humidity sensor based on thin nano-flake MXene niobium carbide and preparation method thereof |
| CN111678425A (en) * | 2020-05-22 | 2020-09-18 | 扬州大学 | Breathable and waterproof multi-response fabric sensor |
| CN112964764A (en) * | 2021-02-05 | 2021-06-15 | 深圳市刷新智能电子有限公司 | Electrode for detecting sweat marker and sweat sensor |
| CN112999885A (en) * | 2021-02-18 | 2021-06-22 | 上海工程技术大学 | MXene-GO composite membrane with humidity response and preparation method and application thereof |
| CN113049637A (en) * | 2021-03-21 | 2021-06-29 | 徐州乾尚元生物科技有限公司 | Wireless wearable micro-sensing system for real-time detection of multiple pathogens and preparation method thereof |
| CN113203771A (en) * | 2021-04-27 | 2021-08-03 | 华中科技大学 | Humidity sensing fiber and preparation method and application thereof |
Non-Patent Citations (4)
| Title |
|---|
| Hyosung An.Water Sorption in MXene/Polyelectrolyte Multilayers for Ultrafast Humidity Sensing.ACS Applied Nano Materials.2019,第948-955页. * |
| Semih Calamak.Sodium polyacrylate microparticle containing multifunctional skin patch for sweat analysis.Microchemical Journal.2020,第1-9页. * |
| Sodium polyacrylate microparticle containing multifunctional skin patch for sweat analysis;Semih Calamak;Microchemical Journal;第1-9页 * |
| Water Sorption in MXene/Polyelectrolyte Multilayers for Ultrafast Humidity Sensing;Hyosung An;ACS Applied Nano Materials;第948-955页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113804732A (en) | 2021-12-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Tai et al. | Evolution of breath analysis based on humidity and gas sensors: Potential and challenges | |
| US11191472B2 (en) | Sweat absorbing textile electrode | |
| Yang et al. | All-fabric-based multifunctional textile sensor for detection and discrimination of humidity, temperature, and strain stimuli | |
| CN113804732B (en) | Wearable humidity sensing device for detecting human body sweat rate and manufacturing method thereof | |
| JP7289474B2 (en) | Biometric data measuring device | |
| Balakrishnan et al. | Based electronics using graphite and silver nanoparticles for respiration monitoring | |
| CN111735858A (en) | Self-heatable laser-induced graphene flexible NO2Preparation method of gas sensor | |
| KR101331858B1 (en) | Smart pants for measuring movement signal of muscle | |
| Xue et al. | Superhydrophobic, stretchable kirigami pencil-on-paper multifunctional device platform | |
| CN110068397A (en) | A kind of flexibility body temperature transducer and preparation method thereof | |
| US20200060541A1 (en) | Biosensor for detecting biological fluid | |
| Song et al. | High-sensitivity paper-based capacitive humidity sensors for respiratory monitoring | |
| Caccami et al. | An epidermal graphene oxide-based RFID sensor for the wireless analysis of human breath | |
| CN110285898A (en) | Pliable pressure sensing device and its manufacturing method based on carbon black dust-free paper | |
| Chen et al. | Ultra‐Lightweight, Highly Permeable, and Waterproof Fibrous Organic Electrochemical Transistors for On‐Skin Bioelectronics | |
| CN108294747A (en) | Aligned carbon nanotube adheres to dry electrode and its preparation process certainly | |
| CN214844940U (en) | Sweat sensor and sweat sensing system | |
| Sinha et al. | Wearable humidity sensor embroidered on a commercial face mask and its electrical properties | |
| CN109452934A (en) | A kind of preparation method of the sticking type skin sensor based on graphene | |
| Noushin et al. | Kirigami-patterned highly stable and strain insensitive sweat pH and temperature sensors for long-term wearable applications | |
| JP6933937B2 (en) | Moisture sensitive sheet and moisture sensitive system | |
| Liu et al. | A reversible gel-free electrode for continuous noninvasive electrophysiological signal monitoring | |
| CN117468238A (en) | Flexible wearable thermosensitive fiber and preparation method and application thereof | |
| Nguyen et al. | Stretchable, skin-breathable, and ultrasensitive respiration sensor using graphite on paper with smart structures | |
| CN111430060A (en) | Silk flexible electrode and manufacturing method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |