A kind of wireless auscultation system based on double frequency collection and vibration reductionTechnical field
The present invention relates to a kind of medical diagnostic systems, more particularly, to a kind of wirelessly listening based on double frequency collection and vibration reductionExamine system.
Background technology
Conventional physical stethoscope：It is the effective means by the external sound obtaining human viscera organ's activity, itForm an airtight cavity after wearing together with human body cochlea using airtight pipeline, pass through to gather vibrating diaphragm suction using resonance principleGet into the frame of mind for work lung vibrational energy, collection vibrating diaphragm and cardiopulmonary produce air in compression closed conduit after synchronous vibration by this conduct vibrations extremelyTympanum at cochlea, is allowed to produce corresponding synchronous vibration signal, thus allowing user can hear heart and lung sounds, some are high-endFrequency conversion physics stethoscope, can be by the tract of the different bore of switching, and the audio signal realized to a certain extent is amplified.However,There is the drawbacks such as the external auditory meatus leading to due to pressure pipe stress problems is uncomfortable, tonequality is easily disturbed, meanwhile, Jin Jintong in conventional stethoscopeThe tract crossing the different bore of switching carries out signal amplification, and its enlargement ratio is just extremely limited, and the mode of physics carries out audio frequency amplificationAlso background noise synchronously can be amplified.Cause doctor cannot make diagnosis, and the foundation mainly warp according to doctor diagnosing in timeTest, accuracy is poor.Say from another angle, human ear is to the comprehensive effect that the sensitivity of sound is the sound intensity and frequency, thus some are sickReason feature is difficult to catch.This be accomplished by designing a kind of stethoscope of novelty auscultatory sound is carried out quantitative, accurately analyze.
Medical electronic stethoscope：Typically by visiting sound head, acoustical signal can be converted electrical signals to equipped with miniature pick upEarplug and an amplifier concatenation being made up of electronic component form, and it can try to find out human internal organ sound in real time, and can pass throughAmplifier circuit for sound frequency signal amplifies snooping human internal organ message number so that slight physiological and pathologic sound are more traditionalPhysics stethoscope loudness of a sound is higher, and these sound can be stored playback, is available for clinical analysis of diagnosis and medical history information preserves and is used.But existing medical electronic stethoscope all carries out the collection of sound using single pick up, therefore noise can ratio larger, and onlyAmplified by signal and improve volume, while such target heart sound amplifies, interfering noise also can amplify therewith, therefore easily at certainIn the case of a little, some pathological characters are difficult to catch and even can cause mistaken diagnosis, and its degree of reliability is even not as traditional physics is listened sometimesExamine device.Meanwhile, vibration signal forms digitized audio it is impossible to effectively reduce original vibration signal after pick up collectionDetails, is that earphone carries out signals revivification distortion seriously by conventional air vibrating speaker, is unfavorable for effective judgement of doctor.
Bluetooth electronic stethoscope：With the continuous development of Bluetooth technology, occur in that 3M, EKO, Clinicould etc. are a series ofBased on the household or medical Bluetooth electronic stethoscope of blue tooth wireless technology, it is by the heart on the basis of original electronic stethoscopeThe audio signal of dirty, pulmonary and other organs is wirelessly transmitted to and is stored on computer or the app software of handheld device, andBy software, the audio files storing can be shown with curve form, more accurately can disclose than electronic stethoscope before thisPatient's heart abnormal phenomena that may be present.The stethoscope of the 3200BK series of 3M, has also done noise reduction process using ANR technology,Improve audio quality during doctor's auscultation it is also possible to playback speed reduction half is more thoroughly analyzed problem moreover it is possible to by literary compositionPart is saved in the inspection result of patient, and sends it to cardiologist by Email, APP or remote interaction softwareTo realize remote diagnosis, to confirm diagnostic result.So that heart sounds is visualized, be easy to share anywhere or anytime, integrate preservation electronicsCase history.But the real time remote that such stethoscope cannot realize sound is shared it is necessary to store audio signal, then with fileForm is sent to far-end by internet and just can achieve long-range data sharing.The real-time of its audio frequency just poor it is impossible toCarry out real-time pathological diagnosis for patient, especially cannot real-time diagnosis under the fast changing emergency situation of conditions of patientsThe diagnosis to the state of an illness can be greatly delayed and delay optimal therapic opportunity.Meanwhile, such product be substantially all remain originalStethoscope profile and structure, or audio playback can be realized by wired earphone, this brings to the use of medical workerCertain inconvenience, in data acquisition, vibration signal is converted to audio digital signals simultaneously, adds that ANR noise reduction process can be to formerThe loss of beginning audio frequency increases further, leads to audio signal serious with primary signal contrast distortion, its playback technology adopts airVibrating speaker is played back with reference to conventional physical stethoscope conduit, and sound wave is conducted by air in loudspeaker vibration compression tubeTo tympanum, it is easily caused and is also easy to produce the sluggish audible difference of cavity audio frequency in auscultation, need to re-establish new auscultation system sidePathological state can effectively be identified.
Content of the invention
Present invention seek to address that above-mentioned mentioned technical problem, provide a kind of nothing based on double frequency collection and vibration reductionLine auscultation system, includes signal acquisition terminal and signal processing end；Signal acquisition terminal includes the ECG collection of the real-time heart rate of human bodyThe vibration signal of module and two some people body-centered lungs devices is converted to the audio collection module of audio signal；Signal processing end includesHave and turn for the noise reduction process module reducing the environmental noise in audio signal, signal audio signal being converted to digital signalDie change block and vibration recovery module digital signal being converted to vibration signal, noise reduction process module, signal conversion module andVibration recovery module is sequentially connected, and the input of noise reduction process module connects two audio collection module, vibration recovery moduleOutfan connects the tympanum of human body；Described audio signal includes intentionally message number and Lung Sounds, and signal processing end also includesContrast the signal calibration module of real-time heart rate and cardiechema signals.
Preferably, the real-time heart rate that ECG acquisition module can be collected and audio collection module collection are also includedTo audio signal pass through the wireless transport module on remote terminal for the wireless transmission.
Preferably, wireless transmission method is Bluetooth signal transmission mode, the Internet transmission mode or ZIGBEE signal transmissionMode.
Preferably, remote terminal is signal processing end, mobile phone terminal or PC end.
Preferably, the real-time heart rate that ECG acquisition module can be collected and audio collection module collection are also includedTo the data storage module that gets up of audio signal storage, wireless transport module can in data storage module storage real-timeHeart rate and audio signal transmission are on remote terminal.
Preferably, also include the playback module of the real-time heart rate of storage and audio signal in data storage module.
Preferably, signal calibration module is connected with the display module of the real-time heart rate after calibration and audio signal.
Preferably, signal calibration module includes the extraction list of abnormal data in real-time heart rate and cardiechema signals comparison processUnit.
Preferably, vibration recovery module includes the amplifying unit of vibration signal.
Preferably, also include wireless charging module.
Beneficial effect is：Compared with prior art, a kind of of the present invention is wirelessly listened based on what double frequency collection and vibration reducedExamine the setting that system can be separated from each other between signal acquisition terminal and signal processing end in structure, each other by wireless skillArt is completing data transfer；Meanwhile, the signal that signal acquisition terminal collects can also by way of being wirelessly transferred real-time TransmissionTo mobile phone terminal, PC end, on multiple remote terminal such as cloud database, to realize the Real-Time Sharing of data signal it might even be possible to lead toCross Email, APP or remote interaction software to be sent to cardiologist to realize remotely examining by audio-frequency information and real-time heart rateDisconnected, confirm diagnostic result, so that heart sounds is visualized, be easy to share anywhere or anytime, integrate preservation electronic health record, by networkThe remotely real-time high in the clouds that technology can also realize the data such as audio-frequency information and real-time heart rate is shared, you can by the cardiopulmonary of patientIn local and long-range multiple terminals, reproduced in synchronization is out in real time for sound, ECG heart rate signal, it is possible to achieve trulyRemote Diagnosis System.
Contrasted by the audio signal that noise reduction process module collects to the audio collection module of two different loci,The wave spectrum finding out environmental noise the environmental noise balancing out more than 93% by way of function is processed, the audio frequency letter after noise reductionNumber be converted to digital signal through signal conversion module again, through vibration recovery module, digital signal be reduced to vibration signal simultaneouslyHuman body can be fed directly to, allow user can obtain and auscultation closest with conventional physical stethoscope use feelingThe relatively sharp glitch-free experience of effect is so that doctor can make more to the physiological of human body and pathologic internal organs soundEffectively judge.
Collect the real-time heart rate of human body simultaneously using the ECG acquisition module in 3 sites, collect with audio collection moduleHeart sound frequency carry out comparison calibration conversion so that the result of real-time heart rate forms more accurately and effectively figure after calibrationWave spectrum simultaneously shows in display module in real time, more has clinical reference meaning than traditional heart rate or pure heart sound collection playback wave spectrumJustice, more conducively clinician make effective judgement.And real-time heart rate and audio signal can also be led to by wireless auscultation systemCross wireless transport module be transferred to playback module, mobile phone terminal, in PC end or on the facility such as cloud network server, mobile phone terminal and PCEnd can automatically analyze these audio frequency vibration spectroscopic signals, and the calibration algorithm by audio signal and real-time heart rate with normalStandardized heart rate heart sound curve carries out contrast conversion, is accurately extracted by the signal that extraction unit will be prompted to abnormal conditions,Compare traditional audio frequency wave spectrum extraction more accurately more reliable.
Brief description
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail, wherein：
Fig. 1 is the module connection diagram of wireless auscultation system.
Specific embodiment
Wireless auscultation system be integrated with following examples：
Embodiment one
As shown in figure 1, a kind of wireless auscultation system based on double frequency collection and vibration reduction, include signal acquisition terminal 1 and letterNumber process end 2；Signal acquisition terminal 1 includes the ECG acquisition module 11 of the real-time heart rate of human body and two some people body-centered lungs devicesVibration signal is converted to the audio collection module 12 of audio signal；Signal processing end 2 includes for reducing in audio signalThe noise reduction process module 21 of environmental noise, audio signal is converted to digital signal signal conversion module 22 and numeral letterNumber be converted to the vibration recovery module 23 of vibration signal, noise reduction process module 21, signal conversion module 22 and vibration recovery module23 are sequentially connected, and the input of noise reduction process module 21 connects two audio collection module 12, the output of vibration recovery module 23End connects the tympanum of human body；Described audio signal includes intentionally message number and Lung Sounds, and signal processing end 2 also includes contrastThe signal calibration module 4 of heart rate and cardiechema signals in real time.
Further have, wireless auscultation system also include the real-time heart rate that ECG acquisition module 11 can be collected withAnd the audio signal that collects of audio collection module 12 passes through wireless transmission and is wirelessly transferred mould on remote terminalBlock 3.Wireless transmission method can be Bluetooth signal transmission mode, the Internet transmission mode or ZIGBEE signal transmission form, farJourney terminal can be signal processing end 2, mobile phone terminal or PC end.By wireless transmission method, signal acquisition terminal 1 and signal processing endThe setting being separated from each other between 2, completes data transfer by wireless technology each other；Meanwhile, signal acquisition terminal 1 is adoptedThe signal collecting can also be real-time transmitted to mobile phone terminal, PC end by way of being wirelessly transferred, and cloud database etc. is multiple long-rangeIn terminal, to realize the Real-Time Sharing of data signal it might even be possible to by Email, APP or remote interaction software by audio frequencyInformation and real-time heart rate are sent to cardiologist to realize remote diagnosis, confirm diagnostic result, so that heart sounds is visualized, justShare in anywhere or anytime, integrate preservation electronic health record, audio-frequency information and real-time heart rate etc. can also be realized by network technologyData remotely in real time high in the clouds share, you can by the heart and lung sounds of patient, ECG heart rate signal in real time local and long-range manyIn individual terminal, reproduced in synchronization is out, it is possible to achieve Remote Diagnosis System truly.
Noise reduction process module 21 in embodiment one, signal conversion module 22 and vibration recovery module 23 have following enforcementExample：
Embodiment two
The wireless auscultation system of the present embodiment is different from the ANR master of 3M by the lower chain noise reduction algorithm of ANC environment resistant noise technologyDynamic noise reduction technology, using the audio collection module 12 of two different loci, the cardiopulmonary producing at linear synchronous collection vibrating diaphragm are dirtyDevice vibration audio signal and background environment noise, are processed by the function of DSP and produce acoustics anti-phase wave spectrum counteracting noise wave spectrum,Algorithmically it is integrated revising and reduce the interference of more than 93% Background environmental noise, utilize the tonequality of missing fundamental simultaneouslyConversion principle improves the reproduction efficiency of bass target frequency.
Embodiment three
The wireless auscultation system of the present embodiment then carries out Electric signal processing through CODEC and DSP in audio signal after noise reductionAnd it is ultimately converted to digital signal.
Example IV
The wireless auscultation system of the present embodiment, after audio signal is converted to digital signal, vibrates frequency by using with reference to human brainRate returns translation function recognizer HRTF, and digital signal is reduced to vibration signal, allows the signal that vibrating diaphragm collects can be againSecondary recurrence is converted to relatively sharp vibration signal, and user can be obtained with conventional physical stethoscope use feelingIt is close, and the relatively sharp glitch-free experience of auscultation effect is so that doctor can be to the physiological of human body and pathologicInternal organs sound make more effective judgement.
Digital signal is preferably entered to the amplitude of vibration signal by amplifying unit 231 during being converted to vibration signalRow amplifies so that the diagnosis effect of doctor is more preferable.
The processing mode of the real-time heart rate in embodiment one and audio signal has following examples：
Embodiment five
Wireless auscultation system includes the real-time heart rate collecting and audio collection module 12 can be adopted ECG acquisition module 11The data storage module that the audio signal storage collecting gets up, wireless transport module 3 can be storage in data storage moduleHeart rate and audio signal transmission are on remote terminal in real time.Wireless auscultation system also includes the reality of storage in data storage moduleWhen heart rate and audio signal playback module 5.Signal calibration module 4 is connected with the aobvious of the real-time heart rate after calibration and audio signalShow module 6.Signal calibration module 4 includes the extraction unit 41 of abnormal data in real-time heart rate and cardiechema signals comparison process.
The wireless auscultation system of the present embodiment, while gathering audio signal, is gathered by ECG acquisition module 11 in real timeHeart rate simultaneously forms ECG waveform, and audio signal includes cardiechema signals and the Lung Sounds of someone's body, and cardiechema signals and real-time heart rate existCarry out comparison calibration conversion in the presence of signal calibration module 4 so that ECG waveform through calibration after can be formed more accurateEffectively figure wave spectrum, the ECG waveform of the real-time heart rate after calibration can also with normal standardized heart rate heart sound curve carry out rightRatio conversion, is extracted exactly by the part signal that extraction unit 41 will be prompted to abnormal conditions, compares traditional audio waveSpectrum extracting mode is more accurately more reliable, more has clinical implications than traditional heart rate or pure heart sound collection playback wave spectrum, moreMake effective judgement beneficial to clinician.
And real-time heart rate and audio signal can also be passed through wireless transport module 3 by the wireless auscultation system of the present embodimentBe transferred to playback module 5, mobile phone terminal, in PC end or on the facility such as cloud network server, mobile phone terminal and PC end can be divided automaticallyAnalyse these audio frequency vibration spectroscopic signals, and the calibration algorithm by audio signal and real-time heart rate and normal standardized heart rate heart soundCurve carries out contrast conversion, is accurately extracted by the signal that extraction unit 41 will be prompted to abnormal conditions, compares traditionalAudio frequency wave spectrum extracts more accurately more reliable.
Following examples are had based on the wireless stethoscope equipment of wireless auscultation system：
Embodiment six
The wireless stethoscope equipment of the present embodiment includes stethoscope main frame and bone conduction earphone, and signal acquisition terminal 1 is arranged on auscultationOn device main frame, signal processing end 2 is arranged on bone conduction earphone, and stethoscope main frame includes vibrating diaphragm.Audio frequency is provided with vibrating diaphragmAcquisition module 12, ECG acquisition module 11 is set directly on human body, is additionally provided with wireless transport module 3, no in stethoscope main frameLine transport module 3 is used for the audio frequency letter that the real-time heart rate that ECG acquisition module 11 is collected and audio collection module 12 collectNumber clearance bluetooth, the Internet or others are wirelessly transmitted to the noise reduction process module 21 on bone conduction earphone；In real timeHeart rate and audio signal can also be stored in data storage module, played back or passed through wireless biography by playback module 5Defeated module 3 sends data to remote terminal；Heart rate and audio signal equally can pass through wireless transport module 3 in real time in real timeIt is sent to remote terminal.Bone conduction earphone coordinates the mode of operation of stethoscope main frame to possess more preferable portability and ease for use,Vibration letter can be again reduced to the audio signal being converted into by vibration signal by the signal processing end 2 on bone conduction earphoneNumber, and it is directly sent to tympanum, possess higher signals revivification effect than conditional electronic stethoscope.
Embodiment one to five all has, and wireless auscultation system also includes wireless charging module, and wireless charging module is used for noThe overall radio operation of line auscultation system, convenient and swift.
Above example is only not limited in order to technical scheme to be described, all without departing from the present inventionAny modification of spirit and scope or equivalent, it all should be covered in the range of technical solution of the present invention.