CN111616688A - Ion type strain sensor and pulse taking intelligent gloves - Google Patents
Ion type strain sensor and pulse taking intelligent gloves Download PDFInfo
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- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
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- A—HUMAN NECESSITIES
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- A61B5/0002—Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network
- A61B5/0004—Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network characterised by the type of physiological signal transmitted
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
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- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
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- C23C18/44—Coating with noble metals using reducing agents
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- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
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Abstract
The invention provides an ionic strain sensor, which comprises: a polyelectrolyte interlayer at an innermost layer of the ionic strain sensor; the interface transition layer is attached to the surface of the polyelectrolyte intermediate layer; and the surface electrode layer is attached to the surface of the interface transition layer. A pulse taking intelligent glove comprises a glove main body and ionic strain sensors, wherein the ionic strain sensors are arranged on the finger abdomen parts of the glove main body; the signal processing module is connected with the ionic type strain sensor and used for processing data obtained by the ionic type strain sensor; and the data presentation module is connected with the signal processing module and is used for presenting information to a user. The ionic strain sensor disclosed by the invention realizes the technical effects of passive detection, high stability, accurate sensitivity, light weight, thinness, small size and the like. The pulse taking intelligent glove and the pulse taking method of the invention utilize the ionic strain sensor to obtain pulse data, are designed into a glove structure, and have the characteristics of low power consumption, high resolution, high stability and the like.
Description
Technical Field
The invention relates to the technical field of electronics, in particular to an ionic strain sensor and a pulse taking intelligent glove.
Background
Along with the aging of the population in China, cardiovascular and cerebrovascular diseases such as hypertension, hyperlipidemia and coronary heart disease seriously threaten the health of human beings, and have the characteristics of high morbidity, high disability rate, high mortality and the like. In general, to accurately measure the relevant parameters of these diseases, the patients must go to the hospital with professional medical techniques, and the patients need to spend a lot of effort to go to the hospital. Of course, for effective prevention and treatment of such diseases, intelligent wearing technology will become an important trend. The Chinese patent with the application number of 201621085559.X discloses an automatic alarm intelligent watch, a heart rate detection module is arranged in a dial plate, the output end of the heart rate detection module is connected with a heart rate processing module, a GPS positioning module and a telephone card module are further arranged, and when the heart rate of a user is abnormal, alarm information and positioning information are sent outwards. But similar intelligent wearing equipment can only measure the heart rate generally, and its measurement is inaccurate inadequately, can appear the problem of wrong report or missing report.
The pulse signal is an important signal capable of reflecting the physiological condition of the body, and the pulse wave analysis based on the theory of traditional Chinese medicine provides a scientific means for non-invasively acquiring the health condition of the human body. However, the research on the method at home and abroad is still in the initial stage, the relationship between the pulse wave and the health condition is not clear, and the method is less in practical application in the auxiliary medical treatment. Therefore, the research on the feature extraction and identification method of the pulse wave corresponds to the traditional Chinese medicine pulse condition, and has important significance for accurately predicting the occurrence of the cardiovascular and cerebrovascular system diseases and giving scientific and reasonable guidance to the diagnosis and treatment process.
Disclosure of Invention
The invention aims to solve the problems existing in the prior art, and provides an ionic strain sensor, a preparation method, a pulse taking intelligent glove and an intelligent pulse taking method, so as to solve the problem that a patient needs to go to a hospital for examination or the measurement in the prior art is inaccurate, realize the technical effects of high-sensitivity sensing and accurate analysis of pulse measurement, accurate and timely early warning of cardiovascular diseases and the like, and play a positive and active health prevention function.
The technical scheme provided by the invention is as follows:
an ionic strain sensor comprising:
a polyelectrolyte interlayer at an innermost layer of the ionic strain sensor;
the interface transition layer is attached to the surface of the polyelectrolyte intermediate layer;
and the surface electrode layer is attached to the surface of the interface transition layer.
Preferably, the polyelectrolyte interlayer material is a perfluorosulfonic acid membrane having a thickness of between 170 and 200 microns.
Preferably, the surface electrode layer is between 300 and 800 nanometers thick.
A method for preparing an ionic strain sensor comprises the following steps:
cleaning the polyelectrolyte film material to form a polyelectrolyte layer;
roughening the surface of the polyelectrolyte layer, and then using [ Au (Phen) Cl2]Cl solution and Na2SO3Dipping the solution for more than one time to form an interface transition layer;
then using [ Au (Phen) Cl2]Cl solution and Na2SO3The solution is circularly immersed for more than four times to form a surface electrode layer;
and leading out the surface electrode layer by using a lead and packaging.
The utility model provides a handle pulse intelligence gloves, includes the gloves main part, still includes:
the ionic strain sensor is arranged on the finger belly part of the glove main body;
the signal processing module is connected with the ionic type strain sensor and used for processing data obtained by the ionic type strain sensor;
and the data presentation module is connected with the signal processing module and is used for presenting information to a user.
Preferably, the ionic strain sensors comprise at least three sensors which are respectively arranged on the finger pulp parts of the index finger, the middle finger and the ring finger of the glove main body.
Preferably, the signal processing module is disposed at a back of the hand of the glove body.
Preferably, the data presentation module comprises a communication unit, and the communication unit is used for transmitting the pulse taking information to the intelligent terminal.
An intelligent pulse taking method is applied to pulse taking intelligent gloves, wherein the pulse taking intelligent gloves comprise ionic strain sensors, and the intelligent pulse taking method comprises the following steps:
the ionic strain sensor obtains pulse data;
processing the pulse data and extracting pulse condition characteristic values;
and evaluating the health of the user according to the pulse condition characteristic value.
Preferably, the extracting the pulse condition feature value comprises the steps of:
judging whether the pulse rate is uniform or not according to the processed pulse data;
when the pulse rate is uniform, extracting pulse characteristics by using a hybrid genetic algorithm;
when the pulse rate is not uniform, extracting pulse characteristics by using a wavelet transform algorithm.
The ionic strain sensor provided by the invention is sensitive and accurate, and does not need an additional power supply, so that the technical effects of passive detection, high stability, accurate sensitivity, light weight, small size and the like are realized. The intelligent pulse feeling glove and the intelligent pulse feeling method provided by the invention utilize the ionic strain sensor to obtain pulse data, are designed into a glove structure, and a user can feel pulse according to a traditional mode only by wearing the glove, so that the intelligent pulse feeling glove has the characteristics of low power consumption, high resolution, high stability, high spatial responsiveness and the like, solves the technical problem that the traditional pulse feeling technology excessively depends on the medical experience of a doctor, can feel pulse at home, and avoids the trouble of going to a hospital.
Drawings
FIG. 1 is a schematic diagram of the strain principle of an ionic strain sensor in example 1 of the present invention;
FIG. 2 is a schematic flow chart of a method for manufacturing an ionic strain sensor according to example 2 of the present invention;
fig. 3A-3B are schematic structural views of an intelligent glove for taking pulse in embodiment 3 of the present invention;
FIG. 4 is a flowchart of an application of the intelligent gloves for pulse taking in accordance with embodiment 3 of the present invention;
FIG. 5 is a schematic flow chart of an intelligent pulse taking method according to embodiment 4 of the present invention;
fig. 6 is a comparison graph of pulse waves of a typical pulse taking intelligent glove product and a conventional pulse taking product in the embodiment of the invention.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Example 1
a polyelectrolyte interlayer at an innermost layer of the ionic strain sensor;
the interface transition layer is attached to the surface of the polyelectrolyte intermediate layer;
and the surface electrode layer is attached to the surface of the interface transition layer.
The polyelectrolyte interlayer material is preferably a perfluorosulfonic acid membrane having a thickness of between 170 and 200 microns.
The surface electrode layer has a thickness of 300 to 800 nm and the interface transition layer is within 100 nm.
As shown in FIG. 1, the ionic strain sensor without stress is shown in the left diagram, and after stress, the ionic strain sensor is strained as shown in the right diagram, ions in the polyelectrolyte in the middle of the ionic strain sensor migrate, and surface electrode layers on two sides of the ionic strain sensor generate a potential difference. When contacting the pulse site, the ionic strain sensor generates continuous potential difference signals according to pulse beat, and the potential difference signals are processed and analyzed by an external circuit and a server, so that pulse data and a diagnosis result of a user can be obtained.
The ionic strain sensor converts stress strain into potential difference, is sensitive and accurate, does not need an additional power supply, realizes the technical effects of passive detection, high stability, sensitivity and accuracy, light weight, thinness, small size and the like, can be applied to pulse taking, and can also be applied to the fields of complex configuration sign language activity recognition, motion fine action capture, remote control of intelligent robots and the like.
Example 2
Another embodiment of the present invention provides a method for preparing an ionic strain sensor, as shown in fig. 2, including the steps of:
and step S100, cleaning the polyelectrolyte film material to form a polyelectrolyte layer. The method specifically comprises the following steps: cutting a piece with proper size from a commercial polyelectrolyte film, and respectively using deionized water and 5% H2O2Solution and 0.5mol/L H2SO4The solution is circularly cleaned for 3 times, each time for 10min, and the purpose is to remove various organic impurities, organic impurities and inorganic metal cations possibly carried on the surface of the film.
Step S200, coarsening the surface of the polyelectrolyte layer, and using [ Au (Phen) Cl in sequence2]Cl solution and Na2SO3And soaking the solution once to form an interface transition layer. The method specifically comprises the following steps: the surface is roughened by adopting a plasma etching method or a mechanical grinding method, and the polyelectrolyte film is roughened by adopting 1200-mesh sand paper, so that the roughness of an interface is improved, and the sensing performance of the sensing material is improved; then passing through the [ Au (Phen) Cl layer once2]Cl solution and Na2SO3Dipping in the solution, and forming a uniform gold nanoparticle interface transition layer with the thickness within 100 nanometers on the surface of the pretreated polyelectrolyte layer.
Step S300, then using [ Au (Phen) Cl2]Cl solution and Na2SO3The solution is circularly immersed for four times to form a surface electrode layer. Wherein [ Au (Phen) Cl2]Cl solution and Na2SO3The solution may be of any suitable concentration. For example, [ Au (Phen) Cl2]The Cl solution can be prepared by mixing 10mg/mL NaAuCl4The aqueous solution is poured into boiling Phen (1, 10-phenanthroline) aqueous solution to obtain (NaAuCl)4The mass ratio of the two substances to the 1, 10-phenanthroline is about 23: 28); na (Na)2SO3The concentration of the solution may be about 5 wt%. The method specifically comprises the following steps: it was immersed in [ Au (Phen) Cl2]And soaking in a Cl solution for 24 hours, taking out, and washing with deionized water. Then putting the mixture into a beaker filled with deionized water and a water bath kettle at 60 ℃, and then gradually dripping 5% of Na by mass into the beaker2SO3The solution completes the reduction process, and the impregnation is circulated for four times. Then diluted H of 0.5mol/L at 75 DEG C2SO4Washing the solution with deionized water to remove Na possibly introduced in the dipping/reducing process+Ions. And then, the prepared sensor film is clamped and fixed between two glass slides, and the two glass slides are heated for 2 hours at the temperature of 140 ℃ so as to eliminate the internal stress introduced to the sensor film by each link of the preparation process. The gold nanoparticle electrode layer formed in the process has the thickness of 300-800 nanometers, and the conductivity is excellent.
And step S400, leading out the surface electrode layer by using a lead and packaging. The method specifically comprises the following steps: and connecting the lead to the upper surface and the lower surface of the sensor by adopting a conductive silver paste heating and curing mode, and packaging the PDMS thin layer on the surface of the thin-film device by using parylene packaging equipment.
The ionic strain sensor prepared by the method has the characteristics of being light and thin (the thickness is in micron order), small in size, high in sensitivity, high in stability and the like. The method can be applied to pulse taking, and can also be applied to the fields of recognition of complex configuration sign language activities, capture of motion subtle actions, remote control of intelligent robots and the like.
Example 3
Another embodiment of the present invention provides a pulse taking intelligent glove, as shown in fig. 3A-3B, including a glove main body 01, further including:
the ionic strain sensor 02 is arranged on the finger belly part of the glove main body 01;
the signal processing module 03 is connected with the ionic strain sensor 02 and used for processing data obtained from the ionic strain sensor 02;
and the data presentation module is connected with the signal processing module and is used for presenting information to a user.
This example selected the ionic strain sensor described in example 1.
The ionic strain sensors preferably comprise at least three ionic strain sensors which are respectively arranged on the finger pulp parts of the index finger, the middle finger and the ring finger of the glove main body. The pulse taking habit of the traditional Chinese medicine is that one hand is put on the wrist of a patient, wherein the index finger, the middle finger and the ring finger are respectively positioned at the pulse points of chi, guan and cun to take pulse. The ionic strain sensors are respectively arranged on the finger abdomen parts of the index finger, the middle finger and the ring finger, which accords with the pulse taking habit of the traditional Chinese medicine, not only saves the cost, but also can accurately detect the pulse condition. The ionic strain sensor can be adhered to the finger abdomen of the glove by flexible silica gel. Of course, the ionic strain sensors can be placed on other parts of the glove, such as joints, according to the needs, besides the three-finger abdomens of the index finger, the middle finger and the ring finger.
The signal processing module is preferably mounted on the back of the hand of the glove body, for example, via holes around the circuit board are sewn and fixed on the back of the hand of the glove body by using insulating yarns. The signal processing module is designed on the back of the hand, the area of the back of the hand is large, and the convenience of pulse taking is not influenced when the hand wearing the glove is on the back of the hand.
The signal processing module is preferably a flexible high-precision signal processing circuit. The signal processing module comprises an operational amplification circuit and an analog-to-digital conversion circuit. The operational amplifier in the operational amplifier circuit selects an AD8574 chip with ultralow offset and drift to amplify and operate the output signal of the sensor. The analog-to-digital conversion chip adopts a 24-bit high-precision ADS1256 acquisition chip and is connected with an embedded microcontroller STM32F103R to realize conversion of analog data and digital data. The ionic strain sensor and the signal processing module are preferably electrically connected through a DuPont wire. The DuPont wire is soft, and the comfort level of the glove can be improved.
The data presentation module preferably comprises a communication unit, the communication unit can select a Bluetooth communication circuit, and the Bluetooth communication chip selects an USR-BLE101 chip to be connected with an embedded microcontroller STM32F103R, so that data transmission between the signal processing module and the intelligent terminal is realized. The data presentation module may further comprise a display screen disposed on the glove body for displaying the pulse condition data.
Referring to fig. 4, when a user needs to take a pulse, the user only needs to wear the glove of this embodiment, put the hand wearing the glove on the wrist to be measured according to the traditional Chinese medicine habit, and put the index finger, the middle finger and the ring finger at three pulse positions of size, closing and size, the ionic strain sensor of the glove can obtain pulse data, and the pulse data is processed and analyzed by the data processing module or analyzed by an external server, so as to finally obtain a diagnosis result. The diagnosis result is displayed to the user by the intelligent terminal or a display screen on the pulse taking intelligent glove.
The intelligent pulse taking gloves of the embodiment utilize the ionic strain sensors to acquire pulse data, are designed into the glove structure, and a user can take pulses according to a traditional mode by wearing the gloves, so that the intelligent pulse taking gloves have the characteristics of low power consumption, high resolution, high stability, high spatial responsiveness and the like, the technical problem that the traditional pulse taking technology excessively depends on the medical experience of doctors is solved, the user can take pulses at home, and the trouble of going to a hospital is avoided. The pulse taking intelligent glove can also be applied to the fields of recognition of complex-configuration sign language activities, capture of motion fine actions, remote control of intelligent robots and the like.
Example 4
Another embodiment of the present invention provides an intelligent pulse taking method, which is applied to a pulse taking intelligent glove, where the pulse taking intelligent glove includes an ionic strain sensor, as shown in fig. 5, and the intelligent pulse taking method includes:
s10, obtaining pulse data by the ionic strain sensor;
s20, processing the pulse data and extracting pulse condition characteristic values;
and S30, evaluating the health of the user according to the pulse condition characteristic value.
Before the step S20, the method may further include the step S11 uploading the pulse data to a server, and the server performs the steps S20 and S30.
Preferably, step S20 specifically includes the steps of:
step S21, judging whether the pulse rate is uniform according to the processed pulse data;
when the pulse rate is uniform, step S22 is executed to extract pulse features by using a hybrid genetic algorithm;
when the pulse rate is not uniform, step S23 is performed to extract pulse features using a wavelet transform algorithm.
Before executing the pulse data processing, the server establishes a pulse analysis model in advance, and the model is established according to a large amount of historical pulse data and is used for pre-judging the pulse rhythm uniformity.
After the server evaluates the health of the user, the health evaluation result of the user is fed back to the user and can be presented to the user by using a display of the intelligent terminal or the glove.
Fig. 6 is a comparison chart of pulse waves obtained by pulse taking of a typical pulse taking intelligent glove product (curve 1) and the existing pulse taking product (curve 2) according to the embodiment of the invention.
According to the intelligent pulse taking method, the ionic strain sensor is used for accurately obtaining weak pulses, the method has the advantages of being low in power consumption, high in resolution, high in stability, high in spatial responsiveness and the like, the pulse characteristic value is extracted through the big data model, the health of a user is evaluated according to the pulse characteristic value, the technical effects of accurate and reliable data and convenience in use of the user are achieved, the technical problem that the traditional pulse taking technology is too dependent on the medical experience of a doctor is solved, the user can take the pulse at home, and the trouble of going to a hospital is avoided.
The invention also provides an intelligent pulse taking system which comprises the pulse taking intelligent gloves, the server and the intelligent terminal. The pulse taking intelligent glove comprises an ionic strain sensor and is used for obtaining pulse data and uploading the pulse data to a server. The server establishes a pulse analysis model in advance according to a large amount of historical pulse data. After the server receives the pulse data from the pulse taking intelligent gloves, the uniformity of the pulse is judged in advance by using a pulse analysis model. When the pulse rate is uniform, extracting pulse characteristics by using a hybrid genetic algorithm; when the pulse rate is not uniform, extracting pulse characteristics by using a wavelet transform algorithm. And the server evaluates the health of the user according to the pulse characteristics, sends the evaluation result to the intelligent terminal, and the intelligent terminal presents the evaluation result to the user. Or the server sends the evaluation result to the pulse taking intelligent gloves, and the display screen on the pulse taking intelligent gloves presents the evaluation result to the user.
The intelligent pulse taking system utilizes the pulse taking intelligent gloves with the ionic strain sensors to obtain pulse data, has the characteristics of low power consumption, high resolution, high stability, high spatial responsiveness and the like, extracts pulse characteristic values through a big data model, evaluates the health of a user according to the pulse characteristic values, is accurate and reliable in evaluation result, presents the evaluation result through the intelligent terminal, and is convenient for the user to check the result.
The foregoing describes only a few embodiments of the present invention, which are more specific and detailed, and therefore should not be construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. An ionic strain sensor, comprising:
a polyelectrolyte interlayer at an innermost layer of the ionic strain sensor;
the interface transition layer is attached to the surface of the polyelectrolyte intermediate layer;
and the surface electrode layer is attached to the surface of the interface transition layer.
2. The ionic strain sensor of claim 1 wherein the polyelectrolyte interlayer material is a perfluorosulfonic acid membrane having a thickness of between 170 and 200 microns.
3. The ionic strain sensor of claim 1, wherein the surface electrode layer is between 300 and 800 nanometers thick.
4. A method of making an ionic strain sensor according to claims 1 to 3, comprising the steps of:
cleaning the polyelectrolyte film material to form a polyelectrolyte layer;
roughening the surface of the polyelectrolyte layer, and then using [ Au (Phen) Cl2]Cl solution and Na2SO3Dipping the solution for more than one time to form an interface transition layer;
then using [ Au (Phen) Cl2]Cl solution and Na2SO3The solution is circularly immersed for more than four times to form a surface electrode layer;
and leading out the surface electrode layer by using a lead and packaging.
5. The utility model provides a handle pulse intelligence gloves, includes the gloves main part, its characterized in that includes:
the ionic strain sensor is arranged on the finger belly part of the glove main body;
the signal processing module is connected with the ionic type strain sensor and used for processing data obtained by the ionic type strain sensor;
and the data presentation module is connected with the signal processing module and is used for presenting information to a user.
6. The intelligent gloves for feeling pulse according to claim 5, wherein the ionic strain sensors are at least three and are respectively placed on the finger pulp of the index finger, the middle finger and the ring finger of the glove body.
7. The intelligent gloves for feeling pulse according to claim 5, wherein the signal processing module is disposed on the back of the hand of the glove body.
8. The intelligent gloves for taking pulse as claimed in claim 5, wherein the data presentation module comprises a communication unit, and the communication unit is used for transmitting pulse taking information to the intelligent terminal.
9. An intelligent pulse taking method is applied to pulse taking intelligent gloves and is characterized in that the pulse taking intelligent gloves comprise ionic strain sensors, and the intelligent pulse taking method comprises the following steps:
the ionic strain sensor obtains pulse data;
processing the pulse data and extracting pulse condition characteristic values;
and evaluating the health of the user according to the pulse condition characteristic value.
10. The intelligent pulse taking method according to claim 9, wherein the extracting pulse condition feature values comprises the steps of:
judging whether the pulse rate is uniform or not according to the processed pulse data;
when the pulse rate is uniform, extracting pulse characteristics by using a hybrid genetic algorithm;
when the pulse rate is not uniform, extracting pulse characteristics by using a wavelet transform algorithm.
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Application publication date: 20200904 |