CN102018508B - Blood pressure measuring device and method with function of eliminating action noises - Google Patents
Blood pressure measuring device and method with function of eliminating action noises Download PDFInfo
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Abstract
The invention relates to a blood pressure measuring device with a function of eliminating action noises and a method thereof. Particularly, according to the function of eliminating action noises of the blood pressure measuring device and the method, the noises caused by actions such as speech, irregular breath, frequent swallowing, coughing, swaying and the like of a testee can be eliminated. According to the blood pressure measuring device and the method, a group of fuzzy logic rules and a curve-fitting method are applied to eliminating the noises caused by the actions.
Description
Technical field
The present invention relates to a kind of blood pressure measurement device and method (blood pressure measuringapparatus and method), and especially, the present invention relates to a kind of blood pressure measuring method and device with function of eliminating the noise (motion artifact) that is caused by action, by testee (subject) speech, irregular breathing, the noise that action causes such as frequently swallow, cough, rock.
Background technology
The generation of blood pressure is because the physiological phenomenon that cardiovascular activity causes.The modern is because the change of diet work and rest, causes that to suffer from hypertensive probability more and more higher.Because hypertension is a kind of chronic disease, therefore, blood pressure self-monitoring long-term and rule just becomes hyperpietic's important daily behavior.
Along with scientific and technological progress, blood pressure measuring has been measured by previous intrusive mood and has been developed to present non-intrusion type measurement.So-called intrusive mood blood pressure measuring is with in sensor and the cardiac catheterization blood vessel, measures simultaneously the method for internal blood vessel pressure.Yet this measurement mode must cooperate operative catheter to use usually, for very inconvenience of the frequent patient who uses of general need.Therefore, the exploitation of non-invasion blood pressure measurement is another target direction of blood pressure measuring.Non-invasion blood pressure measures the most normal method of using and is mercury column sphygmomanometer, and the method needs by judging that sound comes Measure blood pressure.Yet mercury sphygmomanometer might cause the pollution on the environment.Therefore, mercury sphygmomanometer has progressively been eliminated in all parts of the world in recent years, and replacing is electronic sphygmomanometer (electronic blood pressure meter).
Most electronic sphygmomanometer adopts cuff (cuff) to be strapped in the arm of testee and around brachial artery (brachial artery).Cuff is forced into first the pressure greater than upper arm artery, and the blood flow of upper arm artery namely is obstructed gradually to measuring heartbeat and blood pressure signal.Then, cuff release pressure gradually subsequently.Along with the pressure decreased of cuff, the blood flow of the upper arm artery of flowing through increases gradually, and heartbeat and blood pressure signal also increase gradually.
Follow heart to shrink when the blood flow brachial artery of flowing through, it gives arterial wall and once palpitates from nervousness at every turn.Along with cuff pressure over time, palpitating from nervousness is connected to the cuff that coats brachial artery, it is known vibration pulse (oscillometric pulse).Electronic sphygmomanometer measures and records the amplitude of these vibration pulses at a section cuff pressure place.As shown in Figure 1, after blood pressure measuring was finished, a tables of data was included in the vibration pulse amplitude that records in each cuff pressure place and namely forms.
Theoretically speaking, systolic pressure (systolic pressure), diastolic pressure (diastolic pressure) and mean arterial blood pressure (mean arterial blood pressure) can the value from tables of data decide subsequently, and it utilizes the experiment of these parameters to be defined as the function of the amplitude of these vibration pulses.For example, as shown in Figure 2, it records a section cuff pressure and at the vibration pulse amplitude at each cuff pressure place about the tables of data of certain blood pressure measuring.In Fig. 2, mean arterial blood pressure is by defining full swing pulse amplitude and getting with full swing pulse amplitude and decide with the cuff pressure that measures time point, and the first ratio (ratio) that systolic pressure and diastolic pressure define by experiment is multiplied by respectively the vibration pulse amplitude of mean arterial blood pressure with the second ratio and decides.Yet blood pressure measuring is often affected by the caused noise of the action of testee, for example, and by testee speech, irregular breathing, the noise that action causes such as frequently swallow, cough, rock.As shown in Figure 3, the caused noise that moves can change the amplitude that measures the vibration pulse haply, and then the blood pressure measuring of testee is introduced inaccuracy.
Therefore, a scope of the present invention aims to provide a kind of blood pressure measurement device and blood pressure measuring method, and especially, has the function of eliminating the noise that is caused by action according to blood pressure measurement device of the present invention and blood pressure measuring method.
In addition, show according to Research Literature, affect the first ratio of above-mentioned decision systolic pressure and diastolic pressure and the girth (arm circumference) that the second ratio comprises the testee arm.Therefore, another scope of the present invention is to provide a kind of blood pressure measurement device and blood pressure measuring method, and especially, can measure the arm girth of testee according to blood pressure measurement device of the present invention and blood pressure measuring method, to determine exactly to calculate the first ratio and second ratio of systolic pressure and diastolic pressure.
Summary of the invention
According to the blood pressure measurement device of a preferred embodiment of the present invention, it comprises cuff, inflation unit (inflating unit), pressure transducer (pressure transducer) and control/processing unit (controlling/processing unit).Cuff is put with the arm around testee, and around the tremulous pulse in the arm.Inflation unit is coupled to cuff, and in order to cuff is inflated.Pressure transducer is coupled to cuff.Control/processing unit is coupled respectively to cuff, inflation unit and pressure transducer.Control/processing unit is inflated to initial pressure in order to control inflation unit to cuff.Control/processing unit and control cuff begin to lose heart from initial pressure.Follow cuff to begin to lose heart from initial pressure, control/processing unit obtains the cuff pressure signal and about a sequence of the back-pressure of the tremulous pulse pulse amplitude (oscillometric pulseamplitude) that initially vibrates from the pressure transducer that is coupled to cuff.Control/processing unit also imposes one group of fuzzy logic ordination (fuzzy rule) to these initial vibration pulse amplitudes, with for each initial vibration pulse other weighted value of magnitude determinations (weight).Control/processing unit and for each initial vibration pulse amplitude, revise this initial vibration pulse amplitude by the initial vibration pulse amplitude that contiguous a plurality of itself weighted values are higher than threshold value, and then obtain to replace the existing vibration pulse of the sequence amplitude of these initial vibration pulse amplitudes.Control/processing unit defines full swing pulse amplitude between these existing vibration pulse amplitudes.Control/processing unit and based on full swing pulse amplitude, cuff pressure signal, the first ratio and the second ratio determines systolic pressure and diastolic pressure about the blood pressure of this testee.
In another preferred embodiment, further comprise according to blood pressure measurement device of the present invention and be coupled to control/processing unit and be placed in measuring element in the cuff.Measuring element is in order to measure the perimeter value about the arm of testee.Control/processing unit comprises comparison list, and obtains the perimeter value of arm from measuring element.Control/processing unit decides the first ratio and the second ratio according to this perimeter value and comparison list.
According to the blood pressure measuring method of a preferred embodiment of the present invention, it uses cuff to measure the blood pressure of testee.Cuff is put with the arm around testee, and around the tremulous pulse in the arm.Blood pressure measuring method according to the present invention at first is inflated to initial pressure to cuff.Then, blood pressure measuring method according to the present invention follows cuff to begin to lose heart from initial pressure, obtains the cuff pressure signal and about a sequence of the back-pressure of this tremulous pulse pulse amplitude that initially vibrates from the pressure transducer that is coupled to cuff.Then, be that these initial vibration pulse amplitudes are imposed one group of fuzzy logic ordination according to blood pressure measuring method of the present invention, with other weighted value of pulse magnitude determinations that initially vibrates for each.Then, according to blood pressure measuring method of the present invention system for each initial vibration pulse amplitude, revise this initial vibration pulse amplitude by the initial vibration pulse amplitude that contiguous a plurality of itself weighted values are higher than threshold value, and then obtain to replace the existing vibration pulse of the sequence amplitude of these initial vibration pulse amplitudes.Then, blood pressure measuring method according to the present invention defines full swing pulse amplitude between these existing vibration pulse amplitudes.At last, blood pressure measuring method according to the present invention determines systolic pressure and diastolic pressure about the blood pressure of testee based on full swing pulse amplitude, cuff pressure signal, the first ratio and the second ratio.
Can be further understood by the following detailed description and accompanying drawings about the advantages and spirit of the present invention.
Description of drawings
Fig. 1 be when illustrating the known quantity measuring blood pressure take the time as transverse axis, measure cuff exert pressure pressure and the pulse that vibrates is the represented corresponding relation curve that goes out of the longitudinal axis.
Fig. 2 is the sketch map that the vibration pulse of the corresponding cuff pressure curve of utilization decides mean arterial blood pressure, systolic pressure and diastolic pressure.
Fig. 3 is the sketch map that the vibration pulse that measures has action noise.
Fig. 4 is according to the configuration diagram of the blood pressure measurement device of a preferred embodiment of the present invention.
Fig. 5 A is for utilizing blood pressure measurement device according to a preferred embodiment of the present invention to measure the sequence pulse amplitude value figure that initially vibrates.
Fig. 5 B is the sketch map of four kinds of features of the slope that two adjacent initial vibration pulse amplitude lines get among the sign picture 5A.
Fig. 5 C is the sketch map that the pulse amplitude is divided into the scope of MAX, MID, three part overlappings of MIN among Fig. 5 A.
Among Fig. 5 D displayed map 5A initial vibration pulse amplitude and through calculation and weighted value.
Fig. 5 E show to measure case gained one sequence initially vibrate the pulse amplitude, each initially vibrate pulse amplitude through the weighted value of calculation gained and the pulse amplitude that initially vibrates through correction and existing vibration pulse amplitude.
Fig. 6 is according to the flow chart of the blood pressure measuring method of a preferred embodiment of the present invention.
[main element symbol description]
1: blood pressure measurement device 12: cuff
14: inflation unit 16: pressure transducer
17: gas bleeder valve 18: control/processing unit
19: measure unit 2: testee
22: arm 24: tremulous pulse
3: blood pressure measuring method S30～S44: process step
The specific embodiment
See also Fig. 4, Fig. 4 is according to the configuration diagram of the blood pressure measurement device 1 of a preferred embodiment of the present invention.Fig. 4 and schematically illustrate testee 2 and testee 2 measures the arm 22 at blood pressure places.
As shown in Figure 4, blood pressure measurement device 1 according to the present invention comprises cuff 12, inflation unit 14, pressure transducer 16 and control/processing unit 18.
Be shown in equally Fig. 4, inflation unit 14 is coupled to cuff, and in order to cuff 12 is inflated.Pressure transducer 16 is coupled to cuff 12.Control/processing unit 18 is coupled respectively to cuff 12, inflation unit 14 and pressure transducer 16.In Fig. 4, direction of arrow representation signal transmit with system's controlling party to, and hollow pipe represents the connection of trachea (tube).
Control/processing unit 18 is inflated to initial pressure in order to control 14 pairs of cuffs 12 of inflation unit.In one embodiment, inflation unit 14 is a gang of Pus.
Control/processing unit 18 and control cuff 12 from initial pressure begin to lose heart, blood pressure lowering.For example, as shown in Figure 4, as electronic sphygmomanometer, establish the gas bleeder valve (deflating valve) 17 that is coupled to control/blood processor 18 in the cuff 12, control/processing unit 18 can be controlled gas bleeder valve 17 and open, and allows cuff 12 loses heart, blood pressure lowerings.
See also the related data figure of Fig. 5 A to Fig. 5 case that C discloses about the processing of blood pressure measurement device 2 its blood pressure measuring data according to the present invention.Follow cuff 12 from initial pressure begin to lose heart, blood pressure lowering, control/processing unit 18 obtains the cuff pressure signals and about a sequence of the back-pressure of the tremulous pulse 24 pulse amplitude that initially vibrates, shown in Fig. 5 A from the pressure transducer 16 that is coupled to cuff 12.In Fig. 5 A, the cuff pressure signal do not show, the round dot that indicates is the sequence numerical value of pulse amplitude through converting that initially vibrates, and its numerical value representative pressure value not.Each initial vibration pulse amplitude correspondence measures together the cuff pressure of time point with it among Fig. 5 A.
Then, control/processing unit 18 imposes one group of fuzzy logic ordination to these initial vibration pulse amplitudes, with other weighted value of pulse magnitude determinations that initially vibrates for each.The benchmark of stipulating about fuzzy logic ordination can consider two or more adjacent or not adjacent initial vibration pulse amplitude lines and the feature of slope, or the feature of the angle that forms of three adjacent initial vibration pulse amplitude lines.For example, such as the example that Fig. 5 B discloses, it is two slopes that adjacent initial vibration pulse amplitude line gets, and indicates four kinds of feature typical examples: (1) " a little steep "-precipitous a little with the circle circle; (2) " not steep "-not precipitous; (3) " steep "-precipitous; And (4) " very steep "-very precipitous.
The size that the benchmark that fuzzy logic ordination is stipulated also can be considered initial vibration pulse amplitude is positioned at the scope of pulse amplitude and stipulates, for example, shown in Fig. 5 C, be the scope that MAX, MID, MIN partly overlap with the size discrimination of pulse amplitude, then judge for the size of initial vibration pulse amplitude to belong to which scope.Be the feature that MAX, MID, three scopes systems of MIN cooperate the pulse amplitude to distribute with the size discrimination of pulse amplitude, and then this range information included in judge whether initial vibration pulse amplitude receives the influence of noise that causes because of action.Please consult simultaneously Fig. 2 and Fig. 5 C, the pulse amplitude feature that blood pressure is felt one's pulse is when the scope of MID, the degree of its change is comparatively violent, therefore the initial vibration pulse amplitude in this scope is set a higher slope range, in this slope range, be not considered as because being moved the violent change that the influence of noise that causes produces, only have when slope is higher than this slope range or is lower than this slope range just to be considered as the influence of noise that caused because moving; Otherwise, when the scope of MIN or MAX, therefore the degree of its change comparatively relaxes, and the initial vibration pulse amplitude in this scope is set a lower slope, namely is considered as because being moved the violent change that the influence of noise that causes produces in case slope is higher than this lower slope.
For input signal (cuff pressure signal and initial vibration pulse amplitude), calculate the ownership degree that it belongs to each feature in advance.After learning the ownership degree of input signal for each feature, can import the ambiguity in definition logic rule, calculate the weighted value of initial vibration pulse amplitude.So-called weighted value representative is to the confidence level of a certain initial vibration pulse amplitude; That is judge whether this initial vibration pulse amplitude has the probability that is subject to the influence of noise that causes because of action in other words; Specifically, weighted value is high represent this initial vibration pulse amplitude to receive the probability of the noise that action causes lower, and namely confidence level is higher, so the amplitude of revising in the aftermentioned flow process is less; Weighted value is low represent this initial vibration pulse amplitude to receive the probability of the noise that action causes higher, so the amplitude of revising in the aftermentioned flow process is larger.
Characteristic according to the blood pressure signal waveform of general attonity noise can define 26 fuzzy logic ordinations at least.Below only lift the definition of several fuzzy logic ordinations, as example:
″If?Amplitude?is?Min?and?Slope?is?Not?Steep(NS)，weight＝1″；
″If?Amplitude?is?Min?and?Slope?is?Very?Steep(VS)，weight＝0″；
″If?Amplitude?is?Mid?and?Slope?is?Not?Steep(NS)，weight＝0.7″；
″If?Amplitude?is?Mid?and?Slope?is?A?Little?Steep(ALS)，weight＝1″；
″If?Amplitude?is?Mid?and?Slope?is?Very?Steep(VS)，weight＝0″；
″If?Amplitude?is?Max?and?Slope?is?Not?Steep(NS)，weight＝1″；
" If Amplitude is Max and Slope is A Little Steep (ALS), weight=0.4 "; And
″If?Amplitude?is?Max?and?Slope?is?Very?Steep(VS)，weight＝0″。
Shown in Fig. 5 D, round dot is the sequence pulse amplitude that initially vibrates, and asterisk then is as calculated weighted value of gained of each initial vibration pulse amplitude.The weighted value of each initial vibration pulse amplitude is between 0～1.
Then, control/processing unit 18 and for each initial vibration pulse amplitude, the initial vibration pulse amplitude that is higher than threshold value by contiguous a plurality of itself weighted values is revised this initial vibration pulse amplitude and is calculated corresponding target vibration pulse amplitude, that is calculates or judge the lower amplitude that should present of noise that each initial vibration pulse amplitude causes in attonity (target vibrate pulse amplitude) by the higher initial vibration pulse amplitude of confidence level.And then acquisition replaces the existing vibration pulse of the sequence amplitude of these initial vibration pulse amplitudes.
In one embodiment, control/processing unit 18 is the initial vibration pulse amplitude that is higher than this threshold value for a plurality of itself the weighted values of the vicinity of each initial vibration pulse amplitude, calculates other target vibration pulse amplitude with a curve-fitting method (curve-fitting way).For instance, if the initial vibration pulse amplitude to time T is revised, then be taken at before the time T after the weighted value of (for example time (T-1) and time (T+1)) the initial vibration pulse amplitude that is higher than threshold value calculate this in target vibration pulse amplitude of the initial vibration pulse amplitude of time T with an order polynomial, quadratic polynomial or other curve fittings; If in the weighted value of the initial vibration pulse amplitude of time (T-1) less than threshold value, then be taken at forward the time (T-2) initial vibration pulse amplitude (because of confidence level lower), so repeatedly until its weighted value is higher than threshold value; In like manner, if in the weighted value of the initial vibration pulse amplitude of time (T+1) less than threshold value, then be taken at the initial vibration pulse amplitude of time (T+2), so repeatedly until its weighted value is higher than threshold value backward; It should be noted that the number that weighted value after being taken at before the time T is higher than the initial vibration pulse amplitude of threshold value does not need identical with the lead time of relative time T, for example can be taken at before the time T the initial vibration pulse amplitude that a weighted value is higher than threshold value, and the late two strokes weighted value that is taken at time T is higher than the initial vibration pulse amplitude of threshold value, at last according to above-mentioned three initial vibration pulse amplitudes to calculate this in target vibration pulse amplitude of the initial vibration pulse amplitude of time T.
Then, control/processing unit 18 calculates the existing vibration pulse amplitude that replaces this initial vibration pulse amplitude by following formula:
The existing vibration pulse amplitude=ω * pulse amplitude that initially vibrates+(1-ω) * target vibration pulse amplitude ... formula (1)
Wherein ω represents the weighted value of this vibration pulse amplitude.
By formula (1) the initial vibration pulse amplitude that weighted value is high can be described, the amplitude of its correction is less, that is the heavy relatively large initial vibration pulse amplitude of right of retention and the target vibration pulse amplitude of weight less; The initial vibration pulse amplitude that weighted value is low, the amplitude of its correction is larger, that is the initial vibration pulse amplitude of the heavy less of right of retention and the relatively large target vibration pulse amplitude of weight.
See also Fig. 5 E, initially vibrate pulse amplitude (label symbol is round dot), each pulse amplitude that initially vibrates of the sequence that Fig. 5 E show to utilize blood pressure measurement device 1 according to the present invention to obtain after a blood pressure measuring is finished calculates via conic section correction and formula (1) through the weighted value (label symbol is asterisk) of one group of fuzzy logic ordination calculation gained and the pulse amplitude that initially vibrates and gets existing vibration pulse amplitude (label symbol is triangle).
At last, control/processing unit 18 defines full swing pulse amplitude between these existing vibration pulse amplitudes, and based on full swing pulse amplitude, cuff pressure signal, the first ratio and the second ratio, namely determine systolic pressure and diastolic pressure about the blood pressure of this testee 2.That is to say, control/processing unit 18 is got with full swing pulse amplitude and is decided to be mean arterial blood pressure with the cuff pressure that measures time point, the vibration pulse amplitude of mean arterial blood pressure is multiplied by the first ratio and then systolic pressure is tried to achieve in conversion, and the vibration pulse amplitude of mean arterial blood pressure is multiplied by the second ratio and then diastolic pressure is tried to achieve in conversion.
Please consult Fig. 4, blood pressure measurement device 1 according to yet another preferred embodiment of the present invention further comprises and is coupled to control/processing unit 18 and is placed in measuring element 19 in the cuff 12 again.Measuring element 19 is in order to measure the perimeter value about the arm 22 of testee 2.Control/processing unit 18 comprises comparison list, and obtains the perimeter value of arm 22 from measuring element 19.Control/processing unit 18 determines to calculate the first ratio and two ratios of systolic pressure and diastolic pressure exactly according to this perimeter value and comparison list.
See also Fig. 6, Fig. 6 is the flow chart that one of illustrates according to the present invention the blood pressure measuring method 3 of preferred embodiment.It is to use cuff to measure the blood pressure of testee according to blood pressure measuring method of the present invention 3.Cuff is put with the arm around testee, and around the tremulous pulse in the arm.
As shown in Figure 6, according to blood pressure measuring method 3 of the present invention execution in step S30 at first, cuff is inflated to initial pressure.
Then, according to blood pressure measuring method 3 execution in step S32 of the present invention, the cuff of having inflated is begun to lose heart from initial pressure.Subsequently, according to blood pressure measuring method 3 execution in step S34 of the present invention, whether does detect cuff lose heart to suitable pressure? when cuff begins to lose heart, control/processing unit begins the records series pulse amplitude that initially vibrates, when being enough to begin to calculate systolic pressure and diastolic pressure in case control/processing unit judges that the initial vibration pulse amplitude number (sample number) that initially vibrates this sequence the pulse amplitude comprises is more than enough, this moment, the pressure of cuff was suitable pressure.From another point of view, because the disappointing speed that cuff loses heart is controlled by control/processing unit, the initial vibration pulse amplitude number (sampling rate) that per second records is also controlled by control/processing unit, therefore can extrapolate when cuff loses heart to a certain pressure, control/processing unit can record enough initial vibration pulse amplitude numbers, and this pressure is suitable pressure.
If the result of step S34 is for negating, according to 3 execution in step S36 of blood pressure measuring method of the present invention, continue to follow that cuff loses heart, blood pressure lowering, obtain the cuff pressure signal and about a sequence of the back-pressure of this tremulous pulse pulse amplitude that initially vibrates from the pressure transducer that is coupled to cuff.After step S36, blood pressure measuring method 3 according to the present invention is execution in step S38, these initial vibration pulse amplitudes is imposed one group of fuzzy logic ordination, with other weighted value of pulse magnitude determinations that initially vibrates for each.After step S36, according to blood pressure measuring method 3 repeating step S32 of the present invention, cuff is continued to lose heart.
If the result of step S34 is for affirming, according to 3 execution in step S40 of blood pressure measuring method of the present invention, for each initial vibration pulse amplitude, revise this initial vibration pulse amplitude by the initial vibration pulse amplitude that contiguous a plurality of itself weighted values are higher than threshold value, and then obtain to replace the existing vibration pulse of the sequence amplitude of these initial vibration pulse amplitudes., seldom do at this and give unnecessary details in above describing in detail about the specific embodiment of revising initial vibration pulse amplitude.
At last, according to blood pressure measuring method 3 execution in step S42 of the present invention, definition full swing pulse amplitude between these existing vibration pulse amplitudes.At last, blood pressure measuring method according to the present invention determines systolic pressure and diastolic pressure about the blood pressure of testee based on full swing pulse amplitude, cuff pressure signal, the first ratio and the second ratio.That is to say, get with full swing pulse amplitude and be decided to be mean arterial blood pressure with the cuff pressure that measures time point, the vibration pulse amplitude of mean arterial blood pressure is multiplied by the first ratio and then systolic pressure is tried to achieve in conversion, and the vibration pulse amplitude of mean arterial blood pressure is multiplied by the second ratio and then diastolic pressure is tried to achieve in conversion.
Be shown in equally Fig. 6, further comprise step S44 according to the blood pressure measuring method 3 of another preferred embodiment of the present invention, the measuring element in the cuff obtains the perimeter value about the arm of this testee.In step S42, the first ratio and the second ratio decide according to the synopsis of perimeter value and in advance foundation.
In sum, can effectively eliminate the noise that the action by testee causes according to blood pressure measurement device of the present invention and blood pressure measuring method, and by measuring the girth of testee arm, can determine exactly to calculate the first ratio and two ratios of systolic pressure and diastolic pressure.
By the above detailed description of preferred embodiments, hope can be known description feature of the present invention and spirit more, and is not to come scope of the present invention is limited with above-mentioned disclosed preferred embodiment.On the contrary, its objective is that hope can contain in the scope of claim of being arranged in of various changes and tool equality institute of the present invention wish application.Therefore, the scope of the present invention's claims required for protection should be done the broadest explanation according to above-mentioned explanation, contains the arrangement of all possible change and tool equality to cause it.
Claims (5)
1. blood pressure measurement device, this blood pressure measurement device is in order to measure a blood pressure of a testee, and this blood pressure measurement device comprises:
One cuff, this cuff is put with the arm around this testee, and a tremulous pulse is arranged in this arm;
One inflation unit, this inflation unit is coupled to this cuff, and this inflation unit is in order to inflate this cuff;
One pressure transducer, this pressure transducer is coupled to this cuff; And
One control/processing unit, this control/processing unit is coupled respectively to this cuff, this inflation unit and this pressure transducer, this control/processing unit is inflated to an initial pressure in order to control this inflation unit to this cuff, controlling this cuff begins to lose heart from this initial pressure, follow this cuff to begin to lose heart from this initial pressure, obtain a cuff pressure signal and about a sequence of the back-pressure of this tremulous pulse pulse amplitude that initially vibrates from this pressure transducer of this cuff that is coupled, this control/processing unit and to other weighted value of each initial vibration pulse magnitude determinations, this control/processing unit and for each initial vibration pulse amplitude, revise this initial vibration pulse amplitude by contiguous a plurality of initial vibration pulse amplitude and calculate corresponding target vibration pulse amplitude, to obtain to replace the existing vibration pulse of the sequence amplitude of these initial vibration pulse amplitudes, the weighted value of a plurality of initial vibration pulse amplitude of described vicinity itself is higher than threshold value, this control/processing unit defines a full swing pulse amplitude between these existing vibration pulse amplitudes, this control/processing unit and based on this full swing pulse amplitude, this cuff pressure signal, one first ratio and one second ratio, decision is about a systolic pressure and a diastolic pressure of the blood pressure of this testee
Wherein, this control/processing unit imposes one group of fuzzy logic ordination to these initial vibration pulse amplitudes, with these initial these other weighted values of vibration pulse magnitude determinations for each, and
Wherein, by following formula, calculate this existing vibration pulse amplitude that replaces this initial vibration pulse amplitude:
The existing vibration pulse amplitude=ω * pulse amplitude that initially vibrates+(1-ω) * target vibration pulse amplitude, wherein ω represents the weighted value of this initial vibration pulse amplitude.
2. blood pressure measurement device as claimed in claim 1, further comprise a measuring element, this measuring element is coupled to this control/processing unit and is placed in this cuff, this measuring element is in order to measure the perimeter value about this arm of this testee, wherein this control/processing unit comprises comparison list, and obtain this perimeter value from this measuring element, this control/processing unit determines this first ratio and this second ratio according to this perimeter value and this synopsis.
3. blood pressure measurement device as claimed in claim 1, wherein this control/processing unit calculates other target vibration pulse amplitude with a curve-fitting method.
4. preparation method of pulse amplitude that vibrates, this preparation method comprises the following step:
Acquisition is about a sequence of the back-pressure of the tremulous pulse in the arm of the testee pulse amplitude that initially vibrates;
To other weighted value of each initial vibration pulse magnitude determinations;
For each initial vibration pulse amplitude, revise this initial vibration pulse amplitude by contiguous a plurality of initial vibration pulse amplitude and calculate corresponding target vibration pulse amplitude, to obtain to replace the existing vibration pulse of the sequence amplitude of these initial vibration pulse amplitudes, the weighted value of a plurality of initial vibration pulse amplitude of described vicinity itself is higher than threshold value
Wherein, these initial vibration pulse amplitudes are imposed one group of fuzzy logic ordination with these initial these other weighted values of vibration pulse magnitude determinations to each, and
Wherein, by following formula, calculate this existing vibration pulse amplitude that replaces this initial vibration pulse amplitude:
The existing vibration pulse amplitude=ω * pulse amplitude that initially vibrates+(1-ω) * target vibration pulse amplitude, wherein ω represents the weighted value of this initial vibration pulse amplitude.
5. preparation method as claimed in claim 4 wherein calculates this other target vibration pulse amplitude with a curve-fitting method.
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