Electrocardio acquisition system and method and wearable equipment

Abstract

The invention relates to the field of electrocardio acquisition, and provides an electrocardio acquisition system, an electrocardio acquisition method and wearable equipment. The processor is used for comparing characteristic parameters of electrocardiogram pre-scanning signals collected by different electrode arrays so as to select a target electrode array from the plurality of electrode arrays according to a comparison result; and the electrocardio scanning unit is used for controlling the target electrode array to collect electrocardio signals. The flexible electrode array screens out appropriate leads by scanning multi-channel electrocardiogram signals, high-quality electrocardiogram signals are automatically collected for monitoring through the screened electrode array leads, and electrocardiogram sign signals can be monitored in a comfortable and non-inductive mode at any time.

Description

Technical Field

[0001] The present invention relates to the technical field of electrocardiogram acquisition, and in particular to an electrocardiogram acquisition system, method and wearable device. Background Art

[0002] The electrocardiogram (ECG) can record the electrical activity of the heart in real time, providing important information for detecting various heart diseases. The 12-lead ECG is the standard ECG currently used for diagnosing many heart diseases except arrhythmias. However, it is not easy to obtain a 12-lead ECG.

[0003] Currently, wearable devices (such as ECG clothing) and wearable 12-lead ECG devices have very high requirements for wearing in order to eliminate the error caused by the looseness of ECG electrodes on ECG signals. Moreover, these devices have a great impact on patients' daily lives, and their comfort experience is very poor. Among the existing devices, the ECG patch is a relatively comfortable long-term dynamic ECG acquisition device. However, the ECG patch requires gel electrodes to be attached to the chest, which may cause allergies for a long time. In addition, in order to maintain the comfort of wearing, only small batteries can be used, and the poor battery life and real-time data transmission capabilities are greatly limited. Summary of the invention

[0004] The present invention provides an electrocardiogram (ECG) acquisition system, method and wearable device, which are used to solve the technical problems of limited and inaccurate ECG acquisition in the above-mentioned existing ECG acquisition solutions.

[0005] The present invention provides an electrocardiogram acquisition system, comprising:

[0006] multiple electrode arrays;

[0007] A processor, configured to compare characteristic parameters of electrocardiogram pre-scanning signals acquired by different electrode arrays, so as to select a target electrode array from the plurality of electrode arrays according to the comparison result;

[0008] The ECG scanning unit is used to control the target electrode array to collect ECG signals.

[0009] According to an ECG acquisition system provided by the present invention, the processor performs the following operations for each ECG pre-scan signal before comparing the characteristic parameters of the ECG pre-scan signals acquired by different electrode arrays:

[0010] Determine the number of data points to be collected within the time window for acquiring the ECG pre-scan signal according to the sampling frequency and time window of the ECG pre-scan signal;

[0011] Based on the amplitude and phase of the ECG pre-scan signal and the number of the collected data points, the energy value of the ECG pre-scan signal in different preset frequency ranges is determined, so as to use the energy value as a characteristic parameter of the ECG pre-scan signal.

[0012] According to an ECG acquisition system provided by the present invention, the amplitude and phase of the ECG pre-scan signal are determined based on the number of the acquired data points and the fundamental frequency of the ECG pre-scan signal.

[0013] According to an ECG acquisition system provided by the present invention, the calculation model for determining the energy value of the ECG pre-scan signal in different preset frequency ranges based on the amplitude and phase of the ECG pre-scan signal and the number of the acquired data points is: Among them, kf 0 are the amplitude and phase of the ECG pre-scan signal, N is the number of the collected data points, CH(n) is the ECG pre-scan signal collected at the nth data point among the collected data points, e is a natural constant, j is the imaginary part of the complex number, and k is a positive integer.

[0014] According to an ECG acquisition system provided by the present invention, determining the energy value of the ECG pre-scan signal in different preset frequency ranges includes:

[0015] Determining time domain parameters and frequency domain parameters of the ECG pre-scan signal within different preset frequency ranges;

[0016] Based on the time domain parameters and the frequency domain parameters, energy values ​​of the ECG pre-scan signal in different preset frequency ranges are determined.

[0017] According to an electrocardiogram acquisition system provided by the present invention, the multiple electrode arrays include multiple positive electrode arrays and multiple negative electrode arrays;

[0018] The step of comparing the characteristic parameters of the ECG pre-scanning signals collected by different electrode arrays to select a target electrode array from the plurality of electrode arrays according to the comparison result includes:

[0019] Comparing characteristic parameters of the ECG pre-scanning signals collected by each of the positive electrode arrays, and determining the positive electrode array with the largest characteristic parameter among the plurality of positive electrode arrays as the target positive electrode array according to the comparison result;

[0020] Comparing characteristic parameters of the ECG pre-scanning signals collected by each of the negative electrode arrays, and determining the negative electrode array with the largest characteristic parameter among the multiple negative electrode arrays as the target negative electrode array according to the comparison result;

[0021] A combination of the target positive electrode array and the target negative electrode array is used as the target electrode array.

[0022] According to an ECG acquisition system provided by the present invention, before comparing the characteristic parameters of the ECG pre-scan signals acquired by different electrode arrays, the ECG scanning unit is further used to control each electrode array to independently acquire the ECG pre-scan signals of a preset duration.

[0023] The present invention also provides an ECG acquisition method, which is applied to any of the above ECG acquisition systems, comprising:

[0024] Acquire the ECG pre-scanning signals collected by each electrode array;

[0025] Comparing characteristic parameters of the ECG pre-scanning signals collected by the electrode arrays to select a target electrode array from the electrode arrays according to the comparison result;

[0026] The electrocardiogram (ECG) signal is collected through the target electrode array.

[0027] The present invention also provides a wearable device, comprising the electrocardiogram acquisition system as described in any one of the above items.

[0028] According to the wearable device provided by the present invention, the wearable device is an ECG collection belt, an ECG patch or an ECG clothing.

[0029] The present invention also provides a non-transitory computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the electrocardiogram acquisition method described in any one of the above is implemented.

[0030] The ECG acquisition system, method and wearable device provided by the present invention select suitable leads by scanning multi-channel ECG signals through a flexible electrode array, and automatically collect high-quality ECG signals for monitoring through the selected electrode array leads, so that ECG vital signs can be monitored in a comfortable and non-sensitive manner at any time. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are 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.

[0032] Figure 1 It is a schematic diagram of the expansion of the wearable device corresponding to the electrocardiogram acquisition system provided by the present invention;

[0033] Figure 2 It is a flow chart of the electrocardiogram acquisition method provided by the present invention;

[0034] Figure 3It is a structural schematic diagram of the electrocardiogram acquisition device provided by the present invention;

[0035] Figure 4 It is a structural schematic diagram of the electronic device provided by the present invention. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are 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.

[0037] Please refer to Figure 1 The present invention provides an electrocardiogram acquisition system, comprising:

[0038] multiple electrode arrays;

[0039] A processor, configured to compare characteristic parameters of electrocardiogram pre-scanning signals acquired by different electrode arrays, so as to select a target electrode array from the plurality of electrode arrays according to the comparison result;

[0040] The ECG scanning unit is used to control the target electrode array to collect ECG signals.

[0041] Specifically, Figure 1 As shown, Figure 1 This is a schematic diagram of a wearable device corresponding to the ECG acquisition system provided by the present invention. The ECG acquisition system provided by the present invention includes an electrode array, a processor, and an ECG scanning unit. The electrode array includes at least 6 electrodes, among which ch1+, ch2+, and ch3+ are positive electrode arrays; ch1-, ch2-, and ch3- are negative electrode arrays.

[0042] The ECG acquisition system provided by the present invention may further include a first multiplexer, a second multiplexer, and an ECG scanning module (including an ECG measurement unit and an ECG scanning unit). The operation mode of the ECG acquisition system provided by the present invention is as follows:

[0043] 1. The ECG scanning unit controls the first multiplexer to switch the three first electrode array channels (i.e. Figure 1 positive electrode array in );

[0044] 2. The electrocardiogram measurement unit collects constant data in a fixed time window (i.e., the electrocardiogram scanning signals collected by each electrode array), and calculates characteristic parameters based on the collected electrocardiogram scanning signals;

[0045] 3. The ECG scanning unit selects the most suitable electrode array channel in the first electrode array according to the calculated characteristic parameters;

[0046] 4. The ECG scanning unit controls the second multiplexer to switch the three second electrode array channels (i.e. Figure 2 negative electrode array in );

[0047] 5. The electrocardiogram measurement unit obtains the electrocardiogram scanning signals collected by each negative electrode array, and calculates characteristic parameters according to the collected electrocardiogram scanning signals;

[0048] 6. The ECG scanning unit selects the most suitable channel in the second electrode array according to the characteristic parameters, and finally starts the ECG monitoring mode through the positive electrode array and the negative electrode array obtained by the screening.

[0049] This embodiment automatically collects high-quality electrocardiogram signals for monitoring through the selected electrode array leads, and can monitor electrocardiogram signals in a comfortable and non-sensitive manner at any time.

[0050] In one embodiment, in the ECG acquisition system provided by the embodiment of the present application, the processor performs the following operations for each ECG pre-scan signal before comparing the characteristic parameters of the ECG pre-scan signals acquired by different electrode arrays:

[0051] Determine the number of data points to be collected within the time window for acquiring the ECG pre-scan signal according to the sampling frequency and time window of the ECG pre-scan signal;

[0052] Based on the amplitude and phase of the ECG pre-scan signal and the number of the collected data points, the energy value of the ECG pre-scan signal in different preset frequency ranges is determined, so as to use the energy value as a characteristic parameter of the ECG pre-scan signal.

[0053] In one embodiment, in the ECG acquisition system provided by the embodiment of the present application, the amplitude and phase of the ECG pre-scan signal are determined based on the number of acquired data points and the fundamental frequency of the ECG pre-scan signal.

[0054] In one embodiment, in the ECG acquisition system provided by the embodiment of the present application, the calculation model for determining the energy value of the ECG pre-scan signal in different preset frequency ranges based on the amplitude and phase of the ECG pre-scan signal and the number of acquired data points is: Among them, kf 0 are the amplitude and phase of the ECG pre-scan signal, N is the number of the collected data points, CH(n) is the ECG pre-scan signal collected at the nth data point among the collected data points, e is a natural constant, j is the imaginary part of the complex number, and k is a positive integer.

[0055] Specifically, first, adjust the first multiplexer and the second multiplexer so that the negative electrode array channel is fixed to ch3-, and the positive electrode array channel is connected to ch1+, ch2+ and ch3+ in sequence. Start the electrocardiogram measurement unit in turn to collect the electrocardiogram signal for a period of time (such as 10 seconds), and obtain the electrocardiogram signals CH1[n], CH2[n] and CH3[n] respectively. Then, calculate the signal features in the electrocardiogram signal, which can be time domain features, frequency domain features or a linear combination of multiple features.

[0056] For CH1[n], CH2[n] and CH3[n], the main ECG energy intensity characteristics are calculated as F1, F2 and F3 respectively. The calculation formula is shown in Formula 1-7:

[0057]

[0058] Formula 1

[0059]

[0060] Formula 2

[0061]

[0062] Formula 3

[0063]

[0064] Formula 4

[0065]

[0066] Formula 5

[0067]

[0068] Formula 6

[0069]

[0070] Formula 7

[0071] Where sprate is the sampling frequency, f 0 is the lowest frequency that can be analyzed in a 10-second time window, DF1(kf 0 )、DF2(kf 0 ) and DF3(kf 0 ) are the coefficients (including amplitude and phase) corresponding to the k-fold lowest frequency in the ECG signals of the three positive electrode channels. F1, F2 and F3 are characteristic parameters corresponding to the ECG energy. N represents the number of all data points collected by CH1[n], CH2[n] and CH3[n] within 10 seconds.

[0072] In this embodiment, the electrode array of the lead is screened out through the electrode array screening method, and the user's electrocardiogram signal is accurately and imperceptibly monitored through the screened electrode array.

[0073] Please refer to Figure 2 In one embodiment, in the ECG acquisition system provided by the embodiment of the present application, determining the energy value of the ECG pre-scan signal in different preset frequency ranges includes:

[0074] Determining time domain parameters and frequency domain parameters of the ECG pre-scan signal within different preset frequency ranges;

[0075] Based on the time domain parameters and the frequency domain parameters, energy values ​​of the ECG pre-scan signal in different preset frequency ranges are determined.

[0076] In one embodiment, in the ECG acquisition system provided by the embodiment of the present application, the multiple electrode arrays include multiple positive electrode arrays and multiple negative electrode arrays;

[0077] The step of comparing the characteristic parameters of the ECG pre-scanning signals collected by different electrode arrays to select a target electrode array from the plurality of electrode arrays according to the comparison result includes:

[0078] Comparing characteristic parameters of the ECG pre-scanning signals collected by each of the positive electrode arrays, and determining the positive electrode array with the largest characteristic parameter among the plurality of positive electrode arrays as the target positive electrode array according to the comparison result;

[0079] Comparing characteristic parameters of the ECG pre-scanning signals collected by each of the negative electrode arrays, and determining the negative electrode array with the largest characteristic parameter among the multiple negative electrode arrays as the target negative electrode array according to the comparison result;

[0080] A combination of the target positive electrode array and the target negative electrode array is used as the target electrode array.

[0081] Specifically, the ECG scanning unit selects the most suitable electrode channel in the positive electrode array according to the collected characteristic parameters. Preferably, the ECG scanning unit selects the electrode array corresponding to the maximum characteristic value in the three-channel ECG characteristics of the positive electrode array as the preferred electrode channel in the positive electrode array. Taking the embodiment as an example, if F1>F2>F3 in the three-channel signal characteristics of 10 seconds, then ch1+ is selected as the most suitable ECG signal positive channel.

[0082] The screening process of the negative electrode is as follows:

[0083] The ECG scanning unit controls the second multiplexer to switch the negative electrode array channels in sequence. Preferably, after confirming the positive electrode channel, ch1-, ch2- and ch3- are connected in sequence. The ECG measurement unit collects fixed time window constant data (ECG pre-scan signal) and calculates characteristic parameters based on the collected ECG pre-scan signal. Preferably, the ECG measurement unit is started in sequence to collect for 10 seconds to obtain ECG signals CH4[n], CH5[n] and CH6[n].

[0084] Next, the signal features in the electrocardiogram are calculated, and the electrocardiogram signal features can be time domain features, frequency domain features, or a linear combination of multiple features. Preferably, for CH4[n], CH5[n], and CH6[n], the electrocardiogram main energy intensity features are calculated as F4, F5, and F6, respectively, and the calculation formulas are the same as the above formulas 1-7, except that F1 in formulas 1 and 5 is replaced by F4, F2 in formulas 2 and 6 is replaced by F5, and F3 in formulas 3 and 7 is replaced by F6.

[0085] The ECG scanning unit selects the most suitable channel in the negative electrode array according to the characteristic parameters. The monitoring mode is turned on. Preferably, the ECG scanning unit selects the electrode array corresponding to the largest feature in the three-channel ECG feature of the negative electrode array as the preferred negative channel in the negative second electrode array. Taking the embodiment as an example, in the 10-second three-channel signal feature, if F6>F4>F5, then ch3- is selected as the most suitable ECG signal negative channel.

[0086] Finally, ECG monitoring is started through the screened positive electrode array and negative electrode array.

[0087] This embodiment automatically collects high-quality electrocardiogram signals for monitoring through the selected electrode array leads, and can monitor electrocardiogram signals in a comfortable and non-sensitive manner at any time.

[0088] In one embodiment, in the ECG acquisition system provided by the embodiment of the present application, before comparing the characteristic parameters of the ECG pre-scan signals acquired by different electrode arrays, the ECG scanning unit is also used to control each electrode array to independently acquire the ECG pre-scan signals of a preset duration.

[0089] Specifically, Figure 1 As shown, when screening the positive electrode array, the ECG scanning unit is also used to control each electrode array to independently collect ECG pre-scanning signals of a preset duration.

[0090] In this embodiment, the ECG scanning unit controls each electrode array to collect ECG scanning signals for a certain period of time.

[0091] Please refer to Figure 2 The present invention provides an electrocardiogram acquisition method, comprising:

[0092] Step 100, obtaining the ECG pre-scanning signals collected by each electrode array;

[0093] Step 200, comparing characteristic parameters of the ECG pre-scanning signals collected by the electrode arrays, and selecting a target electrode array from the electrode arrays according to the comparison result;

[0094] Step 300: collecting ECG signals through the target electrode array.

[0095] The ECG acquisition device provided by the present invention is described below. The ECG acquisition device described below and the ECG acquisition method described above can be referenced to each other.

[0096] Specifically, the ECG acquisition method provided in this application includes the following steps:

[0097] Step 1: The ECG scanning unit controls the first multiplexer to switch the channels of each positive electrode array in sequence; Step 2: The electrocardiogram measurement unit collects data of a fixed time window length (ECG scanning) and calculates characteristic parameters; Step 3: The ECG scanning unit selects the most suitable channel in each positive electrode array according to the characteristic parameters. Step 4: The ECG scanning unit controls the second multiplexer to switch the channels of each negative electrode array in sequence; Step 5: The electrocardiogram measurement unit collects data of a fixed time window length (ECG scanning) and calculates characteristic parameters; Step 6: The ECG scanning unit selects the most suitable channel in each negative electrode array according to the characteristic parameters. The monitoring mode is started with the positive and negative electrode arrays obtained through the screening.

[0098] The electrode array may be an electrode made of flexible fabric; the first multiplexer and the second multiplexer are integrated into a microprocessor; the time range of the "fixed time" may be 0.5 to 60 seconds; the characteristic parameters may be the standard deviation, percentile and mean of the time domain and frequency domain parameters in the ECG signal segment.

[0099] This embodiment automatically collects high-quality electrocardiogram signals for monitoring through the selected electrode array leads, and can monitor electrocardiogram signals in a comfortable and non-sensitive manner at any time.

[0100] Please refer to Figure 3 The present invention also provides an electrocardiogram acquisition device, comprising:

[0101] The ECG pre-scan signal acquisition module 301 is used to acquire the ECG pre-scan signals collected by each electrode array;

[0102] The electrode array selection module 302 is used to compare the characteristic parameters of the ECG pre-scanning signals collected by the electrode arrays, so as to select a target electrode array from the electrode arrays according to the comparison result;

[0103] The ECG signal acquisition module 303 is used to acquire ECG signals through the target electrode array.

[0104] Figure 4 An example of a physical structure diagram of an electronic device is shown in FIG. Figure 4 As shown, the electronic device may include: a processor 410, a communication interface 420, a memory 430 and a communication bus 440, wherein the processor 410, the communication interface 420 and the memory 430 communicate with each other through the communication bus 440. The processor 410 may call the logic instructions in the memory 430 to execute the electrocardiogram acquisition method.

[0105] In addition, the logic instructions in the above-mentioned memory 430 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when it is sold or used as an independent product. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

[0106] On the other hand, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which is implemented when the computer program is executed by a processor to execute the electrocardiogram acquisition method provided by the above methods.

[0107] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0108] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0109] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An electrocardiogram acquisition system, characterized in that: include: multiple electrode arrays; A processor, configured to compare characteristic parameters of electrocardiogram pre-scanning signals acquired by different electrode arrays, so as to select a target electrode array from the plurality of electrode arrays according to the comparison result; The ECG scanning unit is used to control the target electrode array to collect ECG signals.

2. The ECG acquisition system according to claim 1, characterized in that: Before comparing the characteristic parameters of the ECG pre-scanning signals acquired by different electrode arrays, the processor performs the following operations for each of the ECG pre-scanning signals: Determine the number of data points to be collected within the time window for acquiring the ECG pre-scan signal according to the sampling frequency and time window of the ECG pre-scan signal; Based on the amplitude and phase of the ECG pre-scan signal and the number of the collected data points, the energy value of the ECG pre-scan signal in different preset frequency ranges is determined, so as to use the energy value as a characteristic parameter of the ECG pre-scan signal.

3. The ECG acquisition system according to claim 2, characterized in that: The amplitude and phase of the ECG pre-scan signal are determined based on the number of the acquired data points and the fundamental frequency of the ECG pre-scan signal.

4. The ECG acquisition system according to claim 2, characterized in that: The calculation model for determining the energy value of the ECG pre-scan signal in different preset frequency ranges based on the amplitude and phase of the ECG pre-scan signal and the number of the collected data points is: Wherein, kf0 is the amplitude and phase of the ECG pre-scan signal, N is the number of the collected data points, CH(n) is the ECG pre-scan signal collected at the nth data point among the collected data points, e is a natural constant, j is the imaginary part of a complex number, and k is a positive integer.

5. The ECG acquisition system according to claim 2, characterized in that: Determining the energy value of the ECG pre-scan signal in different preset frequency ranges includes: Determining time domain parameters and frequency domain parameters of the ECG pre-scan signal within different preset frequency ranges; Based on the time domain parameters and the frequency domain parameters, energy values ​​of the ECG pre-scan signal in different preset frequency ranges are determined.

6. The ECG acquisition system according to claim 1, characterized in that: The plurality of electrode arrays include a plurality of positive electrode arrays and a plurality of negative electrode arrays; The step of comparing the characteristic parameters of the ECG pre-scanning signals collected by different electrode arrays to select a target electrode array from the plurality of electrode arrays according to the comparison result includes: Comparing characteristic parameters of the ECG pre-scanning signals collected by each of the positive electrode arrays, and determining the positive electrode array with the largest characteristic parameter among the plurality of positive electrode arrays as the target positive electrode array according to the comparison result; Comparing characteristic parameters of the ECG pre-scanning signals collected by each of the negative electrode arrays, and determining the negative electrode array with the largest characteristic parameter among the multiple negative electrode arrays as the target negative electrode array according to the comparison result; A combination of the target positive electrode array and the target negative electrode array is used as the target electrode array.

7. The ECG acquisition system according to claim 1, characterized in that: Before comparing the characteristic parameters of the ECG pre-scan signals acquired by different electrode arrays, the ECG scanning unit is further used to control each electrode array to independently acquire the ECG pre-scan signals of a preset duration.

8. A method for collecting electrocardiograms, characterized in that: The electrocardiogram acquisition system used in any one of claims 1 to 7 comprises: Acquire the ECG pre-scanning signals collected by each electrode array; Comparing characteristic parameters of the ECG pre-scanning signals collected by the electrode arrays to select a target electrode array from the electrode arrays according to the comparison result; The electrocardiogram (ECG) signals are collected through the target electrode array.

9. A wearable device, characterized in that: The invention comprises the electrocardiogram acquisition system as claimed in any one of claims 1 to 7.

10. The wearable device according to claim 9, characterized in that: The wearable device is an ECG collection belt, an ECG patch or an ECG clothing.

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