CN205964032U - Blood pressure measuring system - Google Patents
Blood pressure measuring system Download PDFInfo
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- CN205964032U CN205964032U CN201620534605.3U CN201620534605U CN205964032U CN 205964032 U CN205964032 U CN 205964032U CN 201620534605 U CN201620534605 U CN 201620534605U CN 205964032 U CN205964032 U CN 205964032U
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Abstract
The utility model discloses a blood pressure measuring system, this system include detection module, pressure sensor module, air supply module and processor module, be provided with the linearity and inflate the control part in processor module, the utility model discloses a that blood pressure measuring system's the linearity portion of inflating adopts is the mode that the linearity was stepped up, has shortened single check -out time widely, realizes the linearity through the PID real time control air pump and inflates, the accuracy of the pressure that can guarantee accurately to measure to the stability and the accuracy of atmospheric pressure oscillating wave signal can be guaranteed, and then measuring result's accuracy is guaranteed.
Description
Technical field
This utility model is related to blood pressure measurement device and in particular to a kind of blood pressure measuring system.
Background technology
Cardiovascular disease (Cardiovascular disease, CVD) current developed country mortality rate holds pride of place
Important diseases, are also mortality rate highest one class disease in China, and World Health Organization (WHO) has been classified as the 21 century harm mankind
The number one killer of health, it has become as the major public health problem in China and the world.The serious health of impact people and
Quality of life, therefore, the early prediction to cardiovascular disease and mid-term diagnoses and treatment, have and its important meaning.
Blood pressure is the weight of the physiological parameters such as reflection cardiac pumping function, vascular resistance, viscosity of blood and whole body blood volume
Want index, be clinically widely applied.Blood pressure has and significantly changes over characteristic, the single carrying out in clinic or
Few time blood pressure measurement can not reliably reflect the situation under the fluctuation and active state of blood pressure.Ambulatory blood pressure monitoring is at 24 hours
A kind of diagnostic techniquess of blood pressure under interior automatic discontinuous property Timing measurement daily life state.Because ambulatory blood pressure overcomes clinic blood
Pendulous frequency is less for pressure, the limitation of observational error and White coat effect etc., can objectively reflect practical level and the ripple of blood pressure
Dynamic situation, therefore makes a definite diagnosis, judges " white coat hypertension " and intractable hypertension, evaluates anti-height in clinical doubtful hyperpietic
The aspect such as the curative effect of blood pressure medication and guiding treatment has obtained increasingly being widely applied.Ambulatory blood pressure monitoring typically adopts oscillography
Method, it is a kind of Techniques of Non-Invasive Blood Pressure Measurement, can be using blood pressure lowering measurement and boosting measurement both of which.Blood pressure lowering measurement be first to
Cuff is inflated and is forced into arterial occlusion, then in deflation course, gathers pressure oscillation ripple in the cuff being produced by arterial pulse
Signal；And measurement of boosting is the pressure oscillation ripple signal gathering in cuff pressure process in cuff simultaneously.Oscillographic method measurement is logical
Frequently with curve fitting algorithm and coordinate amplitude coefficient to calculate pressure value, detailed process is:Peak value sequence first by the wave of oscillation
Row carry out curve fitting, static pressure (flip-flop of pressure in cuff) value, as mean pressure corresponding to matched curve maximum；
Obtain systolic pressure amplitude and diastolic pressure amplitude using maximum amplitude and amplitude coefficient, then obtained by matched curve corresponding quiet
Pressure value, as systolic pressure and diastolic pressure.
Conventional dynamic blood pressure instrument is to increased Timing measurement on the basis of electric sphygmomanometer, and reduces the body of sphygomanometer
Long-pending, to reach the 24 hours blood pressure information of acquisition that is easy to carry.It is limited in that, measurement brachial arterial pressure is on sleep impact
Larger, nighttime blood pressures measurement accuracy is vulnerable to impact, and measurement frequency is relatively low simultaneously, if effective pendulous frequency not enough measurement sum
70%, measurement data is then invalid.
Existing pressure oscillation ripple adopts upper arm cuff measuring method mostly, needs a period of time to block brachial artery blood completely
Stream, repeatedly measurement will lead to the numbness of whole upper arm and the congestion of measurement position, and pump quickly inflate during the noise that sends
Larger, easily user's sleep is impacted, the accuracy of impact night measurement.Meanwhile, existing pressure oscillation ripple is adopted mostly
Use blood pressure lowering measuring method, lead to single measurement overlong time (45-60s), Consumer's Experience is poor.
Patent documentation CN104771156A discloses a kind of blood pressure measuring method of convertible modes of inflation, and the method is directed to
Hypertensive Population, using comparatively fast linear aeration speed, uses more linear aeration speed for relatively low blood pressure people, thus shortening
Blood pressure measurement time of Hypertensive Population, also ensure that relatively low blood pressure people has enough signal data analysis pressure values.
But the method using be intended to first to distinguish user which be Hypertensive Population which be relatively low blood pressure people.Meanwhile, such as
Fruit be measure for relatively low blood pressure people if although the accuracy of measurement can be improved, but during the measurement of required cost
Between also long, because the method that it measures is by the way of cuff, if time of measuring is long, will greatly drop
The comfort level of low user；Whereas if be measure for Hypertensive Population if although measurement time shorter, can
To improve the comfort level of user, but the accuracy of measurement result also can reduce.
Patent documentation CN101612039A discloses a kind of self-adaption blood pressure detector, and this device can be according to measured
The linear aeration speed of heart rate Automatic adjusument, eliminate the impact to testing result for the individual variation, detection time is short, testing result
Accurately.But this device is mainly the speed adjusting linear inflation by the heart rate according to measured, testing result accurate
Property has much room for improvement.
Utility model content
For the deficiencies in the prior art, the purpose of this utility model aims to provide a kind of users'comfort height and measurement result
Accurately blood pressure measuring system.
For achieving the above object, this utility model adopts the following technical scheme that：
Blood pressure measuring system, including
There is the detection module of air bag, it is looped around on determination part, the initial pressure wave of oscillation for obtaining determination part is believed
Number；
Pressure sensor module, the initial pressure wave of oscillation signal for obtaining detection module is converted to voltage signal；
A/D module, for collecting voltage signal produced by pressure sensor module, and voltage signal is converted to numeral
Signal；
Gas source module, is connected with detection module by main gas circuit, provides source of the gas for air bag, including air pump；
Processor module, it is connected with pressure sensor module, A/D module and the equal signal of gas source module, in order to control pressure
Force transducer module, A/D module and gas source module；
Processor module includes linearly inflating control unit, for control detection module realize first linearly inflate pattern and
Second linearly inflates pattern, and for setting the first pressure change rate K linearly inflated in air bag in pattern1And maximum pressure
P1And second pressure change rate K linearly inflated in air bag in pattern2With maximum pressure P2Value；Wherein P1Less than P2.
Wave of oscillation extraction unit and blood pressure parameter calculating part is also included in described processor module；Wherein, the wave of oscillation carries
Portion is taken to be used for digital signal produced by A/D module is extracted to analyze acquisition final pressure wave of oscillation signal；Blood pressure parameter
Calculating part, calculates blood pressure parameter value for the final pressure wave of oscillation signal being obtained according to wave of oscillation extraction unit.
Described blood pressure measuring system also includes solenoid valve module, for control detection module and main gas circuit connection whether,
To control the inflation/deflation to air bag；User interactive module, for showing detection information and receive user instruction in real time.
Described A/D module includes the A/D converter of one 24 50Hz.
Described detection module is fingerstall.
The beneficial effects of the utility model are：
The linearly portion of inflating of blood pressure measuring system of the present utility model uses the mode of operation of linear boosting, greatly
Shorten the detection time of single, realize linearly inflating by PID real-time control air pump, can accurately ensure measured
Pressure accuracy, thereby may be ensured that stability and the accuracy of air pressure wave of oscillation signal, and then ensure measurement result
Accuracy.
Brief description
Fig. 1 is the structured flowchart of this utility model blood pressure measuring system；
Fig. 2 is the flow chart linearly inflated；
The flow chart that Fig. 3 extracts for the wave of oscillation；
Fig. 4 is PID control block diagram；
Fig. 5 is linearly to inflate design sketch；
Fig. 6 is the ramp signal of linear rise stage and matching；
Fig. 7 be direct high pass after wave of oscillation signal design sketch；
Fig. 8 is the design sketch of the wave of oscillation signal after removing ramp signal and high pass；
In figure：1st, detection module；2nd, pressure sensor module；3rd, A/D module；4th, linearly inflate portion；5th, processor module；
6th, gas source module；7th, solenoid valve module；8th, power module；9th, user interactive module；10th, wave of oscillation extraction unit；11st, blood pressure parameter
Calculating part.
Specific embodiment
Below, in conjunction with accompanying drawing and specific embodiment, this utility model is described further：
Embodiment 1
As shown in figure 1, this utility model blood pressure measuring system includes the detection module 1 with air bag, it is looped around mensure
In portion, for obtaining the initial pressure wave of oscillation signal of determination part；Pressure sensor module 2, for obtain detection module 1
Initial pressure wave of oscillation signal is converted to voltage signal；A/D module 3, can adopt single-chip microcomputer, FPGA, ARM etc., for collecting pressure
The temperature signal of voltage signal and system, electric quantity signal etc. produced by sensor assembly 2, and by corresponding voltage signal
Be converted to digital signal；Gas source module 6, is connected with detection module by main gas circuit, provides source of the gas for air bag, thus producing extruding
Pressure needed for determination part, including air pump and constant-current stabilizer；
Processor module 5, it is connected with pressure sensor module 2, A/D module 3, the equal signal of gas source module 61, in order to control
Pressure sensor module 2, A/D module 3, gas source module 6.That is processor module 5 is other moulds for controlling the system
The work of block and the signal for processing A/D module 3.
Wherein, processor module 5 includes linearly inflating control unit 4, linearly beats for controlling detection module 1 to realize first
Gas pattern and second linearly inflates pattern, and for setting the first pressure change rate K linearly inflated in air bag in pattern1With
Maximum pressure P1And second pressure change rate K linearly inflated in air bag in pattern2With maximum pressure P2Value；Wherein P1Little
In P2；
Described first linearly the pattern of inflating be：After airbag aeration, Real-time Collection refers to the real-time pressure P in air bag and calculates reality
When pressure change rate K, P be less than P1Before, pressure change rate K is followed the tracks of by PID real-time regulation air pump voltage U1, until real
Pressure in existing air bag linearly rises to P from 01；
Described second linearly the pattern of inflating be：It is more than P in P1And it is less than P2Before, by PID real-time regulation air pump voltage U
To follow the tracks of pressure change rate K2, up to the pressure realized in air bag from P1Linearly rise to P2；When P is more than P2Afterwards, air bag stops filling
Gas.
That is, linearly inflating of detection module 1 is realized by PID real-time control air pump, specifically as Fig. 4 institute
Show, using real-time change rate k of pressure in detection module 1 air bag as PID control amount, by pressure change rate target setting value
(K1And K2), compare with currently real-time pressure change rate k that feedback obtains, obtain controlling error as the input of PID control
Amount, then output is calculated by increment type PID, (air pump exports air bag to tolerance Q of control air pump regulation output to air bag
Tolerance Q mainly realized by controlling the voltage of air pump), detect that the pressure in air bag to enter finally by pressure transducer
Row PID adjustment next time.So, by carrying out feedback adjustment to the rate of change k measuring in real time, can accurately ensure to be surveyed
The accuracy of the pressure measured, thereby may be ensured that stability and the accuracy of air pressure wave of oscillation signal, and then ensures that blood pressure is surveyed
The accuracy of amount result.
Wherein, above-mentioned air pump voltage U is tried to achieve by following relational expression：
U=Kp*e+Ki* ∑ e+kd* Δ e
Wherein：Kp is proportional unit coefficient；Ki is integral unit coefficient；Kd is differentiation element coefficient；Δ e is the micro- of error
Point, equal to the difference of error current and front first-order error；
E is to control error：E=K-Kn；Kn is K1Or K2；
K=Pi-P(i-1)；PiFor current collection point pressure value, P(i-1)Pressure for the previous collection point of current collection point
Value.
By above-mentioned relational expression, the voltage U of air pump can be accurately controlled, and then air pump can be accurately controlled and adjust
Export tolerance Q of air bag.
Wherein, above-mentioned processor module 5 also includes wave of oscillation extraction unit 10 and blood pressure parameter calculating part 11；Its
In, wave of oscillation extraction unit 10 is used for digital signal produced by A/D module being extracted to analyze the acquisition final pressure wave of oscillation
Signal；Blood pressure parameter calculating part 11, calculates for the final pressure wave of oscillation signal being obtained according to wave of oscillation extraction unit 10
Draw blood pressure parameter value.
Additionally, above-mentioned measuring system also includes solenoid valve module 7, for controlling the connection of detection module 1 and main gas circuit
Whether, to control the inflation/deflation to air bag, to use two-position three way magnetic valve, to connect air, detection module 1 and source of the gas respectively
Module 6.
User operation for convenience, above-mentioned measuring system also includes user interactive module 9, for showing detection in real time
Information and receive user information.
Wherein, above-mentioned A/D module 3 includes A/D converter and supporting auxiliary circuit, and wherein, A/D converter uses
The A/D converter of 24 50Hz, using 24 A/D converters without dynamic gain and related modulate circuit, hardware, it is possible to reduce
The wave distortion that the complexity of circuit and circuit filtering cause, user adaptation is good, can be effectively prevented from air pump and produce noise.
Above-mentioned detection module 1 is fingerstall, and user only fingerstall need to be sleeved on finger, you can carry out the measurement of blood pressure,
Using extremely convenient.Meanwhile, compared with existing oversleeve, brachial artery flow need not be blocked, maximum possible reduces to patient's
Impact, especially to the impact in sleep.
Embodiment 2
The present embodiment be embodiment 1 in blood pressure measuring system operational approach, as shown in Fig. 2 the method specifically include as
Under step：
S1, will be used for detecting pressure oscillation ripple and there is the detection module of air bag be looped around measurement site；
S2, the Working mode set of detection module is linearly inflated pattern and second for first linearly inflate pattern, set
First pressure change rate K linearly inflated in detection module air bag in pattern1(as 40/fs) and maximum pressure P1(as 40mmHg)
And second pressure change rate K linearly inflated in air bag in pattern2(as 120/ (14*fs)) and maximum pressure P2(such as
160mmHg)；Certainly, before setting the mode of operation of detection module, initialization apparatus are needed.
Additionally, in order to be able to farthest shorten time of measuring, as shown in figure 5, pattern that first linearly can inflate sets
For quickly inflating the stage (pressure from 0 to 40mmHg, about 1s), second linearly inflate pattern be inflate the stage at a slow speed (pressure from
40 to 160mmHg, about 14s).That is, to realize the side linearly inflated using this utility model blood pressure measuring system
Formula, time of single measurement only needs 15S, or even shorter, and (time of single measurement needs with existing blood pressure lowering measuring method
45-60s) significantly shorten time of measuring, such that it is able to significantly improve the comfort level of user.Certainly, above-mentioned
One linearly inflates pattern and second linearly inflates the time of measuring of pattern, can be set different according to the demand of different user
Value.
S3, air pump start, and Real-time Collection refers to the pressure P in air bag and calculates pressure change rate K, are less than P in P1Before, lead to
Cross PID real-time regulation air pump voltage U to follow the tracks of target, pressure rate of change K1, detect mould in pattern until realizing first and linearly inflating
Pressure in block air bag linearly rises to P from 01；
In the same manner, it is more than P in P1And it is less than P2Before, target, pressure change is followed the tracks of by PID real-time regulation air pump voltage U
Rate K2, until realizing the second pressure linearly inflated in detection module air bag in pattern from P1Linearly rise to P2；
As P is more than P2, then air pump stopping is inflated, and carries out Rapid degassing to air bag, and this measurement terminates.
Air pump voltage U in above-mentioned steps S3 is tried to achieve by following relational expression：
U=Kp*e+Ki* ∑ e+kd* Δ e
Wherein：Kp is proportional unit coefficient；Ki is integral unit coefficient；Kd is differentiation element coefficient；Δ e error micro-
Point, equal to the difference of error current and front first-order error；
E is to control error：E=K-Kn；Kn is K1Or K2；
K=Pi-P(i-1)；PiFor current collection point pressure value, P(i-1)Pressure for the previous collection point of current collection point
Value.
Additionally, can also extract to wave of oscillation signal in step s3 simultaneously, as shown in figure 3, this wave of oscillation extracts
Flow process is：Choose P first1Above pressure waveform data, passes it through the low pass software filtering of 3Hz, then passes through least square
Method matching obtains the ramp signal of reality, by P1Above raw pressure signal deducts the ramp signal that matching obtains, as Fig. 6 institute
Show, the envelope effect of the wave of oscillation is good, and algorithm is simple, realize beneficial on single-chip microcomputer；Finally again through the software high pass of 0.5Hz
Filtering, you can obtain final wave of oscillation signal, effect is as shown in Figure 8.The wave of oscillation effect being obtained using this utility model operation
Significantly better than the wave of oscillation effect being obtained using conventionally employed band filter operational approach, effect is specifically as shown in Figure 7.
Finally blood pressure parameter value can be calculated according to final pressure wave of oscillation signal, by the final pressure being obtained
Wave of oscillation signal is more accurate, therefore can ensure that the accuracy of calculated blood pressure parameter value.
Additionally, for the comfort level improving user, above-mentioned detection module is fingerstall version.That is, using
Family only fingerstall need to be sleeved on finger, you can carry out the measurement of blood pressure, using extremely convenient.
It will be apparent to those skilled in the art that can technical scheme as described above and design, make other various
Corresponding change and deformation, and all these change and deformation all should belong to the protection of this utility model claim
Within the scope of.
Claims (5)
1. blood pressure measuring system is it is characterised in that include
There is the detection module of air bag, it is looped around on determination part, for obtaining the initial pressure wave of oscillation signal of determination part；
Pressure sensor module, the initial pressure wave of oscillation signal for obtaining detection module is converted to voltage signal；
A/D module, for collecting voltage signal produced by pressure sensor module, and voltage signal is converted to digital signal；
Gas source module, is connected with detection module by main gas circuit, provides source of the gas for air bag, including air pump；
Processor module, it is connected with pressure sensor module, A/D module and the equal signal of gas source module, passes in order to control pressure
Sensor module, A/D module and gas source module；
Processor module includes linearly inflating control unit, linearly inflates pattern and second for controlling detection module to realize first
Linearly inflate pattern, and for setting the first pressure change rate K linearly inflated in air bag in pattern1With maximum pressure P1With
And second pressure change rate K linearly inflated in air bag in pattern2With maximum pressure P2Value；Wherein P1Less than P2.
2. blood pressure measuring system as claimed in claim 1 is it is characterised in that also include the wave of oscillation in described processor module
Extraction unit and blood pressure parameter calculating part；Wherein, wave of oscillation extraction unit is used for digital signal produced by A/D module is carried
Take and obtain final pressure wave of oscillation signal to analyze；Blood pressure parameter calculating part, for being obtained according to wave of oscillation extraction unit
End pressure wave of oscillation signal and calculate blood pressure parameter value.
3. blood pressure measuring system as claimed in claim 1, it is characterised in that also including solenoid valve module, detects for controlling
Whether the connection of module and main gas circuit, to control the inflation/deflation to air bag；User interactive module, for showing detection letter in real time
Breath and receive user instruction.
4. blood pressure measuring system as claimed in claim 1 or 2 is it is characterised in that described A/D module includes one 24 50Hz's
A/D converter.
5. blood pressure measuring system as claimed in claim 1 is it is characterised in that described detection module is fingerstall.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620534605.3U CN205964032U (en) | 2016-06-03 | 2016-06-03 | Blood pressure measuring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620534605.3U CN205964032U (en) | 2016-06-03 | 2016-06-03 | Blood pressure measuring system |
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| CN205964032U true CN205964032U (en) | 2017-02-22 |
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ID=58020486
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110743070A (en) * | 2019-10-18 | 2020-02-04 | 无锡康莱医疗科技有限公司 | Air bag pressure adjusting device and method for artificial airway management |
| CN117898690A (en) * | 2024-03-19 | 2024-04-19 | 深圳市微克科技股份有限公司 | Inflation control method, inflation control system and storage medium for watch type blood pressure detection |
-
2016
- 2016-06-03 CN CN201620534605.3U patent/CN205964032U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110743070A (en) * | 2019-10-18 | 2020-02-04 | 无锡康莱医疗科技有限公司 | Air bag pressure adjusting device and method for artificial airway management |
| CN117898690A (en) * | 2024-03-19 | 2024-04-19 | 深圳市微克科技股份有限公司 | Inflation control method, inflation control system and storage medium for watch type blood pressure detection |
| CN117898690B (en) * | 2024-03-19 | 2024-05-24 | 深圳市微克科技股份有限公司 | Inflation control method, inflation control system and storage medium for watch type blood pressure detection |
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