CN105172794A - Automotive driver state recognition system based on steering wheel detection - Google Patents
Automotive driver state recognition system based on steering wheel detection Download PDFInfo
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- B60W2540/00—Input parameters relating to occupants
- B60W2540/18—Steering angle
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Abstract
The invention relates to a driver state recognition system based on steering wheel detection. The recognition system comprises a steering wheel motion sensor, a brain wave detection helmet, a wireless communication interface and a Freescale IMX6 processor, wherein the steering wheel motion sensor is used for detecting motion states of an automotive steering wheel; the brain wave detection helmet is used for detecting brain wave features of a driver; the IMX6 processor is connected with the steering wheel motion sensor, the brain wave detection helmet and the wireless communication interface, and determines whether to start the detective operation of the brain wave detection helmet or not based on the motion states; after the detective operation is started, the current driving state of the driver is determined according to an analysis result of the brain wave features, and is transmitted to the wireless communication interface. Through the recognition system disclosed by the invention, the analysis for the states of the driver can be started based on the judgment for the motion states of the automobile steering wheel, so that the detection efficiency is guaranteed, and besides, unnecessary power consumption of the system is reduced.
Description
The divisional application of the patent of " the automobile driver state recognition system based on bearing circle detects " that the present invention is application number is 201510180963.9, the applying date, to be April 16, denomination of invention in 2015 be.
Technical field
The present invention relates to detection of electrons field, particularly relate to a kind of automobile driver state recognition system detected based on bearing circle.
Background technology
Due to the increase of automobile quantity, the generation of traffic accident also presents increasing trend, and wherein, driver tired driving is a principal element.The reason of driver fatigue has multiple, such as drink too much alcohol, the day before yesterday does not have enough sleep, listen to the music or broadcast and too drop into, cause chaufeur to be sometimes self the fatigue state of cannot testing oneself, thus, need the mode of detection of electrons to help the behavior of chaufeur and the Timeliness coverage fatigue driving of corresponding management department to occur, so that stop immediately, change other chaufeur and continue to travel.
There is following defect in driver status detection of electrons scheme of the prior art: no matter (1) takes the detection of electrons under which kind of mechanism, all that whole process is carried out to the state-detection of chaufeur, for each electronic unit that detection scheme uses, its consumption of current is huge, for the chaufeur being in waking state for a long time, most of consumption of current is unnecessary; (2) because some detection of electrons means need to be arranged on chaufeur some accessory equipments with it, if laid for a long time, chaufeur action can be caused not smooth, reduce the traveling enjoyment of chaufeur.
Thus, need a kind of new driver status detection of electrons scheme, only when chaufeur may produce frazzle, the just detection of electrons of starting state, and in other cases, the detection of electrons of halted state, thus while guarantee Detection results, reduce the consumption of current of system and the burden of chaufeur.
Summary of the invention
In order to solve the problem, the invention provides a kind of driver status recognition system detected based on bearing circle, recent movement sensor is adopted to detect the state of kinematic motion of vehicle steering, schedule time threshold value is exceeded for trigger condition with vehicle steering, start the detection of driver status, like this, solve above-mentioned technical matters, high-precision brain wave detection technique ensure that the Detection results of condition detecting system of the present invention simultaneously.
According to an aspect of the present invention, provide a kind of driver status recognition system detected based on bearing circle, described recognition system comprises recent movement sensor, brain wave detects the helmet, wireless communication interface and Freescale IMX6 treater, described recent movement sensor is for detecting the state of kinematic motion of vehicle steering, described brain wave detects the helmet for detecting the brain wave feature of chaufeur, described Freescale IMX6 treater and described recent movement sensor, described brain wave detects the helmet and is connected respectively with described wireless communication interface, determine whether to start the detection operation that described brain wave detects the helmet based on described state of kinematic motion, and after the described detection operation of startup, according to the current driving condition of the analysis result determination chaufeur to described brain wave feature, current driving condition is sent to described wireless communication interface.
More specifically, in the described driver status recognition system detected based on bearing circle, also comprise: user input device, for the operation according to user, receive threshold value rest time of user's input, the first detecting factor threshold value and the second detecting factor threshold value, described first detecting factor threshold value is greater than described second detecting factor threshold value; SDRAM, connects described user input device, for receiving and storing threshold value described rest time, described first detecting factor threshold value and described second detecting factor threshold value; High-definition camera, comprise cmos sensor and secondary light source, described cmos sensor is taken to obtain face-image to chaufeur face, the shooting that described secondary light source is described cmos sensor provides illumination fill-in light, the intensity of described illumination fill-in light and the light luminance of described secondary light source surrounding environment are inversely proportional to, and the resolution of described face-image is 1280 × 720; Power equipment supply, comprise solar powered device, storage battery, change-over switch and electric pressure converter, described change-over switch is connected respectively with described solar powered device and described storage battery, determine whether be switched to described solar powered device to be powered by described solar powered device according to storage battery dump energy, described electric pressure converter is connected with described change-over switch, with the 5V voltage transitions will inputted by change-over switch for 3.3V voltage; Described wireless communication interface is connected respectively with described Freescale IMX6 treater and described high-definition camera, comprise: image recombiner unit, be connected respectively with described Freescale IMX6 treater and described high-definition camera, for the prompting word corresponding with sleep state signals, frazzle signal or waking state signal is compound on described face-image to form combination picture; Image compression unit, is connected with described image recombiner unit, for carrying out compression of images to obtain compression combined image based on MPEG-4 compression standard to described combination picture; Wireless transmit/receive units, is connected with described image compression unit, for described compression combined image wireless being sent to the mobile terminal of chaufeur unit one belongs to local area network and chaufeur unit one belongs to responsible official; Described recent movement sensor connects vehicle steering, for detecting the quiescent duration of vehicle steering; Described brain wave detects the helmet and comprises: earth electrode, is positioned over the anterior mid point of head of chaufeur, for exclusive PCR; Reference electrode, as the electrode of chaufeur health Relative Zero potential point, adopts ears connection of hanging down to be positioned on the ear-lobe of chaufeur; Active electrode, is positioned on the scalp of chaufeur; Signal receiving unit, be connected respectively with described earth electrode, described reference electrode and described active electrode, the signal that described active electrode receives is deducted signal that described reference electrode receives to export as eeg signal, the sampling frequency of described eeg signal is 256Hz; Microcontroller, be connected with described signal receiving unit, α ripple wherein, β ripple and θ ripple is parsed from described eeg signal, described α wave frequency scope is 8-14Hz, described β wave frequency scope is 14-30Hz, described θ wave frequency scope is 4-8Hz, and horsepower rating is to obtain α wave power, β wave power and θ wave power respectively, is worth as the brain wave state-detection factor after α wave power and θ wave power are added divided by removing of β wave power acquisition; Described Freescale IMX6 treater detects the helmet with described SDRAM, described brain wave and described recent movement sensor is connected respectively, when the quiescent duration received is more than or equal to described threshold value rest time, get the hang of detecting pattern, when the quiescent duration received is less than described threshold value rest time, exit status detecting pattern; Wherein, described Freescale IMX6 treater is in state-detection pattern, when the brain wave state-detection factor is more than or equal to described first detecting factor threshold value, export sleep state signals, when the brain wave state-detection factor is less than described first detecting factor threshold value but is more than or equal to described second detecting factor threshold value, export tired status signal, when the brain wave state-detection factor is less than described second detecting factor threshold value, export waking state signal.
More specifically, in the described driver status recognition system detected based on bearing circle: described user input device is touch-screen or input keyboard.
More specifically, in the described driver status recognition system detected based on bearing circle, also comprise: display equipment, be connected with described Freescale IMX6 treater, for the prompting word that display is in real time corresponding with described sleep state signals, described tired status signal or described waking state signal.
More specifically, in the described driver status recognition system detected based on bearing circle: described display equipment is LCDs, and described user input device is the touch-screen integrated with described LCDs.
More specifically, in the described driver status recognition system detected based on bearing circle: described display equipment is also connected with described recent movement sensor, with the quiescent duration of real-time display automobile bearing circle.
Accompanying drawing explanation
Below with reference to accompanying drawing, embodiment of the present invention are described, wherein:
Fig. 1 is the block diagram of the driver status recognition system based on bearing circle detection illustrated according to an embodiment of the present invention.
Fig. 2 is the block diagram of the wireless communication interface of the driver status recognition system based on bearing circle detection illustrated according to an embodiment of the present invention.
Detailed description of the invention
Below with reference to accompanying drawings the embodiment of the driver status recognition system based on bearing circle detection of the present invention is described in detail.
Current, at the every country in the world, the owning amount of automobile is all a huge numeral, and because autonomous driving vehicle is not yet universal, automobile still mainly adopts manual type to drive, at this moment, if chaufeur is too tired and do not know, still carries out driving task, will be easy to cause traffic accident, to other people with self bring the actual bodily harm being difficult to bear, also may cause huge economic loss simultaneously.
In order to avoid driver tired driving; the traffic management system of various countries all have employed the chaufeur of some penalty mechanisms to fatigue driving and punishes; but; in fact; chaufeur is in driving procedure; reason tired out is caused to have multiple; the such as day before yesterday does not have enough sleep; or it is fascinated to listen to the music, even think that thing is superb etc., chaufeur is the fatigue state not understanding self sometimes; thus; depend penalty mechanism alone and chaufeur self-examination is not sufficient to the generation that avoids traffic accident, also need some detection of electrons means, carry out active detecting in the mode of instrument.
Driver status detection of electrons scheme of the prior art is all the detection of electrons of all the period of time, can not suit measures to local conditions to start or closed condition detection, easily causes system power consumption huge, and brings driving burden to driver whole process.
In order to overcome above-mentioned deficiency, the present invention has built a kind of driver status recognition system detected based on bearing circle, with the state of kinematic motion of bearing circle for trigger condition, avoid the whole process of detection of electrons to carry out, reduce the immoderation of system power dissipation and chaufeur largely.
Fig. 1 is the block diagram of the driver status recognition system based on bearing circle detection illustrated according to an embodiment of the present invention, described recognition system comprises recent movement sensor 1, brain wave detects the helmet 2, wireless communication interface 3 and Freescale IMX6 treater 4, described recent movement sensor 1 is for detecting the state of kinematic motion of vehicle steering, described brain wave detects the helmet 2 for detecting the brain wave feature of chaufeur, described Freescale IMX6 treater 4 and described recent movement sensor 1, described brain wave detects the helmet 2 and is connected respectively with described wireless communication interface 3, determine whether to start the detection operation that described brain wave detects the helmet 2 based on described state of kinematic motion, and after the described detection operation of startup, according to the current driving condition of the analysis result determination chaufeur to described brain wave feature, current driving condition is sent to described wireless communication interface 3.
Then, continue to be further detailed the concrete structure of the driver status recognition system based on bearing circle detection of the present invention.
Described recognition system also comprises: user input device, for the operation according to user, receive threshold value rest time of user's input, the first detecting factor threshold value and the second detecting factor threshold value, described first detecting factor threshold value is greater than described second detecting factor threshold value.
Described recognition system also comprises: SDRAM, connects described user input device, for receiving and storing threshold value described rest time, described first detecting factor threshold value and described second detecting factor threshold value.
Described recognition system also comprises: high-definition camera, comprise cmos sensor and secondary light source, described cmos sensor is taken to obtain face-image to chaufeur face, the shooting that described secondary light source is described cmos sensor provides illumination fill-in light, the intensity of described illumination fill-in light and the light luminance of described secondary light source surrounding environment are inversely proportional to, and the resolution of described face-image is 1280 × 720.
Described recognition system also comprises: power equipment supply, comprise solar powered device, storage battery, change-over switch and electric pressure converter, described change-over switch is connected respectively with described solar powered device and described storage battery, determine whether be switched to described solar powered device to be powered by described solar powered device according to storage battery dump energy, described electric pressure converter is connected with described change-over switch, with the 5V voltage transitions will inputted by change-over switch for 3.3V voltage.
As shown in Figure 2, described wireless communication interface 3 is connected respectively with described Freescale IMX6 treater 4 and described high-definition camera, comprises with lower component:
Image recombiner unit 31, be connected respectively with described Freescale IMX6 treater 4 and described high-definition camera, for the prompting word corresponding with sleep state signals, frazzle signal or waking state signal is compound on described face-image to form combination picture;
Image compression unit 32, is connected with described image recombiner unit 31, for carrying out compression of images to obtain compression combined image based on MPEG-4 compression standard to described combination picture;
Wireless transmit/receive units 33, is connected with described image compression unit 32, for described compression combined image wireless being sent to the mobile terminal of chaufeur unit one belongs to local area network and chaufeur unit one belongs to responsible official.
Described recent movement sensor 1 connects vehicle steering, for detecting the quiescent duration of vehicle steering.
Described brain wave detects the helmet 2 and comprises with lower component:
Earth electrode, is positioned over the anterior mid point of head of chaufeur, for exclusive PCR;
Reference electrode, as the electrode of chaufeur health Relative Zero potential point, adopts ears connection of hanging down to be positioned on the ear-lobe of chaufeur;
Active electrode, is positioned on the scalp of chaufeur;
Signal receiving unit, be connected respectively with described earth electrode, described reference electrode and described active electrode, the signal that described active electrode receives is deducted signal that described reference electrode receives to export as eeg signal, the sampling frequency of described eeg signal is 256Hz;
Microcontroller, be connected with described signal receiving unit, α ripple wherein, β ripple and θ ripple is parsed from described eeg signal, described α wave frequency scope is 8-14Hz, described β wave frequency scope is 14-30Hz, described θ wave frequency scope is 4-8Hz, and horsepower rating is to obtain α wave power, β wave power and θ wave power respectively, is worth as the brain wave state-detection factor after α wave power and θ wave power are added divided by removing of β wave power acquisition.
Described Freescale IMX6 treater 4 detects the helmet 2 with described SDRAM, described brain wave and described recent movement sensor 1 is connected respectively, when the quiescent duration received is more than or equal to described threshold value rest time, get the hang of detecting pattern, when the quiescent duration received is less than described threshold value rest time, exit status detecting pattern.
Wherein, described Freescale IMX6 treater 4 is in state-detection pattern, when the brain wave state-detection factor is more than or equal to described first detecting factor threshold value, export sleep state signals, when the brain wave state-detection factor is less than described first detecting factor threshold value but is more than or equal to described second detecting factor threshold value, export tired status signal, when the brain wave state-detection factor is less than described second detecting factor threshold value, export waking state signal.
Alternatively, in described recognition system: described user input device is touch-screen or input keyboard; Shown recognition system also comprises: display equipment, is connected with described Freescale IMX6 treater 4, for the prompting word that display is in real time corresponding with described sleep state signals, described tired status signal or described waking state signal; Described display equipment is LCDs, and described user input device is the touch-screen integrated with described LCDs; And described display equipment is also connected with described recent movement sensor 1, with the quiescent duration of real-time display automobile bearing circle.
In addition, field programmable gate array (FPGA) is programming device, and as compared to conventional logic circuit and gate array (as PAL, GAL and CPLD device), FPGA has different structures.FPGA utilizes small-sized look-up table (16 × 1RAM) to realize combinatory logic, each look-up table is connected to the input end of a d type flip flop, binary pair drives other decisions circuit again or drives I/O, thus constitute the basic logic unit module that not only can realize combination logic function but also can realize sequential logic function, these intermodules utilize metal connecting line to be connected to each other or are connected to I/O module.
As far back as 1980 mid-nineties 90s, FPGA takes root in PLD equipment.CPLD and FPGA includes the Programmadle logic unit of some relatively large amount.The density of CPLD logical gate is between several thousand to several ten thousand logical blocks, and FPGA normally arrives millions of several ten thousand.The key distinction of CPLD and FPGA is their system architecture.CPLD is a somewhat restrictive structure.This structure is arranged by the logical groups of one or more editable result sum and forms with the register of the locking of some relatively small amounts.Such result lacks editor's alerting ability, but but have the delay time and logical block that can estimate to the advantage of linkage unit height ratio.And FPGA has a lot of linkage units, although allow him edit more flexibly like this, structure is complicated many.The difference of CPLD and FPGA another one is that most FPGA contains high-level built-in module (such as adder and multiplier) and built-in memory body.Therefore relevant important difference be much new FPGA support completely or part system in reconfigure.Allow their design along with system upgrade or dynamically reconfigure and change.Some FPGA can allow a part for equipment update and other parts continue normal operation.
FPGA have employed the such concept of logical cell array LCA (LogicCellArray), and inside comprises configurable logic blocks CLB (ConfigurableLogicBlock), input/output module IOB (InputOutputBlock) and interconnector (Interconnect) three parts.
Adopt the driver status recognition system detected based on bearing circle of the present invention, cause power consumption large for existing recognition system pattern because there is no omnidistance detection, to the technical matters that chaufeur brings burden heavy, adopt recent movement sensor for detecting the state of kinematic motion of vehicle steering, with vehicle steering quiescent duration for trigger condition, trigger or suspend the state recognition to chaufeur, rely on actv. laboratory test data simultaneously, improve high-precision state recognition pattern, make the present invention while guarantee recognition effect, avoid the unnecessary consumption of power equipment supply electric power, improve the Driving of chaufeur.
Be understandable that, although the present invention with preferred embodiment disclose as above, but above-described embodiment and be not used to limit the present invention.For any those of ordinary skill in the art, do not departing under technical solution of the present invention ambit, the technology contents of above-mentioned announcement all can be utilized to make many possible variations and modification to technical solution of the present invention, or be revised as the Equivalent embodiments of equivalent variations.Therefore, every content not departing from technical solution of the present invention, according to technical spirit of the present invention to any simple modification made for any of the above embodiments, equivalent variations and modification, all still belongs in the scope of technical solution of the present invention protection.
Claims (2)
1. the driver status recognition system detected based on bearing circle, it is characterized in that, described recognition system comprises recent movement sensor, brain wave detects the helmet, wireless communication interface and Freescale IMX6 treater, described recent movement sensor is for detecting the state of kinematic motion of vehicle steering, described brain wave detects the helmet for detecting the brain wave feature of chaufeur, described Freescale IMX6 treater and described recent movement sensor, described brain wave detects the helmet and is connected respectively with described wireless communication interface, determine whether to start the detection operation that described brain wave detects the helmet based on described state of kinematic motion, and after the described detection operation of startup, according to the current driving condition of the analysis result determination chaufeur to described brain wave feature, current driving condition is sent to described wireless communication interface.
2., as claimed in claim 1 based on the driver status recognition system that bearing circle detects, it is characterized in that, described recognition system also comprises:
User input device, for the operation according to user, receive threshold value rest time of user's input, the first detecting factor threshold value and the second detecting factor threshold value, described first detecting factor threshold value is greater than described second detecting factor threshold value;
SDRAM, connects described user input device, for receiving and storing threshold value described rest time, described first detecting factor threshold value and described second detecting factor threshold value;
High-definition camera, comprise cmos sensor and secondary light source, described cmos sensor is taken to obtain face-image to chaufeur face, the shooting that described secondary light source is described cmos sensor provides illumination fill-in light, the intensity of described illumination fill-in light and the light luminance of described secondary light source surrounding environment are inversely proportional to, and the resolution of described face-image is 1280 × 720;
Power equipment supply, comprise solar powered device, storage battery, change-over switch and electric pressure converter, described change-over switch is connected respectively with described solar powered device and described storage battery, determine whether be switched to described solar powered device to be powered by described solar powered device according to storage battery dump energy, described electric pressure converter is connected with described change-over switch, with the 5V voltage transitions will inputted by change-over switch for 3.3V voltage;
Described wireless communication interface is connected respectively with described Freescale IMX6 treater and described high-definition camera, comprising:
Image recombiner unit, be connected respectively with described Freescale IMX6 treater and described high-definition camera, for the prompting word corresponding with sleep state signals, frazzle signal or waking state signal is compound on described face-image to form combination picture;
Image compression unit, is connected with described image recombiner unit, for carrying out compression of images to obtain compression combined image based on MPEG-4 compression standard to described combination picture;
Wireless transmit/receive units, is connected with described image compression unit, for described compression combined image wireless being sent to the mobile terminal of chaufeur unit one belongs to local area network and chaufeur unit one belongs to responsible official;
Described recent movement sensor connects vehicle steering, for detecting the quiescent duration of vehicle steering;
Described brain wave detects the helmet and comprises:
Earth electrode, is positioned over the anterior mid point of head of chaufeur, for exclusive PCR;
Reference electrode, as the electrode of chaufeur health Relative Zero potential point, adopts ears connection of hanging down to be positioned on the ear-lobe of chaufeur;
Active electrode, is positioned on the scalp of chaufeur;
Signal receiving unit, be connected respectively with described earth electrode, described reference electrode and described active electrode, the signal that described active electrode receives is deducted signal that described reference electrode receives to export as eeg signal, the sampling frequency of described eeg signal is 256Hz;
Microcontroller, be connected with described signal receiving unit, α ripple wherein, β ripple and θ ripple is parsed from described eeg signal, described α wave frequency scope is 8-14Hz, described β wave frequency scope is 14-30Hz, described θ wave frequency scope is 4-8Hz, and horsepower rating is to obtain α wave power, β wave power and θ wave power respectively, is worth as the brain wave state-detection factor after α wave power and θ wave power are added divided by removing of β wave power acquisition;
Described Freescale IMX6 treater detects the helmet with described SDRAM, described brain wave and described recent movement sensor is connected respectively, when the quiescent duration received is more than or equal to described threshold value rest time, get the hang of detecting pattern, when the quiescent duration received is less than described threshold value rest time, exit status detecting pattern;
Wherein, described Freescale IMX6 treater is in state-detection pattern, when the brain wave state-detection factor is more than or equal to described first detecting factor threshold value, export sleep state signals, when the brain wave state-detection factor is less than described first detecting factor threshold value but is more than or equal to described second detecting factor threshold value, export tired status signal, when the brain wave state-detection factor is less than described second detecting factor threshold value, export waking state signal;
Described user input device is touch-screen or input keyboard;
Described recognition system also comprises:
Display equipment, is connected with described Freescale IMX6 treater, for the prompting word that display is in real time corresponding with described sleep state signals, described tired status signal or described waking state signal;
Described display equipment is LCDs, and described user input device is the touch-screen integrated with described LCDs;
Described display equipment is also connected with described recent movement sensor, with the quiescent duration of real-time display automobile bearing circle.
Priority Applications (1)
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105411571A (en) * | 2016-01-02 | 2016-03-23 | 无锡桑尼安科技有限公司 | High-speed rail driver early warning platform based on physiological parameter analysis |
| CN108670241A (en) * | 2018-06-27 | 2018-10-19 | 华南理工大学 | A kind of novel flexible printing veneer electrod-array |
| CN108778878A (en) * | 2016-04-22 | 2018-11-09 | 马自达汽车株式会社 | Vehicle movement control device |
| CN110742602A (en) * | 2019-10-15 | 2020-02-04 | 武汉理工大学 | Method for recognizing aggressive driving state based on electroencephalogram and vehicle driving data |
| CN111619572A (en) * | 2019-02-27 | 2020-09-04 | 操纵技术Ip控股公司 | Lane change assistant |
| US11931998B2 (en) | 2018-07-02 | 2024-03-19 | Rasei Limited | Moveable and wearable items, and systems and methods for monitoring or controlling such items |
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| CN105083296A (en) * | 2015-08-05 | 2015-11-25 | 深圳市航盛电子股份有限公司 | Safe driving assistance system and method based on BLE and wearable device |
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| JP7010259B2 (en) * | 2019-03-20 | 2022-02-10 | カシオ計算機株式会社 | Imaging equipment, imaging methods and programs |
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| CN108778878B (en) * | 2016-04-22 | 2021-09-24 | 马自达汽车株式会社 | Behavior control device for vehicle |
| CN108670241A (en) * | 2018-06-27 | 2018-10-19 | 华南理工大学 | A kind of novel flexible printing veneer electrod-array |
| US11931998B2 (en) | 2018-07-02 | 2024-03-19 | Rasei Limited | Moveable and wearable items, and systems and methods for monitoring or controlling such items |
| CN111619572A (en) * | 2019-02-27 | 2020-09-04 | 操纵技术Ip控股公司 | Lane change assistant |
| CN110742602A (en) * | 2019-10-15 | 2020-02-04 | 武汉理工大学 | Method for recognizing aggressive driving state based on electroencephalogram and vehicle driving data |
Also Published As
| Publication number | Publication date |
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| CN104802800B (en) | 2016-08-31 |
| CN105172794B (en) | 2017-06-23 |
| CN104802800A (en) | 2015-07-29 |
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