CN113288160A - Multi-information acquisition equipment based on conductive fabric and manufacturing method - Google Patents

Multi-information acquisition equipment based on conductive fabric and manufacturing method Download PDF

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CN113288160A
CN113288160A CN202110612518.0A CN202110612518A CN113288160A CN 113288160 A CN113288160 A CN 113288160A CN 202110612518 A CN202110612518 A CN 202110612518A CN 113288160 A CN113288160 A CN 113288160A
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fabric
lig
flexible circuit
sensor
circuit board
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陆龙生
李泽泓
谢颖熙
林志燃
王文涛
蔡如茵
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South China University of Technology SCUT
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Measuring for diagnostic purposes; Identification of persons
    • A61B5/24Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
    • A61B5/316Modalities, i.e. specific diagnostic methods
    • A61B5/318Heart-related electrical modalities, e.g. electrocardiography [ECG]
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Measuring for diagnostic purposes; Identification of persons
    • A61B5/0002Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network
    • A61B5/0004Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network characterised by the type of physiological signal transmitted
    • A61B5/0006ECG or EEG signals
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Measuring for diagnostic purposes; Identification of persons
    • A61B5/01Measuring temperature of body parts ; Diagnostic temperature sensing, e.g. for malignant or inflamed tissue
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Measuring for diagnostic purposes; Identification of persons
    • A61B5/103Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
    • A61B5/11Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Measuring for diagnostic purposes; Identification of persons
    • A61B5/103Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
    • A61B5/11Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb
    • A61B5/113Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb occurring during breathing
    • A61B5/1135Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb occurring during breathing by monitoring thoracic expansion
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Measuring for diagnostic purposes; Identification of persons
    • A61B5/24Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
    • A61B5/25Bioelectric electrodes therefor
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Measuring for diagnostic purposes; Identification of persons
    • A61B5/24Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
    • A61B5/25Bioelectric electrodes therefor
    • A61B5/279Bioelectric electrodes therefor specially adapted for particular uses
    • A61B5/28Bioelectric electrodes therefor specially adapted for particular uses for electrocardiography [ECG]

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
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Abstract

The invention discloses a multi-information acquisition device based on a conductive fabric and a manufacturing method thereof, wherein the information acquisition device comprises: an ECG electrode portion comprising LIG fabric electrodes; the stretching induction sensor part comprises a flexible circuit with a stretchable structure, the flexible circuit is connected with the LIG fabric electrode, the LIG fabric is bonded on the flexible circuit, and the flexible circuit is packaged by adopting polyester to serve as a stretching sensor; the control part comprises a shell and a circuit board arranged in the shell, the circuit board is connected with the flexible circuit, and a sensor module is arranged on the circuit board; the LIG fabric is made by adopting a process of combining heating carbonization and laser. The invention uses the LIG fabric as an electrode, and solves the problem of poor contact body feeling; in addition, the multi-information acquisition equipment can acquire various information simultaneously, can construct more comprehensive user health state information, and can be widely applied to the technical field of information acquisition.

Description

Multi-information acquisition equipment based on conductive fabric and manufacturing method
Technical Field
The invention relates to the technical field of information acquisition, in particular to a conductive fabric-based multi-information acquisition device and a manufacturing method thereof.
Background
With the gradual improvement of the quality of life of people, people pay more and more attention to the physiological health state of the people, and therefore personal wearable equipment is gradually paid more and more attention. Electrocardiographic (ECG) monitoring in daily life is an effective measure for preventing sudden cardiac diseases such as sudden death. Other physiological or activity indicators, such as body temperature, respiration, movement status, etc., also play an important reference in assessing the health status of an individual.
The products with the electrocardio monitoring function on the market mainly comprise an intelligent watch and an electrocardio chest patch (belt). These products are small and flexible and are capable of collecting, recording and analyzing ECG signals in real time. The main principle is to collect weak subcutaneous ECG signals under two arms or the mastoid in front of the chest, and filter and amplify the weak signals through an integrated or multistage common operational amplifier. The processed signals are converted into digital signals after analog-to-digital conversion of the microcontroller, and the digital signals are uploaded to a mobile phone terminal program through Bluetooth after certain calculation and then are comprehensively analyzed by the mobile phone terminal program. However, in terms of hardware, the conventional ecg smart watch and ecg chest patch (belt) have the following problems:
(1) the electrocardio smart watch adopts limb leads, so that motion artifact interference is easily introduced. The user is required to be stationary while the activity of both hands is limited during measurement. The body feeling is not good due to the adoption of the metal electrode.
(2) The electrocardio-chest patch (belt) has single sensing information quantity, and the adopted scheme of ECG gel and non-woven fabric adhesion has lower air permeability, thus easily causing erythema.
Disclosure of Invention
To solve at least some of the technical problems of the prior art, the present invention provides a conductive fabric-based multi-information acquisition device and a manufacturing method thereof.
The technical scheme adopted by the invention is as follows:
a conductive fabric-based multi-information acquisition device comprising:
an ECG electrode portion comprising LIG fabric electrodes;
the stretching induction sensor part is used for detecting chest expansion during respiration and comprises a flexible circuit with a stretchable structure, wherein the flexible circuit is connected with the LIG fabric electrode, the LIG fabric is bonded on the flexible circuit, and the flexible circuit is packaged by adopting polyester to be used as a stretching sensor;
the control part comprises a shell and a circuit board arranged in the shell, the circuit board is connected with the flexible circuit, and a sensor module is arranged on the circuit board;
the multi-information acquisition equipment is used for acquiring ECG signals, body surface temperature and humidity signals, three-axis acceleration signals and chest expansion signals during respiration;
the LIG fabric is made by adopting a process of combining heating carbonization and laser.
Further, the sensor module comprises a temperature and humidity sensor and a three-axis accelerometer, and an ECG signal processing circuit, a microcontroller and a wireless communication module are further arranged on the circuit board.
Further, the model of microcontroller is STM8L151G6U6, wireless communication module adopts the bluetooth module of model HJ-131, the model of temperature and humidity sensor is HSU-CHM-01A, the model of triaxial accelerometer is QMA7981, the operational amplifier model of ECG signal processing circuit is AD 8232.
Further, the ECG electrode part also comprises a medical breathable PU adhesive film and a porous breathable polyester substrate, the LIG fabric electrode is adhered to the medical breathable PU adhesive film, and the medical breathable PU adhesive film is adhered to the porous breathable polyester substrate;
the flexible circuit adopts a stretchable and circuitous structure.
Further, the multi-information acquisition equipment acquires various sensor data at regular time;
the sampling frequency of the ECG signal is 40Hz, the sampling frequency of the body surface temperature and humidity signal is 1/6Hz, and the sampling frequency of the triaxial acceleration signal and the chest cavity expansion signal during respiration is 4 Hz.
Further, be equipped with the contact copper post that charges that is used for charging on the shell.
The other technical scheme adopted by the invention is as follows:
the manufacturing method of the conductive fabric-based multi-information acquisition equipment comprises the following steps:
manufacturing an ECG electrode part;
manufacturing a stretching induction sensor part;
the ECG electrode portion, the stretch sensing sensor portion and the control portion are packaged and assembled.
Further, the producing an ECG electrode portion includes:
preparing an LIG fabric: selecting pure white silk fabrics with preset specifications, carbonizing the pure white silk fabrics in an electric furnace under preset conditions, and processing the carbonized fabrics under laser with proper parameters to obtain LIG fabrics for ECG electrodes;
preparing a porous breathable polyester substrate: obtaining small-particle-size sucrose particles, mixing the small-particle-size sucrose particles with polyester to prepare colloid and solidifying the colloid, and mechanically kneading the solidified colloid in water until the sucrose is completely dissolved out to obtain a porous breathable polyester substrate;
assembling the ECG electrode: the LIG fabric for the ECG electrode is bonded to the breathable PU adhesive film, and then the breathable PU adhesive film is bonded to the porous breathable polyester substrate.
Further, the fabricating a stretch induction sensor portion includes:
preparing an LIG fabric: selecting pure white silk fabrics with preset specifications, carbonizing the pure white silk fabrics in an electric furnace under preset conditions, and processing the carbonized fabrics under laser with proper parameters to obtain LIG fabrics for a tension sensor;
assembling the conductive fabric stretch sensor: the LIG fabric for the tension sensor is bonded at two ends to two side electrodes of the flexible circuit by using a conductive adhesive, and the LIG fabric and the flexible circuit are packaged by using polyester to obtain the tension sensor.
Further, the packaging and assembling of the ECG electrode part, the stretch sensing sensor part, and the control part includes:
packaging the flexible circuit board with the stretchable structure: adhering the ECG electrode to the flexible circuit, and adhering the extension part of the LIG fabric in the ECG electrode to the corresponding electrode of the flexible circuit by using a conductive object;
assembling and packaging equipment: and welding the assembled bonding pad of the flexible circuit to a corresponding bonding pad of a hard circuit board of the control part, packaging the flexible circuit and the connected circuit board by using polyester, pressing a shell cover on the circuit board, and filling a contact copper column in a corresponding position of the shell to form a contact point for charging.
The invention has the beneficial effects that: the invention uses the LIG fabric as an electrode, and solves the problem of poor contact body feeling; in addition, the multi-information acquisition equipment can acquire various information simultaneously and can construct more comprehensive user health state information.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description is made on the drawings of the embodiments of the present invention or the related technical solutions in the prior art, and it should be understood that the drawings in the following description are only for convenience and clarity of describing some embodiments in the technical solutions of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a perspective view of a conductive fabric-based multiple information acquisition device in an embodiment of the present invention;
FIG. 2 is an exploded view of a conductive fabric based multiple information gathering device in an embodiment of the present invention;
FIG. 3 is a bottom view of a conductive fabric based multiple information gathering device in an embodiment of the present invention;
FIG. 4 is a schematic diagram of the AD8232 module design in an embodiment of the invention;
FIG. 5 is a PCB diagram of a circuit board incorporating a tri-axial accelerometer, a microcontroller and a Bluetooth module in an embodiment of the invention;
FIG. 6 is a PCB diagram of a circuit board incorporating an ECG signal processing circuit and a temperature and humidity sensor in an embodiment of the invention;
FIG. 7 is a diagram of a stretchable structural flexible circuit PCB in an embodiment of the present invention;
FIG. 8 is a block diagram of the main program of the microcontroller in an embodiment of the present invention;
FIG. 9 is a block diagram of a signal sampling routine in an embodiment of the present invention;
FIG. 10 is a block diagram of an instruction control routine in an embodiment of the present invention;
FIG. 11 is a schematic diagram of an ECG electrode in an embodiment of the invention;
FIG. 12 is a top view of the flexible circuit, the stretch sensor, the ECG electrodes, and the circuit board incorporating the ECG signal processing circuitry and the temperature and humidity sensor with portions of the soft encapsulant removed in accordance with an embodiment of the present invention;
fig. 13 is a bottom view of fig. 12.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention. The step numbers in the following embodiments are provided only for convenience of illustration, the order between the steps is not limited at all, and the execution order of each step in the embodiments can be adapted according to the understanding of those skilled in the art.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
As shown in fig. 1-3, the present embodiment provides a multi-information acquisition device based on conductive fabric, which includes an LIG fabric air-permeable electrode 1 adhered on a medical air-permeable PU adhesive film 2 and a porous air-permeable polyester substrate 3, an LIG fabric-based stretch sensor 5 assembled on a designed flexible circuit 4 with a stretchable structure and encapsulated with polyester, a circuit board 6 integrating an ECG signal processing circuit and a temperature and humidity integrated sensor, a 50mAh capacity polymer soft-packed lithium battery 7, a circuit board 8 integrating a triaxial accelerometer, a microcontroller and a bluetooth module, a core housing 9, and a charging contact copper column 10 embedded on the housing. The microcontroller acquires, converts and processes data of each sensor and acquires user ECG, body surface temperature and humidity, triaxial acceleration and respiration state information through wireless transmission of the Bluetooth module.
Aiming at the design of the conductive fabric-based multi-information acquisition equipment, the design comprises the following aspects:
in one aspect, the whole machine architecture: the device adopts an information transmission framework of a sensor, a microcontroller and a Bluetooth module. The sensor collects relevant signals of the human health state, and the signals are transmitted to the microcontroller through the processing module or the wired transmission after conversion. The microcontroller further processes the data and then transmits the data to the Bluetooth module in a wired mode, and the Bluetooth module transmits the data in a wireless mode. The device collects 5 user signals including ECG, body surface temperature, body surface humidity, triaxial acceleration and respiratory chest expansion.
In the second aspect, the component selection and circuit design: the circuit includes a power supply portion, a microcontroller portion, a bluetooth module portion, a sensor portion, and a circuit board connection path. The power supply part selects the crimping connectors as a main switch, and connects the two crimping connectors by using the conductive adhesive tape to electrify the equipment; the SSP6202P252 low-voltage difference linear voltage stabilizing chip is selected to supply 2.5V power to the whole equipment, and an LED lamp is used as a power-on indication. The microcontroller part selects STM8L151G6U6 as a microcontroller, and the power supply input of the microcontroller is filtered by using capacitance and inductance; leading out a USART communication line to communicate with the Bluetooth module; an IIC communication line is led out to be communicated with the three-axis accelerometer and the temperature and humidity sensing chip; leading out 3 ADC ports to respectively receive the processed ECG signal and the tension sensor bridge arm voltage signal; leading out a program downloading port of the microcontroller for downloading a program; an interrupt detection pin PB3 is led out, and the high and low potentials of the pin are detected when the Bluetooth module is connected; a common pin PB7 is led out to control the enabling and the shutting-off of the sensor; the lead PB5 controls the LED to display the working state. The Bluetooth module part selects an HJ-131 Bluetooth module, supplies power with high voltage, configures a power filter capacitor inductor and adopts an external patch antenna. The temperature and humidity sensor adopts an HSU-CHM-01A integrated chip and IIC communication; the three-axis accelerometer adopts QMA7981 and IIC communication; an AD8232 module is adopted in ECG signal processing, and analog quantity is output; the stretching sensor is used for detecting the expansion and contraction of the chest cavity when a user breathes so as to reflect the breathing state, the sensor constructs a bridge circuit, and the power supply of the bridge circuit is controlled by an RS2117YUTQK10 analog switch. The circuit board is connected with the circuit path part by adopting bonding pads with the interval of 1.27mm, the circuit board 6 integrating the ECG signal processing circuit and the temperature and humidity integrated sensor is connected with the circuit board 8 integrating the triaxial accelerometer, the microcontroller and the Bluetooth module by adopting pin headers, and the circuit board 6 integrating the ECG signal processing circuit and the temperature and humidity integrated sensor is connected with the flexible circuit 4 of the stretchable structure by adopting a patch bonding pad. Referring to fig. 4, the AD8232 module is constructed according to the chest two-electrode detection circuit.
Thirdly, designing the PCB: referring to fig. 5, circuit board 8 contains the device power supply portion, microcontroller portion, bluetooth module portion, and the three-axis accelerometer related electronics and circuitry, as well as the connection pin header pads that leave circuit board 8 and circuit board 6. Referring to fig. 6, the front surface of the circuit board 6 is provided with a mounting position of the AD8232 module and an analog switch, and the bottom surface is provided with a temperature and humidity sensor chip. The AD8232 module is realized in a flexible circuit board mode, and devices are all arranged on the same surface and are welded with the circuit board 7 to form a whole. Referring to fig. 7, the stretchable structure flexible circuits 4 are paired two by two, and respectively include a half bridge arm of the stretching sensor bridge circuit and an installation position of the ECG electrode, and meanwhile, a serpentine structure is designed in the middle of a bonding pad of the stretching sensor, so that the flexible circuit boards can be properly stretched and deformed.
And fourthly, controlling the flow: referring to fig. 8, after the device is powered on, each chip of the system defaults to an idle state, and the microcontroller enters a low power consumption state after initialization. The microcontroller detects the high and low level of the state pin of the Bluetooth module to judge whether the connection is carried out, and after the connection is successful, the microcontroller starts ADC, IIC, USART, TIM and IO function initialization. If the Bluetooth is disconnected, the function is closed, and the low power consumption state is recovered. Referring to FIG. 9, when TIM is enabled, corresponding sensor data is acquired periodically, with ECG sampling 40Hz, three-axis acceleration and respiration sampling 4Hz, and temperature and humidity sampling 1/6 Hz. After the corresponding conversion and storage are carried out, the package data are transmitted through the Bluetooth module after the temperature and humidity sampling is finished. Referring to fig. 10, the microcontroller receives two commands via bluetooth, and controls the enabling and disabling of the TIM and thus the sensor acquisition, respectively.
For the above multiple information acquisition devices based on conductive fabric, the present embodiment further provides a manufacturing method, including the following steps:
first, preparing an LIG fabric: selecting pure white silk fabrics with specifications of 30 mm and 15 mm, and cutting into 15 × 15cm2And (3) carbonizing in a common electric furnace to obtain the carbon material with the graphite-like structure, and preparing for generating LIG (laser induced growth) as a molecular structure. CarbonizingThe temperature program is: at 10 ℃ for min-1The temperature rise speed of (1) is increased from 25 ℃ to 150 ℃ and is kept for 60min, and then the temperature is kept for 5 min-1The temperature rise speed of the furnace is increased from 150 ℃ to 350 ℃, the temperature is kept for 180min, and finally the temperature in the furnace is naturally reduced to 25 ℃. The carbonized fabric is cut into 30X 8mm in advance according to the size of the final shape2The strip of (2) was held by a glass plate having a thickness of 1 mm. 30 mm carbonized silk under 1064nm laser at 1.2W power and 25mms-1The carbonized silk is processed on the front and back sides under the scanning speed, the scanning path interval of 0.1mm, the through-focus plane of 9mm and the pulse frequency of 20kHz to obtain the LIG fabric for the ECG electrode, the sheet resistance of the material is the lowest value at the moment, and the contact impedance is reduced. 15 mm carbonized silk is treated with 1.2W power and 50mms under 1064nm laser-1The carbonized silk is processed on one side at the scanning speed, the scanning path interval of 0.1mm, the through-focus plane of 9mm and the pulse frequency of 20kHz to obtain the LIG fabric for the stretching sensor, and the square resistance of the material is larger at the moment, so that the requirement of low power consumption is met.
Secondly, preparing a porous breathable polyester substrate 3: taking sucrose granules with the particle size of about 0.5mm, and mixing the sucrose granules according to the mass ratio (sucrose: polyester) 2: 1 blending colloid, stirring to make sucrose particles uniformly dispersed into colloid, and spreading on 20 × 20mm2The film is provided with a R8 round corner, is cured for 60min at 50 ℃ in a die with the depth of 1mm, and prevents the bubbles from being released in time to cause bulging when being heated too fast. Taking out the solidified colloid, and mechanically kneading in water until the sucrose is completely dissolved out. And finally heating and drying at 80 ℃ to obtain the porous breathable polyester substrate 3.
Third, assembling ECG electrodes: referring to fig. 11, the LIG fabric for ECG electrode in the first step is bonded with the air-permeable PU film 2 with the back adhesive, and then the above combination is cut into a mesh shape, the LIG fabric forming LIG fabric air-permeable electrode 1. The mesh is cut into holes, so that the middle area of the LIG electrode can be directly connected with the lower polyester substrate 3, and a better ventilation effect is achieved. And (3) blending polyester, adhering one surface of the cut PU film of the electrode belt to the porous breathable polyester substrate 3 prepared in the second part by using polyester, and finally curing the adhered body at 80 ℃ for 30 min.
Fourth, stretch-structure-stretchable flexible circuit 4, LIG-fabric-based stretch, is assembledSensor 5 and ECG electrodes of the third step: referring to FIG. 12, the LIG fabric for the stretch sensor is cut into 15X 2mm2And (3) bonding two ends of the cut LIG fabric for the tensile sensor to electrodes on two sides of the flexible circuit 4 with the serpentine structure of the tensile structure manufactured in a circuit board factory by using conductive silver paste, and curing the conductive silver paste at 130 ℃ for 10min to ensure firm bonding and stable electric connection. The assembly is placed in a mold to ensure that the flexible circuit 4 is flat, encapsulated with polyester and then cured at 80 ℃ for 30 min. The packaged circuit board is taken out, and the stretching sensor 5 based on the LIG fabric is obtained. The tensile sensors of the LIG fabric produce significant resistance changes both when the fibers break and pull apart when pulled and when released, return to contact under the action of the elastic polyester. Referring to fig. 13, the packaged circuit board is turned over, the ECG electrode of the third step is bonded to the protruding polyester flanges at the two ends of the flexible circuit 4 after packaging by using polyester, meanwhile, the extending part of the LIG fabric breathable electrode 1 in the ECG electrode of the third step is bonded to the electrode corresponding to the flexible circuit 4 with a stretchable structure by using conductive silver paste, and then the polyester and the conductive silver paste are cured at 80 ℃ for 30 min. In order to ensure the curing of the conductive silver paste and the low resistance of the electrical connection, the temperature can be raised to 100 ℃ on the basis of the heating, and the curing is continued for 10 min.
Fifthly, assembling packaging equipment: referring to fig. 13, the stretchable structure flexible circuit 4 assembled in the fourth step, the stretching sensor 5 based on the LIG fabric and the ECG electrode of the third step are soldered to the corresponding pads of the circuit board 6 integrating the ECG signal processing circuit and the temperature and humidity integrated sensor, then a prepreg sheet with a suitable shape is cut, the prepreg sheet is bonded to one surface of the bare circuit board in the soldered assembly with polyester to form an integrated circuit, and the existing gap is filled with polyester to play a role in protection. The lead of a polymer soft package lithium battery 7 with the capacity of 50mAh is welded to a circuit board 8 integrating a three-axis accelerometer, a microcontroller and a Bluetooth module, then the lithium battery 7 is clamped between the circuit board 6 and the circuit board 8 to form a sandwich shape, and the circuit board 6 and the circuit board 8 are welded by using 1.27mm pins to form electric connection. Finally, the plastic core housing 9 produced by 3D printing is pressed over the core machine composed of the circuit board 6, the lithium battery 7 and the circuit board 8. And a contact copper column 10 with the diameter of 1mm and the length of 2mm is plugged into a circular hollow corresponding to the shell to form a contact point for charging. And finally, glue is dripped into the joint of the packaged equipment to prevent moisture from entering the circuit.
In conclusion, the wearable ECG device solves the problems that the electrode of the existing wearable ECG device is cold and hard and has poor air permeability, and the problem that the traditional strain gauge is difficult to measure the large deformation of chest expansion during breathing. LIG fabric electrodes are more soft and skin friendly, and form a wet contact after storing moisture or ECG gel. Meanwhile, the equipment can collect multiple information and can construct more comprehensive user health state information.
In the foregoing description of the specification, reference to the description of "one embodiment/example," "another embodiment/example," or "certain embodiments/examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (10)

1. A multi-information acquisition device based on conductive fabric, comprising:
an ECG electrode portion comprising LIG fabric electrodes;
the stretching induction sensor part is used for detecting chest expansion during respiration and comprises a flexible circuit with a stretchable structure, wherein the flexible circuit is connected with the LIG fabric electrode, the LIG fabric is bonded on the flexible circuit, and the flexible circuit is packaged by adopting polyester to be used as a stretching sensor;
the control part comprises a shell and a circuit board arranged in the shell, the circuit board is connected with the flexible circuit, and a sensor module is arranged on the circuit board;
the multi-information acquisition equipment is used for acquiring ECG signals, body surface temperature and humidity signals, three-axis acceleration signals and chest expansion signals during respiration;
the LIG fabric is made by adopting a process of combining heating carbonization and laser.
2. The multi-information acquisition device based on the conductive fabric as claimed in claim 1, wherein the sensor module comprises a temperature and humidity sensor and a three-axis accelerometer, and the circuit board is further provided with an ECG signal processing circuit, a microcontroller and a wireless communication module.
3. The conductive fabric-based multi-information acquisition device according to claim 2, wherein the microcontroller is of a model STM8L151G6U6, the wireless communication module is of a model HJ-131 Bluetooth module, the temperature and humidity sensor is of a model HSU-CHM-01A, the triaxial accelerometer is of a model QMA7981, and the ECG signal processing circuit is of an operational amplifier of a model AD 8232.
4. The multi-information acquisition device based on conductive fabric according to claim 1, wherein the ECG electrode part further comprises a medical breathable PU adhesive film and a porous breathable polyester substrate, the LIG fabric electrode is adhered to the medical breathable PU adhesive film, and the medical breathable PU adhesive film is adhered to the porous breathable polyester substrate;
the flexible circuit adopts a stretchable and circuitous structure.
5. The multi-information collection device based on the conductive fabric as claimed in claim 1, wherein the multi-information collection device collects various sensor data periodically;
the sampling frequency of the ECG signal is 40Hz, the sampling frequency of the body surface temperature and humidity signal is 1/6Hz, and the sampling frequency of the triaxial acceleration signal and the chest cavity expansion signal during respiration is 4 Hz.
6. The multi-information collection device based on the conductive fabric as claimed in claim 1, wherein a charging contact copper column for charging is provided on the housing.
7. The method for manufacturing the conductive fabric-based multi-information acquisition device according to any one of claims 1 to 6, comprising the steps of:
manufacturing an ECG electrode part;
manufacturing a stretching induction sensor part;
the ECG electrode portion, the stretch sensing sensor portion and the control portion are packaged and assembled.
8. The method for manufacturing a conductive fabric-based multi-information-acquisition device according to claim 7, wherein the manufacturing the ECG electrode part comprises:
preparing an LIG fabric: selecting pure white silk fabrics with preset specifications, carbonizing the pure white silk fabrics in an electric furnace under preset conditions, and processing the carbonized fabrics under laser with proper parameters to obtain LIG fabrics for ECG electrodes;
preparing a porous breathable polyester substrate: obtaining small-particle-size sucrose particles, mixing the small-particle-size sucrose particles with polyester to prepare colloid and solidifying the colloid, and mechanically kneading the solidified colloid in water until the sucrose is completely dissolved out to obtain a porous breathable polyester substrate;
assembling the ECG electrode: the LIG fabric for the ECG electrode is bonded to the breathable PU adhesive film, and then the breathable PU adhesive film is bonded to the porous breathable polyester substrate.
9. The method of claim 7, wherein the fabricating the stretch induction sensor portion comprises:
preparing an LIG fabric: selecting pure white silk fabrics with preset specifications, carbonizing the pure white silk fabrics in an electric furnace under preset conditions, and processing the carbonized fabrics under laser with proper parameters to obtain LIG fabrics for a tension sensor;
assembling the conductive fabric stretch sensor: the LIG fabric for the tension sensor is bonded at two ends to two side electrodes of the flexible circuit by using a conductive adhesive, and the LIG fabric and the flexible circuit are packaged by using polyester to obtain the tension sensor.
10. The method for manufacturing a conductive fabric-based multi-information-acquisition device according to claim 7,
the packaging and assembling of the ECG electrode part, the stretch sensing sensor part, and the control part includes:
packaging the flexible circuit board with the stretchable structure: adhering the ECG electrode to the flexible circuit, and adhering the extension part of the LIG fabric in the ECG electrode to the corresponding electrode of the flexible circuit by using a conductive object;
assembling and packaging equipment: and welding the assembled bonding pad of the flexible circuit to a corresponding bonding pad of a hard circuit board of the control part, packaging the flexible circuit and the connected circuit board by using polyester, pressing a shell cover on the circuit board, and filling a contact copper column in a corresponding position of the shell to form a contact point for charging.
CN202110612518.0A 2021-06-02 2021-06-02 Multi-information acquisition equipment based on conductive fabric and manufacturing method Pending CN113288160A (en)

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Application publication date: 20210824