CN218304926U - 12 lead electrocardio recording device - Google Patents
12 lead electrocardio recording device Download PDFInfo
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- CN218304926U CN218304926U CN202221056980.3U CN202221056980U CN218304926U CN 218304926 U CN218304926 U CN 218304926U CN 202221056980 U CN202221056980 U CN 202221056980U CN 218304926 U CN218304926 U CN 218304926U
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Abstract
The application provides a 12 electrocardio recorder that leads belongs to electrocardio recorder technical field. This 12 electrocardio recorder that leads includes the shell that is formed by epitheca and drain pan equipment, fixedly connected with gathers the plate body on the drain pan, be provided with a plurality of gusset between drain pan and the collection plate body, be provided with the shielding lid on gathering the plate body, the shielding lid top is connected with a plurality of spliced pole, the main control board is supported in the spliced pole top. The method is beneficial to solving the problem that the main control board and the acquisition board body in the prior art are easy to heat due to direct contact, and further is beneficial to improving the R wave vertex points from a section of acquired continuous electrocardiosignal sequence in the work stability of data acquisition of the electrocardio equipment, calculating the time intervals between adjacent characteristic points, calculating the mean value of the time intervals, and obtaining the average heart rate in a certain time length by utilizing the mean value. The method can quickly and accurately obtain the heart rate value from the electrocardiosignal by automatic calculation.
Description
Technical Field
The application relates to the field of electrocardiograph recorders, in particular to a 12-lead electrocardiograph recording device.
Background
According to the statistics of the world health organization, the death rate of the cardiovascular diseases is the first in the world at present. For people with high incidence of cardiovascular diseases, long-time continuous heart monitoring can help to bring about potential risks in advance and remind patients of hospitalizing and treating in time. Among the various indices of the heart, the heart rate may most directly reflect the health status of the heart, and reflect the number of beats per minute of the heart, and too fast, too slow or irregular heart rate may reflect the potential health problems of the heart.
At present, multiple portable electrocardio devices exist in the market, the electrocardio of a user can be recorded, the heart rate is monitored, a main control board inside the existing 12-lead electrocardio recording device is directly contacted with an acquisition board or directly connected to a shell, the temperature is easy to rise rapidly when the device is used, and data acquisition is influenced; in addition, most of devices calculate the heart rate through hardware when collecting signals, and the heart rate is unstable and the fluctuation amplitude is large. The electrocardiogram signals are easy to generate baseline drift due to respiration, limb movement and the like, and are easy to be interfered by the electromyogram signals, and electrocardiogram waveforms displayed by a plurality of devices are not processed and have poor readability.
How to invent a 12-lead electrocardiogram recording device and a heart rate calculation method to improve the problems becomes a problem to be urgently solved by the technical personnel in the field.
SUMMERY OF THE UTILITY MODEL
In order to make up for the above deficiencies, the present application provides a 12-lead electrocardiographic recording device and a heart rate calculation method, which aim to solve the problems in the background art.
In a first aspect, the embodiment of the application provides a 12 lead ECG recording device, include the shell that is formed by epitheca and drain pan equipment, fixedly connected with gathers the board body on the drain pan, be provided with a plurality of gusset between drain pan and the collection board body, it is provided with the main control board to gather between board body and the epitheca, the one end of main control board is connected with power module, be connected with the button on the epitheca, be provided with the contact that corresponds with the button on the main control board, the line row needle of leading of gathering board body one end extends beyond the lateral wall of epitheca, be provided with the shielding lid on the collection board body, the shielding lid top is connected with a plurality of spliced pole, the main control board is supported in the spliced pole top.
In a specific embodiment, the power module comprises a battery compartment, two ends of the battery compartment are respectively connected with a positive contact and a negative contact, and the battery compartment is connected to one end of the main control board.
In a specific embodiment, a slot is formed in the side wall of the upper shell, the slot is opposite to the port of the battery compartment, and a battery cover is inserted into the slot.
In a specific embodiment, the upper shell is provided with a through hole corresponding to the button, the button is located outside the upper shell, and the other end of the button extends to the contact on the main control board.
In a specific implementation scheme, a lamp post is connected to one side of the upper shell, and an indicator light patch in contact with the lamp post is correspondingly arranged on the main control panel.
In a specific embodiment, the rib plate and the bottom shell are of an integrated structure, the rib plate is a plurality of plastic strips distributed in a staggered manner, and the connecting column and the shielding cover are of an integrated structure.
In a specific embodiment, the upper shell is covered with a faceplate.
In a second aspect, the application discloses a heart rate calculation method, including the above 12-lead electrocardiograph recording apparatus, further including the following steps:
step 1: the filter algorithm is designed by adopting a Butterworth filter, the conversion of the cut-off frequency of the filter is realized by firstly calculating the ratio M of the cut-off frequency of the filter to be designed to the cut-off frequency of a reference filter and then removing all element values in the filter by the M, and the calculation formula is as follows: m = cut-off frequency of the filter to be designed/cut-off frequency of the reference filter;
transfer function of butterworth filter:
wherein n is the order of the filter;
ω c = cut-off frequency = frequency at which the amplitude drops to-3 db;
ω p = passband edge frequency;
the filtering process may be understood as a process of solving the Chang Jishu linear difference equation, in the form:
wherein, the x (n) sequence is a signal sequence before filtering, ak and bi are a system array of a denominator and a numerator of an H (z) system function, and the solved y (n) is the signal sequence after filtering;
note: x (n) and y (n) are of equal length, and a 0 ＝1；
The formula is simplified as follows:
and 2, step: the R wave detection algorithm is used for filtering an electrocardiosignal S1 of a certain lead through a filtering algorithm to obtain filtered data S2, selecting a signal ST within a period of time T from the filtered data S2 as a sample, accurately identifying all R waves of the ST, and then obtaining a heart rate value according to the time interval of adjacent R waves;
and based on the needle shape state of the R wave of the electrocardiosignal, detecting the R wave by adopting an aspect ratio method, and further calculating the heart rate.
The method comprises the following steps:
a: finding all peak points and valley points, and recording positions and corresponding amplitude values;
b: and then calculating the aspect ratio of all the peaks, valleys and other points in sequence according to a formula, and recording the positions and the corresponding aspect ratios. The aspect ratio is calculated as follows:
the first valley point is P 0 Of amplitude P 0 f; peak point is P 1 Of amplitude P 1 f; the second valley point is P 2 Of amplitude P 2 f, calculating the height-width ratio formula as follows:
c: sorting according to the aspect ratio, and sorting corresponding positions;
d: the magnitude of the height-width ratio is obtained, and then the height-width ratio with proper magnitude and the corresponding position are selected as R-wave candidate positions according to the heart rate range; the heart rate range of the 12-lead electrocardiograph recorder is 30-300bpm;
e: screening the positions to be selected according to the RR cycles corresponding to the heart rate range, and leaving the positions to be selected as the R waves to be found;
and step 3: calculating heart rate, recording all R wave positions of the found ST, recording the number as N and the positions as R i I =1,2, …, N, and the sampling rate of the single lead electrocardiograph is SampleRate;
a: calculating all RR intervals in the T time period and recording as RRi;
RR i ＝R i+1 -R i i＝1，2，...N-1；
b: the average value of the RR intervals is calculated, and the formula is as follows:
c: calculating the heart rate HR in the T time period by combining the sampling frequency, wherein the formula is as follows:
the average heart rate within a certain time span can be obtained by using the average value.
The application provides a 12-lead electrocardiogram recording device and a heart rate calculation method, which have the following beneficial effects:
1. through the design of the rib plate, the contact area between the acquisition plate body and the bottom shell is greatly reduced, and the acquisition plate body is not easy to heat;
2. through the design of the connecting column, the main control board and the acquisition board body do not need to be in direct contact with each other, so that the problem that the main control board and the acquisition board body in the prior art are easy to heat due to direct contact is solved, and the stable data acquisition of the electrocardio equipment is facilitated;
3. according to the method, R wave top points are extracted from a section of continuous electrocardiosignal sequence, time intervals between adjacent characteristic points are calculated, the mean value of the time intervals is calculated, and the mean value can be used for obtaining the average heart rate within a certain time length. The method can quickly and accurately automatically calculate the heart rate value from the electrocardiosignals.
Drawings
In order to more clearly explain the technical solutions of the embodiments of the present application, the drawings that are required 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 application and therefore should not be considered as limiting the scope, and that for those skilled in the art, other related drawings can be obtained from these drawings without inventive effort.
FIG. 1 is a schematic structural diagram of a 12-lead electrocardiographic recording device according to an embodiment of the present application;
FIG. 2 is a schematic diagram of an upper case structure provided in an embodiment of the present application;
fig. 3 is a schematic diagram of a main control board structure provided in an embodiment of the present application;
fig. 4 is a schematic structural diagram of a collecting plate body provided in an embodiment of the present application;
fig. 5 is a schematic view of a bottom case structure provided in the present embodiment;
fig. 6 is a schematic structural diagram of a slot according to an embodiment of the present disclosure;
FIG. 7 is a schematic perspective view of an embodiment of the present disclosure;
fig. 8 is a flowchart of a heart rate calculation method according to an embodiment of the present disclosure.
In the figure: 1-a panel; 2-a button; 3-upper shell; 4-lamp pole; 5-a battery compartment; 6-positive electrode contact; 7-a negative contact; 8, a main control board; 9-battery cover; 10-collecting plate body; 11-a shielding cover; 12-a bottom shell; 13-a slot; 14-connecting column; 15-rib plate.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.
To make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application.
Thus, the following detailed description of the embodiments of the present application, as presented in the figures, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and thus should not be considered limiting.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
Referring to fig. 1-7, the present application provides a 12-lead electrocardiograph recording device, which includes an outer casing assembled by an upper casing 3 and a bottom casing 12, wherein in some embodiments, the upper casing 3 and the bottom casing 12 are fixed by screws. The collecting plate is characterized in that the collecting plate body 10 is fixedly connected to the bottom shell 12, a plurality of rib plates 15 are arranged between the bottom shell 12 and the collecting plate body 10, the rib plates 15 and the bottom shell 12 are of an integrated structure, and injection molding can be particularly adopted. The rib plates 15 are a plurality of plastic strips distributed in a staggered mode, through the design of the rib plates 15, the contact area between the collecting plate body 10 and the bottom shell 12 is greatly reduced, and the collecting plate body 10 is not prone to heating.
Gather and be provided with main control board 8 between board body 10 and the epitheca 3, the one end of main control board 8 is connected with power module, be connected with button 2 on the epitheca 3, be provided with the contact that corresponds with button 2 on the main control board 8, the line pin of leading of gathering board body 10 one end extends beyond the lateral wall of epitheca 3, be provided with shield cover 11 on the board body 10 of gathering, shield cover 11 top is connected with a plurality of spliced pole 14, main control board 8 is supported in spliced pole 14 top, spliced pole 14 with shield cover 11 formula structure as an organic whole, the connection back of wire winding displacement has been done. A shield cover 11 is mounted over the acquisition board 10. Through the design of this spliced pole 14, also need not direct contact between main control board 8 and the collection board body 10, be favorable to improving the problem that main control board 8 and collection board body 10 direct contact generate heat easily among the prior art, and then help electrocardio equipment data acquisition's job stabilization.
Referring to fig. 3, the power module includes a battery compartment 5, two ends of the battery compartment 5 are respectively connected to a positive contact 6 and a negative contact 7, the battery compartment 5 is connected to one end of the main control board 8, a slot 13 is formed in a side wall of the upper case 3, the slot 13 is opposite to a port of the battery compartment 5, and a battery cover 9 is inserted into the slot 13.
The upper casing 3 is provided with a through hole corresponding to the button 2, the button 2 is positioned outside the upper casing 3, and the other end of the button 2 extends to a contact on the main control board 8.
One side of the upper shell 3 is connected with a lamp post 4, an indicator light patch in contact with the lamp post 4 is correspondingly arranged on the main control panel 8, and the lamp post 4 is fixed on the side face of the upper shell 3. The main control board 8 is fixed to the upper case 3. The indicator light paster of the main control panel 8 is contacted with the lamp post 4, and the integral indicator light function of the equipment is realized.
It should be noted that the upper shell 3 is covered with the panel 1, and the panel 1 is fixed by an adhesive means.
Referring to fig. 8, the present application further discloses a heart rate calculation method, including the 12-lead electrocardiograph recording apparatus described above, further including the following steps:
step 1: the filtering algorithm provides a baseline drift filtering algorithm, a myoelectric interference filtering algorithm and a power frequency interference filtering algorithm aiming at interference factors borne by electrocardiosignals. The application adopts a Butterworth filter to design a filtering algorithm. The butterworth filter is characterized by a frequency response curve in the pass band that is maximally flat with no fluctuations, and gradually drops to zero in the stop band. On the bode plot of the logarithm of the amplitude against the angular frequency, starting from a certain boundary angular frequency, the amplitude decreases gradually with increasing angular frequency, tending to minus infinity. The Butterworth filter is adopted to design a filtering algorithm, the conversion of the cut-off frequency of the filter is realized by firstly calculating the ratio M of the cut-off frequency of the filter to be designed to the cut-off frequency of a reference filter and then removing all element values in the filter by the M, and the calculation formula is as follows: m = cut-off frequency of the filter to be designed/cut-off frequency of the reference filter;
transfer function of butterworth filter:
wherein n is the order of the filter;
ω c = cut-off frequency = frequency at which the amplitude drops to-3 db;
ω p = passband edge frequency;
the filtering process may be understood as a process of solving the Chang Jishu linear difference equation, in the form:
wherein, the x (n) sequence is a signal sequence before filtering, ak and bi are a system array of a denominator and a numerator of an H (z) system function, and the solved y (n) is the signal sequence after filtering;
note: x (n) and y (n) are of equal length, and a 0 ＝1；
The formula is simplified as follows:
as a default condition, when k < 0, x (k), y (k) are both 0.
In the present application, the baseline wander filtering algorithm is implemented by a high pass filter with cut-off frequencies of 0.05HZ, 0.15HZ and 0.3HZ. The electromyographic interference filtering algorithm is realized by a low-pass filter, and the cut-off frequencies are 25HZ, 35HZ and 150HZ. The power frequency interference filter is realized by a band elimination filter, and the power frequency interference of 50HZ and 60HZ is filtered.
And 2, step: the R wave detection algorithm is used for filtering an electrocardiosignal S1 of a certain lead through a filtering algorithm to obtain filtered data S2, the signal ST within a period of time T is selected from the filtered data S2 to serve as a sample, all R waves of the ST are accurately identified, and then a heart rate value is obtained according to the time interval of adjacent R waves;
and based on the needle shape state of the R wave of the electrocardiosignal, detecting the R wave by adopting an aspect ratio method, and further calculating the heart rate.
The method comprises the following steps:
a: finding all peak points and valley points, and recording positions and corresponding amplitude values;
b: and then calculating the aspect ratio of all the peaks, valleys and other points in sequence according to a formula, and recording the positions and the corresponding aspect ratios. The aspect ratio is calculated as follows:
the first valley point is P 0 Of amplitude P 0 f; peak point is P 1 Of amplitude P 1 f; the second valley point is P 2 Of amplitude P 2 f, calculating the height-width ratio formula as follows:
c: sorting according to the aspect ratio, and sorting corresponding positions;
d: the magnitude of the height-width ratio is obtained, and then the height-width ratio with proper magnitude and the corresponding position are selected as the R-wave candidate position according to the heart rate range; the heart rate range of the 12-lead electrocardiograph recorder is 30-300bpm;
e: screening the positions to be selected according to the RR periods corresponding to the heart rate range, and leaving the positions to be selected as R waves to be found;
and step 3: calculating heart rate for all found STRecording the R wave position, recording the number as N and the position as R i I =1,2, …, N, and the sampling rate of the single lead electrocardiograph is SampleRate;
a: calculating all RR intervals in the T time period and recording as RRi;
RR i ＝R i+1 -R i i＝1，2，...N-1；
b: calculating the average value of RR intervals, and the formula is as follows:
c: and calculating the heart rate HR in the T time period by combining the sampling frequency, wherein the formula is as follows:
the average heart rate within a certain time span can be obtained by using the average value.
According to the method, R wave top points are extracted from a section of continuous electrocardiosignal sequence, time intervals between adjacent characteristic points are calculated, then the mean value of the time intervals is calculated, and the mean value can be used for obtaining the average heart rate within a certain time length. The method can quickly and accurately obtain the heart rate value from the electrocardiosignal by automatic calculation.
In other embodiments, the 12 leads include 6 limb leads (I, II, III, aVR, aVL, aVF) and 6 chest leads (V1-V6). Limb leads include standard bipolar leads (I, II and III) and compression leads (aVR, aVL and aVF). Bipolar leads are named for recording the voltage difference between two electrodes.
The lead wire on the equipment is worn on the corresponding position of the human body according to the standard, and when the lead wire falls off or the connection is loosened, the equipment can alarm and remind. After the wearable electrocardiosignal acquisition device is worn, the electrocardiosignal acquisition device can acquire electrocardiosignals, carry out multistage amplification, analysis and processing on weak electrocardiosignals, convert the weak electrocardiosignals into digital signals, send the digital signals to a single chip microcomputer and transmit the digital signals to an upper computer in a wireless (Bluetooth) mode. The upper computer receives the data, performs filtering and other processing, displays 12-lead electrocardiographic waveforms and the like in real time, calculates parameters such as heart rate and the like for a user to observe, and stores the data on the server for calling at any time. The device well realizes a series of functions of dynamic acquisition, storage, display, data transmission and the like of the electrocardio data.
The equipment is by two No. 5 battery power supplies, and it is convenient to dismantle, but ordinary dry battery continuous use more than 4h, has bluetooth state instruction and low-power warning. The equipment is provided with a power-on key and a function key, and the power-on key is used for short-time power on and long-time power off; the Bluetooth name can be changed by the function key, and the operation is simple. The equipment has light weight, small volume, convenient carrying and strong applicability.
It should be noted that equipment power module is two No. 5 batteries, and it is convenient to dismantle, and ordinary dry battery can use more than 4h in succession, has bluetooth status indication and low-battery to remind. The equipment is provided with a power-on key and a function key, and the power-on key is used for short-time power on and long-time power off; the Bluetooth name can be changed by the function key, and the operation is simple. The equipment is light in weight, small in size, convenient to carry and strong in applicability.
In addition, in other embodiments, this application can also cooperate the electrocardiograph APP that leads to use, mainly carries out the bluetooth with 12 electrocardiographs that lead and is connected, receives the electrocardio data that 12 lead electrocardiographs uploaded, through the display of self-defined page, shows electrocardiographic waveform, heart rate data information in real time.
At first through the user name, the password logs in APP, click the bluetooth option button, get into bluetooth equipment selection page, select the bluetooth, APP automatic connection bluetooth, carry out bluetooth data communication, APP receives 12 electrocardio equipment that leads and passes through the electrocardio data that the bluetooth uploaded, carry out data decryption, the operation such as recombination, data encapsulation, real-time dynamic display is to the APP page, click through the button and can switch 2x6, 3x4, 1x12 display mode, give the most audio-visual 12 ECG demonstration of leading of patient, through button selection, can carry out low pass, the high pass, power frequency filtering to real-time electrocardio data, with electrocardio data recombination, transmit for heart rate algorithm, calculate current real-time heart rate information, and show the APP page in real time. Click and save the button, APP gets into 10S count down, begins to record the electrocardio data information in the 10S, after 10S count down, APP can automatic generation 10S electrocardio information' S PDF document, saves on the Pad SD card, can supply patient or this medical personnel to print, makes corresponding diagnosis report, and simple to use facilitates the operation, and interface data is understandable.
The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (7)
1. The utility model provides a 12 electrocardio recorder that leads, includes the shell that is formed by equipment of epitheca (3) and drain pan (12), its characterized in that, fixedly connected with gathers plate body (10) on drain pan (12), be provided with a plurality of gusset (15) between drain pan (12) and the collection plate body (10), it is provided with main control board (8) to gather between plate body (10) and epitheca (3), the one end of main control board (8) is connected with power module, be connected with button (2) on epitheca (3), be provided with the contact that corresponds with button (2) on main control board (8), the line of leading of gathering plate body (10) one end arranges the needle and extends to outside the lateral wall of epitheca (3), be provided with shielding lid (11) on the collection plate body (10), shielding lid (11) top is connected with a plurality of spliced pole (14), main control board (8) are supported in spliced pole (14) top.
2. The 12-lead electrocardiographic recording device according to claim 1, wherein the power module comprises a battery compartment (5), two ends of the battery compartment (5) are respectively connected with a positive contact (6) and a negative contact (7), and the battery compartment (5) is connected to one end of the main control board (8).
3. A 12-lead electrocardiographic recording device according to claim 2, characterized in that a slot (13) is provided on the side wall of the upper case (3), the slot (13) is opposite to the port of the battery compartment (5), and a battery cover (9) is inserted into the slot (13).
4. A 12-lead ecg recording device according to claim 1, wherein the upper case (3) is provided with a through hole corresponding to the button (2), the button (2) is located outside the upper case (3), and the other end of the button (2) extends to a contact point on the main control board (8).
5. The 12-lead electrocardiographic recording device according to claim 1, wherein a lamp post (4) is connected to one side of the upper case (3), and an indicator light patch in contact with the lamp post (4) is correspondingly arranged on the main control board (8).
6. The 12-lead electrocardiographic recording device according to claim 1, wherein the rib plate (15) and the bottom shell (12) are of an integral structure, the rib plate (15) is a plurality of plastic strips distributed in a staggered manner, and the connecting column (14) and the shielding cover (11) are of an integral structure.
7. The 12-lead electrocardiographic recording device according to claim 1, characterized in that the upper shell (3) is covered with a panel (1).
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