CN114469035A - Anti-driving fatigue safety auxiliary system and method - Google Patents
Anti-driving fatigue safety auxiliary system and method Download PDFInfo
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- CN114469035A CN114469035A CN202210007052.6A CN202210007052A CN114469035A CN 114469035 A CN114469035 A CN 114469035A CN 202210007052 A CN202210007052 A CN 202210007052A CN 114469035 A CN114469035 A CN 114469035A
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- 238000000034 method Methods 0.000 title claims abstract description 68
- 230000000638 stimulation Effects 0.000 claims abstract description 331
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- 238000004364 calculation method Methods 0.000 claims abstract description 28
- 230000008569 process Effects 0.000 claims abstract description 20
- 230000002265 prevention Effects 0.000 claims description 24
- 230000003247 decreasing effect Effects 0.000 claims description 3
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- 238000005424 photoluminescence Methods 0.000 claims 1
- 238000013186 photoplethysmography Methods 0.000 abstract description 113
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- 230000002929 anti-fatigue Effects 0.000 abstract description 5
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
- A61B5/024—Detecting, measuring or recording pulse rate or heart rate
- A61B5/02416—Detecting, measuring or recording pulse rate or heart rate using photoplethysmograph signals, e.g. generated by infrared radiation
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
- A61B5/024—Detecting, measuring or recording pulse rate or heart rate
- A61B5/02405—Determining heart rate variability
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- A—HUMAN NECESSITIES
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- A61B5/16—Devices for psychotechnics; Testing reaction times ; Devices for evaluating the psychological state
- A61B5/18—Devices for psychotechnics; Testing reaction times ; Devices for evaluating the psychological state for vehicle drivers or machine operators
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- A61B5/74—Details of notification to user or communication with user or patient ; user input means
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- A—HUMAN NECESSITIES
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- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M21/00—Other devices or methods to cause a change in the state of consciousness; Devices for producing or ending sleep by mechanical, optical, or acoustical means, e.g. for hypnosis
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- A61M21/00—Other devices or methods to cause a change in the state of consciousness; Devices for producing or ending sleep by mechanical, optical, or acoustical means, e.g. for hypnosis
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- A61M2021/0072—Other devices or methods to cause a change in the state of consciousness; Devices for producing or ending sleep by mechanical, optical, or acoustical means, e.g. for hypnosis by the use of a particular sense, or stimulus with application of electrical currents
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Abstract
The embodiment of the invention provides an anti-driving fatigue safety auxiliary system and a method, wherein the system comprises a PPG (photoplethysmography) measuring module, a calculation and control module and an electric stimulation module which are arranged on a steering wheel, wherein the PPG measuring module is used for acquiring PPG signals of a human body; the calculation and control module is used for obtaining a fatigue degree index according to the PPG signal of the human body, and calculating a stimulation parameter in the electrical stimulation process when the fatigue degree index is larger than a preset first threshold value; the electrical stimulation module is used for implementing electrical stimulation according to the stimulation parameters. The embodiment of the invention realizes a closed-loop system integrating fatigue measurement and anti-fatigue intervention, and the stimulation parameters are calculated according to the fatigue measurement result, so that the adaptability to different people is improved, and the intervention efficiency and effect are improved; fatigue degree indexes are obtained through PPG measurement of a human body, and electric stimulation is carried out after fatigue is detected to carry out anti-fatigue intervention, so that the driving safety is improved; the steering wheel is small and convenient, does not need complex equipment and can be arranged on the steering wheel in a rear mounting mode.
Description
Technical Field
The embodiment of the invention relates to a safety auxiliary system and a safety auxiliary method for resisting driving fatigue.
Background
Fatigue driving is one of the important causes of traffic accidents. Therefore, many models of automobiles are equipped with a fatigue driving monitoring system to monitor the fatigue state of the driver.
The existing fatigue driving monitoring system mainly has two modes of direct monitoring and indirect monitoring when monitoring the fatigue state. The direct monitoring mode is mainly used for monitoring the fatigue state by collecting signals directly representing the fatigue state of a driver, such as facial movement, eye movement, electroencephalogram and the like of the driver, and the measuring modes are complex in sensing system, need to be pre-installed when an automobile is designed and cannot be post-installed. The indirect monitoring method, which uses the driving behavior signal and combines the vehicle state signal, and analyzes the state of the driver by methods such as statistical analysis and machine learning, is not as accurate as the direct monitoring method.
When the existing fatigue driving monitoring system monitors that a driver is in a fatigue driving state, the existing fatigue driving monitoring system adopts sound alarm to prevent fatigue driving and improve safety, and the problem of alertness reduction of fatigue driving cannot be eliminated or alleviated.
Disclosure of Invention
In order to solve the problems in the prior art, embodiments of the present invention provide a safety assistance system and method for resisting driving fatigue.
The embodiment of the invention provides an anti-driving fatigue safety auxiliary system, which comprises a PPG measuring module, a calculating and controlling module and an electrical stimulation module, wherein the PPG measuring module, the calculating and controlling module and the electrical stimulation module are arranged on a steering wheel, and the PPG measuring module, the calculating and controlling module and the electrical stimulation module are arranged on the steering wheel, wherein: the PPG measuring module is used for acquiring a human body PPG signal and sending the human body PPG signal to the calculating and controlling module; the calculation and control module is used for receiving the human body PPG signal, obtaining a fatigue degree index according to the human body PPG signal, calculating a stimulation parameter in an electrical stimulation process when the fatigue degree index is larger than a preset first threshold value, and sending the stimulation parameter to the electrical stimulation module; and the electrical stimulation module is used for receiving the stimulation parameters and implementing electrical stimulation according to the stimulation parameters.
According to the safety auxiliary system for resisting driving fatigue provided by the embodiment of the invention, when the PPG measuring module is used for acquiring a PPG signal of a human body, the PPG measuring module is specifically used for: a reflection type PPG sensor is adopted to acquire a PPG signal of a human body.
According to the safety auxiliary system for resisting driving fatigue provided by the embodiment of the invention, when the PPG measuring module is used for acquiring a PPG signal of a human body, the PPG measuring module is specifically used for: the human body PPG signal is acquired through a hand part in contact with the PPG measuring module.
According to the safety auxiliary system for resisting driving fatigue, provided by the embodiment of the invention, the electrical stimulation module comprises a stimulation electrode; when the electrical stimulation module is used for implementing electrical stimulation according to the stimulation parameters, the electrical stimulation module is specifically used for: and performing electrical stimulation on the hand part contacted with the stimulation electrode according to the stimulation parameters.
According to the driving fatigue prevention safety auxiliary system provided by the embodiment of the invention, when the calculation and control module is used for calculating the stimulation parameters of the electrical stimulation process, the calculation and control module is specifically used for: obtaining the corresponding stimulation parameters according to the degree that the fatigue degree index is greater than the preset first threshold; wherein the stimulation parameters include at least a current waveform and a current intensity of the stimulation current; when the electrical stimulation module is used for implementing electrical stimulation according to the stimulation parameters, the electrical stimulation module is specifically used for: by measuring and controlling the stimulation current, the stimulation current is made to satisfy the current waveform, and the average current or the maximum current of the stimulation current is made to stabilize on the current intensity.
According to the safety auxiliary system for resisting driving fatigue provided by the embodiment of the invention, the calculation and control module is further used for: obtaining stimulation time according to the degree that the fatigue degree index is greater than the preset first threshold, and sending the stimulation time to the electrical stimulation module; the electrical stimulation module is also used for receiving the stimulation time and implementing electrical stimulation according to the stimulation time.
According to the safety auxiliary system for resisting driving fatigue provided by the embodiment of the invention, the calculation and control module is further used for: transmitting the fatigue degree index to the electrical stimulation module in real time; the electrical stimulation module is further configured to: automatically stopping electrical stimulation in response to the fatigue level index decreasing to less than or equal to a preset second threshold for a preset time.
According to the safety auxiliary system for resisting driving fatigue provided by the embodiment of the invention, the system further comprises a working mode adjusting module, and the working mode adjusting module is used for: adjusting the working mode between the current feedback intervention mode and the direct intervention mode; wherein, in the direct intervention mode, the electrical stimulation module directly performs electrical stimulation.
According to the driving fatigue prevention safety auxiliary system provided by the embodiment of the invention, the system further comprises a fixing device, and the fixing device is used for fixing the PPG measuring module, the calculating and controlling module and the electric stimulation module on a steering wheel.
The embodiment of the invention also provides a safe auxiliary method for resisting driving fatigue, which comprises the following steps: acquiring a human body PPG signal acquired by a PPG measurement module; and obtaining a fatigue degree index according to the PPG signal of the human body, calculating a stimulation parameter in an electrical stimulation process when the fatigue degree index is larger than a preset first threshold value, and sending the stimulation parameter to an electrical stimulation module so that the electrical stimulation module carries out electrical stimulation according to the stimulation parameter.
The embodiment of the present invention further provides an electronic device, which includes a memory, a processor, and a computer program stored in the memory and capable of running on the processor, wherein the processor implements any of the steps of the above-mentioned driving fatigue prevention safety assistance method when executing the program.
Embodiments of the present invention further provide a non-transitory computer readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the driving fatigue safety assistance method according to any one of the above.
An embodiment of the present invention further provides a computer program product, which includes a computer program, and when the computer program is executed by a processor, the steps of the above-mentioned driving fatigue prevention safety assistance method are implemented.
According to the driving fatigue resistance safety auxiliary system and the driving fatigue resistance safety auxiliary method, the human body PPG signal is collected, the fatigue degree index is obtained according to the human body PPG signal, when the fatigue degree index is larger than a preset first threshold value, the stimulation parameter of the electrical stimulation process is calculated, electrical stimulation is carried out according to the stimulation parameter, a closed loop system integrating fatigue measurement and fatigue resistance intervention is achieved, the stimulation parameter is calculated according to the fatigue measurement result, the adaptability to different people is improved, and the intervention efficiency and effect are improved; fatigue degree indexes are obtained through PPG measurement of a human body, and electric stimulation is carried out after fatigue is detected to carry out anti-fatigue intervention, so that the driving safety is improved; the steering wheel is small and convenient, does not need complex equipment and can be arranged on the steering wheel in a rear mounting mode.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a driving fatigue prevention safety assistance system provided by an embodiment of the invention;
FIG. 2 is a schematic flow chart of a driving fatigue prevention safety assistance method provided by an embodiment of the invention;
fig. 3 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a schematic structural diagram of a driving fatigue prevention safety assistance system according to an embodiment of the present invention. As shown in fig. 1, the system includes a PPG measurement module 1 mounted on a steering wheel, a calculation and control module 2, and an electrical stimulation module 3, wherein: the PPG measuring module 1 is used for acquiring a human body PPG signal and sending the human body PPG signal to the calculating and controlling module 2; the calculation and control module 2 is configured to receive the human PPG signal, obtain a fatigue degree index according to the human PPG signal, calculate a stimulation parameter during an electrical stimulation process when the fatigue degree index is greater than a preset first threshold, and send the stimulation parameter to the electrical stimulation module 3; and the electrical stimulation module 3 is used for receiving the stimulation parameters and implementing electrical stimulation according to the stimulation parameters.
The embodiment of the invention provides a small and exquisite driving fatigue resistant safety auxiliary system which can be directly installed on a steering wheel. The system comprises a PPG measuring module 1, a calculating and controlling module 2 and an electric stimulation module 3 which are arranged on a steering wheel.
The PPG measurement module 1 is used to collect a PPG signal from a human body, which may be a PPG signal obtained by measuring the hands of a driver, and sends the PPG signal to the calculation and control module 2. The PPG (photoplethysmography) is based on an LED light source and a detector, and can measure attenuated light reflected and absorbed by blood vessels and tissues of a human body, record the pulsation state of the blood vessels, and measure pulse waves.
The calculation and control module 2 is used for receiving the human PPG signal, obtaining an index reflecting the fatigue degree according to the human PPG signal, and obtaining a fatigue degree index according to the index reflecting the fatigue degree. The indicator reflecting the degree of fatigue may be, for example, an indicator of the heart health of the person. The human cardiac health indicator may be, for example, a preset heart rate variability indicator. The Heart Rate Variability (HRV) refers to the variation of the difference of successive Heart cycles, and can reflect the fatigue degree of a person. The heart rate variability has a plurality of indexes, and any one of the indexes can be selected as a fatigue degree index, or a combination of the indexes is selected to calculate the fatigue degree index, for example, the fatigue degree index is obtained by weighting and summing the results of the selected HRV indexes.
When the fatigue degree index is greater than a preset first threshold, calculating stimulation parameters of the electrical stimulation process, such as current magnitude, current frequency, pulse width and the like in a pulse stimulation mode, amplitude, frequency and the like in sine wave stimulation, and sending the stimulation parameters to the electrical stimulation module 3. When the fatigue degree index is greater than the preset first threshold, the calculation and control module 2 may acquire a set of default stimulation parameters and send the set of default stimulation parameters to the electrical stimulation module 3.
After the electrical stimulation module 3 receives the stimulation parameters, electrical stimulation is carried out on the contacted human body part according to the received stimulation parameters. The stimulation time for performing electrical stimulation may be a default stimulation time. After receiving the electric stimulation, the human body becomes clear-headed and improves alertness.
According to the driving fatigue resistance safety auxiliary system provided by the embodiment of the invention, a human body PPG signal is acquired, a fatigue degree index is obtained according to the human body PPG signal, when the fatigue degree index is larger than a preset first threshold value, a stimulation parameter in an electrical stimulation process is calculated, electrical stimulation is carried out according to the stimulation parameter, a closed loop system integrating fatigue measurement and fatigue resistance intervention is realized, the stimulation parameter is calculated according to a fatigue measurement result, the adaptability to different people is improved, and the intervention efficiency and effect are improved; fatigue degree indexes are obtained through PPG measurement of a human body, and electric stimulation is carried out after fatigue is detected to carry out anti-fatigue intervention, so that the driving safety is improved; the steering wheel is small and convenient, does not need complex equipment and can be arranged on the steering wheel in a rear mounting mode.
According to the safety auxiliary system for resisting driving fatigue provided by the embodiment of the invention, when the PPG measuring module 1 is used for collecting a PPG signal of a human body, the PPG measuring module is specifically used for: a reflection type PPG sensor is adopted to acquire a PPG signal of a human body.
Both reflective and transmissive PPG sensors may be applied to the measurement of the PPG signal of the human body in the present invention. But based on the characteristics of holding the steering wheel when driving, adopt reflection-type PPG sensor only need can realize measuring with a surface contact of hand for the structure is smaller and more exquisite, and it is more convenient to use.
According to the driving fatigue resistant safety auxiliary system provided by the embodiment of the invention, the reflection type PPG sensor is adopted to measure the PPG signal of the human body, so that the structure is smaller and more convenient to use.
According to the safety auxiliary system for resisting driving fatigue provided by the embodiment of the invention, when the PPG measurement module 1 is used for acquiring PPG signals of a human body, the PPG measurement module is specifically used for: the human body PPG signal is acquired through a hand part in contact with the PPG measuring module 1.
When the PPG measuring module collects the PPG signal of the human body, the hand part in contact with the PPG measuring module collects the PPG signal of the human body. The PPG measurement module and the hand part (such as palm or finger) can realize measurement through direct contact or indirect contact. Other modules of the anti-driving fatigue safety assistance system, such as a housing, may be present in indirect contact, such as between the PPG measurement module and the hands.
According to the driving fatigue prevention safety auxiliary system provided by the embodiment of the invention, the hand part in contact with the PPG measuring module is used for collecting the PPG signal of the human body, so that the convenient collection of the PPG signal of the human body is realized.
According to the safety auxiliary system for resisting driving fatigue provided by the embodiment of the invention, the electrical stimulation module 3 comprises a stimulation electrode; when the electrical stimulation module 3 is used for implementing electrical stimulation according to the stimulation parameters, it is specifically configured to: and performing electrical stimulation on the hand part contacted with the stimulation electrode according to the stimulation parameters.
The electrical stimulation module 3 may perform electrical stimulation through the stimulation electrodes. When the driver holds the steering wheel, the hand of the driver is in contact with the stimulation electrode of the electrical stimulation module 3. The electric stimulation module 3 carries out electric stimulation on the hand part contacted with the stimulation electrode through the stimulation electrode. Wherein, the stimulation electrode realizes the electric stimulation to the hand part (such as palm or finger) through direct contact or indirect contact. Other modules of the anti-driving fatigue safety assistance system, such as a housing, may be present in indirect contact, such as between the stimulation electrode and the hand.
The number of electrodes of the electrostimulation module 3 may be 1, 2 or more. However, 1 electrode is complex to realize, and a plurality of electrodes are not needed, so that the electric stimulation module 3 can adopt 2 electrodes, a certain voltage waveform is output between the 2 electrodes, and the current can stimulate tired people to be awake, thereby realizing the simplification of the structure on the basis of meeting the functional requirements.
In order to make the structure more reasonable, when in use, the PPG measuring module 1 can be contacted with the palm, and the 2 electrodes are contacted with the fingers; or the PGG measuring module 1 is in contact with the finger and the 2 electrodes are in contact with the palm.
According to the driving fatigue prevention safety auxiliary system provided by the embodiment of the invention, the hand part in contact with the stimulation electrode is subjected to electric stimulation according to the stimulation parameters, so that the convenient implementation of the electric stimulation is realized.
According to the driving fatigue prevention safety auxiliary system provided by the embodiment of the invention, when the calculation and control module 2 is used for calculating the stimulation parameters of the electrical stimulation process, the calculation and control module is specifically used for: obtaining the corresponding stimulation parameters according to the degree that the fatigue degree index is greater than the preset first threshold; wherein the stimulation parameters include at least a current waveform and a current intensity of the stimulation current; when the electrical stimulation module is used for implementing electrical stimulation according to the stimulation parameters, the electrical stimulation module is specifically used for: by measuring and controlling the stimulation current, the stimulation current is made to satisfy the current waveform, and the average current or the maximum current of the stimulation current is made to stabilize on the current intensity.
And when the fatigue degree index is larger than a preset first threshold value, the calculation and control module 2 calculates stimulation parameters in the electrical stimulation process. The calculation and control module 2 may obtain a suitable stimulation parameter according to the degree that the fatigue degree index is greater than the preset first threshold value, so as to implement electrical stimulation of different strengths according to different fatigue degrees. For example, a plurality of sets of stimulation parameters may be preset, and the stimulation parameters respectively correspond to the value ranges of different fatigue degree indexes. And after the fatigue degree index is obtained, acquiring a corresponding stimulation parameter according to the value range of the fatigue degree index. The stimulation parameters include at least a current waveform and a current intensity of the stimulation current.
The electrical stimulation module 3 can measure and control the current, and when the electrical stimulation module 3 is used for implementing electrical stimulation according to the stimulation parameters, the stimulation current meets the current waveform in the stimulation parameters by measuring and controlling the stimulation current, and the average current or the maximum current of the stimulation current is stabilized on the current intensity in the stimulation parameters.
According to the driving fatigue resistant safety auxiliary system provided by the embodiment of the invention, the corresponding stimulation parameters are obtained according to the degree that the fatigue degree index is greater than the preset first threshold, and by controlling the current waveform and the current intensity, the differential electrical stimulation is implemented according to different fatigue degrees, so that the adaptability to different fatigue degrees of the same person is improved.
According to the safety auxiliary system for resisting driving fatigue provided by the embodiment of the invention, the calculation and control module 2 is further used for: obtaining stimulation time according to the degree that the fatigue degree index is greater than the preset first threshold value, and sending the stimulation time to the electrical stimulation module 3; the electrical stimulation module 3 is further configured to receive the stimulation time and perform electrical stimulation according to the stimulation time.
For different fatigue degrees, corresponding stimulation time can be acquired, and electrical stimulation is carried out according to the corresponding stimulation time.
After the calculation and control module 2 obtains the fatigue degree index according to the PPG signal of the human body, the corresponding stimulation time is obtained according to the degree that the fatigue degree index is larger than a preset first threshold value, and the stimulation time is sent to the electrical stimulation module 3. The electrical stimulation module 3 receives the stimulation time, and performs electrical stimulation according to the default stimulation parameters and the stimulation time.
Or, after obtaining the fatigue degree index according to the PPG signal of the human body, the calculation and control module 2 obtains the corresponding stimulation time and stimulation parameter according to the degree that the fatigue degree index is greater than the preset first threshold, and sends the stimulation time and stimulation parameter to the electrical stimulation module 3. The electrical stimulation module 3 receives the stimulation time and the stimulation parameters, and performs electrical stimulation according to the received stimulation parameters and the stimulation time.
According to the driving fatigue resistant safety auxiliary system provided by the embodiment of the invention, the stimulation time is obtained according to the degree that the fatigue degree index is greater than the preset first threshold value, and the electrical stimulation is implemented according to the stimulation time, so that the differential electrical stimulation is further implemented according to different fatigue degrees, and the adaptability to different fatigue degrees of the same person is improved.
According to the safety auxiliary system for resisting driving fatigue provided by the embodiment of the invention, the calculation and control module 2 is further used for: transmitting the fatigue degree index to the electrical stimulation module 3 in real time; the electrostimulation module 3 is also configured to: automatically stopping electrical stimulation in response to the fatigue level index decreasing to less than or equal to a preset second threshold for a preset time.
After the calculation and control module 2 obtains the fatigue degree index according to the PPG signal of the human body, the obtained fatigue degree index can be transmitted to the electrical stimulation module 3 in real time. When the electrical stimulation module 3 performs electrical stimulation according to the stimulation parameters, the change of the fatigue degree index can be monitored, and if the fatigue degree index is reduced to be less than or equal to a preset second threshold value for a preset time, the electrical stimulation is automatically stopped.
According to the driving fatigue prevention safety auxiliary system provided by the embodiment of the invention, the timing for stopping the electric stimulation is determined according to the change condition of the fatigue degree index, so that the effect of the electric stimulation is ensured.
According to the safety auxiliary system for resisting driving fatigue provided by the embodiment of the invention, the system further comprises a working mode adjusting module, and the working mode adjusting module is used for: adjusting the working mode between the current feedback intervention mode and the direct intervention mode; wherein, in the direct intervention mode, the electrical stimulation module directly administers electrical stimulation.
The anti-driving fatigue safety auxiliary system can be provided with two working modes, namely a feedback intervention mode and a direct intervention mode, and a working mode adjusting module is arranged for adjusting the working modes between the feedback intervention mode and the direct intervention mode. For example, the working mode adjusting module can adjust the working modes of the feedback intervention mode and the direct intervention mode by adjusting the switch.
In the feedback intervention mode, the electrical stimulation is performed only when fatigue is detected (when the fatigue degree index is greater than the preset first threshold), that is, the above embodiments all work in the feedback intervention mode. In the direct intervention mode, fatigue detection is not needed, and the electric stimulation module directly carries out electric stimulation. By setting the direct intervention mode, when a person has the requirement of receiving the electric stimulation, the electric stimulation is carried out on the part of the human body needing the electric stimulation by using the anti-driving fatigue safety auxiliary system.
According to the driving fatigue prevention safety auxiliary system provided by the embodiment of the invention, the flexibility of implementing electric stimulation is improved by adjusting the working mode between the feedback intervention mode and the direct intervention mode.
According to the driving fatigue prevention safety auxiliary system provided by the embodiment of the invention, the system further comprises a fixing device, and the fixing device is used for fixing the PPG measuring module 1, the calculation and control module 2 and the electrical stimulation module 3 on a steering wheel.
The driving fatigue prevention safety auxiliary system further comprises a fixing device, and the fixing device is used for fixing the PPG measuring module 1, the calculation and control module 2 and the electrical stimulation module 3 on the steering wheel. The fixing device can adopt a fixing sleeve or other forms for fixing.
According to the driving fatigue resistant safety auxiliary system provided by the embodiment of the invention, the PPG measuring module, the calculating and controlling module and the electric stimulation module are fixed on the steering wheel by using the fixing device, so that the practicability is improved.
Fig. 2 is a schematic flow chart of a driving fatigue prevention safety assistance method according to an embodiment of the present invention. As shown in fig. 2, the method includes:
102, obtaining a fatigue degree index according to the PPG signal of the human body, calculating a stimulation parameter of an electrical stimulation process when the fatigue degree index is larger than a preset first threshold value, and sending the stimulation parameter to an electrical stimulation module so that the electrical stimulation module carries out electrical stimulation according to the stimulation parameter.
According to the driving fatigue resistance safety auxiliary method provided by the embodiment of the invention, the human PPG signal is acquired, the fatigue degree index is obtained according to the human PPG signal, when the fatigue degree index is larger than the preset first threshold value, the stimulation parameter of the electrical stimulation process is calculated, the electrical stimulation is carried out according to the stimulation parameter, a closed loop system integrating fatigue measurement and fatigue resistance intervention can be realized, the stimulation parameter is calculated according to the fatigue measurement result, the adaptability to different people is improved, and the intervention efficiency and effect are improved; fatigue degree indexes are obtained through PPG measurement of a human body, and electric stimulation is carried out after fatigue is detected to carry out anti-fatigue intervention, so that the driving safety is improved; the steering wheel is small and convenient, does not need complex equipment and can be arranged on the steering wheel in a rear mounting mode.
According to the safety auxiliary method for resisting driving fatigue provided by the embodiment of the invention, the acquiring of the PPG signal of the human body acquired by the PPG measuring module comprises the following steps: the PPG measurement module acquires a human body PPG signal acquired by a reflection type PPG sensor.
According to the driving fatigue resistant safety auxiliary method provided by the embodiment of the invention, the reflection type PPG sensor is adopted to measure the PPG signal of the human body, so that the system structure is smaller and more convenient to use.
According to the safety auxiliary method for resisting driving fatigue provided by the embodiment of the invention, the acquiring of the PPG signal of the human body acquired by the PPG measuring module comprises the following steps: and acquiring the human body PPG signal acquired by a PPG measuring module through a hand part in contact with the PPG measuring module.
According to the driving fatigue prevention safety auxiliary method provided by the embodiment of the invention, the hand part in contact with the PPG measuring module is used for collecting the PPG signal of the human body, so that the convenient collection of the PPG signal of the human body is realized.
According to the safety auxiliary method for resisting driving fatigue provided by the embodiment of the invention, the implementation of the electrical stimulation according to the stimulation parameters comprises the following steps: and performing electric stimulation on the hand part contacted with the stimulation electrode according to the stimulation parameters.
According to the driving fatigue prevention safety auxiliary method provided by the embodiment of the invention, the hand part in contact with the stimulation electrode is electrically stimulated according to the stimulation parameters, so that the convenient implementation of the electrical stimulation is realized.
According to the safety auxiliary method for resisting driving fatigue provided by the embodiment of the invention, the fatigue degree index is obtained according to the PPG signal of the human body, and the method comprises the following steps: and calculating a preset heart rate variability index according to the PPG signal of the human body, and obtaining a fatigue degree index according to the preset heart rate variability index.
According to the driving fatigue resistance safety auxiliary method provided by the embodiment of the invention, the preset heart rate variability index is calculated according to the PPG signal of the human body, the fatigue degree index is obtained according to the preset heart rate variability index, and the fatigue degree index can be simply and conveniently obtained through a small system structure.
According to the driving fatigue prevention safety auxiliary method provided by the embodiment of the invention, the calculation of the stimulation parameters in the electrical stimulation process comprises the following steps: obtaining the corresponding stimulation parameters according to the degree that the fatigue degree index is greater than the preset first threshold; wherein the stimulation parameters include at least a current waveform and a current intensity of the stimulation current; the performing electrical stimulation according to the stimulation parameters includes: by measuring and controlling the stimulation current, the stimulation current is made to satisfy the current waveform, and the average current or the maximum current of the stimulation current is made to stabilize on the current intensity.
According to the driving fatigue resistant safety auxiliary method provided by the embodiment of the invention, the corresponding stimulation parameters are obtained according to the degree that the fatigue degree index is greater than the preset first threshold, and by controlling the current waveform and the current intensity, the differential electrical stimulation is implemented according to different fatigue degrees, so that the adaptability to different fatigue degrees of the same person is improved.
According to the safety auxiliary method for resisting driving fatigue provided by the embodiment of the invention, the method further comprises the following steps: and obtaining stimulation time according to the degree that the fatigue degree index is greater than the preset first threshold, and sending the stimulation time to the electrical stimulation module so that the electrical stimulation module performs electrical stimulation according to the stimulation time.
According to the driving fatigue resistant safety auxiliary method provided by the embodiment of the invention, the stimulation time is obtained according to the degree that the fatigue degree index is greater than the preset first threshold value, and the electrical stimulation is implemented according to the stimulation time, so that the differential electrical stimulation is further implemented according to different fatigue degrees, and the adaptability to different fatigue degrees of the same person is improved.
According to the safety auxiliary method for resisting driving fatigue provided by the embodiment of the invention, the method further comprises the following steps: and transmitting the fatigue degree index to the electrical stimulation module in real time, so that the electrical stimulation module responds to the fatigue degree index reduced to be less than or equal to a preset second threshold value for a preset time, and automatically stopping electrical stimulation.
According to the driving fatigue resistant safety auxiliary method provided by the embodiment of the invention, the timing for stopping the electric stimulation is determined according to the change condition of the fatigue degree index, so that the effect of the electric stimulation is ensured.
According to the safety auxiliary method for resisting driving fatigue provided by the embodiment of the invention, the method further comprises the following steps: adjusting the working mode between the current feedback intervention mode and the direct intervention mode; and under the direct intervention mode, controlling the electrical stimulation module to directly carry out electrical stimulation.
According to the driving fatigue resistance safety auxiliary method provided by the embodiment of the invention, the flexibility of implementing electric stimulation is improved by adjusting the working mode between the feedback intervention mode and the direct intervention mode.
The working principle of the driving fatigue prevention safety auxiliary method provided by each embodiment is the same as that of the driving fatigue prevention safety auxiliary system, and the specific implementation process is not repeated.
Fig. 3 is a schematic structural diagram of an electronic device according to an embodiment of the present invention, and as shown in fig. 3, the electronic device may include: a processor (processor)310, a communication Interface (communication Interface)320, a memory (memory)330 and a communication bus 340, wherein the processor 310, the communication Interface 320 and the memory 330 communicate with each other via the communication bus 340. The processor 310 may invoke logic instructions in the memory 330 to perform a driving fatigue safety assistance method comprising: acquiring a human body PPG signal acquired by a PPG measurement module; and obtaining a fatigue degree index according to the PPG signal of the human body, calculating a stimulation parameter in an electrical stimulation process when the fatigue degree index is larger than a preset first threshold value, and sending the stimulation parameter to an electrical stimulation module so that the electrical stimulation module carries out electrical stimulation according to the stimulation parameter.
In addition, the logic instructions in the memory 330 may be implemented in the form of software functional units and stored in a computer readable storage medium when the software functional units are sold or used as independent products. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
In another aspect, an embodiment of the present invention further provides a computer program product, where the computer program product includes a computer program, the computer program may be stored on a non-transitory computer-readable storage medium, and when the computer program is executed by a processor, a computer is capable of executing the driving fatigue prevention safety assistance method provided by the above methods, where the method includes: acquiring a human body PPG signal acquired by a PPG measurement module; and obtaining a fatigue degree index according to the PPG signal of the human body, calculating a stimulation parameter in an electrical stimulation process when the fatigue degree index is larger than a preset first threshold value, and sending the stimulation parameter to an electrical stimulation module so that the electrical stimulation module carries out electrical stimulation according to the stimulation parameter.
In yet another aspect, an embodiment of the present invention further provides a non-transitory computer-readable storage medium, on which a computer program is stored, the computer program being implemented by a processor to execute a driving fatigue resistance safety assistance method provided by the above methods, the method including: acquiring a human body PPG signal acquired by a PPG measurement module; and obtaining a fatigue degree index according to the PPG signal of the human body, calculating a stimulation parameter in an electrical stimulation process when the fatigue degree index is larger than a preset first threshold value, and sending the stimulation parameter to an electrical stimulation module so that the electrical stimulation module carries out electrical stimulation according to the stimulation parameter.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. Based on the understanding, the above technical solutions substantially or otherwise contributing to the prior art may be embodied in the form of a software product, which may be stored in a computer-readable storage medium, such as ROM/RAM, magnetic disk, optical disk, etc., and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method according to the various embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides an anti driving fatigue safety auxiliary system which characterized in that, including installing PPG measurement module, calculation and control module and the electro photoluminescence module on the steering wheel, wherein:
the PPG measuring module is used for acquiring a human body PPG signal and sending the human body PPG signal to the calculating and controlling module;
the calculation and control module is used for receiving the human body PPG signal, obtaining a fatigue degree index according to the human body PPG signal, calculating a stimulation parameter in an electrical stimulation process when the fatigue degree index is larger than a preset first threshold value, and sending the stimulation parameter to the electrical stimulation module;
and the electrical stimulation module is used for receiving the stimulation parameters and implementing electrical stimulation according to the stimulation parameters.
2. The driving fatigue prevention safety assistance system according to claim 1, wherein the PPG measurement module, when used for acquiring PPG signals of a human body, is specifically configured to: a reflection type PPG sensor is adopted to acquire a PPG signal of a human body.
3. The driving fatigue prevention safety assistance system according to claim 1, wherein the PPG measurement module, when used for acquiring PPG signals of a human body, is specifically configured to:
the human body PPG signal is acquired through a hand part in contact with the PPG measuring module.
4. The anti-driving fatigue safety assistance system according to claim 1, wherein the electrical stimulation module includes a stimulation electrode; when the electrical stimulation module is used for implementing electrical stimulation according to the stimulation parameters, the electrical stimulation module is specifically used for:
and performing electrical stimulation on the hand part contacted with the stimulation electrode according to the stimulation parameters.
5. The driving fatigue prevention safety assistance system according to claim 1, wherein the calculation and control module, when being configured to calculate the stimulation parameters of the electrical stimulation process, is specifically configured to:
obtaining the corresponding stimulation parameters according to the degree that the fatigue degree index is greater than the preset first threshold; wherein the stimulation parameters include at least a current waveform and a current intensity of the stimulation current;
when the electrical stimulation module is used for implementing electrical stimulation according to the stimulation parameters, the electrical stimulation module is specifically used for: by measuring and controlling the stimulation current, the stimulation current is made to satisfy the current waveform, and the average current or the maximum current of the stimulation current is made to stabilize on the current intensity.
6. The system of claim 1, wherein the computing and control module is further configured to: obtaining stimulation time according to the degree that the fatigue degree index is greater than the preset first threshold, and sending the stimulation time to the electrical stimulation module;
the electrical stimulation module is also used for receiving the stimulation time and implementing electrical stimulation according to the stimulation time.
7. The system of claim 1, wherein the computing and control module is further configured to: transmitting the fatigue degree index to the electrical stimulation module in real time;
the electrical stimulation module is further configured to: automatically stopping electrical stimulation in response to the fatigue level index decreasing to less than or equal to a preset second threshold for a preset time.
8. The driving fatigue safety assistance system according to any one of claims 1 to 7, further comprising an operation mode adjustment module configured to: adjusting the working mode between the current feedback intervention mode and the direct intervention mode; wherein, in the direct intervention mode, the electrical stimulation module directly administers electrical stimulation.
9. The system of claim 1, further comprising a fixture for securing the PPG measurement module, the calculation and control module, and the electrical stimulation module to a steering wheel.
10. An anti-driving fatigue safety assistance method, characterized by comprising:
acquiring a human body PPG signal acquired by a PPG measurement module;
and obtaining a fatigue degree index according to the PPG signal of the human body, calculating a stimulation parameter in an electrical stimulation process when the fatigue degree index is larger than a preset first threshold value, and sending the stimulation parameter to an electrical stimulation module so that the electrical stimulation module carries out electrical stimulation according to the stimulation parameter.
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