CN103654841A - Portable digital stethoscope - Google Patents

Abstract

Translated fromChinese

本发明公开了一种便携式数字听诊器，由听诊头、胶管、信号处理单元、耳件、存储装置、液晶显示及按键模块以及电源组成，其中：所述信号处理单元位于胶管内，所述听诊头可更换，与胶管采用螺纹连接，所述听诊器具有存储器或者SD卡，并通过USB接口与电脑通信，也可利用zigbee协议完成无线通信功能，所述耳件内嵌入有耳机，耳机通过耳机接口与信号处理单元相连，所述电源为可充电锂电池，液晶显示屏显示相关信息。与传统听诊器相比，所述听诊器可更换听诊头、可选择听诊模式、可调节音量、可录音存储、计时、显示心率、无线通信，操作简单，使用方便，有利于医务人员使用，以及教学活动。

The invention discloses a portable digital stethoscope, which is composed of a stethoscope head, a rubber hose, a signal processing unit, ear pieces, a storage device, a liquid crystal display, a key module and a power supply, wherein: the signal processing unit is located in the rubber hose, and the stethoscope head Replaceable, threaded connection with the rubber hose, the stethoscope has a memory or SD card, and communicates with the computer through the USB interface, and can also use the zigbee protocol to complete the wireless communication function. The earphone is embedded in the earpiece, and the earphone communicates with the earphone through the earphone interface. The signal processing unit is connected, the power supply is a rechargeable lithium battery, and the liquid crystal display screen displays relevant information. Compared with the traditional stethoscope, the stethoscope can replace the auscultation head, select the auscultation mode, adjust the volume, record and store, time, display the heart rate, wireless communication, and is easy to operate and easy to use, which is beneficial to the use of medical personnel and teaching activities .

Description

Translated fromChinese

便携式数字听诊器Portable Digital Stethoscope

技术领域technical field

本发明专利涉及到医疗器械领域，尤其是提出了一种便携式数字听诊器。The patent of the present invention relates to the field of medical equipment, and in particular proposes a portable digital stethoscope.

背景技术Background technique

听诊器是诊断呼吸系统、心血管系统疾病的重要工具，是医生的标志，听诊器最早由法国医生雷纳克（Rene larnnec）发明，经过英国医生乔治.菲利普.卡门、霍华德.斯普雷格(HowardSprague)与鲍尔斯(Bowles)等人不断改良后形成了现在普遍使用的传统声学听诊器。传统声学听诊器主要包括听诊头（胸件）、传导部分（胶管）、听音部分（耳件）。The stethoscope is an important tool for diagnosing diseases of the respiratory system and cardiovascular system, and is a symbol of a doctor. The stethoscope was first invented by the French doctor Rene larnnec and passed through British doctors George Philip Carmen and Howard Sprague. ) and Bowles (Bowles) etc. have been continuously improved to form the traditional acoustic stethoscope that is now commonly used. The traditional acoustic stethoscope mainly includes a stethoscope head (chest piece), a conductive part (rubber tube), and a listening part (earpiece).

传统声学听诊器原理大致如下：拾音部分是一个面积较大的膜腔，身体内声波使听诊器的膜片振动，从而带动听诊器内部的空气随之振动，由于听诊器的胶管和耳件部位的腔道细窄，则该部分空气振动幅度比膜腔内大，因而听到了放大后的声音信号。The principle of the traditional acoustic stethoscope is roughly as follows: the sound pickup part is a large membrane cavity, and the sound waves in the body vibrate the diaphragm of the stethoscope, thereby driving the air inside the stethoscope to vibrate accordingly. If it is thin and narrow, the vibration amplitude of this part of the air is larger than that in the membrane cavity, so the amplified sound signal is heard.

虽然传统听诊器被广泛使用，但使用过程中发现了如下问题：心音信号、呼吸音信号等声音信号极其微弱，难以捕捉，易受环境干扰，准确性较差；声音波形复杂，在传递的过程中会出现失真的情况，听诊器胶管越长，越可能出现失真，且会受到人耳听觉上的先天限制；传统听诊器只能为一名医生所听诊，不利于病情的综合会诊，且不便于医学院有关听诊课程的教学；医生在使用听诊器是常常需要计数心率，所以必需借助手表或者其他计时工具来完成；听诊时需要医生近距离诊断，对于一些传染疾病，医生可能被患者传染，无法实现无接触式听诊。因此研制一种便携式数字听诊器，对临床工作、教学都要重要意义。Although traditional stethoscopes are widely used, the following problems have been found during use: heart sound signals, breath sound signals and other sound signals are extremely weak, difficult to capture, susceptible to environmental interference, and poor in accuracy; sound waveforms are complex, and in the process of transmission Distortion will occur. The longer the stethoscope hose, the more likely it will be distorted, and it will be limited by the inherent hearing of the human ear; the traditional stethoscope can only be auscultated by one doctor, which is not conducive to comprehensive consultation of the disease, and it is not convenient for medical schools. Teaching about auscultation courses; doctors often need to count heart rate when using a stethoscope, so it must be done with the help of a watch or other timing tools; auscultation requires a doctor to make a close-up diagnosis. For some infectious diseases, the doctor may be infected by the patient and cannot achieve non-contact auscultation. Therefore develop a kind of portable digital stethoscope, all will important significance to clinical work, teaching.

发明内容Contents of the invention

本发明专利目的是，提供一种便携式数字听诊器。The patent object of the present invention is to provide a portable digital stethoscope.

为实现上述目的，本发明专利采用的技术方案是：听诊器具有听诊头、胶管、信号处理单元、耳件、存储装置、液晶显示及按键模块以及电源，所述信号处理单元位于胶管内，所述听诊头可更换，与胶管采用螺纹连接，所述信号处理单元实现了声信号、电信号、数字信号的相互转换以及信号的放大滤波，所述听诊器具有存储器或者SD卡，可通过微处理器将数字信号转换为文件存储在其中，并通过USB接口与电脑通信，也可通过zigbee协议完成无线通信功能，所述耳件内嵌入有耳机，耳机通过耳机接口与信号处理单元相连。In order to achieve the above object, the technical solution adopted by the patent of the present invention is: the stethoscope has a stethoscope head, a rubber hose, a signal processing unit, an ear piece, a storage device, a liquid crystal display and a key module and a power supply, the signal processing unit is located in the rubber hose, and the The auscultation head can be replaced, and it is threadedly connected with the rubber tube. The signal processing unit realizes the mutual conversion of acoustic signals, electrical signals, and digital signals, as well as the amplification and filtering of signals. The stethoscope has a memory or SD card, which can The digital signal is converted into a file and stored in it, and communicates with the computer through the USB interface, and can also complete the wireless communication function through the zigbee protocol. The earphone is embedded in the earpiece, and the earphone is connected to the signal processing unit through the earphone interface.

所述的听诊头可更换，共有5个听诊头可供选择，分别为两个膜型听诊头、三个钟型听诊头，听诊头的大小各有不同。The auscultation head can be replaced, and there are 5 auscultation heads to choose from, which are two membrane-shaped auscultation heads and three bell-shaped auscultation heads, and the sizes of the auscultation heads are different.

所述信号处理单元由驻极体电容式传声器、信号放大电路、可编程滤波电路、音频编码器或模数转换电路、微处理器、音频解码器或数模转换电路、可调音频功放组成，所述驻极体电容式传声器将声信号转换为电信号，所述信号放大电路将电信号放大，所述可编程滤波电路具有低频模式、高频模式、全频模式三种，所述音频编码器或者模数转换电路将调理后电信号转换为数字信号，所述音频解码器或者数模转换电路将数字信号转换为电信号，可调音频功放电信号放大以驱动耳机。The signal processing unit is composed of an electret condenser microphone, a signal amplification circuit, a programmable filter circuit, an audio encoder or an analog-to-digital conversion circuit, a microprocessor, an audio decoder or a digital-to-analog conversion circuit, and an adjustable audio power amplifier. The electret condenser microphone converts the acoustic signal into an electrical signal, the signal amplifying circuit amplifies the electrical signal, the programmable filter circuit has three types: low-frequency mode, high-frequency mode, and full-frequency mode, and the audio coding A converter or an analog-to-digital conversion circuit converts the conditioned electrical signal into a digital signal, and the audio decoder or a digital-to-analog conversion circuit converts the digital signal into an electrical signal, and the adjustable audio power discharge signal is amplified to drive the earphone.

所述的按键模块可开关机、开启无线通信功能、录音、选择听诊模式，调节音量大小。The button module can switch the machine on and off, turn on the wireless communication function, record, select the auscultation mode, and adjust the volume.

所述的液晶显示模块显示工作模式、当前电量、无线通信状态、心率以及当前时间。The liquid crystal display module displays the working mode, current power, wireless communication status, heart rate and current time.

所述的电源采用可充电锂电池供电，可通过USB接口对锂电池充电。The power supply is powered by a rechargeable lithium battery, which can be charged through a USB interface.

本发明专利优点在于：The advantages of the patent of the present invention are:

1.具有多个听诊头，医务人员可根据患者情况挑选不同听诊头。1. With multiple auscultation heads, medical staff can choose different auscultation heads according to the patient's condition.

2.具有三种听诊模式（低频模式、高频模式、全频模式），医务人员可以选择听取不同频率成分的声音信号。2. With three auscultation modes (low frequency mode, high frequency mode, full frequency mode), medical staff can choose to listen to the sound signals of different frequency components.

3.具有音量调节功能，使医务人员听诊更清楚、更准确。3. It has the function of volume adjustment, which makes the auscultation of medical staff clearer and more accurate.

4.具有无线通信功能，可与同款听诊器、电脑、PDA无线通信，分享听诊音，可利用相关软件显示听诊音波形，对其进行分析，便于会诊。4. With wireless communication function, it can communicate with the same stethoscope, computer, and PDA wirelessly to share the auscultation sound, and can use related software to display the waveform of the auscultation sound and analyze it, which is convenient for consultation.

5.具有录音、存储功能，可将不同患者的听诊音记录下来，以便跟进患者的病情变化。5. With recording and storage functions, it can record the auscultation sounds of different patients so as to follow up the changes of patients' condition.

6.SD卡中存储典型疾病的心音、呼吸音，可选择听取，方便教学。6. The heart sound and breath sound of typical diseases are stored in the SD card, which can be selected to listen to, which is convenient for teaching.

7.可显示时间和心率，医务人员无需在听诊过程中看手表计时，数心率。7. It can display time and heart rate, and medical personnel do not need to watch the watch to count the time and count the heart rate during the auscultation process.

8.保持了传统听诊器的外形结构，符合医生的使用习惯。8. It maintains the shape and structure of the traditional stethoscope, which is in line with the doctor's usage habits.

附图说明Description of drawings

附图1为本发明专利的便携式数字听诊器的一种实施例外观示意图Accompanying drawing 1 is the appearance schematic diagram of a kind of embodiment of the portable digital stethoscope of the patent of the present invention

附图2为本发明专利的便携式数字听诊器的一种实施例液晶显示及按键示意图Accompanying drawing 2 is a kind of embodiment liquid crystal display and button schematic diagram of the portable digital stethoscope of the present invention patent

附图3为本发明专利的便携式数字听诊器的结构原理框图Accompanying drawing 3 is the structural principle block diagram of the portable digital stethoscope of the patent of the present invention

具体实施方式Detailed ways

下面结合实施例并参考附图对本发明专利作进一步说明Below in conjunction with embodiment and with reference to accompanying drawing, patent of the present invention will be further described

所示的便携式数字听诊器，具有听诊头1、听诊头2、听诊头3、听诊头4、听诊头5、胶管10、信号处理单元9、耳件12、液晶显示及按键模块14以及电源、存储装置构成。所述听诊头1为膜型听诊头，其直径为45mm，听诊头2为膜型听诊头，其直径为30mm，听诊头3为钟型听诊头，其直径为34mm，听诊头4为钟型听诊头，其直径为25mm，听诊头5为钟型听诊头，其直径为20mm，听诊头通过螺纹结构6与胶管10相连。The portable digital stethoscope shown has a stethoscope head 1, a stethoscope head 2, a stethoscope head 3, astethoscope head 4, astethoscope head 5, arubber hose 10, asignal processing unit 9, anear piece 12, a liquid crystal display and akey module 14, and a power supply, a storage device configuration. Described auscultation tip 1 is a membrane-type auscultation tip, and its diameter is 45mm; auscultation tip 2 is a membrane-type auscultation tip, and its diameter is 30 mm; auscultation tip 3 is a bell-shaped auscultation tip, and its diameter is 34 mm;auscultation tip 4 is a bell-shaped The auscultation head has a diameter of 25 mm. Theauscultation head 5 is a bell-shaped auscultation head with a diameter of 20 mm. The auscultation head is connected to therubber tube 10 through a threadedstructure 6 .

所述的信号处理单元9位于胶管10内，驻极体电容式传声器30将声信号转换为电信号，电信号进过信号放大电路31被放大，可编程滤波电路32对放大后信号进行滤波去噪处理，音频解码器或者模数转换电路33将电信号转换为数字信号。音频编码器或者数模转换电路39将数字信号转换为电信号，电信号经过可调音频功放38被放大，最终由听诊器耳耳机36通过耳机接口37听取声信号，所述听诊器36耳机嵌入耳件12中。Thesignal processing unit 9 is located in therubber hose 10, theelectret condenser microphone 30 converts the acoustic signal into an electrical signal, and the electrical signal enters thesignal amplification circuit 31 to be amplified, and theprogrammable filter circuit 32 filters the amplified signal. Noise processing, the audio decoder or analog-to-digital conversion circuit 33 converts the electrical signal into a digital signal. The audio encoder or digital-to-analog conversion circuit 39 converts the digital signal into an electrical signal, and the electrical signal is amplified through an adjustableaudio power amplifier 38, and finally the sound signal is listened to by thestethoscope earphone 36 through theearphone interface 37, and the earphone of thestethoscope 36 is embedded in theearpiece 12 in.

所述的便携式数字听诊器按键如图2所示，按键23为开关键，按键22为听诊模式切换键，按键20为无线通信功能开关键，按键17为调高音量键，按键28为降低音量键，按键16为无线发送键，按键27为无线接收键，按键15为录音/回放键。Described portable digital stethoscope button is as shown in Figure 2, andbutton 23 is switch key, andbutton 22 is auscultation mode switching key, andbutton 20 is wireless communication function switch key, andbutton 17 is volume up key, andbutton 28 is volume down key ,key 16 is a wireless sending key,key 27 is a wireless receiving key, andkey 15 is a recording/playback key.

所述的便携式数字听诊器液晶显示模块采用1.5寸TFT液晶显示屏，显示区18显示无线功能状态，显示区19为听诊模式状态，显示区21为音量状态，显示区24为电量状态，显示区25显示心率，显示区26显示当前时间。Described portable digital stethoscope liquid crystal display module adopts 1.5 cun TFT liquid crystal display screens, anddisplay area 18 shows wireless function state, anddisplay area 19 is auscultation mode state, anddisplay area 21 is volume state, anddisplay area 24 is power state, anddisplay area 25 The heart rate is displayed, and thedisplay area 26 displays the current time.

所述的便携式数字听诊器的存储装置由微处理器40、存储器或者SD卡34和USB接口42构成，当按下需要录音时，微处理器40将信号以文件形式记录下来，存储在存储器或者SD卡34中，并可通过USB接口42与电脑通信，当需要回放时，微处理器40读取存储器或者SD卡34中信息。The storage device of described portable digital stethoscope is made ofmicroprocessor 40, memory orSD card 34 andUSB interface 42, when pressing needs recording,microprocessor 40 records signal with file form, is stored in memory orSD card 34, and can communicate with the computer through theUSB interface 42, when playback is required, themicroprocessor 40 reads the memory or the information in theSD card 34.

所述的听诊模式切换键22可选择听诊模式，听诊模式由可编程滤波电路32决定，微处理器40接收到按键22信息时，根据信息调整可编程滤波电路截止频率，从而改变听诊模式，低频听诊模式频率为20-500Hz，高频听诊模式频率为200-500Hz，全频模式频率为20-1500Hz，所述的听诊模式显示区19将会显示“低”“高”“全”，以表示当前听诊模式。The auscultationmode switching key 22 can select the auscultation mode, and the auscultation mode is determined by theprogrammable filter circuit 32. When themicroprocessor 40 receives the information of thebutton 22, it adjusts the cut-off frequency of the programmable filter circuit according to the information, thereby changing the auscultation mode. The frequency of the auscultation mode is 20-500Hz, the frequency of the high-frequency auscultation mode is 200-500Hz, and the frequency of the full-frequency mode is 20-1500Hz. Thedisplay area 19 of the auscultation mode will display "low", "high" and "full" to indicate Current auscultation mode.

所述的调高音量键17、降低音量键28可调节听诊器耳机36的音量，音量大小由可调音频功放39决定，所述音量状态显示区21显示当前音量。The volume upkey 17 and volume downkey 28 can adjust the volume of thestethoscope earphone 36, the volume is determined by the adjustableaudio power amplifier 39, and the volumestatus display area 21 displays the current volume.

所述的无线通信41基于zigbee协议完成，开启无线通信功能开关20便可与同款听诊器、电脑、PDA通信，按下无线发送键16将发送信息，按键无线接收键27将会接收信息。Thewireless communication 41 is completed based on the zigbee protocol. Turn on the wirelesscommunication function switch 20 to communicate with the same model stethoscope, computer, and PDA. Press thewireless sending key 16 to send information, and press thewireless receiving key 27 to receive information.

所述的便携式数字听诊器的电源43采用可充电锂电池供电，电量状态显示在液晶显示器显示区24中，当电量过低时，可通过USB接口对锂电池充电。Thepower supply 43 of the portable digital stethoscope adopts a rechargeable lithium battery to supply power, and the power state is displayed in theLCD display area 24. When the power is too low, the lithium battery can be charged through the USB interface.

Claims (10)

1. portable digital stethoscope, it is characterized in that, described stethoscope is by auscultation head, sebific duct, signal processing unit, ear piece, storage device, liquid crystal display and key-press module and power supply, described auscultation head is replaceable, realize the collection of acoustical signal, in described sebific duct, be provided with signal processing unit, acoustical signal is converted to digital signal, and digital signal is processed, digital signal is after digital-to-analogue conversion, can listen to by earphone in ear piece, described stethoscope can be selected auscultation pattern, capable of adjusting sound volume, the storage of can recording, timing, show heart rate, radio communication.

2. portable digital stethoscope according to claim 1, is characterized in that, described auscultation head is replaceable, between auscultation head and sebific duct, by being threaded, having 5 auscultation heads and is replaced, and is respectively two membranous type auscultation heads, three bell auscultation heads.

3. portable digital stethoscope according to claim 1, it is characterized in that, signal processing unit is provided with electret capcitor microphone, signal amplification circuit, programmable filter circuit, audio coder or analog to digital conversion circuit, described electret capcitor microphone is converted to the signal of telecommunication by acoustical signal, described signal amplification circuit amplifies the signal of telecommunication, described programmable filter circuit has low frequency mode, high frequency mode, three kinds of full range patterns, medical worker can utilize button to select, described audio coder or analog to digital conversion circuit are converted to digital signal by the signal of telecommunication after conditioning.

4. portable digital stethoscope according to claim 1, is characterized in that, signal processing unit sound intermediate frequency decoder or D/A converting circuit, adjustable audio frequency power amplifier, be converted to the signal of telecommunication by digital signal, and the signal of telecommunication is amplified to drive earphone.

5. portable digital stethoscope according to claim 1, is characterized in that, embeds earphone in ear piece, by earphone interface, is connected with the adjustable audio frequency power amplifier in signal processing unit.

6. portable digital stethoscope according to claim 1, is characterized in that, described scalable stethoscope pattern, capable of adjusting sound volume, select by button.

7. portable digital stethoscope according to claim 1, is characterized in that, described recorded storage, and storage file is placed in SD card, can be by USB interface and compunlcation.

8. portable digital stethoscope according to claim 1, is characterized in that, described LCDs can displaying time and heart rate.

9. portable digital stethoscope according to claim 1, is characterized in that, described radio communication completes based on zigbee agreement, can communicate by letter with same money stethoscope, computer, PDA.

10. portable digital stethoscope according to claim 1, is characterized in that, described power acquisition is powered to stethoscope with chargeable lithium cell, can be by USB interface to lithium cell charging.

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