CN108852404A - A kind of Intelligent stethoscope system - Google Patents

Abstract

The present invention relates to a kind of Intelligent stethoscope system, including wrap main control unit for carrying out the pretreated acquisition unit such as data acquisition and amplification filtering, being mainly used for realizing processing and analysis to data, in back-end realization to the processing of data and analytical industry computer and for realizing the sound play device of playing function.The present invention is based on single-chip microcontroller designs, use sound transducer, filter, operational amplifier, the heart and lung sounds signal heard is allowed to be more clear accurately, it makes correctly diagnosis in time for doctor and provides strong data support, simultaneously, rear end carries out back-end processing using industrial computer, and result is verified, and further confirms that whether diagnosis is wrong.

Description

A kind of Intelligent stethoscope system

Technical field

The invention belongs to medical stethoscope field, specifically a kind of Intelligent stethoscope system.

Background technique

Heart sound and breath sound are two important physiological signals of human body：Heart sound is in heart and cardiovascular system mechanical movement The general name of produced sound includes heart various pieces itself and the physiology and pathological information that act between each other；Breath sound It is the general name of respiratory system produced sound in ventilating action, includes lung physiology and pathological information.At present, facing It is still the auscultation to heart sound and breath sound to the Main Diagnosis means of cardiovascular and cerebrovascular and respiratory disease on bed.

Traditional stethoscope is by resonance plate, sound resonance chamber, and the conduit composition of conduction sound, it the shortcomings that be：It is difficult To capture some faint very important physiological sounds of human body viscera sending, accuracy is poor；It can not while auscultation It realizes waveform real-time display, is easy to be influenced by human ear hearing sensitivity limitation and auscultator's subjective experience；The same time can only be used In auscultating a kind of physiological sound signal, auscultation cannot be integrated.These disadvantages eventually lead to doctor and can not do in time in some cases Correctly diagnosis out.

In view of the above technical problems, therefore it is necessary to design a kind of stethoscope of electronic type, it is filtered by using hardware Wave device, operational amplifier, allow the heart and lung sounds signal heard to be more clear accurately, made in time for doctor correctly diagnosis provide according to According to.

Summary of the invention

It is an object of the invention to overcome the technical problem present on, a kind of Intelligent stethoscope system is provided.

To achieve the above object, the present invention adopts the following technical scheme that.

A kind of Intelligent stethoscope system, including acquisition unit, the pre- places such as acquisition and amplification filtering for carrying out data Reason；Main control unit is mainly used for realizing processing and analysis to data；Industrial computer, in back-end realization to data Processing and analysis；Sound play device, for realizing playing function；The acquisition unit includes sound transducer, filtering, signal Amplifier and Phototube Coupling；The main control unit includes single-chip microcontroller and the LED module being electrically connected with single-chip microcontroller, memory, string Mouthful；The sound transducer passes sequentially through the filtering, signal amplifier and Phototube Coupling and the single-chip microcontroller is electrically connected；Institute It states sound play device and the single-chip microcontroller is electrically connected；The single-chip microcontroller is electrical by the serial ports and the industrial computer Connection.

Further, the serial ports can be RS232 interface, RS422 interface and RS485 interface.

Further, the sound play device can be loudspeaker or sound equipment.

Further, the single-chip microcontroller uses STM32F103 chip.

Further, the Phototube Coupling uses optocoupler 6n136.

Further, the main control unit further includes indicator light, and the indicator light and the single-chip microcontroller are electrically connected.

Further, the main control unit further includes clock module, and the clock module and the single-chip microcontroller are electrically connected.

The beneficial effects of the invention are as follows：It is designed based on single-chip microcontroller, using sound transducer, filter, operational amplifier, is allowed The heart and lung sounds signal heard is more clear accurately, is made correctly diagnosis in time for doctor and is provided strong data support, Meanwhile rear end carries out back-end processing using industrial computer, and result is verified, and further confirms that whether diagnosis has Accidentally.

Detailed description of the invention

Fig. 1：Structural schematic diagram of the invention.

Fig. 2：Signal amplifier principle figure.

Fig. 3：The schematic diagram of optocoupler 6n136.

Specific embodiment

The following describes the present invention in detail with reference to the accompanying drawings and embodiments.

As shown in Figure 1, a kind of Intelligent stethoscope system, including acquisition unit, during acquiring heart and lung sounds signal, no It can avoid having noise and mix wherein, these noises not only influence to acquire the accuracy of signal, may be complete under more serious situation The effective component of measured signal is fallen in all standing, thus before heart and lung sounds are carried out with careful analysis identification, it is necessary to first to adopting The signal collected is pre-processed, and tries to filter out and weaken noise, the acquisition unit be mainly used for carrying out the acquisition of data with And the pretreatment such as amplification filtering；Main control unit is mainly used for realizing processing and analysis to data；Industrial computer is used for Processing and analysis of the back-end realization to data；Sound play device, for realizing playing function；The acquisition unit includes sound Sensor, filtering, signal amplifier and Phototube Coupling；The main control unit includes single-chip microcontroller and is electrically connected with single-chip microcontroller LED module, memory, serial ports, LED module can show analysis treated data result with waveform, memory for store acquisition and The data of analysis, convenient for calling analysis and processing later.

The sound transducer passes sequentially through the filtering, signal amplifier and Phototube Coupling and electrically connects with the single-chip microcontroller It connects；The sound play device and the single-chip microcontroller are electrically connected；The single-chip microcontroller is calculated by the serial ports and the industry Machine is electrically connected.

As shown in Fig. 2, above sound sensor uses electret capcitor microphone, technical indicator is：Sensitivity 2mV/μbar；0~2MHz of frequency response range；Impedance is less than 2.2K Ω；Signal-to-noise ratio 58dB or more.Due to the frequency range of heart sound It is 20~600Hz, the frequency range of breath sound is approximately 100~1500Hz, therefore electret capcitor microphone is to can satisfy It is required that.

As shown in Fig. 2, above-mentioned signal amplifier uses chip for μ A741, it is placed in after filter circuit, is mainly in view of this Although when signal it is more pure but and be unsatisfactory for power amplifier requirement, therefore need to be further amplified.It also reduces as much as possible simultaneously Influence of the noise to signal, it is used

Preferably, the single-chip microcontroller plays the core of analysis, calculation process preferably with STM32F103 chip in systems Heart effect, the chip are that (ST) company of STMicw Electronics produces, and kernel is Cortex-M3, integrated chip timer, CAN, ADC, SPI, I2C, USB, UART, etc. multiple functions, up to 72MHz working frequency, the Flash with 64K capacity it is very suitable For medical control field.

Preferably, the serial ports can be RS232 interface, RS422 interface and RS485 interface, in this way offer many general The compatibility of system Yu external equipment connection communication can be improved in standard interface.

Preferably, the sound play device can use loudspeaker, sound equipment or other playback equipments, be played by voice It can tell doctor, clearly much sooner so that doctor carries out next step diagnostic work in time.

Preferably, as shown in figure 3, the Phototube Coupling is preferably with optocoupler 6n136, due to having letter when acquisition data Number interference using hardware optocoupler 6n136, can be greatly eliminated interference and believed in this way therefore in order to eliminate interference to the full extent Number, it is ensured that the data of acquisition are more clear.

Preferably, the main control unit further includes indicator light, and the indicator light and the single-chip microcontroller are electrically connected, to aobvious Show the running state information of current system, personnel convenient to use can be intuitive to see whether current system is running, either No operation is faulty.

Preferably, the main control unit further includes clock module, and the clock module is to storage system present clock.

The working principle of lower system is briefly described below：

The physiological hurts such as the heart sound of human body, breath sound are accurately acquired and are come out by sound transducer, pass through built-in conversion Circuit module becomes original electric signal.Original signal is input to filter module after primary amplification, it is clear so as to obtain Clear heart sound effect.By filter module signal is filtered and Denoising disposal after, faint cardiechema signals will be further It is sent into main amplification module and amplifies processing.In main amplification module, analog signal is sent into main control unit, turns through included A/D Understandable digital signal is converted to after changing circuit module processing, and is sent into LED module progress waveform by single-chip microcontroller and shows, together When store data in memory, and industrial computer is transmitted data to by serial ports, can be with by industrial computer Quadratic logarithm according to being analyzed and being handled, can verify in this way with main control module analysis data result it is whether consistent, further Confirm that analyzed data are correct.

Finally it should be noted that：Above embodiments are only to illustrate the present invention and not limit technology described in the invention Scheme；Therefore, although this specification is referring to above-mentioned each embodiment, the present invention has been described in detail, this Field it is to be appreciated by one skilled in the art that still can modify to the present invention or equivalent replacement；And all do not depart from this The technical solution and its improvement of the spirit and scope of invention, should all cover within the scope of the claims of the present invention.

Claims (7)

1. a kind of Intelligent stethoscope system, including acquisition unit, the pretreatments such as acquisition and amplification filtering for carrying out data； Main control unit is mainly used for realizing processing and analysis to data；Industrial computer, for the processing in back-end realization to data And analysis；Sound play device, for realizing playing function；It is characterized in that：The acquisition unit includes sound transducer, filter Wave, signal amplifier and Phototube Coupling；The main control unit include single-chip microcontroller and with single-chip microcontroller be electrically connected LED module, Memory, serial ports；The sound transducer passes sequentially through the filtering, signal amplifier and Phototube Coupling and the single-chip microcontroller is electrical Connection；The sound play device and the single-chip microcontroller are electrically connected；The single-chip microcontroller is counted by the serial ports and the industry Calculation machine is electrically connected.

2. Intelligent stethoscope system according to claim 1, it is characterised in that：The serial ports is RS232 interface, or RS422 interface or RS485 interface.

3. Intelligent stethoscope system according to claim 1, it is characterised in that：The sound play device be loudspeaker or Sound equipment.

4. Intelligent stethoscope system according to claim 1, it is characterised in that：The single-chip microcontroller uses STM32F103 core Piece.

5. Intelligent stethoscope system according to claim 1, it is characterised in that：The Phototube Coupling uses optocoupler 6n136.

6. Intelligent stethoscope system according to claim 1, it is characterised in that：The main control unit further includes indicator light, The indicator light and the single-chip microcontroller are electrically connected.

7. according to claim 1 to any Intelligent stethoscope system described in 6, it is characterised in that：The main control unit further includes Clock module, the clock module and the single-chip microcontroller are electrically connected.