Motion electrocardio noise simulation method and device

Abstract

The invention discloses a motion electrocardio noise simulation method and device, and relates to the field of motion electrocardio noise processing. The whole simulation device mainly comprises an overall motion noise simulation part and a single-point motion noise simulation part. The overall motion noise simulation part simulates a human body through a simulation dummy, the whole simulation dummy is fixed on a vibration platform, and motion states of different degrees of the human body are simulated by adjusting the vibration amplitude of the vibration platform. The single-point motion noise simulation part simulates electrode wire jitter, impedance change, abrupt change signals, electrode slice vibration and sweat secretion during human body motion from two factors of polarization voltage and impedance change. And finally, collecting the electrocardiosignals into which the analog noise is introduced so as to obtain the analog motion electrocardiosignals in different motion states.

Description

Technical Field

[0001] The present invention relates to the technical field of motion electrocardiogram noise processing, and in particular to a motion electrocardiogram noise simulation method and device. Background Art

[0002] ECG signals can reflect the state of heart activity and are an important indicator of cardiovascular health. Conventional ECGs are measured when the subject is in a calm state, while exercise ECGs require the subject to be measured under a certain exercise load. During exercise, the heart load increases, and symptoms such as coronary heart disease and myocardial ischemia are easily manifested in ECG signals, so ECG signals during exercise can better reflect the health of the heart.

[0003] However, when exercising, the subject moves vigorously, and the skin and the electrodes will constantly move relative to each other. In addition to the ECG, other bioelectric signals are also generated in large quantities, such as the potential changes caused by the contraction of the lung muscles during breathing. At the same time, if the movement amplitude is too large, sweat will be secreted between the contact surface of the electrode and the skin. These factors will cause the impedance and polarization voltage at the contact point between the skin and the electrode to constantly change during exercise ECG measurement, thereby introducing noise and interfering with the analysis of exercise ECG.

[0004] At present, there are many methods for sports ECG denoising in related fields, such as adaptive filtering and sports ECG denoising based on deep learning. However, there are many factors affecting noise during exercise and the analysis is complicated. These methods cannot really achieve complete denoising. In addition, when filtering, in addition to noise, many useful non-noise signals may also be filtered out, affecting the analysis of sports ECG. Therefore, how to determine the noise signal in sports ECG is an urgent problem to be solved. Summary of the invention

[0005] The purpose of the present invention is to provide a method and device for simulating exercise ECG noise, which can quantitatively simulate the noise introduced into ECG signals by different influencing factors, and provide assistance for denoising and analysis of exercise ECG.

[0006] To achieve the above object, the present invention provides the following solutions:

[0007] A method for simulating electrocardiogram (ECG) exercise, comprising:

[0008] Generate simulated ECG through ECG signal generator;

[0009] The simulated ECG signal is transmitted to the corresponding position of the dummy through the connecting wire, and the electrode sheet is attached to the corresponding collection position of the dummy to collect ECG;

[0010] Determine overall or single-point motion ECG noise simulation;

[0011] Conduct single-point motion ECG noise simulation, confirm the noise type to be simulated, and set parameters for the corresponding module circuit;

[0012] To simulate the sweat secreted during exercise, the device outputs saline according to the set parameters;

[0013] The change of skin-electrode contact impedance during exercise is simulated, and the device changes the impedance value according to the set parameters;

[0014] The polarization voltage generated during exercise is simulated, and the device outputs different electrical signals according to the set parameters and superimposes them with the ECG signal;

[0015] The movement of the electrode and the shaking of the lead wire during exercise are simulated, and the electrode is driven to vibrate and the lead wire is pulled according to the set parameters.

[0016] Preferably, for simulating sweat secreted during exercise, the device outputs physiological saline according to set parameters, specifically including:

[0017] Prepare physiological saline solution with a concentration close to that of human sweat;

[0018] The peristaltic pump is connected to hoses on both sides, one side is used to extract saline solution, and the other side is used to transport the extracted saline solution to the electrode-dummy contact point;

[0019] The peristaltic pump rotates the number of circles corresponding to the set amount of sweat to quantitatively deliver saline solution;

[0020] Based on the parameter settings, the ECG acquisition front end can acquire ECG signals with the influence of sweat introduced.

[0021] Preferably, the skin-electrode contact impedance change during exercise is simulated, and the device changes the impedance value according to the set parameters, specifically including:

[0022] After the impedance simulation circuit is connected to each acquisition site, the contact impedance between the human body and the electrode sheet is simulated. Capacitors are added to the impedance circuit to simulate the decrease of impedance as the signal frequency increases.

[0023] The impedance simulation changes according to the set parameters at a specific amplitude and speed to achieve oscillating changes in impedance and simulate the changes in the contact impedance between the human body and the electrode when the human body moves;

[0024] Based on the set impedance change, the ECG acquisition front end can acquire the ECG signal with the impedance influence factor introduced.

[0025] Preferably, the polarization voltage generated during exercise is simulated, and the device outputs different electrical signals according to set parameters to be superimposed with the ECG signal, specifically including:

[0026] The DAC signal is output through the microcontroller, and a low-frequency and small-amplitude sine wave is output through the DAC to simulate the potential change caused by breathing. The DAC simulates the output of Gaussian white noise to the acquisition front end to simulate the high-frequency noise introduced by muscle electrical activity. For irregular and sudden noise, the DAC of the microcontroller is simulated by outputting different pulses.

[0027] The output DAC electrical signal is superimposed with the ECG signal of one of the channels through an adder with an amplification factor of 1;

[0028] Based on the ECG signal superimposed with the DAC electrical signal, the ECG acquisition front end can acquire the ECG signal with the polarization voltage change introduced.

[0029] Preferably, the movement of the electrode sheet and the shaking of the lead wire during exercise are simulated, and the electrode sheet is driven to vibrate and the lead wire is pulled according to the set parameters, which specifically includes:

[0030] The vibration motor is fixed near the electrode sheet, and the lead wire is fixed on the rotating fan blade of the servo;

[0031] According to the set parameters, the vibration motor vibrates at a certain frequency, driving the electrode sheet to rub against the measurement site of the dummy, simulating the relative movement between the electrode sheet and the skin during exercise;

[0032] According to the set parameters, the servo pulls the lead wire at a certain amplitude and speed to simulate the jitter of the lead wire during movement;

[0033] Based on the motor vibration and the state of the servo pulling the lead wire, the ECG acquisition front end can acquire the ECG signal that introduces the relative motion of the simulated electrodes and the jitter noise of the lead wire.

[0034] Perform overall motion ECG noise simulation to determine the intensity of the motion to be simulated;

[0035] The vibration amplitude of the vibration table is adjusted according to the above-mentioned exercise intensity to drive the overall vibration of the dummy. At the same time, the corresponding collection equipment collects and stores the overall vibration trajectory.

[0036] Preferably, the overall motion ECG noise simulation further includes superposition of different simulation methods in the single-point motion ECG noise simulation:

[0037] According to the intensity of exercise to be simulated, set the parameters of the peristaltic pump, impedance simulation circuit, DAC electrical signal output device, vibration motor and servo at the same time;

[0038] Multiple influencing factors are simultaneously superimposed on the simulated ECG signal, and different noises are simultaneously introduced into the ECG signal during simulated exercise;

[0039] Based on the superposition of different set simulated noise factors, the ECG acquisition front end can acquire ECG signals with multiple noise factors introduced.

[0040] According to the specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0041] The method for simulating motion ECG noise provided by the present invention transmits the simulated ECG to the corresponding position of the simulated dummy through an ECG signal generator, and selects single-point noise simulation or overall noise simulation according to the simulation requirements. Single-point noise simulation is performed, physiological saline is quantitatively extracted by a peristaltic pump to simulate the sweat secretion of the human body during exercise, the impedance of the impedance circuit is controlled to dynamically change, thereby simulating the change of skin-electrode contact impedance during exercise, and the polarization voltage change generated during exercise is simulated by outputting different electrical signals and superimposing them with ECG signals through a DAC circuit, and the relative movement of the electrode sheet and the jitter of the lead wire during exercise are simulated by driving the electrode sheet to vibrate through a vibration motor and pulling the lead wire by a steering gear; overall noise simulation is performed, firstly the overall vibration of human body movement is simulated by vibrating the vibration platform, and then the different simulation methods in the single-point noise simulation are superimposed to simulate the multiple noises generated simultaneously during exercise.

[0042] The present invention also provides a motion electrocardiogram noise simulation device, the device comprising:

[0043] A simulation dummy, used to simulate the human body to generate electrical signals;

[0044] A vibration table, used to simulate overall vibration during movement;

[0045] Single-point motion noise simulation hardware, used to simulate different noises introduced into a single acquisition site during motion;

[0046] Preferably, the simulation dummy comprises:

[0047] ECG collection site, used to simulate the sticking site of the electrode during ECG collection;

[0048] Conductive gel material, used to simulate the conductive part of human skin when it contacts the electrode sheet;

[0049] A simulation dummy shell is used to simulate the volume and shape of a real human body;

[0050] ECG generator connecting line, used to transmit the simulated ECG signal generated by the ECG generator;

[0051] Preferably, the vibration table comprises:

[0052] A vibration bed with adjustable amplitude, used to simulate the overall vibration of the human body in different motion states;

[0053] A trajectory acquisition module is used to acquire the vibration trajectory of the entire vibrating bed;

[0054] Preferably, the single-point motion noise simulation hardware comprises:

[0055] Adjustable impedance circuit, used to simulate the contact impedance between skin and electrode;

[0056] A saline delivery device to quantify sweat produced during simulated exercise;

[0057] Digital-to-analog conversion (DAC) circuit, used to simulate the polarization voltage changes in exercise ECG;

[0058] The vibration motor and servo are used to simulate the relative movement between the electrode and the skin and the jitter of the lead wire when measuring the electrocardiogram in motion.

[0059] Since the technical effect achieved by the motion ECG noise simulation device provided by the present invention is the same as the technical effect achieved by the motion ECG noise simulation method provided by the present invention, it will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0061] Figure 1 A flow chart of the method for simulating motion ECG noise provided by the present invention;

[0062] Figure 2 The embodiment of the present invention introduces a simulated ECG waveform diagram with impedance change;

[0063] Figure 3 The embodiment of the present invention introduces a simulated ECG waveform diagram of polarization voltage change;

[0064] Figure 4 This is a structural block diagram of the simulation dummy provided by the present invention;

[0065] Figure 5 This is a structural block diagram of the motion ECG noise simulation system provided by the present invention;

[0066] Figure 6 This is a schematic diagram of the structure of the simulation dummy provided by the present invention;

[0067] Figure 7 This is a schematic diagram of the structure of the vibration bed portion of the motion ECG noise simulation system provided by the present invention;

[0068] Figure 8 This is a schematic diagram of the structure of the single-point noise simulation part of the sports ECG noise simulation system provided by the present invention;

[0069] In the figure: 601, simulation dummy shell; 602, ECG collection site (the surface is conductive gel material); 603, ECG generator connection line; 701, vibration table; 702, simulation dummy; 703, motion trajectory collection device; 801, impedance simulation circuit; 802, sweat simulation device; 803, polarization voltage simulation device; 804, electrode vibration simulation device; 805, lead wire jitter simulation device DETAILED DESCRIPTION

[0070] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0071] The purpose of the present invention is to provide a method and device for simulating exercise ECG noise, which can quantitatively simulate the noise introduced into ECG signals by different influencing factors, and provide assistance for denoising and analysis of exercise ECG.

[0072] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0073] like Figure 1 As shown, the motion ECG noise simulation method of the present invention comprises:

[0074] Step 101: Set the corresponding parameters according to the motion state to be simulated. When setting the overall system parameters, the present invention needs to determine the motion state to be simulated in order to quantitatively set the parameters of each module. The specific implementation steps are:

[0075] Determine the motion state to be simulated so as to set different parameters based on this motion state.

[0076] The amount of sweat secretion, the movement of the electrodes and lead wires, the impedance change and the degree of polarization voltage change during this exercise state were determined.

[0077] The corresponding module parameters are set according to the degree of change of various influencing factors under the determined motion state.

[0078] Step 102: The ECG signal generator connects the simulated ECG signal to the dummy. The dummy is mainly used as an electrical signal receiving medium to simulate the human body. The simulated ECG signal is generated by the ECG signal generator and transmitted to the dummy. The specific implementation steps are:

[0079] Set the ECG signal generator to a specific mode to output normal simulated ECG signals.

[0080] Connect the connecting wires on the dummy to the ECG signal generator. At this time, the simulated ECG signals generated by the ECG signal generator are transmitted to specific locations on the dummy via the connecting wires. At these specific locations, ECG acquisition can be performed using the ECG signal acquisition front end.

[0081] Step 110: Perform overall noise simulation. When the human body is exercising, there are many factors that affect ECG acquisition, such as muscle vibration, other electrophysiological activities besides ECG, external electrode vibration and lead wire jitter, etc. In order to make the simulated noisy ECG closer to the real exercise ECG, the noise introduced by different factors is simulated from multiple factors, and then quantitatively combined and superimposed to achieve overall noise simulation.

[0082] Step 111: Start the vibration table and vibrate according to the set amplitude.

[0083] The vibration table is Figure 7 In 701, the entire dummy 702 is fixed on a vibration table. When the vibration amplitude is set and the vibration table is started, the vibration table will drive the dummy to vibrate as a whole. The vibration table is used to simulate the overall vibration of the human body during exercise.

[0084] Step 112: Collect the motion trajectory for comparative analysis.

[0085] When the human body is doing exercises such as walking and running, there will be an overall motion trajectory. When the vibrating bed drives the dummy to vibrate, there will also be an overall vibration trajectory. We collect this vibration trajectory for comparison and analysis with the motion trajectory of the real subject in motion. At the same time, this can also better confirm the simulated motion state. The collection equipment is such as Figure 7 As shown in 703, it is fixed on the vibration table together with the dummy to ensure that the same vibration trajectory as the dummy is collected.

[0086] Step 113: Simulate the superposition of multiple different noise factors. As described in step 110, there are many factors that affect ECG acquisition when the human body is in motion, so in this step, multiple different noise factors are simulated and superimposed to achieve simultaneous simulation of multiple noises. At the same time, according to the influence intensity of different factors under different motion states, the simulation intensity of different noise factors is grouped and set to achieve simulation of different motion states. The simulation method of different influencing factors will be described in detail in step 120.

[0087] Step 120: Perform single-point noise simulation. ECG signal acquisition is mainly based on the potential difference between two sites. For example, the I lead method is mainly based on the potential difference between the left arm and the right arm. If the two points undergo the same change, the potential difference will not change, and will not affect the ECG. Therefore, the noise introduced in the exercise ECG can be considered to be caused by inconsistent changes in the two sites or one site changes while the other site does not change. In single-point noise simulation, noise simulation is mainly performed by applying changes to a single site. By quantitatively applying changes, different exercise ECG noise simulations can be achieved separately. The overall simulation device diagram is shown below. Figure 8 shown.

[0088] Step 121: The impedance simulation circuit makes the resistance oscillate according to the set value. Impedance change is one of the most important factors causing ECG changes during exercise. In this step, a 51kΩ resistor and a 47nF capacitor are connected in parallel to simulate the impedance between the skin and the electrode. Because the impedance decreases with the increase of frequency and the time the electrode is attached to the human body, the capacitor is connected in parallel to the resistor to simulate the decrease of the impedance between the skin and the electrode with the increase of frequency. Figure 8 As shown in 801, it is the access position of the impedance simulation circuit. The circuit is connected in each acquisition channel to ensure that similar impedance changes are introduced in each channel, and the impedance change simulation is performed on this basis.

[0089] In this step, the simulated impedance is connected to each acquisition point. At the point where the impedance change simulation is required, a programmable potentiometer is added to simulate the noise by controlling its resistance value to change at a certain speed and amplitude. Figure 2 As shown, this is the ECG waveform collected after the device introduced simulated impedance change.

[0090] Step 122: The peristaltic pump extracts saline solution to the electrode according to the set value. The human body will secrete sweat under a certain exercise intensity. When sweat is secreted between the skin and the electrode, it will introduce noise into the exercise ECG. This step mainly simulates this noise. The schematic diagram of the simulation device is shown in the figure. Figure 8As shown in 802, the catheters at both ends of the peristaltic pump are connected to the physiological saline and the ECG collection point respectively. The specific implementation steps are:

[0091] Prepare physiological saline with a concentration close to that of human sweat to simulate sweat.

[0092] One side of the catheter of the peristaltic pump is fixed in the physiological saline solution, and the other side is fixed at the contact point between the electrode sheet and the dummy, so as to draw the physiological saline solution to a specific site.

[0093] Set the rotation time and speed of the peristaltic pump to quantitatively extract physiological saline to the ECG acquisition site.

[0094] Step 123: The servo pulls the lead wire at a specific speed and amplitude. When measuring ECG during exercise, the lead wire often vibrates and introduces noise. In this step, such noise is simulated. The simulation device is as follows: Figure 8 As shown in 805, a steering gear is used for simulation. The specific implementation steps are:

[0095] Fix the lead wire on the servo blade.

[0096] Set the servo blades to swing back and forth at a specific amplitude and speed.

[0097] The fan blades cause the lead wires to vibrate, pulling the electrodes, thereby introducing noise into the ECG.

[0098] Step 124: The vibration motor drives the electrode to vibrate at a certain intensity. During exercise, the relative movement between the electrode and the skin is one of the main reasons for the introduction of exercise ECG noise. We use the motor vibration to drive the electrode to vibrate to simulate the introduction of this noise. The device and fixed position are as follows: Figure 8 As shown in 804. The specific implementation steps are:

[0099] Fix the vibration motor near the electrode sheet.

[0100] Set the vibration intensity of the vibration motor.

[0101] When the vibration motor vibrates, it drives the electrode sheet to vibrate, thereby introducing noise.

[0102] Step 125: The single-chip microcomputer controls the output of analog noise voltage to be superimposed on the ECG signal. When the human body is in motion, in addition to the ECG, it also generates a variety of different electrical signals, such as the electrical signals generated by the contraction and expansion of the chest during breathing, the electromyography of muscle contraction, and the electrooculography generated by eye movement. These bioelectric signals are regarded as noise when collecting ECG, which will affect the ECG waveform. Therefore, this step uses a single-chip microcomputer to output analog electrical signals through digital-to-analog conversion and superimpose them on the analog ECG for simulation. The simulation device is as follows: Figure 8As shown in 803, it includes a DAC electrical signal generating device for generating polarization voltage changes and an adder circuit for signal superposition. The specific implementation steps are:

[0103] The single-chip microcomputer is controlled to output different electrical signals. A low-frequency, low-amplitude sine wave is used to simulate the respiratory wave; Gaussian white noise is used to simulate high-frequency noise; and a sudden electrical pulse signal is used to simulate the sudden electrical signal generated during exercise.

[0104] The signal of one channel of the simulated ECG is superimposed with the simulated noise output by the microcontroller through an adder with a gain of 1 to introduce noise. Figure 3 As shown, this is the simulated exercise ECG collected after superimposing simulated breathing noise.

[0105] Step 103: Collect ECG signals from the electrode sites on the dummy surface to obtain simulated motion ECG. Through the above steps, simulated motion noise is introduced into the simulated ECG. In this step, the ECG acquisition device can be used to collect ECG from the acquisition sites of the dummy to obtain ECG waveforms and data with simulated motion noise introduced for analysis and processing.

[0106] Based on the above description, the working principle of the exercise ECG simulation method provided by the present invention is:

[0107] Determine the motion state and intensity to be simulated, and set the parameters of each part of the system. For overall noise simulation, the vibration bed is used to simulate the overall motion trajectory, and multiple single-point influencing factors are superimposed to simulate the multiple noises generated simultaneously during exercise. For single-point noise simulation, the skin electrode contact impedance is simulated by an impedance circuit, and its resistance value is dynamically oscillated to simulate the impedance change during exercise; physiological saline is extracted by a peristaltic pump to simulate sweat secretion during exercise, and the peristaltic pump is rotated at a specific speed for a specific time to quantitatively extract physiological saline; the lead wire is pulled by the steering gear to simulate the jitter of the lead wire during exercise; the electrode sheet is driven by a motor to vibrate to simulate the relative displacement between the electrode sheet and the skin during exercise; the polarization voltage change during exercise is simulated by outputting a specific electrical signal through the single-chip microcomputer digital-to-analog conversion and superimposing it with the simulated ECG.

[0108] Based on this, the present invention simulates different noise factors during exercise, and uses the ECG acquisition front end to collect simulated exercise ECG with superimposed noise. Through this, it is possible to further compare and judge the noise components in the ECG collected under the actual exercise state, thereby providing assistance for the analysis and denoising of the neighborhood exercise ECG.

[0109] The present invention also discloses a simulation dummy, such as Figure 4 As shown, the dummy includes:

[0110] The simulation dummy shell 401 is used to simulate the volume and shape of a real human body and fix each simulation module. Figure 6 601 of them.

[0111] The conductive gel material 402 is used to simulate the conductive part when the human skin contacts the electrode sheet, and is located on the surface of the ECG acquisition site.

[0112] The ECG acquisition site 403 is used to simulate the attachment site of the electrode sheet during ECG acquisition. The position distribution of this site is consistent with the position distribution of the real ECG acquisition of the human body, such as Figure 6 As shown in 602.

[0113] The ECG generator connection line 404 is used to transmit the simulated ECG signal generated by the ECG generator, such as Figure 6 As shown in 603, by connecting an ECG generator here, a simulated ECG signal can be transmitted to the dummy.

[0114] The present invention also provides a motion ECG noise simulation device, such as Figure 5 As shown, the device comprises:

[0115] The vibration table 501 is used to simulate the overall vibration of the human body in different motion states.

[0116] The vibration trajectory acquisition module 502 is used to acquire the vibration trajectory of the entire vibration bed. When the vibration table vibrates, this module transmits the vibration trajectory to the host computer.

[0117] The adjustable impedance circuit 503 is used to simulate the contact impedance between the skin and the electrode.

[0118] The physiological saline delivery device 504 is used to quantitatively simulate the sweat produced during exercise.

[0119] The digital-to-analog conversion circuit 505 is used to simulate the polarization voltage change in the electrocardiogram during exercise.

[0120] The vibration motor and the servo 506 are used to simulate the relative movement between the electrode sheet and the skin of the human body and the shaking of the lead wire when measuring the electrocardiogram in motion.

[0121] The working principle and beneficial effects of the above technical solution have been explained in the method section and will not be repeated here.

[0122] In addition, in the schematic diagram of this manual, the I lead method is mainly used for explanation. In addition to this lead method, the II lead, III lead, and chest lead methods can also be used to collect the simulated ECG with motion noise introduced by this device. At the same time, the noise simulation device in the schematic diagram of this device is in a fixed position, such as Figure 8In 804, the motor is fixed at the collection site LA, which only serves to illustrate and demonstrate. Various types of noise simulation devices in this device can flexibly act on different collection sites according to different simulation needs, and the same noise simulation device can also act on multiple collection sites at the same time.

[0123] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the system disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0124] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A method for simulating motion ECG noise, characterized in that: include: Generate simulated ECG through ECG signal generator; The simulated ECG signal is transmitted to the corresponding position of the dummy through the connecting wire, and the electrode sheet is attached to the corresponding collection position of the dummy to collect ECG; Determine overall or single-point motion ECG noise simulation; Conduct single-point motion ECG noise simulation, confirm the noise type to be simulated, and set parameters for the corresponding module circuit; To simulate the sweat secreted during exercise, the device outputs saline according to the set parameters; The change of skin-electrode contact impedance during exercise is simulated, and the device changes the impedance value according to the set parameters; The polarization voltage generated during exercise is simulated, and the device outputs different electrical signals according to the set parameters and superimposes them with the ECG signal; The movement of the electrode and the shaking of the lead wire during exercise are simulated, and the electrode is driven to vibrate and the lead wire is pulled according to the set parameters. Perform overall motion ECG noise simulation to determine the intensity of the motion to be simulated; The vibration amplitude of the vibration table is adjusted according to the above-mentioned exercise intensity to drive the overall vibration of the dummy. At the same time, the corresponding collection equipment collects and stores the overall vibration trajectory.

2. The method for simulating motion ECG noise according to claim 1, characterized in that: To simulate sweat secretion during exercise, the device outputs saline according to the set parameters, including: Prepare physiological saline solution with a concentration close to that of human sweat; The peristaltic pump is connected to hoses on both sides, one side is used to extract saline solution, and the other side is used to transport the extracted saline solution to the electrode-dummy contact point; The peristaltic pump rotates the number of circles corresponding to the set amount of sweat to quantitatively deliver saline solution; Based on the parameter settings, the ECG acquisition front end can acquire ECG signals with the influence of sweat introduced.

3. The method for simulating motion ECG noise according to claim 1, characterized in that: The device simulates the change of skin-electrode contact impedance during exercise, and changes the impedance value according to the set parameters, including: After the impedance simulation circuit is connected to each acquisition site, the contact impedance between the human body and the electrode sheet is simulated. Capacitors are added to the impedance circuit to simulate the decrease of impedance as the signal frequency increases. The impedance simulation changes according to the set parameters at a specific amplitude and speed to achieve oscillating changes in impedance and simulate the changes in the contact impedance between the human body and the electrode when the human body moves; Based on the set impedance change, the ECG acquisition front end can acquire the ECG signal with the impedance influence factor introduced.

4. The method for simulating motion ECG noise according to claim 1, characterized in that: The polarization voltage generated during exercise is simulated. The device outputs different electrical signals according to the set parameters and superimposes them with the ECG signal. Specifically, it includes: The DAC signal is output through the microcontroller, and a low-frequency and small-amplitude sine wave is output through the DAC to simulate the potential change caused by breathing. The DAC simulates the output of Gaussian white noise to the acquisition front end to simulate the high-frequency noise introduced by muscle electrical activity. For irregular and sudden noise, the DAC of the microcontroller is simulated by outputting different pulses. The output DAC electrical signal is superimposed with the ECG signal of one of the channels through an adder with an amplification factor of 1; Based on the ECG signal superimposed with the DAC electrical signal, the ECG acquisition front end can acquire the ECG signal with the polarization voltage change introduced.

5. The method for simulating motion ECG noise according to claim 1, characterized in that: Simulate the movement of the electrode and the jitter of the lead wire during exercise, drive the electrode to vibrate and pull the lead wire according to the set parameters, including: The vibration motor is fixed near the electrode sheet, and the lead wire is fixed on the rotating fan blade of the servo; According to the set parameters, the vibration motor vibrates at a certain frequency, driving the electrode sheet to rub against the measurement site of the dummy, simulating the relative movement between the electrode sheet and the skin during exercise; According to the set parameters, the servo pulls the lead wire at a certain amplitude and speed to simulate the shaking of the lead wire during movement; Based on the motor vibration and the state of the servo pulling the lead wire, the ECG acquisition front end can acquire the ECG signal that introduces the relative motion of the simulated electrodes and the jitter noise of the lead wire.

6. The method for simulating motion ECG noise according to claim 1, characterized in that: The overall motion ECG noise simulation also includes the superposition of different simulation methods in the single-point motion ECG noise simulation: According to the intensity of exercise to be simulated, set the parameters of the peristaltic pump, impedance simulation circuit, DAC electrical signal output device, vibration motor and servo at the same time; Multiple influencing factors are simultaneously superimposed on the simulated ECG signal, and different noises are simultaneously introduced into the ECG signal when simulating exercise; Based on the superposition of different set simulated noise factors, the ECG acquisition front end can acquire ECG signals with multiple noise factors introduced.

7. A motion ECG noise simulation device, characterized in that: include: A simulation dummy is used to simulate the human body to generate electrical signals; A vibration table, used to simulate overall vibration during movement; Single-point motion noise simulation hardware is used to simulate different noises introduced into a single acquisition site during motion.

8. The motion ECG noise simulation device according to claim 7, characterized in that: The simulation dummy comprises: ECG collection site, used to simulate the sticking site of the electrode during ECG collection; Conductive gel material, used to simulate the conductive part of human skin when it comes into contact with the electrode sheet; A simulation dummy shell is used to simulate the volume and shape of a real human body; ECG generator connecting line is used to transmit the simulated ECG signal generated by the ECG generator.

9. The motion ECG noise simulation device according to claim 7, characterized in that: The vibration table comprises: A vibration bed with adjustable amplitude, used to simulate the overall vibration of the human body in different motion states; The trajectory acquisition module is used to acquire the vibration trajectory of the entire vibrating bed.

10. The motion ECG noise simulation device according to claim 7, characterized in that: The single-point motion noise simulation hardware includes: Adjustable impedance circuit, used to simulate the contact impedance between skin and electrode; A saline delivery device to quantify sweat produced during simulated exercise; Digital-to-analog conversion (DAC) circuit, used to simulate the polarization voltage changes in exercise ECG; The vibration motor and servo are used to simulate the relative movement between the electrodes and the skin of the human body and the jitter of the lead wire when measuring the electrocardiogram during exercise.

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