JP2008217233A - Drunk driving prevention device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve acceptability for a device by properly using both a means for measuring alcohol concentration in air inside a vehicle cabin and a means for measuring alcohol concentration in the breath of a driver. <P>SOLUTION: This drunk driving prevention device (1) is provided with: a cabin alcohol concentration measuring means (10) for measuring alcohol concentration in air inside the vehicle cabin; an alcohol concentration measuring means (20) for measuring alcohol concentration in the breath of the driver; and drunk driving preventing operation means (50, 60, 70) for performing a first operation for prompting the driver to use the driver alcohol concentration measuring means based on the measurement result of the cabin alcohol concentration measuring means, and for performing a second operation for suppressing a drunk driving based on the measurement result of the driver alcohol concentration measuring means. The drunk driving preventing operation means has a means for suppressing the first operation within a predetermined time after measuring alcohol concentration less than predetermined value by the driver alcohol concentration measuring means. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a drunk driving prevention apparatus that performs an operation for suppressing drunk driving based on a result of an alcohol test performed by a driver.

  In recent years, from the viewpoint of safe driving, for example, testing equipment for testing alcohol contained in a driver's breath (hereinafter, this type of testing, including testing of saliva, blood, etc., is collectively referred to as alcohol testing) Research is being conducted on a device that is installed in the vicinity and permits the vehicle to run only when it is confirmed that the driver is not drunk or drunk by an alcohol test using the device.

As related to these devices, the alcohol reaction in the air in the passenger compartment is confirmed at the time of starting the vehicle, and if there is an alcohol reaction, the driver is instructed to blow into the exhalation mouse. Discloses a technique for disabling travel when an alcohol reaction is recognized (see, for example, Patent Document 1).
JP-A-2005-206128

  However, in the above prior art, the alcohol reaction in the air in the passenger compartment is confirmed, the driver is instructed to breathe, and after no alcohol reaction is recognized by the driver's breath, There is a case where the alcohol reaction in the air is confirmed and the driver is instructed to blow the breathing mouse again.

  The present invention is to solve such problems, and appropriately uses both means for measuring the alcohol concentration in the air in the passenger compartment and means for measuring the alcohol concentration in the driver's breath. Thus, a main object is to provide a drunk driving prevention device capable of enhancing the acceptability of the device.

  In order to achieve the above object, one aspect of the present invention includes: an alcohol concentration measuring means for measuring the alcohol concentration in the air in the passenger compartment; and an alcohol concentration for the driver that measures the alcohol concentration in the breath of the driver. Based on the measurement results of the measuring means and the alcohol concentration measuring means for the passenger compartment, a first operation for prompting the driver to use the alcohol concentration measuring means for the driver is performed, and the measurement result of the alcohol concentration measuring means for the driver is measured. And a drunk driving prevention operation means for performing a second operation for suppressing drunk driving, wherein the drunk driving prevention operation means measures an alcohol concentration less than a predetermined concentration by the driver alcohol concentration measurement means. The drunk driving prevention device, which is a means for suppressing the first operation, is performed within a predetermined period after being performed.

  According to this aspect of the present invention, the driver is encouraged to use the alcohol concentration measuring means for the driver within a predetermined period after the alcohol concentration measuring means for the driver measures the alcohol concentration lower than the predetermined concentration. Therefore, it is possible to suppress the driver from feeling troublesome by being excessively prompted by the driver to use the alcohol concentration measuring means for the driver. That is, the acceptability for the device can be increased.

  In one aspect of the present invention, the drunk driving prevention operation means stops the vehicle interior alcohol concentration measurement means, for example, within a predetermined period after the alcohol concentration measurement means for the driver measures an alcohol concentration lower than the predetermined concentration. This is means for suppressing the first operation.

  Further, in one aspect of the present invention, the drunk driving prevention operation means is measured by the vehicle interior alcohol concentration measurement means within a predetermined period after the alcohol concentration measurement means for the driver measures an alcohol concentration lower than the predetermined concentration. The first operation may be suppressed by not performing the first operation regardless of the value.

  In one aspect of the present invention, the drunk driving prevention operation means is a reference for performing the first operation within a predetermined period after the alcohol concentration measurement means for the driver measures an alcohol concentration lower than the predetermined concentration. It may be a means for suppressing the first operation by changing the alcohol concentration high.

  In one aspect of the present invention, it is preferable that the driver alcohol concentration measurement unit is configured to be usable regardless of the operating state of the vehicle interior alcohol concentration measurement unit.

  Further, in one aspect of the present invention, the driver alcohol concentration measurement means does not measure the alcohol concentration in the driver's breath, but may measure the alcohol concentration in the driver's saliva. .

  According to the present invention, both the means for measuring the alcohol concentration in the air in the passenger compartment and the means for measuring the alcohol concentration in the driver's breath can be appropriately used to increase the acceptability of the device. A possible drunk driving prevention device can be provided.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to the accompanying drawings.

<First embodiment>
The drunk driving prevention apparatus 1 according to the first embodiment of the present invention will be described below. The drunk driving prevention device 1 basically assumes that when the alcohol concentration in the air in the passenger compartment exceeds a specified value, it is estimated that some of the occupants are in a drunk state, and the driver receives an alcohol test. It is a device that allows the vehicle to run when prompted and shown that the driver is not in a drinking state after undergoing an alcohol test.

[Constitution]
FIG. 1 is a diagram illustrating an example of the overall configuration of the drunk driving prevention device 1. The drunk driving prevention device 1 includes, as main components, an alcohol concentration measuring device 10 for a passenger compartment, an alcohol concentration measuring device 20 for a driver, a seating state detecting device 30, an ignition switch 40, an HMI (Human Machine Interface). ) 50, an engine control computer 60, and an ECU (Electronic Control Unit) 70 for drunk driving prevention device.

  The vehicle interior alcohol concentration measurement device 10 is disposed at any position in the vehicle compartment, for example, around the combination meter, and measures the alcohol concentration in the air in the vehicle interior. The measurement value of the alcohol concentration measuring device 10 for the passenger compartment is transmitted to the drunk driving prevention device ECU 70 via an analog / digital converter or the like.

  The driver alcohol concentration measurement device 20 is, for example, a device that can detect the alcohol concentration contained in the driver's breath, and includes a breath-inlet and an inspection sensor. For example, in a domestic vehicle where the driver's seat is on the right side of the vehicle, the breath-inlet, for example, the right part of the steering column on the instrument panel, where it is difficult to receive an inspection unless seated in the driver's seat It is desirable to be disposed in the area. Thereby, it is possible to increase the certainty that the driver has been inspected. The driver's exhaled air that has been blown into the exhalation port is supplied to the inspection sensor through a dedicated channel. The inspection sensor includes, for example, a pressure sensor and a humidity sensor for confirming that human exhalation is actually blown instead of blowing by a portable pump or the like, and an alcohol gas sensor for measuring alcohol concentration in the exhalation. The output value of the inspection sensor is transmitted to the drunk driving prevention device ECU 70 via an analog / digital converter or the like. Note that the driver alcohol testing device 20 is not limited to detecting alcohol concentration in exhaled breath, and may be one that detects saliva alcohol concentration or blood alcohol concentration. Hereinafter, appropriately measuring the alcohol concentration by blowing the breath into the driver alcohol concentration measurement device 20 is expressed as “alcohol test”.

  The seating state detection device 30 is a device for confirming that the driver is seated in the driver seat. For example, a strain gauge, a load cell, a diaphragm, a bellows, or the like disposed on the seating surface of the driver seat is used. A pressure sensor is used. In this case, the pressure generated by the driver sitting in the driver's seat is output to the drunk driving prevention device ECU 70. The present invention is not limited to this, and a courtesy lamp switch, a seat belt buckle switch for detecting the open / closed state of the driver's seat side door, a camera for capturing a driver's face image, or the like may be used.

  The HMI 50 includes, for example, a display device configured to display an image and allow a user to perform various input operations as a touch panel, and a microphone, speaker, buzzer, and the like for voice input / output. Touch operation performed on a GUI (Graphical User Interface) switch set on the display screen of the display device, and voice input to a microphone are for a drunk driving prevention device via a GUI module, a voice recognition module, etc. It is transmitted to the ECU 70. Further, the display content of the display device and the output content of the speaker and the buzzer are determined by the drunk driving prevention device ECU 70.

  The engine control computer 60 is, for example, a computer unit in which a ROM, a RAM, and the like are connected to each other via a bus with a CPU at the center, and other storage media such as an HDD (Hard Disc Drive) and a DVD (Digital Versatile Disk). And I / O ports, timers, counters, etc. The ROM stores programs and data executed by the CPU. The engine control computer 60 centrally controls a throttle motor, an igniter, a starter motor, a transmission, and the like. When the engine control computer 60 receives an engine start signal from the drunk driving prevention device ECU 70, the engine control computer 60 drives the starter motor to start the engine.

  The drunk driving prevention device ECU 70 is a computer unit having a hardware configuration similar to that of the engine control computer 60, for example. When the ECU 70 for drunk driving prevention device receives the ignition ON signal from the ignition switch 40, the engine 70 according to the measurement results of the alcohol concentration measuring device 10 for the passenger compartment and the alcohol concentration measuring device 20 for the driver so far A start signal is transmitted to the engine control computer 60 or not. Moreover, the drunk driving prevention device ECU 70 transmits an instruction signal to each of the above-described components, and realizes the characteristic functions of the present invention described below.

[Operation]
FIG. 2 is a flowchart showing a characteristic processing flow executed by the drunk driving prevention device ECU 70. This flow is started when the vehicle is started (for example, when an ACC ON signal is transmitted from the ignition switch 40).

  First, the drunk driving prevention device ECU 70 is in a state where it does not transmit an engine start signal to the engine control computer 60 (hereinafter referred to as an engine start prohibited state) even if it receives an ignition on signal from the ignition switch 40. (S100).

  Subsequently, it is determined whether or not a shortcut instruction has been given by the driver (S102). Here, the shortcut instruction is to allow the driver to voluntarily use the driver alcohol concentration measurement device 20 and to quickly obtain permission to travel as described later. Specifically, it may be an input operation to the HMI 50, or the driver has blown into the breath-inlet of the driver alcohol concentration measuring device 20 (a pressure sensor in the driver alcohol concentration measuring device 20). It is also possible to determine that a shortcut instruction has been made based on the fact that a pressure of a predetermined value or more has been detected.

  When the driver does not give a shortcut instruction, measurement is performed by the vehicle interior alcohol concentration measurement device 10 (S104), and it is determined whether or not the measurement value of the vehicle interior alcohol concentration measurement device 10 is greater than or equal to a threshold value D1. (S106).

  When the measured value of the alcohol concentration measuring device 10 for the passenger compartment is less than the threshold value D1, if an ignition-on signal is received from the ignition switch 40, the engine start signal is transmitted to the engine control computer 60 ( Hereinafter, it is referred to as an engine start permission state) (S108).

  For convenience of description in the flowchart, the determination in S102 is performed prior to the measurement of the alcohol concentration in the air in the passenger compartment, but a shortcut instruction is accepted any time until the engine start permission state in S108. Good thing.

  Subsequently, it is determined whether the measured flag is 0 or 1 (S110). Here, the measured flag is used to determine whether or not the driver's alcohol concentration measurement device 20 performs measurement and confirms that the driver is not in a drunk state. A value 1 is set when it is confirmed that the driver is not in a drunk state, and a value 0 is set otherwise. The measured flag is stored in a predetermined area on the RAM of the drunk driving prevention device ECU 70, for example.

  When the measured flag is 0, measurement is performed by the vehicle interior alcohol concentration measurement device 10 (S112), and it is determined whether or not the measurement value of the vehicle interior alcohol concentration measurement device 10 is greater than or equal to the threshold value D1 #. (S114). When the measured value of the alcohol concentration measuring apparatus 10 for the passenger compartment is less than the threshold value D1 #, it is determined whether the driver has left the seat by referring to the output of the seating state detection device 30 (S116).

  If it is determined in S116 that the driver has not left the seat, the process returns to S112, and it is determined that the measured value of the alcohol concentration measuring device 10 for the passenger compartment is equal to or greater than the threshold value D1 # or that the driver has left the seat. In the meantime, the measurement by the vehicle interior alcohol concentration measuring apparatus 10, the determination of the measurement value, and the determination of the absence of seat are periodically executed (S112 to S116). Thus, for example, in a case where the alcohol contained in the exhalation of the drinker gradually fills the passenger compartment after time has elapsed since the ride or in a case where the driver drunk while driving, the driver It is possible to appropriately monitor whether or not an occupant including is in a drinking state. It is appropriate that the threshold value D1 # is a value equal to or greater than the threshold value D1. This is because it is appropriate to increase the sensitivity of alcohol detection at the time of starting the vehicle and perform alcohol detection strictly, and when alcohol is filled in the passenger compartment later, alcohol can be detected even if the sensitivity is slightly reduced.

  In this repetition, if it is determined in S114 that the measured value of the alcohol concentration measuring device 10 for the passenger compartment is equal to or greater than the threshold value D1 #, the vehicle is gradually stopped (S118), and the measured flag is set to 0. After setting (S120), one routine of this flow is terminated. Here, “slowly stop the vehicle” means, for example, that the HMI 50 announces that the engine is to be stopped, performs vehicle speed limit control that gradually lowers the vehicle speed upper limit, and after a sufficient time has passed since the announcement. It means that stepwise control such as stopping the engine is performed. Thereafter, this flow is executed again from the state where the engine start is prohibited in S100.

  If it is determined in S116 that the driver has left the seat, the measured flag is set to 0 (S120), and one routine of this flow is terminated. Thereafter, the engine start is prohibited in S100, and the subsequent processing is executed (S102 ~). Thereby, after a third party performs an alcohol test, it is possible to prevent an unauthorized use in which a drunk driver starts driving in turn. In consideration of erroneous determination in the absence determination, the vehicle may be gradually stopped via S118 even when it is determined that the driver has left.

  On the other hand, if it is determined in S106 that the measured value of the alcohol concentration measuring device 10 for the passenger compartment is equal to or greater than the threshold value D1, the driver is prompted to use the driver alcohol concentration measuring device 20 to undergo an alcohol test. (S122) Waiting for breath to be blown (S124), it is determined whether or not the measured value of the driver alcohol concentration measurement device 20 is equal to or greater than the threshold value D2 (S126). This is because it is estimated that someone in the crew is in a drinking state. If the threshold value D1 is set to be equal to or less than the threshold value D1 # in advance, if the measured value of the vehicle interior alcohol concentration measurement device 10 is equal to or greater than the threshold value D1 # in S114, the alcohol concentration measurement in the vehicle interior is necessarily performed in S106. Since the measured value of the device 10 is equal to or greater than the threshold value D1 #, an alcohol test is imposed on the driver.

  If the driver gives a shortcut instruction in S102, the driver has chosen to use the driver's alcohol concentration measuring device 20 on his / her own intention, so the announcement of S122 is not made and exhalation is infused. (S124), it is determined whether or not the measured value of the driver alcohol concentration measurement device 20 is equal to or greater than the threshold value D2 (S126).

  When the measured value of the driver alcohol concentration measurement device 20 is equal to or greater than the threshold value D2, it can be determined that the driver is in a drunk state. Accordingly, no processing is performed and one routine of this flow is terminated. As a result, traveling of the vehicle is prohibited.

  On the other hand, if the measured value of the driver alcohol concentration measurement device 20 is less than the threshold value D2, a value of 1 is set in the measured flag (S128), and the engine is allowed to start (S108). Thereafter, in S110, it is determined that the measured flag has a value of 1. As a result, after waiting for a predetermined time T1 to elapse (S130), measurement by the vehicle interior alcohol concentration measuring device 10 is started. (S112). It should be noted that during the predetermined time lapse waiting process of S130 or continuously during the execution of this flow, the absence determination of S116 is performed, and this flow is terminated when the driver's absence is detected. Also good.

  In the drunk driving prevention apparatus 1 of this embodiment, when the driver's alcohol concentration measuring device 20 is not urged to be used every time the user gets on the vehicle, when the measured value of the vehicle alcohol concentration measuring device 10 is equal to or greater than the threshold value. Only encourage alcohol testing. Thereby, the troublesomeness at the time of having to perform an alcohol test | inspection every time of boarding can be reduced. In particular, a driver or the like who performs a delivery service by a vehicle frequently gets on and off the vehicle, so it is not practical to perform an alcohol test every time he gets on.

  Moreover, in the drunk driving prevention apparatus 1 of the present embodiment, when it is confirmed as a result of the alcohol test that the driver is not in the drunk state, the vehicle by the vehicle interior alcohol concentration measuring apparatus 10 is used for a predetermined time thereafter. The room air is not monitored. Therefore, after the alcohol concentration in the air in the passenger compartment becomes equal to or higher than the threshold value and the alcohol test is instructed to confirm that the driver is not in a drinking state, the alcohol concentration measuring device 10 for the passenger compartment again determines the alcohol concentration higher than the threshold value. It is possible to suppress a dignified tour in which the concentration is measured and an alcohol test is instructed.

  Further, when the driver gives a shortcut instruction, the driver can get an engine start permission promptly after receiving an alcohol test without waiting for the determination in S106. Thereby, for example, when it is known that an occupant other than the driver is in a drunk state and the driver himself is not in a drunk state, the measurement by the alcohol concentration measuring device 20 for the driver is performed by the alcohol concentration measuring device 10 for the vehicle interior. In the case where only a short time is required, the time required for the measurement by the vehicle interior alcohol concentration measuring apparatus 10 can be omitted (reduced).

  Therefore, both the vehicle interior alcohol concentration measurement device 10 and the driver alcohol concentration measurement device 20 can be appropriately used to increase the acceptability of the device (reduce the annoyance).

<Second embodiment>
Hereinafter, the drunk driving prevention apparatus 2 according to the second embodiment of the present invention will be described. The drunk driving prevention device 2 is basically the same as the drunk driving prevention device 1 according to the first embodiment. When the alcohol concentration in the air in the passenger compartment exceeds a specified value, a passenger is in a drunk state. It is a device that permits the vehicle to run when the driver is urged to undergo an alcohol test and the driver has received an alcohol test and indicated that the vehicle is not in a drinking state.

[Constitution]
Since the drunk driving prevention device 2 of the second embodiment has the same hardware configuration as the drunk driving prevention device 1 of the first embodiment, the same reference numerals are given to the respective components, and the description thereof is omitted.

[Operation]
FIG. 3 is a part of a flowchart showing a flow of characteristic processing executed by the drunk driving prevention apparatus ECU 70 according to the present embodiment. Since the processing before the engine start permission is common to the first embodiment, the description thereof is omitted.

  In this embodiment, when it is determined that the measured flag is a value 1, the vehicle is used with a threshold D1 * that is a value equal to or greater than the threshold D1 # until a predetermined time T1 elapses after the engine start permission is obtained. The alcohol concentration in the indoor air is monitored (S132 to S138). As a result, the sensitivity of monitoring the alcohol concentration in the air in the passenger compartment is greater than when the engine start permission is obtained without passing through the alcohol inspection after the engine start permission is obtained after the alcohol inspection. Will be reduced.

  As a result, the alcohol concentration in the air in the passenger compartment becomes equal to or higher than the threshold value, and after the alcohol test is instructed to confirm that the driver is not in a drunk state, the vehicle interior alcohol concentration measuring device 10 again exceeds the threshold value. It is possible to suppress a dignified tour in which the alcohol concentration is measured and an alcohol test is instructed.

  In addition, since the driver can give a shortcut instruction, it is known that an occupant other than the driver is in a drunk state and the driver himself is not in a drunk state, or measurement by the driver alcohol concentration measuring device 20 is possible. When the time required for the vehicle interior alcohol concentration measurement apparatus 10 is shorter than that of the vehicle interior alcohol concentration measurement apparatus 10, the time required for the measurement of the vehicle interior alcohol concentration measurement apparatus 10 can be omitted (reduced).

  Therefore, both the vehicle interior alcohol concentration measurement device 10 and the driver alcohol concentration measurement device 20 can be appropriately used to increase the acceptability of the device (reduce troublesomeness).

  The best mode for carrying out the present invention has been described above with reference to the embodiments. However, the present invention is not limited to these embodiments, and various modifications can be made without departing from the scope of the present invention. And substitutions can be added.

  For example, as an example of the “predetermined period after the alcohol concentration less than the predetermined concentration is measured by the driver alcohol concentration measuring means” in the claims, the period from when the engine start permission is obtained until the predetermined time T1 elapses However, this is described as “until the engine actually starts (in other words, until the IG on signal is received from the ignition switch 40)”, “the driver's absence is detected. May be replaced with “until the engine is stopped” (see FIG. 4), “until the engine stops” (see FIG. 5), or the like. In FIGS. 4 and 5, as in FIG. 3, the processing for obtaining the engine start permission is not shown.

  In addition, as described above, “in the period until the engine actually starts”, “until the driver's departure is detected”, or “until the engine stops” However, the alcohol concentration in the air in the passenger compartment may be monitored using a higher threshold value during these periods as in the second embodiment. Of course.

  Further, the absence determination in S116 is always performed regardless of the flowchart, and the processing may be started from the beginning of the flowcharts of FIGS. 2 to 5 every time a driver's departure is detected.

  In addition, as an example of the “operation for suppressing drunk driving” in the claims, the prohibition of engine start is exemplified, but the parking brake may be automatically operated or the shift position is forced. Therefore, the vehicle may be disabled by changing to P (parking) or N (neutral). In this way, the vehicle is prohibited from running but the engine itself is allowed to start, and the air conditioner and the like can be sufficiently operated. Further, instead of prohibiting the traveling of the vehicle, the vehicle speed may be limited to a certain vehicle speed, or a report to the outside of the vehicle may be made.

  Moreover, although the control example performed by setting the alcohol concentration measurement in the air in the passenger compartment and the determination based on the measured value of the alcohol concentration in the air in the passenger compartment is illustrated, the alcohol concentration measurement in the air in the passenger compartment is illustrated. (Sensing) itself may be always performed (see FIG. 6 shown as a modification of the first embodiment).

  Moreover, you may use what combined the microphone and the alcohol gas sensor as a structural example of the alcohol concentration measuring apparatus 20 for drivers | operators. In this case, the identity of the driver can be confirmed by voice recognition.

  Further, the driver alcohol concentration measurement device 20 is not limited to the device that measures the alcohol concentration in the breath of the driver, but may be a device that measures the alcohol concentration in the saliva of the driver.

  The present invention can be used in the automobile manufacturing industry, the automobile parts manufacturing industry, and the like.

It is a figure which shows an example of the whole structure of the drunk driving prevention apparatus. It is a flowchart which shows the flow of the characteristic process performed by ECU70 for drunk driving prevention apparatuses which concern on 1st Example. It is a part of flowchart which shows the flow of the characteristic process performed by ECU70 for drunk driving prevention apparatuses which concerns on 2nd Example. It is a part of flowchart which shows the flow of the characteristic process performed by ECU70 for drunk driving prevention apparatuses which concern on another Example. It is a part of flowchart which shows the flow of the characteristic process performed by ECU70 for drunk driving prevention apparatuses which concern on another Example. It is a flowchart which shows the flow of the characteristic process performed by ECU70 for drunk driving prevention apparatuses which concern on another Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Drunk driving prevention device 10 Alcohol concentration measuring device for passenger compartment 20 Alcohol concentration measuring device for driver 30 Seating state detection device 40 Ignition switch 50 HMI
60 Engine control computer 70 Drunk driving prevention ECU

Claims (7)

A vehicle interior alcohol concentration measuring means for measuring the alcohol concentration in the air in the vehicle interior;
An alcohol concentration measuring means for the driver for measuring the alcohol concentration in the breath of the driver;
Based on the measurement result of the alcohol concentration measuring means for the passenger compartment, a first operation for prompting the driver to use the alcohol concentration measuring means for the driver is performed, and the measurement result of the alcohol concentration measuring means for the driver is obtained. And a drunk driving prevention operation means for performing a second operation for suppressing drunk driving,
The drunk driving prevention operation means is means for suppressing the first operation for a predetermined period after the alcohol concentration measurement means for driver measures an alcohol concentration lower than a predetermined concentration.
Drunk driving prevention device. The drunk driving prevention device according to claim 1,
The drunk driving prevention operation means stops the vehicle interior alcohol concentration measurement means during a predetermined period after the alcohol concentration measurement means for driver measures an alcohol concentration lower than a predetermined concentration, thereby stopping the vehicle interior alcohol concentration measurement means. 1 is a means for suppressing the operation of 1.
Drunk driving prevention device. The drunk driving prevention device according to claim 1,
The drunk driving prevention operation means is configured to perform the first operation regardless of the measured value of the vehicle interior alcohol concentration measurement means within a predetermined period after the alcohol concentration measurement means for the driver measures an alcohol concentration less than a predetermined concentration. Means for suppressing the first operation by not performing the operation of 1.
Drunk driving prevention device. The drunk driving prevention device according to claim 1,
The drunk driving prevention operation means changes the alcohol concentration serving as a reference for performing the first operation to a high level within a predetermined period after the alcohol concentration measurement means for the driver measures an alcohol concentration lower than the predetermined concentration. Means for suppressing the first operation by
Drunk driving prevention device. The drunk driving prevention device according to any one of claims 1 to 4,
The drunk driving prevention apparatus, wherein the driver alcohol concentration measuring means is configured to be usable regardless of an operating state of the vehicle interior alcohol concentration measuring means. A drunk driving prevention apparatus according to any one of claims 1 to 5,
The drunk driving prevention apparatus, wherein the driver alcohol concentration measuring means is configured to be usable regardless of the measurement result of the vehicle interior alcohol concentration measuring means.   7. An alcohol concentration measuring means for a driver for measuring an alcohol concentration in the saliva of the driver, instead of the alcohol concentration measuring means for the driver for measuring the alcohol concentration in the breath of the driver. The drunk driving prevention device according to 1.

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