CN107331122A - Driver tired driving monitoring method and monitoring system - Google Patents
Driver tired driving monitoring method and monitoring system Download PDFInfo
- Publication number
- CN107331122A CN107331122A CN201710622398.6A CN201710622398A CN107331122A CN 107331122 A CN107331122 A CN 107331122A CN 201710622398 A CN201710622398 A CN 201710622398A CN 107331122 A CN107331122 A CN 107331122A
- Authority
- CN
- China
- Prior art keywords
- driver
- doppler frequency
- wireless signal
- defined threshold
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- 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
- G08B21/06—Alarms for ensuring the safety of persons indicating a condition of sleep, e.g. anti-dozing alarms
Landscapes
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Abstract
The present invention relates to driver tired driving monitoring method and monitoring system.This method includes：Initial setup procedure, sets wireless launcher and radio receiver in the car；Judgment step is monitored, radio receiver receives the wireless signal reflected from driver, judges the Doppler frequency f of the wireless signaldWhether it is less than defined threshold, following prompting steps is entered if defined threshold is less than；And step is reminded, alerting signal is sent to remind driver.The human body active state of driver can accurately be monitored according to the present invention, driver can be reminded under driver tired driving or sleep state, thus, it is possible to the generation effectively tried to forestall traffic accidents.
Description
Technical field
The present invention relates to safe driving of vehicle technology, more particularly to a kind of driver tired driving monitoring method with
And monitoring system.
Background technology
In order to prevent driver from traffic accident occurring because of fatigue driving, preventing driver was provided in the prior art
The method of fatigue driving.As the method for preventing driver fatigue driving, such as most at present using is following two：
(1) monitoring method centered on vehicle, by detecting the form situation of vehicle, for example, if walk snakelike route,
No is to neglect soon suddenly slow etc., and the fatigue conditions of driver are thus judged indirectly.But, this method of testing exists a variety of uncertain
Property, as it is possible that being that pavement behavior causes vehicle traveling to occur above-mentioned state, therefore, its accuracy is than relatively low.
(2) monitoring method centered on driver, mainly gathers the facial image information of driver, mainly eye
Eyeball, then the number of times that eyes blink is obtained by computer disposal, the fatigue conditions of driver are judged with this.But this collection
The method of the fatigue state of the monitoring driver of face-image there are problems that the following is：It is required that user can not wear sun eye
Mirror, moreover, having that quantity is big, processing is complicated using facial image information collection physiological signal, being inconvenient to transmit, easily causing and drive
The weak point of the privacy exposure for the person of sailing etc..
The content of the invention
In view of the above problems, the present invention is intended to provide a kind of can detect that the driver of driver fatigue state is tired exactly
Please monitoring method and monitoring system are sailed.
The driver tired driving monitoring method of one aspect of the present invention, it is characterised in that comprise the steps：
Initial setup procedure, sets wireless launcher and radio receiver in the car；
Judgment step is monitored, radio receiver receives the wireless signal reflected from driver, and judges that this is wireless
The Doppler frequency f of signaldWhether it is less than defined threshold, following prompting steps is entered if defined threshold is less than；And
Step is reminded, sends alerting signal to remind driver.
Alternatively, the monitoring judgment step includes following sub-steps：
Receive and send sub-step, wireless launcher transmitting wireless signal, radio receiver is received from driver's human body
The wireless signal reflected；
Doppler frequency fdSub-step is calculated, carrying out processing calculating for the wireless signal received obtains Doppler frequency
fd；
Judge sub-step, judge the Doppler frequency f that the calculating is obtaineddWhether defined threshold is less than, if less than regulation threshold
Value then enters the prompting step.
Alternatively, in the Doppler frequency fdCalculate in sub-step, the calculating includes：
Interference is fixed for the wireless signal received to eliminate；
Short Time Fourier Transform is done to eliminating the signal after interference；And
Doppler frequency f is used as to the statistical average that the output after Short Time Fourier Transform carries out Doppler frequencydOutput.
Alternatively, the defined threshold is 5Hz.
The driver tired driving monitoring system of the present invention, it is characterised in that possess：
Wireless launcher, for launching wireless signal；
Radio receiver, for receiving the wireless signal reflected from driver；
Judgment means are monitored, is handled for the wireless signal that the radio receiver is received and judges that this is wireless
The Doppler frequency f of signaldWhether it is less than defined threshold, trigger signal is exported if defined threshold is less than；And
Alarm set, for sending alerting signal to driver according to the trigger signal.
Alternatively, the monitoring judgment means possess：
Computing module, carries out processing calculating for the wireless signal received and obtains Doppler frequency fd；And
Judge module, judges that the calculating and module calculate obtained Doppler frequency fdWhether defined threshold is less than, if
Trigger signal is then exported less than defined threshold.
Alternatively, the computing module is used to interference elimination is fixed for the wireless signal received, dry to eliminating
Signal after disturbing carries out the statistical average of Doppler frequency to export Doppler frequency f after doing Short Time Fourier Transformd。
Alternatively, the defined threshold is 5Hz.
The computer-readable medium of an aspect of of the present present invention, is stored thereon with computer program, it is characterised in that the calculating
Machine program realizes above-mentioned driver tired driving monitoring method when being executed by processor the step of.
The vehicle control apparatus of an aspect of of the present present invention, including memory, processor and store on a memory and can
The computer program run on a processor, it is characterised in that realize and drive during computer program described in the computing device
The step of member's fatigue driving monitoring method.
According to the driver tired driving monitoring method and monitoring system of the present invention, user without dressing any equipment,
The active situation of user can be just monitored, prompting is sent to driver by alarm set under fatigue driving or sleep state,
Thus, it is possible to the generation effectively tried to forestall traffic accidents, the Doppler frequency for the radio electromagnetsm signal that can be reflected human body is carried out
Analysis, can accurately obtain the active state of user, be monitored thus, it is possible to the fatigue state exactly to driver.
Brief description of the drawings
Fig. 1 is the construction block diagram for the driver tired driving monitoring system for representing an embodiment of the present invention.
Fig. 2 is to illustrate human body active state and Doppler frequency fdGraph of a relation.
Fig. 3 is the structure of the monitoring judgment means in the driver tired driving monitoring system for represent an embodiment of the present invention
Make block diagram.
Fig. 4 is the flow chart for the driver tired driving monitoring method for representing an embodiment of the present invention.
Embodiment
What is be described below is some in multiple embodiments of the invention, it is desirable to provide to the basic understanding of the present invention.And
It is not intended to the crucial or conclusive key element for confirming the present invention or limits scope of the claimed.
It was found by the inventors of the present invention that in the case that radio signal or electromagnetic wave signal form reflection on human body,
Its reflection case can be relevant and different with the activity situation especially movement rate v of people active state, such as normally open
Car also has obvious difference with sleep, the electromagnetic wave of corresponding reflection.Therefore, in the present invention, reflected by monitoring human body
Radio signal so as to obtaining human body active state, thus come monitor driver whether fatigue driving.
Specifically, driver tired driving monitoring method of the invention is by analyzing the nothing reflected from driver's body
Line electric signal, so as to detect the active state of people, its general principle is as follows：Because driver does not concentrate in sleep or energy
Situation and driver under normal circumstances (namely reasonable activity condition), the amplitude and orientation of swing are very different,
Therefore, causing the electromagnetic wave of reflection can also be very different, therefore, the electromagnetic wave situation that detection and analysis are reflected by human body, from
And it is in sleep state or normal motion state, once detecting people is in sleep state, at once with prompting to analyze people
Driver, so that the generation that avoids traffic accident.
Fig. 1 is the construction block diagram for the driver tired driving monitoring system for representing an embodiment of the present invention.
As shown in figure 1, the driver tired driving monitoring system of an embodiment of the present invention possesses：Wireless launcher
100th, radio receiver 200, detection judgment means 300 and alarm set 400.
Wireless launcher 100 is used to launch wireless signal.Radio receiver 200 is used to receive anti-from driver's human body
It is emitted back towards the wireless signal come.Wireless launcher 100, radio receiver 200 can be arranged on the clear position in vehicle, example
As windshield clear position or ceiling position in the car is set.
Monitoring judgment means 300 carry out predetermined processing for the wireless signal that radio receiver 200 is received and judged
The Doppler frequency f of the wireless signaldWhether it is less than defined threshold, trigger signal is exported if defined threshold is less than.
The trigger signal that alarm set 400 is used to be exported according to detection judgment means 300 sends alerting signal to driver.
As alerting signal, for example, can have and driver is waken up by loudspeaker, or pass through seat vibration.
Then, acted for the progress of monitoring judgment means 300 in the driver tired driving monitoring system of the present invention
Journey and construction are illustrated.
Wireless launcher 100 launches known wireless signal, and (orthogonal frequency is multiple for OFDM for the modulation system used
With), transmission signal is known signal.When radio receiver 200 receives the process human body reflected radio signal of transmission signal
When, monitoring judgment means 300 analyze the Doppler frequency (Doppler Frequency) of the radio signal reflected from human body
fd, with people movement rate v and wireless signal carrier frequency fcAnd light velocity speed c meets following formula：
Therefore, for the different active states of people, the Doppler's frequency for the radio signal that radio receiver 200 is received
Rate fdThere is corresponding difference.When people is active, the Doppler frequency of the wireless signal of reflection it is general 10~
140Hz, and when people is in sleep or inactive state, its Doppler frequency is normally close in 0Hz.
Fig. 2 is to illustrate human body active state and Doppler frequency fdGraph of a relation.
In fig. 2, transverse axis represents the time (second), and the longitudinal axis represents Doppler frequency (Hz).As shown in Fig. 2 upper arrow institute
Refer to the Doppler frequency that part is the radio signal under normal condition, arrow signified part in lower section is wireless under sleep state
The Doppler frequency of electric signal.Thus, it will be seen that according to the Doppler frequency value model for receiving radio signal
Enclose, it is possible to speculate the active state for obtaining people.Therefore, connect by radio receiver 200 by 300 Duis by monitoring judgment means
Receive wireless signal and do the analysis of its Doppler frequency, it is possible to distinguish the active state for obtaining people.
Then, illustrated for monitoring the specific configuration of judgment means 300.
Fig. 3 is the structure of the monitoring judgment means in the driver tired driving monitoring system for represent an embodiment of the present invention
Make block diagram.
As shown in figure 3, monitoring judgment means 300 possess：Computing module 310, for entering for the wireless signal received
Row processing calculating obtains Doppler frequency fd；And judge module 320, for judging that the calculating and module calculate what is obtained
Doppler frequency fdWhether it is less than defined threshold, trigger signal is exported if defined threshold is less than.
As an example, transmission signal is in 5.8G ISM band, and modulation system is OFDM (orthogonal frequency division multiplexed) tune
System continuously repeats transmitting identical ofdm modulation signal.
The computing module 310 in judgment means 300 is monitored after radio receiver 200 receives wireless signal, it is first
After the interference that first fixed to the signal received is eliminated, Short Time Fourier Transform (STFT) operation is then done to signal.Wherein, make
For fixed interference elimination method, for example, fixed interference can be eliminated using shield technology, or eliminate solid using filtering technique
Fixed interference.Secondly, on Short Time Fourier Transform (STFT) operation, the resolution of time and frequency for example can be respectively 10 millis
Output after second and 1Hz, Short Time Fourier Transform is used for judging the active state of people.Wherein, after to Short Time Fourier Transform
Output, within 100 milliseconds of time, the statistical average for doing Doppler frequency obtains Doppler frequency fdAverage value, specifically such as
Under：
It is assumed that the radio baseband signal that the radio receiver 200 in k-th of 100 milliseconds of times is received can be expressed as
rk,0,, rk,1,...,rk,N-1,, defining differential signal is：Δrk,i,=rk,i,-rk-1,i,Computing module 310 is to differential signal Δ rk,i,
The interference that fixes is eliminated, while to Δ rk,i,Do Short Time Fourier Transform (STFT) operation so that obtain it is desirable that it is how general
Strangle frequency fd.Wherein, Short Time Fourier Transform is defined as follows：
Wherein, w (i) is window function sequence.
Next, it is determined that the Doppler frequency f that module 320 is exported for computing module 310dValue judged, Ruo Duopu
Strangle frequency fdValue be more than defined threshold in the case of, be determined as user be in normal driving state, if Doppler frequency fdValue
In the case of less than setting, then it is determined as that user is in sleep or fatigue driving state.
Here, exemplified by taking 5Hz as defined threshold, but the present invention is not limited to the value, can have above and below the value
It is a range of to float.
Then, the driver tired driving monitoring method for this embodiment of the invention is illustrated.Fig. 4 is to represent
The flow chart of the driver tired driving monitoring method of this embodiment of the invention.
As shown in figure 4, in the step s 100, driver tired driving monitoring system of the invention is started working.In step
In S200, the transmitting OFDM wireless signals of wireless launcher 100.In step S300, radio receiver 200 receives wireless communication
Number.In step S400, computing module 310 starts the signal after interference eliminates function and eliminated to interference and does video analysis
(STFT).In step S500, judge module 320 judge wireless signal Doppler frequency whether>5Hz, sentences if 5Hz is more than
Break as user's normal driving (step S600), if Doppler frequency is not>5Hz, then be judged as that human fatigue drives (step
S700), then, alarm set 400 sends prompting message to driver in step S800, for example, voice reminder or vibration
Remind etc..
As described above, the driver tired driving monitoring method and monitoring system of the present invention, user are any without dressing
Equipment, it becomes possible to monitor the active situation of user.In accordance with the invention it is possible to realize a kind of by dividing receiving radio signal
Analysis, so that whether monitoring driver is fatigue driving or sleep state automatically, by carrying under fatigue driving or sleep state
Device of waking up sends prompting to driver, thus, it is possible to the generation effectively tried to forestall traffic accidents.Moreover, in the present invention, by dividing
The radio electromagnetsm signal reflected from human body is analysed, for example, analyzes the Doppler frequency of the signal, can accurately obtain user's
Active state, is monitored thus, it is possible to the fatigue state exactly to driver.
On the other hand, the present invention also provides a kind of computer-readable medium, is stored thereon with computer program, its feature exists
In the driver tired driving monitoring method of the realization present invention when computer program is executed by processor.
Furthermore, the present invention also provides a kind of vehicle control apparatus, including memory, processor and storage are on a memory
And the computer program that can be run on a processor, it is characterised in that realized described in the computing device during computer program
The driver tired driving monitoring method of the present invention.
Example above primarily illustrates the driver tired driving monitoring method and monitoring system of the present invention.Although only right
The embodiment of some of present invention is described, but those of ordinary skill in the art are it is to be appreciated that the present invention
Can be without departing from its spirit with implementing in scope in many other forms.Therefore, the example shown and embodiment quilt
It is considered as illustrative and not restrictive, is not departing from the feelings of the spirit and scope of the present invention as defined in appended claims
Under condition, the present invention may cover various modifications and replacement.
Claims (10)
1. a kind of driver tired driving monitoring method, it is characterised in that comprise the steps：
Initial setup procedure, sets wireless launcher and radio receiver in the car；
Judgment step is monitored, radio receiver receives the wireless signal reflected from driver, and judges the wireless signal
Doppler frequency fdWhether it is less than defined threshold, following prompting steps is entered if defined threshold is less than；And
Step is reminded, sends alerting signal to remind driver.
2. driver tired driving monitoring method as claimed in claim 1, it is characterised in that
The monitoring judgment step includes following sub-steps：
Receive and send sub-step, wireless launcher transmitting wireless signal, radio receiver is received from the reflection of driver's human body
The wireless signal returned；
Doppler frequency fdSub-step is calculated, carrying out processing calculating for the wireless signal received obtains Doppler frequency fd；
Judge sub-step, judge the Doppler frequency f that the calculating is obtaineddWhether it is less than defined threshold, enters if defined threshold is less than
Enter the prompting step.
3. driver tired driving monitoring method as claimed in claim 2, it is characterised in that
In the Doppler frequency fdCalculate in sub-step, the calculating includes：
Interference is fixed for the wireless signal received to eliminate；
Short Time Fourier Transform is done to eliminating the signal after interference；And
Doppler frequency f is used as to the statistical average that the output after Short Time Fourier Transform carries out Doppler frequencydOutput.
4. driver tired driving monitoring method as claimed in claim 2, it is characterised in that
The defined threshold is 5Hz.
5. a kind of driver tired driving monitoring system, it is characterised in that possess：
Wireless launcher, for launching wireless signal；
Radio receiver, for receiving the wireless signal reflected from driver；
Judgment means are monitored, is handled for the wireless signal that the radio receiver is received and judges the wireless signal
Doppler frequency fdWhether it is less than defined threshold, trigger signal is exported if defined threshold is less than；And
Alarm set, for sending alerting signal to driver according to the trigger signal.
6. driver tired driving monitoring system as claimed in claim 5, it is characterised in that
The monitoring judgment means possess：
Computing module, carries out processing calculating for the wireless signal received and obtains Doppler frequency fd；
Judge module, judges that the calculating and module calculate obtained Doppler frequency fdWhether defined threshold is less than, if less than rule
Determine threshold value and then export trigger signal.
7. driver tired driving monitoring system as claimed in claim 6, it is characterised in that
The computing module is used to interference elimination is fixed for the wireless signal received, is done to eliminating the signal after interference
The statistical average of Doppler frequency is carried out after Short Time Fourier Transform to export Doppler frequency fd。
8. driver tired driving monitoring system as claimed in claim 5, it is characterised in that
The defined threshold is 5Hz.
9. a kind of computer-readable medium, is stored thereon with computer program, it is characterised in that the computer program is by processor
The step of any one methods described in claim 1 ~ 4 is realized during execution.
10. a kind of vehicle control apparatus, including memory, processor and store on a memory and can run on a processor
Computer program, it is characterised in that realized described in the computing device during computer program any one in claim 1 ~ 4
The step of item methods described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710622398.6A CN107331122A (en) | 2017-07-27 | 2017-07-27 | Driver tired driving monitoring method and monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710622398.6A CN107331122A (en) | 2017-07-27 | 2017-07-27 | Driver tired driving monitoring method and monitoring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107331122A true CN107331122A (en) | 2017-11-07 |
Family
ID=60227848
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710622398.6A Pending CN107331122A (en) | 2017-07-27 | 2017-07-27 | Driver tired driving monitoring method and monitoring system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107331122A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114358065A (en) * | 2021-12-23 | 2022-04-15 | 东风柳州汽车有限公司 | Method, device and equipment for monitoring smoking behavior of driver and storage medium |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104274192A (en) * | 2013-07-11 | 2015-01-14 | L&P物业管理公司 | Computer-Aided System Detecting Operator Fatigue (CASDOF) |
| WO2015160272A1 (en) * | 2014-04-14 | 2015-10-22 | Novelic D.O.O. | Mm-wave radar driver fatigue sensor apparatus |
| WO2015160273A1 (en) * | 2014-04-14 | 2015-10-22 | Novelic D.O.O. | Millimetre-wave seat occupation radar sensor |
| CN106297194A (en) * | 2016-10-13 | 2017-01-04 | 杭州电子科技大学 | A kind of fatigue drive of car monitoring system |
| CN206239402U (en) * | 2016-07-29 | 2017-06-13 | 哈尔滨理工大学 | A kind of fatigue drive of car real-time detecting system based on DSP |
-
2017
- 2017-07-27 CN CN201710622398.6A patent/CN107331122A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104274192A (en) * | 2013-07-11 | 2015-01-14 | L&P物业管理公司 | Computer-Aided System Detecting Operator Fatigue (CASDOF) |
| WO2015160272A1 (en) * | 2014-04-14 | 2015-10-22 | Novelic D.O.O. | Mm-wave radar driver fatigue sensor apparatus |
| WO2015160273A1 (en) * | 2014-04-14 | 2015-10-22 | Novelic D.O.O. | Millimetre-wave seat occupation radar sensor |
| CN206239402U (en) * | 2016-07-29 | 2017-06-13 | 哈尔滨理工大学 | A kind of fatigue drive of car real-time detecting system based on DSP |
| CN106297194A (en) * | 2016-10-13 | 2017-01-04 | 杭州电子科技大学 | A kind of fatigue drive of car monitoring system |
Non-Patent Citations (1)
| Title |
|---|
| 蓝方宇: ""基于微摄动与步态特征的人体探测算法研究"", 《万方学位论文库》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114358065A (en) * | 2021-12-23 | 2022-04-15 | 东风柳州汽车有限公司 | Method, device and equipment for monitoring smoking behavior of driver and storage medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Engelbrecht et al. | Survey of smartphone‐based sensing in vehicles for intelligent transportation system applications | |
| US9763614B2 (en) | Wearable device and system for monitoring physical behavior of a vehicle operator | |
| Chang et al. | Design and implementation of a drowsiness-fatigue-detection system based on wearable smart glasses to increase road safety | |
| Dai et al. | Mobile phone based drunk driving detection | |
| EP3717996B1 (en) | System and method for vehicle sensing and analysis | |
| CN103989471B (en) | A kind of method for detecting fatigue driving based on electroencephalogram identification | |
| EP3782860B1 (en) | Method and system for vehicle speed estimation | |
| CN103606248A (en) | Automatic detection method and system for human body falling-over | |
| CN110027567A (en) | The driving condition of driver determines method, apparatus and storage medium | |
| CN106571015A (en) | Driving behavior data collection method based on Internet | |
| CN105678959A (en) | Monitoring and early-warning method and system for fatigue driving | |
| CN105959021A (en) | Vehicle-mounted diagnosis processing method and terminal based on wearable equipment | |
| CN104146722A (en) | Driving fatigue detecting and grading early warning device and method based on head signals | |
| Xu et al. | ER: Early recognition of inattentive driving leveraging audio devices on smartphones | |
| Jiang et al. | Driversonar: Fine-grained dangerous driving detection using active sonar | |
| CN212098749U (en) | Intelligent system and electronic module | |
| CN108186034B (en) | Driver fatigue detection device and working method | |
| US20230393619A1 (en) | System and method for assessing device usage | |
| CN107331122A (en) | Driver tired driving monitoring method and monitoring system | |
| Xu et al. | UHead: Driver Attention Monitoring System Using UWB Radar | |
| CN111292493A (en) | Vibration reminding method, device, electronic equipment and system | |
| Wang et al. | Fast Detection of Handheld Phone-distracted Driving by Sensing the Driver's Hand-grip | |
| Li et al. | WisDriver: A WiFi and Smartphone Sensing System for Safely Driving | |
| US12125321B2 (en) | Method and system for vehicle speed estimation | |
| CN114212093B (en) | Safe driving monitoring method, system and storable medium |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20171107 |