JP5660601B2 - Drunken driving prevention device and driver impersonation prevention method - Google Patents

Description

  The present invention relates to a drunk driving prevention device and a driver impersonation prevention method.

  Efforts are being made to eradicate drunk driving, such as raising penalties for drunk driving, and revising the Road Traffic Act, which includes the provision of alcoholic beverages and the prohibition of riding. Under such circumstances, efforts are being made toward practical use of drunk driving prevention devices, and drunk driving prevention devices are being developed by automobile manufacturers and auto parts manufacturers in Japan and overseas. As a method for measuring alcohol by the drunk driving prevention device, there are a breath blowing type and an odor sensor type. The exhalation-blowing method requires time and effort to inject strong exhalation at every measurement, and both the exhalation-blowing method and the odor sensor method have low measurement accuracy. In addition, in any measurement method, it is possible to avoid measurement by impersonating the driver such that the driver who has drunk changes the driving after passing the alcohol measurement by the driver who has not drunk.

  Therefore, a drunk driving prevention device that combines drinking determination based on alcohol detection in blood and personal authentication based on biometric information has been proposed (Patent Document 1).

JP2008-302915

  In the drunk driving prevention device described in Patent Document 1, the driver's finger is irradiated with light containing an alcohol-absorbing light component having a wavelength that is absorbed by the alcohol component. Since it is determined whether or not the alcohol component is present in the blood vessel of the person's finger, the driver's intake of alcohol can be reliably detected. In addition, since personal authentication is performed based on the biometric information of the driver's finger, it is possible to reliably detect alcohol intake for the driver himself / herself.

  However, since the personal authentication and the drinking determination are performed only at the start of driving, the driver can be impersonated by changing the driver after the personal authentication and the drinking determination at the start of driving are completed.

  Then, an object of this invention is to provide the drunk driving prevention apparatus which can prevent a driver's impersonation even after a driving | operation is started.

A drunk driving prevention apparatus according to the present invention includes a personal authentication unit that performs personal authentication based on biometric information of a driver's finger, a drunk determination unit that performs drunk determination by detecting alcohol from a blood vessel of a driver's finger, and a fixed period. personal authentication means to execute the personal authentication is executed drinking determination drinking determining means, in accordance with the determination result of the drinking determined that the authentication of the personal authentication is disabled driving operation of the vehicle, Ru stops the engine Control means, the control means is provided with a timer, starts the timer when the driver starts the engine or operates the shift lever, and when the timer set time elapses, the personal authentication by the personal authentication means and the drinking determination means If you pass a personal identification and a drinking judgment by restarting the timer, you could not pass either a personal identification or a drinking judgment If the engine of the vehicle is stopped, characterized in that to lock the steering of the vehicle.

A driver spoofing prevention method according to the present invention is a driver spoofing prevention method executed in a vehicle system equipped with a drunk driving prevention device, and starts a timer when an engine is started or a shift lever is operated by the driver. When the timer set time elapses, personal authentication based on the biometric information of the driver's finger and drinking determination by alcohol detection from the blood vessel of the driver's finger are performed, and when the personal authentication and drinking determination are passed, The timer is restarted, and when either the personal authentication or the drinking determination cannot be passed, the engine of the vehicle is stopped and the steering of the vehicle is locked .

  According to the present invention, the driver attaches a sensor having an authentication function for performing personal authentication based on biometric information on the finger and an alcohol detection function to the back surface of the steering wheel where the driver always puts the finger during driving, and driving by the sensor. The driver's impersonation can be prevented by performing the driver's personal authentication and drinking determination at regular intervals such that the driver cannot change.

It is a lineblock diagram showing an example of a driver's seat of a vehicle to which a 1st embodiment is applied. It is a block diagram which shows an example of the sensor part 100 in Embodiment 1 of this invention. 1 is a block diagram illustrating an example of a vehicle system to which a first embodiment is applied. It is a flowchart which shows the operation | movement of the 1st Embodiment of this invention. It is a block diagram which shows the principal part of this invention. It is a block diagram which shows the principal part of this invention. It is a block diagram which shows the principal part of this invention.

Embodiment 1. FIG.
A first embodiment of the present invention will be described below with reference to the drawings.

  FIG. 1 is a configuration diagram illustrating an example of a driver's seat of a vehicle to which the first embodiment is applied. In the vehicle driver's seat shown in FIG. 1, one sensor unit 100 is embedded in each of two left and right upper portions of the rear surface of the steering 3. The driver grips the steering wheel by placing the fingers to be measured on the left and right hands on each sensor unit 100. The sensor unit 100 may be attached to an arbitrary place by the user without being embedded in the steering 3. Further, the finger to be measured may be arbitrarily changed by the user.

  FIG. 2 is a configuration diagram illustrating an example of the sensor unit 100 according to the first embodiment of the present invention. As shown in FIG. 2, the sensor unit 100 is installed on the circuit board 108. The sensor unit 100 includes a lens 101, an image sensor 102, a vein pattern imaging light source 103, an alcohol imaging light source 104, a finger placement unit 106, and a finger placement surface 107. The image sensor 102, the vein pattern imaging light source 103, and the alcohol imaging light source 104 are electrically connected via a circuit board 108.

  The finger placement unit 106 has a recess formed in a size that can accommodate the driver's finger. A vein pattern imaging light source 103 and an alcohol imaging light source 104 are installed on both side surfaces inside the recess of the finger placement unit 106.

  The finger placement surface 107 is made of a material that transmits a light component emitted from the vein pattern imaging light source 103 and a light component emitted from the alcohol imaging light source 104.

  The vein pattern imaging light source 103 irradiates the concave portion of the finger placement unit 106 with light including a light component having a wavelength that is absorbed by the reduced hemoglobin component flowing through the veins of the human body.

  The alcohol imaging light source 104 irradiates the concave portion of the finger placement unit 106 with light containing a light component having a wavelength that is absorbed by the alcohol component.

  The image sensor 102 receives a light component having a wavelength that is absorbed by the reduced hemoglobin component, and images the driver's finger 4 placed on the finger rest surface 107. The light component is absorbed by the reduced hemoglobin component flowing through the vein of the driver's finger 4, and the portion where the light component is absorbed appears black in the captured image as a vein pattern. As a result, the vein pattern of the driver's finger 4 can be acquired. Further, the driver's personal authentication can be performed by comparing the driver's vein pattern stored in the storage unit 204 in advance with the captured vein pattern.

  The image sensor 102 receives a light component having a wavelength that is absorbed by the alcohol component, and images the driver's finger 4 placed on the finger rest surface 107. When the driver drinks alcohol and the alcohol component is flowing in the vein or artery of the finger 4 of the driver, the light component is absorbed by the alcohol component, and the portion where the light component is absorbed appears black in the captured image. Thereby, it is possible to detect whether or not the driver is taking alcohol.

  FIG. 3 is a block diagram illustrating an example of a vehicle system to which the first embodiment is applied. As shown in FIG. 3, the sensor unit 100 includes a light source driving unit 105. The light source driving unit 105 is electrically connected to each component of the sensor unit 100 via the circuit board 108.

  The vehicle system shown in FIG. 3 includes an MPU 200 that controls the operation of the sensor unit 100. The MPU 200 includes a control unit 201, a ROM (Read Only Memory) 202, a RAM (Random Access Memory) 203, a storage unit 204, a connection unit 205, and a communication unit 206.

  The ROM 202 stores a software program necessary for operating the MPU 200.

  The RAM 203 records temporary data that is generated when the control processing or arithmetic processing of the control unit 201 is executed. In addition, the captured image data received from the image sensor 102 via the connection unit 205 is temporarily stored.

  The storage unit 204 is configured by a nonvolatile memory that can rewrite data. The storage unit 204 stores in advance a driver's vein pattern by a vehicle manufacturer, an operation manager, or the like.

  The connection unit 205 is connected to the image sensor 102 and the light source driving unit 105.

  The communication unit 206 is connected to a steering control unit 501, an engine control unit 502, a shift lever control unit 503, and other devices mounted on a vehicle via a network 500 such as a CAN (Controller Area Network). The communication unit 206 transmits and receives data, messages, and the like to and from the steering control unit 501, the engine control unit 502, the shift lever control unit 503, and other devices.

  The steering control unit 501 controls the vehicle steering device. When the lock request message is received from the communication unit 206, the steering is locked so that the driver cannot operate the steering.

  The engine control unit 502 controls the vehicle engine. When the vehicle stop request message is received from the communication unit 206, the engine start is locked when the vehicle engine is stopped. Further, when the vehicle engine is operating, the engine is immediately stopped. When the engine is started by the driver, an engine start notification message is transmitted.

  The shift lever control unit 503 controls the shift lever. When the shift lever is operated by the driver, a shift lever operation notification message is transmitted.

  The light source drive unit 105 controls turning on and off of the vein pattern imaging light source 103 and the alcohol imaging light source 104 in accordance with the drive command received from the MPU 200 via the connection unit 205.

  When the imaging element 102 receives an imaging command from the MPU 200 via the connection unit 205, the imaging element 102 performs imaging.

  The control unit 201 transmits a drive command to the light source driving unit 105 via the connection unit 205. Further, the control unit 201 transmits an imaging command to the imaging element 102 via the connection unit 205. In addition, a captured image is acquired from the image sensor 102, and the acquired captured image is temporarily stored in the RAM 203.

  In addition, the control unit 201 transmits control messages such as a lock request message and a vehicle stop request message to the steering control unit 501, the engine control unit 502, and other devices via the communication unit 206. Further, the control unit 201 receives an engine start notification message from the engine control unit 502 via the communication unit 206. In addition, the control unit 201 receives a shift lever operation notification message from the shift lever control unit 503 via the communication unit 206.

  Next, the operation of this embodiment will be described.

  FIG. 4 is a flowchart showing the operation of the first exemplary embodiment of the present invention. The control unit 201 of the MPU 200 confirms whether an engine start notification message has been received from the engine control unit 502 (step S401). If an engine start notification message has been received (Yes in step S401), a timer is started (step S402).

  After starting the timer, the control unit 201 sends a drive command to the light source driving unit 105 of the sensor unit 100 installed at the two left and right positions of the steering 3 to turn on the vein pattern imaging light source 103 (step). S403). The control unit 201 transmits an imaging command to the image sensor 102, and causes the image sensor 102 to perform imaging (step S404). After imaging, the control unit 201 sends a drive command to the light source driving unit 105 and turns off the vein pattern imaging light source 103 (step S405).

  The control unit 201 acquires the image captured in step S404 from the imaging elements 102 of the left and right sensor units 100, and compares the vein pattern of the captured image with the vein pattern stored in the storage unit 204 (step S406). It is confirmed whether or not they match (step S407).

  In step S407, when any one of the vein patterns acquired from the left and right sensor units 100 does not match (No in step S407), the control unit 201 promptly sends a lock request message to the steering control unit 501. Send and lock the steering. In addition, a vehicle stop request message is transmitted to the engine control unit 502, and the engine of the vehicle is stopped (step S413).

  When the vein patterns acquired from the left and right sensor units 100 match in step S407 (Yes in step S407), the control unit 201 sends a drive command to the light source driving unit 105, and the alcohol imaging light source 104. Is turned on (step S408). The control unit 201 transmits an imaging command to the image sensor 102, and causes the image sensor 102 to perform imaging (step S409). After imaging, the control unit 201 sends a drive command to the light source driving unit 105 to turn off the alcohol imaging light source 104 (step S410).

  The control unit 201 acquires the image captured in step S409 from the image sensor 102, and confirms whether or not the portion of the captured image in which the light irradiated by the alcohol imaging light source 104 is absorbed and appears black is present. (Step S411). If there is no black portion in either of the captured images acquired from the left and right sensor units 100 (No in step S411), the driver is notified that alcohol has not been detected (step S412). When the display device is mounted on the vehicle, the notification that alcohol has not been detected may be output as a character on the display screen of the display device. In addition, when a sound output device is mounted on the vehicle, an undetected notification may be output as sound from the sound output device.

  In step S411, if any of the captured images acquired from the left and right sensor units 100 is black (Yes in step S411), the driver may be taking alcohol. A lock request message is immediately transmitted to the steering control unit 501 to lock the steering. Further, a vehicle stop request message is transmitted to the engine control unit, and the vehicle engine is stopped (step S413).

  After executing the process of step S412, it is confirmed whether or not the timer has elapsed for 3 minutes (step S414). In step S414, when the timer has elapsed for 3 minutes, the control unit 201 returns to step S402 and starts the timer again. Although the timer setting time is 3 minutes, the timer setting time may be arbitrarily set by a manufacturer, a government agency, or the like who has no possibility of becoming a vehicle driver.

  As described above, according to the first embodiment, the personal authentication and the drinking determination are performed at regular intervals by the timer. Therefore, a driver who has not drunk can be prevented from impersonating the driver, such as switching to a driver who has drunk after passing the personal authentication and the drunk determination, and drunk driving can be more reliably prevented.

  In the present embodiment, one sensor unit 100 is installed at each of the two left and right upper portions of the rear surface of the steering 3, but a plurality of sensor units 100 may be installed at one location.

  If a plurality of sensor units 100 are installed in one place as described above, a plurality of fingers to be measured can be provided, so that more accurate personal authentication and drinking determination can be performed.

  In step S401, the control unit 201 starts the timer when receiving the engine start notification message. However, the control unit 201 starts the timer when any operation that can recognize the driver's intention to start driving is performed. It may be. For example, the timer may be started when the driver moves the shift lever to the drive mode and receives a shift lever operation notification message from the shift lever control unit 503.

  In step S407, the control unit 201 may pass the personal authentication if either one of the vein patterns acquired from the left and right sensor units 100 matches.

  Moreover, in step S411, the control unit 201 may be configured to change the set value of the timer between the alcohol drinking determination and the alcohol non-drinking determination. Set the timer setting time so that the driver cannot change driving with a third party, or set it to a time that allows only a short driving time even if the driver can change driving, and suppresses driver changes. Set the effective time.

  Further, in step S411, the control unit 201 stores a record of drinking determination as a file in the storage unit 204 at the time of alcohol drinking determination so that the vehicle manager can later confirm the driver's drinking. Also good.

  In step S413, when the driver is driving, the control unit 201 determines that the lock request message and the vehicle stop request are passed after a sufficient time has passed for the driver to move to a place where the driver can safely stop the vehicle. A message may be transmitted.

  In addition, when a display device is mounted on the vehicle before executing personal authentication, the fact may be output as a character on the display screen of the display device. Moreover, when the audio | voice output apparatus is mounted in the vehicle, you may output that from an audio | voice output apparatus as an audio | voice.

  If the driver is notified before performing the personal authentication in such a manner, the driver may place his / her finger on the sensor unit 100 of the steering wheel 3 when the notification is received, It is no longer necessary to leave

  Further, although the driver's vein pattern is stored in the storage unit 204 in advance, an unregistered driver whose vein pattern is not stored in the storage unit 204 may be additionally registered later. In order to realize such a form, for example, when the vein patterns do not match in step S407, the control unit 201 temporarily stores the captured image in the image sensor 102, and in step S413, the vehicle When the engine is stopped, immediately before the power supply to the MPU 200 is stopped, a decrease in the power supply voltage of the MPU 200 is detected, and the captured image stored in the image sensor 102 until the power supply is stopped is newly The vein pattern may be stored in the storage unit 204.

  If the vein pattern can be additionally registered in the storage unit 204 later, the number of registrants can be increased by the user himself / herself.

FIG. 5 is a block diagram showing a main part of the drunk driving prevention apparatus according to the present invention. As shown in FIG. 5, personal authentication means 11 (implemented by the control unit 201 in the embodiment) that performs personal authentication based on biometric information of the driver's finger, and alcohol detection from the blood vessel of the driver's finger Drinking determination means 12 (in the embodiment, realized by the control unit 201) for determining drinking by
A control unit 13 (implemented by the control unit 201 in the embodiment) that causes the personal authentication unit 11 to perform personal authentication and the drinking determination unit 12 to perform drinking determination at regular intervals, is provided. 13 disables the driving operation of the vehicle according to the authentication result of the personal authentication and the determination result of the drinking determination, and stops the engine.

  In the above embodiment, the following drunk driving prevention device is also disclosed.

(1) The control means 13 is provided with a timer, and starts when the engine is started or the shift lever is operated by the driver. When the timer set time elapses, the personal authentication by the personal authentication means 11 and the drinking determination means 12 If you pass the personal authentication and the drinking determination, restart the timer.If you fail to pass either the personal authentication or the drinking determination, stop the vehicle engine, A drunk driving prevention device that locks the steering of a vehicle.

(2) As shown in FIG. 6, the vein pattern imaging light source 21 (implemented in the embodiment with the vein pattern imaging light source 103) and the alcohol imaging light source 22 (in the embodiment, the alcohol imaging light source 104). And a sensor 20 (in the embodiment, realized by the sensor unit 100) including the imaging means 23 (in the embodiment, realized by the imaging device 102). Reference numeral 20 denotes a drunk driving prevention device provided at the steering of the vehicle.

(3) As shown in FIG. 7, the storage unit 14 (which is realized by the storage unit 204 in the embodiment) that stores the vein pattern of the driver's finger is provided, and the vein pattern imaging light source 21 is a vein. The imaging means 23 images the driver's finger irradiated with light from the vein pattern imaging light source 21, and the personal authentication means 11 captures the imaging means. A drunk driving prevention apparatus that performs personal authentication by comparing the captured image of the driver's finger imaged by the above and the vein pattern stored in the storage unit 14.

(4) The alcohol imaging light source 22 irradiates light of a wavelength that is absorbed by the alcohol component flowing through the blood vessel, and the imaging means 23 images the driver's finger irradiated with the light from the alcohol imaging light source 22. The drunk determination means 12 is a drunk driving prevention apparatus that determines that the drunk drink is detected when there is a portion in which the light from the alcohol imaging light source 22 is absorbed in the captured image of the driver's finger captured by the image capturing means 23.

DESCRIPTION OF SYMBOLS 1 Front panel 2 Windshield 3 Steering 4 Driver's finger 11 Personal authentication means 12 Drinking determination means 13 Control means 14 Storage means 20 Sensor 21, 103 Light source for vein pattern imaging 22, 104 Light source for alcohol imaging 23 Imaging means 100 Sensor unit DESCRIPTION OF SYMBOLS 101 Lens 102 Image pick-up element 105 Light source drive part 106 Finger placing part 107 Finger placing surface 108 Circuit board 110 Image | video part 200 MPU
201 Control unit 202 ROM
203 RAM
204 Storage Unit 205 Connection Unit 206 Communication Unit 500 Network 501 Steering Control Unit 502 Engine Control Unit 503 Shift Lever Control Unit

Claims (5)

Personal authentication means for performing personal authentication based on the biometric information of the driver's finger;
A drinking determination means for determining drinking by detecting alcohol from a blood vessel of a driver's finger;
For each predetermined period, the personal authentication unit performs personal authentication, the drinking determination unit performs drinking determination, and the driving operation of the vehicle is disabled according to the authentication result of personal authentication and the determination result of drinking determination. , and control means for Ru to stop the engine,
The control means includes a timer,
When the engine is started or a shift lever is operated by the driver, the timer is started, and when the timer setting time has elapsed, personal authentication by the personal authentication means and drinking determination by the drinking determination means are executed,
If you pass the personal authentication and drinking judgment, restart the timer,
A drunk driving prevention device characterized by stopping the engine of the vehicle and locking the steering of the vehicle when either of the personal authentication and the drinking determination cannot be passed . A sensor including a light source for vein pattern imaging, a light source for alcohol imaging, and an imaging means;
The drunk driving prevention device according to claim 1 , wherein the sensor is provided in a steering of a vehicle. Comprising storage means for storing the finger vein pattern of the driver;
The vein pattern imaging light source emits light of a wavelength that is absorbed by the reduced hemoglobin component flowing through the vein,
The imaging means images the driver's finger irradiated with the light from the vein pattern imaging light source,
The drunk driving prevention apparatus according to claim 2 , wherein the personal authentication means performs personal authentication by comparing a captured image of the driver's finger imaged by the imaging means with a vein pattern stored in the storage means. The alcohol imaging light source emits light of a wavelength that is absorbed by the alcohol component flowing through the blood vessel,
The imaging means images the driver's finger irradiated with light from the alcohol imaging light source,
Drinking determining means, the drinking and determines claim 2 or claim 3 when the light from the alcohol imaging light source in the captured image of the finger of the driver that has been captured there was a portion that is absorbed by the imaging means The drunk driving prevention device according to 1. A driver impersonation prevention method executed in a vehicle system equipped with a drunk driving prevention device,
When the driver starts the engine or operates the shift lever, the timer is started. When the timer setting time has elapsed, personal authentication based on the biometric information of the driver's finger and alcohol drinking from the driver's finger blood vessel When the personal authentication and the drinking determination are passed, the timer is restarted. When either the personal authentication or the drinking determination cannot be passed, the vehicle engine is stopped and the vehicle is stopped. A driver's spoofing prevention method characterized by locking the steering of the vehicle.

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