CN104783834A - Electronic stethoscope - Google Patents
Electronic stethoscope Download PDFInfo
- Publication number
- CN104783834A CN104783834A CN201510217885.5A CN201510217885A CN104783834A CN 104783834 A CN104783834 A CN 104783834A CN 201510217885 A CN201510217885 A CN 201510217885A CN 104783834 A CN104783834 A CN 104783834A
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- China
- Prior art keywords
- foot
- dsp
- electronic stethoscope
- resistance
- audio
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000002555 auscultation Methods 0.000 claims abstract description 30
- 230000005236 sound signal Effects 0.000 claims description 6
- 230000003321 amplification Effects 0.000 claims description 5
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 4
- 210000001699 lower leg Anatomy 0.000 claims description 3
- 210000003128 head Anatomy 0.000 abstract description 24
- 238000003745 diagnosis Methods 0.000 abstract description 3
- 230000035479 physiological effects, processes and functions Effects 0.000 abstract 2
- 210000003454 tympanic membrane Anatomy 0.000 abstract 1
- 210000000959 ear middle Anatomy 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 210000004072 lung Anatomy 0.000 description 3
- 210000001835 viscera Anatomy 0.000 description 3
- 230000006378 damage Effects 0.000 description 2
- 206010013886 Dysaesthesia Diseases 0.000 description 1
- 208000009205 Tinnitus Diseases 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 208000035824 paresthesia Diseases 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 231100000886 tinnitus Toxicity 0.000 description 1
Abstract
The invention discloses an electronic stethoscope. The electronic stethoscope comprises an auscultation head, a listening pipe and ear plugs which are sequentially connected; a sound pick-up device is arranged on the side, attached to the body, of the auscultation head and is connected with a function circuit board, a power module for supplying power is arranged in the auscultation head, the function circuit board transmits a physiology sound which is detected by the sound pick-up device to the ear plugs after the physiology sound is amplified by an amplifier, the sound pick-up device is connected with the function circuit board through an elastic piece, the end, far away from the sound pick-up device, of the elastic piece is connected to a pressure sensor, a sensed voltage signal is transmitted through the pressure sensor to the amplifier to be amplified, the amplified sensed voltage signal enters a comparator and a DSP, the DSP starts a power amplifier when it is monitored that the sensed voltage signal reaches a present value, and the auscultation sounds are output into the ear plugs. By means of the electronic stethoscope, the eardrum of a doctor can be effectively protected, and the diagnosis accuracy can be improved.
Description
Technical field
The present invention relates to technical field of medical instruments, particularly relate 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.
Summary of the invention
For this reason, the technical problem to be solved in the present invention 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, the present invention 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 described helical spring other end 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 invention at least has following beneficial effect compared to existing technology:
Electronic stethoscope of the present invention 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 invention be more likely to be clearly understood, below in conjunction with accompanying drawing, the present invention is further detailed explanation, wherein:
Fig. 1 is the structural representation of the auscultation head of electronic stethoscope of the present invention;
Fig. 2 is the structural representation of electronic stethoscope of the present invention;
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 described helical spring other end 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 technical scheme of the present invention; the present invention has more than and is only confined to above-described embodiment; those skilled in the art should be understood that; every improvement on basis of the present invention according to above-mentioned principle and spirit, substitute, all should within protection scope of the present invention.
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. according to the arbitrary described electronic stethoscope of claim 1-4, it 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 described helical spring other end 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510217885.5A CN104783834B (en) | 2015-04-30 | 2015-04-30 | A kind of electronic auscultation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510217885.5A CN104783834B (en) | 2015-04-30 | 2015-04-30 | A kind of electronic auscultation device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104783834A true CN104783834A (en) | 2015-07-22 |
| CN104783834B CN104783834B (en) | 2017-12-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510217885.5A Active CN104783834B (en) | 2015-04-30 | 2015-04-30 | A kind of electronic auscultation device |
Country Status (1)
| Country | Link |
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| CN (1) | CN104783834B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106037788A (en) * | 2016-06-27 | 2016-10-26 | 天津润言医疗科技有限公司 | Injury-preventing auscultation apparatus |
| CN112057104A (en) * | 2020-09-18 | 2020-12-11 | 岳池县人民医院 | Stethoscope for cardiology department |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106037788A (en) * | 2016-06-27 | 2016-10-26 | 天津润言医疗科技有限公司 | Injury-preventing auscultation apparatus |
| CN112057104A (en) * | 2020-09-18 | 2020-12-11 | 岳池县人民医院 | Stethoscope for cardiology department |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104783834B (en) | 2017-12-05 |
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Effective date of registration: 20240117 Address after: 518000 12th floor, building 1, Baiwang R & D building, 5158 xilishahe West Road, Nanshan District, Shenzhen City, Guangdong Province Patentee after: Shenzhen maiketian Biomedical Technology Co.,Ltd. Address before: Room 202, North Side, Building B, Building 2, Independent R&D Building, No. 14 Longshan Road, Science and Technology City, High tech Zone, Suzhou City, Jiangsu Province, 215163 Patentee before: SUZHOU BEILAIFU MEDICAL TECHNOLOGY CO.,LTD. |