A dust mask with a monitoring respiratory function

Abstract

The application discloses a dustproof mask with monitoring respiratory function, comprising a dustproof mask body, a breathing sensor, a power supply 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 breathing sensor, the power supply circuit and the data transmission module; the dustproof mask body is provided with first filter cotton and 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; (2) immersing the cotton thread in a PEDOT:PSS solution, adding polyhydric alcohol and a crosslinking agent, and drying after sufficient reaction; and (3) soaking the cotton thread obtained in the step (2) in a DMSO solvent for the third time, and drying to obtain the conductive cotton thread. The breathing sensor is adopted, the power supply unit, the power supply circuit, the monitoring processing module and the data transmission module are matched, the breathing data is presented on the mobile terminal, and a portable, real-time, reliable and low-cost monitoring means is provided.

Description

TECHNICAL FIELD

[0001] The application relates to a dustproof mask with a respiratory function monitoring function and belongs to the technical field of intelligent wearable devices. BACKGROUND

[0002] Respiration is one of the three important signals of human vital signs and has extremely important reference value in human physiological monitoring. Many diseases can cause changes in respiratory rate and depth, such as coronavirus infection, bronchitis and the like. On the other hand, pneumoconiosis is the most common and most serious occupational disease in China, and workers are immersed in a dust-filled environment for a long time, and the industrial dust inhaled by the workers will cause irreversible 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 dust-filled environment.

[0003] The conventional respiratory monitoring methods usually need the help of a pressure sensor to detect the expansion and contraction of the chest, a thermal sensor uses the temperature change between the inhalation and exhalation airflow to monitor respiration, and on-board ultrasonic waves are also used to detect the sound velocity change caused by airflow. However, the above-mentioned conventional respiratory monitors have the disadvantages of low comfort, poor portability, high price and the like, and cannot be applied in actual work scenes. SUMMARY

[0004] In order to solve the above-mentioned problems, the application provides a dustproof mask with a respiratory function monitoring function, a conductive cotton thread is prepared, and the conductive cotton thread is embroidered on a second filter cotton to form a respiratory sensor, and a power supply unit, a power circuit, a monitoring processing module and a data transmission module are matched to present the respiratory data on a mobile terminal, thereby providing a portable, real-time, reliable and low-cost monitoring means. The application can monitor the respiratory indicators of workers in real time and accurately, and can also detect the failure of the dustproof filter cotton and timely remind the workers to replace the dustproof filter cotton, thereby preventing and monitoring diseases through new technologies and protecting the health of the workers.

[0005] According to one aspect of the application, a dustproof mask with a respiratory function monitoring function is provided, which comprises 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 respiratory 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. The first filter cotton is arranged outside the second filter cotton.

[0006] The respiratory sensor is obtained by embroidering a conductive cotton thread on the second filter cotton. The preparation method of the conductive cotton thread comprises the following steps:

[0007] (1) Pretreatment: the cotton thread is placed in a water solution of detergent, and a first soaking is carried out, and then washed with deionized water and dried; then the cotton thread is placed in a water solution of bleaching agent, and a second soaking is carried out, and then washed with deionized water and dried;

[0008] (2) The pretreated cotton thread is immersed in a PEDOT:PSS solution, and polyol and crosslinking agent are added, and after sufficient reaction, the cotton thread is dried;

[0009] (3) The cotton thread obtained in step (2) is placed in a DMSO solvent for a third soaking, and dried to obtain the conductive cotton thread.

[0010] The application realizes convenient and real-time monitoring of breathing by a wearable mask by preparing a conductive cotton thread, embroidering the conductive cotton thread on a second filter cotton to form a breathing sensor, and combining a power supply unit, a power supply circuit, a monitoring processing module and a data transmission module to present breathing data on a mobile terminal.

[0011] Optionally, the monitoring processing module comprises a signal acquisition and amplification circuit, a filter, an ADC and a single-chip microcomputer; and the data transmission module comprises Bluetooth.

[0012] Optionally, the power supply circuit is electrically connected with the power supply unit to provide a working voltage required by the breathing sensor and the monitoring processing module through the power supply circuit.

[0013] Optionally, the mask with the function of monitoring breathing is further provided with an indicator light to display the working state of the mask.

[0014] The indicator light is electrically connected with the monitoring processing module, and the monitoring processing module performs required indication, such as alarm indication, through the indicator light.

[0015] Optionally, the first soaking is carried out at a temperature of 70-80℃ for 2-2.5 hours; and the second soaking is carried out for 5-6 hours.

[0016] Optionally, the bleaching agent is a water solution of sodium hydroxide and sodium hypochlorite.

[0017] Optionally, the polyol is sorbitol; and the crosslinking agent is 3-triglyceride epoxypropyltrimethoxysilane.

[0018] Optionally, the third soaking is carried out for 1-1.5 hours.

[0019] Optionally, in the PEDOT:PSS solution, the mass ratio of PSS to PEDOT is 2-3:1.

[0020] Specifically, the mass ratio of PSS to PEDOT in the PEDOT:PSS solution 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.

[0021] Optionally, the mass fraction of the sorbitol is 6% to 8%, and the mass fraction of the crosslinking agent is 3% to 6%.

[0022] The beneficial effects of the present application include but are not limited to:

[0023] 1. The dustproof mask with respiratory function monitoring provided by the present application, by preparing conductive cotton thread and embroidering the conductive cotton thread on the second filter cotton to form a respiratory sensor, and cooperating with a power supply unit, a power supply circuit, a monitoring processing module, and a data transmission module, the respiratory data is presented on a mobile terminal, thereby providing a portable, real-time, reliable, and low-cost monitoring means.

[0024] 2. The dustproof mask with respiratory function monitoring provided by the present application, two electrodes are obtained by interlacing embroidering two conductive cotton threads on the second filter cotton, that is, the two electrodes jointly constitute a respiratory sensor. By interlacing embroidering the two conductive cotton threads, on the one hand, the area of the electrode and the signal-to-noise ratio can be effectively increased, the signal quality is improved, and on the other hand, it is beneficial for the wearer to breathe the humid gas into the second filter cotton quickly, which is captured by the electrode, thereby improving the monitoring sensitivity.

[0025] 3. The dustproof mask with respiratory function monitoring provided by the present application, the conductive cotton thread is prepared by a specific method, the pretreatment is through first soaking and second soaking, impurities on the surface of the cotton thread are effectively reduced, reaction sites on the cotton thread are increased to improve the adhesion of the conductive dye on the surface of the cotton thread, and the conductive dye is uniformly and densely coated on the cotton thread; by impregnating in the PEDOT:PSS solution doped with polyol and crosslinking agent, the conductivity and mechanical properties of the conductive cotton thread are effectively improved; finally, the conductive cotton thread is soaked in DMSO solvent for the third time, the non-conductive PSS and residual polyol can be cleaned, and the conductivity of the conductive cotton thread is further improved.

[0026] 4. The dustproof mask with respiratory function monitoring provided by the present application, the difference in humidity caused by human exhalation and inhalation is utilized, that is, when exhaling, the gas is humid, which increases the water content on the conductive cotton thread, and vice versa, when inhaling, which reduces the water content on the conductive cotton thread; when the conductive cotton thread electrode is powered, the water adsorbed on the conductive cotton thread is electrolyzed into H + and OH -So as to cause the resistance to change in the process of inhale and exhale, the moisture increases, the movable ion produced by electrolytic water increases, and the resistance decreases. By applying a direct current signal to the conductive cotton thread electrode, the resistance can be converted into a voltage signal by the Wheatstone bridge method, and the respiratory data is presented on the mobile terminal by cooperating with the monitoring processing module and the data transmission module, thereby providing a portable, real-time, reliable and low-cost monitoring means.

[0027] 5. The dust mask with monitoring respiratory function provided in the present application, by adding a specific proportion of sorbitol in the process of preparing the conductive cotton thread, after adding, the conformation of PEDOT:PSS will change from the twisted thread group to the linear or expanded thread group structure, causing the units near thiophene on the PEDOT molecular chain to tend to adopt the same plane structure, the increase of quinone structure in the molecular structure, the enhancement of electron ionization ability, the improvement of carrier migration, thereby increasing the conductivity. BRIEF DESCRIPTION OF DRAWINGS

[0028] The drawings described herein are used to provide further understanding of the present application, and form a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application, and do not constitute improper limitations on the present application. In the drawings:

[0029] Figure 1 It is a side view of the dust mask with monitoring respiratory function involved in the present application;

[0030] Figure 2 It is a front view of the dust mask with monitoring respiratory function involved in the present application;

[0031] Figure 3 It is a side view of the dust mask with monitoring respiratory function involved in the present application after removing the first filter cotton;

[0032] Figure 4 It is a front view of the dust mask with monitoring respiratory function involved in the present application after removing the first filter cotton;

[0033] Figure 5 It is a structure block diagram of each module unit involved in the present application;

[0034] Figure 6 It is a voltage signal diagram of the dust mask with monitoring respiratory function involved in the present application in different respiratory states;

[0035] Figure 7 It is a conductive cotton thread embroidery electrode diagram involved in the present application;

[0036] Figure 8The working flow of the dust mask with monitoring respiratory function according to the embodiment 1 of the present application.

[0037] Reference signs:

[0038] 1. Dust mask body; 2. Hanging ear band; 3. Second filter cotton; 4. Conductive cotton thread; 5. First filter cotton. DETAILED DESCRIPTION

[0039] The present application will be described in detail below with reference to the embodiments, but the present application is not limited to these embodiments.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The agents or raw materials used in the present application can be purchased through conventional routes, and if no special description is given, the agents or raw materials used in the present application are used according to the conventional manner in the art or according to the product instructions. In addition, any method and material similar or equivalent to those described can be applied to the method of the present application. The preferred implementation methods and materials described in the present patent are only for demonstration.

[0041] Embodiment 1

[0042] Reference Figures 1-8 The embodiment 1 of the present application discloses a dust mask with monitoring respiratory function, comprising a dust mask body 1, a respiratory sensor, a power supply 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 respiratory sensor, the power supply circuit and the data transmission module; the monitoring processing module is wirelessly connected with the mobile terminal through the data transmission module; the dust mask body 1 is provided with a first filter cotton 5 and a second filter cotton 3, and the first filter cotton 5 is arranged outside the second filter cotton 3.

[0043] Specifically, the specific form of the dust mask body can be selected according to the actual situation. Generally, the dust mask body 1 is provided with a hanging ear band 2 at both ends to wear the dust mask body 1 on the head, and the cooperation form of the hanging ear band 2 and the dust mask body 1 can be selected by the person skilled in the art according to the actual situation, which is not limited in the present application.

[0044] Specifically, the conductive cotton thread 4 is embroidered on the second filter cotton 3, the first filter cotton 5 is degraded or fails in the working process, and the dust enters the dust mask body 1 through the first filter cotton 5, polluting the second filter cotton 3 and the respiratory sensor, and then the respiratory sensor receives the signal and is affected, and the monitoring processing module and the indicator light issue a warning.

[0045] Specifically, the first filter cotton 5 is arranged outside the second filter cotton 3 to filter industrial dust.

[0046] The monitoring processing module comprises a signal acquisition and amplification circuit, a filter, an ADC and a single-chip microcomputer; and the data transmission module comprises Bluetooth.

[0047] Specifically, the single-chip microcomputer collects and records the voltage signals, and the signal acquisition and amplifier amplifies the voltage signals collected by the single-chip microcomputer.

[0048] The power supply circuit is electrically connected with the power supply unit to provide the working voltage required by the breathing sensor and the monitoring processing module through the power supply circuit.

[0049] Specifically, the power supply unit comprises a lithium battery or a solar cell.

[0050] The dust mask with the monitoring breathing function is also provided with an indicator light to display the working state of the mask.

[0051] Specifically, the form of the indicator light can be selected by those skilled in the art according to actual conditions, and the present application does not make specific limitations.

[0052] Further, those skilled in the art can also use a buzzer or other alarm forms according to actual conditions.

[0053] Specifically, the breathing frequency is calculated by the positions of the wave peaks and wave troughs of the breathing curve waveform graph, and the breathing frequency is generally calculated for 30 seconds. The normal breathing frequency is usually 16-24 times per minute, and less than 10 times per minute usually indicates that the breathing frequency of the patient is slow, and more than 24 times per minute usually indicates that the patient has rapid breathing.

[0054] For the breathing curve graph, the exhalation process corresponds to the rising edge of the curve, i.e. the wave peak, and the inhalation process corresponds to the falling edge of the curve, i.e. the wave trough. According to the sampling frequency f s of the breathing sensor, the point interval N between the wave troughs, the breathing frequency f can be obtained, and the calculation formula is: f=60*f s / N.

[0055] Specifically, in actual application, the average breathing frequency obtained by averaging multiple calculations can be taken as a judgment parameter.

[0056] Further, in the monitoring processing module, the highest and lowest thresholds of the breathing frequency are set, and when the measured breathing 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, such as health suggestions or suggestions for replacing the filter cotton.

[0057] The working process of the dust mask with the monitoring breathing function is as follows:

[0058] The dustproof mask with the function of monitoring breathing function, through the breathing sensor, the monitoring processing module obtains the breathing signal and processes the collected breathing signal, and then transmits the breathing signal to the mobile terminal through the data transmission module. If the breathing curve can be obtained, the breathing curve is recorded and analyzed, and if the breathing curve reflects that the person is in a certain sub-health state, the mobile terminal app or indicator light will issue an alarm prompt; if the breathing curve cannot be obtained, it should be checked whether the dustproof mask with the function of monitoring breathing function is affected by the failure of the first filter cotton 5, thereby affecting the normal work of the breathing sensor on the second filter cotton 3, and the first filter cotton 5 is suggested to be replaced in time.

[0059] Preparation of conductive cotton thread 1# in Example 2

[0060] (1) Pretreatment: the cotton thread is placed in a water solution of detergent for the first time, the first time soaking temperature is 70 DEG C, the soaking time is 2h, and the deionized water is washed and dried; continue to be placed in a water solution of sodium hydroxide and sodium hypochlorite, and the second time soaking is carried out, the soaking time is 5h, and the deionized water is washed and dried;

[0061] (2) The pretreated cotton thread is immersed in a PEDOT:PSS solution, the mass ratio of PSS to PEDOT is 2:1, sorbitol and crosslinking agent 3-triglyceride epoxy propyl trimethoxysilane are added, the mass fraction of sorbitol is 6%, and the mass fraction of crosslinking agent is 3%, and the cotton thread is dried after sufficient reaction;

[0062] (3) The cotton thread obtained in step (2) is placed in DMSO solvent for the third time, the soaking time is 1h, and the conductive cotton thread 1# is obtained after drying.

[0063] Preparation of conductive cotton thread 2# in Example 3

[0064] (1) Pretreatment: the cotton thread is placed in a water solution of detergent for the first time, the first time soaking temperature is 80 DEG C, the soaking time is 2.5h, and the deionized water is washed and dried; continue to be placed in a water solution of sodium hydroxide and sodium hypochlorite, and the second time soaking is carried out, the soaking time is 6h, and the deionized water is washed and dried;

[0065] (2) The pretreated cotton thread is immersed in a PEDOT:PSS solution, the mass ratio of PSS to PEDOT is 3:1, sorbitol and crosslinking agent 3-triglyceride epoxy propyl trimethoxysilane are added, the mass fraction of sorbitol is 7%, and the mass fraction of crosslinking agent is 6%, and the cotton thread is dried after sufficient reaction;

[0066] (3) The cotton thread obtained in step (2) is placed in DMSO solvent for the third time, the soaking time is 1.5h, and the conductive cotton thread 2# is obtained after drying.

[0067] Preparation of conductive cotton thread 3# in Example 4

[0068] (1) Pretreatment: the cotton thread is placed in a water solution of detergent for the first soaking, the first soaking temperature is 75℃, the soaking time is 2.5h, washed with deionized water and dried; continue to be placed in a water solution of sodium hydroxide and sodium hypochlorite for the second soaking, the soaking time is 6h, washed with deionized water and dried;

[0069] (2) the pretreated cotton thread is immersed in a PEDOT:PSS solution, the mass ratio of PSS to PEDOT is 2.3:1, sorbitol and a crosslinking agent 3-triglyceride epoxy propyl trimethoxysilane are added, the mass fraction of sorbitol is 8%, the mass fraction of the crosslinking agent is 5%, after sufficient reaction, drying is performed;

[0070] (3) the cotton thread obtained in step (2) is placed in a DMSO solvent for the third soaking, the soaking time is 1.5h, and the conductive cotton thread 3# is obtained after drying.

[0071] Preparation of conductive cotton thread D1# in Comparative Example 1

[0072] Comparative Example 1 and Example 3 are different in that step (1) pretreatment is not performed, and the rest are the same.

[0073] Preparation of conductive cotton thread D2# in Comparative Example 2

[0074] Comparative Example 2 and Example 3 are different in that step (3) is not performed, and the rest are the same.

[0075] Preparation of conductive cotton thread D3# in Comparative Example 3

[0076] Comparative Example 2 and Example 3 are different in that the added alcohol is ethylene glycol, and the rest are the same.

[0077] Experimental Example 1

[0078] The conductivities of the conductive cotton threads obtained in Examples 2-4 and Comparative Examples 1-3 are measured, and the results are shown in the following table.

[0079] Table 1: Conductivity results

[0080] Conductive cotton thread Electrical 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

[0081] From the above data, it can be seen that the conductivities of the conductive cotton threads 1#-3# obtained in Examples 2-4 are better than those of the conductive cotton threads D1#-D3#, and the conductivity of the conductive cotton thread 3# is the best, reaching 1021S / cm.

[0082] The conductivity of the conductive cotton thread D1# is 863 S / cm, which is lower than that of the conductive cotton threads 1#-3#. The reason is that the conductive cotton thread D1# is not pretreated in the preparation process, so that impurities are attached to the surface of the cotton thread, the reaction sites on the cotton thread are less, the adhesion of the conductive dye on the surface of the cotton thread is reduced, the conductive dye is not uniformly coated on the cotton thread, and thus the conductivity is reduced.

[0083] The conductivity of the conductive cotton thread D2# is 852 S / cm, which is lower than that of the conductive cotton threads 1#-3#. The reason is that the conductive cotton thread D2# is not treated in step (3) in the preparation process, so that the non-conductive PSS and residual polyols exist on the surface of the conductive cotton thread, which affects the conductivity of the conductive cotton thread.

[0084] The conductivity of the conductive cotton thread D3# is 926 S / cm, which is lower than that of the conductive cotton threads 1#-3#. The reason is that the conductive cotton thread D3# does not add sorbitol but adds ethylene glycol. Sorbitol has stronger hydrophilicity and is more conducive to the interaction between PSS and alcohol, which weakens the interaction between PEDOT and PSS, promotes the crystallization of PEDOT, and is conducive to improving the conductivity.

[0085] The above is only an embodiment of the present application, and the protection scope of the present application is not limited by these specific embodiments, but is determined by the claims of the present application. The present application can have various modifications and changes for those skilled in the art. Any modification, equivalent replacement, improvement, etc. within the technical thought and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A dust mask having a respiratory function monitoring, characterized by, The dust mask body, the breathing sensor, the power supply circuit, the power supply unit, the monitoring processing module, the data transmission module and the mobile terminal are connected; the monitoring processing module is connected with the breathing sensor, the power supply circuit and the data transmission module; the monitoring processing module is wirelessly connected with the mobile terminal through the data transmission module; the dust mask body is provided with the first filter cotton and the second filter cotton, and the first filter cotton is arranged outside the second filter cotton; the dust mask with the monitoring breathing function is also provided with an indicator light to display the working state of the dust mask; the breathing sensor is composed of two electrodes obtained by cross-stitching two conductive cotton threads on the second filter cotton; The preparation method of the conductive cotton thread comprises the following steps: (1) pretreatment: the cotton thread is placed in a water solution of detergent for the first time, washed with deionized water and dried; then the cotton thread is placed in a water solution of bleaching agent for the second time, washed with deionized water and dried, and the bleaching agent is a water solution of sodium hydroxide and sodium hypochlorite; (2) the pretreated cotton thread is immersed in a PEDOT:PSS solution, polyol and crosslinking agent are added, and the cotton thread is dried after sufficient reaction, the polyol is sorbitol with a mass fraction of 6%-8%, the crosslinking agent is 3-triglyceride epoxy propyl trimethoxy silane with a mass fraction of 3%-6%, and the mass ratio of PSS to PEDOT in the PEDOT:PSS solution is 2-3:1; (3) the cotton thread obtained in step (2) is placed in a DMSO solvent for the third time, and the conductive cotton thread is obtained after drying; the first time of immersion is 70-80 DEG C, and the immersion time is 2-2.5 h; the second time of immersion is 5-6 h, and the third time of immersion is 1-1.5 h; The working method of the dust mask comprises the following steps: the breathing sensor and the monitoring processing module obtain the breathing signal and process the collected breathing signal, and then the data transmission module transmits the breathing signal to the mobile terminal; if the breathing curve can be obtained, the breathing curve is recorded and analyzed, and the mobile terminal app or the indicator light will issue an alarm prompt if the breathing curve reflects that the person is in a certain sub-health state; if the breathing curve cannot be obtained, it is suggested to check whether the dust mask with the monitoring breathing function is affected by the failure of the first filter cotton, so as to affect the normal work of the breathing sensor on the second filter cotton, and a prompt for replacing the first filter cotton in time is issued.

2. A dust mask with monitoring respiratory function according to claim 1, characterized in that, The monitoring processing module comprises a signal acquisition and amplification circuit, a filter, an ADC and a single-chip microcomputer; and the data transmission module comprises Bluetooth.

3. A dust mask with respiratory monitoring function according to claim 1, characterized in that, The power supply circuit is connected with the power supply unit to provide the working voltage required by the breathing sensor and the monitoring processing module through the power supply circuit.

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