CN106510689A - Wearable multi-physiological-parameter acquisition device - Google Patents

Abstract

The invention discloses a wearable multi-physiological parameter acquisition device, which comprises: using a relatively fixed electrocardiographic electrode to collect electrocardiographic signals, and inputting digital signals into a microprocessor through an electrocardiographic signal processing module; elastic strip-shaped conductive fabric Embedded in the inner side of the abdomen of the wearable clothing in a ring shape, the change of the circumference of the abdomen caused by breathing will also cause the deformation of the fabric breathing sensor, resulting in a change in its resistance value. Real-time monitoring; the digital infrared temperature sensor can be used to collect the body temperature of the human body in real time, and the monitoring of abnormal actions can be realized through the change degree of the output signal of the three-axis acceleration sensor. The invention has the advantages of simple structure, convenient replacement and maintenance, good comfort and reusability, can realize continuous monitoring and recording of multiple physiological parameters of users, and greatly improves the stability of electrocardiographic signal collection through the electrode fixing layer.

Description

A wearable multi-physiological parameter acquisition device

technical field

The invention relates to a wearable multi-physiological parameter acquisition device, which belongs to the field of intelligent wearable equipment.

Background technique

In recent years, with the improvement of people's quality of life and medical and health standards, the global population is gradually aging. The decline in physical function and immunity has led to the elderly becoming a high-risk group of chronic diseases, especially cardiovascular disease and coronary heart disease. Chronic diseases are the main cause of death and disability in the elderly. For the prevention and monitoring of chronic diseases, it is necessary Social medical care has gradually shifted from disease treatment-centered to prevention-oriented, early diagnosis, and early treatment. The physiological parameter monitoring system also needs to change from large-scale medical care equipment in hospitals to small portable health monitoring equipment for household use that can satisfy the general population. With the rapid development of embedded technology and Internet of Things technology, especially the popularization of mobile terminals such as smart phones, the development and popularization of 3G and 4G networks have provided key technical support and equipment foundation for home health monitoring and telemedicine .

As a comprehensive manifestation of the electrical activity of the heart on the body surface, the ECG signal reflects the electrical activity process of the heart's excitation, and has important reference value for the basic function and pathological research of the heart. At the same time, body temperature signals and respiratory signals are also important basis for long-term diagnosis of potential chronic diseases. In the current medical system in our country, patients only go to the hospital for routine physical examination and diagnosis when they feel obvious symptoms such as palpitation and chest tightness. However, this traditional method can only provide information on the physical condition of the patient at a certain moment, but cannot monitor the change trend of its physiological parameters for a long time, and then obtain useful information to guide the prevention and treatment of diseases.

With the advancement of materials and textile technology, conductive fabrics have become a hot research field, and various wearable physiological parameter monitoring devices based on smart fabrics and integrated sensors have emerged, mainly including wristbands, chest straps, and smart clothing. Especially for smart clothing, because clothing is an essential item in people's daily life, unlike wristbands and chest straps that will cause inconvenience and discomfort when worn for a long time, and the clothing is worn next to the body, it is designed as a sensor in the signal Collection has a natural advantage.

The wearable multi-physiological parameter acquisition device suitable for families can realize real-time monitoring and recording of various important physiological parameters of the human body. Including heart rate and ECG signals, breathing signals, body surface temperature, human body posture signals, etc., users can check their physical conditions at any time, and realize long-term tracking and analysis of health conditions through stored physiological data, and realize monitoring and control in daily life. Monitoring of chronic diseases, while preventing death caused by missing the best time for treatment due to sudden diseases.

Therefore, it is of great significance for family health monitoring, especially for the care of the elderly, to design a wearable multi-physiological parameter acquisition device that can continuously monitor and record multiple physiological parameters of users in daily life, combined with conductive fabrics.

Contents of the invention

Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a wearable multi-physiological parameter acquisition device, which has the characteristics of simple structure, convenient replacement and maintenance, and good comfort, and can realize multiple physiological parameters of the user. Continuous monitoring and recording, and improve the stability of ECG signal acquisition through the electrode fixed layer.

Technical scheme: in order to achieve the above object, the technical scheme adopted in the present invention is:

A wearable multi-physiological parameter acquisition device, including wearable clothing, two ECG electrodes, a fabric respiration sensor, a signal processing node, and fabric wires;

Wherein, the ECG electrodes are arranged on the inner side of the left sternoclavicular and right sternoclavian respectively, and the fabric breathing sensor is made by sewing a belt-shaped elastic conductive fabric on the inner side of the wearable around the abdomen; the signal processing node It is set under the chest of the wearable clothing, and includes a microprocessor and its peripheral body temperature measurement module, a three-axis acceleration sensor, an ECG signal processing module, and a respiratory signal processing module; the two signal input terminals of the ECG signal processing module pass through The fabric wires are respectively connected to the two ECG electrodes, and the two signal input terminals of the respiratory signal processing module are connected to the two ends of the fabric breathing sensor through the fabric wires; the body temperature measurement module, the three-axis acceleration sensor, the ECG signal processing module and the respiratory signal The signal output terminals of the processing module are all connected to the microprocessor, and the microprocessor performs data transmission with the mobile terminal through the built-in bluetooth communication module.

Use the electrocardiographic electrodes arranged under the left sternoclavicular and right sternoclavian to collect electrocardiographic signals, and perform amplification, filtering and analog-to-digital conversion through the integrated digital front-end chip of the electrocardiographic signal processing module, and input the digital signals into the microprocessor, and Upload to the mobile terminal through the built-in Bluetooth communication module; use the digital infrared temperature sensor to collect the body temperature in real time, and upload it to the mobile terminal through the built-in Bluetooth communication module of the microprocessor to realize real-time monitoring of body temperature; The belt-shaped conductive fabric is embedded in the inner side of the abdomen of the wearable clothing in a ring shape. The change of the circumference of the abdomen caused by breathing will also cause the deformation of the strip-shaped elastic conductive fabric, resulting in a change in its resistance value. monitoring, and then realize real-time monitoring of human respiration; the signal output by the triaxial acceleration sensor is relatively stable when the human body is in normal activities, but in abnormal actions (such as falling), the output signal of the sensor will change drastically, and it is easy to pass the degree of change. Realize the monitoring of abnormal actions.

Ordinary fabric ECG electrodes can detect the static ECG of the measured object, but when the measured object is in motion, only tight clothing fixation effect is poor, and the relative displacement of the electrode on the human skin surface will be caused when the motion occurs, introducing relatively large Large baseline drift and motion noise, in such a signal, it is difficult to extract useful signals.

Therefore, preferably, the electrocardiographic electrode includes a base layer, a signal transmission layer, an electrode fixing layer, a support layer and a sensing layer arranged from the outside of the clothing towards the skin; wherein the base layer is a clothing layer, and The signal transmission layer is fabric wire; the supporting layer is memory foam, and the sensing layer is made of conductive fabric; the side of the electrode fixing layer close to the skin is provided with a groove, and the conductive fabric wrapped with memory foam is set in the groove; the center of the groove is A through hole is arranged at the place, and the fabric wire passes through the through hole to connect with the conductive fabric, and the side of the electrode fixing layer contacting the skin is sticky. The electrode fixing layer ensures that the sensing layer can remain relatively fixed when in contact with the skin, reducing the sliding of the electrodes, thereby obtaining better-quality ECG signals.

Further, the inner side of the wearable garment is provided with a cotton isolation inner liner, the strip-shaped elastic conductive fabric and the fabric wires are arranged between the wearable garment and the cotton isolation inner liner, and the electrode fixing layer is fixed in the inner liner , so as to realize the isolation of the belt-shaped elastic conductive fabric and the fabric wire from the abdominal skin, prevent the interference caused by the direct contact between the conductive fabric and the skin, and effectively improve the comfort. Since the entire fabric breathing sensor is made of conductive fabric, it is soft and elastic, comfortable to wear and suitable for long-term use.

Preferably, the electrode fixing layer, the memory foam and the groove are all cylindrical, the electrode fixing layer is made of GeckTeck material, and the thickness of the memory foam is not lower than the depth of the groove. A properly raised sensing layer has better contact with the skin surface, and through coupling with the human skin, a conductive path is formed to transmit the body surface charge to the ECG node. GeckTeck is a biocompatible, silicone-based material that uses the same physical properties as geckos to adhere to virtually any surface using intermolecular van der Waals forces for excellent frictional adhesion.

The present invention designs a new ECG electrode structure in combination with the adsorption characteristics of this material, improves the stability of ECG signals collected by fabric electrodes, reduces baseline drift and noise introduction, thereby improving the quality of ECG signals and facilitating Later signal processing.

Preferably, the fabric wire includes a conductive fabric transmission line arranged concentrically from inside to outside, an insulating and waterproof nylon layer, a conductive fabric shielding layer and an outer layer of cotton cloth. The use of insulating and waterproof nylon layer can insulate and waterproof the internal conductive fabric transmission line to prolong the service life; the use of conductive fabric shielding layer can effectively shield the interference between the three electrode signals and the external electromagnetic interference; the use of cotton cloth outer layer can improve the fabric wire Comfort when in contact with the human body.

Preferably, both the conductive fabric and the conductive fabric transmission line use silver-impregnated conductive fabric. Using dry fabrics such as silver-impregnated conductive fabrics as conductive fabrics has clearer waveforms of ECG characteristic waves in signals obtained from traditional Ag/AgCl wet electrodes, reliable work, reusability and better comfort.

Preferably, the position below the chest of the wearable garment is provided with a node interface, and four connecting female heads are arranged on the node interface, wherein two connecting female heads are respectively connected to two ECG electrodes through fabric wires, and the other two are connected to The female head is connected to both ends of the fabric breathing sensor through fabric wires;

The signal processing node is provided with four connection males corresponding to the four connection females, two of which are respectively connected to the two signal input terminals of the ECG signal processing module, and the other two connection males are connected to the The two signal input ends of the respiratory signal processing module are connected; through the docking and matching of the connecting male head and the connecting female head, the dark buckle docking and circuit connection between the signal processing node and the node interface are realized. This connection method can easily remove the signal processing node from the wearable clothing, which is convenient for daily wearing and cleaning of the wearable clothing, and at the same time ensures the connectivity of the circuit.

Further, a temperature detection hole is provided at the center of the four connecting male heads on the signal processing node, and an opening is provided at the corresponding position of the node interface; the body temperature measurement module adopts an infrared temperature sensor, and is installed on the signal through the opening. The temperature detection hole on the processing node ensures that the infrared temperature sensor integrated on the signal processing node can directly measure the body surface temperature.

Preferably, the wearing garment is elastic tights. The use of elastic tights as wearable clothing can make the sensing layer of the ECG electrode always adhere to the surface of the human skin, ensuring the reliability and effectiveness of ECG signal acquisition; it can also ensure that the elastic fabric breathes always fit the surface of the human abdomen, ensuring Sensitivity and reliability of respiratory signal acquisition.

Beneficial effects: Compared with the prior art, a wearable multi-physiological parameter acquisition device provided by the present invention has the following advantages: 1. The electrode fixing layer is used to ensure the relative fixation between the sensing layer and the human body, reducing the sliding of ECG electrodes , which greatly improves the quality of the collected ECG signals; 3. The respiratory sensor designed with conductive fabric is embedded in the wearable clothing, which is soft and elastic, and can realize the comfortable monitoring of human breathing; 4. Can be used in daily life The device realizes continuous monitoring and recording of multiple physiological parameters of the user, and is reusable and comfortable.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the embodiment of the present invention;

Fig. 2 is a schematic structural diagram of a node interface in an embodiment of the present invention;

Fig. 3 is a schematic structural view of a central electrical electrode in an embodiment of the present invention;

Fig. 4 is a schematic cross-sectional view of a fabric breathing sensor in an embodiment of the present invention;

Fig. 5 is a schematic cross-sectional view of a fabric wire in an embodiment of the present invention;

FIG. 6 is a control schematic diagram of a signal processing node in an embodiment of the present invention;

The figure includes: 1. Wearable clothing, 2. Fabric breathing sensor, 3. Fabric wire, 4. Fabric electrode, 5. Signal processing node, 6. Temperature detection hole, 7. Node interface, 8. Conductive fabric, 9. Memory Sponge, 10, electrode fixing layer, 11, through hole, 12, strip-shaped elastic conductive fabric, 13, cotton isolation lining layer, 14, cotton cloth outer layer, 15, conductive fabric shielding layer, 16, insulating waterproof nylon layer, 17. Conductive fabric transmission line.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

As shown in Figure 1, it is a wearable multi-physiological parameter acquisition device, which is characterized in that it includes a wearable garment 1, two ECG electrodes 4, a fabric respiration sensor 2, a signal processing node 5 and a fabric wire 3;

Wherein, the electrocardiographic electrodes 4 are respectively arranged on the inner side of the clothing 1 under the left sternum and the right sternum, and the fabric respiration sensor 2 is made by sewing a belt-shaped elastic conductive fabric 12 on the inside of the clothing 1 around the abdomen. The signal processing node 5 is set at the position below the chest of the wearable garment 1, and includes a microprocessor and its peripheral body temperature measurement module, triaxial acceleration sensor, ECG signal processing module and respiratory signal processing module; ECG signal processing module The two signal input ends of the sensor are respectively connected to the two ECG electrodes 4 through the fabric wire 3, and the two signal input ends of the respiratory signal processing module are connected to the two ends of the fabric respiration sensor 2 through the fabric wire 3; the body temperature measurement module, three-axis The signal output ends of the acceleration sensor, the ECG signal processing module and the respiratory signal processing module are all connected to the microprocessor, and the microprocessor performs data transmission with the mobile terminal through the built-in Bluetooth communication module.

As shown in Figure 3, the electrocardiographic electrode 4 includes a base layer, a signal transmission layer, an electrode fixing layer 10, a supporting layer, and a sensing layer arranged from the outside of the clothing 1 towards the skin; Clothing 1, and the signal transmission layer is fabric wire 3; the support layer is oblate memory foam 9 with a diameter of 4cm-5cm and a thickness of 5mm-7mm, the sensing layer is made of conductive fabric 8; the electrode fixing layer 10 is close to the skin One side is provided with a cylindrical groove with a diameter of 4cm-5cm and a depth of 3mm-5mm, and a conductive fabric 8 wrapped with a memory foam 9 is arranged in the groove; a through hole with a diameter of 6mm-10mm is arranged at the center of the groove 11. The fabric wire 3 is connected to the conductive fabric 8 through the through hole 11, and the side of the electrode fixing layer 10 contacting the skin is sticky.

As shown in Figure 4, the inner side of the wearing garment 1 is provided with a cotton isolation inner liner 13, and the strip-shaped elastic conductive fabric 12 and the fabric wire 3 are all arranged between the wearing garment 1 and the cotton isolation inner liner 13, thereby Realize the isolation of strip-shaped elastic conductive fabric 12 and fabric wire 3 from the abdominal skin, prevent measurement interference caused by contact, and enhance comfort at the same time; electrode fixing layer 10 is a flat cylinder with a diameter of 6cm-7cm, and is fixed on cotton Insulate the lining layer 13, so as to achieve the purpose of combining the clothing with the electrocardiographic electrode 4.

In the present invention, the wearable garment 1 is made of comfortable fabric with better elasticity and air permeability; the electrode fixing layer 10 is made of biocompatible, silica gel-based GeckTech material, and the side close to the skin has adsorption without causing irritation.

As shown in Figure 5, the fabric conductor 3 includes a conductive fabric transmission line 17, an insulating waterproof nylon layer 16, a conductive fabric shielding layer 15 and a cotton cloth outer layer 14 concentrically arranged from the inside to the outside; the conductive fabric 8 and the conductive fabric transmission line 17 Both use silver impregnated conductive fabric.

As shown in Figure 2, the position below the chest of the wearable garment 1 is provided with a node interface 7, and the node interface 7 is provided with four connecting female heads, wherein two connecting female heads are respectively connected to two ECGs through the fabric wire 3. The electrodes 4 are connected, and the other two connecting females are connected to the two ends of the fabric breathing sensor 2 through the fabric wire 3;

The signal processing node 5 is provided with four connection males respectively corresponding to the four connection females, two of which are respectively connected to the two signal input ends of the ECG signal processing module, and the other two connection males It is connected to the two signal input terminals of the respiratory signal processing module; through the docking and matching of the connecting male head and the connecting female head, the concealed docking and circuit connection between the signal processing node 5 and the node interface 7 are realized.

In this embodiment, a temperature detection hole 6 is provided at the central position of the four connecting male heads on the signal processing node 5, and an opening is provided at a corresponding position on the node interface 7; the body temperature measurement module adopts an infrared temperature sensor, and wears The via hole is installed at the temperature detection hole 6 on the signal processing node 5 .

In this embodiment, the wearable garment 1 is elastic tights, and the signal processing node 5 adopts a square box of 6cm×6cm; The processor is equipped with modules such as data cache, data processing and power management; the ECG signal processing module uses the integrated ECG digital front-end chip BMD101 to perform amplification, filtering and analog-to-digital conversion processing on the ECG signal, and digitize the ECG signal through UART communication. The ECG signal and heart rate value are sent to the microprocessor; the temperature sensor adopts the infrared temperature sensor MLX90615, and realizes the non-contact measurement of body temperature through the temperature detection hole 6; the three-axis acceleration sensor adopts the digital three-axis acceleration sensor MPU0605, which can real-time Collect the user's motion acceleration to realize posture or fall detection; the respiratory signal processing module uses an analog circuit to detect the resistance of the fabric respiratory sensor 2, and converts the signal into a digital voltage value through the built-in analog-to-digital converter of NRF51822, thereby realizing Real-time monitoring of human respiration.

The specific embodiment of the present invention is as follows:

After the user puts on the wearable clothing 1, the ECG electrode 4 is adsorbed on the skin of the human body detection part through the electrode fixing layer 3, and the butt joint of the connecting male head and the connecting female head is realized at the lower chest of the wearing clothing 1. The signal processing node 5 and the node interface 7 are connected with the hidden buckle and the circuit is connected;

As shown in Figure 6, the ECG electrodes set at the left subclavian and right subclavian are used to collect ECG signals according to the standard I-lead mode, and the integrated digital front-end chip of the ECG signal processing module is used for amplification and filtering. Analog-to-digital conversion, the digital signal is input into the microprocessor, and uploaded to the mobile terminal through the built-in Bluetooth communication module; the body temperature of the human body can be collected in real time by using a digital infrared temperature sensor, and uploaded to the mobile terminal through the built-in Bluetooth communication module of the microprocessor. The mobile terminal realizes real-time monitoring of body temperature; the elastic strip-shaped conductive fabric is embedded in the inner side of the wearer's abdomen in a ring shape, and the circumference change of the abdomen caused by breathing will also cause the deformation of the strip-shaped elastic conductive fabric 12, resulting in its resistance. Value change, through the monitoring of the sensor resistance change by the respiratory signal processing module, and then realize the real-time monitoring of human respiration; the signal output by the three-axis acceleration sensor is relatively stable when the human body is in normal activities, but when abnormal actions (such as falling) , the output signal of the sensor will change drastically, and it is easy to monitor abnormal actions through the degree of change;

After use, the signal processing node 5 is removed from the wearable garment 1, and the electrocardiographic electrode 4 is removed through a certain angle, so that the wearable garment 1 can be taken off for cleaning and reused.

The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications are also possible. It should be regarded as the protection scope of the present invention.

Claims (9)

1. a kind of wearable multiple physiological parameter harvester, it is characterised in that including wearing clothing (1), two electrocardioelectrodes (4), Fabric respiration pickup (2), signal processing node (5) and fabric wire (3)；

Wherein, electrocardioelectrode (4) are respectively arranged under left breast clavicle on the inside of wearing clothing (1) infraclavicular with right breast, and are knitted Thing respiration pickup (2) is made up of around abdominal part sewing in a week on the inside of wearing clothing (1) strip-like resilient conductive fabric (12)；Signal The chest lower position that node (5) is arranged at wearing clothing (1) is processed, and including the measurement of bldy temperature mould of microprocessor and its periphery Block, 3-axis acceleration sensor, ECG's data compression module and breath signal processing module；Two of ECG's data compression module Signal input part is connected with two electrocardioelectrodes (4) respectively by fabric wire (3), two signals of breath signal processing module Input is connected with the two ends of fabric respiration pickup (2) by fabric wire (3)；Measurement of bldy temperature module, 3-axis acceleration are passed The signal output part of sensor, ECG's data compression module and breath signal processing module is connected with microprocessor, and microprocessor Device is carried out data transmission by built-in bluetooth communication and mobile terminal.

2. a kind of wearable multiple physiological parameter harvester according to claim 1, it is characterised in that the electrocardioelectrode (4) include by wearing clothing (1) basal layer that lateral skin direction is arranged outward, signal transmitting layer, electrode fixed layer (10), supporting layer And sensing layer；Wherein, the basal layer is wearing clothing (1), and signal transmitting layer is fabric wire (3)；Supporting layer is memory sea Continuous (9), sensing layer are made up of conductive fabric (8)；Electrode fixed layer (10) arranges fluted near the one side of skin, is enclosed with note The conductive fabric (8) for recalling sponge (9) is arranged in groove；Groove center is provided with through hole (11), and fabric wire (3) passes through logical Hole (11) is connected with conductive fabric (8), and the one side of electrode fixed layer (10) contact skin has stickiness.

3. a kind of wearable multiple physiological parameter harvester according to claim 2, it is characterised in that the wearing clothing (1) cotton isolation inner liner (13) is provided with the inside of, and strip-like resilient conductive fabric (12) and fabric wire (3) may be contained within wearing Between clothing (1) and cotton isolation inner liner (13), and electrode fixed layer (10) is fixed in cotton isolation inner liner (13).

4. a kind of wearable multiple physiological parameter harvester according to claim 2, it is characterised in that the electrode is fixed Layer (10), memory foam (9) and groove are cylindrical, and electrode fixed layer (10) adopts GeckTeck materials, and memory foam (9) thickness is not less than the depth of groove.

5. a kind of wearable multiple physiological parameter harvester according to claim 2, it is characterised in that the fabric wire (3) including the conductive fabric transmission line (17), insulative water-proof nylon layer (16), conductive fabric screen layer being arranged concentrically from inside to outside And cotton outer layer (14) (15).

6. a kind of wearable multiple physiological parameter harvester according to claim 5, it is characterised in that the conductive fabric And conductive fabric transmission line (17) oozes solid conductive fabric using silver (8).

7. a kind of wearable multiple physiological parameter harvester according to claim 1, it is characterised in that the wearing clothing (1) chest lower position is provided with node interface (7), and node interface (7) and is provided with four connection females, two of which Connection female is connected with two electrocardioelectrodes (4) respectively by fabric wire (3), and two other connection female passes through fabric wire (3) it is connected with the two ends of fabric respiration pickup (2)；

Four connection males corresponding with four connection females respectively are provided with signal processing node (5), and two of which connects Connect male to be connected with two signal input parts of ECG's data compression module respectively, at two other connection male and breath signal Two signal input parts of reason module are connected；Coordinated with the docking for being connected female by connecting male, realize signal processing node (5) dock and circuit communication with the hidden discount of node interface (7).

8. a kind of wearable multiple physiological parameter harvester according to claim 1, it is characterised in that the signal processing The center of the upper four connections male of node (5) is provided with corresponding position on temperature detection hole (6), and node interface (7) It is provided with perforate；The measurement of bldy temperature module adopts infrared temperature sensor, and is installed on signal processing node (5) through perforate Upper temperature detection hole (6) place.

9. a kind of wearable multiple physiological parameter harvester according to claim 1, it is characterised in that the wearing clothing (1) it is elastic tightss.