CN204581328U - A kind of electronic stethoscope - Google Patents

A kind of electronic stethoscope Download PDF

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Publication number
CN204581328U
CN204581328U CN201520277012.9U CN201520277012U CN204581328U CN 204581328 U CN204581328 U CN 204581328U CN 201520277012 U CN201520277012 U CN 201520277012U CN 204581328 U CN204581328 U CN 204581328U
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Prior art keywords
foot
dsp
resistance
pick
electronic stethoscope
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CN201520277012.9U
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Chinese (zh)
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陆玉林
陆鉴良
丁衍
章军辉
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Suzhou Bei Laifu Medical Science And Technology Co Ltd
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Suzhou Bei Laifu Medical Science And Technology Co Ltd
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Abstract

The utility model discloses a kind of electronic stethoscope, it comprises the auscultation head connected in turn, listening tube and earplug, described auscultation head the side attaching health is provided with pick up, described pick up is connected with functional circuit plate, the power module for powering is provided with in described auscultation head, the physiological sound that described pick up is detected by described functional circuit plate is passed to described earplug after amplifier amplifies, described pick up is connected with described functional circuit plate by elastic component, one end away from described pick up of described elastic component is connected on pressure transducer, induced voltage signal is passed to described amplifier and amplifies by described pressure transducer, described induced voltage signal after amplification enters comparator and DSP, described DSP monitors when described induced voltage signal reaches preset value and opens power amplifier, and auscultated sound is outputted in earplug.Electronic stethoscope of the present utility model can available protecting doctor tympanum, and can improve diagnostic accuracy.

Description

A kind of electronic stethoscope
Technical field
This utility model relates to technical field of medical instruments, particularly relates to a kind of electronic stethoscope.
Background technology
Stethoscope is the diagnostic tool that doctor commonly uses, and traditional acoustic stethoscope structure is simple, capacity of resisting disturbance is poor, diagnoses not accurate enough.Along with the progress of electronic technology, electronic stethoscope is accurate with its diagnosis, noise resistance interference performance is widely used more by force and progressively.But in the circuit of existing electronic stethoscope, generally all need to arrange amplifier, be sent in earplug after the sound that auscultation head can be detected by this amplifier amplifies, and then guarantee that doctor can hear volume appropriateness and physiological sound (hear sounds, lungs sound, internal organs sound etc.) clearly.But in real process, there will be auscultation head unavoidably drop or collide on other object, the impact sound of auscultation head will go out send the larger sound at earplug after amplifier amplifies, if now earplug is still filled in the auricle of doctor, larger injury can be caused to the audition of doctor, doctor even can be made to occur temporary tinnitus or damage tympanum, and doctor's auditory dysesthesia can be caused after permanent use, impact diagnosis.
Utility model content
For this reason, the technical problems to be solved in the utility model overcomes existing electronic stethoscope above shortcomings, and then provide one that earplug sound when colliding can be avoided excessive, and then the Novel electronic stethoscope of available protecting doctor audition.
For achieving the above object, this utility model is by the following technical solutions:
A kind of electronic stethoscope, it comprises the auscultation head connected in turn, listening tube and earplug, described auscultation head the side attaching health is provided with pick up, described pick up is connected with functional circuit plate, the power module for powering is provided with in described auscultation head, the physiological sound that described pick up is detected by described functional circuit plate is passed to described earplug after amplifier amplifies, described pick up is connected with described functional circuit plate by elastic component, one end away from described pick up of described elastic component is connected on pressure transducer, induced voltage signal is passed to described amplifier and amplifies by described pressure transducer, described induced voltage signal after amplification enters comparator and DSP, described DSP monitors when described induced voltage signal reaches preset value and opens power amplifier, and auscultated sound is outputted in earplug.
Preferably, connecting circuit between described pressure transducer with described DSP is: the outfan of described pressure transducer is by being connected with the tripod of operational amplifier U1 after resistance R7, the tripod of described operational amplifier U1 is connected with its first foot by after resistance R5, and electric capacity C1 is in parallel with described resistance R5; The tripod of described operational amplifier U1 is by ground connection after electric capacity C3; 4th foot of described operational amplifier U1 is by ground connection after resistance R6, and electric capacity C2 is in parallel with described resistance R6; First foot of described operational amplifier U1 is connected with the tripod of operational amplifier U2 by after resistance R4, and the 4th foot of described operational amplifier U2 is connected with resistance R1, R2 respectively, and first foot of described operational amplifier U2 outputs voltage signal to the input of DSP.
Preferably, connecting circuit between described DSP with described earplug is: first output interface of described DSP is connected with first foot of audio-frequency power amplifier U3, second output interface of described DSP is connected with the 4th foot of described audio-frequency power amplifier U3 by after electric capacity C23, resistance R20 successively, 4th foot of described audio-frequency power amplifier U3 is connected with the 5th foot of described audio-frequency power amplifier U3 by after resistance R22,5th foot of described audio-frequency power amplifier U3 is connected with the both positive and negative polarity of loudspeaker respectively with octal, the external output audio signal of described loudspeaker.
Preferably, the crus secunda of described audio-frequency power amplifier U3 and/or tripod, by ground connection after electric capacity C22, are arranged between the 6th foot of described audio-frequency power amplifier U3 and the 7th foot after electric capacity C18, C19 parallel connection.
Preferably, second output interface of described DSP is by ground connection after resistance R21.
Preferably, the second output interface output audio signal of described DSP, the first output interface output work of described DSP decontrols OFF signal.
Preferably, described audio-frequency power amplifier U3 is LM4871 audio-frequency power amplifier.
Preferably, described pick up is mike, and described elastic component is coil spring, and one end of described coil spring is connected with described mike, and the other end of described coil spring is connected with described pressure transducer.
Preferably, described functional circuit plate is integrated with the bluetooth module for data wireless transmission.
Preferably, described power module is aneroid battery, and described aneroid battery is arranged in the housing of described auscultation head.
Electronic stethoscope of the present utility model at least has following beneficial effect compared to existing technology:
Electronic stethoscope of the present utility model is by being arranged on auscultation head by pick up elasticity, and pressure transducer is set between pick up and functional circuit plate, DSP (Digital Signal Processing), only auscultation head suitable by being pressed in patient, and during certain time, voicefrequency circuit can be connected, and then make doctor listen to the hear sounds of patient by earplug, lungs sound, the physiological sounds such as internal organs sound, and when pressure transducer be not under pressure compressing or pressing time fall short of (of short duration shock) time, voicefrequency circuit is in off-state all the time, even if now auscultation head is surprisingly dropped or is collided with, the sound of its collision also can not be exaggerated and be passed to doctor's in ear, and then can be good at protecting the tympanum of doctor healthy.
Accompanying drawing explanation
In order to make content of the present utility model be more likely to be clearly understood, below in conjunction with accompanying drawing, this utility model is described in further detail, wherein:
Fig. 1 is the structural representation of the auscultation head of electronic stethoscope of the present utility model;
Fig. 2 is the structural representation of electronic stethoscope of the present utility model;
Fig. 3 is the connecting circuit between pressure transducer and DSP;
Fig. 4 is the connecting circuit between DSP and earplug.
In figure, Reference numeral is expressed as:
1-auscultation head; 2-listening tube; 3-earplug; 4-pick up; 5-functional circuit plate; 6-power module; 7-elastic component; 8-pressure transducer; 9-bluetooth module; 10-loudspeaker.
Detailed description of the invention
See Fig. 1-2, a kind of electronic stethoscope, it comprises the auscultation head 1, listening tube 2 and the earplug 3 that connect in turn, described auscultation head 1 the side attaching health is provided with pick up 4, described pick up 4 is connected with functional circuit plate 5, the power module 6 for powering is provided with in described auscultation head 1, described power module 6 is aneroid battery, described aneroid battery is arranged in the housing of described auscultation head 1, so that change power supply in time, and be easy to carry, can certainly be the power supply of other type, as accumulator etc.The physiological sound that described pick up 4 is detected by described functional circuit plate 5 is passed in described earplug 3 after amplifier amplifies, described pick up 4 is connected with described functional circuit plate 5 by elastic component 7, one end away from described pick up 4 of described elastic component 7 is connected on pressure transducer 8, induced voltage signal is passed to described amplifier and amplifies by described pressure transducer 8, described induced voltage signal after amplification enters comparator and DSP, described DSP monitors when described induced voltage signal reaches preset value and opens power amplifier, and auscultated sound is outputted in earplug.When the actual use of doctor, auscultation head with pressure transducer is pressed on patient body gently, elastic component is compressed, and then the pressure transducer of the compressing elastic component other end, pressure transducer will produce induced voltage signal, and induced voltage signal is by after amplifier filter and amplification, signal enters comparator and compares rear output and whether press signal, if this Signal aspects compressing time is more than 2 seconds, DSP just goes to open power amplifier, and sound is outputted to earphone by loudspeaker 10.Same, auscultation head 1 is taken from human body after 2 seconds, and signal just goes and closes power amplifier.
The electronic stethoscope of the present embodiment is by being arranged on auscultation head by pick up elasticity, and comparator and pressure transducer are set between pick up and functional circuit plate, only have when auscultation head suitable by when being pressed in patient, pick up is by elastic component compressive pressure sensor, default compressed value is received when comparator detects pressure transducer, and compressing time is when reaching preset value, voicefrequency circuit can be connected, and then make doctor listen to the hear sounds of patient by earplug, lungs sound, the physiological sounds such as internal organs sound, and when pressure transducer be not under pressure compressing or pressing time fall short of time, voicefrequency circuit is in off-state all the time, even if now auscultation head is surprisingly dropped or is collided with, the sound of its collision also can not be exaggerated and be passed to doctor's in ear, and then can be good at protecting the tympanum of doctor healthy.
See Fig. 3, described pressure transducer 8 with the connecting circuit between described DSP is: the outfan of described pressure transducer 8 is by being connected with the tripod of operational amplifier U1 (for filter and amplification) after resistance R7, the tripod of described operational amplifier U1 is connected with its first foot by after resistance R5, and electric capacity C1 is in parallel with described resistance R5; The tripod of described operational amplifier U1 is by ground connection after electric capacity C3; 4th foot of described operational amplifier U1 is by ground connection after resistance R6, and electric capacity C2 is in parallel with described resistance R6; First foot of described operational amplifier U1 by after resistance R4 with operational amplifier U2 (for comparing, also i.e. comparator) tripod connect, 4th foot of described operational amplifier U2 is connected with resistance R1, R2 respectively, and first foot of described operational amplifier U2 outputs voltage signal to the input of DSP.
See Fig. 4, connecting circuit between described DSP with earplug 3 is: first output interface of described DSP is connected with first foot of audio-frequency power amplifier U3, second output interface of described DSP is successively by electric capacity C23, be connected with the 4th foot of described audio-frequency power amplifier U3 after resistance R20, 4th foot of described audio-frequency power amplifier U3 is connected with the 5th foot of described audio-frequency power amplifier U3 by after resistance R22, 5th foot of described audio-frequency power amplifier U3 is connected with the both positive and negative polarity of described loudspeaker respectively with octal, described loudspeaker 10 are output audio signal externally, and imported in doctor's ear by earplug 3.
In the present embodiment, the crus secunda of amplifier U3 and/or tripod are by ground connection after electric capacity C22, be arranged on after electric capacity C18, C19 parallel connection between the 6th foot of described audio-frequency power amplifier U3 and the 7th foot, second output interface of described DSP is by ground connection after resistance R21, the second output interface output audio signal of described DSP, the first output interface output work of described DSP decontrols OFF signal.
In the present embodiment, described audio-frequency power amplifier U3 is LM4871 audio-frequency power amplifier.
In the present embodiment, described pick up 4 is mike, and described elastic component 7 is coil spring, and one end of described coil spring is connected with described mike, and the other end of described coil spring is connected with described pressure transducer.
In the present embodiment, described functional circuit plate 5 is integrated with the bluetooth module for data wireless transmission.By arranging bluetooth module, auscultation information can be passed in computer, so that carry out subsequent analysis and the measurement of data; And bluetooth module volume is little, be convenient to save space, energy consumption is little, and data transmission is comparatively stable.
Above-mentioned detailed description of the invention is just explained in detail the technical solution of the utility model; this utility model has more than and is only confined to above-described embodiment; those skilled in the art should be understood that; every improvement on this utility model basis according to above-mentioned principle and spirit, substitute, all should within protection domain of the present utility model.

Claims (10)

1. an electronic stethoscope, it comprises the auscultation head connected in turn, listening tube and earplug, described auscultation head the side attaching health is provided with pick up, described pick up is connected with functional circuit plate, the power module for powering is provided with in described auscultation head, the physiological sound that described pick up is detected by described functional circuit plate is passed to described earplug after amplifier amplifies, it is characterized in that: described pick up is connected with described functional circuit plate by elastic component, one end away from described pick up of described elastic component is connected on pressure transducer, induced voltage signal is passed to described amplifier and amplifies by described pressure transducer, described induced voltage signal after amplification enters comparator and DSP, described DSP monitors when described induced voltage signal reaches preset value and opens power amplifier, and auscultated sound is outputted in earplug.
2. electronic stethoscope according to claim 1, it is characterized in that: the connecting circuit between described pressure transducer with described DSP is: the outfan of described pressure transducer is by being connected with the tripod of operational amplifier U1 after resistance R7, the tripod of described operational amplifier U1 is connected with its first foot by after resistance R5, and electric capacity C1 is in parallel with described resistance R5; The tripod of described operational amplifier U1 is by ground connection after electric capacity C3; 4th foot of described operational amplifier U1 is by ground connection after resistance R6, and electric capacity C2 is in parallel with described resistance R6;
First foot of described operational amplifier U1 is connected with the tripod of operational amplifier U2 by after resistance R4, and the 4th foot of described operational amplifier U2 is connected with resistance R1, R2 respectively, and first foot of described operational amplifier U2 outputs voltage signal to the input of DSP.
3. electronic stethoscope according to claim 1 and 2, it is characterized in that: the connecting circuit between described DSP with described earplug is: first output interface of described DSP is connected with first foot of audio-frequency power amplifier U3, second output interface of described DSP is successively by electric capacity C23, be connected with the 4th foot of described audio-frequency power amplifier U3 after resistance R20, 4th foot of described audio-frequency power amplifier U3 is connected with the 5th foot of described audio-frequency power amplifier U3 by after resistance R22, 5th foot of described audio-frequency power amplifier U3 is connected with the both positive and negative polarity of loudspeaker respectively with octal, the external output audio signal of described loudspeaker.
4. electronic stethoscope according to claim 3, it is characterized in that: the crus secunda of described audio-frequency power amplifier U3 and/or tripod, by ground connection after electric capacity C22, are arranged between the 6th foot of described audio-frequency power amplifier U3 and the 7th foot after electric capacity C18, C19 parallel connection.
5. electronic stethoscope according to claim 4, is characterized in that: second output interface of described DSP is by ground connection after resistance R21.
6. electronic stethoscope according to claim 5, is characterized in that: the second output interface output audio signal of described DSP, and the first output interface output work of described DSP decontrols OFF signal.
7. electronic stethoscope according to claim 6, is characterized in that: described audio-frequency power amplifier U3 is LM4871 audio-frequency power amplifier.
8. electronic stethoscope according to claim 1, it is characterized in that: described pick up is mike, described elastic component is coil spring, and one end of described coil spring is connected with described mike, and the other end of described coil spring is connected with described pressure transducer.
9. electronic stethoscope according to claim 1, is characterized in that: described functional circuit plate is integrated with the bluetooth module for data wireless transmission.
10. electronic stethoscope according to claim 1, is characterized in that: described power module is aneroid battery, and described aneroid battery is arranged in the housing of described auscultation head.
CN201520277012.9U 2015-04-30 2015-04-30 A kind of electronic stethoscope Active CN204581328U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104783834A (en) * 2015-04-30 2015-07-22 苏州贝莱弗医疗科技有限公司 Electronic stethoscope
CN105852902A (en) * 2016-04-26 2016-08-17 江苏物联网研究发展中心 Method and system for switching auscultation frequency range of electronic auscultator
CN112472121A (en) * 2020-11-30 2021-03-12 中山大学孙逸仙纪念医院 In-ear objective tinnitus diagnosis device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104783834A (en) * 2015-04-30 2015-07-22 苏州贝莱弗医疗科技有限公司 Electronic stethoscope
CN105852902A (en) * 2016-04-26 2016-08-17 江苏物联网研究发展中心 Method and system for switching auscultation frequency range of electronic auscultator
CN112472121A (en) * 2020-11-30 2021-03-12 中山大学孙逸仙纪念医院 In-ear objective tinnitus diagnosis device

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