CN106585444A - Anti-fatigue automobile cushion and anti-fatigue method thereof - Google Patents
Anti-fatigue automobile cushion and anti-fatigue method thereof Download PDFInfo
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- CN106585444A CN106585444A CN201510663124.2A CN201510663124A CN106585444A CN 106585444 A CN106585444 A CN 106585444A CN 201510663124 A CN201510663124 A CN 201510663124A CN 106585444 A CN106585444 A CN 106585444A
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Abstract
The invention provides an anti-fatigue automobile cushion and an anti-fatigue method thereof, and belongs to the field of automobile parts. The anti-fatigue automobile cushion includes a cushion body and a device module; the device module includes a heart rate acquisition unit, a control and processing unit, and an alarm unit; the cushion body is used for supporting the heart rate acquisition unit; the heart rate acquisition unit is used for acquiring pulse wave signals; the control and processing unit is used for sending control information, monitoring the heart rate and the variability thereof, and making a corresponding response to the monitoring result; the alarm unit is used for sending alarm information; the heart rate acquisition unit is arranged in a part contacting a leg, of the cushion body; the heart rate acquisition unit is connected to the control and processing unit; and the control and processing unit is connected to the alarm unit. The anti-fatigue automobile cushion can acquiring the heart rate in real time, and can monitor the fatigue degree in real time.
Description
Technical field
The present invention relates to auto parts machinery field, more particularly to a kind of anti-tired automobile cushion and its anti-fatigue method.
Background technology
Modern society, resident's Automobile ownership ratio and road accident rate all cumulative year after year, traffic safety are most important.
In the traffic accident of a large amount of news report, fatigue driving is the primary killers of road safety.
Have in prior art by the vibrations of control automobile cushion or add with stimulating effect in automobile cushion
Material come prevent human pilot fatigue.
Also there is the Deviant Behavior of the eye feature by face or driving to be detected whether in prior art
Fatigue driving, but this kind of device not yet popularized at present, while this kind of device needs to gather substantial amounts of data, inspection
Existence time hysteresis quality is surveyed, and testing result is not comprehensive, is affected greatly by driver's individual variation and external environment,
High cost and rate of false alarm height.
The content of the invention
It is an object of the invention to provide a kind of anti-tired automobile cushion and its anti-fatigue method, to solve to gather number
Cause the technical problem of wrong report according to big, detection time hysteresis quality, environmental effect and individual variation is measured, with inspection
Survey real-time, anti-interference height and make up the technique effect of individual variation.
To realize above goal of the invention, on the one hand, the present invention provides a kind of anti-tired automobile cushion, including pad
Body and apparatus module,
The apparatus module includes heart rate acquisition unit, control and processing unit and alarm unit；
The pad：For carrying heart rate acquisition unit；
The heart rate acquisition unit：For gathering pulse wave signal；
The control and processing unit：It is for sending control information and monitor heart rate and its variability and right
Monitored results make respective reaction；
The alarm unit：For alert；
The part that the pad is contacted with leg is provided with the heart rate acquisition unit, the heart rate acquisition unit with
Control and processing unit connection, the control and processing unit are connected with alarm unit.
Further, the pad includes air cushion and airway, and the apparatus module also includes air pump,
The air cushion, for making pad close with the contact of leg；
The airway, for the passage to air cushion inflation；
The air pump, for air cushion inflation；
The air pump is connected with control and processing unit, and the air cushion is connected with air pump by airway.
Further, the pad surrounding projection, middle indent, and two are arranged in the side contacted with leg
Individual air cushion, the heart rate acquisition unit are arranged on air cushion.
Further, the heart rate acquisition unit is pressure transducer.
Further, the anti-tired automobile cushion also includes communication unit and external equipment module,
The communication module, the information transfer for control and between processing unit and external equipment module；
The external equipment module, for the control information that response control and processing unit send；
The communication module is connected with control and processing unit, and the communication module is communicated with external equipment module
Connection.
Further, the external equipment module includes mobile unit unit and/or mobile equipment unit；
The mobile unit unit, the control information sent for response control and processing unit and to control
And processing unit sends car outer shroud environment information；
The mobile equipment unit, for receiving information that communication module sends and to control and processing unit
Send car outer shroud environment information.
On the other hand, the present invention provides a kind of anti-tired automobile cushion anti-fatigue method, comprises the steps：
Step S1：When running car, control and processing unit send startup optimization to heart rate acquisition unit
Control information；
Step S2：After heart rate acquisition unit receives the control information of startup optimization, start to pulse wave signal
It is acquired, and pulse wave signal is transferred to into control and processing unit；
Step S3：Control and processing unit are filtered process to the pulse wave signal for receiving, and generate filter
Pulse wave signal after ripple；
Step S4：Control and processing unit carry out the real-time calculating of heart rate by filtered pulse wave signal,
And result of calculation is preserved；
Step S5：After the running car time the default monitoring fatigue time is reached, control and processing unit (22)
With default monitoring frequency phase average stdev value SDNN between RR and/or the sympathetic nerve in frequency-domain index
Activity index low-frequency range LF value and vagal tone index high band HF values carry out fatigue strength analysis；
Step S6：When fatigue strength reaches preset fatigue value, control and processing unit send tired to alarm unit
Labor alerts alarm signal；
Step S7：When heart rate acquisition unit does not collect pulse wave signal and automobile dwell time reaches default
Between after, control and processing unit send control information out of service to heart rate acquisition unit；
Step S8：It is after heart rate acquisition unit receives control information out of service, out of service.
Further, in step S5, control and processing unit are average to the phase between RR with default monitoring frequency
The method that value standard deviation SDNN carries out fatigue strength analysis is as follows；
When the running car time default monitoring tired time is reached, control and processing unit will phases between RR this moment
Average stdev value SDNN is used as non-tired time domain index basic parameter；
After the running car time the default monitoring fatigue time is reached, control and processing unit are with default monitoring frequency
Rate is calculated phase average stdev value SDNN between RR, and result of calculation is referred to non-tired time domain
Mark basic parameter compares；Obtain fatigue strength.
Further, control in step S5 and processing unit is to preset monitoring frequency in frequency-domain index
The method that low frequency power index LF value and high frequency power index HF value carry out fatigue strength analysis is as follows,
When the running car time default monitoring tired time is reached, control and processing unit will low frequency work(this moment
Rate index LF value and high frequency power index HF value are used as non-tired frequency-domain index basic parameter；
After the running car time the default monitoring fatigue time is reached, control and processing unit are with default monitoring frequency
Rate is calculated to low frequency power index LF value and high frequency power index HF value, and result of calculation is tired with non-
Labor frequency-domain index basic parameter compares；Obtain fatigue strength；
Further, also include in step S5 that control and processing unit pass through mobile unit unit and/or shifting
Dynamic unit obtains vehicle running environment parameter, and according to ambient parameter amendment degree of fatigue；
Further, in step S3, control and processing unit are entered to pulse wave signal by Welch algorithms
Row Filtering Processing；
Further, in step S5, control and processing unit calculate phase average stdev value between RR
The formula of SDNN is as follows：
Wherein N is the total heart beats that monitors in preset time period, RRiFor the phase between i-th RR；Wherein i
It is the sequence number of phase between RR,For N number of heartbeat RR between phase meansigma methodss.
Compared with prior art, the invention has the beneficial effects as follows：
1. it is used in where pad is contacted with leg and installs heart rate acquisition unit additional, and by hrv parameter
The technical scheme of monitoring, is known heart rate situation, the technique effect of monitor in real time degree of fatigue in real time.
2. it is used between pad and leg and installs air cushion additional, and installs the technology of heart rate acquisition unit on air cushion additional
Scheme, is obtained leg and fitness height, the high technology effect of gathered data accuracy is contacted with heart rate acquisition unit
Really.
3. use mobile unit and mobile device to obtain the technical scheme of ambient parameters, obtaining can be to tired
The technique effect that labor intensity grade is modified according to practical situation.
Description of the drawings
Fig. 1 is a structural representation of the anti-tired automobile cushion of the present invention.
Fig. 2 is another structural representation of the anti-tired automobile cushion of the present invention.
Fig. 3 is another structural representation of the anti-tired automobile cushion of the present invention.
Fig. 4 is a block diagram of the anti-fatigue method of the anti-tired automobile cushion of the present invention.
Fig. 5 is another block diagram of the anti-fatigue method of the anti-tired automobile cushion of the present invention.
Fig. 6 is another block diagram of the anti-fatigue method of the anti-tired automobile cushion of the present invention.
Fig. 7 is another block diagram of the anti-fatigue method of the anti-tired automobile cushion of the present invention.
In figure：
Pad 1；Air cushion 11；Airway 12；
Apparatus module 2；Heart rate acquisition unit 21；Control and processing unit 22；Alarm unit 23；Air pump
24；
Communication module 3；
External equipment module 4；Mobile unit unit 41；Mobile equipment unit 42.
Specific embodiment
One structural representation of a kind of anti-tired automobile cushion of present invention offer is illustrated in figure 1, this is anti-tired
Labor automobile cushion includes：Pad (1) and apparatus module (2), apparatus module (2) is including the heart
Rate collecting unit (21), control and processing unit (22) and alarm unit (23).Specifically, at this
In invention, heart rate acquisition unit (21) is installed on the part that pad (1) is contacted with leg, by human body stock
Tremulous pulse is gathering pulse wave；Heart beating collecting unit (21) is connected with control and processing unit (22), heart beating
The pulse wave signal of collection is sent to control and processing unit (22) by collecting unit (21)；Control and process
Unit (22) is connected with alarm unit (23), at control and processing unit (22) are to pulse wave signal
When reason notes abnormalities, send to alarm unit (23) and report to the police and control signal, alarm unit (23) docking
The information for receiving makes corresponding action, such as sound and light alarm, cell-phone customer terminal warning etc..
Further, such as a kind of anti-another structural representation of tired automobile cushion that Fig. 2 is provided, wherein
Pad (1) includes air cushion (11) and airway (12), and apparatus module (2) also includes air pump (24).
Specifically, in the present invention, heart rate acquisition unit (21) is installed on air cushion (11)；Air cushion (11)
The part that pad (1) is contacted with leg is installed on, for making automobile leg and heart during travelling and jolting
Rate collecting unit (21) fitness is improved；Control and processing unit (22) are by air pump (24) and inducing QI
Pipe (12) is inflated to air cushion (11), ensures that air cushion tolerance is sufficient with this.
Further, such as a kind of anti-another structural representation of tired automobile cushion that Fig. 3 is provided, wherein
Anti- tired automobile cushion also includes communication module (3) and external equipment module (4), external equipment module (4)
Including mobile unit unit (41) and mobile equipment unit (42).Specifically, in the present invention, control
And processing unit (22) carries out information communication by communication module (3) with external equipment module (4), control
System and processing unit (22) obtain Current vehicle place ambient parameters by external equipment module (4).
A step for being illustrated in figure 4 the anti-fatigue method of a kind of anti-tired automobile cushion of present invention offer is shown
It is intended to, comprises the steps：
Step S1：When running car, control and processing unit send startup optimization to heart rate acquisition unit
Control information；
Step S2：After heart rate acquisition unit receives the control information of startup optimization, start to pulse wave signal
It is acquired, and pulse wave signal is transferred to into control and processing unit；
Step S3：Control and processing unit are filtered process to the pulse wave signal for receiving, and generate filter
Pulse wave signal after ripple；
Step S4：Control and processing unit carry out real-time rate calculation to filtered pulse wave signal, and will
Result of calculation is preserved；
Step S5：After the running car time the default monitoring fatigue time is reached, control and processing unit are with pre-
If monitoring frequency is phase average stdev value SDNN between RR and/or the low frequency power index in frequency-domain index
LF and high frequency power index HF carry out fatigue strength analysis；
Step S6：When fatigue strength reaches preset fatigue value, control and processing unit send tired to alarm unit
Labor alerts alarm signal；
Step S7：When heart rate acquisition unit does not collect pulse wave signal and automobile dwell time reaches default
Between after, control and processing unit send control information out of service to heart rate acquisition unit；
Step S8：It is after heart rate acquisition unit receives control information out of service, out of service.
Specifically, after current automobile starting, heart rate acquisition unit (21) begins to enter pulse wave signal
Row collection；Due to vehicle order of contact in the process of moving often in jounce condition, leg and pad (1)
Can change with jolting, so as to produce pressure oscillation of the leg to pad (1), cause heart rate acquisition unit
(21) occurs clutter to pulse wave signal collection, control and processing unit (22) are receiving pulse wave letter
After number, process can be filtered to signal, be filtered due to the noise signal of generation of jolting, control and process list
First (22) are processed and are analyzed to the pulse wave signal after filtration；After running car is to Preset Time,
For example after travelling 10 minutes, control and processing unit (22) start at a time interval, such as 5 minutes
Carry out phase average stdev value SDNN between RR and/or low frequency power index LF in frequency-domain index and
High frequency power index HF carries out fatigue strength analysis.It is up to when fatigue strength reaches severe fatigue or running car
During to preset duration, control and processing unit (22) can be to alarm unit (23) alerts；Report
Alert unit (23) is reported to the police accordingly according to warning message.
Further, another step for the anti-fatigue method of a kind of anti-tired automobile cushion for being provided such as Fig. 5
Control in schematic diagram, wherein step S5 and processing unit is to preset monitoring frequency to phase meansigma methodss standard between RR
The method that difference SDNN carries out fatigue strength analysis is as follows,
When the running car time default monitoring tired time is reached, control and processing unit will phases between RR this moment
Average stdev value SDNN value is used as non-tired basic parameter；
After the running car time the default monitoring fatigue time is reached, control and processing unit are with default monitoring frequency
Rate is calculated phase average stdev value SDNN value between RR, and by result of calculation and non-tired benchmark
Parameter compares；Obtain fatigue strength.
Specifically, standard deviation of the phase average stdev value SDNN value for normal RR-intervals between RR；Face
SDNN on bed<100ms is reduced for HRV moderates, SDNN<50ms is substantially reduced for HRV, disease
Dead rate can be greatly increased；We are using SDNN as a whether tired index of judgement；Calculate SDNN public
Formula is as follows：
Wherein N is the total heart beats that monitors in preset time period, RRiFor the phase between i-th RR；For N
Phase meansigma methodss between the RR of individual heartbeat.Calculate driver and start to drive the SDNN values of front ten minutes as non-tired
Labor basic parameter, is calculated SDNN values and is compared with benchmark, if dramatically increasing and exceeding in driving procedure
Threshold range, then it is assumed that driver enters fatigue state.
Further, another step for the anti-fatigue method of a kind of anti-tired automobile cushion for being provided such as Fig. 6
Schematic diagram, wherein control and processing unit are with low in presetting monitoring frequency to frequency-domain index in step S5
The method that frequency power index LF and high frequency power index HF carry out fatigue strength analysis is as follows,
When the running car time default monitoring tired time is reached, control and processing unit will low frequency work(this moment
Rate index LF value and high frequency power index HF value are used as non-tired basic parameter；
After the running car time the default monitoring fatigue time is reached, control and processing unit are with default monitoring frequency
Rate is calculated to low frequency power index LF value and high frequency power index HF value, and result of calculation is tired with non-
Labor basic parameter compares；Obtain fatigue strength.
Specifically, HRV frequency-domain analysiss principle is phase or instantaneous heart rate signal point between the RR by change at random
Solution is analyzed into the frequency content of various different-energies, it can be estimated that cardiac sympathetic and vagal activity water
It is flat.Phase signal between RR is carried out auto-regressive parameter modelling (AR) computing by control and processing unit (22)
Or after Short Time Fourier Transform, obtain with frequency (Hz) as abscissa, power spectral density (Power Spectral
Density, PSD, S2/Hz) for the Heart Rate Variability Power Spectral Analysis figure of vertical coordinate.Integral and calculating low frequency power (LF),
LF represents sympathetic nerve or by sympathetic nerve and vagal double influence；Integral and calculating high frequency power
(HF), HF reflections vagal tone；LF values can reflect sympathetic with the ratio (LF/HF) of HF values
It is harmonious with vagal activity.Calculate driver and start to drive LF, HF value of front ten minutes as non-fatigue
Basic parameter, calculates LF, HF value in driving procedure and benchmark is compared, if LF is dramatically increased and surpassed
Go out threshold range, HF is significantly reduced and beyond threshold range, then it is assumed that driver enters fatigue state.
Further, another step for the anti-fatigue method of a kind of anti-tired automobile cushion for being provided such as Fig. 7
Also include control and processing unit (22) by mobile unit unit (41) in schematic diagram, wherein step S5
And/or mobile equipment unit (42) obtains vehicle running environment parameter, and according to ambient parameter amendment fatigue journey
Degree grade.Specifically, the environment residing for automobile, for example：Rainy day, night, pavement behavior is bad,
Itself speed etc., all can affect to the heart rate of human pilot, for example：Rainy day or night,
Human pilot can be answered spiritual high concentration and be caused rapid heart rate etc., and control and processing unit (22) can bases
The vehicle running environment situation fed back by mobile unit unit (41) and mobile equipment unit (42) is to fatigue
Degree value is modified, for example：When driver enters high-risk environment (for example：Traffic accident section occurred frequently, road surface
Environment is poor, the rainy day, night), measure HRV time interval shorten (for example from 5 minutes measurement HRV
Index foreshortens to the HRV index of measurement in 2 minutes), such as find have exception to report to the police immediately, that is, increase and report to the police
Frequency.
Correct damage parameters (parameter not changed over) to additionally include using map, environment：
GPS/ architectures vehicle institute using mobile unit unit (41) and/or mobile equipment unit (42) is in place
Put, map reads the section classification of place highway, for each type highway gives correction factor (such as one-level
Highway：1.2, Class II highway：1.15), now the HRV indexs of driver are multiplied by this correction factor and are
The HRV correction values of driver, are obtained the tired situation of driver by the value, are compared with non-tired benchmark.
(Class I highway vehicle flowrate is big, speed fast, and driver's more fatiguability should shorten driver's driving time).Rain
The poor environments such as its night also give a correction factor (such as the rainy day：1.2, night 1.1), now driver
HRV indexs be multiplied by this correction factor be driver HRV correction values, driven by the value
The tired situation of member, is compared with non-tired benchmark.Automobile driving speed is classified, each rank gives
Correction factor (more than 120km/h is one-level, and correction factor is 1.25, and 100～more than 119km/h is two grades,
Correction factor is 1.2 etc.), driver's fatigue degree is modified, now the HRV indexs of driver are multiplied by
HRV correction value of this correction factor for driver, obtains the tired situation of driver by the value, with
Non- tired benchmark compares.
Further, in step S3 control and processing unit (22) by Welch algorithms to pulse wave signal
It is filtered process.
It should be noted that above-described embodiment can independent assortment as needed.The above is only the present invention
Preferred implementation, it is noted that for those skilled in the art, without departing from
On the premise of the principle of the invention, some improvements and modifications can also be made, these improvements and modifications also should be regarded as
Protection scope of the present invention.
Claims (13)
1. a kind of anti-tired automobile cushion, including pad (1), it is characterised in that also including apparatus module
(2)；
The apparatus module (2) includes heart rate acquisition unit (21), control and processing unit (22)
With alarm unit (23)；
The pad (1), for carrying heart rate acquisition unit (21)；
The heart rate acquisition unit (21), for gathering pulse wave signal；
The control and processing unit (22), for sending control information and monitor heart rate and its variability,
And respective reaction is made to monitored results；
The alarm unit (23), for alert；
The part that the pad (1) is contacted with leg is provided with the heart rate acquisition unit (21), the heart rate
Collecting unit (21) with control and processing unit (22) be connected, it is described control and processing unit (22) and
Alarm unit (23) connects.
2. anti-tired automobile cushion as claimed in claim 1, it is characterised in that the pad (1) includes
Air cushion (11) and airway (12), the apparatus module (2) also include air pump (24),
The air cushion (11), for making pad close with the contact of leg；
The airway (12), for the passage to air cushion inflation；
The air pump (24), for air cushion inflation；
The air pump (24) is connected with control and processing unit (22), and the air cushion (11) is by inducing QI
Pipe (12) is connected with air pump (24).
3. anti-tired automobile cushion as claimed in claim 2, it is characterised in that pad (1) surrounding
Projection, middle indent, and two air cushions (11) are set in the side contacted with leg, the heart rate collection is single
First (21) are arranged on air cushion (11).
4. the anti-tired automobile cushion as described in arbitrary in claim 1-3, it is characterised in that the heart rate is adopted
Collection unit (21) is pressure transducer.
5. the anti-tired automobile cushion as described in arbitrary in claim 1-3, it is characterised in that the anti-tired vapour
Car medicated cushion also includes communication module (3) and external equipment module (4),
The communication module (3), between control and processing unit (22) and external equipment module (4)
Information transfer；
The external equipment module (4), for the control information that response control and processing unit (22) send；
The communication module (3) and control and processing unit (22) communication connection, the communication module (3)
Communicate to connect with external equipment module (4).
6. anti-tired automobile cushion as claimed in claim 5, it is characterised in that the external equipment module (4)
Including mobile unit unit (41) and/or mobile equipment unit (42)；
The mobile unit unit, the control information sent for response control and processing unit (22) and
Car outer shroud environment information is sent to control and processing unit (22)；
The mobile equipment unit, for receiving information that communication module (3) sends and to control and processing
Unit (22) sends car outer shroud environment information.
7. the anti-fatigue method of a kind of anti-tired automobile cushion, it is characterised in that the anti-tired automobile cushion prevents tired
Labour's method is applied to the anti-tired automobile cushion as described in arbitrary in claim 1-6, comprises the steps：
Step S1：When running car, control and processing unit (22) are sent out to heart rate acquisition unit (21)
Go out the control information of startup optimization；
Step S2：After heart rate acquisition unit (21) receives the control information of startup optimization, start to pulse
Ripple signal is acquired, and pulse wave signal is transferred to control and processing unit (22)；
Step S3：Control and processing unit (22) are filtered process to the pulse wave signal for receiving, and
Generate filtered pulse wave signal；
Step S4：Control and processing unit (22) carry out the real-time of heart rate by filtered pulse wave signal
Calculate, and result of calculation is preserved；
Step S5：After the running car time the default monitoring fatigue time is reached, control and processing unit (22)
With default monitoring frequency phase average stdev value SDNN between RR and/or the sympathetic nerve in frequency-domain index
Activity index low-frequency range LF value and vagal tone index high band HF values carry out fatigue strength analysis；
Step S6：When fatigue strength reaches preset fatigue value, control and processing unit (22) are to alarm unit
(23) send fatigue alarm alarm signal；
Step S7：When heart rate acquisition unit (21) does not collect pulse wave signal and automobile dwell time reaches
After Preset Time, control and processing unit (22) send control out of service to heart rate acquisition unit (21)
Information；
Step S8：It is after heart rate acquisition unit (21) receives control information out of service, out of service.
8. the anti-fatigue method of anti-tired automobile cushion as claimed in claim 7, it is characterised in that the step
In S5, control and processing unit (22) are entered to phase average stdev SDNN between RR with default monitoring frequency
The method of row fatigue strength analysis is as follows,
When the running car time the default monitoring fatigue time is reached, control and processing unit (22) will this moment
Between RR, phase average stdev value SDNN is used as non-tired time domain index basic parameter；
After the running car time the default monitoring fatigue time is reached, control and processing unit (22) are with default
Monitoring frequency is calculated phase average stdev value SDNN between RR, and by result of calculation and non-fatigue
Time domain index basic parameter compares；Obtain fatigue strength.
9. the anti-fatigue method of anti-tired automobile cushion as claimed in claim 7, it is characterised in that the step
Control in S5 and processing unit (22) is to preset monitoring frequency to the sympathetic activity index in frequency-domain index
The method that low-frequency range LF value and vagal tone index high band HF values carry out fatigue strength analysis is as follows,
When the running car time the default monitoring fatigue time is reached, control and processing unit (22) will this moment
Sympathetic activity index low-frequency range LF value and vagal tone index high band HF values in frequency-domain index
As non-tired frequency-domain index basic parameter；
After the running car time the default monitoring fatigue time is reached, control and processing unit (22) are with default
Monitoring frequency is entered to sympathetic activity index low-frequency range LF value and vagal tone index high band HF values
Row is calculated, and by result of calculation and non-tired frequency-domain index basic parameter；Relatively；Obtain fatigue strength.
10. the anti-fatigue method of anti-tired automobile cushion as described in arbitrary in claim 7-9, it is characterised in that
Also include control and processing unit (22) by mobile unit unit and/or mobile device list in step S5
Unit obtains vehicle running environment parameter, and according to ambient parameter amendment degree of fatigue.
The 11. anti-fatigue methods of anti-tired automobile cushion as described in arbitrary in claim 7-9, it is characterised in that
In step S3, control and processing unit (22) are filtered place by Welch algorithms to pulse wave signal
Reason.
The anti-fatigue method of 12. as claimed in claim 10 anti-tired automobile cushions, it is characterised in that the step
In rapid S3, control and processing unit (22) are filtered process by Welch algorithms to pulse wave signal.
The anti-fatigue method of 13. as claimed in claim 8 anti-tired automobile cushions, it is characterised in that the step
In rapid S5, between control and processing unit (22) calculating RR, the formula of phase average stdev value SDNN is as follows：
Wherein N is the total heart beats that monitors in preset time period, RRiFor the phase between i-th RR；Wherein
I is the sequence number of phase between RR,For N number of heartbeat RR between phase meansigma methodss.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109938719A (en) * | 2019-03-21 | 2019-06-28 | 扬州大学 | A kind of Driver Fatigue Detection based on physiological parameter |
| CN112971749A (en) * | 2021-03-23 | 2021-06-18 | 童心堂健康科技(北京)有限公司 | Fatigue detection method and device based on artificial intelligence |
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