CN110200642A - A kind of measurement method and terminal of cognitive load and psychological pressure - Google Patents
A kind of measurement method and terminal of cognitive load and psychological pressure Download PDFInfo
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- CN110200642A CN110200642A CN201910482204.6A CN201910482204A CN110200642A CN 110200642 A CN110200642 A CN 110200642A CN 201910482204 A CN201910482204 A CN 201910482204A CN 110200642 A CN110200642 A CN 110200642A
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- 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
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Abstract
The application discloses the measurement method and terminal of a kind of cognitive load and psychological pressure.The measurement method of the cognitive load and psychological pressure, comprising: obtain the human body PPG signal of the measured；According to human body PPG signal and cognitive load and the association analysis of psychological pressure as a result, the cognitive load of prediction the measured and psychological pressure are horizontal.The measuring terminals include acquisition module and measurement module；Acquisition module acquires PPG signal by the PPG signal collecting device connecting with the measuring terminals；Measurement module executes the measurement method of above-mentioned cognitive load and psychological pressure.The application substantially increases the accuracy and real-time of measurement result according to characteristics of human body's PPG signal estimation cognitive load and psychological pressure level using the above-mentioned cognitive load based on human body PPG waveform and psychological pressure measurement method.
Description
Technical field
This application involves the measurements of computer and physiological psychology field more particularly to a kind of cognitive load and psychological pressure
Method and terminal.
Background technique
In human-computer interaction process, in addition to traditional interactive mode, machine to the perception of Human Physiology psychological condition increasingly
It is important.However, how to get the psychological condition information of human body by sensor, especially cognitive load and psychological pressure shape
State is not solved effectively always.
PPG (photoplethysmograph, full name capacity of blood vessel pulse tracing) refers to blood vessel using photoelectricity means
Volume variation is reflected as electric signal.The capacity of blood vessel obtained by PPG changes waveform and is known as PPG signal.Human capillary vessel by
The control of human body vegetative nerve, and vegetative nerve from psychological pressure level can not be in different shapes together with human body cognitive load
State.Therefore, the just information comprising human body cognitive load Yu psychological pressure level in the variation of capacity of blood vessel.However how from
Cognitive load is extracted in PPG signal and psychological pressure horizontal information is always a problem of industry.
Current existing means usually utilize the means such as skin resistance, electrocardio, extract in skin resistance and electrocardiosignal
HRV out carries out cognitive load further according to HRV and psychological pressure measures.This method and step is complex, is substantially utilized
The information of frequency domain, but measure accuracy and real-time have it is to be hoisted.
Summary of the invention
This application provides a kind of cognitive loads of human body PPG signal and psychological pressure measurement method, include the following steps:
Obtain the human body PPG signal of the measured；
According to PPG signal and cognitive load and the association analysis of psychological pressure as a result, the cognition of prediction the measured is negative
Lotus and psychological pressure are horizontal.
Cognitive load as described above and psychological pressure measurement method, wherein the PPG signal of the measured is obtained, including
The PPG signal of the measured is acquired by the equipment that contact acquires PPG signal or by contactless acquisition PPG signal
Equipment acquires the PPG signal of the measured.
Cognitive load as described above and psychological pressure measurement method, wherein the method also includes to the measured
PPG signal is pre-processed, and filtering, smooth and normalized are specifically included.
Cognitive load as described above and psychological pressure measurement method, wherein the method also includes obtain PPG signal and
Cognitive load and the association analysis of psychological pressure are as a result, specifically include following sub-step:
Obtain a large amount of original PPG signals；
According to a large amount of original PPG signals, the association analysis result of PPG signal and cognitive load and psychological pressure is determined.
Cognitive load as described above and psychological pressure measurement method, wherein according to a large amount of original PPG signals, determine PPG
Signal and cognitive load and the association analysis of psychological pressure are as a result, specifically include: obtaining the waveform shape of a large amount of original PPG signals
State determines the association analysis result of PPG signal and cognitive load and psychological pressure according to PPG waveform morphology；
Or, carrying out learning training to a large amount of original PPG signals using deep learning algorithm, obtains PPG signal and cognition is negative
The association analysis result of lotus and psychological pressure.
Cognitive load as described above and psychological pressure measurement method, wherein PPG signal is determined according to PPG waveform morphology
With cognitive load and the association analysis of psychological pressure as a result, specifically including the waveform for finding PPG signal using statistical method
The fit correlation of form and cognitive load and psychological pressure；Or, training the form according to PPG waveform using machine learning algorithm
Feature predicts the model of cognitive load and psychological pressure.
A kind of measuring terminals, including acquisition module and measurement module is also disclosed in the application；The acquisition module by with institute
State the PPG signal collecting device acquisition PPG signal of measuring terminals connection；The measurement module executes above-mentioned cognitive load and psychology
The measurement method of pressure.
Measuring terminals as described above, wherein PPG signal collecting device include contact acquisition PPG signal equipment and
The equipment of contactless acquisition PPG signal.
Measuring terminals as described above, wherein the measurement module includes PPG Signal Pretreatment submodule, is specifically used for
PPG signal data is filtered, smooth and normalized.
Measuring terminals as described above, wherein the measurement module further includes PPG signal and cognitive load and psychological pressure
Association analysis submodule, specifically include the waveform morphology of PPG signal and the association analysis of cognitive load and psychological pressure
As a result, or PPG signal and cognitive load and psychological pressure deep learning model.
Measuring terminals as described above, wherein the measurement module further includes that cognitive load and psychological pressure predict submodule
Block, specifically for according to the waveform morphology and cognitive load of PPG signal and the association analysis of psychological pressure as a result, prediction is tested
The cognitive load and psychological pressure of amount person is horizontal；Or the PPG signal of testee is inputted into PPG signal and cognitive load and psychology
The deep learning model of pressure, cognitive load and the psychological pressure for obtaining the measured are horizontal.
What the application realized has the beneficial effect that: compared to traditional cognitive load and psychological pressure measurement method, this Shen
Advantage please is the relevance by analyzing human body PPG signal and cognitive load and psychological pressure, by acquiring testee
PPG signal come determine testee cognitive load and psychological pressure it is horizontal, thus from the characteristics of human body of user come into
Row prediction, substantially increases the accuracy and real-time of measurement result.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The some embodiments recorded in invention can also be obtained according to these attached drawings other for those of ordinary skill in the art
Attached drawing.
Fig. 1 is the association analysis result of the PPG signal that the embodiment of the present application one provides and cognitive load and psychological pressure
Calculation method flow chart；
Fig. 2 is to carry out pretreated method flow diagram to original PPG Wave data；
Fig. 3 is the measuring method flow chart of the cognitive load that the embodiment of the present application two provides and psychological pressure；
Fig. 4 is to carry out pretreated method flow diagram to testee's PPG Wave data；
Fig. 5 is the measuring terminals schematic diagram that the embodiment of the present application three provides.
Specific embodiment
With reference to the 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 some of the embodiments of the present invention, instead of all the embodiments.Based on the present invention
In embodiment, those skilled in the art's every other embodiment obtained without making creative work, all
Belong to the scope of protection of the invention.
Perception for more accurate and real-time measurement machine to Human Physiology psychological condition, the application provide a kind of base
In the cognitive load of PPG waveform morphology and the measurement method of psychological pressure and measuring terminals, including described in embodiment one
How to be calculated described in the relevance algorithm of morphological feature and cognitive load and psychological pressure, embodiment two in reality
How recognizing for the measured predicted according to the relevance algorithm of morphological feature and cognitive load and psychological pressure in measurement process
Know a kind of measurement for executing embodiment one and two method of embodiment described in load and psychological pressure level and embodiment three
Terminal.
Embodiment one
As shown in Figure 1, the embodiment of the present application one provides a kind of cognitive load based on PPG signal and psychological pressure measurement side
The calculation method of the association analysis result of PPG signal and cognitive load and psychological pressure, specifically comprises the following steps: in method
Step 110 obtains a large amount of original PPG signals；
Wherein, original PPG signal is obtained, specifically includes and the measured is acquired by the equipment that contact acquires PPG signal
PPG signal or the PPG signal of the measured is acquired by the equipment of contactless acquisition PPG signal；Wherein, contact is adopted
The equipment for collecting PPG signal includes but is not limited to wearable device, touch panel device etc.；The equipment of contactless acquisition PPG signal
Including but not limited to wi f i equipment, video equipment etc..
The application needs first to carry out a large amount of original PPG information before carrying out cognitive load and psychological pressure measurement
Statistical analysis, pre-processes each PPG signal, determines that the relevance of morphological feature and cognitive load and psychological pressure is calculated
Method；
PPG Wave data is pre-processed, including filtering, smooth and normalized, specifically includes following sub-step,
It is as shown in Figure 2:
Step S210, original PPG signal is filtered；
Specifically, original PPG signal is filtered using suitable filter, for example, using FIR (Finite
Impulse Response) filter is filtered original PPG signal.
Step S220, filtered PPG signal is smoothed；
Optionally, according to the suitable smooth window size of practical PPG signal behavior and step parameter, to filtered waveform
It is smoothed, removes the noise section in signal；For example, smooth window size is 5, step-length 1.
Step S230, according to the PPG signal after the regular smooth cut of cutting, single heartbeat waveform is obtained；
Step S240, operation is normalized in the single heartbeat waveform after cutting, waveform is normalized into same range
It is interior；
Optionally, the single heartbeat waveform after cutting is normalized into baseline respectively and normalizes to the range of MxN size
Interior, M, N are positive integer.
Referring back to Fig. 1, a large amount of original PPG signals of step 120, basis determine that PPG signal and cognitive load and psychology are pressed
The association analysis result of power；
Specifically, the association analysis result of PPG signal and cognitive load and psychological pressure specifically includes the wave of PPG signal
Shape form and cognitive load and the association analysis of psychological pressure are as a result, or analyzing PPG signal by deep learning and recognizing negative
The association analysis result of lotus and psychological pressure.
Wherein, the waveform morphology of acquisition PPG signal and cognitive load and the association analysis of psychological pressure are as a result, specific packet
It includes: 1, finding the waveform morphology of PPG signal and the fit correlation of cognitive load and psychological pressure, including line using statistical method
Sexual intercourse or non-linear relation etc.；2, model is trained using machine learning algorithm, which can be according to the form of PPG waveform
Feature predicts cognitive load and psychological pressure；
Optionally, in the embodiment of the present application, waveform morphology analysis is carried out to PPG signal, obtains numerous wave configuration features,
Then the wave configuration feature for therefrom selecting preset quantity, in conjunction with the characteristic statistics of Different Cognitive load and psychological pressure stage
Amount, thus it is speculated that PPG waveform morphology and cognitive load are associated with sexual intercourse with psychological pressure.
The association analysis that PPG signal and cognitive load and psychological pressure are analyzed by deep learning, specifically includes use
Neural network deep learning algorithm carries out learning training using a large amount of PPG waveforms, obtains PPG signal and cognitive load and psychology is pressed
The deep learning model of power.
Embodiment two
By the analysis in embodiment one to a large amount of original PPG signals, PPG signal and cognitive load and psychological pressure are obtained
Association analysis as a result, using this association analysis result as the predefined method in embodiment two, be used in actual measurement
In, predict that the cognitive load of the measured and psychological pressure are horizontal.
As shown in figure 3, the embodiment of the present application two provides a kind of cognitive load based on PPG signal and psychological pressure measurement side
In method according to PPG signal and cognitive load and the association analysis of psychological pressure as a result, prediction the measured cognitive load with
Psychological pressure is horizontal, specifically comprises the following steps:
Step 310, the PPG signal for obtaining the measured；
Specifically, the PPG signal of the measured is acquired by the equipment that contact acquires PPG signal or passed through non-contact
The equipment of formula acquisition PPG signal acquires the PPG signal of the measured；Wherein, the equipment of contact acquisition PPG signal includes but not
It is limited to wearable device, touch panel device etc.；The equipment of contactless acquisition PPG signal includes but is not limited to wifi equipment, view
Frequency equipment etc..
It further include being carried out in advance to the PPG signal of the measured after the PPG signal for obtaining the measured in the present embodiment
Processing, including filtering, smooth and normalized, as shown in figure 4, specifically including following sub-step:
Step 410 is filtered the PPG signal of the measured；
Step 420 is smoothed filtered PPG signal data；
PPG signal data after step 430, smooth cut obtains single heartbeat waveform；
Single heartbeat waveform after cutting is normalized step 440.
Aforesaid operations are similar to the concrete operations of Fig. 2 in embodiment one, and details are not described herein.
Step 320, according to PPG signal and cognitive load and the association analysis of psychological pressure as a result, by the measured
The cognitive load and psychological pressure of PPG signal estimation the measured are horizontal；
Wherein, according to PPG signal and cognitive load and the association analysis of psychological pressure as a result, prediction the measured is recognized
Know that load and psychological pressure are horizontal, specifically includes the PPG waveform shape for extracting testee from the PPG signal of testee
State, according to the waveform morphology of PPG signal and cognitive load and the association analysis of psychological pressure as a result, prediction the measured is recognized
Know that load and psychological pressure are horizontal；Or the PPG signal of testee is inputted to the depth of PPG signal and cognitive load and psychological pressure
Learning model is spent, cognitive load and the psychological pressure for obtaining the measured are horizontal.
Further, in the embodiment of the present application, by the cognitive load of PPG signal estimation the measured of the measured with
Psychological pressure is horizontal, specifically includes N number of PPG waveform before choosing current time and generates prediction result, utilizes normalization algorithm
Prediction result is normalized in critical field, the result after normalization is pressed as the practical cognitive load and psychology at current time
Power measured value；Wherein N is positive integer；
Optionally, being normalized in critical field can be for measurement result to be normalized in 0~1 range, as final
Measurement result.
Embodiment three
The embodiment of the present application three provides a kind of measuring terminals, as shown in figure 5, including acquisition module 510 and measurement module
520；
Acquisition module 510 acquires PPG signal by the PPG signal collecting device connecting with measuring terminals；
Specifically, PPG signal collecting device includes the equipment and contactless acquisition PPG letter of contact acquisition PPG signal
Number equipment；Wherein, the equipment of contact acquisition PPG signal is the equipment for needing human body to wear, including but not limited to wearable
Equipment (such as bracelet, wrist-watch), refer to folder etc.；The equipment of contactless acquisition PPG signal includes but is not limited to be based on wifi communication
Equipment, acquire by touch screen human body PPG signal equipment, human face characteristic point PPG signal obtained by video capture setting
It is standby.
Measurement module 520 is measured according to the PPG signal that acquisition module 510 acquires in measuring terminals；
Wherein, measurement module 520 specifically includes PPG Signal Pretreatment submodule 521, PPG signal and cognitive load and the heart
The association analysis submodule 522 and cognitive load and psychological pressure of reason pressure predict submodule 523；
PPG Signal Pretreatment submodule 521, for being filtered to PPG signal data, smooth and normalized
The association analysis submodule 522 of PPG signal and cognitive load and psychological pressure, specifically includes the wave of PPG signal
Shape form and cognitive load and the association analysis of psychological pressure as a result, or PPG signal and cognitive load and psychological pressure depth
Spend learning model；
Cognitive load and psychological pressure predict submodule 523, specifically for negative according to the waveform morphology of PPG signal and cognition
The association analysis of lotus and psychological pressure is as a result, the cognitive load and psychological pressure of prediction the measured are horizontal；Or it will be tested
The deep learning model of PPG signal input the PPG signal and cognitive load and psychological pressure of person, the cognition for obtaining the measured are negative
Lotus and psychological pressure are horizontal.
Although the preferred embodiment of the application has been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the application range.Obviously, those skilled in the art can be to the application
Various modification and variations are carried out without departing from spirit and scope.If in this way, these modifications and variations of the application
Belong within the scope of the claim of this application and its equivalent technologies, then the application is also intended to encompass these modification and variations and exists
It is interior.
Claims (10)
1. a kind of cognitive load based on human body PPG signal and psychological pressure measurement method, which is characterized in that including walking as follows
It is rapid:
Obtain the human body PPG signal of the measured；
According to PPG signal and cognitive load and the association analysis of psychological pressure as a result, by the measured PPG signal estimation quilt
The cognitive load and psychological pressure of gauger is horizontal.
2. measurement method as described in claim 1, which is characterized in that obtain the PPG signal of the measured, including pass through contact
The equipment of formula acquisition PPG signal acquires the PPG signal of the measured or is acquired by the equipment of contactless acquisition PPG signal
The PPG signal of the measured.
3. measurement method as described in claim 1, which is characterized in that further include being located in advance to the PPG signal of the measured
Reason specifically includes filtering, smooth and normalized.
4. measurement method as described in claim 1, which is characterized in that further include obtaining PPG signal and cognitive load and psychology
The association analysis of pressure is as a result, specifically include following sub-step:
Obtain a large amount of original PPG signals；
According to a large amount of original PPG signals, the association analysis result of PPG signal and cognitive load and psychological pressure is determined.
5. measurement method as claimed in claim 4, which is characterized in that according to a large amount of original PPG signals, determine PPG signal and
Cognitive load and the association analysis of psychological pressure are as a result, specifically include: obtaining the waveform morphology of a large amount of original PPG signals, root
The association analysis result of PPG signal and cognitive load and psychological pressure is determined according to PPG waveform morphology；
Or, carry out learning trainings to a large amount of original PPG signals using deep learning algorithm, obtain PPG signal and cognitive load with
The association analysis result of psychological pressure.
6. measurement method as claimed in claim 5, which is characterized in that determine that PPG signal and cognition are negative according to PPG waveform morphology
The association analysis of lotus and psychological pressure is found the waveform morphology of PPG signal using statistical method and is recognized as a result, specifically including
Know the fit correlation of load and psychological pressure；It is predicted or, being trained using machine learning algorithm according to the morphological feature of PPG waveform
The model of cognitive load and psychological pressure out.
7. measurement method as described in claim 1, which is characterized in that by PPG signal estimation the measured of the measured
Cognitive load and psychological pressure are horizontal, specifically include several PPG waveforms before choosing current time and generate prediction result, benefit
Prediction result is normalized in critical field with normalization algorithm, practical cognition of the result after normalization as current time
Load and psychological pressure measured value.
8. a kind of measuring terminals, which is characterized in that including acquisition module and measurement module；
The acquisition module acquires PPG signal by the PPG signal collecting device connecting with the measuring terminals；
The measurement module executes the measurement side of the cognitive load as described in any one of claim 1-7 and psychological pressure
Method.
9. measuring terminals as claimed in claim 8, which is characterized in that the PPG signal collecting device includes contact acquisition
The equipment of the equipment of PPG signal and contactless acquisition PPG signal.
10. measuring terminals as claimed in claim 8, which is characterized in that the measurement module further includes that PPG signal and cognition are negative
The association analysis submodule and cognitive load of lotus and psychological pressure and psychological pressure predict submodule；
The PPG signal and cognitive load and the association analysis submodule of psychological pressure specifically include the waveform shape of PPG signal
State and cognitive load and the association analysis of psychological pressure as a result, or PPG signal and cognitive load and psychological pressure depth
Practise model；
The cognitive load and psychological pressure prediction submodule be specifically used for according to the waveform morphology and cognitive load of PPG signal with
The association analysis of psychological pressure is as a result, the cognitive load and psychological pressure of prediction the measured are horizontal；Or by testee's
PPG signal inputs the deep learning model of PPG signal and cognitive load and psychological pressure, obtain the cognitive load of the measured with
Psychological pressure is horizontal.
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| CN115153554A (en) * | 2022-08-17 | 2022-10-11 | 国家康复辅具研究中心 | Cognitive load evaluation method and system |
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Application publication date: 20190906 |
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