CN110840436B - Method, device, terminal and computer-readable storage medium for acquiring electrocardiosignals - Google Patents
Method, device, terminal and computer-readable storage medium for acquiring electrocardiosignals Download PDFInfo
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
- A61B5/316—Modalities, i.e. specific diagnostic methods
- A61B5/318—Heart-related electrical modalities, e.g. electrocardiography [ECG]
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
- A61B5/024—Detecting, measuring or recording pulse rate or heart rate
- A61B5/02416—Detecting, measuring or recording pulse rate or heart rate using photoplethysmograph signals, e.g. generated by infrared radiation
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
- A61B5/024—Detecting, measuring or recording pulse rate or heart rate
- A61B5/0245—Detecting, measuring or recording pulse rate or heart rate by using sensing means generating electric signals, i.e. ECG signals
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
- A61B5/7225—Details of analog processing, e.g. isolation amplifier, gain or sensitivity adjustment, filtering, baseline or drift compensation
Abstract
The invention belongs to the technical field of electrocardio detection, and particularly relates to a method, a device, a terminal and a computer readable storage medium for acquiring electrocardiosignals. Wherein the method comprises the following steps: acquiring an original pulse signal; sending the original pulse signal to an amplifying circuit unit, and amplifying the original pulse signal by the amplifying circuit unit to obtain an amplified pulse signal; receiving the amplified pulse signals, and converting the amplified pulse signals into electrocardiosignals by performing feature point extraction and feature point calculation on the amplified pulse signals; the acquisition of the electrocardiosignals is more convenient, electrodes do not need to be added, leads do not need to be formed, multipoint monitoring is not needed, and people can carry out electrocardiogram monitoring anytime and anywhere.
Description
Technical Field
The invention belongs to the technical field of electrocardio detection, and particularly relates to a method, a device, a terminal and a computer readable storage medium for acquiring electrocardio signals.
Background
At present, the electrocardiogram of the human body is generally obtained by contacting electrodes with the human body to form leads and recording the curve of the heart potential changing along with time from the surface of the body.
Along with the rise of product is dressed to intelligence, people hope at the wrist-watch, add the electrode on the bracelet, form the lead through controlling the hand and acquire human heart electrograph, make heart electrograph examination can be daily normalized, it is normalized, let the common people can do heart electrograph examination anytime and anywhere, however, because add the electrode on the bracelet wrist-watch and receive material electric conductivity easily, the influence of skin friendship nature, make intelligent bracelet, the heart electrograph that the wrist-watch acquireed is very unsatisfactory, in addition because form the lead, both hands must contact the bracelet simultaneously, the wrist-watch, can't realize long-term continuous monitoring heart electrograph.
Disclosure of Invention
In view of this, embodiments of the present invention provide a method, an apparatus, a terminal and a computer-readable storage medium for acquiring an electrocardiographic signal, which can solve the technical problem in the prior art that the acquisition of a central electrical signal is not convenient enough.
The first aspect of the embodiments of the present invention provides a method for acquiring an electrocardiographic signal, including:
acquiring an original pulse signal;
sending the original pulse signal to an amplifying circuit unit, and amplifying the original pulse signal by the amplifying circuit unit to obtain an amplified pulse signal;
and receiving the amplified pulse signals, and converting the amplified pulse signals into electrocardiosignals by performing feature point extraction and feature point calculation on the amplified pulse signals.
A second aspect of the embodiments of the present invention provides a device for acquiring an electrocardiographic signal, including:
an acquisition unit for acquiring an original pulse signal;
the amplifying unit is used for sending the original pulse signal to the amplifying circuit unit, and the amplifying circuit unit amplifies the original pulse signal to obtain an amplified pulse signal;
and the conversion unit is used for receiving the amplified pulse signals and converting the amplified pulse signals into the electrocardiosignals by performing characteristic point extraction and characteristic point calculation on the amplified pulse signals.
A third aspect of the embodiments of the present invention provides a terminal for acquiring an electrocardiographic signal, including a pulse signal acquisition unit, a control unit, and an amplification circuit unit;
the pulse signal acquisition unit is used for acquiring an original pulse signal;
the control unit is used for acquiring the original pulse wave signals acquired by the pulse signal acquisition unit, sending the original pulse signals to the amplification circuit unit, and amplifying the original pulse signals by the amplification circuit unit to obtain amplified pulse signals;
the control unit is further used for receiving the amplified pulse signals and converting the amplified pulse signals into electrocardiosignals by performing feature point extraction and feature point calculation on the amplified pulse signals.
A fourth aspect of the embodiments of the present invention provides a computer-readable storage medium, where a computer program is stored, and the computer program, when executed by a processor, implements the steps of the method according to the first aspect.
In the embodiment of the invention, the obtained original pulse signal is amplified, and the amplified pulse signal is converted into the electrocardiosignal by performing characteristic point extraction and characteristic point calculation on the amplified pulse signal, so that the pulse signal is mapped to the electrocardiosignal, the electrocardiosignal is more convenient to obtain, people can perform electrocardiogram monitoring at any time and any place, and the technical problem that the central electric signal in the prior art is not convenient to obtain is solved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic flow chart illustrating an implementation of a method for acquiring an electrocardiograph signal according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a circuit configuration for acquiring a high fidelity pulse signal according to an embodiment of the present invention;
fig. 3 is a schematic flowchart illustrating a specific implementation of step 103 of the method for acquiring an electrocardiographic signal according to the embodiment of the present invention;
FIG. 4 is a schematic diagram illustrating an effect of converting an amplified pulse signal into a cardiac signal according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of an apparatus for acquiring an electrocardiographic signal according to an embodiment of the present invention;
fig. 6 is a schematic view of a first structure of a terminal for acquiring an electrocardiographic signal according to an embodiment of the present invention;
fig. 7 is a schematic diagram of a second structure of the terminal for acquiring an electrocardiograph signal according to the embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The described embodiments are illustrative of some, but not all embodiments of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the embodiment of the invention, the obtained original pulse signal is amplified, and the amplified pulse signal is converted into the electrocardiosignal by performing characteristic point extraction and characteristic point calculation on the amplified pulse signal, so that the pulse signal is mapped to the electrocardiosignal, the electrocardiosignal is more convenient to obtain, people can perform electrocardiogram monitoring at any time and any place, and the technical problem that the central electric signal in the prior art is not convenient to obtain is solved.
Fig. 1 shows a schematic implementation flow diagram of a method for acquiring an electrocardiographic signal according to an embodiment of the present invention, where the method may be executed by a device for acquiring an electrocardiographic signal, the device may be implemented by software and/or hardware, and is configured at a terminal that needs to acquire an electrocardiographic signal, and the terminal may be a terminal such as a smart phone, a tablet computer, and a wearable device. Specifically, the method for acquiring an electrocardiographic signal may include steps 101 to 103.
In some embodiments of the present application, the acquiring the raw pulse signal may include: the method comprises the steps of acquiring an original pulse signal acquired by a photoelectric pulse sensor, or acquiring an original pulse signal acquired by a piezoresistive pulse sensor, or acquiring an original pulse signal acquired by other modes such as an original pulse signal acquired by a piezoelectric pulse sensor. For convenience of description, the embodiments of the present invention will be described with reference to the example of acquiring the raw pulse signal collected by the photoelectric pulse sensor.
Optionally, after acquiring the raw pulse signal acquired by the photoelectric pulse sensor, the method may further include: detecting whether the signal intensity of the original pulse signal is smaller than a first preset threshold value, and if the signal intensity of the original pulse signal is smaller than the first preset threshold value, adjusting the luminous intensity of the photoelectric pulse sensor so that the signal intensity of the original pulse signal detected by the photoelectric pulse sensor is larger than or equal to the first preset threshold value.
Because the photoelectric pulse sensor converts the change of the light transmittance of the blood vessel in the pulse beating process into an electric signal to output to obtain a pulse signal in a reflection or correlation mode, and the light transmittance of the skin with different colors is different, after the original pulse signal acquired by the photoelectric pulse sensor is acquired, the luminous intensity of the photoelectric pulse sensor can be automatically adjusted by detecting whether the signal intensity of the original pulse signal is smaller than a first preset threshold value, so that the acquisition of the electrocardiosignal can be self-adaptive to users with different skin colors.
The specific value of the first preset threshold can be set according to practical experience, and only the signal intensity of the acquired original pulse signal is required to be ensured not to influence subsequent processing of the pulse signal. The photoelectric pulse sensor can adopt a pulse sensor with the model of SON 1113.
And 102, sending the original pulse signal to an amplifying circuit unit, and amplifying the original pulse signal by the amplifying circuit unit to obtain an amplified pulse signal.
Because the original pulse signals collected by the pulse sensor are only about 1mv generally, after the qualified original pulse signals are obtained, the original pulse signals need to be amplified, and subsequent sampling and calculation are facilitated.
In order to adapt to the difference of blood flow strength of different users and avoid that the signal strength of the amplified pulse signal is too large or too small, i.e. the waveform amplitude of the pulse signal is too large, the crest is cut down, or too small to be sampled, some embodiments of the invention, after sending the original pulse signal to the amplifying circuit unit, comprise: and detecting the signal intensity of the amplified pulse signal output by the amplifying circuit unit, judging whether the signal intensity of the amplified pulse signal is greater than a second preset threshold or less than a third preset threshold, and if the signal intensity of the amplified pulse signal is greater than the second preset threshold or less than the third preset threshold, adjusting the gain of the amplifying circuit unit so that the signal intensity of the amplified pulse signal output by the amplifying circuit unit is greater than or equal to the third preset threshold and less than or equal to the second preset threshold.
The specific values of the second preset threshold and the third preset threshold can be set according to practical experience, and only the signal intensity of the amplified pulse signal is required to be ensured not to influence the sampling and calculation of the pulse signal.
In order to obtain more accurate electrocardiosignals when the amplified pulse signals are subsequently converted into electrocardiosignals, the amplified pulse signals need to be ensured to be high-fidelity pulse signals when the original pulse signals are amplified.
Optionally, as shown in fig. 2, a schematic diagram of a circuit structure for acquiring a high-fidelity pulse signal according to an embodiment of the present invention is provided.
An original pulse signal input end PPG _ DC is used for inputting an original pulse signal, the original pulse signal input end PPG _ DC is connected with one end of a first resistor R1, one end of a second resistor R2 and one end of a third resistor R3 in common, the other end of the first resistor R1 is grounded, the other end of the second resistor R2 is connected with one end of a first filter capacitor C1 and a first input end VIND + of an amplifier, the other end of the first filter capacitor C1 is grounded, the other end of the third resistor R3 is connected with one end of a fourth resistor R4, one end of a fifth resistor R5, one end of a sixth resistor R6, one end of a seventh resistor R7, one end of a second filter capacitor C2, a second input end VIND of an amplifier, one end of an eighth resistor R8 and one end of a third filter capacitor C3 in common, an output end VOUTD of the amplifier is connected with the other end of an eighth resistor R8 and the other end of the third filter capacitor C3 in common, the other end of the fourth resistor R4, the other end of the fifth resistor R5, the other end of the sixth resistor R6 and the other end of the seventh resistor R7 are respectively connected with a fifth pin, a fourth pin, a second pin and a first pin of a multiplexer SGM48780, a third pin of the SGM48780 is connected with an output end VOUTD of the amplifier, a seventh pin of the SGM48780 is connected with a gain signal input end and used for inputting a gain signal for controlling the specific amplification factor of an original pulse signal, and an eighth pin of the SGM48780 is connected with a clock signal input end and used for inputting a clock synchronization signal; a sixth pin of the SGM48780 is connected to an enable signal input terminal, a tenth pin of the SGM48780 is connected to a 3.3V voltage source, and a ninth pin of the SGM48780 is connected to ground.
In the embodiment of the invention, after the original pulse signal is input to the original pulse signal input end PPG _ DC, the high-fidelity pulse signal which meets the sampling requirement is output after the original pulse signal is filtered and amplified by the amplifying circuit unit.
In the embodiment of the invention, the pulse signals and the electrocardiosignals are signals reflecting heart activities, so that when the amplified pulse signals output by the amplifying circuit unit are received, the electrocardiosignals can be obtained by performing characteristic point extraction and characteristic point calculation on the amplified pulse signals to convert the amplified pulse signals into the electrocardiosignals, electrodes do not need to be added, and leads and multi-point monitoring do not need to be formed, so that the electrocardiosignals can be obtained more conveniently, people can perform electrocardiogram monitoring at any time and any place (for example, the electrocardiosignals are output in an electrocardiogram mode after the electrocardiosignals are obtained), and the technical problem that the acquisition of the electrocardiosignals in the prior art is not convenient enough is solved.
Optionally, as shown in fig. 3, the converting the amplified pulse signal into the electrocardiographic signal by performing feature point extraction and feature point calculation on the amplified pulse signal includes: step 301 to step 302.
In the embodiment of the invention, after the amplified pulse signal is obtained, the amplified pulse signal is sampled to obtain a plurality of characteristic points, and the signal intensity of the electrocardiosignal corresponding to each characteristic point is calculated, so that a series of electrocardiosignal characteristic points are obtained, and the electrocardiosignal is formed.
For example, as shown in fig. 4, when the amplified pulse signal is converted into the electrocardiographic signal, the characteristic points A, B, C, D, E of the amplified pulse signal correspond to the characteristic points P, Q, R, S, T in the electrocardiographic signal.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
As shown in fig. 5, a schematic structural diagram of an apparatus 5 for acquiring an electrocardiographic signal according to an embodiment of the present invention includes: an acquisition unit 51, an amplification unit 52 and a transformation unit 53.
The obtaining unit 51 is configured to obtain an original pulse signal;
the amplifying unit 52 is configured to send the original pulse signal to an amplifying circuit unit, and the amplifying circuit unit amplifies the original pulse signal to obtain an amplified pulse signal;
the conversion unit 53 is configured to receive the amplified pulse signal, and convert the amplified pulse signal into a cardiac signal by performing feature point extraction and feature point calculation on the amplified pulse signal.
Optionally, the obtaining unit 51 is further specifically configured to obtain the raw pulse signal collected by using the photoelectric pulse sensor.
Optionally, the apparatus for acquiring an electrocardiographic signal further includes a first detecting unit, configured to detect whether a signal intensity of an original pulse signal acquired by using the photoelectric pulse sensor is smaller than a first preset threshold, and if the signal intensity of the original pulse signal is smaller than the first preset threshold, adjust a light-emitting intensity of the photoelectric pulse sensor, so that the signal intensity of the original pulse signal detected by the photoelectric pulse sensor is greater than or equal to the first preset threshold.
Optionally, the apparatus for obtaining an ecg signal further includes a second detecting unit, configured to detect the signal strength of the amplified pulse signal output by the amplifying circuit unit after the original pulse signal is sent to the amplifying circuit unit, determine whether the signal strength of the amplified pulse signal is greater than a second preset threshold or smaller than a third preset threshold, and adjust the gain of the amplifying circuit unit if the signal strength of the amplified pulse signal is greater than the second preset threshold or smaller than the third preset threshold, so that the signal strength of the amplified pulse signal output by the amplifying circuit unit is greater than or equal to the third preset threshold and less than or equal to the second preset threshold.
Optionally, the transformation unit 53 is further specifically configured to extract a plurality of feature points of the amplified pulse signal; calculating the signal intensity y (n) of the electrocardiosignal of the characteristic point n by using a formula y (n) ═ 1/8[2x (n) + x (n-1) -x (n-3) -2x (n-4) ]; wherein, x (n) is the signal intensity of the nth characteristic point in the amplified pulse signal; n is an integer greater than or equal to 5.
It should be noted that, for convenience and simplicity of description, the specific working process of the above-described apparatus for acquiring an electrocardiographic signal 5 may refer to the corresponding process of the method described in fig. 1 to fig. 4, and is not described herein again.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the technical solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
Fig. 6 is a schematic structural diagram of a terminal for acquiring an electrocardiograph signal according to an embodiment of the present invention. As shown in fig. 6, the terminal 6 of this embodiment includes: a pulse signal acquisition unit 61, a control unit 62 and an amplification circuit unit 63; the pulse signal acquisition unit 61 is used for acquiring an original pulse signal; the control unit 62 is configured to obtain the original pulse wave signal acquired by the pulse signal acquisition unit 61, send the original pulse signal to the amplification circuit unit 63, and amplify the original pulse signal by the amplification circuit unit to obtain an amplified pulse signal; the control unit 62 is further configured to receive the amplified pulse signal, and convert the amplified pulse signal into a cardiac signal by performing feature point extraction and feature point calculation on the amplified pulse signal.
Optionally, the pulse signal collecting unit 61 is a photoelectric pulse sensor.
Optionally, the control unit 62 is further configured to detect whether the signal intensity of the original pulse signal is smaller than a first preset threshold, and if the signal intensity of the original pulse signal is smaller than the first preset threshold, adjust the light-emitting intensity of the photoelectric pulse sensor so that the signal intensity of the original pulse signal detected by the photoelectric pulse sensor is greater than or equal to the first preset threshold.
Optionally, the control unit 62 is further configured to detect the signal strength of the amplified pulse signal output by the amplifying circuit unit, determine whether the signal strength of the amplified pulse signal is greater than a second preset threshold or less than a third preset threshold, and if the signal strength of the amplified pulse signal is greater than the second preset threshold or less than the third preset threshold, adjust the gain of the amplifying circuit unit to enable the signal strength of the amplified pulse signal output by the amplifying circuit unit to be greater than or equal to the third preset threshold and less than or equal to the second preset threshold.
Optionally, the control unit 62 is further configured to extract a plurality of feature points of the amplified pulse signal; calculating the signal intensity y (n) of the electrocardiosignal of the characteristic point n by using a formula y (n) ═ 1/8[2x (n) + x (n-1) -x (n-3) -2x (n-4) ]; wherein, x (n) is the signal intensity of the nth characteristic point in the amplified pulse signal; n is an integer greater than or equal to 5.
Optionally, as shown in fig. 7, the terminal 6 may further include a memory 64 and a computer program 65 stored in the memory 64 and operable on the control unit 62, for example, a program for acquiring an electrocardiographic signal. The control unit 62, when executing the computer program 65, implements the steps in the above-described embodiments of the method for acquiring an electrocardiographic signal, such as the steps 101 to 103 shown in fig. 1. Alternatively, the control unit 62 implements the functions of the modules/units in the above-described device embodiments, such as the functions of the units 51 and 53 shown in fig. 5, when executing the computer program 65.
Illustratively, the computer program 65 may be partitioned into one or more modules/units that are stored in the memory 64 and executed by the control unit 62 to carry out the present invention. The one or more modules/units may be a series of computer program instruction segments capable of performing specific functions, which are used to describe the execution of the computer program 65 in the terminal 6. For example, the computer program 65 may be divided into an acquisition unit, an amplification unit, and a transformation unit (a module in a virtual device), each unit specifically functioning as follows: the acquisition unit is used for acquiring an original pulse signal; the amplifying unit is used for sending the original pulse signal to an amplifying circuit unit, and the amplifying circuit unit amplifies the original pulse signal to obtain an amplified pulse signal; the conversion unit is used for receiving the amplified pulse signals and converting the amplified pulse signals into the electrocardiosignals by carrying out feature point extraction and feature point calculation on the amplified pulse signals.
The terminal 6 may be a terminal such as a smart phone, a tablet computer, and a wearable device. It will be appreciated by those skilled in the art that fig. 6 and 7 are merely examples of the terminal 6 and do not constitute a limitation of the terminal 6, and may include more or less components than those shown, or some components may be combined, or different components, for example, the terminal may further include input output devices, network access devices, buses, etc.
The control Unit 62 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory 64 may be an internal storage unit of the terminal 6, such as a hard disk or a memory of the terminal 6. The memory 64 may also be an external storage device of the terminal 6, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card) and the like provided on the terminal 6. Further, the memory 64 may also include both an internal storage unit and an external storage device of the terminal 6. The memory 64 is used for storing the computer programs and other programs and data required by the terminal. The memory 64 may also be used to temporarily store data that has been output or is to be output.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only used for distinguishing one functional unit from another, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus/terminal and method may be implemented in other ways. For example, the above-described apparatus/terminal embodiments are merely illustrative, and for example, the division of the modules or units is only one type of logical function division, and other division manners may exist in actual implementation, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated modules/units, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, all or part of the flow of the method according to the embodiments of the present invention may also be implemented by a computer program, which may be stored in a computer-readable storage medium, and when the computer program is executed by a processor, the steps of the method embodiments described above may be implemented. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like. It should be noted that the computer readable medium may contain content that is subject to appropriate increase or decrease as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable media does not include electrical carrier signals and telecommunications signals as is required by legislation and patent practice.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (9)
1. A method of acquiring cardiac electrical signals, comprising:
acquiring an original pulse signal;
sending the original pulse signal to an amplifying circuit unit, and amplifying the original pulse signal by the amplifying circuit unit to obtain an amplified pulse signal;
receiving the amplified pulse signals, and converting the amplified pulse signals into electrocardiosignals by performing feature point extraction and feature point calculation on the amplified pulse signals;
wherein, the step of converting the amplified pulse signals into electrocardiosignals by performing feature point extraction and feature point calculation on the amplified pulse signals comprises the following steps:
extracting a plurality of feature points of the amplified pulse signal;
calculating the signal intensity y (n) of the electrocardiosignal of the characteristic point n by using a formula y (n) ═ 1/8[2x (n) + x (n-1) -x (n-3) -2x (n-4) ]; wherein, x (n) is the signal intensity of the nth characteristic point in the amplified pulse signal; n is an integer greater than or equal to 5.
2. The method of claim 1, wherein said obtaining a raw pulse signal comprises:
raw pulse signals acquired by utilizing the photoelectric pulse sensor are acquired.
3. The method of claim 2, wherein after said acquiring raw pulse signals acquired with a photoelectric pulse sensor, comprising:
detecting whether the signal intensity of the original pulse signal is smaller than a first preset threshold value, and if the signal intensity of the original pulse signal is smaller than the first preset threshold value, adjusting the luminous intensity of the photoelectric pulse sensor so that the signal intensity of the original pulse signal detected by the photoelectric pulse sensor is larger than or equal to the first preset threshold value.
4. The method according to any one of claims 1-3, wherein after said sending said original pulse signal to an amplification circuit unit, comprising:
and detecting the signal intensity of the amplified pulse signal output by the amplifying circuit unit, judging whether the signal intensity of the amplified pulse signal is greater than a second preset threshold or less than a third preset threshold, and if the signal intensity of the amplified pulse signal is greater than the second preset threshold or less than the third preset threshold, adjusting the gain of the amplifying circuit unit so that the signal intensity of the amplified pulse signal output by the amplifying circuit unit is greater than or equal to the third preset threshold and less than or equal to the second preset threshold.
5. An apparatus for acquiring an electrocardiographic signal, comprising:
an acquisition unit for acquiring an original pulse signal;
the amplifying unit is used for sending the original pulse signal to the amplifying circuit unit, and the amplifying circuit unit amplifies the original pulse signal to obtain an amplified pulse signal;
the conversion unit is used for receiving the amplified pulse signals and converting the amplified pulse signals into electrocardiosignals by carrying out feature point extraction and feature point calculation on the amplified pulse signals;
wherein, through carrying out feature point extraction and feature point calculation on the amplified pulse signals, the amplified pulse signals are converted into electrocardiosignals, and the method comprises the following steps:
extracting a plurality of feature points of the amplified pulse signal;
calculating the signal intensity y (n) of the electrocardiosignal of the characteristic point n by using a formula y (n) ═ 1/8[2x (n) + x (n-1) -x (n-3) -2x (n-4) ]; wherein, x (n) is the signal intensity of the nth characteristic point in the amplified pulse signal; n is an integer greater than or equal to 5.
6. A terminal for obtaining electrocardiosignals is characterized by comprising: the pulse signal acquisition unit, the control unit and the amplifying circuit unit;
the pulse signal acquisition unit is used for acquiring an original pulse signal;
the control unit is used for acquiring the original pulse wave signals acquired by the pulse signal acquisition unit, sending the original pulse signals to the amplification circuit unit, and amplifying the original pulse signals by the amplification circuit unit to obtain amplified pulse signals;
the control unit is also used for receiving the amplified pulse signals and converting the amplified pulse signals into electrocardiosignals by carrying out feature point extraction and feature point calculation on the amplified pulse signals;
wherein, the step of converting the amplified pulse signals into electrocardiosignals by performing feature point extraction and feature point calculation on the amplified pulse signals comprises the following steps:
extracting a plurality of feature points of the amplified pulse signal;
calculating the signal intensity y (n) of the electrocardiosignal of the characteristic point n by using a formula y (n) ═ 1/8[2x (n) + x (n-1) -x (n-3) -2x (n-4) ]; wherein, x (n) is the signal intensity of the nth characteristic point in the amplified pulse signal; n is an integer greater than or equal to 5.
7. The terminal of claim 6, wherein the pulse signal collecting unit is a photoelectric pulse sensor.
8. The terminal of claim 7,
the control unit is further configured to detect whether the signal intensity of the original pulse signal is smaller than a first preset threshold, and adjust the light-emitting intensity of the photoelectric pulse sensor if the signal intensity of the original pulse signal is smaller than the first preset threshold, so that the signal intensity of the original pulse signal detected by the photoelectric pulse sensor is greater than or equal to the first preset threshold.
9. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 4.
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