CN209808334U - Heart sound and electrocardio synchronous measuring probe and device - Google Patents
Heart sound and electrocardio synchronous measuring probe and device Download PDFInfo
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- CN209808334U CN209808334U CN201821855991.1U CN201821855991U CN209808334U CN 209808334 U CN209808334 U CN 209808334U CN 201821855991 U CN201821855991 U CN 201821855991U CN 209808334 U CN209808334 U CN 209808334U
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Abstract
A heart sound and electrocardio synchronous measuring probe comprises N electrocardio electrodes for acquiring electrocardiosignals and a sound sensor for acquiring the heart sound signals; wherein N is a natural number greater than or equal to 3; the surface of the sound sensor contacted with the human body is arranged on the upper surface of the heart sound electrocardio synchronous measuring probe; the electrocardio-electrodes are arranged at the periphery of the sound sensor, and the surface of the electrocardio-electrodes contacted with the human body is arranged on the upper surface of the electrocardio-synchronous measuring probe. An attitude sensor for acquiring the attitude of the heart sound electrocardio synchronous measuring probe is arranged below the sound sensor. Through the design of the heart sound and electrocardio synchronous measuring probe, the heart sound and electrocardio synchronous measuring device and method are simplified, the problem that the heart sound and electrocardio signals are difficult to synchronize in the moving process of the electronic stethoscope is avoided, and an external electrocardio cable is not needed; the process of obtaining the standard lead electrocardiosignal is quicker, and the standard lead electrocardiosignal can be quickly synchronized with the heart sound signal.
Description
Technical Field
The utility model relates to the technical field of medical equipment, concretely relates to heart sound electrocardio synchronization measurement probe, device and method.
Background
Stethoscopes are common medical instruments used in modern clinical surgery, intensive care, emergency and outpatient applications. The traditional stethoscope is difficult to capture weak but very important heart sound components emitted by internal organs of a human body, so that doctors cannot make accurate diagnosis in time, and the diagnosis basis is more dependent on experience of the doctors and the auscultation technology, so that the traditional stethoscope has great defects in accuracy, repeatability and the like.
The digitalized electronic stethoscope in the prior art overcomes some defects of the traditional stethoscope, and can convert the collected heart sound signals to the time domain for analysis and disease diagnosis. The heart sound signals collected by the prior art electronic stethoscope include a first heart sound signal and a second heart sound signal, as shown by the lower heart sound signal waveform in fig. 2. When the stethoscope is placed at different positions for auscultation, the difference between the sound amplitudes of the first heart sound signal and the second heart sound signal collected by the electronic stethoscope is not large, and it is generally difficult to determine the heart activities corresponding to the first heart sound signal and the second heart sound signal. So that the use and the popularization of the electronic stethoscope are limited.
The electrocardiogram can reflect the electrical activity process of the heart and has important reference value for heart diseases such as arrhythmia, conduction disorder, myocardial infarction and the like. Because the electrocardio signal and the heart sound signal both occur in the contraction and relaxation process of the heart, the two signals have corresponding relation in the time domain, and the corresponding relation is shown in fig. 2. Typically, the first and second cardiac signal correspond to waveform timing of a standard two lead acquired cardiac signal response, respectively. Therefore, by means of the synchronous relation between the positive electrocardiosignal or the electrocardiosignal of the standard lead and the heart sound signal, if the electrocardiosignal of the QRS wave can be accurately identified, the position of the first heart sound signal can be accurately determined, and the first heart sound signal and the second heart sound signal can be accurately identified. In the prior art, some electronic stethoscopes capable of measuring electrocardiosignals only have 1 to 2 electrocardio electrodes which are generally used for acquiring the electrocardiosignals, so that the acquired electrocardiosignals have waveform shape change and drift in the moving process of the electronic stethoscopes and can not be used for time sequence synchronization of the electrocardiosignal.
In order to realize the acquisition of standard electrocardio signals, some electronic stethoscopes capable of measuring electrocardio signals in the prior art are provided with an external electrocardio cable, an electrocardio electrode is attached to the body of a patient, the electrode is connected with the electronic stethoscopes through an electrocardio lead wire, the use of equipment is complex, the efficiency is low, and electrocardio signals cannot be quickly and simultaneously acquired.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in avoiding above-mentioned technical scheme not enough, and has proposed a probe, device and method that can carry out heart sound electrocardio synchronous measurement fast, has avoided the line of leading between electrocardioelectrode piece and the electronic stethoscope, has also avoided the problem that the heart sound and the electrocardiosignal of electronic stethoscope in the position shift process can not be synchronous, can obtain the fine heart sound of synchronism and electrocardiosignal. The technical scheme adopted by the utility model for solving the technical problems is a heart sound and electrocardio synchronous measuring probe, which comprises N electrocardio electrodes for acquiring electrocardiosignals and a sound sensor for acquiring heart sound signals; wherein N is a natural number greater than or equal to 3; the surface of the sound sensor contacted with the human body is arranged on the upper surface of the heart sound electrocardio synchronous measuring probe; the electrocardio-electrodes are arranged at the periphery of the sound sensor, and the surface of the electrocardio-electrodes contacted with the human body is arranged on the upper surface of the electrocardio-synchronous measuring probe.
The heart sound and electrocardio synchronous measuring probe also comprises an attitude sensor used for acquiring the attitude of the heart sound and electrocardio synchronous measuring probe; the attitude sensor is arranged in the heart sound electrocardio synchronous measuring probe below the sound sensor.
The attitude sensor is a three-axis acceleration sensor.
The number of the electrocardio-electrodes is 12, and the 12 electrocardio-electrodes are uniformly distributed on the periphery of the sound sensor at equal intervals by taking the sound sensor as the center.
The utility model solves the technical problem the technical scheme who adopts can also be a heart sound electrocardio synchronous measuring device based on above-mentioned heart sound electrocardio synchronous measuring probe, including the heart sound electrocardio synchronous measuring probe who is used for gathering heart sound electrocardiosignal, the analog amplification circuit that is used for heart sound electrocardiosignal analog amplification, the analog-to-digital conversion circuit that is used for carrying out analog-to-digital conversion with the heart sound electrocardiosignal of gathering and the main control circuit that is used for heart sound electrocardio synchronous measuring device control; the heart sound and electrocardio synchronous measuring probe is electrically connected with the analog amplifying circuit, the analog amplifying circuit is electrically connected with the analog-to-digital conversion circuit, the analog-to-digital conversion circuit is electrically connected with the main control circuit, and the main control circuit is electrically connected with the heart sound and electrocardio synchronous measuring probe; the main control circuit is used for controlling the on-off of each electrocardio electrode in the heart sound electrocardio synchronous measuring probe.
The heart sound and electrocardio synchronous measuring device also comprises a wireless transmission circuit for wireless transmission of electrocardio and heart sound signals and a power amplifier output circuit for outputting the heart sound signals; the wireless transmission circuit is electrically connected with the main control circuit, and the power amplifier output circuit is electrically connected with the main control circuit.
The utility model provides a technical scheme that technical problem adopted can also be a heart sound electrocardio synchronous measurement method based on above-mentioned heart sound electrocardio synchronous measurement device, including following step: step A10: acquiring electrocardiosignals by each electrocardio electrode in the heart sound and electrocardio synchronous measuring probe and transmitting the electrocardiosignals to the main control circuit; step A20: the main control circuit performs difference operation on the electrocardiosignals according to the electrocardiosignals obtained in the step A10, and selects and obtains standard lead electrocardiosignals according to the difference operation result; step A30: the main control circuit outputs heart sound and electrocardio synchronous signals according to the obtained standard lead electrocardio signals.
The utility model provides a technical scheme that technical problem adopted can also be a heart sound electrocardio synchronous measurement method based on above-mentioned heart sound electrocardio synchronous measurement device, including following step: step B10: arranging an attitude sensor for acquiring the attitude of the heart sound electrocardio synchronous measuring probe in the heart sound electrocardio synchronous measuring probe; the attitude sensor is arranged in the heart sound electrocardio synchronous measuring probe below the sound sensor; step B20: an attitude sensor in the heart sound and electrocardio synchronous measuring probe acquires attitude information of the heart sound and electrocardio synchronous measuring probe and transmits the attitude information to the main control circuit; step B30: b20, selecting electrocardiosignals obtained by 3 electrocardio electrodes by the main control circuit according to the attitude information obtained in the step B20 to calculate and obtain standard lead electrocardiosignals; step B40: the main control circuit outputs heart sound and electrocardio synchronous signals according to the obtained standard lead electrocardio signals.
The utility model provides a technical scheme that technical problem adopted can also be a heart sound electrocardio synchronous measurement method based on above-mentioned heart sound electrocardio synchronous measurement device, including following step: step C10: arranging an attitude sensor for acquiring the attitude of the heart sound electrocardio synchronous measuring probe in the heart sound electrocardio synchronous measuring probe; the attitude sensor is arranged in the heart sound electrocardio synchronous measuring probe below the sound sensor; the attitude sensor is a three-axis acceleration sensor; step C20: an attitude sensor, namely a three-axis acceleration sensor, samples and obtains acceleration values in three axis directions and transmits the acceleration values to a main control circuit; step C30: the main control circuit calculates the offset angle of the heart sound electrocardio synchronous measuring probe relative to the human body measuring contact surface according to the acceleration value in the three-axis direction obtained in the step C20; step C40: the main control circuit searches a bias angle and an electrocardio-electrode corresponding table pre-stored in the main control circuit according to the bias angle of the heart sound electrocardio-synchronous measuring probe obtained by calculation, and 3 electrocardio-electrodes for electrocardiosignal acquisition are obtained by searching the table; step C50: after acquiring the electrocardio-electrodes according to a look-up table, calculating the electric signals acquired from the corresponding electrocardio-electrodes to acquire standard lead electrocardio-signals; step C60: the main control circuit outputs heart sound and electrocardio synchronous signals according to the obtained standard lead electrocardio signals.
In the above method for measuring heart sound and electrocardiogram synchronously, step C10 includes the following steps: step C11: at the periphery of the sound sensor, centering on the sound sensorThe central angle of the circle is uniformly provided with 12 electrocardio-electrodes which are respectively marked as A ~ L electrodes, and in the initialized state, the A ~ L electrode corresponds to the circle with the central angle as the center and the sound sensor as the center、、、、、、、、、、、(ii) a Step C30 includes the following steps: step C31: calculating the deflection angle of the attitude sensor relative to the original positionIf, ifLet us orderWhereinn is an integer; step C40 includes the following steps: step C41: angle of deflection according to step C31Firstly, selecting LA electrode for standard lead electrocardiosignal calculation, and recording the central angle of LA electrode relative to A electrode as，(ii) a Step C42: determining an RA electrode according to an LA electrode, wherein the RA electrode and the LA electrode are opposite surfaces, and the opposite included angle of the RA electrode and the LA electrode is 180 degrees; if the bias angle of the LA electrode with respect to the central axis direction isThe bias angle of the LA electrode with respect to the direction of the central axis isSince the central angle of all normalized electrode positions is within 360 degrees, the method can be used for the measurement of the electrode positionWhen the temperature of the water is higher than the set temperature,(ii) a When in useWhen the temperature of the water is higher than the set temperature,(ii) a ByConfirming the RA electrode; step C43: confirming RL electrode according to RA electrode, selecting the first electrode at the right of RA electrode as reference, soBy passingThe RL electrode is defined.
Compared with the prior art, the beneficial effects of the utility model are that: 1. through the design of the probe for synchronously measuring the heart sound and the heart electricity, the device and the method for synchronously measuring the heart sound and the heart electricity are simplified, the problem that the heart sound and the heart electricity signals cannot be synchronous in the moving process of the electronic stethoscope is avoided, and an external electrocardiocable is not needed; 2. by arranging the attitude sensor, the process of acquiring the standard lead electrocardiosignals is quicker, so that synchronous operation can be quickly carried out on the electrocardiosignals and the heart sound signals on the algorithm.
Drawings
FIG. 1 is a schematic structural diagram of a heart sound and electrocardio synchronous measuring probe;
FIG. 2 is a schematic diagram of the synchronous timing sequence of a cardiac signal and a standard lead ECG signal, wherein the ECG signal is the standard lead ECG signal;
FIG. 3 is a schematic diagram of three axes of the three-axis acceleration sensor when horizontally attached to the measurement interface;
fig. 4 to 6 are schematic views of three axes directions of a three-axis acceleration sensor when the three-axis acceleration sensor is attached to a measurement interface in a measurement state;
FIG. 7 is a schematic block diagram of a system of a heart sound electrocardio-synchronous measuring device;
FIG. 8 is a schematic flow chart diagram of a preferred embodiment of a heart sound electrocardio-synchronization measuring method;
fig. 9 is a schematic working flow diagram of the heart sound electrocardio-synchronous measuring device.
Detailed Description
The following detailed description of embodiments of the present invention will be made with reference to the accompanying drawings.
In the embodiment of the probe for measuring heart sound and electrocardio synchronously shown in fig. 1, the probe comprises N electrocardio electrodes for acquiring electrocardiosignals and a sound sensor for acquiring heart sound signals; wherein N is a natural number greater than or equal to 3; the surface of the sound sensor, which is used for contacting with a human body, is arranged on the upper surface of the heart sound electrocardio synchronous measuring probe; the electrocardio-electrodes are arranged at the periphery of the sound sensor, and the surface of each electrocardio-electrode, which is used for being contacted with a human body, is arranged on the upper surface of the electrocardio-synchronous measuring probe.
In the embodiment of the heart sound and electrocardiogram synchronous measurement probe shown in fig. 1, the apparatus further comprises an attitude sensor for acquiring the attitude of the heart sound and electrocardiogram synchronous measurement probe; the attitude sensor is arranged in the heart sound electrocardio synchronous measuring probe below the sound sensor. The attitude sensor is a three-axis acceleration sensor.
In the embodiment of the heart sound and electrocardio synchronous measuring probe shown in fig. 1, the number of the electrocardio electrodes is 12, and the 12 electrocardio electrodes are uniformly distributed on the periphery of the sound sensor at equal intervals by taking the sound sensor as the center.
In the embodiment of the heart sound and electrocardio synchronous measuring probe shown in fig. 1, the probe mainly comprises three parts. One is the attitude sensor with the number 2 positioned at the center, one is the piezoelectric film acoustic sensor with the number 3 positioned above the attitude sensor, and one is the metal electrocardio-electrode with the number 1. The sound sensor can be a piezoelectric film sensor, the piezoelectric film sensor is embedded in the middle position of the heart sound and electrocardio synchronous measuring probe, the heart sound signals can be collected through the rubber layer on the surface of the piezoelectric film sensor, and the vibration of the rubber layer is caused by the vibration of the heart, so that the transmission of sound is realized, and the sound signals are converted into electric signals. The piezoelectric film acoustic sensor is arranged in the center of the heart sound electrocardio synchronous measuring probe, and a part with the reference number 3 in figure 1 only shows a rubber layer on the acoustic sensor.
Twelve conductive electrocardio-electrode plates are embedded around the piezoelectric film sensor, so that the electrocardio-signals of the detected part can be acquired in real time. The twelve electrocardioelectrode plates can be conductive metal plates or electrocardioelectrode plates made of other materials. The attitude sensor is arranged at the bottom of the heart sound and electrocardio synchronous measuring probe and is used for positioning the position of the heart sound and electrocardio synchronous measuring probe relative to the measuring binding surface, and three electrodes which can measure the most obvious electrocardiosignals are selected as the electrodes for measuring the electrocardio by combining the attitude algorithm. The heart sound and electrocardio synchronous measuring probe is a key component forming the heart sound and electrocardio synchronous measuring device.
As shown in figure 1, 12 electrocardio-electrodes are provided, the number of which is A ~ L, the 12 electrocardio-electrodes are uniformly surrounded around the piezoelectric film acoustic sensor and are embedded in the insulation structure of the main body of the heart sound and electrocardio synchronous measuring probe, the included angle of the circle centers of the metal electrode plates is 30 degrees, the A-L12 electrode plates are uniformly distributed on the 360-degree circular surface, the vertical direction is 0 degree as the start, and the angle of the circle center corresponding to the A ~ L electrode is 0 degree to 270 degrees.
The electrocardio-electrode is attached to the measuring surface of the human body surface to be measured during measurement, when the electrocardio-synchronous measuring probe is placed at an auscultation part, the electrocardio-signal is obtained by selecting three metal electrodes, and the standard lead electrocardio-signal is obtained by calculating the signals obtained by the three electrodes and is used as the synchronous reference signal of the electrocardio-signal.
As shown in fig. 1, the height of the metal electrode plate is consistent with the height of the rubber layer of the piezoelectric film acoustic sensor, i.e. the upper surface is on the same plane, so that all the electrode plates and the rubber layer of the piezoelectric film acoustic sensor can be in good contact with the measuring surface during measurement. The heart sound and electrocardio synchronous measuring probe main body can be welded on the circuit board, and the heart sound and electrocardio synchronous measuring probe can be directly taken up when in measurement, and the heart sound and electrocardio synchronous measuring probe is opposite to the heart auscultation part. The angle of the heart sound electrocardio synchronous measuring probe relative to the measuring surface is positioned by combining the attitude sensor, and three electrocardio metal electrodes with the most obvious electrocardiosignal characteristics are gated and measured.
The main body of the heart sound and electrocardio synchronous measuring probe without the electrode plate is made of an electrically insulating material, so that the interference and influence on the electrode can be avoided when the electrocardiosignal is measured. The bottom that is located sound sensor is a very small attitude sensor, and the effect of this sensor is, need not adjust mechanical device's direction by accident at the actual measurement in-process, the utility model discloses an attitude sensor accurate positioning device's angle is accurate through reasonable algorithm finds the three most obvious metal electrodes of component measurement electrocardiosignal characteristic.
Fig. 7 shows an embodiment of a heart sound and electrocardiogram synchronous measuring device, which includes a heart sound and electrocardiogram synchronous measuring probe for collecting heart sound and electrocardiogram signals, an analog amplifying circuit for analog amplifying of the heart sound and electrocardiogram signals, an analog-to-digital converting circuit for analog-to-digital converting the collected heart sound and electrocardiogram signals, and a main control circuit for controlling the on-off of each electrocardiogram electrode in the heart sound and electrocardiogram synchronous measuring probe; the heart sound and electrocardio synchronous measuring probe is electrically connected with the analog amplifying circuit, the analog amplifying circuit is electrically connected with the analog-to-digital conversion circuit, the analog-to-digital conversion circuit is electrically connected with the main control circuit, and the main control circuit is electrically connected with the heart sound and electrocardio synchronous measuring probe.
Fig. 7 shows an embodiment of a heart sound and electrocardio-synchronous measuring device, which further comprises a wireless transmission circuit for wireless transmission of the electrocardio-heart sound signals and a power amplifier output circuit for outputting the heart sound signals; the wireless transmission circuit is electrically connected with the main control circuit, and the power amplifier output circuit is electrically connected with the main control circuit.
In the embodiment of the heart sound and electrocardio synchronous measuring device shown in fig. 7, the heart sound and electrocardio synchronous measuring device comprises a heart sound and electrocardio synchronous measuring probe, a heart sound, an electrocardio amplifying assembly and a digitalizing and main controlling assembly, wherein the heart sound and electrocardio amplifying assembly and the digitalizing and main controlling assembly are necessary components for forming the integrated heart sound and electrocardio synchronous detecting device.
When the heart sound and electrocardio synchronous measuring probe is statically arranged at an auscultation position during measurement, firstly, a required electrocardio electrode switch is started according to the angle of the heart sound and electrocardio synchronous measuring probe relative to the gravity direction, and an electrocardiosignal on an electrocardio electrode with the most obvious electrocardiosignal amplitude is extracted.
The angular scaling of the attitude sensor becomes critical. The schematic diagrams of the three-axis directions of the three-axis acceleration sensor according to fig. 4 to 6 are illustrated when the measurement interface is horizontally attached. FIG. 4 is a schematic view of three axes of orientation when the measurement interface is horizontally attached; the three-axis acceleration sensor X, Y, Z has three axes of acceleration ranging between-g and g. If the device is standing horizontally, the gravity component in the direction of X, Y is 0g, and the gravity component in the direction of the Z-axis is g.
If the three axes of the three-axis acceleration sensor have some included angles with the horizontal directionThe three-axis directions are schematically shown in fig. 4 to 6, and the gravity acceleration is shown in each axis component; as can be seen from the angle diagrams in figures 4 to 6,，，(ii) a The component of g on each axis is:，,(ii) a ByAnd、and、andthe relationship of (c) can be found in:，，。
wherein the magnitudes of the gravity components in the direction represented by the dashed lines in fig. 4 to 6 are:，，. The angle arc values on each axis are calculated according to the pythagorean theorem and the inverse trigonometric function formula and are respectively as follows:
;
;
；
angle of curvature、、Into an angle value, here、、Is determined by the formula of radian rotating angle:obtaining:
；
；
；
wherein in the formula、、Is the acceleration in three axes, and、、respectively, the angles of the three axes with respect to their original positions.
The angle of the A ~ L electrode in the initialized state corresponding to the device is、、、、、、、、、、、Then it can be seen that the relationship between the B ~ L electrode and the a electrode is:wherein m is a positive integer.
If the gravity acceleration of the Z axis of the device is g and the included angle between the Z axis and the gravity acceleration direction is 0 when the device is used for measuring the heart sound under the condition that the device does not deflect, namely the electrode A is in the position which is right and parallel to the human body, the deflection can be selected at the momentAnd is different from the B electrodeThe H electrode forms a difference electrocardiosignal crossing the heart, and an optimized electrocardiosignal pickup point is realized. The device can be according to the angle change of Z axle, switches electrocardio-electrode at any time, because the device rotation angle can not be such integer always, the utility model discloses a look up the table according to the form that formulates in advance at specific angle within range, realize the switching to electrocardio-electrode.
In one embodiment, the table is shown in Table 1, where the correspondence in Table 1 is when the deflection angle isWhen the electrode A is selected to be used as the LA electrode, the electrode G is selected to be used as the RA electrode, and the electrode F is selected to be the RL electrode. Corresponding toThe range corresponds to three different electrocardio-electrode plates.
TABLE 1
The electrocardio-electrode is selected according to the following principle:
calculating the deflection angle of the attitude sensor relative to the original positionIf, ifLet us orderWherein n is an integer;
selecting LA electrode for standard lead electrocardiosignal calculation, and recording the central angle of LA electrode relative to A electrode as，；
(iii) determining the RA electrode from the LA electrode, the RA electrode and the LA electrode being opposed to each other, so thatFromConfirming the RA electrode;
fourthly, the RL electrode is confirmed according to the RA electrode, and the first electrode on the right side of the RA electrode is selected as a reference, so thatBy passingThe RL electrode is defined.
In an embodiment of a method for measuring heart sounds and electrocardiograms synchronously, which is not shown in the attached drawings, the method comprises the following steps: step A10: acquiring electrocardiosignals by each electrocardio electrode in the heart sound and electrocardio synchronous measuring probe and transmitting the electrocardiosignals to the main control circuit; step A20: the main control circuit performs difference operation on the electrocardiosignals according to the electrocardiosignals obtained in the step A10, and selects and obtains standard lead electrocardiosignals according to the difference operation result; step A30: the main control circuit outputs heart sound and electrocardio synchronous signals according to the obtained standard lead electrocardio signals. In this patent, the standard lead electrocardiographic signal refers to a forward electrocardiographic signal or a standard two-lead signal, the QRS wave of which is forward, and the synchronization relationship between the standard lead electrocardiographic signal and the heart sound signal is clear, so that the standard lead electrocardiographic signal and the heart sound signal are used for synchronization of the heart sound signal, and the timing accuracy of the heart sound signal is ensured.
In an embodiment of a method for measuring heart sound and electrocardio synchronously, which is not shown in the attached drawings, the method comprises the following steps: step B10: arranging an attitude sensor for acquiring the attitude of the heart sound electrocardio synchronous measuring probe in the heart sound electrocardio synchronous measuring probe; the attitude sensor is arranged in the heart sound electrocardio synchronous measuring probe below the sound sensor; step B20: an attitude sensor in the heart sound and electrocardio synchronous measuring probe acquires attitude information of the heart sound and electrocardio synchronous measuring probe and transmits the attitude information to the main control circuit; step B30: b20, selecting electrocardiosignals obtained by 3 electrocardio electrodes by the main control circuit according to the attitude information obtained in the step B20 to calculate and obtain standard lead electrocardiosignals; step B40: the main control circuit outputs heart sound and electrocardio synchronous signals according to the obtained standard lead electrocardio signals.
As shown in fig. 8, an embodiment of a method for measuring heart sounds and electrocardiograms synchronously includes the following steps: step C10: arranging an attitude sensor for acquiring the attitude of the heart sound electrocardio synchronous measuring probe in the heart sound electrocardio synchronous measuring probe; the attitude sensor is arranged in the heart sound electrocardio synchronous measuring probe below the sound sensor; sensing the three-axis acceleration of the attitude sensor; step C20: acquiring acceleration values in three-axis directions by three-axis acceleration sensing sampling of the attitude sensor, and transmitting the acceleration values to a main control circuit; step C30: the main control circuit calculates the offset angle of the heart sound electrocardio synchronous measuring device relative to the human body measuring contact surface according to the acceleration values in the three-axis direction obtained in the step C20; step C40: the main control circuit searches a bias angle and an electrocardio-electrode corresponding table pre-stored in the main control circuit according to the bias angle obtained by calculation, and the table is searched to obtain 3 electrocardio-electrodes for signal acquisition; step C50: after acquiring the electrocardio-electrodes according to a look-up table, calculating the electric signals acquired from the corresponding electrocardio-electrodes to acquire standard lead electrocardio-signals; step C60: the main control circuit outputs heart sound and electrocardio synchronous signals according to the obtained standard lead electrocardio signals.
In the embodiment of the method for measuring heart sound and electrocardiogram synchronously shown in fig. 8, after the table lookup determines the needed electrodes, the electrode analog switch is turned on, and the analog switch is a software switch arranged in the main control circuit or a hardware switch arranged in the main control circuit.
As shown in the schematic diagram of the working flow of the heart sound and electrocardiogram synchronous measuring device shown in fig. 9, it can be seen that when the heart sound and electrocardiogram synchronous measuring device works, synchronous sampling of heart sound and electrocardiogram signals is performed simultaneously through software, and when the heart sound and electrocardiogram synchronous measuring device works, the rotation angle of the detecting device or the probe is implemented, and the gating switch is adjusted according to the rotation angle to control signals of different electrocardiogram electrodes to enter the main control circuit for performing calculation and acquisition of standard lead electrocardiogram signals.
The utility model discloses a digital stethoscope, when gathering the heart sound, through the auscultation head a plurality of electrocardio electrodes on the synchronous measuring probe of heart sound electrocardio carry out synchronous collection to the electrocardiosignal. Not only can overcome the defect basis of the traditional stethoscope, but also can enable the time sequence information of the electrocardio to provide important reference value for the automatic analysis and positioning of the heart sound.
The above only is the embodiment of the present invention, not limiting the scope of the present invention, and all the equivalent structures or equivalent processes that are made by using the contents of the specification and the drawings of the present invention or directly or indirectly applied to other related technical fields are included in the same way in the protection scope of the present invention.
Claims (6)
1. A heart sound electrocardio synchronization measuring probe which is characterized in that:
the electrocardio-signal acquisition system comprises N electrocardio-electrodes for acquiring electrocardiosignals and a sound sensor for acquiring heart sound signals; wherein N is a natural number greater than or equal to 3;
the surface of the sound sensor contacted with the human body is arranged on the upper surface of the heart sound electrocardio synchronous measuring probe; the electrocardio-electrodes are arranged at the periphery of the sound sensor, and the surface of the electrocardio-electrodes contacted with the human body is arranged on the upper surface of the electrocardio-synchronous measuring probe.
2. The heart sound electrocardio synchronization measuring probe of claim 1, which is characterized in that:
the device also comprises an attitude sensor for acquiring the attitude of the heart sound electrocardio synchronous measuring probe;
the attitude sensor is arranged in the heart sound electrocardio synchronous measuring probe below the sound sensor.
3. The heart sound electrocardio synchronization measuring probe of claim 2, which is characterized in that:
the attitude sensor is a three-axis acceleration sensor.
4. The heart sound electrocardio synchronization measuring probe of claim 1, which is characterized in that:
the number of the electrocardio-electrodes is 12, and the 12 electrocardio-electrodes are uniformly distributed on the periphery of the sound sensor at equal intervals by taking the sound sensor as the center.
5. A heart sound and electrocardio synchronous measuring device based on the heart sound and electrocardio synchronous measuring probe of claim 1 is characterized in that:
the device comprises a heart sound and electrocardio synchronous measuring probe for collecting heart sound and electrocardiosignals, an analog amplifying circuit for analog amplification of the heart sound and electrocardiosignals, an analog-to-digital conversion circuit for analog-to-digital conversion of the collected heart sound and electrocardiosignals and a main control circuit for control of the heart sound and electrocardio synchronous measuring device;
the heart sound and electrocardio synchronous measuring probe is electrically connected with the analog amplifying circuit, the analog amplifying circuit is electrically connected with the analog-to-digital conversion circuit, the analog-to-digital conversion circuit is electrically connected with the main control circuit, and the main control circuit is electrically connected with the heart sound and electrocardio synchronous measuring probe;
the main control circuit is used for controlling the on-off of each electrocardio electrode in the heart sound electrocardio synchronous measuring probe.
6. The heart sound electrocardio synchronization measuring device of claim 5, wherein:
the wireless transmission circuit is used for wirelessly transmitting the electrocardio-heart sound signals and the power amplifier output circuit is used for outputting the heart sound signals; the wireless transmission circuit is electrically connected with the main control circuit, and the power amplifier output circuit is electrically connected with the main control circuit.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109381177A (en) * | 2018-11-12 | 2019-02-26 | 深圳大学 | Heart sound ECG Synchronization measuring probe, device and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109381177A (en) * | 2018-11-12 | 2019-02-26 | 深圳大学 | Heart sound ECG Synchronization measuring probe, device and method |
| CN109381177B (en) * | 2018-11-12 | 2023-11-14 | 深圳大学 | Heart sound and electrocardio synchronous measuring probe, device and method |
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