JP2009202656A - Drunk driving preventive device and drunk driving preventive method - Google Patents

Drunk driving preventive device and drunk driving preventive method Download PDF

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JP2009202656A
JP2009202656A JP2008044713A JP2008044713A JP2009202656A JP 2009202656 A JP2009202656 A JP 2009202656A JP 2008044713 A JP2008044713 A JP 2008044713A JP 2008044713 A JP2008044713 A JP 2008044713A JP 2009202656 A JP2009202656 A JP 2009202656A
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alcohol
driver
seat
alcohol detection
door
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JP2008044713A
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JP5256777B2 (en
Inventor
Mitsuaki Hagino
Hideaki Inoue
Mitsuhito Ito
Yoshinori Nakano
Katsunori Okada
Akira Onozuka
良宣 中野
秀明 井上
光仁 伊藤
晃 小野塚
勝則 岡田
光明 萩野
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Nissan Motor Co Ltd
日産自動車株式会社
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Abstract

An object of the present invention is to improve the determination accuracy of the presence or absence of drinking by an occupant in a vehicle.
When opening / closing of doors 10 to 13 is detected, the presence or absence of drinking by the occupant is determined by comparing alcohol detection values detected at around the driver's seat 3 in the passenger compartment 2 and at positions other than around the driver's seat 3. To do. At this time, the presence or absence of drunk by the driver is determined in consideration of changes in the air atmosphere in the passenger compartment 2 due to ventilation in the passenger compartment 2 such as opening and closing of the doors 10 to 13.
[Selection] Figure 2

Description

  The present invention relates to a drunk driving determination device and a drunk driving determination method for determining whether or not an occupant drunk in order to prevent drunk driving.

  Accidents caused by drunk driving are likely to be fatal or severe. In many cases, the accident involves not only the person who drinks but also a completely unrelated person. This is because if an automobile is driven with alcohol remaining in the body, attention and judgment are neglected, and accurate operation cannot be performed. For this reason, driving by drinking alcohol is prohibited.

As a conventional technique corresponding to this, there is a technique described in Patent Document 1 or the like.
The technique described in Patent Document 1 is a technique that detects a driver's alcohol and prevents the vehicle from functioning when the alcohol detection value exceeds a predetermined value. Further, in the alcohol detection from the atmosphere in the vehicle compartment, the alcohol concentration that can be acquired changes depending on the wind direction. For this reason, it is disclosed that the alcohol around the driver is detected by comparing the leeward and upwind alcohol around the driver's seat using a wind direction sensor.
JP 2004-249847 A

However, the opening and closing of the door and the occupant's entry ventilate the passenger compartment, causing air flow in the passenger compartment. As a result, it is difficult to accurately acquire the wind direction, and there is a problem that the alcohol concentration and the alcohol generation source may not be accurately measured and determined.
Furthermore, consider the case where there are multiple sources of alcohol. For example, consider a case where a drinker sits in the driver's seat and then another drinker gets in the back seat. In this case, there is a problem that an accurate alcohol concentration of a measurement target may not be measured because drinking sources influence each other.
This invention pays attention to the above points, and makes it a subject to improve the determination precision of the presence or absence of drinking of a passenger | crew.

  In order to solve the above-described problem, the present invention determines whether or not a passenger has drunk by comparing each alcohol detection between the vicinity of the driver's seat in the passenger compartment and a position other than the periphery of the driver's seat. At this time, the presence or absence of drinking by the driver is determined in consideration of a change in the air atmosphere in the passenger compartment due to ventilation of the passenger compartment such as opening and closing of the door.

  According to the present invention, it is easy to discriminate between the drinking state of the driver and the drinking state of passengers in other seats such as the passenger seat by actively utilizing the air flow in the passenger compartment. Thereby, the determination accuracy of the presence or absence of drinking by the occupant is improved.

Next, embodiments of the present invention will be described with reference to the drawings.
(First embodiment)
FIG. 1 is a perspective view of a vehicle 1 equipped with a drunk driving determination device of the present embodiment and a drunk driving prevention device using the drunk driving determination device, as seen from above.
(Constitution)
As shown in FIG. 1, the vehicle 1 according to the present embodiment includes a four-door capacity of five persons having a driver's seat 3, a passenger seat 4 in its lateral position, and three rear seats 5 in a passenger compartment 2. The vehicle 1 is illustrated. Reference numerals 10 to 13 denote doors.

  Then, four alcohol detection sensors 6 to 9 are arranged in the vehicle compartment 2. Each alcohol detection sensor 6-9 is arrange | positioned, for example in headrest vicinity, for example in the backrest upper part of each seat 3,4,5. The rear seat 5 is provided with alcohol detection sensors 8 and 9 only in seats close to the left and right rear doors 12 and 13. Thus, the two alcohol detection sensors 6 and 7 are arranged on the left and right of the front seat, and the remaining two alcohol detection sensors 8 and 9 are arranged on the left and right of the rear seat 5. Each of the two alcohol detection sensors is disposed so as to be in a symmetrical position in the vehicle width direction.

Here, for the determination of the drunk driving of the driver in the present embodiment, at least one of the alcohol detection sensor 6 positioned around the driver's seat 3 and the alcohol detection sensors 7 to 9 disposed at other positions is a total. The determination is possible if there are two alcohol detection sensors.
Here, when the four alcohol detection sensors 6 to 9 are distinguished, the alcohol detection sensor 6 around the driver seat 3 is the first sensor 6, the alcohol detection sensor 7 around the passenger seat 4 is the second sensor 7, and the rear part. The alcohol detection sensors 8 and 9 of the seat 5 are referred to as third and fourth sensors 8 and 9.

  Each of the alcohol detection sensors 6 to 9 detects alcohol vapor. As each alcohol detection sensor 6-9, a semiconductor sensor can be illustrated, for example. In the semiconductor sensor, an oxidation reaction occurs between the reducing gas and the alcohol adsorbed on the surface of the gas-sensitive body of the metal oxide semiconductor. And alcohol is detected using the change of the electrical resistance value formed in the crystal | crystallization surface of a gas sensitive body. In addition to semiconductor sensors, there are alcohol detection sensors such as electrochemical, non-dispersive infrared, and detector tube systems that can measure alcohol in the atmosphere. In this embodiment, the case where a semiconductor sensor is used is illustrated in view of the speed of response, long life, and superiority in price.

Each of the alcohol detection sensors 6 to 9 outputs a detection signal to the drunk driving determination device 30 as detection information. This detection information corresponds to the measured alcohol concentration.
Here, the concentration of alcohol detected by the alcohol detection sensors 6 to 9 is the amount of alcohol detected per unit time.
Moreover, the door opening / closing detection means 15-17 are provided. The door opening / closing detection means 15-17 detect opening / closing of each door 10-13, respectively. The door opening / closing detection means 15-17 outputs a signal corresponding to the opening / closing of the doors 10-13 to the drunk driving determination device 30. Here, the door opening / closing part is usually equipped with an opening / closing sensor. Moreover, the switch of the illumination which illuminates the lower part and room | chamber interior of each door 10-13 is provided, and the switch operates according to opening and closing of the doors 10-13. Therefore, the open / close sensor and the switch part of the illumination may be used as the door open / close detection means 15-17.

A display device 21 and a warning device 22 are arranged in front of the driver's seat 3.
The display device 21 includes a display unit that displays various screen information from the drunk driving determination device 30. The display device 21 uses car navigation, for example, and uses the car navigation screen as a display unit.
The warning device 22 includes a speaker, a lamp, and the like, and emits a warning sound and warning light according to output information from the drunk driving determination device 30.

Moreover, the function suppression means 23 which restrict | limits or cannot operate | move the function of the vehicle 1 is provided. When the inhibition command is input, the function inhibiting unit 23 restricts or disables the function of the vehicle 1. Further, when a release command is input, the function of the vehicle 1 that is restricted or disabled is restored. The operation (lock state) of the function inhibiting means 23 and the release thereof are performed according to a command from the drunk driving determination device 30.
For example, the function inhibiting unit 23 restricts or disables the function of the vehicle 1 by locking the gear of the lever 24 so that the select lever 24 cannot be switched to the forward position. Moreover, the function is revived by releasing the lock. The lock is released at normal times.

In the above description, the case where the function of the select lever 24 is limited or disabled is exemplified as the function inhibiting unit 23. Instead of this, the function inhibiting means 23 may be configured not to start the engine, or to restrict and control the engine and the braking device so that a vehicle speed exceeding a certain level does not occur. In this way, the function inhibiting means 23 that restricts or disables the function of the vehicle 1 may be configured.
In addition, an air conditioner 25 is provided in the front part of the passenger compartment 2. The air conditioner 25 operates based on a command from the air conditioner control device 26.

As shown in FIG. 2, the drunk driving determination device 30 includes first drinking determination means 30 </ b> A and driver drinking determination means 30 </ b> B. In FIG. 2, the second drinking determination unit 30C according to the second embodiment is also shown.
A processing example of the first drinking determination unit 30A will be described with reference to FIG.
When it is detected that any one of the doors 10 to 13 is opened based on the signals from the door open / close detection means 15 to 17 (step S10), the alcohol detection signals from the alcohol detection sensors 6 to 9 are input. Start (step S20).

  Subsequently, when the opened doors 10 to 13 are closed (step S30), whether or not the alcohol detection sensors 6 to 9 closest to the opened and closed doors 10 to 13 detect alcohol of a predetermined value or more. (Step S40), if not detected, it is determined that the occupant who has boarded the doors 10-13 has not drunk (step S80). If it is determined that the person has not drunk, the process ends and returns. Here, the alcohol detection sensors 6-9 closest to the doors 10-13 that have been opened and closed are also referred to as alcohol detection sensors 6-9 near the door.

  On the other hand, when the alcohol detection sensors 6 to 9 near the door detect alcohol of a predetermined value or more, a comparison calculation process is performed (step S50). That is, a comparison calculation is performed between the alcohol detection value of the alcohol detection sensors 6 to 9 in the vicinity of the door and the alcohol detection value of the alcohol detection sensors 6 to 9 in which the closest doors 10 to 13 are not opened. Here, the alcohol detection sensors 6 to 9 in which the nearest doors 10 to 13 are not opened are also referred to as comparative alcohol detection sensors 6 to 9.

In the comparison calculation, in the two alcohol detection sensors 6 to 9, the alcohol detection value is equal to or greater than a predetermined value during the first detection period L1 in which the doors 10 to 13 are in the closed state after being opened. The inclination angle of the time change of the alcohol detection value after becoming is compared. When the alcohol detection value is not equal to or greater than the predetermined value, the inclination angle of the change in alcohol concentration over time is set to zero.
And if the time change of the detection value in the alcohol detection sensors 6-9 close to the door is larger than the time change of the detection value in the comparative alcohol detection sensors 6-9 (if the rise is large), the opening / closing thereof is performed. It is determined that the drunk person got in through the doors 10 to 13 and sat down.

  Here, even when the alcohol detection sensors 6 to 9 in the vicinity of the door do not detect a predetermined amount or more of alcohol, the above comparison calculation may be performed. In this case, when the detection values of the comparative alcohol detection sensors 6 to 9 are not less than a predetermined value and the detection values of the comparative alcohol detection sensors 6 to 9 have a larger inclination, the comparative alcohol detection sensors 6 to 9 are compared. It can be determined that the occupant in the seat corresponding to 9 may be a drinker. In this case, for example, it is possible to use one of the determination methods when detecting drinking after getting into the passenger compartment 2. Further, in this case, the occupants in the seats corresponding to the alcohol detection sensors 6 to 9 near the door do not drink.

The above process is performed for each door 10-13.
If at least the four doors 10 to 13 are not opened and closed at the same time, the above process is effective even when two or more doors 10 to 13 are opened and closed at the same time. That is, the alcohol detection sensors 6 to 9 close to the doors 10 to 13 that have not been opened and closed are used as the comparative alcohol detection sensors 6 to 9, so that whether or not a drunk person gets into and sits on the doors 10 to 13. Can be determined.

  Here, in order to cope with opening and closing of the four doors 10 to 13 at the same time, the following may be performed. That is, a fifth alcohol detection sensor that does not correspond to any seat is arranged in the center of the vehicle compartment 2 in plan view. And when the four doors 10-13 open and close at the same time, the 5th alcohol detection sensor is good also as a comparative alcohol detection sensor. Moreover, when the four doors 10-13 open and close at the same time, you may make it determine only with the absolute value of the detected value of the alcohol detection sensor 6 near a driver | operator.

  If it is determined that the door 10 closest to the driver's seat 3 opens and closes and a drunk person gets in, it is determined that a drunk driving is performed. That is, when the door 10 closest to the driver's seat 3 opens and closes, the alcohol detection value of the alcohol detection sensor 6 near the door is compared with the alcohol detection values of the comparative alcohol detection sensors 7 to 9. And when the alcohol detection value of the alcohol detection sensor 6 in the vicinity of the door has a larger time change, it is determined that the driver is drinking.

If the driver drinking determination unit 30B determines that the driver is drinking based on the determination of the first drinking determination unit 30A, the driver drinking determination unit 30B outputs a suppression command to the function suppression unit 23. If it is determined that the driver is not drinking, a release command is output to the function inhibiting means 23.
Furthermore, if the driver drinking determination unit 30B determines that the driver is drinking, the driver drinking determination unit 30B notifies the driver of a warning through the display device 21 and the warning device 22. For example, the navigation screen is displayed using graphics and characters. In addition, a voice message is issued from the speaker to warn the driver not to drive.
Here, when the door 10 close to the driver's seat 3 opens and closes, the alcohol detection value by the alcohol detection sensor 6 near the door becomes the first alcohol detection value. Moreover, the alcohol detection value by the other alcohol detection sensors 6-9 becomes a 2nd alcohol detection value.

(Function)
In FIG. 4, no one is seated in the passenger seat 4 (equivalent to the state where the passenger in the passenger seat 4 is not drinking), and the driver who is drinking opens and closes the door 10 closest to the driver seat 3. An example of measurement when riding on the board is shown.
As shown in FIG. 4, even when a drunk person sits in the driver's seat 3 due to the flow of air by the opening and closing of the door 10 on the driver's seat 3 side, the alcohol detection sensor 7 installed in the passenger's seat 4 can also provide alcohol. To detect.

  However, paying attention to the first detection period L1 from when the door 10 is in the open state to when it is in the closed state, the inclination of the time change of the detection value of the alcohol detection sensor 6 in the vicinity of the door is the comparative alcohol detection. The rise of the detection amount is larger than the gradient of the change in the detection value with the sensor 7 over time. Here, in FIG. 4, the alcohol detection sensor 6 around the driver's seat 3 corresponds to the alcohol detection sensor in the vicinity of the door. The alcohol detection sensor 7 around the passenger seat 4 corresponds to a comparative alcohol detection sensor.

In this way, by comparing the inclination of the change in the detection value with the alcohol detection sensor 6 in the vicinity of the door with the inclination of the change in the detection value with the comparison alcohol detection sensor 7, the vehicle enters from the opened / closed door 10. It is possible to determine whether the occupant who has been made is a drunk person.
Here, the same applies to the case where a person who has already drunk alcohol is seated on the passenger seat 4. That is, paying attention to the first detection period L1 from when the door 10 of the driver's seat 3 is in the open state to when the door 10 is in the closed state, the inclination of the time change of the detection value in the alcohol detection sensor 6 near the door is The rise is larger than the slope of the time change of the detection value in the comparative alcohol detection sensor 7.

  The reason is as follows. That is, the ventilation by the opening and closing of the door 10 on the driver's seat 3 side is most affected by the air in the vicinity of the opened and closed door 10. Due to such a change in the air atmosphere in the passenger compartment 2, when the occupant who is on the driver's seat 3 side is drinking, the slope of the change in the alcohol detection value over time increases significantly. On the other hand, when the passenger in the passenger seat 4 is drinking, the influence of ventilation due to the opening and closing of the door 10 on the driver's seat 3 side is smaller than that on the driver's seat 3 side, so the inclination of the change over time of the detected value Is small (rise is small). When the passenger in the passenger seat 4 is drinking, the absolute value of the alcohol detection value in the alcohol detection sensor 7 may be large.

Here, in the process of the above embodiment, if a drinker gets into the passenger seat 4 before the driver, it can be detected in advance that the drinker is seated in the passenger seat 4.
Further, from the viewpoint of preventing drunk driving, it is important whether or not the driver seated in the driver's seat 3 is drinking, and it is not always necessary whether the passenger in the passenger seat 4 or the rear seat 5 is drinking. . But it is good to detect whether the passenger | crew of the passenger seat 4 or the backseat 5 is drinking as mentioned above. It is possible to correct the determination as to whether or not the driver is drinking depending on the alcohol distribution or the like by an alcohol source other than the driver's seat 3.
Here, when an occupant who has entered the passenger compartment 2 is drinking, the alcohol continues for a predetermined period of time due to a metabolic phenomenon in which undegraded alcohol evaporates from the sweat or exhalation from the occupant. Is released inside.

(Effect of this embodiment)
(1) The detection value of the alcohol detection sensors 6 to 9 near the door close to the position where the influence of the ventilation is large and the detection of the comparative alcohol detection sensors 6 to 9 with the change in the air atmosphere accompanying the ventilation in the passenger compartment 2 Compare with the value. Thereby, it can be determined whether or not an occupant who has been placed through the opened and closed doors 10 to 13 is drinking.
(2) At this time, it is possible to determine whether or not the occupant who has been placed from the opened and closed doors 10 to 13 is drinking by using the slope of the change in alcohol concentration over time due to the change in the air atmosphere due to ventilation. I can do it.
(3) By determining in the 1st detection period L1, it becomes possible to determine the presence or absence of drinking immediately after a passenger's boarding.

(4) If the opened and closed doors 10 to 13 are doors 10 near the driver's seat 3, it can be determined whether or not the driver is drinking.
(5) By applying the opening and closing of the doors 10 to 13 as ventilation means, it is possible to determine when an occupant who makes a drinking decision gets into the vehicle 1.
And from the alcohol detection status of the alcohol detection sensors 6 to 9, it is possible to determine when the drinking occupant has boarded.
Furthermore, since the user sits in the vicinity of the opened and closed doors 10 to 13, it can be determined where the occupant is seated on the seat.

(Modification)
(1) In the above embodiment, the actual opening / closing of the doors 10 to 13 is detected. Instead, as shown in FIG. 5, each seat may be provided with a seating sensor 40 that detects whether a passenger is seated, and the seating sensor 40 may estimate the opening and closing of the doors 10 to 13.
As the seating sensor 40, for example, a pressure sensor is disposed below the seat seating surface, and the pressure sensor is used as the seating sensor 40. Further, it may be determined whether the passenger is seated by the in-vehicle camera 41.
The seating sensor 40 and the in-vehicle camera 41 constitute seating detection means.
Here, before the seating sensor 40 detects the seating of an occupant, the doors 10 to 13 near the occupant are normally opened and closed. Therefore, the above-described determination process may be performed by regarding the period from when the seating sensor 40 detects the seating of an occupant to the detection of seating for a predetermined time as the first detection period L1.

(2) In addition to detecting the actual opening and closing of the doors 10 to 13, a seating sensor 40 may be provided. In this case, the estimation accuracy of where the occupant who got on the doors 10 to 13 is seated is improved.
(3) Moreover, in the said embodiment, the inclination of the temporal change of the alcohol detection value in the 1st detection period L1 is compared, and it is determined whether the passenger | crew who got in is a drunk person. Instead of this, the fluctuation range of the alcohol detection value may be compared to determine whether or not the person is a drinker.
As shown in FIG. 4, in the first detection period L <b> 1 from the door 10 opened state to the door 10 closed state, the air flow due to the opening and closing of the door 10 and the air flow due to the occupant getting in are large in the vicinity of the door 10. . Based on this, the concentration detected by the alcohol detection sensor 6 in the vicinity of the door fluctuates greatly compared to the detection value of the comparative alcohol detection sensor 7. That is, the vicinity of the alcohol detection sensor 6 in the vicinity of the door is in an atmosphere state in which the fluctuation range of fluctuation is relatively large.

Accordingly, when it is determined that the detection value of the alcohol detection sensors 6 to 9 near the door has a larger concentration fluctuation width in the time change of the detection values by the two alcohol detection sensors 6 to 9, the detection value is opened and closed. A passenger from doors 10 to 13 can be determined as a drinker.
Here, when the detection values of the comparative alcohol detection sensors 6 to 9 are not less than a predetermined value and the detection value of the comparative alcohol detection sensors 6 to 9 has a larger fluctuation width of the concentration, the comparative alcohol detection sensors 6 to 6 are compared. The passenger in the seat corresponding to 9 can be determined to be a drinker.

(4) Moreover, in the said embodiment, the inclination of the temporal change of the alcohol detection value in the 1st detection period L1 is compared, and it is determined whether the passenger | crew who got in is a drinker. Instead, the absolute value of the alcohol detection value may be compared to determine whether or not the person is a drinker.
That is, as shown in FIG. 4, if the absolute value of the detection value of the alcohol detection sensor 6 near the door is larger than the absolute value of the comparative alcohol detection sensor 7, an occupant close to the alcohol detection sensor 6 near the door. Can be determined as a drinker. As the absolute value of the detection value, for example, a peak value in the first detection period L1 may be used.

In addition, before the door 10 of the driver's seat 3 is opened and closed, if a drinker is in the passenger seat 4 or the rear seat 5, it is first determined whether or not the passenger is a drinker. . Therefore, it is preferable that the alcohol detection sensors 6 to 9 around the seat where no drinker is seated are the comparative detection sensors 6 to 9.
Moreover, when judging by an absolute value, since the air atmosphere of the seat near the opened and closed doors 10 to 13 is ventilated by opening and closing the doors 10 to 13, the detection values alone of the alcohol detection sensors 6 to 9 near the door Thus, if the peak value of the detected value is greater than or equal to a predetermined value, it may be determined unconditionally as a drinker.

(Second Embodiment)
Next, a second embodiment will be described with reference to the drawings. In addition, about the apparatus similar to the above-mentioned embodiment, the same code | symbol is attached | subjected and demonstrated.
The basic configuration of the apparatus of the present embodiment is the same as that of the first embodiment.
The comparison calculation method by the drinking determination means is different.
In the first embodiment, the first drinking determination unit 30A determines drinking based on the alcohol detection value in the first detection period L1 from when the doors 10 to 13 are opened to closing.
In the second embodiment, the second drinking determination means 30C indicated by a one-dot chain line in FIG. 2 indicates that the drinking is based on the alcohol detection value in the second detection period L2 from when the opened doors 10 to 13 are closed until a predetermined time has elapsed. Determine presence or absence.

Here, the drinking determination in the first detection period L1 and the drinking determination in the second detection period L2 are drinking determinations in different scenes. Therefore, in addition to the drinking determination described in the first embodiment, the drinking determination of the second embodiment may be performed.
Further, when the door 10 is in a closed state, the interior of the passenger compartment 2 becomes a closed space. For this reason, as shown in FIG. 4, the alcohol emitted from the drinker is gradually dispersed with time, so that the indoor air atmosphere changes in a direction in which the alcohol concentration in the passenger compartment 2 becomes uniform. And when predetermined time passes since the door 10 closed, the alcohol concentration in the compartment 2 will be in the state close | similar to equalization. A state in which the alcohol concentration in the passenger compartment 2 is close to uniform or a state in which the alcohol concentration is uniform is referred to as an alcohol concentration uniform state.

The time during which the alcohol concentration is uniform is obtained in advance from experiments. Then, the predetermined time may be set to the time or a time that is small by a margin.
In the second drinking determination unit 30C of the present embodiment, when the doors 10 to 13 are detected to be opened or changed from open to closed, alcohol detection by the alcohol detection sensors 6 to 9 is started. Alcohol detection may be performed continuously from a long time ago.

A processing example of the second drinking determination unit 30C will be described with reference to FIG.
It is determined whether or not any of the doors 10 to 13 is opened, and when it is determined that any of the doors 10 to 13 is opened (step S110), alcohol detection is started (step S120).
Further, when the opened doors 10 to 13 are closed (step S130), it is determined whether or not alcohol of a predetermined value or more is detected by the alcohol detection sensors 6 to 9 in the vicinity of the door (step S140). In step S190, it is determined that there is no occupant of the drinking car at the doors 10-13.

On the other hand, when the alcohol detection sensors 6 to 9 near the door detect alcohol of a predetermined value or more, it is determined whether or not a predetermined time has passed (step S150). Since the detection period L2 has elapsed, the process ends.
On the other hand, when it is determined that the predetermined time has not elapsed, the alcohol detection values of the alcohol detection sensors 6 to 9 near the door are compared with the comparative alcohol detection sensors 6 to 9 (step S160).

In the comparison calculation, in the two alcohol detection sensors 6 to 9, the change in time of alcohol detection is detected during the first detection period L1 from when the doors 10 to 13 change to the closed state until the predetermined period elapses. Compare tilt angles.
And if the time change of the detection value in the alcohol detection sensors 6-9 near the door is smaller than the time change of the detection value in the comparative alcohol detection sensors 6-9, from the opened and closed doors 10-13. It is determined that the drunk person gets in and sits down (step S180).
The driver drinking determination unit 30B performs the same process as in the first embodiment based on the determination of the second drinking determination unit 30C.

(Function)
As shown in FIG. 4, alcohol is also detected by the alcohol detection sensor 6 installed in the passenger seat 4 even when a drinker sits in the driver seat 3 due to the flow of air accompanying the opening and closing of the door 10. However, there is a difference in alcohol concentration between the driver's seat 3 and the passenger seat 4 immediately after the door 10 is closed. From this state, since the interior of the passenger compartment 2 is a closed space, it is affected by the alcohol of the drinker seated in the driver's seat 3 over time. Therefore, in the air atmosphere in the passenger compartment 2, the alcohol is dispersed so that the alcohol concentration becomes uniform.

At this time, immediately after the door 10 is closed as described above, there is a difference in alcohol concentration between the driver's seat 3 and the passenger seat 4. That is, the alcohol concentration is higher in the driver position where the driver is drinking as the initial value of the second detection period L2. As a result, the slope of the temporal change in alcohol detection is relatively lower around the driver.
Accordingly, it is possible to determine that the alcohol is being drunk if the inclination of the time change of the alcohol detection sensors 6 to 9 near the door is relatively small.

(Effect of this embodiment)
(1) The detection value of the alcohol detection sensors 6 to 9 near the door close to the position where the influence of the ventilation is large and the detection of the comparative alcohol detection sensors 6 to 9 with the change in the air atmosphere accompanying the ventilation in the passenger compartment 2 The value is compared and calculated in the second detection period L2. Thereby, it can be determined whether or not an occupant who has been placed through the opened and closed doors 10 to 13 is drinking.
(2) Other effects are the same as those of the first embodiment.

(Third embodiment)
Next, a third embodiment will be described with reference to the drawings. In addition, about the apparatus similar to the above-mentioned embodiment, the same code | symbol is attached | subjected and demonstrated.
The third embodiment is a case where the determination methods of the first embodiment and the second embodiment described above are used in combination.
That is, in the first detection period L1, the drinking comparison comparison method described in the first embodiment is used. Subsequently, in the second detection period L2, the comparison determination method described in the second embodiment is used.
Here, as a comparison determination method, it is assumed that the determination is made by comparing the slopes of changes in alcohol detection over time.
In this case, as described above, the relative inclination comparison determination is reversed between the first detection period L1 and the second detection period L2. Therefore, the comparison calculation method is changed between the first detection period L1 and the second detection period L2. That is, the comparison condition is changed between the first detection period L1 and the second detection period L2.

(effect)
(1) The comparison calculation method is changed between the first detection period L1 and the second detection period L2. Thereby, it is possible to appropriately detect the presence or absence of occupant's drinking over both detection periods of the first detection period L1 and the second detection period L2.
(Modification)
(1) A case where a comparison operation is performed based on the fluctuation width of density will be described.
In the case of comparison determination based on the fluctuation width, it is determined that the possibility of drinking is high when the fluctuation width is large in both the first detection period L1 and the second detection period L2.
However, the relative magnitude of the fluctuation width is larger in the first detection period L1 than in the second detection period L2. In view of this, the comparison calculation method may be changed such that the first detection period L1 performs the comparison calculation with the magnitude of the fluctuation width, and the second detection period L2 performs the comparison calculation based on the density.
Thereby, the presence or absence of drinking can be determined appropriately according to the detection period.

(2) Here, the contents of the comparison calculation in the second detection period L2 may be corrected according to the determination contents by the comparison calculation in the first detection period L1.
That is, the alcohol detection values by the alcohol detection sensors 6 to 9 in the second detection period L2 may be corrected according to the concentration state detected in the first detection period L1.
For example, even if there is no drinker in the passenger seat 4, alcohol is also detected around the passenger seat 4 over time as shown in FIG. 4. By subtracting the degree of influence of this temporal concentration, the alcohol detection sensor 7 around the passenger seat 4 is corrected to a small value so that alcohol from an occupant seated on the passenger seat 4 side is not detected. Similarly, the accuracy of the comparison calculation of the alcohol concentration of each seat can be improved by subtracting the influence corresponding to the time for the back seat.

  Here, as shown in FIG. 7 (a), when a drinker gets in (a) seat, (i) seat (neighboring seat), (c) seat (rear seat), (d) seat (oblique seat), As shown in FIG. 7B, the amount of alcohol was influenced by the amount of a light bar graph. Alcohol was detected even though no drinker was actually seated in the (i), (c), and (d) seats. Next, when a drinker gets on the slanted seat, the alcohol amount corresponding to the dark bar graph is added. In this way, it was possible to estimate the amount of alcohol affected by each sensor position.

  FIG. 8 shows the relationship between the alcohol detection sensor attached to each seat and the amount of alcohol in the drinker seat. The slanted seat of (d) has less influence than the seat (a) seated by the drinker, and the relative value is the largest compared to other seats. By comparing the alcohol detection sensor of the seat with the largest relative value, it was possible to determine that it was the position where the drinker was seated on the seat where the alcohol detection sensor with the largest amount of alcohol was placed.

(3) When the second detection period L2 has elapsed, the third detection period L3 is reached. In the third detection period L3, the alcohol concentration is almost uniform as shown in FIG. In this case, even if the alcohol detection sensors 6 to 9 in the vicinity of the driver's seat 3 simply detect more than a predetermined amount of alcohol, the driver may not be drinking.
In this case, the air conditioner (air conditioner 25) in front of the driver's seat 3 is driven to periodically perform forced indoor ventilation. Thereby, the presence or absence of drinking can be detected by the concentration difference of alcohol detection as described above. It is also possible to activate the air conditioner, apply air from the outside to the driver, measure the alcohol concentration by the sensor on the leeward side, and determine whether the driver is drinking.

If the vehicle is running, it may be controlled to open the window and take in outside air once before starting measurement.
In this case, the closer to the part that is ventilating, the greater the change in the air atmosphere.
Here, the air conditioner 25 in the present embodiment refers to a device that controls the replacement of air with outside air and the flow of air in the vehicle 1. And the air-conditioning control apparatus 26 controlled the air conditioner, and controlled the air volume, the wind direction, the outside air introduction, and the inside air circulation. In addition, the air purifier equipped with the vehicle 1 and the opening and closing of the window glass can be controlled. The air conditioner 25 in the present invention refers to a device that controls the replacement of air with outside air and the flow of air in the vehicle 1.

1 is a top view of a vehicle 1 illustrated in a perspective view showing an arrangement example of devices according to an embodiment of the present invention. It is a figure explaining the structure of the drunk driving determination apparatus which concerns on 1st Embodiment based on this invention. It is a figure explaining the process example of a 1st drinking determination means. It is a figure which illustrates the time change of the alcohol concentration in a driver's seat and a passenger seat. It is a side view which shows the example of arrangement | positioning of a seating sensor. It is a figure explaining the process example of a 2nd drinking determination means. It is a figure which shows the example of the alcohol detection amount in each seat. It is a figure which shows the example of the alcohol detection amount in each seat.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Cabin 3 Driver's seat 4 Passenger seat 5 Rear seats 6-9 Alcohol detection sensor 10-13 Door 15-17 Door opening / closing detection means 21 Display device 22 Warning device 23 Function suppression means 24 Select lever 25 Air conditioning device 26 Air conditioning control Device 20 Drunk Driving Determination Device 30A First Drinking Determination Unit 30B Driver Drinking Determination Unit 30C Second Drinking Determination Unit 32 Driver's Seat 40 Seating Sensor 41 In-Vehicle Camera L1 Detection Period L2 Detection Period

Claims (15)

  1. A plurality of alcohol detection sensors for detecting each alcohol at a position around the driver's seat and outside the driver's seat in the passenger compartment;
    Alcohol determination means for determining the presence or absence of occupant drinking based on alcohol detection of the plurality of alcohol detection sensors,
    A ventilation means for ventilating the passenger compartment,
    The drunk determination means, when detecting the ventilation in the passenger compartment, determines whether or not the occupant is drinking based on the change in the air atmosphere in the passenger compartment due to the ventilation and the alcohol detection value of the alcohol detection sensor. apparatus.
  2. The ventilation means is a door that ventilates the vehicle interior by opening and closing,
    2. The drunk driving determination apparatus according to claim 1, wherein the drunk determination unit detects ventilation in the passenger compartment by estimating or detecting opening and closing of the door.
  3.   The drinking determination unit compares the first alcohol detection value by the alcohol detection sensor around the driver's seat with the second alcohol detection value by the alcohol detection sensor at a position other than around the driver's seat, thereby determining whether the driver has drunk. The drunk driving determination apparatus according to claim 2, wherein:
  4.   The drinking determination means includes the first alcohol detection value by the alcohol detection sensor around the driver seat and the alcohol at a position other than around the driver seat until the door closest to the driver changes from the open state to the closed state. The drunk driving determination device according to claim 3, wherein the driver determines whether the driver has drunk or not by comparing the second alcohol detection value by the detection sensor.
  5.   When the alcohol determination unit detects that the door closest to the driver has changed from the open state to the closed state, the first alcohol detection sensor around the driver seat until the predetermined time elapses after the door is closed. 5. The presence or absence of drinking by the driver is determined by comparing the alcohol detection value with a second alcohol detection value obtained by an alcohol detection sensor at a position other than around the driver's seat. The drunk driving determination device described.
  6.   The drinking determination means includes a first detection period until the door closest to the driver changes from an open state to a closed state, and a second detection period until the predetermined time elapses after the door is closed. 4. The drunk driving determination device according to claim 3, wherein a comparison condition between the first alcohol detection value and the second alcohol detection value for the presence / absence determination is changed.
  7.   The drunk driving determination device according to any one of claims 3 to 6, wherein the drinking determination unit compares a change in concentration of the alcohol detection value over time.
  8.   The drunk driving determination apparatus according to any one of claims 3 to 7, wherein the drinking determination unit compares absolute values of alcohol detection values.
  9. Equipped with seating detection means for detecting that an occupant is seated in the seat;
    The drunk driving determination device according to any one of claims 2 to 8, wherein the drinking determination unit estimates opening / closing of a door based on a signal from a seating detection unit.
  10.   The seating detection means for detecting that a passenger is seated on the seat is provided, and the seating position of the passenger who has entered from the opened / closed door is determined by detection of the seating detection means. The drunk driving determination apparatus described in item 1.
  11.   The drunk driving determination apparatus according to any one of claims 1 to 10, wherein the ventilation means includes an air conditioner.
  12.   The said drinking determination means operates the said air conditioner and ventilates the vehicle interior when the air atmosphere state in the vehicle interior determines that the alcohol concentration is in a uniform state or a state in which the alcohol concentration is nearly uniform. The drunk driving determination device described.
  13.   When the opening / closing of a vehicle door is detected, alcohol detection detected around the seat near the door in the vehicle interior in consideration of the change in the air atmosphere in the vehicle interior due to the opening / closing of the door, and around the seat near the door Is a drunk driving determination method for determining whether or not an occupant has drunk by comparing with alcohol detection detected at different vehicle interior positions.
  14.   The drunk driving determination method according to claim 13, wherein the seat close to the door is a driver's seat.
  15.   The drunk driving determination method according to claim 13 or 14, wherein the comparison is performed by comparing changes in concentration over time.
JP2008044713A 2008-02-26 2008-02-26 Drunk driving judgment device Active JP5256777B2 (en)

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JP2016154759A (en) * 2015-02-25 2016-09-01 野崎 淳夫 Biological information collection chair, and vehicle and biological information diagnostic system using the same

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JP2004249847A (en) * 2003-02-20 2004-09-09 Micron Seimitsu Kk Method and device for preventing risk in operating control
JP2009061248A (en) * 2007-08-09 2009-03-26 Toyota Motor Corp Drunken condition judging device and drunken driving preventing device
JP2009078630A (en) * 2007-09-25 2009-04-16 Denso Corp Drunken driving prevention system

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JPH0650918A (en) * 1992-07-31 1994-02-25 Toyota Motor Corp Apparatus for detecting drunk state
JPH06197897A (en) * 1992-12-28 1994-07-19 Toyota Central Res & Dev Lab Inc Alcohol detecting device
JP2004249847A (en) * 2003-02-20 2004-09-09 Micron Seimitsu Kk Method and device for preventing risk in operating control
JP2009061248A (en) * 2007-08-09 2009-03-26 Toyota Motor Corp Drunken condition judging device and drunken driving preventing device
JP2009078630A (en) * 2007-09-25 2009-04-16 Denso Corp Drunken driving prevention system

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Publication number Priority date Publication date Assignee Title
JP2016154759A (en) * 2015-02-25 2016-09-01 野崎 淳夫 Biological information collection chair, and vehicle and biological information diagnostic system using the same

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