CN208659396U - A kind of stethoscope with heart sound detection function - Google Patents
A kind of stethoscope with heart sound detection function Download PDFInfo
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- CN208659396U CN208659396U CN201721448120.3U CN201721448120U CN208659396U CN 208659396 U CN208659396 U CN 208659396U CN 201721448120 U CN201721448120 U CN 201721448120U CN 208659396 U CN208659396 U CN 208659396U
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- heart sound
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Abstract
The utility model discloses a kind of stethoscopes with heart sound detection function, including stethoscope ontology, stethoscope ontology includes auscultation head, sound guide tube, three-pronged connector and earpiece, resonance plate is equipped in auscultation head, stethoscope further includes heart sound transducer, signal amplification module, integration module, square wave module, base modules, comparison module and display module；Heart sound transducer is connected with signal amplification module, and signal amplification module is connected with integration module, and integration module and base modules are connected with comparison module respectively, and comparison module is connected with display module, and square wave module is connected with integration module.The utility model judges the power of patient's heart sound by the height of integration module output voltage signal, without relying on the self judgment of doctor, simultaneously the utility model circuit structure it is simple, single detection time expense is small, convenient in outpatient service link doctor to the quick diagnosis of numerous patients.The heart sound that the utility model is used to detect patient is strong and weak.
Description
Technical field
The utility model relates to electronic circuit technology fields, more specifically to a kind of electronic auscultation device.
Background technique
In existing medical service provider system, there are two the effect of outpatient service is main, first is treatment common disease, the other is
Promptly judge to be possible to the patient with major disease from patient, to make further diagnosis, i.e. outpatient service is main
It is responsible for the first visit to numerous patients to work.
The doctor in outpatient service that takes office usually is named as stethoscopic medical instrument using to one kind, and doctor is by stethoscope to just
The heart correlation circumstance for examining personnel diagnoses, and is mainly understood by heart sound situation of the stethoscope to patient,
The power of middle heart sound is a data of the main understanding of doctor.At present the overwhelming majority doctor all be by itself practise medicine through
It tests and judges that the heart sound of patient is strong and weak, lack judgment criteria, erroneous judgement probability is high.And it exists in the prior art a kind of with heart sound
The stethoscope of detection function can show caardiophonogram on display instrument, can greatly improve doctor to patient's heart
Sound diagnosis accuracy, but spend time it is longer, be unfavorable for applying in ambulatory care link, unfavorable outpatient service to it is numerous just
Examine the first visit work of personnel.
Utility model content
Technical problem to be solved by the utility model is: listening for patient's heart sound power can be detected rapidly by providing one kind
Examine device.
The solution that the utility model solves its technical problem is:
A kind of stethoscope with heart sound detection function, including stethoscope ontology, the stethoscope ontology include auscultation head, lead
Sound tube, three-pronged connector and earpiece, the auscultation head are connected with earpiece by three-pronged connector by sound guide tube, are set in the auscultation head
Have a resonance plate, the utility model further include heart sound transducer, signal amplification module, integration module, square wave module, base modules,
Comparison module and display module；The heart sound transducer output end is connected with signal amplification module input terminal, and the signal is put
Big module output end is connected with integration module input terminal, the integration module output end and base modules output end respectively with than
It is connected compared with module input, the comparison module output end is connected with display module input terminal, the square wave module and integral mould
Block is connected；The heart sound transducer is mounted on inside auscultation head and resonance plate mechanical oscillation signal is converted into electric signal.
As a further improvement of the above technical scheme, the heart sound transducer includes inductance coil and the constant magnetic of generation
The permanent magnet of field, the inductance coil are arranged on resonance plate, and the permanent magnet is mounted on inside auscultation head, the inductance coil
It is connected with signal amplification module input terminal.
As a further improvement of the above technical scheme, the signal amplification module includes that filter unit and amplification are single
Member, the filter unit are low-pass filter, and the heart sound transducer output end is connected with filter unit input terminal, the filtering
Unit output end is connected with amplifying unit input terminal, and the amplifying unit output end is connected with integration module input terminal.
As a further improvement of the above technical scheme, the filter unit includes capacitor C1, capacitor C2, resistance R1, electricity
Resistance R2, resistance R3, resistance R4 and transport and placing device A1, the resistance R1 and resistance R2 are connected on inductance coil and the same phase of transport and placing device A1
Between input terminal, the resistance R3 and resistance R4 are connected between transport and placing device A1 output end and ground terminal, and the transport and placing device A1 is anti-
Mutually input terminates at the tie point of resistance R3 and resistance R4, and the transport and placing device A1 output end is connect by capacitor C1 in resistance R1 and electricity
The tie point of R2 is hindered, the both ends the capacitor C2 are connected with transport and placing device A1 non-inverting input terminal with ground terminal respectively, the transport and placing device A1
Output end is connected with amplifying unit input terminal.
As a further improvement of the above technical scheme, the amplifying unit includes the amplifier core of model MAX9812
Piece, the filter unit output end are connected with amplifier chip input terminal, and the amplifier chip output end and integration module are defeated
Enter end to be connected.
As a further improvement of the above technical scheme, the integration module include diode D1, resistance R5, resistance R6,
Capacitor C3 and transport and placing device A2, the signal amplification module output end are connected with diode D1 anode, the diode D1 cathode
It is connected by resistance R5 with transport and placing device A2 non-inverting input terminal, the transport and placing device A2 inverting input terminal is grounded by resistance R6, described
The both ends capacitor C3 are connected with transport and placing device A2 non-inverting input terminal with output end respectively, and the transport and placing device A2 output end and comparison module are defeated
Enter end to be connected.
As a further improvement of the above technical scheme, the square wave module include 555 timers, resistance R7, resistance R8,
Capacitor C4 and two level switches, the resistance R7, resistance R8 and capacitor C4 connect between the powered end and the ground end, institute
It states the electric discharge of 555 timers to terminate between resistance R7 and resistance R8, the 555 Timer Threshold input terminal and triggering input terminal are equal
It connects between resistance R8 and capacitor C4,555 timer output end is connected with two level switch control terminals respectively, an electricity
The energization of flat switch control integration module and power end connects, another level switch controls the short circuit of capacitor C3 in integration module
Connection.
The beneficial effects of the utility model are: the utility model is turned resonance plate mechanical oscillation signal by heart sound transducer
It changes electric signal into, and integration operation is carried out to the electric signal, the height of the voltage signal exported by integration module judges indirectly
The power of patient's heart sound.The utility model can intelligent measurement go out patient in outpatient service heart sound it is strong and weak, without relying on
The self judgment of doctor, accuracy of judgement, while the utility model circuit structure is simple, single detection time expense is small, is convenient for
Quick diagnosis of the doctor to numerous patients in outpatient service link.The heart sound that the utility model is used to detect patient is strong and weak.
Detailed description of the invention
It, below will be to required in embodiment description in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
Attached drawing to be used is briefly described.Obviously, described attached drawing is a part of the embodiment of the utility model, rather than complete
Portion's embodiment, those skilled in the art without creative efforts, can also be obtained according to these attached drawings it
His design scheme and attached drawing.
Fig. 1 is the stethoscope structure schematic diagram of the utility model；
Fig. 2 is the schematic block circuit diagram of the utility model；
Fig. 3 is the signal amplification module embodiment schematic diagram of the utility model；
Fig. 4 is the integration module embodiment schematic diagram of the utility model；
Fig. 5 is the square wave module embodiments schematic diagram of the utility model.
Specific embodiment
It is carried out below with reference to technical effect of the embodiment and attached drawing to the design of the utility model, specific structure and generation
It clearly and completely describes, to be completely understood by the purpose of this utility model, feature and effect.Obviously, described embodiment
It is a part of the embodiment of the utility model, rather than whole embodiments, it is based on the embodiments of the present invention, the skill of this field
Art personnel other embodiments obtained without creative efforts belong to the model of the utility model protection
It encloses.In addition, all connection relationships being previously mentioned in text, not single finger element directly connects, and referring to can be according to specific implementation feelings
Condition, by adding or reducing connecting element, Lai Zucheng more preferably circuit structure.Each technical characteristic in the invention,
It can be with combination of interactions under the premise of not conflicting conflict.
Referring to Fig.1~Fig. 5, the utility model discloses a kind of stethoscopes with heart sound detection function, including stethoscope sheet
Body, the stethoscope ontology include auscultation head 1, sound guide tube 2, three-pronged connector 3 and earpiece 4, and the auscultation head 1 is by sound guide tube 2
Connected by three-pronged connector 3 with earpiece 4, be equipped with resonance plate in the auscultation head 1, the utility model further include heart sound transducer,
Signal amplification module, integration module, square wave module, base modules, comparison module and display module；The heart sound transducer is defeated
Outlet is connected with signal amplification module input terminal, and the signal amplification module output end is connected with integration module input terminal, described
Integration module output end and base modules output end are connected with comparison module input terminal respectively, the comparison module output end with
Display module input terminal is connected, and the square wave module is connected to control the energization of the integration module and power end with integration module
Connection；The heart sound transducer is mounted on 1 inside of auscultation head and resonance plate mechanical oscillation signal is converted into electric signal.Wherein institute
Square wave module is stated for exporting certain frequency, the pulse square wave signal that duty ratio is 50%, the frequency of pulse square wave signal can be with
It is the half of heartbeat frequency in the case of human normal, i.e., the described square wave Module cycle exports the height in a heartbeat period
Level, the low level in a heartbeat period.When square wave module exports high level, the logical of integration module and power end is connected
Electrical connection, make integration module to input signal carry out integration operation, when square wave module export low level when, disconnect integration module with
The energization of power end connects, and stops integration module operation, while initializing integration module, is the product in next heartbeat period
Operation is divided to prepare.The voltage magnitude of the output of integration module described in the utility model and intensity of heart sounds detected are in positive
It closes, the base modules are according to actual circuit element parameter and relevant medical domain knowledge, and output one for differentiating the heart
The weak reference voltage of loudness of a sound is recognized to comparison module input terminal when integration module output voltage is greater than base modules output voltage
It is normal for patient's intensity of heart sounds, and exported by display module, the display module may be mounted at three-pronged connector 3
On, it also can be set in other positions, by wireless communication module, such as bluetooth module and comparison module communication connection.
Specifically, resonance plate mechanical oscillation signal is converted into electric signal by heart sound transducer by the utility model, and right
The electric signal carries out integration operation, and the height of the voltage signal exported by integration module judges the strong of patient's heart sound indirectly
It is weak.The utility model can intelligent measurement go out patient in outpatient service heart sound it is strong and weak and shown by display module, nothing
The self judgment of doctor, accuracy of judgement need to be relied on, while the utility model circuit structure is simple, single detection time expense is small,
Convenient in outpatient service link doctor to the quick diagnosis of numerous patients.
It should be noted that although the utility model is related to the technological means of software program, but there is no carry out it
It improves, the utility model mainly improves hardware circuit involved in stethoscope.
It is further used as preferred embodiment, the heart sound transducer is used to acquire the ticktack message of heart of patient
Number, and convert thereof into electric signal.It is described in specific embodiment of the present invention to realize the heart sound transducer function
Heart sound transducer includes inductance coil and the permanent magnet for generating stationary magnetic field, and the inductance coil is arranged on resonance plate, institute
It states permanent magnet to be mounted on inside auscultation head 1, the inductance coil is connected with signal amplification module input terminal.Human heart it is each
Bounce can all generate sound, and sound, which enters, makes internal resonance plate generate vibration in auscultation head 1, to drive inductance coil
The movement of cutting magnetic induction line is done in magnetic field, generates corresponding electric signal.
It is further used as preferred embodiment, is deposited in the electric signal that heart sound transducer described in the utility model is exported
In certain high frequency spurs signal, while the electric signal that heart sound transducer is exported is weaker, and amplitude is lower, in conjunction with above-mentioned reason,
Signal amplification module described in specific embodiment of the present invention needs to be provided simultaneously with filtering and enlarging function, the signal
Amplification module includes filter unit and amplifying unit, and the filter unit is low-pass filter, the heart sound transducer output
End is connected with filter unit input terminal, and the filter unit output end is connected with amplifying unit input terminal, and the amplifying unit is defeated
Outlet is connected with integration module input terminal.
It is further used as preferred embodiment, in specific embodiment of the present invention, the filter unit includes electricity
Hold C1, capacitor C2, resistance R1, resistance R2, resistance R3, resistance R4 and transport and placing device A1, the resistance R1 and resistance R2 are connected on
Between inductance coil and transport and placing device A1 non-inverting input terminal, the resistance R3 and resistance R4 are connected on transport and placing device A1 output end and ground connection
Between end, the transport and placing device A1 anti-phase input terminates the tie point in resistance R3 and resistance R4, and the transport and placing device A1 output end is logical
Cross capacitor C1 and connect tie point in resistance R1 and resistance R2, the both ends the capacitor C2 respectively with transport and placing device A1 non-inverting input terminal with connect
Ground terminal is connected, and the transport and placing device A1 output end is connected with amplifying unit input terminal.Specifically, filter unit described in the present embodiment
It is a second order active low-pass filter, filter effect is good.
It is further used as preferred embodiment, in specific embodiment of the present invention, the amplifying unit includes type
Number amplifier chip for being MAX9812, the filter unit output end is connected with amplifier chip input terminal, the amplifier core
Piece output end is connected with integration module input terminal.The present embodiment exports filter unit using the amplifier chip of high integration
Electric signal amplify operation, greatly reduce the complexity of circuit structure.
It is further used as preferred embodiment, for the function of realizing the integration module, the utility model specific implementation
In mode, the integration module includes diode D1, resistance R5, resistance R6, capacitor C3 and transport and placing device A2, the signal amplification
Module output end is connected with diode D1 anode, and the diode D1 cathode passes through resistance R5 and transport and placing device A2 non-inverting input terminal phase
Even, the transport and placing device A2 inverting input terminal is grounded by resistance R6, the both ends the capacitor C3 respectively with transport and placing device A2 homophase input
End is connected with output end, and the transport and placing device A2 output end is connected with comparison module input terminal.Wherein the diode D1 is used to incite somebody to action
Minus part removal in the electric signal of signal amplification module output, the conduct of diode D1 herein it is similar in rectification circuit
Halfwave rectifier function.
It is further used as preferred embodiment, when practical application, needs to control the time of integration of integration module, simultaneously also
It needs to initialize integration module after the completion of each integration operation.To realize above functions, the utility model tool
In body embodiment, the square wave module includes 555 timers, resistance R7, resistance R8, capacitor C4 and two level switches,
Between the powered end and the ground end, the 555 timer electric discharge terminates at electricity for the resistance R7, resistance R8 and capacitor C4 series connection
It hindering between R7 and resistance R8, the 555 Timer Threshold input terminal and triggering input terminal connect between resistance R8 and capacitor C4,
555 timer output end is connected with two level switch control terminals respectively, a level switch control integration module and electricity
The energization of source connects, another level switch controls the short circuit connection of capacitor C3 in integration module.Specifically, when square wave module
When exporting high level, a level switch output end closure realizes that the energization of integration module and power end connects, another level
The short circuit connection of output switching terminal breaking capacitance C3；When square wave module exports low level, a level switch output end is disconnected
Disconnect integration module with power end, another level switch output end closure realizes the short circuit connection of capacitor C3, makes electricity
The charge held on C3 is removed, and so that capacitor C3 is returned to original state, this is to make capacitor C3 when next integration period starts
Initial voltage be zero.
The better embodiment of the utility model is illustrated above, but the invention be not limited to it is described
Embodiment, those skilled in the art can also make various equivalent changes without departing from the spirit of the present invention
Type or replacement, these equivalent variation or replacement are all included in the scope defined by the claims of the present application.
Claims (7)
1. a kind of stethoscope with heart sound detection function, including stethoscope ontology, the stethoscope ontology includes auscultation head, leading note
Pipe, three-pronged connector and earpiece, the auscultation head are connected with earpiece by three-pronged connector by sound guide tube, are equipped in the auscultation head
Resonance plate, it is characterised in that: further include heart sound transducer, signal amplification module, integration module, square wave module, base modules, ratio
Compared with module and display module；The heart sound transducer output end is connected with signal amplification module input terminal, the signal amplification
Module output end is connected with integration module input terminal, and the integration module output end and base modules output end are respectively compared with
Module input is connected, and the comparison module output end is connected with display module input terminal, the square wave module and integration module
It is connected；The heart sound transducer is mounted on inside auscultation head and resonance plate mechanical oscillation signal is converted into electric signal.
2. a kind of stethoscope with heart sound detection function according to claim 1, it is characterised in that: the heart sound transducer
Permanent magnet including inductance coil and generation stationary magnetic field, the inductance coil are arranged on resonance plate, the permanent magnet peace
Inside auscultation head, the inductance coil is connected with signal amplification module input terminal.
3. a kind of stethoscope with heart sound detection function according to claim 2, it is characterised in that: the signal amplifies mould
Block includes filter unit and amplifying unit, and the filter unit is low-pass filter, the heart sound transducer output end and filter
Wave unit input terminal be connected, the filter unit output end is connected with amplifying unit input terminal, the amplifying unit output end and
Integration module input terminal is connected.
4. a kind of stethoscope with heart sound detection function according to claim 3, it is characterised in that: the filter unit packet
Include capacitor C1, capacitor C2, resistance R1, resistance R2, resistance R3, resistance R4 and transport and placing device A1, the resistance R1 and resistance R2 string
Be associated between inductance coil and transport and placing device A1 non-inverting input terminal, the resistance R3 and resistance R4 be connected on transport and placing device A1 output end with
Between ground terminal, tie point of the transport and placing device A1 anti-phase input termination in resistance R3 and resistance R4, the transport and placing device A1 output
End connects the tie point in resistance R1 and resistance R2 by capacitor C1, the both ends the capacitor C2 respectively with transport and placing device A1 non-inverting input terminal
It is connected with ground terminal, the transport and placing device A1 output end is connected with amplifying unit input terminal.
5. a kind of stethoscope with heart sound detection function according to claim 4, it is characterised in that: the amplifying unit packet
The amplifier chip of model MAX9812 is included, the filter unit output end is connected with amplifier chip input terminal, the amplification
Device chip output is connected with integration module input terminal.
6. a kind of stethoscope with heart sound detection function according to claim 1, it is characterised in that: the integration module packet
Include diode D1, resistance R5, resistance R6, capacitor C3 and transport and placing device A2, the signal amplification module output end and diode D1
Anode is connected, and the diode D1 cathode is connected by resistance R5 with transport and placing device A2 non-inverting input terminal, the transport and placing device A2 reverse phase
Input terminal is grounded by resistance R6, and the both ends the capacitor C3 are connected with transport and placing device A2 non-inverting input terminal with output end respectively, described
Transport and placing device A2 output end is connected with comparison module input terminal.
7. a kind of stethoscope with heart sound detection function according to claim 6, it is characterised in that: the square wave module packet
Include 555 timers, resistance R7, resistance R8, capacitor C4 and two level switches, the resistance R7, resistance R8 and capacitor C4
Between the powered end and the ground end, the 555 timer electric discharge terminates between resistance R7 and resistance R8, and described 555 is fixed for series connection
When device threshold value input and triggering input terminal connect between resistance R8 and capacitor C4,555 timer output end respectively with
Two level switch control terminals are connected, and the energization of a level switch control integration module and power end connects, another level
The short circuit connection of capacitor C3 in switch control integration module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721448120.3U CN208659396U (en) | 2017-11-01 | 2017-11-01 | A kind of stethoscope with heart sound detection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721448120.3U CN208659396U (en) | 2017-11-01 | 2017-11-01 | A kind of stethoscope with heart sound detection function |
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| Publication Number | Publication Date |
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| CN208659396U true CN208659396U (en) | 2019-03-29 |
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| CN201721448120.3U Expired - Fee Related CN208659396U (en) | 2017-11-01 | 2017-11-01 | A kind of stethoscope with heart sound detection function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107837092A (en) * | 2017-11-01 | 2018-03-27 | 佛山科学技术学院 | A kind of stethoscope with heart sound detection function |
-
2017
- 2017-11-01 CN CN201721448120.3U patent/CN208659396U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107837092A (en) * | 2017-11-01 | 2018-03-27 | 佛山科学技术学院 | A kind of stethoscope with heart sound detection function |
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| CF01 | Termination of patent right due to non-payment of annual fee |