CN107115104A - Gather the instrument quality assessment system of micro-vibration signal - Google Patents
Gather the instrument quality assessment system of micro-vibration signal Download PDFInfo
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- CN107115104A CN107115104A CN201710235237.1A CN201710235237A CN107115104A CN 107115104 A CN107115104 A CN 107115104A CN 201710235237 A CN201710235237 A CN 201710235237A CN 107115104 A CN107115104 A CN 107115104A
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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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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/48—Other medical applications
- A61B5/4854—Diagnosis based on concepts of traditional oriental medicine
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- Alternative & Traditional Medicine (AREA)
- Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
Abstract
The invention discloses the instrument quality assessment system of collection micro-vibration signal, including pulsatile motion signal acquisition module, pre-amplification circuit, filter circuit, rear class amplifying circuit, host computer, pulsatile motion signal acquisition module, pre-amplification circuit, filter circuit, rear class amplifying circuit, host computer are sequentially connected；Pulsatile motion signal acquisition module includes resistance R5, amplifier U1, amplifier U2, diode D1, light emitting diode D2, photodiode D3, electric capacity C1, electric capacity C2.The present invention is acquired by pulsatile motion signal acquisition module to pulse information, the ultra-weak electronic signal collected is amplified by pre-amplification circuit, filter circuit, rear class amplifying circuit to wherein effective pulse signal, decay other interference informations simultaneously, transmitted after processing to host computer and carry out pathological analysis, accurate pulse signal is gathered in the situation for avoiding damage to human body, the degree of accuracy of pulse signal is improved, contributes to the diagnosis state of an illness.
Description
Technical field
The present invention relates to vibration detection, and in particular to the instrument quality assessment system of collection micro-vibration signal.
Background technology
Pulse is common physiological phenomenon, is the external reflection of the important physiologic information such as heart and blood vessel state；Therefore, arteries and veins
Detection of fighting is not only that blood pressure measurement, blood flow measurement and other physiological detections provide physiological reference information, and pulse wave is in itself
Also many, which can be provided, the information of diagnostic value.Chinese medicine pulse diagnostic techniques is exactly Zhuo of the pulses measure technology on tcm diagnosis
Fruitful application.Diagnosis by feeling the pulse is that doctor cuts by patient artery pulse to detect pulse condition, understand examining for the state of an illness with the tactile of finger
Disconnected method, by the change that will be seen that qi and blood of feeling the pulse, the prosperity and decline of negative and positive, to analyzing pathology, the change for inferring disease, identification disease
The prognosis that is true and false, judging disease of feelings, all with important clinical meaning.Many factors are waited to be done yet with by artificial
Disturb so that traditional TCM pulse diagnosis lacks objectivity, and doctor is often " easy in the heart, to refer to lower hardly possible bright ".Using in the prior art
Traditional pulse detection method, can produce wound, and information transfer uses wire transmission to human body, in-convenience in use, be not easy to by
People receive.
The content of the invention
The technical problems to be solved by the invention are that pulse detection can produce wound to human body, it is therefore intended that provide collection micro-
The instrument quality assessment system of vibration signal, reduces human body wound, improves the anti-interference during pulse collection, is that doctor examines
It is disconnected that more real pulse is provided.
The present invention is achieved through the following technical solutions：
Gather the instrument quality assessment system of micro-vibration signal, including pulsatile motion signal acquisition module, preposition amplification electricity
Road, filter circuit, rear class amplifying circuit, host computer, the pulsatile motion signal acquisition module, pre-amplification circuit, filtered electrical
Road, rear class amplifying circuit, host computer are sequentially connected；The pulsatile motion signal acquisition module includes resistance R1, resistance R2, resistance
R3, resistance R4, resistance R5, amplifier U1, amplifier U2, diode D1, light emitting diode D2, photodiode D3, electric capacity C1,
Electric capacity C2, resistance R1 mono- termination power, its other end are connected with amplifier U1 positive input；Resistance R2 one end is connected to electricity
On the circuit that resistance R1 is connected with amplifier U1, its other end ground connection；Electric capacity C1 one end is connected with amplifier U1 reverse input end,
Its other end is grounded；Amplifier U1 reverse input end is connected with amplifier U1 output end；Resistance R4 one end and amplifier U1
Output end connection, its other end is connected with amplifier U2 positive input；The termination powers of resistance R5 mono-, its other end and two
Pole pipe D1 anode connection；Diode D1 negative electrode input is connected with light emitting diode D2 anode, light emitting diode D2's
Negative electrode is connected with photodiode D3 negative electrode, and photodiode D3 anode is connected with amplifier U2 reverse input end；Electricity
Resistance R3 one end is connected on the circuit that photodiode D3 is connected with amplifier U2, and the output end of its other end and amplifier U2 connects
Connect；Electric capacity C2 is connected in parallel on resistance R3 two ends, and amplifier U2 output end is connected with pre-amplification circuit.Pulsatile motion signal acquisition
Module contact human body gathers pulse information, the characteristics of having weak output signal due to pulse information, disturb more, therefore will collect
Pulse signal be filtered, amplify etc. by pre-amplification circuit, filter circuit, rear class amplifying circuit and handle, after processing
Information transfer to host computer carry out follow-up pathological analysis.
Further, pre-amplification circuit includes electric capacity C3, electric capacity C4, electric capacity C5, resistance R6, resistance R7, resistance R8, electricity
Hinder R9, resistance R10, resistance R11, amplifier U3, electric capacity C3 one end is connected with pulsatile motion signal acquisition module, its other end and
Resistance R8 connections；Resistance R8 is connected with the other end of electric capacity C3 connection ends with amplifier U3 sign-changing amplifier U3；Electric capacity C5 mono-
End ground connection, its other end is connected with resistance R9, and electric capacity C4 and resistance R6 are connected in parallel on electric capacity C51 two ends；Resistance R7 one end is connected
On the circuit that resistance R6 is connected with resistance R9, its another termination power；The other end at resistance R9 connection electric capacity C5 ends and amplification
Device U3 positive input connection；Resistance R11 one end is connected to amplifier U3 positive power source terminal, and end points ground connection, resistance R11 is another
One end is connected with amplifier U3 output end；Resistance R10 one end is connected on the circuit that resistance R8 is connected with amplifier U3, and its is another
One end is connected with amplifier U3 output end；Electric capacity C6 is connected in parallel on resistance R10 two ends.Pre-amplification circuit is believed effective pulse
Breath is amplified, and other interference informations are tentatively decayed.
Further, filter circuit includes resistance R12, resistance R13, resistance R14, resistance R15, electric capacity C7, electric capacity C8, electricity
Hold C9, amplifier U4, resistance R12 one end is connected with pre-amplification circuit, and its other end is connected with resistance R13；Resistance R13 and electricity
The other end of resistance R12 connection ends is connected with resistance R14, the other end at resistance R14 connection resistance R13 ends and amplifier U4 forward direction
Input is connected；Electric capacity C7 one end is connected on the circuit that resistance R12 is connected with resistance R13, its other end ground connection；Electric capacity C8 mono-
End is connected on the circuit that resistance R14 is connected with amplifier U4, its other end ground connection；Electric capacity C9 one end be connected to resistance R13 with
On the circuit of resistance R14 connections, its other end is connected with amplifier U4 output end；Resistance R15 one end and amplifier U4 are just
Power end is connected, and its other end is connected with amplifier U4 output end；Amplifier U4 reverse input end be connected to electric capacity C9 with
On the circuit of amplifier U4 output end connection.Filter circuit is further decayed to other interference informations.
The present invention compared with prior art, has the following advantages and advantages：The present invention passes through pulsatile motion signal
Acquisition module is acquired to pulse information, and the ultra-weak electronic signal collected is passed through into pre-amplification circuit, filter circuit, rear class
Amplifying circuit is amplified to wherein effective pulse signal, while other interference informations that decay, are transmitted after processing to upper
Machine carries out pathological analysis, gathers accurate pulse signal in the situation for avoiding damage to human body, improves the degree of accuracy of pulse signal,
Contribute to the diagnosis state of an illness.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding the embodiment of the present invention, constitutes one of the application
Point, do not constitute the restriction to the embodiment of the present invention.In the accompanying drawings：
Fig. 1 is pulsatile motion signal acquisition module circuit diagram of the present invention；
Fig. 2 is pre-amplification circuit schematic diagram of the present invention；
Fig. 3 is filter circuit schematic diagram of the present invention；
Fig. 4 is rear class amplifying circuit schematic diagram of the present invention.
Embodiment
For the object, technical solutions and advantages of the present invention are more clearly understood, with reference to embodiment and accompanying drawing, to this
Invention is described in further detail, and exemplary embodiment and its explanation of the invention is only used for explaining the present invention, does not make
For limitation of the invention.
Embodiment
As shown in figure 1, the instrument quality assessment system of collection micro-vibration signal, including pulsatile motion signal acquisition module,
Pre-amplification circuit, filter circuit, rear class amplifying circuit, host computer, the pulsatile motion signal acquisition module, preposition amplification electricity
Road, filter circuit, rear class amplifying circuit, host computer are sequentially connected；The pulsatile motion signal acquisition module includes resistance R1, electricity
Hinder R2, resistance R3, resistance R4, resistance R5, amplifier U1, amplifier U2, diode D1, light emitting diode D2, photodiode
D3, electric capacity C1, electric capacity C2, the termination powers of resistance R1 mono-, its other end are connected with amplifier U1 positive input；Resistance R2 mono-
End is connected on the circuit that resistance R1 is connected with amplifier U1, its other end ground connection；Electric capacity C1 one end is reverse with amplifier U1's
Input is connected, its other end ground connection；Amplifier U1 reverse input end is connected with amplifier U1 output end；Resistance R4 one end
It is connected with amplifier U1 output end, its other end is connected with amplifier U2 positive input；The termination powers of resistance R5 mono-, its
The other end is connected with diode D1 anode；Diode D1 negative electrode input is connected with light emitting diode D2 anode, is lighted
Diode D2 negative electrode is connected with photodiode D3 negative electrode, photodiode D3 anode and amplifier U2 reverse input
End connection；Resistance R3 one end is connected on the circuit that photodiode D3 is connected with amplifier U2, its other end and amplifier U2
Output end connection；Electric capacity C2 is connected in parallel on resistance R3 two ends, and amplifier U2 output end is connected with pre-amplification circuit.Photosensitive two
Pole pipe D3 uses BPW83 type infrared receiving diodes, and light emitting diode D2 uses IR333 type infrared-emitting diodes, their works
It is all 940nm to make wavelength, in folder is referred to, and infrared receiving diode and infrared-emitting diode are put to obtain optimal finger relatively
To characteristic.Electric current in infrared-emitting diode is bigger, and launch angle is smaller, and the emissive porwer of generation is bigger.
Amplifier U1 uses LM393, amplifier U1 to be connected in unity gain buffer to produce 2.5V reference voltage.Due to
Infrared receiving diode can produce electric energy under the irradiation of infrared light, and single diode can produce O.4V voltage, 0.5mA electric currents.
Infrared receiving diode (BPW83 types) and infrared-emitting diode (IR333 types), their operation wavelength is all 940nm, is being referred to
In folder, infrared receiving diode and infrared-emitting diode are put to obtain optimal directional property relatively.The pole of infrared emission two
Electric current in pipe is bigger, and launch angle is smaller, and the emissive porwer of generation is bigger.R5 selects 100 Ω to be to be based on the pole of infrared receiver two
Pipe senses what infrared luminous sensitivity considered.R5 is excessive, less than normal by the electric current of infrared-emitting diode, BPW83 type infrared receivers
Diode cannot be distinguished from signal when pulse and pulseless.Conversely, R5 is too small, the electric current passed through is bigger than normal, the pole of infrared receiver two
Pipe can not distinguish signal when having pulse and pulseless exactly.When the infrared light direct irradiation of infrared emission diode emitter
When on to infrared receiving diode, amplifier U2 anti-phase input terminal potential is more than homophase input terminal potential.Surveyed when finger is in
When measuring position, it may appear that two kinds of situations：One is the acrotism phase.Although finger has blocked the infrared light of infrared-emitting diode transmitting,
But, due to there is dark current in infrared receiving diode, the dark current for still having l μ A can cause positive input current potential to be slightly below
2.5V.Two be to have the arteries and veins phase.When there is the pulse of bounce, blood vessels make finger translucency be deteriorated, the dark electricity in infrared receiving diode
Stream reduces, and positive input current potential rises.Because infrared ray is black light, it can not intuitively know that he is when connecting with the mains
No conducting, thus behind the R5 on section an indicator lamp come differentiate he whether normal work.Therefore the collection of pulse signal is actual
On be the faint change of dark current when having arteries and veins and acrotism by infrared receiving diode, then by amplifier U2 amplification and
Obtain.The signal collected is 2 μ V or so voltage signal.
As shown in Fig. 2 pre-amplification circuit include electric capacity C3, electric capacity C4, electric capacity C5, resistance R6, resistance R7, resistance R8,
Resistance R9, resistance R10, resistance R11, amplifier U3, electric capacity C3 one end are connected with pulsatile motion signal acquisition module, its other end
It is connected with resistance R8；Resistance R8 is connected with the other end of electric capacity C3 connection ends with amplifier U3 sign-changing amplifier U3；Electric capacity C5
One end is grounded, and its other end is connected with resistance R9, and electric capacity C4 and resistance R6 are connected in parallel on electric capacity C51 two ends；Resistance R7 one end connects
It is connected on the circuit that resistance R6 is connected with resistance R9, its another termination power；The other end at resistance R9 connection electric capacity C5 ends is with putting
Big device U3 positive input connection；Resistance R11 one end is connected to amplifier U3 positive power source terminal, end points ground connection, resistance R11
The other end is connected with amplifier U3 output end；Resistance R10 one end is connected on the circuit that resistance R8 is connected with amplifier U3, its
The other end is connected with amplifier U3 output end；Electric capacity C6 is connected in parallel on resistance R10 two ends.
Pre-amplification circuit is made up of blocking low pass inverting amplifier, removes direct current low frequency signal, suppresses high-frequency signal, right
50Hz Hz noises are tentatively decayed, while carrying out preliminary amplification to effective pulse signal, its multiplication factor set is
10 times, cut-off frequency scope is 0.05~20Hz, according to A=R10/R11, chooses R10=100K, R11=1M.It is simultaneously elimination
Bias voltage, accesses resistance R9 between positive input and ground, and size is chosen for 100K.Low-pass cut-off frequencies are set to 20Hz, because R10
=1M, so it is 6800PF, cut-off frequency substantially 23Hz to choose C6.
As shown in figure 3, filter circuit include resistance R12, resistance R13, resistance R14, resistance R15, electric capacity C7, electric capacity C8,
Electric capacity C9, amplifier U4, resistance R12 one end are connected with pre-amplification circuit, and its other end is connected with resistance R13；Resistance R13 with
The other end of resistance R12 connection ends is connected with resistance R14, and the other end and amplifier U4 at resistance R14 connection resistance R13 ends are just
Connected to input；Electric capacity C7 one end is connected on the circuit that resistance R12 is connected with resistance R13, its other end ground connection；Electric capacity C8
One end is connected on the circuit that resistance R14 is connected with amplifier U4, its other end ground connection；Electric capacity C9 one end is connected to resistance R13
On the circuit being connected with resistance R14, its other end is connected with amplifier U4 output end；Resistance R15 one end is with amplifier U4's
Positive power source terminal is connected, and its other end is connected with amplifier U4 output end；Amplifier U4 reverse input end is connected to electric capacity C9
On the circuit being connected with amplifier U4 output end.
The filtering part uses three rank Butterworth LPFs, cut-off frequency f=10Hz is set, according to method of naturalization
R12=R13=R14=100K, C7=0.47uF, C9=0.33uF, C8=0.33uF are selected, the low-pass filter circuit is remained
Effective pulse low frequency signal, larger decay has been carried out to noises such as 50Hz power frequencies.
As shown in figure 4, rear class amplifying circuit use variable gain reverse amplification circuit, sign-changing amplifier due to resistance most
Big value is less than or equal to 10M ohm, if to improve the input impedance of sign-changing amplifier, the gain of circuit will be limited
System.The sign-changing amplifier that system is used can avoid this limitation, existing higher input impedance again it is desirable enough to gain.
If choose R20 be much larger than R22, R21, then the gain of amplifier can approximate calculation be：A=-R20/R16* (1+R21/R22),
If the potentiometer that it is 10K that R16=100K, R20=1M, R21, which are range, R22=1K, R19=100K constitutes LPF, cut-off
Frequency is 20Hz, is 11~110 according to formula gain ranging.
Above-described embodiment, has been carried out further to the purpose of the present invention, technical scheme and beneficial effect
Describe in detail, should be understood that the embodiment that the foregoing is only the present invention, be not intended to limit the present invention
Protection domain, within the spirit and principles of the invention, any modification, equivalent substitution and improvements done etc. all should be included
Within protection scope of the present invention.
Claims (3)
1. gather the instrument quality assessment system of micro-vibration signal, it is characterised in that including pulsatile motion signal acquisition module, preceding
Put amplifying circuit, filter circuit, rear class amplifying circuit, host computer, the pulsatile motion signal acquisition module, preposition amplification electricity
Road, filter circuit, rear class amplifying circuit, host computer are sequentially connected；The pulsatile motion signal acquisition module includes resistance R1, electricity
Hinder R2, resistance R3, resistance R4, resistance R5, amplifier U1, amplifier U2, diode D1, light emitting diode D2, photodiode
D3, electric capacity C1, electric capacity C2, the termination powers of resistance R1 mono-, its other end are connected with amplifier U1 positive input；Resistance R2 mono-
End is connected on the circuit that resistance R1 is connected with amplifier U1, its other end ground connection；Electric capacity C1 one end is reverse with amplifier U1's
Input is connected, its other end ground connection；Amplifier U1 reverse input end is connected with amplifier U1 output end；Resistance R4 one end
It is connected with amplifier U1 output end, its other end is connected with amplifier U2 positive input；The termination powers of resistance R5 mono-, its
The other end is connected with diode D1 anode；Diode D1 negative electrode input is connected with light emitting diode D2 anode, is lighted
Diode D2 negative electrode is connected with photodiode D3 negative electrode, photodiode D3 anode and amplifier U2 reverse input
End connection；Resistance R3 one end is connected on the circuit that photodiode D3 is connected with amplifier U2, its other end and amplifier U2
Output end connection；Electric capacity C2 is connected in parallel on resistance R3 two ends, and amplifier U2 output end is connected with pre-amplification circuit.
2. the instrument quality assessment system of collection micro-vibration signal according to claim 1, it is characterised in that described preposition
Amplifying circuit include electric capacity C3, electric capacity C4, electric capacity C5, resistance R6, resistance R7, resistance R8, resistance R9, resistance R10, resistance R11,
Amplifier U3, electric capacity C3 one end is connected with pulsatile motion signal acquisition module, and its other end is connected with resistance R8；Resistance R8 and electricity
The other end for holding C3 connection ends is connected with amplifier U3 sign-changing amplifier U3；Electric capacity C5 one end is grounded, its other end and resistance
R9 connections, electric capacity C4 and resistance R6 are connected in parallel on electric capacity C51 two ends；Resistance R7 one end is connected to what resistance R6 was connected with resistance R9
On circuit, its another termination power；The other end at resistance R9 connection electric capacity C5 ends is connected with amplifier U3 positive input；Electricity
Resistance R11 one end is connected to amplifier U3 positive power source terminal, end points ground connection, the output end of the resistance R11 other ends and amplifier U3
Connection；Resistance R10 one end is connected on the circuit that resistance R8 is connected with amplifier U3, the output end of its other end and amplifier U3
Connection；Electric capacity C6 is connected in parallel on resistance R10 two ends.
3. the instrument quality assessment system of collection micro-vibration signal according to claim 1, it is characterised in that the filtering
Circuit includes resistance R12, resistance R13, resistance R14, resistance R15, electric capacity C7, electric capacity C8, electric capacity C9, amplifier U4, resistance R12
One end is connected with pre-amplification circuit, and its other end is connected with resistance R13；The other end of resistance R13 and resistance R12 connection ends with
Resistance R14 connections, the other end at resistance R14 connection resistance R13 ends is connected with amplifier U4 positive input；Electric capacity C7 one end
It is connected on the circuit that resistance R12 is connected with resistance R13, its other end ground connection；Electric capacity C8 one end is connected to resistance R14 and amplification
On the circuit of device U4 connections, its other end ground connection；Electric capacity C9 one end is connected on the circuit that resistance R13 is connected with resistance R14, its
The other end is connected with amplifier U4 output end；Resistance R15 one end is connected with amplifier U4 positive power source terminal, and its other end is with putting
Big device U4 output end connection；Amplifier U4 reverse input end is connected to the line that electric capacity C9 is connected with amplifier U4 output end
Lu Shang.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710235237.1A CN107115104A (en) | 2017-04-12 | 2017-04-12 | Gather the instrument quality assessment system of micro-vibration signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710235237.1A CN107115104A (en) | 2017-04-12 | 2017-04-12 | Gather the instrument quality assessment system of micro-vibration signal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107115104A true CN107115104A (en) | 2017-09-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710235237.1A Withdrawn CN107115104A (en) | 2017-04-12 | 2017-04-12 | Gather the instrument quality assessment system of micro-vibration signal |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108030475A (en) * | 2017-12-12 | 2018-05-15 | 长春工程学院 | A kind of Chinese medicine pulse detector |
| CN110251114A (en) * | 2019-07-04 | 2019-09-20 | 华东师范大学 | A kind of compressible wearable finger arteries and veins measuring device |
-
2017
- 2017-04-12 CN CN201710235237.1A patent/CN107115104A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108030475A (en) * | 2017-12-12 | 2018-05-15 | 长春工程学院 | A kind of Chinese medicine pulse detector |
| CN110251114A (en) * | 2019-07-04 | 2019-09-20 | 华东师范大学 | A kind of compressible wearable finger arteries and veins measuring device |
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Application publication date: 20170901 |