CN106936396A - A kind of modulate circuit of Vibration Signal in Frequency Domain - Google Patents
A kind of modulate circuit of Vibration Signal in Frequency Domain Download PDFInfo
- Publication number
- CN106936396A CN106936396A CN201710281480.7A CN201710281480A CN106936396A CN 106936396 A CN106936396 A CN 106936396A CN 201710281480 A CN201710281480 A CN 201710281480A CN 106936396 A CN106936396 A CN 106936396A
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Classifications
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/38—Positive-feedback circuit arrangements without negative feedback
-
- 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
- A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
- A61B5/7203—Signal processing specially adapted for physiological signals or for diagnostic purposes for noise prevention, reduction or removal
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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
- A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
- A61B5/7225—Details of analog processing, e.g. isolation amplifier, gain or sensitivity adjustment, filtering, baseline or drift compensation
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/372—Noise reduction and elimination in amplifier
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- Public Health (AREA)
- Biophysics (AREA)
- General Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
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- Molecular Biology (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- Artificial Intelligence (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Psychiatry (AREA)
- Power Engineering (AREA)
- Cardiology (AREA)
- Amplifiers (AREA)
Abstract
The invention discloses a kind of modulate circuit of Vibration Signal in Frequency Domain, including power-supply system, sensor, pulse signal conditioning module, converter, microprocessor and serial communication circuit, sensor, pulse signal conditioning module, converter, microprocessor and serial communication circuit are sequentially connected, power-supply system is connected with sensor, pulse signal conditioning module, converter, microprocessor and serial communication circuit, for being each module for power supply of system；Pulse signal conditioning module includes pre-amplification circuit, zeroing circuit, trap circuit, bandwidth-limited circuit, voltage lifting circuit, and sensor, pre-amplification circuit, zeroing circuit, trap circuit, bandwidth-limited circuit, voltage lifting circuit, converter are sequentially connected.The present invention is processed pulse signal by signal acquiring system, is finally sent to host computer, the design to the extraction circuit of pulse signal is completed, so as to obtain pinpoint accuracy, distortionless pulse information.
Description
Technical field
The present invention relates to medical domain, and in particular to a kind of modulate circuit of Vibration Signal in Frequency Domain.
Background technology
Heart sound and pulse are two important indicators for reflecting Human Physiology and pathology, and they are respectively diagnosis human body diseases
One of important means, with very important clinical meaning.Therefore, the research background, present Research and development to the field become
Gesture has carried out abundant investigation, it is believed that existing system is usually single heart sound or single pulse collection modulate circuit, but
Due to it is aroused in interest be the source of pulsation, heart sound inherently has tight medical science with pulse and contacts, existing heart sound or single
Pulse collection modulate circuit, its distortion factor is higher, and the pulse information degree of accuracy of collection is inadequate, it is easy to cause the cause of disease to misdeem
By mistake, the diagnosis and treatment scheme that doctor makees to make mistake is misled.
The content of the invention
The technical problems to be solved by the invention are that the pulse distortion factor for gathering in the prior art is higher, and pulse information is accurate
Degree is inadequate, it is therefore intended that provide a kind of modulate circuit of Vibration Signal in Frequency Domain, obtains pinpoint accuracy, distortionless pulse information.
The present invention is achieved through the following technical solutions：
A kind of modulate circuit of Vibration Signal in Frequency Domain, including power-supply system, sensor, pulse signal conditioning module, AD turn
Parallel operation, microprocessor and serial communication circuit, the sensor, pulse signal conditioning module, converter, microprocessor and string
Port communications circuit is sequentially connected, the power-supply system and sensor, pulse signal conditioning module, converter, microprocessor and
Serial communication circuit is connected, for being each module for power supply of system；The pulse signal conditioning module includes pre-amplification circuit, adjusts
Zero circuit, trap circuit, bandwidth-limited circuit, voltage lifting circuit, the sensor, pre-amplification circuit, zeroing circuit, fall into
Wave circuit, bandwidth-limited circuit, voltage lifting circuit, converter are sequentially connected；The pre-amplification circuit is used for will sensing
The incoming signal of device carries out Linear Amplifer and eliminates interference signal, and the zeroing circuit is used to eliminate the drift that outer signals are caused
Influence is moved, the trap circuit is used to eliminate Hz noise, and the bandwidth-limited circuit is used for circuit filtering, the voltage increase
Circuit is adder circuit, and the adder circuit is used to avoid occurring without negative peak distortion during AD conversion.Conventional pulse signal
Primary bands scope is 0.05~40Hz, to prevent the pulse signal gathered in disturbance state environment to be mixed into various noises, because
This uses band connection frequency to be filtered for the bandwidth-limited circuit of 0.05~44Hz, by the active ingredient of pulse signal from collecting
Signal in extract.
Further, pre-amplification circuit includes amplifier U1, resistance R1, and the collection signal of the sensor is by amplifying
Positive input and the reverse input end input of device U1, resistance R1 be connected on the grounding pin of amplifier U1 and gain pin it
Between, the output end of the amplifier U1 is connected for signal output part and with zeroing circuit.Amplitude for pulse signal is small, frequency
Low the characteristics of, appropriate gain, input impedance high, high cmrr, low noise, linear working range drift wide and low should be used
The amplifier instrument amplifier of parallel differential three of shifting.
Further, zeroing circuit includes potentiometer RP1, amplifier U1A, resistance R2, resistance R3, resistance R4, resistance R5,
Described resistance R2 one end is connected with the signal output part of pre-amplification circuit, the reverse input end of its other end and amplifier U1A
Connection；The fixed positive 3.3V of termination of of the potentiometer RP1, another fixes the negative 3.3V of termination；One end of resistance R3 and electricity
The adjustable side connection of position device RP1, its other end be connected with resistance R5, the other end ground connection of resistance R5 and resistance R3 connection ends；Put
The positive input of big device U1A is connected on the circuit that resistance R3 is connected with resistance R5；Resistance R4 one end be connected to resistance R2 with
On the circuit of amplifier U1A connections, its other end is connected with the output end of amplifier U1A, and the output end of amplifier U1A is zeroing
The signal output part of circuit and it is connected with the signal input part of trap circuit.
The present invention compared with prior art, has the following advantages and advantages：The present invention passes through signal acquiring system
Pulse signal is processed, host computer is finally sent to, the design to the extraction circuit of pulse signal is completed, so as to obtain high-precision
Exactness, distortionless pulse information.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding the embodiment of the present invention, constitutes of the application
Point, do not constitute the restriction to the embodiment of the present invention.In the accompanying drawings：
Fig. 1 is present system structural representation；
Fig. 2 is pulse signal conditioning module structural representation of the present invention；
Fig. 3 is pre-amplification circuit structural representation of the present invention；
Fig. 4 is zeroing circuit structural representation of the present invention；
Fig. 5 is trap circuit structural representation of the present invention；
Fig. 6 is low-pass filter circuit structural representation of the present invention；
Fig. 7 is high-pass filtering circuit structural representation of the present invention；
Fig. 8 is voltage lifting circuit structural representation of the present invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention become more apparent, with reference to embodiment and accompanying drawing, to this
Invention is described in further detail, and exemplary embodiment of the invention and its explanation are only used for explaining the present invention, do not make
It is limitation of the invention.
Embodiment
As depicted in figs. 1 and 2, a kind of modulate circuit of Vibration Signal in Frequency Domain, including power-supply system, sensor, pulse letter
Number conditioning module, converter, microprocessor and serial communication circuit, the sensor, pulse signal conditioning module, AD conversion
Device, microprocessor and serial communication circuit are sequentially connected, and the power-supply system turns with sensor, pulse signal conditioning module, AD
Parallel operation, microprocessor and serial communication circuit connection, for being each module for power supply of system；The pulse signal conditioning module includes
Pre-amplification circuit, zeroing circuit, trap circuit, bandwidth-limited circuit, voltage lifting circuit, the sensor, preposition amplification
Circuit, zeroing circuit, trap circuit, bandwidth-limited circuit, voltage lifting circuit, converter are sequentially connected；Put before described
Big circuit is used to for the incoming signal of sensor to carry out Linear Amplifer and eliminates interference signal, and the zeroing circuit is used to eliminate
The drift effect that outer signals are caused, the trap circuit is used to eliminate Hz noise, and the bandwidth-limited circuit is used for circuit
Filtering, the voltage lifting circuit is adder circuit, and the adder circuit is used to avoid occurring without negative peak mistake during AD conversion
Very.
As shown in figure 3, pre-amplification circuit includes amplifier U1, resistance R1, the collection signal of the sensor is by putting
The positive input of big device U1 and reverse input end input, resistance R1 be connected on amplifier U1 grounding pin and gain pin it
Between, the output end of the amplifier U1 is connected for signal output part and with zeroing circuit.Amplifier U1 uses AD620, pulse letter
Number and noise simultaneously by this stage circuit amplify, amplify pulse signal while noise be also exaggerated, noise amplitude is excessive,
It is very unfavorable for late-class circuit treatment so that rear class signal processing circuit is difficult to effectively eliminate noise jamming.So, preceding storing
Big circuit multiplication factor should not be too big, and this stage gain is set to 2, according to the nominal value of resistance, the pin 1 and pin of amplifier U1
A 8 indirect precision is the metalfilmresistor R1 that 0.01%, resistance is 49.9K Ω.
As shown in figure 4, zeroing circuit includes potentiometer RP1, amplifier U1A, resistance R2, resistance R3, resistance R4, resistance
R5, described resistance R2 one end is connected with the signal output part of pre-amplification circuit, the reverse input of its other end and amplifier U1A
End connection；The fixed positive 3.3V of termination of of the potentiometer RP1, another fixes the negative 3.3V of termination；One end of resistance R3 with
The adjustable side connection of potentiometer RP1, its other end is connected with resistance R5, and resistance R5 is grounded with the other end of resistance R3 connection ends；
The positive input of amplifier U1A is connected on the circuit that resistance R3 is connected with resistance R5；Resistance R4 one end is connected to resistance R2
On the circuit being connected with amplifier U1A, its other end is connected with the output end of amplifier U1A, and the output end of amplifier U1A is tune
The signal output part of zero circuit and it is connected with the signal input part of trap circuit.Amplifier U1A uses TL084, resistance R3 and electricity
The resistance for hindering R5 is respectively 100K Ω and 500 Ω, constitutes 200:1 bleeder circuit, resistance R5 two ends will obtain positive and negative 16.5mV
Offset voltage adjusting range, disclosure satisfy that the requirement of zeroing circuit, the resistance of resistance R5 is as small as possible.
As shown in figure 5, to eliminate Hz noise to greatest extent, using the power frequency notch filter of 50Hz, the trap circuit is adopted
With the double-t circuit with positive feedback, because double-t circuit haves the shortcomings that quality factor are fixed 1/4, it is therefore desirable to introduce
Positive feedback overcomes.As shown in Figure 6 and Figure 7, bandwidth-limited circuit employs low pass filter and high-pass filter, conventional pulse letter
Number primary bands scope be 0.05~40Hz, for prevent in interference environment gather pulse signal in be mixed into various noises,
Band connection frequency is used to be filtered for the bandpass filter of 0.05~44Hz, high-pass filter is 0.05Hz, low pass filter is
44Hz.As shown in figure 8, being voltage lifting circuit, by circuit above, a pure pulse signal of comparing is obtained,
But there is minus part in pulse signal, and the minimum transfer limit of converter MAX1240 definition is 0V, in order to ensure
Negative peak distortion is occurred without during AD conversion, it is necessary to which filtered electrocardiosignal is passed through into a voltage lifting circuit so that electrocardio is believed
Number level value be all on the occasion of.
Above-described specific 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 and the foregoing is only specific embodiment of the invention, be not intended to limit the present invention
Protection domain, all any modification, equivalent substitution and improvements within the spirit and principles in the present invention, done etc. all should include
Within protection scope of the present invention.
Claims (3)
1. a kind of modulate circuit of Vibration Signal in Frequency Domain, it is characterised in that including power-supply system, sensor, pulse signal conditioning
Module, converter, microprocessor and serial communication circuit, it is the sensor, pulse signal conditioning module, converter, micro-
Processor and serial communication circuit are sequentially connected, the power-supply system and sensor, pulse signal conditioning module, converter,
Microprocessor and serial communication circuit are connected, for being each module for power supply of system；The pulse signal conditioning module includes preposition
Amplifying circuit, zeroing circuit, trap circuit, bandwidth-limited circuit, voltage lifting circuit, the sensor, pre-amplification circuit,
Zeroing circuit, trap circuit, bandwidth-limited circuit, voltage lifting circuit, converter are sequentially connected；The pre-amplification circuit
For the incoming signal of sensor to be carried out into Linear Amplifer and interference signal is eliminated, the zeroing circuit is used to eliminate extraneous letter
Number drift effect for causing, the trap circuit is used to eliminate Hz noise, and the bandwidth-limited circuit is used for circuit filtering, institute
Voltage lifting circuit is stated for adder circuit, the adder circuit is used to avoid occurring without negative peak distortion during AD conversion.
2. the modulate circuit of a kind of Vibration Signal in Frequency Domain according to claim 1, it is characterised in that described preposition to amplify electricity
Road includes amplifier U1, resistance R1, and the collection signal of the sensor passes through the positive input of amplifier U1 and reversely input
End input, resistance R1 is connected between the grounding pin of amplifier U1 and gain pin, and the output end of the amplifier U1 is letter
Number output end and it is connected with zeroing circuit.
3. a kind of modulate circuit of Vibration Signal in Frequency Domain according to claim 1, it is characterised in that the zeroing circuit bag
Potentiometer RP1, amplifier U1A, resistance R2, resistance R3, resistance R4, resistance R5 are included, electricity is amplified in described resistance R2 one end with preposition
The signal output part connection on road, its other end is connected with the reverse input end of amplifier U1A；One of the potentiometer RP1 is solid
Fixed end meets positive 3.3V, and another fixes the negative 3.3V of termination；One end of resistance R3 is connected with the adjustable side of potentiometer RP1, and its is another
End is connected with resistance R5, and resistance R5 is grounded with the other end of resistance R3 connection ends；The positive input of amplifier U1A is connected to electricity
On the circuit that resistance R3 is connected with resistance R5；Resistance R4 one end is connected on the circuit that resistance R2 is connected with amplifier U1A, and its is another
End is connected with the output end of amplifier U1A, and the output end of amplifier U1A is the signal output part and and trap circuit of zeroing circuit
Signal input part connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710281480.7A CN106936396A (en) | 2017-04-26 | 2017-04-26 | A kind of modulate circuit of Vibration Signal in Frequency Domain |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710281480.7A CN106936396A (en) | 2017-04-26 | 2017-04-26 | A kind of modulate circuit of Vibration Signal in Frequency Domain |
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| Publication Number | Publication Date |
|---|---|
| CN106936396A true CN106936396A (en) | 2017-07-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710281480.7A Withdrawn CN106936396A (en) | 2017-04-26 | 2017-04-26 | A kind of modulate circuit of Vibration Signal in Frequency Domain |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107928641A (en) * | 2017-12-12 | 2018-04-20 | 吉林大学 | Pulse signal extraction element for pulse wave spectrum |
| CN107928638A (en) * | 2017-12-12 | 2018-04-20 | 吉林大学 | A kind of pulse signal extraction and transmission circuit |
| CN107928636A (en) * | 2017-12-12 | 2018-04-20 | 吉林大学 | A kind of pulse-taking instrument with temperature compensation function |
| CN109387279A (en) * | 2018-12-19 | 2019-02-26 | 南京工程学院 | A kind of detection circuit of the vibration signal of pair of turbine generator final stage |
| CN109743043A (en) * | 2019-01-04 | 2019-05-10 | 北京环境特性研究所 | A kind of pulse signal zeroing circuit |
| CN109917180A (en) * | 2019-04-03 | 2019-06-21 | 杭州安脉盛智能技术有限公司 | Direct current signal non-contact detecting sensor based on current transformer |
| CN112117975A (en) * | 2019-06-21 | 2020-12-22 | 北京自动化控制设备研究所 | Self-zeroing device of preamplifier |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1287867A (en) * | 2000-08-11 | 2001-03-21 | 贵州省人民医院 | Heart physiological pace-maker/program control stimulation instrument having electrocardio mornitoring function |
| CN104083159A (en) * | 2014-07-25 | 2014-10-08 | 西北民族大学 | Pulse signal collecting system based on FPGA |
| CN105664432A (en) * | 2015-12-31 | 2016-06-15 | 上海摩软通讯技术有限公司 | Resistance adjusting method and wearable device |
| CN106551695A (en) * | 2015-09-24 | 2017-04-05 | 李福霞 | A kind of electrocardiosignal modulate circuit |
-
2017
- 2017-04-26 CN CN201710281480.7A patent/CN106936396A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1287867A (en) * | 2000-08-11 | 2001-03-21 | 贵州省人民医院 | Heart physiological pace-maker/program control stimulation instrument having electrocardio mornitoring function |
| CN104083159A (en) * | 2014-07-25 | 2014-10-08 | 西北民族大学 | Pulse signal collecting system based on FPGA |
| CN106551695A (en) * | 2015-09-24 | 2017-04-05 | 李福霞 | A kind of electrocardiosignal modulate circuit |
| CN105664432A (en) * | 2015-12-31 | 2016-06-15 | 上海摩软通讯技术有限公司 | Resistance adjusting method and wearable device |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107928641A (en) * | 2017-12-12 | 2018-04-20 | 吉林大学 | Pulse signal extraction element for pulse wave spectrum |
| CN107928638A (en) * | 2017-12-12 | 2018-04-20 | 吉林大学 | A kind of pulse signal extraction and transmission circuit |
| CN107928636A (en) * | 2017-12-12 | 2018-04-20 | 吉林大学 | A kind of pulse-taking instrument with temperature compensation function |
| CN109387279A (en) * | 2018-12-19 | 2019-02-26 | 南京工程学院 | A kind of detection circuit of the vibration signal of pair of turbine generator final stage |
| CN109743043A (en) * | 2019-01-04 | 2019-05-10 | 北京环境特性研究所 | A kind of pulse signal zeroing circuit |
| CN109743043B (en) * | 2019-01-04 | 2023-01-20 | 北京环境特性研究所 | Pulse signal zero setting circuit |
| CN109917180A (en) * | 2019-04-03 | 2019-06-21 | 杭州安脉盛智能技术有限公司 | Direct current signal non-contact detecting sensor based on current transformer |
| CN109917180B (en) * | 2019-04-03 | 2021-01-15 | 杭州安脉盛智能技术有限公司 | Direct current signal non-contact detection sensor based on current transformer |
| CN112117975A (en) * | 2019-06-21 | 2020-12-22 | 北京自动化控制设备研究所 | Self-zeroing device of preamplifier |
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Application publication date: 20170707 |
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