CN203828915U - Device for measuring blood pressure - Google Patents
Device for measuring blood pressure Download PDFInfo
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- CN203828915U CN203828915U CN201420146521.3U CN201420146521U CN203828915U CN 203828915 U CN203828915 U CN 203828915U CN 201420146521 U CN201420146521 U CN 201420146521U CN 203828915 U CN203828915 U CN 203828915U
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- 230000036772 blood pressure Effects 0.000 title claims abstract description 31
- 238000006243 chemical reaction Methods 0.000 claims abstract description 8
- 238000004364 calculation method Methods 0.000 claims abstract description 6
- 238000001914 filtration Methods 0.000 claims description 12
- 230000001133 acceleration Effects 0.000 claims description 6
- 239000012528 membrane Substances 0.000 claims description 6
- 230000002452 interceptive effect Effects 0.000 claims description 5
- 238000004458 analytical method Methods 0.000 claims description 3
- 238000000605 extraction Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 238000004088 simulation Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 7
- 238000001125 extrusion Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 5
- 230000035487 diastolic blood pressure Effects 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 4
- 230000035488 systolic blood pressure Effects 0.000 description 4
- 101000637031 Homo sapiens Trafficking protein particle complex subunit 9 Proteins 0.000 description 3
- 102100031926 Trafficking protein particle complex subunit 9 Human genes 0.000 description 3
- 210000001367 artery Anatomy 0.000 description 3
- 238000010009 beating Methods 0.000 description 3
- 230000017531 blood circulation Effects 0.000 description 2
- 238000009530 blood pressure measurement Methods 0.000 description 2
- 210000004204 blood vessel Anatomy 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 208000003443 Unconsciousness Diseases 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004873 systolic arterial blood pressure Effects 0.000 description 1
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- Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
Abstract
The utility model discloses a device for measuring blood pressure. The device comprises a sleeve belt, a vibration signal acquisition unit, an air pressure sensor, an AD (Analog-to-Digital) conversion unit and a calculation unit, wherein the vibration signal acquisition unit is used for acquiring a pulse vibration signal in an upper arm; the air pressure sensor is used for acquiring an air pressure signal acting on the human body arm sleeve belt; the AD conversion unit is used for converting an analog pulse vibration signal and the air pressure signal into a digital signal and used for transmitting the digital signal to the calculation unit; the calculation unit is used for calculating the blood pressure of a tester according to the digital signal. The utility model provides the device for measuring blood pressure, which can eliminate pulse signal interference due to air pressure change caused by extrusion of the sleeve belt, is high in anti-interference capability and higher in measurement precision.
Description
Technical field
the present invention relates to medical monitoring technical field, particularly non-invasive blood pressure is guarded field, is specifically related to a kind of device of Measure blood pressure.
Background technology
monitor is patient care equipment conventional in medical institutions.Wherein, the monitoring of non-invasive blood pressure is one of the most frequently used in patient care and most important function.Non-invasive blood pressure monitoring can comparatively fast and accurately be carried out, and has improved the efficiency of monitor monitoring.
succusion Measure blood pressure is a kind of non-invasive blood pressure measuring method being most widely used now.By the cuff inflation to being wrapped in experimenter's upper arm, make more than air pressure reaches systolic arterial pressure, reach the object of interruption artery blood flow, then gradually the gas in the middle of cuff is emitted in the mode of step (or linear), deflation course detects the size variation of the oscillator signal in the middle of cuff simultaneously, thereby measures experimenter's blood pressure.
current this method, because oscillator signal and air pressure signal mix, when outside exists in situation about disturbing, as unconscious extruding or while beaing cuff, can in cuff, produce the interfering signal that is similar to human pulse ripple, if interfering signal is rule relatively, can have a huge impact measurement result, and owing to being to introduce from front end, after the physics filtering of cuff air-capacitor, Digital Signal Processing is difficult to remove completely, and even identification all has difficulties.
Summary of the invention
for overcoming above-mentioned defect, object of the present invention is to provide a kind of device of Measure blood pressure.
A kind of device of Measure blood pressure comprises,
Cuff;
Vibration signal acquiring unit, described vibration signal acquiring unit is installed on cuff, and described vibration signal acquiring unit obtains the pulse vibration signal in upper arm;
Atmospheric pressure sensor, described atmospheric pressure installation of sensors is in cuff, for gathering the atmospheric pressure signal that acts on human arm cuff;
AD converting unit, described AD converting unit is connected with the gentle pressure transducer of vibration signal acquiring unit respectively, for the pulse oscillator signal of simulation and atmospheric pressure signal are converted to digital atmospheric pressure signal and digital pulse oscillator signal, make two signals of digital atmospheric pressure signal and digital pulse oscillator signal synchronize simultaneously;
Computing unit, described computing unit is connected with AD converting unit, also for the Synchronization Analysis to digital pulse vibration signal and digital atmospheric pressure signal, calculates experimenter's blood pressure according to different atmospheric pressures.
Further, described vibration signal acquiring unit be installed on cuff be close to experimenter's upper arm pulse and relatively cuff away from heart one side.
Improve as one, between vibration signal acquiring unit and AD converting unit, also comprise,
The first amplifying circuit, described the first amplifying circuit is connected with vibration signal acquiring unit, is amplified to for the pulse oscillator signal that vibration signal acquiring unit is obtained the amplitude of being convenient to digital-to-analogue conversion processing;
The first filter circuit, described the first filter circuit is connected with the first amplifying circuit, for the pulse oscillator signal after amplifying is carried out to filtering, removes the interference of low frequency and high frequency.
Improve as one, between atmospheric pressure sensor and AD converting unit, also comprise,
Signal condition unit, described signal condition unit is connected with atmospheric pressure sensor, for the atmospheric pressure signal of atmospheric pressure sensor acquisition is amplified and Filtering Processing, and atmospheric pressure signal after treatment is sent to AD converting unit.
Moreover described signal condition unit comprises the second amplifying circuit and the second filter circuit;
Described the second amplifying circuit is connected with pressure transducer, for by the ultra-weak electronic signal of pressure transducer conversion, is amplified to the amplitude of being convenient to processing;
Described the second filter circuit is connected with the second amplifying circuit, and described the second filter circuit is used for atmospheric pressure signal to carry out Filtering Processing, and the atmospheric pressure signal after Filtering Processing is transferred to AD converting unit.
Further, described computing unit specifically comprises,
Signal Pretreatment unit, for carrying out pretreatment to digital pulse vibration signal and digital atmospheric pressure signal;
Pulse recognition unit, for obtain the information of pulse wave relative amplitude from pulse oscillator signal, identifies interfering signal;
Pulse extraction unit, for from each different pressure platform, picks out the pulse wave amplitude that can represent current pressure platform;
Parameter calculation unit, for obtaining the pulse wave amplitude under all platforms, and restores the envelope waveform of pulse wave amplitude, thereby calculates pressure value.
Further, described vibration signal acquiring unit specifically adopts one or several in acceleration signal sensor or changing sensor or piezoelectric membrane to obtain and simulate the pulse vibration signal in upper arm.
The device of a kind of Measure blood pressure described in the utility model, because acceleration signal sensor, changing sensor, piezoelectric membrane can obtain pulse oscillator signal by induction arteriopalmus very delicately.Therefore by obtaining people's oscillation body pulse wave at the human body upper arm artery place of beating placement acceleration signal sensor, changing sensor, piezoelectric membrane.And existing NIBP measuring device is by obtaining pulse oscillator signal in cuff air pressure, cannot avoid the interference that causes due to the air pressure change brought of extruding cuff, easily the measurement result of pulse wave signal is exerted an influence.This utility model now provides a kind of can eliminate the device that causes the changing sensor Measure blood pressure of pulse signal interference due to extruding air pressure change that cuff brings, and its capacity of resisting disturbance is strong, and certainty of measurement is higher.
Brief description of the drawings
for ease of explanation, the present invention is described in detail by following preferred embodiment and accompanying drawing.
fig. 1 is the device block diagram of a kind of Measure blood pressure of this utility model;
fig. 2 is the device computing unit block diagram of a kind of Measure blood pressure of this utility model.
Detailed description of the invention
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
A device for Measure blood pressure, comprises, cuff, vibration signal acquiring unit, the first amplifying circuit, the first filter circuit, atmospheric pressure sensor, signal condition unit, AD converting unit, computing unit.
Cuff is wound in experimenter's upper arm in blood pressure measurement process, and for blocking blood flow, and conduct gathers the carrier of the sensor of experimenter's pulse signal.
Described vibration signal acquiring unit obtains the pulse vibration signal in upper arm, is the important information input of calculating for non-invasive blood pressure.Described vibration signal acquiring unit specifically adopts one or several in acceleration signal sensor or changing sensor or piezoelectric membrane to obtain and simulate the pulse vibration signal in upper arm.Described vibration signal acquiring unit is installed on the also relative cuff of upper arm pulse of being close to experimenter on cuff away from heart one side, because the pulse of upper arm is beaten stronger herein.In blood pressure measurement process, working as cuff pressure changes, make upper arm blood vessel be subject to extruding in various degree, distal vessels is along with blood vessel folding changes and the pulse variation of beating that occurs, because vibration signal acquiring unit is measured and can be obtained fainter signal with respect to NIBP, and what obtain is AC signal, be therefore not easy to be subject to the impact that waits low frequency of baseline drift.
The first amplifying circuit, described the first amplifying circuit is connected with vibration signal acquiring unit, is amplified to for the pulse oscillator signal that vibration signal acquiring unit is obtained the amplitude of being convenient to digital-to-analogue conversion processing;
The first filter circuit, described the first filter circuit is connected with the first amplifying circuit, for the pulse oscillator signal after amplifying is carried out to filtering, removes the interference of low frequency and high frequency; Conventionally select the signal of 0.5Hz-4Hz left and right to think useful pulse oscillator signal, and filtered signal is passed to AD converting unit.
Atmospheric pressure sensor, described atmospheric pressure installation of sensors, in cuff, for gathering the atmospheric pressure signal that acts on human arm cuff, and converts atmospheric pressure signal to the signal of telecommunication.
Signal condition unit, described signal condition unit is connected with pressure transducer.Described signal condition unit comprises the second amplifying circuit and the second filter circuit; Described the second amplifying circuit is connected with pressure transducer, for by the ultra-weak electronic signal of pressure transducer conversion, is amplified to the amplitude of being convenient to processing; Described the second filter circuit is connected with the second amplifying circuit, described the second filter circuit is for carrying out Filtering Processing to atmospheric pressure signal, suppress part Noise and Interference, retain the atmospheric pressure signal of low frequency, obtain relatively pure signal, conventionally choose the signal below 0.5Hz, and the atmospheric pressure signal after Filtering Processing is transferred to AD converting unit.
AD converting unit, described AD converting unit connects with the first filter circuit respectively and the second filter circuit is connected, reception comes from the atmospheric pressure signal of the second filter circuit and the pulse oscillator signal of the first filter circuit, the pulse oscillator signal of simulation and atmospheric pressure signal are converted to digital atmospheric pressure signal and digital pulse oscillator signal, are convenient to computing unit and carry out signal processing and result calculating; And atmospheric pressure signal and pulse oscillator signal are sampled into digital signal by constant duration, guarantee atmospheric pressure signal is synchronizeed with two channel signals of pulse oscillator signal.
Computing unit, described computing unit is connected with AD converting unit, completes the Synchronization Analysis to pulse vibration signal and atmospheric pressure signal.Under different atmospheric pressures, the amplitude size of corresponding pulse vibration signal, obtains corresponding pulse vibration envelope signal, according to pulse vibration envelope signal, calculates experimenter's pressure value.Described pressure value comprises mean pressure, systolic pressure and diastolic pressure.Described computing unit can also carry out some conventional digital signal pretreatment to pressure and pulse oscillator signal before calculating, to obtain better result.
Described computing unit specifically comprises:
Signal Pretreatment unit, for carrying out pretreatment to digital pulse vibration signal and digital atmospheric pressure signal; Can further suppress to disturb, reach the object that improves measurement accuracy.
Pulse recognition unit, for obtain the information of pulse wave relative amplitude from pulse oscillator signal, identifies interfering signal;
Pulse extraction unit, from each different atmospheric pressure platform, picks out the pulse wave amplitude that can represent current pressure platform.Conventionally the pulse wave amplitude under same pressure platform can be averaged to the pulse wave amplitude using meansigma methods under this pressure.
Parameter calculation unit, obtain the pulse wave amplitude under all platforms, and restore the envelope waveform of pulse wave amplitude, finding out pressure corresponding to envelope summit is mean pressure, then be multiplied by systolic pressure and diastolic pressure coefficient (being generally 0.5 and 0.7) by amplitude peak in envelope curve, calculate the amplitude that systolic pressure and diastolic pressure are corresponding, and then the left and right sides on envelope summit searches respectively corresponding amplitude, thereby calculate systolic pressure and diastolic pressure.
The device of a kind of Measure blood pressure described in the utility model, because changing sensor can obtain pulse oscillator signal by induction arteriopalmus very delicately.Therefore by obtaining people's oscillation body pulse wave at the human body upper arm artery place of beating placement acceleration signal sensor, changing sensor, piezoelectric membrane.And existing NIBP measuring device is by obtaining pulse oscillator signal in cuff air pressure, cannot avoid the interference that causes due to the air pressure change brought of extruding cuff, easily the measurement result of pulse wave signal is exerted an influence.This utility model now provides a kind of can eliminate the device that causes the Measure blood pressure of pulse signal interference due to extruding air pressure change that cuff brings, and its capacity of resisting disturbance is strong, and certainty of measurement is higher.
the foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all interior done any amendments in the spirit and principles in the present invention, be equal to and replace and improvement etc., all should be included in protection scope of the present invention in.
Claims (7)
1. a device for Measure blood pressure, is characterized in that comprising,
Cuff;
Vibration signal acquiring unit, described vibration signal acquiring unit is installed on cuff, and described vibration signal acquiring unit obtains and simulates the pulse vibration signal in upper arm;
Atmospheric pressure sensor, described atmospheric pressure installation of sensors is in cuff, for gathering the atmospheric pressure signal that acts on human arm cuff;
AD converting unit, described AD converting unit is connected with the gentle pressure transducer of vibration signal acquiring unit respectively, for the pulse oscillator signal of simulation and atmospheric pressure signal are converted to digital atmospheric pressure signal and digital pulse oscillator signal, make two signals of digital atmospheric pressure signal and digital pulse oscillator signal synchronize simultaneously;
Computing unit, described computing unit is connected with AD converting unit, also for the Synchronization Analysis to digital pulse vibration signal and digital atmospheric pressure signal, calculates experimenter's blood pressure according to different atmospheric pressures.
2. the device of Measure blood pressure as claimed in claim 1, is characterized in that, described vibration signal acquiring unit be installed on cuff be close to experimenter's upper arm pulse and relatively cuff away from heart one side.
3. the device of Measure blood pressure as claimed in claim 1 or 2, is characterized in that also comprising between vibration signal acquiring unit and AD converting unit,
The first amplifying circuit, described the first amplifying circuit is connected with vibration signal acquiring unit, is amplified to for the pulse oscillator signal that vibration signal acquiring unit is obtained the amplitude of being convenient to digital-to-analogue conversion processing;
The first filter circuit, described the first filter circuit is connected with the first amplifying circuit, for the pulse oscillator signal after amplifying is carried out to filtering, removes the interference of low frequency and high frequency.
4. the device of Measure blood pressure as claimed in claim 3, is characterized in that also comprising between atmospheric pressure sensor and AD converting unit,
Signal condition unit, described signal condition unit is connected with atmospheric pressure sensor, for the atmospheric pressure signal of atmospheric pressure sensor acquisition is amplified and Filtering Processing, and atmospheric pressure signal after treatment is sent to AD converting unit.
5. the device of Measure blood pressure as claimed in claim 4, is characterized in that, described signal condition unit comprises the second amplifying circuit and the second filter circuit;
Described the second amplifying circuit is connected with pressure transducer, for by the ultra-weak electronic signal of pressure transducer conversion, is amplified to the amplitude of being convenient to processing;
Described the second filter circuit is connected with the second amplifying circuit, and described the second filter circuit is used for atmospheric pressure signal to carry out Filtering Processing, and the atmospheric pressure signal after Filtering Processing is transferred to AD converting unit.
6. the device of Measure blood pressure as claimed in claim 5, is characterized in that, described computing unit specifically comprises,
Signal Pretreatment unit, for carrying out pretreatment to digital pulse vibration signal and digital atmospheric pressure signal;
Pulse recognition unit, for obtain the information of pulse wave relative amplitude from pulse oscillator signal, identifies interfering signal;
Pulse extraction unit, for from each different pressure platform, picks out the pulse wave amplitude that can represent current pressure platform;
Parameter calculation unit, for obtaining the pulse wave amplitude under all platforms, and restores the envelope waveform of pulse wave amplitude, calculates pressure value.
7. the device of Measure blood pressure as claimed in claim 6, is characterized in that, described vibration signal acquiring unit specifically adopts one or several in acceleration signal sensor or changing sensor or piezoelectric membrane to obtain and simulate the pulse vibration signal in upper arm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420146521.3U CN203828915U (en) | 2014-03-28 | 2014-03-28 | Device for measuring blood pressure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420146521.3U CN203828915U (en) | 2014-03-28 | 2014-03-28 | Device for measuring blood pressure |
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| CN203828915U true CN203828915U (en) | 2014-09-17 |
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| CN201420146521.3U Expired - Lifetime CN203828915U (en) | 2014-03-28 | 2014-03-28 | Device for measuring blood pressure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106137161A (en) * | 2015-04-07 | 2016-11-23 | 刘红超 | A kind of heart rate and blood pressure measurement apparatus and method |
| CN106137163A (en) * | 2015-04-07 | 2016-11-23 | 刘红超 | A kind of heart rate measurement apparatus and method |
| CN108852442A (en) * | 2017-05-12 | 2018-11-23 | 柯惠Lp公司 | Blood pressure measurement surgical operating instrument |
-
2014
- 2014-03-28 CN CN201420146521.3U patent/CN203828915U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106137161A (en) * | 2015-04-07 | 2016-11-23 | 刘红超 | A kind of heart rate and blood pressure measurement apparatus and method |
| CN106137163A (en) * | 2015-04-07 | 2016-11-23 | 刘红超 | A kind of heart rate measurement apparatus and method |
| CN108852442A (en) * | 2017-05-12 | 2018-11-23 | 柯惠Lp公司 | Blood pressure measurement surgical operating instrument |
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Granted publication date: 20140917 |