CN206044617U - A kind of circuit and blood pressure cuff measuring instrument for extracting blood pressure cuff Sasser - Google Patents
A kind of circuit and blood pressure cuff measuring instrument for extracting blood pressure cuff Sasser Download PDFInfo
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- CN206044617U CN206044617U CN201620740748.XU CN201620740748U CN206044617U CN 206044617 U CN206044617 U CN 206044617U CN 201620740748 U CN201620740748 U CN 201620740748U CN 206044617 U CN206044617 U CN 206044617U
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- sasser
- blood pressure
- pressure cuff
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Abstract
The utility model discloses a kind of circuit and blood pressure cuff measuring instrument for extracting blood pressure cuff Sasser, including：The Sasser signal for gathering cuff Sasser signal, and is changed into the signal of telecommunication by pressure sensitive unit, and the signal of telecommunication includes Sasser data and pressure data, and the Sasser data form data S through the first low pass filter1, the pressure data is through the second low pass filter, formation data S2；Amplifier unit, data S1Flow through electric capacity C3With resistance R3, it is connected to operational amplifier positive pole, data S2Flow through electric capacity C4With resistance R4, it is connected to operational amplifier negative pole, the S1And S2Data S are formed Jing after operational amplifierO, data S0Through the 3rd low pass filter, data S are formed3, the S3 flows into micro-chip processor, to realize stably, accurately extracting blood pressure cuff Sasser.
Description
Technical field
This utility model is related to a kind of blood pressure and extracts circuit and survey meter of blood pressure, more particularly to a kind of to extract blood pressure cuff shake
Swing the circuit and blood pressure cuff measuring instrument of ripple.
Background technology
Measurement blood pressure is the important way for preventing apoplexy.The method of noinvasive measuring blood pressure has auscultation（Korotkoff's Sound method）And oscillography
Method（Sasser method）, both approaches respectively have a quality, the measurement of Korotkoff's Sound method relatively accurately, but individual poor repeatability, Sasser method can
It is reproducible, but measurement has error.At present, on market, most upper Arm-cuff device is all by filling using Sasser method
Several part compositions such as gas cuff, pressure transducer, inflator pump, air bleeding valve, power supply, control circuit.
Upper Arm-cuff device realization air pump is inflated to the cuff for being wrapped in upper arm, then controls air bleeding valve row
Gas, during this, while pressure transducer records pressure data, and pressure transducer can be shaken to cuff by upper arm
Sasser is extracted and is amplified by ripple, amplified circuit, is continued until that pressure, less than human body diastolic pressure, is then emptied empty in cuff
Gas, measurement terminate.Pressure data and Sasser are calculated with algorithm again, finally draw the measurement knot of systolic pressure, diastolic pressure
By.
It is a critically important ring that amplification Sasser is extracted from pressure transducer in upper Arm-cuff device measurement process
Section.Be related to analogue signal amplify, filtering principle, and signal is easily interfered so as to affect the essence of whole measurement system
Degree, to be used operational amplifier and the output signal of pressure transducer is amplified and is filtered.It is existing to realize this functional circuit
3 to 4 group amplifiers can be all used in design, more reach 7 to 8 group amplifiers.Amplifier is sophisticated integrated circuits, and its price is higher than common electricity
Sub- components and parts, especially when scale volume production, this circuit cost is costly.
A difficult problem higher in order to solve available circuit cost, needs design one kind to simply use one group of operational amplifier
It is capable of achieving from pressure transducer to extract the circuit for amplifying Sasser.
Utility model content
The purpose of this utility model is to provide a kind of circuit for extracting blood pressure cuff Sasser, and the circuit stability is good, smart
Degree is high, low cost, and concrete technical scheme is as follows：
The circuit of blood pressure cuff Sasser is extracted, as shown in figure 1, including pressure sensitive unit 1, for gathering blood pressure cuff
Sasser signal, and the Sasser signal is changed into into the signal of telecommunication, the signal of telecommunication includes Sasser data and pressure data,
The Sasser data form data S through the first low pass filter1, the pressure data is through the second low pass filter, shape
Into data S2；
Amplifier unit 2, data S1Flow through electric capacity C3With resistance R3, it is connected to operational amplifier positive pole, data S2
Flow through electric capacity C4With resistance R4, it is connected to operational amplifier negative pole, the S1And S2Data S are formed Jing after operational amplifier0, it is described
Operational amplifier positive pole connects reference voltage REF, and the operational amplifier is connected with power supply, and the power supply connects electric capacity C5, institute
State C5Ground connection, data S0Through the 3rd low pass filter, data S are formed3, the S3Micro-chip processor is flowed into, to realize carrying
Take blood pressure cuff Sasser.
Further, first low pass filter, by resistance R1With electric capacity C1Composition, the C1Ground connection so that higher than cut-off
Frequency f1Data be intercepted, the f1=1/（2ΠR1C1）, realize the denoising of Sasser data.
Further, second low pass filter, by resistance R2With electric capacity C2Composition, the C2Ground connection so that higher than cut-off
Frequency f2Data be intercepted, the f2=1/（2ΠR2C2）, realize the denoising of pressure data.
Further, resistance R is provided between the reference voltage and operational amplifier positive pole5。
Further, resistance R is provided between the operational amplifier negative pole and operational amplifier output terminal6。
Further, the R3、R4、R5、R6It is the precision thin-film resistor of 0.01%-0.05% for ratio matching, eliminates because of resistance
Anti- suppression common mode effect of noise, the S than mismatch0、S1、S2、R3、R4、R5、R6Between meet equation below：
Further, the R3、R4、R5、R6It is 0.03% precision thin-film resistor for ratio matching, eliminates because of impedance ratio not
Match and suppression common mode effect of noise.
Further, the 3rd low pass filter, by resistance R7With electric capacity C7Composition, the C7Ground connection so that higher than cut-off
Frequency f7Data be intercepted, the f7=1/（2ΠR7C7）, realize the anti-aliasing of Sasser data.
This utility model also provides a kind of blood pressure cuff measuring instrument, using the electricity of described extraction blood pressure cuff Sasser
Road so that the blood pressure cuff measuring instrument certainty of measurement is high, good stability, with preferable cost advantage.
Description of the drawings
Fig. 1 is circuit diagram of the present utility model.
Specific embodiment
Below in conjunction with specific embodiment, the technical solution of the utility model is elaborated, it should be understood that these enforcements
Example is merely to illustrate this utility model rather than limits scope of the present utility model, after this utility model has been read, this
Modification of the art personnel to the various equivalent form of values of the present utility model each falls within what the application claims were limited
In the range of.
Embodiment 1
The circuit of blood pressure cuff Sasser is extracted, as shown in figure 1, including pressure sensitive unit 1, for gathering blood pressure cuff
Sasser signal, and blood pressure Sasser signal is changed into into the signal of telecommunication, the signal of telecommunication includes Sasser data and pressure data, concussion
Wave number is according to through the first low pass filter, the first low pass filter, by resistance R1With electric capacity C1Composition, C1Ground connection so that higher than cut
Only frequency f1Data be intercepted, the f1=1/（2ΠR1C1）, the denoising of Sasser data is realized, data S are formed1, the pressure
Force data is through the second low pass filter, the second low pass filter, by resistance R2With electric capacity C2Composition, C2Ground connection so that higher than cut
Only frequency f2Data be intercepted, the f2=1/（2ΠR2C2）, the denoising of pressure data is realized, data S are formed2；
Amplifier unit 2, data S1Flow through electric capacity C3With resistance R3, it is connected to operational amplifier positive pole, data S2Flow through electric capacity
C4With resistance R4, it is connected to operational amplifier negative pole, S1And S2Data S are formed Jing after operational amplifier0, operational amplifier positive pole company
Reference voltage REF is met, resistance R between reference voltage and operational amplifier positive pole, is provided with5, operational amplifier negative pole and computing are put
Resistance R is provided between big device outfan6, operational amplifier is connected with power supply, power supply connection electric capacity C5, C5Ground connection, data S0Jing
Cross the 3rd low pass filter, the 3rd low pass filter, by resistance R7With electric capacity C7Composition, C7Ground connection so that higher than cut-off frequency f7
Data be intercepted, f7=1/（2ΠR7C7）, the anti-aliasing of Sasser data is realized, data S are formed3, S3Flow into micro-chip processor,
To realize measurement blood pressure.
R3、R4、R5、R6It is 0.01% precision thin-film resistor for ratio matching, eliminates because impedance ratio is mismatched and suppress
The impact of common-mode noise, the S0、S1、S2、R3、R4、R5、R6Between meet equation below：
A kind of blood pressure cuff measuring instrument, using the circuit for extracting blood pressure cuff Sasser so that the blood pressure cuff measuring instrument
Certainty of measurement is high, good stability, with preferable cost advantage.
Embodiment 2
The circuit of blood pressure cuff Sasser is extracted, as shown in figure 1, including pressure sensitive unit 1, for gathering blood pressure cuff
Sasser signal, and blood pressure Sasser signal is changed into into the signal of telecommunication, the signal of telecommunication includes Sasser data and pressure data, concussion
Wave number is according to through the first low pass filter, the first low pass filter, by resistance R1With electric capacity C1Composition, C1Ground connection so that higher than cut
Only frequency f1Data be intercepted, the f1=1/（2ΠR1C1）, the denoising of Sasser data is realized, data S are formed1, the pressure
Force data is through the second low pass filter, the second low pass filter, by resistance R2With electric capacity C2Composition, C2Ground connection so that higher than cut
Only frequency f2Data be intercepted, the f2=1/（2ΠR2C2）, the denoising of pressure data is realized, data S are formed2；
Amplifier unit 2, data S1Flow through electric capacity C3With resistance R3, it is connected to operational amplifier positive pole, data S2Flow through electric capacity
C4With resistance R4, it is connected to operational amplifier negative pole, S1And S2Data S are formed Jing after operational amplifier0, operational amplifier positive pole company
Reference voltage REF is met, resistance R between reference voltage and operational amplifier positive pole, is provided with5, operational amplifier negative pole and computing are put
Resistance R is provided between big device outfan6, operational amplifier is connected with power supply, power supply connection electric capacity C5, C5Ground connection, data S0Jing
Cross the 3rd low pass filter, the 3rd low pass filter, by resistance R7With electric capacity C7Composition, C7Ground connection so that higher than cut-off frequency f7
Data be intercepted, f7=1/（2ΠR7C7）, the anti-aliasing of Sasser data is realized, data S are formed3, S3Flow into micro-chip processor,
To realize measurement blood pressure.
R3、R4、R5、R6It is 0.03% precision thin-film resistor for ratio matching, eliminates because impedance ratio is mismatched and suppress
The impact of common-mode noise, the S0、S1、S2、R3、R4、R5、R6Between meet equation below：
A kind of blood pressure cuff measuring instrument, using the circuit for extracting blood pressure cuff Sasser so that the blood pressure cuff measuring instrument
Certainty of measurement is high, good stability, with preferable cost advantage.
Claims (9)
1. it is a kind of extract blood pressure cuff Sasser circuit, it is characterised in that include：
The Sasser signal for gathering blood pressure cuff Sasser signal, and is changed into the signal of telecommunication, institute by pressure sensitive unit
Stating the signal of telecommunication includes Sasser data and pressure data, and the Sasser data form data S through the first low pass filter1,
The pressure data forms data S through the second low pass filter2；
Amplifier unit, data S1Flow through electric capacity C3With resistance R3, it is connected to operational amplifier positive pole, data S2Flow through electricity
Hold C4With resistance R4, it is connected to operational amplifier negative pole, the S1And S2Data S are formed Jing after operational amplifierO, the computing puts
Big device positive pole connection reference voltage REF, the operational amplifier are connected with power supply, and the power supply connects electric capacity C5, the C5Connect
Ground, data S0 form data S through the 3rd low pass filter3, the S3Micro-chip processor is flowed into, to realize extracting blood pressure
Cuff Sasser.
2. the circuit of blood pressure cuff Sasser is extracted as claimed in claim 1, it is characterised in that first low-pass filtering
Device, by resistance R1With electric capacity C1Composition, the C1Ground connection.
3. the circuit of blood pressure cuff Sasser is extracted as claimed in claim 1, it is characterised in that second low-pass filtering
Device, by resistance R2With electric capacity C2Composition, the C2Ground connection.
4. the circuit of blood pressure cuff Sasser is extracted as claimed in claim 1, it is characterised in that the reference voltage and computing
Resistance R is provided between amplifier anode5。
5. the circuit of blood pressure cuff Sasser is extracted as claimed in claim 1, it is characterised in that the operational amplifier negative pole
Resistance R is provided with and operational amplifier output terminal between6。
6. as described in claim 1,4,5 is arbitrary extraction blood pressure cuff Sasser circuit, it is characterised in that the R3、R4、
R5、R6For the precision thin-film resistor that ratio matching is 0.01%-0.05%.
7. as described in claim 1,4,5 is arbitrary extraction blood pressure cuff Sasser circuit, it is characterised in that the R3、R4、
R5、R6For the precision thin-film resistor that ratio matching is 0.03%.
8. the circuit of blood pressure cuff Sasser is extracted as claimed in claim 1, it is characterised in that the 3rd low-pass filtering
Device, by resistance R7With electric capacity C7Composition, the C7Ground connection.
9. a kind of blood pressure cuff measuring instrument, it is characterised in that using the arbitrary described extraction blood pressure cuff concussion of claim 1-8
The circuit of ripple.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620740748.XU CN206044617U (en) | 2016-07-14 | 2016-07-14 | A kind of circuit and blood pressure cuff measuring instrument for extracting blood pressure cuff Sasser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620740748.XU CN206044617U (en) | 2016-07-14 | 2016-07-14 | A kind of circuit and blood pressure cuff measuring instrument for extracting blood pressure cuff Sasser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206044617U true CN206044617U (en) | 2017-03-29 |
Family
ID=58376133
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620740748.XU Expired - Fee Related CN206044617U (en) | 2016-07-14 | 2016-07-14 | A kind of circuit and blood pressure cuff measuring instrument for extracting blood pressure cuff Sasser |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206044617U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106175734A (en) * | 2016-07-14 | 2016-12-07 | 苏州咖丢卫私康信息科技有限公司 | A kind of circuit extracting blood pressure cuff Sasser and blood pressure cuff measuring instrument |
-
2016
- 2016-07-14 CN CN201620740748.XU patent/CN206044617U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106175734A (en) * | 2016-07-14 | 2016-12-07 | 苏州咖丢卫私康信息科技有限公司 | A kind of circuit extracting blood pressure cuff Sasser and blood pressure cuff measuring instrument |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170329 Termination date: 20200714 |
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| CF01 | Termination of patent right due to non-payment of annual fee |