WO2014041758A1 - Dispositif de surveillance d'état - Google Patents

Dispositif de surveillance d'état Download PDF

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Publication number
WO2014041758A1
WO2014041758A1 PCT/JP2013/005163 JP2013005163W WO2014041758A1 WO 2014041758 A1 WO2014041758 A1 WO 2014041758A1 JP 2013005163 W JP2013005163 W JP 2013005163W WO 2014041758 A1 WO2014041758 A1 WO 2014041758A1
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WIPO (PCT)
Prior art keywords
state
driver
light
unit
light emitting
Prior art date
Application number
PCT/JP2013/005163
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English (en)
Japanese (ja)
Inventor
卓矢 辰己
Original Assignee
株式会社デンソー
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Publication date
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Publication of WO2014041758A1 publication Critical patent/WO2014041758A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K28/00—Safety devices for propulsion-unit control, specially adapted for, or arranged in, vehicles, e.g. preventing fuel supply or ignition in the event of potentially dangerous conditions
    • B60K28/02—Safety devices for propulsion-unit control, specially adapted for, or arranged in, vehicles, e.g. preventing fuel supply or ignition in the event of potentially dangerous conditions responsive to conditions relating to the driver
    • B60K28/06—Safety devices for propulsion-unit control, specially adapted for, or arranged in, vehicles, e.g. preventing fuel supply or ignition in the event of potentially dangerous conditions responsive to conditions relating to the driver responsive to incapacity of driver
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/0059—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence
    • A61B5/0077—Devices for viewing the surface of the body, e.g. camera, magnifying lens
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/16—Devices for psychotechnics; Testing reaction times ; Devices for evaluating the psychological state
    • A61B5/18—Devices for psychotechnics; Testing reaction times ; Devices for evaluating the psychological state for vehicle drivers or machine operators
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/48—Other medical applications
    • A61B5/4806—Sleep evaluation
    • A61B5/4809—Sleep detection, i.e. determining whether a subject is asleep or not
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
    • A61B5/11—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb
    • A61B5/1103—Detecting eye twinkling

Definitions

  • the present disclosure relates to a state monitoring device that is mounted on a moving body and monitors the state of a driver who controls the moving body.
  • a state monitoring device that monitors the state of a driver of a vehicle has a configuration that generates a face image obtained by photographing a face by receiving light incident from a specified area where the face of the driver is located.
  • the imaging apparatus disclosed in Patent Document 1 which is a kind of such a configuration is provided with a projector that emits near-infrared light from a near-infrared LED toward a specified region. Therefore, the photographing apparatus can generate a facial image using light emitted from the near-infrared LED and reflected by the face even in an environment with little external light.
  • the inventor of the present application has focused on the fact that in the state monitoring device adopting the photographing device of Patent Document 1 as it is, the generation of a facial image by the photographing device is continued even when the operator is clearly awake. . That is, in such a state monitoring device, the time for which the near-infrared LED is turned off is not extended even in a state where the operator is unlikely to fall asleep. In addition, the current for causing the near-infrared LED to emit light is very strong. As a result, the heat generation due to the light emission of the light emitting portion has increased.
  • the present disclosure has been made in view of the above, and an object of the present disclosure is to provide a state monitoring device capable of reducing heat generation due to light emission of the light emitting unit while reliably monitoring the state of the operator. Is to provide.
  • a state monitoring device is a state monitoring device that is mounted on a moving body and monitors a state of a driver who controls the moving body, and is a specified region that is defined in advance as a region where the face of the driver is located.
  • a light emitting unit for emitting light, an imaging unit for generating a facial image obtained by photographing the face by receiving light incident from the specified region, and a pilot based on the result of the image processing of the facial image A state determination unit that determines whether or not the vehicle is in an awake state, and a light emission control unit that extends a time during which the light emission unit is turned off when the state determination unit determines that the pilot is in the awake state It is equipped with.
  • the state determination unit determines that the state determination unit is in the awake state based on the result of the image processing of the facial image generated by the imaging unit. I do. Then, the light emitting unit extends the time during which the light emitting unit that emits light toward the specified region is turned off. In this way, by making the light emitting unit refrain from light emission under a state where there is a low possibility that the pilot will fall asleep, the state monitoring device can reliably emit light from the light emitting unit while monitoring the state of the pilot. The resulting heat generation can be reduced.
  • FIG. 1 is a diagram for describing an arrangement of a state monitoring device according to an embodiment of the present disclosure in a vehicle.
  • FIG. 2 is a block diagram for explaining the electrical configuration of the state monitoring apparatus.
  • FIG. 3 is a perspective view for explaining the mechanical configuration of the imaging apparatus.
  • FIG. 4 is a diagram schematically illustrating an example of a face image.
  • FIG. 5 is a functional block diagram of the control device.
  • FIG. 6 is a flowchart illustrating processing performed by the state determination unit.
  • FIG. 7 is a time chart showing the operation of the light emission control block.
  • the state monitoring apparatus 100 is mounted on a vehicle 1 as a “moving body” and controls the state of a driver (hereinafter referred to as “driver”) who controls the vehicle. It is a driver status monitor to be monitored.
  • the state monitoring device 100 includes an imaging device 10, a control device 20, and the like. As shown in FIG. 2, the state monitoring device 100 is connected to an actuation unit 90 mounted on the vehicle.
  • the imaging device 10 shown in FIGS. 1 and 2 is a device that is installed, for example, on the upper surface of the steering column 81 and generates a facial image 50 (see also FIG. 4) obtained by photographing the driver's face.
  • the imaging device 10 captures a predefined area PA defined in advance in the vehicle 1.
  • This prescribed area PA includes an area in which the face of the driver sitting on the driver's seat is assumed to be located.
  • a defined area PA is defined based on the eyelips assumed from the eye range of each eye of the driver, and is defined to include, for example, the 99th percentile of the eyelips.
  • the imaging device 10 includes a light emitting unit 15, an imaging unit 11, an imaging control unit 13, and a housing 60 (see FIG. 3) that houses these configurations.
  • the light emitting unit 15 includes a plurality of light emitting diodes 16 that emit light having a wavelength including a wavelength in the near infrared region. Each light emitting diode 16 is disposed so as to sandwich the imaging unit 11 (see FIG. 3).
  • the light emitting unit 15 is supplied with a current for causing the light emitting diode 16 to emit light and a control signal for controlling an on state and an off state of the light emitting diode 16 from the control device 20. By supplying the current and the control signal, the light emitting unit 15 emits near infrared light from each light emitting diode 16 toward the specified region PA.
  • the imaging unit 11 is configured by combining an imaging element, an optical lens, an optical filter, and the like.
  • the imaging unit 11 generates an electrical signal corresponding to the intensity of the received light by each pixel arranged in the imaging element.
  • the image pickup unit 11 is arranged in a posture in which the image pickup surface of the image pickup element is directed to the defined area PA.
  • the imaging unit 11 receives near-infrared light that is incident from the defined area PA and is emitted from the light-emitting unit 15 and reflected by the driver's face.
  • the imaging unit 11 captures the driver's face and outputs it to the imaging control unit 13 as an electrical signal.
  • the imaging control unit 13 is connected to the control device 20 and the imaging unit 11.
  • the imaging control unit 13 controls shooting timing, sensitivity, exposure time, and the like in the imaging unit 11 based on a control signal acquired from the control device 20.
  • the imaging control unit 13 generates a facial image 50 (see also FIG. 4) obtained by imaging the driver's face from the electrical signal acquired from the imaging unit 11.
  • the imaging control unit 13 sequentially outputs the generated face image 50 toward the control device 20.
  • the housing 60 includes a circuit board 61 on which the light emitting unit 15 and the imaging unit 11 and the like are mounted, a main body member 63 that holds the circuit board 61, and a light-shielding property that is attached to the housing main body member 63.
  • a cover member 66 is provided.
  • the main body member 63 is provided with an insertion hole 64 and a light distribution portion 65.
  • the insertion hole 64 is provided in the central portion of the main body member 63 in the horizontal direction, and allows the imaging unit 11 mounted on the circuit board 61 to be inserted.
  • the light distribution unit 65 is disposed so as to sandwich the insertion hole 64 in the horizontal direction, and faces the light emitting unit 15 mounted on the circuit board 61.
  • the light distribution unit 65 distributes light to the defined area PA (see FIG. 1) while transmitting the light emitted from the light emitting unit 15.
  • the visible light filter 67 is provided on the cover member 66.
  • the visible light filter 67 transmits light in the near-infrared region used for generating the facial image 50 (see FIG. 4) and blocks light in the visible light region that is unnecessary for generating the facial image 50.
  • the visible light filter 67 covers an opening 68 formed at a position facing the light distribution unit 65 in the cover member 66.
  • the control device 20 controls the operation of the imaging device 10 and the actuation unit 90.
  • the control device 20 is mainly configured by a microcomputer including a processor 21 that performs various arithmetic processes, a RAM 22 that functions as a work area for the arithmetic processes, and a flash memory 23 that stores programs used for the arithmetic processes. ing.
  • the control device 20 includes each of the components 21 to 23 and a power supply circuit 24 that supplies power to the imaging device 10.
  • the actuation unit 90 includes, for example, a speaker 91, a seat vibration device 93, an air conditioner 95, and the like mounted on the vehicle 1 (see FIG. 1).
  • the speaker 91 alerts the driver by reproducing audio data based on a control signal from the control device 20.
  • the seat vibration device 93 is installed inside the seat surface of the driver's seat or the like, and alerts the driver by vibrating the driver's seat based on a control signal from the control device 20.
  • the air conditioner 95 alerts the driver by an operation such as introducing outside air into the vehicle 1 based on a control signal from the control device 20.
  • the control device 20 includes, as functional blocks related to light emission control of the light emitting unit 15, a light emission control block 31 including a current supply unit 32 and a signal supply unit 33, and an image processing block including an eye closure determination unit 38 and a drowsiness value calculation unit 39. 37 and a state determination unit 35.
  • the current supply unit 32 supplies a current for light emission to the light emitting unit 15 through the current supply line 41.
  • the signal supply unit 33 supplies the light emitting unit 15 with a control signal for switching the light emission on state and the off state through the signal supply line 43.
  • the light emission control block 31 turns off the control signal output from the signal supply unit 33 in accordance with the timing at which the imaging unit 11 captures the face while the current supply unit 32 supplies current to the light emission unit 15. Switch from state to on state. With such light emission control, when the face image 50 is captured, the near infrared ray necessary for the capturing is irradiated to the defined area PA.
  • a period in which the light emitting unit 15 repeats between an off state and an off state based on a control signal from the signal supply unit 33 is referred to as a “lighting enabled period”.
  • the image processing block 37 performs image processing of the face image 50 acquired from the imaging control unit 13.
  • the closed eye determination unit 38 determines whether or not the driver's eyes are closed. Specifically, the eye closing determination unit 38 extracts the contours of both eyes of the driver through image processing on the face image 50, and calculates the degree of eye opening corresponding to the degree of opening of each eye. When the calculated degree of eye opening is higher than a predetermined eye opening threshold, the eye closing determination unit 38 determines that the driver is in the eye opening state. On the other hand, when the degree of eye opening is lower than a predefined eye closing threshold, the eye closing determination unit 38 determines that the driver is in an eye closed state.
  • the eye closing determination unit 38 determines that the state is the intermediate state.
  • the closed eye determination unit 38 determines the current closed eye state of the driver at a cycle of about several seconds, and outputs the determination result to the state determination unit 35.
  • the drowsiness value calculation unit 39 quantifies the drowsiness of the driver and acquires it as a drowsiness value. Specifically, the sleepiness value calculation unit 39 extracts the contours of the driver's face, both eyes, mouth, and the like, and the direction of the line of sight by image processing on the face image 50. The drowsiness value calculation unit 39 classifies the driver's sleepiness into five levels as follows based on the movement speed of the line of sight, the blinking speed and period, the movement of the mouth, the inclination of the face, and the like. ⁇ Drowsiness value 1. It ’s not sleepy at all > The line of sight moves quickly and frequently. ⁇ Drowsiness value 2. Somewhat sleepy> The movement of eye movement becomes slow.
  • the sleepiness value calculation unit 39 determines the driver's current sleepiness value from the driver's action extracted by image processing, for example, in a cycle of about 1 minute, and outputs this sleepiness value to the state determination unit 35.
  • the state determination unit 35 acquires the determination result by the closed eye determination unit 38 and the sleepiness value digitized by the sleepiness value calculation unit 39. Then, the state determination unit 35 determines whether or not the driver is in an awake state based on these analysis results.
  • the arousal state determination process by the state determination unit 35 will be described in detail based on FIG. 6 with reference to FIG. The process shown in FIG. 6 is started by the state determination unit 35 when the ignition of the vehicle 1 (see FIG. 1) is turned on.
  • S101 x1 is substituted into the algebra X used for time counting in S103 described later, and the process proceeds to S102.
  • S102 it is determined whether or not the ignition is on. If a negative determination is made in S102 because the ignition is turned off, the process is terminated. On the other hand, if a positive determination is made in S102, the process proceeds to S103.
  • S103 it is determined whether or not the time assigned to the algebra X has elapsed after the determination in S102. For example, in the first S103 after the ignition is switched to the on state, it is determined whether or not x1 minutes (for example, about 10 minutes) have elapsed. In the course of x1 minutes, the control device 20 performs a process for recognizing the position of the face while causing the light emitting unit 15 to emit pulses, for example, as a process for initialization. When X minutes have elapsed in S103, the process proceeds to S104.
  • x1 minutes for example, about 10 minutes
  • the determination result regarding the closed eye state is acquired from the closed eye determination unit 38, and the process proceeds to S105.
  • S105 it is determined from the determination result acquired in S104 whether the driver is in an eye-closed state. If the acquired determination result indicates a closed eye state, the process proceeds to S106 so that the driver is not determined to be in an awake state.
  • x2 is substituted for the algebra X, and the process returns to S102.
  • the acquired determination result indicates something other than the closed eye state (open eye state or intermediate state)
  • the process proceeds to S107.
  • the sleepiness value is acquired from the sleepiness value calculation unit 39, and the process proceeds to S108.
  • S108 it is determined whether or not the sleepiness value acquired in S107 is equal to or greater than a predetermined threshold value.
  • the acquired sleepiness value is “2 (somewhat sleepy)” or more
  • the process proceeds to S109 so as not to determine that the driver is in an awake state.
  • x3 is substituted for the algebra X, and the process returns to S102.
  • the acquired sleepiness value is less than the above threshold value, that is, “1 (not likely to sleep at all)”, it is determined that the driver is in an awake state, and the process proceeds to S110.
  • the determination result indicating that the driver is in an awake state is output to the light emission control block 31, and after Y minutes have elapsed, the process proceeds to S111.
  • x4 is substituted for the algebra X, and the process returns to S102.
  • the values x2 to x4 assigned to the algebra X in S106, S109, and S111 described above are used for the subsequent processing of S103, and determine the length of the lighting possible period.
  • the light emission control block 31 shown in FIG. 5 extends the time during which the light emitting unit 15 is turned off.
  • the operation of the light emission control block 31 for extending the OFF state of the light emitting unit 15 will be described in detail based on the time chart of FIG. 7 with reference to FIG.
  • Time t1 is a time during the initialization process of the control device 20.
  • the light emitting unit 15 can be switched between the on state and the off state based on the control signal.
  • the control device 20 acquires the face image 50 obtained by correctly photographing the face by turning on the light emitting diode 16 in accordance with the timing when the imaging unit 11 captures the face.
  • the face image 50 is still being taken even during the above-mentioned turn-off maintenance period.
  • the irradiation of the near infrared ray to the defined area PA is interrupted. Therefore, it is difficult to capture the face image 50 suitable for image processing. Therefore, the control device 20 does not perform image processing on these images 50 even if the facial images 50 captured during the extinguishing maintenance period are acquired.
  • Time t3 is the time when the Y minute extinguishing maintenance period has elapsed.
  • the light emission control block 31 switches the current supply unit 32 from the off state to the on state based on the fact that Y minutes have elapsed since the acquisition of the determination result indicating the awake state.
  • x4 is substituted for the algebra X in S111 (see FIG. 6)
  • the lighting possible period is continued for x4 minutes.
  • the state determination unit 35 determines whether or not the driver is in an awake state based on the result of image processing of the face image 50 captured during the lighting-enabled period.
  • the extinguishing maintenance period is set longer than the lighting possible period.
  • the values of x2 to x4 that are substituted into the algebra X in S106, S109, and S111 shown in FIG. 6 and determine the lighting possible period are larger than the values of Y that determine the extinction maintaining period. It has been made smaller.
  • the state monitoring apparatus 100 can reduce heat generation of circuits such as the current supply unit 32 caused by light emission while reliably monitoring the driver's state.
  • the function of setting the extinguishing maintenance period can contribute to extending the life of the state monitoring apparatus 100.
  • the state monitoring apparatus 100 can accurately detect a sign that the driver falls asleep based on the closed eye state and the drowsiness value. Therefore, the implementation of the control for extending the OFF state of the light emitting unit 15 can be limited to the case where the driver is surely in the awake state.
  • the closed eye state used for the determination of the arousal state is an analysis of signs that the driver falls asleep in units of several seconds.
  • the sleepiness value is an analysis of signs that the driver falls asleep in minutes.
  • the light emission control block 31 can reliably implement the extension of the time during which the light emitting unit 15 is turned off without changing the mode of the control signal output from the signal supply unit 33. Therefore, complication of control performed by the signal supply unit 33 can be avoided. For this reason, in order to provide the extinction maintaining period, it is preferable to control the current supply to the light emitting unit 15 by turning off the current supply unit 32.
  • the extinguishing maintenance period is longer than the lighting possible period, the circuit of the control device 20 that exhibits the function of the current supply unit 32 and the amount of heat generated in each light emitting diode 16 are It is further reduced. Further, since the time for cooling the circuit of the control device 20 and each light emitting diode 16 can be secured, the state monitoring device 100 can acquire high reliability.
  • the vehicle 1 corresponds to an example of a moving body.
  • the light emitting unit 15 corresponds to an example of a light emitting unit (light emitting unit).
  • the imaging unit 11 and the imaging control unit 13 cooperate to correspond to an example of an imaging unit (imaging unit).
  • the light emission control block 31 corresponds to an example of a light emission control unit (light emission control unit).
  • the state determination unit 35 corresponds to an example of a state determination unit (state determination unit).
  • the closed eye determination unit 38 corresponds to an example of an closed eye determination unit (an closed eye determination unit).
  • the sleepiness value calculation unit 39 corresponds to an example of a sleepiness value acquisition unit (sleepiness value acquisition unit).
  • the drowsiness value calculation unit 39 is omitted.
  • the state determination unit determines that the driver is in an awake state based on the determination result by the closed eye determination unit being in the open state.
  • the determination result by the closed eye determination unit is either the closed eye state or the intermediate state
  • the state determination unit 35 does not determine that the state is the awake state. According to the above processing, even if the drowsiness value calculation unit is omitted, the state determination unit can determine with high accuracy whether or not the driver is in an awake state.
  • the closed eye determination unit 38 is omitted.
  • the state determination unit 35 determines that the sleepiness value classified by the sleepiness value acquisition unit is “2” or more and that the sleepiness value is “1”. Do not determine that you are awake. According to the above process, even if the closed eye determination unit is omitted, the state determination unit can determine with high accuracy whether or not the driver is in an awake state.
  • the threshold value to be compared with the sleepiness value is not limited to “2 (somewhat sleepy)” and may be changed as appropriate.
  • the determination as to whether or not the driver is awake may be performed based on criteria different from the determination result of the closed eye state and the calculation result of the sleepiness value.
  • the light emission control block extends the time for which the light emitting unit 15 is turned off by changing the mode of the control signal output from the signal supply unit to the light emitting unit. In this way, the light emission control block can set the extinguishing maintenance period by eliminating the part that is turned on in the control signal output from the signal supply unit 33 without turning the current supply unit off. it can.
  • the extinguishing maintenance period may be shorter than the lighting possible period.
  • at least one value of x2 to x4 is set larger than the value of Y.
  • the values x2 to x4 and the value x1 may be changed as appropriate. Further, the magnitude relationship between the values of x1 to x4 may be changed as appropriate.
  • a current control circuit for controlling the current supplied to the light emitting unit 15 is provided separately from the control device.
  • the current control circuit controls light emission of the light emitting unit 15 based on a control signal from the control device.
  • the current control circuit is switched to the off state when it is determined that the user is in the awake state. Accordingly, it is possible to set the extinguishing maintenance period.
  • the current supplied from these components to the light emitting unit may not be completely zero.
  • a small current that does not cause the light emitting unit to emit light completely or slightly emits light from the light emitting unit may be supplied to the light emitting unit when the light emitting unit is turned off.
  • an image sensor such as a CCD (Charge Coupled Device) or a CMOS (Complementary Metal Oxide Semiconductor) can be used as appropriate as the image sensor of the imaging unit.
  • the frequency region of light detected by the image sensor is not limited to the near infrared region, and may be a visible light region or the like.
  • the light emitting diode provided in the light emitting unit is appropriately changed in the frequency region, the number, the arrangement, and the like of the emitted light so as to correspond to the specification of the imaging element.
  • the installation position of the imaging device 10 that is the upper surface of the steering column 81 may be changed as appropriate as long as the imaging of the defined area PA is possible.
  • the imaging device may be installed on the upper surface of the instrument panel, for example, or may be attached to a ceiling portion near the sun visor.
  • the method for determining the prescribed area PA in the above embodiment may be changed as appropriate.
  • the defined area PA may be defined to include the 95th percentile of Ilips.
  • the method for determining the prescribed area PA is not limited to the method for determining from the iris.
  • the prescribed area PA may be determined experimentally by actually sitting a plurality of drivers of different races, genders, ages, etc. on the driver's seat. Such a defined area PA is desirably defined in consideration of the movement of the face accompanying the driving operation.
  • the plurality of functions provided by the control device 20 that has executed the program may be provided by hardware and software different from the above-described control device, or a combination thereof.
  • a function corresponding to each functional block may be provided by an analog circuit or a digital circuit that performs a predetermined function without depending on a program.
  • the state monitoring device mounted on the vehicle and monitoring the state of the driver of the vehicle is exemplified.
  • the technical concept of the present disclosure is applied not only to the so-called driver status monitor for a vehicle, but also to a state monitoring device that monitors the state of the operator in various moving bodies (transportation equipment) such as ships and aircraft other than the vehicle. It is possible to apply.

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Abstract

L'invention concerne un dispositif de surveillance d'état permettant de surveiller l'état d'un conducteur tout en réduisant la chaleur générée par l'émission de lumière. Ce dispositif de surveillance d'état (100) reçoit, au moyen d'une unité d'imagerie (11), la lumière réfléchie par le visage d'un conducteur, et génère une image faciale (50). D'après le résultat du traitement de l'image faciale (50), une unité de détermination d'état (35) détermine si le conducteur est dans un état d'éveil. Lorsqu'il est déterminé que le conducteur est dans un état d'éveil, un bloc de commande d'émission de lumière (31) prolonge la période pendant laquelle une unité émettrice de lumière (15) est arrêtée. L'émission de lumière provenant de l'unité émettrice de lumière (15) peut donc être restreinte lorsque le conducteur est dans un état où il y a peu de risques qu'il s'endorme.
PCT/JP2013/005163 2012-09-17 2013-09-02 Dispositif de surveillance d'état WO2014041758A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2012203776A JP2014059684A (ja) 2012-09-17 2012-09-17 状態監視装置
JP2012-203776 2012-09-17

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WO2014041758A1 true WO2014041758A1 (fr) 2014-03-20

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Cited By (1)

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Publication number Priority date Publication date Assignee Title
CN109543491A (zh) * 2017-09-21 2019-03-29 厦门歌乐电子企业有限公司 一种疲劳驾驶监测装置和方法

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Publication number Priority date Publication date Assignee Title
KR102308658B1 (ko) * 2020-09-16 2021-10-05 (주) 캔랩 운전자의 움직임을 모니터링 하기 위한 적외선 led를 작동시키는 방법 및 상기 적외선 led를 포함하는 운전자 감시 시스템

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