CN116196568A - Dustproof mask with respiration monitoring function - Google Patents

Abstract

The application discloses a dustproof mask with a respiration monitoring function, which comprises a dustproof mask body, a respiration sensor, a power circuit, a power supply unit, a monitoring processing module, a data transmission module and a mobile terminal; the monitoring processing module is electrically connected with the respiration sensor, the power supply circuit and the data transmission module; the dustproof mask body is provided with a first filter cotton and a second filter cotton, the respiration sensor is obtained by embroidering conductive cotton threads on the second filter cotton, and the preparation method of the conductive cotton threads comprises the following steps of: (1) pretreatment: (2) Soaking cotton threads in a PEDOT (polyether-ether-ketone) PSS solution, adding polyol and a cross-linking agent, fully reacting and drying; (3) And (3) placing the cotton thread obtained in the step (2) in a DMSO solvent for soaking for the third time, and drying to obtain the conductive cotton thread. The respiration sensor is matched with the power supply unit, the power supply circuit, the monitoring processing module and the data transmission module, respiration data are displayed on the mobile terminal, and a portable, real-time, reliable and low-cost monitoring means is provided.

Description

A dust-proof mask with the function of monitoring breathing

technical field

The application relates to a dustproof mask with the function of monitoring breathing, which belongs to the technical field of smart wearable devices.

Background technique

Breathing is one of the three important signals of human vital signs, and it has extremely important reference value in human physiological monitoring. Many diseases can cause changes in breathing rate and depth, such as coronavirus infection, bronchitis and other diseases. On the other hand, pneumoconiosis is the occupational disease with the largest number of patients and the most serious hazard in my country. Workers are immersed in dust-filled environments for a long time, and the inhaled industrial dust will cause irreversible and permanent damage to the lungs. Therefore, it is of great significance to realize real-time monitoring of the respiratory health status of workers in a dusty environment.

Common respiration rate measurement methods require the help of pressure sensors to detect expansion and contraction of the chest; thermal sensors use temperature changes between inspiratory and expiratory airflows to monitor respiration; onboard ultrasound is also used to detect airflow-induced The speed of sound changes. However, the above-mentioned traditional respiratory monitors have disadvantages such as low comfort, poor portability, and high price, and cannot be applied in actual operation scenarios.

Contents of the invention

In order to solve the above problems, a dust-proof mask with the function of monitoring breathing is provided. By preparing conductive cotton thread and embroidering the conductive cotton thread on the second filter cotton, a breathing sensor is formed, which cooperates with a power supply unit, a power supply circuit, a monitoring processing module and The data transmission module presents the respiratory data on the mobile terminal, providing a portable, real-time, reliable and low-cost monitoring means. This application can monitor the respiratory indicators of the staff in real time and accurately, and at the same time detect the failure of the dust-proof filter cotton and remind the staff to replace the dust-proof filter cotton in time, prevent and monitor diseases through new technologies, and protect the health of the staff .

According to one aspect of the present application, there is provided a kind of dustproof mask with monitoring breathing function, comprising dustproof mask body, breathing sensor, power supply circuit, power supply unit, monitoring processing module, data transmission module and mobile terminal; Said monitoring processing The module is electrically connected with the breathing sensor, the power circuit and the data transmission module; the monitoring processing module is wirelessly connected with the mobile terminal through the data transmission module; the dustproof mask body is provided with a first filter cotton and a second filter cotton, and the first filter cotton The cotton is arranged outside the second filter cotton;

The breathing sensor is obtained by embroidering conductive cotton thread on the second filter cotton, and the preparation method of the conductive cotton thread comprises the following steps:

(1) Pretreatment: Put the cotton thread in the aqueous solution of detergent, soak it for the first time, wash it with deionized water and dry it; continue to put it in the aqueous solution of bleach, soak it for the second time, and wash it with deionized water clean, dry

(2) immerse the pretreated cotton thread in PEDOT:PSS solution, add polyhydric alcohol and crosslinking agent, dry after fully reacting;

(3) placing the cotton thread obtained in step (2) in DMSO solvent for the third soaking, and drying to obtain the conductive cotton thread.

This application prepares conductive cotton thread, embroiders the conductive cotton thread on the second filter cotton to form a respiratory sensor, cooperates with the power supply unit, power circuit, monitoring processing module and data transmission module, and presents the respiratory data on the mobile terminal, realizing the wearable The mask can monitor breathing conveniently and in real time.

Optionally, the monitoring and processing module includes a signal acquisition and amplification circuit, a filter, an ADC, and a single-chip microcomputer; the data transmission module includes Bluetooth.

Optionally, the power supply circuit is electrically connected to the power supply unit, so as to provide the working voltage required by the respiration sensor and the monitoring processing module through the power supply circuit.

Optionally, the mask with the function of monitoring breathing is also provided with an indicator light to show the working status of the mask.

In this application, the indicator light is electrically connected to the monitoring and processing module, and the monitoring and processing module performs required indications, such as alarm indications, etc. through the indicator light.

Optionally, the first soaking temperature is 70°C-80°C, and the soaking time is 2h-2.5h; the second soaking time is 5h-6h.

Optionally, the bleaching agent is an aqueous solution of sodium hydroxide and sodium hypochlorite.

Optionally, the polyhydric alcohol is sorbitol; the crosslinking agent is 3-triglyceride glycidyltrimethoxysilane.

Optionally, the third soaking time is 1h-1.5h.

Optionally, in the PEDOT:PSS solution, the mass ratio of PSS to PEDOT is 2-3:1.

Specifically, in the PEDOT:PSS solution, the mass ratio of PSS to PEDOT can be 2:1, 2.1:1, 2.2:1, 2.3:1, 2.4:1, 2.5:1, 2.6:1, 2.7 :1, 2.8:1, 2.9:1, or 3:1.

Optionally, the mass fraction of the sorbitol is 6%-8%; the mass fraction of the cross-linking agent is 3%-6%.

The beneficial effects of this application include but are not limited to:

1. According to the dust-proof mask with the function of monitoring breathing provided by this application, a breathing sensor is formed by preparing conductive cotton thread and embroidering the conductive cotton thread on the second filter cotton, and cooperates with the power supply unit, power circuit, monitoring processing module and data transmission The module presents respiratory data on a mobile terminal, providing a portable, real-time, reliable, and low-cost monitoring method.

2. According to the dust-proof mask with the function of monitoring breathing provided by the present application, two conductive cotton threads are interlacedly embroidered on the second filter cotton to obtain two electrodes, which jointly form a breathing sensor. By interlacing two conductive cotton threads, on the one hand, it can effectively increase the area of the electrode and the signal-to-noise ratio, and improve the signal quality; Monitor sensitivity.

3. According to the dust-proof mask with the function of monitoring breathing provided by this application, the conductive cotton thread is prepared by a specific method. After the first soaking and second soaking, the pretreatment can effectively reduce the impurities on the surface of the cotton thread and increase the reaction on the cotton thread site to improve the adhesion of the conductive dye on the surface of the cotton thread, so that the conductive dye is evenly and densely coated on the cotton thread; by impregnating the PEDOT:PSS solution doped with polyols and cross-linking agents, the conductivity and mechanical properties of the conductive cotton thread can be effectively improved Performance; Finally, the conductive cotton thread is soaked in DMSO solvent for the third time, which can wash away the non-conductive PSS and residual polyols, and further improve the conductivity of the conductive cotton thread.

4. According to the dust-proof mask with the function of monitoring breathing provided by this application, the difference in humidity produced by people's exhalation and inhalation is used, that is, when exhaling, the gas is moist, which will increase the moisture content on the conductive cotton thread, and vice versa , when inhaling, it will reduce the moisture content on the conductive cotton thread; when the electrode of the conductive cotton thread is energized, the moisture adsorbed on the conductive cotton thread is electrolyzed into H ⁺ and OH ^- , which causes the resistance to change during inhalation and exhalation , the moisture increases, the movable ions produced by the electrolysis of water increase, and the resistance decreases. By applying a DC signal to the conductive cotton wire electrode, the resistance can be converted into a voltage signal through the Wheatstone bridge method, and the respiratory data can be presented on the mobile terminal with the monitoring and processing module and the data transmission module, providing a portable, real-time, Reliable, low-cost monitoring means.

5. According to a kind of dust-proof respirator with the function of monitoring breathing provided by this application, by adding a specific proportion of sorbitol in the process of preparing conductive cotton thread, after adding, the conformation of PEDOT:PSS will change, from entangled coils to The linear or expanded coil structure causes the units adjacent to thiophene on the PEDOT molecular chain to adopt an isotropic planar structure. The quinone structure in the molecular structure increases, and the electron delocalization ability is enhanced, which improves the carrier migration, thereby increasing the conductivity. .

Description of drawings

The drawings described here are used to provide a further understanding of the application and constitute a part of the application. The schematic embodiments and descriptions of the application are used to explain the application and do not constitute an improper limitation to the application. In the attached picture:

Fig. 1 is the side-view three-dimensional structure schematic diagram of the dust-proof mask with monitoring respiration function involved in the application;

Fig. 2 is the main view three-dimensional structural schematic diagram of the dustproof respirator with monitoring breathing function involved in the present application;

Fig. 3 is the side-view three-dimensional structural schematic diagram after the first filter cotton is taken off of the dust-proof respirator with monitoring breathing function involved in the present application;

Fig. 4 is the schematic diagram of the three-dimensional structure of the front view after the first filter cotton is removed from the dust-proof mask with the function of monitoring breathing involved in the present application;

FIG. 5 is a structural block diagram of the coordination of each module unit involved in Embodiment 1 of the present application;

Fig. 6 is the voltage signal diagram of the dustproof respirator with monitoring respiration function involved in embodiment 1 of the present application under different respiration states;

FIG. 7 is a diagram of the conductive cotton thread embroidery electrode involved in Embodiment 1 of the present application;

FIG. 8 is a schematic diagram of the working process of the dust-proof mask with the function of monitoring breathing according to Embodiment 1 of the present application.

Reference signs:

1. Dust mask body; 2. Ear straps; 3. Second filter cotton; 4. Conductive cotton thread; 5. First filter cotton.

Detailed ways

The present application is described in detail below in conjunction with the examples, but the present application is not limited to these examples.

Unless otherwise defined, all professional and scientific terms used herein have the same meanings as commonly understood by those skilled in the art. The reagents or raw materials used in the present invention can be purchased through conventional channels. Unless otherwise specified, the reagents or raw materials used in the present invention are used in accordance with conventional methods in the art or according to product instructions. In addition, any methods and materials similar or equivalent to those described can be applied to the method of the present invention. The preferred implementation methods and materials described in this patent are for demonstration purposes only.

Example 1

Referring to Figures 1 to 8, Embodiment 1 of the present application discloses a dustproof mask with the function of monitoring breathing, including a dustproof mask body 1, a breathing sensor, a power circuit, a power supply unit, a monitoring processing module, a data transmission module and Mobile terminal; the monitoring processing module is electrically connected to the breathing sensor, power circuit and data transmission module; the monitoring processing module is wirelessly connected to the mobile terminal through the data transmission module; the dustproof mask body 1 is provided with a first filter cotton 5 and a second filter cotton 3 , the first filter cotton 5 is arranged outside the second filter cotton 3;

Specifically, the specific form of the dust mask body can be selected according to actual conditions. Generally, the two ends of the dust mask body 1 are provided with ear straps 2, so that the dust mask body 1 can be worn on the head, and the matching form of the ear straps 2 and the dust mask body 1 can be determined by those skilled in the art according to The selection is made according to the actual situation, and this application does not make specific limitations.

Specifically, the present application embroiders the conductive cotton thread 4 on the second filter cotton 3, the filtering performance of the first filter cotton 5 decreases or becomes invalid during the working process, and after the dust enters the dustproof mask body 1 through the first filter cotton 5, it pollutes the second filter cotton. The second filter cotton 3 and the breathing sensor, and then the receiving signal of the breathing sensor is affected, and an early warning is issued through the monitoring processing module and the indicator light.

Specifically, the first filter cotton 5 is arranged outside the second filter cotton 3 to filter industrial dust.

The monitoring and processing module includes a signal acquisition and amplification circuit, a filter, an ADC and a single-chip microcomputer; the data transmission module includes bluetooth.

Specifically, the single-chip microcomputer collects and records the implementation voltage signal, and the signal acquisition amplifier amplifies and processes the voltage signal collected by the single-chip microcomputer.

The power supply circuit is electrically connected with the power supply unit so as to provide the working voltage required by the respiration sensor and the monitoring processing module through the power supply circuit.

Specifically, the power supply unit includes a lithium battery or a solar battery.

The mask with the function of monitoring breathing is also equipped with an indicator light to show the working status of the mask.

Specifically, those skilled in the art can select the form of the indicator light according to the actual situation, which is not specifically limited in this application.

Further, those skilled in the art can also adopt alarm forms such as buzzer according to the actual situation.

Specifically, the breathing frequency is calculated according to the position of the peak and the valley of the breathing curve waveform, and the calculation of the breathing frequency generally takes 30 seconds. A normal person usually has a respiratory rate of 16-24 breaths/minute, and if it is lower than 10 breaths/minute, it usually indicates that the patient's respiratory rate slows down. If it exceeds 24 breaths/minute, it usually indicates that the patient has shortness of breath.

For the breathing curve graph, the process of exhalation corresponds to the rising edge of the curve, that is, the peak, and the process of inhalation corresponds to the falling edge of the curve, that is, the trough. According to the sampling frequency f _s of the respiration sensor and the point interval N between the troughs, the respiration frequency f can be obtained, and the calculation formula is: f=60*f _s /N.

Specifically, in practical applications, the average value of multiple calculations may be taken as the average respiratory rate as the judgment parameter.

Further, in the monitoring processing module, set the highest and lowest two thresholds of respiratory frequency, when the measured respiratory frequency f is greater than the highest threshold, or less than the lowest threshold, an alarm will be triggered, and the system will give corresponding suggestions through data analysis, For example health advice or a recommendation to change the filter.

A working process of a dust mask with a breathing monitoring function is as follows:

A dust-proof mask with the function of monitoring respiration. The respiration signal is obtained through a respiration sensor and a monitoring processing module, and the collected respiration signal is processed, and then the respiration signal is transmitted to a mobile terminal through a data transmission module. If the breathing curve can be obtained, record and analyze the breathing curve. If the breathing curve reflects that the person is in a certain sub-health state, the mobile terminal app or indicator light will send out an alarm; Whether the dust-proof mask of the dustproof mask is due to the failure of the first filter cotton 5, which affects the normal operation of the breathing sensor on the second filter cotton 3, it is recommended to replace the first filter cotton 5 in time.

The preparation of embodiment 2 conductive cotton thread 1#

(1) Pretreatment: Put the cotton thread in the aqueous solution of detergent, soak it for the first time, the temperature of the first soaking is 70°C, the soaking time is 2h, wash it with deionized water and dry it; continue to add sodium hydroxide In the aqueous solution of sodium hypochlorite, carry out second immersion, immersion time 5h, wash with deionized water, dry;

(2) Immerse the pretreated cotton thread in PEDOT:PSS solution, wherein the mass ratio of PSS to PEDOT is 2:1, add sorbitol and crosslinking agent 3-triglyceride glycidyltrimethoxysilane , the mass fraction of sorbitol is 6%; the mass fraction of cross-linking agent is 3%, and drying after fully reacting;

(3) Put the cotton thread obtained in step (2) into DMSO solvent for the third soaking time for 1 hour, and dry to obtain conductive cotton thread 1#.

The preparation of embodiment 3 conductive cotton thread 2#

(1) Pretreatment: Put the cotton thread in the aqueous solution of detergent, soak it for the first time, the temperature of the first soaking is 80°C, the soaking time is 2.5h, wash it with deionized water and dry it; In an aqueous solution of sodium and sodium hypochlorite, soak for the second time for 6 hours, wash with deionized water, and dry in the air;

(2) Immerse the pretreated cotton thread in PEDOT:PSS solution, wherein the mass ratio of PSS to PEDOT is 3:1, add sorbitol and crosslinking agent 3-triglyceride glycidyltrimethoxysilane , the mass fraction of sorbitol is 7%; the mass fraction of cross-linking agent is 6%, and it is dried after fully reacting;

(3) Put the cotton thread obtained in step (2) into DMSO solvent for the third soaking time for 1.5 hours, and dry to obtain conductive cotton thread 2#.

The preparation of embodiment 4 conductive cotton thread 3#

(1) Pretreatment: Put the cotton thread in the aqueous solution of detergent, soak it for the first time, the temperature of the first soaking is 75°C, the soaking time is 2.5h, wash it with deionized water and dry it; In an aqueous solution of sodium and sodium hypochlorite, soak for the second time for 6 hours, wash with deionized water, and dry in the air;

(2) Immerse the pretreated cotton thread in PEDOT:PSS solution, wherein the mass ratio of PSS to PEDOT is 2.3:1, add sorbitol and crosslinking agent 3-triglyceride epoxypropyltrimethoxysilane , the mass fraction of sorbitol is 8%; the mass fraction of cross-linking agent is 5%, and drying after fully reacting;

(3) Place the cotton thread obtained in step (2) in DMSO solvent for the third soaking time for 1.5 hours, and dry to obtain conductive cotton thread 3#.

Preparation of comparative example 1 conductive cotton thread D1#

The difference between Comparative Example 1 and Example 3 is that they are not pretreated in step (1), and the rest are the same.

The preparation of comparative example 2 conductive cotton thread D2#

The difference between Comparative Example 2 and Example 3 is that they are not processed in step (3), and the rest are the same.

Preparation of comparative example 3 conductive cotton thread D3#

The difference between Comparative Example 2 and Example 3 is that the added alcohol is ethylene glycol, and the rest are the same.

Experimental example 1

The electrical conductivity of the conductive cotton thread obtained in Examples 2-4 and Comparative Examples 1-3 was measured, and the results are shown in the table below.

Table 1 Conductivity results

Conductive cotton thread Conductivity (S/cm) Conductive cotton thread 1# 997 Conductive cotton thread 2# 945 Conductive cotton thread 3# 1021 Conductive cotton thread D1# 863 Conductive cotton thread D2# 852 Conductive cotton thread D3# 926

From the above data, it can be seen that the conductivity of the conductive cotton threads 1# to 3# obtained in Examples 2 to 4 is better than that of the conductive cotton threads D1# to D3#, and the conductive cotton thread 3# is the best, reaching 1021S/cm.

The conductivity of conductive cotton thread D1# is 863S/cm, which is lower than that of conductive cotton thread 1#~3#. There are impurities, and there are few reaction sites on the cotton thread, and the adhesion of the conductive dye on the surface of the cotton thread is reduced, so that the conductive dye is coated unevenly on the cotton thread, thereby reducing the conductivity.

The conductivity of the conductive cotton thread D2# is 852S/cm, which is lower than that of the conductive cotton thread 1#~3#. As a result, non-conductive PSS and residual polyols exist on the surface of the conductive cotton thread, which affects the conductivity of the conductive cotton thread.

The conductivity of conductive cotton thread D3# is 926S/cm, which is lower than that of conductive cotton thread 1#~3#. The reason for the analysis is that sorbitol is not added to conductive cotton thread D3#, but ethylene glycol and sorbitol are added. The stronger hydrophilicity of PEDOT is more conducive to the interaction between PSS and alcohol, resulting in weakening the interaction between PEDOT and PSS, promoting the crystallization of PEDOT, which is conducive to improving the conductivity.

The foregoing descriptions are merely examples of the present application, and the protection scope of the present application is not limited by these specific examples, but is determined by the claims of the present application. For those skilled in the art, various modifications and changes may occur in this application. Any modifications, equivalent replacements, improvements, etc. made within the technical ideas and principles of this application shall be included within the scope of protection of this application.

Claims (10)

1. The dustproof mask with the respiratory monitoring function is characterized by comprising a dustproof mask body, a respiratory sensor, a power circuit, a power supply unit, a monitoring processing module, a data transmission module and a mobile terminal; the monitoring processing module is electrically connected with the respiration sensor, the power circuit and the data transmission module; the monitoring processing module is in wireless connection with the mobile terminal through the data transmission module; the dustproof mask body is provided with a first filter cotton and a second filter cotton, and the first filter cotton is arranged on the outer side of the second filter cotton;

the respiration sensor is obtained by embroidering conductive cotton threads on second filter cotton, and the preparation method of the conductive cotton threads comprises the following steps:

(1) Pretreatment: placing cotton threads into aqueous solution of a detergent, soaking for the first time, washing with deionized water, and airing; continuously putting the mixture into a bleaching agent aqueous solution, soaking the mixture for the second time, washing the mixture with deionized water, and airing the mixture;

(2) Soaking the pretreated cotton thread in PEDOT (polyether-ether-ketone) PSS solution, adding polyalcohol and cross-linking agent, fully reacting and drying;

(3) And (3) placing the cotton thread obtained in the step (2) in a DMSO solvent for soaking for the third time, and drying to obtain the conductive cotton thread.

2. The dustproof mask with the respiratory monitoring function according to claim 1, wherein the monitoring processing module comprises a signal acquisition and amplification circuit, a filter, an ADC and a singlechip; the data transmission module comprises Bluetooth.

3. The dust mask with respiratory monitoring function of claim 1, wherein the power circuit is electrically connected to the power supply unit to provide the operating voltage required by the respiratory sensor and the monitoring processing module via the power circuit.

4. The dustproof mask with respiratory function according to claim 1, wherein the mask with respiratory function is further provided with an indicator lamp for displaying the working state of the mask.

5. The dustproof mask with the respiratory function according to claim 1, wherein the first soaking temperature is 70-80 ℃ and the soaking time is 2-2.5 h; the second soaking time is 5-6 h.

6. The dust mask of claim 1, wherein the bleaching agent is an aqueous solution of sodium hydroxide and sodium hypochlorite.

7. The dust mask of claim 1, wherein the polyol is sorbitol; the cross-linking agent is 3-triglycercide epoxypropyl trimethoxy silane.

8. The dust mask with respiratory monitoring function according to claim 1, wherein the third soaking time is 1 h-1.5 h.

9. The dustproof mask with respiratory function according to claim 1, wherein the mass ratio of PSS to PEDOT in the PEDOT-PSS solution is 2-3:1.

10. The dustproof mask with the respiratory function according to claim 7, wherein the mass fraction of sorbitol is 6% -8%; the mass fraction of the cross-linking agent is 3% -6%.

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