JP2016167189A - Drunken state detector and room mirror device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drunken state detector capable of easily detecting a drunken state of a person sit on a driver seat and a room mirror device including the same.SOLUTION: The drunken state detector includes: an eye imaging section 25 that takes an image of an eye of a person sits on a driver seat; a flash light source 26 for emitting a beam of flash light to the eye of the person sits on the driver seat; and a control unit 24 that detects the pupil from the image of the eye of the person taken by the eye imaging section 25 and determines the drunken state of the person sits on the driver seat on the basis of the time of the beam of flash light which is emitted from the flash light source 26 and reflected on the pupil.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a drunk detection device that detects drunkness and a room mirror device including the same, and more particularly to a drunk detection device that uses light reflection of a pupil and a room mirror device including the same.

  In recent years, in the automobile industry, development competitions for safe driving support functions for supporting safe driving of automobiles such as a collision avoidance function, a collision reduction function, and an automatic parking function have been actively performed. However, these functions are only auxiliary functions for supporting safe driving of automobiles, and have not led to fundamental human error prevention.

  On the other hand, automobile accidents caused by human errors, particularly automobile accidents caused by drunk driving by drivers, are increasing year by year. Therefore, in order to prevent a car accident caused by drunk driving, it is important to inspect whether the driver has drunk before driving.

  Here, as a conventional general drinking detection method, there is known an alcohol component detection device that determines the presence or absence of drinking by collecting the breath of a driver and measuring the alcohol concentration in the breath (for example, Patent Documents). 1).

JP 2004-245800 A

  However, the alcohol component detection device described in Patent Document 1 requires a task of collecting the breath of the driver, and there is a problem that it takes time to determine whether or not alcohol is consumed. In particular, it is very troublesome for the driver to cause the driver to perform such work before driving, and the driver may start driving without performing alcohol detection using the alcohol component detection device.

  Therefore, an object of the present invention is to provide a drunk detection device capable of easily detecting drunkness of a person sitting in a driver's seat and a room mirror device including the same.

  The present invention relates to an eye picking device for photographing the eyes of a person sitting in a driver's seat, a flash emitting means for emitting a flash toward the eyes of the person sitting in the driver's seat, and the eye photographing means Detecting a pupil from a video image of a person's eyes photographed by the step, and determining an alcoholic state of a person sitting in the driver's seat based on a light reflection time of a pupil emitted by the flash emission means And a judging means.

  In addition, the present invention is characterized in that the room mirror device includes the above-described drunkenness detection device and a room mirror body that reflects the rear of the vehicle.

  ADVANTAGE OF THE INVENTION According to this invention, the drunk detection apparatus which can detect the drunk of the person who sat in the driver's seat easily, and a room mirror apparatus provided with the same can be provided.

It is a mimetic diagram of a room mirror device concerning an embodiment of the present invention. It is a functional block diagram of the room mirror device concerning this embodiment. It is explanatory drawing explaining the method to detect a pupil from the image | video of the image | photographed eye. It is a figure which shows the change of the pupil in light reflection. It is a figure which shows typically the use condition of the room mirror apparatus which concerns on this embodiment. It is a flowchart which shows drunk detection by the room mirror apparatus which concerns on this embodiment.

  Hereinafter, a drunk detection device according to an embodiment of the present invention will be described with reference to the drawings. In the following embodiments, a description will be given using a room mirror (hereinafter, referred to as “room mirror device”) 1 with a drunk detection function as an example of a drunk detection device.

  First, a schematic configuration of the room mirror device 1 according to the present embodiment will be described with reference to FIGS. 1 and 2. FIG. 1 is a schematic diagram of a room mirror device 1 according to an embodiment of the present invention. FIG. 2 is a functional block diagram of the room mirror device 1 according to the present embodiment.

  As shown in FIG. 1, the rearview mirror device 1 includes a rearview mirror body 10 that reflects the outside of the vehicle behind the vehicle from the inside of the vehicle, and a person sitting in the driver's seat (hereinafter, a person sitting in the driver's seat is referred to as a “driver”). And a drunkenness detection module 20 capable of detecting the drunkenness state.

  The room mirror body 10 includes a substantially rectangular mirror housing 11 and a substantially rectangular mirror 12 attached to the front surface of the mirror housing 11. In addition, the front of the mirror housing | casing 11 means the surface facing the driver who sat in the driver's seat, ie, the surface which faced the back of the vehicle.

  The mirror housing 11 is attached to the windshield 14 of the vehicle via a fixture 13, and the fixture 13 supports the mirror housing 11 so that the orientation of the mirror 12 attached to the mirror housing 11 can be adjusted. doing. That is, the rearview mirror main body 10 is configured such that the mirror housing 11 can be adjusted to an easy-to-see position behind the vehicle reflected on the mirror 12 by moving the mirror housing 11 via the fixture 13 while the driver looks at the mirror 12. ing.

  The drunk detection module 20 includes a module main body 21, an operation switch 22 for operating the module main body 21, a connection portion 23 for connecting the module main body 21 and the vehicle, and a control unit for controlling the module main body 21. 24).

  The module main body 21 is disposed below the driver's seat side in front of the mirror housing 11 and is located at the lower right of the rear mirror main body 10 when viewed from the driver. By positioning the module main body 21 at the lower right of the room mirror main body 10, it is possible to reduce the possibility that the module main body 21 interferes and the rear of the vehicle becomes difficult to see even when the rear of the vehicle is reflected on the mirror 12.

  The module main body 21 may be arranged on the back side of the mirror 12 (between the mirror housing 11 and the mirror 12) with the mirror 12 of the room mirror main body 10 as a magic mirror. By using the mirror 12 as a magic mirror and disposing the module main body 21 on the back side of the mirror 12, the module main body 21 is prevented from interfering with the rearward visual recognition by the mirror 12. In this case, the module main body 21 may be disposed on the back side of the substantially central portion of the mirror 12. By disposing the mirror 12 on the back side of the substantially central portion, when the driver adjusts the orientation of the mirror 12 (hereinafter simply referred to as “mirror adjustment”), the driver indirectly sees the module body 21. The driver's pupil can be easily detected.

  The module main body 21 includes an eye photographing unit (eye photographing unit, person specifying unit) 25 for photographing the driver's eyes, a flash light source (flash emitting unit) 26 for emitting a flash toward the driver, and a face for photographing the driver's face. An imaging unit (person identification means) 27 and a speaker 28 that outputs a predetermined warning sound are provided.

  The eye photographing unit 25 is a near-infrared camera that photographs a plurality of near-infrared LEDs (infrared light sources) 25a that radiate near-infrared rays toward the eyes of the driver and the eyes (pupil, iris, etc.) of the driver that radiates near-infrared rays. (Infrared camera) 25b. The plurality of near-infrared LEDs 25a are arranged so as to surround the periphery of the near-infrared camera 25b. In the present embodiment, the near-infrared camera 25b is disposed in the center, and a plurality of near-infrared LEDs 25a are disposed so as to surround the periphery thereof. The eye photographing unit 25 can photograph the eyes of the driver with the near-infrared camera 25b without being affected by the surrounding brightness by arranging the plurality of near-infrared LEDs 25a so as to surround the near-infrared camera 25b. .

  The flash light source 26 is disposed adjacent to the eye photographing unit 25. The face photographing unit 27 is adjacently disposed below the eye photographing unit 25 and the flash light source 26. The speaker 28 is disposed adjacent to the face photographing unit 27. As described above, the module body 21 includes the eye photographing unit 25, the flash light source 26, the face photographing unit 27, and the speaker 28, which are adjacent to each other and are downsized as a whole.

  The operation switch 22 is attached to the mirror housing 11 and is disposed so as to protrude upward from the upper surface on the left side of the mirror housing 11 so that it can be easily pressed by a driver during mirror adjustment. ing. The operation switch 22 outputs an operation signal to the control unit 24 when pressed by the driver.

  The connection unit 23 is configured to be connectable to a vehicle. By connecting to the vehicle, the connection unit 23 supplies power to the module main body 21 and provides vehicle information (for example, on / off of the engine) to the control unit 24. You can do that. In addition, by connecting the connecting portion 23 to the vehicle, the control of the engine start of the vehicle by the control portion 24 can be executed.

  As shown in FIG. 2, the control unit 24 includes a setup processing unit 24a, a pupil parameter detection unit 24b, an iris authentication determination processing unit 24c, a normal pupil parameter holding unit 24d, a difference determination unit 24e, and an engine stop determination. A unit 24f and a driver determination unit 24g.

  When the operation signal output from the operation switch 22 is input when the operation switch 22 is pressed, the setup processing unit 24a outputs a predetermined signal to the pupil parameter detection unit 24b and the iris authentication determination processing unit 24c. Specifically, the setup processing unit 24a outputs a light reflection time measurement signal to the pupil parameter detection unit 24b, and outputs an iris authentication signal to the iris authentication determination processing unit 24c.

  When the pupil parameter detection unit 24b receives the light reflection time measurement signal output from the setup processing unit 24a, the pupil parameter detection unit 24b measures the light reflection time (pupil parameter) of the driver's pupil. Specifically, the eye of the driver is photographed by the eye photographing unit 25 of the module main body 21, and the pupil of the driver is detected. The detection of the pupil will be described in detail later. When the pupil is detected, the flash light source 26 emits flash light toward the eyes of the driver while the pupil is photographed, and the light reflection time of the pupil is measured. When the pupillary light reflection time is measured, the pupil parameter detection unit 24b outputs the measured pupillary light reflection time to the difference determination unit 24e.

  When the iris authentication determination processing unit 24c receives the iris authentication signal output from the setup processing unit 24a, the iris authentication determination processing unit 24c causes the eye photographing unit 25 of the module body 21 to photograph the eyes of the driver, and identifies the iris pattern that appears on the driver's eyeball. Identify the driver. Then, the driver identification signal of the identified driver is output to the normal pupil parameter holding unit 24d. The iris authentication determination processing unit 24c identifies the driver by causing the face photographing unit 27 of the module body 21 to photograph the driver's face, and outputs a driver identification signal of the identified driver to the normal pupil parameter holding unit 24d. It may be.

  When the normal pupil parameter holding unit 24d receives the driver identification signal output from the iris authentication determination processing unit 24c, the normal pupil light reflection of the identified driver is selected from a plurality of normal light reflection times measured in advance. Extract time. Further, the normal pupil parameter holding unit 24d, when there is no normal light reflection time of the identified driver (when it is not held as data), a plurality of normal light reflection times measured in advance. Extract the average time. When the normal pupil parameter holding unit 24d extracts the normal light reflection time or the normal light reflection average time of the identified driver, the normal pupil parameter holding unit 24d outputs the extracted time to the difference determination unit 24e.

  The difference determination unit 24e calculates the difference between the light reflection time output from the pupil parameter detection unit 24b and the normal light reflection time or the normal light reflection average time output from the normal pupil parameter holding unit 24d. calculate. If the difference is longer than the predetermined time, it is determined that the driver is in a drunk state, and a drunk detection signal is output to the engine stop determining unit 24f. Note that the determination of the alcoholic state based on the light reflection time will be described in detail later. In addition, when the difference determination unit 24e determines that the driver is not in a drunk state, the difference determination unit 24e outputs a face authentication signal to the driver determination unit 24g.

  When the engine stop determination unit 24f receives the alcohol detection signal output from the difference determination unit 24e, the engine stop determination unit 24f stops the engine when the vehicle engine is operating, and restricts subsequent engine start.

  When the face determination signal output from the difference determination unit 24e is input, the driver determination unit 24g causes the face photographing unit 27 to photograph the driver's face and authenticates the driver's face. Then, when the driver is changed, the driver determination unit 24g outputs a driver change signal to the setup processing unit 24a, and causes the setup processing unit 24a to perform the above-described drunk detection.

  Here, the detection method of the above-mentioned pupil and the determination that the state is drunk based on the light reflection time will be described with reference to FIGS. 3 and 4. FIG. First, a pupil detection method for detecting the pupil 101 from the captured image of the eye 100 will be described with reference to FIG. FIG. 3 is an explanatory diagram for explaining a method for detecting the pupil 101 from the photographed image of the eye 100.

  In the present embodiment, the driver's pupil 101 is detected using corneal reflection generated by irradiating the driver's eyes 100 with near infrared rays. Hereinafter, a method for detecting the pupil 101 of the driver will be specifically described.

  First, near infrared rays are emitted toward the driver's eyes 100 with a plurality of near infrared LEDs 25a, and the driver's eyes 100 are photographed with a near infrared camera 25b. Next, as shown in FIG. 3, an image of the driver's eye 100 taken by the near-infrared camera 25 b and having a white and nearly circular shape (substantially white circle) in the driver's eye 100 is used as the corneal reflection. Are extracted as candidates 102a to 102d. At this time, all possible corneal reflection candidates are extracted.

  Similarly, from the image of the driver's eye 100 photographed by the near-infrared camera 25b, a black and nearly circular shape (substantially black circle) in the driver's eye 100 is extracted as pupil candidates 101a and 101b. .

  When the candidates 102a to 102d for corneal reflection are extracted, it seems that they are obviously different from the positions of the plurality of near-infrared LEDs 25a, the near-infrared camera 25b and the face, the position, size and shape of the corneal reflection specified in the past, glasses reflection, etc. Corneal reflection candidates 102 b to 102 d are deleted, and the last remaining corneal reflection candidate 102 a is specified as the corneal reflection 102.

  Next, among the extracted pupil candidates 101a and 101b, the positions of a plurality of near-infrared LEDs 25a, near-infrared cameras 25b and faces, the positions, sizes, and shapes of pupils specified in the past are considered to be clearly different. The candidate pupil 101 b is deleted, and the candidate pupil 101 a located in the vicinity of the identified corneal reflection 102 is specified as the pupil 101.

  By using the above-described method, for example, when photographing a driver's eyes, if a small and inexpensive near-infrared camera and near-infrared LED are used, the image captured by the driver's eyes becomes dark and unclear, and the pupil However, the pupil can be easily detected even when a small and inexpensive near-infrared camera and near-infrared LED are used.

  Next, the determination that the state is drunken based on the light reflection time (detection of drunkenness based on the light reflection time) will be described with reference to FIG. FIG. 4 is a diagram showing changes in the pupil in the light reflection.

  Here, the light reflection refers to a series of reactions in which the pupil is dilated after miosis when a light stimulus is momentarily given to the pupil. It is known that the behavior of the pupil is closely related to nerve activity and is performed by controlling each of the sympathetic nerve and the parasympathetic nerve.

FIG. 4 shows the pupil diameter that changes due to the irradiation of the flash light source 26 and the change time thereof. Each parameter is defined as follows.
Initial pupil diameter: Sinit (pupil size before flash light source irradiation)
Maximum pupil size: ΔS (smallest pupil diameter from flash light source irradiation)
Total miosis time: T ₁ (time until ΔS)
Pupil diameter return time: T ₂ (Time to return to the original pupil diameter)
Intermediate mydriatic time: T ₃ (intermediate time in the process from the smallest pupil diameter to the original pupil diameter)

Of the above parameters, when drinking, especially, it slowed the pupil diameter return time T ₂ and the intermediate mydriasis time T _3, the reaction is sluggish than normal. Therefore, in the present embodiment, the difference between the detected pupil diameter return time T ₂ and the normal pupil diameter return time T ₂ ′, and the detected intermediate mydriatic time T ₃ and the normal intermediate mydriatic time T _When the difference from ₃ ′ is 60% or more of the normal time, the driver is determined to be drunk.

  Next, a method of using the room mirror device 1 configured as described above will be described along the flowchart shown in FIG. 6 with reference to FIG. The room mirror device 1 is attached to the windshield 14 of the vehicle 2 in advance. In addition, the drunk detection module 20 is connected to the vehicle 2 in advance, and can be activated even when the engine of the vehicle 2 is not operating. FIG. 5 is a diagram schematically illustrating a usage state of the room mirror device 1 according to the present embodiment. FIG. 6 is a flowchart showing detection of drunkness by the room mirror device 1 according to the present embodiment.

  As shown in FIG. 5, when the driver sits on the driver's seat 3, the driver presses the operation switch 22 attached to the mirror housing 11. Then, the driver performs mirror adjustment while moving the mirror housing 11. When the driver performs mirror adjustment, the driver looks directly at the mirror 12. That is, the module main body 21 is in a state of facing the driver.

  When the operation switch is pressed, the module main body 21 is activated, and detection of drunkness is started. Specifically, first, the near infrared LEDs 25a radiate near infrared rays toward the eyes of the driver who is looking at the mirror 12 (step S1). When the near-infrared ray is emitted, the near-infrared camera 25b takes an image of the driver's eyes (step S2), and detects a pupil from the taken image of the eye (step S3). The pupil is specified by the method described above. At this time, since the plurality of near-infrared LEDs 25a are arranged so as to surround the near-infrared camera, the near-infrared camera 25b can photograph the eyes (pupil) of the driver without being affected by ambient light.

  When the pupil is detected, the flash light source 26 emits a flash toward the driver's eyes (step S4). When the flashlight is emitted, the driver's pupil performs light reflection, and the light reflection time is measured from the image of the pupil photographed by the near-infrared camera (step S5).

  Further, apart from specifying the pupil from the driver's eye image by the near-infrared camera 25b, the driver's iris pattern is detected from the driver's eye image (step S6). When the iris pattern is detected, a driver is identified from the detected iris pattern (YES in step S7), and the normal light reflection time of the identified driver is extracted (step S8). On the other hand, if the driver cannot be identified (NO in step S7), the average time of normal light reflection time (normal light reflection average time) stored in advance is extracted (step S9).

  Next, from the difference between the measured light reflection time and the normal light reflection time or the normal light reflection average time of the specified driver, the driver is in a drunken state using the method described above. It is determined whether or not there is (steps S10 and S11). Here, if it is determined that the driver is drunk (YES in step S11), a predetermined warning sound is output from the speaker 28 of the module body 21 (step S12). As a result, the driver recognizes that he is drunk.

  If the engine of the vehicle 2 is on (YES in step S13), the engine of the vehicle 2 is turned off to prevent the engine from starting by restricting engine start (steps S14 and S15). On the other hand, when the engine of the vehicle is not running (NO in step S13), only engine start restriction is performed. Thereby, when the driver is in a drunk state, the vehicle cannot be driven, and the drunk detection is terminated.

  On the other hand, when it is determined that the driver is not in a drunk state (NO in step S11), the drunk detection is terminated without restricting engine starting or the like. That is, the driver can drive the vehicle engine as it is.

  As described above, the room mirror device 1 according to the present embodiment is capable of detecting drunkness based on the light reflection time of the pupil of the person sitting in the driver's seat 3. Therefore, for example, it is possible to detect drunkness without performing work such as collecting exhalation of a person sitting in the driver's seat 3. Moreover, troublesomeness such as waiting for several minutes after blowing exhalation can be eliminated. Thereby, for example, it is possible to prevent a person sitting in the driver's seat 3 from driving the vehicle without detecting drunkenness. As a result, drunk driving by the driver can be prevented, and traffic accidents can be reduced.

  In addition, since the room mirror device 1 detects alcoholic beverages based on the light reflection time of the pupil of the person sitting in the driver's seat 3, variations in detection of alcoholic beverages due to individual differences are unlikely to occur. That is, it is possible to perform stable alcohol detection. As a result, drunk driving by the driver can be suitably prevented, and traffic accidents can be reduced.

  In the rearview mirror device 1, a module main body 21 and an operation switch 22 are attached to a rearview mirror main body 10 that reflects the rear of the vehicle. Therefore, for example, when a person sitting in the driver's seat 3 performs mirror adjustment, drunk detection can be performed at the same time. That is, a person sitting in the driver's seat 3 can detect drunkenness by simply performing a normal operation performed before driving. Thereby, for example, it is possible to prevent a person sitting in the driver's seat 3 from driving the vehicle without detecting drunkenness.

  Further, the room mirror device 1 can make the alcoholic detection module 20 inconspicuous because the alcoholic detection module 20 is provided in the room mirror body 10. In addition, a new place for installing the drunk detection module 20 is not required.

  Moreover, the room mirror apparatus 1 detects a pupil using corneal reflection when near infrared rays are emitted. Therefore, for example, the pupil can be detected even when an inexpensive near-infrared camera, a near-infrared LED, or the like is used. That is, when detecting the pupil, it is possible to detect drunk without using an expensive or highly accurate infrared camera or infrared light source. Thereby, an inexpensive drunk detection device can be provided.

Also, room mirror device 1, as a parameter of drunk detection uses a pupil diameter return time T ₂ and the intermediate mydriasis time T _3. Pupil diameter return time T ₂ and the intermediate mydriasis time T ₃ is not only immediately after drinking, even after more than a few hours after drinking is a parameter significantly indicating the drinking level. Therefore, drunk driving by the driver can be suitably prevented, and traffic accidents can be reduced.

  Moreover, the room mirror apparatus 1 is arrange | positioned so that the some near-infrared LED25a may surround the circumference | surroundings of the near-infrared camera 25b. Therefore, the driver's eyes can be photographed by the near-infrared camera 25b without being affected by ambient brightness (for example, ambient light such as sunlight, streetlights, and light sources of vehicles running at night). Further, the module main body 21 can also be reduced in size.

  The room mirror device 1 also includes a face photographing unit that photographs the driver's face and authenticates the driver. Therefore, for example, even when a person sitting in the driver's seat is changed, it is possible to easily detect drunkenness. Thereby, for example, it is possible to prevent the driver from being unnecessarily replaced and avoiding the detection of drunkness after performing drunk detection.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to embodiment mentioned above. In addition, the effects described in the embodiments of the present invention only list the most preferable effects resulting from the present invention, and the effects of the present invention are not limited to those described in the embodiments of the present invention.

  For example, in the present embodiment, the room mirror device 1 has been described as an example of a drunk detection device, but the present invention is not limited to this. The configuration for detecting the alcoholic beverage may have a configuration in which an alcoholic beverage detection module is provided in a portion other than the room mirror in the vehicle (for example, around the handle or the meter). Moreover, the structure which can be directly attached to a drunk detection apparatus, for example on a dashboard, a sun visor, an existing room mirror, A pillar, a windshield, etc. may be sufficient.

  Further, in the present embodiment, the description has been given using the configuration in which the engine of the vehicle is stopped or the engine cannot be started when it is determined that the room mirror device is drunk, but the present invention is not limited thereto. Not. If it is determined that the driver is drunk, any configuration may be used as long as the driver cannot drive the vehicle. For example, the vehicle may be in a braked state or a handle or shift lever locked.

  In the present embodiment, the module main body 21 having the face photographing unit 27 has been described. However, the present invention is not limited to this. The module body 21 may be configured without the face photographing unit 27.

Further, in the present embodiment, the difference between the detected pupil diameter return time T ₂ and the normal pupil diameter return time T ₂ ′, and the detected intermediate mydriatic time T ₃ and the normal intermediate mydriatic time T The difference between ₃ ′ and the alcoholic taste was determined using the difference, but the present invention is not limited to this. For example, the difference between the detected pupil diameter return time T ₂ and the normal pupil diameter return time T ₂ ′ or the detected intermediate mydriatic time T ₃ and the normal intermediate mydriatic time T ₃ It is good also as a structure performed using the difference with '.

Further, in the present embodiment, the difference between the detected pupil diameter return time T ₂ and the normal pupil diameter return time T ₂ ′, and the detected intermediate mydriatic time T ₃ and the normal intermediate mydriatic time T _When the difference from ₃ ′ is 60% or more of the normal time, it is determined that the driver is drunken, but the present invention is not limited to this. For example, when the detected pupil diameter return time T ₂ is longer than the normal pupil diameter return time T ₂ ′ and / or the detected intermediate pupil time T ₃ is longer than the normal intermediate pupil time T ₃ ′. If it is too long, it may be determined to be drunk. Further, the ratio to the normal time (60% in the present embodiment) may be changed as appropriate.

DESCRIPTION OF SYMBOLS 1 Room mirror apparatus 3 Driver's seat 10 Room mirror main body 11 Mirror housing 12 Mirror 20 Alcohol detection module (alcohol detection apparatus)
24 control unit (means to determine alcohol)
25 Eye photographing part (eye photographing means)
25a Near-infrared LED (infrared light source)
25b Near-infrared camera (infrared camera)
26 Flash light source (flash emission means)
27 Face shooting unit (person identification means)
100 eyes 101 pupil

Claims (10)

Eye photographing means for photographing the eyes of a person sitting in the driver's seat;
Flash emission means for emitting a flash toward the eyes of the person sitting in the driver's seat;
A pupil is detected from an image of a person's eye photographed by the eye photographing means, and a person sitting in the driver's seat is intoxicated based on the light reflection time of the pupil emitted by the flash emission means. With a determination of alcohol
A drunk detection device characterized by that. The drunk determination means measures the light reflection time of the pupil when the flash is emitted by the flash emission means from the image of the pupil imaged by the eye photographing means, and the measured light reflection time is calculated in advance. If it is longer than the measured normal reflection time, the person sitting in the driver's seat is determined to be drunk,
The drunkenness detection device according to claim 1. When the difference between the measured light reflection time and the normal light reflection time measured in advance is longer than a predetermined time, the person who is sitting in the driver's seat is drunk. Judge that it is in a state,
The drunk detection device according to claim 2, wherein The eye photographing means has an infrared camera for photographing the eyes of a person sitting in the driver's seat,
The drunk determination means extracts, as a candidate for corneal reflection, an approximate white circle that appears in the eyes of a person sitting in the driver's seat by reflecting infrared rays emitted from the infrared light source. Identify the corneal reflection based on a predetermined condition from the inside, identify a substantially black circle near the identified corneal reflection as the pupil,
The alcoholic beverage detection device according to any one of claims 1 to 3. The eye photographing means has an infrared light source that emits infrared light toward the eyes of a person sitting in the driver's seat,
The infrared light source is disposed so as to surround the infrared camera.
The drunk detection device according to any one of claims 1 to 4, wherein The liquor determination means uses the pupil diameter return time and / or the intermediate mydriatic time of the light reflection time to determine the drunkness of the person sitting in the driver's seat,
The alcoholic beverage detection device according to any one of claims 1 to 5, characterized in that: Comprising a person identifying means capable of identifying a person sitting in the driver seat;
The drunk determination means extracts the normal light reflection time measured in advance of the person specified by the person specifying means, the extracted normal light reflection time, and the measured light reflection time When the difference between is longer than a predetermined time, the person sitting in the driver's seat is determined to be drunk.
The drunk detection device according to any one of claims 1 to 6, wherein The drunkenness determination means extracts the average time of the normal light reflection time when there is no normal light reflection time measured in advance for the specified person, and extracts the extracted normal average light reflection time When the difference between the time and the measured light reflection time is longer than a predetermined time, it is determined that the person sitting in the driver's seat is in a drunk state.
The drunk detection device according to claim 7. The drunk detection device according to any one of claims 1 to 8,
A rearview mirror body that reflects the back of the vehicle,
A room mirror device. The room mirror body has a mirror that reflects the back of the vehicle, and a mirror housing to which the mirror is attached.
The mirror is constituted by a magic mirror, and the drunkenness detection device is disposed on the back side of the mirror;
The room mirror device according to claim 9.

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