CN106361307A - Optical sensing-based wearable vital sign monitoring equipment and blood pressure detecting method - Google Patents
Optical sensing-based wearable vital sign monitoring equipment and blood pressure detecting method Download PDFInfo
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- CN106361307A CN106361307A CN201610878741.9A CN201610878741A CN106361307A CN 106361307 A CN106361307 A CN 106361307A CN 201610878741 A CN201610878741 A CN 201610878741A CN 106361307 A CN106361307 A CN 106361307A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
- A61B5/0205—Simultaneously evaluating both cardiovascular conditions and different types of body conditions, e.g. heart and respiratory condition
- A61B5/02055—Simultaneously evaluating both cardiovascular condition and temperature
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
- A61B5/021—Measuring pressure in heart or blood vessels
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
- A61B5/021—Measuring pressure in heart or blood vessels
- A61B5/02108—Measuring pressure in heart or blood vessels from analysis of pulse wave characteristics
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
- A61B5/021—Measuring pressure in heart or blood vessels
- A61B5/02141—Details of apparatus construction, e.g. pump units or housings therefor, cuff pressurising systems, arrangements of fluid conduits or circuits
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
- A61B5/024—Detecting, measuring or recording pulse rate or heart rate
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
- A61B5/6802—Sensor mounted on worn items
- A61B5/681—Wristwatch-type devices
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2560/00—Constructional details of operational features of apparatus; Accessories for medical measuring apparatus
- A61B2560/02—Operational features
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2560/00—Constructional details of operational features of apparatus; Accessories for medical measuring apparatus
- A61B2560/04—Constructional details of apparatus
- A61B2560/0431—Portable apparatus, e.g. comprising a handle or case
Abstract
The invention discloses optical sensing-based wearable vital sign monitoring equipment and a blood pressure detecting method. The equipment disclosed by the invention comprises a watch body shell, a power supply module, a voltage stabilizing module, a control module, a sensor module, mode switching buttons and a display module; the power supply module, the voltage stabilizing module, the control module and the sensor module are arranged in the shell; the mode switching buttons are arranged on the periphery of the shell; the display module is arranged on the upper surface of the shell; two windows and three light transmitting holes are formed in the lower surface of the watch body shell. According to the optical sensing-based wearable vital sign monitoring equipment and the blood pressure detecting method, a human body characteristic parameter K is set according to different peripheral resistance and arterial wall elasticity at the wrists of different persons at different times, and two correction factors, alpha and beta, are also set according to a general change rule of the blood pressure at different time periods, so that more accurate blood pressure parameters aiming at different individuals are calculated.
Description
Technical field
The invention belongs to healthy wearable device field, provide a kind of monitoring of the Wearable vital sign based on light sensing
Equipment and its blood pressure detecting method.
Background technology
The most representational several big vital sign parameters of human body, no outer is body temperature, heart rate, and blood pressure etc., effectively to these
Parameter carries out detection can be well as wearer reacts their physiological situation and then carries out early warning and adjustment.But, how just
A difficult problem sharp and that accurately blood pressure is measured with always healthy wearable device field.Must in traditional blood pressure measuring method
An indispensable ring is pulsometer, and then forms the ambulatory blood pressure test system being constituted around pulsometer.This kind of measurement side
The major defect one of method is the requirement having excessively " deliberately " to measurement process, and state when measuring is stable calmness mostly
, the data that now records bigger than normal relative to the peak value difference that blood pressure during human motion really can reach it is impossible to real accomplishing is pre-
Anti- early warning.Two is to also result in extremely uncomfortable Consumer's Experience to the extruding in succession at wrist or arm in test process.Three are
Complex in conjunction with the circuit design of pulsometer, volume is quite big, victory inconvenient to carry, high cost.Four is artificial when several
Between point measurement gained the information that reflects of data not comprehensive, count the epoch in big data instantly, ought to be to continuous monitoring institute
The data obtaining is analyzed just drawing the statement-of-health of optimum.In the Intelligent hardware trend of Fast marching, blood pressure measurement sets
Standby reformed AHP is extremely urgent.
Therefore, for drawbacks described above present in currently available technology, it is necessary in fact to be studied, provided herein is a kind of solve
Scheme, and then solve defect present in prior art.
Content of the invention
It is an object of the invention to being directed to the deficiencies in the prior art, provide a kind of novel attainable blood pressure measurement side
Case, fundamentally gives up the inconvenience caused by pulsometer and discomfort.Compare with legacy equipment, reduce the production cost of equipment,
Improve the aesthetic property of equipment, the exquisiteness of the integral device bringing under sacrificing the cost of certain duration of continuing a journey and resistance to falling property are significantly
Increase.
Light sensation of the present invention measures vital sign parameter equipment, including wrist-watch body housing, and the confession located at enclosure
Electric module, Voltage stabilizing module, control module, sensor assembly, located at the mode switching key of housing perimeter, located at upper surface of outer cover
Display module.
Described wrist-watch body housing lower surface has two windows, three loopholes；One of window is used for placing
Temperature sensor receiving terminal so as to contact skin, another iSCSI receiving end window and three loopholes with photosensitive located inside the shell
Module is corresponding, and another window is used for placing photosensitive receiving tube receiving terminal so as to receive reflected light, and three loopholes are used respectively
Transmission in three LED lamp light；
The design of light tight compartment is adopted between three LED lamps, four parts of photosensitive receiving tube, and between being mutually independent of each other each
Printing opacity and light-receiving.
Preferably, the position of three loopholes constitutes an equilateral triangle, for placing photosensitive receiving tube receiving terminal
Window is located at the center of this equilateral triangle.
Described supply module is used for powering to whole system, preferably selects Large Copacity and light TW two wire is chargeable
3.3v lithium battery.
Described mode switching key be used for switching on display module the clock rate that the up-to-date measurement of display obtains and
The working condition of photosensitive module, preserves each parameter simultaneously；Preferably select light compact SMD button.
Described display module measures each clock rate obtaining, including human body temperature, environment in real time for display system
Temperature, ventricular systolic pressure, diastolic pressure, heart rate, time；Preferably adopt oled liquid crystal display screen, this oled dot matrix screen small volume, display
Graphics rich, color is beautiful, fuller compared with general bar shaped led display content, has good vision appreciating, improves user
Experience.
Described sensor assembly includes thermal module, photosensitive module, and wherein thermal module is used for measuring external environment condition temperature
Degree and human body temperature parameter, are then sent to control module；The controlled module of photosensitive module controls and decides whether to light led
Lamp, after bright light, the light intensity of light intense irradiation human body skin back reflection is absorbed by the photosensitive receiving tube of photosensitive module, thus photosensitive
One magnitude of voltage is occurred on one output pin of module, this magnitude of voltage light reception intensity affects, and this magnitude of voltage will be sent to control simultaneously
Molding block；
After connecting with the mains, input level is 3.3v to described Voltage stabilizing module, through periphery simple circuit and voltage stabilizing
After chip, outfan exports the voltage signal that a level is 2.5v, and this signal is more stable as one using being sent to thermal module
Reference voltage, it is preferred to use new sot-223 encapsulation, this encapsulated type device is compared other and is had the following characteristics that body
Amass little, reduces cost, reduce power consumption；
Described control module is the core of circuit design, and it mainly completes the collection of data, storage, and calls meter
Calculate, the index request on hardware can have the ad passage on more than at least three tunnels, four idle io mouths are used as external control button,
Four idle io drive display module as extraneous, three idle io as the controlling switch of luminous LED lamp pipe, general control
As long as chip volume is up to specification just as the design chips of this project, but can consider follow-up development and application, preferably
Using model cc430f5137 master chip, the low-power consumption of 430 series of products is its outstanding feature, various park modes it
Between switching ensure that each point of electricity of saving system, increase its endurance, and its mini system be from Antenna Design
Circuit, supports Bluetooth wireless communication.
It is a further object to provide the blood pressure detecting method of said system, the method comprises the following steps:
Step (1), system open mode of operation, and control module controls the LED lamp of photosensitive module to light, and so that photosensitive module is sent out
Go out light intensity, agitate because target body blood vessel is not different degrees of in the same time, therefore photosensitive receiving tube receives the intensity of reflected light
Difference, so that output voltage values change with intensity variation.
Step (2), the ad pin of control module read coupled photosensitive module output voltage values in real time, thus in real time
Arrest and restore pulse wave curves, simultaneously by each moment pressure value p0T () data is stored；
Step (3), control module are sampled to above-mentioned pulse wave curves in real time, each in a pulse cycle by comparing
Moment blood pressure value data p0T (), obtains its maximin pso, pdo, pso, pdo can also be referred to as ventricular systolic pressure and
Diastolic pressure；
In step (4), a pulse cycle, add up each moment blood pressure value data p0T () is averaged and is calculated average arteries and veins
Galvanic electricity presses pm, sees formula (1),；Wherein pm is integrated after computing obtaining by single pulse wave, the po (t) in integral operation formula
Represent is the pressure value of t point in a pulse cycle, and to is a pulse wave cycle time, can pass through formula (2)
It is calculated.
To=60/ heart rate value formula (2)
Step (5), according to known average pulse voltage pm, ventricular systolic pressure pso, diastolic pressure pdo, by formula (3),
It is calculated characteristic ginseng value k；
K=(pm-pdo)/(pso-pdo) formula (3)
K value typically takes 0.3～0.35 in theory, if the k that actual motion is tried to achieve is near this scope, data reliability
High.
Step (6), according to pso, the pdo and to value obtaining in the data base obtaining after prior statistics, and step (5) obtains
The characteristic ginseng value k taking, by formula (4), (5), solves the α tables of data obtaining each time period, and α herein is regarded as a certain
The correction factor of moment characteristics of human body's parameter；Simultaneously according to formula (6), it is calculated the β tables of data of each time period, β herein
It is regarded as the correction factor of a certain moment characteristics of human body's parameter.In formula, sv is stroke volume.
Sv=α × psoFormula (5)
Pdo=pso β × k formula (6)
The data base obtaining after described prior statistics can by buy precision airlift pump method sphygomanometer record substantial amounts of
Blood pressure, heart rate data, thus built-up.
Step (7), relatively a series of above-mentioned α, β data, filter out the representative α of different time sections, and β value is as being
Number.Finally, in above-mentioned formula, α, β, k are substituted into, heart rate value is counter to be calculated pso, pdo.
It is contemplated that such as people takes food when selecting to above-mentioned representative α, β value, the survey that sleep produces to blood pressure
Amount impact, according to different time sections in a day 24 hours, from the α of corresponding time period, β tables of data calculates a theory respectively and puts down
Average, is pre-programmed in program in case software calls different α, β value according to current time by developer.
The blood pressure parameter recording in real time value pso, pdo is transmitted and is shown to display module by step (8), control module
Show.
Beneficial effects of the present invention are as follows:
(1) present system novel in structural design, breaks original bracelet strip conventional design, using little square display circle
Face, display content is fuller, focuses on Consumer's Experience, larger fuselage is that the sensing head being placed in below display interface is carried out more preferably
Ground closed processes.
(2) detection mode of this measuring system relies on light sensation to carry out budget estimation to pressure value, is that one kind no presses detection side
Formula.The loaded down with trivial details degree of measurement of blood pressure is a great problem of medical profession all the time, has before from invasive to noinvasive, will have pressure
Transformation to no pressure.
(3) during the realization of present system monitoring of blood pressure, the difference to light when being agitated in various degree using blood vessel
Refractive transmission rate, by algorithm process, calculates pressure value.
(4) always according to different people, the different Peripheral resistances at wrist and arterial wall elasticity do not set one to the present invention in the same time
Individual characteristics of human body's parameter k, and the general Changing Pattern according to different time sections blood pressure, also set two correction factors α, β,
And then calculate for the more accurate blood pressure parameter of Different Individual.
Brief description
Fig. 1 is a kind of structured flowchart of measuring system of the present invention.
Fig. 2 is a kind of schematic diagram of present invention measuring system main modular.
Fig. 3 is a kind of software flow pattern of new blood pressure algorithm of the present invention.
Fig. 4 is a kind of model machine schematic diagram of present invention bracelet detecting system.
In figure labelling: 1 is the window for placing temperature sensor receiving terminal, 2 is to receive for placing photosensitive receiving tube
The window at end, 3 is loophole.
Specific embodiment
Below with reference to accompanying drawing, the invention will be further described.
In order to overcome the defect of prior art, the present invention proposes a kind of Automatic survey degree height, and measurement data is accurate
Portable vital sign parameter monitoring system.Referring to Fig. 1, it is the structured flowchart of total system of the present invention, including wrist-watch, this is external
Shell, and the supply module located at enclosure, Voltage stabilizing module, control module, photosensitive module, thermal module, located at watch
The mode switching key of disk periphery, located at the display module of Watch dail plate upper surface.Wherein supply module is carried out using lithium battery
Power supply, oled screen is used for showing, Independent keys are used for switch mode.
As shown in figure 4, Watch dail plate lower surface has two windows, three loopholes；Wherein window 1 is used for placing temperature
, so as to contact skin, window 2 and three loopholes 3 are corresponding with the photosensitive module located inside the shell, window for sensor receiving terminal
2 are used for placing photosensitive receiving tube receiving terminal so as to receive reflected light, and three loopholes 3 are respectively used to the saturating of three LED lamp light
Penetrate；
The design of light tight compartment is adopted between three LED lamps, four parts of photosensitive receiving tube, and between being mutually independent of each other each
Printing opacity and light-receiving.
The position of three loopholes constitutes an equilateral triangle, and the window for placing photosensitive receiving tube receiving terminal is located at should
The center of equilateral triangle.
Referring to Fig. 2, it is that the wiring of present system connects the output of block diagram, wherein the sig1 output pin of thermal module and sig2
What foot represented respectively is ambient temperature response parameter and target body thermotonuses parameter, is all analog quantity, this two pins and
The two-way ad input of mcu is connected, by this two-way is captured with the algorithm process of data, for institute under real-time display current state
The ambient temperature of reflection and human body temperature.Because algorithm is affected by the physical distance between measurand and sensor, therefore surveying
Examination what a criterion distance fixed when using, bracelet slightly link closely wearer's wrist when, that is, with the thickness of bracelet lower housings be away from
From standard.
Photosensitive module can draw 4 connection jaws, wherein three road connection jaws redlight, redout, glight respectively with mcu
Three control feet be connected, controlled by mcu, respectively determine light or extinguish red light, infrared and green light.Multiple color light is provided
With infrared, select optimal test coloured light to provide condition for follow-up debugging efforts.This module is also integrated with an infrared receiving tube:
apds-9008；The optical information receiving can be converted to electric signal thus should by the 4th connection jaws signal by him
Analog output to mcu the 3rd road ad passage.Complete the crawl to pulse waveform herein, after delivering to master chip, a side
Face obtains heart rate value, on the other hand reduces waveform by algorithm, it is analyzed and processed, and feeds back blood pressure information.In practice process, send out
Now because of section bar reason, light transmittance has a strong impact on the capture to signal, therefore strictly carries out low transmissivity at this test module back and set
Meter.
Referring to Fig. 3, it is present system partial circuit diagram:
Described thermal module at least has the following characteristics that, to temperature change sensitivity height, data conversion is fast, real-time,
Under constant environment, data output is stable, and environment resistant temperature interference is strong.Therefore be necessary from can simultaneously feedback environment temperature and
The sensor of human body temperature parameter, according to varying environment temperature parameter thus being modified to human body temperature parameter, improving and calculating
The trustworthiness of data and anti-interference.Here selects opt-538u temperature sensor, and this sensor module circuitry includes the
Two chip u2, fourth chip u4, first resistor r1, the 5th resistance r5, the 6th resistance r6, the 7th resistance r7, the 8th resistance r8,
Nine resistance r9, the 11st resistance r11, the 5th electric capacity c5, the 8th electric capacity c8, the 9th electric capacity c9, the 13rd electric capacity c13, the 14th
Electric capacity c14, the 15th electric capacity c15, the 16th electric capacity c16, the 17th electric capacity c17；One termination mu balanced circuit of first resistor r1
The 2.5v voltage of output, one end of the other end and the 5th electric capacity c5, one end of the 9th electric capacity c9, the r pin of fourth chip u4 connect
Connect the p2.0 pin being followed by main control chip u3；The other end of the gnd pin of fourth chip u4 and the 9th electric capacity c9, the 5th electric capacity c5
The other end connect after be grounded；The v+ pin of fourth chip u4 is drawn with the in+ of one end of the 17th electric capacity c17, the second chip u2
Foot connects；The other end of the v- pin of fourth chip u4 and the 17th electric capacity c17, one end of the 6th resistance r6, the 8th resistance r8
One end, the 9th resistance r9 one end connect；The 2.5v voltage of another termination mu balanced circuit output of the 6th resistance r6, the 8th electricity
The other end of resistance r8 is connected with the in- pin of the second chip u2, one end of the 5th resistance r5, one end of the 13rd electric capacity c13；The
The other end of nine resistance r9 is connected with one end of the 11st resistance r11；The vout pin of the second chip u2 and the 5th resistance r5's
The other end, the other end of the 13rd resistance r13, one end of the 7th resistance r7, one end of the 15th electric capacity c15 connect；Second core
The vdd pin of piece u2 connects the 2.5v voltage of mu balanced circuit output；The vss pin ground connection of the second chip u2；11st resistance r11's
The other end of the other end and the 15th electric capacity c15, one end of the 14th electric capacity c14, one end of the 16th electric capacity c16, the 8th electricity
It is grounded after one end connection holding c8；The other end of the other end of the 7th resistance r7 and the 14th electric capacity c14, the 16th electric capacity c16
The other end, the other end of the 8th electric capacity c8 connects and is followed by the p2.1 pin of main control chip u3.Second chip u2 model
Mcp6001t-i, fourth chip u4 model otp-538u, model cc430f517 of main control chip u3.
The fast design requirement of described photosensitive mould can stable, accurately feed back the fluctuating signal waveform at wrist, and then right
This waveform carries out sampling processing, operational analysis, finally gives stably blood pressure parameter in real time.Should this require, this photosensitive module electricity
Road design includes fifth chip u5, the 11st resistance r11, the 12nd resistance r12, the 13rd resistance r13, the 14th resistance
R14, the 15th resistance r15, the 16th resistance r16, the 17th resistance r17, the 18th resistance r18, the 20th electric capacity c20,
21 electric capacity c21, the 22nd electric capacity c22, the 23rd electric capacity c23, the 24th electric capacity c24, the 25th electric capacity
C25, the 26th electric capacity c26, the 27th electric capacity c27, the first infrared receiving tube led1, the second light emitting diode led2,
Three light emitting diode led3, the 4th light emitting diode led4；One end of 11st resistance r11 and one end of the 12nd resistance r12,
The in- pin of fifth chip u5 connects, and the other end is connected with the vout pin of fifth chip u5 and is followed by the p2.2 of master chip u3 and draws
Foot；The other end of the 12nd resistance r12 is connected with one end of the 25th electric capacity c25, one end of the 26th electric capacity c26；The
The other end of 25 electric capacity c25 is connected with one end of the 24th electric capacity c24, one end of the 27th electric capacity c27；20th
The anode of the other end of four electric capacity c24 and the first infrared receiving tube pipe led1, the anode of the second light emitting diode led2, the 3rd
The anode of optical diode led3, the anode of the 4th light emitting diode led4, one end connection of the 14th resistance r14 are followed by mould of powering
+ 3.3v the voltage of block output；The other end of the other end of the 27th electric capacity c27 and the 14th resistance r14, the 15th resistance
The other end of r15 is grounded after connecting；One end of the other end of the 26th electric capacity c26 and the 15th resistance r15, the 16th resistance
One end of r16, the in+ pin of fifth chip u5 connect；+ the 3.3v of another termination supply module output of the 16th resistance r16
Voltage；The vss pin ground connection of fifth chip u5；The vdd pin of fifth chip connects the+3.3v voltage of supply module output；Second
One end of ten electric capacity c20 and one end of the 21st electric capacity c21, one end of the 22nd electric capacity c22, the 23rd electric capacity c23
One end connect be followed by supply module output+3.3v voltage；The other end of the 20th electric capacity c20 and the 18th resistance r18's
One end connects the p1.7 pin being followed by main control chip u3；The other end of the 21st electric capacity c21 and one end of the 17th resistance r17
Connect the p1.6 pin being followed by main control chip u3；The other end of the 22nd electric capacity c22 is connected with one end of the 13rd resistance r13
It is followed by the p1.5 pin of main control chip u3；The negative electrode of another termination the first infrared receiving tube led1 of the 23rd electric capacity c23；The
The negative electrode of another termination the second light emitting diode led2 of 13 resistance r13；Another termination the 3rd of the 17th resistance r17 lights
The negative electrode of diode led3；The negative electrode of another termination the 4th light emitting diode led4 of the 18th resistance r18.Wherein fifth chip
U5 model mcp6001t-i, model apds-9008 of the first infrared receiving tube pipe led1, the second light emitting diode led2's
Model am2520zgc09, model am2520zgc09 of the 3rd light emitting diode led3, the 4th light emitting diode led4's
Model am2520zgc09.
The implementation method of said system of the present invention comprises the steps:
Step (1), system open mode of operation, and control module controls the LED lamp of photosensitive module to light, and so that photosensitive module is sent out
Go out light intensity, agitate because target body blood vessel is not different degrees of in the same time, therefore photosensitive receiving tube receives the intensity of reflected light
Difference, so that output voltage values change with intensity variation.
Step (2), the ad pin of control module read coupled photosensitive module output voltage values in real time, thus in real time
Arrest and restore pulse wave curves, simultaneously by each moment pressure value p0T () data is stored；
Step (3), control module are sampled to above-mentioned pulse wave curves in real time, each in a pulse cycle by comparing
Moment blood pressure value data p0T (), obtains its maximin pso, pdo, pso, pdo can also be referred to as ventricular systolic pressure and
Diastolic pressure；
In step (4), a pulse cycle, add up each moment blood pressure value data p0T () is averaged and is calculated average arteries and veins
Galvanic electricity presses pm, sees formula (1),；Wherein pm is integrated after computing obtaining by single pulse wave, the po (t) in integral operation formula
Represent is the pressure value of t point in a pulse cycle, and to is a pulse wave cycle time, can pass through formula (2)
It is calculated.
To=60/ heart rate value formula (2)
Step (5), according to known average pulse voltage pm, ventricular systolic pressure pso, diastolic pressure pdo, by formula (3),
It is calculated characteristic ginseng value k；
K=(pm-pdo)/(pso-pdo) formula (3)
K value typically takes 0.3～0.35 in theory, if the k that actual motion is tried to achieve is near this scope, data reliability
High.
Step (6), according to pso, the pdo and to value obtaining in the data base obtaining after prior statistics, and step (5) obtains
The characteristic ginseng value k taking, by formula (4), (5), solves the α tables of data obtaining each time period, and α herein is regarded as a certain
The correction factor of moment characteristics of human body's parameter；Simultaneously according to formula (6), it is calculated the β tables of data of each time period, β herein
It is regarded as the correction factor of a certain moment characteristics of human body's parameter.In formula, sv is stroke volume.
Sv=α × psoFormula (5)
Pdo=pso β × k formula (6)
The data base obtaining after described prior statistics can by buy precision airlift pump method sphygomanometer record substantial amounts of
Blood pressure, heart rate data, thus built-up.
Step (7), relatively a series of above-mentioned α, β data, filter out the representative α of different time sections, and β value is as being
Number.Finally, in above-mentioned formula, α, β, k are substituted into, heart rate value is counter to be calculated pso, pdo.
It is contemplated that such as people takes food when selecting to above-mentioned representative α, β value, the survey that sleep produces to blood pressure
Amount impact, according to different time sections in a day 24 hours, from the α of corresponding time period, β tables of data calculates a theory respectively and puts down
Average, is pre-programmed in program in case software calls different α, β value according to current time by developer.
The blood pressure parameter recording in real time value pso, pdo is transmitted pedestrian property enterprising to display module by step (8), control module
Change display, call user's attention own health.
Note: 1. in above all expression formulas, pso, pdo can be converted directly into maximum in single pulse wave and
Minima enters row operation.But pso, pdo of being back-calculated to obtain are systolic pressure and diastolic pressure, not for maximin.
2. blood pressure is with minimum during midnight 0～3, at a low ebb, later be in rising trend, morning get up after rise rapidly, about
Reach the first peak value when 8～9；It is substantially at of a relatively high level daytime, the second peak value occurs when 17～18.Blood pressure from 18
Decline, night is in relatively low level.So the present invention can adopt 23:00～6:00,6:01 on time division is chosen
～10:30,10:31～1:30,1:31～17:00,17:01～19:00,19:01～22:59.
The explanation of above example is only intended to help and understands the method for the present invention and its core concept.It should be pointed out that it is right
For those skilled in the art, under the premise without departing from the principles of the invention, the present invention can also be carried out
Some improvement and modification, these improve and modify and also fall in the protection domain of the claims in the present invention.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses the present invention.
Multiple modifications to these embodiments will be apparent from for those skilled in the art, as defined herein
General Principle can be realized without departing from the spirit or scope of the present invention in other embodiments.Therefore, the present invention
It is not intended to be limited to the embodiments shown herein, and be to fit to and principles disclosed herein and features of novelty phase one
The scope the widest causing.
Claims (5)
1. the Wearable vital sign monitoring device based on light sensing is it is characterised in that include wrist-watch body housing, Yi Jishe
In the supply module of enclosure, Voltage stabilizing module, control module, sensor assembly, located at the mode switching key of housing perimeter,
Display module located at upper surface of outer cover；
Described wrist-watch body housing lower surface has two windows, three loopholes；One of window is used for placing temperature
, so as to contact skin, another window and three loopholes are corresponding with the photosensitive module located inside the shell for sensor receiving terminal,
Another window is used for placing photosensitive receiving tube receiving terminal so as to receive reflected light, and three loopholes are respectively used to three LED lamps
The transmission of light；
The design of light tight compartment is adopted between three LED lamps, four parts of photosensitive receiving tube, and the printing opacity between being mutually independent of each other each
With light-receiving.
2. the Wearable vital sign monitoring device based on light sensing as claimed in claim 1 is it is characterised in that three saturating
The position of unthreaded hole constitutes an equilateral triangle, and the window for placing photosensitive receiving tube receiving terminal is located at the center of this equilateral triangle
Position.
3. the Wearable vital sign monitoring device based on light sensing as claimed in claim 1 is it is characterised in that described
Supply module is rechargeable type lithium battery.
4. the Wearable vital sign monitoring device based on light sensing as claimed in claim 1 is it is characterised in that described
Mode switching key is for switching the work of the clock rate that the up-to-date measurement showing on display module obtains and photosensitive module
State, preserves each parameter simultaneously；
Described display module measures, for display system, each clock rate obtaining in real time, including human body temperature, ambient temperature,
Ventricular systolic pressure, diastolic pressure, heart rate, time；
Described sensor assembly includes thermal module, photosensitive module, wherein thermal module be used for measuring ambient temperature and
Human body temperature parameter, is then sent to control module；The controlled module of photosensitive module controls and decides whether to light LED lamp,
After bright light, the light intensity of light intense irradiation human body skin back reflection is absorbed by the photosensitive receiving tube of photosensitive module, thus in photosensitive mould
One magnitude of voltage is occurred on one output pin of block, this magnitude of voltage light reception intensity affects, and this magnitude of voltage will be sent to control simultaneously
Module；
Described control module has an ad passage on more than at least three tunnels, and four idle io mouths are used as external control button, four
Idle io drives display module as extraneous, and three idle io are as the controlling switch of luminous LED lamp pipe.
5. the blood pressure detecting side based on the Wearable vital sign monitoring device based on light sensing as claimed in claim 1
Method, the method comprises the following steps:
Step (1), system open mode of operation, and control module controls the LED lamp of photosensitive module to light, and makes photosensitive module send light
By force, agitate because target body blood vessel is not different degrees of in the same time, therefore the intensity that photosensitive receiving tube receives reflected light be different,
So that output voltage values change with intensity variation；
Step (2), the ad pin of control module read coupled photosensitive module output voltage values, in real time thus arresting in real time
Restore pulse wave curves, simultaneously by each moment pressure value p0T () data is stored；
Step (3), control module are sampled to above-mentioned pulse wave curves in real time, by comparing each moment in a pulse cycle
Blood pressure value data p0T (), obtains its maximin pso, pdo,；
In step (4), a pulse cycle, add up each moment blood pressure value data p0T () is averaged and is calculated average pulse voltage
Pm, is shown in formula (1)；Wherein po (t) represents the pressure value of t point in a pulse cycle, and to represents a pulse wave week
Time phase, can be calculated by formula (2)；
To=60/ heart rate value formula (2)
Step (5), according to known average pulse voltage pm, ventricular systolic pressure pso, diastolic pressure pdo, by formula (3), calculate
Obtain characteristic ginseng value k；
K=(pm-pdo)/(pso-pdo) formula (3)
Step (6), according to pso, the pdo and to value obtaining in the data base obtaining after prior statistics, and step (5) obtains
Characteristic ginseng value k, by formula (4), (5), solves the α tables of data obtaining each time period, α herein is regarded as a certain moment
The correction factor of characteristics of human body's parameter；Simultaneously according to formula (6), it is calculated the β tables of data of each time period, β herein can recognize
For being the correction factor of a certain moment characteristics of human body's parameter；In formula, sv is stroke volume；
Sv=α × psoFormula (5)
Pdo=pso β × k formula (6)
Step (7), relatively a series of above-mentioned α, β data, according to different time sections Changing Pattern in a day 24 hours, filter out not
With the α that the time period is representative, β value is as coefficient；In above-mentioned formula (4), (5), (6), substitute into α, β, k, heart rate value is anti-
It is calculated ventricular systolic pressure pso, the diastolic pressure pdo of different time sections；
The blood pressure parameter recording in real time value pso, pdo is transmitted and is shown to display module by step (8), control module.
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| CN105982654A (en) * | 2015-03-03 | 2016-10-05 | 东莞市美光达光学科技有限公司 | Optical sensing device for heart rate and blood pressure monitor |
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| CN105982654A (en) * | 2015-03-03 | 2016-10-05 | 东莞市美光达光学科技有限公司 | Optical sensing device for heart rate and blood pressure monitor |
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| CN110944577A (en) * | 2017-07-27 | 2020-03-31 | 长桑医疗（海南）有限公司 | Method and system for detecting blood oxygen saturation |
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| CN106361307B (en) | 2019-09-20 |
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