CN214434251U - Electrocardio R wave signal detection device - Google Patents
Electrocardio R wave signal detection device Download PDFInfo
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- CN214434251U CN214434251U CN202022500528.9U CN202022500528U CN214434251U CN 214434251 U CN214434251 U CN 214434251U CN 202022500528 U CN202022500528 U CN 202022500528U CN 214434251 U CN214434251 U CN 214434251U
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Abstract
The utility model relates to an electrocardio R ripples signal detection device. The device comprises an initial R wave signal detection module and an R wave signal screening module, wherein the initial R wave signal detection module is connected with the R wave signal screening module; the initial R wave signal detection module is used for carrying out initial R wave peak marking on the obtained at least three electrocardiosignals to obtain at least three initial R wave marked signals; the R wave signal screening module is used for carrying out signal screening processing on the at least three initial R wave mark signals to obtain a target R wave signal; the number of R wave peaks on the target R wave signal is not more than the number of R wave peaks on any one initial R wave signal. By adopting the device, when the R wave is detected, the delay of the R wave detection link is small, and the real-time performance is high.
Description
Technical Field
The utility model relates to a signal processing field especially relates to an electrocardio R ripples signal detection device.
Background
The electrocardiosignals of a human body are acquired by electrodes arranged on the surface of the skin of the human body, the waveform of the normal electrocardiosignals in one period generally consists of a P wave, a QRS complex (a complex representing the depolarization process of ventricular muscle (including ventricular septum)) and a T wave, the QRS complex is the most prominent wave band of the electrocardiogram and is the premise of detecting other waveforms, and therefore the QRS complex is mostly studied clinically to obtain the R wave.
In the related art, when an R wave is obtained, an analog-to-digital converter is usually adopted to perform analog-to-digital conversion on an electrocardiographic signal acquired by an electrode to obtain an electrocardiographic digital signal, and a processor is used to process the electrocardiographic digital signal by adopting a related R wave extraction algorithm to obtain the R wave in the electrocardiographic signal.
However, in the above technology, when detecting the R wave in the electrocardiographic signal, the delay of the detection link is large.
SUMMERY OF THE UTILITY MODEL
Therefore, it is necessary to provide an electrocardiographic R-wave signal detection device, which solves the problem of the prior art that the delay of a detection link is large when detecting an R-wave in an electrocardiographic signal.
An electrocardio R-wave signal detection device comprises an initial R-wave signal detection module and an R-wave signal screening module, wherein the initial R-wave signal detection module is connected with the R-wave signal screening module;
the initial R wave signal detection module is used for carrying out initial R wave peak marking on the obtained at least three electrocardiosignals to obtain at least three initial R wave marked signals;
the R-wave signal screening module is configured to perform signal screening processing on the at least three initial R-wave marker signals to obtain a target R-wave signal; the number of R-wave peaks on the target R-wave signal is not greater than the number of R-wave peaks on any one of the initial R-wave signals.
In one embodiment, the apparatus further comprises a signal conditioning module;
the signal conditioning module is connected with the initial R wave signal detection module and is used for filtering and amplifying the acquired at least three electrocardiosignals and sending the processed at least three electrocardiosignals to the initial R wave signal detection module;
the initial R-wave signal detection module is specifically configured to detect the processed at least three electrocardiographic signals to obtain at least three initial R-wave labeled signals.
In one embodiment, the initial R-wave flag signal is a high-low level signal for marking an R-wave.
In one embodiment, the initial R-wave signal detection module is an operational amplifier.
In one embodiment, the initial R-wave signal detection module is a voltage comparator.
In one embodiment, the number of the voltage comparators is one, the voltage comparators include at least four input terminals, one of the input terminals inputs a voltage of the reference electrocardiographic signal, and the other input terminals except the one input terminal respectively input voltages of the at least three initial R-wave signals.
In one embodiment, the number of the voltage comparators is at least two, and each of the voltage comparators includes an input terminal for inputting the voltage of the reference electrocardiographic signal.
In one embodiment, the voltage of the reference cardiac signal is a fixed voltage value or an adjustable voltage threshold range.
In one embodiment, the R-wave signal screening module is an and circuit module.
In one embodiment, if the at least three initial R-wave flag signals include three initial R-wave flag signals, the and gate circuit module includes two and gate sub-circuits.
In one embodiment, if the at least three initial R-wave flag signals include more than three initial R-wave flag signals, the and gate circuit module includes at least three and gate sub-circuits.
In one embodiment, the and circuit block includes a multi-way and device including at least three inputs.
The electrocardio R-wave signal detection device comprises an initial R-wave signal detection module and an R-wave signal screening module which are mutually connected, wherein the initial R-wave signal detection module is used for carrying out initial R-wave peak marking on at least three acquired electrocardiosignals to obtain at least three initial R-wave marked signals, and the R-wave signal screening module is used for carrying out screening processing on at least the initial R-wave marked signals to obtain a target R-wave signal. And the number of R wave peaks on the target R wave signal is not more than the number of R wave peaks on any one initial R wave signal. In this electrocardio R wave signal detection device, because carry out R wave crest mark and screening through interconnect's initial R wave signal detection module and R wave signal screening module and just can obtain target R wave signal, need not pass through the complex data processing of signal sampling and algorithm, just so can not introduce extra detection delay, the speed that obtains R wave signal like this promptly will be comparatively fast to can make the delay of detecting the link little, the real-time is high.
Drawings
FIG. 1 is a schematic structural diagram of an apparatus for detecting an R-wave cardiac signal according to an embodiment;
FIG. 2 is a schematic structural diagram of an apparatus for detecting an electrocardiographic R-wave signal according to another embodiment;
FIG. 3 is a schematic illustration of performing R-wave peak labeling as provided in one embodiment;
FIG. 4 is a schematic diagram of a voltage comparator including at least four input terminals provided in one embodiment;
FIG. 5 is a schematic diagram of a voltage comparator including two input terminals provided in one embodiment;
FIG. 6 is a schematic diagram including two AND gate sub-circuits provided in one embodiment;
FIG. 7 is a schematic diagram including three AND gate sub-circuits provided in one embodiment;
FIG. 8 is a diagram illustrating an example of R-wave filtering using an AND circuit in one embodiment;
description of reference numerals:
the initial R wave signal detection module: 100, respectively;
r wave signal screening module: 200 of a carrier;
a signal conditioning module: 300.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Before describing the embodiments of the present application, the source of the electrocardiographic signal is described first, generally, the biopotential electrode is placed at a specific portion of a human body to detect the signal of the heart, and the differential voltage between two electrodes or the differential voltage between one electrode and the average voltage of multiple electrodes is a single electrocardiographic signal. Generally, the electrocardiographic signals are also called electrocardiographic lead signals, and the electrocardiographic lead refers to a connection mode that an input lead and a biological electrode are placed at a specific part (positive input end), a reference part (negative input end) and a grounding part of a human body, and the electrocardiographic signals measured by the mode are the electrocardiographic lead signals. The specific part can be a left ear, a right ear, a left hand, a right hand, a left foot, a right foot, a heart and the like. Generally, one or two electrodes are connected to the heart and called direct leads, and electrodes are located further away from the heart (more than 2 times the diameter of the heart) and called indirect leads.
Generally, the waveform of a normal electrocardiographic signal in one cycle is composed of a P wave, a QRS complex (a complex representing a depolarization process of ventricular muscle (including ventricular septum)) and a T wave, the QRS complex is the most prominent wave band of an electrocardiogram and is a prerequisite for detecting other waveforms, and therefore, the QRS complex is mostly studied clinically to obtain an R wave therefrom. In the related art, when an R wave is obtained, an analog-to-digital converter is usually adopted to perform analog-to-digital conversion on an electrocardiographic signal acquired by an electrode to obtain an electrocardiographic digital signal, and a processor is used to process the electrocardiographic digital signal by adopting a related R wave extraction algorithm to obtain the R wave in the electrocardiographic signal. However, when the technology detects the R wave in the electrocardiosignal, the delay of the detection link is large; and the hardware and software costs of detection are large. Therefore, the application provides an electrocardio R wave signal detection device, can solve above-mentioned technical problem.
Next, terms related to the present application will be described:
ECG, known collectively as electrocardiograph, is a technique for recording from the body surface the pattern of electrical activity changes produced by each cardiac cycle of the heart using an electrocardiograph.
R tag signal: r wave signal.
Specific examples of the present application will be described below.
Fig. 1 is a schematic structural diagram of an electrocardiographic R-wave signal detection device provided in an embodiment. As shown in fig. 1, the electrocardiographic R-wave signal detecting apparatus includes an initial R-wave signal detecting module 100 and an R-wave signal screening module 200, wherein the initial R-wave signal detecting module 100 is connected to the R-wave signal screening module 200; the initial R-wave signal detection module 100 is configured to perform initial R-wave peak labeling on the acquired at least three electrocardiographic signals to obtain at least three initial R-wave labeled signals; the R-wave signal screening module 200 is configured to perform signal screening processing on the at least three initial R-wave marker signals to obtain a target R-wave signal; the number of R-wave peaks on the target R-wave signal is not greater than the number of R-wave peaks on any one of the initial R-wave signals.
The connection between the initial R-wave signal detection module 100 and the R-wave signal screening module 200 may be an electrical connection, or may be other connection, and this embodiment is not limited in this embodiment.
The at least three acquired electrocardiographic signals refer to electrocardiographic signals acquired on at least three channels, and when electrocardiographic signals are acquired in an actual process, as can be known from the background description, by providing a plurality of electrocardiographic signal acquisition channels, electrocardiographic signals of a plurality of channels can be acquired, and here, the acquisition of at least three electrocardiographic signals is taken as an example for description. It should be noted that the more the number of channels of the electrocardiographic signal is, the better, the more the number of channels of the electrocardiographic signal is.
In addition, when at least three electrocardiosignals are obtained, the voltage of each point on each electrocardiosignal can be obtained. The initial R-wave signal detection module 100 may include a voltage comparison module, where the voltage comparison module may include an electrocardiographic signal reference voltage, and after the voltage of each point on at least three electrocardiographic signals is obtained, an R-wave peak may be marked on the obtained at least three electrocardiographic signals by comparing the voltage of the electrocardiographic signal with the electrocardiographic signal reference, for example, a point higher than the electrocardiographic signal reference voltage may be marked as an R-wave peak, or a point lower than the electrocardiographic signal reference voltage may be marked as a non-R-wave peak, and in short, an R-wave peak may be marked on each electrocardiographic signal.
Of course, the initial R-wave signal detection module 100 may also be implemented by other modules, and this embodiment is only an example and is not limited in particular.
It should be noted that, after the R-wave peak labeling is performed on at least three electrocardiographic signals, the R-wave peaks on each initial R-wave labeled signal obtained may be the same or different, and the number of the R-wave peaks may be equal or different.
Of course, after the R-wave peak is labeled for each electrocardiographic signal, the R-wave labeled signal corresponding to each electrocardiographic signal can be obtained and is recorded as the initial R-wave labeled signal.
Further, after at least three initial R-wave labeled signals are obtained by R-wave labeling of the electrocardiosignal, the at least three initial R-wave labeled signals may be screened to obtain a target R-wave signal. Optionally, the screening method here may be to combine the multiple initial R-wave marker signals, and synthesize to obtain a corresponding R-wave marker signal, which is recorded as a target R-wave signal; of course, each initial R-wave marker signal may be compared, and a corresponding initial R-wave marker signal may be selected as the target R-wave signal; of course, other screening methods are also possible, and in any case, a target R-wave signal is finally obtained.
It should be noted that, because the acquired electrocardiographic signals inevitably have noise and interference, and the noise and interference may be mixed into the electrocardiographic signals and be mistakenly marked as R-wave peaks, when the initial R-wave marking signals are screened here, it is essential to remove the noise and interference existing on the initial R-wave marking signals, and after the noise and interference are removed, the number of peaks on the target R-wave signal finally obtained is usually less than or equal to the number of R-wave peaks on the initial R-wave marking signals.
The electrocardio R-wave signal detection device comprises an initial R-wave signal detection module and an R-wave signal screening module which are mutually connected, wherein the initial R-wave signal detection module is used for carrying out initial R-wave peak marking on at least three acquired electrocardiosignals to obtain at least three initial R-wave marked signals, and the R-wave signal screening module is used for carrying out screening processing on at least the initial R-wave marked signals to obtain a target R-wave signal. And the number of R wave peaks on the target R wave signal is not more than the number of R wave peaks on any one initial R wave signal. In this electrocardio R wave signal detection device, because carry out R wave crest mark and screening through interconnect's initial R wave signal detection module and R wave signal screening module and just can obtain target R wave signal, need not pass through the complex data processing of signal sampling and algorithm, just so can not introduce extra detection delay, the speed that obtains R wave signal like this promptly will be comparatively fast to can make the delay of detecting the link little, the real-time is high. In addition, because the processor and the digital-analog/analog-digital sampling module are not needed to be used for processing, and only the initial R wave signal detection module and the R wave signal screening module are needed to be used for obtaining the R wave signal, the device can reduce the hardware cost for detecting the R wave, and because the algorithm of the processor is not needed to be used for data processing, the software cost can also be reduced.
Fig. 2 is a schematic structural diagram of an electrocardiographic R-wave signal detection device provided in another embodiment. As shown in fig. 2, on the basis of the above embodiment, the electrocardiographic R-wave signal detecting apparatus further includes a signal conditioning module 300, where the signal conditioning module 300 is connected to the initial R-wave signal detecting module 100, and is configured to filter and amplify the obtained at least three electrocardiographic signals, and send the processed at least three electrocardiographic signals to the initial R-wave signal detecting module 100; the initial R-wave signal detection module 100 is specifically configured to detect the processed at least three electrocardiographic signals to obtain at least three initial R-wave labeled signals.
The signal conditioning module 300 may include a filtering module and a signal amplifying module, and may also include other modules, such as a signal isolation module, a signal compensation module, and the like. The filtering module may adopt a filter, and the filter may be a low-pass filter, a high-pass filter, or the like; the signal amplifying module can adopt an operational amplifier, and the operational amplifier can be a multiplication operational amplifier, an addition operational amplifier and the like.
In addition, the connection mode between the signal conditioning module 300 and the initial R-wave signal detection module 100 is electrical connection, but other connection modes may be used, and the embodiment is not limited in detail here. The connection sequence of the signal conditioning module 300, the initial R-wave signal detection module 100 and the R-wave signal screening module 200 is as follows: the signal conditioning module 300 is connected to the initial R-wave signal detecting module 100, and the initial R-wave signal detecting module 100 is further connected to the R-wave signal screening module 200.
Further, when the electrocardiographic signals are actually detected, the electrocardiographic signals acquired by the electrodes firstly enter the signal conditioning module 300, and after the signal conditioning module 300 obtains at least three electrocardiographic signals, the plurality of electrocardiographic signals can be filtered to obtain filtered signals, and the filtered signals are amplified to obtain amplified electrocardiographic signals; of course, the plurality of electrocardiographic signals may be amplified to obtain amplified electrocardiographic signals, and then the amplified electrocardiographic signals are filtered to obtain filtered electrocardiographic signals; of course, other signal conditioning processes can be performed, and finally the electrocardiographic signal after signal conditioning can be obtained.
It should be noted that, when the signal conditioning module 300 performs filtering and amplification processing on the plurality of electrocardiographic signals, each electrocardiographic signal may perform filtering and amplification processing in sequence, or may perform filtering and amplification processing on the plurality of electrocardiographic signals simultaneously; of course, other processing manners may be used, and this embodiment is not particularly limited thereto.
When the electrocardio R-wave signal is detected, the obtained at least three electrocardiosignals are filtered and amplified by the signal conditioning module 300 to obtain at least three processed electrocardiosignals. Then, the signal conditioning module 300 may input the processed at least three electrocardiographic signals to the initial R-wave signal detection module 100, and perform R-wave peak labeling on the processed at least three electrocardiographic signals by using the initial R-wave signal detection module 100 to obtain an R-wave labeled signal corresponding to each processed electrocardiographic signal, and record the R-wave labeled signal as an initial R-wave labeled signal.
In this embodiment, the electrocardiographic R-wave signal detecting device further includes a signal conditioning module; the signal conditioning module is connected with the initial R wave signal detection module and is used for filtering and amplifying the acquired at least three electrocardiosignals and sending the processed at least three electrocardiosignals to the initial R wave signal detection module; the initial R-wave signal detection module is specifically configured to detect the processed at least three electrocardiographic signals to obtain at least three initial R-wave labeled signals. Because the signal conditioning module can filter and amplify the electrocardiosignals, the electrocardiosignals can be converted into standard electrocardiosignals, the subsequent initial R wave signal detection module can conveniently mark R wave peaks on the electrocardiosignals, and the R wave peaks marked on the electrocardiosignals can be more accurate.
In the above embodiment, it is mentioned that the initial R-wave signal detection module 100 may include a voltage comparison module, and two possible implementations are given below.
In a possible implementation manner, optionally, the initial R-wave signal detection module 100 is an operational amplifier. In another possible embodiment, optionally, the initial R-wave signal detection module 100 is a voltage comparator.
The operational amplifier or the voltage comparator is adopted, the operational amplifier or the voltage comparator comprises a reference voltage which is recorded as a reference electrocardiosignal voltage, and then the voltage of the electrocardiosignal can be compared with the voltage of the reference electrocardiosignal to obtain a voltage comparison result. Optionally, the initial R-wave flag signal is a high-low level signal for marking an R-wave. Referring to fig. 3, in order to schematically mark the R wave peak by using the voltage comparator, when the voltage (ECG _ Sign0) of the electrocardiographic signal at a point is higher or lower than the voltage (Vref) of the reference electrocardiographic signal, the voltage at the point can be set to be high, otherwise, the voltage is set to be low, where the high is the marked R wave peak. By performing the above operations on all points on one electrocardiographic signal, high-low level signals corresponding to the electrocardiographic signal can be obtained, and by performing the above operations on all electrocardiographic signals, high-low level signals (Sign _ in0) corresponding to the electrocardiographic signals can be obtained.
Optionally, the voltage of the reference electrocardiographic signal is a fixed voltage value or an adjustable voltage threshold range. The adjustable voltage threshold range can be set according to practical situations, and this embodiment does not specifically limit this. The voltage of the reference electrocardiosignal is within the adjustable voltage threshold range, so that the application range of the electrocardiosignal can be enlarged, and the electrocardiosignal reference device can be suitable for different people to improve universality.
In addition, the operational amplifier and the voltage comparator are used as an initial R wave signal detection module, so that the R wave peak marking process can be simplified into a voltage comparison process, the R wave peak marking process can be quantized, and the R wave peak marking result is more accurate.
In the following, a specific description is given of an embodiment in which the initial R-wave signal detection module 100 is a voltage comparator, and when a voltage comparator is used, since there are at least three electrocardiographic signals to be compared, and the voltage comparator generally has one reference signal voltage, one or more (two or more) voltage comparators are required. The following description is divided into the case where one voltage comparator is required or the case where two or more voltage comparators are required.
First, the number of voltage comparators is described as one:
fig. 4 is a schematic diagram of a voltage comparator including at least four input terminals, and as shown in fig. 4, the number of the voltage comparators is one, the voltage comparator includes at least four input terminals, one of the input terminals inputs the voltage of the reference electrocardiographic signal, and the other input terminals except the one input terminal respectively input the voltages of the at least three initial R-wave signals.
That is, when the voltage comparator is provided, any one of the input terminals of the voltage comparator may be set as a reference electrocardiographic signal voltage input terminal, and the other input terminals may be set to receive the voltage of each electrocardiographic signal. The number of input terminals of the voltage comparator may be set according to the actual installation situation, the cost, the design difficulty, and the like, and the specific number is not specifically limited here, and may be 4 or more.
When the voltage comparator is used for voltage comparison, the voltage of each channel of electrocardiosignals can be simultaneously compared with the voltage of the reference electrocardiosignal to obtain the voltage comparison result corresponding to each channel of electrocardiosignals, and the high-low level signals corresponding to each channel of electrocardiosignals can be obtained. Of course, the electrocardiographic signals of each channel may be sequentially compared with the reference electrocardiographic signal voltage to obtain a voltage comparison result corresponding to the electrocardiographic signals of each channel, so as to obtain high and low level signals corresponding to the electrocardiographic signals of each channel. In this embodiment, although not particularly limited to this, in short, the initial R-wave flag signal corresponding to each channel of electrocardiographic signal, that is, the high-low level signal, can be obtained by the single voltage comparator.
The voltage comparator is used for detecting the voltage of the multipath initial R wave signals, so that the number of input terminals of the reference voltage can be saved, more terminals can be used for detecting the voltage of the initial R wave signals, and the detection range is expanded.
The following description is made with respect to the number of voltage comparators being at least two:
optionally, the number of the voltage comparators is at least two, and each of the voltage comparators includes an input terminal to which a voltage of the reference electrocardiographic signal is input.
Taking the above-mentioned electrocardiographic signals as three electrocardiographic signals as an example, when the number of the voltage comparators is at least two, the number of the voltage comparators may be two or three. If the number of the voltage comparators is two, as shown in fig. 5, the input terminal of one voltage comparator may be configured to have three input terminals, one of the input terminals inputs the voltage of the reference electrocardiographic signal, and the other two input terminals respectively input the voltages of the two paths of electrocardiographic signals; the other voltage comparator may be configured to have two input terminals, and is a schematic diagram of a voltage comparator including two input terminals, one input terminal inputs the voltage of the reference electrocardiographic signal, and the other input terminal inputs the voltage of the remaining one electrocardiographic signal. For the comparison process of the voltages, reference may be made to the above-mentioned case of at least four input terminals, which is not described herein again.
Of course, if the number of the voltage comparators is three, each voltage comparator is a voltage comparator including two input terminals, that is, three voltage comparators shown in fig. 5, one input terminal inputs the voltage of the reference electrocardiographic signal, and the other input terminal inputs the voltage of one electrocardiographic signal. For the comparison process of the voltage of each voltage comparator, reference may be made to the above-mentioned case of at least four input terminals, which is not described herein again.
The voltage comparators are adopted, and the number of the input terminals included in each voltage comparator is small, so that the process difficulty of the voltage comparators can be reduced, and meanwhile, the cost of the voltage comparators is saved.
The embodiment in which the initial R-wave signal detection module 100 is an operational amplifier may be the same as the embodiment of the voltage comparator, and will not be described herein again.
In another embodiment, when the R-wave signal screening module 200 is used to screen multiple signals marked with R-waves to obtain a target R-wave signal, an and circuit may be used to screen the target R-wave signal, that is, optionally, the R-wave signal screening module 200 is an and circuit module.
When the and circuit is used for signal screening, as can be seen from the above description, the initial R-wave mark signals are all high-low level signals, and when the and circuit module is used for processing, each point in each high-low level signal is only high level, and then the point on the final target R-wave signal is high level, and if the point in one high-low level signal is low level, then the point on the final target R-wave signal is low level.
As for an individual, the time points of the R wave peaks of all the electrocardiosignals are consistent, but the probability that noise and interference appear on each electrocardiosignal is random, the AND gate circuit is adopted to screen the R wave peaks, the interference and the noise can be removed, and the real R wave signals are screened, namely the finally obtained target R wave signals are more accurate.
Here, the and gate circuit module is used as the initial R wave signal detection module 100, which can simplify the R wave screening process, and the and gate comparison method is simpler to obtain the screening result, so that the accuracy of the detection result can be improved, and the real-time performance of R wave detection can be further improved.
Further, when the and gate circuit module is used for screening a plurality of initial R-wave flag signals, different numbers of and gate sub-circuits can be set according to different numbers of the initial R-wave flag signals. The following description is divided into three initial R-wave marker signals and more than three initial R-wave marker signals:
first, a case including three initial R-wave marker signals will be described:
optionally, if the at least three initial R-wave flag signals include three initial R-wave flag signals, the and gate circuit module includes two and gate sub-circuits.
Here, it is assumed that three initial R-wave flag signals are denoted as a first initial R-wave signal, a second initial R-wave signal, and a third initial R-wave signal, and two and gate sub-circuits are respectively a first and gate sub-circuit and a second and gate sub-circuit, as shown in fig. 6, when an and gate module is used for performing an and gate process, the first and gate sub-circuit may be used to perform an and gate operation process on the first initial R-wave signal and the second initial R-wave signal to obtain a candidate R-wave signal, and then the second and gate sub-circuit may be used to perform an and gate operation process on the candidate R-wave signal and the third initial R-wave signal to obtain a target R-wave signal.
Next, a case where three or more initial R-wave marker signals are included will be described:
optionally, if the at least three initial R-wave flag signals include more than three initial R-wave flag signals, the and gate circuit module includes at least three and gate sub-circuits.
Here, it is also assumed that three initial R-wave mark signals are denoted as a first initial R-wave signal, a second initial R-wave signal, and a third initial R-wave signal, and three and gate sub-circuits are respectively a first and gate sub-circuit, a second and gate sub-circuit, and a third and gate sub-circuit, as shown in fig. 7, when an and gate module is used for performing and gate processing, the first and gate sub-circuit may be used for performing and gate operation processing on the first initial R-wave signal and the second initial R-wave signal to obtain a first candidate R-wave signal, and the second and gate sub-circuit may be used for performing and gate operation processing on the third initial R-wave signal and the fourth initial R-wave signal to obtain a second candidate R-wave signal; and performing AND gate operation processing on the first candidate R wave signal and the second candidate R wave signal by using a third AND gate sub-circuit to obtain a target R wave signal.
The number of the AND gate circuits can be adaptively adjusted according to the difference of the number of the initial R wave signals, so that the R wave detection device can be suitable for R wave detection under more conditions, and the application range of the R wave detection is widened.
Illustratively, a specific example is given below, referring to fig. 8, assuming that n initial R-wave mark signals are respectively denoted as Sign _ in0, Sign _ in1, Sign _ in2,.. Sign _ in (n-1), Sign _ in, and their respective corresponding high and low levels are referred to fig. 8, and a final target R-wave signal is referred to Sign _ out in fig. 8, where n may be set according to actual conditions, and may be, for example, 3 to 20. As can be seen from the figure, the high level in the target R-wave signal Sign _ out is high only if it is high at the point in Sign _ in0-Sign _ inn, and otherwise it is low. That is to say, the finally obtained target R-wave signal is obtained by performing and obtaining multiple paths of high and low level signals, so that the accuracy of the finally obtained target R-wave signal can be ensured.
It should be noted that the number of and circuits is not as large as possible, and the specific number may be set according to the number of initial R-wave flag signals, and this embodiment is not limited in particular.
Further, the and circuit module comprises a multi-way and device, and the multi-way and device comprises at least three inputs. The at least three inputs can be used for inputting each path of initial R wave marking signals, and carrying out AND operation on each path of initial R wave marking signals to obtain final target R wave signals. The multi-channel AND gate device is adopted, so that the number of the AND gate devices can be reduced, and the cost of the whole detection device can be saved as much as possible.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. The electrocardio R-wave signal detection device is characterized by comprising an initial R-wave signal detection module and an R-wave signal screening module, wherein the initial R-wave signal detection module is connected with the R-wave signal screening module;
the initial R wave signal detection module is used for carrying out initial R wave peak marking on the obtained at least three electrocardiosignals to obtain at least three initial R wave marked signals;
the R wave signal screening module is used for carrying out signal screening processing on the at least three initial R wave mark signals to obtain a target R wave signal; the number of R wave peaks on the target R wave signal is not more than the number of R wave peaks on any one initial R wave signal.
2. The apparatus according to claim 1, further comprising a signal conditioning module;
the signal conditioning module is connected with the initial R wave signal detection module and is used for filtering and amplifying the acquired at least three electrocardiosignals and sending the processed at least three electrocardiosignals to the initial R wave signal detection module;
the initial R-wave signal detection module is specifically configured to detect the processed at least three electrocardiographic signals to obtain at least three initial R-wave labeled signals.
3. The apparatus according to claim 1 or 2, wherein said initial R-wave flag signal is a high-low level signal for marking R-wave.
4. The apparatus according to claim 1, wherein said initial R-wave signal detecting module is a voltage comparator.
5. The electrocardiographic R-wave signal detecting device according to claim 4, wherein the number of the voltage comparators is one, the voltage comparators include at least four input terminals, one of the input terminals receives a voltage of the reference electrocardiographic signal, and the other input terminals except the one input terminal receive respective voltages of the at least three initial R-wave signals.
6. The apparatus according to claim 4, wherein said voltage comparators are at least two in number, and each of said voltage comparators includes an input terminal to which a voltage of a reference electrocardiographic signal is inputted.
7. The apparatus according to claim 5 or 6, wherein the voltage of said reference cardiac signal is a fixed voltage value or an adjustable voltage threshold range.
8. The apparatus according to claim 1 or 2, wherein said R-wave signal screening module is an and gate module.
9. The apparatus according to claim 8, wherein said and gate module comprises two and gate sub-circuits if said at least three initial R-wave flag signals comprise three initial R-wave flag signals.
10. The apparatus according to claim 8, wherein said and gate module comprises at least three and gate circuits if said at least three initial R-wave flag signals comprise more than three initial R-wave flag signals.
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