EP1394756B1 - Vorrichtung zur Überwachung und Beeinflussung der Wachsamkeit eines Fahrzeugführers - Google Patents

Vorrichtung zur Überwachung und Beeinflussung der Wachsamkeit eines Fahrzeugführers Download PDF

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Publication number
EP1394756B1
EP1394756B1 EP02019380A EP02019380A EP1394756B1 EP 1394756 B1 EP1394756 B1 EP 1394756B1 EP 02019380 A EP02019380 A EP 02019380A EP 02019380 A EP02019380 A EP 02019380A EP 1394756 B1 EP1394756 B1 EP 1394756B1
Authority
EP
European Patent Office
Prior art keywords
vehicle driver
sun visor
light
driver
image recording
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.)
Expired - Lifetime
Application number
EP02019380A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1394756A1 (de
Inventor
Uwe Peter Dipl.-Ing. Braun
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to DK02019380T priority Critical patent/DK1394756T3/da
Priority to DE50207570T priority patent/DE50207570D1/de
Priority to PT02019380T priority patent/PT1394756E/pt
Priority to EP02019380A priority patent/EP1394756B1/de
Priority to ES02019380T priority patent/ES2269572T3/es
Priority to AT02019380T priority patent/ATE333688T1/de
Publication of EP1394756A1 publication Critical patent/EP1394756A1/de
Application granted granted Critical
Publication of EP1394756B1 publication Critical patent/EP1394756B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

Definitions

  • the invention relates to a device for monitoring and influencing the alertness of a driver according to the preamble of claim 1.
  • the image evaluation system includes means for Lidschlußerkennung, with which an increasing temporary closing of the eyes can be determined, which is interpreted as increasing fatigue ,
  • the image evaluation system is assigned a warning system device which generates a warning signal for the vehicle driver as a function of a detected state of tiredness.
  • the apparatus includes an infrared imaging imaging system for capturing images of the area of an eye of the vehicle operator.
  • the device further comprises an image evaluation system that evaluates images taken by the image recording system and, depending on the distance crossed by the eyelids, one on the visual field the vehicle driver directed lighting device controls to counteract fatigue of the driver.
  • the present invention has for its object to provide a device which not only monitors the vigilance of a driver to warn him when onset of fatigue, but to counteract the onset of fatigue of the driver at night driving.
  • the invention has for its object to provide such a device which effectively counteracts fatigue of the driver.
  • the device according to the invention is characterized in that its illumination device controlled by an image evaluation system emits radiation in the UV-A spectrum in order to counteract fatigue of the vehicle driver.
  • the invention provides an automatic monitoring system that illuminates the eyes of the driver when onset of tiredness with light of a radiation spectrum, which prevents sleep hormone secretion as much as possible.
  • the image recording system comprises a camera, which is not visibly arranged for the driver of the vehicle.
  • the sometimes perceived as disturbing impression of monitoring is prevented, which can emanate from visible cameras.
  • the camera can preferably be arranged behind a one-sided transparent mirror or splitter mirror.
  • the camera is associated with a deflection optics, via which the camera detects the field of vision of the vehicle driver.
  • a deflection optics results in a greater degree of freedom with regard to the installation location of the camera.
  • the camera can thus be mounted in places that provide sufficient space, but do not allow direct alignment of the camera on the field of vision of the driver.
  • the deflecting optics can be adjusted by means of an automatic control as a function of the seating position and / or the size of the vehicle driver. This ensures that the camera always continuously detects at least one eye of the respective driver, even if this changes its seating position or when a driver change between different sized people has taken place.
  • Another advantageous embodiment of the device according to the invention is to provide them with an electronic control and at least one light sensor which detects the brightness of the environment of the vehicle driver steered by the electronic control of the emitted light from the illumination device in dependence on the on the light sensor falling light radiation of the environment is controlled.
  • This configuration ensures that the illumination device is automatically switched on when darkness sets in or during longer tunnel journeys, and that a basic illumination in the form of visible, diffused light, including infrared light, emitted in the direction of the driver's field of vision.
  • a further advantageous embodiment of the device according to the invention is to provide them with an electronic control and at least one light sensor which detects the light radiation of an external glare source, wherein the light radiation emitted by the illumination device by means of the electronic control in dependence on the incident on the light sensor light radiation the external glare source is controlled.
  • the device according to the invention additionally assumes the function of preventing blinding of the vehicle driver during after-rides or longer tunnel journeys by oncoming vehicles.
  • a particularly preferred embodiment of the device according to the invention is characterized in that at least the image pick-up system and the lighting device are integrated in a pivotable sun visor associated with the driver, wherein the image evaluation system, which can be arranged outside the sun visor or also in the sun visor, via a data and Supply terminal is connected to the image pickup system and the lighting device.
  • this embodiment allows a summary of all the essential parts of the device in a single piece of equipment that can be prefabricated as a supply part and as such does not increase the effort in the Entmontage of the relevant vehicle ,
  • a further advantageous embodiment of the invention is that the sun visor each having a divider mirror on both sides, wherein the image pickup system in an unfolded position of the sun visor on one divider mirror and in a retracted position of the sun visor on the other divider mirror images of the area at least one eye of the driver receives.
  • Figures 1 and 2 show a driver 1 on the steering wheel 2 of a motor vehicle.
  • the driver 1 is as usual associated with a pivotable sun visor 3, wherein Fig. 1 shows the situation in which the sun visor 3 is in its retracted position. This situation usually corresponds to the situation during a night drive or a longer tunnel trip.
  • the sun visor 3 is provided with an image acquisition system comprising an infrared illumination for taking pictures of the area of at least one eye of the vehicle driver 1. Furthermore, an image evaluation system is available which evaluates images recorded by the image recording system and, depending on a change in the visible size of the corneal surface, the blinking frequency and / or the blinking duration of the eye, drives an illumination device 4 directed or alignable to the field of vision of the vehicle driver 1 broad-area emitted a light fatigue of the vehicle driver counteracting light.
  • the determination of a critical state of fatigue of the vehicle driver 1 can be based in particular on the so-called corneal reflection method in which the degree of reflection of the cornea (cornea), which depends on the degree of opening of the eyelid, is measured.
  • the image evaluation system can be realized by a suitable computer (computer) or microprocessor with memory device.
  • the image evaluation system can also be integrated in the sun visor 3. However, it can also be arranged at a different location in the vehicle.
  • the computer or microprocessor is then in dialogue via a data and voltage supply connection with the electro-optical and electronic components of the sun visor 3.
  • the image evaluation system is also connected to a warning signal device (not shown), which warns the vehicle driver 1 by an optical and / or acoustic warning signal when the image evaluation system has detected a critical state of tiredness.
  • the image pickup system includes a miniature camera 5 having a CCD photosensitive array, a lens, a diaphragm, and a focusing device.
  • the camera 5, which is arranged invisibly in the sun visor 3 for the vehicle driver 1, detects the visual field 6 of the vehicle driver 1 via a deflection optics 7 in the form of a mirror, which is preferably convex.
  • a divider mirror 9 is further arranged, which covers an opening within the wall or shell of the sun visor 3 and is visible to the driver 1 (see Figures 4 and 5).
  • a second corresponding divider mirror 10 is arranged on the opposite side of the sun visor 3 and also visible to the driver when the sun visor 3 is unfolded.
  • the two divider mirrors 9, 10 are arranged so that the camera 5 receives images of the area of at least one eye of the vehicle driver 1 in the folded-in position of the sun visor 3 via the divider mirror 9 and in the unfolded position over the divider mirror 10.
  • the deflection mirror 7 is movably mounted.
  • the spatial position of the deflecting mirror 7 is set automatically by means of an engine 11 and a transmission 12 having actuator depending on the seating position or the size of the driver 1.
  • the motor 11 of the actuator is controlled by the image evaluation system.
  • the image evaluation system stores one or more reference images that correspond to a visual field to be detected (face pattern).
  • the image evaluation system compares the images taken by the camera 5 with the reference images and adjusts the deflecting mirror 7 at a deviation exceeding a specific limit between recorded images and reference image until the recorded images match the reference image (s) again to a certain extent.
  • the illumination device 4 of the device according to the invention preferably consists of a plate-shaped, substantially rectangular light guide, which has a broad-area light exit surface.
  • the light guide is made of glass or a glassy plastic, such as acrylic glass.
  • the light guide preferably has a reflective coating or printing on. In the illustrated embodiment takes the light exit surface over half of a flat side of the sun visor 3 a. It is arranged only on the side of the sun visor 3, which points in the unfolded position of the sun visor 3 in the direction of travel.
  • a light-emitting diode strip 13 is arranged, by means of the visible light (light from the full spectrum) is coupled into the light guide.
  • a light-emitting diode strip 14 and 15 are arranged.
  • a light-emitting diode strip 16 which emits UV light.
  • UV-A radiation having a wavelength in the range of 320 to 400 nm is emitted.
  • the upper edge of the sun visor 3 has an opening into which a light sensor 17 is embedded.
  • the light sensor 17 is used to detect the external brightness and is connected to an electronic control, by means of which the intensity of the visible and invisible light radiation emitted by the illumination device 4 is controlled as a function of the incident on the light sensor 17 light radiation of the environment.
  • the computer or microprocessor of the image evaluation system comprises this electronic control.
  • two further light sensors 18, 19 are arranged on the upper edge of the sun visor 3 on the right and left.
  • the light sensors 18, 19 are used to detect the light radiation of oncoming vehicles or external glare sources during night driving and longer tunnel trips.
  • the light sensors 18, 19 are connected to an electronic control, which controls at least the visible light radiation emitted by the illumination device 4 as a function of the light radiation of the glare source falling on the light sensors 18, 19.
  • the emitted UV radiation can also be controlled as a function of the detected glare radiation.
  • the computer or microprocessor of the image evaluation system also assumes this control.
  • Denoted at 20 is an on-off switch.
  • the light exit surface does not face the visual field 6 of the vehicle driver 1.
  • the sun visor 3 is usually unfolded only during trips a day, namely, when the sun dazzles the driver. Even in the unfolded position, however, the camera 5 can detect the visual field 6 of the vehicle driver 1 via the divider mirror 10.
  • the unfolded position of the sun visor 3 ensures that a warning signal is delivered to him by a suitable optical and / or acoustic signaling device in response to a detected by the image evaluation fatigue state of the driver 1.

Landscapes

  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
  • Traffic Control Systems (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
  • Auxiliary Drives, Propulsion Controls, And Safety Devices (AREA)
  • Studio Devices (AREA)
EP02019380A 2002-08-29 2002-08-29 Vorrichtung zur Überwachung und Beeinflussung der Wachsamkeit eines Fahrzeugführers Expired - Lifetime EP1394756B1 (de)

Priority Applications (6)

Application Number Priority Date Filing Date Title
DK02019380T DK1394756T3 (da) 2002-08-29 2002-08-29 Indretning til overvågning og påvirkning af en motorförers årvågenhed
DE50207570T DE50207570D1 (de) 2002-08-29 2002-08-29 Vorrichtung zur Überwachung und Beeinflussung der Wachsamkeit eines Fahrzeugführers
PT02019380T PT1394756E (pt) 2002-08-29 2002-08-29 Sistema para controlar e influenciar a vigilância do condutor de um veículo
EP02019380A EP1394756B1 (de) 2002-08-29 2002-08-29 Vorrichtung zur Überwachung und Beeinflussung der Wachsamkeit eines Fahrzeugführers
ES02019380T ES2269572T3 (es) 2002-08-29 2002-08-29 Dispositivo para supervisar e influir sobre la vigilancia de un conductor.
AT02019380T ATE333688T1 (de) 2002-08-29 2002-08-29 Vorrichtung zur überwachung und beeinflussung der wachsamkeit eines fahrzeugführers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP02019380A EP1394756B1 (de) 2002-08-29 2002-08-29 Vorrichtung zur Überwachung und Beeinflussung der Wachsamkeit eines Fahrzeugführers

Publications (2)

Publication Number Publication Date
EP1394756A1 EP1394756A1 (de) 2004-03-03
EP1394756B1 true EP1394756B1 (de) 2006-07-19

Family

ID=31197859

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02019380A Expired - Lifetime EP1394756B1 (de) 2002-08-29 2002-08-29 Vorrichtung zur Überwachung und Beeinflussung der Wachsamkeit eines Fahrzeugführers

Country Status (6)

Country Link
EP (1) EP1394756B1 (es)
AT (1) ATE333688T1 (es)
DE (1) DE50207570D1 (es)
DK (1) DK1394756T3 (es)
ES (1) ES2269572T3 (es)
PT (1) PT1394756E (es)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2237237B1 (en) 2009-03-30 2013-03-20 Tobii Technology AB Eye closure detection using structured illumination
DE102015007362B4 (de) 2015-06-10 2019-12-05 Audi Ag Kombinationsinstrument für ein Kraftfahrzeug und Kraftfahrzeug
DE202017004151U1 (de) 2017-07-05 2017-10-23 Uwe Braun Sicherheitsbrille zur Verbesserung der Reaktionszeit
CN108133572A (zh) * 2017-12-25 2018-06-08 合肥思艾汽车科技有限公司 一种驾驶员疲劳驾驶预警装置
CN109496309B (zh) * 2018-08-07 2022-05-03 深圳市汇顶科技股份有限公司 疲劳状态的检测方法、装置及设备

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2215040A (en) * 1988-02-13 1989-09-13 William George David Ritchie A method and apparatus for monitoring the driver of a vehicle
DE29607558U1 (de) * 1996-04-26 1996-07-18 Neumeister, Reiner, 42697 Solingen Vorrichtung zur Überwachung einer Bedienungsperson
DE10003643A1 (de) * 2000-01-28 2001-08-02 Reitter & Schefenacker Gmbh Überwachungseinrichtung für Fahrzeuge, vorzugsweise für Kraftfahrzeuge
WO2002050792A1 (en) * 2000-12-21 2002-06-27 Todor Stankovic The procedure and device intended for the man-machine system security preservation under a man's drowsiness conditions

Also Published As

Publication number Publication date
ES2269572T3 (es) 2007-04-01
PT1394756E (pt) 2006-12-29
DE50207570D1 (de) 2006-08-31
DK1394756T3 (da) 2006-11-13
EP1394756A1 (de) 2004-03-03
ATE333688T1 (de) 2006-08-15

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