CN106725373A - A kind of detection circuit for heart sound pulse detection - Google Patents
A kind of detection circuit for heart sound pulse detection Download PDFInfo
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- CN106725373A CN106725373A CN201710082218.XA CN201710082218A CN106725373A CN 106725373 A CN106725373 A CN 106725373A CN 201710082218 A CN201710082218 A CN 201710082218A CN 106725373 A CN106725373 A CN 106725373A
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- integrated circuit
- operational amplifier
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
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- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Cardiology (AREA)
- Physics & Mathematics (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
Abstract
The present invention relates to a kind of detection circuit for heart sound pulse detection, including pre-amplification circuit and spacing output circuit, pre-amplification circuit includes the first operational amplifier, second operational amplifier, first resistor, second resistance, 3rd resistor, 4th resistance, 5th resistance, first electric capacity and the second electric capacity, spacing output circuit includes the first integrated circuit, second integrated circuit, 6th resistance, 7th resistance, 8th resistance and the 9th resistance, this is used in the detection circuit of heart sound pulse detection, in pre-amplification circuit, employ double operational compensating form, there is compensating action to the temperature drift of amplifier, it is thus advantageous to the long-time stability of accentuator, the reliability of the detection of circuit is improve well；In spacing output circuit, by the buffer action of the first integrated circuit, the detection circuit of detection signal and inside can be isolated, so as to improve the reliability of spacing output circuit, be realized the reliability detection to heart sound pulse.
Description
Technical field
The present invention relates to pulse detection circuit field, more particularly to a kind of detection circuit for heart sound pulse detection.
Background technology
With the continuous quickening that Chinese Urbanization is built, various advanced "smart" products continuously emerge, along with each intelligence
Product can be changed by all trades and professions extensive use, very big help has been brought.
In existing medical instruments field, when monitor in real time is carried out to heart sound pulse, because the detection circuit holds
It is vulnerable to the interference of external temperature, so as to cause jitter, reduces the stability of detection circuit；Moreover, in inspection
When survey, often because the electrostatic with patient causes peak voltage to circuit inside, so as to easily puncture the electricity of inside
Road, causes the damage of circuit, reduces the reliability of circuit.
The content of the invention
The technical problem to be solved in the present invention is：In order to overcome the deficiencies in the prior art, there is provided one kind is used for heart sound pulse
The detection circuit of detection.
The technical solution adopted for the present invention to solve the technical problems is：A kind of detection electricity for heart sound pulse detection
Road, including pre-amplification circuit and spacing output circuit, the pre-amplification circuit are connected with spacing output circuit；
The pre-amplification circuit include the first operational amplifier, the second operational amplifier, first resistor, second resistance,
3rd resistor, the 4th resistance, the 5th resistance, the first electric capacity and the second electric capacity, the inverting input of first operational amplifier
Output end with the first operational amplifier is connected, and the output end of first operational amplifier is anti-phase with the second operational amplifier
Input is connected, and the in-phase input end of first operational amplifier is by first resistor and the series circuit of second resistance composition
Output end with the second operational amplifier is connected, and the in-phase input end of first operational amplifier passes through the 4th resistance and second
The series circuit ground connection of electric capacity composition, the in-phase input end of second operational amplifier by the 5th resistance eutral grounding, described the
One electric capacity is in parallel with the series circuit that first resistor and second resistance are constituted, one end ground connection of the 3rd resistor, the described 3rd
The other end of resistance is connected with first resistor and second resistance respectively；
The spacing output circuit includes the 3rd electric capacity, triode, the first diode, the second diode, the first integrated electricity
Road, the second integrated circuit, the 6th resistance, the 7th resistance, the 8th resistance and the 9th resistance, the model of first integrated circuit
4N30, the model NE555 of second integrated circuit, the base stage of the triode pass through the 3rd electric capacity and the second operation amplifier
The output end connection of device, the base stage of the triode is by the 6th resistance eutral grounding, the grounded emitter of the triode, described three
The colelctor electrode of pole pipe is connected with the second end of the first integrated circuit, and the first end of first integrated circuit is by outside the 9th resistance
Connect 12V DC voltage power supplies, the external 5V DC voltage power supplies in the 4th end of first integrated circuit, first integrated circuit
The 3rd end be connected with the 7th resistance, the 3rd end of first integrated circuit respectively with the second end of the second integrated circuit and
The six end connecting of two integrated circuits, the 4th end of second integrated circuit and the external 5V in the 8th end of the second integrated circuit
DC voltage power supply, the first end of second integrated circuit is connected with the negative electrode of the second diode, second diode
Anode is connected with the negative electrode of the first diode, and the anode of first diode passes through the external 5V direct currents piezoelectricity of the 8th resistance
Source.
Wherein, in pre-amplification circuit, double operational compensating form is employed, can not only reduces input offset voltage,
And the temperature drift to input offset current and amplifier has compensating action, the steady in a long-term of accentuator is thus advantageous to
Property, the reliability of the detection of circuit is improve well；And, in spacing output circuit, by the first integrated circuit every
From effect, the detection circuit (based on the second integrated circuit) of detection signal and inside can be isolated, so as to improve
The reliability of spacing output circuit, in spacing output circuit, signal is filtered by the RC that the 3rd electric capacity and the 6th resistance are constituted
Circuit is filtered after treatment, and entering into the second integrated circuit by the isolation of the first integrated circuit enters horizontal pulse output, from
And heart sound pulse signal can be converted into pulse signal, realize the accurate detection to heart sound pulse.
Specifically, the security isolation effect in order to improve circuit, the 12V DC voltage power supplies and 5V DC voltage power supplies
It is mutually isolated.
Specifically, the model of first operational amplifier and the second operational amplifier is LF411.
Specifically, the triode is NPN triode.
Specifically, the capacitance of the 3rd electric capacity is 47uF.
Specifically, the model of first diode and the second diode is 1N4147.
The beneficial effects of the invention are as follows this is used in the detection circuit of heart sound pulse detection, in pre-amplification circuit, adopts
With double operational compensating form, there is compensating action to the temperature drift of amplifier, be thus advantageous to the long-time stability of accentuator,
The reliability of the detection of circuit is improve well；And, in spacing output circuit, made by the isolation of the first integrated circuit
With, the detection circuit of detection signal and inside can be isolated, so as to improve the reliability of spacing output circuit, realize
Reliability detection to heart sound pulse.
Brief description of the drawings
The present invention is further described with reference to the accompanying drawings and examples.
Fig. 1 is the circuit theory diagrams of the detection circuit for heart sound pulse detection of the invention；
In figure：A. pre-amplification circuit, B. spacing output circuits, the operational amplifiers of U1. first, the operation amplifiers of U2. second
Device, the integrated circuits of U3. first, the integrated circuits of U4. second, R1. first resistors, R2. second resistances, R3. 3rd resistors, R4.
Four resistance, the resistance of R5. the 5th, the resistance of R6. the 6th, the resistance of R7. the 7th, the resistance of R8. the 8th, the resistance of R9. the 9th, the electricity of C1. first
Hold, the electric capacity of C2. second, the electric capacity of C3. the 3rd, VT1. triodes, the diodes of VD1. first, the diodes of VD2. second.
Specific embodiment
In conjunction with the accompanying drawings, the present invention is further explained in detail.These accompanying drawings are simplified schematic diagram, only with
Illustration illustrates basic structure of the invention, therefore it only shows the composition relevant with the present invention.
As shown in figure 1, a kind of detection circuit for heart sound pulse detection, including pre-amplification circuit A and isolation and amplifier
Circuit B, the pre-amplification circuit A are connected with spacing output circuit B；
The pre-amplification circuit A includes the first operational amplifier U1, the second operational amplifier U2, first resistor R1, the
Two resistance R2,3rd resistor R3, the 4th resistance R4, the 5th resistance R5, the first electric capacity C1 and the second electric capacity C2, first computing
The inverting input of amplifier U1 is connected with the output end of the first operational amplifier U1, the output of the first operational amplifier U1
End is connected with the inverting input of the second operational amplifier U2, and the in-phase input end of the first operational amplifier U1 passes through first
The series circuit of resistance R1 and second resistance R2 compositions is connected with the output end of the second operational amplifier U2, and first computing is put
The in-phase input end of big device U1 is grounded by the series circuit that the 4th resistance R4 and the second electric capacity C2 is constituted, and second computing is put
The in-phase input end of big device U2 is by the 5th resistance R5 ground connection, the first electric capacity C1 and first resistor R1 and second resistance R2 groups
Into series circuit it is in parallel, one end ground connection of the 3rd resistor R3, the other end of the 3rd resistor R3 respectively with the first electricity
Resistance R1 and second resistance R2 connections；
The spacing output circuit B includes the 3rd electric capacity C3, triode VT1, the first diode VD1, the second diode
VD2, the first integrated circuit U3, the second integrated circuit U4, the 6th resistance R6, the 7th resistance R7, the 8th resistance R8 and the 9th resistance
The model 4N30, the model NE555 of the second integrated circuit U4, the triode of R9, the first integrated circuit U3
The base stage of VT1 is connected by the 3rd electric capacity C3 with the output end of the second operational amplifier U2, and the base stage of the triode VT1 passes through
6th resistance R6 is grounded, the grounded emitter of the triode VT1, the colelctor electrode and the first integrated circuit of the triode VT1
The second end connection of U3, the first end of the first integrated circuit U3 is by the external 12V DC voltage power supplies of the 9th resistance R9, institute
State the external 5V DC voltage power supplies in the 4th end of the first integrated circuit U3, the 3rd end of the first integrated circuit U3 and the 7th electricity
Resistance R7 connections, the 3rd end of the first integrated circuit U3 the second end respectively with the second integrated circuit U4 and the second integrated circuit
The six end connecting of U4, the external 5V direct currents in the 8th end at the 4th end and the second integrated circuit U4 of the second integrated circuit U4
Voltage source, the first end of the second integrated circuit U4 is connected with the negative electrode of the second diode VD2, second diode
The anode of VD2 is connected with the negative electrode of the first diode VD1, and the anode of the first diode VD1 is external by the 8th resistance R8
5V DC voltage power supplies.
Wherein, in pre-amplification circuit A, double operational compensating form is employed, can not only reduces input offset voltage,
And the temperature drift to input offset current and amplifier has compensating action, the steady in a long-term of accentuator is thus advantageous to
Property, the reliability of the detection of circuit is improve well；And, in spacing output circuit B, by the first integrated circuit U3's
Buffer action, can be isolated the detection circuit (based on the second integrated circuit U4) of detection signal and inside, so as to carry
The reliability of spacing output circuit B high, in spacing output circuit B, signal is by the 3rd electric capacity C3 and the 6th resistance R6 groups
Into RC filter circuits be filtered treatment after, enter into the second integrated circuit U4 by the isolation of the first integrated circuit U3 and enter
Horizontal pulse is exported such that it is able to heart sound pulse signal is converted into pulse signal, the accurate detection to heart sound pulse is realized.
Specifically, the security isolation effect in order to improve circuit, the 12V DC voltage power supplies and 5V DC voltage power supplies
It is mutually isolated.
Specifically, the model of the first operational amplifier U1 and the second operational amplifier U2 is LF411.
Specifically, the triode VT1 is NPN triode VT1.
Specifically, the capacitance of the 3rd electric capacity C3 is 47uF.
Specifically, the model of the first diode VD1 and the second diode VD2 is 1N4147.
Compared with prior art, this is used in the detection circuit of heart sound pulse detection, in pre-amplification circuit A, uses
Double operational compensating form, has compensating action to the temperature drift of amplifier, is thus advantageous to the long-time stability of accentuator, very
The reliability of the good detection that improve circuit；And, in spacing output circuit B, by the isolation of the first integrated circuit U3
Effect, can be isolated the detection circuit (based on the second integrated circuit U4) of detection signal and inside, so as to improve
The reliability of spacing output circuit B, realizes the reliability detection to heart sound pulse.
With above-mentioned according to desirable embodiment of the invention as enlightenment, by above-mentioned description, relevant staff is complete
Various changes and amendments can be carried out without departing from the scope of the technological thought of the present invention' entirely.The technology of this invention
Property scope is not limited to the content on specification, it is necessary to its technical scope is determined according to right.
Claims (6)
1. a kind of detection circuit for heart sound pulse detection, it is characterised in that including pre-amplification circuit and isolation and amplifier electricity
Road, the pre-amplification circuit is connected with spacing output circuit；
The pre-amplification circuit includes the first operational amplifier, the second operational amplifier, first resistor, second resistance, the 3rd
Resistance, the 4th resistance, the 5th resistance, the first electric capacity and the second electric capacity, the inverting input of first operational amplifier and
The output end connection of one operational amplifier, the output end of first operational amplifier and the anti-phase input of the second operational amplifier
End connection, series circuit that the in-phase input end of first operational amplifier is made up of first resistor and second resistance and the
The output end connection of two operational amplifiers, the in-phase input end of first operational amplifier passes through the 4th resistance and the second electric capacity
The series circuit ground connection of composition, the in-phase input end of second operational amplifier is by the 5th resistance eutral grounding, first electricity
Hold, one end ground connection of the 3rd resistor, the 3rd resistor in parallel with the series circuit that first resistor and second resistance are constituted
The other end be connected with first resistor and second resistance respectively；
The spacing output circuit includes the 3rd electric capacity, triode, the first diode, the second diode, the first integrated circuit, the
Two integrated circuits, the 6th resistance, the 7th resistance, the 8th resistance and the 9th resistance, the model 4N30 of first integrated circuit,
The model NE555 of second integrated circuit, the base stage of the triode is by the 3rd electric capacity and the second operational amplifier
Output end is connected, and the base stage of the triode is by the 6th resistance eutral grounding, the grounded emitter of the triode, the triode
Colelctor electrode be connected with the second end of the first integrated circuit, the first end of first integrated circuit is external by the 9th resistance
12V DC voltage power supplies, the external 5V DC voltage power supplies in the 4th end of first integrated circuit, first integrated circuit
3rd end is connected with the 7th resistance, the 3rd end of first integrated circuit respectively with the second end of the second integrated circuit and second
The six end connecting of integrated circuit, the 4th end of second integrated circuit and the external 5V in the 8th end of the second integrated circuit are straight
Stream voltage source, the first end of second integrated circuit is connected with the negative electrode of the second diode, the sun of second diode
Pole is connected with the negative electrode of the first diode, and the anode of first diode passes through the external 5V DC voltage power supplies of the 8th resistance.
2. circuit as claimed in claim 1, it is characterised in that the 12V DC voltage power supplies and 5V DC voltage power supply phases
Mutually isolation.
3. circuit as claimed in claim 1, it is characterised in that the type of first operational amplifier and the second operational amplifier
Number it is LF411.
4. circuit as claimed in claim 1, it is characterised in that the triode is NPN triode.
5. circuit as claimed in claim 1, it is characterised in that the capacitance of the 3rd electric capacity is 47uF.
6. circuit as claimed in claim 1, it is characterised in that the model of first diode and the second diode is
1N4147。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710082218.XA CN106725373A (en) | 2017-02-15 | 2017-02-15 | A kind of detection circuit for heart sound pulse detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710082218.XA CN106725373A (en) | 2017-02-15 | 2017-02-15 | A kind of detection circuit for heart sound pulse detection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106725373A true CN106725373A (en) | 2017-05-31 |
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ID=58958830
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710082218.XA Pending CN106725373A (en) | 2017-02-15 | 2017-02-15 | A kind of detection circuit for heart sound pulse detection |
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| Country | Link |
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| CN (1) | CN106725373A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107492287A (en) * | 2017-10-16 | 2017-12-19 | 重庆师范大学 | Mute speaks instrument |
| CN108392198A (en) * | 2018-02-11 | 2018-08-14 | 许少辉 | The signal anti-jamming circuit of electrocardiograph |
-
2017
- 2017-02-15 CN CN201710082218.XA patent/CN106725373A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107492287A (en) * | 2017-10-16 | 2017-12-19 | 重庆师范大学 | Mute speaks instrument |
| CN108392198A (en) * | 2018-02-11 | 2018-08-14 | 许少辉 | The signal anti-jamming circuit of electrocardiograph |
| CN108392198B (en) * | 2018-02-11 | 2021-07-23 | 吕焕芝 | Signal anti-interference circuit of electrocardiograph |
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Application publication date: 20170531 |
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