JP2008310496A - Drunken driving prevention system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drunken driving prevention system for preventing any person other than a person who is scheduled to drive from performing alcohol detection instead. <P>SOLUTION: Seating sensors 6A(6B, 6C, 6D) are prepared to detect whether or not there exists a person who has taken a driver's seat (passenger seat, rear right side seat, rear left side seat). Buckle switches 7A(7B, 7C or the like) are prepared to turn on when the seat belt of the driver's seat (passenger seat, rear right side seat, rear left side seat) is fastened. An alcohol detector 4 is installed in a place where it is possible only for a person who has taken the driver's seat (the person scheduled to drive) to perform alcohol detection. A drunken driving prevention control device is prepared to treat an alcohol detection result acquired by alcohol detection by the alcohol detector 4 as that of the person who is scheduled to drive when it is grasped that the persons who have taken all the seats whose seating states are detected are constrained by the seat belts. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a system for preventing drunk driving.

Patent Document 1 discloses a system of this type in which an alcohol detector is installed in a vehicle, and when alcohol exceeding a reference value is detected by the alcohol detector, engine start is prohibited. .
JP 63-53120 A

  However, in the system disclosed in Patent Document 1, an alcohol subject is not specified as a driving candidate, and it is also possible that a person other than the driving person is an alcohol subject. For example, when a person who is scheduled to drive is in a drunk state and a passenger who is not in a drinking state is present there, if the passenger detects the alcohol on behalf of the person who is driving, the engine will start. Will be allowed. And if this driving person actually drives in a drunk state, the original purpose of preventing drunk driving is lost.

  The present invention has been made paying attention to such problems, and an object of the present invention is to provide a drunk driving prevention system capable of preventing impersonation of alcohol detection by a person other than the planned driver. It is in.

  In order to achieve the above object, the invention according to claim 1 is directed to a drunk driving prevention system that prohibits driving of a vehicle when alcohol exceeding a reference value is detected by an alcohol detector. A seating sensor that detects whether or not the driver is seated is installed in all seats including the driver's seat, so that the person seated in the driver's seat can detect alcohol and seat in a seat other than the driver's seat. The driver's alcohol detector is installed on the assumption that all the passengers are seated in any of the seats, and the driver's seat alcohol detector is installed in a place where the passenger cannot detect alcohol. The gist is that it has alcohol subject identification means that treats the alcohol detection result obtained as a result of the scheduled driving when the detection is performed. There.

  According to this configuration, assuming that all the passengers are seated in one of the seats, when alcohol detection is performed by the driver's alcohol detector, those who can do so are seated in the driver's seat. In this case, the alcohol detection result obtained thereby is treated as that of the driving person. In other words, if this alcohol detection result indicates a drunk state, it means that the person who is planning to drive is in a drunk state. In this case, driving of the vehicle is prohibited, otherwise driving of the vehicle is prohibited. Is acceptable. Therefore, impersonation of alcohol detection by a person other than the driving person can be prevented.

  According to a second aspect of the present invention, in the drunk driving prevention system according to the first aspect, all the seats are provided with buckle switches that are turned on when the seat belts of the seats are tightened, and the seating sensor is in the seating state. When the buckle switch provided on the seat detecting the ON is ON, it is grasped that the person sitting on the seat is restrained by the seat belt, and the seating sensor detects the seating state. When all of the seats are known, the restraint state determination means for determining that all the passengers are restrained in the seated state in any seat, the alcohol subject identification means, The driver's seat alcohol is provided on the condition that all the passengers are restrained in a seated state in any seat by the restraint state judging means. When alcohol detection by known devices has been performed, and its gist that deals with alcohol detection result obtained thereby as the driver prospective.

  According to this configuration, in the state where all the passengers are restrained by the seat belts in their seats, no one other than the planned driver can perform alcohol detection by the driver seat alcohol detector. Therefore, by specifying such a state, it is possible to reliably prevent impersonation of alcohol detection by a person other than the scheduled driver.

  The invention according to claim 3 is the drunk driving prevention system according to claim 1, in which all persons including the driver's seat can detect alcohol by the person sitting there, and there Alcohol detection for passengers installed in seats where seating sensors detect seating status by installing a passenger alcohol detector in a place where a person sitting in a seat other than the seat cannot detect alcohol When the alcohol is detected by the vessel, it is understood that the person sitting in the seat is detecting alcohol, and that is detected in all the seats where the seating sensor detects the seating state. The alcohol detection state determination means for determining that all the passengers are detecting alcohol in the seated state in any of the seats. The test subject specifying means is provided that the alcohol detection state determination means determines that all of the passengers are detecting alcohol in a seated state in any seat, on the condition that the driver seat alcohol The gist is to treat the alcohol detection result obtained by the alcohol detection by the detector as that of the intended driver.

  According to this configuration, in the state where all the passengers are detecting alcohol in their seats, persons other than those who are scheduled to drive cannot perform alcohol detection by the driver seat alcohol detector. Therefore, by specifying such a state, it is possible to reliably prevent impersonation of alcohol detection by a person other than the scheduled driver.

Since this invention is comprised as mentioned above, there exist the following effects.
According to the present invention, it is possible to prevent impersonation of alcohol detection by a person other than the scheduled driver.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described.
As shown in FIG. 1, an electronic key system 1 is applied to the automobile of this embodiment. The electronic key system 1 includes an electronic key 2 possessed by a vehicle user and a security device 3 provided on the vehicle side, and bidirectional communication is possible between them. The electronic key 2 is called a portable device because of its possession.

  The electronic key 2 has a reception function by wireless communication and a transmission function by wireless communication, and includes a reception antenna 21, a reception circuit 22, a microcomputer 23, a transmission circuit 24, and a transmission antenna 25.

  The receiving antenna 21 is a medium for receiving a request signal transmitted from the security device 3. The reception circuit 22 demodulates the request signal received by the reception antenna 21 to generate a reception signal, and outputs the reception signal to the microcomputer 23.

  The microcomputer 23 includes a non-volatile memory 23a, and an ID code (ID code of the electronic key 2) individually set for the electronic key 2 is stored in the memory 23a. When the reception signal related to the request signal is input from the reception circuit 22, the microcomputer 23 generates a signal (ID code signal) including the ID code of the electronic key 2 in order to respond to the request signal. The code signal is output to the transmission circuit 24.

  The transmission circuit 24 modulates the ID code signal input from the microcomputer 23 into a radio wave having a predetermined frequency (300 MHz in this embodiment). The transmission antenna 25 is a medium for transmitting the ID code signal modulated by the transmission circuit 24.

  The security device 3 has a transmission function by wireless communication and a reception function by wireless communication, and includes a transmission circuit 31, a transmission antenna 32, a reception antenna 33, a reception circuit 34, and a verification device 35.

  The transmission circuit 31 modulates the request signal input from the collation device 35 into a radio wave having a predetermined frequency (134 KHz in this embodiment). The transmission antenna 32 is a medium for transmitting the request signal modulated by the transmission circuit 31.

  Here, the request signal transmitted from the transmission antenna 32 extends over substantially the entire area inside the vehicle and hardly reaches outside the vehicle. In FIG. 2, the region is indicated by a two-dot chain line as a predetermined region A32 in the vehicle. In the predetermined area A32 in the vehicle, bidirectional communication between the electronic key 2 and the security device 3 is possible. That is, when the electronic key 2 is brought into the predetermined area A32 in the vehicle while the request signal is transmitted in the predetermined area A32 in the vehicle, the request signal is received by the electronic key 2 and the electronic key 2 2 transmits an ID code signal.

  Returning to FIG. 1, the receiving antenna 33 is a medium for receiving an ID code signal transmitted from the electronic key 2 as a response signal to the request signal. The receiving circuit 34 demodulates the ID code signal received by the receiving antenna 33 to generate a received signal, and outputs the received signal to the verification device 35.

  The verification device 35 includes a non-volatile memory 35a, and the memory 35a has the same ID code as the ID code of the electronic key 2 (= the regular electronic key 2) that is suitable for the vehicle on which the security device 3 is mounted. A code (reference ID code) is stored.

  When the door is opened, the collating device 35 outputs a request signal to the transmission circuit 31 in order to monitor boarding (entry into the predetermined area A32 in the vehicle) by the owner of the proper electronic key 2. That is, in this case, the collation device 35 performs in-vehicle communication control. As a result, a request signal is transmitted from the transmission antenna 32 into the predetermined area A32 in the vehicle.

  When the reception signal related to the ID code signal is input from the reception circuit 34 due to the execution of the in-vehicle communication control, the verification device 35 matches the ID code included in the reception signal with the reference ID code. Judge whether or not. That is, in this case, the collation device 35 performs ID code collation. And the collation apparatus 35 recognizes that the regular electronic key 2 was used when both ID codes correspond by this ID code collation. And the collation apparatus 35 will output the signal (ID code coincidence signal) which suggests that the regular electronic key 2 was utilized to the drunk driving prevention control apparatus 5, when it recognizes in this way. As a result, when the regular electronic key 2 is used, one of the conditions required for starting the engine is satisfied.

Next, feature points in the automobile of this embodiment will be described.
In the automobile of the present embodiment, in addition to the use of the regular electronic key 2 as a condition for permitting the start of the engine, alcohol detection is appropriately performed with the intended driver as an alcohol subject, As a result, it is necessary to detect alcohol below the reference value.

  In the present embodiment, only one alcohol detector 4 provided for alcohol detection is provided in the vehicle, and a person sitting in the driver's seat (planned driver) can detect alcohol by that, and other than the driver's seat. It is installed in a place where the person sitting on the seat (passenger) cannot detect alcohol. That is, only a person (scheduled driver) sitting in the driver's seat can detect alcohol by the alcohol detector 4. In the present embodiment, the alcohol detector 4 corresponds to a driver seat alcohol detector.

The alcohol detector 4 includes an exhalation air inlet 41, a microcomputer 42, an alcohol detection switch 43, and an alcohol sensor 44.
The exhalation-breathing port 41 is for an alcohol subject to breathe in. Then, when the air volume of the exhaled air blown from the exhalation air inlet 41 is detected by an air volume sensor (not shown) and reaches the reference air volume, the microcomputer 42 properly detects alcohol by the alcohol subject. It is to be treated as a thing.

  The alcohol detection switch 43 is operated to start alcohol detection by the alcohol detector 4. Then, the microcomputer 42 starts preparations necessary for alcohol detection by the alcohol detector 4 with the operation of the alcohol detection switch 43 as a trigger.

  The alcohol sensor 44 can detect the amount of alcohol in the expired gas when the sensor element is heated and reaches a predetermined temperature, that is, when the heating is completed, and also according to the amount of alcohol. A detection signal is output to the microcomputer 42. The microcomputer 42 starts heating the alcohol sensor 44 as a preparation necessary for alcohol detection by the alcohol detector 4 with the operation of the alcohol detection switch 43 as a trigger. Then, when the heating of the alcohol sensor 44 is completed, the microcomputer 42 validates the detection signal input from the alcohol sensor 44 while monitoring the volume of exhaled air.

  When the detection signal from the alcohol sensor 44 is validated, the microcomputer 42 analyzes the detection signal, thereby recognizing the amount of alcohol in the breath that has been blown from the breath blowing port 41. Then, the microcomputer 42 generates a signal (alcohol detection result signal) including information on the amount of alcohol in the expired air, and outputs it to the drunk driving prevention control device 5.

  The drunk driving prevention control device 5 determines whether or not the alcohol amount in the expiration is less than the reference alcohol amount by analyzing the information regarding the alcohol amount in the expiration included in the alcohol detection result signal. Note that data relating to the reference alcohol amount is stored in a non-volatile memory (not shown), and for example, the alcohol amount per liter of breath is set to 0.15 milligram (= 0.15 mg / L). As a result, when the amount of alcohol in the exhalation is less than the reference amount of alcohol, one of the conditions necessary for starting the engine is satisfied.

As shown in FIG. 3, seating sensors 6 </ b> A to 6 </ b> D and buckle switches 7 </ b> A to 7 </ b> D are electrically connected to the drunk driving prevention control device 5.
The seating sensor 6A is for detecting whether there is a person seated in the driver's seat, and the seating sensor 6B is used to check whether there is a person seated in the passenger seat. It is for detection. The seating sensor 6C is for detecting whether or not there is a person seated in the rear right seat, and the seating sensor 6D is for the person seated in the rear left seat. It is for detecting whether or not. The seating sensors 6A to 6D have the same configuration. When the passenger is seated on the seat and a load is applied to the seat, the electrodes provided in the lower portion of the seat come into contact with each other. A detection signal indicating the state is output to the drunk driving prevention control device 5.

  The buckle switch 7A is turned on when the driver's seat belt is fastened, and the buckle switch 7B is turned on when the passenger's seat belt is fastened. The buckle switch 7C is turned on when the seat belt of the rear right seat is fastened, and the buckle switch 7D is turned on when the seat belt of the rear left seat is fastened. The buckle switches 7A to 7D have the same configuration, and when the seat belt of the seat there is fastened and turned ON, a detection signal indicating that the passenger is restrained by the seat belt is sent to the drunk driving prevention control device 5 Output to.

  By the way, as described above, the alcohol detector 4 is designed so that only the person sitting in the driver's seat (the person who is scheduled to drive) can detect the alcohol, but the person who does it (alcohol) Subject) is not necessarily a driving person. For example, a driving person who is in a drunk state does not become an alcohol subject but simply sits in the driver's seat, and a passenger who is not in the drinking state becomes an alcohol subject and detects alcohol by the alcohol detector 4 from the vicinity of the driver's seat. The case of doing is considered. In other words, a case where an impersonation of alcohol detection by a passenger is performed can be considered.

Therefore, in the present embodiment, a device for preventing such impersonation is elaborated. This will be described below.
Here, as shown in FIG. 4, there are persons seated in the driver's seat, the passenger seat, and the rear right seat, and they are in a state where the seat belt of the seat is fastened, and the rear left seat Assume that is empty.

  In this case, the drunk driving prevention control device 5 grasps that there is a person seated in the driver's seat (planned driver) based on the detection signal from the seating sensor 6A, and the seating sensor 6B ( Based on the detection signal from 6C), it is understood that there is a person sitting in the passenger seat (the rear right seat).

  Further, the drunk driving prevention control device 5 grasps that the seat belt of the driver's seat is fastened based on the detection signal from the buckle switch 7A, and based on the detection signal from the buckle switch 7B (7C). Check that the seat belt on the passenger seat (the right rear seat) is tightened.

  Then, the drunk driving prevention control device 5 grasps that the person seated in the driver's seat (scheduled driver) is restrained by the seat belt based on the detection signals from the seating sensor 6A and the buckle switch 7A. . Similarly, the drunk driving prevention control device 5 restrains a person sitting in the passenger seat (rear right seat) with a seat belt based on detection signals from the seating sensor 6B (6C) and the buckle switch 7B (7C). Know what is being done.

  And in all the seats in which the seating state is detected in this way (in this case, the driver's seat, the passenger seat, and the rear right seat), the person seated in the seat may be restrained by the seat belt. When grasped, the drunk driving prevention control device 5 determines that all the passengers are restrained in a seated state in any seat. In the present embodiment, the drunk driving prevention control device 5 corresponds to a restraint state determination unit.

  And the drunk driving prevention control device 5 is subject to such determination, and when alcohol detection is performed by the alcohol detector 4 (driver's alcohol detector), the alcohol detection obtained thereby. The results are treated as those of the prospective driver. In the present embodiment, the drunk driving prevention control device 5 corresponds to an alcohol subject specifying means.

  By the way, in the state where all the passengers are restrained in a seated state in any of the seats, a person other than the person seated in the driver's seat (planned driver) is the alcohol detector 4 (driver's alcohol detector). ) Cannot detect alcohol. Accordingly, the drunk driving prevention control device 5 validates the alcohol detection result signal from the alcohol detector 4 on the condition that the driving planner is confirmed to be an alcohol subject as described above. Then, information on the amount of alcohol in the breath contained in the breath is analyzed, and the magnitude relationship between the amount of alcohol in the breath and the reference alcohol amount is examined.

  After verifying the validity of the alcohol detection, it is determined that the alcohol detection by a person other than the driving person has not been performed. After that, the alcohol amount in the exhalation falls below the reference alcohol amount, and When the electronic key 2 is used, the drunk driving prevention control device 5 outputs an engine start permission signal to the engine control device 8. As a result, when the engine start button (not shown) is pressed in a state where the engine is allowed to start in this way, the engine is started by the engine control device 8 and, thereby, driving by a driving person who is not in a drinking state. Will be allowed.

  On the other hand, whether or not the authorized electronic key 2 is used when the alcohol detector 4 detects an alcohol amount that exceeds the reference alcohol amount even if the alcohol detection by a person other than the driver is not performed. Regardless of this, driving of the vehicle is prohibited.

  In the present embodiment, a drunk driving prevention system is constructed by the alcohol detector 4, the drunk driving prevention control device 5, the seating sensors 6A to 6D, and the buckle switches 7A to 7D. That is, such a drunk driving prevention system is applied to the automobile of the present embodiment, and drunk driving is prevented beforehand.

As described above, according to the present embodiment, the following operations and effects can be obtained.
(1) Assuming that all passengers are seated in one of the seats, when alcohol detection is performed by the alcohol detector 4 (driver's alcohol detector), the person who can do that is the driver's seat In this case, the alcohol detection result obtained thereby is treated as that of the person who is scheduled to drive. In other words, if this alcohol detection result indicates a drunk state, it means that the person who is planning to drive is in a drunk state. In this case, driving of the vehicle is prohibited, otherwise driving of the vehicle is prohibited. Is acceptable. Therefore, impersonation of alcohol detection by a person other than the driving person can be prevented.

  (2) In a state where all the passengers are restrained by the seat belts in their seats, persons other than those who are scheduled to drive cannot perform alcohol detection by the alcohol detector 4 (driver seat alcohol detector). Therefore, by specifying such a state, it is possible to reliably prevent impersonation of alcohol detection by a person other than the scheduled driver.

  (3) When the alcohol detection is appropriately performed with the person who is scheduled to drive as the alcohol subject and alcohol below the reference value is thereby detected, the engine is started if the regular electronic key 2 is not used. (Vehicle driving) is not allowed. Accordingly, the security level can be improved.

  (4) Since the alcohol detection is performed only by the single alcohol detector 4 (driver alcohol detector), it is sufficient for the passenger not to detect the alcohol. Therefore, the burden on the passenger can be reduced.

  (5) For example, when the seat belt of the seat where the seating state is detected is not tightened, alcohol detection by the alcohol detector 4 is invalidated, unless all the passengers wear the seat belt. The driving of the vehicle is not allowed. Accordingly, all the passengers naturally wear their seat belts, and thus the improvement of the seat belt wearing rate can be promoted.

(Second Embodiment)
Next, a second embodiment of the present invention will be described. In the first embodiment, the single alcohol detector 4 is provided in the vehicle. In the second embodiment, four alcohol detectors 4A to 4D are provided in the vehicle as shown in FIG. Is provided.

  The alcohol detector 4A can detect alcohol by a person sitting in the driver's seat (scheduled driver) and can detect alcohol by a person sitting in a seat other than the driver's seat (passenger). It is installed in no place. The alcohol detector 4B is installed in a place where a person sitting in a passenger seat can detect alcohol by the person and a person sitting in a seat other than the passenger seat cannot detect alcohol by the person.

  The alcohol detector 4C is installed in a place where a person sitting in the rear right seat can detect alcohol and a person sitting in a seat other than the rear right seat cannot detect alcohol. . The alcohol detector 4D is installed in a place where a person sitting in the rear left seat can detect alcohol and a person sitting in a seat other than the rear left seat cannot detect alcohol. .

  The alcohol detectors 4A to 4D have the same configuration as the alcohol detector 4 of the first embodiment, and each correspond to a passenger alcohol detector. In particular, the alcohol detector 4A corresponds to a driver seat alcohol detector.

  In the present embodiment, the drunk driving prevention control device 5 is electrically connected to seating sensors 6A to 6D and alcohol detectors 4A to 4D. In the second embodiment, unlike the first embodiment, the buckle switches 7A to 7D are not connected. Of course, the buckle switches 7A to 7D may be connected as in the first embodiment.

And also in this 2nd Embodiment, the device for preventing impersonation of the alcohol detection by a passenger is elaborated. This will be described below.
Here, as shown in FIG. 6, there are persons sitting in the driver's seat, the passenger seat, and the rear right seat, and the persons are in the state of detecting alcohol in the seated state at the seat there. Assume that the rear left seat is empty.

  In this case, the drunk driving prevention control device 5 grasps that there is a person seated in the driver's seat (planned driver) based on the detection signal from the seating sensor 6A, and the seating sensor 6B ( Based on the detection signal from 6C), it is understood that there is a person sitting in the passenger seat (the rear right seat).

  In addition, the drunk driving prevention control device 5 grasps that alcohol detection is being performed at the driver's seat based on the alcohol detection result signal from the alcohol detector 4A, and from the alcohol detector 4B (4C). Based on the alcohol detection result signal, it is grasped that alcohol detection is performed in the passenger seat (rear right seat).

  And the drunk driving prevention control device 5 grasps that the person (scheduled driver) sitting in the driver's seat is detecting alcohol based on the signals from the seating sensor 6A and the alcohol detector 4A. Similarly, in the drunk driving prevention control device 5, the person sitting in the passenger seat (the rear right seat) performs alcohol detection based on signals from the seating sensor 6B (6C) and the alcohol detector 4B (4C). Know that you are.

  And in all of the seats where the seating state is detected in this way (in this case, the driver's seat, the passenger seat, and the rear right seat), it is understood that the person seated in the seat is detecting alcohol When this is done, the drunk driving prevention control device 5 determines that all the passengers are performing alcohol detection in a seated state at any seat. In the present embodiment, the drunk driving prevention control device 5 corresponds to alcohol detection state determination means.

  And the drunk driving prevention control device 5 is based on the fact that such a determination has been made, and the alcohol detection result obtained by the alcohol detection by the alcohol detector 4A (the alcohol detector for the driver's seat) is that of the person who plans to drive. Is supposed to be treated as In the present embodiment, the drunk driving prevention control device 5 corresponds to an alcohol subject specifying means.

  By the way, in the state where all the passengers are detecting alcohol in a seated state at any of the seats, a person other than the person sitting in the driver's seat (planned driver) is the alcohol detector 4A (driver's alcohol The alcohol cannot be detected by the detector. Therefore, the drunk driving prevention control device 5 validates the alcohol detection result signal from the alcohol detector 4A on the condition that the driving planner is confirmed to be an alcohol subject as described above. Then, information on the amount of alcohol in the breath contained in the breath is analyzed, and the magnitude relationship between the amount of alcohol in the breath and the reference alcohol amount is examined.

  After verifying the validity of the alcohol detection, it is determined that the alcohol detection by a person other than the driving person has not been performed. After that, the alcohol amount in the exhalation falls below the reference alcohol amount, and When the electronic key 2 is used, the drunk driving prevention control device 5 outputs an engine start permission signal to the engine control device 8. As a result, when the engine start button (not shown) is pressed in a state where the engine is allowed to start in this way, the engine is started by the engine control device 8 and, thereby, driving by a driving person who is not in a drinking state. Will be allowed.

  On the other hand, whether or not the authorized electronic key 2 is used when the alcohol detector 4A detects an alcohol amount exceeding the reference alcohol amount even if the alcohol detection by a person other than the driving person is not performed. Regardless of this, driving of the vehicle is prohibited.

In this embodiment, the drunk driving prevention system is constructed by the drunk driving prevention control device 5, the seating sensors 6A to 6D, and the alcohol detectors 4A to 4D.
As described above, according to the present embodiment, the following operations and effects can be obtained.

  (6) On the assumption that all the passengers are seated in any of the seats, when alcohol detection is performed by the alcohol detector 4A (driver's alcohol detector), In this case, the alcohol detection result obtained thereby is treated as that of the person who is scheduled to drive. In other words, if this alcohol detection result indicates a drunk state, it means that the person who is planning to drive is in a drunk state. In this case, driving of the vehicle is prohibited, otherwise driving of the vehicle is prohibited. Is acceptable. Therefore, impersonation of alcohol detection by a person other than the driving person can be prevented.

  (7) In a state where all the passengers are detecting alcohol in their seats, no one other than the planned driver can detect alcohol by the alcohol detector 4A (driver's seat alcohol detector). Therefore, by specifying such a state, it is possible to reliably prevent impersonation of alcohol detection by a person other than the scheduled driver.

  (8) When the alcohol detection is properly performed with the person who is scheduled to drive as the alcohol subject, and the alcohol below the reference value is detected thereby, the engine is started if the regular electronic key 2 is not used. (Vehicle driving) is not allowed. Accordingly, the security level can be improved.

In addition, each said embodiment can also be changed and actualized as follows.
The drunk driving prevention control device 5 is in a stage before alcohol detection by the alcohol detector 4 (4A) is completed, and any of the seating sensors (at least one of 6A to 6D) changes from the seating state to the seating state. When the transition is detected, the alcohol detection result obtained by the alcohol detection by the alcohol detector 4 (4A) may be invalidated.

  According to this configuration, while alcohol detection is being performed by the alcohol detector 4 (4A), a person sitting in one of the seats leaves and alcohol detection by the alcohol detector 4 (4A) is detected. Even if it is performed, the alcohol detection result obtained by the alcohol detection is invalidated. For this reason, even if the person who has left the seat is not in a drunk state and the person is impersonating a driving person who is in a drunk state, alcohol detection is performed, thereby allowing the driver to drive the vehicle. Therefore, impersonation of alcohol detection by a person other than the driving person can be prevented.

  The drunk driving prevention control device 5 detects the transition from the sitting state to the leaving state at the stage after the driving of the vehicle is permitted through the alcohol detection by the alcohol detector 4 (4A), In addition, when at least one of the seating sensors 6B to 6D detects the transition from the seating state to the seating state, the driving of the vehicle may be prohibited. The drunk driving prevention control device 5 corresponds to a vehicle control unit that performs the above-described operation.

  According to this configuration, after the vehicle is allowed to drive through alcohol detection by the alcohol detector 4 (4A), at least two people including those who are seated in the driver's seat are withdrawn, Even if the vehicle is changed to another seat, driving of the vehicle is prohibited in this case. For this reason, after a person who is not in a drinking state performs alcohol detection by the alcohol detector 4 (4A) and thereby permits driving of the vehicle, a person who is in a drinking state sits in the driver's seat on his behalf. If you try to drive a car, you can't. Therefore, drunk driving due to transfer at the driver's seat can be prevented.

  The drunk driving prevention system as in each of the above embodiments is not limited to prohibiting engine start when alcohol exceeding a reference value is detected, and the shift lever is locked or the handle is locked. In short, what is necessary is that it is impossible to drive.

Next, a technical idea that can be grasped from the above embodiment and another example will be described.
[1] In the drunk driving prevention system according to any one of claims 1 to 3,
The alcohol test subject specifying means is configured for the driver seat when any seating sensor detects a transition from a seated state to a seated state at a stage before alcohol detection by the driver seat alcohol detector is completed. A drunk driving prevention system characterized by invalidating an alcohol detection result obtained by alcohol detection by an alcohol detector.

  According to this configuration, while alcohol detection is being performed by the alcohol detector for the driver's seat, a person who has been seated in one of the seats leaves and temporarily detects alcohol by the alcohol detector for the driver's seat. Even if it is, the alcohol detection result obtained by the alcohol detection is invalidated. For this reason, even if the person who has left the seat is not in a drunk state and the person is impersonating a driving person who is in a drunk state, alcohol detection is performed, thereby allowing the driver to drive the vehicle. Therefore, impersonation of alcohol detection by a person other than the driving person can be prevented.

[2] In the drunk driving prevention system according to any one of claims 1 to 3 and the technical idea [1],
The seat sensor of the driver seat detects a transition from the seated state to the seated state at a stage after the vehicle is permitted to drive through alcohol detection by the alcohol detector for the driver seat, and the seat sensor other than the driver seat A drunk driving prevention system comprising: vehicle control means for prohibiting driving of a vehicle when at least one of the switches detects a transition from a sitting state to a leaving state.

  According to this configuration, after the vehicle is allowed to drive after alcohol detection by the alcohol detector for the driver's seat, at least two people including those who are seated in the driver's seat are withdrawn and separated from each other. In this case, driving of the vehicle is prohibited even if the vehicle is changed to another seat. For this reason, after a person who is not in a drinking state performs alcohol detection with the alcohol detector for the driver's seat and thereby allows driving of the vehicle, a person who is in a drinking state sits in the driver's seat on behalf of that person. If you try to drive a vehicle, you can't. Therefore, drunk driving due to transfer at the driver's seat can be prevented.

The block diagram which shows the whole structure of the electronic key system applied to the motor vehicle of 1st Embodiment, and a partial structure of a drunk driving prevention system. Explanatory drawing which shows the predetermined area | region in a vehicle. The block diagram which shows the principal part structure of the drunk driving prevention system of 1st Embodiment. Explanatory drawing for demonstrating the impersonation prevention measure by the drunk driving prevention system of 1st Embodiment. The block diagram which shows the principal part structure of the drunk driving prevention system of 2nd Embodiment. Explanatory drawing for demonstrating the impersonation prevention measure by the drunk driving prevention system of 2nd Embodiment.

Explanation of symbols

  4 ... Alcohol detector (driver's alcohol detector), 4A ... Alcohol detector (driver's alcohol detector, passenger alcohol detector), 4B ... Alcohol detector (passenger alcohol detector), 4C ... alcohol detector (passenger alcohol detector), 4D ... alcohol detector (passenger alcohol detector), 5 ... drunk driving prevention control device (alcohol subject specifying means, restraint state determination means, alcohol detection state determination means) ), 6A to 6D ... Seating sensor, 7A to 7D ... Buckle switch.

Claims (3)

In the drunk driving prevention system that prohibits driving of the vehicle when alcohol exceeding the reference value is detected by the alcohol detector,
All seats including the driver's seat are equipped with seating sensors that detect whether the passenger is seated or not,
A person sitting in the driver's seat can detect alcohol by that, and a person seated in a seat other than the driver's seat can install alcohol detector for the driver's seat in a place where it can not detect alcohol by that,
Assuming that all passengers are seated in any of the seats, when alcohol detection is performed by the driver's alcohol detector, the alcohol detection result obtained by the detection is handled as that of the person who intends to drive. A drunk driving prevention system characterized by comprising alcohol subject identification means. In the drunk driving prevention system according to claim 1,
All seats are equipped with buckle switches that turn on when the seatbelt of the seat is tightened.
When the buckle switch provided in the seat where the seating sensor detects the seating state is ON, it is grasped that the person seated in the seat is restrained by the seat belt, and the seating sensor is seated. When all of the seats that detect the state are known, the restraint state determination means for determining that all the passengers are restrained in the seated state in any of the seats,
The alcohol subject identifying means is based on the driver seat alcohol detector, provided that the restraint state determination means determines that all passengers are restrained in a seated state in any seat. A drunk driving prevention system characterized in that when alcohol detection is performed, the alcohol detection result obtained by the detection is handled as that of a person scheduled to drive. In the drunk driving prevention system according to claim 1,
Boarding in all seats including the driver's seat where a person sitting in the seat can detect alcohol and a person sitting in a seat other than the seat cannot detect alcohol Installed an alcohol detector for the
When alcohol detection is performed by the alcohol detector for passengers in the seat where the seating sensor detects the seating state, it is understood that the person seated in the seat is detecting alcohol Alcohol that determines that all passengers are detecting alcohol in a seated state in any seat when the seating sensor detects that in all seats. Provided with detection state determination means,
The alcohol test subject specifying means is configured such that the alcohol detection state determination means determines that all the passengers are performing alcohol detection in a seated state in any seat, on the condition that the alcohol for the driver's seat is determined. A drunk driving prevention system characterized in that an alcohol detection result obtained by alcohol detection by a detector is treated as that of an intended driver.

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