CN108937957A - Detection method, device and detection device - Google Patents
Detection method, device and detection device Download PDFInfo
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- CN108937957A CN108937957A CN201810570862.6A CN201810570862A CN108937957A CN 108937957 A CN108937957 A CN 108937957A CN 201810570862 A CN201810570862 A CN 201810570862A CN 108937957 A CN108937957 A CN 108937957A
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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
- A61B5/145—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue
- A61B5/1455—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue using optical sensors, e.g. spectral photometrical oximeters
- A61B5/14551—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue using optical sensors, e.g. spectral photometrical oximeters for measuring blood gases
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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
- A61B5/024—Detecting, measuring or recording pulse rate or heart rate
- A61B5/02416—Detecting, measuring or recording pulse rate or heart rate using photoplethysmograph signals, e.g. generated by infrared radiation
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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
- A61B5/024—Detecting, measuring or recording pulse rate or heart rate
- A61B5/02416—Detecting, measuring or recording pulse rate or heart rate using photoplethysmograph signals, e.g. generated by infrared radiation
- A61B5/02427—Details of sensor
- A61B5/02433—Details of sensor for infrared radiation
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Abstract
The embodiment of the invention provides a kind of detection method, device and detection devices, the detection device includes light source equipment, optical detector and acceleration transducer, this method comprises: obtaining multiple detection lights that optical detector is issued in light source equipment obtained photoplethysmographic signal after tested tissue；The heart rate detection wave for carrying interference signal is filtered using on the basis of acceleration signal；Dynamic Heart Rate value and reference signal are obtained according to heart rate detection wave；Effective section extraction is carried out to blood oxygen detection wave according to reference signal；Blood oxygen detection wave is carried out that rate value R is calculated using preset algorithm；Blood oxygen saturation is obtained according to rate value R.The detection scheme, by filtering out because of influence caused by moving the interference signal introduced to avoid moving testing result.And using heart rate detection wave be that benchmark signal carries out effective section extraction to blood oxygen detection wave, avoid detecting due to blood oxygen wave because anti-interference ability it is weaker caused by the adverse effect of testing result the drawbacks of.
Description
Technical field
The present invention relates to detection technique fields, in particular to a kind of detection method, device and detection device.
Background technique
Blood oxygen saturation is to measure the important parameter of blood of human body oxygen carrying capacity, and blood oxygen saturation detection can quickly, directly
Connect, effectively react people physical condition.Heart rate and blood oxygen also include physiological and pathological related with angiocarpy abundant simultaneously
Information helps to diagnose the illness.Application and development, wearable device with development of Mobile Internet technology in medical treatment & health field
Can the physiological parameters such as heart rate, blood oxygen to user monitored in real time, being capable of early diagnosis for disease, chronic disease patient
Domestic monitoring help is provided, to play a role in realization " low cost of fitness-for-all ".
There is smartwatch, Intelligent bracelet, the intelligent spire lamella largely to come in every shape in the market, still, current is wearable
Equipment can only monitor Dynamic Heart Rate mostly, therefore, dynamic blood oxygen be obtained while obtaining Dynamic Heart Rate with biggish market
Demand.But in the prior art, its anti-interference energy of wavelength commonly used by the reflective oxygen saturation monitor suitable for wearable device
Power is weaker, and the influence of the interference signal vulnerable to introducings such as movement and Changes in weather is not easy to detect accurate blood oxygen saturation.Cause
This, how to realize a kind of can eliminate this noise like and can be urgently to be resolved with the detection scheme in conjunction with Dynamic Heart Rate measurement.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of detection method, device and detection devices to improve above-mentioned ask
Topic.
Presently preferred embodiments of the present invention provides a kind of detection method, is applied to detection device, the detection device includes light
Source device, optical detector and acceleration transducer, which comprises
Obtain the tested group of detection light process for multiple and different wavelength that the optical detector is issued in the light source equipment
Rear obtained photoplethysmographic signal is knitted, the photoplethysmographic signal includes heart rate detection wave and blood oxygen detection
Wave；
Using on the basis of the collected acceleration signal of the acceleration transducer of acquisition to carry because movement introduce
The heart rate detection wave of interference signal be filtered to obtain the heart rate detection wave after filtering interference signals；
Dynamic Heart Rate value and reference signal is calculated according to the heart rate detection wave after filtering processing；
Effective section extraction is carried out to blood oxygen detection wave according to the reference signal；
The blood oxygen detection wave extracted is calculated to obtain blood oxygen relevant parameter using preset algorithm, and according to described
Rate value R is calculated in blood oxygen relevant parameter；
Blood oxygen saturation is calculated according to the rate value R, and exports the blood oxygen saturation and the dynamic heart
Rate value.
Optionally, Dynamic Heart Rate value and reference signal is calculated in the heart rate detection wave according to after filtering processing
Step, comprising:
Time Domain Processing and frequency domain processing are carried out to the heart rate detection wave after filtering processing, to respectively obtain at time domain
Heart rate value and frequency domain after reason treated heart rate value；
In conjunction with the last moment at current time heart rate value and Time Domain Processing after heart rate value and frequency domain treated the heart
Simultaneously the heart rate value at current time is calculated to obtain Dynamic Heart Rate value using Kalman filtering algorithm in rate value；
Reference signal is obtained according to the heart rate detection wave after filtering processing.
Optionally, the reference signal includes multi-segment signal, and the heart rate detection wave according to after filtering processing calculates
After the step of to Dynamic Heart Rate value and reference signal, the method also includes detecting whether the reference signal reaches default
It is required that the step of, which includes:
For each segment signal in the reference signal, two extreme points of the segment signal are obtained；
The interval sampling points between described two extreme points are obtained, and whether detect the interval sampling points in pre-
If heart rate range, if being in preset heart rate range, then determine maximum value of the segment signal in single pulse cycle and most
Small value；
Detect whether the situation of change between the maximum value and minimum value meets preset heartbeat rule, if full
Foot, then determine that the reference signal reaches preset requirement.
Optionally, blood oxygen detection wave includes two kinds, it is described using preset algorithm to the blood oxygen extracted detect wave into
Row is calculated to obtain blood oxygen relevant parameter, and the step of rate value R is calculated according to the blood oxygen relevant parameter, comprising:
The incident intensity and penetration range of the blood oxygen detection wave are obtained, and is calculated extracts as follows
Blood oxygen detection wave corresponding waveform during single pulse minimum value RL/IRLWith maximum value RH/IRH:
According to the minimum value RL/IRLWith maximum value RH/IRHAnd rate value R is calculated as follows:
Wherein, RL/IRLThe minimum value of wave corresponding waveform during single pulse, R are detected for blood oxygenH/IRHFor blood oxygen inspection
Survey the maximum value of wave corresponding waveform during single pulse, IoFor incident intensity, α is tested tissue absorptance, λR/λIRTable
Show absorptivity, αAIndicate arterial blood absorptance, d indicates that penetration range, Δ d indicate to change caused by heart contraction and diastole
Amount.
Optionally, described that the blood oxygen detection wave extracted is calculated to obtain blood oxygen correlation ginseng using preset algorithm
Number, and the step of rate value R is calculated according to the blood oxygen relevant parameter, comprising:
For each adjacent two sampled point in the corresponding waveform of blood oxygen detection wave extracted, two sampled points pair are calculated
The difference for the of ac that the optical detector answered is exported, by the difference respectively DC quantity corresponding with each sampled point into
Row is compared to obtain ratio, and by obtain two ratios mutually divided by obtaining single rate value；
The blood oxygen extracted is detected into the corresponding single rate value of two neighboring sampled point all in wave and carries out mean value meter
It calculates to obtain rate value R.
Optionally, before described the step of carrying out the extraction of effective section to blood oxygen detection wave according to the reference signal,
The method also includes:
Signal quality assessment value is obtained according to the acceleration signal and the Dynamic Heart Rate value；
Detect whether the Signal quality assessment value meets default assessment requirement, if meeting the default assessment requirement,
Execute the described the step of extraction of effective section is carried out to blood oxygen detection wave according to the reference signal.
Optionally, after described the step of carrying out the extraction of effective section to blood oxygen detection wave according to the reference signal,
The method also includes:
The blood oxygen detection wave extracted is adaptively filtered based on the reference signal and using adaptive filter algorithm
Wave processing.
Optionally, the corresponding detection light of the heart rate detection wave is green light, and the blood oxygen detects the corresponding detection light packet of wave
Include feux rouges and infrared light.
The embodiment of the present application also provides a kind of detection device, is applied to detection device, the detection device includes that light source is set
Standby, optical detector and acceleration transducer, the detection device include:
Signal acquisition module, the multiple and different wavelength issued in the light source equipment for obtaining the optical detector
Detection light obtained photoplethysmographic signal after tested tissue, the photoplethysmographic signal include heart rate
It detects wave and blood oxygen detects wave；
Module is filtered, for right on the basis of the collected acceleration signal of the acceleration transducer using acquisition
The heart rate detection wave for carrying the interference signal introduced by movement is filtered to obtain the heart rate after filtering interference signals
Detect wave；
First computing module, for Dynamic Heart Rate value and benchmark to be calculated according to the heart rate detection wave after filtering processing
Signal；
Extraction module, for carrying out effective section extraction to blood oxygen detection wave according to the reference signal；
Second computing module, for being calculated the blood oxygen detection wave extracted to obtain blood oxygen phase using preset algorithm
Parameter is closed, and rate value R is calculated according to the blood oxygen relevant parameter；
Third computing module for blood oxygen saturation to be calculated according to the rate value R, and exports the blood oxygen saturation
Degree and the Dynamic Heart Rate value.
The embodiment of the present application also provides a kind of detection device, comprising:
Light source equipment；
Optical detector；
Acceleration transducer；
Memory；
Processor；And
Detection device, the software function for being stored in the memory and being executed by the processor including one or more
Module, the detection device include:
Signal acquisition module, the multiple and different wavelength issued in the light source equipment for obtaining the optical detector
Detection light obtained photoplethysmographic signal after tested tissue, the photoplethysmographic signal include heart rate
Detect wave and blood oxygen detection；
Module is filtered, for right on the basis of the collected acceleration signal of the acceleration transducer using acquisition
The heart rate detection wave for carrying the interference signal introduced by movement is filtered to obtain the heart rate after filtering interference signals
Detect wave；
First computing module, for Dynamic Heart Rate value and benchmark to be calculated according to the heart rate detection wave after filtering processing
Signal；
Extraction module, for carrying out effective section extraction to blood oxygen detection wave according to the reference signal；
Second computing module, for being calculated the blood oxygen detection wave extracted to obtain blood oxygen phase using preset algorithm
Parameter is closed, and rate value R is calculated according to the blood oxygen relevant parameter；
Third computing module for blood oxygen saturation to be calculated according to the rate value R, and exports the blood oxygen saturation
Degree and the Dynamic Heart Rate value.
Detection method, device and detection device provided by the embodiments of the present application, on the basis of the acceleration signal of acquisition
The heart rate detection wave of acquisition is filtered to filter out the interference signal that movement introduces, and Dynamic Heart Rate value and benchmark is calculated
Signal.Effective section extraction is carried out with blood oxygen detection wave of the reference signal to acquisition, and using preset algorithm to the blood extracted
Oxygen detection wave is calculated to obtain rate value R, blood oxygen saturation is calculated according to rate value R, and export obtained dynamic
Heart rate value and blood oxygen saturation.The detection scheme is filtered heart rate detection wave using on the basis of the acceleration signal of acquisition
To avoid the interference signal introduced by movement influencing caused by testing result.Also, utilize what is obtained according to heart rate detection wave
Reference signal carries out effective section extraction to blood oxygen detection wave, using the blood oxygen detection wave extracted blood oxygen saturation is calculated
Degree.Avoid detecting due to blood oxygen wave because anti-interference ability it is weaker caused by the adverse effect of testing result the drawbacks of.
To enable the above objects, features and advantages of the present invention to be clearer and more comprehensible, preferred embodiment is cited below particularly, and cooperate
Appended attached drawing, is described in detail below.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the schematic block diagram of detection device provided in an embodiment of the present invention.
Fig. 2 is the frame structure schematic diagram of microcontroller provided in an embodiment of the present invention.
Fig. 3 is the flow chart of detection method provided in an embodiment of the present invention.
Fig. 4 is the flow chart of the sub-step of step S130 in Fig. 3.
Fig. 5 is the flow chart of the sub-step of step S133 in Fig. 4.
Fig. 6 is cardiac pulse periodic evolvement waveforms schematic diagram provided in an embodiment of the present invention.
Fig. 7 is the functional block diagram for the detection device that inventive embodiments provide.
Icon: 10- detection device；100- microcontroller；110- detection device；111- signal acquisition module；112- filtering
Processing module；The first computing module of 113-；114- extraction module；The second computing module of 115-；116- third computing module；120-
Memory；130- storage control；140- processor；200- light source equipment；300- optical detector；400- acceleration transducer.
Specific embodiment
Below in conjunction with attached drawing in the embodiment of the present invention, technical solution in the embodiment of the present invention carries out clear, complete
Ground description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Usually exist
The component of the embodiment of the present invention described and illustrated in attached drawing can be arranged and be designed with a variety of different configurations herein.Cause
This, is not intended to limit claimed invention to the detailed description of the embodiment of the present invention provided in the accompanying drawings below
Range, but it is merely representative of selected embodiment of the invention.Based on the embodiment of the present invention, those skilled in the art are not doing
Every other embodiment obtained under the premise of creative work out, shall fall within the protection scope of the present invention.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.Meanwhile of the invention
In description unless specifically defined or limited otherwise, term " installation ", " setting ", " connection " shall be understood in a broad sense, for example, can
To be to be fixedly connected, may be a detachable connection, or be integrally connected；It can be mechanical connection, be also possible to be electrically connected；It can
To be to be connected directly, the connection inside two elements can also be can be indirectly connected through an intermediary.For this field
For those of ordinary skill, the concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.
As shown in Figure 1, being the schematic block diagram of detection device 10 provided in an embodiment of the present invention, the detection device
10 include microcontroller 100, light source equipment 200, optical detector 300 and acceleration transducer 400.Wherein, the light source is set
Standby 200, optical detector 300 and acceleration transducer 400 are connect with the microcontroller 100 respectively.The light source equipment 200,
Optical detector 300 and acceleration transducer 400 are arranged on detection device 10.The capable of emitting a variety of differences of light source equipment 200
Detection wave, such as green light, feux rouges or infrared light of wavelength etc..The optical detector 300 can acquire the light source equipment 200
The detection light issued is in photoplethysmographic signal obtained after tissue, and by collected photoelectricity volume
Pulse wave signal is sent to microcontroller 100.The acceleration transducer 400 can accelerate for 3-axis acceleration sensor or six axis
Sensor is spent, may be respectively used in the acceleration value of capture and detection apparatus 10 in different directions.The acceleration transducer 400 will
Collected acceleration signal is sent to microcontroller 100.The microcontroller 100 can divide the above-mentioned data received
Analysis, processing etc., to determine the heart rate and blood oxygen saturation of the user for wearing the detection device 10.Wherein, the detection device
10 may be, but not limited to, smartwatch, Intelligent bracelet, intelligent spire lamella etc..
Referring to Fig. 2, being the frame structure schematic diagram of microcontroller 100 provided in this embodiment, the microcontroller 100 packet
Include detection device 110, memory 120, storage control 130 and processor 140.Wherein, the memory 120, storage control
Each element of device 130 and processor 140 processed is directly or indirectly electrically connected between each other, to realize the transmission or interaction of data.
It is electrically connected for example, being realized between these elements by one or more communication bus or signal wire.The detection device 110 is wrapped
Include at least one operation system that can be stored in the storage or be solidificated in the microcontroller 100 in the form of software or firmware
Software function module in system.The processor 140 accesses the memory 120 under the control of the storage control 130,
For executing the executable module stored in the memory 120, such as software function included by the detection device 110
Module and computer program etc., and then realize the detection method in the embodiment of the present invention.Optionally, the microcontroller 100 can
To be but not limited to i7 6700k microprocessor 140 etc..It should be appreciated that structure shown in Fig. 2 is only to illustrate.The microcontroller
100 can have than shown in Fig. 2 more perhaps less component or with the configuration different from shown in Fig. 2.Wherein, Fig. 2 institute
Each component shown can be realized by software, hardware or a combination thereof.
Based on the description and design to above-mentioned detection device 10, as shown in figure 3, being applied to be provided in an embodiment of the present invention
The flow diagram of the detection method of microcontroller 100 in the detection device 10, below in conjunction with Fig. 3 to the detection side
The detailed process and step of method are described in detail.It should be noted here that each step of the detection method provided in the present embodiment is not
It is limitation with Fig. 3 or following step, can be adjusted flexibly according to the actual situation.
Step S110 obtains the inspection for multiple and different wavelength that the optical detector 300 is issued in the light source equipment 200
Light obtained photoplethysmographic signal after tested tissue is surveyed, the photoplethysmographic signal includes heart rate inspection
It surveys wave and blood oxygen detects wave.
When detecting using heart rate and blood oxygen of the detection device 10 to user, difference is issued using light source equipment 200
The detection light of wavelength, the arterial blood and tissue of human body can have certain absorption to light, and absorption meets langbobier law, i.e.,
Substance is to there are relationships between the power of a certain wavelength light absorption and the concentration and its liquid layer thickness of extinction material.Therefore photoelectricity is utilized
Signal detected by detector and arteries have certain relationship, carry out heart rate and oximeter using obtained signal
It calculates.
In the detection light of a variety of different wave lengths, wherein green wavelength 500-560nm, absorption coefficient with higher,
Therefore green light is in the photoplethysmographic signal with higher magnitude available after tested tissue.In comparison, mesh
Before can be used for calculating the detection light of blood oxygen saturation its wavelength and be all larger than equal to 640nm, such wavelength absorption coefficient is significantly less than
Green light, the detection light of such wavelength is in its amplitude of photoplethysmographic signal obtained after tested tissue much smaller than green
The amplitude of the obtained photoplethysmographic signal of light.Therefore, in the present embodiment, using green light as the detection of heart rate detection
Light, and using green optical signal compared with its stronger feature of the detection optical signal of wave band of measurement blood oxygen, it is right on the basis of green optical signal
Blood oxygen detection detection signal handled, to avoid the detection signal detected for blood oxygen vulnerable to interference the drawbacks of.
In the present embodiment, made using green light as the detection light of heart rate detection with the detection light of at least two different wave lengths
Detection light for blood oxygen detection optionally in the present embodiment, is said so that blood oxygen detection light includes infrared light and feux rouges as an example
It is bright.
In the present embodiment, the microcontroller 100 can control the detection light of the sending of light source equipment 200 different wave length,
Each detection light after tested tissue, is being acquired by photodetector and is obtaining the letter of the photoplethysmographic under different wave length
Number.For the processing of follow-up signal, in the present embodiment, reach pre- in the duration of obtained photoplethysmographic signal
If duration, such as 1 minute, then the signal in this section of duration can be handled.
Step S120, using on the basis of the collected acceleration signal of the acceleration transducer 400 of acquisition to carrying
There is the heart rate detection wave of the interference signal introduced by movement to be filtered to obtain the heart rate detection after filtering interference signals
Wave.
When it is implemented, the user for wearing the detection device 10 can not be constantly in stationary state, therefore, photoelectricity is visited
Survey the interference signal for carrying in device photoplethysmographic signal collected and introducing by user movement.The interference signal will be right
Measurement result generates adverse effect, therefore need to filter out the interference signal from photoplethysmographic signal.Wherein, the photoelectricity
Volume pulsation wave signal includes that heart rate detection involves blood oxygen detection wave.
In this implementation, the acceleration signal that the acceleration transducer 400 can will test is sent to the microcontroller
100.Wherein, there are certain relationships for the interference signal carried in the acceleration signal and heart rate detection wave, therefore, can the acceleration
The heart rate detection wave for carrying the interference signal is filtered on the basis of degree signal.
Optionally, the denoising audio technology that singular value decomposition can be used in the present embodiment is filtered the heart rate detection wave
Processing is to obtain the heart rate detection wave after filtering interference signals.
Dynamic Heart Rate value and reference signal is calculated according to the heart rate detection wave after filtering processing in step S130.
Optionally, referring to Fig. 4, in the present embodiment, step S130 may include step S131, step S132 and step
Tri- sub-steps of rapid S133.
Step S131 carries out Time Domain Processing to the heart rate detection wave after filtering processing and frequency domain is handled, with respectively
Heart rate value and frequency domain after obtaining Time Domain Processing treated heart rate value.
Step S132, in conjunction with the last moment at current time heart rate value and Time Domain Processing after heart rate value and frequency domain
Simultaneously the heart rate value at current time is calculated to obtain Dynamic Heart Rate value using Kalman filtering algorithm in treated heart rate value.
Step S133 obtains reference signal according to the heart rate detection wave after filtering processing.
It in the present embodiment, therefore, can be to the heart rate detection wave after filtering processing in order to guarantee the robustness of data
Carry out Time Domain Processing and frequency domain processing.The detection cycle includes multiple pulse cycles, when carrying out to the heart rate detection wave
When domain is handled, the heart rate detection wave signal in each pulse cycle can get, and to the heart rate detection wave in multiple pulse cycles
Signal carries out mean value and seeks to obtain the heart rate detection wave mean value in the detection cycle.In addition, to the heart rate detection wave into
When line frequency domain is handled, it can be directed to each pulse cycle, obtain the heart rate detection wave signal of each sampled point in the pulse cycle, with
The frequency of occurrence of the heart rate detection wave signal in identical numerical value is obtained, further to obtain heart rate detection wave in the detection cycle
Numeric distribution situation.Optionally, corresponding data graphs can be obtained according to the numeric distribution situation, and obtains data histogram
Peak-data, median numbers in figure accordingly and centre data etc., to reflect heart rate detection wave letter of the user within one period
Number strength range distribution.
In the present embodiment, it can get heart rate value obtained after above-mentioned Time Domain Processing and handled by above-mentioned frequency domain
Obtained heart rate value afterwards.Optionally, in conjunction with the heart rate value after the heart rate value and Time Domain Processing of the last moment at current time
The heart rate value at current time is calculated with frequency domain treated heart rate value and using Kalman filtering algorithm, can so be moved
State heart rate value.
In addition, in the present embodiment, also reference signal can be obtained according to the heart rate detection wave obtained after filtering processing, so
It is subsequent to be split and handle to detect wave to blood oxygen using the reference signal.
In the present embodiment, before carrying out the step of effective section is extracted to blood oxygen detection wave according to the reference signal, also
Signal quality assessment value can be obtained according to the acceleration signal and the Dynamic Heart Rate value, such as detect the acceleration signal
Numberical range to obtain corresponding level of disruption, and can be obtained according to the fluctuation situation for the heart rate that Dynamic Heart Rate value embodies
Corresponding degree of fluctuation.Amid all these factors and the transformation rule that prestores obtains corresponding Signal quality assessment value.Further
Ground, whether the Signal quality assessment value detected, which meets default assessment, requires, and can continue to hold if meeting default assessment and requiring
Row follow-up process.
It optionally, further include inspection after obtaining reference signal according to the heart rate detection wave after filtering processing in the present embodiment
The step of whether reference signal reaches preset requirement is surveyed, referring to Fig. 5, the step can be realized by following procedure:
Step S1331 obtains two extreme points of the segment signal for each segment signal in the reference signal.
Step S1332 obtains the interval sampling points between described two extreme points, and detects the interval sampling points
Whether it is in preset heart rate range, if being in preset heart rate range, executes following steps S1333.
Step S1333 determines maximum value and minimum value of the segment signal within the single sampling period, detects the maximum value
Whether the situation of change between minimum value meets preset heartbeat rule, if satisfied, then executing following steps S1334.
Step S1334 determines that the reference signal reaches preset requirement.
It can be seen from the above, in detection cycle include multiple sampling periods to get to reference signal include multi-segment signal,
Each segment signal corresponding sampling period.And each sampling period may include multiple pulse cycles.Reference signal can be directed to
In each segment signal, obtain two extreme points of the segment signal.Meet if the interval sampling between two extreme points is counted
Default heart rate range, it is determined that go out maximum value and minimum value of the segment signal in single pulse cycle, and detect the maximum value
Whether the situation of change between minimum value meets preset heartbeat rule.Wherein, Fig. 6 is shown in single pulse cycle
Heartbeat rule change, wherein rising stage AB section is ventricle phase of maximum ejection, and it is that ventricle slowly penetrates blood that the decline phase, which is BF sections,
Phase, blood backflow.According to heartbeat rule, rising stage AB section and decline phase BF are because meeting certain proportionate relationship, and often
Maximum rate of change between two adjacent waves is no more than 40%, and the maximum rate of change of ascending branch time is no more than 30%.In this way, can
Whether preset requirement is reached with determinating reference signal according to above-mentioned heartbeat rule.
Step S140 carries out effective section extraction to blood oxygen detection wave according to the reference signal.
In the present embodiment, effective section extraction is carried out to blood oxygen detection wave based on the reference signal, for example, can mention
Take out the signal segment for being in same time period in blood oxygen detection wave with the reference signal.In addition, can also be believed based on the benchmark
Number and using adaptive filter algorithm to extract blood oxygen detection wave carry out adaptive-filtering processing.
Step S150 calculates to obtain blood oxygen relevant parameter the blood oxygen detection wave extracted using preset algorithm,
And rate value R is calculated according to the blood oxygen relevant parameter.
Blood oxygen saturation usually needs first calculating ratio value R in calculating, and calculates blood oxygen saturation further according to rate value R.Cause
The key that this blood oxygen saturation calculates is the calculating of rate value R.Blood oxygen detection in the present embodiment, after being filtered
After wave, it is handled using preset algorithm to obtain rate value R.The preset algorithm can be peak-to-peak value method, the differential method
Or linear regression method etc..
It is following to be carried out using peak peak method and the differential method to the blood oxygen detection wave for including infrared light and feux rouges in the present embodiment
The calculating process of rate value R is illustrated.It should be noted that preset algorithm described herein is not limited to peak peak method and differential
Method, and the corresponding detection light of blood oxygen detection wave is also not necessarily limited to infrared light and feux rouges, as long as meeting two kinds and two or more
Detection light.
In the present embodiment, it when carrying out the calculating of rate value R using peak peak method, can be realized by following steps:
The incident intensity and penetration range of the blood oxygen detection wave are obtained, and is calculated extracts as follows
Blood oxygen detection wave corresponding waveform during single pulse minimum value RL/IRLWith maximum value RH/IRH.Wherein, RLFor feux rouges
Minimum value, RHFor feux rouges maximum value, IRLFor infrared light minimum value, IRHFor infrared light maximum value.
According to the minimum value RL/IRLWith maximum value RH/IRHAnd rate value R is calculated as follows:
Wherein, IoFor incident intensity, α is tested tissue absorptance, λR/λIRIndicate absorptivity, αAIndicate that arterial blood is inhaled
Light rate, d indicate that penetration range, Δ d indicate variable quantity caused by heart contraction and diastole.
In addition, can be realized by following steps when carrying out the calculating of rate value R using the differential method:
For each adjacent two sampled point in the corresponding waveform of blood oxygen detection wave extracted, two sampled points pair are calculated
The difference for the of ac that the optical detector 300 answered is exported, by difference direct current corresponding with each sampled point respectively
Amount compare to obtain ratio, and by obtain two ratios phases divided by obtaining single rate value.
The blood oxygen extracted is detected into the corresponding single rate value of two neighboring sampled point all in wave and carries out mean value meter
It calculates to obtain rate value R.
Step S160 is calculated blood oxygen saturation according to the rate value R, and exports the blood oxygen saturation and institute
State Dynamic Heart Rate value.
In the present embodiment, it after rate value R is calculated by the above process, can be calculated by the following formula to obtain
Blood oxygen saturation:
Wherein, SPO2For blood oxygen saturation,WithOxyhemoglobin respectively in tested tissue is to red
The absorption coefficient of light and infrared light,WithReduced hemoglobin respectively in tested tissue is to feux rouges and infrared light
Absorption coefficient.
After oxygen saturation and Dynamic Heart Rate value is calculated, display screen that is exportable and being shown in the detection device 10
On.
Referring to Fig. 7, the detection device 110 applied to above-mentioned detection device 10 provided for invention another preferred embodiment
Functional block diagram.The detection device 110 includes signal acquisition module 111, the filtering processing calculating mould of module 112, first
Block 113, extraction module 114, the second computing module 115 and third computing module 116.
The signal acquisition module 111 for obtain the optical detector 300 issued in the light source equipment 200 it is more
The detection light of a different wave length obtained photoplethysmographic signal after tested tissue, the photoplethysmographic
Signal includes heart rate detection wave and blood oxygen detection wave.The signal acquisition module 111 can be used for executing step shown in Fig. 3
S110, specific operating method can refer to the detailed description of step S110.
The filtering processing module 112 is used to believe using the collected acceleration of the acceleration transducer 400 obtained
The heart rate detection wave for carrying the interference signal introduced by movement is filtered on the basis of number to obtain filtering out interference letter
Heart rate detection wave after number.The filtering processing module 112 can be used for executing step S120 shown in Fig. 3, specific to operate
Method can refer to the detailed description of step S120.
First computing module 113 be used for according to the heart rate detection wave after filtering processing be calculated Dynamic Heart Rate value with
And reference signal.First computing module 113 can be used for executing step S130 shown in Fig. 3, and specific operating method can
With reference to the detailed description of step S130.
The extraction module 114 is used to carry out effective section extraction to blood oxygen detection wave according to the reference signal.Institute
Stating extraction module 114 can be used for executing step S140 shown in Fig. 3, and specific operating method can refer to the detailed of step S140
Description.
Second computing module 115 is used to calculate to obtain the blood oxygen detection wave extracted using preset algorithm
Blood oxygen relevant parameter, and rate value R is calculated according to the blood oxygen relevant parameter.Second computing module 115 can be used for
Step S150 shown in Fig. 3 is executed, specific operating method can refer to the detailed description of step S150.
The third computing module 116 is used to that blood oxygen saturation to be calculated according to the rate value R, and exports the blood
Oxygen saturation and the Dynamic Heart Rate value.The third computing module 116 can be used for executing step S160 shown in Fig. 3,
Specific operating method can refer to the detailed description of step S160.
In conclusion detection method provided by the embodiments of the present application, device and detection device 10, utilize the acceleration of acquisition
The heart rate detection wave of acquisition is filtered on the basis of signal to filter out the interference signal that movement introduces, and the dynamic heart is calculated
Rate value and reference signal.Effective section extraction is carried out with blood oxygen detection wave of the reference signal to acquisition, and utilizes preset algorithm pair
The blood oxygen detection wave extracted is calculated to obtain rate value R, blood oxygen saturation is calculated according to rate value R, and export
Obtained Dynamic Heart Rate value and blood oxygen saturation.The detection scheme, using on the basis of the acceleration signal of acquisition to heart rate detection
Wave is filtered to avoid the interference signal introduced by movement influence caused by testing result.Also, it utilizes and is examined according to heart rate
It surveys the reference signal that wave obtains and effective section extraction is carried out to blood oxygen detection wave, using the blood oxygen detection wave extracted to be calculated
Blood oxygen saturation.Avoid detecting due to blood oxygen wave because anti-interference ability it is weaker caused by the dysgenic disadvantage of testing result
End.
In embodiment provided herein, it should be understood that disclosed device and method, it can also be by other
Mode realize.The apparatus embodiments described above are merely exemplary, for example, the flow chart and block diagram in attached drawing are shown
Architectural framework in the cards, function and the behaviour of devices in accordance with embodiments of the present invention, method and computer program product
Make.In this regard, each box in flowchart or block diagram can represent a part of a module, section or code, institute
The a part for stating module, section or code includes one or more executable instructions for implementing the specified logical function.
It should also be noted that function marked in the box can also be to be different from attached drawing in some implementations as replacement
The sequence marked occurs.For example, two continuous boxes can actually be basically executed in parallel, they sometimes can also be by
Opposite sequence executes, and this depends on the function involved.It is also noted that each box in block diagram and or flow chart,
And the combination of the box in block diagram and or flow chart, hardware can be based on the defined function of execution or the dedicated of movement
System realize, or can realize using a combination of dedicated hardware and computer instructions.
It should be noted that, in this document, the terms "include", "comprise" or its any other variant are intended to non-row
His property includes, so that the process, method, article or equipment for including a series of elements not only includes those elements, and
And further include other elements that are not explicitly listed, or further include for this process, method, article or equipment institute it is intrinsic
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including institute
State in the process, method, article or equipment of element that there is also other identical elements.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.It should also be noted that similar label and letter exist
Similar terms are indicated in following attached drawing, therefore, once being defined in a certain Xiang Yi attached drawing, are then not required in subsequent attached drawing
It is further defined and explained.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (10)
1. a kind of detection method, which is characterized in that be applied to detection device, the detection device includes light source equipment, optical detection
Device and acceleration transducer, which comprises
The detection light for multiple and different wavelength that the optical detector is issued in the light source equipment is obtained after tested tissue
Obtained photoplethysmographic signal, the photoplethysmographic signal include heart rate detection wave and blood oxygen detection wave；
Using on the basis of the collected acceleration signal of the acceleration transducer of acquisition to carry because movement introducing do
The heart rate detection wave for disturbing signal is filtered to obtain the heart rate detection wave after filtering interference signals；
Dynamic Heart Rate value and reference signal is calculated according to the heart rate detection wave after filtering processing；
Effective section extraction is carried out to blood oxygen detection wave according to the reference signal；
The blood oxygen detection wave extracted is calculated to obtain blood oxygen relevant parameter using preset algorithm, and according to the blood oxygen
Rate value R is calculated in relevant parameter；
Blood oxygen saturation is calculated according to the rate value R, and exports the blood oxygen saturation and the Dynamic Heart Rate value.
2. detection method according to claim 1, which is characterized in that the heart rate detection wave meter according to after filtering processing
Calculation obtains the step of Dynamic Heart Rate value and reference signal, comprising:
Time Domain Processing and frequency domain processing are carried out to the heart rate detection wave after filtering processing, after respectively obtaining Time Domain Processing
Heart rate value and frequency domain treated heart rate value；
In conjunction with the last moment at current time heart rate value and Time Domain Processing after heart rate value and frequency domain treated heart rate value
And the heart rate value at current time is calculated to obtain Dynamic Heart Rate value using Kalman filtering algorithm；
Reference signal is obtained according to the heart rate detection wave after filtering processing.
3. detection method according to claim 1, which is characterized in that the reference signal includes multi-segment signal, and described
After the step of Dynamic Heart Rate value and reference signal is calculated according to the heart rate detection wave after filtering processing, the method is also wrapped
The step of whether the detection reference signal reaches preset requirement is included, which includes:
For each segment signal in the reference signal, two extreme points of the segment signal are obtained；
The interval sampling points between described two extreme points are obtained, and whether detect the interval sampling points in preset
Heart rate range if being in preset heart rate range, then determines maximum value and minimum value of the segment signal in single pulse cycle；
Detect whether the situation of change between the maximum value and minimum value meets preset heartbeat rule, if satisfied, then
Determine that the reference signal reaches preset requirement.
4. detection method according to claim 1, which is characterized in that the blood oxygen detection wave includes two kinds, the utilization
Preset algorithm calculates to obtain blood oxygen relevant parameter the blood oxygen detection wave extracted, and according to the blood oxygen relevant parameter
The step of rate value R is calculated, comprising:
The incident intensity and penetration range of the blood oxygen detection wave are obtained, and the blood extracted is calculated as follows
The minimum value R of oxygen detection wave corresponding waveform during single pulseL/IRLWith maximum value RH/IRH:
According to the minimum value RL/IRLWith maximum value RH/IRHAnd rate value R is calculated as follows:
Wherein, RL/IRLThe minimum value of wave corresponding waveform during single pulse, R are detected for blood oxygenH/IRHWave is detected for blood oxygen
The maximum value of corresponding waveform, I during single pulseoFor incident intensity, α is tested tissue absorptance, λR/λIRIt indicates to inhale
Backscatter extinction logarithmic ratio, αAIndicate arterial blood absorptance, d indicates that penetration range, Δ d indicate variable quantity caused by heart contraction and diastole.
5. detection method according to claim 1, which is characterized in that described to be examined using preset algorithm to the blood oxygen extracted
It surveys wave to be calculated to obtain blood oxygen relevant parameter, and the step of rate value R is calculated according to the blood oxygen relevant parameter, packet
It includes:
For each adjacent two sampled point in the corresponding waveform of blood oxygen detection wave extracted, it is corresponding to calculate two sampled points
The difference for the of ac that the optical detector is exported, by the difference, DC quantity corresponding with each sampled point carries out phase respectively
Than to obtain ratio, and by obtain two ratios mutually divided by obtaining single rate value；
By the blood oxygen extracted detect the corresponding single rate value of all two neighboring sampled point in wave carry out mean value computation with
Obtain rate value R.
6. detection method according to claim 1, which is characterized in that described to be examined according to the reference signal to the blood oxygen
It surveys before the step of wave carries out the extraction of effective section, the method also includes:
Signal quality assessment value is obtained according to the acceleration signal and the Dynamic Heart Rate value；
It detects whether the Signal quality assessment value meets default assessment requirement, if meeting the default assessment requirement, executes
It is described that the step of effective section is extracted is carried out to blood oxygen detection wave according to the reference signal.
7. detection method according to claim 1, which is characterized in that described to be examined according to the reference signal to the blood oxygen
It surveys after the step of wave carries out the extraction of effective section, the method also includes:
The blood oxygen detection wave extracted is carried out at adaptive-filtering based on the reference signal and using adaptive filter algorithm
Reason.
8. detection method described in -7 any one according to claim 1, which is characterized in that the corresponding inspection of the heart rate detection wave
Survey light is green light, and it includes feux rouges and infrared light that the blood oxygen, which detects the corresponding detection light of wave,.
9. a kind of detection device, which is characterized in that be applied to detection device, the detection device includes light source equipment, optical detection
Device and acceleration transducer, the detection device include:
Signal acquisition module, for obtaining the detection for multiple and different wavelength that the optical detector is issued in the light source equipment
Light obtained photoplethysmographic signal after tested tissue, the photoplethysmographic signal include heart rate detection
Wave and blood oxygen detect wave；
Module is filtered, to carrying on the basis of the collected acceleration signal of the acceleration transducer for utilizing acquisition
There is the heart rate detection wave of the interference signal introduced by movement to be filtered to obtain the heart rate detection after filtering interference signals
Wave；
First computing module, for Dynamic Heart Rate value and benchmark letter to be calculated according to the heart rate detection wave after filtering processing
Number；
Extraction module, for carrying out effective section extraction to blood oxygen detection wave according to the reference signal；
Second computing module, for being calculated the blood oxygen detection wave extracted to obtain blood oxygen correlation ginseng using preset algorithm
Number, and rate value R is calculated according to the blood oxygen relevant parameter；
Third computing module, for blood oxygen saturation to be calculated according to the rate value R, and export the blood oxygen saturation with
And the Dynamic Heart Rate value.
10. a kind of detection device characterized by comprising
Light source equipment；
Optical detector；
Acceleration transducer；
Memory；
Processor；And
Detection device, the software function mould for being stored in the memory and being executed by the processor including one or more
Block, the detection device include:
Signal acquisition module, for obtaining the detection for multiple and different wavelength that the optical detector is issued in the light source equipment
Light obtained photoplethysmographic signal after tested tissue, the photoplethysmographic signal include heart rate detection
Wave and blood oxygen detection；
Module is filtered, to carrying on the basis of the collected acceleration signal of the acceleration transducer for utilizing acquisition
There is the heart rate detection wave of the interference signal introduced by movement to be filtered to obtain the heart rate detection after filtering interference signals
Wave；
First computing module, for Dynamic Heart Rate value and benchmark letter to be calculated according to the heart rate detection wave after filtering processing
Number；
Extraction module, for carrying out effective section extraction to blood oxygen detection wave according to the reference signal；
Second computing module, for being calculated the blood oxygen detection wave extracted to obtain blood oxygen correlation ginseng using preset algorithm
Number, and rate value R is calculated according to the blood oxygen relevant parameter；
Third computing module, for blood oxygen saturation to be calculated according to the rate value R, and export the blood oxygen saturation with
And the Dynamic Heart Rate value.
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