ECG electrode position correction method and system

Abstract

The present invention discloses a method and system for correcting the position of an electrocardiogram (ECG) electrode, which relates to the field of ECG signal acquisition technology. The method comprises the following steps: obtaining an original ECG collected by a glove acquisition front end; preprocessing the original ECG and locating the PQRST band based on the preprocessed original ECG to obtain the P wave, Q wave, R wave, S wave, and T wave corresponding to the target lead ECG signal; the target lead ECG signal is a II lead ECG signal, a V1 lead ECG signal, a V3 lead ECG signal, and a V4 lead ECG signal; determining the measurement position of the glove acquisition front end based on the amplitude changes of the P wave, Q wave, R wave, S wave, and T wave corresponding to the target lead ECG signal; and correcting the measurement position of the glove acquisition front end when the measurement position of the glove acquisition front end is not in the standard position. The present invention can reduce the risk of ECG signal waveform changes caused by incorrect ECG electrode placement.

Description

Technical Field

[0001] The present invention relates to the technical field of electrocardiogram (ECG) signal acquisition, and in particular to an ECG electrode position correction method and system. Background Art

[0002] With the widespread use of electrocardiograms, accurate placement of ECG electrodes is the basis of ECG examination. Only by accurately placing ECG electrodes can standard ECG signals be collected, reducing the doctor's misdiagnosis rate of diseases.

[0003] ECG signal correction involves correcting the ECG electrode position before signal acquisition and processing the ECG signal after acquisition. The latter, based on morphological methods, filters out clutter from the ECG signal, such as baseline drift, power frequency interference, and myoelectric interference, but does not alter the original ECG signal information, such as amplitude, phase, and wave-to-wave relationships. Therefore, post-acquisition ECG signal processing cannot be considered a true correction solution. The former employs an electrode array approach, arranging multiple ECG electrodes according to a specific pattern at the edge of the target location. The combination of each ECG electrode and the other electrodes is continuously tested to determine the arrangement that best matches the standard ECG signal and is ultimately selected. While the electrode array approach can alter the original ECG signal information, it is extremely inefficient and computationally complex. Summary of the Invention

[0004] The purpose of the present invention is to provide an ECG electrode position correction method and system, which can reduce the risk of ECG signal waveform changes caused by incorrect ECG electrode placement.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] The present invention provides a method for correcting the position of an electrocardiogram electrode, comprising:

[0007] Acquire an original electrocardiogram collected by the glove acquisition front end; the original electrocardiogram includes 12-lead electrocardiogram signals; each lead electrocardiogram signal includes multiple complete electrocardiogram signal cycles; the glove acquisition front end includes a glove and multiple electrocardiogram electrodes disposed on the outer side of the palm of the glove;

[0008] Preprocessing the original electrocardiogram, and locating the PQRST band according to the preprocessed original electrocardiogram to obtain the P wave, Q wave, R wave, S wave, and T wave corresponding to the target lead electrocardiogram signal; the target lead electrocardiogram signal is the II lead electrocardiogram signal, the V1 lead electrocardiogram signal, the V3 lead electrocardiogram signal, and the V4 lead electrocardiogram signal;

[0009] The measurement position of the glove acquisition front end is determined according to the amplitude changes of the P wave, Q wave, R wave, S wave and T wave corresponding to the target lead ECG signal, and when the measurement position of the glove acquisition front end is not in the standard position, the measurement position of the glove acquisition front end is corrected.

[0010] Optionally, preprocessing the original electrocardiogram specifically includes:

[0011] A 0.3 Hz high-pass filter was used to filter out the baseline drift in the original electrocardiogram, a 50 Hz notch filter was used to filter out the power frequency interference in the original electrocardiogram, and a 50 Hz low-pass filter was used to filter out the myoelectric interference in the original electrocardiogram to obtain the preprocessed original electrocardiogram.

[0012] Optionally, positioning the PQRST band according to the preprocessed original electrocardiogram includes:

[0013] Determine the R wave in each ECG signal cycle in each lead ECG signal according to the adaptive threshold method and the linear table;

[0014] According to the time proportion of each band of P wave, Q wave, S wave and T wave, the P wave, Q wave, S wave and T wave in each ECG signal cycle of each lead ECG signal are determined based on the position of R wave.

[0015] Optionally, determining the measurement position of the glove acquisition front end according to the amplitude changes of the P wave, Q wave, R wave, S wave, and T wave corresponding to the target lead ECG signal specifically includes:

[0016] According to the amplitude changes of the P wave, Q wave, R wave, S wave and T wave corresponding to the target lead ECG signal, the ratios of different bands are determined to obtain the first type of feature results and the second type of feature results;

[0017] According to the first-category feature results and the second-category feature results, the measurement position of the glove collection front end is determined.

[0018] Optionally, the process of determining the first type of feature result is:

[0019] If the ratios of T wave / Q wave, S wave / Q wave, and R wave / Q wave in the ECG signal of lead II all increase, it indicates that the ECG signal of lead II is shifted upward. If the ratios of T wave / Q wave, S wave / Q wave, and R wave / Q wave in the ECG signal of lead II all decrease, it indicates that the ECG signal of lead II is shifted downward.

[0020] If the ratio of the P wave / S wave in the V1 lead ECG signal increases, it indicates that the V1 lead ECG signal is shifted to the left. If the ratio of the P wave / S wave in the V1 lead ECG signal decreases, it indicates that the V1 lead ECG signal is shifted to the right.

[0021] If the R wave / S wave ratio in the V3 lead ECG signal increases, it indicates that the V3 lead ECG signal is shifted upward, and if the R wave / S wave ratio in the V3 lead ECG signal decreases, it indicates that the V3 lead ECG signal is shifted downward;

[0022] If the T wave / Q wave and S wave / Q wave ratios in the V4 lead ECG signal increase, it indicates that the V3 lead ECG signal is shifted upward. If the T wave / Q wave and S wave / Q wave ratios in the V4 lead ECG signal decrease, it indicates that the V4 lead ECG signal is shifted downward.

[0023] Optionally, the second type of feature result determination process is:

[0024] If the ratio of the P wave / Q wave in the V1 lead ECG signal decreases, the ratio of the R wave / P wave increases, the ratio of the T wave / Q wave decreases, and the ratio of the R wave / T wave increases, it indicates that the V1 lead ECG signal is shifted upward; otherwise, the V1 lead ECG signal is shifted downward.

[0025] If the ratio of R wave / P wave in the V3 lead ECG signal increases, it indicates that the V3 lead ECG signal is shifted to the left, otherwise the V3 lead ECG signal is shifted to the right;

[0026] If the ratio of R wave / Q wave in the V4 lead ECG signal decreases, it indicates that the V4 lead ECG signal is shifted downward, otherwise the V4 lead ECG signal is shifted upward;

[0027] If the R wave / S wave ratio and the R wave / T wave ratio in the V4 lead ECG signal increase, it indicates that the V4 lead ECG signal is shifted to the left; otherwise, the V4 lead ECG signal is shifted to the right.

[0028] Optionally, the second type of feature results are auxiliary to the first type of feature results.

[0029] The present invention also provides an electrocardiogram electrode position correction system, comprising:

[0030] The original ECG acquisition module is used to acquire the original ECG collected by the glove acquisition front end; the original ECG includes 12-lead ECG signals; each lead ECG signal includes multiple complete ECG signal cycles; the glove acquisition front end includes a glove and multiple ECG electrodes arranged on the outer side of the palm of the glove;

[0031] a band positioning module for preprocessing the original electrocardiogram and positioning the PQRST bands based on the preprocessed original electrocardiogram to obtain the P wave, Q wave, R wave, S wave, and T wave corresponding to the target lead electrocardiogram signal; the target lead electrocardiogram signal is the II lead electrocardiogram signal, the V1 lead electrocardiogram signal, the V3 lead electrocardiogram signal, and the V4 lead electrocardiogram signal;

[0032] The measurement position determination and correction module is used to determine the measurement position of the glove acquisition front end according to the amplitude changes of the P wave, Q wave, R wave, S wave and T wave corresponding to the target lead ECG signal, and to correct the measurement position of the glove acquisition front end when the measurement position of the glove acquisition front end is not in the standard position.

[0033] According to the specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0034] The present invention only needs to calculate the waveform signal information between each lead to determine whether the acquisition device (ie, the ECG electrode) is placed incorrectly, thereby achieving the effect of measuring position correction. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. 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 any creative work.

[0036] Figure 1 A schematic structural diagram of an ECG electrode position correction device provided by an embodiment of the present invention;

[0037] Figure 2 A schematic flow chart of a method for correcting ECG electrode position provided by an embodiment of the present invention;

[0038] Figure 3 A schematic diagram of an electrocardiogram signal cycle provided by an embodiment of the present invention;

[0039] Figure 4 Schematic diagram of the measurement position of the glove collection front end provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0041] The purpose of the present invention is to provide an ECG electrode position correction method and system, which can reduce the risk of ECG signal waveform changes caused by incorrect ECG electrode placement, thereby reducing doctors' misjudgment.

[0042] 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.

[0043] Example 1

[0044] The present embodiment provides an ECG electrode position correction device comprising a glove acquisition front end, an ECG acquisition module, a main control module, a communication module, a power management module and a host computer; the glove acquisition front end contacts the human body, the ECG acquisition module is responsible for acquiring the human ECG signal, and amplifies and filters the human ECG signal and transmits it to the main control module, the main control module pre-processes the amplified and filtered ECG signal, and identifies whether the measurement position of the ECG electrode is normal through the ECG electrode position correction method described in Example 2, and transmits the pre-processed ECG signal and the recognition result to the communication module, which then transmits it to the host computer wirelessly, the host computer displays the ECG waveform (i.e., the pre-processed ECG signal) and the recognition result, and when the measurement position of the ECG electrode is abnormal, the host computer will automatically issue an alarm to alert the patient and doctor, and assist in correcting the measurement position of the ECG electrode, such as Figure 1 shown.

[0045] In this embodiment, the power management module is responsible for supplying power to the entire device.

[0046] In this embodiment, there are 10 ECG electrodes on the front end of the glove, which transmit the ECG signals of the human body to the ECG acquisition module after contacting the human body.

[0047] In this embodiment, the communication module transmits data to the host computer using WIFI, 4G or Bluetooth.

[0048] In this embodiment, the host computer includes but is not limited to a computer APP, a mobile phone APP, a tablet APP, or a WeChat applet.

[0049] Example 2

[0050] like Figure 2 As shown, this embodiment provides a method for correcting the position of an ECG electrode, comprising:

[0051] Step 100: Obtaining an original electrocardiogram collected by the glove acquisition front end; the original electrocardiogram includes 12-lead electrocardiogram signals; each lead electrocardiogram signal includes multiple complete electrocardiogram signal cycles; the glove acquisition front end includes a glove and multiple electrocardiogram electrodes arranged on the outer side of the palm of the glove.

[0052] Step 200: Preprocess the original electrocardiogram, and locate the PQRST band based on the preprocessed original electrocardiogram to obtain the P wave, Q wave, R wave, S wave and T wave corresponding to the target lead electrocardiogram signal; the target lead electrocardiogram signal is the II lead electrocardiogram signal, the V1 lead electrocardiogram signal, the V3 lead electrocardiogram signal and the V4 lead electrocardiogram signal.

[0053] Step 300: Determine the measurement position of the glove acquisition front end based on the amplitude changes of the P wave, Q wave, R wave, S wave, and T wave corresponding to the target lead ECG signal, and correct the measurement position of the glove acquisition front end if it is not at the standard position.

[0054] In this embodiment, the original electrocardiogram has a total of twelve leads, including six limb leads and six chest leads. The limb leads include three standard limb leads I, II, and III and three pressurized limb leads aVR, aVL, and aVF. The chest leads include six leads V1, V2, V3, V4, V5, and V6.

[0055] The glove collection front end is the portable 12-lead ECG signal acquisition device in the patent application document with application number "202010045305.X" and name "Portable 12-lead ECG signal acquisition device and its use method", which will not be described in detail here.

[0056] The human body's ECG signals are generated by the depolarization and repolarization of cells. Due to the different locations where ECG signals are measured, the collected ECG signals are inconsistent. The ECG signal strength is directly proportional to the number of myocardial cells (myocardial thickness), meaning the thicker the myocardium, the higher the potential intensity and the larger the ECG waveform. The ECG electrode position is inversely proportional to the distance between myocardial cells, meaning the greater the distance, the lower the potential intensity and the smaller the ECG waveform. The angle formed by the ECG electrode orientation and the direction of myocardial depolarization is inversely proportional, meaning the larger the angle, the smaller the potential intensity and the smaller the ECG waveform.

[0057] The glove's front end determines the ECG electrode positions according to a specific distribution based on the frontal and transverse planes of standard leads. Analysis of the principles of ECG signal generation reveals that certain patterns must exist between the 12-lead ECG signals. To reduce the likelihood of physician misdiagnosis due to variations in the glove's front end measurement position, a method for correcting ECG electrodes has been proposed. This algorithm calculates the optimal measurement position for the glove's front end and prompts the user to correct the error by repositioning the glove's front end.

[0058] To investigate the correlation between different measurement positions and ECG signal variations, the glove's front end was used to collect ECG signals at various measurement locations at a sampling rate of 500Hz. To improve the algorithm's universality, subjects included those with varying body types, including thin, average-sized, and overweight. All subjects were uniformly positioned supine. ECG signals were first measured at a standard position, with the RA as the reference position. The glove's front end was then offset by 4cm in the following directions: upward, downward, left, right, upper left, lower right, upper right, and lower left. The collected ECG signals should contain multiple complete ECG signal cycles.

[0059] RA is the name of the reference electrode. Here, RA is the reference point during the movement of the glove acquisition front end. While maintaining the relative position of each ECG electrode, the movement of RA represents the movement position of the entire glove acquisition front end.

[0060] In order to obtain clear ECG signals and facilitate observation of ECG signal changes at different measurement locations, the collected original ECG needs to be preprocessed. The specific operations are as follows:

[0061] A 0.3 Hz high-pass filter was used to filter out the baseline drift in the original electrocardiogram, a 50 Hz notch filter was used to filter out the power frequency interference in the original electrocardiogram, and a 50 Hz low-pass filter was used to filter out the myoelectric interference in the original electrocardiogram.

[0062] In this embodiment, positioning the PQRST band according to the pre-processed original electrocardiogram specifically includes:

[0063] First, the R wave in each ECG cycle of each lead is determined using the adaptive threshold method and a linear table. Second, the P wave, Q wave, S wave, and T wave in each ECG cycle of each lead are determined based on the time proportion of their respective bands and the R wave position.

[0064] An example is: Figure 3 As shown, since the R wave feature in the ECG signal cycle is more prominent, according to the adaptive threshold method, a linear table with a capacity of 50 is first set, and the ECG signal of each lead is passed through, and the maximum and minimum values ​​in the linear table are found in real time. At regular intervals, the threshold is re-updated proportionally according to the maximum and minimum values. At the same time, a real-time comparison is made to see if the middle value in the linear table is larger than both the left and right sides. If it meets the requirements, it is compared with the threshold to see if it is also larger than the threshold. If it also meets the requirements, the R peak is found.

[0065] Based on the time proportions of the P wave, Q wave, S wave, and T wave bands, and taking the R wave position as the benchmark, here we take the positioning of the Q wave as an example. The QRS wave duration is 0.06 to 0.1s, the PR interval duration is 0.12 to 0.2s, and the end of the PR interval is the starting position of the Q wave. In order to set the window length to reasonably locate the Q wave, the time window is set to 0.05s. At this time, the sampling rate of the glove acquisition front end is 500Hz, and its window size is: W1 = Q(t)*Fs.

[0066] Using the R wave as the end point of the window, we intercept the length W1 forward and find the maximum absolute value within this window to locate the Q wave. Similarly, we can find the specific positions of the other wavebands, accurately locating each waveband within a range of at least five complete ECG signal cycles. Q(t) is the length of the time window for intercepting the Q wave.

[0067] To locate the P wave, take the Q wave as the reference point. The end of the PR interval is the starting position of the Q wave. The time occupied by the PR interval is 0.12 to 0.2s, so the time window length P(t) of P is set to 0.25s. At this time, the window length is W2 = P(t) * Fs. You only need to find the maximum absolute value of the signal amplitude within the length of W2, which is the position of the P wave.

[0068] To locate the S wave, take the R wave as the reference position and cut a window length backward. Since the QRS complex takes up 0.06 to 0.1 seconds, the time window length S(t) is set to 0.1 seconds. At this time, the window length is W3 = S(t) * Fs. Calculate the maximum absolute value of the signal waveform within this window time to find the S wave.

[0069] Locate the T wave, taking the S wave as the reference point. Since the QT interval is 0.44s, the time window T(t) of the T wave is set to 0.4s. At this time, the window length is W4=T(t)*Fs. The maximum absolute value within this window can be used to find the corresponding T wave band.

[0070] In this embodiment, different measurement positions are divided into standard position, left offset position, right offset position, upper offset position, lower offset position, upper left offset position, lower right offset position, upper right offset position, and lower left corner position. For the ECG signals at different measurement positions, each measurement position is observed separately. Due to the different measurement positions, the changes of the ECG signals are also different. Figure 4 shown.

[0071] After locating each band, observe how the amplitude of each band changes with different measurement locations. To make the feature more obvious, try to select the ratio of bands with opposite changes. This result is equivalent to amplifying the feature of non-standard position changes, which is defined as a first-class feature. If it does not specifically meet this feature, such as one wave changing in opposite directions and the other changing in the same direction, it is classified as a second-class feature. In this case, the corresponding ratio can also be selected to eliminate the possibility of certain directions. However, the credibility of this feature is not as good as the first-class case.

[0072] In this embodiment, the measurement position of the glove acquisition front end is determined based on the amplitude changes of the P wave, Q wave, R wave, S wave, and T wave corresponding to the target lead ECG signal, specifically including:

[0073] First, according to the amplitude changes of the P wave, Q wave, R wave, S wave and T wave corresponding to the target lead ECG signal, the ratio of different bands is determined to obtain the first and second type feature results; secondly, based on the first and second type feature results, the measurement position of the glove acquisition front end is determined.

[0074] The first type of feature result determination process:

[0075] It was observed that when the ECG signal in lead II deviated upward, the R wave, S wave, and T wave increased, and the Q wave decreased. When the ECG signal in lead II deviated downward, the R wave, S wave, and T wave decreased, and the Q wave increased. It was concluded that if the ratios of T wave / Q wave, S wave / Q wave, and R wave / Q wave increased, it indicated that the ECG signal in lead II deviated upward. If these three ratios decreased, it indicated that the ECG signal in lead II deviated downward.

[0076] When the V1 lead ECG signal shifts to the left, the P wave increases and the S wave decreases. When the V1 lead ECG signal shifts to the right, the P wave decreases and the S wave increases. It can be concluded that if the P wave / S wave ratio increases, it indicates that the V1 lead ECG signal shifts to the left, otherwise it indicates that the V1 lead ECG signal shifts to the right.

[0077] When the V3 lead ECG signal shifts upward, the R wave decreases and the S wave increases. When the V3 lead ECG signal shifts downward, the R wave increases and the S wave decreases. It can be concluded that if the R wave / S wave ratio decreases, it indicates that the V3 lead ECG signal shifts upward, otherwise it indicates that the V3 lead ECG signal shifts downward.

[0078] When the V4 lead ECG signal shifts upward, the Q wave decreases, and the S wave and T wave increase. When the V4 lead ECG signal shifts downward, the Q wave increases, and the S wave and T wave decrease. It can be concluded that if the T wave / Q wave and S wave / Q wave ratios both increase, it indicates that the V4 lead ECG signal shifts upward; otherwise, the V4 lead ECG signal shifts downward.

[0079] Set 4 variables in 4 different directions, namely L, R, N, and S, representing left, right, up, and down. For changes in the above positions, increase the variable value that meets the change characteristics described. The increase value is set to 2 here. If T / Q increases at this time, the corresponding N value is increased by 2.

[0080] The second type of feature result determination process:

[0081] It was observed that when the V1 lead ECG signal deviated upward, the P wave and T wave values ​​decreased, and the Q wave and R wave values ​​increased. When the V1 lead ECG signal deviated downward, the P wave and T wave decreased, and the Q wave and R wave decreased. The conclusion was drawn: if the P wave / Q wave ratio decreased, the R wave / P wave ratio increased, the T wave / Q wave ratio decreased, and the R wave / T wave ratio increased, it indicates that the V1 lead ECG signal is more likely to deviate upward than downward. Otherwise, the V1 lead ECG signal may deviate downward.

[0082] When the V3 lead ECG signal shifts to the left, the R wave increases and the P wave decreases. When the V3 lead ECG signal shifts to the right, the R wave decreases and the P wave decreases. It can be concluded that if the R wave / P wave ratio increases, it indicates that the possibility of the V3 lead ECG signal shifting to the left is greater than that of the V3 lead ECG signal shifting to the right. Otherwise, the V3 lead ECG signal may shift to the right.

[0083] When the V4 lead ECG signal shifts upward, the R wave decreases and the Q wave decreases. When the V4 lead ECG signal shifts downward, the R wave decreases and the Q wave increases. When the V4 lead ECG signal shifts to the left, the R wave increases, the S wave decreases, and the T wave decreases. When the V4 lead ECG signal shifts to the right, the R wave decreases, the S wave decreases, and the T wave decreases. The conclusion is: if the R wave / Q wave ratio decreases, it indicates that the V4 lead ECG signal is more likely to shift downward than upward, otherwise the V4 lead ECG signal may be shifted upward. If the R wave / S wave ratio increases and the R wave / T wave ratio increases, it indicates that the V4 lead ECG signal is more likely to shift to the left than to the right, otherwise the V4 lead ECG signal may be shifted to the right.

[0084] At this time, since the second type of features are easily affected by the detection, the degree of change of the values ​​of the four variables here is reduced, that is, every time there is a change, the threshold of the corresponding possible direction is increased by 1.

[0085] When determining whether the first and second thresholds meet the waveform ratio requirements for a specific offset direction, a threshold is required to eliminate the influence of other leads and noise. This threshold setting, when processing experimental data, yields the amplitudes of the PQRST band at standard positions for different individuals. Based on these characteristics, the characteristic ratio corresponding to each individual is calculated, a normal distribution plot is plotted, and the 2σ value is used as the threshold for the corresponding characteristic. For example, if the calculated waveform ratio is less than the set threshold, the corresponding directional variable is subtracted based on the above analysis results. If the calculated waveform ratio exceeds the set threshold, the corresponding directional variable is added based on the above analysis results.

[0086] The recognition results are analyzed. Since this embodiment uses two types of features for judgment, namely, first- and second-type feature results, with the second-type feature results supplementing the first-type feature results, if the second-type feature results are consistent, the values ​​of the four directional variables are added together. The final result values ​​for the four directions, L, R, N, and S, are calculated, and the thresholds for the two largest directions among the four directional variables are calculated. For example, if the L and N result values ​​are the largest, and L>N, then the measurement position of the glove acquisition front end is determined to be offset to the left, then upward, and then to the upper left. If the two maximum values ​​appear in opposite directions, such as L and R, then the judgment is incorrect and the measurement is repeated. The recognition results are transmitted to the communication module, which then transmits the recognition results to the host computer. By displaying the waveform signal collected at this time and the recognition results, the measurement position of the glove acquisition front end is corrected, making the acquired signal more standardized and reducing the doctor's misjudgment rate.

[0087] Example 3

[0088] In order to execute the method corresponding to the above-mentioned embodiment 1 and achieve the corresponding functions and technical effects, an ECG electrode position correction system is provided below.

[0089] This embodiment provides an electrocardiogram electrode position correction system, comprising:

[0090] The original ECG acquisition module is used to acquire the original ECG collected by the glove acquisition front end; the original ECG includes 12-lead ECG signals; each lead ECG signal includes multiple complete ECG signal cycles; the glove acquisition front end includes a glove and multiple ECG electrodes arranged on the outer side of the palm of the glove.

[0091] The band positioning module is used to preprocess the original electrocardiogram and locate the PQRST band according to the preprocessed original electrocardiogram to obtain the P wave, Q wave, R wave, S wave and T wave corresponding to the target lead electrocardiogram signal; the target lead electrocardiogram signal is the II lead electrocardiogram signal, the V1 lead electrocardiogram signal, the V3 lead electrocardiogram signal and the V4 lead electrocardiogram signal.

[0092] The measurement position determination and correction module is used to determine the measurement position of the glove acquisition front end according to the amplitude changes of the P wave, Q wave, R wave, S wave and T wave corresponding to the target lead ECG signal, and to correct the measurement position of the glove acquisition front end when the measurement position of the glove acquisition front end is not in the standard position.

[0093] Determining whether the measurement position of the front end of the glove collection device is standard has not been explored. Most portable devices are only single-lead, so there is no question of whether it is standard or not; the placement position can be approximate. However, 12 leads are the most standard measurement method in clinical medicine. Patent CN 111134657A discloses a portable 12-lead ECG signal collection device that is operated by a standard stranger, but there is still a problem of non-standard measurement position. The method of the present invention can solve the problem of collection errors caused by non-standard measurement position.

[0094] Moreover, the present invention has small engineering calculation amount, convenient embedding, rapid response, and can judge the current measuring position of the glove through continuous prompts, thereby assisting the user to operate the device more standardly, thus expanding the popularity of the device to a certain extent and extending its scope of use.

[0095] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0096] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A method for correcting the position of an electrocardiogram electrode, characterized in that: include: Acquire an original electrocardiogram collected by the glove acquisition front end; the original electrocardiogram includes 12-lead electrocardiogram signals; each lead electrocardiogram signal includes multiple complete electrocardiogram signal cycles; the glove acquisition front end includes a glove and multiple electrocardiogram electrodes disposed on the outer side of the palm of the glove; Preprocessing the original electrocardiogram, and locating the PQRST band according to the preprocessed original electrocardiogram to obtain the P wave, Q wave, R wave, S wave, and T wave corresponding to the target lead electrocardiogram signal; the target lead electrocardiogram signal is the II lead electrocardiogram signal, the V1 lead electrocardiogram signal, the V3 lead electrocardiogram signal, and the V4 lead electrocardiogram signal; Determine the measurement position of the glove acquisition front end based on the amplitude changes of the P wave, Q wave, R wave, S wave, and T wave corresponding to the target lead ECG signal, and correct the measurement position of the glove acquisition front end if it is not in the standard position; The measurement position of the glove acquisition front end is determined based on the amplitude changes of the P wave, Q wave, R wave, S wave, and T wave corresponding to the target lead ECG signal, specifically including: Based on the amplitude changes of the P wave, Q wave, R wave, S wave, and T wave corresponding to the target lead ECG signal, the ratios of different bands are determined to obtain the first and second type feature results; based on the first and second type feature results, the measurement position of the glove acquisition front end is determined; The process of determining the first type of feature results is as follows: If the ratios of T wave / Q wave, S wave / Q wave, and R wave / Q wave in the ECG signal of lead II all increase, it indicates that the ECG signal of lead II is shifted upward. If the ratios of T wave / Q wave, S wave / Q wave, and R wave / Q wave in the ECG signal of lead II all decrease, it indicates that the ECG signal of lead II is shifted downward. If the ratio of the P wave / S wave in the V1 lead ECG signal increases, it indicates that the V1 lead ECG signal is shifted to the left. If the ratio of the P wave / S wave in the V1 lead ECG signal decreases, it indicates that the V1 lead ECG signal is shifted to the right. If the R wave / S wave ratio in the V3 lead ECG signal increases, it indicates that the V3 lead ECG signal is shifted upward, and if the R wave / S wave ratio in the V3 lead ECG signal decreases, it indicates that the V3 lead ECG signal is shifted downward; If the ratios of T wave / Q wave and S wave / Q wave in the V4 lead ECG signal increase, it indicates that the V3 lead ECG signal is shifted upward. If the ratios of T wave / Q wave and S wave / Q wave in the V4 lead ECG signal decrease, it indicates that the V4 lead ECG signal is shifted downward. The process of determining the second type of feature results is as follows: If the ratio of the P wave / Q wave in the V1 lead ECG signal decreases, the ratio of the R wave / P wave increases, the ratio of the T wave / Q wave decreases, and the ratio of the R wave / T wave increases, it indicates that the V1 lead ECG signal is shifted upward; otherwise, the V1 lead ECG signal is shifted downward. If the ratio of R wave / P wave in the V3 lead ECG signal increases, it indicates that the V3 lead ECG signal is shifted to the left, otherwise the V3 lead ECG signal is shifted to the right; If the ratio of R wave / Q wave in the V4 lead ECG signal decreases, it indicates that the V4 lead ECG signal is shifted downward, otherwise the V4 lead ECG signal is shifted upward; If the R wave / S wave ratio and the R wave / T wave ratio in the V4 lead ECG signal increase, it indicates that the V4 lead ECG signal is shifted to the left; otherwise, the V4 lead ECG signal is shifted to the right.

2. A method for correcting ECG electrode position according to claim 1, characterized in that: Preprocessing the original electrocardiogram specifically includes: A 0.3 Hz high-pass filter was used to filter out the baseline drift in the original electrocardiogram, a 50 Hz notch filter was used to filter out the power frequency interference in the original electrocardiogram, and a 50 Hz low-pass filter was used to filter out the myoelectric interference in the original electrocardiogram to obtain the preprocessed original electrocardiogram.

3. The method for correcting ECG electrode position according to claim 1, wherein: The PQRST band is located based on the pre-processed original electrocardiogram, specifically including: Determine the R wave in each ECG signal cycle in each lead ECG signal according to the adaptive threshold method and the linear table; According to the time proportion of each band of P wave, Q wave, S wave and T wave, the P wave, Q wave, S wave and T wave in each ECG signal cycle of each lead ECG signal are determined based on the position of R wave.

4. The method for correcting ECG electrode position according to claim 1, wherein: The second type of feature results are auxiliary to the first type of feature results.

5. An electrocardiogram electrode position correction system, characterized in that: include: The original ECG acquisition module is used to acquire the original ECG collected by the glove acquisition front end; the original ECG includes 12-lead ECG signals; each lead ECG signal includes multiple complete ECG signal cycles; the glove acquisition front end includes a glove and multiple ECG electrodes arranged on the outer side of the palm of the glove; a band positioning module for preprocessing the original electrocardiogram and positioning the PQRST bands based on the preprocessed original electrocardiogram to obtain the P wave, Q wave, R wave, S wave, and T wave corresponding to the target lead electrocardiogram signal; the target lead electrocardiogram signal is the II lead electrocardiogram signal, the V1 lead electrocardiogram signal, the V3 lead electrocardiogram signal, and the V4 lead electrocardiogram signal; The measurement position determination and correction module is used to determine the measurement position of the glove acquisition front end based on the amplitude changes of the P wave, Q wave, R wave, S wave and T wave corresponding to the target lead ECG signal, and to correct the measurement position of the glove acquisition front end when the measurement position of the glove acquisition front end is not in the standard position; The measurement position of the glove acquisition front end is determined based on the amplitude changes of the P wave, Q wave, R wave, S wave, and T wave corresponding to the target lead ECG signal, specifically including: Based on the amplitude changes of the P wave, Q wave, R wave, S wave, and T wave corresponding to the target lead ECG signal, the ratios of different bands are determined to obtain the first and second type feature results; based on the first and second type feature results, the measurement position of the glove acquisition front end is determined; The process of determining the first type of feature results is as follows: If the ratios of T wave / Q wave, S wave / Q wave, and R wave / Q wave in the ECG signal of lead II all increase, it indicates that the ECG signal of lead II is shifted upward. If the ratios of T wave / Q wave, S wave / Q wave, and R wave / Q wave in the ECG signal of lead II all decrease, it indicates that the ECG signal of lead II is shifted downward. If the ratio of the P wave / S wave in the V1 lead ECG signal increases, it indicates that the V1 lead ECG signal is shifted to the left. If the ratio of the P wave / S wave in the V1 lead ECG signal decreases, it indicates that the V1 lead ECG signal is shifted to the right. If the R wave / S wave ratio in the V3 lead ECG signal increases, it indicates that the V3 lead ECG signal is shifted upward, and if the R wave / S wave ratio in the V3 lead ECG signal decreases, it indicates that the V3 lead ECG signal is shifted downward; If the ratios of T wave / Q wave and S wave / Q wave in the V4 lead ECG signal increase, it indicates that the V3 lead ECG signal is shifted upward. If the ratios of T wave / Q wave and S wave / Q wave in the V4 lead ECG signal decrease, it indicates that the V4 lead ECG signal is shifted downward. The process of determining the second type of feature results is as follows: If the ratio of the P wave / Q wave in the V1 lead ECG signal decreases, the ratio of the R wave / P wave increases, the ratio of the T wave / Q wave decreases, and the ratio of the R wave / T wave increases, it indicates that the V1 lead ECG signal is shifted upward; otherwise, the V1 lead ECG signal is shifted downward. If the ratio of R wave / P wave in the V3 lead ECG signal increases, it indicates that the V3 lead ECG signal is shifted to the left, otherwise the V3 lead ECG signal is shifted to the right; If the ratio of R wave / Q wave in the V4 lead ECG signal decreases, it indicates that the V4 lead ECG signal is shifted downward, otherwise the V4 lead ECG signal is shifted upward; If the R wave / S wave ratio and the R wave / T wave ratio in the V4 lead ECG signal increase, it indicates that the V4 lead ECG signal is shifted to the left; otherwise, the V4 lead ECG signal is shifted to the right.

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