CN110942592A - Fatigue driving early warning device and method - Google Patents
Fatigue driving early warning device and method Download PDFInfo
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- CN110942592A CN110942592A CN201911404191.7A CN201911404191A CN110942592A CN 110942592 A CN110942592 A CN 110942592A CN 201911404191 A CN201911404191 A CN 201911404191A CN 110942592 A CN110942592 A CN 110942592A
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- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/02—Alarms for ensuring the safety of persons
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Abstract
The invention belongs to the technical field of automobile safety, and discloses a fatigue driving early warning device and a method, wherein the fatigue driving early warning device is connected with an automobile safety belt; the fatigue driving early warning device comprises a pressure sensor, a heart rate tester, an early warning module, a storage module, a timer and a central processing unit; the pressure sensor, the heart rate tester, the early warning module, the storage module and the timer are all connected with the central processing unit. The fatigue driving early warning device has the advantages that a relatively firm detection method can be provided for the change intervals of different body types and different body qualities of each driver, the fatigue driving device is effectively separated from the binding with a high-end vehicle, the fatigue driving early warning device is directly installed on a safety belt of the driver, the fatigue driving early warning device can be directly suitable for various vehicle types, and the problem that the old vehicle type is difficult to install the too-complex fatigue driving early warning device can be effectively solved.
Description
Technical Field
The invention belongs to the technical field of automobile safety, and relates to a fatigue driving early warning device and method.
Background
According to statistics of traffic departments, more than 60% of traffic accidents are related to fatigue driving. Fatigue driving refers to the phenomenon that after a driver drives a vehicle continuously for a long time, the driver has disorder of physiological function and psychological function, and the driving skill is objectively reduced. The fatigue driving affects the attention, feeling, perception, thinking, judgment, consciousness, decision and movement of the driver, and the road traffic accident is easy to happen to the fatigue driving of the driver. The research on the driver safety state monitoring technology in China is started late, and related research is mainly carried out in research institutions such as universities. The embedded driving fatigue detection device based on machine vision is researched, a detection device platform is realized in a laboratory environment, and the efficiency of an algorithm, the instantaneity, the accuracy and the robustness of fatigue judgment are further improved; secondly, a series of experiments are carried out on the state detection of human eyes and the head movement, and the in-depth research work is carried out on judging the fatigue of a driver by utilizing the eye physiological characteristics based on the video; thirdly, the research of the device is carried out on the human eye positioning method; the main focus has been on the study of the physiological characteristics of the driver's face based on video signals.
Patent CN 208665055U discloses a fatigue driving reminding device, which determines whether the driver is fatigue driving by checking the driving time and the half-time rest time of the driver, and actively reports the audio content by voice to remind the driver in fatigue driving state. In order to achieve the purpose, a voice reminding module is needed, a processor is arranged in the voice reminding module, and the processor is connected with a bus; the storage module is connected with the processor and used for storing audio data; the timing module is connected with the processor and used for providing timing information for the processor; however, each functional module is arranged separately, and relates to each part of the whole vehicle, and some fatigue driving early warning devices are complex to install, large in size and difficult to replace and maintain; and the fatigue detection mode is easily influenced by the environment, and the detection result is not accurate enough. Therefore, at present, most of the early-warning devices adopt independent early-warning devices to perform fatigue early warning so as to improve the use convenience and the application range of the early-warning devices.
At present, fatigue early-warning devices are mostly in a hanging ear type, a watch type, a glasses type and a steering wheel touch type. The ear type fatigue early warning device has very simple functions, can give an alarm when a driver lowers his head, but is poor in practicability because the driver does not like wearing an additional object when driving the vehicle when considering that the driver does not always feel lowering his head when dozing off and the head-lowering characteristic caused by dozing off is late; the watch type and the glasses type fatigue early warning device estimate whether a person is tired or not by using pulse jumping, the problem of sudden sleep cannot be solved, the glasses type forcedly brings a piece of thick glasses to judge the blinking frequency, basically, many people are not suitable for the blinking frequency, and the blinking frequency can conflict with vision correction eyes and sunglasses, and the practicability is not high; the steering wheel touch type steering wheel senses whether a driver holds the steering wheel by installing some sensors on the steering wheel, which has no direct relation with fatigue, and the installation of the sensors can cause the steering wheel to be inconvenient to operate.
Disclosure of Invention
The invention aims to overcome the defects of low timeliness and inconvenience in wearing of the fatigue early warning device in the prior art, and provides a fatigue driving early warning device and a method.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
a fatigue driving early warning device comprises a pressure sensor, a heart rate tester, an early warning module, a storage module, a timer and a central processing unit; the pressure sensor, the heart rate tester, the early warning module, the storage module and the timer are all connected with the central processing unit;
the pressure sensor is used for detecting a pressure value between the safety belt and a driver and sending the pressure value to the central processing unit;
the heart rate tester is used for detecting the heart rate value of the driver and sending the heart rate value to the central processor;
the timer is used for providing timing information for the central processing unit;
the early warning module is used for playing preset early warning playing information;
the central processing unit is used for setting a pressure threshold value and a heart rate threshold value range according to the pressure value, the heart rate value and the timing information, storing the pressure threshold value and the heart rate threshold value range in the storage module, generating an early warning module starting signal according to the pressure value and the heart rate value and combining the pressure threshold value and the heart rate threshold value range, and sending the early warning module starting signal to the early warning module;
when in use, the fatigue driving early warning device is connected with the automobile safety belt.
The fatigue driving early warning device is further improved in that:
the central processing unit is internally provided with:
the pressure threshold setting module is connected with the pressure sensor and the storage module and is used for setting the average value of pressure values sent by the pressure sensor from the beginning to the preset pressure threshold setting time as a pressure threshold and storing the pressure threshold in the storage module;
the heart rate threshold setting module is connected with the heart rate tester and the storage module, and is used for respectively setting the maximum value and the minimum value of the heart rate numerical value sent by the heart rate tester from the beginning to the preset heart rate threshold setting time as the maximum value and the minimum value of the heart rate threshold range and storing the heart rate threshold range in the storage module;
the pressure comparison module is used for comparing the pressure value sent by the pressure sensor with a pressure threshold value, and sending a starting signal of the early warning module to the early warning module when the pressure value sent by the pressure sensor is greater than the pressure threshold value
And the heart rate comparison module is used for comparing the heart rate value sent by the heart rate tester with the heart rate threshold value, and sending an early warning module starting signal to the early warning module when the heart rate value sent by the heart rate tester is not in the heart rate threshold value range within the preset time.
The central processing unit is also internally provided with a pressure time comparison module for comparing the duration of the pressure value sent by the pressure sensor with a pressure time threshold according to the timing information provided by the timer, and sending a starting signal of the early warning module to the early warning module when the duration of the pressure value sent by the pressure sensor is greater than the pressure time threshold.
The early warning system also comprises an information sending module, wherein the information sending module is used for sending early warning sending information to a preset early warning terminal; a one-key closing button is arranged on the early warning module; the central processing unit is internally provided with a playing time comparison module, the playing time comparison module is used for comparing the playing time of the early warning module with a preset playing time threshold value according to the timing information provided by the timer, and when the playing time of the early warning module is greater than the preset playing time threshold value, a starting signal of the information sending module is generated and sent to the information sending module.
The early warning sending information is the current position information of the driver.
The information sending module is a 4g module.
The early warning module is a loudspeaker.
In another aspect of the present invention, a method for warning fatigue driving includes the following steps:
step 1: detecting a pressure value between the safety belt and a driver and recording detection time, and detecting a heart rate value of the driver and recording the detection time;
step 2: setting a pressure threshold according to the pressure value and preset pressure threshold setting time, and setting a heart rate threshold range according to the heart rate value and preset heart rate threshold setting time;
and step 3: when the pressure value is larger than the set pressure threshold value or when the heart rate value is not within the set heart rate threshold value range within the preset time, early warning playing information is played;
and 4, step 4: and when the time for playing the early warning playing information is greater than the preset playing time threshold, sending early warning sending information to a preset early warning terminal.
The fatigue driving early warning method is further improved as follows:
the specific method of the step 2 comprises the following steps:
setting the average value of the pressure values detected from the beginning to the preset pressure threshold setting time as a pressure threshold; and respectively setting the maximum value and the minimum value of the heart rate numerical value detected from the beginning to the preset heart rate threshold value within the set time as the maximum value and the minimum value of the heart rate threshold value range.
The step 3 further comprises:
and when the duration time of the detected pressure value is greater than a preset pressure time threshold value, playing early warning playing information.
Compared with the prior art, the invention has the following beneficial effects:
according to the fatigue driving early warning device, the fatigue driving early warning device is connected with the automobile safety belt, the fatigue driving device is effectively separated from the binding with a high-end vehicle, and is directly installed on the driver safety belt, so that the fatigue driving early warning device can be directly suitable for various vehicle types, the problem that the fatigue driving early warning device which is too complicated is difficult to install in old vehicle types can be effectively solved, and the driver does not need to wear the device, so that the discomfort of the driver is reduced. Establish pressure sensor in the driver fatigue early warning device, rhythm of the heart tester and early warning module, detect the pressure value between safety belt and the driver through pressure sensor, detect driver's rhythm of the heart value through the rhythm of the heart tester, and then send pressure value and rhythm of the heart value to central processing unit and handle, judge driver's current state, when appearing unusually, carry out the early warning through early warning module, remind the driver in time to make correct processing, combine pressure sensor and rhythm of the heart tester to use, and then improve driver fatigue detection's promptness.
Further, set pressure sensor as pressure threshold from beginning to the average value of the pressure numerical value that sends in presetting pressure threshold settlement time, set heart rate tester as heart rate threshold value scope's maximum value and minimum value respectively from beginning to the heart rate numerical value that sends in presetting heart rate threshold settlement time, and then adopt pressure threshold value and the heart rate threshold value scope of setting for to carry out the early warning index of driving once, can realize different sizes, the driver of different physique nature, all provide a relatively firm detection standard, and then promote the accuracy of testing result.
Furthermore, a pressure time comparison module is arranged to prevent the driver from continuously driving for a long time.
Furthermore, an information sending module for sending early warning sending information to a preset early warning terminal is arranged, so that the driver can timely inform the early warning terminal under the condition that the early warning module cannot be closed timely.
According to the fatigue driving early warning method, the pressure value between the safety belt and the driver is detected, the pressure threshold value and the heart rate threshold value range are set for different drivers in a targeted manner, the method can adapt to different drivers, and the early warning accuracy is ensured; the effectiveness of early warning is ensured by two modes of playing early warning playing information and sending early warning sending information to a preset early warning terminal.
Drawings
FIG. 1 is a block diagram of the fatigue driving warning device according to the present invention;
fig. 2 is a flow chart of the fatigue driving warning method according to the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, apparatus, article, or device that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or device.
The invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 1, the fatigue driving early warning device of the invention is mounted on a safety belt and comprises a pressure sensor, a heart rate tester, an information sending module, an early warning module, a storage module, a timer and a central processing unit; the pressure sensor, the heart rate tester, the information sending module, the storage module and the timer are all connected with the central processing unit.
And the pressure sensor is used for detecting a pressure value between the safety belt and the driver and sending the pressure value to the central processing unit.
And the heart rate tester is used for detecting the heart rate value of the driver and sending the heart rate value to the central processor.
The central processing unit is internally provided with a pressure threshold setting module, a heart rate threshold setting module, a pressure comparison module, a heart rate comparison module, a playing time comparison module and a pressure time comparison module.
And the pressure threshold setting module is connected with the pressure sensor and the storage module and is used for setting the average value of pressure values sent by the pressure sensor from the beginning to the preset pressure threshold setting time as a pressure threshold and storing the pressure threshold in the storage module.
The heart rate threshold value range setting module is connected with the heart rate tester and the storage module, and is used for setting the maximum value and the minimum value of the heart rate numerical value sent by the heart rate tester from the beginning to the preset heart rate threshold value setting time as the maximum value and the minimum value of the heart rate threshold value range and storing the heart rate threshold value range in the storage module.
And the pressure comparison module is used for comparing the pressure value sent by the pressure sensor with a pressure threshold value, and sending a starting signal of the early warning module to the early warning module when the pressure value sent by the pressure sensor is greater than the pressure threshold value.
And the heart rate comparison module is used for comparing the heart rate value sent by the heart rate tester with the heart rate threshold value, and sending an early warning module starting signal to the early warning module when the heart rate value sent by the heart rate tester is not in the heart rate threshold value range within the preset time.
And the playing time comparison module is used for comparing the playing time of the loudspeaker with a preset playing time threshold value according to the timing information provided by the timer, and generating and sending an information sending module starting signal to the information sending module when the playing time of the loudspeaker is greater than the preset playing time threshold value.
And the pressure time comparison module is used for comparing the duration of the pressure value sent by the pressure sensor with a pressure time threshold according to the timing information provided by the timer, and sending a starting signal of the early warning module to the early warning module when the duration of the pressure value sent by the pressure sensor is greater than a preset pressure time threshold.
And the timer is used for providing timing information for the central processing unit.
The early warning module is realized by adopting a loudspeaker, and when the starting signal is received, the early warning module plays preset early warning playing information. And the early warning module is also provided with a one-key closing button for manually closing the early warning module.
The information sending module is realized by adopting a 4g module and is used for sending early warning sending information to a preset early warning terminal, and the early warning terminal is a terminal product such as a notebook, a tablet, a touch screen communication device, a smart phone and vehicle-mounted equipment.
The invention relates to a fatigue driving early warning method, which comprises the following steps:
step 1: the pressure value between the safety belt and the driver is detected, the detection time is recorded, and the heart rate value of the driver is detected, and the detection time is recorded.
Step 2: when the pressure value is larger than the set pressure threshold value or when the heart rate value is not within the set heart rate threshold value range within the preset time, early warning playing information is played; and when the duration time of the detected pressure value is greater than a preset pressure time threshold value, playing early warning playing information.
The setting method of the pressure threshold value comprises the following steps: and setting the average value of the pressure values detected from the beginning to the preset pressure threshold setting time as the pressure threshold. The setting method of the heart rate threshold range comprises the following steps: and respectively setting the maximum value and the minimum value of the heart rate numerical value detected from the beginning to the preset heart rate threshold value within the set time as the maximum value and the minimum value of the heart rate threshold value range.
And step 3: and when the time for playing the early warning playing information is greater than the preset playing time threshold, sending early warning sending information to a preset early warning terminal.
The working process of the invention is as follows:
1. when a driver wears a safety belt, the pressure sensor detects a basic pressure, the timer starts to time the driving time of the driver, and the central processing unit guides the average value of the initial pressures within two to five minutes into the storage module for recording; and simultaneously, the heart rate detector starts to work and records the initial normal heart rate and guides the heart rate into the storage module for recording.
2. Under the pressure of the safety belt, the heart rate detector is close to the chest of the person to start heart rate testing, and the maximum value and the minimum value of the heart rate values which are measured in two to five minutes are transmitted to the storage module to be set as a heart rate threshold range. After that, the central processing unit compares the heart rate values transmitted by the heart rate tester every one minute, when the results are compared and displayed and the heart rate values are out of the heart rate threshold range, an early warning module starting signal is sent to the early warning module to carry out sound reminding, if the driver does not manually close the early warning module within thirty seconds, an information sending module starting signal is sent to an information sending module, and the information sending module sends early warning sending information (such as position information) to a preset early warning terminal.
3. After five minutes of the initial information record, the central processing unit works, the pressure value transmitted by the pressure sensor is continuously compared with the pressure threshold value, when the pressure value is changed rapidly, the situation that a driver gets off the vehicle, or the situation that the driver bumps the tail, brakes suddenly and the like can be considered, at the moment, a starting signal is preferentially sent to the early warning module, the early warning module can give out a huge sound for reminding, and if the driver does not turn off the early warning module manually within thirty seconds; the driver can be considered to lose the autonomous action ability and get into the conditions of coma and the like, the information sending module starts a signal to the information sending module, and the information sending module starts to work.
4. When the pressure sensor sends a pressure value to the central processing unit for four hours, a starting signal of the early warning module can be sent to the early warning module, and a driver is prompted to stop for rest.
5. When the driver completely finishes the driving behavior, the device is shut down, and simultaneously, data in the storage module are cleaned to ensure the application space of the storage module.
The fatigue driving early warning device can provide a relatively firm detection method for the variation interval of different pressure and heart rate of each driver caused by different body types and different body qualities. The fatigue driving device is effectively separated from the binding with a high-end vehicle, and is directly installed on a safety belt of a driver, so that the fatigue driving device can be directly suitable for various vehicle types, and the problem that an old vehicle type is difficult to install a too complex fatigue driving early warning device can be effectively solved.
The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (10)
1. A fatigue driving early warning device is characterized by comprising a pressure sensor, a heart rate tester, an early warning module, a storage module, a timer and a central processing unit; the pressure sensor, the heart rate tester, the early warning module, the storage module and the timer are all connected with the central processing unit;
the pressure sensor is used for detecting a pressure value between the safety belt and a driver and sending the pressure value to the central processing unit;
the heart rate tester is used for detecting the heart rate value of the driver and sending the heart rate value to the central processor;
the timer is used for providing timing information for the central processing unit;
the early warning module is used for playing preset early warning playing information;
the central processing unit is used for setting a pressure threshold value and a heart rate threshold value range according to the pressure value, the heart rate value and the timing information, storing the pressure threshold value and the heart rate threshold value range in the storage module, generating an early warning module starting signal according to the pressure value and the heart rate value and combining the pressure threshold value and the heart rate threshold value range, and sending the early warning module starting signal to the early warning module;
when in use, the fatigue driving early warning device is connected with the automobile safety belt.
2. The fatigue driving warning device according to claim 1, wherein the central processor is internally provided with:
the pressure threshold setting module is connected with the pressure sensor and the storage module and is used for setting the average value of pressure values sent by the pressure sensor from the beginning to the preset pressure threshold setting time as a pressure threshold and storing the pressure threshold in the storage module;
the heart rate threshold setting module is connected with the heart rate tester and the storage module, and is used for respectively setting the maximum value and the minimum value of the heart rate numerical value sent by the heart rate tester from the beginning to the preset heart rate threshold setting time as the maximum value and the minimum value of the heart rate threshold range and storing the heart rate threshold range in the storage module;
the pressure comparison module is used for comparing the pressure value sent by the pressure sensor with a pressure threshold value, and sending a starting signal of the early warning module to the early warning module when the pressure value sent by the pressure sensor is greater than the pressure threshold value
And the heart rate comparison module is used for comparing the heart rate value sent by the heart rate tester with the heart rate threshold value, and sending an early warning module starting signal to the early warning module when the heart rate value sent by the heart rate tester is not in the heart rate threshold value range within the preset time.
3. The fatigue driving early warning device according to claim 2, wherein a pressure time comparison module is further arranged in the central processing unit, and is used for comparing the duration of the pressure value sent by the pressure sensor with a pressure time threshold value according to timing information provided by the timer, and sending an early warning module starting signal to the early warning module when the duration of the pressure value sent by the pressure sensor is greater than the pressure time threshold value.
4. The fatigue driving early warning device according to claim 1, further comprising an information sending module, wherein the information sending module is used for sending early warning sending information to a preset early warning terminal; a one-key closing button is arranged on the early warning module; the central processing unit is internally provided with a playing time comparison module, the playing time comparison module is used for comparing the playing time of the early warning module with a preset playing time threshold value according to the timing information provided by the timer, and when the playing time of the early warning module is greater than the preset playing time threshold value, a starting signal of the information sending module is generated and sent to the information sending module.
5. The fatigue driving warning device according to claim 4, wherein the warning transmission information is driver current position information.
6. The fatigue driving warning device according to claim 4, wherein the information sending module is a 4g module.
7. The fatigue driving warning device of claim 1, wherein the warning module is a speaker.
8. A fatigue driving early warning method is characterized by comprising the following steps:
step 1: detecting a pressure value between the safety belt and a driver and recording detection time, and detecting a heart rate value of the driver and recording the detection time;
step 2: setting a pressure threshold according to the pressure value and preset pressure threshold setting time, and setting a heart rate threshold range according to the heart rate value and preset heart rate threshold setting time;
and step 3: when the pressure value is larger than the set pressure threshold value or when the heart rate value is not within the set heart rate threshold value range within the preset time, early warning playing information is played;
and 4, step 4: and when the time for playing the early warning playing information is greater than the preset playing time threshold, sending early warning sending information to a preset early warning terminal.
9. The fatigue driving warning device according to claim 8, wherein the specific method of step 2 is as follows:
setting the average value of the pressure values detected from the beginning to the preset pressure threshold setting time as a pressure threshold; and respectively setting the maximum value and the minimum value of the heart rate numerical value detected from the beginning to the preset heart rate threshold value within the set time as the maximum value and the minimum value of the heart rate threshold value range.
10. The fatigue driving warning device according to claim 8, wherein the step 3 further comprises:
and when the duration time of the detected pressure value is greater than a preset pressure time threshold value, playing early warning playing information.
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