CN203055098U - Device for preventing driver from fatigue driving - Google Patents
Device for preventing driver from fatigue driving Download PDFInfo
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- CN203055098U CN203055098U CN 201220667629 CN201220667629U CN203055098U CN 203055098 U CN203055098 U CN 203055098U CN 201220667629 CN201220667629 CN 201220667629 CN 201220667629 U CN201220667629 U CN 201220667629U CN 203055098 U CN203055098 U CN 203055098U
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Abstract
The utility model discloses a device for preventing a driver from fatigue driving. The device comprises a camera, a video decoder, a digital signal processor and an alarm, wherein the camera is connected with the video decoder, the video decoder is connected with SDRAM through A/D converter, the SDRAM and connected with the digital signal processor, and the digital signal processor is connected with a buzzer. A PER-CLOS fatigue detection method based on machine vision is employed, and near infrared light source is added. The object zone is directly fixed on human eyes by utilizing red eye effect, which prevents a complex conventional process of finding eyes after locating a human face. The PER-CLOS method features non-contact property, and the near infrared light source is invisible. In this way, the system may not disturb the driver. The device does not disturb the driver, is not affected by extraneous environment, and is high in accuracy. The device is suitable for carrying out real-time fatigue detection during driving.
Description
Technical field
The utility model belongs to the car steering security fields, relates to a kind of device of anti-driver tired driving.
Background technology
Though fatigue is a normal physiological phenomenon, to this special colony of driver, just may cause serious consequence, even threat to life, therefore the monitoring to fatigue is very important.In early days to the objective test and appraisal of driving fatigue mainly from medical angle, by medical electroencephalograph, electrocardiograph, the brain wave patterns of electromyograph(EMG test driver, ecg wave form, myoelectric waveform, thereby determine its degree of fatigue.Although this method is more accurate, the test condition harshness, the process complexity is difficult for applying.In in the past 10 years, driving fatigue test and appraisal Study on Technology is caused the generally attention of many countries gradually, but up to the present, automobile driver driving fatigue test and appraisal technology does not also reach ripe stage, the practical and reliable system does not release as yet.
Summary of the invention
At the deficiency that prior art exists, the purpose of this utility model is, a kind of device of anti-driver tired driving is provided.
In order to realize above-mentioned task, the utility model adopts following technical scheme to be achieved:
A kind of device of anti-driver tired driving, comprise camera, Video Decoder, digital signal processor and alarm, wherein, camera links to each other with Video Decoder, Video Decoder links to each other with SDRAM by A/D converter, SDRAM links to each other with digital signal processor, and digital signal processor links to each other with hummer.
The utility model also has following technical characterstic:
Described digital signal processor adopts the DM6437 digital signal processor.
Described Video Decoder adopts the TVP5146 video decoding chip.
Described camera adopts the COMS camera.
The utility model adopts the PER-CLOS fatigue detecting method based on machine vision, and adds near-infrared light source, utilizes the red-eye effect of human eye, directly the target area is scheduled human eye, has avoided deciding in the classic method complex process that people's face is looked for human eye.PER-CLOS method itself just has untouchable, and near-infrared light source is again invisible light, so this system can not cause interference to the driver.The utlity model has noiseless to the driver, be affected by the external environment little and high accuracy for examination, be adapted at carrying out in the car steering real-time fatigue detecting.
Description of drawings
Fig. 1 is annexation synoptic diagram of the present utility model.
Fig. 2 is workflow synoptic diagram of the present utility model.
Below in conjunction with drawings and Examples particular content of the present utility model is done explanation in further detail.
Embodiment
Below provide specific embodiment of the utility model, need to prove that the utility model is not limited to following specific embodiment, all equivalents of doing on present techniques scheme basis all fall into protection domain of the present utility model.
PERCLOS is the measurement index of spiritual physiological fatigue degree that generally acknowledge, effective, and it refers to that the eyes closed degree surpasses time of 80% and accounts for the percent of unit interval.The PERCLOS computing formula is as follows:
Unit interval is t.When the eyes closed degree surpasses 80%, P (t)=1, on the contrary be 0.N is the available frame count of gathering in the t time.T is tired evaluation coefficient.If PERCLOS greater than 40% (T), just thinks that the driver is in fatigue state.The PERCLOS formula calculates needs parameter to have: eyes normally open maximal value and unit interval t.Processing procedure of the present utility model is to determine position of human eye by the parity frame difference image, and then judges eye state.Because the time between the parity frame is short especially, less than time nictation, so the state of eyes of every judgement is assert by this system, just represent the human eye state that parity frame is gathered in the image for this twice again.Like this, in the utility model, the frame number that PER-CLOS is defined as eyes closed state in the unit interval (30s) accounts for the number percent of the available frame count of collection, if PER-CLOS, thinks then that the driver is in fatigue state greater than 40%.
Defer to technique scheme, as shown in Figure 1, a kind of device of anti-driver tired driving, comprise camera, Video Decoder, digital signal processor and alarm, wherein, camera links to each other with Video Decoder, and Video Decoder links to each other with SDRAM by A/D converter, SDRAM links to each other with digital signal processor, and digital signal processor links to each other with hummer.Described digital signal processor adopts the DM6437 digital signal processor; Described video decoding chip adopts the TVP5146 video decoding chip; Described camera adopts the COMS camera.
When the utility model is in running order, as shown in Figure 2, after the utility model powers up startup, at first carries out the pupil image collection by camera and it is handled, carry out the human eye location then.After navigating to eyes, camera passes to digital signal processor through after the video decoder decodes with signal with the eye image that collects, digital signal processor obtains the degree of closing of opening of eyes by the human eye detection algorithm, calculate the eye state feature, comprise eyes closed time, frequency of wink and PERCLOS value etc., and contrast the correlationship of each parameter and fatigue.When the digital signal processor judged result is the PERCLOS value greater than 40% the time, just judge that the driver is in fatigue state, when this kind state duration during greater than 3 seconds, digital signal processor just sends control signal control buzzer warning, reminds the driver to note fatigue driving.
Claims (4)
1. the device of an anti-driver tired driving, it is characterized in that, comprise camera, Video Decoder, digital signal processor and alarm, wherein, camera links to each other with Video Decoder, Video Decoder links to each other with SDRAM by A/D converter, and SDRAM links to each other with digital signal processor, and digital signal processor links to each other with hummer.
2. the device of anti-driver tired driving as claimed in claim 1 is characterized in that, described digital signal processor adopts the DM6437 digital signal processor.
3. the device of anti-driver tired driving as claimed in claim 1 is characterized in that, described Video Decoder adopts the TVP5146 video decoding chip.
4. the device of anti-driver tired driving as claimed in claim 1 is characterized in that, described camera adopts the COMS camera.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220667629 CN203055098U (en) | 2012-12-03 | 2012-12-03 | Device for preventing driver from fatigue driving |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220667629 CN203055098U (en) | 2012-12-03 | 2012-12-03 | Device for preventing driver from fatigue driving |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203055098U true CN203055098U (en) | 2013-07-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220667629 Expired - Fee Related CN203055098U (en) | 2012-12-03 | 2012-12-03 | Device for preventing driver from fatigue driving |
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| CN (1) | CN203055098U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103735278A (en) * | 2013-12-25 | 2014-04-23 | 中国科学院苏州生物医学工程技术研究所 | Method for objectively detecting dangerous driving behaviors |
| CN104240446A (en) * | 2014-09-26 | 2014-12-24 | 长春工业大学 | Fatigue driving warning system on basis of human face recognition |
-
2012
- 2012-12-03 CN CN 201220667629 patent/CN203055098U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103735278A (en) * | 2013-12-25 | 2014-04-23 | 中国科学院苏州生物医学工程技术研究所 | Method for objectively detecting dangerous driving behaviors |
| CN103735278B (en) * | 2013-12-25 | 2016-03-09 | 中国科学院苏州生物医学工程技术研究所 | A kind of method of objective detection dangerous driving behavior |
| CN104240446A (en) * | 2014-09-26 | 2014-12-24 | 长春工业大学 | Fatigue driving warning system on basis of human face recognition |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130710 Termination date: 20131203 |