CN116919803A

CN116919803A - Intelligent vest for cooperative work of cardiopulmonary resuscitation and electric defibrillation

Info

Publication number: CN116919803A
Application number: CN202310717270.3A
Authority: CN
Inventors: 杨佩燃; 陈万; 胡邓; 余海燕
Original assignee: Chongqing University of Post and Telecommunications
Current assignee: Chongqing University of Post and Telecommunications
Priority date: 2023-06-16
Filing date: 2023-06-16
Publication date: 2023-10-24

Abstract

The invention belongs to the field of medical appliances, and in particular relates to an intelligent vest for cooperative work of cardiopulmonary resuscitation and electric defibrillation, which comprises the following components: the heart rate acquisition device comprises an electric defibrillation module, a heart rate acquisition module, an airway opening auxiliary module, a cardiopulmonary resuscitation module, a central module and a vest; the heart rate acquisition module consists of four parts, namely a polypyrrole fabric electrode, a conditioning circuit, an automatic data acquisition circuit ADC and a memory; the air passage opening auxiliary module consists of an inflator pump, a hose, a neck jacking air bag and a jaw jacking air bag, and the neck jacking air bag and the jaw jacking air bag are connected with the inflator pump through the hose; the cardiopulmonary resuscitation module consists of a presser and a telescopic belt; the central module consists of a programming controller, an independent power supply, an electric device, an alarm and a resistance measurer; the intelligent vest for the collaborative work of cardiopulmonary resuscitation and electric defibrillation, which is designed by the invention, belongs to a wearable medical device, so that a patient can be separated from a ward to improve the life quality, and the problem that the traditional cardiopulmonary resuscitation and electric defibrillation instrument cannot rescue in time is solved.

Description

Intelligent vest for cooperative work of cardiopulmonary resuscitation and electric defibrillation

Technical Field

The invention belongs to the field of medical appliances, and particularly relates to an intelligent vest for cooperative work of cardiopulmonary resuscitation and electric defibrillation.

Background

For patients with cardiac arrest, 4 minutes is a golden rescue time, cardiopulmonary resuscitation is performed within 4 minutes, and about 50% of rescue success rate is achieved; meanwhile, the AED is matched for electric shock defibrillation, and the rescue success rate can reach 90%. And every 1 minute delay, the success rate of emergency treatment is reduced by 10%. Beyond 10 minutes, survival rates are greatly reduced. Traditional cardiopulmonary resuscitation devices, such as rukas (LUCAS), wil first aid cardiopulmonary resuscitation machine (WeilMcc), etc., are all pressed by point, but traditional cardiopulmonary resuscitation products have one common point, namely, only pressing; in the case of sudden cardiac arrest, the presence of a person is required to activate the auxiliary device, or to perform cardiopulmonary resuscitation manually. In this case, the patient often misses the optimal rescue opportunity and even causes death. While the defibrillation equipment used in hospitals often cannot meet the requirement of on-site first aid, the later-appearing automatic external defibrillator can help to perform early-stage electric defibrillation, the timely rescue of the patients outside the hospital still cannot be ensured, and even a part of patients need to be monitored in bed, so that the life of the patients is greatly influenced.

Disclosure of Invention

In order to solve the problems in the prior art, the invention provides an intelligent vest for cooperative work of cardiopulmonary resuscitation and electric defibrillation, which comprises: the heart rate acquisition device comprises an electric defibrillation module, a heart rate acquisition module, an airway opening auxiliary module, a cardiopulmonary resuscitation module, a central module and a vest;

the electric defibrillation module consists of a front electrode and an outer electrode, wherein the front electrode is arranged on the front side of the vest, and the outer electrode is arranged on the left side;

the heart rate acquisition module consists of four parts, namely a polypyrrole fabric electrode, a conditioning circuit, an automatic data acquisition circuit ADC and a memory, wherein the polypyrrole fabric electrode is connected with the conditioning circuit, the output end of the conditioning circuit is connected with the automatic data acquisition circuit ADC, and the output data of the automatic data acquisition circuit ADC is stored in the memory;

the air passage opening auxiliary module consists of an inflator pump, a hose, a neck jacking air bag and a jaw jacking air bag, and the neck jacking air bag and the jaw jacking air bag are connected with the inflator pump through the hose; wherein the neck jacking air bag is positioned at the rear neck of the vest, and the jaw jacking air bag is positioned at the neckline of the vest;

the cardiopulmonary resuscitation module consists of a presser and a telescopic belt, wherein the presser is divided into an upper presser and a lower presser, the upper presser is positioned at a position 1/3 of the position of the vest corresponding to the sternum of the human body and presses the chest; the lower pressing device is arranged at the abdomen position of the vest, presses the abdomen, and alternately works;

the central module consists of a programming controller, an independent power supply, an electric device, an alarm and a resistance measurer, and controls the cardiopulmonary resuscitation module and the electric defibrillation module according to the data acquired by the heart rate acquisition module.

Preferably, the electric defibrillation module adopts a high-voltage charging circuit and a bidirectional discharging circuit, and the high-voltage charging circuit adopts a flyback charging circuit; the bidirectional discharge circuit consists of an H-bridge insulated gate bipolar transistor IBGT, a driving circuit and a discharge protection circuit, and realizes biphase exponential waveform discharge.

Preferably, the polypyrrole fabric electrodes in the heart rate acquisition module are 4 and are respectively positioned at the left and right sternum handles and the left and right lower abdomen parts and used for acquiring heart rate signals of a user; the collected heart rate signals are input into a conditioning circuit for hardware filtering, multistage amplification and optocoupler isolation treatment; the processed signals are input into an automatic data acquisition circuit ADC, digital filtering processing is carried out through a finite impulse response FIR, and the average heart rate of the filtered signals is obtained through a convolution method.

Preferably, the independent power supply is a fixed voltage stabilizing module and is used for supplying power to the alarm and the resistance measurer.

Preferably, the electric device comprises a power supply, an electrode assembly, a rotating shaft assembly, a power assembly and a signal transmission module; the power supply is respectively connected with the power assembly, the electrode assembly and the programming controller in the central module and is used for supplying power to the whole system; the input end member signal transmission module of the electrode assembly is connected, and the output current of the electrode assembly is controlled by a signal output by the signal transmission module; the power assembly is respectively connected with the signal transmission module and the rotating shaft assembly, the rotating shaft assembly is respectively connected with the upper pressing device and the lower pressing device, the power assembly is used for receiving signals sent by the signal transmission module and providing power for the rotating shaft assembly through the received signals, and the rotating shaft assembly is used for converting the power into the pressure of the upper pressing device and the lower pressing device; the signal transmission module is used for converting the instruction transmitted by the programming controller into an electric signal and transmitting the point signal to the electrode assembly and the power assembly.

Further, the electric device further comprises a charging module, wherein the charging module is a USB interface and is used for charging the power supply.

Preferably, the resistance measurer is used for measuring transthoracic impedance between the two discharge electrodes.

The invention has the beneficial effects that:

the intelligent vest for the collaborative work of cardiopulmonary resuscitation and electric defibrillation, which is designed by the invention, belongs to a wearable medical device, so that a patient can be separated from a ward to improve the quality of life, and meanwhile, the problem that the traditional cardiopulmonary resuscitation and electric defibrillation instrument cannot rescue in time is solved, so that the patient can obtain rescue without external assistance; the invention combines electric defibrillation with cardiopulmonary resuscitation, realizes the simultaneous implementation of chest compression and electric defibrillation, avoids delayed rescue caused by equipment replacement, effectively improves the rescue success rate and increases the survival possibility of patients.

Drawings

FIG. 1 is a diagram of a smart vest for co-operating cardiopulmonary resuscitation and defibrillation of the present invention;

FIG. 2 is a block diagram of a heart rate acquisition module of the present invention;

FIG. 3 is a schematic diagram of a heart rate acquisition module according to the present invention;

FIG. 4 is a schematic diagram of an automatic data acquisition circuit of the present invention;

FIG. 5 is a block diagram of an airway opening assist module;

FIG. 6 is a block diagram of a lower presser;

FIG. 7 is a telescopic principle diagram of the telescopic belt;

FIG. 8 is a schematic diagram of a cardiopulmonary resuscitation module of the present invention;

FIG. 9 is a system architecture diagram of the present invention;

FIG. 10 is a system workflow diagram of the present invention;

FIG. 11 is a primary enlarged circuit diagram of the present invention;

FIG. 12 is a low pass filter circuit diagram of the present invention;

FIG. 13 is a high pass filter circuit diagram of the present invention;

FIG. 14 is a two-stage amplification circuit diagram of the present invention;

fig. 15 is a schematic diagram of an optocoupler isolation circuit according to the present invention.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

A smart vest for cardiopulmonary resuscitation and defibrillation co-operation, as shown in fig. 1, comprising: the heart rate acquisition device comprises an electric defibrillation module, a heart rate acquisition module, an airway opening auxiliary module, a cardiopulmonary resuscitation module, a central module and a vest; the electric defibrillation module consists of a front electrode and an outer electrode, wherein the front electrode is arranged on the front side of the vest, and the outer electrode is arranged on the left side; the heart rate acquisition module consists of four parts, namely a polypyrrole fabric electrode, a conditioning circuit, an automatic data acquisition circuit ADC and a memory, wherein the polypyrrole fabric electrode is connected with the conditioning circuit, the output end of the conditioning circuit is connected with the automatic data acquisition circuit ADC, and the output data of the automatic data acquisition circuit ADC is stored in the memory; the air passage opening auxiliary module consists of an inflator pump, a hose, a neck jacking air bag and a jaw jacking air bag, and the neck jacking air bag and the jaw jacking air bag are connected with the inflator pump through the hose; wherein the neck jacking air bag is positioned at the rear neck of the vest, and the jaw jacking air bag is positioned at the neckline of the vest; the cardiopulmonary resuscitation module consists of a presser and a telescopic belt, wherein the presser is divided into an upper presser and a lower presser, the upper presser is positioned at a position 1/3 of the position of the vest corresponding to the sternum of the human body and presses the chest; the lower pressing device is arranged at the abdomen position of the vest, presses the abdomen, and alternately works; the central module consists of a programming controller, an independent power supply, an electric device, an alarm and a resistance measurer, and controls the cardiopulmonary resuscitation module and the electric defibrillation module according to the data acquired by the heart rate acquisition module.

In this embodiment, the electric defibrillation module is composed of chest electrodes, the chest electrodes are divided into front electrodes and outer electrodes, the front electrodes are located between the 2 nd to 4 th intercostals of the right collarbone midline of the human body corresponding to the vest, and the outer electrodes are located at the intersection points of the 4 th to 5 th intercostals of the left nipple of the human body corresponding to the vest and the axillary midline, and the front electrodes and the outer electrodes work simultaneously.

In order to reduce the discomfort of the patient in wearing for a long time, the two electrode patches can be separated from the human body by a small amount when not working, and the electrode patches are controlled by the transmission device to be attached to the human body when working (1) so as to ensure full contact. The corresponding position of the patient needs to be cleared in advance) (2) the programmed controller instructs the defibrillation electrode to automatically spray conductive gel, the defibrillation electrode plate is adhered to the skin of the human body to form a conductive loop, and one-time spraying of the gel can ensure the defibrillation for a plurality of times within 24 hours, but the gel needs to be cleared and supplemented (the corresponding position of the patient needs to be cleared in advance).

In this embodiment, the defibrillation circuit employs a high voltage charging circuit and a bidirectional discharging circuit. The flyback charging circuit is used in the high-voltage charging circuit, the circuit is simple in structure, belongs to a nonlinear circuit, is more complex than the forward charging circuit in working principle, can charge high voltage above 1000V in a short time without high turn ratio, and can accurately control the charging capacity of the energy storage capacitor through the high-voltage monitoring circuit, wherein a block diagram of the high-voltage charging circuit is shown in fig. 2. When the whole charging circuit is powered by using direct current 9V, 150J of electric quantity can be charged into the energy storage capacitor within 7s, and the charging voltage exceeds 1700V, so that quick and efficient charging is realized. The biphase discharge circuit consists of an H-bridge insulated gate bipolar transistor (IBGT), a driving circuit and a discharge protection circuit, can realize biphase exponential waveform discharge, can provide an isolated driving requirement exceeding 2 500V, and can finish the on-off of the Insulated Gate Bipolar Transistor (IGBT) within 1 mu s.

In this embodiment, the heart rate acquisition module is composed of four parts including polypyrrole fabric electrodes, a conditioning circuit, an automatic data Acquisition (ADC), and a memory. The fabric electrode takes cotton plain weave as base cloth, anthraquinone-2-sodium sulfonate (AQPA-Na) is selected as a doping agent of the polypyrrole fabric electrode, neutral or acidic electrolyte composed of AQPA-Na and pyrrole is applied with voltage, and finally the polypyrrole conductive fabric electrode is polymerized on the electrode. The polypyrrole-plated fabric electrode has the advantages of good conductivity, low self impedance, good comfort, no toxicity, low cost, light weight, uniformity and thickness, is in direct contact with the skin, does not need to use electrolytic gel or adhesive, and effectively solves the problems that the traditional silver-silver chloride (Agcl/Ag) wet electrode is easy to cause skin allergy and irritation after long-term use, and the conductive gel is dried gradually along with the extension of the monitoring time, the impedance between the electrode and the skin is increased, and the like. The polypyrrole fabric electrode consists of polypyrrole fabric, a sponge filling layer and a supporting pad, is sewn on the inner side of the wearing garment and is in direct contact with human skin, 4 electrodes are respectively positioned at the left and right sternum handles and the left and right lower abdomen positions, accuracy and usability of acquired signals are guaranteed, and the structure is shown in figure 2. The left and right sternal handle electrodes and the left and lower abdomen electrode are connected with the input end of the conditioning circuit through wires to provide the lead electrocardiosignals for simulating the I, II and III of the human body, the electrode of the right lower abdomen is used for simulating the driving of the right leg to inhibit interference, and the connection mode is shown in an eleventh figure.

The conditioning circuit consists of a primary amplifying circuit, an active high-pass filter circuit, an active power frequency filter circuit, a passive low-pass filter circuit, a secondary amplifying circuit and an optical coupling isolation circuit, and the principle of the conditioning circuit is shown in figure 3.

The first-stage amplifying circuit uses a signal amplifier (AD 620 AN) with high input impedance, high common mode rejection ratio, low noise and low drift, uses a function generator as a signal source VSIN thereof, wherein the signal source is a sine wave with the amplitude of V1 = 10mV and the frequency of f0 = 80HZ, the function generator outputs a sine signal according to the minimum waveform amplitude (10 mV), and then obtains AN analog signal of the human ECG through the knowledge of parallel resistor voltage division. The signal amplifier (AD 620) drives a direct current voltage stabilizing source with the voltage of +/-12V, and the circuit diagram is shown in figure 11. The low-pass filter adopts TL084 and has the main functions of voltage amplification and low-pass filtering, and is characterized in that the amplification gain of the part in all amplification modules is highest, and the circuit diagram is shown in figure 12.

Since all frequency components in the electrocardiosignal are commercial 0.05Hz, the 0.05Hz is set as the cut-off frequency of a high-pass filter which is mainly used for isolating the direct-current voltage signal and the influence of the voltage difference formed by the stage effect, thereby extracting the required electrocardiosignal, and the circuit diagram is shown in figure 13.

The use of only a primary amplifying circuit to amplify the electrocardiosignal is far from sufficient, and after the signal passes through the circuits, the amplitude of the signal is amplified to a certain extent, and most of noise is filtered, so that the remaining useful signal can be further amplified by using a secondary amplifying circuit. The circuit is shown in fig. 14.

In order to further ensure the absolute life safety of the tested person and eliminate the interference current in the ground wire, an optical coupler isolation circuit is arranged, and a circuit diagram is shown in fig. 15.

In addition to the design of the high and low pass filtering peripheral circuits, a reference electrode is also present in the ECG three electrode acquisition for suppressing common mode signals generated by the power supply signal or other sources of interference, forming a right leg drive circuit. This is commonly used in bioelectric signal acquisition systems to adjust the circuit common mode signal operating point.

In this embodiment, the automatic data Acquisition (ADC) uses an STM32F103ZET6 chip, which contains a 12-bit ADC analog-to-digital converter inside, the highest sampling frequency can reach 1MHz, the obtained digital value is multiplied by 3.3, and then divided by 4096, which is the converted voltage value. Because the electrocardiosignal noise sources are mostly from myoelectricity and power frequency interference, motion artifacts and baseline drift caused by respiration or limb movement, the fitting of the minimum mean square error between the frequency response of a digital filter and a design index is realized by using a Finite Impulse Response (FIR) filtering method, and the problem of numerical stability when the minimum mean square error solution is directly solved is avoided. And because the motion artifact is a main interference source of the electrocardiosignal, the motion artifact is restrained by adopting a method based on a periodic element analysis according to the time domain transient characteristic of the motion artifact and the inherent periodic characteristic of the physiological signal. The memory uses flash memory (TF) card to store, the TF card is superior to data Safety (SD) card in size and performance, and the working voltage is 2.7V-3.6V. The electrical signals collected by the polypyrrole fabric electrodes are subjected to hardware filtering, multistage amplification and optocoupler isolation by a conditioning circuit, then subjected to Automatic Data Collection (ADC), smoothed by Finite Impulse Response (FIR) digital filtering to obtain the average heart rate and stored by a convolution method, and the principle is shown in figure 4.

As shown in fig. 5, the airway opening auxiliary module is composed of an inflator, a hose, a neck jack-up airbag, and a jaw jack-up airbag. The inflator pump is connected with a main power supply, the front end is provided with an air suction port, the two sides are provided with inflation ports, and the inflation ports are respectively connected with the neck jacking air bag and the jaw jacking air bag through hoses. The neck jacking air bag is positioned at the rear neck of the vest and is in a transverse cylindrical shape after being inflated; the jaw jack-up gasbag is located vest collarband department, takes on "l" shape after the inflation. When the programming controller detects abnormal heart rate, the inflating pump is controlled to be started, the neck and jaw jack-up air bag is opened, and the connection line of the mandibular angle and the earlobe is ensured to form an angle of 80-90 degrees with the ground. The device can keep the airway open at the correct position all the time in the whole treatment process of the patient without moving the patient, and avoid the secondary injury of the cervical vertebra caused by taking the head-up posture for the patient with cervical vertebra injury.

The cardiopulmonary resuscitation module consists of a presser and a telescopic belt, wherein the presser is divided into an upper presser and a lower presser, the upper presser is positioned at a position 1/3 of the position of the vest corresponding to the sternum of the human body and presses the chest; the lower presser is arranged at the abdomen position of the vest, lifts and presses the abdomen, the lower presser and the abdomen work alternately, the pressing frequency is 100-120 times/min, the depth is 5-6 cm, fig. 6 is a structure diagram of the lower presser, and fig. 7 is a telescopic principle diagram of the telescopic belt. In order to reduce the discomfort of long-time wearing of patients, the two pressers are slightly spaced from the human body when not working, the pressers are controlled by the transmission device to be pressed to the human body when working, and simultaneously, the telescopic belts are contracted to be matched for cardiopulmonary resuscitation. As shown in fig. 8, the specific cooperation working principle of the presser and the telescopic belt is as follows: (1) pressing by an upper pressing device, and the telescopic belt is contracted. At this time, the diaphragm moves upwards, the intrathoracic pressure is increased, the air in the lung is discharged, the heart is simultaneously extruded by the upper pressing device and the diaphragm, and the blood in the heart is discharged; (2) the upper presser stops pressing. At this time, the diaphragm moves downwards, the intrathoracic pressure is reduced, the lung sucks gas, and blood flows back; and (3) pressing by a lower pressing device, and shrinking the telescopic belt. At the moment, the diaphragm moves upwards, the intrathoracic pressure is increased, the air in the lung is discharged, the heart is extruded by the diaphragm, the heart blood is discharged, and meanwhile, the intraperitoneal pressure is increased, and the blood flows back; (4) pulling the pressing device. At this time, the diaphragm moves downwards, the intrathoracic pressure is reduced, the air is sucked into the lung, meanwhile, the intraperitoneal pressure is reduced, the heart blood is discharged, and the blood of the lower limbs smoothly flows back.

In this embodiment, the central module is composed of a programming controller, an independent power supply, an electric device, an alarm, and a resistance measurer. The programming controller is used for identifying and analyzing heart rate, resistance, controlling power and the like. The independent power supply is used for supplying power to the alarm and the resistance measurer. The power supply uses an Adenode (ADI) fixed voltage stabilizing module ADP7102, the input voltage range is 3.3-20V, the maximum output current is 300mA, the noise is as low as 15uV/ms, and the power supply is provided for high-precision impedance measurement. The electric device is used for providing power for chest electrodes, and the presser comprises: the device comprises a main power supply, an electrode assembly, a rotating shaft assembly, a power assembly, a signal transmission module and a charging module. The main power supply uses TPS62172 buck converter of Texas Instruments (TI), the voltage range of the input is 3-17V, the output voltage is 3.3V, and the maximum output current is 500mA. The 12V power supply module uses an integrated 5A40V wide power transmission range boosting TPS55340 boosting voltage stabilizer, and the power transmission voltage range is 2.9-32V. The resistance measurer is used for measuring transthoracic impedance between the two discharge electrodes, and when in biphasic discharge, due to fixed discharge energy, proper biphasic discharge pulse width is automatically selected according to the transthoracic positive impedance value, so that the defibrillation threshold can be reduced, the myocardial injury degree can be reduced, and the defibrillation effect can be improved. The measurer uses an Adenode (ADI) special biological impedance measuring chip AD5933, designs a low impedance measuring circuit aiming at the characteristic of smaller chest impedance, and has measuring precision of over 96 percent in the impedance range of 10 omega to 150 omega; when the independent power supply is used and does not work, the power supply is turned off, so that the power consumption is reduced; the use of chest electrodes as measurement electrodes can reduce the complexity of design and use. The alarm is used for sending voice to the patient for conscious detection when the heart rate of the patient reaches the ventricular fibrillation standard. The electronic screen is used to provide messages and graphics to alert the patient when the patient is likely to be hearing impaired and re-hearing.

As shown in fig. 9, the rotating shaft assembly is in engagement with a plurality of gear structures, is fixed with the rotating shaft of the power assembly through the engaged rotating shaft assembly, and is connected with the upper and lower pressing devices; the signal transmission module is connected with the electrode assembly and the power assembly and is used for receiving a control signal from the programming controller and controlling the electric power of the electrode assembly and the power of the power assembly according to the control signal so as to realize different defibrillation energy requirements and different pressing force requirements; the independent power supply is connected with the resistance measurer and the alarm, and the electronic screen is connected, so that the power consumption is reduced when the electronic screen does not work; the resistance measurer is connected with the front electrode and the outer electrode and is used for measuring transthoracic impedance between the two discharge electrodes.

As shown in fig. 10, a workflow of a smart vest for co-operation of cardiopulmonary resuscitation and electric defibrillation comprises: the heart rate sensor collects electric signals through polypyrrole fabric electrodes, calculates the heart rate of a user through a conditioning circuit, automatic Data Collection (ADC), digital filtering and other methods, inputs the collected heart rate of the user into a programming controller, when the programming controller detects that the heart rate of the user is abnormal, turns on an independent power supply, starts an alarm, an electronic screen and a resistance detector, the alarm can send voice to a patient, the electronic screen can provide pictures and information for the patient to carry out consciousness test, if the patient considers false alarm, the electronic screen can be manually closed to prevent cardiopulmonary resuscitation and electric defibrillation in advance, otherwise, the programming controller sends an instruction to start electric defibrillation and cardiopulmonary resuscitation, and the specific implementation mode is as follows: if the heart rate is detected as shockable initially, the programming controller controls the inflator pump to open the cervical and jaw air bags, controls the two chest electrodes to shock once with 200J, then controls the transmission device to perform cardiopulmonary resuscitation for 2 minutes, and then continues to detect the heart rate of the patient; if the heart rate is detected as being non-shockable initially, the programming controller controls the inflator pump to open the cervical and jaw airbags, and the heart-lung resuscitation is performed for 2 minutes first and then the heart rate of the patient is detected continuously. The above steps are repeatedly executed until the heart rate of the patient returns to normal. The whole treatment process does not need external personnel, and the whole process is automatic.

The cardiopulmonary resuscitation frequency is represented by C, the electric defibrillation energy is represented by A, t is cardiopulmonary resuscitation time, and n is the electric defibrillation frequency.

The prior art: c t _T ＝50％，T<＝4

C*t _T +A*n＝90％,T<＝4

C*t _T+1 +A*n＝80％,T＝4

The rescue success rate is: a (C t) _T +A*n)+b*C*t _T

While the foregoing is directed to embodiments, aspects and advantages of the present invention, other and further details of the invention may be had by the foregoing description, it will be understood that the foregoing embodiments are merely exemplary of the invention, and that any changes, substitutions, alterations, etc. which may be made herein without departing from the spirit and principles of the invention.

Claims

1. A smart vest for co-operating cardiopulmonary resuscitation and electrical defibrillation comprising: the heart rate acquisition device comprises an electric defibrillation module, a heart rate acquisition module, an airway opening auxiliary module, a cardiopulmonary resuscitation module, a central module and a vest;

2. The intelligent vest for cooperative work of cardiopulmonary resuscitation and electric defibrillation according to claim 1, wherein the electric defibrillation module employs a high-voltage charging circuit and a bidirectional discharging circuit, and the high-voltage charging circuit employs a flyback charging circuit; the bidirectional discharge circuit consists of an H-bridge insulated gate bipolar transistor IBGT, a driving circuit and a discharge protection circuit, and realizes biphase exponential waveform discharge.

3. The intelligent vest for collaborative work of cardiopulmonary resuscitation and electric defibrillation according to claim 1, wherein the heart rate acquisition module comprises 4 polypyrrole fabric electrodes respectively positioned at left and right sternum handles and left and right lower abdomen positions for acquiring heart rate signals of a user; the collected heart rate signals are input into a conditioning circuit for hardware filtering, multistage amplification and optocoupler isolation treatment; the processed signals are input into an automatic data acquisition circuit ADC, digital filtering processing is carried out through a finite impulse response FIR, and the average heart rate of the filtered signals is obtained through a convolution method.

4. A cardiopulmonary resuscitation and defibrillation co-operative smart vest according to claim 3 in which the formula for demodulating the heart rate signal by the conditioning circuit is:

Vo＝Vm*Xc

Xc＝cos(2πFc*t)

where Vo is the demodulated signal, vm is the peak voltage of the heart rate signal, xc is the modulated signal with respect to Fc, fc is the carrier frequency of the modulated signal, and t is time.

5. The intelligent vest of claim 1, wherein the independent power source is a stationary voltage regulator module for powering the alarm, electronic screen and resistance measurer.

6. The intelligent vest for cooperative cardiopulmonary resuscitation and electric defibrillation according to claim 1, wherein the electric device comprises a power source, an electrode assembly, a rotating shaft assembly, a power assembly and a signal transmission module; the power supply is respectively connected with the power assembly, the electrode assembly and the programming controller in the central module and is used for supplying power to the whole system; the input end member signal transmission module of the electrode assembly is connected, and the output current of the electrode assembly is controlled by a signal output by the signal transmission module; the power assembly is respectively connected with the signal transmission module and the rotating shaft assembly, the rotating shaft assembly is respectively connected with the upper pressing device and the lower pressing device, the power assembly is used for receiving signals sent by the signal transmission module and providing power for the rotating shaft assembly through the received signals, and the rotating shaft assembly is used for converting the power into the pressure of the upper pressing device and the lower pressing device; the signal transmission module is used for converting the instruction transmitted by the programming controller into an electric signal and transmitting the point signal to the electrode assembly and the power assembly.

7. The intelligent vest of claim 6, wherein the power-driven device further comprises a charging module, the charging module being a USB interface, for charging the power source.

8. A cardiopulmonary resuscitation and defibrillation co-operation smart vest according to claim 1 in which the resistance measurer is arranged to measure the transthoracic impedance between the two discharge electrodes.