CN213075698U - Electronic stethoscope - Google Patents

Abstract

The utility model discloses an electronic stethoscope, including be used for gathering cardiopulmonary sound signal and convert it into the microphone of signal of telecommunication, be used for carrying out information processing's controller and be connected with the controller to the signal of telecommunication for carry out the display that shows according to the control signal of controller. When the electronic stethoscope is used, the microphone converts heart sound signals collected when the microphone is in contact with the skin of a human body into electric signals, then the electric signals are sent to the controller inside the electronic stethoscope, and the controller can visually display the electrocardio information of a patient through the display after calculating the electric signals. Compared with the traditional stethoscope, the electronic stethoscope can clearly know the heartbeat condition of a patient from a plurality of angles, so that doctors obtain more information; meanwhile, the display of the electronic stethoscope can visually display the symptoms of a patient, so that a plurality of doctors can conveniently conduct consultation at the same time, and the diagnosis success rate is further increased.

Description

Electronic stethoscope

Technical Field

The utility model relates to the field of medical equipment, especially, relate to an electronic stethoscope.

Background

Mechanical stethoscopes are the most commonly used diagnostic tools for internal and external gynecologists and have been in common use for many years. The heart sound and respiratory sound signals are important clinical medical signals, are important basis for distinguishing heart diseases and respiratory diseases, and are important information for doctors to analyze etiology and focus. Nowadays, auscultation is still the main means for doctors to perform examination in the diagnosis of heart diseases and respiratory diseases, and has the advantages of no trauma, convenience, economy and the like in vitro examination, so that auscultation is widely applied and cannot be replaced.

The traditional acoustic stethoscope only has two ears, is used by only one doctor and cannot be used for consultation of multiple persons. Moreover, the common stethoscope in the market has single function, cannot visually display the symptoms of the patient, and doctors can only roughly know the heartbeat condition of the patient and cannot judge the illness state more carefully, which may cause misdiagnosis.

In view of the above-mentioned prior art, the search for an improved electronic stethoscope is a problem that those skilled in the art are demanding to solve.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an electronic stethoscope, this electronic stethoscope can the visual display patient's heartbeat condition, and can support many people to meet a doctor.

In order to solve the technical problem, the utility model provides an electronic stethoscope, including be used for gathering cardiopulmonary sound signal and convert cardiopulmonary sound signal into the microphone of signal of telecommunication, be connected with the microphone for carry out information processing's controller and be connected with the controller to the signal of telecommunication, be used for carrying out the display that shows according to the control signal of controller.

Preferably, the electronic stethoscope further includes: the amplifying circuit is connected with the microphone and is used for amplifying the electric signal; and the filter circuit is connected with the amplifying circuit and used for filtering the electric signals and is connected with the controller.

Preferably, the filter circuit is a voltage-controlled voltage source second-order filter circuit formed by an integrated operational amplifier OP 27.

Preferably, the electronic stethoscope further includes: the power amplifier circuit is connected with the filter circuit and used for carrying out power amplification processing on the electric signals, and the loudspeaker is connected with the power amplifier circuit and used for converting the electric signals transmitted by the power amplifier circuit into sound signals.

Preferably, the power amplifier circuit is specifically a high-frequency amplifier TPA3116D 2.

Preferably, the electronic stethoscope further includes: and the indicator light is connected with the controller.

Preferably, the electronic stethoscope further includes: the buzzer is connected with the controller.

Preferably, the electronic stethoscope further includes: and the key is connected with the controller.

Preferably, the electronic stethoscope further includes: and the external memory is connected with the controller.

Preferably, the external memory is an external SD card.

The utility model provides an electronic stethoscope, including be used for gathering cardiopulmonary sound signal and convert it into the microphone of signal of telecommunication, be used for carrying out information processing's controller and be connected with the controller to the signal of telecommunication for carry out the display that shows according to the control signal of controller. When the electronic stethoscope is used, the microphone converts heart sound signals collected when the microphone is in contact with the skin of a human body into electric signals, then the electric signals are sent to the controller inside the electronic stethoscope, and the controller can visually display the electrocardio information of a patient through the display after calculating the electric signals. Compared with the traditional stethoscope, the electronic stethoscope can clearly know the heartbeat condition of a patient from a plurality of angles, so that doctors obtain more information; meanwhile, the display of the electronic stethoscope can visually display the symptoms of a patient, so that a plurality of doctors can conveniently conduct consultation at the same time, and the diagnosis success rate is further increased.

Drawings

In order to illustrate the embodiments of the present invention more clearly, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious to those skilled in the art that other drawings can be obtained based on these drawings without inventive work.

Fig. 1 is a schematic structural diagram of an electronic stethoscope according to the present invention;

fig. 2 is a circuit diagram of an amplifying circuit provided by the present invention;

fig. 3 is a circuit diagram of a filter circuit provided by the present invention;

fig. 4 is a circuit diagram of the power amplifier circuit provided by the present invention;

wherein, 10 is a controller, 11 is a microphone, 12 is a display, 13 is an amplifying circuit, 14 is a filter circuit, 15 is a power amplifier circuit, 16 is a loudspeaker, 17 is an indicator light, 18 is a buzzer, 19 is a key and 20 is an external memory.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, the ordinary skilled in the art can obtain all other embodiments without creative work, which all belong to the protection scope of the present invention.

The core of the utility model is to provide an electronic stethoscope.

In order to make the technical field better understand the solution of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings and the detailed description.

Fig. 1 is a schematic structural view of an electronic stethoscope according to the present invention. The structure of the electronic stethoscope shown in fig. 1 will be explained below.

The electronic stethoscope includes a microphone 11 for collecting cardiopulmonary sound signals and converting the cardiopulmonary sound signals into electrical signals, a controller 10 connected to the microphone 11 for performing information processing on the electrical signals, and a display 12 connected to the controller 10 for displaying according to control signals of the controller 10.

The utility model provides a microphone 11 comprises traditional stethoscope vibrating diaphragm head and small-size electret microphone in addition, because the microphone encapsulation is in the rubber tube, consequently to the sensitivity ratio of heart sound than higher, does not have the reflection to external sound almost. In practical use, the microphone 11 converts heart sound signals collected when contacting with human skin into electric signals, and then sends the electric signals to the controller 10 inside, the analog-to-digital converter inside the controller 10 can convert the electric signals into digital signals and send the digital signals to the display 12, and then the electrocardiogram of a patient is visually displayed through the display 12, wherein the mode is a time domain mode; the electrocardiogram may also be displayed by the display 12 after being processed by a Fast Fourier Transform (FFT), which is displayed in a frequency domain; the heart sound signals can also be counted, and the heart rate value in a period of time is displayed.

Compared with the traditional stethoscope, the electronic stethoscope provided by the embodiment of the utility model can clearly know the heartbeat condition of the patient from a plurality of angles, so that doctors can obtain more information; meanwhile, the display 12 of the electronic stethoscope can visually display the symptoms of the patient, thereby facilitating the consultation of a plurality of doctors at the same time and further increasing the success rate of diagnosis.

It should be noted that the above-mentioned embodiment does not limit the type of the microphone 11, and it may be a moving coil microphone, a condenser microphone, an electret microphone, or the like, as long as energy conversion for converting a sound signal into an electric signal is realized. Secondly, the present embodiment has no limitation on the model of the controller 10, and any chip capable of implementing the related functions of the present invention, such as the STM32 series, may be used, and the chip using the STM32f103 model is only a preferred embodiment. In addition, the display 12 in this embodiment uses a 4.5 inch capacitive screen for display, but is not limited to this type.

In the specific implementation, the cardiopulmonary sound signals collected by the microphone 11 include external noise and some components without diagnostic value besides the heartbeat information of the patient, which may cause interference to the diagnostic process of the doctor, so the filter circuit 14 needs to be added to filter the interference signals; since the electrical signal converted from the audio signal is very weak, it needs to be amplified by the amplifier circuit 13 and then sent to the filter circuit 14.

As shown in fig. 1, on the basis of the above embodiment, the present embodiment further includes: an amplifier circuit 13 connected to the microphone 11 for amplifying the electric signal; and a filter circuit 14 connected to the amplifier circuit 13 for filtering the electric signal, wherein the filter circuit 14 is connected to the controller 10.

The embodiment of the utility model provides an electronic stethoscope when in actual use, microphone 11 will gather the heart sound signal conversion for the signal of telecommunication with human skin contact time, then send into amplifier circuit 13 and enlarge, send into filter circuit 14 after that and carry out filtering processing, high frequency noise that filtering amplifier itself and external world spread into and do not have the high frequency composition of diagnostic value in the heart sound signal. The amplified and filtered electrical signal enters the controller 10, and an analog-to-digital converter inside the controller 10 can convert the electrical signal into a digital signal, and then the electrocardiographic information of the patient is visually displayed through the display 12.

Fig. 2 is the circuit diagram of the amplifying circuit provided by the present invention, as shown in fig. 2, the amplifying circuit 13 provided by the present invention includes a resistor R1, R2, R3, a potentiometer R4, a capacitor C1, and a capacitor C2, and the amplifying circuit 13 adopts an integrated operational amplifier OP 27. The direct coupling multistage amplifying circuit has high amplification factor, high input impedance and low output impedance, and has two input ends and one output end. The OP27 precision operational amplifier has low offset voltage and drift characteristics and high speed, low noise characteristics. The amplification factor can be adjusted by a potentiometer R4, and the theoretical maximum amplification factor of the circuit is 10 times. It should be noted that the integrated operational amplifier OP27 in this embodiment is only a preferred embodiment, and in specific implementation, integrated operational amplifiers such as OP07, μ a741, and LM324 may also be used. It is to be understood that the form of the amplifying circuit 13 is not limited thereto, and may be other circuit forms, even other hardware or software forms, as long as the relevant functions can be realized.

Fig. 3 is the utility model provides a filter circuit diagram, as shown in fig. 3, the utility model provides a filter circuit 14 includes resistance R5, R6, R7, R8 and electric capacity C3, C4, and filter circuit 14 adopts integrated OP27 to constitute low pass filter and constitutes suitable filter circuit. The utility model discloses a voltage-controlled voltage source second order filter circuit, voltage-controlled voltage source second order filter circuit's characteristics are: the operational amplifier is in the same phase connection method, the input impedance of the filter is very high, the output impedance is very low, and the filter is equivalent to a voltage source. The advantages are that: the circuit performance is stable, and the gain is easy to adjust. The cut-off frequency of the low-pass filter shown in fig. 3 is about 7000 Hz. It should be noted that the integrated operational amplifier OP27 in this embodiment is only a preferred embodiment, and in specific implementation, integrated operational amplifiers such as OP07, μ a741, and LM324 may also be used. It is to be understood that the form of the filter circuit 14 is not limited thereto, and may be other circuit forms or even other hardware or software forms as long as the relevant functions can be realized.

In some embodiments, the amplifying circuit 13 and the filtering circuit 14 may be integrated on one hardware, thereby reducing hardware cost.

The embodiment of the utility model provides an electronic stethoscope is when in actual use, because amplifier circuit 13 can be sent filter circuit 14 into after amplifying the signal of telecommunication that microphone 11 conveys, filter circuit 14 can filter external high frequency noise that spreads into and some do not have the high frequency composition of diagnostic value for the sound that gets into controller 10 is pure patient's heartbeat information, has got rid of noise interference, further increases the diagnosis success rate.

In the specific implementation, the microphone collects the heart sound signal with weak sound, which is greatly influenced by the environmental noise, so that a power amplifier circuit is required to be added to amplify the heart sound signal for the auscultation of a doctor.

As shown in fig. 1, on the basis of the above embodiment, the present embodiment further includes: a power amplifier circuit 15 connected with the filter circuit 14 for performing power amplification processing on the electric signal, and a loudspeaker 16 connected with the power amplifier circuit 15 for converting the electric signal transmitted by the power amplifier circuit into an acoustic signal.

The embodiment of the utility model provides an electronic stethoscope when in actual use, microphone 11 will gather the heart sound signal conversion for the signal of telecommunication with human skin contact time, then send into amplifier circuit 13 and enlarge, send into filter circuit 14 after that and carry out filtering processing, high frequency noise that filtering amplifier itself and external world spread into and do not have the high frequency composition of diagnostic value in the heart sound signal. One path of the amplified and filtered electric signal enters the controller 10, an analog-to-digital converter in the controller 10 can convert the electric signal into a digital signal, and then the electrocardiogram information of the patient is visually displayed through the display 12; the other path enters a power amplification circuit for power amplification, and drives a loudspeaker to convert the heart sound signal into a sound signal for the auscultation of a doctor.

Fig. 4 is the circuit diagram of the power amplifier circuit 15 provided by the utility model, as shown in fig. 4, the utility model provides a power amplifier circuit 15 includes resistance R16, R17, R18, R19, R20 and electric capacity C21, C22, C23, C24, C25, C26, C27, C28, C29, C30, C31, C32, C33 and inductance L3, L4, what power amplifier circuit 15 adopted is power amplifier TPA3116D 2. TPA3116D2 is a highly efficient stereo (BTL) class D audio amplifier with efficiencies as high as over 90%, requiring no external heat sink at output powers below 30W. A multi-switching frequency option is adopted to suppress AM interference, so that an output signal is relatively pure. The power amplifier circuit 15 adopts a single-channel BTL connection method, and the output power depends on parameters such as the amplitude of an input signal, the magnitude of power supply voltage, the magnitude of impedance of a loudspeaker and the like.

It should be noted that the integrated power amplifier TPA3116D2 is only a preferred embodiment, and in the specific implementation, a power amplifier chip of a type of TPA3118D2 may be used instead. It should be understood that the form of the power amplifier circuit 15 is not limited thereto, and may also be in other circuit forms, even other hardware or software forms, as long as the relevant functions can be realized.

The embodiment of the utility model provides an electronic stethoscope when in actual use, power amplifier circuit 15 carries out power amplification with the signal of telecommunication that filter circuit 14 conveys, then drive speaker 16 and convert the signal of telecommunication into sound signal and enlarge, supply the doctor's auscultation to use. The embodiment of the utility model provides an electronic stethoscope is from taking the speaker to enlarge the function, and a plurality of doctors of being convenient for are consultation simultaneously. Meanwhile, the technical scheme of the D-type amplifier is adopted, so that the efficiency of electric energy conversion is improved, and the size of the device is reduced.

In the implementation, in order to further increase the diagnosis efficiency of the doctor, as a preferred embodiment, an indicator lamp 17 and a buzzer 18 are added on the basis of the above embodiment, and the indicator lamp and the buzzer are both connected with the controller 10, please refer to fig. 1.

The embodiment of the utility model provides an electronic stethoscope when in actual use, controller 10 can count the heart sound signal to show the heart rate value in a period through display 12. The indicator light 17 can synchronously indicate the heartbeat speed, so that the heartbeat condition of the patient can be visually displayed, and the diagnosis efficiency of a doctor is improved; when the detected heart sound is not within the set normal frequency range, the buzzer 18 sounds to give an alarm.

The electronic stethoscope has the automatic heart rate counting function, so that errors caused by artificial counting are avoided, and the work efficiency of doctors is improved because the indicator lamp 17 can synchronously indicate the heartbeat speed; when the heart sound of the patient is abnormal, the buzzer gives an alarm, so that a doctor can take corresponding measures in time, and the patient can be treated timely.

The above-described embodiment is not limited to the type of the buzzer 18, and may be any alarm device that can implement an alarm function. The utility model discloses well adoption 14mm passive piezoelectric type buzzer is only a preferred embodiment.

In the implementation, in order to facilitate the operation of the doctor, as a preferred embodiment, a button 19 is added on the basis of the above embodiment, and the button 19 is connected with the controller 10, please refer to fig. 1.

The embodiment of the utility model provides an electronic stethoscope has three button altogether when in actual use, and a button switches the use as the function, switches between electrocardio time domain picture, spectrogram, heart rate counting function, and the save and playback function of data are realized to another button to the computer carries out further analysis and processing. The third key realizes the power switch function of the electronic stethoscope.

The embodiment of the utility model provides a button 19 that sets up has realized the human-computer interaction between doctor and the electron stethoscope effectively for the doctor operates more simply, convenient, has improved diagnosis efficiency.

In the implementation, in order to facilitate the storage of the heartbeat information of the patient, as a preferred embodiment, an external memory 20 is added on the basis of the above embodiment, and the external memory 20 is connected with the controller 10.

The embodiment of the utility model provides an electronic stethoscope when the in-service use, button 19 can save patient's cardiopulmonary information to external memory to the computer carries out further analysis and processing, carries out the record storage to sound information through external memory, also provides first hand data for the diagnosis and the research of disease from now on when richening patient's case history archives.

It should be noted that the above embodiments are not limited to the type of the external memory 20, and the external memory 20 may also include a high speed random access memory, and a nonvolatile memory, such as one or more magnetic disk storage devices and a flash memory storage device, and the storage manner may be a transient storage manner or a permanent storage manner. The external SD card adopted in the utility model is only a preferred embodiment.

The above details are provided for the electronic stethoscope provided by the present invention. The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

It is further noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Claims (9)

1. An electronic stethoscope is characterized by comprising a microphone, a controller, a display and a buzzer, wherein the microphone is used for collecting cardiopulmonary sound signals and converting the cardiopulmonary sound signals into electric signals, the controller is connected with the microphone and used for processing information of the electric signals, the display is connected with the controller and used for displaying according to control signals of the controller, and the buzzer is connected with the controller.

2. The electronic stethoscope of claim 1, further comprising: the amplifying circuit is connected with the microphone and is used for amplifying the electric signal; and the filter circuit is connected with the amplifying circuit and used for filtering the electric signals, and the filter circuit is connected with the controller.

3. The electronic stethoscope according to claim 2, wherein said filter circuit is a voltage-controlled voltage source second-order filter circuit formed by an integrated operational amplifier OP 27.

4. The electronic stethoscope of claim 2, further comprising: the power amplifier circuit is connected with the filter circuit and used for carrying out power amplification processing on the electric signals, and the loudspeaker is connected with the power amplifier circuit and used for converting the electric signals transmitted by the power amplifier circuit into sound signals.

5. The electronic stethoscope according to claim 4, wherein said power amplifier circuit is a high frequency amplifier TPA3116D 2.

6. The electronic stethoscope of claim 1, further comprising: the indicator light is connected with the controller.

7. The electronic stethoscope of claim 1, further comprising: and the key is connected with the controller.

8. The electronic stethoscope of any one of claims 1-7, further comprising: and the external memory is connected with the controller.

9. The electronic stethoscope according to claim 8, wherein said external memory is an external SD card.

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