CN105105733A - Blood pressure measuring system and method capable of implementing continuous tracking on blood pressure value - Google Patents
Blood pressure measuring system and method capable of implementing continuous tracking on blood pressure value Download PDFInfo
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- CN105105733A CN105105733A CN201510501291.7A CN201510501291A CN105105733A CN 105105733 A CN105105733 A CN 105105733A CN 201510501291 A CN201510501291 A CN 201510501291A CN 105105733 A CN105105733 A CN 105105733A
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Abstract
The invention relates to a blood pressure measuring system and method capable of implementing continuous tracing on a blood pressure value. The blood pressure measuring system comprises an optical sensor module, a pulse wave signal generation module, a pulse wave propagation time calculation module and a blood pressure value calculation module, wherein the optical sensor module is used for emitting light to the surface of human skin and acquiring light intensity variation data after the surface of the human skin is modulated by human tissues; the pulse wave signal generation module is used for carrying out processing according to the light intensity variation data to obtain a pulse wave signal; the pulse wave propagation time calculation module is used for extracting pulse wave propagation time from the pulse wave signal according to pulse wave feature points; the blood pressure value calculation module is used for carrying out calculation according to the pulse wave propagation time so as to obtain the blood pressure value. According to the system and the method which adopt the structure, a cuff does not need to be bound, other signals such as ECG (Electrocardiograph) or heart sound and the like do not need to be acquired, a complex time synchronization system does not need to be compared, real-time tracking on the blood pressure value can be implemented by only acquiring the light intensity variation data after modulation of the human tissues, a data acquisition quantity is small, a calculation quantity is small, measurement is rapid and efficient to carry out, and the system and the method have a wider application range.
Description
Technical field
The present invention relates to blood pressure measurement technical field, particularly relate to based on optical pickocff Measure blood pressure technical field, specifically refer to a kind of blood pressure measuring system and the method that realize following the trail of continuously pressure value.
Background technology
In prior art, existing blood pressure measuring method has:
Sphygomanometer great majority conventional on market need to bind cuff, controlled the blood flow at upper arm artery or wrist radial artery place, carry out Measure blood pressure by auscultation (Korotkoff's Sound method) or oscillographic method (succusion) by cuff inflation/deflation.In addition, for the blood pressure measuring method of patent CN201410453076.X, be to determine blood pressure with hear sounds and pulse wave; For the blood pressure measuring method of patent CN201410537836.5, with ecg-r wave and pulse wave data, calculate same pulse wave and transfer to interval PTT between PPG characteristic point from ecg-r wave.By the relation between PTT and human body artery blood pressure, realize the measurement of human body artery blood pressure.Above method needs to gather at least two paths of signals simultaneously, needs the clock synchronization system of more complicated, needs to gather different signals simultaneously, adds additional the data acquisition amount of processing system.
Summary of the invention
The object of the invention is the shortcoming overcoming above-mentioned prior art, providing one can realize without the need to binding cuff, does not need the clock synchronization system of more complicated, only needs collection light intensity delta data can realize pressure value real-time tracing, measures rapidly and efficiently, has blood pressure measuring system and method that pressure value is followed the trail of in the realization of range of application widely continuously.
To achieve these goals, realization of the present invention follows the trail of the blood pressure measuring system of pressure value and method has following formation continuously:
The blood pressure measuring system of pressure value is followed the trail of in this realization continuously, and its main feature is, described system comprises:
Optical sensor module, in order to gather the light intensity delta data of human skin to human skin's utilizing emitted light;
Pulse wave signal generation module, obtains pulse wave signal in order to carry out process according to described light intensity delta data;
Pulse wave propagation time computing module, in order to extract pulse wave propagation time according to pulse wave characteristic point from described pulse wave signal;
Pressure value computing module, in order to calculate pressure value according to described pulse wave propagation time.
Preferably, described optical sensor module comprises one or more LED and photographic head or PD.
More preferably, the spectral region of described LED is 300nm ~ 1200nm, and described photographic head is the color sensor (ColorSensor) of colour imagery shot or employing and photographic head (Camera) principle of similitude.
Preferably, described optical pickocff is in order to also to gather the light intensity delta data of corresponding skin surface after tissue modulation to wrist, upper arm, cervical region or forehead skin surface utilizing emitted light.
The invention still further relates to a kind of blood pressure measuring method realizing following the trail of continuously pressure value based on described system, it is characterized in that, described method comprises the following steps:
(1) optical sensor module described in human skin's utilizing emitted light and gather human skin through tissue modulation after light intensity delta data;
(2) the pulse wave signal generation module described in carries out process according to described light intensity delta data and obtains pulse wave signal;
(3) the pulse wave propagation time computing module described in extracts pulse wave propagation time according to pulse wave characteristic point from described pulse wave signal;
(4) the pressure value computing module described in calculates pressure value according to described pulse wave propagation time.
Preferably, described optical sensor module comprises LED, photographic head and PD, described optical sensor module to human skin's utilizing emitted light and gather human skin through tissue modulation after light intensity delta data, comprise the following steps:
(1-1) LED described in is to human skin's utilizing emitted light;
(1-2) photographic head described in catches and gathers the light intensity delta data of human skin after tissue modulation.
Preferably, described optical sensor module to human skin's utilizing emitted light and gather human skin through tissue modulation after light intensity delta data, be specially:
Described optical sensor module also gathers the light intensity delta data of corresponding skin surface after tissue modulation to wrist, upper arm, cervical region or forehead skin surface utilizing emitted light.
The light intensity delta data of described collection human skin, comprises the following steps:
(1-a) optical sensor module gathers light intensity signal or obtains light intensity signal by image procossing after gathering picture signal;
(1-b) the light intensity variable signal data of human skin after tissue modulation are generated according to the time dependent signal sequence of light intensity signal.
Preferably, described pulse wave signal generation module carries out process according to described light intensity delta data and obtains pulse wave signal, is specially:
Described light intensity delta data after low pass or the process such as bandpass filtering or signal reconstruction, is obtained pulse wave signal by described pulse wave signal generation module.
Preferably, described pulse wave propagation time computing module extracts pulse wave propagation time according to pulse wave characteristic point from described pulse wave signal, is specially:
Described pulse wave propagation time computing module extracts time domain and (or) the frequency domain character of pulse wave through feature extracting method according to described pulse wave signal, in conjunction with frequency domain character, the time relationship between the temporal signatures point described in utilization calculates pulse wave propagation time.
Preferably, described pressure value computing module calculates pressure value according to described pulse wave propagation time, is specially:
Described pressure value computing module, based on Venus's lentor equation principle, utilizes the relation between pulse wave propagation time and blood pressure to calculate blood pressure.
Blood pressure measuring system and the method for pressure value are followed the trail of in the realization that have employed in this invention continuously, without the need to binding cuff, without the need to gathering ECG (Electrocardiograph, electrocardiogram) or other signals such as hear sounds, do not need the clock synchronization system of more complicated, only need to gather light intensity delta data and can realize pressure value real-time tracing, data acquisition amount is little, amount of calculation is little, measures rapidly and efficiently, has range of application widely.
Accompanying drawing explanation
Fig. 1 is the flow chart that the blood pressure measuring method of pressure value is followed the trail of in realization of the present invention continuously.
Detailed description of the invention
In order to more clearly describe technology contents of the present invention, conduct further description below in conjunction with specific embodiment.
The present invention can overcome the defect of prior art, provides a kind of method by optical measurement blood pressure.Cycle of heart beat promote blood flowing and blood vessel in the fullness degree change of blood, because human body different tissues is different to the absorption of light, the light intensity delta data that can be caused thus in skin surface perception by optical pickocff; Adopt the method for signal processing to process light intensity delta data, obtain pulse wave signal, utilize pulse wave feature point extraction pulse wave propagation time PTT (Pulsetransittime), calculate pressure value by the relation between PTT and blood pressure.
Described optical sensor module, includes but not limited to one or more LED, and the optical pickocff mould that photographic head and/or PD (photodiode, photodiode) form is fast.The spectral region of described LED includes but not limited to 300nm ~ 1200nm.Described photographic head preferentially adopts colour imagery shot, or the color sensor (ColorSensor) of employing and photographic head (Camera) principle of similitude.
Described skin surface site, includes but not limited to wrist, also can be upper arm, cervical region or forehead skin surface or other applicable positions measured.
Described PTT extracting method, according to the characteristic point of pulse wave itself, determines pulse wave propagation time.
The blood pressure measuring system of pressure value is followed the trail of in this realization continuously, and its main feature is, described system comprises:
Optical sensor module, in order to human skin's utilizing emitted light and gather human skin through tissue modulation after light intensity delta data;
Pulse wave signal generation module, obtains pulse wave signal in order to carry out process according to described light intensity delta data;
Pulse wave propagation time computing module, in order to extract pulse wave propagation time according to pulse wave characteristic point from described pulse wave signal;
Pressure value computing module, in order to calculate pressure value according to described pulse wave propagation time.
As shown in Figure 1, the blood pressure measuring method of pressure value is followed the trail of in realization of the present invention continuously, comprises the following steps:
(1) optical sensor module described in human skin's utilizing emitted light and gather human skin through tissue modulation after light intensity delta data;
(2) the pulse wave signal generation module described in carries out process according to described light intensity delta data and obtains pulse wave signal;
(3) the pulse wave propagation time computing module described in extracts pulse wave propagation time according to pulse wave characteristic point from described pulse wave signal;
(4) the pressure value computing module described in calculates pressure value according to described pulse wave propagation time.
In one preferably embodiment, described optical sensor module comprises LED, photographic head and/or PD, described optical sensor module to human skin's utilizing emitted light and gather human skin through tissue modulation after light intensity delta data, comprise the following steps:
(1-1) LED described in is to human skin's utilizing emitted light;
(1-2) photographic head described in catches the light intensity delta data gathering human skin.
In one preferably embodiment, described optical sensor module to human skin's utilizing emitted light and gather human skin through tissue modulation after light intensity delta data, be specially:
Described optical sensor module to wrist skin surface utilizing emitted light and gather wrist skin surface through tissue modulation after light intensity delta data.
The present invention only need gather pulse wave signal, only extracts the relation between the signal characteristic of pulse wave and blood pressure, just can Measure blood pressure.
The signal of described optical sensor module collection includes but not limited to picture signal and (or) light intensity signal, and described picture signal needs to be converted into light intensity signal by methods such as spatial domain average value processings; Wherein picture signal is better.
The time dependent signal sequence of described light intensity signal generates the light intensity variable signal data of human skin after tissue modulation;
Described light intensity delta data, after low pass or the process such as bandpass filtering or signal reconstruction, obtains pulse wave signal;
Described pulse wave signal extracts time domain and (or) the frequency domain character of pulse wave through feature extracting method, in conjunction with frequency domain character, time relationship between temporal signatures point described in utilization calculates PTT, based on Venus's lentor equation principle, the relation between PTT and blood pressure is utilized to calculate blood pressure;
Characteristic point in described temporal signatures includes but not limited to crest, trough in pulse waveform.
Blood pressure measuring system and the method for pressure value are followed the trail of in the realization that have employed in this invention continuously, without the need to binding cuff, without the need to gathering other signals such as ECG or hear sounds simultaneously, do not need the clock synchronization system of more complicated, only need to gather light intensity delta data and can realize pressure value real-time tracing, data acquisition amount is little, and amount of calculation is little, measure rapidly and efficiently, there is range of application widely.
In this description, the present invention is described with reference to its specific embodiment.But, still can make various amendment and conversion obviously and not deviate from the spirit and scope of the present invention.Therefore, description and accompanying drawing are regarded in an illustrative, rather than a restrictive.
Claims (11)
1. realize the blood pressure measuring system following the trail of pressure value continuously, it is characterized in that, described system comprises:
Optical sensor module, in order to human skin's utilizing emitted light and gather human skin through tissue modulation after light intensity delta data;
Pulse wave signal generation module, obtains pulse wave signal in order to carry out process according to described light intensity delta data;
Pulse wave propagation time computing module, in order to extract pulse wave propagation time according to pulse wave characteristic point from described pulse wave signal;
Pressure value computing module, in order to calculate pressure value according to described pulse wave propagation time.
2. the blood pressure measuring system of pressure value is followed the trail of in realization according to claim 1 continuously, it is characterized in that, described optical sensor module comprises one or more LED and photographic head or PD.
3. the blood pressure measuring system of pressure value is followed the trail of in realization according to claim 2 continuously, it is characterized in that, the spectral region of described LED is 300nm ~ 1200nm, and described photographic head is the color sensor of colour imagery shot or employing and the photographic head principle of similitude.
4. the blood pressure measuring system of pressure value is followed the trail of in realization according to claim 1 continuously, it is characterized in that, described optical pickocff is in order to also to gather the light intensity delta data of corresponding skin surface after tissue modulation to wrist, upper arm, cervical region or forehead skin surface utilizing emitted light.
5. realize based on system according to claim 1 the blood pressure measuring method following the trail of pressure value continuously, it is characterized in that, described method comprises the following steps:
(1) optical sensor module described in human skin's utilizing emitted light and gather human skin through tissue modulation after light intensity delta data;
(2) the pulse wave signal generation module described in carries out process according to described light intensity delta data and obtains pulse wave signal;
(3) the pulse wave propagation time computing module described in extracts pulse wave propagation time according to pulse wave characteristic point from described pulse wave signal;
(4) the pressure value computing module described in calculates pressure value according to described pulse wave propagation time.
6. the blood pressure measuring method of pressure value is followed the trail of in realization according to claim 5 continuously, it is characterized in that, described optical sensor module comprises LED and photographic head or PD, described optical sensor module to human skin's utilizing emitted light and gather human skin through tissue modulation after light intensity delta data, comprise the following steps:
(1-1) LED described in is to human skin's utilizing emitted light;
(1-2) photographic head described in or PD catch and gather the light intensity delta data of human skin after tissue modulation.
7. the blood pressure measuring method of pressure value is followed the trail of in realization according to claim 5 continuously, it is characterized in that, described optical sensor module to human skin's utilizing emitted light and gather human skin through tissue modulation after light intensity delta data, be specially:
Described optical sensor module also gathers the light intensity delta data of corresponding skin surface after tissue modulation to wrist, upper arm, cervical region or forehead skin surface utilizing emitted light.
8. the blood pressure measuring method of pressure value is followed the trail of in realization according to claim 5 continuously, it is characterized in that, the light intensity delta data of described collection human skin, comprises the following steps:
(1-a) optical sensor module gathers light intensity signal or obtains light intensity signal by image procossing after gathering picture signal;
(1-b) the light intensity variable signal data of human skin after tissue modulation are generated according to the time dependent signal sequence of light intensity signal.
9. the blood pressure measuring method of pressure value is followed the trail of in realization according to claim 5 continuously, it is characterized in that, described pulse wave signal generation module carries out process according to described light intensity delta data and obtains pulse wave signal, is specially:
Described light intensity delta data after low pass or bandpass filtering or signal reconstruction process, is obtained pulse wave signal by described pulse wave signal generation module.
10. the blood pressure measuring method of pressure value is followed the trail of in realization according to claim 5 continuously, it is characterized in that, described pulse wave propagation time computing module extracts pulse wave propagation time according to pulse wave characteristic point from described pulse wave signal, is specially:
Described pulse wave propagation time computing module extracts time domain and (or) the frequency domain character of pulse wave through feature extracting method according to described pulse wave signal, in conjunction with frequency domain character, the time relationship between the temporal signatures point described in utilization calculates pulse wave propagation time.
The blood pressure measuring method of pressure value is followed the trail of in 11. realizations according to claim 5 continuously, it is characterized in that, described pressure value computing module calculates pressure value according to described pulse wave propagation time, is specially:
Described pressure value computing module, based on Venus's lentor equation principle, utilizes the relation between pulse wave propagation time and blood pressure to calculate blood pressure.
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| CN109549639A (en) * | 2017-09-26 | 2019-04-02 | 郑昕 | A kind of pulse wave pressure and blood pressure measurement device and measurement method |
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Application publication date: 20151202 |