CN105534531A - Method and system for preventing fatigue driving - Google Patents
Method and system for preventing fatigue driving Download PDFInfo
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- CN105534531A CN105534531A CN201410597635.4A CN201410597635A CN105534531A CN 105534531 A CN105534531 A CN 105534531A CN 201410597635 A CN201410597635 A CN 201410597635A CN 105534531 A CN105534531 A CN 105534531A
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Abstract
The invention discloses a method and system for preventing fatigue driving. The method comprises the following steps: acquiring a plurality of groups of oxyhemoglobin saturation original signals of a driver under the normal physical condition; carrying out signal conditioning on the plurality of groups of oxyhemoglobin saturation original signals, and calculating to obtain a plurality of oxyhemoglobin saturations; calculating to obtain the average value of the oxyhemoglobin saturations; setting an oxyhemoglobin saturation threshold value according to the average value of the oxyhemoglobin saturations; acquiring oxyhemoglobin saturation original signals of the driver in real time; and carrying out signal conditioning on the oxyhemoglobin saturation original signals acquired in real time, calculating to obtain the oxyhemoglobin saturations, and warning the driver if the oxyhemoglobin saturations acquired in real time are continuously lower than the first time preset by the oxyhemoglobin saturation threshold value. According to the method and the system provided by the invention, electrode plates are not needed for acquiring the oxyhemoglobin saturation original signals, so that the driver can not have the body discomfort and antipathy, and therefore, the practicability is strong.
Description
Technical field
The present invention relates to Vehicle Engineering technical field, particularly relate to a kind of method and system of anti-fatigue-driving.
Background technology
Fatigue driving is the major reason that vehicle accident occurs, the method of current monitoring driver fatigue state is mainly through monitoring the physiological parameter of driver, as electroencephalogram, electrocardiogram, electromyogram etc., but it is measured needs to install and measure device at the health of driver or head, the driving of easy interference driver, therefore driver is often reluctant to use.
In sum, the problem such as ubiquity poor practicability in anti-fatigue-driving technology in prior art.
Summary of the invention
The invention provides a kind of method and system of anti-fatigue-driving, in order to solve the problem of the poor practicability existed in prior art.
The present invention adopts following technical scheme to realize:
A method for anti-fatigue-driving, is characterized in that, comprises the following steps:
1) the blood oxygen saturation primary signal under many group driver normal body condition is gathered;
2) multiple blood oxygen saturation is calculated after signal condition being carried out to the described blood oxygen saturation primary signal of many groups;
3) blood oxygen saturation average is calculated;
4) blood oxygen saturation threshold value is set according to described blood oxygen saturation average;
5) the blood oxygen saturation primary signal of driver described in Real-time Collection;
6) to Real-time Collection to described blood oxygen saturation primary signal carry out signal condition after calculate blood oxygen saturation, if Real-time Collection to described blood oxygen saturation continue lower than the described blood oxygen saturation threshold value predetermined very first time, then to warn described driver.
The method of described alerting drivers is one or more in following manner:
Seat vibrations, playing alert tones, reduction air-conditioner temperature.
Described blood oxygen saturation threshold value is 80% to 90% of described blood oxygen saturation average.
Also comprise:
1 ') the respiratory frequency primary signal under many group driver normal body condition is gathered;
2 ') multiple respiratory frequency is calculated after signal condition being carried out to the described respiratory frequency primary signal of many groups;
3 ') respiratory frequency average is calculated;
4 ') respiratory frequency threshold value is set according to described respiratory frequency average;
Described after according to described respiratory frequency average, respiratory frequency threshold value is set, also comprise;
5 ') Real-time Collection respiratory frequency primary signal;
6 ') to Real-time Collection to described respiratory frequency primary signal carry out signal condition after calculate respiratory frequency, if Real-time Collection to described respiratory frequency continue lower than the second predetermined time of described respiratory frequency threshold value, and Real-time Collection to described blood oxygen saturation continue lower than the described blood oxygen saturation threshold value predetermined very first time, then to warn described driver.
Described Real-time Collection to described respiratory frequency continue lower than the second predetermined time of described respiratory frequency threshold value, for:
Real-time Collection to exhalation time be greater than the twice of normal exhalation time and reach the number of times of setting; Or
Continue lower than the second predetermined time of described respiratory frequency threshold value according to the respiratory frequency that exhalation time and incoming call Time Calculation obtain.
A system for anti-fatigue-driving, this system comprises: steering wheel, reflective oximeter sensor, electronic control unit ECU and alarming device; Described electronic control unit ECU comprises: oxygen saturation signal modulate circuit and microprocessor;
Described reflective oximeter sensor, be positioned on steering wheel, be connected with the oxygen saturation signal modulate circuit in ECU, for organizing the blood oxygen saturation primary signal under driver's normal body condition in initial time collection more, and the blood oxygen saturation primary signal of driver described in Real-time Collection;
Described oxygen saturation signal modulate circuit, be positioned at ECU, be connected with reflective oximeter sensor, for carrying out signal condition to the described blood oxygen saturation primary signal of many groups, and to Real-time Collection to described blood oxygen saturation primary signal carry out signal condition;
Described microprocessor, is positioned at ECU, is connected with oxygen saturation signal modulate circuit, for calculating multiple blood oxygen saturation according to the oxygen saturation signal after conditioning; Calculate blood oxygen saturation average; According to described blood oxygen saturation average, blood oxygen saturation threshold value is set; And judge whether the described blood oxygen saturation that Real-time Collection arrives continues lower than the described blood oxygen saturation threshold value predetermined very first time;
Described alarming device, is connected with ECU, for Real-time Collection to described blood oxygen saturation continue lower than described blood oxygen saturation threshold value is predetermined the very first time time warn described driver.
Described alarming device is one or more of following devices:
Be positioned at the shaking device of seat inside, buzzer, air-conditioner temperature adjusting device.
Described reflective oximeter sensor has two, is symmetrically located at the both sides of described steering wheel.
Described oxygen saturation signal modulate circuit comprises signal comparator circuit, for the blood oxygen saturation primary signal selecting signal the strongest.
This system also comprises: thermistor (temperature) sensor; Described electronic control unit ECU also comprises: respiratory frequency signal conditioning circuit;
Described thermistor (temperature) sensor, be positioned at steering wheel hub position, be connected with the respiratory frequency signal conditioning circuit in ECU, for organizing the respiratory frequency primary signal under driver's normal body condition in initial time collection more, and the respiratory frequency primary signal of driver described in Real-time Collection;
Described respiratory frequency signal conditioning circuit, is positioned at ECU, is connected with thermistor (temperature) sensor, after carrying out signal condition to the described respiratory frequency primary signal of many groups, calculate multiple respiratory frequency; And to Real-time Collection to described respiratory frequency primary signal carry out signal condition after calculate respiratory frequency;
Described microprocessor, is positioned at ECU, is connected with respiratory frequency signal conditioning circuit, also for calculating multiple respiratory frequency according to the respiratory frequency signal after conditioning; Calculate respiratory frequency average; According to described respiratory frequency average, respiratory frequency threshold value is set; And judge whether the respiratory frequency that Real-time Collection arrives continues lower than the second predetermined time of respiratory frequency threshold value;
Described alarming device, be connected with ECU, for Real-time Collection to described respiratory frequency continue lower than the second predetermined time of described respiratory frequency threshold value and Real-time Collection to described blood oxygen saturation continue lower than described blood oxygen saturation threshold value is predetermined the very first time time warn described driver.
The invention provides a kind of method and system of anti-fatigue-driving, first reflective oximeter sensor collection driver blood oxygen saturation is under normal circumstances utilized, setting blood oxygen saturation threshold value, the blood oxygen saturation of Real-Time Monitoring driver again, in the blood oxygen saturation of driver lower than alerting drivers during blood oxygen saturation threshold value.Because reflective oximeter sensor is placed on steering wheel, the collection of blood oxygen saturation primary signal does not need electrode slice driver to feel not quite the thing and to dislike, therefore, practical.
Accompanying drawing explanation
The method flow schematic diagram of a kind of anti-fatigue-driving that Fig. 1 provides for the embodiment of the present invention one;
The system structure schematic diagram of a kind of anti-fatigue-driving that Fig. 2 provides for the embodiment of the present invention one.
Detailed description of the invention
The embodiment of the present invention first utilize reflective oximeter sensor collection driver blood oxygen saturation under normal circumstances, setting blood oxygen saturation threshold value, the blood oxygen saturation of Real-Time Monitoring driver again, driver blood oxygen saturation lower than setting blood oxygen saturation threshold value time alerting drivers.Because reflective oximeter sensor is placed on steering wheel, driver can not feel not quite the thing and dislike, therefore, practical.
In order to make technical problem solved by the invention, technical scheme and beneficial effect clearly understand, below in conjunction with drawings and Examples, the present invention is described in more detail.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
As shown in Figure 1, the method for a kind of anti-fatigue-driving that the embodiment of the present invention one provides, comprising:
Blood oxygen saturation primary signal under step 101, collection many groups driver normal body condition;
Step 102, signal condition is carried out to many group blood oxygen saturation primary signals after calculate multiple blood oxygen saturation;
Step 103, calculating blood oxygen saturation average;
Step 104, blood oxygen saturation threshold value is set according to blood oxygen saturation average;
The blood oxygen saturation primary signal of step 105, Real-time Collection driver;
Step 106, to Real-time Collection to blood oxygen saturation primary signal carry out signal condition after calculate blood oxygen saturation, if Real-time Collection to blood oxygen saturation continue lower than the blood oxygen saturation threshold value predetermined very first time, then alerting drivers.
Initial setting up of the present invention comprises step 101 to 104, needs gather different primary signals to different drivers and arrange threshold value during initial setting up, and storage threshold, such as driver A, after gathering primary signal, threshold value saves as A0, driver B, and after gathering primary signal, threshold value saves as B0.If A driver, be then set to A by driver information before activation.For individual variation, different threshold values is set.
Adopt reflective oximeter sensor, be placed on steering wheel, reflective oximeter sensor adopts high-brightness LED (LightEmittingDiode, light emitting diode) assembly as incident light source, adopts highly sensitive photodiode as photosensitive receiving element.LED component is packaged with 660nm red-light LED two, 940nm infrared light LED mono-.
LED component is driven by LED drive circuit, and because the specific rule of Bill-Bo Lang is only applicable to monochromatic light, therefore two LED share a photodiode, and LED drive circuit drives two LED successively.Wherein LED drive circuit and signal conditioning circuit, microprocessor are all positioned at ECU (ElectronicControlUnit, in electronic control unit).ECU, also known as " car running computer " or " vehicle-mounted computer " etc., is automobile specified microcomputerized controller, is also automobile specified single-chip microcomputer.It is the same with common single-chip microcomputer, is made up of microprocessor, memorizer, input/output interface, analog-digital converter and the large scale integrated circuit such as shaping, driving.
The concrete function of signal conditioning circuit is: the optical signal of collection is transformed into current signal by photodiode, current signal changes voltage signal into by I/V change-over circuit, voltage signal comprises DC component and AC compounent, extract AC compounent and amplify, import microprocessor into after amplification, calculate blood oxygen saturation by microprocessor.
Microprocessor calculates and organizes blood oxygen saturation more, gets the normal oximetry value that its average is this driver.Preferably, blood oxygen saturation threshold value is 80% to 90% of blood oxygen saturation average.
Preferably, the method for alerting drivers is one or more in following manner:
Seat vibrations, playing alert tones, reduction air-conditioner temperature.
Wherein be positioned at the shaking device of seat inside, buzzer, air-conditioner temperature adjusting device be all connected with ECU.
Preferably, the oxygen saturation signal Acquire and process of driver, also comprises simultaneously:
Step 101 ', the respiratory frequency primary signal gathered under many group driver normal body condition;
Step 102 ', signal condition is carried out to many group respiratory frequency primary signals after calculate multiple respiratory frequency;
Step 103 ', calculate respiratory frequency average;
Step 104 ', according to respiratory frequency average, respiratory frequency threshold value is set;
Step 105 ', Real-time Collection respiratory frequency primary signal;
Step 106 ', to Real-time Collection to respiratory frequency primary signal carry out signal condition after calculate respiratory frequency, if Real-time Collection to respiratory frequency continue lower than the second predetermined time of respiratory frequency threshold value, and Real-time Collection to blood oxygen saturation continue lower than the blood oxygen saturation threshold value predetermined very first time, then alerting drivers.
Thermistor (temperature) sensor is that a kind of resistance value varies with temperature and the electronic device changed.Pass through constant current source power supply, the change frequency of resistance value is identical with the change frequency of voltage swing within a certain period of time, and the change of resistance value is caused by the change of ambient temperature, and the extraneous variations in temperature among a small circle of resistance is caused by the temperature contrast of human body institute's breath and outside air, so a primary voltage change resistance change is also a variations in temperature simultaneously, namely people exhales, inhale respectively once, namely the incoming call time adds that exhalation time is each once, therefore the change frequency of recording voltage is only needed just can to obtain frequency of respiration, then just respiratory frequency is obtained divided by the time.The primary signal of respiratory frequency is roughly sine wave.
The first setting of respiratory frequency, i.e. step 101 ' to 104 ' identical with the initial setting up of blood oxygen saturation, no longer repeat herein.Respiratory frequency can carry out initial value setting with blood oxygen saturation simultaneously, also can first arrange a certain item.Real-time Collection is for gather simultaneously.Preferably, the threshold value of respiratory frequency and the threshold value of blood oxygen saturation are set to one group of numerical value, such as driver A, and blood oxygen saturation threshold value saves as A0, and respiratory frequency threshold value saves as A1, then the threshold value of driver A is [A0, A1].
Respiratory frequen is positioned on the upside of steering wheel hub position, and the air-flow of breathing out when driver drives can directly be beaten on respiratory frequen, is convenient to acquired signal.
The signal conditioning circuit of respiratory frequency is slightly different from the signal conditioning circuit of blood oxygen transducer, be specially: collection sine wave is converted to square wave through signal amplification circuit amplification, filter circuit filtering, waveform changing circuit by the respiratory frequency primary signal collected by respiratory frequen, transfer analogue signal to digital signal finally by A/D conversion and pass to microprocessor.
To Real-time Collection to respiratory frequency primary signal carry out signal condition after calculate respiratory frequency by microprocessor, if Real-time Collection to respiratory frequency continue lower than the second predetermined time of respiratory frequency threshold value, such as 5 minutes, or 10 minutes, and Real-time Collection to blood oxygen saturation continue lower than the blood oxygen saturation threshold value predetermined very first time, such as 15 minutes, then alerting drivers.The very first time can be identical with the second time, also can not be identical.
Preferably, Real-time Collection to respiratory frequency continue lower than the second predetermined time of respiratory frequency threshold value, for:
Real-time Collection to exhalation time be greater than the twice of normal exhalation time and reach the number of times of setting; Or
Continue lower than the second predetermined time of respiratory frequency threshold value according to the respiratory frequency that exhalation time and incoming call Time Calculation obtain.
The respiratory frequency signal that microprocessor is collected, calculate the average duration of the exhalation time under normal body condition, such as 3 seconds, if a certain exhalation time is 6.4 seconds, then driver may yawn, if the number of times of setting continuously, as 4 times, exhalation time, all more than 6 seconds, illustrates that driver is yawning always, and now driver is fatigue state.Such as, or microprocessor calculates respiratory frequency, and, the respiratory frequency under normal body condition is 20 hertz, if as 2 minutes in the second predetermined time, respiratory frequency becomes 13 hertz, and driver's physical fatigue is described.
The invention provides a kind of method and system of anti-fatigue-driving, first reflective oximeter sensor collection driver blood oxygen saturation is under normal circumstances utilized, setting blood oxygen saturation threshold value, the blood oxygen saturation of Real-Time Monitoring driver again, in the blood oxygen saturation of driver lower than alerting drivers during blood oxygen saturation threshold value.Because reflective oximeter sensor is placed on steering wheel, the collection of blood oxygen saturation primary signal does not need electrode slice, and driver can not feel not quite the thing and dislike, therefore, practical.For determining the fatigue state of driver, be separately provided with respiratory frequen, the alerting drivers when the respiratory frequency of driver and blood oxygen saturation all represent fatigue state, thus improve the reliability of driver fatigue state identification.
For said method flow process, the embodiment of the present invention also provides a kind of system of anti-fatigue-driving, and the particular content of system can be implemented with reference to said method, does not repeat them here.
As shown in Figure 2, the system of a kind of anti-fatigue-driving that the embodiment of the present invention two provides, this system comprises: steering wheel 201, reflective oximeter sensor 202, electronic control unit ECU203, alarming device 204; Electronic control unit ECU comprises: oxygen saturation signal modulate circuit 205, microprocessor 206;
Reflective oximeter sensor 202, be positioned on steering wheel 201, be connected with the oxygen saturation signal modulate circuit 205 in ECU203, for organizing the blood oxygen saturation primary signal under driver's normal body condition in initial time collection more, and the blood oxygen saturation primary signal of Real-time Collection driver;
Oxygen saturation signal modulate circuit 205, is positioned at ECU203, is connected with reflective oximeter sensor 202, for carrying out signal condition to many group blood oxygen saturation primary signals, and to Real-time Collection to blood oxygen saturation primary signal carry out signal condition;
Microprocessor 206, is positioned at ECU203, is connected with oxygen saturation signal modulate circuit 205, for calculating multiple blood oxygen saturation according to the oxygen saturation signal after conditioning; Calculate blood oxygen saturation average; According to blood oxygen saturation average, blood oxygen saturation threshold value is set; And judge whether the blood oxygen saturation that Real-time Collection arrives continues lower than the blood oxygen saturation threshold value predetermined very first time;
Alarming device 204, is connected with ECU203, for Real-time Collection to blood oxygen saturation continue lower than blood oxygen saturation threshold value is predetermined the very first time time alerting drivers.
Preferably, alarming device 204 is one or more of following devices:
Be positioned at the shaking device of seat inside, buzzer, air-conditioner temperature adjusting device.
Preferably, reflective oximeter sensor 202 has two, is symmetrically located at the both sides of steering wheel 201.
Preferably, oxygen saturation signal modulate circuit 205 comprises signal comparator circuit 209, for the blood oxygen saturation primary signal selecting signal the strongest.
Signal comparator circuit 209 selects the stronger primary signal of signal, prevents from not collecting signal during driver's one hand drive.
Preferably, device for resisting fatigue driving also comprises: thermistor (temperature) sensor 207; Electronic control unit ECU203 comprises: respiratory frequency signal conditioning circuit 208;
Thermistor (temperature) sensor 207, be positioned at steering wheel 201 center, be connected with the respiratory frequency signal conditioning circuit 208 in ECU203, for organizing the respiratory frequency primary signal under driver's normal body condition in initial time collection more, and the respiratory frequency primary signal of Real-time Collection driver;
Respiratory frequency signal conditioning circuit 208, is positioned at ECU203, is connected with thermistor (temperature) sensor 207, after carrying out signal condition to many group respiratory frequency primary signals, calculate multiple respiratory frequency; And to Real-time Collection to respiratory frequency primary signal carry out signal condition after calculate respiratory frequency;
Microprocessor 206, is positioned at ECU203, is connected with respiratory frequency signal conditioning circuit 208, also for calculating multiple respiratory frequency according to the respiratory frequency signal after conditioning; Calculate respiratory frequency average; According to respiratory frequency average, respiratory frequency threshold value is set; And judge whether the respiratory frequency that Real-time Collection arrives continued lower than the second predetermined time of respiratory frequency threshold value.
Alarming device 204, is connected with ECU203, for Real-time Collection to respiratory frequency continue lower than the second predetermined time of respiratory frequency threshold value and Real-time Collection to blood oxygen saturation continue lower than blood oxygen saturation threshold value is predetermined the very first time time alerting drivers.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (10)
1. a method for anti-fatigue-driving, is characterized in that, comprises the following steps:
1) the blood oxygen saturation primary signal under many group driver normal body condition is gathered;
2) multiple blood oxygen saturation is calculated after signal condition being carried out to the described blood oxygen saturation primary signal of many groups;
3) blood oxygen saturation average is calculated;
4) blood oxygen saturation threshold value is set according to described blood oxygen saturation average;
5) the blood oxygen saturation primary signal of driver described in Real-time Collection;
6) to Real-time Collection to described blood oxygen saturation primary signal carry out signal condition after calculate blood oxygen saturation, if Real-time Collection to described blood oxygen saturation continue lower than the described blood oxygen saturation threshold value predetermined very first time, then to warn described driver.
2. the method for claim 1, is characterized in that, the method for described alerting drivers is one or more in following manner:
Seat vibrations, playing alert tones, reduction air-conditioner temperature.
3. the method for claim 1, is characterized in that,
Described blood oxygen saturation threshold value is 80% to 90% of described blood oxygen saturation average.
4. the method for claim 1, is characterized in that, also comprises:
1 ') the respiratory frequency primary signal under many group driver normal body condition is gathered;
2 ') multiple respiratory frequency is calculated after signal condition being carried out to the described respiratory frequency primary signal of many groups;
3 ') respiratory frequency average is calculated;
4 ') respiratory frequency threshold value is set according to described respiratory frequency average;
Described after according to described respiratory frequency average, respiratory frequency threshold value is set, also comprise;
5 ') Real-time Collection respiratory frequency primary signal;
6 ') to Real-time Collection to described respiratory frequency primary signal carry out signal condition after calculate respiratory frequency, if Real-time Collection to described respiratory frequency continue lower than the second predetermined time of described respiratory frequency threshold value, and Real-time Collection to described blood oxygen saturation continue lower than the described blood oxygen saturation threshold value predetermined very first time, then to warn described driver.
5. method as claimed in claim 4, is characterized in that, described Real-time Collection to described respiratory frequency continue lower than the second predetermined time of described respiratory frequency threshold value, for:
Real-time Collection to exhalation time be greater than the twice of normal exhalation time and reach the number of times of setting; Or
Continue lower than the second predetermined time of described respiratory frequency threshold value according to the respiratory frequency that exhalation time and incoming call Time Calculation obtain.
6. a system for anti-fatigue-driving, is characterized in that, this system comprises: steering wheel, reflective oximeter sensor, electronic control unit ECU and alarming device; Described electronic control unit ECU comprises: oxygen saturation signal modulate circuit and microprocessor;
Described reflective oximeter sensor, be positioned on steering wheel, be connected with the oxygen saturation signal modulate circuit in ECU, for organizing the blood oxygen saturation primary signal under driver's normal body condition in initial time collection more, and the blood oxygen saturation primary signal of driver described in Real-time Collection;
Described oxygen saturation signal modulate circuit, be positioned at ECU, be connected with reflective oximeter sensor, for carrying out signal condition to the described blood oxygen saturation primary signal of many groups, and to Real-time Collection to described blood oxygen saturation primary signal carry out signal condition;
Described microprocessor, is positioned at ECU, is connected with oxygen saturation signal modulate circuit, for calculating multiple blood oxygen saturation according to the oxygen saturation signal after conditioning; Calculate blood oxygen saturation average; According to described blood oxygen saturation average, blood oxygen saturation threshold value is set; And judge whether the described blood oxygen saturation that Real-time Collection arrives continues lower than the described blood oxygen saturation threshold value predetermined very first time;
Described alarming device, is connected with ECU, for Real-time Collection to described blood oxygen saturation continue lower than described blood oxygen saturation threshold value is predetermined the very first time time warn described driver.
7. system as claimed in claim 6, is characterized in that, described alarming device is one or more of following devices:
Be positioned at the shaking device of seat inside, buzzer, air-conditioner temperature adjusting device.
8. system as claimed in claim 6, is characterized in that,
Described reflective oximeter sensor has two, is symmetrically located at the both sides of described steering wheel.
9. system as claimed in claim 6, is characterized in that,
Described oxygen saturation signal modulate circuit comprises signal comparator circuit, for the blood oxygen saturation primary signal selecting signal the strongest.
10. system as claimed in claim 6, it is characterized in that, this system also comprises: thermistor (temperature) sensor; Described electronic control unit ECU also comprises: respiratory frequency signal conditioning circuit;
Described thermistor (temperature) sensor, be positioned at steering wheel hub position, be connected with the respiratory frequency signal conditioning circuit in ECU, for organizing the respiratory frequency primary signal under driver's normal body condition in initial time collection more, and the respiratory frequency primary signal of driver described in Real-time Collection;
Described respiratory frequency signal conditioning circuit, is positioned at ECU, is connected with thermistor (temperature) sensor, after carrying out signal condition to the described respiratory frequency primary signal of many groups, calculate multiple respiratory frequency; And to Real-time Collection to described respiratory frequency primary signal carry out signal condition after calculate respiratory frequency;
Described microprocessor, is positioned at ECU, is connected with respiratory frequency signal conditioning circuit, also for calculating multiple respiratory frequency according to the respiratory frequency signal after conditioning; Calculate respiratory frequency average; According to described respiratory frequency average, respiratory frequency threshold value is set; And judge whether the respiratory frequency that Real-time Collection arrives continues lower than the second predetermined time of respiratory frequency threshold value;
Described alarming device, be connected with ECU, for Real-time Collection to described respiratory frequency continue lower than the second predetermined time of described respiratory frequency threshold value and Real-time Collection to described blood oxygen saturation continue lower than described blood oxygen saturation threshold value is predetermined the very first time time warn described driver.
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| CN107028391A (en) * | 2017-06-05 | 2017-08-11 | 浙江陀曼精密机械有限公司 | A kind of anti-overwork health seat |
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| CN113116344B (en) * | 2020-01-16 | 2022-12-27 | 华为技术有限公司 | Blood oxygen monitoring method, medium and system based on electronic equipment |
| WO2021214353A1 (en) * | 2020-04-20 | 2021-10-28 | G&F Hispania Medical Group, S.L.P. | Multifunctional therapy system for concentrated oxygen delivery, intended for vehicles |
| CN112489369A (en) * | 2020-11-06 | 2021-03-12 | 安徽盛瑞科技有限公司 | Anti-doze alarm device suitable for vehicle-mounted navigation system and use method |
| CN112489369B (en) * | 2020-11-06 | 2022-07-05 | 安徽盛瑞科技有限公司 | Anti-doze alarm device suitable for vehicle-mounted navigation system and use method |
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